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1/*
2 * PMC-Sierra SPC 8001 SAS/SATA based host adapters driver
3 *
4 * Copyright (c) 2008-2009 USI Co., Ltd.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
15 * ("Disclaimer") and any redistribution must be conditioned upon
16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
18 * 3. Neither the names of the above-listed copyright holders nor the names
19 * of any contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * Alternatively, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2 as published by the Free
24 * Software Foundation.
25 *
26 * NO WARRANTY
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGES.
38 *
39 */
40
41#include <linux/slab.h>
42#include "pm8001_sas.h"
43
44/**
45 * pm8001_find_tag - from sas task to find out tag that belongs to this task
46 * @task: the task sent to the LLDD
47 * @tag: the found tag associated with the task
48 */
49static int pm8001_find_tag(struct sas_task *task, u32 *tag)
50{
51 if (task->lldd_task) {
52 struct pm8001_ccb_info *ccb;
53 ccb = task->lldd_task;
54 *tag = ccb->ccb_tag;
55 return 1;
56 }
57 return 0;
58}
59
60/**
61 * pm8001_tag_clear - clear the tags bitmap
62 * @pm8001_ha: our hba struct
63 * @tag: the found tag associated with the task
64 */
65static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag)
66{
67 void *bitmap = pm8001_ha->tags;
68 clear_bit(tag, bitmap);
69}
70
71static void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
72{
73 pm8001_tag_clear(pm8001_ha, tag);
74}
75
76static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
77{
78 void *bitmap = pm8001_ha->tags;
79 set_bit(tag, bitmap);
80}
81
82/**
83 * pm8001_tag_alloc - allocate a empty tag for task used.
84 * @pm8001_ha: our hba struct
85 * @tag_out: the found empty tag .
86 */
87inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
88{
89 unsigned int index, tag;
90 void *bitmap = pm8001_ha->tags;
91
92 index = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
93 tag = index;
94 if (tag >= pm8001_ha->tags_num)
95 return -SAS_QUEUE_FULL;
96 pm8001_tag_set(pm8001_ha, tag);
97 *tag_out = tag;
98 return 0;
99}
100
101void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
102{
103 int i;
104 for (i = 0; i < pm8001_ha->tags_num; ++i)
105 pm8001_tag_clear(pm8001_ha, i);
106}
107
108 /**
109 * pm8001_mem_alloc - allocate memory for pm8001.
110 * @pdev: pci device.
111 * @virt_addr: the allocated virtual address
112 * @pphys_addr_hi: the physical address high byte address.
113 * @pphys_addr_lo: the physical address low byte address.
114 * @mem_size: memory size.
115 */
116int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
117 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
118 u32 *pphys_addr_lo, u32 mem_size, u32 align)
119{
120 caddr_t mem_virt_alloc;
121 dma_addr_t mem_dma_handle;
122 u64 phys_align;
123 u64 align_offset = 0;
124 if (align)
125 align_offset = (dma_addr_t)align - 1;
126 mem_virt_alloc =
127 pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
128 if (!mem_virt_alloc) {
129 pm8001_printk("memory allocation error\n");
130 return -1;
131 }
132 memset((void *)mem_virt_alloc, 0, mem_size+align);
133 *pphys_addr = mem_dma_handle;
134 phys_align = (*pphys_addr + align_offset) & ~align_offset;
135 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
136 *pphys_addr_hi = upper_32_bits(phys_align);
137 *pphys_addr_lo = lower_32_bits(phys_align);
138 return 0;
139}
140/**
141 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
142 * find out our hba struct.
143 * @dev: the domain device which from sas layer.
144 */
145static
146struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
147{
148 struct sas_ha_struct *sha = dev->port->ha;
149 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
150 return pm8001_ha;
151}
152
153/**
154 * pm8001_phy_control - this function should be registered to
155 * sas_domain_function_template to provide libsas used, note: this is just
156 * control the HBA phy rather than other expander phy if you want control
157 * other phy, you should use SMP command.
158 * @sas_phy: which phy in HBA phys.
159 * @func: the operation.
160 * @funcdata: always NULL.
161 */
162int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
163 void *funcdata)
164{
165 int rc = 0, phy_id = sas_phy->id;
166 struct pm8001_hba_info *pm8001_ha = NULL;
167 struct sas_phy_linkrates *rates;
168 DECLARE_COMPLETION_ONSTACK(completion);
169 pm8001_ha = sas_phy->ha->lldd_ha;
170 pm8001_ha->phy[phy_id].enable_completion = &completion;
171 switch (func) {
172 case PHY_FUNC_SET_LINK_RATE:
173 rates = funcdata;
174 if (rates->minimum_linkrate) {
175 pm8001_ha->phy[phy_id].minimum_linkrate =
176 rates->minimum_linkrate;
177 }
178 if (rates->maximum_linkrate) {
179 pm8001_ha->phy[phy_id].maximum_linkrate =
180 rates->maximum_linkrate;
181 }
182 if (pm8001_ha->phy[phy_id].phy_state == 0) {
183 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
184 wait_for_completion(&completion);
185 }
186 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
187 PHY_LINK_RESET);
188 break;
189 case PHY_FUNC_HARD_RESET:
190 if (pm8001_ha->phy[phy_id].phy_state == 0) {
191 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
192 wait_for_completion(&completion);
193 }
194 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
195 PHY_HARD_RESET);
196 break;
197 case PHY_FUNC_LINK_RESET:
198 if (pm8001_ha->phy[phy_id].phy_state == 0) {
199 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
200 wait_for_completion(&completion);
201 }
202 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
203 PHY_LINK_RESET);
204 break;
205 case PHY_FUNC_RELEASE_SPINUP_HOLD:
206 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
207 PHY_LINK_RESET);
208 break;
209 case PHY_FUNC_DISABLE:
210 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
211 break;
212 default:
213 rc = -EOPNOTSUPP;
214 }
215 msleep(300);
216 return rc;
217}
218
219int pm8001_slave_alloc(struct scsi_device *scsi_dev)
220{
221 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
222 if (dev_is_sata(dev)) {
223 /* We don't need to rescan targets
224 * if REPORT_LUNS request is failed
225 */
226 if (scsi_dev->lun > 0)
227 return -ENXIO;
228 scsi_dev->tagged_supported = 1;
229 }
230 return sas_slave_alloc(scsi_dev);
231}
232
233/**
234 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
235 * command to HBA.
236 * @shost: the scsi host data.
237 */
238void pm8001_scan_start(struct Scsi_Host *shost)
239{
240 int i;
241 struct pm8001_hba_info *pm8001_ha;
242 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
243 pm8001_ha = sha->lldd_ha;
244 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
245 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
246 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
247}
248
249int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
250{
251 /* give the phy enabling interrupt event time to come in (1s
252 * is empirically about all it takes) */
253 if (time < HZ)
254 return 0;
255 /* Wait for discovery to finish */
256 scsi_flush_work(shost);
257 return 1;
258}
259
260/**
261 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
262 * @pm8001_ha: our hba card information
263 * @ccb: the ccb which attached to smp task
264 */
265static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
266 struct pm8001_ccb_info *ccb)
267{
268 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
269}
270
271u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
272{
273 struct ata_queued_cmd *qc = task->uldd_task;
274 if (qc) {
275 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
276 qc->tf.command == ATA_CMD_FPDMA_READ) {
277 *tag = qc->tag;
278 return 1;
279 }
280 }
281 return 0;
282}
283
284/**
285 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
286 * @pm8001_ha: our hba card information
287 * @ccb: the ccb which attached to sata task
288 */
289static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
290 struct pm8001_ccb_info *ccb)
291{
292 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
293}
294
295/**
296 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
297 * @pm8001_ha: our hba card information
298 * @ccb: the ccb which attached to TM
299 * @tmf: the task management IU
300 */
301static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
302 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
303{
304 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
305}
306
307/**
308 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
309 * @pm8001_ha: our hba card information
310 * @ccb: the ccb which attached to ssp task
311 */
312static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
313 struct pm8001_ccb_info *ccb)
314{
315 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
316}
317int pm8001_slave_configure(struct scsi_device *sdev)
318{
319 struct domain_device *dev = sdev_to_domain_dev(sdev);
320 int ret = sas_slave_configure(sdev);
321 if (ret)
322 return ret;
323 if (dev_is_sata(dev)) {
324 #ifdef PM8001_DISABLE_NCQ
325 struct ata_port *ap = dev->sata_dev.ap;
326 struct ata_device *adev = ap->link.device;
327 adev->flags |= ATA_DFLAG_NCQ_OFF;
328 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1);
329 #endif
330 }
331 return 0;
332}
333 /* Find the local port id that's attached to this device */
334static int sas_find_local_port_id(struct domain_device *dev)
335{
336 struct domain_device *pdev = dev->parent;
337
338 /* Directly attached device */
339 if (!pdev)
340 return dev->port->id;
341 while (pdev) {
342 struct domain_device *pdev_p = pdev->parent;
343 if (!pdev_p)
344 return pdev->port->id;
345 pdev = pdev->parent;
346 }
347 return 0;
348}
349
350/**
351 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
352 * @task: the task to be execute.
353 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
354 * we always execute one one time.
355 * @gfp_flags: gfp_flags.
356 * @is_tmf: if it is task management task.
