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1/*
2 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
3 *
4 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
5 * PMC-Sierra Inc
6 *
7 * Copyright (C) 2008, 2009 PMC Sierra Inc
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
22 * USA
23 *
24 */
25#include <linux/fs.h>
26#include <linux/init.h>
27#include <linux/types.h>
28#include <linux/errno.h>
29#include <linux/kernel.h>
30#include <linux/ioport.h>
31#include <linux/delay.h>
32#include <linux/pci.h>
33#include <linux/wait.h>
34#include <linux/spinlock.h>
35#include <linux/sched.h>
36#include <linux/interrupt.h>
37#include <linux/blkdev.h>
38#include <linux/firmware.h>
39#include <linux/module.h>
40#include <linux/moduleparam.h>
41#include <linux/hdreg.h>
42#include <linux/version.h>
43#include <linux/io.h>
44#include <linux/slab.h>
45#include <asm/irq.h>
46#include <asm/processor.h>
47#include <linux/libata.h>
48#include <linux/mutex.h>
49#include <scsi/scsi.h>
50#include <scsi/scsi_host.h>
51#include <scsi/scsi_device.h>
52#include <scsi/scsi_tcq.h>
53#include <scsi/scsi_eh.h>
54#include <scsi/scsi_cmnd.h>
55#include <scsi/scsicam.h>
56
57#include "pmcraid.h"
58
59/*
60 * Module configuration parameters
61 */
62static unsigned int pmcraid_debug_log;
63static unsigned int pmcraid_disable_aen;
64static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
65static unsigned int pmcraid_enable_msix;
66
67/*
68 * Data structures to support multiple adapters by the LLD.
69 * pmcraid_adapter_count - count of configured adapters
70 */
71static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
72
73/*
74 * Supporting user-level control interface through IOCTL commands.
75 * pmcraid_major - major number to use
76 * pmcraid_minor - minor number(s) to use
77 */
78static unsigned int pmcraid_major;
79static struct class *pmcraid_class;
80DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
81
82/*
83 * Module parameters
84 */
85MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
86MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
87MODULE_LICENSE("GPL");
88MODULE_VERSION(PMCRAID_DRIVER_VERSION);
89
90module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
91MODULE_PARM_DESC(log_level,
92 "Enables firmware error code logging, default :1 high-severity"
93 " errors, 2: all errors including high-severity errors,"
94 " 0: disables logging");
95
96module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
97MODULE_PARM_DESC(debug,
98 "Enable driver verbose message logging. Set 1 to enable."
99 "(default: 0)");
100
101module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
102MODULE_PARM_DESC(disable_aen,
103 "Disable driver aen notifications to apps. Set 1 to disable."
104 "(default: 0)");
105
106/* chip specific constants for PMC MaxRAID controllers (same for
107 * 0x5220 and 0x8010
108 */
109static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
110 {
111 .ioastatus = 0x0,
112 .ioarrin = 0x00040,
113 .mailbox = 0x7FC30,
114 .global_intr_mask = 0x00034,
115 .ioa_host_intr = 0x0009C,
116 .ioa_host_intr_clr = 0x000A0,
117 .ioa_host_msix_intr = 0x7FC40,
118 .ioa_host_mask = 0x7FC28,
119 .ioa_host_mask_clr = 0x7FC28,
120 .host_ioa_intr = 0x00020,
121 .host_ioa_intr_clr = 0x00020,
122 .transop_timeout = 300
123 }
124};
125
126/*
127 * PCI device ids supported by pmcraid driver
128 */
129static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
130 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
131 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
132 },
133 {}
134};
135
136MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
137
138
139
140/**
141 * pmcraid_slave_alloc - Prepare for commands to a device
142 * @scsi_dev: scsi device struct
143 *
144 * This function is called by mid-layer prior to sending any command to the new
145 * device. Stores resource entry details of the device in scsi_device struct.
146 * Queuecommand uses the resource handle and other details to fill up IOARCB
147 * while sending commands to the device.
148 *
149 * Return value:
150 * 0 on success / -ENXIO if device does not exist
151 */
152static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
153{
154 struct pmcraid_resource_entry *temp, *res = NULL;
155 struct pmcraid_instance *pinstance;
156 u8 target, bus, lun;
157 unsigned long lock_flags;
158 int rc = -ENXIO;
159 u16 fw_version;
160
161 pinstance = shost_priv(scsi_dev->host);
162
163 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
164
165 /* Driver exposes VSET and GSCSI resources only; all other device types
166 * are not exposed. Resource list is synchronized using resource lock
167 * so any traversal or modifications to the list should be done inside
168 * this lock
169 */
170 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
171 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
172
173 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
174 if (RES_IS_VSET(temp->cfg_entry)) {
175 if (fw_version <= PMCRAID_FW_VERSION_1)
176 target = temp->cfg_entry.unique_flags1;
177 else
178 target = temp->cfg_entry.array_id & 0xFF;
179
180 if (target > PMCRAID_MAX_VSET_TARGETS)
181 continue;
182 bus = PMCRAID_VSET_BUS_ID;
183 lun = 0;
184 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
185 target = RES_TARGET(temp->cfg_entry.resource_address);
186 bus = PMCRAID_PHYS_BUS_ID;
187 lun = RES_LUN(temp->cfg_entry.resource_address);
188 } else {
189 continue;
190 }
191
192 if (bus == scsi_dev->channel &&
193 target == scsi_dev->id &&
194 lun == scsi_dev->lun) {
195 res = temp;
196 break;
197 }
198 }
199
200 if (res) {
201 res->scsi_dev = scsi_dev;
202 scsi_dev->hostdata = res;
203 res->change_detected = 0;
204 atomic_set(&res->read_failures, 0);
205 atomic_set(&res->write_failures, 0);
206 rc = 0;
207 }
208 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
209 return rc;
210}
211
212/**
213 * pmcraid_slave_configure - Configures a SCSI device
214 * @scsi_dev: scsi device struct
215 *
216 * This function is executed by SCSI mid layer just after a device is first
217 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
218 * timeout value (default 30s) will be over-written to a higher value (60s)
219 * and max_sectors value will be over-written to 512. It also sets queue depth
220 * to host->cmd_per_lun value
221 *
222 * Return value:
223 * 0 on success
224 */
225static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
226{
227 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
228
229 if (!res)
230 return 0;
231
232 /* LLD exposes VSETs and Enclosure devices only */
233 if (RES_IS_GSCSI(res->cfg_entry) &&
234 scsi_dev->type != TYPE_ENCLOSURE)
235 return -ENXIO;
236
237 pmcraid_info("configuring %x:%x:%x:%x\n",
238 scsi_dev->host->unique_id,
239 scsi_dev->channel,
240 scsi_dev->id,
241 scsi_dev->lun);
242
243 if (RES_IS_GSCSI(res->cfg_entry)) {
244 scsi_dev->allow_restart = 1;
245 } else if (RES_IS_VSET(res->cfg_entry)) {
246 scsi_dev->allow_restart = 1;
247 blk_queue_rq_timeout(scsi_dev->request_queue,
248 PMCRAID_VSET_IO_TIMEOUT);
249 blk_queue_max_hw_sectors(scsi_dev->request_queue,
250 PMCRAID_VSET_MAX_SECTORS);
251 }
252
253 if (scsi_dev->tagged_supported &&
254 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
255 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
256 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
257 scsi_dev->host->cmd_per_lun);
258 } else {
259 scsi_adjust_queue_depth(scsi_dev, 0,
260 scsi_dev->host->cmd_per_lun);
261 }
262
263 return 0;
264}
265
266/**
267 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
268 *
269 * @scsi_dev: scsi device struct
270 *
271 * This is called by mid-layer before removing a device. Pointer assignments
272 * done in pmcraid_slave_alloc will be reset to NULL here.
273 *
274 * Return value
275 * none
276 */
277static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
278{
279 struct pmcraid_resource_entry *res;
280
281 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
282
283 if (res)
284 res->scsi_dev = NULL;
285
286 scsi_dev->hostdata = NULL;
287}
288
289/**
290 * pmcraid_change_queue_depth - Change the device's queue depth
291 * @scsi_dev: scsi device struct
292 * @depth: depth to set
293 * @reason: calling context
294 *
295 * Return value
296 * actual depth set
297 */
298static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
299 int reason)
300{
301 if (reason != SCSI_QDEPTH_DEFAULT)
302 return -EOPNOTSUPP;
303
304 if (depth > PMCRAID_MAX_CMD_PER_LUN)
305 depth = PMCRAID_MAX_CMD_PER_LUN;
306
307 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
308
309 return scsi_dev->queue_depth;
310}
311
312/**
313 * pmcraid_change_queue_type - Change the device's queue type
314 * @scsi_dev: scsi device struct
315 * @tag: type of tags to use
316 *
317 * Return value:
318 * actual queue type set
319 */
320static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
321{
322 struct pmcraid_resource_entry *res;
323
324 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
325
326 if ((res) && scsi_dev->tagged_supported &&
327 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
328 scsi_set_tag_type(scsi_dev, tag);
329
330 if (tag)
331 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
332 else
333 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
334 } else
335 tag = 0;
336
337 return tag;
338}
339
340
341/**
342 * pmcraid_init_cmdblk - initializes a command block
343 *
344 * @cmd: pointer to struct pmcraid_cmd to be initialized
345 * @index: if >=0 first time initialization; otherwise reinitialization
346 *
347 * Return Value
348 * None
349 */
350void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
351{
352 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
353 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
354
355 if (index >= 0) {
356 /* first time initialization (called from probe) */
357 u32 ioasa_offset =
358 offsetof(struct pmcraid_control_block, ioasa);
359
360 cmd->index = index;
361 ioarcb->response_handle = cpu_to_le32(index << 2);
362 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
363 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
364 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
365 } else {
366 /* re-initialization of various lengths, called once command is
367 * processed by IOA
368 */
369 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
370 ioarcb->hrrq_id = 0;
371 ioarcb->request_flags0 = 0;
372 ioarcb->request_flags1 = 0;
373 ioarcb->cmd_timeout = 0;
374 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
375 ioarcb->ioadl_bus_addr = 0;
376 ioarcb->ioadl_length = 0;
377 ioarcb->data_transfer_length = 0;
378 ioarcb->add_cmd_param_length = 0;
379 ioarcb->add_cmd_param_offset = 0;
380 cmd->ioa_cb->ioasa.ioasc = 0;
381 cmd->ioa_cb->ioasa.residual_data_length = 0;
382 cmd->time_left = 0;
383 }
384
385 cmd->cmd_done = NULL;
386 cmd->scsi_cmd = NULL;
387 cmd->release = 0;
388 cmd->completion_req = 0;
389 cmd->sense_buffer = 0;
390 cmd->sense_buffer_dma = 0;
391 cmd->dma_handle = 0;
392 init_timer(&cmd->timer);
393}
394
395/**
396 * pmcraid_reinit_cmdblk - reinitialize a command block
397 *
398 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
399 *
400 * Return Value
401 * None
402 */
403static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
404{
405 pmcraid_init_cmdblk(cmd, -1);
406}
407
408/**
409 * pmcraid_get_free_cmd - get a free cmd block from command block pool
410 * @pinstance: adapter instance structure
411 *
412 * Return Value:
413 * returns pointer to cmd block or NULL if no blocks are available
414 */
415static struct pmcraid_cmd *pmcraid_get_free_cmd(
416 struct pmcraid_instance *pinstance
417)
418{
419 struct pmcraid_cmd *cmd = NULL;
420 unsigned long lock_flags;
421
422 /* free cmd block list is protected by free_pool_lock */
423 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
424
425 if (!list_empty(&pinstance->free_cmd_pool)) {
426 cmd = list_entry(pinstance->free_cmd_pool.next,
427 struct pmcraid_cmd, free_list);
428 list_del(&cmd->free_list);
429 }
430 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
431
432 /* Initialize the command block before giving it the caller */
433 if (cmd != NULL)
434 pmcraid_reinit_cmdblk(cmd);
435 return cmd;
436}
437
438/**
439 * pmcraid_return_cmd - return a completed command block back into free pool
440 * @cmd: pointer to the command block
441 *
442 * Return Value:
443 * nothing
444 */
445void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
446{
447 struct pmcraid_instance *pinstance = cmd->drv_inst;
448 unsigned long lock_flags;
449
450 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
451 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
452 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
453}
454
455/**
456 * pmcraid_read_interrupts - reads IOA interrupts
457 *
458 * @pinstance: pointer to adapter instance structure
459 *
460 * Return value
461 * interrupts read from IOA
462 */
463static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
464{
465 return (pinstance->interrupt_mode) ?
466 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
467 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
468}
469
470/**
471 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
472 *
473 * @pinstance: pointer to per adapter instance structure
474 * @intrs: interrupts to disable
475 *
476 * Return Value
477 * None
478 */
479static void pmcraid_disable_interrupts(
480 struct pmcraid_instance *pinstance,
481 u32 intrs
482)
483{
484 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
485 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
486
487 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
488 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
489 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
490
491 if (!pinstance->interrupt_mode) {
492 iowrite32(intrs,
493 pinstance->int_regs.ioa_host_interrupt_mask_reg);
494 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
495 }
496}
497
498/**
499 * pmcraid_enable_interrupts - Enables specified interrupts
500 *
501 * @pinstance: pointer to per adapter instance structure
502 * @intr: interrupts to enable
503 *
504 * Return Value
505 * None
506 */
507static void pmcraid_enable_interrupts(
508 struct pmcraid_instance *pinstance,
509 u32 intrs
510)
511{
512 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
513 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
514
515 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
516
517 if (!pinstance->interrupt_mode) {
518 iowrite32(~intrs,
519 pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
521 }
522
523 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
524 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
525 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
526}
527
528/**
529 * pmcraid_clr_trans_op - clear trans to op interrupt
530 *
531 * @pinstance: pointer to per adapter instance structure
532 *
533 * Return Value
534 * None
535 */
536static void pmcraid_clr_trans_op(
537 struct pmcraid_instance *pinstance
538)
539{
540 unsigned long lock_flags;
541
542 if (!pinstance->interrupt_mode) {
543 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
544 pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
546 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
547 pinstance->int_regs.ioa_host_interrupt_clr_reg);
548 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
549 }
550
551 if (pinstance->reset_cmd != NULL) {
552 del_timer(&pinstance->reset_cmd->timer);
553 spin_lock_irqsave(
554 pinstance->host->host_lock, lock_flags);
555 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
556 spin_unlock_irqrestore(
557 pinstance->host->host_lock, lock_flags);
558 }
559}
560
561/**
562 * pmcraid_reset_type - Determine the required reset type
563 * @pinstance: pointer to adapter instance structure
564 *
565 * IOA requires hard reset if any of the following conditions is true.
566 * 1. If HRRQ valid interrupt is not masked
567 * 2. IOA reset alert doorbell is set
568 * 3. If there are any error interrupts
569 */
570static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
571{
572 u32 mask;
573 u32 intrs;
574 u32 alerts;
575
576 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
577 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
578 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
579
580 if ((mask & INTRS_HRRQ_VALID) == 0 ||
581 (alerts & DOORBELL_IOA_RESET_ALERT) ||
582 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
583 pmcraid_info("IOA requires hard reset\n");
584 pinstance->ioa_hard_reset = 1;
585 }
586
587 /* If unit check is active, trigger the dump */
588 if (intrs & INTRS_IOA_UNIT_CHECK)
589 pinstance->ioa_unit_check = 1;
590}
591
592/**
593 * pmcraid_bist_done - completion function for PCI BIST
594 * @cmd: pointer to reset command
595 * Return Value
596 * none
597 */
598
599static void pmcraid_ioa_reset(struct pmcraid_cmd *);
600
601static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
602{
603 struct pmcraid_instance *pinstance = cmd->drv_inst;
604 unsigned long lock_flags;
605 int rc;
606 u16 pci_reg;
607
608 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
609
610 /* If PCI config space can't be accessed wait for another two secs */
611 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
612 cmd->time_left > 0) {
613 pmcraid_info("BIST not complete, waiting another 2 secs\n");
614 cmd->timer.expires = jiffies + cmd->time_left;
615 cmd->time_left = 0;
616 cmd->timer.data = (unsigned long)cmd;
617 cmd->timer.function =
618 (void (*)(unsigned long))pmcraid_bist_done;
619 add_timer(&cmd->timer);
620 } else {
621 cmd->time_left = 0;
622 pmcraid_info("BIST is complete, proceeding with reset\n");
623 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
624 pmcraid_ioa_reset(cmd);
625 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
626 }
627}
628
629/**
630 * pmcraid_start_bist - starts BIST
631 * @cmd: pointer to reset cmd
632 * Return Value
633 * none
634 */
635static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
636{
637 struct pmcraid_instance *pinstance = cmd->drv_inst;
638 u32 doorbells, intrs;
639
640 /* proceed with bist and wait for 2 seconds */
641 iowrite32(DOORBELL_IOA_START_BIST,
642 pinstance->int_regs.host_ioa_interrupt_reg);
643 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
644 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
645 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
646 doorbells, intrs);
647
648 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
649 cmd->timer.data = (unsigned long)cmd;
650 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
651 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
652 add_timer(&cmd->timer);
653}
654
655/**
656 * pmcraid_reset_alert_done - completion routine for reset_alert
657 * @cmd: pointer to command block used in reset sequence
658 * Return value
659 * None
660 */
661static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
662{
663 struct pmcraid_instance *pinstance = cmd->drv_inst;
664 u32 status = ioread32(pinstance->ioa_status);
665 unsigned long lock_flags;
666
667 /* if the critical operation in progress bit is set or the wait times
668 * out, invoke reset engine to proceed with hard reset. If there is
669 * some more time to wait, restart the timer
670 */
671 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
672 cmd->time_left <= 0) {
673 pmcraid_info("critical op is reset proceeding with reset\n");
674 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
675 pmcraid_ioa_reset(cmd);
676 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
677 } else {
678 pmcraid_info("critical op is not yet reset waiting again\n");
679 /* restart timer if some more time is available to wait */
680 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
681 cmd->timer.data = (unsigned long)cmd;
682 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
683 cmd->timer.function =
684 (void (*)(unsigned long))pmcraid_reset_alert_done;
685 add_timer(&cmd->timer);
686 }
687}
688
689/**
690 * pmcraid_reset_alert - alerts IOA for a possible reset
691 * @cmd : command block to be used for reset sequence.
692 *
693 * Return Value
694 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
695 * successfully written to IOA. Returns non-zero in case pci_config_space
696 * is not accessible
697 */
698static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
699static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
700{
701 struct pmcraid_instance *pinstance = cmd->drv_inst;
702 u32 doorbells;
703 int rc;
704 u16 pci_reg;
705
706 /* If we are able to access IOA PCI config space, alert IOA that we are
707 * going to reset it soon. This enables IOA to preserv persistent error
708 * data if any. In case memory space is not accessible, proceed with
709 * BIST or slot_reset
710 */
711 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
712 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
713
714 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
715 * reset IOA doesn't generate any interrupts when CRITICAL
716 * OPERATION bit is reset. A timer is started to wait for this
717 * bit to be reset.
718 */
719 cmd->time_left = PMCRAID_RESET_TIMEOUT;
720 cmd->timer.data = (unsigned long)cmd;
721 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
722 cmd->timer.function =
723 (void (*)(unsigned long))pmcraid_reset_alert_done;
724 add_timer(&cmd->timer);
725
726 iowrite32(DOORBELL_IOA_RESET_ALERT,
727 pinstance->int_regs.host_ioa_interrupt_reg);
728 doorbells =
729 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
730 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
731 } else {
732 pmcraid_info("PCI config is not accessible starting BIST\n");
733 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
734 pmcraid_start_bist(cmd);
735 }
736}
737
738/**
739 * pmcraid_timeout_handler - Timeout handler for internally generated ops
740 *
741 * @cmd : pointer to command structure, that got timedout
742 *
743 * This function blocks host requests and initiates an adapter reset.
744 *
745 * Return value:
746 * None
747 */
748static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
749{
750 struct pmcraid_instance *pinstance = cmd->drv_inst;
751 unsigned long lock_flags;
752
753 dev_info(&pinstance->pdev->dev,
754 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
755 cmd->ioa_cb->ioarcb.cdb[0]);
756
757 /* Command timeouts result in hard reset sequence. The command that got
758 * timed out may be the one used as part of reset sequence. In this
759 * case restart reset sequence using the same command block even if
760 * reset is in progress. Otherwise fail this command and get a free
761 * command block to restart the reset sequence.
762 */
763 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
764 if (!pinstance->ioa_reset_in_progress) {
765 pinstance->ioa_reset_attempts = 0;
766 cmd = pmcraid_get_free_cmd(pinstance);
767
768 /* If we are out of command blocks, just return here itself.
769 * Some other command's timeout handler can do the reset job
770 */
771 if (cmd == NULL) {
772 spin_unlock_irqrestore(pinstance->host->host_lock,
773 lock_flags);
774 pmcraid_err("no free cmnd block for timeout handler\n");
775 return;
776 }
777
778 pinstance->reset_cmd = cmd;
779 pinstance->ioa_reset_in_progress = 1;
780 } else {
781 pmcraid_info("reset is already in progress\n");
782
783 if (pinstance->reset_cmd != cmd) {
784 /* This command should have been given to IOA, this
785 * command will be completed by fail_outstanding_cmds
786 * anyway
787 */
788 pmcraid_err("cmd is pending but reset in progress\n");
789 }
790
791 /* If this command was being used as part of the reset
792 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
793 * causes fail_outstanding_commands not to return the command
794 * block back to free pool
795 */
796 if (cmd == pinstance->reset_cmd)
797 cmd->cmd_done = pmcraid_ioa_reset;
798 }
799
800 /* Notify apps of important IOA bringup/bringdown sequences */
801 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
802 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
803 pmcraid_notify_ioastate(pinstance,
804 PMC_DEVICE_EVENT_RESET_START);
805
806 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
807 scsi_block_requests(pinstance->host);
808 pmcraid_reset_alert(cmd);
809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
810}
811
812/**
813 * pmcraid_internal_done - completion routine for internally generated cmds
814 *
815 * @cmd: command that got response from IOA
816 *
817 * Return Value:
818 * none
819 */
820static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
821{
822 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
823 cmd->ioa_cb->ioarcb.cdb[0],
824 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
825
826 /* Some of the internal commands are sent with callers blocking for the
827 * response. Same will be indicated as part of cmd->completion_req
828 * field. Response path needs to wake up any waiters waiting for cmd
829 * completion if this flag is set.
830 */
831 if (cmd->completion_req) {
832 cmd->completion_req = 0;
833 complete(&cmd->wait_for_completion);
834 }
835
836 /* most of the internal commands are completed by caller itself, so
837 * no need to return the command block back to free pool until we are
838 * required to do so (e.g once done with initialization).
839 */
840 if (cmd->release) {
841 cmd->release = 0;
842 pmcraid_return_cmd(cmd);
843 }
844}
845
846/**
847 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
848 *
849 * @cmd: command that got response from IOA
850 *
851 * This routine is called after driver re-reads configuration table due to a
852 * lost CCN. It returns the command block back to free pool and schedules
853 * worker thread to add/delete devices into the system.
854 *
855 * Return Value:
856 * none
857 */
858static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
859{
860 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
861 cmd->ioa_cb->ioarcb.cdb[0],
862 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
863
864 if (cmd->release) {
865 cmd->release = 0;
866 pmcraid_return_cmd(cmd);
867 }
868 pmcraid_info("scheduling worker for config table reinitialization\n");
869 schedule_work(&cmd->drv_inst->worker_q);
870}
871
872/**
873 * pmcraid_erp_done - Process completion of SCSI error response from device
874 * @cmd: pmcraid_command
875 *
876 * This function copies the sense buffer into the scsi_cmd struct and completes
877 * scsi_cmd by calling scsi_done function.
878 *
879 * Return value:
880 * none
881 */
882static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
883{
884 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
885 struct pmcraid_instance *pinstance = cmd->drv_inst;
886 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
887
888 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
889 scsi_cmd->result |= (DID_ERROR << 16);
890 scmd_printk(KERN_INFO, scsi_cmd,
891 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
892 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
893 }
894
895 /* if we had allocated sense buffers for request sense, copy the sense
896 * release the buffers
897 */
898 if (cmd->sense_buffer != NULL) {
899 memcpy(scsi_cmd->sense_buffer,
900 cmd->sense_buffer,
901 SCSI_SENSE_BUFFERSIZE);
902 pci_free_consistent(pinstance->pdev,
903 SCSI_SENSE_BUFFERSIZE,
904 cmd->sense_buffer, cmd->sense_buffer_dma);
905 cmd->sense_buffer = NULL;
906 cmd->sense_buffer_dma = 0;
907 }
908
909 scsi_dma_unmap(scsi_cmd);
910 pmcraid_return_cmd(cmd);
911 scsi_cmd->scsi_done(scsi_cmd);
912}
913
914/**
915 * pmcraid_fire_command - sends an IOA command to adapter
916 *
917 * This function adds the given block into pending command list
918 * and returns without waiting
919 *
920 * @cmd : command to be sent to the device
921 *
922 * Return Value
923 * None
924 */
925static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
926{
927 struct pmcraid_instance *pinstance = cmd->drv_inst;
928 unsigned long lock_flags;
929
930 /* Add this command block to pending cmd pool. We do this prior to
931 * writting IOARCB to ioarrin because IOA might complete the command
932 * by the time we are about to add it to the list. Response handler
933 * (isr/tasklet) looks for cmd block in the pending pending list.
934 */
935 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
936 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
937 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
938 atomic_inc(&pinstance->outstanding_cmds);
939
940 /* driver writes lower 32-bit value of IOARCB address only */
941 mb();
942 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
943 pinstance->ioarrin);
944}
945
946/**
947 * pmcraid_send_cmd - fires a command to IOA
948 *
949 * This function also sets up timeout function, and command completion
950 * function
951 *
952 * @cmd: pointer to the command block to be fired to IOA
953 * @cmd_done: command completion function, called once IOA responds
954 * @timeout: timeout to wait for this command completion
955 * @timeout_func: timeout handler
956 *
957 * Return value
958 * none
959 */
960static void pmcraid_send_cmd(
961 struct pmcraid_cmd *cmd,
962 void (*cmd_done) (struct pmcraid_cmd *),
963 unsigned long timeout,
964 void (*timeout_func) (struct pmcraid_cmd *)
965)
966{
967 /* initialize done function */
968 cmd->cmd_done = cmd_done;
969
970 if (timeout_func) {
971 /* setup timeout handler */
972 cmd->timer.data = (unsigned long)cmd;
973 cmd->timer.expires = jiffies + timeout;
974 cmd->timer.function = (void (*)(unsigned long))timeout_func;
975 add_timer(&cmd->timer);
976 }
977
978 /* fire the command to IOA */
979 _pmcraid_fire_command(cmd);
980}
981
982/**
983 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
984 * @cmd: pointer to the command block used for sending IOA shutdown command
985 *
986 * Return value
987 * None
988 */
989static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
990{
991 struct pmcraid_instance *pinstance = cmd->drv_inst;
992 unsigned long lock_flags;
993
994 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
995 pmcraid_ioa_reset(cmd);
996 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
997}
998
999/**
1000 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1001 *
1002 * @cmd: pointer to the command block used as part of reset sequence
1003 *
1004 * Return Value
1005 * None
1006 */
1007static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1008{
1009 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1010 cmd->ioa_cb->ioarcb.cdb[0],
1011 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1012
1013 /* Note that commands sent during reset require next command to be sent
1014 * to IOA. Hence reinit the done function as well as timeout function
1015 */
1016 pmcraid_reinit_cmdblk(cmd);
1017 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1018 cmd->ioa_cb->ioarcb.resource_handle =
1019 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1020 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1021 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1022
1023 /* fire shutdown command to hardware. */
1024 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1025 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1026
1027 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1028
1029 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
1030 PMCRAID_SHUTDOWN_TIMEOUT,
1031 pmcraid_timeout_handler);
1032}
1033
1034/**
1035 * pmcraid_get_fwversion_done - completion function for get_fwversion
1036 *
1037 * @cmd: pointer to command block used to send INQUIRY command
1038 *
1039 * Return Value
1040 * none
1041 */
1042static void pmcraid_querycfg(struct pmcraid_cmd *);
1043
1044static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1045{
1046 struct pmcraid_instance *pinstance = cmd->drv_inst;
1047 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1048 unsigned long lock_flags;
1049
1050 /* configuration table entry size depends on firmware version. If fw
1051 * version is not known, it is not possible to interpret IOA config
1052 * table
1053 */
1054 if (ioasc) {
1055 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1056 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1057 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1058 pmcraid_reset_alert(cmd);
1059 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1060 } else {
1061 pmcraid_querycfg(cmd);
1062 }
1063}
1064
1065/**
1066 * pmcraid_get_fwversion - reads firmware version information
1067 *
1068 * @cmd: pointer to command block used to send INQUIRY command
1069 *
1070 * Return Value
1071 * none
1072 */
1073static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1074{
1075 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1076 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1077 struct pmcraid_instance *pinstance = cmd->drv_inst;
1078 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1079
1080 pmcraid_reinit_cmdblk(cmd);
1081 ioarcb->request_type = REQ_TYPE_SCSI;
1082 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1083 ioarcb->cdb[0] = INQUIRY;
1084 ioarcb->cdb[1] = 1;
1085 ioarcb->cdb[2] = 0xD0;
1086 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1087 ioarcb->cdb[4] = data_size & 0xFF;
1088
1089 /* Since entire inquiry data it can be part of IOARCB itself
1090 */
1091 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1092 offsetof(struct pmcraid_ioarcb,
1093 add_data.u.ioadl[0]));
1094 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1095 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1096
1097 ioarcb->request_flags0 |= NO_LINK_DESCS;
1098 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1099 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1100 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1101 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1102 ioadl->data_len = cpu_to_le32(data_size);
1103
1104 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1105 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1106}
1107
1108/**
1109 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1110 * @cmd: pointer to command block to be used for identify hrrq
1111 *
1112 * Return Value
1113 * none
1114 */
1115static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1116{
1117 struct pmcraid_instance *pinstance = cmd->drv_inst;
1118 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1119 int index = cmd->hrrq_index;
1120 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1121 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1122 void (*done_function)(struct pmcraid_cmd *);
1123
1124 pmcraid_reinit_cmdblk(cmd);
1125 cmd->hrrq_index = index + 1;
1126
1127 if (cmd->hrrq_index < pinstance->num_hrrq) {
1128 done_function = pmcraid_identify_hrrq;
1129 } else {
1130 cmd->hrrq_index = 0;
1131 done_function = pmcraid_get_fwversion;
1132 }
1133
1134 /* Initialize ioarcb */
1135 ioarcb->request_type = REQ_TYPE_IOACMD;
1136 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1137
1138 /* initialize the hrrq number where IOA will respond to this command */
1139 ioarcb->hrrq_id = index;
1140 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1141 ioarcb->cdb[1] = index;
1142
1143 /* IOA expects 64-bit pci address to be written in B.E format
1144 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1145 */
1146 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1147 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1148
1149 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1150 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1151
1152 /* Subsequent commands require HRRQ identification to be successful.
1153 * Note that this gets called even during reset from SCSI mid-layer
1154 * or tasklet
1155 */
1156 pmcraid_send_cmd(cmd, done_function,
1157 PMCRAID_INTERNAL_TIMEOUT,
1158 pmcraid_timeout_handler);
1159}
1160
1161static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1162static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1163
1164/**
1165 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1166 *
1167 * @cmd: initialized command block pointer
1168 *
1169 * Return Value
1170 * none
1171 */
1172static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1173{
1174 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1175 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1176 else
1177 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1178
1179 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1180}
1181
1182/**
1183 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1184 *
1185 * @pinstance: pointer to adapter instance structure
1186 * @type: HCAM type
1187 *
1188 * Return Value
1189 * pointer to initialized pmcraid_cmd structure or NULL
1190 */
1191static struct pmcraid_cmd *pmcraid_init_hcam
1192(
1193 struct pmcraid_instance *pinstance,
1194 u8 type
1195)
1196{
1197 struct pmcraid_cmd *cmd;
1198 struct pmcraid_ioarcb *ioarcb;
1199 struct pmcraid_ioadl_desc *ioadl;
1200 struct pmcraid_hostrcb *hcam;
1201 void (*cmd_done) (struct pmcraid_cmd *);
1202 dma_addr_t dma;
1203 int rcb_size;
1204
1205 cmd = pmcraid_get_free_cmd(pinstance);
1206
1207 if (!cmd) {
1208 pmcraid_err("no free command blocks for hcam\n");
1209 return cmd;
1210 }
1211
1212 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1213 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1214 cmd_done = pmcraid_process_ccn;
1215 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1216 hcam = &pinstance->ccn;
1217 } else {
1218 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1219 cmd_done = pmcraid_process_ldn;
1220 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1221 hcam = &pinstance->ldn;
1222 }
1223
1224 /* initialize command pointer used for HCAM registration */
1225 hcam->cmd = cmd;
1226
1227 ioarcb = &cmd->ioa_cb->ioarcb;
1228 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1229 offsetof(struct pmcraid_ioarcb,
1230 add_data.u.ioadl[0]));
1231 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1232 ioadl = ioarcb->add_data.u.ioadl;
1233
1234 /* Initialize ioarcb */
1235 ioarcb->request_type = REQ_TYPE_HCAM;
1236 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1237 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1238 ioarcb->cdb[1] = type;
1239 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1240 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1241
1242 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1243
1244 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1245 ioadl[0].data_len = cpu_to_le32(rcb_size);
1246 ioadl[0].address = cpu_to_le32(dma);
1247
1248 cmd->cmd_done = cmd_done;
1249 return cmd;
1250}
1251
1252/**
1253 * pmcraid_send_hcam - Send an HCAM to IOA
1254 * @pinstance: ioa config struct
1255 * @type: HCAM type
1256 *
1257 * This function will send a Host Controlled Async command to IOA.
1258 *
1259 * Return value:
1260 * none
1261 */
1262static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1263{
1264 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1265 pmcraid_send_hcam_cmd(cmd);
1266}
1267
1268
1269/**
1270 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1271 *
1272 * @cmd: pointer to cmd that is used as cancelling command
1273 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1274 */
1275static void pmcraid_prepare_cancel_cmd(
1276 struct pmcraid_cmd *cmd,
1277 struct pmcraid_cmd *cmd_to_cancel
1278)
1279{
1280 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1281 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1282
1283 /* Get the resource handle to where the command to be aborted has been
1284 * sent.
1285 */
1286 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1287 ioarcb->request_type = REQ_TYPE_IOACMD;
1288 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1289 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1290
1291 /* IOARCB address of the command to be cancelled is given in
1292 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1293 * IOARCB address are not masked.
1294 */
1295 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1296 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1297}
1298
1299/**
1300 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1301 *
1302 * @cmd: command to be used as cancelling command
1303 * @type: HCAM type
1304 * @cmd_done: op done function for the cancelling command
1305 */
1306static void pmcraid_cancel_hcam(
1307 struct pmcraid_cmd *cmd,
1308 u8 type,
1309 void (*cmd_done) (struct pmcraid_cmd *)
1310)
1311{
1312 struct pmcraid_instance *pinstance;
1313 struct pmcraid_hostrcb *hcam;
1314
1315 pinstance = cmd->drv_inst;
1316 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1317 &pinstance->ldn : &pinstance->ccn;
1318
1319 /* prepare for cancelling previous hcam command. If the HCAM is
1320 * currently not pending with IOA, we would have hcam->cmd as non-null
1321 */
1322 if (hcam->cmd == NULL)
1323 return;
1324
1325 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1326
1327 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1328 * schedule queuecommand while we are doing this
1329 */
1330 pmcraid_send_cmd(cmd, cmd_done,
1331 PMCRAID_INTERNAL_TIMEOUT,
1332 pmcraid_timeout_handler);
1333}
1334
1335/**
1336 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1337 *
1338 * @cmd: command block to be used for cancelling the HCAM
1339 */
1340static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1341{
1342 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1343 cmd->ioa_cb->ioarcb.cdb[0],
1344 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1345
1346 pmcraid_reinit_cmdblk(cmd);
1347
1348 pmcraid_cancel_hcam(cmd,
1349 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1350 pmcraid_ioa_shutdown);
1351}
1352
1353/**
1354 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1355 *
1356 * @cmd: command block to be used for cancelling the HCAM
1357 */
1358static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1359{
1360 pmcraid_cancel_hcam(cmd,
1361 PMCRAID_HCAM_CODE_LOG_DATA,
1362 pmcraid_cancel_ccn);
1363}
1364
1365/**
1366 * pmcraid_expose_resource - check if the resource can be exposed to OS
1367 *
1368 * @fw_version: firmware version code
1369 * @cfgte: pointer to configuration table entry of the resource
1370 *
1371 * Return value:
1372 * true if resource can be added to midlayer, false(0) otherwise
1373 */
1374static int pmcraid_expose_resource(u16 fw_version,
1375 struct pmcraid_config_table_entry *cfgte)
1376{
1377 int retval = 0;
1378
1379 if (cfgte->resource_type == RES_TYPE_VSET) {
1380 if (fw_version <= PMCRAID_FW_VERSION_1)
1381 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1382 else
1383 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1384 (cfgte->unique_flags1 & 0x80) == 0);
1385
1386 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1387 retval = (RES_BUS(cfgte->resource_address) !=
1388 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1389 return retval;
1390}
1391
1392/* attributes supported by pmcraid_event_family */
1393enum {
1394 PMCRAID_AEN_ATTR_UNSPEC,
1395 PMCRAID_AEN_ATTR_EVENT,
1396 __PMCRAID_AEN_ATTR_MAX,
1397};
1398#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1399
1400/* commands supported by pmcraid_event_family */
1401enum {
1402 PMCRAID_AEN_CMD_UNSPEC,
1403 PMCRAID_AEN_CMD_EVENT,
1404 __PMCRAID_AEN_CMD_MAX,
1405};
1406#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1407
1408static struct genl_family pmcraid_event_family = {
1409 .id = GENL_ID_GENERATE,
1410 .name = "pmcraid",
1411 .version = 1,
1412 .maxattr = PMCRAID_AEN_ATTR_MAX
1413};
1414
1415/**
1416 * pmcraid_netlink_init - registers pmcraid_event_family
1417 *
1418 * Return value:
1419 * 0 if the pmcraid_event_family is successfully registered
1420 * with netlink generic, non-zero otherwise
1421 */
1422static int pmcraid_netlink_init(void)
1423{
1424 int result;
1425
1426 result = genl_register_family(&pmcraid_event_family);
1427
1428 if (result)
1429 return result;
1430
1431 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1432 pmcraid_event_family.id);
1433
1434 return result;
1435}
1436
1437/**
1438 * pmcraid_netlink_release - unregisters pmcraid_event_family
1439 *
1440 * Return value:
1441 * none
1442 */
1443static void pmcraid_netlink_release(void)
1444{
1445 genl_unregister_family(&pmcraid_event_family);
1446}
1447
1448/**
1449 * pmcraid_notify_aen - sends event msg to user space application
1450 * @pinstance: pointer to adapter instance structure
1451 * @type: HCAM type
1452 *
1453 * Return value:
1454 * 0 if success, error value in case of any failure.
1455 */
1456static int pmcraid_notify_aen(
1457 struct pmcraid_instance *pinstance,
1458 struct pmcraid_aen_msg *aen_msg,
1459 u32 data_size
1460)
1461{
1462 struct sk_buff *skb;
1463 void *msg_header;
1464 u32 total_size, nla_genl_hdr_total_size;
1465 int result;
1466
1467 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1468 MINOR(pinstance->cdev.dev));
1469 aen_msg->length = data_size;
1470
1471 data_size += sizeof(*aen_msg);
1472
1473 total_size = nla_total_size(data_size);
1474 /* Add GENL_HDR to total_size */
1475 nla_genl_hdr_total_size =
1476 (total_size + (GENL_HDRLEN +
1477 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1478 + NLMSG_HDRLEN);
1479 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1480
1481
1482 if (!skb) {
1483 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1484 total_size);
1485 return -ENOMEM;
1486 }
1487
1488 /* add the genetlink message header */
1489 msg_header = genlmsg_put(skb, 0, 0,
1490 &pmcraid_event_family, 0,
1491 PMCRAID_AEN_CMD_EVENT);
1492 if (!msg_header) {
1493 pmcraid_err("failed to copy command details\n");
1494 nlmsg_free(skb);
1495 return -ENOMEM;
1496 }
1497
1498 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1499
1500 if (result) {
1501 pmcraid_err("failed to copy AEN attribute data\n");
1502 nlmsg_free(skb);
1503 return -EINVAL;
1504 }
1505
1506 /* send genetlink multicast message to notify appplications */
1507 result = genlmsg_end(skb, msg_header);
1508
1509 if (result < 0) {
1510 pmcraid_err("genlmsg_end failed\n");
1511 nlmsg_free(skb);
1512 return result;
1513 }
1514
1515 result =
1516 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1517
1518 /* If there are no listeners, genlmsg_multicast may return non-zero
1519 * value.
1520 */
1521 if (result)
1522 pmcraid_info("error (%x) sending aen event message\n", result);
1523 return result;
1524}
1525
1526/**
1527 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1528 * @pinstance: pointer adapter instance structure
1529 *
1530 * Return value:
1531 * 0 if success, error value in case of any failure
1532 */
1533static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1534{
1535 return pmcraid_notify_aen(pinstance,
1536 pinstance->ccn.msg,
1537 pinstance->ccn.hcam->data_len +
1538 sizeof(struct pmcraid_hcam_hdr));
1539}
1540
1541/**
1542 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1543 * @pinstance: pointer adapter instance structure
1544 *
1545 * Return value:
1546 * 0 if success, error value in case of any failure
1547 */
1548static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1549{
1550 return pmcraid_notify_aen(pinstance,
1551 pinstance->ldn.msg,
1552 pinstance->ldn.hcam->data_len +
1553 sizeof(struct pmcraid_hcam_hdr));
1554}
1555
1556/**
1557 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1558 * @pinstance: pointer adapter instance structure
1559 * @evt: controller state event to be sent
1560 *
1561 * Return value:
1562 * 0 if success, error value in case of any failure
1563 */
1564static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1565{
1566 pinstance->scn.ioa_state = evt;
1567 pmcraid_notify_aen(pinstance,
1568 &pinstance->scn.msg,
1569 sizeof(u32));
1570}
1571
1572/**
1573 * pmcraid_handle_config_change - Handle a config change from the adapter
1574 * @pinstance: pointer to per adapter instance structure
1575 *
1576 * Return value:
1577 * none
1578 */
1579
1580static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1581{
1582 struct pmcraid_config_table_entry *cfg_entry;
1583 struct pmcraid_hcam_ccn *ccn_hcam;
1584 struct pmcraid_cmd *cmd;
1585 struct pmcraid_cmd *cfgcmd;
1586 struct pmcraid_resource_entry *res = NULL;
1587 unsigned long lock_flags;
1588 unsigned long host_lock_flags;
1589 u32 new_entry = 1;
1590 u32 hidden_entry = 0;
1591 u16 fw_version;
1592 int rc;
1593
1594 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1595 cfg_entry = &ccn_hcam->cfg_entry;
1596 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1597
1598 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1599 res: %x:%x:%x:%x\n",
1600 pinstance->ccn.hcam->ilid,
1601 pinstance->ccn.hcam->op_code,
1602 ((pinstance->ccn.hcam->timestamp1) |
1603 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
1604 pinstance->ccn.hcam->notification_type,
1605 pinstance->ccn.hcam->notification_lost,
1606 pinstance->ccn.hcam->flags,
1607 pinstance->host->unique_id,
1608 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1609 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1610 RES_BUS(cfg_entry->resource_address)),
1611 RES_IS_VSET(*cfg_entry) ?
1612 (fw_version <= PMCRAID_FW_VERSION_1 ?
