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