357 * @tmf: the task management IU
358 */
359#define DEV_IS_GONE(pm8001_dev) \
360 ((!pm8001_dev || (pm8001_dev->dev_type == NO_DEVICE)))
361static int pm8001_task_exec(struct sas_task *task, const int num,
362 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
363{
364 struct domain_device *dev = task->dev;
365 struct pm8001_hba_info *pm8001_ha;
366 struct pm8001_device *pm8001_dev;
367 struct pm8001_port *port = NULL;
368 struct sas_task *t = task;
369 struct pm8001_ccb_info *ccb;
370 u32 tag = 0xdeadbeef, rc, n_elem = 0;
371 u32 n = num;
372 unsigned long flags = 0, flags_libsas = 0;
373
374 if (!dev->port) {
375 struct task_status_struct *tsm = &t->task_status;
376 tsm->resp = SAS_TASK_UNDELIVERED;
377 tsm->stat = SAS_PHY_DOWN;
378 if (dev->dev_type != SATA_DEV)
379 t->task_done(t);
380 return 0;
381 }
382 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
383 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
384 spin_lock_irqsave(&pm8001_ha->lock, flags);
385 do {
386 dev = t->dev;
387 pm8001_dev = dev->lldd_dev;
388 if (DEV_IS_GONE(pm8001_dev)) {
389 if (pm8001_dev) {
390 PM8001_IO_DBG(pm8001_ha,
391 pm8001_printk("device %d not ready.\n",
392 pm8001_dev->device_id));
393 } else {
394 PM8001_IO_DBG(pm8001_ha,
395 pm8001_printk("device %016llx not "
396 "ready.\n", SAS_ADDR(dev->sas_addr)));
397 }
398 rc = SAS_PHY_DOWN;
399 goto out_done;
400 }
401 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
402 if (!port->port_attached) {
403 if (sas_protocol_ata(t->task_proto)) {
404 struct task_status_struct *ts = &t->task_status;
405 ts->resp = SAS_TASK_UNDELIVERED;
406 ts->stat = SAS_PHY_DOWN;
407
408 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
409 spin_unlock_irqrestore(dev->sata_dev.ap->lock,
410 flags_libsas);
411 t->task_done(t);
412 spin_lock_irqsave(dev->sata_dev.ap->lock,
413 flags_libsas);
414 spin_lock_irqsave(&pm8001_ha->lock, flags);
415 if (n > 1)
416 t = list_entry(t->list.next,
417 struct sas_task, list);
418 continue;
419 } else {
420 struct task_status_struct *ts = &t->task_status;
421 ts->resp = SAS_TASK_UNDELIVERED;
422 ts->stat = SAS_PHY_DOWN;
423 t->task_done(t);
424 if (n > 1)
425 t = list_entry(t->list.next,
426 struct sas_task, list);
427 continue;
428 }
429 }
430 rc = pm8001_tag_alloc(pm8001_ha, &tag);
431 if (rc)
432 goto err_out;
433 ccb = &pm8001_ha->ccb_info[tag];
434
435 if (!sas_protocol_ata(t->task_proto)) {
436 if (t->num_scatter) {
437 n_elem = dma_map_sg(pm8001_ha->dev,
438 t->scatter,
439 t->num_scatter,
440 t->data_dir);
441 if (!n_elem) {
442 rc = -ENOMEM;
443 goto err_out_tag;
444 }
445 }
446 } else {
447 n_elem = t->num_scatter;
448 }
449
450 t->lldd_task = ccb;
451 ccb->n_elem = n_elem;
452 ccb->ccb_tag = tag;
453 ccb->task = t;
454 switch (t->task_proto) {
455 case SAS_PROTOCOL_SMP:
456 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
457 break;
458 case SAS_PROTOCOL_SSP:
459 if (is_tmf)
460 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
461 ccb, tmf);
462 else
463 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
464 break;
465 case SAS_PROTOCOL_SATA:
466 case SAS_PROTOCOL_STP:
467 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
468 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
469 break;
470 default:
471 dev_printk(KERN_ERR, pm8001_ha->dev,
472 "unknown sas_task proto: 0x%x\n",
473 t->task_proto);
474 rc = -EINVAL;
475 break;
476 }
477
478 if (rc) {
479 PM8001_IO_DBG(pm8001_ha,
480 pm8001_printk("rc is %x\n", rc));
481 goto err_out_tag;
482 }
483 /* TODO: select normal or high priority */
484 spin_lock(&t->task_state_lock);
485 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
486 spin_unlock(&t->task_state_lock);
487 pm8001_dev->running_req++;
488 if (n > 1)
489 t = list_entry(t->list.next, struct sas_task, list);
490 } while (--n);
491 rc = 0;
492 goto out_done;
493
494err_out_tag:
495 pm8001_tag_free(pm8001_ha, tag);
496err_out:
497 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
498 if (!sas_protocol_ata(t->task_proto))
499 if (n_elem)
500 dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
501 t->data_dir);
502out_done:
503 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
504 return rc;
505}
506
507/**
508 * pm8001_queue_command - register for upper layer used, all IO commands sent
509 * to HBA are from this interface.
510 * @task: the task to be execute.
511 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
512 * we always execute one one time
513 * @gfp_flags: gfp_flags
514 */
515int pm8001_queue_command(struct sas_task *task, const int num,
516 gfp_t gfp_flags)
517{
518 return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
519}
520
521void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
522{
523 pm8001_tag_clear(pm8001_ha, ccb_idx);
524}
525
526/**
527 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
528 * @pm8001_ha: our hba card information
529 * @ccb: the ccb which attached to ssp task
530 * @task: the task to be free.
531 * @ccb_idx: ccb index.
532 */
533void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
534 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
535{
536 if (!ccb->task)
537 return;
538 if (!sas_protocol_ata(task->task_proto))
539 if (ccb->n_elem)
540 dma_unmap_sg(pm8001_ha->dev, task->scatter,
541 task->num_scatter, task->data_dir);
542
543 switch (task->task_proto) {
544 case SAS_PROTOCOL_SMP:
545 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
546 PCI_DMA_FROMDEVICE);
547 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
548 PCI_DMA_TODEVICE);
549 break;
550
551 case SAS_PROTOCOL_SATA:
552 case SAS_PROTOCOL_STP:
553 case SAS_PROTOCOL_SSP:
554 default:
555 /* do nothing */
556 break;
557 }
558 task->lldd_task = NULL;
559 ccb->task = NULL;
560 ccb->ccb_tag = 0xFFFFFFFF;
561 pm8001_ccb_free(pm8001_ha, ccb_idx);
562}
563
564 /**
565 * pm8001_alloc_dev - find a empty pm8001_device
566 * @pm8001_ha: our hba card information
567 */
568struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
569{
570 u32 dev;
571 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
572 if (pm8001_ha->devices[dev].dev_type == NO_DEVICE) {
573 pm8001_ha->devices[dev].id = dev;
574 return &pm8001_ha->devices[dev];
575 }
576 }
577 if (dev == PM8001_MAX_DEVICES) {
578 PM8001_FAIL_DBG(pm8001_ha,
579 pm8001_printk("max support %d devices, ignore ..\n",
580 PM8001_MAX_DEVICES));
581 }
582 return NULL;
583}
584
585static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
586{
587 u32 id = pm8001_dev->id;
588 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
589 pm8001_dev->id = id;
590 pm8001_dev->dev_type = NO_DEVICE;
591 pm8001_dev->device_id = PM8001_MAX_DEVICES;
592 pm8001_dev->sas_device = NULL;
593}
594
595/**
596 * pm8001_dev_found_notify - libsas notify a device is found.
597 * @dev: the device structure which sas layer used.
598 *
599 * when libsas find a sas domain device, it should tell the LLDD that
600 * device is found, and then LLDD register this device to HBA firmware
601 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
602 * device ID(according to device's sas address) and returned it to LLDD. From
603 * now on, we communicate with HBA FW with the device ID which HBA assigned
604 * rather than sas address. it is the necessary step for our HBA but it is
605 * the optional for other HBA driver.
606 */
607static int pm8001_dev_found_notify(struct domain_device *dev)
608{
609 unsigned long flags = 0;
610 int res = 0;
611 struct pm8001_hba_info *pm8001_ha = NULL;
612 struct domain_device *parent_dev = dev->parent;
613 struct pm8001_device *pm8001_device;
614 DECLARE_COMPLETION_ONSTACK(completion);
615 u32 flag = 0;
616 pm8001_ha = pm8001_find_ha_by_dev(dev);
617 spin_lock_irqsave(&pm8001_ha->lock, flags);
618
619 pm8001_device = pm8001_alloc_dev(pm8001_ha);
620 if (!pm8001_device) {
621 res = -1;
622 goto found_out;
623 }
624 pm8001_device->sas_device = dev;
625 dev->lldd_dev = pm8001_device;
626 pm8001_device->dev_type = dev->dev_type;
627 pm8001_device->dcompletion = &completion;
628 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
629 int phy_id;
630 struct ex_phy *phy;
631 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
632 phy_id++) {
633 phy = &parent_dev->ex_dev.ex_phy[phy_id];
634 if (SAS_ADDR(phy->attached_sas_addr)
635 == SAS_ADDR(dev->sas_addr)) {
636 pm8001_device->attached_phy = phy_id;
637 break;
638 }
639 }
640 if (phy_id == parent_dev->ex_dev.num_phys) {
641 PM8001_FAIL_DBG(pm8001_ha,
642 pm8001_printk("Error: no attached dev:%016llx"
643 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
644 SAS_ADDR(parent_dev->sas_addr)));
645 res = -1;
646 }
647 } else {
648 if (dev->dev_type == SATA_DEV) {
649 pm8001_device->attached_phy =
650 dev->rphy->identify.phy_identifier;
651 flag = 1; /* directly sata*/
652 }
653 } /*register this device to HBA*/
654 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device \n"));
655 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
656 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
657 wait_for_completion(&completion);
658 if (dev->dev_type == SAS_END_DEV)
659 msleep(50);
660 pm8001_ha->flags |= PM8001F_RUN_TIME ;
661 return 0;
662found_out:
663 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
664 return res;
665}
666
667int pm8001_dev_found(struct domain_device *dev)
668{
669 return pm8001_dev_found_notify(dev);
670}
671
672/**
673 * pm8001_alloc_task - allocate a task structure for TMF
674 */
675static struct sas_task *pm8001_alloc_task(void)
676{
677 struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL);
678 if (task) {
679 INIT_LIST_HEAD(&task->list);
680 spin_lock_init(&task->task_state_lock);
681 task->task_state_flags = SAS_TASK_STATE_PENDING;
682 init_timer(&task->timer);
683 init_completion(&task->completion);
684 }
685 return task;
686}
687
688static void pm8001_free_task(struct sas_task *task)
689{
690 if (task) {
691 BUG_ON(!list_empty(&task->list));
692 kfree(task);
693 }
694}
695
696static void pm8001_task_done(struct sas_task *task)
697{
698 if (!del_timer(&task->timer))
699 return;
700 complete(&task->completion);
701}
702
703static void pm8001_tmf_timedout(unsigned long data)
704{
705 struct sas_task *task = (struct sas_task *)data;
706
707 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
708 complete(&task->completion);
709}
710
711#define PM8001_TASK_TIMEOUT 20
712/**
713 * pm8001_exec_internal_tmf_task - execute some task management commands.