1613 cfg_entry->unique_flags1 :
1614 cfg_entry->array_id & 0xFF) :
1615 RES_TARGET(cfg_entry->resource_address),
1616 RES_LUN(cfg_entry->resource_address));
1617
1618
1619 /* If this HCAM indicates a lost notification, read the config table */
1620 if (pinstance->ccn.hcam->notification_lost) {
1621 cfgcmd = pmcraid_get_free_cmd(pinstance);
1622 if (cfgcmd) {
1623 pmcraid_info("lost CCN, reading config table\b");
1624 pinstance->reinit_cfg_table = 1;
1625 pmcraid_querycfg(cfgcmd);
1626 } else {
1627 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1628 }
1629 goto out_notify_apps;
1630 }
1631
1632 /* If this resource is not going to be added to mid-layer, just notify
1633 * applications and return. If this notification is about hiding a VSET
1634 * resource, check if it was exposed already.
1635 */
1636 if (pinstance->ccn.hcam->notification_type ==
1637 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1638 cfg_entry->resource_type == RES_TYPE_VSET) {
1639
1640 if (fw_version <= PMCRAID_FW_VERSION_1)
1641 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1642 else
1643 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1644
1645 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1646 goto out_notify_apps;
1647 }
1648
1649 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1650 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1651 rc = memcmp(&res->cfg_entry.resource_address,
1652 &cfg_entry->resource_address,
1653 sizeof(cfg_entry->resource_address));
1654 if (!rc) {
1655 new_entry = 0;
1656 break;
1657 }
1658 }
1659
1660 if (new_entry) {
1661
1662 if (hidden_entry) {
1663 spin_unlock_irqrestore(&pinstance->resource_lock,
1664 lock_flags);
1665 goto out_notify_apps;
1666 }
1667
1668 /* If there are more number of resources than what driver can
1669 * manage, do not notify the applications about the CCN. Just
1670 * ignore this notifications and re-register the same HCAM
1671 */
1672 if (list_empty(&pinstance->free_res_q)) {
1673 spin_unlock_irqrestore(&pinstance->resource_lock,
1674 lock_flags);
1675 pmcraid_err("too many resources attached\n");
1676 spin_lock_irqsave(pinstance->host->host_lock,
1677 host_lock_flags);
1678 pmcraid_send_hcam(pinstance,
1679 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1680 spin_unlock_irqrestore(pinstance->host->host_lock,
1681 host_lock_flags);
1682 return;
1683 }
1684
1685 res = list_entry(pinstance->free_res_q.next,
1686 struct pmcraid_resource_entry, queue);
1687
1688 list_del(&res->queue);
1689 res->scsi_dev = NULL;
1690 res->reset_progress = 0;
1691 list_add_tail(&res->queue, &pinstance->used_res_q);
1692 }
1693
1694 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1695
1696 if (pinstance->ccn.hcam->notification_type ==
1697 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1698 if (res->scsi_dev) {
1699 if (fw_version <= PMCRAID_FW_VERSION_1)
1700 res->cfg_entry.unique_flags1 &= 0x7F;
1701 else
1702 res->cfg_entry.array_id &= 0xFF;
1703 res->change_detected = RES_CHANGE_DEL;
1704 res->cfg_entry.resource_handle =
1705 PMCRAID_INVALID_RES_HANDLE;
1706 schedule_work(&pinstance->worker_q);
1707 } else {
1708 /* This may be one of the non-exposed resources */
1709 list_move_tail(&res->queue, &pinstance->free_res_q);
1710 }
1711 } else if (!res->scsi_dev) {
1712 res->change_detected = RES_CHANGE_ADD;
1713 schedule_work(&pinstance->worker_q);
1714 }
1715 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1716
1717out_notify_apps:
1718
1719 /* Notify configuration changes to registered applications.*/
1720 if (!pmcraid_disable_aen)
1721 pmcraid_notify_ccn(pinstance);
1722
1723 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1724 if (cmd)
1725 pmcraid_send_hcam_cmd(cmd);
1726}
1727
1728/**
1729 * pmcraid_get_error_info - return error string for an ioasc
1730 * @ioasc: ioasc code
1731 * Return Value
1732 * none
1733 */
1734static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1735{
1736 int i;
1737 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1738 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1739 return &pmcraid_ioasc_error_table[i];
1740 }
1741 return NULL;
1742}
1743
1744/**
1745 * pmcraid_ioasc_logger - log IOASC information based user-settings
1746 * @ioasc: ioasc code
1747 * @cmd: pointer to command that resulted in 'ioasc'
1748 */
1749void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1750{
1751 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1752
1753 if (error_info == NULL ||
1754 cmd->drv_inst->current_log_level < error_info->log_level)
1755 return;
1756
1757 /* log the error string */
1758 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1759 cmd->ioa_cb->ioarcb.cdb[0],
1760 cmd->ioa_cb->ioarcb.resource_handle,
1761 le32_to_cpu(ioasc), error_info->error_string);
1762}
1763
1764/**
1765 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1766 *
1767 * @pinstance: pointer to per adapter instance structure
1768 *
1769 * Return value:
1770 * none
1771 */
1772static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1773{
1774 struct pmcraid_hcam_ldn *hcam_ldn;
1775 u32 ioasc;
1776
1777 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1778
1779 pmcraid_info
1780 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1781 pinstance->ldn.hcam->ilid,
1782 pinstance->ldn.hcam->op_code,
1783 pinstance->ldn.hcam->notification_type,
1784 pinstance->ldn.hcam->notification_lost,
1785 pinstance->ldn.hcam->flags,
1786 pinstance->ldn.hcam->overlay_id);
1787
1788 /* log only the errors, no need to log informational log entries */
1789 if (pinstance->ldn.hcam->notification_type !=
1790 NOTIFICATION_TYPE_ERROR_LOG)
1791 return;
1792
1793 if (pinstance->ldn.hcam->notification_lost ==
1794 HOSTRCB_NOTIFICATIONS_LOST)
1795 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1796
1797 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1798
1799 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1800 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1801 dev_info(&pinstance->pdev->dev,
1802 "UnitAttention due to IOA Bus Reset\n");
1803 scsi_report_bus_reset(
1804 pinstance->host,
1805 RES_BUS(hcam_ldn->error_log.fd_ra));
1806 }
1807
1808 return;
1809}
1810
1811/**
1812 * pmcraid_process_ccn - Op done function for a CCN.
1813 * @cmd: pointer to command struct
1814 *
1815 * This function is the op done function for a configuration
1816 * change notification
1817 *
1818 * Return value:
1819 * none
1820 */
1821static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1822{
1823 struct pmcraid_instance *pinstance = cmd->drv_inst;
1824 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1825 unsigned long lock_flags;
1826
1827 pinstance->ccn.cmd = NULL;
1828 pmcraid_return_cmd(cmd);
1829
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, or IOA bringdown sequence is in progress, no need to
1832 * re-register the hcam
1833 */
1834 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1835 atomic_read(&pinstance->ccn.ignore) == 1) {
1836 return;
1837 } else if (ioasc) {
1838 dev_info(&pinstance->pdev->dev,
1839 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1840 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1841 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1842 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1843 } else {
1844 pmcraid_handle_config_change(pinstance);
1845 }
1846}
1847
1848/**
1849 * pmcraid_process_ldn - op done function for an LDN
1850 * @cmd: pointer to command block
1851 *
1852 * Return value
1853 * none
1854 */
1855static void pmcraid_initiate_reset(struct pmcraid_instance *);
1856static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1857
1858static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1859{
1860 struct pmcraid_instance *pinstance = cmd->drv_inst;
1861 struct pmcraid_hcam_ldn *ldn_hcam =
1862 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1863 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1864 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1865 unsigned long lock_flags;
1866
1867 /* return the command block back to freepool */
1868 pinstance->ldn.cmd = NULL;
1869 pmcraid_return_cmd(cmd);
1870
1871 /* If driver initiated IOA reset happened while this hcam was pending
1872 * with IOA, no need to re-register the hcam as reset engine will do it
1873 * once reset sequence is complete
1874 */
1875 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1876 atomic_read(&pinstance->ccn.ignore) == 1) {
1877 return;
1878 } else if (!ioasc) {
1879 pmcraid_handle_error_log(pinstance);
1880 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1881 spin_lock_irqsave(pinstance->host->host_lock,
1882 lock_flags);
1883 pmcraid_initiate_reset(pinstance);
1884 spin_unlock_irqrestore(pinstance->host->host_lock,
1885 lock_flags);
1886 return;
1887 }
1888 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1889 pinstance->timestamp_error = 1;
1890 pmcraid_set_timestamp(cmd);
1891 }
1892 } else {
1893 dev_info(&pinstance->pdev->dev,
1894 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1895 }
1896 /* send netlink message for HCAM notification if enabled */
1897 if (!pmcraid_disable_aen)
1898 pmcraid_notify_ldn(pinstance);
1899
1900 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1901 if (cmd)
1902 pmcraid_send_hcam_cmd(cmd);
1903}
1904
1905/**
1906 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1907 *
1908 * @pinstance: pointer per adapter instance structure
1909 *
1910 * Return Value
1911 * none
1912 */
1913static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1914{
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1916 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1917}
1918
1919/**
1920 * pmcraid_unregister_hcams - cancel HCAMs registered already
1921 * @cmd: pointer to command used as part of reset sequence
1922 */
1923static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1924{
1925 struct pmcraid_instance *pinstance = cmd->drv_inst;
1926
1927 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1928 * handling hcam response though it is not necessary. In order to
1929 * prevent this, set 'ignore', so that bring-down sequence doesn't
1930 * re-send any more hcams
1931 */
1932 atomic_set(&pinstance->ccn.ignore, 1);
1933 atomic_set(&pinstance->ldn.ignore, 1);
1934
1935 /* If adapter reset was forced as part of runtime reset sequence,
1936 * start the reset sequence. Reset will be triggered even in case
1937 * IOA unit_check.
1938 */
1939 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1940 pinstance->ioa_unit_check) {
1941 pinstance->force_ioa_reset = 0;
1942 pinstance->ioa_unit_check = 0;
1943 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1944 pmcraid_reset_alert(cmd);
1945 return;
1946 }
1947
1948 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1949 * one after the other. So CCN cancellation will be triggered by
1950 * pmcraid_cancel_ldn itself.
1951 */
1952 pmcraid_cancel_ldn(cmd);
1953}
1954
1955/**
1956 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1957 * @pinstance: pointer to adapter instance structure
1958 * Return Value
1959 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1960 */
1961static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1962
1963static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1964{
1965 u32 intrs;
1966
1967 pmcraid_reinit_buffers(pinstance);
1968 intrs = pmcraid_read_interrupts(pinstance);
1969
1970 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1971
1972 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1973 if (!pinstance->interrupt_mode) {
1974 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1975 pinstance->int_regs.
1976 ioa_host_interrupt_mask_reg);
1977 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1978 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1979 }
1980 return 1;
1981 } else {
1982 return 0;
1983 }
1984}
1985
1986/**
1987 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1988 * @cmd : pointer to reset command block
1989 *
1990 * Return Value
1991 * none
1992 */
1993static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1994{
1995 struct pmcraid_instance *pinstance = cmd->drv_inst;
1996 u32 int_reg;
1997 u32 doorbell;
1998
1999 /* There will be an interrupt when Transition to Operational bit is
2000 * set so tasklet would execute next reset task. The timeout handler
2001 * would re-initiate a reset
2002 */
2003 cmd->cmd_done = pmcraid_ioa_reset;
2004 cmd->timer.data = (unsigned long)cmd;
2005 cmd->timer.expires = jiffies +
2006 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2007 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2008
2009 if (!timer_pending(&cmd->timer))
2010 add_timer(&cmd->timer);
2011
2012 /* Enable destructive diagnostics on IOA if it is not yet in
2013 * operational state
2014 */
2015 doorbell = DOORBELL_RUNTIME_RESET |
2016 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2017
2018 /* Since we do RESET_ALERT and Start BIST we have to again write
2019 * MSIX Doorbell to indicate the interrupt mode
2020 */
2021 if (pinstance->interrupt_mode) {
2022 iowrite32(DOORBELL_INTR_MODE_MSIX,
2023 pinstance->int_regs.host_ioa_interrupt_reg);
2024 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2025 }
2026
2027 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
2028 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2029 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
2030
2031 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2032 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2033 int_reg);
2034}
2035
2036/**
2037 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2038 *
2039 * @pinstance: pointer to adapter instance structure
2040 *
2041 * Return Value
2042 * none
2043 */
2044static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2045{
2046 pmcraid_info("%s is not yet implemented\n", __func__);
2047}
2048
2049/**
2050 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2051 * @pinstance: pointer to adapter instance structure
2052 *
2053 * This function fails all outstanding ops. If they are submitted to IOA
2054 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2055 * otherwise just completes the commands and returns the cmd blocks to free
2056 * pool.
2057 *
2058 * Return value:
2059 * none
2060 */
2061static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2062{
2063 struct pmcraid_cmd *cmd, *temp;
2064 unsigned long lock_flags;
2065
2066 /* pending command list is protected by pending_pool_lock. Its
2067 * traversal must be done as within this lock
2068 */
2069 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2070 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2071 free_list) {
2072 list_del(&cmd->free_list);
2073 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2074 lock_flags);
2075 cmd->ioa_cb->ioasa.ioasc =
2076 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2077 cmd->ioa_cb->ioasa.ilid =
2078 cpu_to_be32(PMCRAID_DRIVER_ILID);
2079
2080 /* In case the command timer is still running */
2081 del_timer(&cmd->timer);
2082
2083 /* If this is an IO command, complete it by invoking scsi_done
2084 * function. If this is one of the internal commands other
2085 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2086 * complete it
2087 */
2088 if (cmd->scsi_cmd) {
2089
2090 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2091 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2092
2093 scsi_cmd->result |= DID_ERROR << 16;
2094
2095 scsi_dma_unmap(scsi_cmd);
2096 pmcraid_return_cmd(cmd);
2097
2098 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2099 le32_to_cpu(resp) >> 2,
2100 cmd->ioa_cb->ioarcb.cdb[0],
2101 scsi_cmd->result);
2102 scsi_cmd->scsi_done(scsi_cmd);
2103 } else if (cmd->cmd_done == pmcraid_internal_done ||
2104 cmd->cmd_done == pmcraid_erp_done) {
2105 cmd->cmd_done(cmd);
2106 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2107 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2108 pmcraid_return_cmd(cmd);
2109 }
2110
2111 atomic_dec(&pinstance->outstanding_cmds);
2112 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2113 }
2114
2115 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2116}
2117
2118/**
2119 * pmcraid_ioa_reset - Implementation of IOA reset logic
2120 *
2121 * @cmd: pointer to the cmd block to be used for entire reset process
2122 *
2123 * This function executes most of the steps required for IOA reset. This gets
2124 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2125 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2126 * synchronized using host lock. Various functions called during reset process
2127 * would make use of a single command block, pointer to which is also stored in
2128 * adapter instance structure.
2129 *
2130 * Return Value
2131 * None
2132 */
2133static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2134{
2135 struct pmcraid_instance *pinstance = cmd->drv_inst;
2136 u8 reset_complete = 0;
2137
2138 pinstance->ioa_reset_in_progress = 1;
2139
2140 if (pinstance->reset_cmd != cmd) {
2141 pmcraid_err("reset is called with different command block\n");
2142 pinstance->reset_cmd = cmd;
2143 }
2144
2145 pmcraid_info("reset_engine: state = %d, command = %p\n",
2146 pinstance->ioa_state, cmd);
2147
2148 switch (pinstance->ioa_state) {
2149
2150 case IOA_STATE_DEAD:
2151 /* If IOA is offline, whatever may be the reset reason, just
2152 * return. callers might be waiting on the reset wait_q, wake
2153 * up them
2154 */
2155 pmcraid_err("IOA is offline no reset is possible\n");
2156 reset_complete = 1;
2157 break;
2158
2159 case IOA_STATE_IN_BRINGDOWN:
2160 /* we enter here, once ioa shutdown command is processed by IOA
2161 * Alert IOA for a possible reset. If reset alert fails, IOA
2162 * goes through hard-reset
2163 */
2164 pmcraid_disable_interrupts(pinstance, ~0);
2165 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2166 pmcraid_reset_alert(cmd);
2167 break;
2168
2169 case IOA_STATE_UNKNOWN:
2170 /* We may be called during probe or resume. Some pre-processing
2171 * is required for prior to reset
2172 */
2173 scsi_block_requests(pinstance->host);
2174
2175 /* If asked to reset while IOA was processing responses or
2176 * there are any error responses then IOA may require
2177 * hard-reset.
2178 */
2179 if (pinstance->ioa_hard_reset == 0) {
2180 if (ioread32(pinstance->ioa_status) &
2181 INTRS_TRANSITION_TO_OPERATIONAL) {
2182 pmcraid_info("sticky bit set, bring-up\n");
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_reinit_cmdblk(cmd);
2185 pmcraid_identify_hrrq(cmd);
2186 } else {
2187 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2188 pmcraid_soft_reset(cmd);
2189 }
2190 } else {
2191 /* Alert IOA of a possible reset and wait for critical
2192 * operation in progress bit to reset
2193 */
2194 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2195 pmcraid_reset_alert(cmd);
2196 }
2197 break;
2198
2199 case IOA_STATE_IN_RESET_ALERT:
2200 /* If critical operation in progress bit is reset or wait gets
2201 * timed out, reset proceeds with starting BIST on the IOA.
2202 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2203 * they are 3 or more, reset engine marks IOA dead and returns
2204 */
2205 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2206 pmcraid_start_bist(cmd);
2207 break;
2208
2209 case IOA_STATE_IN_HARD_RESET:
2210 pinstance->ioa_reset_attempts++;
2211
2212 /* retry reset if we haven't reached maximum allowed limit */
2213 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2214 pinstance->ioa_reset_attempts = 0;
2215 pmcraid_err("IOA didn't respond marking it as dead\n");
2216 pinstance->ioa_state = IOA_STATE_DEAD;
2217
2218 if (pinstance->ioa_bringdown)
2219 pmcraid_notify_ioastate(pinstance,
2220 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2221 else
2222 pmcraid_notify_ioastate(pinstance,
2223 PMC_DEVICE_EVENT_RESET_FAILED);
2224 reset_complete = 1;
2225 break;
2226 }
2227
2228 /* Once either bist or pci reset is done, restore PCI config
2229 * space. If this fails, proceed with hard reset again
2230 */
2231 pci_restore_state(pinstance->pdev);
2232
2233 /* fail all pending commands */
2234 pmcraid_fail_outstanding_cmds(pinstance);
2235
2236 /* check if unit check is active, if so extract dump */
2237 if (pinstance->ioa_unit_check) {
2238 pmcraid_info("unit check is active\n");
2239 pinstance->ioa_unit_check = 0;
2240 pmcraid_get_dump(pinstance);
2241 pinstance->ioa_reset_attempts--;
2242 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2243 pmcraid_reset_alert(cmd);
2244 break;
2245 }
2246
2247 /* if the reset reason is to bring-down the ioa, we might be
2248 * done with the reset restore pci_config_space and complete
2249 * the reset
2250 */
2251 if (pinstance->ioa_bringdown) {
2252 pmcraid_info("bringing down the adapter\n");
2253 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2254 pinstance->ioa_bringdown = 0;
2255 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2256 pmcraid_notify_ioastate(pinstance,
2257 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2258 reset_complete = 1;
2259 } else {
2260 /* bring-up IOA, so proceed with soft reset
2261 * Reinitialize hrrq_buffers and their indices also
2262 * enable interrupts after a pci_restore_state
2263 */
2264 if (pmcraid_reset_enable_ioa(pinstance)) {
2265 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2266 pmcraid_info("bringing up the adapter\n");
2267 pmcraid_reinit_cmdblk(cmd);
2268 pmcraid_identify_hrrq(cmd);
2269 } else {
2270 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2271 pmcraid_soft_reset(cmd);
2272 }
2273 }
2274 break;
2275
2276 case IOA_STATE_IN_SOFT_RESET:
2277 /* TRANSITION TO OPERATIONAL is on so start initialization
2278 * sequence
2279 */
2280 pmcraid_info("In softreset proceeding with bring-up\n");
2281 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2282
2283 /* Initialization commands start with HRRQ identification. From
2284 * now on tasklet completes most of the commands as IOA is up
2285 * and intrs are enabled
2286 */
2287 pmcraid_identify_hrrq(cmd);
2288 break;
2289
2290 case IOA_STATE_IN_BRINGUP:
2291 /* we are done with bringing up of IOA, change the ioa_state to
2292 * operational and wake up any waiters
2293 */
2294 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2295 reset_complete = 1;
2296 break;
2297
2298 case IOA_STATE_OPERATIONAL:
2299 default:
2300 /* When IOA is operational and a reset is requested, check for
2301 * the reset reason. If reset is to bring down IOA, unregister
2302 * HCAMs and initiate shutdown; if adapter reset is forced then
2303 * restart reset sequence again
2304 */
2305 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2306 pinstance->force_ioa_reset == 0) {
2307 pmcraid_notify_ioastate(pinstance,
2308 PMC_DEVICE_EVENT_RESET_SUCCESS);
2309 reset_complete = 1;
2310 } else {
2311 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2312 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2313 pmcraid_reinit_cmdblk(cmd);
2314 pmcraid_unregister_hcams(cmd);
2315 }
2316 break;
2317 }
2318
2319 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2320 * OPERATIONAL. Reset all control variables used during reset, wake up
2321 * any waiting threads and let the SCSI mid-layer send commands. Note
2322 * that host_lock must be held before invoking scsi_report_bus_reset.
2323 */
2324 if (reset_complete) {
2325 pinstance->ioa_reset_in_progress = 0;
2326 pinstance->ioa_reset_attempts = 0;
2327 pinstance->reset_cmd = NULL;
2328 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2329 pinstance->ioa_bringdown = 0;
2330 pmcraid_return_cmd(cmd);
2331
2332 /* If target state is to bring up the adapter, proceed with
2333 * hcam registration and resource exposure to mid-layer.
2334 */
2335 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2336 pmcraid_register_hcams(pinstance);
2337
2338 wake_up_all(&pinstance->reset_wait_q);
2339 }
2340
2341 return;
2342}
2343
2344/**
2345 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2346 * ISR/tasklet during error interrupts including IOA unit check. If reset
2347 * is already in progress, it just returns, otherwise initiates IOA reset
2348 * to bring IOA up to operational state.
2349 *
2350 * @pinstance: pointer to adapter instance structure
2351 *
2352 * Return value
2353 * none
2354 */
2355static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2356{
2357 struct pmcraid_cmd *cmd;
2358
2359 /* If the reset is already in progress, just return, otherwise start
2360 * reset sequence and return
2361 */
2362 if (!pinstance->ioa_reset_in_progress) {
2363 scsi_block_requests(pinstance->host);
2364 cmd = pmcraid_get_free_cmd(pinstance);
2365
2366 if (cmd == NULL) {
2367 pmcraid_err("no cmnd blocks for initiate_reset\n");
2368 return;
2369 }
2370
2371 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2372 pinstance->reset_cmd = cmd;
2373 pinstance->force_ioa_reset = 1;
2374 pmcraid_notify_ioastate(pinstance,
2375 PMC_DEVICE_EVENT_RESET_START);
2376 pmcraid_ioa_reset(cmd);
2377 }
2378}
2379
2380/**
2381 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2382 * or bringdown IOA
2383 * @pinstance: pointer adapter instance structure
2384 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2385 * @target_state: expected target state after reset
2386 *
2387 * Note: This command initiates reset and waits for its completion. Hence this
2388 * should not be called from isr/timer/tasklet functions (timeout handlers,
2389 * error response handlers and interrupt handlers).
2390 *
2391 * Return Value
2392 * 1 in case ioa_state is not target_state, 0 otherwise.
2393 */
2394static int pmcraid_reset_reload(
2395 struct pmcraid_instance *pinstance,
2396 u8 shutdown_type,
2397 u8 target_state
2398)
2399{
2400 struct pmcraid_cmd *reset_cmd = NULL;
2401 unsigned long lock_flags;
2402 int reset = 1;
2403
2404 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2405
2406 if (pinstance->ioa_reset_in_progress) {
2407 pmcraid_info("reset_reload: reset is already in progress\n");
2408
2409 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2410
2411 wait_event(pinstance->reset_wait_q,
2412 !pinstance->ioa_reset_in_progress);
2413
2414 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2415
2416 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2417 spin_unlock_irqrestore(pinstance->host->host_lock,
2418 lock_flags);
2419 pmcraid_info("reset_reload: IOA is dead\n");
2420 return reset;
2421 } else if (pinstance->ioa_state == target_state) {
2422 reset = 0;
2423 }
2424 }
2425
2426 if (reset) {
2427 pmcraid_info("reset_reload: proceeding with reset\n");
2428 scsi_block_requests(pinstance->host);
2429 reset_cmd = pmcraid_get_free_cmd(pinstance);
2430
2431 if (reset_cmd == NULL) {
2432 pmcraid_err("no free cmnd for reset_reload\n");
2433 spin_unlock_irqrestore(pinstance->host->host_lock,
2434 lock_flags);
2435 return reset;
2436 }
2437
2438 if (shutdown_type == SHUTDOWN_NORMAL)
2439 pinstance->ioa_bringdown = 1;
2440
2441 pinstance->ioa_shutdown_type = shutdown_type;
2442 pinstance->reset_cmd = reset_cmd;
2443 pinstance->force_ioa_reset = reset;
2444 pmcraid_info("reset_reload: initiating reset\n");
2445 pmcraid_ioa_reset(reset_cmd);
2446 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2447 pmcraid_info("reset_reload: waiting for reset to complete\n");
2448 wait_event(pinstance->reset_wait_q,
2449 !pinstance->ioa_reset_in_progress);
2450
2451 pmcraid_info("reset_reload: reset is complete !!\n");
2452 scsi_unblock_requests(pinstance->host);
2453 if (pinstance->ioa_state == target_state)
2454 reset = 0;
2455 }
2456
2457 return reset;
2458}
2459
2460/**
2461 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2462 *
2463 * @pinstance: pointer to adapter instance structure
2464 *
2465 * Return Value
2466 * whatever is returned from pmcraid_reset_reload
2467 */
2468static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2469{
2470 return pmcraid_reset_reload(pinstance,
2471 SHUTDOWN_NORMAL,
2472 IOA_STATE_UNKNOWN);
2473}
2474
2475/**
2476 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2477 *
2478 * @pinstance: pointer to adapter instance structure
2479 *
2480 * Return Value
2481 * whatever is returned from pmcraid_reset_reload
2482 */
2483static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2484{
2485 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2486
2487 return pmcraid_reset_reload(pinstance,
2488 SHUTDOWN_NONE,
2489 IOA_STATE_OPERATIONAL);
2490}
2491
2492/**
2493 * pmcraid_request_sense - Send request sense to a device
2494 * @cmd: pmcraid command struct
2495 *
2496 * This function sends a request sense to a device as a result of a check
2497 * condition. This method re-uses the same command block that failed earlier.
2498 */
2499static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2500{
2501 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2502 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2503
2504 /* allocate DMAable memory for sense buffers */
2505 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2506 SCSI_SENSE_BUFFERSIZE,
2507 &cmd->sense_buffer_dma);
2508
2509 if (cmd->sense_buffer == NULL) {
2510 pmcraid_err
2511 ("couldn't allocate sense buffer for request sense\n");
2512 pmcraid_erp_done(cmd);
2513 return;
2514 }
2515
2516 /* re-use the command block */
2517 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2518 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2519 ioarcb->request_flags0 = (SYNC_COMPLETE |
2520 NO_LINK_DESCS |
2521 INHIBIT_UL_CHECK);
2522 ioarcb->request_type = REQ_TYPE_SCSI;
2523 ioarcb->cdb[0] = REQUEST_SENSE;
2524 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2525
2526 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2527 offsetof(struct pmcraid_ioarcb,
2528 add_data.u.ioadl[0]));
2529 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2530
2531 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2532
2533 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2534 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2535 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2536
2537 /* request sense might be called as part of error response processing
2538 * which runs in tasklets context. It is possible that mid-layer might
2539 * schedule queuecommand during this time, hence, writting to IOARRIN
2540 * must be protect by host_lock
2541 */
2542 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2543 PMCRAID_REQUEST_SENSE_TIMEOUT,
2544 pmcraid_timeout_handler);
2545}
2546
2547/**
2548 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2549 * @cmd: command that failed
2550 * @sense: true if request_sense is required after cancel all
2551 *
2552 * This function sends a cancel all to a device to clear the queue.
2553 */
2554static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2555{
2556 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2557 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2558 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2559 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2560 : pmcraid_request_sense;
2561
2562 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2563 ioarcb->request_flags0 = SYNC_OVERRIDE;
2564 ioarcb->request_type = REQ_TYPE_IOACMD;
2565 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2566
2567 if (RES_IS_GSCSI(res->cfg_entry))
2568 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2569
2570 ioarcb->ioadl_bus_addr = 0;
2571 ioarcb->ioadl_length = 0;
2572 ioarcb->data_transfer_length = 0;
2573 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2574
2575 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2576 * schedule queuecommand while we are doing this
2577 */
2578 pmcraid_send_cmd(cmd, cmd_done,
2579 PMCRAID_REQUEST_SENSE_TIMEOUT,
2580 pmcraid_timeout_handler);
2581}
2582
2583/**
2584 * pmcraid_frame_auto_sense: frame fixed format sense information
2585 *
2586 * @cmd: pointer to failing command block
2587 *
2588 * Return value
2589 * none
2590 */
2591static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2592{
2593 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2594 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2595 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2596 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2597 u32 failing_lba = 0;
2598
2599 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2600 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2601
2602 if (RES_IS_VSET(res->cfg_entry) &&
2603 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2604 ioasa->u.vset.failing_lba_hi != 0) {
2605
2606 sense_buf[0] = 0x72;
2607 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2608 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2609 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2610
2611 sense_buf[7] = 12;
2612 sense_buf[8] = 0;
2613 sense_buf[9] = 0x0A;
2614 sense_buf[10] = 0x80;
2615
2616 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2617
2618 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2619 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2620 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2621 sense_buf[15] = failing_lba & 0x000000ff;
2622
2623 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2624
2625 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2626 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2627 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2628 sense_buf[19] = failing_lba & 0x000000ff;
2629 } else {
2630 sense_buf[0] = 0x70;
2631 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2632 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2633 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2634
2635 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2636 if (RES_IS_VSET(res->cfg_entry))
2637 failing_lba =
2638 le32_to_cpu(ioasa->u.
2639 vset.failing_lba_lo);
2640 sense_buf[0] |= 0x80;
2641 sense_buf[3] = (failing_lba >> 24) & 0xff;
2642 sense_buf[4] = (failing_lba >> 16) & 0xff;
2643 sense_buf[5] = (failing_lba >> 8) & 0xff;
2644 sense_buf[6] = failing_lba & 0xff;
2645 }
2646
2647 sense_buf[7] = 6; /* additional length */
2648 }
2649}
2650
2651/**
2652 * pmcraid_error_handler - Error response handlers for a SCSI op
2653 * @cmd: pointer to pmcraid_cmd that has failed
2654 *
2655 * This function determines whether or not to initiate ERP on the affected
2656 * device. This is called from a tasklet, which doesn't hold any locks.
2657 *
2658 * Return value:
2659 * 0 it caller can complete the request, otherwise 1 where in error
2660 * handler itself completes the request and returns the command block
2661 * back to free-pool
2662 */
2663static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2664{
2665 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2666 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2667 struct pmcraid_instance *pinstance = cmd->drv_inst;
2668 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2669 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2670 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2671 u32 sense_copied = 0;
2672
2673 if (!res) {
2674 pmcraid_info("resource pointer is NULL\n");
2675 return 0;
2676 }
2677
2678 /* If this was a SCSI read/write command keep count of errors */
2679 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2680 atomic_inc(&res->read_failures);
2681 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2682 atomic_inc(&res->write_failures);
2683
2684 if (!RES_IS_GSCSI(res->cfg_entry) &&
2685 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2686 pmcraid_frame_auto_sense(cmd);
2687 }
2688
2689 /* Log IOASC/IOASA information based on user settings */
2690 pmcraid_ioasc_logger(ioasc, cmd);
2691
2692 switch (masked_ioasc) {
2693
2694 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2695 scsi_cmd->result |= (DID_ABORT << 16);
2696 break;
2697
2698 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2699 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2700 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2701 break;
2702
2703 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2704 res->sync_reqd = 1;
2705 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2706 break;
2707
2708 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2709 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2710 break;
2711
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2713 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2714 if (!res->reset_progress)
2715 scsi_report_bus_reset(pinstance->host,
2716 scsi_cmd->device->channel);
2717 scsi_cmd->result |= (DID_ERROR << 16);
2718 break;
2719
2720 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2721 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2722 res->sync_reqd = 1;
2723
2724 /* if check_condition is not active return with error otherwise
2725 * get/frame the sense buffer
2726 */
2727 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2728 SAM_STAT_CHECK_CONDITION &&
2729 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2730 return 0;
2731
2732 /* If we have auto sense data as part of IOASA pass it to
2733 * mid-layer
2734 */
2735 if (ioasa->auto_sense_length != 0) {
2736 short sense_len = ioasa->auto_sense_length;
2737 int data_size = min_t(u16, le16_to_cpu(sense_len),
2738 SCSI_SENSE_BUFFERSIZE);
2739
2740 memcpy(scsi_cmd->sense_buffer,
2741 ioasa->sense_data,
2742 data_size);
2743 sense_copied = 1;
2744 }
2745
2746 if (RES_IS_GSCSI(res->cfg_entry))
2747 pmcraid_cancel_all(cmd, sense_copied);
2748 else if (sense_copied)
2749 pmcraid_erp_done(cmd);
2750 else
2751 pmcraid_request_sense(cmd);
2752
2753 return 1;
2754
2755 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2756 break;
2757
2758 default:
2759 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2760 scsi_cmd->result |= (DID_ERROR << 16);
2761 break;
2762 }
2763 return 0;
2764}
2765
2766/**
2767 * pmcraid_reset_device - device reset handler functions
2768 *
2769 * @scsi_cmd: scsi command struct
2770 * @modifier: reset modifier indicating the reset sequence to be performed
2771 *
2772 * This function issues a device reset to the affected device.
2773 * A LUN reset will be sent to the device first. If that does
2774 * not work, a target reset will be sent.
2775 *
2776 * Return value:
2777 * SUCCESS / FAILED
2778 */
2779static int pmcraid_reset_device(
2780 struct scsi_cmnd *scsi_cmd,
2781 unsigned long timeout,
2782 u8 modifier
2783)
2784{
2785 struct pmcraid_cmd *cmd;
2786 struct pmcraid_instance *pinstance;
2787 struct pmcraid_resource_entry *res;
2788 struct pmcraid_ioarcb *ioarcb;
2789 unsigned long lock_flags;
2790 u32 ioasc;
2791
2792 pinstance =
2793 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2794 res = scsi_cmd->device->hostdata;
2795
2796 if (!res) {
2797 sdev_printk(KERN_ERR, scsi_cmd->device,
2798 "reset_device: NULL resource pointer\n");
2799 return FAILED;
2800 }
2801
2802 /* If adapter is currently going through reset/reload, return failed.
2803 * This will force the mid-layer to call _eh_bus/host reset, which
2804 * will then go to sleep and wait for the reset to complete
2805 */
2806 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2807 if (pinstance->ioa_reset_in_progress ||
2808 pinstance->ioa_state == IOA_STATE_DEAD) {
2809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2810 return FAILED;
2811 }
2812
2813 res->reset_progress = 1;
2814 pmcraid_info("Resetting %s resource with addr %x\n",
2815 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2816 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2817 le32_to_cpu(res->cfg_entry.resource_address));
2818
2819 /* get a free cmd block */
2820 cmd = pmcraid_get_free_cmd(pinstance);
2821
2822 if (cmd == NULL) {
2823 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2824 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2825 return FAILED;
2826 }
2827
2828 ioarcb = &cmd->ioa_cb->ioarcb;
2829 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2830 ioarcb->request_type = REQ_TYPE_IOACMD;
2831 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2832
2833 /* Initialize reset modifier bits */
2834 if (modifier)
2835 modifier = ENABLE_RESET_MODIFIER | modifier;
2836
2837 ioarcb->cdb[1] = modifier;
2838
2839 init_completion(&cmd->wait_for_completion);
2840 cmd->completion_req = 1;
2841
2842 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2843 cmd->ioa_cb->ioarcb.cdb[0],
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2845 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2846
2847 pmcraid_send_cmd(cmd,
2848 pmcraid_internal_done,
2849 timeout,
2850 pmcraid_timeout_handler);
2851
2852 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2853
2854 /* RESET_DEVICE command completes after all pending IOARCBs are
2855 * completed. Once this command is completed, pmcraind_internal_done
2856 * will wake up the 'completion' queue.
2857 */
2858 wait_for_completion(&cmd->wait_for_completion);
2859
2860 /* complete the command here itself and return the command block
2861 * to free list
2862 */
2863 pmcraid_return_cmd(cmd);
2864 res->reset_progress = 0;
2865 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2866
2867 /* set the return value based on the returned ioasc */
2868 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2869}
2870
2871/**
2872 * _pmcraid_io_done - helper for pmcraid_io_done function
2873 *
2874 * @cmd: pointer to pmcraid command struct
2875 * @reslen: residual data length to be set in the ioasa
2876 * @ioasc: ioasc either returned by IOA or set by driver itself.
2877 *
2878 * This function is invoked by pmcraid_io_done to complete mid-layer
2879 * scsi ops.
2880 *
2881 * Return value:
2882 * 0 if caller is required to return it to free_pool. Returns 1 if
2883 * caller need not worry about freeing command block as error handler
2884 * will take care of that.
2885 */
2886
2887static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2888{
2889 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2890 int rc = 0;
2891
2892 scsi_set_resid(scsi_cmd, reslen);
2893
2894 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2895 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2896 cmd->ioa_cb->ioarcb.cdb[0],
2897 ioasc, scsi_cmd->result);
2898
2899 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2900 rc = pmcraid_error_handler(cmd);
2901
2902 if (rc == 0) {
2903 scsi_dma_unmap(scsi_cmd);
2904 scsi_cmd->scsi_done(scsi_cmd);
2905 }
2906
2907 return rc;
2908}
2909
2910/**
2911 * pmcraid_io_done - SCSI completion function
2912 *
2913 * @cmd: pointer to pmcraid command struct
2914 *
2915 * This function is invoked by tasklet/mid-layer error handler to completing
2916 * the SCSI ops sent from mid-layer.
2917 *
2918 * Return value
2919 * none
2920 */
2921
2922static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2923{
2924 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2925 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2926
2927 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2928 pmcraid_return_cmd(cmd);
2929}
2930
2931/**
2932 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2933 *
2934 * @cmd: command block of the command to be aborted
2935 *
2936 * Return Value:
2937 * returns pointer to command structure used as cancelling cmd
2938 */
2939static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2940{
2941 struct pmcraid_cmd *cancel_cmd;
2942 struct pmcraid_instance *pinstance;
2943 struct pmcraid_resource_entry *res;
2944
2945 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2946 res = cmd->scsi_cmd->device->hostdata;
2947
2948 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2949
2950 if (cancel_cmd == NULL) {
2951 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2952 return NULL;
2953 }
2954
2955 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2956
2957 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2958 cmd->ioa_cb->ioarcb.cdb[0],
2959 cmd->ioa_cb->ioarcb.response_handle >> 2);
2960
2961 init_completion(&cancel_cmd->wait_for_completion);
2962 cancel_cmd->completion_req = 1;
2963
2964 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2965 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2966 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2967 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2968
2969 pmcraid_send_cmd(cancel_cmd,
2970 pmcraid_internal_done,
2971 PMCRAID_INTERNAL_TIMEOUT,
2972 pmcraid_timeout_handler);
2973 return cancel_cmd;
2974}
2975
2976/**
2977 * pmcraid_abort_complete - Waits for ABORT TASK completion
2978 *
2979 * @cancel_cmd: command block use as cancelling command
2980 *
2981 * Return Value:
2982 * returns SUCCESS if ABORT TASK has good completion
2983 * otherwise FAILED
2984 */
2985static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2986{
2987 struct pmcraid_resource_entry *res;
2988 u32 ioasc;
2989
2990 wait_for_completion(&cancel_cmd->wait_for_completion);
2991 res = cancel_cmd->res;
2992 cancel_cmd->res = NULL;
2993 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2994
2995 /* If the abort task is not timed out we will get a Good completion
2996 * as sense_key, otherwise we may get one the following responses
2997 * due to subsequent bus reset or device reset. In case IOASC is
2998 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2999 */
3000 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3001 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3002 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3003 res->sync_reqd = 1;
3004 ioasc = 0;
3005 }
3006
3007 /* complete the command here itself */
3008 pmcraid_return_cmd(cancel_cmd);
3009 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3010}
3011
3012/**
3013 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3014 *
3015 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3016 * mid-layer ensures that no other commands are queued. This
3017 * never gets called under interrupt, but a separate eh thread.
3018 *
3019 * Return value:
3020 * SUCCESS / FAILED
3021 */
3022static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3023{
3024 struct pmcraid_instance *pinstance;
3025 struct pmcraid_cmd *cmd;
3026 struct pmcraid_resource_entry *res;
3027 unsigned long host_lock_flags;
3028 unsigned long pending_lock_flags;
3029 struct pmcraid_cmd *cancel_cmd = NULL;
3030 int cmd_found = 0;
3031 int rc = FAILED;
3032
3033 pinstance =
3034 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3035
3036 scmd_printk(KERN_INFO, scsi_cmd,
3037 "I/O command timed out, aborting it.\n");
3038
3039 res = scsi_cmd->device->hostdata;
3040
3041 if (res == NULL)
3042 return rc;
3043
3044 /* If we are currently going through reset/reload, return failed.
3045 * This will force the mid-layer to eventually call
3046 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3047 * reset to complete
3048 */
3049 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3050
3051 if (pinstance->ioa_reset_in_progress ||
3052 pinstance->ioa_state == IOA_STATE_DEAD) {
3053 spin_unlock_irqrestore(pinstance->host->host_lock,
3054 host_lock_flags);
3055 return rc;
3056 }
3057
3058 /* loop over pending cmd list to find cmd corresponding to this
3059 * scsi_cmd. Note that this command might not have been completed
3060 * already. locking: all pending commands are protected with
3061 * pending_pool_lock.
3062 */
3063 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3064 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3065
3066 if (cmd->scsi_cmd == scsi_cmd) {
3067 cmd_found = 1;
3068 break;
3069 }
3070 }
3071
3072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3073 pending_lock_flags);
3074
3075 /* If the command to be aborted was given to IOA and still pending with
3076 * it, send ABORT_TASK to abort this and wait for its completion
3077 */
3078 if (cmd_found)
3079 cancel_cmd = pmcraid_abort_cmd(cmd);
3080
3081 spin_unlock_irqrestore(pinstance->host->host_lock,
3082 host_lock_flags);
3083
3084 if (cancel_cmd) {
3085 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
3086 rc = pmcraid_abort_complete(cancel_cmd);
3087 }
3088
3089 return cmd_found ? rc : SUCCESS;
3090}
3091
3092/**
3093 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3094 *
3095 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3096 *
3097 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3098 * Since these are called from mid-layer EH thread, no other IO will be queued
3099 * to the resource being reset. However, control path (IOCTL) may be active so
3100 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3101 * takes care by locking/unlocking host_lock.
3102 *
3103 * Return value
3104 * SUCCESS or FAILED
3105 */
3106static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3107{
3108 scmd_printk(KERN_INFO, scmd,
3109 "resetting device due to an I/O command timeout.\n");
3110 return pmcraid_reset_device(scmd,
3111 PMCRAID_INTERNAL_TIMEOUT,
3112 RESET_DEVICE_LUN);
3113}
3114
3115static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3116{
3117 scmd_printk(KERN_INFO, scmd,
3118 "Doing bus reset due to an I/O command timeout.\n");
3119 return pmcraid_reset_device(scmd,
3120 PMCRAID_RESET_BUS_TIMEOUT,
3121 RESET_DEVICE_BUS);
3122}
3123
3124static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3125{
3126 scmd_printk(KERN_INFO, scmd,
3127 "Doing target reset due to an I/O command timeout.\n");
3128 return pmcraid_reset_device(scmd,
3129 PMCRAID_INTERNAL_TIMEOUT,
3130 RESET_DEVICE_TARGET);
3131}
3132
3133/**
3134 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3135 *
3136 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3137 *
3138 * Initiates adapter reset to bring it up to operational state
3139 *
3140 * Return value
3141 * SUCCESS or FAILED
3142 */
3143static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3144{
3145 unsigned long interval = 10000; /* 10 seconds interval */
3146 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3147 struct pmcraid_instance *pinstance =
3148 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3149
3150
3151 /* wait for an additional 150 seconds just in case firmware could come
3152 * up and if it could complete all the pending commands excluding the
3153 * two HCAM (CCN and LDN).
3154 */
3155 while (waits--) {
3156 if (atomic_read(&pinstance->outstanding_cmds) <=
3157 PMCRAID_MAX_HCAM_CMD)
3158 return SUCCESS;
3159 msleep(interval);
3160 }
3161
3162 dev_err(&pinstance->pdev->dev,
3163 "Adapter being reset due to an I/O command timeout.\n");
3164 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3165}
3166
3167/**
3168 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3169 * @scsi_cmd: scsi command struct
3170 *
3171 * Return value
3172 * number of tags or 0 if the task is not tagged
3173 */
3174static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3175{
3176 char tag[2];
3177 u8 rc = 0;
3178
3179 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3180 switch (tag[0]) {
3181 case MSG_SIMPLE_TAG:
3182 rc = TASK_TAG_SIMPLE;
3183 break;
3184 case MSG_HEAD_TAG:
3185 rc = TASK_TAG_QUEUE_HEAD;
3186 break;
3187 case MSG_ORDERED_TAG:
3188 rc = TASK_TAG_ORDERED;
3189 break;
3190 };
3191 }
3192
3193 return rc;
3194}
3195
3196
3197/**
3198 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3199 * @cmd: pmcraid command struct
3200 * @sgcount: count of scatter-gather elements
3201 *
3202 * Return value
3203 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3204 * or external IOADLs
3205 */
3206struct pmcraid_ioadl_desc *
3207pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3208{
3209 struct pmcraid_ioadl_desc *ioadl;
3210 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3211 int ioadl_count = 0;
3212
3213 if (ioarcb->add_cmd_param_length)
3214 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3215 ioarcb->ioadl_length =
3216 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3217
3218 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3219 /* external ioadls start at offset 0x80 from control_block
3220 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3221 * It is necessary to indicate to firmware that driver is
3222 * using ioadls to be treated as external to IOARCB.
3223 */
3224 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3225 ioarcb->ioadl_bus_addr =
3226 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3227 offsetof(struct pmcraid_ioarcb,
3228 add_data.u.ioadl[3]));
3229 ioadl = &ioarcb->add_data.u.ioadl[3];
3230 } else {
3231 ioarcb->ioadl_bus_addr =
3232 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3233 offsetof(struct pmcraid_ioarcb,
3234 add_data.u.ioadl[ioadl_count]));
3235
3236 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3237 ioarcb->ioarcb_bus_addr |=
3238 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3239 }
3240
3241 return ioadl;
3242}
3243
3244/**
3245 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3246 * @pinstance: pointer to adapter instance structure
3247 * @cmd: pmcraid command struct
3248 *
3249 * This function is invoked by queuecommand entry point while sending a command
3250 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3251 *
3252 * Return value:
3253 * 0 on success or -1 on failure
3254 */
3255static int pmcraid_build_ioadl(
3256 struct pmcraid_instance *pinstance,
3257 struct pmcraid_cmd *cmd
3258)
3259{
3260 int i, nseg;
3261 struct scatterlist *sglist;
3262
3263 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3264 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3265 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3266
3267 u32 length = scsi_bufflen(scsi_cmd);
3268
3269 if (!length)
3270 return 0;
3271
3272 nseg = scsi_dma_map(scsi_cmd);
3273
3274 if (nseg < 0) {
3275 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3276 return -1;
3277 } else if (nseg > PMCRAID_MAX_IOADLS) {
3278 scsi_dma_unmap(scsi_cmd);
3279 scmd_printk(KERN_ERR, scsi_cmd,
3280 "sg count is (%d) more than allowed!\n", nseg);
3281 return -1;
3282 }
3283
3284 /* Initialize IOARCB data transfer length fields */
3285 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3286 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3287
3288 ioarcb->request_flags0 |= NO_LINK_DESCS;
3289 ioarcb->data_transfer_length = cpu_to_le32(length);
3290 ioadl = pmcraid_init_ioadls(cmd, nseg);
3291
3292 /* Initialize IOADL descriptor addresses */
3293 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3294 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3295 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3296 ioadl[i].flags = 0;
3297 }
3298 /* setup last descriptor */
3299 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3300
3301 return 0;
3302}
3303
3304/**
3305 * pmcraid_free_sglist - Frees an allocated SG buffer list
3306 * @sglist: scatter/gather list pointer
3307 *
3308 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3309 *
3310 * Return value:
3311 * none
3312 */
3313static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3314{
3315 int i;
3316
3317 for (i = 0; i < sglist->num_sg; i++)
3318 __free_pages(sg_page(&(sglist->scatterlist[i])),
3319 sglist->order);
3320
3321 kfree(sglist);
3322}
3323
3324/**
3325 * pmcraid_alloc_sglist - Allocates memory for a SG list
3326 * @buflen: buffer length
3327 *
3328 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3329 * list.
3330 *
3331 * Return value
3332 * pointer to sglist / NULL on failure
3333 */
3334static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3335{
3336 struct pmcraid_sglist *sglist;
3337 struct scatterlist *scatterlist;
3338 struct page *page;
3339 int num_elem, i, j;
3340 int sg_size;
3341 int order;
3342 int bsize_elem;
3343
3344 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3345 order = (sg_size > 0) ? get_order(sg_size) : 0;
3346 bsize_elem = PAGE_SIZE * (1 << order);
3347
3348 /* Determine the actual number of sg entries needed */
3349 if (buflen % bsize_elem)
3350 num_elem = (buflen / bsize_elem) + 1;
3351 else
3352 num_elem = buflen / bsize_elem;
3353
3354 /* Allocate a scatter/gather list for the DMA */
3355 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3356 (sizeof(struct scatterlist) * (num_elem - 1)),
3357 GFP_KERNEL);
3358
3359 if (sglist == NULL)
3360 return NULL;
3361
3362 scatterlist = sglist->scatterlist;
3363 sg_init_table(scatterlist, num_elem);
3364 sglist->order = order;
3365 sglist->num_sg = num_elem;
3366 sg_size = buflen;
3367
3368 for (i = 0; i < num_elem; i++) {
3369 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
3370 if (!page) {
3371 for (j = i - 1; j >= 0; j--)
3372 __free_pages(sg_page(&scatterlist[j]), order);
3373 kfree(sglist);
3374 return NULL;
3375 }
3376
3377 sg_set_page(&scatterlist[i], page,
3378 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3379 sg_size -= bsize_elem;
3380 }
3381
3382 return sglist;
3383}
3384
3385/**
3386 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3387 * @sglist: scatter/gather list pointer
3388 * @buffer: buffer pointer
3389 * @len: buffer length
3390 * @direction: data transfer direction
3391 *
3392 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3393 *
3394 * Return value:
3395 * 0 on success / other on failure
3396 */
3397static int pmcraid_copy_sglist(
3398 struct pmcraid_sglist *sglist,
3399 unsigned long buffer,
3400 u32 len,
3401 int direction
3402)
3403{
3404 struct scatterlist *scatterlist;
3405 void *kaddr;
3406 int bsize_elem;
3407 int i;
3408 int rc = 0;
3409
3410 /* Determine the actual number of bytes per element */
3411 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3412
3413 scatterlist = sglist->scatterlist;
3414
3415 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3416 struct page *page = sg_page(&scatterlist[i]);
3417
3418 kaddr = kmap(page);
3419 if (direction == DMA_TO_DEVICE)
3420 rc = __copy_from_user(kaddr,
3421 (void *)buffer,
3422 bsize_elem);
3423 else
3424 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3425
3426 kunmap(page);
3427
3428 if (rc) {
3429 pmcraid_err("failed to copy user data into sg list\n");
3430 return -EFAULT;
3431 }
3432
3433 scatterlist[i].length = bsize_elem;
3434 }
3435
3436 if (len % bsize_elem) {
3437 struct page *page = sg_page(&scatterlist[i]);
3438
3439 kaddr = kmap(page);
3440
3441 if (direction == DMA_TO_DEVICE)
3442 rc = __copy_from_user(kaddr,
3443 (void *)buffer,
3444 len % bsize_elem);
3445 else
3446 rc = __copy_to_user((void *)buffer,
3447 kaddr,
3448 len % bsize_elem);
3449
3450 kunmap(page);
3451
3452 scatterlist[i].length = len % bsize_elem;
3453 }
3454
3455 if (rc) {
3456 pmcraid_err("failed to copy user data into sg list\n");
3457 rc = -EFAULT;
3458 }
3459
3460 return rc;
3461}
3462
3463/**
3464 * pmcraid_queuecommand - Queue a mid-layer request
3465 * @scsi_cmd: scsi command struct
3466 * @done: done function
3467 *
3468 * This function queues a request generated by the mid-layer. Midlayer calls
3469 * this routine within host->lock. Some of the functions called by queuecommand
3470 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3471 *
3472 * Return value:
3473 * 0 on success
3474 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3475 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3476 */
3477static int pmcraid_queuecommand_lck(
3478 struct scsi_cmnd *scsi_cmd,
3479 void (*done) (struct scsi_cmnd *)
3480)
3481{
3482 struct pmcraid_instance *pinstance;
3483 struct pmcraid_resource_entry *res;
3484 struct pmcraid_ioarcb *ioarcb;
3485 struct pmcraid_cmd *cmd;
3486 u32 fw_version;
3487 int rc = 0;
3488
3489 pinstance =
3490 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3491 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3492 scsi_cmd->scsi_done = done;
3493 res = scsi_cmd->device->hostdata;
3494 scsi_cmd->result = (DID_OK << 16);
3495
3496 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3497 * the command
3498 */
3499 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3500 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3501 scsi_cmd->result = (DID_NO_CONNECT << 16);
3502 scsi_cmd->scsi_done(scsi_cmd);
3503 return 0;
3504 }
3505
3506 /* If IOA reset is in progress, can't queue the commands */
3507 if (pinstance->ioa_reset_in_progress)
3508 return SCSI_MLQUEUE_HOST_BUSY;
3509
3510 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3511 * the command here itself with success return
3512 */
3513 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3514 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3515 scsi_cmd->scsi_done(scsi_cmd);
3516 return 0;
3517 }
3518
3519 /* initialize the command and IOARCB to be sent to IOA */
3520 cmd = pmcraid_get_free_cmd(pinstance);
3521
3522 if (cmd == NULL) {
3523 pmcraid_err("free command block is not available\n");
3524 return SCSI_MLQUEUE_HOST_BUSY;
3525 }
3526
3527 cmd->scsi_cmd = scsi_cmd;
3528 ioarcb = &(cmd->ioa_cb->ioarcb);
3529 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3530 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3531 ioarcb->request_type = REQ_TYPE_SCSI;
3532
3533 /* set hrrq number where the IOA should respond to. Note that all cmds
3534 * generated internally uses hrrq_id 0, exception to this is the cmd
3535 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3536 * hrrq_id assigned here in queuecommand
3537 */
3538 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3539 pinstance->num_hrrq;
3540 cmd->cmd_done = pmcraid_io_done;
3541
3542 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3543 if (scsi_cmd->underflow == 0)
3544 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3545
3546 if (res->sync_reqd) {
3547 ioarcb->request_flags0 |= SYNC_COMPLETE;
3548 res->sync_reqd = 0;
3549 }
3550
3551 ioarcb->request_flags0 |= NO_LINK_DESCS;
3552 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3553
3554 if (RES_IS_GSCSI(res->cfg_entry))
3555 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3556 }
3557
3558 rc = pmcraid_build_ioadl(pinstance, cmd);
3559
3560 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3561 le32_to_cpu(ioarcb->response_handle) >> 2,
3562 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3563 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3564 PMCRAID_PHYS_BUS_ID,
3565 RES_IS_VSET(res->cfg_entry) ?
3566 (fw_version <= PMCRAID_FW_VERSION_1 ?
3567 res->cfg_entry.unique_flags1 :
3568 res->cfg_entry.array_id & 0xFF) :
3569 RES_TARGET(res->cfg_entry.resource_address),
3570 RES_LUN(res->cfg_entry.resource_address));
3571
3572 if (likely(rc == 0)) {
3573 _pmcraid_fire_command(cmd);
3574 } else {
3575 pmcraid_err("queuecommand could not build ioadl\n");
3576 pmcraid_return_cmd(cmd);
3577 rc = SCSI_MLQUEUE_HOST_BUSY;
3578 }
3579
3580 return rc;
3581}
3582
3583static DEF_SCSI_QCMD(pmcraid_queuecommand)
3584
3585/**
3586 * pmcraid_open -char node "open" entry, allowed only users with admin access
3587 */
3588static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3589{
3590 struct pmcraid_instance *pinstance;
3591
3592 if (!capable(CAP_SYS_ADMIN))
3593 return -EACCES;
3594
3595 /* Populate adapter instance * pointer for use by ioctl */
3596 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3597 filep->private_data = pinstance;
3598
3599 return 0;
3600}
3601
3602/**
3603 * pmcraid_release - char node "release" entry point
3604 */
3605static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3606{
3607 struct pmcraid_instance *pinstance = filep->private_data;
3608
3609 filep->private_data = NULL;
3610 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3611
3612 return 0;
3613}
3614
3615/**
3616 * pmcraid_fasync - Async notifier registration from applications
3617 *
3618 * This function adds the calling process to a driver global queue. When an
3619 * event occurs, SIGIO will be sent to all processes in this queue.
3620 */
3621static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3622{
3623 struct pmcraid_instance *pinstance;
3624 int rc;
3625
3626 pinstance = filep->private_data;
3627 mutex_lock(&pinstance->aen_queue_lock);
3628 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3629 mutex_unlock(&pinstance->aen_queue_lock);
3630
3631 return rc;
3632}
3633
3634
3635/**
3636 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3637 * commands sent over IOCTL interface
3638 *
3639 * @cmd : pointer to struct pmcraid_cmd
3640 * @buflen : length of the request buffer
3641 * @direction : data transfer direction
3642 *
3643 * Return value
3644 * 0 on success, non-zero error code on failure
3645 */
3646static int pmcraid_build_passthrough_ioadls(
3647 struct pmcraid_cmd *cmd,
3648 int buflen,
3649 int direction
3650)
3651{
3652 struct pmcraid_sglist *sglist = NULL;
3653 struct scatterlist *sg = NULL;
3654 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3655 struct pmcraid_ioadl_desc *ioadl;
3656 int i;
3657
3658 sglist = pmcraid_alloc_sglist(buflen);
3659
3660 if (!sglist) {
3661 pmcraid_err("can't allocate memory for passthrough SGls\n");
3662 return -ENOMEM;
3663 }
3664
3665 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3666 sglist->scatterlist,
3667 sglist->num_sg, direction);
3668
3669 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3670 dev_err(&cmd->drv_inst->pdev->dev,
3671 "Failed to map passthrough buffer!\n");
3672 pmcraid_free_sglist(sglist);
3673 return -EIO;
3674 }
3675
3676 cmd->sglist = sglist;
3677 ioarcb->request_flags0 |= NO_LINK_DESCS;
3678
3679 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3680
3681 /* Initialize IOADL descriptor addresses */
3682 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3683 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3684 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3685 ioadl[i].flags = 0;
3686 }
3687
3688 /* setup the last descriptor */
3689 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3690
3691 return 0;
3692}
3693
3694
3695/**
3696 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3697 *
3698 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3699 * @buflen: size of the request buffer
3700 * @direction: data transfer direction
3701 *
3702 * Return value
3703 * 0 on success, non-zero error code on failure
3704 */
3705static void pmcraid_release_passthrough_ioadls(
3706 struct pmcraid_cmd *cmd,
3707 int buflen,
3708 int direction
3709)
3710{
3711 struct pmcraid_sglist *sglist = cmd->sglist;
3712
3713 if (buflen > 0) {
3714 pci_unmap_sg(cmd->drv_inst->pdev,
3715 sglist->scatterlist,
3716 sglist->num_sg,
3717 direction);
3718 pmcraid_free_sglist(sglist);
3719 cmd->sglist = NULL;
3720 }
3721}
3722
3723/**
3724 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3725 *
3726 * @pinstance: pointer to adapter instance structure
3727 * @cmd: ioctl code
3728 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3729 *
3730 * Return value
3731 * 0 on success, non-zero error code on failure
3732 */
3733static long pmcraid_ioctl_passthrough(
3734 struct pmcraid_instance *pinstance,
3735 unsigned int ioctl_cmd,
3736 unsigned int buflen,
3737 unsigned long arg
3738)
3739{
3740 struct pmcraid_passthrough_ioctl_buffer *buffer;
3741 struct pmcraid_ioarcb *ioarcb;
3742 struct pmcraid_cmd *cmd;
3743 struct pmcraid_cmd *cancel_cmd;
3744 unsigned long request_buffer;
3745 unsigned long request_offset;
3746 unsigned long lock_flags;
3747 void *ioasa;
3748 u32 ioasc;
3749 int request_size;
3750 int buffer_size;
3751 u8 access, direction;
3752 int rc = 0;
3753
3754 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3755 if (pinstance->ioa_reset_in_progress) {
3756 rc = wait_event_interruptible_timeout(
3757 pinstance->reset_wait_q,
3758 !pinstance->ioa_reset_in_progress,
3759 msecs_to_jiffies(10000));
3760
3761 if (!rc)
3762 return -ETIMEDOUT;
3763 else if (rc < 0)
3764 return -ERESTARTSYS;
3765 }
3766
3767 /* If adapter is not in operational state, return error */
3768 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3769 pmcraid_err("IOA is not operational\n");
3770 return -ENOTTY;
3771 }
3772
3773 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3774 buffer = kmalloc(buffer_size, GFP_KERNEL);
3775
3776 if (!buffer) {
3777 pmcraid_err("no memory for passthrough buffer\n");
3778 return -ENOMEM;
3779 }
3780
3781 request_offset =
3782 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3783
3784 request_buffer = arg + request_offset;
3785
3786 rc = __copy_from_user(buffer,
3787 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3788 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3789
3790 ioasa =
3791 (void *)(arg +
3792 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3793
3794 if (rc) {
3795 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3796 rc = -EFAULT;
3797 goto out_free_buffer;
3798 }
3799
3800 request_size = buffer->ioarcb.data_transfer_length;
3801
3802 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3803 access = VERIFY_READ;
3804 direction = DMA_TO_DEVICE;
3805 } else {
3806 access = VERIFY_WRITE;
3807 direction = DMA_FROM_DEVICE;
3808 }
3809
3810 if (request_size > 0) {
3811 rc = access_ok(access, arg, request_offset + request_size);
3812
3813 if (!rc) {
3814 rc = -EFAULT;
3815 goto out_free_buffer;
3816 }
3817 } else if (request_size < 0) {
3818 rc = -EINVAL;
3819 goto out_free_buffer;
3820 }
3821
3822 /* check if we have any additional command parameters */
3823 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3824 rc = -EINVAL;
3825 goto out_free_buffer;
3826 }
3827
3828 cmd = pmcraid_get_free_cmd(pinstance);
3829
3830 if (!cmd) {
3831 pmcraid_err("free command block is not available\n");
3832 rc = -ENOMEM;
3833 goto out_free_buffer;
3834 }
3835
3836 cmd->scsi_cmd = NULL;
3837 ioarcb = &(cmd->ioa_cb->ioarcb);
3838
3839 /* Copy the user-provided IOARCB stuff field by field */
3840 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3841 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3842 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3843 ioarcb->request_type = buffer->ioarcb.request_type;
3844 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3845 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3846 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3847
3848 if (buffer->ioarcb.add_cmd_param_length) {
3849 ioarcb->add_cmd_param_length =
3850 buffer->ioarcb.add_cmd_param_length;
3851 ioarcb->add_cmd_param_offset =
3852 buffer->ioarcb.add_cmd_param_offset;
3853 memcpy(ioarcb->add_data.u.add_cmd_params,
3854 buffer->ioarcb.add_data.u.add_cmd_params,
3855 buffer->ioarcb.add_cmd_param_length);
3856 }
3857
3858 /* set hrrq number where the IOA should respond to. Note that all cmds
3859 * generated internally uses hrrq_id 0, exception to this is the cmd
3860 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3861 * hrrq_id assigned here in queuecommand
3862 */
3863 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3864 pinstance->num_hrrq;
3865
3866 if (request_size) {
3867 rc = pmcraid_build_passthrough_ioadls(cmd,
3868 request_size,
3869 direction);
3870 if (rc) {
3871 pmcraid_err("couldn't build passthrough ioadls\n");
3872 goto out_free_buffer;
3873 }
3874 } else if (request_size < 0) {
3875 rc = -EINVAL;
3876 goto out_free_buffer;
3877 }
3878
3879 /* If data is being written into the device, copy the data from user
3880 * buffers
3881 */
3882 if (direction == DMA_TO_DEVICE && request_size > 0) {
3883 rc = pmcraid_copy_sglist(cmd->sglist,
3884 request_buffer,
3885 request_size,
3886 direction);
3887 if (rc) {
3888 pmcraid_err("failed to copy user buffer\n");
3889 goto out_free_sglist;
3890 }
3891 }
3892
3893 /* passthrough ioctl is a blocking command so, put the user to sleep
3894 * until timeout. Note that a timeout value of 0 means, do timeout.
3895 */
3896 cmd->cmd_done = pmcraid_internal_done;
3897 init_completion(&cmd->wait_for_completion);
3898 cmd->completion_req = 1;
3899
3900 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3901 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3902 cmd->ioa_cb->ioarcb.cdb[0],
3903 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3904
3905 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3906 _pmcraid_fire_command(cmd);
3907 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3908
3909 /* NOTE ! Remove the below line once abort_task is implemented
3910 * in firmware. This line disables ioctl command timeout handling logic
3911 * similar to IO command timeout handling, making ioctl commands to wait
3912 * until the command completion regardless of timeout value specified in
3913 * ioarcb
3914 */
3915 buffer->ioarcb.cmd_timeout = 0;
3916
3917 /* If command timeout is specified put caller to wait till that time,
3918 * otherwise it would be blocking wait. If command gets timed out, it
3919 * will be aborted.
3920 */
3921 if (buffer->ioarcb.cmd_timeout == 0) {
3922 wait_for_completion(&cmd->wait_for_completion);
3923 } else if (!wait_for_completion_timeout(
3924 &cmd->wait_for_completion,
3925 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3926
3927 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3928 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3929 cmd->ioa_cb->ioarcb.cdb[0]);
3930
3931 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3932 cancel_cmd = pmcraid_abort_cmd(cmd);
3933 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3934
3935 if (cancel_cmd) {
3936 wait_for_completion(&cancel_cmd->wait_for_completion);
3937 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
3938 pmcraid_return_cmd(cancel_cmd);
3939
3940 /* if abort task couldn't find the command i.e it got
3941 * completed prior to aborting, return good completion.
3942 * if command got aborted successfully or there was IOA
3943 * reset due to abort task itself getting timedout then
3944 * return -ETIMEDOUT
3945 */
3946 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3947 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3948 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3949 rc = -ETIMEDOUT;
3950 goto out_handle_response;
3951 }
3952 }
3953
3954 /* no command block for abort task or abort task failed to abort
3955 * the IOARCB, then wait for 150 more seconds and initiate reset
3956 * sequence after timeout
3957 */
3958 if (!wait_for_completion_timeout(
3959 &cmd->wait_for_completion,
3960 msecs_to_jiffies(150 * 1000))) {
3961 pmcraid_reset_bringup(cmd->drv_inst);
3962 rc = -ETIMEDOUT;
3963 }
3964 }
3965
3966out_handle_response:
3967 /* copy entire IOASA buffer and return IOCTL success.
3968 * If copying IOASA to user-buffer fails, return
3969 * EFAULT
3970 */
3971 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3972 sizeof(struct pmcraid_ioasa))) {
3973 pmcraid_err("failed to copy ioasa buffer to user\n");
3974 rc = -EFAULT;
3975 }
3976
3977 /* If the data transfer was from device, copy the data onto user
3978 * buffers
3979 */
3980 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3981 rc = pmcraid_copy_sglist(cmd->sglist,
3982 request_buffer,
3983 request_size,
3984 direction);
3985 if (rc) {
3986 pmcraid_err("failed to copy user buffer\n");
3987 rc = -EFAULT;
3988 }
3989 }
3990
3991out_free_sglist:
3992 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3993 pmcraid_return_cmd(cmd);
3994
3995out_free_buffer:
3996 kfree(buffer);
3997
3998 return rc;
3999}
4000
4001
4002
4003
4004/**
4005 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
4006 *
4007 * @pinstance: pointer to adapter instance structure
4008 * @cmd: ioctl command passed in
4009 * @buflen: length of user_buffer
4010 * @user_buffer: user buffer pointer
4011 *
4012 * Return Value
4013 * 0 in case of success, otherwise appropriate error code
4014 */
4015static long pmcraid_ioctl_driver(
4016 struct pmcraid_instance *pinstance,
4017 unsigned int cmd,
4018 unsigned int buflen,
4019 void __user *user_buffer
4020)
4021{
4022 int rc = -ENOSYS;
4023
4024 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
4025 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4026 return -EFAULT;
4027 }
4028
4029 switch (cmd) {
4030 case PMCRAID_IOCTL_RESET_ADAPTER:
4031 pmcraid_reset_bringup(pinstance);
4032 rc = 0;
4033 break;
4034
4035 default:
4036 break;
4037 }
4038
4039 return rc;
4040}
4041
4042/**
4043 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4044 *
4045 * @cmd: ioctl command
4046 * @arg: user buffer
4047 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4048 *
4049 * Return Value
4050 * negetive error code if there are access issues, otherwise zero.
4051 * Upon success, returns ioctl header copied out of user buffer.
4052 */
4053
4054static int pmcraid_check_ioctl_buffer(
4055 int cmd,
4056 void __user *arg,
4057 struct pmcraid_ioctl_header *hdr
4058)
4059{
4060 int rc = 0;
4061 int access = VERIFY_READ;
4062
4063 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4064 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4065 return -EFAULT;
4066 }
4067
4068 /* check for valid driver signature */
4069 rc = memcmp(hdr->signature,
4070 PMCRAID_IOCTL_SIGNATURE,
4071 sizeof(hdr->signature));
4072 if (rc) {
4073 pmcraid_err("signature verification failed\n");
4074 return -EINVAL;
4075 }
4076
4077 /* check for appropriate buffer access */
4078 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4079 access = VERIFY_WRITE;
4080
4081 rc = access_ok(access,
4082 (arg + sizeof(struct pmcraid_ioctl_header)),
4083 hdr->buffer_length);
4084 if (!rc) {
4085 pmcraid_err("access failed for user buffer of size %d\n",
4086 hdr->buffer_length);
4087 return -EFAULT;
4088 }
4089
4090 return 0;
4091}
4092
4093/**
4094 * pmcraid_ioctl - char node ioctl entry point
4095 */
4096static long pmcraid_chr_ioctl(
4097 struct file *filep,
4098 unsigned int cmd,
4099 unsigned long arg
4100)
4101{
4102 struct pmcraid_instance *pinstance = NULL;
4103 struct pmcraid_ioctl_header *hdr = NULL;
4104 int retval = -ENOTTY;
4105
4106 hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
4107
4108 if (!hdr) {
4109 pmcraid_err("faile to allocate memory for ioctl header\n");
4110 return -ENOMEM;
4111 }
4112
4113 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4114
4115 if (retval) {
4116 pmcraid_info("chr_ioctl: header check failed\n");
4117 kfree(hdr);
4118 return retval;
4119 }
4120
4121 pinstance = filep->private_data;
4122
4123 if (!pinstance) {
4124 pmcraid_info("adapter instance is not found\n");
4125 kfree(hdr);
4126 return -ENOTTY;
4127 }
4128
4129 switch (_IOC_TYPE(cmd)) {
4130
4131 case PMCRAID_PASSTHROUGH_IOCTL:
4132 /* If ioctl code is to download microcode, we need to block
4133 * mid-layer requests.
4134 */
4135 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4136 scsi_block_requests(pinstance->host);
4137
4138 retval = pmcraid_ioctl_passthrough(pinstance,
4139 cmd,
4140 hdr->buffer_length,
4141 arg);
4142
4143 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4144 scsi_unblock_requests(pinstance->host);
4145 break;
4146
4147 case PMCRAID_DRIVER_IOCTL:
4148 arg += sizeof(struct pmcraid_ioctl_header);
4149 retval = pmcraid_ioctl_driver(pinstance,
4150 cmd,
4151 hdr->buffer_length,
4152 (void __user *)arg);
4153 break;
4154
4155 default:
4156 retval = -ENOTTY;
4157 break;
4158 }
4159
4160 kfree(hdr);
4161
4162 return retval;
4163}
4164
4165/**
4166 * File operations structure for management interface
4167 */
4168static const struct file_operations pmcraid_fops = {
4169 .owner = THIS_MODULE,
4170 .open = pmcraid_chr_open,
4171 .release = pmcraid_chr_release,
4172 .fasync = pmcraid_chr_fasync,
4173 .unlocked_ioctl = pmcraid_chr_ioctl,
4174#ifdef CONFIG_COMPAT
4175 .compat_ioctl = pmcraid_chr_ioctl,
4176#endif
4177 .llseek = noop_llseek,
4178};
4179
4180
4181
4182
4183/**
4184 * pmcraid_show_log_level - Display adapter's error logging level
4185 * @dev: class device struct
4186 * @buf: buffer
4187 *
4188 * Return value:
4189 * number of bytes printed to buffer
4190 */
4191static ssize_t pmcraid_show_log_level(
4192 struct device *dev,
4193 struct device_attribute *attr,
4194 char *buf)
4195{
4196 struct Scsi_Host *shost = class_to_shost(dev);
4197 struct pmcraid_instance *pinstance =
4198 (struct pmcraid_instance *)shost->hostdata;
4199 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4200}
4201
4202/**
4203 * pmcraid_store_log_level - Change the adapter's error logging level
4204 * @dev: class device struct
4205 * @buf: buffer
4206 * @count: not used
4207 *
4208 * Return value:
4209 * number of bytes printed to buffer
4210 */
4211static ssize_t pmcraid_store_log_level(
4212 struct device *dev,
4213 struct device_attribute *attr,
4214 const char *buf,
4215 size_t count
4216)
4217{
4218 struct Scsi_Host *shost;
4219 struct pmcraid_instance *pinstance;
4220 unsigned long val;
4221
4222 if (strict_strtoul(buf, 10, &val))
4223 return -EINVAL;
4224 /* log-level should be from 0 to 2 */
4225 if (val > 2)
4226 return -EINVAL;
4227
4228 shost = class_to_shost(dev);
4229 pinstance = (struct pmcraid_instance *)shost->hostdata;
4230 pinstance->current_log_level = val;
4231
4232 return strlen(buf);
4233}
4234
4235static struct device_attribute pmcraid_log_level_attr = {
4236 .attr = {
4237 .name = "log_level",
4238 .mode = S_IRUGO | S_IWUSR,
4239 },
4240 .show = pmcraid_show_log_level,
4241 .store = pmcraid_store_log_level,
4242};
4243
4244/**
4245 * pmcraid_show_drv_version - Display driver version
4246 * @dev: class device struct
4247 * @buf: buffer
4248 *
4249 * Return value:
4250 * number of bytes printed to buffer
4251 */
4252static ssize_t pmcraid_show_drv_version(
4253 struct device *dev,
4254 struct device_attribute *attr,
4255 char *buf
4256)
4257{
4258 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4259 PMCRAID_DRIVER_VERSION);
4260}
4261
4262static struct device_attribute pmcraid_driver_version_attr = {
4263 .attr = {
4264 .name = "drv_version",
4265 .mode = S_IRUGO,
4266 },
4267 .show = pmcraid_show_drv_version,
4268};
4269
4270/**
4271 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4272 * @dev: class device struct
4273 * @buf: buffer
4274 *
4275 * Return value:
4276 * number of bytes printed to buffer
4277 */
4278static ssize_t pmcraid_show_adapter_id(
4279 struct device *dev,
4280 struct device_attribute *attr,
4281 char *buf
4282)
4283{
4284 struct Scsi_Host *shost = class_to_shost(dev);
4285 struct pmcraid_instance *pinstance =
4286 (struct pmcraid_instance *)shost->hostdata;
4287 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4288 pinstance->pdev->devfn;
4289 u32 aen_group = pmcraid_event_family.id;
4290
4291 return snprintf(buf, PAGE_SIZE,
4292 "adapter id: %d\nminor: %d\naen group: %d\n",
4293 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4294}
4295
4296static struct device_attribute pmcraid_adapter_id_attr = {
4297 .attr = {
4298 .name = "adapter_id",
4299 .mode = S_IRUGO | S_IWUSR,
4300 },
4301 .show = pmcraid_show_adapter_id,
4302};
4303
4304static struct device_attribute *pmcraid_host_attrs[] = {
4305 &pmcraid_log_level_attr,
4306 &pmcraid_driver_version_attr,
4307 &pmcraid_adapter_id_attr,
4308 NULL,
4309};
4310
4311
4312/* host template structure for pmcraid driver */
4313static struct scsi_host_template pmcraid_host_template = {
4314 .module = THIS_MODULE,
4315 .name = PMCRAID_DRIVER_NAME,
4316 .queuecommand = pmcraid_queuecommand,
4317 .eh_abort_handler = pmcraid_eh_abort_handler,
4318 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4319 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4320 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4321 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4322
4323 .slave_alloc = pmcraid_slave_alloc,
4324 .slave_configure = pmcraid_slave_configure,
4325 .slave_destroy = pmcraid_slave_destroy,
4326 .change_queue_depth = pmcraid_change_queue_depth,
4327 .change_queue_type = pmcraid_change_queue_type,
4328 .can_queue = PMCRAID_MAX_IO_CMD,
4329 .this_id = -1,
4330 .sg_tablesize = PMCRAID_MAX_IOADLS,
4331 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4332 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4333 .use_clustering = ENABLE_CLUSTERING,
4334 .shost_attrs = pmcraid_host_attrs,
4335 .proc_name = PMCRAID_DRIVER_NAME
4336};
4337
4338/*
4339 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4340 * @irq: interrupt vector number
4341 * @dev_id: pointer hrrq_vector
4342 *
4343 * Return Value
4344 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4345 */
4346
4347static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4348{
4349 struct pmcraid_isr_param *hrrq_vector;
4350 struct pmcraid_instance *pinstance;
4351 unsigned long lock_flags;
4352 u32 intrs_val;
4353 int hrrq_id;
4354
4355 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4356 hrrq_id = hrrq_vector->hrrq_id;
4357 pinstance = hrrq_vector->drv_inst;
4358
4359 if (!hrrq_id) {
4360 /* Read the interrupt */
4361 intrs_val = pmcraid_read_interrupts(pinstance);
4362 if (intrs_val &&
4363 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4364 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4365 /* Any error interrupts including unit_check,
4366 * initiate IOA reset.In case of unit check indicate
4367 * to reset_sequence that IOA unit checked and prepare
4368 * for a dump during reset sequence
4369 */
4370 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4371 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4372 pinstance->ioa_unit_check = 1;
4373
4374 pmcraid_err("ISR: error interrupts: %x \
4375 initiating reset\n", intrs_val);
4376 spin_lock_irqsave(pinstance->host->host_lock,
4377 lock_flags);
4378 pmcraid_initiate_reset(pinstance);
4379 spin_unlock_irqrestore(
4380 pinstance->host->host_lock,
4381 lock_flags);
4382 }
4383 /* If interrupt was as part of the ioa initialization,
4384 * clear it. Delete the timer and wakeup the
4385 * reset engine to proceed with reset sequence
4386 */
4387 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4388 pmcraid_clr_trans_op(pinstance);
4389
4390 /* Clear the interrupt register by writing
4391 * to host to ioa doorbell. Once done
4392 * FW will clear the interrupt.
4393 */
4394 iowrite32(DOORBELL_INTR_MSIX_CLR,
4395 pinstance->int_regs.host_ioa_interrupt_reg);
4396 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4397
4398
4399 }
4400 }
4401
4402 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4403
4404 return IRQ_HANDLED;
4405}
4406
4407/**
4408 * pmcraid_isr - implements legacy interrupt handling routine
4409 *
4410 * @irq: interrupt vector number
4411 * @dev_id: pointer hrrq_vector
4412 *
4413 * Return Value
4414 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4415 */
4416static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4417{
4418 struct pmcraid_isr_param *hrrq_vector;
4419 struct pmcraid_instance *pinstance;
4420 u32 intrs;
4421 unsigned long lock_flags;
4422 int hrrq_id = 0;
4423
4424 /* In case of legacy interrupt mode where interrupts are shared across
4425 * isrs, it may be possible that the current interrupt is not from IOA
4426 */
4427 if (!dev_id) {
4428 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4429 return IRQ_NONE;
4430 }
4431 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4432 pinstance = hrrq_vector->drv_inst;
4433
4434 intrs = pmcraid_read_interrupts(pinstance);
4435
4436 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4437 return IRQ_NONE;
4438
4439 /* Any error interrupts including unit_check, initiate IOA reset.
4440 * In case of unit check indicate to reset_sequence that IOA unit
4441 * checked and prepare for a dump during reset sequence
4442 */
4443 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4444
4445 if (intrs & INTRS_IOA_UNIT_CHECK)
4446 pinstance->ioa_unit_check = 1;
4447
4448 iowrite32(intrs,
4449 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4450 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4451 intrs);
4452 intrs = ioread32(
4453 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4454 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4455 pmcraid_initiate_reset(pinstance);
4456 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4457 } else {
4458 /* If interrupt was as part of the ioa initialization,
4459 * clear. Delete the timer and wakeup the
4460 * reset engine to proceed with reset sequence
4461 */
4462 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4463 pmcraid_clr_trans_op(pinstance);
4464 } else {
4465 iowrite32(intrs,
4466 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4467 ioread32(
4468 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4469
4470 tasklet_schedule(
4471 &(pinstance->isr_tasklet[hrrq_id]));
4472 }
4473 }
4474
4475 return IRQ_HANDLED;
4476}
4477
4478
4479/**
4480 * pmcraid_worker_function - worker thread function
4481 *
4482 * @workp: pointer to struct work queue
4483 *
4484 * Return Value
4485 * None
4486 */
4487
4488static void pmcraid_worker_function(struct work_struct *workp)
4489{
4490 struct pmcraid_instance *pinstance;
4491 struct pmcraid_resource_entry *res;
4492 struct pmcraid_resource_entry *temp;
4493 struct scsi_device *sdev;
4494 unsigned long lock_flags;
4495 unsigned long host_lock_flags;
4496 u16 fw_version;
4497 u8 bus, target, lun;
4498
4499 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4500 /* add resources only after host is added into system */
4501 if (!atomic_read(&pinstance->expose_resources))
4502 return;
4503
4504 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4505
4506 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4507 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4508
4509 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4510 sdev = res->scsi_dev;
4511
4512 /* host_lock must be held before calling
4513 * scsi_device_get
4514 */
4515 spin_lock_irqsave(pinstance->host->host_lock,
4516 host_lock_flags);
4517 if (!scsi_device_get(sdev)) {
4518 spin_unlock_irqrestore(
4519 pinstance->host->host_lock,
4520 host_lock_flags);
4521 pmcraid_info("deleting %x from midlayer\n",
4522 res->cfg_entry.resource_address);
4523 list_move_tail(&res->queue,
4524 &pinstance->free_res_q);
4525 spin_unlock_irqrestore(
4526 &pinstance->resource_lock,
4527 lock_flags);
4528 scsi_remove_device(sdev);
4529 scsi_device_put(sdev);
4530 spin_lock_irqsave(&pinstance->resource_lock,
4531 lock_flags);
4532 res->change_detected = 0;
4533 } else {
4534 spin_unlock_irqrestore(
4535 pinstance->host->host_lock,
4536 host_lock_flags);
4537 }
4538 }
4539 }
4540
4541 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4542
4543 if (res->change_detected == RES_CHANGE_ADD) {
4544
4545 if (!pmcraid_expose_resource(fw_version,
4546 &res->cfg_entry))
4547 continue;
4548
4549 if (RES_IS_VSET(res->cfg_entry)) {
4550 bus = PMCRAID_VSET_BUS_ID;
4551 if (fw_version <= PMCRAID_FW_VERSION_1)
4552 target = res->cfg_entry.unique_flags1;
4553 else
4554 target = res->cfg_entry.array_id & 0xFF;
4555 lun = PMCRAID_VSET_LUN_ID;
4556 } else {
4557 bus = PMCRAID_PHYS_BUS_ID;
4558 target =
4559 RES_TARGET(
4560 res->cfg_entry.resource_address);
4561 lun = RES_LUN(res->cfg_entry.resource_address);
4562 }
4563
4564 res->change_detected = 0;
4565 spin_unlock_irqrestore(&pinstance->resource_lock,
4566 lock_flags);
4567 scsi_add_device(pinstance->host, bus, target, lun);
4568 spin_lock_irqsave(&pinstance->resource_lock,
4569 lock_flags);
4570 }
4571 }
4572
4573 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4574}
4575
4576/**
4577 * pmcraid_tasklet_function - Tasklet function
4578 *
4579 * @instance: pointer to msix param structure
4580 *
4581 * Return Value
4582 * None
4583 */
4584static void pmcraid_tasklet_function(unsigned long instance)
4585{
4586 struct pmcraid_isr_param *hrrq_vector;
4587 struct pmcraid_instance *pinstance;
4588 unsigned long hrrq_lock_flags;
4589 unsigned long pending_lock_flags;
4590 unsigned long host_lock_flags;
4591 spinlock_t *lockp; /* hrrq buffer lock */
4592 int id;
4593 __le32 resp;
4594
4595 hrrq_vector = (struct pmcraid_isr_param *)instance;
4596 pinstance = hrrq_vector->drv_inst;
4597 id = hrrq_vector->hrrq_id;
4598 lockp = &(pinstance->hrrq_lock[id]);
4599
4600 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4601 * protected by its own lock. Traversals must be done within this lock
4602 * as there may be multiple tasklets running on multiple CPUs. Note
4603 * that the lock is held just for picking up the response handle and
4604 * manipulating hrrq_curr/toggle_bit values.