714 * @dev: the wanted device.
715 * @tmf: which task management wanted to be take.
716 * @para_len: para_len.
717 * @parameter: ssp task parameter.
718 *
719 * when errors or exception happened, we may want to do something, for example
720 * abort the issued task which result in this execption, it is done by calling
721 * this function, note it is also with the task execute interface.
722 */
723static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
724 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
725{
726 int res, retry;
727 struct sas_task *task = NULL;
728 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
729
730 for (retry = 0; retry < 3; retry++) {
731 task = pm8001_alloc_task();
732 if (!task)
733 return -ENOMEM;
734
735 task->dev = dev;
736 task->task_proto = dev->tproto;
737 memcpy(&task->ssp_task, parameter, para_len);
738 task->task_done = pm8001_task_done;
739 task->timer.data = (unsigned long)task;
740 task->timer.function = pm8001_tmf_timedout;
741 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
742 add_timer(&task->timer);
743
744 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
745
746 if (res) {
747 del_timer(&task->timer);
748 PM8001_FAIL_DBG(pm8001_ha,
749 pm8001_printk("Executing internal task "
750 "failed\n"));
751 goto ex_err;
752 }
753 wait_for_completion(&task->completion);
754 res = -TMF_RESP_FUNC_FAILED;
755 /* Even TMF timed out, return direct. */
756 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
757 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
758 PM8001_FAIL_DBG(pm8001_ha,
759 pm8001_printk("TMF task[%x]timeout.\n",
760 tmf->tmf));
761 goto ex_err;
762 }
763 }
764
765 if (task->task_status.resp == SAS_TASK_COMPLETE &&
766 task->task_status.stat == SAM_STAT_GOOD) {
767 res = TMF_RESP_FUNC_COMPLETE;
768 break;
769 }
770
771 if (task->task_status.resp == SAS_TASK_COMPLETE &&
772 task->task_status.stat == SAS_DATA_UNDERRUN) {
773 /* no error, but return the number of bytes of
774 * underrun */
775 res = task->task_status.residual;
776 break;
777 }
778
779 if (task->task_status.resp == SAS_TASK_COMPLETE &&
780 task->task_status.stat == SAS_DATA_OVERRUN) {
781 PM8001_FAIL_DBG(pm8001_ha,
782 pm8001_printk("Blocked task error.\n"));
783 res = -EMSGSIZE;
784 break;
785 } else {
786 PM8001_EH_DBG(pm8001_ha,
787 pm8001_printk(" Task to dev %016llx response:"
788 "0x%x status 0x%x\n",
789 SAS_ADDR(dev->sas_addr),
790 task->task_status.resp,
791 task->task_status.stat));
792 pm8001_free_task(task);
793 task = NULL;
794 }
795 }
796ex_err:
797 BUG_ON(retry == 3 && task != NULL);
798 if (task != NULL)
799 pm8001_free_task(task);
800 return res;
801}
802
803static int
804pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
805 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
806 u32 task_tag)
807{
808 int res, retry;
809 u32 ccb_tag;
810 struct pm8001_ccb_info *ccb;
811 struct sas_task *task = NULL;
812
813 for (retry = 0; retry < 3; retry++) {
814 task = pm8001_alloc_task();
815 if (!task)
816 return -ENOMEM;
817
818 task->dev = dev;
819 task->task_proto = dev->tproto;
820 task->task_done = pm8001_task_done;
821 task->timer.data = (unsigned long)task;
822 task->timer.function = pm8001_tmf_timedout;
823 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
824 add_timer(&task->timer);
825
826 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
827 if (res)
828 return res;
829 ccb = &pm8001_ha->ccb_info[ccb_tag];
830 ccb->device = pm8001_dev;
831 ccb->ccb_tag = ccb_tag;
832 ccb->task = task;
833
834 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
835 pm8001_dev, flag, task_tag, ccb_tag);
836
837 if (res) {
838 del_timer(&task->timer);
839 PM8001_FAIL_DBG(pm8001_ha,
840 pm8001_printk("Executing internal task "
841 "failed\n"));
842 goto ex_err;
843 }
844 wait_for_completion(&task->completion);
845 res = TMF_RESP_FUNC_FAILED;
846 /* Even TMF timed out, return direct. */
847 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
848 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
849 PM8001_FAIL_DBG(pm8001_ha,
850 pm8001_printk("TMF task timeout.\n"));
851 goto ex_err;
852 }
853 }
854
855 if (task->task_status.resp == SAS_TASK_COMPLETE &&
856 task->task_status.stat == SAM_STAT_GOOD) {
857 res = TMF_RESP_FUNC_COMPLETE;
858 break;
859
860 } else {
861 PM8001_EH_DBG(pm8001_ha,
862 pm8001_printk(" Task to dev %016llx response: "
863 "0x%x status 0x%x\n",
864 SAS_ADDR(dev->sas_addr),
865 task->task_status.resp,
866 task->task_status.stat));
867 pm8001_free_task(task);
868 task = NULL;
869 }
870 }
871ex_err:
872 BUG_ON(retry == 3 && task != NULL);
873 if (task != NULL)
874 pm8001_free_task(task);
875 return res;
876}
877
878/**
879 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
880 * @dev: the device structure which sas layer used.