4605 */
4606 spin_lock_irqsave(lockp, hrrq_lock_flags);
4607
4608 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4609
4610 while ((resp & HRRQ_TOGGLE_BIT) ==
4611 pinstance->host_toggle_bit[id]) {
4612
4613 int cmd_index = resp >> 2;
4614 struct pmcraid_cmd *cmd = NULL;
4615
4616 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4617 pinstance->hrrq_curr[id]++;
4618 } else {
4619 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4620 pinstance->host_toggle_bit[id] ^= 1u;
4621 }
4622
4623 if (cmd_index >= PMCRAID_MAX_CMD) {
4624 /* In case of invalid response handle, log message */
4625 pmcraid_err("Invalid response handle %d\n", cmd_index);
4626 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4627 continue;
4628 }
4629
4630 cmd = pinstance->cmd_list[cmd_index];
4631 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4632
4633 spin_lock_irqsave(&pinstance->pending_pool_lock,
4634 pending_lock_flags);
4635 list_del(&cmd->free_list);
4636 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4637 pending_lock_flags);
4638 del_timer(&cmd->timer);
4639 atomic_dec(&pinstance->outstanding_cmds);
4640
4641 if (cmd->cmd_done == pmcraid_ioa_reset) {
4642 spin_lock_irqsave(pinstance->host->host_lock,
4643 host_lock_flags);
4644 cmd->cmd_done(cmd);
4645 spin_unlock_irqrestore(pinstance->host->host_lock,
4646 host_lock_flags);
4647 } else if (cmd->cmd_done != NULL) {
4648 cmd->cmd_done(cmd);
4649 }
4650 /* loop over until we are done with all responses */
4651 spin_lock_irqsave(lockp, hrrq_lock_flags);
4652 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4653 }
4654
4655 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4656}
4657
4658/**
4659 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4660 * @pinstance: pointer to adapter instance structure
4661 *
4662 * This routine un-registers registered interrupt handler and
4663 * also frees irqs/vectors.
4664 *
4665 * Retun Value
4666 * None
4667 */
4668static
4669void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4670{
4671 int i;
4672
4673 for (i = 0; i < pinstance->num_hrrq; i++)
4674 free_irq(pinstance->hrrq_vector[i].vector,
4675 &(pinstance->hrrq_vector[i]));
4676
4677 if (pinstance->interrupt_mode) {
4678 pci_disable_msix(pinstance->pdev);
4679 pinstance->interrupt_mode = 0;
4680 }
4681}
4682
4683/**
4684 * pmcraid_register_interrupt_handler - registers interrupt handler
4685 * @pinstance: pointer to per-adapter instance structure
4686 *
4687 * Return Value
4688 * 0 on success, non-zero error code otherwise.
4689 */
4690static int
4691pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4692{
4693 int rc;
4694 struct pci_dev *pdev = pinstance->pdev;
4695
4696 if ((pmcraid_enable_msix) &&
4697 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
4698 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4699 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4700 int i;
4701 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4702 entries[i].entry = i;
4703
4704 rc = pci_enable_msix(pdev, entries, num_hrrq);
4705 if (rc < 0)
4706 goto pmcraid_isr_legacy;
4707
4708 /* Check how many MSIX vectors are allocated and register
4709 * msi-x handlers for each of them giving appropriate buffer
4710 */
4711 if (rc > 0) {
4712 num_hrrq = rc;
4713 if (pci_enable_msix(pdev, entries, num_hrrq))
4714 goto pmcraid_isr_legacy;
4715 }
4716
4717 for (i = 0; i < num_hrrq; i++) {
4718 pinstance->hrrq_vector[i].hrrq_id = i;
4719 pinstance->hrrq_vector[i].drv_inst = pinstance;
4720 pinstance->hrrq_vector[i].vector = entries[i].vector;
4721 rc = request_irq(pinstance->hrrq_vector[i].vector,
4722 pmcraid_isr_msix, 0,
4723 PMCRAID_DRIVER_NAME,
4724 &(pinstance->hrrq_vector[i]));
4725
4726 if (rc) {
4727 int j;
4728 for (j = 0; j < i; j++)
4729 free_irq(entries[j].vector,
4730 &(pinstance->hrrq_vector[j]));
4731 pci_disable_msix(pdev);
4732 goto pmcraid_isr_legacy;
4733 }
4734 }
4735
4736 pinstance->num_hrrq = num_hrrq;
4737 pinstance->interrupt_mode = 1;
4738 iowrite32(DOORBELL_INTR_MODE_MSIX,
4739 pinstance->int_regs.host_ioa_interrupt_reg);
4740 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4741 goto pmcraid_isr_out;
4742 }
4743
4744pmcraid_isr_legacy:
4745 /* If MSI-X registration failed fallback to legacy mode, where
4746 * only one hrrq entry will be used
4747 */
4748 pinstance->hrrq_vector[0].hrrq_id = 0;
4749 pinstance->hrrq_vector[0].drv_inst = pinstance;
4750 pinstance->hrrq_vector[0].vector = pdev->irq;
4751 pinstance->num_hrrq = 1;
4752 rc = 0;
4753
4754 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4755 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4756pmcraid_isr_out:
4757 return rc;
4758}
4759
4760/**
4761 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4762 * @pinstance: per adapter instance structure pointer
4763 * @max_index: number of buffer blocks to release
4764 *
4765 * Return Value
4766 * None
4767 */
4768static void
4769pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4770{
4771 int i;
4772 for (i = 0; i < max_index; i++) {
4773 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4774 pinstance->cmd_list[i] = NULL;
4775 }
4776 kmem_cache_destroy(pinstance->cmd_cachep);
4777 pinstance->cmd_cachep = NULL;
4778}
4779
4780/**
4781 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4782 * @pinstance: pointer to per adapter instance structure
4783 * @max_index: number of buffers (from 0 onwards) to release
4784 *
4785 * This function assumes that the command blocks for which control blocks are
4786 * linked are not released.
4787 *
4788 * Return Value
4789 * None
4790 */
4791static void
4792pmcraid_release_control_blocks(
4793 struct pmcraid_instance *pinstance,
4794 int max_index
4795)
4796{
4797 int i;
4798
4799 if (pinstance->control_pool == NULL)
4800 return;
4801
4802 for (i = 0; i < max_index; i++) {
4803 pci_pool_free(pinstance->control_pool,
4804 pinstance->cmd_list[i]->ioa_cb,
4805 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4806 pinstance->cmd_list[i]->ioa_cb = NULL;
4807 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4808 }
4809 pci_pool_destroy(pinstance->control_pool);
4810 pinstance->control_pool = NULL;
4811}
4812
4813/**
4814 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4815 * @pinstance - pointer to per adapter instance structure
4816 *
4817 * Allocates memory for command blocks using kernel slab allocator.
4818 *
4819 * Return Value
4820 * 0 in case of success; -ENOMEM in case of failure
4821 */
4822static int __devinit
4823pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4824{
4825 int i;
4826
4827 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4828 pinstance->host->unique_id);
4829
4830
4831 pinstance->cmd_cachep = kmem_cache_create(
4832 pinstance->cmd_pool_name,
4833 sizeof(struct pmcraid_cmd), 0,
4834 SLAB_HWCACHE_ALIGN, NULL);
4835 if (!pinstance->cmd_cachep)
4836 return -ENOMEM;
4837
4838 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4839 pinstance->cmd_list[i] =
4840 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4841 if (!pinstance->cmd_list[i]) {
4842 pmcraid_release_cmd_blocks(pinstance, i);
4843 return -ENOMEM;
4844 }
4845 }
4846 return 0;
4847}
4848
4849/**
4850 * pmcraid_allocate_control_blocks - allocates memory control blocks
4851 * @pinstance : pointer to per adapter instance structure
4852 *
4853 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4854 * and IOASAs. This is called after command blocks are already allocated.
4855 *
4856 * Return Value
4857 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4858 */
4859static int __devinit
4860pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4861{
4862 int i;
4863
4864 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4865 pinstance->host->unique_id);
4866
4867 pinstance->control_pool =
4868 pci_pool_create(pinstance->ctl_pool_name,
4869 pinstance->pdev,
4870 sizeof(struct pmcraid_control_block),
4871 PMCRAID_IOARCB_ALIGNMENT, 0);
4872
4873 if (!pinstance->control_pool)
4874 return -ENOMEM;
4875
4876 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4877 pinstance->cmd_list[i]->ioa_cb =
4878 pci_pool_alloc(
4879 pinstance->control_pool,
4880 GFP_KERNEL,
4881 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4882
4883 if (!pinstance->cmd_list[i]->ioa_cb) {
4884 pmcraid_release_control_blocks(pinstance, i);
4885 return -ENOMEM;
4886 }
4887 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4888 sizeof(struct pmcraid_control_block));
4889 }
4890 return 0;
4891}
4892
4893/**
4894 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4895 * @pinstance: pointer to per adapter instance structure
4896 * @maxindex: size of hrrq buffer pointer array
4897 *
4898 * Return Value
4899 * None
4900 */
4901static void
4902pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4903{
4904 int i;
4905 for (i = 0; i < maxindex; i++) {
4906
4907 pci_free_consistent(pinstance->pdev,
4908 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4909 pinstance->hrrq_start[i],
4910 pinstance->hrrq_start_bus_addr[i]);
4911
4912 /* reset pointers and toggle bit to zeros */
4913 pinstance->hrrq_start[i] = NULL;
4914 pinstance->hrrq_start_bus_addr[i] = 0;
4915 pinstance->host_toggle_bit[i] = 0;
4916 }
4917}
4918
4919/**
4920 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4921 * @pinstance: pointer to per adapter instance structure
4922 *
4923 * Return value
4924 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4925 */
4926static int __devinit
4927pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4928{
4929 int i, buffer_size;
4930
4931 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4932
4933 for (i = 0; i < pinstance->num_hrrq; i++) {
4934 pinstance->hrrq_start[i] =
4935 pci_alloc_consistent(
4936 pinstance->pdev,
4937 buffer_size,
4938 &(pinstance->hrrq_start_bus_addr[i]));
4939
4940 if (pinstance->hrrq_start[i] == 0) {
4941 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4942 i);
4943 pmcraid_release_host_rrqs(pinstance, i);
4944 return -ENOMEM;
4945 }
4946
4947 memset(pinstance->hrrq_start[i], 0, buffer_size);
4948 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4949 pinstance->hrrq_end[i] =
4950 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4951 pinstance->host_toggle_bit[i] = 1;
4952 spin_lock_init(&pinstance->hrrq_lock[i]);
4953 }
4954 return 0;
4955}
4956
4957/**
4958 * pmcraid_release_hcams - release HCAM buffers
4959 *
4960 * @pinstance: pointer to per adapter instance structure
4961 *
4962 * Return value
4963 * none
4964 */
4965static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4966{
4967 if (pinstance->ccn.msg != NULL) {
4968 pci_free_consistent(pinstance->pdev,
4969 PMCRAID_AEN_HDR_SIZE +
4970 sizeof(struct pmcraid_hcam_ccn_ext),
4971 pinstance->ccn.msg,
4972 pinstance->ccn.baddr);
4973
4974 pinstance->ccn.msg = NULL;
4975 pinstance->ccn.hcam = NULL;
4976 pinstance->ccn.baddr = 0;
4977 }
4978
4979 if (pinstance->ldn.msg != NULL) {
4980 pci_free_consistent(pinstance->pdev,
4981 PMCRAID_AEN_HDR_SIZE +
4982 sizeof(struct pmcraid_hcam_ldn),
4983 pinstance->ldn.msg,
4984 pinstance->ldn.baddr);
4985
4986 pinstance->ldn.msg = NULL;
4987 pinstance->ldn.hcam = NULL;
4988 pinstance->ldn.baddr = 0;
4989 }
4990}
4991
4992/**
4993 * pmcraid_allocate_hcams - allocates HCAM buffers
4994 * @pinstance : pointer to per adapter instance structure
4995 *
4996 * Return Value:
4997 * 0 in case of successful allocation, non-zero otherwise
4998 */
4999static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
5000{
5001 pinstance->ccn.msg = pci_alloc_consistent(
5002 pinstance->pdev,
5003 PMCRAID_AEN_HDR_SIZE +
5004 sizeof(struct pmcraid_hcam_ccn_ext),
5005 &(pinstance->ccn.baddr));
5006
5007 pinstance->ldn.msg = pci_alloc_consistent(
5008 pinstance->pdev,
5009 PMCRAID_AEN_HDR_SIZE +
5010 sizeof(struct pmcraid_hcam_ldn),
5011 &(pinstance->ldn.baddr));
5012
5013 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5014 pmcraid_release_hcams(pinstance);
5015 } else {
5016 pinstance->ccn.hcam =
5017 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5018 pinstance->ldn.hcam =
5019 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5020
5021 atomic_set(&pinstance->ccn.ignore, 0);
5022 atomic_set(&pinstance->ldn.ignore, 0);
5023 }
5024
5025 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5026}
5027
5028/**
5029 * pmcraid_release_config_buffers - release config.table buffers
5030 * @pinstance: pointer to per adapter instance structure
5031 *
5032 * Return Value
5033 * none
5034 */
5035static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5036{
5037 if (pinstance->cfg_table != NULL &&
5038 pinstance->cfg_table_bus_addr != 0) {
5039 pci_free_consistent(pinstance->pdev,
5040 sizeof(struct pmcraid_config_table),
5041 pinstance->cfg_table,
5042 pinstance->cfg_table_bus_addr);
5043 pinstance->cfg_table = NULL;
5044 pinstance->cfg_table_bus_addr = 0;
5045 }
5046
5047 if (pinstance->res_entries != NULL) {
5048 int i;
5049
5050 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5051 list_del(&pinstance->res_entries[i].queue);
5052 kfree(pinstance->res_entries);
5053 pinstance->res_entries = NULL;
5054 }
5055
5056 pmcraid_release_hcams(pinstance);
5057}
5058
5059/**
5060 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5061 * @pinstance : pointer to per adapter instance structure
5062 *
5063 * Return Value
5064 * 0 for successful allocation, -ENOMEM for any failure
5065 */
5066static int __devinit
5067pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5068{
5069 int i;
5070
5071 pinstance->res_entries =
5072 kzalloc(sizeof(struct pmcraid_resource_entry) *
5073 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5074
5075 if (NULL == pinstance->res_entries) {
5076 pmcraid_err("failed to allocate memory for resource table\n");
5077 return -ENOMEM;
5078 }
5079
5080 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5081 list_add_tail(&pinstance->res_entries[i].queue,
5082 &pinstance->free_res_q);
5083
5084 pinstance->cfg_table =
5085 pci_alloc_consistent(pinstance->pdev,
5086 sizeof(struct pmcraid_config_table),
5087 &pinstance->cfg_table_bus_addr);
5088
5089 if (NULL == pinstance->cfg_table) {
5090 pmcraid_err("couldn't alloc DMA memory for config table\n");
5091 pmcraid_release_config_buffers(pinstance);
5092 return -ENOMEM;
5093 }
5094
5095 if (pmcraid_allocate_hcams(pinstance)) {
5096 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5097 pmcraid_release_config_buffers(pinstance);
5098 return -ENOMEM;
5099 }
5100
5101 return 0;
5102}
5103
5104/**
5105 * pmcraid_init_tasklets - registers tasklets for response handling
5106 *
5107 * @pinstance: pointer adapter instance structure
5108 *
5109 * Return value
5110 * none
5111 */
5112static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5113{
5114 int i;
5115 for (i = 0; i < pinstance->num_hrrq; i++)
5116 tasklet_init(&pinstance->isr_tasklet[i],
5117 pmcraid_tasklet_function,
5118 (unsigned long)&pinstance->hrrq_vector[i]);
5119}
5120
5121/**
5122 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5123 *
5124 * @pinstance: pointer to adapter instance structure
5125 *
5126 * Return value
5127 * none
5128 */
5129static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5130{
5131 int i;
5132 for (i = 0; i < pinstance->num_hrrq; i++)
5133 tasklet_kill(&pinstance->isr_tasklet[i]);
5134}
5135
5136/**
5137 * pmcraid_release_buffers - release per-adapter buffers allocated
5138 *
5139 * @pinstance: pointer to adapter soft state
5140 *
5141 * Return Value
5142 * none
5143 */
5144static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5145{
5146 pmcraid_release_config_buffers(pinstance);
5147 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5148 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5149 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5150
5151 if (pinstance->inq_data != NULL) {
5152 pci_free_consistent(pinstance->pdev,
5153 sizeof(struct pmcraid_inquiry_data),
5154 pinstance->inq_data,
5155 pinstance->inq_data_baddr);
5156
5157 pinstance->inq_data = NULL;
5158 pinstance->inq_data_baddr = 0;
5159 }
5160
5161 if (pinstance->timestamp_data != NULL) {
5162 pci_free_consistent(pinstance->pdev,
5163 sizeof(struct pmcraid_timestamp_data),
5164 pinstance->timestamp_data,
5165 pinstance->timestamp_data_baddr);
5166
5167 pinstance->timestamp_data = NULL;
5168 pinstance->timestamp_data_baddr = 0;
5169 }
5170}
5171
5172/**
5173 * pmcraid_init_buffers - allocates memory and initializes various structures
5174 * @pinstance: pointer to per adapter instance structure
5175 *
5176 * This routine pre-allocates memory based on the type of block as below:
5177 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5178 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5179 * config-table entries : DMAable memory using pci_alloc_consistent
5180 * HostRRQs : DMAable memory, using pci_alloc_consistent
5181 *
5182 * Return Value
5183 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5184 */
5185static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5186{
5187 int i;
5188
5189 if (pmcraid_allocate_host_rrqs(pinstance)) {
5190 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5191 pinstance->num_hrrq);
5192 return -ENOMEM;
5193 }
5194
5195 if (pmcraid_allocate_config_buffers(pinstance)) {
5196 pmcraid_err("couldn't allocate memory for config buffers\n");
5197 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5198 return -ENOMEM;
5199 }
5200
5201 if (pmcraid_allocate_cmd_blocks(pinstance)) {
5202 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5203 pmcraid_release_config_buffers(pinstance);
5204 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5205 return -ENOMEM;
5206 }
5207
5208 if (pmcraid_allocate_control_blocks(pinstance)) {
5209 pmcraid_err("couldn't allocate memory control blocks\n");
5210 pmcraid_release_config_buffers(pinstance);
5211 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5212 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5213 return -ENOMEM;
5214 }
5215
5216 /* allocate DMAable memory for page D0 INQUIRY buffer */
5217 pinstance->inq_data = pci_alloc_consistent(
5218 pinstance->pdev,
5219 sizeof(struct pmcraid_inquiry_data),
5220 &pinstance->inq_data_baddr);
5221
5222 if (pinstance->inq_data == NULL) {
5223 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5224 pmcraid_release_buffers(pinstance);
5225 return -ENOMEM;
5226 }
5227
5228 /* allocate DMAable memory for set timestamp data buffer */
5229 pinstance->timestamp_data = pci_alloc_consistent(
5230 pinstance->pdev,
5231 sizeof(struct pmcraid_timestamp_data),
5232 &pinstance->timestamp_data_baddr);
5233
5234 if (pinstance->timestamp_data == NULL) {
5235 pmcraid_err("couldn't allocate DMA memory for \
5236 set time_stamp \n");
5237 pmcraid_release_buffers(pinstance);
5238 return -ENOMEM;
5239 }
5240
5241
5242 /* Initialize all the command blocks and add them to free pool. No
5243 * need to lock (free_pool_lock) as this is done in initialization
5244 * itself
5245 */
5246 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5247 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5248 pmcraid_init_cmdblk(cmdp, i);
5249 cmdp->drv_inst = pinstance;
5250 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5251 }
5252
5253 return 0;
5254}
5255
5256/**
5257 * pmcraid_reinit_buffers - resets various buffer pointers
5258 * @pinstance: pointer to adapter instance
5259 * Return value
5260 * none
5261 */
5262static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5263{
5264 int i;
5265 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5266
5267 for (i = 0; i < pinstance->num_hrrq; i++) {
5268 memset(pinstance->hrrq_start[i], 0, buffer_size);
5269 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5270 pinstance->hrrq_end[i] =
5271 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5272 pinstance->host_toggle_bit[i] = 1;
5273 }
5274}
5275
5276/**
5277 * pmcraid_init_instance - initialize per instance data structure
5278 * @pdev: pointer to pci device structure
5279 * @host: pointer to Scsi_Host structure
5280 * @mapped_pci_addr: memory mapped IOA configuration registers
5281 *
5282 * Return Value
5283 * 0 on success, non-zero in case of any failure
5284 */
5285static int __devinit pmcraid_init_instance(
5286 struct pci_dev *pdev,
5287 struct Scsi_Host *host,
5288 void __iomem *mapped_pci_addr
5289)
5290{
5291 struct pmcraid_instance *pinstance =
5292 (struct pmcraid_instance *)host->hostdata;
5293
5294 pinstance->host = host;
5295 pinstance->pdev = pdev;
5296
5297 /* Initialize register addresses */
5298 pinstance->mapped_dma_addr = mapped_pci_addr;
5299
5300 /* Initialize chip-specific details */
5301 {
5302 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5303 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5304
5305 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5306
5307 pint_regs->ioa_host_interrupt_reg =
5308 mapped_pci_addr + chip_cfg->ioa_host_intr;
5309 pint_regs->ioa_host_interrupt_clr_reg =
5310 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5311 pint_regs->ioa_host_msix_interrupt_reg =
5312 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5313 pint_regs->host_ioa_interrupt_reg =
5314 mapped_pci_addr + chip_cfg->host_ioa_intr;
5315 pint_regs->host_ioa_interrupt_clr_reg =
5316 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5317
5318 /* Current version of firmware exposes interrupt mask set
5319 * and mask clr registers through memory mapped bar0.
5320 */
5321 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5322 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5323 pint_regs->ioa_host_interrupt_mask_reg =
5324 mapped_pci_addr + chip_cfg->ioa_host_mask;
5325 pint_regs->ioa_host_interrupt_mask_clr_reg =
5326 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5327 pint_regs->global_interrupt_mask_reg =
5328 mapped_pci_addr + chip_cfg->global_intr_mask;
5329 };
5330
5331 pinstance->ioa_reset_attempts = 0;
5332 init_waitqueue_head(&pinstance->reset_wait_q);
5333
5334 atomic_set(&pinstance->outstanding_cmds, 0);
5335 atomic_set(&pinstance->last_message_id, 0);
5336 atomic_set(&pinstance->expose_resources, 0);
5337
5338 INIT_LIST_HEAD(&pinstance->free_res_q);
5339 INIT_LIST_HEAD(&pinstance->used_res_q);
5340 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5341 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5342
5343 spin_lock_init(&pinstance->free_pool_lock);
5344 spin_lock_init(&pinstance->pending_pool_lock);
5345 spin_lock_init(&pinstance->resource_lock);
5346 mutex_init(&pinstance->aen_queue_lock);
5347
5348 /* Work-queue (Shared) for deferred processing error handling */
5349 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5350
5351 /* Initialize the default log_level */
5352 pinstance->current_log_level = pmcraid_log_level;
5353
5354 /* Setup variables required for reset engine */
5355 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5356 pinstance->reset_cmd = NULL;
5357 return 0;
5358}
5359
5360/**
5361 * pmcraid_shutdown - shutdown adapter controller.
5362 * @pdev: pci device struct
5363 *
5364 * Issues an adapter shutdown to the card waits for its completion
5365 *
5366 * Return value
5367 * none
5368 */
5369static void pmcraid_shutdown(struct pci_dev *pdev)
5370{
5371 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5372 pmcraid_reset_bringdown(pinstance);
5373}
5374
5375
5376/**
5377 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5378 */
5379static unsigned short pmcraid_get_minor(void)
5380{
5381 int minor;
5382
5383 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5384 __set_bit(minor, pmcraid_minor);
5385 return minor;
5386}
5387
5388/**
5389 * pmcraid_release_minor - releases given minor back to minor number bitmap
5390 */
5391static void pmcraid_release_minor(unsigned short minor)
5392{
5393 __clear_bit(minor, pmcraid_minor);
5394}
5395
5396/**
5397 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5398 *
5399 * @pinstance: pointer to adapter instance for which to register device
5400 *
5401 * Return value
5402 * 0 in case of success, otherwise non-zero
5403 */
5404static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5405{
5406 int minor;
5407 int error;
5408
5409 minor = pmcraid_get_minor();
5410 cdev_init(&pinstance->cdev, &pmcraid_fops);
5411 pinstance->cdev.owner = THIS_MODULE;
5412
5413 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5414
5415 if (error)
5416 pmcraid_release_minor(minor);
5417 else
5418 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5419 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5420 return error;
5421}
5422
5423/**
5424 * pmcraid_release_chrdev - unregisters per-adapter management interface
5425 *
5426 * @pinstance: pointer to adapter instance structure
5427 *
5428 * Return value
5429 * none
5430 */
5431static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5432{
5433 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5434 device_destroy(pmcraid_class,
5435 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5436 cdev_del(&pinstance->cdev);
5437}
5438
5439/**
5440 * pmcraid_remove - IOA hot plug remove entry point
5441 * @pdev: pci device struct
5442 *
5443 * Return value
5444 * none
5445 */
5446static void __devexit pmcraid_remove(struct pci_dev *pdev)
5447{
5448 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5449
5450 /* remove the management interface (/dev file) for this device */
5451 pmcraid_release_chrdev(pinstance);
5452
5453 /* remove host template from scsi midlayer */
5454 scsi_remove_host(pinstance->host);
5455
5456 /* block requests from mid-layer */
5457 scsi_block_requests(pinstance->host);
5458
5459 /* initiate shutdown adapter */
5460 pmcraid_shutdown(pdev);
5461
5462 pmcraid_disable_interrupts(pinstance, ~0);
5463 flush_work_sync(&pinstance->worker_q);
5464
5465 pmcraid_kill_tasklets(pinstance);
5466 pmcraid_unregister_interrupt_handler(pinstance);
5467 pmcraid_release_buffers(pinstance);
5468 iounmap(pinstance->mapped_dma_addr);
5469 pci_release_regions(pdev);
5470 scsi_host_put(pinstance->host);
5471 pci_disable_device(pdev);
5472
5473 return;
5474}
5475
5476#ifdef CONFIG_PM
5477/**
5478 * pmcraid_suspend - driver suspend entry point for power management
5479 * @pdev: PCI device structure
5480 * @state: PCI power state to suspend routine
5481 *
5482 * Return Value - 0 always
5483 */
5484static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5485{
5486 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5487
5488 pmcraid_shutdown(pdev);
5489 pmcraid_disable_interrupts(pinstance, ~0);
5490 pmcraid_kill_tasklets(pinstance);
5491 pci_set_drvdata(pinstance->pdev, pinstance);
5492 pmcraid_unregister_interrupt_handler(pinstance);
5493 pci_save_state(pdev);
5494 pci_disable_device(pdev);
5495 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5496
5497 return 0;
5498}
5499
5500/**
5501 * pmcraid_resume - driver resume entry point PCI power management
5502 * @pdev: PCI device structure
5503 *
5504 * Return Value - 0 in case of success. Error code in case of any failure
5505 */
5506static int pmcraid_resume(struct pci_dev *pdev)
5507{
5508 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5509 struct Scsi_Host *host = pinstance->host;
5510 int rc;
5511
5512 pci_set_power_state(pdev, PCI_D0);
5513 pci_enable_wake(pdev, PCI_D0, 0);
5514 pci_restore_state(pdev);
5515
5516 rc = pci_enable_device(pdev);
5517
5518 if (rc) {
5519 dev_err(&pdev->dev, "resume: Enable device failed\n");
5520 return rc;
5521 }
5522
5523 pci_set_master(pdev);
5524
5525 if ((sizeof(dma_addr_t) == 4) ||
5526 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5527 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5528
5529 if (rc == 0)
5530 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5531
5532 if (rc != 0) {
5533 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5534 goto disable_device;
5535 }
5536
5537 pmcraid_disable_interrupts(pinstance, ~0);
5538 atomic_set(&pinstance->outstanding_cmds, 0);
5539 rc = pmcraid_register_interrupt_handler(pinstance);
5540
5541 if (rc) {
5542 dev_err(&pdev->dev,
5543 "resume: couldn't register interrupt handlers\n");
5544 rc = -ENODEV;
5545 goto release_host;
5546 }
5547
5548 pmcraid_init_tasklets(pinstance);
5549 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5550
5551 /* Start with hard reset sequence which brings up IOA to operational
5552 * state as well as completes the reset sequence.
5553 */
5554 pinstance->ioa_hard_reset = 1;
5555
5556 /* Start IOA firmware initialization and bring card to Operational
5557 * state.
5558 */
5559 if (pmcraid_reset_bringup(pinstance)) {
5560 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5561 rc = -ENODEV;
5562 goto release_tasklets;
5563 }
5564
5565 return 0;
5566
5567release_tasklets:
5568 pmcraid_disable_interrupts(pinstance, ~0);
5569 pmcraid_kill_tasklets(pinstance);
5570 pmcraid_unregister_interrupt_handler(pinstance);
5571
5572release_host:
5573 scsi_host_put(host);
5574
5575disable_device:
5576 pci_disable_device(pdev);
5577
5578 return rc;
5579}
5580
5581#else
5582
5583#define pmcraid_suspend NULL
5584#define pmcraid_resume NULL
5585
5586#endif /* CONFIG_PM */
5587
5588/**
5589 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5590 * completion of the ioa reset
5591 * @cmd: pointer to reset command block
5592 */
5593static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5594{
5595 struct pmcraid_instance *pinstance = cmd->drv_inst;
5596 unsigned long flags;
5597
5598 spin_lock_irqsave(pinstance->host->host_lock, flags);
5599 pmcraid_ioa_reset(cmd);
5600 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5601 scsi_unblock_requests(pinstance->host);
5602 schedule_work(&pinstance->worker_q);
5603}
5604
5605/**
5606 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5607 *
5608 * @cmd: pointer to pmcraid_cmd structure
5609 *
5610 * Return Value
5611 * 0 for success or non-zero for failure cases
5612 */
5613static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5614{
5615 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5616 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5617
5618 pmcraid_reinit_cmdblk(cmd);
5619
5620 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5621 ioarcb->request_type = REQ_TYPE_IOACMD;
5622 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5623 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5624
5625 /* If this was called as part of resource table reinitialization due to
5626 * lost CCN, it is enough to return the command block back to free pool
5627 * as part of set_supported_devs completion function.
5628 */
5629 if (cmd->drv_inst->reinit_cfg_table) {
5630 cmd->drv_inst->reinit_cfg_table = 0;
5631 cmd->release = 1;
5632 cmd_done = pmcraid_reinit_cfgtable_done;
5633 }
5634
5635 /* we will be done with the reset sequence after set supported devices,
5636 * setup the done function to return the command block back to free
5637 * pool
5638 */
5639 pmcraid_send_cmd(cmd,
5640 cmd_done,
5641 PMCRAID_SET_SUP_DEV_TIMEOUT,
5642 pmcraid_timeout_handler);
5643 return;
5644}
5645
5646/**
5647 * pmcraid_set_timestamp - set the timestamp to IOAFP
5648 *
5649 * @cmd: pointer to pmcraid_cmd structure
5650 *
5651 * Return Value
5652 * 0 for success or non-zero for failure cases
5653 */
5654static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5655{
5656 struct pmcraid_instance *pinstance = cmd->drv_inst;
5657 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5658 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5659 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5660
5661 struct timeval tv;
5662 __le64 timestamp;
5663
5664 do_gettimeofday(&tv);
5665 timestamp = tv.tv_sec * 1000;
5666
5667 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5668 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5669 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5670 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5671 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5672 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5673
5674 pmcraid_reinit_cmdblk(cmd);
5675 ioarcb->request_type = REQ_TYPE_SCSI;
5676 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5677 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5678 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5679 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5680
5681 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5682 offsetof(struct pmcraid_ioarcb,
5683 add_data.u.ioadl[0]));
5684 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5685 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5686
5687 ioarcb->request_flags0 |= NO_LINK_DESCS;
5688 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5689 ioarcb->data_transfer_length =
5690 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5691 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5692 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5693 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5694 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5695
5696 if (!pinstance->timestamp_error) {
5697 pinstance->timestamp_error = 0;
5698 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5699 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5700 } else {
5701 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5702 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5703 return;
5704 }
5705}
5706
5707
5708/**
5709 * pmcraid_init_res_table - Initialize the resource table
5710 * @cmd: pointer to pmcraid command struct
5711 *
5712 * This function looks through the existing resource table, comparing
5713 * it with the config table. This function will take care of old/new
5714 * devices and schedule adding/removing them from the mid-layer
5715 * as appropriate.
5716 *
5717 * Return value
5718 * None
5719 */
5720static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5721{
5722 struct pmcraid_instance *pinstance = cmd->drv_inst;
5723 struct pmcraid_resource_entry *res, *temp;
5724 struct pmcraid_config_table_entry *cfgte;
5725 unsigned long lock_flags;
5726 int found, rc, i;
5727 u16 fw_version;
5728 LIST_HEAD(old_res);
5729
5730 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5731 pmcraid_err("IOA requires microcode download\n");
5732
5733 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5734
5735 /* resource list is protected by pinstance->resource_lock.
5736 * init_res_table can be called from probe (user-thread) or runtime
5737 * reset (timer/tasklet)
5738 */
5739 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5740
5741 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5742 list_move_tail(&res->queue, &old_res);
5743
5744 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
5745 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5746 PMCRAID_FW_VERSION_1)
5747 cfgte = &pinstance->cfg_table->entries[i];
5748 else
5749 cfgte = (struct pmcraid_config_table_entry *)
5750 &pinstance->cfg_table->entries_ext[i];
5751
5752 if (!pmcraid_expose_resource(fw_version, cfgte))
5753 continue;
5754
5755 found = 0;
5756
5757 /* If this entry was already detected and initialized */
5758 list_for_each_entry_safe(res, temp, &old_res, queue) {
5759
5760 rc = memcmp(&res->cfg_entry.resource_address,
5761 &cfgte->resource_address,
5762 sizeof(cfgte->resource_address));
5763 if (!rc) {
5764 list_move_tail(&res->queue,
5765 &pinstance->used_res_q);
5766 found = 1;
5767 break;
5768 }
5769 }
5770
5771 /* If this is new entry, initialize it and add it the queue */
5772 if (!found) {
5773
5774 if (list_empty(&pinstance->free_res_q)) {
5775 pmcraid_err("Too many devices attached\n");
5776 break;
5777 }
5778
5779 found = 1;
5780 res = list_entry(pinstance->free_res_q.next,
5781 struct pmcraid_resource_entry, queue);
5782
5783 res->scsi_dev = NULL;
5784 res->change_detected = RES_CHANGE_ADD;
5785 res->reset_progress = 0;
5786 list_move_tail(&res->queue, &pinstance->used_res_q);
5787 }
5788
5789 /* copy new configuration table entry details into driver
5790 * maintained resource entry
5791 */
5792 if (found) {
5793 memcpy(&res->cfg_entry, cfgte,
5794 pinstance->config_table_entry_size);
5795 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5796 res->cfg_entry.resource_type,
5797 (fw_version <= PMCRAID_FW_VERSION_1 ?
5798 res->cfg_entry.unique_flags1 :
5799 res->cfg_entry.array_id & 0xFF),
5800 le32_to_cpu(res->cfg_entry.resource_address));
5801 }
5802 }
5803
5804 /* Detect any deleted entries, mark them for deletion from mid-layer */
5805 list_for_each_entry_safe(res, temp, &old_res, queue) {
5806
5807 if (res->scsi_dev) {
5808 res->change_detected = RES_CHANGE_DEL;
5809 res->cfg_entry.resource_handle =
5810 PMCRAID_INVALID_RES_HANDLE;
5811 list_move_tail(&res->queue, &pinstance->used_res_q);
5812 } else {
5813 list_move_tail(&res->queue, &pinstance->free_res_q);
5814 }
5815 }
5816
5817 /* release the resource list lock */
5818 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5819 pmcraid_set_timestamp(cmd);
5820}
5821
5822/**
5823 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5824 * @cmd: pointer pmcraid_cmd struct
5825 *
5826 * This function sends a Query IOA Configuration command to the adapter to
5827 * retrieve the IOA configuration table.
5828 *
5829 * Return value:
5830 * none
5831 */
5832static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5833{
5834 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5835 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5836 struct pmcraid_instance *pinstance = cmd->drv_inst;
5837 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5838
5839 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5840 PMCRAID_FW_VERSION_1)
5841 pinstance->config_table_entry_size =
5842 sizeof(struct pmcraid_config_table_entry);
5843 else
5844 pinstance->config_table_entry_size =
5845 sizeof(struct pmcraid_config_table_entry_ext);
5846
5847 ioarcb->request_type = REQ_TYPE_IOACMD;
5848 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5849
5850 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5851
5852 /* firmware requires 4-byte length field, specified in B.E format */
5853 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5854
5855 /* Since entire config table can be described by single IOADL, it can
5856 * be part of IOARCB itself
5857 */
5858 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5859 offsetof(struct pmcraid_ioarcb,
5860 add_data.u.ioadl[0]));
5861 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5862 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5863
5864 ioarcb->request_flags0 |= NO_LINK_DESCS;
5865 ioarcb->data_transfer_length =
5866 cpu_to_le32(sizeof(struct pmcraid_config_table));
5867
5868 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5869 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5870 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5871 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5872
5873 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5874 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5875}
5876
5877
5878/**
5879 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5880 * @pdev: pointer to pci device structure
5881 * @dev_id: pointer to device ids structure
5882 *
5883 * Return Value
5884 * returns 0 if the device is claimed and successfully configured.
5885 * returns non-zero error code in case of any failure
5886 */
5887static int __devinit pmcraid_probe(
5888 struct pci_dev *pdev,
5889 const struct pci_device_id *dev_id
5890)
5891{
5892 struct pmcraid_instance *pinstance;
5893 struct Scsi_Host *host;
5894 void __iomem *mapped_pci_addr;
5895 int rc = PCIBIOS_SUCCESSFUL;
5896
5897 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5898 pmcraid_err
5899 ("maximum number(%d) of supported adapters reached\n",
5900 atomic_read(&pmcraid_adapter_count));
5901 return -ENOMEM;
5902 }
5903
5904 atomic_inc(&pmcraid_adapter_count);
5905 rc = pci_enable_device(pdev);
5906
5907 if (rc) {
5908 dev_err(&pdev->dev, "Cannot enable adapter\n");
5909 atomic_dec(&pmcraid_adapter_count);
5910 return rc;
5911 }
5912
5913 dev_info(&pdev->dev,
5914 "Found new IOA(%x:%x), Total IOA count: %d\n",
5915 pdev->vendor, pdev->device,
5916 atomic_read(&pmcraid_adapter_count));
5917
5918 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5919
5920 if (rc < 0) {
5921 dev_err(&pdev->dev,
5922 "Couldn't register memory range of registers\n");
5923 goto out_disable_device;
5924 }
5925
5926 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5927
5928 if (!mapped_pci_addr) {
5929 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5930 rc = -ENOMEM;
5931 goto out_release_regions;
5932 }
5933
5934 pci_set_master(pdev);
5935
5936 /* Firmware requires the system bus address of IOARCB to be within
5937 * 32-bit addressable range though it has 64-bit IOARRIN register.
5938 * However, firmware supports 64-bit streaming DMA buffers, whereas
5939 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5940 * returns memory within 4GB (if not, change this logic), coherent
5941 * buffers are within firmware acceptable address ranges.
5942 */
5943 if ((sizeof(dma_addr_t) == 4) ||
5944 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5945 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5946
5947 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5948 * bit mask for pci_alloc_consistent to return addresses within 4GB
5949 */
5950 if (rc == 0)
5951 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5952
5953 if (rc != 0) {
5954 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5955 goto cleanup_nomem;
5956 }
5957
5958 host = scsi_host_alloc(&pmcraid_host_template,
5959 sizeof(struct pmcraid_instance));
5960
5961 if (!host) {
5962 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5963 rc = -ENOMEM;
5964 goto cleanup_nomem;
5965 }
5966
5967 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5968 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5969 host->unique_id = host->host_no;
5970 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5971 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5972
5973 /* zero out entire instance structure */
5974 pinstance = (struct pmcraid_instance *)host->hostdata;
5975 memset(pinstance, 0, sizeof(*pinstance));
5976
5977 pinstance->chip_cfg =
5978 (struct pmcraid_chip_details *)(dev_id->driver_data);
5979
5980 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5981
5982 if (rc < 0) {
5983 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5984 goto out_scsi_host_put;
5985 }
5986
5987 pci_set_drvdata(pdev, pinstance);
5988
5989 /* Save PCI config-space for use following the reset */
5990 rc = pci_save_state(pinstance->pdev);
5991
5992 if (rc != 0) {
5993 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5994 goto out_scsi_host_put;
5995 }
5996
5997 pmcraid_disable_interrupts(pinstance, ~0);
5998
5999 rc = pmcraid_register_interrupt_handler(pinstance);
6000
6001 if (rc) {
6002 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
6003 goto out_scsi_host_put;
6004 }
6005
6006 pmcraid_init_tasklets(pinstance);
6007
6008 /* allocate verious buffers used by LLD.*/
6009 rc = pmcraid_init_buffers(pinstance);
6010
6011 if (rc) {
6012 pmcraid_err("couldn't allocate memory blocks\n");
6013 goto out_unregister_isr;
6014 }
6015
6016 /* check the reset type required */
6017 pmcraid_reset_type(pinstance);
6018
6019 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
6020
6021 /* Start IOA firmware initialization and bring card to Operational
6022 * state.