881 */
882static void pm8001_dev_gone_notify(struct domain_device *dev)
883{
884 unsigned long flags = 0;
885 u32 tag;
886 struct pm8001_hba_info *pm8001_ha;
887 struct pm8001_device *pm8001_dev = dev->lldd_dev;
888
889 pm8001_ha = pm8001_find_ha_by_dev(dev);
890 spin_lock_irqsave(&pm8001_ha->lock, flags);
891 pm8001_tag_alloc(pm8001_ha, &tag);
892 if (pm8001_dev) {
893 u32 device_id = pm8001_dev->device_id;
894
895 PM8001_DISC_DBG(pm8001_ha,
896 pm8001_printk("found dev[%d:%x] is gone.\n",
897 pm8001_dev->device_id, pm8001_dev->dev_type));
898 if (pm8001_dev->running_req) {
899 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
900 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
901 dev, 1, 0);
902 spin_lock_irqsave(&pm8001_ha->lock, flags);
903 }
904 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
905 pm8001_free_dev(pm8001_dev);
906 } else {
907 PM8001_DISC_DBG(pm8001_ha,
908 pm8001_printk("Found dev has gone.\n"));
909 }
910 dev->lldd_dev = NULL;
911 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
912}
913
914void pm8001_dev_gone(struct domain_device *dev)
915{
916 pm8001_dev_gone_notify(dev);
917}
918
919static int pm8001_issue_ssp_tmf(struct domain_device *dev,
920 u8 *lun, struct pm8001_tmf_task *tmf)
921{
922 struct sas_ssp_task ssp_task;
923 if (!(dev->tproto & SAS_PROTOCOL_SSP))
924 return TMF_RESP_FUNC_ESUPP;
925
926 strncpy((u8 *)&ssp_task.LUN, lun, 8);
927 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
928 tmf);
929}
930
931/**
932 * Standard mandates link reset for ATA (type 0) and hard reset for
933 * SSP (type 1) , only for RECOVERY
934 */
935int pm8001_I_T_nexus_reset(struct domain_device *dev)
936{
937 int rc = TMF_RESP_FUNC_FAILED;
938 struct pm8001_device *pm8001_dev;
939 struct pm8001_hba_info *pm8001_ha;
940 struct sas_phy *phy;
941 if (!dev || !dev->lldd_dev)
942 return -1;
943
944 pm8001_dev = dev->lldd_dev;
945 pm8001_ha = pm8001_find_ha_by_dev(dev);
946 phy = sas_find_local_phy(dev);
947
948 if (dev_is_sata(dev)) {
949 DECLARE_COMPLETION_ONSTACK(completion_setstate);
950 if (scsi_is_sas_phy_local(phy))
951 return 0;
952 rc = sas_phy_reset(phy, 1);
953 msleep(2000);
954 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
955 dev, 1, 0);
956 pm8001_dev->setds_completion = &completion_setstate;
957 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
958 pm8001_dev, 0x01);
959 wait_for_completion(&completion_setstate);
960 } else{
961 rc = sas_phy_reset(phy, 1);
962 msleep(2000);
963 }
964 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
965 pm8001_dev->device_id, rc));
966 return rc;
967}
968
969/* mandatory SAM-3, the task reset the specified LUN*/
970int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
971{
972 int rc = TMF_RESP_FUNC_FAILED;
973 struct pm8001_tmf_task tmf_task;
974 struct pm8001_device *pm8001_dev = dev->lldd_dev;
975 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
976 if (dev_is_sata(dev)) {
977 struct sas_phy *phy = sas_find_local_phy(dev);
978 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
979 dev, 1, 0);
980 rc = sas_phy_reset(phy, 1);
981 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
982 pm8001_dev, 0x01);
983 msleep(2000);
984 } else {
985 tmf_task.tmf = TMF_LU_RESET;
986 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
987 }
988 /* If failed, fall-through I_T_Nexus reset */
989 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
990 pm8001_dev->device_id, rc));
991 return rc;
992}
993
994/* optional SAM-3 */
995int pm8001_query_task(struct sas_task *task)
996{
997 u32 tag = 0xdeadbeef;
998 int i = 0;
999 struct scsi_lun lun;
1000 struct pm8001_tmf_task tmf_task;
1001 int rc = TMF_RESP_FUNC_FAILED;
1002 if (unlikely(!task || !task->lldd_task || !task->dev))
1003 return rc;
1004
1005 if (task->task_proto & SAS_PROTOCOL_SSP) {
1006 struct scsi_cmnd *cmnd = task->uldd_task;
1007 struct domain_device *dev = task->dev;
1008 struct pm8001_hba_info *pm8001_ha =
1009 pm8001_find_ha_by_dev(dev);
1010
1011 int_to_scsilun(cmnd->device->lun, &lun);
1012 rc = pm8001_find_tag(task, &tag);
1013 if (rc == 0) {
1014 rc = TMF_RESP_FUNC_FAILED;
1015 return rc;
1016 }
1017 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1018 for (i = 0; i < 16; i++)
1019 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1020 printk(KERN_INFO "]\n");
1021 tmf_task.tmf = TMF_QUERY_TASK;
1022 tmf_task.tag_of_task_to_be_managed = tag;
1023
1024 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1025 switch (rc) {
1026 /* The task is still in Lun, release it then */
1027 case TMF_RESP_FUNC_SUCC:
1028 PM8001_EH_DBG(pm8001_ha,
1029 pm8001_printk("The task is still in Lun \n"));
1030 /* The task is not in Lun or failed, reset the phy */
1031 case TMF_RESP_FUNC_FAILED:
1032 case TMF_RESP_FUNC_COMPLETE:
1033 PM8001_EH_DBG(pm8001_ha,
1034 pm8001_printk("The task is not in Lun or failed,"
1035 " reset the phy \n"));
1036 break;
1037 }
1038 }
1039 pm8001_printk(":rc= %d\n", rc);
1040 return rc;
1041}
1042
1043/* mandatory SAM-3, still need free task/ccb info, abord the specified task */
1044int pm8001_abort_task(struct sas_task *task)
1045{
1046 unsigned long flags;
1047 u32 tag = 0xdeadbeef;
1048 u32 device_id;
1049 struct domain_device *dev ;
1050 struct pm8001_hba_info *pm8001_ha = NULL;
1051 struct pm8001_ccb_info *ccb;
1052 struct scsi_lun lun;
1053 struct pm8001_device *pm8001_dev;
1054 struct pm8001_tmf_task tmf_task;
1055 int rc = TMF_RESP_FUNC_FAILED;
1056 if (unlikely(!task || !task->lldd_task || !task->dev))
1057 return rc;
1058 spin_lock_irqsave(&task->task_state_lock, flags);
1059 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1060 spin_unlock_irqrestore(&task->task_state_lock, flags);
1061 rc = TMF_RESP_FUNC_COMPLETE;
1062 goto out;
1063 }
1064 spin_unlock_irqrestore(&task->task_state_lock, flags);
1065 if (task->task_proto & SAS_PROTOCOL_SSP) {
1066 struct scsi_cmnd *cmnd = task->uldd_task;
1067 dev = task->dev;
1068 ccb = task->lldd_task;
1069 pm8001_dev = dev->lldd_dev;
1070 pm8001_ha = pm8001_find_ha_by_dev(dev);
1071 int_to_scsilun(cmnd->device->lun, &lun);
1072 rc = pm8001_find_tag(task, &tag);
1073 if (rc == 0) {
1074 printk(KERN_INFO "No such tag in %s\n", __func__);
1075 rc = TMF_RESP_FUNC_FAILED;
1076 return rc;
1077 }
1078 device_id = pm8001_dev->device_id;
1079 PM8001_EH_DBG(pm8001_ha,
1080 pm8001_printk("abort io to deviceid= %d\n", device_id));
1081 tmf_task.tmf = TMF_ABORT_TASK;
1082 tmf_task.tag_of_task_to_be_managed = tag;
1083 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1084 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1085 pm8001_dev->sas_device, 0, tag);
1086 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1087 task->task_proto & SAS_PROTOCOL_STP) {
1088 dev = task->dev;
1089 pm8001_dev = dev->lldd_dev;
1090 pm8001_ha = pm8001_find_ha_by_dev(dev);
1091 rc = pm8001_find_tag(task, &tag);
1092 if (rc == 0) {
1093 printk(KERN_INFO "No such tag in %s\n", __func__);
1094 rc = TMF_RESP_FUNC_FAILED;
1095 return rc;
1096 }
1097 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1098 pm8001_dev->sas_device, 0, tag);
1099 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1100 /* SMP */
1101 dev = task->dev;
1102 pm8001_dev = dev->lldd_dev;
1103 pm8001_ha = pm8001_find_ha_by_dev(dev);
1104 rc = pm8001_find_tag(task, &tag);
1105 if (rc == 0) {
1106 printk(KERN_INFO "No such tag in %s\n", __func__);
1107 rc = TMF_RESP_FUNC_FAILED;
1108 return rc;
1109 }
1110 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1111 pm8001_dev->sas_device, 0, tag);
1112
1113 }
1114out:
1115 if (rc != TMF_RESP_FUNC_COMPLETE)
1116 pm8001_printk("rc= %d\n", rc);
1117 return rc;
1118}
1119
1120int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1121{
1122 int rc = TMF_RESP_FUNC_FAILED;
1123 struct pm8001_tmf_task tmf_task;
1124
1125 tmf_task.tmf = TMF_ABORT_TASK_SET;
1126 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1127 return rc;
1128}
1129
1130int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1131{
1132 int rc = TMF_RESP_FUNC_FAILED;
1133 struct pm8001_tmf_task tmf_task;
1134
1135 tmf_task.tmf = TMF_CLEAR_ACA;
1136 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1137
1138 return rc;
1139}
1140
1141int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1142{
1143 int rc = TMF_RESP_FUNC_FAILED;
1144 struct pm8001_tmf_task tmf_task;
1145 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1146 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1147
1148 PM8001_EH_DBG(pm8001_ha,
1149 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1150 pm8001_dev->device_id));
1151 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1152 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1153 return rc;
1154}
1155
1/*
2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
3 *
4 * Copyright (c) 2008-2009 USI Co., Ltd.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
15 * ("Disclaimer") and any redistribution must be conditioned upon
16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
18 * 3. Neither the names of the above-listed copyright holders nor the names
19 * of any contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * Alternatively, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2 as published by the Free
24 * Software Foundation.
25 *
26 * NO WARRANTY
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGES.
38 *
39 */
40
41#include <linux/slab.h>
42#include "pm8001_sas.h"
43#include "pm80xx_tracepoints.h"
44
45/**
46 * pm8001_find_tag - from sas task to find out tag that belongs to this task
47 * @task: the task sent to the LLDD
48 * @tag: the found tag associated with the task
49 */
50static int pm8001_find_tag(struct sas_task *task, u32 *tag)
51{
52 if (task->lldd_task) {
53 struct pm8001_ccb_info *ccb;
54 ccb = task->lldd_task;
55 *tag = ccb->ccb_tag;
56 return 1;
57 }
58 return 0;
59}
60
61/**
62 * pm8001_tag_free - free the no more needed tag
63 * @pm8001_ha: our hba struct
64 * @tag: the found tag associated with the task
65 */
66void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
67{
68 void *bitmap = pm8001_ha->rsvd_tags;
69 unsigned long flags;
70
71 if (tag >= PM8001_RESERVE_SLOT)
72 return;
73
74 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
75 __clear_bit(tag, bitmap);
76 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
77}
78
79/**
80 * pm8001_tag_alloc - allocate a empty tag for task used.
81 * @pm8001_ha: our hba struct
82 * @tag_out: the found empty tag .
83 */
84int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
85{
86 void *bitmap = pm8001_ha->rsvd_tags;
87 unsigned long flags;
88 unsigned int tag;
89
90 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
91 tag = find_first_zero_bit(bitmap, PM8001_RESERVE_SLOT);
92 if (tag >= PM8001_RESERVE_SLOT) {
93 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
94 return -SAS_QUEUE_FULL;
95 }
96 __set_bit(tag, bitmap);
97 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
98
99 /* reserved tags are in the lower region of the tagset */
100 *tag_out = tag;
101 return 0;
102}
103
104/**
105 * pm8001_mem_alloc - allocate memory for pm8001.
106 * @pdev: pci device.