6023 */
6024 pmcraid_info("starting IOA initialization sequence\n");
6025 if (pmcraid_reset_bringup(pinstance)) {
6026 dev_err(&pdev->dev, "couldn't initialize IOA\n");
6027 rc = 1;
6028 goto out_release_bufs;
6029 }
6030
6031 /* Add adapter instance into mid-layer list */
6032 rc = scsi_add_host(pinstance->host, &pdev->dev);
6033 if (rc != 0) {
6034 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6035 goto out_release_bufs;
6036 }
6037
6038 scsi_scan_host(pinstance->host);
6039
6040 rc = pmcraid_setup_chrdev(pinstance);
6041
6042 if (rc != 0) {
6043 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6044 rc);
6045 goto out_remove_host;
6046 }
6047
6048 /* Schedule worker thread to handle CCN and take care of adding and
6049 * removing devices to OS
6050 */
6051 atomic_set(&pinstance->expose_resources, 1);
6052 schedule_work(&pinstance->worker_q);
6053 return rc;
6054
6055out_remove_host:
6056 scsi_remove_host(host);
6057
6058out_release_bufs:
6059 pmcraid_release_buffers(pinstance);
6060
6061out_unregister_isr:
6062 pmcraid_kill_tasklets(pinstance);
6063 pmcraid_unregister_interrupt_handler(pinstance);
6064
6065out_scsi_host_put:
6066 scsi_host_put(host);
6067
6068cleanup_nomem:
6069 iounmap(mapped_pci_addr);
6070
6071out_release_regions:
6072 pci_release_regions(pdev);
6073
6074out_disable_device:
6075 atomic_dec(&pmcraid_adapter_count);
6076 pci_set_drvdata(pdev, NULL);
6077 pci_disable_device(pdev);
6078 return -ENODEV;
6079}
6080
6081/*
6082 * PCI driver structure of pcmraid driver
6083 */
6084static struct pci_driver pmcraid_driver = {
6085 .name = PMCRAID_DRIVER_NAME,
6086 .id_table = pmcraid_pci_table,
6087 .probe = pmcraid_probe,
6088 .remove = pmcraid_remove,
6089 .suspend = pmcraid_suspend,
6090 .resume = pmcraid_resume,
6091 .shutdown = pmcraid_shutdown
6092};
6093
6094/**
6095 * pmcraid_init - module load entry point
6096 */
6097static int __init pmcraid_init(void)
6098{
6099 dev_t dev;
6100 int error;
6101
6102 pmcraid_info("%s Device Driver version: %s\n",
6103 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
6104
6105 error = alloc_chrdev_region(&dev, 0,
6106 PMCRAID_MAX_ADAPTERS,
6107 PMCRAID_DEVFILE);
6108
6109 if (error) {
6110 pmcraid_err("failed to get a major number for adapters\n");
6111 goto out_init;
6112 }
6113
6114 pmcraid_major = MAJOR(dev);
6115 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6116
6117 if (IS_ERR(pmcraid_class)) {
6118 error = PTR_ERR(pmcraid_class);
6119 pmcraid_err("failed to register with with sysfs, error = %x\n",
6120 error);
6121 goto out_unreg_chrdev;
6122 }
6123
6124 error = pmcraid_netlink_init();
6125
6126 if (error)
6127 goto out_unreg_chrdev;
6128
6129 error = pci_register_driver(&pmcraid_driver);
6130
6131 if (error == 0)
6132 goto out_init;
6133
6134 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6135 error);
6136 class_destroy(pmcraid_class);
6137 pmcraid_netlink_release();
6138
6139out_unreg_chrdev:
6140 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
6141
6142out_init:
6143 return error;
6144}
6145
6146/**
6147 * pmcraid_exit - module unload entry point
6148 */
6149static void __exit pmcraid_exit(void)
6150{
6151 pmcraid_netlink_release();
6152 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6153 PMCRAID_MAX_ADAPTERS);
6154 pci_unregister_driver(&pmcraid_driver);
6155 class_destroy(pmcraid_class);
6156}
6157
6158module_init(pmcraid_init);
6159module_exit(pmcraid_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
4 *
5 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
6 * PMC-Sierra Inc
7 *
8 * Copyright (C) 2008, 2009 PMC Sierra Inc
9 */
10#include <linux/fs.h>
11#include <linux/init.h>
12#include <linux/types.h>
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/ioport.h>
16#include <linux/delay.h>
17#include <linux/pci.h>
18#include <linux/wait.h>
19#include <linux/spinlock.h>
20#include <linux/sched.h>
21#include <linux/interrupt.h>
22#include <linux/blkdev.h>
23#include <linux/firmware.h>
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/hdreg.h>
27#include <linux/io.h>
28#include <linux/slab.h>
29#include <asm/irq.h>
30#include <asm/processor.h>
31#include <linux/libata.h>
32#include <linux/mutex.h>
33#include <linux/ktime.h>
34#include <scsi/scsi.h>
35#include <scsi/scsi_host.h>
36#include <scsi/scsi_device.h>
37#include <scsi/scsi_tcq.h>
38#include <scsi/scsi_eh.h>
39#include <scsi/scsi_cmnd.h>
40#include <scsi/scsicam.h>
41
42#include "pmcraid.h"
43
44/*
45 * Module configuration parameters
46 */
47static unsigned int pmcraid_debug_log;
48static unsigned int pmcraid_disable_aen;
49static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
50static unsigned int pmcraid_enable_msix;
51
52/*
53 * Data structures to support multiple adapters by the LLD.
54 * pmcraid_adapter_count - count of configured adapters
55 */
56static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
57
58/*
59 * Supporting user-level control interface through IOCTL commands.
60 * pmcraid_major - major number to use
61 * pmcraid_minor - minor number(s) to use
62 */
63static unsigned int pmcraid_major;
64static struct class *pmcraid_class;
65static DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
66
67/*
68 * Module parameters
69 */
70MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
71MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
72MODULE_LICENSE("GPL");
73MODULE_VERSION(PMCRAID_DRIVER_VERSION);
74
75module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
76MODULE_PARM_DESC(log_level,
77 "Enables firmware error code logging, default :1 high-severity"
78 " errors, 2: all errors including high-severity errors,"
79 " 0: disables logging");
80
81module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
82MODULE_PARM_DESC(debug,
83 "Enable driver verbose message logging. Set 1 to enable."
84 "(default: 0)");
85
86module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
87MODULE_PARM_DESC(disable_aen,
88 "Disable driver aen notifications to apps. Set 1 to disable."
89 "(default: 0)");
90
91/* chip specific constants for PMC MaxRAID controllers (same for
92 * 0x5220 and 0x8010
93 */
94static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
95 {
96 .ioastatus = 0x0,
97 .ioarrin = 0x00040,
98 .mailbox = 0x7FC30,
99 .global_intr_mask = 0x00034,
100 .ioa_host_intr = 0x0009C,
101 .ioa_host_intr_clr = 0x000A0,
102 .ioa_host_msix_intr = 0x7FC40,
103 .ioa_host_mask = 0x7FC28,
104 .ioa_host_mask_clr = 0x7FC28,
105 .host_ioa_intr = 0x00020,
106 .host_ioa_intr_clr = 0x00020,
107 .transop_timeout = 300
108 }
109};
110
111/*
112 * PCI device ids supported by pmcraid driver
113 */
114static struct pci_device_id pmcraid_pci_table[] = {
115 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
116 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
117 },
118 {}
119};
120
121MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
122
123
124
125/**
126 * pmcraid_slave_alloc - Prepare for commands to a device
127 * @scsi_dev: scsi device struct
128 *
129 * This function is called by mid-layer prior to sending any command to the new
130 * device. Stores resource entry details of the device in scsi_device struct.
131 * Queuecommand uses the resource handle and other details to fill up IOARCB
132 * while sending commands to the device.
133 *
134 * Return value:
135 * 0 on success / -ENXIO if device does not exist
136 */
137static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
138{
139 struct pmcraid_resource_entry *temp, *res = NULL;
140 struct pmcraid_instance *pinstance;
141 u8 target, bus, lun;
142 unsigned long lock_flags;
143 int rc = -ENXIO;
144 u16 fw_version;
145
146 pinstance = shost_priv(scsi_dev->host);
147
148 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
149
150 /* Driver exposes VSET and GSCSI resources only; all other device types
151 * are not exposed. Resource list is synchronized using resource lock
152 * so any traversal or modifications to the list should be done inside
153 * this lock
154 */
155 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
156 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
157
158 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
159 if (RES_IS_VSET(temp->cfg_entry)) {
160 if (fw_version <= PMCRAID_FW_VERSION_1)
161 target = temp->cfg_entry.unique_flags1;
162 else
163 target = le16_to_cpu(temp->cfg_entry.array_id) & 0xFF;
164
165 if (target > PMCRAID_MAX_VSET_TARGETS)
166 continue;
167 bus = PMCRAID_VSET_BUS_ID;
168 lun = 0;
169 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
170 target = RES_TARGET(temp->cfg_entry.resource_address);
171 bus = PMCRAID_PHYS_BUS_ID;
172 lun = RES_LUN(temp->cfg_entry.resource_address);
173 } else {
174 continue;
175 }
176
177 if (bus == scsi_dev->channel &&
178 target == scsi_dev->id &&
179 lun == scsi_dev->lun) {
180 res = temp;
181 break;
182 }
183 }
184
185 if (res) {
186 res->scsi_dev = scsi_dev;
187 scsi_dev->hostdata = res;
188 res->change_detected = 0;
189 atomic_set(&res->read_failures, 0);
190 atomic_set(&res->write_failures, 0);
191 rc = 0;
192 }
193 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
194 return rc;
195}
196
197/**
198 * pmcraid_slave_configure - Configures a SCSI device
199 * @scsi_dev: scsi device struct
200 *
201 * This function is executed by SCSI mid layer just after a device is first
202 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
203 * timeout value (default 30s) will be over-written to a higher value (60s)
204 * and max_sectors value will be over-written to 512. It also sets queue depth
205 * to host->cmd_per_lun value
206 *
207 * Return value:
208 * 0 on success
209 */
210static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
211{
212 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
213
214 if (!res)
215 return 0;
216
217 /* LLD exposes VSETs and Enclosure devices only */
218 if (RES_IS_GSCSI(res->cfg_entry) &&
219 scsi_dev->type != TYPE_ENCLOSURE)
220 return -ENXIO;
221
222 pmcraid_info("configuring %x:%x:%x:%x\n",
223 scsi_dev->host->unique_id,
224 scsi_dev->channel,
225 scsi_dev->id,
226 (u8)scsi_dev->lun);
227
228 if (RES_IS_GSCSI(res->cfg_entry)) {
229 scsi_dev->allow_restart = 1;
230 } else if (RES_IS_VSET(res->cfg_entry)) {
231 scsi_dev->allow_restart = 1;
232 blk_queue_rq_timeout(scsi_dev->request_queue,
233 PMCRAID_VSET_IO_TIMEOUT);
234 blk_queue_max_hw_sectors(scsi_dev->request_queue,
235 PMCRAID_VSET_MAX_SECTORS);
236 }
237
238 /*
239 * We never want to report TCQ support for these types of devices.
240 */
241 if (!RES_IS_GSCSI(res->cfg_entry) && !RES_IS_VSET(res->cfg_entry))
242 scsi_dev->tagged_supported = 0;
243
244 return 0;
245}
246
247/**
248 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
249 *
250 * @scsi_dev: scsi device struct
251 *
252 * This is called by mid-layer before removing a device. Pointer assignments
253 * done in pmcraid_slave_alloc will be reset to NULL here.
254 *
255 * Return value
256 * none
257 */
258static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
259{
260 struct pmcraid_resource_entry *res;
261
262 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
263
264 if (res)
265 res->scsi_dev = NULL;
266
267 scsi_dev->hostdata = NULL;
268}
269
270/**
271 * pmcraid_change_queue_depth - Change the device's queue depth
272 * @scsi_dev: scsi device struct
273 * @depth: depth to set
274 *
275 * Return value
276 * actual depth set
277 */
278static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
279{
280 if (depth > PMCRAID_MAX_CMD_PER_LUN)
281 depth = PMCRAID_MAX_CMD_PER_LUN;
282 return scsi_change_queue_depth(scsi_dev, depth);
283}
284
285/**
286 * pmcraid_init_cmdblk - initializes a command block
287 *
288 * @cmd: pointer to struct pmcraid_cmd to be initialized
289 * @index: if >=0 first time initialization; otherwise reinitialization
290 *
291 * Return Value
292 * None
293 */
294static void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
295{
296 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
297 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
298
299 if (index >= 0) {
300 /* first time initialization (called from probe) */
301 u32 ioasa_offset =
302 offsetof(struct pmcraid_control_block, ioasa);
303
304 cmd->index = index;
305 ioarcb->response_handle = cpu_to_le32(index << 2);
306 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
307 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
308 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
309 } else {
310 /* re-initialization of various lengths, called once command is
311 * processed by IOA
312 */
313 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
314 ioarcb->hrrq_id = 0;
315 ioarcb->request_flags0 = 0;
316 ioarcb->request_flags1 = 0;
317 ioarcb->cmd_timeout = 0;
318 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
319 ioarcb->ioadl_bus_addr = 0;
320 ioarcb->ioadl_length = 0;
321 ioarcb->data_transfer_length = 0;
322 ioarcb->add_cmd_param_length = 0;
323 ioarcb->add_cmd_param_offset = 0;
324 cmd->ioa_cb->ioasa.ioasc = 0;
325 cmd->ioa_cb->ioasa.residual_data_length = 0;
326 cmd->time_left = 0;
327 }
328
329 cmd->cmd_done = NULL;
330 cmd->scsi_cmd = NULL;
331 cmd->release = 0;
332 cmd->completion_req = 0;
333 cmd->sense_buffer = NULL;
334 cmd->sense_buffer_dma = 0;
335 cmd->dma_handle = 0;
336 timer_setup(&cmd->timer, NULL, 0);
337}
338
339/**
340 * pmcraid_reinit_cmdblk - reinitialize a command block
341 *
342 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
343 *
344 * Return Value
345 * None
346 */
347static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
348{
349 pmcraid_init_cmdblk(cmd, -1);
350}
351
352/**
353 * pmcraid_get_free_cmd - get a free cmd block from command block pool
354 * @pinstance: adapter instance structure
355 *
356 * Return Value:
357 * returns pointer to cmd block or NULL if no blocks are available
358 */
359static struct pmcraid_cmd *pmcraid_get_free_cmd(
360 struct pmcraid_instance *pinstance
361)
362{
363 struct pmcraid_cmd *cmd = NULL;
364 unsigned long lock_flags;
365
366 /* free cmd block list is protected by free_pool_lock */
367 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
368
369 if (!list_empty(&pinstance->free_cmd_pool)) {
370 cmd = list_entry(pinstance->free_cmd_pool.next,
371 struct pmcraid_cmd, free_list);
372 list_del(&cmd->free_list);
373 }
374 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
375
376 /* Initialize the command block before giving it the caller */
377 if (cmd != NULL)
378 pmcraid_reinit_cmdblk(cmd);
379 return cmd;
380}
381
382/**
383 * pmcraid_return_cmd - return a completed command block back into free pool
384 * @cmd: pointer to the command block
385 *
386 * Return Value:
387 * nothing
388 */
389static void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
390{
391 struct pmcraid_instance *pinstance = cmd->drv_inst;
392 unsigned long lock_flags;
393
394 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
395 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
396 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
397}
398
399/**
400 * pmcraid_read_interrupts - reads IOA interrupts
401 *
402 * @pinstance: pointer to adapter instance structure
403 *
404 * Return value
405 * interrupts read from IOA
406 */
407static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
408{
409 return (pinstance->interrupt_mode) ?
410 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
411 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
412}
413
414/**
415 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
416 *
417 * @pinstance: pointer to per adapter instance structure
418 * @intrs: interrupts to disable
419 *
420 * Return Value
421 * None
422 */
423static void pmcraid_disable_interrupts(
424 struct pmcraid_instance *pinstance,
425 u32 intrs
426)
427{
428 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
429 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
430
431 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
432 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
433 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
434
435 if (!pinstance->interrupt_mode) {
436 iowrite32(intrs,
437 pinstance->int_regs.ioa_host_interrupt_mask_reg);
438 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
439 }
440}
441
442/**
443 * pmcraid_enable_interrupts - Enables specified interrupts
444 *
445 * @pinstance: pointer to per adapter instance structure
446 * @intrs: interrupts to enable
447 *
448 * Return Value
449 * None
450 */
451static void pmcraid_enable_interrupts(
452 struct pmcraid_instance *pinstance,
453 u32 intrs)
454{
455 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
456 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
457
458 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
459
460 if (!pinstance->interrupt_mode) {
461 iowrite32(~intrs,
462 pinstance->int_regs.ioa_host_interrupt_mask_reg);
463 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
464 }
465
466 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
467 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
468 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
469}
470
471/**
472 * pmcraid_clr_trans_op - clear trans to op interrupt
473 *
474 * @pinstance: pointer to per adapter instance structure
475 *
476 * Return Value
477 * None
478 */
479static void pmcraid_clr_trans_op(
480 struct pmcraid_instance *pinstance
481)
482{
483 unsigned long lock_flags;
484
485 if (!pinstance->interrupt_mode) {
486 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
487 pinstance->int_regs.ioa_host_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
489 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
490 pinstance->int_regs.ioa_host_interrupt_clr_reg);
491 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
492 }
493
494 if (pinstance->reset_cmd != NULL) {
495 del_timer(&pinstance->reset_cmd->timer);
496 spin_lock_irqsave(
497 pinstance->host->host_lock, lock_flags);
498 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
499 spin_unlock_irqrestore(
500 pinstance->host->host_lock, lock_flags);
501 }
502}
503
504/**
505 * pmcraid_reset_type - Determine the required reset type
506 * @pinstance: pointer to adapter instance structure
507 *
508 * IOA requires hard reset if any of the following conditions is true.
509 * 1. If HRRQ valid interrupt is not masked
510 * 2. IOA reset alert doorbell is set
511 * 3. If there are any error interrupts
512 */
513static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
514{
515 u32 mask;
516 u32 intrs;
517 u32 alerts;
518
519 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
521 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
522
523 if ((mask & INTRS_HRRQ_VALID) == 0 ||
524 (alerts & DOORBELL_IOA_RESET_ALERT) ||
525 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
526 pmcraid_info("IOA requires hard reset\n");
527 pinstance->ioa_hard_reset = 1;
528 }
529
530 /* If unit check is active, trigger the dump */
531 if (intrs & INTRS_IOA_UNIT_CHECK)
532 pinstance->ioa_unit_check = 1;
533}
534
535static void pmcraid_ioa_reset(struct pmcraid_cmd *);
536/**
537 * pmcraid_bist_done - completion function for PCI BIST
538 * @t: pointer to reset command
539 * Return Value
540 * none
541 */
542static void pmcraid_bist_done(struct timer_list *t)
543{
544 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
545 struct pmcraid_instance *pinstance = cmd->drv_inst;
546 unsigned long lock_flags;
547 int rc;
548 u16 pci_reg;
549
550 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
551
552 /* If PCI config space can't be accessed wait for another two secs */
553 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
554 cmd->time_left > 0) {
555 pmcraid_info("BIST not complete, waiting another 2 secs\n");
556 cmd->timer.expires = jiffies + cmd->time_left;
557 cmd->time_left = 0;
558 add_timer(&cmd->timer);
559 } else {
560 cmd->time_left = 0;
561 pmcraid_info("BIST is complete, proceeding with reset\n");
562 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
563 pmcraid_ioa_reset(cmd);
564 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
565 }
566}
567
568/**
569 * pmcraid_start_bist - starts BIST
570 * @cmd: pointer to reset cmd
571 * Return Value
572 * none
573 */
574static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
575{
576 struct pmcraid_instance *pinstance = cmd->drv_inst;
577 u32 doorbells, intrs;
578
579 /* proceed with bist and wait for 2 seconds */
580 iowrite32(DOORBELL_IOA_START_BIST,
581 pinstance->int_regs.host_ioa_interrupt_reg);
582 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
583 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
584 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
585 doorbells, intrs);
586
587 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
588 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
589 cmd->timer.function = pmcraid_bist_done;
590 add_timer(&cmd->timer);
591}
592
593/**
594 * pmcraid_reset_alert_done - completion routine for reset_alert
595 * @t: pointer to command block used in reset sequence
596 * Return value
597 * None
598 */
599static void pmcraid_reset_alert_done(struct timer_list *t)
600{
601 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 u32 status = ioread32(pinstance->ioa_status);
604 unsigned long lock_flags;
605
606 /* if the critical operation in progress bit is set or the wait times
607 * out, invoke reset engine to proceed with hard reset. If there is
608 * some more time to wait, restart the timer
609 */
610 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
611 cmd->time_left <= 0) {
612 pmcraid_info("critical op is reset proceeding with reset\n");
613 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
614 pmcraid_ioa_reset(cmd);
615 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
616 } else {
617 pmcraid_info("critical op is not yet reset waiting again\n");
618 /* restart timer if some more time is available to wait */
619 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
620 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
621 cmd->timer.function = pmcraid_reset_alert_done;
622 add_timer(&cmd->timer);
623 }
624}
625
626static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
627/**
628 * pmcraid_reset_alert - alerts IOA for a possible reset
629 * @cmd: command block to be used for reset sequence.
630 *
631 * Return Value
632 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
633 * successfully written to IOA. Returns non-zero in case pci_config_space
634 * is not accessible
635 */
636static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
637{
638 struct pmcraid_instance *pinstance = cmd->drv_inst;
639 u32 doorbells;
640 int rc;
641 u16 pci_reg;
642
643 /* If we are able to access IOA PCI config space, alert IOA that we are
644 * going to reset it soon. This enables IOA to preserv persistent error
645 * data if any. In case memory space is not accessible, proceed with
646 * BIST or slot_reset
647 */
648 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
649 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
650
651 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
652 * reset IOA doesn't generate any interrupts when CRITICAL
653 * OPERATION bit is reset. A timer is started to wait for this
654 * bit to be reset.
655 */
656 cmd->time_left = PMCRAID_RESET_TIMEOUT;
657 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
658 cmd->timer.function = pmcraid_reset_alert_done;
659 add_timer(&cmd->timer);
660
661 iowrite32(DOORBELL_IOA_RESET_ALERT,
662 pinstance->int_regs.host_ioa_interrupt_reg);
663 doorbells =
664 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
665 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
666 } else {
667 pmcraid_info("PCI config is not accessible starting BIST\n");
668 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
669 pmcraid_start_bist(cmd);
670 }
671}
672
673/**
674 * pmcraid_timeout_handler - Timeout handler for internally generated ops
675 *
676 * @t: pointer to command structure, that got timedout
677 *
678 * This function blocks host requests and initiates an adapter reset.
679 *
680 * Return value:
681 * None
682 */
683static void pmcraid_timeout_handler(struct timer_list *t)
684{
685 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
686 struct pmcraid_instance *pinstance = cmd->drv_inst;
687 unsigned long lock_flags;
688
689 dev_info(&pinstance->pdev->dev,
690 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
691 cmd->ioa_cb->ioarcb.cdb[0]);
692
693 /* Command timeouts result in hard reset sequence. The command that got
694 * timed out may be the one used as part of reset sequence. In this
695 * case restart reset sequence using the same command block even if
696 * reset is in progress. Otherwise fail this command and get a free
697 * command block to restart the reset sequence.
698 */
699 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
700 if (!pinstance->ioa_reset_in_progress) {
701 pinstance->ioa_reset_attempts = 0;
702 cmd = pmcraid_get_free_cmd(pinstance);
703
704 /* If we are out of command blocks, just return here itself.
705 * Some other command's timeout handler can do the reset job
706 */
707 if (cmd == NULL) {
708 spin_unlock_irqrestore(pinstance->host->host_lock,
709 lock_flags);
710 pmcraid_err("no free cmnd block for timeout handler\n");
711 return;
712 }
713
714 pinstance->reset_cmd = cmd;
715 pinstance->ioa_reset_in_progress = 1;
716 } else {
717 pmcraid_info("reset is already in progress\n");
718
719 if (pinstance->reset_cmd != cmd) {
720 /* This command should have been given to IOA, this
721 * command will be completed by fail_outstanding_cmds
722 * anyway
723 */
724 pmcraid_err("cmd is pending but reset in progress\n");
725 }
726
727 /* If this command was being used as part of the reset
728 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
729 * causes fail_outstanding_commands not to return the command
730 * block back to free pool
731 */
732 if (cmd == pinstance->reset_cmd)
733 cmd->cmd_done = pmcraid_ioa_reset;
734 }
735
736 /* Notify apps of important IOA bringup/bringdown sequences */
737 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
738 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
739 pmcraid_notify_ioastate(pinstance,
740 PMC_DEVICE_EVENT_RESET_START);
741
742 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
743 scsi_block_requests(pinstance->host);
744 pmcraid_reset_alert(cmd);
745 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
746}
747
748/**
749 * pmcraid_internal_done - completion routine for internally generated cmds
750 *
751 * @cmd: command that got response from IOA
752 *
753 * Return Value:
754 * none
755 */
756static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
757{
758 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
759 cmd->ioa_cb->ioarcb.cdb[0],
760 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
761
762 /* Some of the internal commands are sent with callers blocking for the
763 * response. Same will be indicated as part of cmd->completion_req
764 * field. Response path needs to wake up any waiters waiting for cmd
765 * completion if this flag is set.
766 */
767 if (cmd->completion_req) {
768 cmd->completion_req = 0;
769 complete(&cmd->wait_for_completion);
770 }
771
772 /* most of the internal commands are completed by caller itself, so
773 * no need to return the command block back to free pool until we are
774 * required to do so (e.g once done with initialization).
775 */
776 if (cmd->release) {
777 cmd->release = 0;
778 pmcraid_return_cmd(cmd);
779 }
780}
781
782/**
783 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
784 *
785 * @cmd: command that got response from IOA
786 *
787 * This routine is called after driver re-reads configuration table due to a
788 * lost CCN. It returns the command block back to free pool and schedules
789 * worker thread to add/delete devices into the system.
790 *
791 * Return Value:
792 * none
793 */
794static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
795{
796 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
797 cmd->ioa_cb->ioarcb.cdb[0],
798 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
799
800 if (cmd->release) {
801 cmd->release = 0;
802 pmcraid_return_cmd(cmd);
803 }
804 pmcraid_info("scheduling worker for config table reinitialization\n");
805 schedule_work(&cmd->drv_inst->worker_q);
806}
807
808/**
809 * pmcraid_erp_done - Process completion of SCSI error response from device
810 * @cmd: pmcraid_command
811 *
812 * This function copies the sense buffer into the scsi_cmd struct and completes
813 * scsi_cmd by calling scsi_done function.
814 *
815 * Return value:
816 * none
817 */
818static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
819{
820 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
821 struct pmcraid_instance *pinstance = cmd->drv_inst;
822 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
823
824 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
825 scsi_cmd->result |= (DID_ERROR << 16);
826 scmd_printk(KERN_INFO, scsi_cmd,
827 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
828 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
829 }
830
831 if (cmd->sense_buffer) {
832 dma_unmap_single(&pinstance->pdev->dev, cmd->sense_buffer_dma,
833 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
834 cmd->sense_buffer = NULL;
835 cmd->sense_buffer_dma = 0;
836 }
837
838 scsi_dma_unmap(scsi_cmd);
839 pmcraid_return_cmd(cmd);
840 scsi_cmd->scsi_done(scsi_cmd);
841}
842
843/**
844 * _pmcraid_fire_command - sends an IOA command to adapter
845 *
846 * This function adds the given block into pending command list
847 * and returns without waiting
848 *
849 * @cmd : command to be sent to the device
850 *
851 * Return Value
852 * None
853 */
854static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
855{
856 struct pmcraid_instance *pinstance = cmd->drv_inst;
857 unsigned long lock_flags;
858
859 /* Add this command block to pending cmd pool. We do this prior to
860 * writting IOARCB to ioarrin because IOA might complete the command
861 * by the time we are about to add it to the list. Response handler
862 * (isr/tasklet) looks for cmd block in the pending pending list.
863 */
864 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
865 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
866 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
867 atomic_inc(&pinstance->outstanding_cmds);
868
869 /* driver writes lower 32-bit value of IOARCB address only */
870 mb();
871 iowrite32(le64_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), pinstance->ioarrin);
872}
873
874/**
875 * pmcraid_send_cmd - fires a command to IOA
876 *
877 * This function also sets up timeout function, and command completion
878 * function
879 *
880 * @cmd: pointer to the command block to be fired to IOA
881 * @cmd_done: command completion function, called once IOA responds
882 * @timeout: timeout to wait for this command completion
883 * @timeout_func: timeout handler
884 *
885 * Return value
886 * none
887 */
888static void pmcraid_send_cmd(
889 struct pmcraid_cmd *cmd,
890 void (*cmd_done) (struct pmcraid_cmd *),
891 unsigned long timeout,
892 void (*timeout_func) (struct timer_list *)
893)
894{
895 /* initialize done function */
896 cmd->cmd_done = cmd_done;
897
898 if (timeout_func) {
899 /* setup timeout handler */
900 cmd->timer.expires = jiffies + timeout;
901 cmd->timer.function = timeout_func;
902 add_timer(&cmd->timer);
903 }
904
905 /* fire the command to IOA */
906 _pmcraid_fire_command(cmd);
907}
908
909/**
910 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
911 * @cmd: pointer to the command block used for sending IOA shutdown command
912 *
913 * Return value
914 * None
915 */
916static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
917{
918 struct pmcraid_instance *pinstance = cmd->drv_inst;
919 unsigned long lock_flags;
920
921 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
922 pmcraid_ioa_reset(cmd);
923 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
924}
925
926/**
927 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
928 *
929 * @cmd: pointer to the command block used as part of reset sequence
930 *
931 * Return Value
932 * None
933 */
934static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
935{
936 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
937 cmd->ioa_cb->ioarcb.cdb[0],
938 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
939
940 /* Note that commands sent during reset require next command to be sent
941 * to IOA. Hence reinit the done function as well as timeout function
942 */
943 pmcraid_reinit_cmdblk(cmd);
944 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
945 cmd->ioa_cb->ioarcb.resource_handle =
946 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
947 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
948 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
949
950 /* fire shutdown command to hardware. */
951 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
952 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
953
954 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
955
956 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
957 PMCRAID_SHUTDOWN_TIMEOUT,
958 pmcraid_timeout_handler);
959}
960
961static void pmcraid_querycfg(struct pmcraid_cmd *);
962/**
963 * pmcraid_get_fwversion_done - completion function for get_fwversion
964 *
965 * @cmd: pointer to command block used to send INQUIRY command
966 *
967 * Return Value
968 * none
969 */
970static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
971{
972 struct pmcraid_instance *pinstance = cmd->drv_inst;
973 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
974 unsigned long lock_flags;
975
976 /* configuration table entry size depends on firmware version. If fw
977 * version is not known, it is not possible to interpret IOA config
978 * table
979 */
980 if (ioasc) {
981 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
982 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
983 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
984 pmcraid_reset_alert(cmd);
985 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
986 } else {
987 pmcraid_querycfg(cmd);
988 }
989}
990
991/**
992 * pmcraid_get_fwversion - reads firmware version information
993 *
994 * @cmd: pointer to command block used to send INQUIRY command
995 *
996 * Return Value
997 * none
998 */
999static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1000{
1001 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1002 struct pmcraid_ioadl_desc *ioadl;
1003 struct pmcraid_instance *pinstance = cmd->drv_inst;
1004 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1005
1006 pmcraid_reinit_cmdblk(cmd);
1007 ioarcb->request_type = REQ_TYPE_SCSI;
1008 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1009 ioarcb->cdb[0] = INQUIRY;
1010 ioarcb->cdb[1] = 1;
1011 ioarcb->cdb[2] = 0xD0;
1012 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1013 ioarcb->cdb[4] = data_size & 0xFF;
1014
1015 /* Since entire inquiry data it can be part of IOARCB itself
1016 */
1017 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1018 offsetof(struct pmcraid_ioarcb,
1019 add_data.u.ioadl[0]));
1020 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1021 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
1022
1023 ioarcb->request_flags0 |= NO_LINK_DESCS;
1024 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1025 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1026 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1027 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1028 ioadl->data_len = cpu_to_le32(data_size);
1029
1030 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1031 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1032}
1033
1034/**
1035 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1036 * @cmd: pointer to command block to be used for identify hrrq
1037 *
1038 * Return Value
1039 * none
1040 */
1041static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1042{
1043 struct pmcraid_instance *pinstance = cmd->drv_inst;
1044 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1045 int index = cmd->hrrq_index;
1046 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1047 __be32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1048 void (*done_function)(struct pmcraid_cmd *);
1049
1050 pmcraid_reinit_cmdblk(cmd);
1051 cmd->hrrq_index = index + 1;
1052
1053 if (cmd->hrrq_index < pinstance->num_hrrq) {
1054 done_function = pmcraid_identify_hrrq;
1055 } else {
1056 cmd->hrrq_index = 0;
1057 done_function = pmcraid_get_fwversion;
1058 }
1059
1060 /* Initialize ioarcb */
1061 ioarcb->request_type = REQ_TYPE_IOACMD;
1062 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1063
1064 /* initialize the hrrq number where IOA will respond to this command */
1065 ioarcb->hrrq_id = index;
1066 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1067 ioarcb->cdb[1] = index;
1068
1069 /* IOA expects 64-bit pci address to be written in B.E format
1070 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1071 */
1072 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1073 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1074
1075 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1076 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1077
1078 /* Subsequent commands require HRRQ identification to be successful.
1079 * Note that this gets called even during reset from SCSI mid-layer
1080 * or tasklet
1081 */
1082 pmcraid_send_cmd(cmd, done_function,
1083 PMCRAID_INTERNAL_TIMEOUT,
1084 pmcraid_timeout_handler);
1085}
1086
1087static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1088static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1089
1090/**
1091 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1092 *
1093 * @cmd: initialized command block pointer
1094 *
1095 * Return Value
1096 * none
1097 */
1098static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1099{
1100 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1101 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1102 else
1103 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1104
1105 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1106}
1107
1108/**
1109 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1110 *
1111 * @pinstance: pointer to adapter instance structure
1112 * @type: HCAM type
1113 *
1114 * Return Value
1115 * pointer to initialized pmcraid_cmd structure or NULL
1116 */
1117static struct pmcraid_cmd *pmcraid_init_hcam
1118(
1119 struct pmcraid_instance *pinstance,
1120 u8 type
1121)
1122{
1123 struct pmcraid_cmd *cmd;
1124 struct pmcraid_ioarcb *ioarcb;
1125 struct pmcraid_ioadl_desc *ioadl;
1126 struct pmcraid_hostrcb *hcam;
1127 void (*cmd_done) (struct pmcraid_cmd *);
1128 dma_addr_t dma;
1129 int rcb_size;
1130
1131 cmd = pmcraid_get_free_cmd(pinstance);
1132
1133 if (!cmd) {
1134 pmcraid_err("no free command blocks for hcam\n");
1135 return cmd;
1136 }
1137
1138 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1139 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1140 cmd_done = pmcraid_process_ccn;
1141 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1142 hcam = &pinstance->ccn;
1143 } else {
1144 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1145 cmd_done = pmcraid_process_ldn;
1146 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1147 hcam = &pinstance->ldn;
1148 }
1149
1150 /* initialize command pointer used for HCAM registration */
1151 hcam->cmd = cmd;
1152
1153 ioarcb = &cmd->ioa_cb->ioarcb;
1154 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1155 offsetof(struct pmcraid_ioarcb,
1156 add_data.u.ioadl[0]));
1157 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1158 ioadl = ioarcb->add_data.u.ioadl;
1159
1160 /* Initialize ioarcb */
1161 ioarcb->request_type = REQ_TYPE_HCAM;
1162 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1163 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1164 ioarcb->cdb[1] = type;
1165 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1166 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1167
1168 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1169
1170 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1171 ioadl[0].data_len = cpu_to_le32(rcb_size);
1172 ioadl[0].address = cpu_to_le64(dma);
1173
1174 cmd->cmd_done = cmd_done;
1175 return cmd;
1176}
1177
1178/**
1179 * pmcraid_send_hcam - Send an HCAM to IOA
1180 * @pinstance: ioa config struct
1181 * @type: HCAM type
1182 *
1183 * This function will send a Host Controlled Async command to IOA.
1184 *
1185 * Return value:
1186 * none
1187 */
1188static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1189{
1190 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1191 pmcraid_send_hcam_cmd(cmd);
1192}
1193
1194
1195/**
1196 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1197 *
1198 * @cmd: pointer to cmd that is used as cancelling command
1199 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1200 */
1201static void pmcraid_prepare_cancel_cmd(
1202 struct pmcraid_cmd *cmd,
1203 struct pmcraid_cmd *cmd_to_cancel
1204)
1205{
1206 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1207 __be64 ioarcb_addr;
1208
1209 /* IOARCB address of the command to be cancelled is given in
1210 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1211 * IOARCB address are not masked.
1212 */
1213 ioarcb_addr = cpu_to_be64(le64_to_cpu(cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr));
1214
1215 /* Get the resource handle to where the command to be aborted has been
1216 * sent.
1217 */
1218 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1219 ioarcb->request_type = REQ_TYPE_IOACMD;
1220 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1221 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1222
1223 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1224}
1225
1226/**
1227 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1228 *
1229 * @cmd: command to be used as cancelling command
1230 * @type: HCAM type
1231 * @cmd_done: op done function for the cancelling command
1232 */
1233static void pmcraid_cancel_hcam(
1234 struct pmcraid_cmd *cmd,
1235 u8 type,
1236 void (*cmd_done) (struct pmcraid_cmd *)
1237)
1238{
1239 struct pmcraid_instance *pinstance;
1240 struct pmcraid_hostrcb *hcam;
1241
1242 pinstance = cmd->drv_inst;
1243 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1244 &pinstance->ldn : &pinstance->ccn;
1245
1246 /* prepare for cancelling previous hcam command. If the HCAM is
1247 * currently not pending with IOA, we would have hcam->cmd as non-null
1248 */
1249 if (hcam->cmd == NULL)
1250 return;
1251
1252 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1253
1254 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1255 * schedule queuecommand while we are doing this
1256 */
1257 pmcraid_send_cmd(cmd, cmd_done,
1258 PMCRAID_INTERNAL_TIMEOUT,
1259 pmcraid_timeout_handler);
1260}
1261
1262/**
1263 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1264 *
1265 * @cmd: command block to be used for cancelling the HCAM
1266 */
1267static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1268{
1269 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1270 cmd->ioa_cb->ioarcb.cdb[0],
1271 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1272
1273 pmcraid_reinit_cmdblk(cmd);
1274
1275 pmcraid_cancel_hcam(cmd,
1276 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1277 pmcraid_ioa_shutdown);
1278}
1279
1280/**
1281 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1282 *
1283 * @cmd: command block to be used for cancelling the HCAM
1284 */
1285static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1286{
1287 pmcraid_cancel_hcam(cmd,
1288 PMCRAID_HCAM_CODE_LOG_DATA,
1289 pmcraid_cancel_ccn);
1290}
1291
1292/**
1293 * pmcraid_expose_resource - check if the resource can be exposed to OS
1294 *
1295 * @fw_version: firmware version code
1296 * @cfgte: pointer to configuration table entry of the resource
1297 *
1298 * Return value:
1299 * true if resource can be added to midlayer, false(0) otherwise
1300 */
1301static int pmcraid_expose_resource(u16 fw_version,
1302 struct pmcraid_config_table_entry *cfgte)
1303{
1304 int retval = 0;
1305
1306 if (cfgte->resource_type == RES_TYPE_VSET) {
1307 if (fw_version <= PMCRAID_FW_VERSION_1)
1308 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1309 else
1310 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1311 (cfgte->unique_flags1 & 0x80) == 0);
1312
1313 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1314 retval = (RES_BUS(cfgte->resource_address) !=
1315 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1316 return retval;
1317}
1318
1319/* attributes supported by pmcraid_event_family */
1320enum {
1321 PMCRAID_AEN_ATTR_UNSPEC,
1322 PMCRAID_AEN_ATTR_EVENT,
1323 __PMCRAID_AEN_ATTR_MAX,
1324};
1325#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1326
1327/* commands supported by pmcraid_event_family */
1328enum {
1329 PMCRAID_AEN_CMD_UNSPEC,
1330 PMCRAID_AEN_CMD_EVENT,
1331 __PMCRAID_AEN_CMD_MAX,
1332};
1333#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1334
1335static struct genl_multicast_group pmcraid_mcgrps[] = {
1336 { .name = "events", /* not really used - see ID discussion below */ },
1337};
1338
1339static struct genl_family pmcraid_event_family __ro_after_init = {
1340 .module = THIS_MODULE,
1341 .name = "pmcraid",
1342 .version = 1,
1343 .maxattr = PMCRAID_AEN_ATTR_MAX,
1344 .mcgrps = pmcraid_mcgrps,
1345 .n_mcgrps = ARRAY_SIZE(pmcraid_mcgrps),
1346};
1347
1348/**
1349 * pmcraid_netlink_init - registers pmcraid_event_family
1350 *
1351 * Return value:
1352 * 0 if the pmcraid_event_family is successfully registered
1353 * with netlink generic, non-zero otherwise
1354 */
1355static int __init pmcraid_netlink_init(void)
1356{
1357 int result;
1358
1359 result = genl_register_family(&pmcraid_event_family);
1360
1361 if (result)
1362 return result;
1363
1364 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1365 pmcraid_event_family.id);
1366
1367 return result;
1368}
1369
1370/**
1371 * pmcraid_netlink_release - unregisters pmcraid_event_family
1372 *
1373 * Return value:
1374 * none
1375 */
1376static void pmcraid_netlink_release(void)
1377{
1378 genl_unregister_family(&pmcraid_event_family);
1379}
1380
1381/*
1382 * pmcraid_notify_aen - sends event msg to user space application
1383 * @pinstance: pointer to adapter instance structure
1384 *
1385 * Return value:
1386 * 0 if success, error value in case of any failure.
1387 */
1388static int pmcraid_notify_aen(
1389 struct pmcraid_instance *pinstance,
1390 struct pmcraid_aen_msg *aen_msg,
1391 u32 data_size)
1392{
1393 struct sk_buff *skb;
1394 void *msg_header;
1395 u32 total_size, nla_genl_hdr_total_size;
1396 int result;
1397
1398 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1399 MINOR(pinstance->cdev.dev));
1400 aen_msg->length = data_size;
1401
1402 data_size += sizeof(*aen_msg);
1403
1404 total_size = nla_total_size(data_size);
1405 /* Add GENL_HDR to total_size */
1406 nla_genl_hdr_total_size =
1407 (total_size + (GENL_HDRLEN +
1408 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1409 + NLMSG_HDRLEN);
1410 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1411
1412
1413 if (!skb) {
1414 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1415 total_size);
1416 return -ENOMEM;
1417 }
1418
1419 /* add the genetlink message header */
1420 msg_header = genlmsg_put(skb, 0, 0,
1421 &pmcraid_event_family, 0,
1422 PMCRAID_AEN_CMD_EVENT);
1423 if (!msg_header) {
1424 pmcraid_err("failed to copy command details\n");
1425 nlmsg_free(skb);
1426 return -ENOMEM;
1427 }
1428
1429 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1430
1431 if (result) {
1432 pmcraid_err("failed to copy AEN attribute data\n");
1433 nlmsg_free(skb);
1434 return -EINVAL;
1435 }
1436
1437 /* send genetlink multicast message to notify appplications */
1438 genlmsg_end(skb, msg_header);
1439
1440 result = genlmsg_multicast(&pmcraid_event_family, skb,
1441 0, 0, GFP_ATOMIC);
1442
1443 /* If there are no listeners, genlmsg_multicast may return non-zero
1444 * value.
1445 */
1446 if (result)
1447 pmcraid_info("error (%x) sending aen event message\n", result);
1448 return result;
1449}
1450
1451/**
1452 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1453 * @pinstance: pointer adapter instance structure
1454 *
1455 * Return value:
1456 * 0 if success, error value in case of any failure
1457 */
1458static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1459{
1460 return pmcraid_notify_aen(pinstance,
1461 pinstance->ccn.msg,
1462 le32_to_cpu(pinstance->ccn.hcam->data_len) +
1463 sizeof(struct pmcraid_hcam_hdr));
1464}
1465
1466/**
1467 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1468 * @pinstance: pointer adapter instance structure
1469 *
1470 * Return value:
1471 * 0 if success, error value in case of any failure
1472 */
1473static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1474{
1475 return pmcraid_notify_aen(pinstance,
1476 pinstance->ldn.msg,
1477 le32_to_cpu(pinstance->ldn.hcam->data_len) +
1478 sizeof(struct pmcraid_hcam_hdr));
1479}
1480
1481/**
1482 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1483 * @pinstance: pointer adapter instance structure
1484 * @evt: controller state event to be sent
1485 *
1486 * Return value:
1487 * 0 if success, error value in case of any failure
1488 */
1489static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1490{
1491 pinstance->scn.ioa_state = evt;
1492 pmcraid_notify_aen(pinstance,
1493 &pinstance->scn.msg,
1494 sizeof(u32));
1495}
1496
1497/**
1498 * pmcraid_handle_config_change - Handle a config change from the adapter
1499 * @pinstance: pointer to per adapter instance structure
1500 *
1501 * Return value:
1502 * none
1503 */
1504
1505static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1506{
1507 struct pmcraid_config_table_entry *cfg_entry;
1508 struct pmcraid_hcam_ccn *ccn_hcam;
1509 struct pmcraid_cmd *cmd;
1510 struct pmcraid_cmd *cfgcmd;
1511 struct pmcraid_resource_entry *res = NULL;
1512 unsigned long lock_flags;
1513 unsigned long host_lock_flags;
1514 u32 new_entry = 1;
1515 u32 hidden_entry = 0;
1516 u16 fw_version;
1517 int rc;
1518
1519 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1520 cfg_entry = &ccn_hcam->cfg_entry;
1521 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1522
1523 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1524 res: %x:%x:%x:%x\n",
1525 le32_to_cpu(pinstance->ccn.hcam->ilid),
1526 pinstance->ccn.hcam->op_code,
1527 (le32_to_cpu(pinstance->ccn.hcam->timestamp1) |
1528 ((le32_to_cpu(pinstance->ccn.hcam->timestamp2) & 0xffffffffLL) << 32)),
1529 pinstance->ccn.hcam->notification_type,
1530 pinstance->ccn.hcam->notification_lost,
1531 pinstance->ccn.hcam->flags,
1532 pinstance->host->unique_id,
1533 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1534 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1535 RES_BUS(cfg_entry->resource_address)),
1536 RES_IS_VSET(*cfg_entry) ?
1537 (fw_version <= PMCRAID_FW_VERSION_1 ?