107 * @virt_addr: the allocated virtual address
108 * @pphys_addr: DMA address for this device
109 * @pphys_addr_hi: the physical address high byte address.
110 * @pphys_addr_lo: the physical address low byte address.
111 * @mem_size: memory size.
112 * @align: requested byte alignment
113 */
114int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
115 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
116 u32 *pphys_addr_lo, u32 mem_size, u32 align)
117{
118 caddr_t mem_virt_alloc;
119 dma_addr_t mem_dma_handle;
120 u64 phys_align;
121 u64 align_offset = 0;
122 if (align)
123 align_offset = (dma_addr_t)align - 1;
124 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
125 &mem_dma_handle, GFP_KERNEL);
126 if (!mem_virt_alloc)
127 return -ENOMEM;
128 *pphys_addr = mem_dma_handle;
129 phys_align = (*pphys_addr + align_offset) & ~align_offset;
130 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
131 *pphys_addr_hi = upper_32_bits(phys_align);
132 *pphys_addr_lo = lower_32_bits(phys_align);
133 return 0;
134}
135
136/**
137 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
138 * find out our hba struct.
139 * @dev: the domain device which from sas layer.
140 */
141static
142struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
143{
144 struct sas_ha_struct *sha = dev->port->ha;
145 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
146 return pm8001_ha;
147}
148
149/**
150 * pm8001_phy_control - this function should be registered to
151 * sas_domain_function_template to provide libsas used, note: this is just
152 * control the HBA phy rather than other expander phy if you want control
153 * other phy, you should use SMP command.
154 * @sas_phy: which phy in HBA phys.
155 * @func: the operation.
156 * @funcdata: always NULL.
157 */
158int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
159 void *funcdata)
160{
161 int rc = 0, phy_id = sas_phy->id;
162 struct pm8001_hba_info *pm8001_ha = NULL;
163 struct sas_phy_linkrates *rates;
164 struct pm8001_phy *phy;
165 DECLARE_COMPLETION_ONSTACK(completion);
166 unsigned long flags;
167 pm8001_ha = sas_phy->ha->lldd_ha;
168 phy = &pm8001_ha->phy[phy_id];
169
170 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
171 /*
172 * If the controller is in fatal error state,
173 * we will not get a response from the controller
174 */
175 pm8001_dbg(pm8001_ha, FAIL,
176 "Phy control failed due to fatal errors\n");
177 return -EFAULT;
178 }
179
180 switch (func) {
181 case PHY_FUNC_SET_LINK_RATE:
182 rates = funcdata;
183 if (rates->minimum_linkrate) {
184 pm8001_ha->phy[phy_id].minimum_linkrate =
185 rates->minimum_linkrate;
186 }
187 if (rates->maximum_linkrate) {
188 pm8001_ha->phy[phy_id].maximum_linkrate =
189 rates->maximum_linkrate;
190 }
191 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
192 pm8001_ha->phy[phy_id].enable_completion = &completion;
193 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
194 wait_for_completion(&completion);
195 }
196 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
197 PHY_LINK_RESET);
198 break;
199 case PHY_FUNC_HARD_RESET:
200 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
201 pm8001_ha->phy[phy_id].enable_completion = &completion;
202 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
203 wait_for_completion(&completion);
204 }
205 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
206 PHY_HARD_RESET);
207 break;
208 case PHY_FUNC_LINK_RESET:
209 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
210 pm8001_ha->phy[phy_id].enable_completion = &completion;
211 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
212 wait_for_completion(&completion);
213 }
214 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
215 PHY_LINK_RESET);
216 break;
217 case PHY_FUNC_RELEASE_SPINUP_HOLD:
218 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
219 PHY_LINK_RESET);
220 break;
221 case PHY_FUNC_DISABLE:
222 if (pm8001_ha->chip_id != chip_8001) {
223 if (pm8001_ha->phy[phy_id].phy_state ==
224 PHY_STATE_LINK_UP_SPCV) {
225 sas_phy_disconnected(&phy->sas_phy);
226 sas_notify_phy_event(&phy->sas_phy,
227 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
228 phy->phy_attached = 0;
229 }
230 } else {
231 if (pm8001_ha->phy[phy_id].phy_state ==
232 PHY_STATE_LINK_UP_SPC) {
233 sas_phy_disconnected(&phy->sas_phy);
234 sas_notify_phy_event(&phy->sas_phy,
235 PHYE_LOSS_OF_SIGNAL, GFP_KERNEL);
236 phy->phy_attached = 0;
237 }
238 }
239 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
240 break;
241 case PHY_FUNC_GET_EVENTS:
242 spin_lock_irqsave(&pm8001_ha->lock, flags);
243 if (pm8001_ha->chip_id == chip_8001) {
244 if (-1 == pm8001_bar4_shift(pm8001_ha,
245 (phy_id < 4) ? 0x30000 : 0x40000)) {
246 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
247 return -EINVAL;
248 }
249 }
250 {
251 struct sas_phy *phy = sas_phy->phy;
252 u32 __iomem *qp = pm8001_ha->io_mem[2].memvirtaddr
253 + 0x1034 + (0x4000 * (phy_id & 3));
254
255 phy->invalid_dword_count = readl(qp);
256 phy->running_disparity_error_count = readl(&qp[1]);
257 phy->loss_of_dword_sync_count = readl(&qp[3]);
258 phy->phy_reset_problem_count = readl(&qp[4]);
259 }
260 if (pm8001_ha->chip_id == chip_8001)
261 pm8001_bar4_shift(pm8001_ha, 0);
262 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
263 return 0;
264 default:
265 pm8001_dbg(pm8001_ha, DEVIO, "func 0x%x\n", func);
266 rc = -EOPNOTSUPP;
267 }
268 msleep(300);
269 return rc;
270}
271
272/**
273 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
274 * command to HBA.
275 * @shost: the scsi host data.
276 */
277void pm8001_scan_start(struct Scsi_Host *shost)
278{
279 int i;
280 struct pm8001_hba_info *pm8001_ha;
281 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
282 DECLARE_COMPLETION_ONSTACK(completion);
283 pm8001_ha = sha->lldd_ha;
284 /* SAS_RE_INITIALIZATION not available in SPCv/ve */
285 if (pm8001_ha->chip_id == chip_8001)
286 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
287 for (i = 0; i < pm8001_ha->chip->n_phy; ++i) {
288 pm8001_ha->phy[i].enable_completion = &completion;
289 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
290 wait_for_completion(&completion);
291 msleep(300);
292 }
293}
294
295int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
296{
297 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
298
299 /* give the phy enabling interrupt event time to come in (1s
300 * is empirically about all it takes) */
301 if (time < HZ)
302 return 0;
303 /* Wait for discovery to finish */
304 sas_drain_work(ha);
305 return 1;
306}
307
308/**
309 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
310 * @pm8001_ha: our hba card information
311 * @ccb: the ccb which attached to smp task
312 */
313static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
314 struct pm8001_ccb_info *ccb)
315{
316 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
317}
318
319u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
320{
321 struct ata_queued_cmd *qc = task->uldd_task;
322
323 if (qc && ata_is_ncq(qc->tf.protocol)) {
324 *tag = qc->tag;
325 return 1;
326 }
327
328 return 0;
329}
330
331/**
332 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
333 * @pm8001_ha: our hba card information
334 * @ccb: the ccb which attached to sata task
335 */
336static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
337 struct pm8001_ccb_info *ccb)
338{
339 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
340}
341
342/**
343 * pm8001_task_prep_internal_abort - the dispatcher function, prepare data
344 * for internal abort task
345 * @pm8001_ha: our hba card information
346 * @ccb: the ccb which attached to sata task
347 */
348static int pm8001_task_prep_internal_abort(struct pm8001_hba_info *pm8001_ha,
349 struct pm8001_ccb_info *ccb)
350{
351 return PM8001_CHIP_DISP->task_abort(pm8001_ha, ccb);
352}
353
354/**
355 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
356 * @pm8001_ha: our hba card information
357 * @ccb: the ccb which attached to TM
358 * @tmf: the task management IU
359 */
360static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
361 struct pm8001_ccb_info *ccb, struct sas_tmf_task *tmf)
362{
363 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
364}
365
366/**
367 * pm8001_task_prep_ssp - the dispatcher function, prepare ssp data for ssp task
368 * @pm8001_ha: our hba card information
369 * @ccb: the ccb which attached to ssp task
370 */
371static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
372 struct pm8001_ccb_info *ccb)
373{
374 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
375}
376
377 /* Find the local port id that's attached to this device */
378static int sas_find_local_port_id(struct domain_device *dev)
379{
380 struct domain_device *pdev = dev->parent;
381
382 /* Directly attached device */
383 if (!pdev)
384 return dev->port->id;
385 while (pdev) {
386 struct domain_device *pdev_p = pdev->parent;
387 if (!pdev_p)
388 return pdev->port->id;
389 pdev = pdev->parent;
390 }
391 return 0;
392}
393
394#define DEV_IS_GONE(pm8001_dev) \
395 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
396
397
398static int pm8001_deliver_command(struct pm8001_hba_info *pm8001_ha,
399 struct pm8001_ccb_info *ccb)
400{
401 struct sas_task *task = ccb->task;
402 enum sas_protocol task_proto = task->task_proto;
403 struct sas_tmf_task *tmf = task->tmf;
404 int is_tmf = !!tmf;
405
406 switch (task_proto) {
407 case SAS_PROTOCOL_SMP:
408 return pm8001_task_prep_smp(pm8001_ha, ccb);
409 case SAS_PROTOCOL_SSP:
410 if (is_tmf)
411 return pm8001_task_prep_ssp_tm(pm8001_ha, ccb, tmf);
412 return pm8001_task_prep_ssp(pm8001_ha, ccb);
413 case SAS_PROTOCOL_SATA:
414 case SAS_PROTOCOL_STP:
415 return pm8001_task_prep_ata(pm8001_ha, ccb);
416 case SAS_PROTOCOL_INTERNAL_ABORT:
417 return pm8001_task_prep_internal_abort(pm8001_ha, ccb);
418 default:
419 dev_err(pm8001_ha->dev, "unknown sas_task proto: 0x%x\n",
420 task_proto);
421 }
422
423 return -EINVAL;
424}
425
426/**
427 * pm8001_queue_command - register for upper layer used, all IO commands sent
428 * to HBA are from this interface.