1538 cfg_entry->unique_flags1 :
1539 le16_to_cpu(cfg_entry->array_id) & 0xFF) :
1540 RES_TARGET(cfg_entry->resource_address),
1541 RES_LUN(cfg_entry->resource_address));
1542
1543
1544 /* If this HCAM indicates a lost notification, read the config table */
1545 if (pinstance->ccn.hcam->notification_lost) {
1546 cfgcmd = pmcraid_get_free_cmd(pinstance);
1547 if (cfgcmd) {
1548 pmcraid_info("lost CCN, reading config table\b");
1549 pinstance->reinit_cfg_table = 1;
1550 pmcraid_querycfg(cfgcmd);
1551 } else {
1552 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1553 }
1554 goto out_notify_apps;
1555 }
1556
1557 /* If this resource is not going to be added to mid-layer, just notify
1558 * applications and return. If this notification is about hiding a VSET
1559 * resource, check if it was exposed already.
1560 */
1561 if (pinstance->ccn.hcam->notification_type ==
1562 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1563 cfg_entry->resource_type == RES_TYPE_VSET) {
1564 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1565 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1566 goto out_notify_apps;
1567 }
1568
1569 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1570 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1571 rc = memcmp(&res->cfg_entry.resource_address,
1572 &cfg_entry->resource_address,
1573 sizeof(cfg_entry->resource_address));
1574 if (!rc) {
1575 new_entry = 0;
1576 break;
1577 }
1578 }
1579
1580 if (new_entry) {
1581
1582 if (hidden_entry) {
1583 spin_unlock_irqrestore(&pinstance->resource_lock,
1584 lock_flags);
1585 goto out_notify_apps;
1586 }
1587
1588 /* If there are more number of resources than what driver can
1589 * manage, do not notify the applications about the CCN. Just
1590 * ignore this notifications and re-register the same HCAM
1591 */
1592 if (list_empty(&pinstance->free_res_q)) {
1593 spin_unlock_irqrestore(&pinstance->resource_lock,
1594 lock_flags);
1595 pmcraid_err("too many resources attached\n");
1596 spin_lock_irqsave(pinstance->host->host_lock,
1597 host_lock_flags);
1598 pmcraid_send_hcam(pinstance,
1599 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1600 spin_unlock_irqrestore(pinstance->host->host_lock,
1601 host_lock_flags);
1602 return;
1603 }
1604
1605 res = list_entry(pinstance->free_res_q.next,
1606 struct pmcraid_resource_entry, queue);
1607
1608 list_del(&res->queue);
1609 res->scsi_dev = NULL;
1610 res->reset_progress = 0;
1611 list_add_tail(&res->queue, &pinstance->used_res_q);
1612 }
1613
1614 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1615
1616 if (pinstance->ccn.hcam->notification_type ==
1617 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1618 if (res->scsi_dev) {
1619 if (fw_version <= PMCRAID_FW_VERSION_1)
1620 res->cfg_entry.unique_flags1 &= 0x7F;
1621 else
1622 res->cfg_entry.array_id &= cpu_to_le16(0xFF);
1623 res->change_detected = RES_CHANGE_DEL;
1624 res->cfg_entry.resource_handle =
1625 PMCRAID_INVALID_RES_HANDLE;
1626 schedule_work(&pinstance->worker_q);
1627 } else {
1628 /* This may be one of the non-exposed resources */
1629 list_move_tail(&res->queue, &pinstance->free_res_q);
1630 }
1631 } else if (!res->scsi_dev) {
1632 res->change_detected = RES_CHANGE_ADD;
1633 schedule_work(&pinstance->worker_q);
1634 }
1635 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1636
1637out_notify_apps:
1638
1639 /* Notify configuration changes to registered applications.*/
1640 if (!pmcraid_disable_aen)
1641 pmcraid_notify_ccn(pinstance);
1642
1643 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1644 if (cmd)
1645 pmcraid_send_hcam_cmd(cmd);
1646}
1647
1648/**
1649 * pmcraid_get_error_info - return error string for an ioasc
1650 * @ioasc: ioasc code
1651 * Return Value
1652 * none
1653 */
1654static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1655{
1656 int i;
1657 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1658 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1659 return &pmcraid_ioasc_error_table[i];
1660 }
1661 return NULL;
1662}
1663
1664/**
1665 * pmcraid_ioasc_logger - log IOASC information based user-settings
1666 * @ioasc: ioasc code
1667 * @cmd: pointer to command that resulted in 'ioasc'
1668 */
1669static void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1670{
1671 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1672
1673 if (error_info == NULL ||
1674 cmd->drv_inst->current_log_level < error_info->log_level)
1675 return;
1676
1677 /* log the error string */
1678 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1679 cmd->ioa_cb->ioarcb.cdb[0],
1680 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
1681 ioasc, error_info->error_string);
1682}
1683
1684/**
1685 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1686 *
1687 * @pinstance: pointer to per adapter instance structure
1688 *
1689 * Return value:
1690 * none
1691 */
1692static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1693{
1694 struct pmcraid_hcam_ldn *hcam_ldn;
1695 u32 ioasc;
1696
1697 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1698
1699 pmcraid_info
1700 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1701 pinstance->ldn.hcam->ilid,
1702 pinstance->ldn.hcam->op_code,
1703 pinstance->ldn.hcam->notification_type,
1704 pinstance->ldn.hcam->notification_lost,
1705 pinstance->ldn.hcam->flags,
1706 pinstance->ldn.hcam->overlay_id);
1707
1708 /* log only the errors, no need to log informational log entries */
1709 if (pinstance->ldn.hcam->notification_type !=
1710 NOTIFICATION_TYPE_ERROR_LOG)
1711 return;
1712
1713 if (pinstance->ldn.hcam->notification_lost ==
1714 HOSTRCB_NOTIFICATIONS_LOST)
1715 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1716
1717 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1718
1719 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1720 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1721 dev_info(&pinstance->pdev->dev,
1722 "UnitAttention due to IOA Bus Reset\n");
1723 scsi_report_bus_reset(
1724 pinstance->host,
1725 RES_BUS(hcam_ldn->error_log.fd_ra));
1726 }
1727
1728 return;
1729}
1730
1731/**
1732 * pmcraid_process_ccn - Op done function for a CCN.
1733 * @cmd: pointer to command struct
1734 *
1735 * This function is the op done function for a configuration
1736 * change notification
1737 *
1738 * Return value:
1739 * none
1740 */
1741static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1742{
1743 struct pmcraid_instance *pinstance = cmd->drv_inst;
1744 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1745 unsigned long lock_flags;
1746
1747 pinstance->ccn.cmd = NULL;
1748 pmcraid_return_cmd(cmd);
1749
1750 /* If driver initiated IOA reset happened while this hcam was pending
1751 * with IOA, or IOA bringdown sequence is in progress, no need to
1752 * re-register the hcam
1753 */
1754 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1755 atomic_read(&pinstance->ccn.ignore) == 1) {
1756 return;
1757 } else if (ioasc) {
1758 dev_info(&pinstance->pdev->dev,
1759 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1760 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1761 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1762 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1763 } else {
1764 pmcraid_handle_config_change(pinstance);
1765 }
1766}
1767
1768static void pmcraid_initiate_reset(struct pmcraid_instance *);
1769static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1770/**
1771 * pmcraid_process_ldn - op done function for an LDN
1772 * @cmd: pointer to command block
1773 *
1774 * Return value
1775 * none
1776 */
1777static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1778{
1779 struct pmcraid_instance *pinstance = cmd->drv_inst;
1780 struct pmcraid_hcam_ldn *ldn_hcam =
1781 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1782 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1783 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1784 unsigned long lock_flags;
1785
1786 /* return the command block back to freepool */
1787 pinstance->ldn.cmd = NULL;
1788 pmcraid_return_cmd(cmd);
1789
1790 /* If driver initiated IOA reset happened while this hcam was pending
1791 * with IOA, no need to re-register the hcam as reset engine will do it
1792 * once reset sequence is complete
1793 */
1794 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1795 atomic_read(&pinstance->ccn.ignore) == 1) {
1796 return;
1797 } else if (!ioasc) {
1798 pmcraid_handle_error_log(pinstance);
1799 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1800 spin_lock_irqsave(pinstance->host->host_lock,
1801 lock_flags);
1802 pmcraid_initiate_reset(pinstance);
1803 spin_unlock_irqrestore(pinstance->host->host_lock,
1804 lock_flags);
1805 return;
1806 }
1807 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1808 pinstance->timestamp_error = 1;
1809 pmcraid_set_timestamp(cmd);
1810 }
1811 } else {
1812 dev_info(&pinstance->pdev->dev,
1813 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1814 }
1815 /* send netlink message for HCAM notification if enabled */
1816 if (!pmcraid_disable_aen)
1817 pmcraid_notify_ldn(pinstance);
1818
1819 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1820 if (cmd)
1821 pmcraid_send_hcam_cmd(cmd);
1822}
1823
1824/**
1825 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1826 *
1827 * @pinstance: pointer per adapter instance structure
1828 *
1829 * Return Value
1830 * none
1831 */
1832static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1833{
1834 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1835 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1836}
1837
1838/**
1839 * pmcraid_unregister_hcams - cancel HCAMs registered already
1840 * @cmd: pointer to command used as part of reset sequence
1841 */
1842static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1843{
1844 struct pmcraid_instance *pinstance = cmd->drv_inst;
1845
1846 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1847 * handling hcam response though it is not necessary. In order to
1848 * prevent this, set 'ignore', so that bring-down sequence doesn't
1849 * re-send any more hcams
1850 */
1851 atomic_set(&pinstance->ccn.ignore, 1);
1852 atomic_set(&pinstance->ldn.ignore, 1);
1853
1854 /* If adapter reset was forced as part of runtime reset sequence,
1855 * start the reset sequence. Reset will be triggered even in case
1856 * IOA unit_check.
1857 */
1858 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1859 pinstance->ioa_unit_check) {
1860 pinstance->force_ioa_reset = 0;
1861 pinstance->ioa_unit_check = 0;
1862 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1863 pmcraid_reset_alert(cmd);
1864 return;
1865 }
1866
1867 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1868 * one after the other. So CCN cancellation will be triggered by
1869 * pmcraid_cancel_ldn itself.
1870 */
1871 pmcraid_cancel_ldn(cmd);
1872}
1873
1874static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1875
1876/**
1877 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1878 * @pinstance: pointer to adapter instance structure
1879 * Return Value
1880 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1881 */
1882static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1883{
1884 u32 intrs;
1885
1886 pmcraid_reinit_buffers(pinstance);
1887 intrs = pmcraid_read_interrupts(pinstance);
1888
1889 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1890
1891 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1892 if (!pinstance->interrupt_mode) {
1893 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1894 pinstance->int_regs.
1895 ioa_host_interrupt_mask_reg);
1896 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1897 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1898 }
1899 return 1;
1900 } else {
1901 return 0;
1902 }
1903}
1904
1905/**
1906 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1907 * @cmd : pointer to reset command block
1908 *
1909 * Return Value
1910 * none
1911 */
1912static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1913{
1914 struct pmcraid_instance *pinstance = cmd->drv_inst;
1915 u32 int_reg;
1916 u32 doorbell;
1917
1918 /* There will be an interrupt when Transition to Operational bit is
1919 * set so tasklet would execute next reset task. The timeout handler
1920 * would re-initiate a reset
1921 */
1922 cmd->cmd_done = pmcraid_ioa_reset;
1923 cmd->timer.expires = jiffies +
1924 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
1925 cmd->timer.function = pmcraid_timeout_handler;
1926
1927 if (!timer_pending(&cmd->timer))
1928 add_timer(&cmd->timer);
1929
1930 /* Enable destructive diagnostics on IOA if it is not yet in
1931 * operational state
1932 */
1933 doorbell = DOORBELL_RUNTIME_RESET |
1934 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
1935
1936 /* Since we do RESET_ALERT and Start BIST we have to again write
1937 * MSIX Doorbell to indicate the interrupt mode
1938 */
1939 if (pinstance->interrupt_mode) {
1940 iowrite32(DOORBELL_INTR_MODE_MSIX,
1941 pinstance->int_regs.host_ioa_interrupt_reg);
1942 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
1943 }
1944
1945 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
1946 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1947 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
1948
1949 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
1950 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1951 int_reg);
1952}
1953
1954/**
1955 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
1956 *
1957 * @pinstance: pointer to adapter instance structure
1958 *
1959 * Return Value
1960 * none
1961 */
1962static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
1963{
1964 pmcraid_info("%s is not yet implemented\n", __func__);
1965}
1966
1967/**
1968 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
1969 * @pinstance: pointer to adapter instance structure
1970 *
1971 * This function fails all outstanding ops. If they are submitted to IOA
1972 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
1973 * otherwise just completes the commands and returns the cmd blocks to free
1974 * pool.
1975 *
1976 * Return value:
1977 * none
1978 */
1979static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
1980{
1981 struct pmcraid_cmd *cmd, *temp;
1982 unsigned long lock_flags;
1983
1984 /* pending command list is protected by pending_pool_lock. Its
1985 * traversal must be done as within this lock
1986 */
1987 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
1988 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
1989 free_list) {
1990 list_del(&cmd->free_list);
1991 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
1992 lock_flags);
1993 cmd->ioa_cb->ioasa.ioasc =
1994 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
1995 cmd->ioa_cb->ioasa.ilid =
1996 cpu_to_le32(PMCRAID_DRIVER_ILID);
1997
1998 /* In case the command timer is still running */
1999 del_timer(&cmd->timer);
2000
2001 /* If this is an IO command, complete it by invoking scsi_done
2002 * function. If this is one of the internal commands other
2003 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2004 * complete it
2005 */
2006 if (cmd->scsi_cmd) {
2007
2008 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2009 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2010
2011 scsi_cmd->result |= DID_ERROR << 16;
2012
2013 scsi_dma_unmap(scsi_cmd);
2014 pmcraid_return_cmd(cmd);
2015
2016 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2017 le32_to_cpu(resp) >> 2,
2018 cmd->ioa_cb->ioarcb.cdb[0],
2019 scsi_cmd->result);
2020 scsi_cmd->scsi_done(scsi_cmd);
2021 } else if (cmd->cmd_done == pmcraid_internal_done ||
2022 cmd->cmd_done == pmcraid_erp_done) {
2023 cmd->cmd_done(cmd);
2024 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2025 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2026 pmcraid_return_cmd(cmd);
2027 }
2028
2029 atomic_dec(&pinstance->outstanding_cmds);
2030 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2031 }
2032
2033 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2034}
2035
2036/**
2037 * pmcraid_ioa_reset - Implementation of IOA reset logic
2038 *
2039 * @cmd: pointer to the cmd block to be used for entire reset process
2040 *
2041 * This function executes most of the steps required for IOA reset. This gets
2042 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2043 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2044 * synchronized using host lock. Various functions called during reset process
2045 * would make use of a single command block, pointer to which is also stored in
2046 * adapter instance structure.
2047 *
2048 * Return Value
2049 * None
2050 */
2051static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2052{
2053 struct pmcraid_instance *pinstance = cmd->drv_inst;
2054 u8 reset_complete = 0;
2055
2056 pinstance->ioa_reset_in_progress = 1;
2057
2058 if (pinstance->reset_cmd != cmd) {
2059 pmcraid_err("reset is called with different command block\n");
2060 pinstance->reset_cmd = cmd;
2061 }
2062
2063 pmcraid_info("reset_engine: state = %d, command = %p\n",
2064 pinstance->ioa_state, cmd);
2065
2066 switch (pinstance->ioa_state) {
2067
2068 case IOA_STATE_DEAD:
2069 /* If IOA is offline, whatever may be the reset reason, just
2070 * return. callers might be waiting on the reset wait_q, wake
2071 * up them
2072 */
2073 pmcraid_err("IOA is offline no reset is possible\n");
2074 reset_complete = 1;
2075 break;
2076
2077 case IOA_STATE_IN_BRINGDOWN:
2078 /* we enter here, once ioa shutdown command is processed by IOA
2079 * Alert IOA for a possible reset. If reset alert fails, IOA
2080 * goes through hard-reset
2081 */
2082 pmcraid_disable_interrupts(pinstance, ~0);
2083 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2084 pmcraid_reset_alert(cmd);
2085 break;
2086
2087 case IOA_STATE_UNKNOWN:
2088 /* We may be called during probe or resume. Some pre-processing
2089 * is required for prior to reset
2090 */
2091 scsi_block_requests(pinstance->host);
2092
2093 /* If asked to reset while IOA was processing responses or
2094 * there are any error responses then IOA may require
2095 * hard-reset.
2096 */
2097 if (pinstance->ioa_hard_reset == 0) {
2098 if (ioread32(pinstance->ioa_status) &
2099 INTRS_TRANSITION_TO_OPERATIONAL) {
2100 pmcraid_info("sticky bit set, bring-up\n");
2101 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2102 pmcraid_reinit_cmdblk(cmd);
2103 pmcraid_identify_hrrq(cmd);
2104 } else {
2105 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2106 pmcraid_soft_reset(cmd);
2107 }
2108 } else {
2109 /* Alert IOA of a possible reset and wait for critical
2110 * operation in progress bit to reset
2111 */
2112 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2113 pmcraid_reset_alert(cmd);
2114 }
2115 break;
2116
2117 case IOA_STATE_IN_RESET_ALERT:
2118 /* If critical operation in progress bit is reset or wait gets
2119 * timed out, reset proceeds with starting BIST on the IOA.
2120 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2121 * they are 3 or more, reset engine marks IOA dead and returns
2122 */
2123 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2124 pmcraid_start_bist(cmd);
2125 break;
2126
2127 case IOA_STATE_IN_HARD_RESET:
2128 pinstance->ioa_reset_attempts++;
2129
2130 /* retry reset if we haven't reached maximum allowed limit */
2131 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2132 pinstance->ioa_reset_attempts = 0;
2133 pmcraid_err("IOA didn't respond marking it as dead\n");
2134 pinstance->ioa_state = IOA_STATE_DEAD;
2135
2136 if (pinstance->ioa_bringdown)
2137 pmcraid_notify_ioastate(pinstance,
2138 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2139 else
2140 pmcraid_notify_ioastate(pinstance,
2141 PMC_DEVICE_EVENT_RESET_FAILED);
2142 reset_complete = 1;
2143 break;
2144 }
2145
2146 /* Once either bist or pci reset is done, restore PCI config
2147 * space. If this fails, proceed with hard reset again
2148 */
2149 pci_restore_state(pinstance->pdev);
2150
2151 /* fail all pending commands */
2152 pmcraid_fail_outstanding_cmds(pinstance);
2153
2154 /* check if unit check is active, if so extract dump */
2155 if (pinstance->ioa_unit_check) {
2156 pmcraid_info("unit check is active\n");
2157 pinstance->ioa_unit_check = 0;
2158 pmcraid_get_dump(pinstance);
2159 pinstance->ioa_reset_attempts--;
2160 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2161 pmcraid_reset_alert(cmd);
2162 break;
2163 }
2164
2165 /* if the reset reason is to bring-down the ioa, we might be
2166 * done with the reset restore pci_config_space and complete
2167 * the reset
2168 */
2169 if (pinstance->ioa_bringdown) {
2170 pmcraid_info("bringing down the adapter\n");
2171 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2172 pinstance->ioa_bringdown = 0;
2173 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2174 pmcraid_notify_ioastate(pinstance,
2175 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2176 reset_complete = 1;
2177 } else {
2178 /* bring-up IOA, so proceed with soft reset
2179 * Reinitialize hrrq_buffers and their indices also
2180 * enable interrupts after a pci_restore_state
2181 */
2182 if (pmcraid_reset_enable_ioa(pinstance)) {
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_info("bringing up the adapter\n");
2185 pmcraid_reinit_cmdblk(cmd);
2186 pmcraid_identify_hrrq(cmd);
2187 } else {
2188 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2189 pmcraid_soft_reset(cmd);
2190 }
2191 }
2192 break;
2193
2194 case IOA_STATE_IN_SOFT_RESET:
2195 /* TRANSITION TO OPERATIONAL is on so start initialization
2196 * sequence
2197 */
2198 pmcraid_info("In softreset proceeding with bring-up\n");
2199 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2200
2201 /* Initialization commands start with HRRQ identification. From
2202 * now on tasklet completes most of the commands as IOA is up
2203 * and intrs are enabled
2204 */
2205 pmcraid_identify_hrrq(cmd);
2206 break;
2207
2208 case IOA_STATE_IN_BRINGUP:
2209 /* we are done with bringing up of IOA, change the ioa_state to
2210 * operational and wake up any waiters
2211 */
2212 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2213 reset_complete = 1;
2214 break;
2215
2216 case IOA_STATE_OPERATIONAL:
2217 default:
2218 /* When IOA is operational and a reset is requested, check for
2219 * the reset reason. If reset is to bring down IOA, unregister
2220 * HCAMs and initiate shutdown; if adapter reset is forced then
2221 * restart reset sequence again
2222 */
2223 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2224 pinstance->force_ioa_reset == 0) {
2225 pmcraid_notify_ioastate(pinstance,
2226 PMC_DEVICE_EVENT_RESET_SUCCESS);
2227 reset_complete = 1;
2228 } else {
2229 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2230 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2231 pmcraid_reinit_cmdblk(cmd);
2232 pmcraid_unregister_hcams(cmd);
2233 }
2234 break;
2235 }
2236
2237 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2238 * OPERATIONAL. Reset all control variables used during reset, wake up
2239 * any waiting threads and let the SCSI mid-layer send commands. Note
2240 * that host_lock must be held before invoking scsi_report_bus_reset.
2241 */
2242 if (reset_complete) {
2243 pinstance->ioa_reset_in_progress = 0;
2244 pinstance->ioa_reset_attempts = 0;
2245 pinstance->reset_cmd = NULL;
2246 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2247 pinstance->ioa_bringdown = 0;
2248 pmcraid_return_cmd(cmd);
2249
2250 /* If target state is to bring up the adapter, proceed with
2251 * hcam registration and resource exposure to mid-layer.
2252 */
2253 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2254 pmcraid_register_hcams(pinstance);
2255
2256 wake_up_all(&pinstance->reset_wait_q);
2257 }
2258
2259 return;
2260}
2261
2262/**
2263 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2264 * ISR/tasklet during error interrupts including IOA unit check. If reset
2265 * is already in progress, it just returns, otherwise initiates IOA reset
2266 * to bring IOA up to operational state.
2267 *
2268 * @pinstance: pointer to adapter instance structure
2269 *
2270 * Return value
2271 * none
2272 */
2273static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2274{
2275 struct pmcraid_cmd *cmd;
2276
2277 /* If the reset is already in progress, just return, otherwise start
2278 * reset sequence and return
2279 */
2280 if (!pinstance->ioa_reset_in_progress) {
2281 scsi_block_requests(pinstance->host);
2282 cmd = pmcraid_get_free_cmd(pinstance);
2283
2284 if (cmd == NULL) {
2285 pmcraid_err("no cmnd blocks for initiate_reset\n");
2286 return;
2287 }
2288
2289 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2290 pinstance->reset_cmd = cmd;
2291 pinstance->force_ioa_reset = 1;
2292 pmcraid_notify_ioastate(pinstance,
2293 PMC_DEVICE_EVENT_RESET_START);
2294 pmcraid_ioa_reset(cmd);
2295 }
2296}
2297
2298/**
2299 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2300 * or bringdown IOA
2301 * @pinstance: pointer adapter instance structure
2302 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2303 * @target_state: expected target state after reset
2304 *
2305 * Note: This command initiates reset and waits for its completion. Hence this
2306 * should not be called from isr/timer/tasklet functions (timeout handlers,
2307 * error response handlers and interrupt handlers).
2308 *
2309 * Return Value
2310 * 1 in case ioa_state is not target_state, 0 otherwise.
2311 */
2312static int pmcraid_reset_reload(
2313 struct pmcraid_instance *pinstance,
2314 u8 shutdown_type,
2315 u8 target_state
2316)
2317{
2318 struct pmcraid_cmd *reset_cmd = NULL;
2319 unsigned long lock_flags;
2320 int reset = 1;
2321
2322 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2323
2324 if (pinstance->ioa_reset_in_progress) {
2325 pmcraid_info("reset_reload: reset is already in progress\n");
2326
2327 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2328
2329 wait_event(pinstance->reset_wait_q,
2330 !pinstance->ioa_reset_in_progress);
2331
2332 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2333
2334 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2335 pmcraid_info("reset_reload: IOA is dead\n");
2336 goto out_unlock;
2337 }
2338
2339 if (pinstance->ioa_state == target_state) {
2340 reset = 0;
2341 goto out_unlock;
2342 }
2343 }
2344
2345 pmcraid_info("reset_reload: proceeding with reset\n");
2346 scsi_block_requests(pinstance->host);
2347 reset_cmd = pmcraid_get_free_cmd(pinstance);
2348 if (reset_cmd == NULL) {
2349 pmcraid_err("no free cmnd for reset_reload\n");
2350 goto out_unlock;
2351 }
2352
2353 if (shutdown_type == SHUTDOWN_NORMAL)
2354 pinstance->ioa_bringdown = 1;
2355
2356 pinstance->ioa_shutdown_type = shutdown_type;
2357 pinstance->reset_cmd = reset_cmd;
2358 pinstance->force_ioa_reset = reset;
2359 pmcraid_info("reset_reload: initiating reset\n");
2360 pmcraid_ioa_reset(reset_cmd);
2361 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2362 pmcraid_info("reset_reload: waiting for reset to complete\n");
2363 wait_event(pinstance->reset_wait_q,
2364 !pinstance->ioa_reset_in_progress);
2365
2366 pmcraid_info("reset_reload: reset is complete !!\n");
2367 scsi_unblock_requests(pinstance->host);
2368 return pinstance->ioa_state != target_state;
2369
2370out_unlock:
2371 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2372 return reset;
2373}
2374
2375/**
2376 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2377 *
2378 * @pinstance: pointer to adapter instance structure
2379 *
2380 * Return Value
2381 * whatever is returned from pmcraid_reset_reload
2382 */
2383static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2384{
2385 return pmcraid_reset_reload(pinstance,
2386 SHUTDOWN_NORMAL,
2387 IOA_STATE_UNKNOWN);
2388}
2389
2390/**
2391 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2392 *
2393 * @pinstance: pointer to adapter instance structure
2394 *
2395 * Return Value
2396 * whatever is returned from pmcraid_reset_reload
2397 */
2398static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2399{
2400 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2401
2402 return pmcraid_reset_reload(pinstance,
2403 SHUTDOWN_NONE,
2404 IOA_STATE_OPERATIONAL);
2405}
2406
2407/**
2408 * pmcraid_request_sense - Send request sense to a device
2409 * @cmd: pmcraid command struct
2410 *
2411 * This function sends a request sense to a device as a result of a check
2412 * condition. This method re-uses the same command block that failed earlier.
2413 */
2414static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2415{
2416 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2417 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2418 struct device *dev = &cmd->drv_inst->pdev->dev;
2419
2420 cmd->sense_buffer = cmd->scsi_cmd->sense_buffer;
2421 cmd->sense_buffer_dma = dma_map_single(dev, cmd->sense_buffer,
2422 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
2423 if (dma_mapping_error(dev, cmd->sense_buffer_dma)) {
2424 pmcraid_err
2425 ("couldn't allocate sense buffer for request sense\n");
2426 pmcraid_erp_done(cmd);
2427 return;
2428 }
2429
2430 /* re-use the command block */
2431 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2432 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2433 ioarcb->request_flags0 = (SYNC_COMPLETE |
2434 NO_LINK_DESCS |
2435 INHIBIT_UL_CHECK);
2436 ioarcb->request_type = REQ_TYPE_SCSI;
2437 ioarcb->cdb[0] = REQUEST_SENSE;
2438 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2439
2440 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2441 offsetof(struct pmcraid_ioarcb,
2442 add_data.u.ioadl[0]));
2443 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2444
2445 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2446
2447 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2448 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2449 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2450
2451 /* request sense might be called as part of error response processing
2452 * which runs in tasklets context. It is possible that mid-layer might
2453 * schedule queuecommand during this time, hence, writting to IOARRIN
2454 * must be protect by host_lock
2455 */
2456 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2457 PMCRAID_REQUEST_SENSE_TIMEOUT,
2458 pmcraid_timeout_handler);
2459}
2460
2461/**
2462 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2463 * @cmd: command that failed
2464 * @need_sense: true if request_sense is required after cancel all
2465 *
2466 * This function sends a cancel all to a device to clear the queue.
2467 */
2468static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, bool need_sense)
2469{
2470 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2471 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2472 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2473
2474 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2475 ioarcb->request_flags0 = SYNC_OVERRIDE;
2476 ioarcb->request_type = REQ_TYPE_IOACMD;
2477 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2478
2479 if (RES_IS_GSCSI(res->cfg_entry))
2480 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2481
2482 ioarcb->ioadl_bus_addr = 0;
2483 ioarcb->ioadl_length = 0;
2484 ioarcb->data_transfer_length = 0;
2485 ioarcb->ioarcb_bus_addr &= cpu_to_le64((~0x1FULL));
2486
2487 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2488 * schedule queuecommand while we are doing this
2489 */
2490 pmcraid_send_cmd(cmd, need_sense ?
2491 pmcraid_erp_done : pmcraid_request_sense,
2492 PMCRAID_REQUEST_SENSE_TIMEOUT,
2493 pmcraid_timeout_handler);
2494}
2495
2496/**
2497 * pmcraid_frame_auto_sense: frame fixed format sense information
2498 *
2499 * @cmd: pointer to failing command block
2500 *
2501 * Return value
2502 * none
2503 */
2504static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2505{
2506 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2507 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2508 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2509 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2510 u32 failing_lba = 0;
2511
2512 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2513 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2514
2515 if (RES_IS_VSET(res->cfg_entry) &&
2516 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2517 ioasa->u.vset.failing_lba_hi != 0) {
2518
2519 sense_buf[0] = 0x72;
2520 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2521 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2522 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2523
2524 sense_buf[7] = 12;
2525 sense_buf[8] = 0;
2526 sense_buf[9] = 0x0A;
2527 sense_buf[10] = 0x80;
2528
2529 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2530
2531 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2532 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2533 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2534 sense_buf[15] = failing_lba & 0x000000ff;
2535
2536 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2537
2538 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2539 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2540 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2541 sense_buf[19] = failing_lba & 0x000000ff;
2542 } else {
2543 sense_buf[0] = 0x70;
2544 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2545 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2546 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2547
2548 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2549 if (RES_IS_VSET(res->cfg_entry))
2550 failing_lba =
2551 le32_to_cpu(ioasa->u.
2552 vset.failing_lba_lo);
2553 sense_buf[0] |= 0x80;
2554 sense_buf[3] = (failing_lba >> 24) & 0xff;
2555 sense_buf[4] = (failing_lba >> 16) & 0xff;
2556 sense_buf[5] = (failing_lba >> 8) & 0xff;
2557 sense_buf[6] = failing_lba & 0xff;
2558 }
2559
2560 sense_buf[7] = 6; /* additional length */
2561 }
2562}
2563
2564/**
2565 * pmcraid_error_handler - Error response handlers for a SCSI op
2566 * @cmd: pointer to pmcraid_cmd that has failed
2567 *
2568 * This function determines whether or not to initiate ERP on the affected
2569 * device. This is called from a tasklet, which doesn't hold any locks.
2570 *
2571 * Return value:
2572 * 0 it caller can complete the request, otherwise 1 where in error
2573 * handler itself completes the request and returns the command block
2574 * back to free-pool
2575 */
2576static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2577{
2578 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2579 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2580 struct pmcraid_instance *pinstance = cmd->drv_inst;
2581 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2582 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2583 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2584 bool sense_copied = false;
2585
2586 if (!res) {
2587 pmcraid_info("resource pointer is NULL\n");
2588 return 0;
2589 }
2590
2591 /* If this was a SCSI read/write command keep count of errors */
2592 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2593 atomic_inc(&res->read_failures);
2594 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2595 atomic_inc(&res->write_failures);
2596
2597 if (!RES_IS_GSCSI(res->cfg_entry) &&
2598 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2599 pmcraid_frame_auto_sense(cmd);
2600 }
2601
2602 /* Log IOASC/IOASA information based on user settings */
2603 pmcraid_ioasc_logger(ioasc, cmd);
2604
2605 switch (masked_ioasc) {
2606
2607 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2608 scsi_cmd->result |= (DID_ABORT << 16);
2609 break;
2610
2611 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2612 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2613 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2614 break;
2615
2616 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2617 res->sync_reqd = 1;
2618 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2619 break;
2620
2621 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2622 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2623 break;
2624
2625 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2626 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2627 if (!res->reset_progress)
2628 scsi_report_bus_reset(pinstance->host,
2629 scsi_cmd->device->channel);
2630 scsi_cmd->result |= (DID_ERROR << 16);
2631 break;
2632
2633 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2634 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2635 res->sync_reqd = 1;
2636
2637 /* if check_condition is not active return with error otherwise
2638 * get/frame the sense buffer
2639 */
2640 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2641 SAM_STAT_CHECK_CONDITION &&
2642 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2643 return 0;
2644
2645 /* If we have auto sense data as part of IOASA pass it to
2646 * mid-layer
2647 */
2648 if (ioasa->auto_sense_length != 0) {
2649 short sense_len = le16_to_cpu(ioasa->auto_sense_length);
2650 int data_size = min_t(u16, sense_len,
2651 SCSI_SENSE_BUFFERSIZE);
2652
2653 memcpy(scsi_cmd->sense_buffer,
2654 ioasa->sense_data,
2655 data_size);
2656 sense_copied = true;
2657 }
2658
2659 if (RES_IS_GSCSI(res->cfg_entry))
2660 pmcraid_cancel_all(cmd, sense_copied);
2661 else if (sense_copied)
2662 pmcraid_erp_done(cmd);
2663 else
2664 pmcraid_request_sense(cmd);
2665
2666 return 1;
2667
2668 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2669 break;
2670
2671 default:
2672 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2673 scsi_cmd->result |= (DID_ERROR << 16);
2674 break;
2675 }
2676 return 0;
2677}
2678
2679/**
2680 * pmcraid_reset_device - device reset handler functions
2681 *
2682 * @scsi_cmd: scsi command struct
2683 * @timeout: command timeout
2684 * @modifier: reset modifier indicating the reset sequence to be performed
2685 *
2686 * This function issues a device reset to the affected device.
2687 * A LUN reset will be sent to the device first. If that does
2688 * not work, a target reset will be sent.
2689 *
2690 * Return value:
2691 * SUCCESS / FAILED
2692 */
2693static int pmcraid_reset_device(
2694 struct scsi_cmnd *scsi_cmd,
2695 unsigned long timeout,
2696 u8 modifier)
2697{
2698 struct pmcraid_cmd *cmd;
2699 struct pmcraid_instance *pinstance;
2700 struct pmcraid_resource_entry *res;
2701 struct pmcraid_ioarcb *ioarcb;
2702 unsigned long lock_flags;
2703 u32 ioasc;
2704
2705 pinstance =
2706 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2707 res = scsi_cmd->device->hostdata;
2708
2709 if (!res) {
2710 sdev_printk(KERN_ERR, scsi_cmd->device,
2711 "reset_device: NULL resource pointer\n");
2712 return FAILED;
2713 }
2714
2715 /* If adapter is currently going through reset/reload, return failed.
2716 * This will force the mid-layer to call _eh_bus/host reset, which
2717 * will then go to sleep and wait for the reset to complete
2718 */
2719 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2720 if (pinstance->ioa_reset_in_progress ||
2721 pinstance->ioa_state == IOA_STATE_DEAD) {
2722 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2723 return FAILED;
2724 }
2725
2726 res->reset_progress = 1;
2727 pmcraid_info("Resetting %s resource with addr %x\n",
2728 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2729 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2730 le32_to_cpu(res->cfg_entry.resource_address));
2731
2732 /* get a free cmd block */
2733 cmd = pmcraid_get_free_cmd(pinstance);
2734
2735 if (cmd == NULL) {
2736 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2737 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2738 return FAILED;
2739 }
2740
2741 ioarcb = &cmd->ioa_cb->ioarcb;
2742 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2743 ioarcb->request_type = REQ_TYPE_IOACMD;
2744 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2745
2746 /* Initialize reset modifier bits */
2747 if (modifier)
2748 modifier = ENABLE_RESET_MODIFIER | modifier;
2749
2750 ioarcb->cdb[1] = modifier;
2751
2752 init_completion(&cmd->wait_for_completion);
2753 cmd->completion_req = 1;
2754
2755 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2756 cmd->ioa_cb->ioarcb.cdb[0],
2757 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2758 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2759
2760 pmcraid_send_cmd(cmd,
2761 pmcraid_internal_done,
2762 timeout,
2763 pmcraid_timeout_handler);
2764
2765 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2766
2767 /* RESET_DEVICE command completes after all pending IOARCBs are
2768 * completed. Once this command is completed, pmcraind_internal_done
2769 * will wake up the 'completion' queue.
2770 */
2771 wait_for_completion(&cmd->wait_for_completion);
2772
2773 /* complete the command here itself and return the command block
2774 * to free list
2775 */
2776 pmcraid_return_cmd(cmd);
2777 res->reset_progress = 0;
2778 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2779
2780 /* set the return value based on the returned ioasc */
2781 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2782}
2783
2784/**
2785 * _pmcraid_io_done - helper for pmcraid_io_done function
2786 *
2787 * @cmd: pointer to pmcraid command struct
2788 * @reslen: residual data length to be set in the ioasa
2789 * @ioasc: ioasc either returned by IOA or set by driver itself.
2790 *
2791 * This function is invoked by pmcraid_io_done to complete mid-layer
2792 * scsi ops.
2793 *
2794 * Return value:
2795 * 0 if caller is required to return it to free_pool. Returns 1 if
2796 * caller need not worry about freeing command block as error handler
2797 * will take care of that.
2798 */
2799
2800static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2801{
2802 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2803 int rc = 0;
2804
2805 scsi_set_resid(scsi_cmd, reslen);
2806
2807 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2808 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2809 cmd->ioa_cb->ioarcb.cdb[0],
2810 ioasc, scsi_cmd->result);
2811
2812 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2813 rc = pmcraid_error_handler(cmd);
2814
2815 if (rc == 0) {
2816 scsi_dma_unmap(scsi_cmd);
2817 scsi_cmd->scsi_done(scsi_cmd);
2818 }
2819
2820 return rc;
2821}
2822
2823/**
2824 * pmcraid_io_done - SCSI completion function
2825 *
2826 * @cmd: pointer to pmcraid command struct
2827 *
2828 * This function is invoked by tasklet/mid-layer error handler to completing
2829 * the SCSI ops sent from mid-layer.
2830 *
2831 * Return value
2832 * none
2833 */
2834
2835static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2836{
2837 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2838 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2839
2840 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2841 pmcraid_return_cmd(cmd);
2842}
2843
2844/**
2845 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2846 *
2847 * @cmd: command block of the command to be aborted
2848 *
2849 * Return Value:
2850 * returns pointer to command structure used as cancelling cmd
2851 */
2852static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2853{
2854 struct pmcraid_cmd *cancel_cmd;
2855 struct pmcraid_instance *pinstance;
2856
2857 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2858
2859 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2860
2861 if (cancel_cmd == NULL) {
2862 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2863 return NULL;
2864 }
2865
2866 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2867
2868 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2869 cmd->ioa_cb->ioarcb.cdb[0],
2870 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2871
2872 init_completion(&cancel_cmd->wait_for_completion);
2873 cancel_cmd->completion_req = 1;
2874
2875 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2876 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2877 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2878 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2879
2880 pmcraid_send_cmd(cancel_cmd,
2881 pmcraid_internal_done,
2882 PMCRAID_INTERNAL_TIMEOUT,
2883 pmcraid_timeout_handler);
2884 return cancel_cmd;
2885}
2886
2887/**
2888 * pmcraid_abort_complete - Waits for ABORT TASK completion
2889 *
2890 * @cancel_cmd: command block use as cancelling command
2891 *
2892 * Return Value:
2893 * returns SUCCESS if ABORT TASK has good completion
2894 * otherwise FAILED
2895 */
2896static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2897{
2898 struct pmcraid_resource_entry *res;
2899 u32 ioasc;
2900
2901 wait_for_completion(&cancel_cmd->wait_for_completion);
2902 res = cancel_cmd->res;
2903 cancel_cmd->res = NULL;
2904 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2905
2906 /* If the abort task is not timed out we will get a Good completion
2907 * as sense_key, otherwise we may get one the following responses
2908 * due to subsequent bus reset or device reset. In case IOASC is
2909 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2910 */
2911 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
2912 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
2913 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
2914 res->sync_reqd = 1;
2915 ioasc = 0;
2916 }
2917
2918 /* complete the command here itself */
2919 pmcraid_return_cmd(cancel_cmd);
2920 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2921}
2922
2923/**
2924 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
2925 *
2926 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
2927 * mid-layer ensures that no other commands are queued. This
2928 * never gets called under interrupt, but a separate eh thread.
2929 *
2930 * Return value:
2931 * SUCCESS / FAILED
2932 */
2933static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
2934{
2935 struct pmcraid_instance *pinstance;
2936 struct pmcraid_cmd *cmd;
2937 struct pmcraid_resource_entry *res;
2938 unsigned long host_lock_flags;
2939 unsigned long pending_lock_flags;
2940 struct pmcraid_cmd *cancel_cmd = NULL;
2941 int cmd_found = 0;
2942 int rc = FAILED;
2943
2944 pinstance =
2945 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2946
2947 scmd_printk(KERN_INFO, scsi_cmd,
2948 "I/O command timed out, aborting it.\n");
2949
2950 res = scsi_cmd->device->hostdata;
2951
2952 if (res == NULL)
2953 return rc;
2954
2955 /* If we are currently going through reset/reload, return failed.
2956 * This will force the mid-layer to eventually call
2957 * pmcraid_eh_host_reset which will then go to sleep and wait for the
2958 * reset to complete
2959 */
2960 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
2961
2962 if (pinstance->ioa_reset_in_progress ||
2963 pinstance->ioa_state == IOA_STATE_DEAD) {
2964 spin_unlock_irqrestore(pinstance->host->host_lock,
2965 host_lock_flags);
2966 return rc;
2967 }
2968
2969 /* loop over pending cmd list to find cmd corresponding to this
2970 * scsi_cmd. Note that this command might not have been completed
2971 * already. locking: all pending commands are protected with
2972 * pending_pool_lock.