429 * @task: the task to be execute.
430 * @gfp_flags: gfp_flags
431 */
432int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
433{
434 struct task_status_struct *ts = &task->task_status;
435 enum sas_protocol task_proto = task->task_proto;
436 struct domain_device *dev = task->dev;
437 struct pm8001_device *pm8001_dev = dev->lldd_dev;
438 bool internal_abort = sas_is_internal_abort(task);
439 struct pm8001_hba_info *pm8001_ha;
440 struct pm8001_port *port = NULL;
441 struct pm8001_ccb_info *ccb;
442 unsigned long flags;
443 u32 n_elem = 0;
444 int rc = 0;
445
446 if (!internal_abort && !dev->port) {
447 ts->resp = SAS_TASK_UNDELIVERED;
448 ts->stat = SAS_PHY_DOWN;
449 if (dev->dev_type != SAS_SATA_DEV)
450 task->task_done(task);
451 return 0;
452 }
453
454 pm8001_ha = pm8001_find_ha_by_dev(dev);
455 if (pm8001_ha->controller_fatal_error) {
456 ts->resp = SAS_TASK_UNDELIVERED;
457 task->task_done(task);
458 return 0;
459 }
460
461 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec device\n");
462
463 spin_lock_irqsave(&pm8001_ha->lock, flags);
464
465 pm8001_dev = dev->lldd_dev;
466 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
467
468 if (!internal_abort &&
469 (DEV_IS_GONE(pm8001_dev) || !port->port_attached)) {
470 ts->resp = SAS_TASK_UNDELIVERED;
471 ts->stat = SAS_PHY_DOWN;
472 if (sas_protocol_ata(task_proto)) {
473 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
474 task->task_done(task);
475 spin_lock_irqsave(&pm8001_ha->lock, flags);
476 } else {
477 task->task_done(task);
478 }
479 rc = -ENODEV;
480 goto err_out;
481 }
482
483 ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_dev, task);
484 if (!ccb) {
485 rc = -SAS_QUEUE_FULL;
486 goto err_out;
487 }
488
489 if (!sas_protocol_ata(task_proto)) {
490 if (task->num_scatter) {
491 n_elem = dma_map_sg(pm8001_ha->dev, task->scatter,
492 task->num_scatter, task->data_dir);
493 if (!n_elem) {
494 rc = -ENOMEM;
495 goto err_out_ccb;
496 }
497 }
498 } else {
499 n_elem = task->num_scatter;
500 }
501
502 task->lldd_task = ccb;
503 ccb->n_elem = n_elem;
504
505 atomic_inc(&pm8001_dev->running_req);
506
507 rc = pm8001_deliver_command(pm8001_ha, ccb);
508 if (rc) {
509 atomic_dec(&pm8001_dev->running_req);
510 if (!sas_protocol_ata(task_proto) && n_elem)
511 dma_unmap_sg(pm8001_ha->dev, task->scatter,
512 task->num_scatter, task->data_dir);
513err_out_ccb:
514 pm8001_ccb_free(pm8001_ha, ccb);
515
516err_out:
517 pm8001_dbg(pm8001_ha, IO, "pm8001_task_exec failed[%d]!\n", rc);
518 }
519
520 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
521
522 return rc;
523}
524
525/**
526 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
527 * @pm8001_ha: our hba card information
528 * @ccb: the ccb which attached to ssp task to free
529 */
530void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
531 struct pm8001_ccb_info *ccb)
532{
533 struct sas_task *task = ccb->task;
534 struct ata_queued_cmd *qc;
535 struct pm8001_device *pm8001_dev;
536
537 if (!task)
538 return;
539
540 if (!sas_protocol_ata(task->task_proto) && ccb->n_elem)
541 dma_unmap_sg(pm8001_ha->dev, task->scatter,
542 task->num_scatter, task->data_dir);
543
544 switch (task->task_proto) {
545 case SAS_PROTOCOL_SMP:
546 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
547 DMA_FROM_DEVICE);
548 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
549 DMA_TO_DEVICE);
550 break;
551
552 case SAS_PROTOCOL_SATA:
553 case SAS_PROTOCOL_STP:
554 case SAS_PROTOCOL_SSP:
555 default:
556 /* do nothing */
557 break;
558 }
559
560 if (sas_protocol_ata(task->task_proto)) {
561 /* For SCSI/ATA commands uldd_task points to ata_queued_cmd */
562 qc = task->uldd_task;
563 pm8001_dev = ccb->device;
564 trace_pm80xx_request_complete(pm8001_ha->id,
565 pm8001_dev ? pm8001_dev->attached_phy : PM8001_MAX_PHYS,
566 ccb->ccb_tag, 0 /* ctlr_opcode not known */,
567 qc ? qc->tf.command : 0, // ata opcode
568 pm8001_dev ? atomic_read(&pm8001_dev->running_req) : -1);
569 }
570
571 task->lldd_task = NULL;
572 pm8001_ccb_free(pm8001_ha, ccb);
573}
574
575static void pm8001_init_dev(struct pm8001_device *pm8001_dev, int id)
576{
577 pm8001_dev->id = id;
578 pm8001_dev->device_id = PM8001_MAX_DEVICES;
579 atomic_set(&pm8001_dev->running_req, 0);
580}
581
582/**
583 * pm8001_alloc_dev - find a empty pm8001_device
584 * @pm8001_ha: our hba card information
585 */
586static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
587{
588 u32 dev;
589 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
590 struct pm8001_device *pm8001_dev = &pm8001_ha->devices[dev];
591
592 if (pm8001_dev->dev_type == SAS_PHY_UNUSED) {
593 pm8001_init_dev(pm8001_dev, dev);
594 return pm8001_dev;
595 }
596 }
597 if (dev == PM8001_MAX_DEVICES) {
598 pm8001_dbg(pm8001_ha, FAIL,
599 "max support %d devices, ignore ..\n",
600 PM8001_MAX_DEVICES);
601 }
602 return NULL;
603}
604/**
605 * pm8001_find_dev - find a matching pm8001_device
606 * @pm8001_ha: our hba card information
607 * @device_id: device ID to match against
608 */
609struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
610 u32 device_id)
611{
612 u32 dev;
613 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
614 if (pm8001_ha->devices[dev].device_id == device_id)
615 return &pm8001_ha->devices[dev];
616 }
617 if (dev == PM8001_MAX_DEVICES) {
618 pm8001_dbg(pm8001_ha, FAIL, "NO MATCHING DEVICE FOUND !!!\n");
619 }
620 return NULL;
621}
622
623void pm8001_free_dev(struct pm8001_device *pm8001_dev)
624{
625 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
626 pm8001_dev->dev_type = SAS_PHY_UNUSED;
627 pm8001_dev->device_id = PM8001_MAX_DEVICES;
628 pm8001_dev->sas_device = NULL;
629}
630
631/**
632 * pm8001_dev_found_notify - libsas notify a device is found.
633 * @dev: the device structure which sas layer used.
634 *
635 * when libsas find a sas domain device, it should tell the LLDD that
636 * device is found, and then LLDD register this device to HBA firmware
637 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
638 * device ID(according to device's sas address) and returned it to LLDD. From
639 * now on, we communicate with HBA FW with the device ID which HBA assigned
640 * rather than sas address. it is the necessary step for our HBA but it is
641 * the optional for other HBA driver.
642 */
643static int pm8001_dev_found_notify(struct domain_device *dev)
644{
645 unsigned long flags = 0;
646 int res = 0;
647 struct pm8001_hba_info *pm8001_ha = NULL;
648 struct domain_device *parent_dev = dev->parent;
649 struct pm8001_device *pm8001_device;
650 DECLARE_COMPLETION_ONSTACK(completion);
651 u32 flag = 0;
652 pm8001_ha = pm8001_find_ha_by_dev(dev);
653 spin_lock_irqsave(&pm8001_ha->lock, flags);
654
655 pm8001_device = pm8001_alloc_dev(pm8001_ha);
656 if (!pm8001_device) {
657 res = -1;
658 goto found_out;
659 }
660 pm8001_device->sas_device = dev;
661 dev->lldd_dev = pm8001_device;
662 pm8001_device->dev_type = dev->dev_type;
663 pm8001_device->dcompletion = &completion;
664 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
665 int phy_id;
666
667 phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
668 if (phy_id < 0) {
669 pm8001_dbg(pm8001_ha, FAIL,
670 "Error: no attached dev:%016llx at ex:%016llx.\n",
671 SAS_ADDR(dev->sas_addr),
672 SAS_ADDR(parent_dev->sas_addr));
673 res = phy_id;
674 } else {
675 pm8001_device->attached_phy = phy_id;
676 }
677 } else {
678 if (dev->dev_type == SAS_SATA_DEV) {
679 pm8001_device->attached_phy =
680 dev->rphy->identify.phy_identifier;
681 flag = 1; /* directly sata */
682 }
683 } /*register this device to HBA*/
684 pm8001_dbg(pm8001_ha, DISC, "Found device\n");
685 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
686 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
687 wait_for_completion(&completion);
688 if (dev->dev_type == SAS_END_DEVICE)
689 msleep(50);
690 pm8001_ha->flags = PM8001F_RUN_TIME;
691 return 0;
692found_out:
693 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
694 return res;
695}
696
697int pm8001_dev_found(struct domain_device *dev)
698{
699 return pm8001_dev_found_notify(dev);
700}
701
702#define PM8001_TASK_TIMEOUT 20
703
704/**
705 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
706 * @dev: the device structure which sas layer used.
707 */
708static void pm8001_dev_gone_notify(struct domain_device *dev)
709{
710 unsigned long flags = 0;
711 struct pm8001_hba_info *pm8001_ha;
712 struct pm8001_device *pm8001_dev = dev->lldd_dev;
713
714 pm8001_ha = pm8001_find_ha_by_dev(dev);
715 spin_lock_irqsave(&pm8001_ha->lock, flags);
716 if (pm8001_dev) {
717 u32 device_id = pm8001_dev->device_id;
718
719 pm8001_dbg(pm8001_ha, DISC, "found dev[%d:%x] is gone.\n",
720 pm8001_dev->device_id, pm8001_dev->dev_type);
721 if (atomic_read(&pm8001_dev->running_req)) {
722 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
723 sas_execute_internal_abort_dev(dev, 0, NULL);
724 while (atomic_read(&pm8001_dev->running_req))
725 msleep(20);
726 spin_lock_irqsave(&pm8001_ha->lock, flags);
727 }
728 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
729 pm8001_free_dev(pm8001_dev);
730 } else {
731 pm8001_dbg(pm8001_ha, DISC, "Found dev has gone.\n");
732 }
733 dev->lldd_dev = NULL;
734 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
735}
736
737void pm8001_dev_gone(struct domain_device *dev)
738{
739 pm8001_dev_gone_notify(dev);
740}
741
742/* retry commands by ha, by task and/or by device */
743void pm8001_open_reject_retry(
744 struct pm8001_hba_info *pm8001_ha,
745 struct sas_task *task_to_close,
746 struct pm8001_device *device_to_close)
747{
748 int i;
749 unsigned long flags;
750
751 if (pm8001_ha == NULL)
752 return;
753
754 spin_lock_irqsave(&pm8001_ha->lock, flags);
755
756 for (i = 0; i < PM8001_MAX_CCB; i++) {
757 struct sas_task *task;
758 struct task_status_struct *ts;
759 struct pm8001_device *pm8001_dev;
760 unsigned long flags1;
761 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
762
763 if (ccb->ccb_tag == PM8001_INVALID_TAG)
764 continue;
765
766 pm8001_dev = ccb->device;
767 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
768 continue;
769 if (!device_to_close) {
770 uintptr_t d = (uintptr_t)pm8001_dev
771 - (uintptr_t)&pm8001_ha->devices;
772 if (((d % sizeof(*pm8001_dev)) != 0)
773 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
774 continue;
775 } else if (pm8001_dev != device_to_close)
776 continue;
777 task = ccb->task;
778 if (!task || !task->task_done)
779 continue;
780 if (task_to_close && (task != task_to_close))
781 continue;
782 ts = &task->task_status;
783 ts->resp = SAS_TASK_COMPLETE;
784 /* Force the midlayer to retry */
785 ts->stat = SAS_OPEN_REJECT;
786 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
787 if (pm8001_dev)
788 atomic_dec(&pm8001_dev->running_req);
789 spin_lock_irqsave(&task->task_state_lock, flags1);
790 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
791 task->task_state_flags |= SAS_TASK_STATE_DONE;
792 if (unlikely((task->task_state_flags
793 & SAS_TASK_STATE_ABORTED))) {
794 spin_unlock_irqrestore(&task->task_state_lock,
795 flags1);
796 pm8001_ccb_task_free(pm8001_ha, ccb);
797 } else {
798 spin_unlock_irqrestore(&task->task_state_lock,
799 flags1);
800 pm8001_ccb_task_free(pm8001_ha, ccb);
801 mb();/* in order to force CPU ordering */
802 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
803 task->task_done(task);
804 spin_lock_irqsave(&pm8001_ha->lock, flags);
805 }
806 }
807
808 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
809}
810
811/**
812 * pm8001_I_T_nexus_reset() - reset the initiator/target connection
813 * @dev: the device structure for the device to reset.
814 *
815 * Standard mandates link reset for ATA (type 0) and hard reset for
816 * SSP (type 1), only for RECOVERY
817 */
818int pm8001_I_T_nexus_reset(struct domain_device *dev)
819{
820 int rc = TMF_RESP_FUNC_FAILED;
821 struct pm8001_device *pm8001_dev;
822 struct pm8001_hba_info *pm8001_ha;
823 struct sas_phy *phy;
824
825 if (!dev || !dev->lldd_dev)
826 return -ENODEV;
827
828 pm8001_dev = dev->lldd_dev;
829 pm8001_ha = pm8001_find_ha_by_dev(dev);
830 phy = sas_get_local_phy(dev);
831
832 if (dev_is_sata(dev)) {
833 if (scsi_is_sas_phy_local(phy)) {
834 rc = 0;
835 goto out;
836 }
837 rc = sas_phy_reset(phy, 1);
838 if (rc) {
839 pm8001_dbg(pm8001_ha, EH,
840 "phy reset failed for device %x\n"
841 "with rc %d\n", pm8001_dev->device_id, rc);
842 rc = TMF_RESP_FUNC_FAILED;
843 goto out;
844 }
845 msleep(2000);
846 rc = sas_execute_internal_abort_dev(dev, 0, NULL);
847 if (rc) {
848 pm8001_dbg(pm8001_ha, EH, "task abort failed %x\n"
849 "with rc %d\n", pm8001_dev->device_id, rc);
850 rc = TMF_RESP_FUNC_FAILED;
851 }
852 } else {
853 rc = sas_phy_reset(phy, 1);
854 msleep(2000);
855 }
856 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
857 pm8001_dev->device_id, rc);
858 out:
859 sas_put_local_phy(phy);
860 return rc;
861}
862
863/*
864* This function handle the IT_NEXUS_XXX event or completion
865* status code for SSP/SATA/SMP I/O request.
866*/
867int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
868{
869 int rc = TMF_RESP_FUNC_FAILED;
870 struct pm8001_device *pm8001_dev;
871 struct pm8001_hba_info *pm8001_ha;
872 struct sas_phy *phy;
873
874 if (!dev || !dev->lldd_dev)
875 return -1;
876
877 pm8001_dev = dev->lldd_dev;
878 pm8001_ha = pm8001_find_ha_by_dev(dev);
879
880 pm8001_dbg(pm8001_ha, EH, "I_T_Nexus handler invoked !!\n");
881
882 phy = sas_get_local_phy(dev);
883
884 if (dev_is_sata(dev)) {
885 DECLARE_COMPLETION_ONSTACK(completion_setstate);
886 if (scsi_is_sas_phy_local(phy)) {
887 rc = 0;
888 goto out;
889 }
890 /* send internal ssp/sata/smp abort command to FW */
891 sas_execute_internal_abort_dev(dev, 0, NULL);
892 msleep(100);
893
894 /* deregister the target device */
895 pm8001_dev_gone_notify(dev);
896 msleep(200);
897
898 /*send phy reset to hard reset target */
899 rc = sas_phy_reset(phy, 1);
900 msleep(2000);
901 pm8001_dev->setds_completion = &completion_setstate;
902
903 wait_for_completion(&completion_setstate);
904 } else {
905 /* send internal ssp/sata/smp abort command to FW */
906 sas_execute_internal_abort_dev(dev, 0, NULL);
907 msleep(100);
908
909 /* deregister the target device */
910 pm8001_dev_gone_notify(dev);
911 msleep(200);
912
913 /*send phy reset to hard reset target */
914 rc = sas_phy_reset(phy, 1);
915 msleep(2000);
916 }
917 pm8001_dbg(pm8001_ha, EH, " for device[%x]:rc=%d\n",
918 pm8001_dev->device_id, rc);
919out:
920 sas_put_local_phy(phy);
921
922 return rc;
923}
924/* mandatory SAM-3, the task reset the specified LUN*/
925int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
926{
927 int rc = TMF_RESP_FUNC_FAILED;
928 struct pm8001_device *pm8001_dev = dev->lldd_dev;
929 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
930 DECLARE_COMPLETION_ONSTACK(completion_setstate);
931
932 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
933 /*
934 * If the controller is in fatal error state,
935 * we will not get a response from the controller
936 */
937 pm8001_dbg(pm8001_ha, FAIL,
938 "LUN reset failed due to fatal errors\n");
939 return rc;
940 }
941
942 if (dev_is_sata(dev)) {
943 struct sas_phy *phy = sas_get_local_phy(dev);
944 sas_execute_internal_abort_dev(dev, 0, NULL);
945 rc = sas_phy_reset(phy, 1);
946 sas_put_local_phy(phy);
947 pm8001_dev->setds_completion = &completion_setstate;
948 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
949 pm8001_dev, DS_OPERATIONAL);
950 wait_for_completion(&completion_setstate);
951 } else {
952 rc = sas_lu_reset(dev, lun);
953 }
954 /* If failed, fall-through I_T_Nexus reset */
955 pm8001_dbg(pm8001_ha, EH, "for device[%x]:rc=%d\n",
956 pm8001_dev->device_id, rc);
957 return rc;
958}
959
960/* optional SAM-3 */
961int pm8001_query_task(struct sas_task *task)
962{
963 u32 tag = 0xdeadbeef;
964 int rc = TMF_RESP_FUNC_FAILED;
965 if (unlikely(!task || !task->lldd_task || !task->dev))
966 return rc;
967
968 if (task->task_proto & SAS_PROTOCOL_SSP) {