2973 */
2974 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
2975 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
2976
2977 if (cmd->scsi_cmd == scsi_cmd) {
2978 cmd_found = 1;
2979 break;
2980 }
2981 }
2982
2983 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2984 pending_lock_flags);
2985
2986 /* If the command to be aborted was given to IOA and still pending with
2987 * it, send ABORT_TASK to abort this and wait for its completion
2988 */
2989 if (cmd_found)
2990 cancel_cmd = pmcraid_abort_cmd(cmd);
2991
2992 spin_unlock_irqrestore(pinstance->host->host_lock,
2993 host_lock_flags);
2994
2995 if (cancel_cmd) {
2996 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
2997 rc = pmcraid_abort_complete(cancel_cmd);
2998 }
2999
3000 return cmd_found ? rc : SUCCESS;
3001}
3002
3003/**
3004 * pmcraid_eh_device_reset_handler - bus/target/device reset handler callbacks
3005 *
3006 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3007 *
3008 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3009 * Since these are called from mid-layer EH thread, no other IO will be queued
3010 * to the resource being reset. However, control path (IOCTL) may be active so
3011 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3012 * takes care by locking/unlocking host_lock.
3013 *
3014 * Return value
3015 * SUCCESS or FAILED
3016 */
3017static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3018{
3019 scmd_printk(KERN_INFO, scmd,
3020 "resetting device due to an I/O command timeout.\n");
3021 return pmcraid_reset_device(scmd,
3022 PMCRAID_INTERNAL_TIMEOUT,
3023 RESET_DEVICE_LUN);
3024}
3025
3026static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3027{
3028 scmd_printk(KERN_INFO, scmd,
3029 "Doing bus reset due to an I/O command timeout.\n");
3030 return pmcraid_reset_device(scmd,
3031 PMCRAID_RESET_BUS_TIMEOUT,
3032 RESET_DEVICE_BUS);
3033}
3034
3035static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3036{
3037 scmd_printk(KERN_INFO, scmd,
3038 "Doing target reset due to an I/O command timeout.\n");
3039 return pmcraid_reset_device(scmd,
3040 PMCRAID_INTERNAL_TIMEOUT,
3041 RESET_DEVICE_TARGET);
3042}
3043
3044/**
3045 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3046 *
3047 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3048 *
3049 * Initiates adapter reset to bring it up to operational state
3050 *
3051 * Return value
3052 * SUCCESS or FAILED
3053 */
3054static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3055{
3056 unsigned long interval = 10000; /* 10 seconds interval */
3057 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3058 struct pmcraid_instance *pinstance =
3059 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3060
3061
3062 /* wait for an additional 150 seconds just in case firmware could come
3063 * up and if it could complete all the pending commands excluding the
3064 * two HCAM (CCN and LDN).
3065 */
3066 while (waits--) {
3067 if (atomic_read(&pinstance->outstanding_cmds) <=
3068 PMCRAID_MAX_HCAM_CMD)
3069 return SUCCESS;
3070 msleep(interval);
3071 }
3072
3073 dev_err(&pinstance->pdev->dev,
3074 "Adapter being reset due to an I/O command timeout.\n");
3075 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3076}
3077
3078/**
3079 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3080 * @cmd: pmcraid command struct
3081 * @sgcount: count of scatter-gather elements
3082 *
3083 * Return value
3084 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3085 * or external IOADLs
3086 */
3087static struct pmcraid_ioadl_desc *
3088pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3089{
3090 struct pmcraid_ioadl_desc *ioadl;
3091 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3092 int ioadl_count = 0;
3093
3094 if (ioarcb->add_cmd_param_length)
3095 ioadl_count = DIV_ROUND_UP(le16_to_cpu(ioarcb->add_cmd_param_length), 16);
3096 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc) * sgcount);
3097
3098 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3099 /* external ioadls start at offset 0x80 from control_block
3100 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3101 * It is necessary to indicate to firmware that driver is
3102 * using ioadls to be treated as external to IOARCB.
3103 */
3104 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
3105 ioarcb->ioadl_bus_addr =
3106 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3107 offsetof(struct pmcraid_ioarcb,
3108 add_data.u.ioadl[3]));
3109 ioadl = &ioarcb->add_data.u.ioadl[3];
3110 } else {
3111 ioarcb->ioadl_bus_addr =
3112 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3113 offsetof(struct pmcraid_ioarcb,
3114 add_data.u.ioadl[ioadl_count]));
3115
3116 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3117 ioarcb->ioarcb_bus_addr |=
3118 cpu_to_le64(DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8));
3119 }
3120
3121 return ioadl;
3122}
3123
3124/**
3125 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3126 * @pinstance: pointer to adapter instance structure
3127 * @cmd: pmcraid command struct
3128 *
3129 * This function is invoked by queuecommand entry point while sending a command
3130 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3131 *
3132 * Return value:
3133 * 0 on success or -1 on failure
3134 */
3135static int pmcraid_build_ioadl(
3136 struct pmcraid_instance *pinstance,
3137 struct pmcraid_cmd *cmd
3138)
3139{
3140 int i, nseg;
3141 struct scatterlist *sglist;
3142
3143 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3144 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3145 struct pmcraid_ioadl_desc *ioadl;
3146
3147 u32 length = scsi_bufflen(scsi_cmd);
3148
3149 if (!length)
3150 return 0;
3151
3152 nseg = scsi_dma_map(scsi_cmd);
3153
3154 if (nseg < 0) {
3155 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3156 return -1;
3157 } else if (nseg > PMCRAID_MAX_IOADLS) {
3158 scsi_dma_unmap(scsi_cmd);
3159 scmd_printk(KERN_ERR, scsi_cmd,
3160 "sg count is (%d) more than allowed!\n", nseg);
3161 return -1;
3162 }
3163
3164 /* Initialize IOARCB data transfer length fields */
3165 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3166 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3167
3168 ioarcb->request_flags0 |= NO_LINK_DESCS;
3169 ioarcb->data_transfer_length = cpu_to_le32(length);
3170 ioadl = pmcraid_init_ioadls(cmd, nseg);
3171
3172 /* Initialize IOADL descriptor addresses */
3173 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3174 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3175 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3176 ioadl[i].flags = 0;
3177 }
3178 /* setup last descriptor */
3179 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3180
3181 return 0;
3182}
3183
3184/**
3185 * pmcraid_free_sglist - Frees an allocated SG buffer list
3186 * @sglist: scatter/gather list pointer
3187 *
3188 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3189 *
3190 * Return value:
3191 * none
3192 */
3193static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3194{
3195 sgl_free_order(sglist->scatterlist, sglist->order);
3196 kfree(sglist);
3197}
3198
3199/**
3200 * pmcraid_alloc_sglist - Allocates memory for a SG list
3201 * @buflen: buffer length
3202 *
3203 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3204 * list.
3205 *
3206 * Return value
3207 * pointer to sglist / NULL on failure
3208 */
3209static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3210{
3211 struct pmcraid_sglist *sglist;
3212 int sg_size;
3213 int order;
3214
3215 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3216 order = (sg_size > 0) ? get_order(sg_size) : 0;
3217
3218 /* Allocate a scatter/gather list for the DMA */
3219 sglist = kzalloc(sizeof(struct pmcraid_sglist), GFP_KERNEL);
3220 if (sglist == NULL)
3221 return NULL;
3222
3223 sglist->order = order;
3224 sgl_alloc_order(buflen, order, false,
3225 GFP_KERNEL | GFP_DMA | __GFP_ZERO, &sglist->num_sg);
3226
3227 return sglist;
3228}
3229
3230/**
3231 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3232 * @sglist: scatter/gather list pointer
3233 * @buffer: buffer pointer
3234 * @len: buffer length
3235 * @direction: data transfer direction
3236 *
3237 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3238 *
3239 * Return value:
3240 * 0 on success / other on failure
3241 */
3242static int pmcraid_copy_sglist(
3243 struct pmcraid_sglist *sglist,
3244 void __user *buffer,
3245 u32 len,
3246 int direction
3247)
3248{
3249 struct scatterlist *sg;
3250 void *kaddr;
3251 int bsize_elem;
3252 int i;
3253 int rc = 0;
3254
3255 /* Determine the actual number of bytes per element */
3256 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3257
3258 sg = sglist->scatterlist;
3259
3260 for (i = 0; i < (len / bsize_elem); i++, sg = sg_next(sg), buffer += bsize_elem) {
3261 struct page *page = sg_page(sg);
3262
3263 kaddr = kmap(page);
3264 if (direction == DMA_TO_DEVICE)
3265 rc = copy_from_user(kaddr, buffer, bsize_elem);
3266 else
3267 rc = copy_to_user(buffer, kaddr, bsize_elem);
3268
3269 kunmap(page);
3270
3271 if (rc) {
3272 pmcraid_err("failed to copy user data into sg list\n");
3273 return -EFAULT;
3274 }
3275
3276 sg->length = bsize_elem;
3277 }
3278
3279 if (len % bsize_elem) {
3280 struct page *page = sg_page(sg);
3281
3282 kaddr = kmap(page);
3283
3284 if (direction == DMA_TO_DEVICE)
3285 rc = copy_from_user(kaddr, buffer, len % bsize_elem);
3286 else
3287 rc = copy_to_user(buffer, kaddr, len % bsize_elem);
3288
3289 kunmap(page);
3290
3291 sg->length = len % bsize_elem;
3292 }
3293
3294 if (rc) {
3295 pmcraid_err("failed to copy user data into sg list\n");
3296 rc = -EFAULT;
3297 }
3298
3299 return rc;
3300}
3301
3302/**
3303 * pmcraid_queuecommand_lck - Queue a mid-layer request
3304 * @scsi_cmd: scsi command struct
3305 * @done: done function
3306 *
3307 * This function queues a request generated by the mid-layer. Midlayer calls
3308 * this routine within host->lock. Some of the functions called by queuecommand
3309 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3310 *
3311 * Return value:
3312 * 0 on success
3313 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3314 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3315 */
3316static int pmcraid_queuecommand_lck(
3317 struct scsi_cmnd *scsi_cmd,
3318 void (*done) (struct scsi_cmnd *)
3319)
3320{
3321 struct pmcraid_instance *pinstance;
3322 struct pmcraid_resource_entry *res;
3323 struct pmcraid_ioarcb *ioarcb;
3324 struct pmcraid_cmd *cmd;
3325 u32 fw_version;
3326 int rc = 0;
3327
3328 pinstance =
3329 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3330 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3331 scsi_cmd->scsi_done = done;
3332 res = scsi_cmd->device->hostdata;
3333 scsi_cmd->result = (DID_OK << 16);
3334
3335 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3336 * the command
3337 */
3338 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3339 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3340 scsi_cmd->result = (DID_NO_CONNECT << 16);
3341 scsi_cmd->scsi_done(scsi_cmd);
3342 return 0;
3343 }
3344
3345 /* If IOA reset is in progress, can't queue the commands */
3346 if (pinstance->ioa_reset_in_progress)
3347 return SCSI_MLQUEUE_HOST_BUSY;
3348
3349 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3350 * the command here itself with success return
3351 */
3352 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3353 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3354 scsi_cmd->scsi_done(scsi_cmd);
3355 return 0;
3356 }
3357
3358 /* initialize the command and IOARCB to be sent to IOA */
3359 cmd = pmcraid_get_free_cmd(pinstance);
3360
3361 if (cmd == NULL) {
3362 pmcraid_err("free command block is not available\n");
3363 return SCSI_MLQUEUE_HOST_BUSY;
3364 }
3365
3366 cmd->scsi_cmd = scsi_cmd;
3367 ioarcb = &(cmd->ioa_cb->ioarcb);
3368 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3369 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3370 ioarcb->request_type = REQ_TYPE_SCSI;
3371
3372 /* set hrrq number where the IOA should respond to. Note that all cmds
3373 * generated internally uses hrrq_id 0, exception to this is the cmd
3374 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3375 * hrrq_id assigned here in queuecommand
3376 */
3377 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3378 pinstance->num_hrrq;
3379 cmd->cmd_done = pmcraid_io_done;
3380
3381 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3382 if (scsi_cmd->underflow == 0)
3383 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3384
3385 if (res->sync_reqd) {
3386 ioarcb->request_flags0 |= SYNC_COMPLETE;
3387 res->sync_reqd = 0;
3388 }
3389
3390 ioarcb->request_flags0 |= NO_LINK_DESCS;
3391
3392 if (scsi_cmd->flags & SCMD_TAGGED)
3393 ioarcb->request_flags1 |= TASK_TAG_SIMPLE;
3394
3395 if (RES_IS_GSCSI(res->cfg_entry))
3396 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3397 }
3398
3399 rc = pmcraid_build_ioadl(pinstance, cmd);
3400
3401 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3402 le32_to_cpu(ioarcb->response_handle) >> 2,
3403 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3404 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3405 PMCRAID_PHYS_BUS_ID,
3406 RES_IS_VSET(res->cfg_entry) ?
3407 (fw_version <= PMCRAID_FW_VERSION_1 ?
3408 res->cfg_entry.unique_flags1 :
3409 le16_to_cpu(res->cfg_entry.array_id) & 0xFF) :
3410 RES_TARGET(res->cfg_entry.resource_address),
3411 RES_LUN(res->cfg_entry.resource_address));
3412
3413 if (likely(rc == 0)) {
3414 _pmcraid_fire_command(cmd);
3415 } else {
3416 pmcraid_err("queuecommand could not build ioadl\n");
3417 pmcraid_return_cmd(cmd);
3418 rc = SCSI_MLQUEUE_HOST_BUSY;
3419 }
3420
3421 return rc;
3422}
3423
3424static DEF_SCSI_QCMD(pmcraid_queuecommand)
3425
3426/*
3427 * pmcraid_open -char node "open" entry, allowed only users with admin access
3428 */
3429static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3430{
3431 struct pmcraid_instance *pinstance;
3432
3433 if (!capable(CAP_SYS_ADMIN))
3434 return -EACCES;
3435
3436 /* Populate adapter instance * pointer for use by ioctl */
3437 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3438 filep->private_data = pinstance;
3439
3440 return 0;
3441}
3442
3443/*
3444 * pmcraid_fasync - Async notifier registration from applications
3445 *
3446 * This function adds the calling process to a driver global queue. When an
3447 * event occurs, SIGIO will be sent to all processes in this queue.
3448 */
3449static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3450{
3451 struct pmcraid_instance *pinstance;
3452 int rc;
3453
3454 pinstance = filep->private_data;
3455 mutex_lock(&pinstance->aen_queue_lock);
3456 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3457 mutex_unlock(&pinstance->aen_queue_lock);
3458
3459 return rc;
3460}
3461
3462
3463/**
3464 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3465 * commands sent over IOCTL interface
3466 *
3467 * @cmd : pointer to struct pmcraid_cmd
3468 * @buflen : length of the request buffer
3469 * @direction : data transfer direction
3470 *
3471 * Return value
3472 * 0 on success, non-zero error code on failure
3473 */
3474static int pmcraid_build_passthrough_ioadls(
3475 struct pmcraid_cmd *cmd,
3476 int buflen,
3477 int direction
3478)
3479{
3480 struct pmcraid_sglist *sglist = NULL;
3481 struct scatterlist *sg = NULL;
3482 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3483 struct pmcraid_ioadl_desc *ioadl;
3484 int i;
3485
3486 sglist = pmcraid_alloc_sglist(buflen);
3487
3488 if (!sglist) {
3489 pmcraid_err("can't allocate memory for passthrough SGls\n");
3490 return -ENOMEM;
3491 }
3492
3493 sglist->num_dma_sg = dma_map_sg(&cmd->drv_inst->pdev->dev,
3494 sglist->scatterlist,
3495 sglist->num_sg, direction);
3496
3497 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3498 dev_err(&cmd->drv_inst->pdev->dev,
3499 "Failed to map passthrough buffer!\n");
3500 pmcraid_free_sglist(sglist);
3501 return -EIO;
3502 }
3503
3504 cmd->sglist = sglist;
3505 ioarcb->request_flags0 |= NO_LINK_DESCS;
3506
3507 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3508
3509 /* Initialize IOADL descriptor addresses */
3510 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3511 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3512 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3513 ioadl[i].flags = 0;
3514 }
3515
3516 /* setup the last descriptor */
3517 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3518
3519 return 0;
3520}
3521
3522
3523/**
3524 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3525 *
3526 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3527 * @buflen: size of the request buffer
3528 * @direction: data transfer direction
3529 *
3530 * Return value
3531 * 0 on success, non-zero error code on failure
3532 */
3533static void pmcraid_release_passthrough_ioadls(
3534 struct pmcraid_cmd *cmd,
3535 int buflen,
3536 int direction
3537)
3538{
3539 struct pmcraid_sglist *sglist = cmd->sglist;
3540
3541 if (buflen > 0) {
3542 dma_unmap_sg(&cmd->drv_inst->pdev->dev,
3543 sglist->scatterlist,
3544 sglist->num_sg,
3545 direction);
3546 pmcraid_free_sglist(sglist);
3547 cmd->sglist = NULL;
3548 }
3549}
3550
3551/**
3552 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3553 *
3554 * @pinstance: pointer to adapter instance structure
3555 * @ioctl_cmd: ioctl code
3556 * @buflen: unused
3557 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3558 *
3559 * Return value
3560 * 0 on success, non-zero error code on failure
3561 */
3562static long pmcraid_ioctl_passthrough(
3563 struct pmcraid_instance *pinstance,
3564 unsigned int ioctl_cmd,
3565 unsigned int buflen,
3566 void __user *arg
3567)
3568{
3569 struct pmcraid_passthrough_ioctl_buffer *buffer;
3570 struct pmcraid_ioarcb *ioarcb;
3571 struct pmcraid_cmd *cmd;
3572 struct pmcraid_cmd *cancel_cmd;
3573 void __user *request_buffer;
3574 unsigned long request_offset;
3575 unsigned long lock_flags;
3576 void __user *ioasa;
3577 u32 ioasc;
3578 int request_size;
3579 int buffer_size;
3580 u8 direction;
3581 int rc = 0;
3582
3583 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3584 if (pinstance->ioa_reset_in_progress) {
3585 rc = wait_event_interruptible_timeout(
3586 pinstance->reset_wait_q,
3587 !pinstance->ioa_reset_in_progress,
3588 msecs_to_jiffies(10000));
3589
3590 if (!rc)
3591 return -ETIMEDOUT;
3592 else if (rc < 0)
3593 return -ERESTARTSYS;
3594 }
3595
3596 /* If adapter is not in operational state, return error */
3597 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3598 pmcraid_err("IOA is not operational\n");
3599 return -ENOTTY;
3600 }
3601
3602 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3603 buffer = kmalloc(buffer_size, GFP_KERNEL);
3604
3605 if (!buffer) {
3606 pmcraid_err("no memory for passthrough buffer\n");
3607 return -ENOMEM;
3608 }
3609
3610 request_offset =
3611 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3612
3613 request_buffer = arg + request_offset;
3614
3615 rc = copy_from_user(buffer, arg,
3616 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3617
3618 ioasa = arg + offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa);
3619
3620 if (rc) {
3621 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3622 rc = -EFAULT;
3623 goto out_free_buffer;
3624 }
3625
3626 request_size = le32_to_cpu(buffer->ioarcb.data_transfer_length);
3627
3628 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3629 direction = DMA_TO_DEVICE;
3630 } else {
3631 direction = DMA_FROM_DEVICE;
3632 }
3633
3634 if (request_size < 0) {
3635 rc = -EINVAL;
3636 goto out_free_buffer;
3637 }
3638
3639 /* check if we have any additional command parameters */
3640 if (le16_to_cpu(buffer->ioarcb.add_cmd_param_length)
3641 > PMCRAID_ADD_CMD_PARAM_LEN) {
3642 rc = -EINVAL;
3643 goto out_free_buffer;
3644 }
3645
3646 cmd = pmcraid_get_free_cmd(pinstance);
3647
3648 if (!cmd) {
3649 pmcraid_err("free command block is not available\n");
3650 rc = -ENOMEM;
3651 goto out_free_buffer;
3652 }
3653
3654 cmd->scsi_cmd = NULL;
3655 ioarcb = &(cmd->ioa_cb->ioarcb);
3656
3657 /* Copy the user-provided IOARCB stuff field by field */
3658 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3659 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3660 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3661 ioarcb->request_type = buffer->ioarcb.request_type;
3662 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3663 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3664 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3665
3666 if (buffer->ioarcb.add_cmd_param_length) {
3667 ioarcb->add_cmd_param_length =
3668 buffer->ioarcb.add_cmd_param_length;
3669 ioarcb->add_cmd_param_offset =
3670 buffer->ioarcb.add_cmd_param_offset;
3671 memcpy(ioarcb->add_data.u.add_cmd_params,
3672 buffer->ioarcb.add_data.u.add_cmd_params,
3673 le16_to_cpu(buffer->ioarcb.add_cmd_param_length));
3674 }
3675
3676 /* set hrrq number where the IOA should respond to. Note that all cmds
3677 * generated internally uses hrrq_id 0, exception to this is the cmd
3678 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3679 * hrrq_id assigned here in queuecommand
3680 */
3681 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3682 pinstance->num_hrrq;
3683
3684 if (request_size) {
3685 rc = pmcraid_build_passthrough_ioadls(cmd,
3686 request_size,
3687 direction);
3688 if (rc) {
3689 pmcraid_err("couldn't build passthrough ioadls\n");
3690 goto out_free_cmd;
3691 }
3692 }
3693
3694 /* If data is being written into the device, copy the data from user
3695 * buffers
3696 */
3697 if (direction == DMA_TO_DEVICE && request_size > 0) {
3698 rc = pmcraid_copy_sglist(cmd->sglist,
3699 request_buffer,
3700 request_size,
3701 direction);
3702 if (rc) {
3703 pmcraid_err("failed to copy user buffer\n");
3704 goto out_free_sglist;
3705 }
3706 }
3707
3708 /* passthrough ioctl is a blocking command so, put the user to sleep
3709 * until timeout. Note that a timeout value of 0 means, do timeout.
3710 */
3711 cmd->cmd_done = pmcraid_internal_done;
3712 init_completion(&cmd->wait_for_completion);
3713 cmd->completion_req = 1;
3714
3715 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3716 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3717 cmd->ioa_cb->ioarcb.cdb[0],
3718 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3719
3720 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3721 _pmcraid_fire_command(cmd);
3722 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3723
3724 /* NOTE ! Remove the below line once abort_task is implemented
3725 * in firmware. This line disables ioctl command timeout handling logic
3726 * similar to IO command timeout handling, making ioctl commands to wait
3727 * until the command completion regardless of timeout value specified in
3728 * ioarcb
3729 */
3730 buffer->ioarcb.cmd_timeout = 0;
3731
3732 /* If command timeout is specified put caller to wait till that time,
3733 * otherwise it would be blocking wait. If command gets timed out, it
3734 * will be aborted.
3735 */
3736 if (buffer->ioarcb.cmd_timeout == 0) {
3737 wait_for_completion(&cmd->wait_for_completion);
3738 } else if (!wait_for_completion_timeout(
3739 &cmd->wait_for_completion,
3740 msecs_to_jiffies(le16_to_cpu(buffer->ioarcb.cmd_timeout) * 1000))) {
3741
3742 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3743 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3744 cmd->ioa_cb->ioarcb.cdb[0]);
3745
3746 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3747 cancel_cmd = pmcraid_abort_cmd(cmd);
3748 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3749
3750 if (cancel_cmd) {
3751 wait_for_completion(&cancel_cmd->wait_for_completion);
3752 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
3753 pmcraid_return_cmd(cancel_cmd);
3754
3755 /* if abort task couldn't find the command i.e it got
3756 * completed prior to aborting, return good completion.
3757 * if command got aborted successfully or there was IOA
3758 * reset due to abort task itself getting timedout then
3759 * return -ETIMEDOUT
3760 */
3761 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3762 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3763 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3764 rc = -ETIMEDOUT;
3765 goto out_handle_response;
3766 }
3767 }
3768
3769 /* no command block for abort task or abort task failed to abort
3770 * the IOARCB, then wait for 150 more seconds and initiate reset
3771 * sequence after timeout
3772 */
3773 if (!wait_for_completion_timeout(
3774 &cmd->wait_for_completion,
3775 msecs_to_jiffies(150 * 1000))) {
3776 pmcraid_reset_bringup(cmd->drv_inst);
3777 rc = -ETIMEDOUT;
3778 }
3779 }
3780
3781out_handle_response:
3782 /* copy entire IOASA buffer and return IOCTL success.
3783 * If copying IOASA to user-buffer fails, return
3784 * EFAULT
3785 */
3786 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3787 sizeof(struct pmcraid_ioasa))) {
3788 pmcraid_err("failed to copy ioasa buffer to user\n");
3789 rc = -EFAULT;
3790 }
3791
3792 /* If the data transfer was from device, copy the data onto user
3793 * buffers
3794 */
3795 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3796 rc = pmcraid_copy_sglist(cmd->sglist,
3797 request_buffer,
3798 request_size,
3799 direction);
3800 if (rc) {
3801 pmcraid_err("failed to copy user buffer\n");
3802 rc = -EFAULT;
3803 }
3804 }
3805
3806out_free_sglist:
3807 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3808
3809out_free_cmd:
3810 pmcraid_return_cmd(cmd);
3811
3812out_free_buffer:
3813 kfree(buffer);
3814
3815 return rc;
3816}
3817
3818
3819
3820
3821/**
3822 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3823 *
3824 * @pinstance: pointer to adapter instance structure
3825 * @cmd: ioctl command passed in
3826 * @buflen: length of user_buffer
3827 * @user_buffer: user buffer pointer
3828 *
3829 * Return Value
3830 * 0 in case of success, otherwise appropriate error code
3831 */
3832static long pmcraid_ioctl_driver(
3833 struct pmcraid_instance *pinstance,
3834 unsigned int cmd,
3835 unsigned int buflen,
3836 void __user *user_buffer
3837)
3838{
3839 int rc = -ENOSYS;
3840
3841 switch (cmd) {
3842 case PMCRAID_IOCTL_RESET_ADAPTER:
3843 pmcraid_reset_bringup(pinstance);
3844 rc = 0;
3845 break;
3846
3847 default:
3848 break;
3849 }
3850
3851 return rc;
3852}
3853
3854/**
3855 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
3856 *
3857 * @cmd: ioctl command
3858 * @arg: user buffer
3859 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
3860 *
3861 * Return Value
3862 * negetive error code if there are access issues, otherwise zero.
3863 * Upon success, returns ioctl header copied out of user buffer.
3864 */
3865
3866static int pmcraid_check_ioctl_buffer(
3867 int cmd,
3868 void __user *arg,
3869 struct pmcraid_ioctl_header *hdr
3870)
3871{
3872 int rc;
3873
3874 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
3875 pmcraid_err("couldn't copy ioctl header from user buffer\n");
3876 return -EFAULT;
3877 }
3878
3879 /* check for valid driver signature */
3880 rc = memcmp(hdr->signature,
3881 PMCRAID_IOCTL_SIGNATURE,
3882 sizeof(hdr->signature));
3883 if (rc) {
3884 pmcraid_err("signature verification failed\n");
3885 return -EINVAL;
3886 }
3887
3888 return 0;
3889}
3890
3891/*
3892 * pmcraid_ioctl - char node ioctl entry point
3893 */
3894static long pmcraid_chr_ioctl(
3895 struct file *filep,
3896 unsigned int cmd,
3897 unsigned long arg
3898)
3899{
3900 struct pmcraid_instance *pinstance = NULL;
3901 struct pmcraid_ioctl_header *hdr = NULL;
3902 void __user *argp = (void __user *)arg;
3903 int retval = -ENOTTY;
3904
3905 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
3906
3907 if (!hdr) {
3908 pmcraid_err("failed to allocate memory for ioctl header\n");
3909 return -ENOMEM;
3910 }
3911
3912 retval = pmcraid_check_ioctl_buffer(cmd, argp, hdr);
3913
3914 if (retval) {
3915 pmcraid_info("chr_ioctl: header check failed\n");
3916 kfree(hdr);
3917 return retval;
3918 }
3919
3920 pinstance = filep->private_data;
3921
3922 if (!pinstance) {
3923 pmcraid_info("adapter instance is not found\n");
3924 kfree(hdr);
3925 return -ENOTTY;
3926 }
3927
3928 switch (_IOC_TYPE(cmd)) {
3929
3930 case PMCRAID_PASSTHROUGH_IOCTL:
3931 /* If ioctl code is to download microcode, we need to block
3932 * mid-layer requests.
3933 */
3934 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
3935 scsi_block_requests(pinstance->host);
3936
3937 retval = pmcraid_ioctl_passthrough(pinstance, cmd,
3938 hdr->buffer_length, argp);
3939
3940 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
3941 scsi_unblock_requests(pinstance->host);
3942 break;
3943
3944 case PMCRAID_DRIVER_IOCTL:
3945 arg += sizeof(struct pmcraid_ioctl_header);
3946 retval = pmcraid_ioctl_driver(pinstance, cmd,
3947 hdr->buffer_length, argp);
3948 break;
3949
3950 default:
3951 retval = -ENOTTY;
3952 break;
3953 }
3954
3955 kfree(hdr);
3956
3957 return retval;
3958}
3959
3960/*
3961 * File operations structure for management interface
3962 */
3963static const struct file_operations pmcraid_fops = {
3964 .owner = THIS_MODULE,
3965 .open = pmcraid_chr_open,
3966 .fasync = pmcraid_chr_fasync,
3967 .unlocked_ioctl = pmcraid_chr_ioctl,
3968 .compat_ioctl = compat_ptr_ioctl,
3969 .llseek = noop_llseek,
3970};
3971
3972
3973
3974
3975/**
3976 * pmcraid_show_log_level - Display adapter's error logging level
3977 * @dev: class device struct
3978 * @attr: unused
3979 * @buf: buffer
3980 *
3981 * Return value:
3982 * number of bytes printed to buffer
3983 */
3984static ssize_t pmcraid_show_log_level(
3985 struct device *dev,
3986 struct device_attribute *attr,
3987 char *buf)
3988{
3989 struct Scsi_Host *shost = class_to_shost(dev);
3990 struct pmcraid_instance *pinstance =
3991 (struct pmcraid_instance *)shost->hostdata;
3992 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
3993}
3994
3995/**
3996 * pmcraid_store_log_level - Change the adapter's error logging level
3997 * @dev: class device struct
3998 * @attr: unused
3999 * @buf: buffer
4000 * @count: not used
4001 *
4002 * Return value:
4003 * number of bytes printed to buffer
4004 */
4005static ssize_t pmcraid_store_log_level(
4006 struct device *dev,
4007 struct device_attribute *attr,
4008 const char *buf,
4009 size_t count
4010)
4011{
4012 struct Scsi_Host *shost;
4013 struct pmcraid_instance *pinstance;
4014 u8 val;
4015
4016 if (kstrtou8(buf, 10, &val))
4017 return -EINVAL;
4018 /* log-level should be from 0 to 2 */
4019 if (val > 2)
4020 return -EINVAL;
4021
4022 shost = class_to_shost(dev);
4023 pinstance = (struct pmcraid_instance *)shost->hostdata;
4024 pinstance->current_log_level = val;
4025
4026 return strlen(buf);
4027}
4028
4029static struct device_attribute pmcraid_log_level_attr = {
4030 .attr = {
4031 .name = "log_level",
4032 .mode = S_IRUGO | S_IWUSR,
4033 },
4034 .show = pmcraid_show_log_level,
4035 .store = pmcraid_store_log_level,
4036};
4037
4038/**
4039 * pmcraid_show_drv_version - Display driver version
4040 * @dev: class device struct
4041 * @attr: unused
4042 * @buf: buffer
4043 *
4044 * Return value:
4045 * number of bytes printed to buffer
4046 */
4047static ssize_t pmcraid_show_drv_version(
4048 struct device *dev,
4049 struct device_attribute *attr,
4050 char *buf
4051)
4052{
4053 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4054 PMCRAID_DRIVER_VERSION);
4055}
4056
4057static struct device_attribute pmcraid_driver_version_attr = {
4058 .attr = {
4059 .name = "drv_version",
4060 .mode = S_IRUGO,
4061 },
4062 .show = pmcraid_show_drv_version,
4063};
4064
4065/**
4066 * pmcraid_show_adapter_id - Display driver assigned adapter id
4067 * @dev: class device struct
4068 * @attr: unused
4069 * @buf: buffer
4070 *
4071 * Return value:
4072 * number of bytes printed to buffer
4073 */
4074static ssize_t pmcraid_show_adapter_id(
4075 struct device *dev,
4076 struct device_attribute *attr,
4077 char *buf
4078)
4079{
4080 struct Scsi_Host *shost = class_to_shost(dev);
4081 struct pmcraid_instance *pinstance =
4082 (struct pmcraid_instance *)shost->hostdata;
4083 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4084 pinstance->pdev->devfn;
4085 u32 aen_group = pmcraid_event_family.id;
4086
4087 return snprintf(buf, PAGE_SIZE,
4088 "adapter id: %d\nminor: %d\naen group: %d\n",
4089 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4090}
4091
4092static struct device_attribute pmcraid_adapter_id_attr = {
4093 .attr = {
4094 .name = "adapter_id",
4095 .mode = S_IRUGO,
4096 },
4097 .show = pmcraid_show_adapter_id,
4098};
4099
4100static struct device_attribute *pmcraid_host_attrs[] = {
4101 &pmcraid_log_level_attr,
4102 &pmcraid_driver_version_attr,
4103 &pmcraid_adapter_id_attr,
4104 NULL,
4105};
4106
4107
4108/* host template structure for pmcraid driver */
4109static struct scsi_host_template pmcraid_host_template = {
4110 .module = THIS_MODULE,
4111 .name = PMCRAID_DRIVER_NAME,
4112 .queuecommand = pmcraid_queuecommand,
4113 .eh_abort_handler = pmcraid_eh_abort_handler,
4114 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4115 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4116 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4117 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4118
4119 .slave_alloc = pmcraid_slave_alloc,
4120 .slave_configure = pmcraid_slave_configure,
4121 .slave_destroy = pmcraid_slave_destroy,
4122 .change_queue_depth = pmcraid_change_queue_depth,
4123 .can_queue = PMCRAID_MAX_IO_CMD,
4124 .this_id = -1,
4125 .sg_tablesize = PMCRAID_MAX_IOADLS,
4126 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4127 .no_write_same = 1,
4128 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4129 .shost_attrs = pmcraid_host_attrs,
4130 .proc_name = PMCRAID_DRIVER_NAME,
4131};
4132
4133/*
4134 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4135 * @irq: interrupt vector number
4136 * @dev_id: pointer hrrq_vector
4137 *
4138 * Return Value
4139 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4140 */
4141
4142static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4143{
4144 struct pmcraid_isr_param *hrrq_vector;
4145 struct pmcraid_instance *pinstance;
4146 unsigned long lock_flags;
4147 u32 intrs_val;
4148 int hrrq_id;
4149
4150 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4151 hrrq_id = hrrq_vector->hrrq_id;
4152 pinstance = hrrq_vector->drv_inst;
4153
4154 if (!hrrq_id) {
4155 /* Read the interrupt */
4156 intrs_val = pmcraid_read_interrupts(pinstance);
4157 if (intrs_val &&
4158 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4159 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4160 /* Any error interrupts including unit_check,
4161 * initiate IOA reset.In case of unit check indicate
4162 * to reset_sequence that IOA unit checked and prepare
4163 * for a dump during reset sequence
4164 */
4165 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4166 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4167 pinstance->ioa_unit_check = 1;
4168
4169 pmcraid_err("ISR: error interrupts: %x \
4170 initiating reset\n", intrs_val);
4171 spin_lock_irqsave(pinstance->host->host_lock,
4172 lock_flags);
4173 pmcraid_initiate_reset(pinstance);
4174 spin_unlock_irqrestore(
4175 pinstance->host->host_lock,
4176 lock_flags);
4177 }
4178 /* If interrupt was as part of the ioa initialization,
4179 * clear it. Delete the timer and wakeup the
4180 * reset engine to proceed with reset sequence
4181 */
4182 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4183 pmcraid_clr_trans_op(pinstance);
4184
4185 /* Clear the interrupt register by writing
4186 * to host to ioa doorbell. Once done
4187 * FW will clear the interrupt.
4188 */
4189 iowrite32(DOORBELL_INTR_MSIX_CLR,
4190 pinstance->int_regs.host_ioa_interrupt_reg);
4191 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4192
4193
4194 }
4195 }
4196
4197 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4198
4199 return IRQ_HANDLED;
4200}
4201
4202/**
4203 * pmcraid_isr - implements legacy interrupt handling routine
4204 *
4205 * @irq: interrupt vector number
4206 * @dev_id: pointer hrrq_vector
4207 *
4208 * Return Value
4209 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4210 */
4211static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4212{
4213 struct pmcraid_isr_param *hrrq_vector;
4214 struct pmcraid_instance *pinstance;
4215 u32 intrs;
4216 unsigned long lock_flags;
4217 int hrrq_id = 0;
4218
4219 /* In case of legacy interrupt mode where interrupts are shared across
4220 * isrs, it may be possible that the current interrupt is not from IOA
4221 */
4222 if (!dev_id) {
4223 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4224 return IRQ_NONE;
4225 }
4226 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4227 pinstance = hrrq_vector->drv_inst;
4228
4229 intrs = pmcraid_read_interrupts(pinstance);
4230
4231 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4232 return IRQ_NONE;
4233
4234 /* Any error interrupts including unit_check, initiate IOA reset.
4235 * In case of unit check indicate to reset_sequence that IOA unit
4236 * checked and prepare for a dump during reset sequence
4237 */
4238 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4239
4240 if (intrs & INTRS_IOA_UNIT_CHECK)
4241 pinstance->ioa_unit_check = 1;
4242
4243 iowrite32(intrs,
4244 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4245 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4246 intrs);
4247 intrs = ioread32(
4248 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4249 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4250 pmcraid_initiate_reset(pinstance);
4251 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4252 } else {
4253 /* If interrupt was as part of the ioa initialization,
4254 * clear. Delete the timer and wakeup the
4255 * reset engine to proceed with reset sequence
4256 */
4257 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4258 pmcraid_clr_trans_op(pinstance);
4259 } else {
4260 iowrite32(intrs,
4261 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4262 ioread32(
4263 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4264
4265 tasklet_schedule(
4266 &(pinstance->isr_tasklet[hrrq_id]));
4267 }
4268 }
4269
4270 return IRQ_HANDLED;
4271}
4272
4273
4274/**
4275 * pmcraid_worker_function - worker thread function
4276 *
4277 * @workp: pointer to struct work queue
4278 *
4279 * Return Value
4280 * None
4281 */
4282
4283static void pmcraid_worker_function(struct work_struct *workp)
4284{
4285 struct pmcraid_instance *pinstance;
4286 struct pmcraid_resource_entry *res;
4287 struct pmcraid_resource_entry *temp;
4288 struct scsi_device *sdev;
4289 unsigned long lock_flags;
4290 unsigned long host_lock_flags;
4291 u16 fw_version;
4292 u8 bus, target, lun;
4293
4294 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4295 /* add resources only after host is added into system */
4296 if (!atomic_read(&pinstance->expose_resources))
4297 return;
4298
4299 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4300
4301 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4302 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4303
4304 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4305 sdev = res->scsi_dev;
4306
4307 /* host_lock must be held before calling
4308 * scsi_device_get
4309 */
4310 spin_lock_irqsave(pinstance->host->host_lock,
4311 host_lock_flags);
4312 if (!scsi_device_get(sdev)) {
4313 spin_unlock_irqrestore(
4314 pinstance->host->host_lock,
4315 host_lock_flags);
4316 pmcraid_info("deleting %x from midlayer\n",
4317 res->cfg_entry.resource_address);
4318 list_move_tail(&res->queue,
4319 &pinstance->free_res_q);
4320 spin_unlock_irqrestore(
4321 &pinstance->resource_lock,
4322 lock_flags);
4323 scsi_remove_device(sdev);
4324 scsi_device_put(sdev);
4325 spin_lock_irqsave(&pinstance->resource_lock,
4326 lock_flags);
4327 res->change_detected = 0;
4328 } else {
4329 spin_unlock_irqrestore(
4330 pinstance->host->host_lock,
4331 host_lock_flags);
4332 }
4333 }
4334 }
4335
4336 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4337
4338 if (res->change_detected == RES_CHANGE_ADD) {
4339
4340 if (!pmcraid_expose_resource(fw_version,
4341 &res->cfg_entry))
4342 continue;
4343
4344 if (RES_IS_VSET(res->cfg_entry)) {
4345 bus = PMCRAID_VSET_BUS_ID;
4346 if (fw_version <= PMCRAID_FW_VERSION_1)
4347 target = res->cfg_entry.unique_flags1;
4348 else
4349 target = le16_to_cpu(res->cfg_entry.array_id) & 0xFF;
4350 lun = PMCRAID_VSET_LUN_ID;
4351 } else {
4352 bus = PMCRAID_PHYS_BUS_ID;
4353 target =
4354 RES_TARGET(
4355 res->cfg_entry.resource_address);
4356 lun = RES_LUN(res->cfg_entry.resource_address);
4357 }
4358
4359 res->change_detected = 0;
4360 spin_unlock_irqrestore(&pinstance->resource_lock,
4361 lock_flags);
4362 scsi_add_device(pinstance->host, bus, target, lun);
4363 spin_lock_irqsave(&pinstance->resource_lock,
4364 lock_flags);
4365 }
4366 }
4367
4368 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4369}
4370
4371/**
4372 * pmcraid_tasklet_function - Tasklet function
4373 *
4374 * @instance: pointer to msix param structure
4375 *
4376 * Return Value
4377 * None
4378 */
4379static void pmcraid_tasklet_function(unsigned long instance)
4380{
4381 struct pmcraid_isr_param *hrrq_vector;
4382 struct pmcraid_instance *pinstance;
4383 unsigned long hrrq_lock_flags;
4384 unsigned long pending_lock_flags;
4385 unsigned long host_lock_flags;
4386 spinlock_t *lockp; /* hrrq buffer lock */
4387 int id;
4388 u32 resp;
4389
4390 hrrq_vector = (struct pmcraid_isr_param *)instance;
4391 pinstance = hrrq_vector->drv_inst;
4392 id = hrrq_vector->hrrq_id;
4393 lockp = &(pinstance->hrrq_lock[id]);
4394
4395 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4396 * protected by its own lock. Traversals must be done within this lock
4397 * as there may be multiple tasklets running on multiple CPUs. Note
4398 * that the lock is held just for picking up the response handle and
4399 * manipulating hrrq_curr/toggle_bit values.
4400 */
4401 spin_lock_irqsave(lockp, hrrq_lock_flags);
4402
4403 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4404
4405 while ((resp & HRRQ_TOGGLE_BIT) ==
4406 pinstance->host_toggle_bit[id]) {
4407
4408 int cmd_index = resp >> 2;
4409 struct pmcraid_cmd *cmd = NULL;
4410
4411 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4412 pinstance->hrrq_curr[id]++;
4413 } else {
4414 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4415 pinstance->host_toggle_bit[id] ^= 1u;
4416 }
4417
4418 if (cmd_index >= PMCRAID_MAX_CMD) {
4419 /* In case of invalid response handle, log message */
4420 pmcraid_err("Invalid response handle %d\n", cmd_index);
4421 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4422 continue;
4423 }
4424
4425 cmd = pinstance->cmd_list[cmd_index];
4426 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4427
4428 spin_lock_irqsave(&pinstance->pending_pool_lock,
4429 pending_lock_flags);
4430 list_del(&cmd->free_list);
4431 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4432 pending_lock_flags);
4433 del_timer(&cmd->timer);
4434 atomic_dec(&pinstance->outstanding_cmds);
4435
4436 if (cmd->cmd_done == pmcraid_ioa_reset) {
4437 spin_lock_irqsave(pinstance->host->host_lock,
4438 host_lock_flags);
4439 cmd->cmd_done(cmd);
4440 spin_unlock_irqrestore(pinstance->host->host_lock,
4441 host_lock_flags);
4442 } else if (cmd->cmd_done != NULL) {
4443 cmd->cmd_done(cmd);
4444 }
4445 /* loop over until we are done with all responses */
4446 spin_lock_irqsave(lockp, hrrq_lock_flags);
4447 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4448 }
4449
4450 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4451}
4452
4453/**
4454 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4455 * @pinstance: pointer to adapter instance structure
4456 *
4457 * This routine un-registers registered interrupt handler and
4458 * also frees irqs/vectors.
4459 *
4460 * Retun Value
4461 * None
4462 */
4463static
4464void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4465{
4466 struct pci_dev *pdev = pinstance->pdev;
4467 int i;
4468
4469 for (i = 0; i < pinstance->num_hrrq; i++)
4470 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4471
4472 pinstance->interrupt_mode = 0;
4473 pci_free_irq_vectors(pdev);
4474}
4475
4476/**
4477 * pmcraid_register_interrupt_handler - registers interrupt handler
4478 * @pinstance: pointer to per-adapter instance structure
4479 *
4480 * Return Value
4481 * 0 on success, non-zero error code otherwise.
4482 */
4483static int
4484pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4485{
4486 struct pci_dev *pdev = pinstance->pdev;
4487 unsigned int irq_flag = PCI_IRQ_LEGACY, flag;
4488 int num_hrrq, rc, i;
4489 irq_handler_t isr;
4490
4491 if (pmcraid_enable_msix)
4492 irq_flag |= PCI_IRQ_MSIX;
4493
4494 num_hrrq = pci_alloc_irq_vectors(pdev, 1, PMCRAID_NUM_MSIX_VECTORS,
4495 irq_flag);
4496 if (num_hrrq < 0)
4497 return num_hrrq;
4498
4499 if (pdev->msix_enabled) {
4500 flag = 0;
4501 isr = pmcraid_isr_msix;
4502 } else {
4503 flag = IRQF_SHARED;
4504 isr = pmcraid_isr;
4505 }
4506
4507 for (i = 0; i < num_hrrq; i++) {
4508 struct pmcraid_isr_param *vec = &pinstance->hrrq_vector[i];
4509
4510 vec->hrrq_id = i;
4511 vec->drv_inst = pinstance;
4512 rc = request_irq(pci_irq_vector(pdev, i), isr, flag,
4513 PMCRAID_DRIVER_NAME, vec);
4514 if (rc)
4515 goto out_unwind;
4516 }
4517
4518 pinstance->num_hrrq = num_hrrq;
4519 if (pdev->msix_enabled) {
4520 pinstance->interrupt_mode = 1;
4521 iowrite32(DOORBELL_INTR_MODE_MSIX,
4522 pinstance->int_regs.host_ioa_interrupt_reg);
4523 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4524 }
4525
4526 return 0;
4527
4528out_unwind:
4529 while (--i > 0)
4530 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4531 pci_free_irq_vectors(pdev);
4532 return rc;
4533}
4534
4535/**
4536 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4537 * @pinstance: per adapter instance structure pointer
4538 * @max_index: number of buffer blocks to release
4539 *
4540 * Return Value
4541 * None
4542 */
4543static void
4544pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4545{
4546 int i;
4547 for (i = 0; i < max_index; i++) {
4548 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4549 pinstance->cmd_list[i] = NULL;
4550 }
4551 kmem_cache_destroy(pinstance->cmd_cachep);
4552 pinstance->cmd_cachep = NULL;
4553}
4554
4555/**
4556 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4557 * @pinstance: pointer to per adapter instance structure
4558 * @max_index: number of buffers (from 0 onwards) to release
4559 *
4560 * This function assumes that the command blocks for which control blocks are
4561 * linked are not released.
4562 *
4563 * Return Value
4564 * None
4565 */
4566static void
4567pmcraid_release_control_blocks(
4568 struct pmcraid_instance *pinstance,
4569 int max_index
4570)
4571{
4572 int i;
4573
4574 if (pinstance->control_pool == NULL)
4575 return;
4576
4577 for (i = 0; i < max_index; i++) {
4578 dma_pool_free(pinstance->control_pool,
4579 pinstance->cmd_list[i]->ioa_cb,
4580 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4581 pinstance->cmd_list[i]->ioa_cb = NULL;
4582 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4583 }
4584 dma_pool_destroy(pinstance->control_pool);
4585 pinstance->control_pool = NULL;
4586}
4587
4588/**
4589 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4590 * @pinstance: pointer to per adapter instance structure
4591 *
4592 * Allocates memory for command blocks using kernel slab allocator.
4593 *
4594 * Return Value
4595 * 0 in case of success; -ENOMEM in case of failure
4596 */
4597static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4598{
4599 int i;
4600
4601 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4602 pinstance->host->unique_id);
4603
4604
4605 pinstance->cmd_cachep = kmem_cache_create(
4606 pinstance->cmd_pool_name,
4607 sizeof(struct pmcraid_cmd), 0,
4608 SLAB_HWCACHE_ALIGN, NULL);
4609 if (!pinstance->cmd_cachep)
4610 return -ENOMEM;
4611
4612 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4613 pinstance->cmd_list[i] =
4614 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4615 if (!pinstance->cmd_list[i]) {
4616 pmcraid_release_cmd_blocks(pinstance, i);
4617 return -ENOMEM;
4618 }
4619 }
4620 return 0;
4621}
4622
4623/**
4624 * pmcraid_allocate_control_blocks - allocates memory control blocks
4625 * @pinstance : pointer to per adapter instance structure
4626 *
4627 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4628 * and IOASAs. This is called after command blocks are already allocated.
4629 *
4630 * Return Value
4631 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4632 */
4633static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4634{
4635 int i;
4636
4637 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4638 pinstance->host->unique_id);
4639
4640 pinstance->control_pool =
4641 dma_pool_create(pinstance->ctl_pool_name,
4642 &pinstance->pdev->dev,
4643 sizeof(struct pmcraid_control_block),
4644 PMCRAID_IOARCB_ALIGNMENT, 0);
4645
4646 if (!pinstance->control_pool)
4647 return -ENOMEM;
4648
4649 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4650 pinstance->cmd_list[i]->ioa_cb =
4651 dma_pool_zalloc(
4652 pinstance->control_pool,
4653 GFP_KERNEL,
4654 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4655
4656 if (!pinstance->cmd_list[i]->ioa_cb) {
4657 pmcraid_release_control_blocks(pinstance, i);
4658 return -ENOMEM;
4659 }
4660 }
4661 return 0;
4662}
4663
4664/**
4665 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4666 * @pinstance: pointer to per adapter instance structure
4667 * @maxindex: size of hrrq buffer pointer array
4668 *
4669 * Return Value
4670 * None
4671 */
4672static void
4673pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4674{
4675 int i;
4676
4677 for (i = 0; i < maxindex; i++) {
4678 dma_free_coherent(&pinstance->pdev->dev,
4679 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4680 pinstance->hrrq_start[i],
4681 pinstance->hrrq_start_bus_addr[i]);
4682
4683 /* reset pointers and toggle bit to zeros */
4684 pinstance->hrrq_start[i] = NULL;
4685 pinstance->hrrq_start_bus_addr[i] = 0;
4686 pinstance->host_toggle_bit[i] = 0;
4687 }
4688}
4689
4690/**
4691 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4692 * @pinstance: pointer to per adapter instance structure
4693 *
4694 * Return value
4695 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4696 */
4697static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4698{
4699 int i, buffer_size;
4700
4701 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4702
4703 for (i = 0; i < pinstance->num_hrrq; i++) {
4704 pinstance->hrrq_start[i] =
4705 dma_alloc_coherent(&pinstance->pdev->dev, buffer_size,
4706 &pinstance->hrrq_start_bus_addr[i],
4707 GFP_KERNEL);
4708 if (!pinstance->hrrq_start[i]) {
4709 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4710 i);
4711 pmcraid_release_host_rrqs(pinstance, i);
4712 return -ENOMEM;
4713 }
4714
4715 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4716 pinstance->hrrq_end[i] =
4717 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4718 pinstance->host_toggle_bit[i] = 1;
4719 spin_lock_init(&pinstance->hrrq_lock[i]);
4720 }
4721 return 0;
4722}
4723
4724/**
4725 * pmcraid_release_hcams - release HCAM buffers
4726 *
4727 * @pinstance: pointer to per adapter instance structure
4728 *
4729 * Return value
4730 * none
4731 */
4732static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4733{
4734 if (pinstance->ccn.msg != NULL) {
4735 dma_free_coherent(&pinstance->pdev->dev,
4736 PMCRAID_AEN_HDR_SIZE +
4737 sizeof(struct pmcraid_hcam_ccn_ext),
4738 pinstance->ccn.msg,
4739 pinstance->ccn.baddr);
4740
4741 pinstance->ccn.msg = NULL;
4742 pinstance->ccn.hcam = NULL;
4743 pinstance->ccn.baddr = 0;
4744 }
4745
4746 if (pinstance->ldn.msg != NULL) {
4747 dma_free_coherent(&pinstance->pdev->dev,
4748 PMCRAID_AEN_HDR_SIZE +
4749 sizeof(struct pmcraid_hcam_ldn),
4750 pinstance->ldn.msg,
4751 pinstance->ldn.baddr);
4752
4753 pinstance->ldn.msg = NULL;
4754 pinstance->ldn.hcam = NULL;
4755 pinstance->ldn.baddr = 0;
4756 }
4757}
4758
4759/**
4760 * pmcraid_allocate_hcams - allocates HCAM buffers
4761 * @pinstance : pointer to per adapter instance structure
4762 *
4763 * Return Value:
4764 * 0 in case of successful allocation, non-zero otherwise
4765 */
4766static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4767{
4768 pinstance->ccn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4769 PMCRAID_AEN_HDR_SIZE +
4770 sizeof(struct pmcraid_hcam_ccn_ext),
4771 &pinstance->ccn.baddr, GFP_KERNEL);
4772
4773 pinstance->ldn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4774 PMCRAID_AEN_HDR_SIZE +
4775 sizeof(struct pmcraid_hcam_ldn),
4776 &pinstance->ldn.baddr, GFP_KERNEL);
4777
4778 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
4779 pmcraid_release_hcams(pinstance);
4780 } else {
4781 pinstance->ccn.hcam =
4782 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
4783 pinstance->ldn.hcam =
4784 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
4785
4786 atomic_set(&pinstance->ccn.ignore, 0);
4787 atomic_set(&pinstance->ldn.ignore, 0);
4788 }
4789
4790 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
4791}
4792
4793/**
4794 * pmcraid_release_config_buffers - release config.table buffers
4795 * @pinstance: pointer to per adapter instance structure
4796 *
4797 * Return Value
4798 * none
4799 */
4800static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
4801{
4802 if (pinstance->cfg_table != NULL &&
4803 pinstance->cfg_table_bus_addr != 0) {
4804 dma_free_coherent(&pinstance->pdev->dev,
4805 sizeof(struct pmcraid_config_table),
4806 pinstance->cfg_table,
4807 pinstance->cfg_table_bus_addr);
4808 pinstance->cfg_table = NULL;
4809 pinstance->cfg_table_bus_addr = 0;
4810 }
4811
4812 if (pinstance->res_entries != NULL) {
4813 int i;
4814
4815 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4816 list_del(&pinstance->res_entries[i].queue);
4817 kfree(pinstance->res_entries);
4818 pinstance->res_entries = NULL;
4819 }
4820
4821 pmcraid_release_hcams(pinstance);
4822}
4823
4824/**
4825 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
4826 * @pinstance : pointer to per adapter instance structure
4827 *
4828 * Return Value
4829 * 0 for successful allocation, -ENOMEM for any failure
4830 */
4831static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
4832{
4833 int i;
4834
4835 pinstance->res_entries =
4836 kcalloc(PMCRAID_MAX_RESOURCES,
4837 sizeof(struct pmcraid_resource_entry),
4838 GFP_KERNEL);
4839
4840 if (NULL == pinstance->res_entries) {
4841 pmcraid_err("failed to allocate memory for resource table\n");
4842 return -ENOMEM;
4843 }
4844
4845 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4846 list_add_tail(&pinstance->res_entries[i].queue,
4847 &pinstance->free_res_q);
4848
4849 pinstance->cfg_table = dma_alloc_coherent(&pinstance->pdev->dev,
4850 sizeof(struct pmcraid_config_table),
4851 &pinstance->cfg_table_bus_addr,
4852 GFP_KERNEL);
4853
4854 if (NULL == pinstance->cfg_table) {
4855 pmcraid_err("couldn't alloc DMA memory for config table\n");
4856 pmcraid_release_config_buffers(pinstance);
4857 return -ENOMEM;
4858 }
4859
4860 if (pmcraid_allocate_hcams(pinstance)) {
4861 pmcraid_err("could not alloc DMA memory for HCAMS\n");
4862 pmcraid_release_config_buffers(pinstance);
4863 return -ENOMEM;
4864 }
4865
4866 return 0;
4867}
4868
4869/**
4870 * pmcraid_init_tasklets - registers tasklets for response handling
4871 *
4872 * @pinstance: pointer adapter instance structure
4873 *
4874 * Return value
4875 * none
4876 */
4877static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
4878{
4879 int i;
4880 for (i = 0; i < pinstance->num_hrrq; i++)
4881 tasklet_init(&pinstance->isr_tasklet[i],
4882 pmcraid_tasklet_function,
4883 (unsigned long)&pinstance->hrrq_vector[i]);
4884}
4885
4886/**
4887 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
4888 *
4889 * @pinstance: pointer to adapter instance structure
4890 *
4891 * Return value
4892 * none
4893 */
4894static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
4895{
4896 int i;
4897 for (i = 0; i < pinstance->num_hrrq; i++)
4898 tasklet_kill(&pinstance->isr_tasklet[i]);
4899}
4900
4901/**
4902 * pmcraid_release_buffers - release per-adapter buffers allocated
4903 *
4904 * @pinstance: pointer to adapter soft state
4905 *
4906 * Return Value
4907 * none
4908 */
4909static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
4910{
4911 pmcraid_release_config_buffers(pinstance);
4912 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
4913 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4914 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4915
4916 if (pinstance->inq_data != NULL) {
4917 dma_free_coherent(&pinstance->pdev->dev,
4918 sizeof(struct pmcraid_inquiry_data),
4919 pinstance->inq_data,
4920 pinstance->inq_data_baddr);
4921
4922 pinstance->inq_data = NULL;
4923 pinstance->inq_data_baddr = 0;
4924 }
4925
4926 if (pinstance->timestamp_data != NULL) {
4927 dma_free_coherent(&pinstance->pdev->dev,
4928 sizeof(struct pmcraid_timestamp_data),
4929 pinstance->timestamp_data,
4930 pinstance->timestamp_data_baddr);
4931
4932 pinstance->timestamp_data = NULL;
4933 pinstance->timestamp_data_baddr = 0;
4934 }
4935}
4936
4937/**
4938 * pmcraid_init_buffers - allocates memory and initializes various structures
4939 * @pinstance: pointer to per adapter instance structure
4940 *
4941 * This routine pre-allocates memory based on the type of block as below:
4942 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
4943 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
4944 * config-table entries : DMAable memory using dma_alloc_coherent
4945 * HostRRQs : DMAable memory, using dma_alloc_coherent
4946 *
4947 * Return Value
4948 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
4949 */
4950static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
4951{
4952 int i;
4953
4954 if (pmcraid_allocate_host_rrqs(pinstance)) {
4955 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
4956 pinstance->num_hrrq);
4957 return -ENOMEM;
4958 }
4959
4960 if (pmcraid_allocate_config_buffers(pinstance)) {
4961 pmcraid_err("couldn't allocate memory for config buffers\n");
4962 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4963 return -ENOMEM;
4964 }
4965
4966 if (pmcraid_allocate_cmd_blocks(pinstance)) {
4967 pmcraid_err("couldn't allocate memory for cmd blocks\n");
4968 pmcraid_release_config_buffers(pinstance);
4969 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4970 return -ENOMEM;
4971 }
4972
4973 if (pmcraid_allocate_control_blocks(pinstance)) {
4974 pmcraid_err("couldn't allocate memory control blocks\n");
4975 pmcraid_release_config_buffers(pinstance);
4976 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4977 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4978 return -ENOMEM;
4979 }
4980
4981 /* allocate DMAable memory for page D0 INQUIRY buffer */
4982 pinstance->inq_data = dma_alloc_coherent(&pinstance->pdev->dev,
4983 sizeof(struct pmcraid_inquiry_data),
4984 &pinstance->inq_data_baddr, GFP_KERNEL);
4985 if (pinstance->inq_data == NULL) {
4986 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
4987 pmcraid_release_buffers(pinstance);
4988 return -ENOMEM;
4989 }
4990
4991 /* allocate DMAable memory for set timestamp data buffer */
4992 pinstance->timestamp_data = dma_alloc_coherent(&pinstance->pdev->dev,
4993 sizeof(struct pmcraid_timestamp_data),
4994 &pinstance->timestamp_data_baddr,
4995 GFP_KERNEL);
4996 if (pinstance->timestamp_data == NULL) {
4997 pmcraid_err("couldn't allocate DMA memory for \
4998 set time_stamp \n");
4999 pmcraid_release_buffers(pinstance);
5000 return -ENOMEM;
5001 }
5002
5003
5004 /* Initialize all the command blocks and add them to free pool. No
5005 * need to lock (free_pool_lock) as this is done in initialization
5006 * itself
5007 */
5008 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5009 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5010 pmcraid_init_cmdblk(cmdp, i);
5011 cmdp->drv_inst = pinstance;
5012 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5013 }
5014
5015 return 0;
5016}
5017
5018/**
5019 * pmcraid_reinit_buffers - resets various buffer pointers
5020 * @pinstance: pointer to adapter instance
5021 * Return value
5022 * none
5023 */
5024static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5025{
5026 int i;
5027 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5028
5029 for (i = 0; i < pinstance->num_hrrq; i++) {
5030 memset(pinstance->hrrq_start[i], 0, buffer_size);
5031 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5032 pinstance->hrrq_end[i] =
5033 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5034 pinstance->host_toggle_bit[i] = 1;
5035 }
5036}
5037
5038/**
5039 * pmcraid_init_instance - initialize per instance data structure
5040 * @pdev: pointer to pci device structure
5041 * @host: pointer to Scsi_Host structure
5042 * @mapped_pci_addr: memory mapped IOA configuration registers
5043 *
5044 * Return Value
5045 * 0 on success, non-zero in case of any failure
5046 */
5047static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
5048 void __iomem *mapped_pci_addr)
5049{
5050 struct pmcraid_instance *pinstance =
5051 (struct pmcraid_instance *)host->hostdata;
5052
5053 pinstance->host = host;
5054 pinstance->pdev = pdev;
5055
5056 /* Initialize register addresses */
5057 pinstance->mapped_dma_addr = mapped_pci_addr;
5058
5059 /* Initialize chip-specific details */
5060 {
5061 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5062 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5063
5064 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5065
5066 pint_regs->ioa_host_interrupt_reg =
5067 mapped_pci_addr + chip_cfg->ioa_host_intr;
5068 pint_regs->ioa_host_interrupt_clr_reg =
5069 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5070 pint_regs->ioa_host_msix_interrupt_reg =
5071 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5072 pint_regs->host_ioa_interrupt_reg =
5073 mapped_pci_addr + chip_cfg->host_ioa_intr;
5074 pint_regs->host_ioa_interrupt_clr_reg =
5075 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5076
5077 /* Current version of firmware exposes interrupt mask set
5078 * and mask clr registers through memory mapped bar0.
5079 */
5080 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5081 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5082 pint_regs->ioa_host_interrupt_mask_reg =
5083 mapped_pci_addr + chip_cfg->ioa_host_mask;
5084 pint_regs->ioa_host_interrupt_mask_clr_reg =
5085 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5086 pint_regs->global_interrupt_mask_reg =
5087 mapped_pci_addr + chip_cfg->global_intr_mask;
5088 };
5089
5090 pinstance->ioa_reset_attempts = 0;
5091 init_waitqueue_head(&pinstance->reset_wait_q);
5092
5093 atomic_set(&pinstance->outstanding_cmds, 0);
5094 atomic_set(&pinstance->last_message_id, 0);
5095 atomic_set(&pinstance->expose_resources, 0);
5096
5097 INIT_LIST_HEAD(&pinstance->free_res_q);
5098 INIT_LIST_HEAD(&pinstance->used_res_q);
5099 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5100 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5101
5102 spin_lock_init(&pinstance->free_pool_lock);
5103 spin_lock_init(&pinstance->pending_pool_lock);
5104 spin_lock_init(&pinstance->resource_lock);
5105 mutex_init(&pinstance->aen_queue_lock);
5106
5107 /* Work-queue (Shared) for deferred processing error handling */
5108 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5109
5110 /* Initialize the default log_level */
5111 pinstance->current_log_level = pmcraid_log_level;
5112
5113 /* Setup variables required for reset engine */
5114 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5115 pinstance->reset_cmd = NULL;
5116 return 0;
5117}
5118
5119/**
5120 * pmcraid_shutdown - shutdown adapter controller.
5121 * @pdev: pci device struct
5122 *
5123 * Issues an adapter shutdown to the card waits for its completion
5124 *
5125 * Return value
5126 * none
5127 */
5128static void pmcraid_shutdown(struct pci_dev *pdev)
5129{
5130 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5131 pmcraid_reset_bringdown(pinstance);
5132}
5133
5134
5135/*
5136 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5137 */
5138static unsigned short pmcraid_get_minor(void)
5139{
5140 int minor;
5141
5142 minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
5143 __set_bit(minor, pmcraid_minor);
5144 return minor;
5145}
5146
5147/*
5148 * pmcraid_release_minor - releases given minor back to minor number bitmap
5149 */
5150static void pmcraid_release_minor(unsigned short minor)
5151{
5152 __clear_bit(minor, pmcraid_minor);
5153}
5154
5155/**
5156 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5157 *
5158 * @pinstance: pointer to adapter instance for which to register device
5159 *
5160 * Return value
5161 * 0 in case of success, otherwise non-zero
5162 */
5163static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5164{
5165 int minor;
5166 int error;
5167
5168 minor = pmcraid_get_minor();
5169 cdev_init(&pinstance->cdev, &pmcraid_fops);
5170 pinstance->cdev.owner = THIS_MODULE;
5171
5172 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5173
5174 if (error)
5175 pmcraid_release_minor(minor);
5176 else
5177 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5178 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5179 return error;
5180}
5181
5182/**
5183 * pmcraid_release_chrdev - unregisters per-adapter management interface
5184 *
5185 * @pinstance: pointer to adapter instance structure
5186 *
5187 * Return value
5188 * none
5189 */
5190static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5191{
5192 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5193 device_destroy(pmcraid_class,
5194 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5195 cdev_del(&pinstance->cdev);
5196}
5197
5198/**
5199 * pmcraid_remove - IOA hot plug remove entry point
5200 * @pdev: pci device struct
5201 *
5202 * Return value
5203 * none
5204 */
5205static void pmcraid_remove(struct pci_dev *pdev)
5206{
5207 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5208
5209 /* remove the management interface (/dev file) for this device */
5210 pmcraid_release_chrdev(pinstance);
5211
5212 /* remove host template from scsi midlayer */
5213 scsi_remove_host(pinstance->host);
5214
5215 /* block requests from mid-layer */
5216 scsi_block_requests(pinstance->host);
5217
5218 /* initiate shutdown adapter */
5219 pmcraid_shutdown(pdev);
5220
5221 pmcraid_disable_interrupts(pinstance, ~0);
5222 flush_work(&pinstance->worker_q);
5223
5224 pmcraid_kill_tasklets(pinstance);
5225 pmcraid_unregister_interrupt_handler(pinstance);
5226 pmcraid_release_buffers(pinstance);
5227 iounmap(pinstance->mapped_dma_addr);
5228 pci_release_regions(pdev);
5229 scsi_host_put(pinstance->host);
5230 pci_disable_device(pdev);
5231
5232 return;
5233}
5234
5235/**
5236 * pmcraid_suspend - driver suspend entry point for power management
5237 * @dev: Device structure
5238 *
5239 * Return Value - 0 always
5240 */
5241static int __maybe_unused pmcraid_suspend(struct device *dev)
5242{
5243 struct pci_dev *pdev = to_pci_dev(dev);
5244 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5245
5246 pmcraid_shutdown(pdev);
5247 pmcraid_disable_interrupts(pinstance, ~0);
5248 pmcraid_kill_tasklets(pinstance);
5249 pmcraid_unregister_interrupt_handler(pinstance);
5250
5251 return 0;
5252}
5253
5254/**
5255 * pmcraid_resume - driver resume entry point PCI power management
5256 * @dev: Device structure
5257 *
5258 * Return Value - 0 in case of success. Error code in case of any failure
5259 */
5260static int __maybe_unused pmcraid_resume(struct device *dev)
5261{
5262 struct pci_dev *pdev = to_pci_dev(dev);
5263 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5264 struct Scsi_Host *host = pinstance->host;
5265 int rc = 0;
5266
5267 if (sizeof(dma_addr_t) == 4 ||
5268 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
5269 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5270
5271 if (rc == 0)
5272 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
5273
5274 if (rc != 0) {
5275 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5276 goto disable_device;
5277 }
5278
5279 pmcraid_disable_interrupts(pinstance, ~0);
5280 atomic_set(&pinstance->outstanding_cmds, 0);
5281 rc = pmcraid_register_interrupt_handler(pinstance);
5282
5283 if (rc) {
5284 dev_err(&pdev->dev,
5285 "resume: couldn't register interrupt handlers\n");
5286 rc = -ENODEV;
5287 goto release_host;
5288 }
5289
5290 pmcraid_init_tasklets(pinstance);
5291 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5292
5293 /* Start with hard reset sequence which brings up IOA to operational
5294 * state as well as completes the reset sequence.
5295 */
5296 pinstance->ioa_hard_reset = 1;
5297
5298 /* Start IOA firmware initialization and bring card to Operational
5299 * state.
5300 */
5301 if (pmcraid_reset_bringup(pinstance)) {
5302 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5303 rc = -ENODEV;
5304 goto release_tasklets;
5305 }
5306
5307 return 0;
5308
5309release_tasklets:
5310 pmcraid_disable_interrupts(pinstance, ~0);
5311 pmcraid_kill_tasklets(pinstance);
5312 pmcraid_unregister_interrupt_handler(pinstance);
5313
5314release_host:
5315 scsi_host_put(host);
5316
5317disable_device:
5318
5319 return rc;
5320}
5321
5322/**
5323 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5324 * completion of the ioa reset
5325 * @cmd: pointer to reset command block
5326 */
5327static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5328{
5329 struct pmcraid_instance *pinstance = cmd->drv_inst;
5330 unsigned long flags;
5331
5332 spin_lock_irqsave(pinstance->host->host_lock, flags);
5333 pmcraid_ioa_reset(cmd);
5334 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5335 scsi_unblock_requests(pinstance->host);
5336 schedule_work(&pinstance->worker_q);
5337}
5338
5339/**
5340 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5341 *
5342 * @cmd: pointer to pmcraid_cmd structure
5343 *
5344 * Return Value
5345 * 0 for success or non-zero for failure cases
5346 */
5347static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5348{
5349 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5350 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5351
5352 pmcraid_reinit_cmdblk(cmd);
5353
5354 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5355 ioarcb->request_type = REQ_TYPE_IOACMD;
5356 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5357 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5358
5359 /* If this was called as part of resource table reinitialization due to
5360 * lost CCN, it is enough to return the command block back to free pool
5361 * as part of set_supported_devs completion function.
5362 */
5363 if (cmd->drv_inst->reinit_cfg_table) {
5364 cmd->drv_inst->reinit_cfg_table = 0;
5365 cmd->release = 1;
5366 cmd_done = pmcraid_reinit_cfgtable_done;
5367 }
5368
5369 /* we will be done with the reset sequence after set supported devices,
5370 * setup the done function to return the command block back to free
5371 * pool
5372 */
5373 pmcraid_send_cmd(cmd,
5374 cmd_done,
5375 PMCRAID_SET_SUP_DEV_TIMEOUT,
5376 pmcraid_timeout_handler);
5377 return;
5378}
5379
5380/**
5381 * pmcraid_set_timestamp - set the timestamp to IOAFP
5382 *
5383 * @cmd: pointer to pmcraid_cmd structure
5384 *
5385 * Return Value
5386 * 0 for success or non-zero for failure cases
5387 */
5388static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5389{
5390 struct pmcraid_instance *pinstance = cmd->drv_inst;
5391 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5392 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5393 struct pmcraid_ioadl_desc *ioadl;
5394 u64 timestamp;
5395
5396 timestamp = ktime_get_real_seconds() * 1000;
5397
5398 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5399 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5400 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5401 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5402 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5403 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5404
5405 pmcraid_reinit_cmdblk(cmd);
5406 ioarcb->request_type = REQ_TYPE_SCSI;
5407 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5408 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5409 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5410 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5411
5412 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5413 offsetof(struct pmcraid_ioarcb,
5414 add_data.u.ioadl[0]));
5415 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5416 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
5417
5418 ioarcb->request_flags0 |= NO_LINK_DESCS;
5419 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5420 ioarcb->data_transfer_length =
5421 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5422 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5423 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5424 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5425 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5426
5427 if (!pinstance->timestamp_error) {
5428 pinstance->timestamp_error = 0;
5429 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5430 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5431 } else {
5432 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5433 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5434 return;
5435 }
5436}
5437
5438
5439/**
5440 * pmcraid_init_res_table - Initialize the resource table
5441 * @cmd: pointer to pmcraid command struct
5442 *
5443 * This function looks through the existing resource table, comparing
5444 * it with the config table. This function will take care of old/new
5445 * devices and schedule adding/removing them from the mid-layer
5446 * as appropriate.
5447 *
5448 * Return value
5449 * None
5450 */
5451static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5452{
5453 struct pmcraid_instance *pinstance = cmd->drv_inst;
5454 struct pmcraid_resource_entry *res, *temp;
5455 struct pmcraid_config_table_entry *cfgte;
5456 unsigned long lock_flags;
5457 int found, rc, i;
5458 u16 fw_version;
5459 LIST_HEAD(old_res);
5460
5461 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5462 pmcraid_err("IOA requires microcode download\n");
5463
5464 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5465
5466 /* resource list is protected by pinstance->resource_lock.
5467 * init_res_table can be called from probe (user-thread) or runtime
5468 * reset (timer/tasklet)
5469 */
5470 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5471
5472 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5473 list_move_tail(&res->queue, &old_res);
5474
5475 for (i = 0; i < le16_to_cpu(pinstance->cfg_table->num_entries); i++) {
5476 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5477 PMCRAID_FW_VERSION_1)
5478 cfgte = &pinstance->cfg_table->entries[i];
5479 else
5480 cfgte = (struct pmcraid_config_table_entry *)
5481 &pinstance->cfg_table->entries_ext[i];
5482
5483 if (!pmcraid_expose_resource(fw_version, cfgte))
5484 continue;
5485
5486 found = 0;
5487
5488 /* If this entry was already detected and initialized */
5489 list_for_each_entry_safe(res, temp, &old_res, queue) {
5490
5491 rc = memcmp(&res->cfg_entry.resource_address,
5492 &cfgte->resource_address,
5493 sizeof(cfgte->resource_address));
5494 if (!rc) {
5495 list_move_tail(&res->queue,
5496 &pinstance->used_res_q);
5497 found = 1;
5498 break;
5499 }
5500 }
5501
5502 /* If this is new entry, initialize it and add it the queue */
5503 if (!found) {
5504
5505 if (list_empty(&pinstance->free_res_q)) {
5506 pmcraid_err("Too many devices attached\n");
5507 break;
5508 }
5509
5510 found = 1;
5511 res = list_entry(pinstance->free_res_q.next,
5512 struct pmcraid_resource_entry, queue);
5513
5514 res->scsi_dev = NULL;
5515 res->change_detected = RES_CHANGE_ADD;
5516 res->reset_progress = 0;
5517 list_move_tail(&res->queue, &pinstance->used_res_q);
5518 }
5519
5520 /* copy new configuration table entry details into driver
5521 * maintained resource entry
5522 */
5523 if (found) {
5524 memcpy(&res->cfg_entry, cfgte,
5525 pinstance->config_table_entry_size);
5526 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5527 res->cfg_entry.resource_type,
5528 (fw_version <= PMCRAID_FW_VERSION_1 ?
5529 res->cfg_entry.unique_flags1 :
5530 le16_to_cpu(res->cfg_entry.array_id) & 0xFF),
5531 le32_to_cpu(res->cfg_entry.resource_address));
5532 }
5533 }
5534
5535 /* Detect any deleted entries, mark them for deletion from mid-layer */
5536 list_for_each_entry_safe(res, temp, &old_res, queue) {
5537
5538 if (res->scsi_dev) {
5539 res->change_detected = RES_CHANGE_DEL;
5540 res->cfg_entry.resource_handle =
5541 PMCRAID_INVALID_RES_HANDLE;
5542 list_move_tail(&res->queue, &pinstance->used_res_q);
5543 } else {
5544 list_move_tail(&res->queue, &pinstance->free_res_q);
5545 }
5546 }
5547
5548 /* release the resource list lock */
5549 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5550 pmcraid_set_timestamp(cmd);
5551}
5552
5553/**
5554 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5555 * @cmd: pointer pmcraid_cmd struct
5556 *
5557 * This function sends a Query IOA Configuration command to the adapter to
5558 * retrieve the IOA configuration table.
5559 *
5560 * Return value:
5561 * none
5562 */
5563static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5564{
5565 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5566 struct pmcraid_ioadl_desc *ioadl;
5567 struct pmcraid_instance *pinstance = cmd->drv_inst;
5568 __be32 cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5569
5570 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5571 PMCRAID_FW_VERSION_1)
5572 pinstance->config_table_entry_size =
5573 sizeof(struct pmcraid_config_table_entry);
5574 else
5575 pinstance->config_table_entry_size =
5576 sizeof(struct pmcraid_config_table_entry_ext);
5577
5578 ioarcb->request_type = REQ_TYPE_IOACMD;
5579 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5580
5581 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5582
5583 /* firmware requires 4-byte length field, specified in B.E format */
5584 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5585
5586 /* Since entire config table can be described by single IOADL, it can
5587 * be part of IOARCB itself
5588 */
5589 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5590 offsetof(struct pmcraid_ioarcb,
5591 add_data.u.ioadl[0]));
5592 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5593 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
5594
5595 ioarcb->request_flags0 |= NO_LINK_DESCS;
5596 ioarcb->data_transfer_length =
5597 cpu_to_le32(sizeof(struct pmcraid_config_table));
5598
5599 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5600 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5601 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5602 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5603
5604 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5605 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5606}
5607
5608
5609/**
5610 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5611 * @pdev: pointer to pci device structure
5612 * @dev_id: pointer to device ids structure
5613 *
5614 * Return Value
5615 * returns 0 if the device is claimed and successfully configured.
5616 * returns non-zero error code in case of any failure
5617 */
5618static int pmcraid_probe(struct pci_dev *pdev,
5619 const struct pci_device_id *dev_id)
5620{
5621 struct pmcraid_instance *pinstance;
5622 struct Scsi_Host *host;
5623 void __iomem *mapped_pci_addr;
5624 int rc = PCIBIOS_SUCCESSFUL;
5625
5626 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5627 pmcraid_err
5628 ("maximum number(%d) of supported adapters reached\n",
5629 atomic_read(&pmcraid_adapter_count));
5630 return -ENOMEM;
5631 }
5632
5633 atomic_inc(&pmcraid_adapter_count);
5634 rc = pci_enable_device(pdev);
5635
5636 if (rc) {
5637 dev_err(&pdev->dev, "Cannot enable adapter\n");
5638 atomic_dec(&pmcraid_adapter_count);
5639 return rc;
5640 }
5641
5642 dev_info(&pdev->dev,
5643 "Found new IOA(%x:%x), Total IOA count: %d\n",
5644 pdev->vendor, pdev->device,
5645 atomic_read(&pmcraid_adapter_count));
5646
5647 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5648
5649 if (rc < 0) {
5650 dev_err(&pdev->dev,
5651 "Couldn't register memory range of registers\n");
5652 goto out_disable_device;
5653 }
5654
5655 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5656
5657 if (!mapped_pci_addr) {
5658 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5659 rc = -ENOMEM;
5660 goto out_release_regions;
5661 }
5662
5663 pci_set_master(pdev);
5664
5665 /* Firmware requires the system bus address of IOARCB to be within
5666 * 32-bit addressable range though it has 64-bit IOARRIN register.
5667 * However, firmware supports 64-bit streaming DMA buffers, whereas
5668 * coherent buffers are to be 32-bit. Since dma_alloc_coherent always
5669 * returns memory within 4GB (if not, change this logic), coherent
5670 * buffers are within firmware acceptable address ranges.
5671 */
5672 if (sizeof(dma_addr_t) == 4 ||
5673 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
5674 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5675
5676 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5677 * bit mask for dma_alloc_coherent to return addresses within 4GB
5678 */
5679 if (rc == 0)
5680 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
5681
5682 if (rc != 0) {
5683 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5684 goto cleanup_nomem;
5685 }
5686
5687 host = scsi_host_alloc(&pmcraid_host_template,
5688 sizeof(struct pmcraid_instance));
5689
5690 if (!host) {
5691 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5692 rc = -ENOMEM;
5693 goto cleanup_nomem;
5694 }
5695
5696 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5697 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5698 host->unique_id = host->host_no;
5699 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5700 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5701
5702 /* zero out entire instance structure */
5703 pinstance = (struct pmcraid_instance *)host->hostdata;
5704 memset(pinstance, 0, sizeof(*pinstance));
5705
5706 pinstance->chip_cfg =
5707 (struct pmcraid_chip_details *)(dev_id->driver_data);
5708
5709 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5710
5711 if (rc < 0) {
5712 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5713 goto out_scsi_host_put;
5714 }
5715
5716 pci_set_drvdata(pdev, pinstance);
5717
5718 /* Save PCI config-space for use following the reset */
5719 rc = pci_save_state(pinstance->pdev);
5720
5721 if (rc != 0) {
5722 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5723 goto out_scsi_host_put;
5724 }
5725
5726 pmcraid_disable_interrupts(pinstance, ~0);
5727
5728 rc = pmcraid_register_interrupt_handler(pinstance);
5729
5730 if (rc) {
5731 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
5732 goto out_scsi_host_put;
5733 }
5734
5735 pmcraid_init_tasklets(pinstance);
5736
5737 /* allocate verious buffers used by LLD.*/
5738 rc = pmcraid_init_buffers(pinstance);
5739
5740 if (rc) {
5741 pmcraid_err("couldn't allocate memory blocks\n");
5742 goto out_unregister_isr;
5743 }
5744
5745 /* check the reset type required */
5746 pmcraid_reset_type(pinstance);
5747
5748 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5749
5750 /* Start IOA firmware initialization and bring card to Operational
5751 * state.
5752 */
5753 pmcraid_info("starting IOA initialization sequence\n");
5754 if (pmcraid_reset_bringup(pinstance)) {
5755 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5756 rc = 1;
5757 goto out_release_bufs;
5758 }
5759
5760 /* Add adapter instance into mid-layer list */
5761 rc = scsi_add_host(pinstance->host, &pdev->dev);
5762 if (rc != 0) {
5763 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
5764 goto out_release_bufs;
5765 }
5766
5767 scsi_scan_host(pinstance->host);
5768
5769 rc = pmcraid_setup_chrdev(pinstance);
5770
5771 if (rc != 0) {
5772 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5773 rc);
5774 goto out_remove_host;
5775 }
5776
5777 /* Schedule worker thread to handle CCN and take care of adding and
5778 * removing devices to OS
5779 */
5780 atomic_set(&pinstance->expose_resources, 1);
5781 schedule_work(&pinstance->worker_q);
5782 return rc;
5783
5784out_remove_host:
5785 scsi_remove_host(host);
5786
5787out_release_bufs:
5788 pmcraid_release_buffers(pinstance);
5789
5790out_unregister_isr:
5791 pmcraid_kill_tasklets(pinstance);
5792 pmcraid_unregister_interrupt_handler(pinstance);
5793
5794out_scsi_host_put:
5795 scsi_host_put(host);
5796
5797cleanup_nomem:
5798 iounmap(mapped_pci_addr);
5799
5800out_release_regions:
5801 pci_release_regions(pdev);
5802
5803out_disable_device:
5804 atomic_dec(&pmcraid_adapter_count);
5805 pci_disable_device(pdev);
5806 return -ENODEV;
5807}
5808
5809static SIMPLE_DEV_PM_OPS(pmcraid_pm_ops, pmcraid_suspend, pmcraid_resume);
5810
5811/*
5812 * PCI driver structure of pmcraid driver
5813 */
5814static struct pci_driver pmcraid_driver = {
5815 .name = PMCRAID_DRIVER_NAME,
5816 .id_table = pmcraid_pci_table,
5817 .probe = pmcraid_probe,
5818 .remove = pmcraid_remove,
5819 .driver.pm = &pmcraid_pm_ops,
5820 .shutdown = pmcraid_shutdown
5821};
5822
5823/**
5824 * pmcraid_init - module load entry point
5825 */
5826static int __init pmcraid_init(void)
5827{
5828 dev_t dev;
5829 int error;
5830
5831 pmcraid_info("%s Device Driver version: %s\n",
5832 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
5833
5834 error = alloc_chrdev_region(&dev, 0,
5835 PMCRAID_MAX_ADAPTERS,
5836 PMCRAID_DEVFILE);
5837
5838 if (error) {
5839 pmcraid_err("failed to get a major number for adapters\n");
5840 goto out_init;
5841 }
5842
5843 pmcraid_major = MAJOR(dev);
5844 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
5845
5846 if (IS_ERR(pmcraid_class)) {
5847 error = PTR_ERR(pmcraid_class);
5848 pmcraid_err("failed to register with sysfs, error = %x\n",
5849 error);
5850 goto out_unreg_chrdev;
5851 }
5852
5853 error = pmcraid_netlink_init();
5854
5855 if (error) {
5856 class_destroy(pmcraid_class);
5857 goto out_unreg_chrdev;
5858 }
5859
5860 error = pci_register_driver(&pmcraid_driver);
5861
5862 if (error == 0)
5863 goto out_init;
5864
5865 pmcraid_err("failed to register pmcraid driver, error = %x\n",
5866 error);
5867 class_destroy(pmcraid_class);
5868 pmcraid_netlink_release();
5869
5870out_unreg_chrdev:
5871 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
5872
5873out_init:
5874 return error;
5875}
5876
5877/**
5878 * pmcraid_exit - module unload entry point
5879 */
5880static void __exit pmcraid_exit(void)
5881{
5882 pmcraid_netlink_release();
5883 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
5884 PMCRAID_MAX_ADAPTERS);
5885 pci_unregister_driver(&pmcraid_driver);
5886 class_destroy(pmcraid_class);
5887}
5888
5889module_init(pmcraid_init);
5890module_exit(pmcraid_exit);