969 struct scsi_cmnd *cmnd = task->uldd_task;
970 struct domain_device *dev = task->dev;
971 struct pm8001_hba_info *pm8001_ha =
972 pm8001_find_ha_by_dev(dev);
973
974 rc = pm8001_find_tag(task, &tag);
975 if (rc == 0) {
976 rc = TMF_RESP_FUNC_FAILED;
977 return rc;
978 }
979 pm8001_dbg(pm8001_ha, EH, "Query:[%16ph]\n", cmnd->cmnd);
980
981 rc = sas_query_task(task, tag);
982 switch (rc) {
983 /* The task is still in Lun, release it then */
984 case TMF_RESP_FUNC_SUCC:
985 pm8001_dbg(pm8001_ha, EH,
986 "The task is still in Lun\n");
987 break;
988 /* The task is not in Lun or failed, reset the phy */
989 case TMF_RESP_FUNC_FAILED:
990 case TMF_RESP_FUNC_COMPLETE:
991 pm8001_dbg(pm8001_ha, EH,
992 "The task is not in Lun or failed, reset the phy\n");
993 break;
994 }
995 }
996 pr_err("pm80xx: rc= %d\n", rc);
997 return rc;
998}
999
1000/* mandatory SAM-3, still need free task/ccb info, abort the specified task */
1001int pm8001_abort_task(struct sas_task *task)
1002{
1003 struct pm8001_ccb_info *ccb = task->lldd_task;
1004 unsigned long flags;
1005 u32 tag;
1006 struct domain_device *dev ;
1007 struct pm8001_hba_info *pm8001_ha;
1008 struct pm8001_device *pm8001_dev;
1009 int rc = TMF_RESP_FUNC_FAILED, ret;
1010 u32 phy_id, port_id;
1011 struct sas_task_slow slow_task;
1012
1013 if (!task->lldd_task || !task->dev)
1014 return TMF_RESP_FUNC_FAILED;
1015
1016 dev = task->dev;
1017 pm8001_dev = dev->lldd_dev;
1018 pm8001_ha = pm8001_find_ha_by_dev(dev);
1019 phy_id = pm8001_dev->attached_phy;
1020
1021 if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
1022 // If the controller is seeing fatal errors
1023 // abort task will not get a response from the controller
1024 return TMF_RESP_FUNC_FAILED;
1025 }
1026
1027 ret = pm8001_find_tag(task, &tag);
1028 if (ret == 0) {
1029 pm8001_info(pm8001_ha, "no tag for task:%p\n", task);
1030 return TMF_RESP_FUNC_FAILED;
1031 }
1032 spin_lock_irqsave(&task->task_state_lock, flags);
1033 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1034 spin_unlock_irqrestore(&task->task_state_lock, flags);
1035 return TMF_RESP_FUNC_COMPLETE;
1036 }
1037 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1038 if (task->slow_task == NULL) {
1039 init_completion(&slow_task.completion);
1040 task->slow_task = &slow_task;
1041 }
1042 spin_unlock_irqrestore(&task->task_state_lock, flags);
1043 if (task->task_proto & SAS_PROTOCOL_SSP) {
1044 rc = sas_abort_task(task, tag);
1045 sas_execute_internal_abort_single(dev, tag, 0, NULL);
1046 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1047 task->task_proto & SAS_PROTOCOL_STP) {
1048 if (pm8001_ha->chip_id == chip_8006) {
1049 DECLARE_COMPLETION_ONSTACK(completion_reset);
1050 DECLARE_COMPLETION_ONSTACK(completion);
1051 struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1052 port_id = phy->port->port_id;
1053
1054 /* 1. Set Device state as Recovery */
1055 pm8001_dev->setds_completion = &completion;
1056 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1057 pm8001_dev, DS_IN_RECOVERY);
1058 wait_for_completion(&completion);
1059
1060 /* 2. Send Phy Control Hard Reset */
1061 reinit_completion(&completion);
1062 phy->port_reset_status = PORT_RESET_TMO;
1063 phy->reset_success = false;
1064 phy->enable_completion = &completion;
1065 phy->reset_completion = &completion_reset;
1066 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1067 PHY_HARD_RESET);
1068 if (ret) {
1069 phy->enable_completion = NULL;
1070 phy->reset_completion = NULL;
1071 goto out;
1072 }
1073
1074 /* In the case of the reset timeout/fail we still
1075 * abort the command at the firmware. The assumption
1076 * here is that the drive is off doing something so
1077 * that it's not processing requests, and we want to
1078 * avoid getting a completion for this and either
1079 * leaking the task in libsas or losing the race and
1080 * getting a double free.
1081 */
1082 pm8001_dbg(pm8001_ha, MSG,
1083 "Waiting for local phy ctl\n");
1084 ret = wait_for_completion_timeout(&completion,
1085 PM8001_TASK_TIMEOUT * HZ);
1086 if (!ret || !phy->reset_success) {
1087 phy->enable_completion = NULL;
1088 phy->reset_completion = NULL;
1089 } else {
1090 /* 3. Wait for Port Reset complete or
1091 * Port reset TMO
1092 */
1093 pm8001_dbg(pm8001_ha, MSG,
1094 "Waiting for Port reset\n");
1095 ret = wait_for_completion_timeout(
1096 &completion_reset,
1097 PM8001_TASK_TIMEOUT * HZ);
1098 if (!ret)
1099 phy->reset_completion = NULL;
1100 WARN_ON(phy->port_reset_status ==
1101 PORT_RESET_TMO);
1102 if (phy->port_reset_status == PORT_RESET_TMO) {
1103 pm8001_dev_gone_notify(dev);
1104 PM8001_CHIP_DISP->hw_event_ack_req(
1105 pm8001_ha, 0,
1106 0x07, /*HW_EVENT_PHY_DOWN ack*/
1107 port_id, phy_id, 0, 0);
1108 goto out;
1109 }
1110 }
1111
1112 /*
1113 * 4. SATA Abort ALL
1114 * we wait for the task to be aborted so that the task
1115 * is removed from the ccb. on success the caller is
1116 * going to free the task.
1117 */
1118 ret = sas_execute_internal_abort_dev(dev, 0, NULL);
1119 if (ret)
1120 goto out;
1121 ret = wait_for_completion_timeout(
1122 &task->slow_task->completion,
1123 PM8001_TASK_TIMEOUT * HZ);
1124 if (!ret)
1125 goto out;
1126
1127 /* 5. Set Device State as Operational */
1128 reinit_completion(&completion);
1129 pm8001_dev->setds_completion = &completion;
1130 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1131 pm8001_dev, DS_OPERATIONAL);
1132 wait_for_completion(&completion);
1133 } else {
1134 /*
1135 * Ensure that if we see a completion for the ccb
1136 * associated with the task which we are trying to
1137 * abort then we should not touch the sas_task as it
1138 * may race with libsas freeing it when return here.
1139 */
1140 ccb->task = NULL;
1141 ret = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1142 }
1143 rc = TMF_RESP_FUNC_COMPLETE;
1144 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1145 /* SMP */
1146 rc = sas_execute_internal_abort_single(dev, tag, 0, NULL);
1147
1148 }
1149out:
1150 spin_lock_irqsave(&task->task_state_lock, flags);
1151 if (task->slow_task == &slow_task)
1152 task->slow_task = NULL;
1153 spin_unlock_irqrestore(&task->task_state_lock, flags);
1154 if (rc != TMF_RESP_FUNC_COMPLETE)
1155 pm8001_info(pm8001_ha, "rc= %d\n", rc);
1156 return rc;
1157}
1158
1159int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1160{
1161 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1162 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1163
1164 pm8001_dbg(pm8001_ha, EH, "I_T_L_Q clear task set[%x]\n",
1165 pm8001_dev->device_id);
1166 return sas_clear_task_set(dev, lun);
1167}
1168
1169void pm8001_port_formed(struct asd_sas_phy *sas_phy)
1170{
1171 struct sas_ha_struct *sas_ha = sas_phy->ha;
1172 struct pm8001_hba_info *pm8001_ha = sas_ha->lldd_ha;
1173 struct pm8001_phy *phy = sas_phy->lldd_phy;
1174 struct asd_sas_port *sas_port = sas_phy->port;
1175 struct pm8001_port *port = phy->port;
1176
1177 if (!sas_port) {
1178 pm8001_dbg(pm8001_ha, FAIL, "Received null port\n");
1179 return;
1180 }
1181 sas_port->lldd_port = port;
1182}
1183
1184void pm8001_setds_completion(struct domain_device *dev)
1185{
1186 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1187 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1188 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1189
1190 if (pm8001_ha->chip_id != chip_8001) {
1191 pm8001_dev->setds_completion = &completion_setstate;
1192 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1193 pm8001_dev, DS_OPERATIONAL);
1194 wait_for_completion(&completion_setstate);
1195 }
1196}
1197
1198void pm8001_tmf_aborted(struct sas_task *task)
1199{
1200 struct pm8001_ccb_info *ccb = task->lldd_task;
1201
1202 if (ccb)
1203 ccb->task = NULL;
1204}