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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
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_free - free the no more needed tag
62 * @pm8001_ha: our hba struct
63 * @tag: the found tag associated with the task
64 */
65void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
66{
67 void *bitmap = pm8001_ha->tags;
68 clear_bit(tag, bitmap);
69}
70
71/**
72 * pm8001_tag_alloc - allocate a empty tag for task used.
73 * @pm8001_ha: our hba struct
74 * @tag_out: the found empty tag .
75 */
76inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
77{
78 unsigned int tag;
79 void *bitmap = pm8001_ha->tags;
80 unsigned long flags;
81
82 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
83 tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
84 if (tag >= pm8001_ha->tags_num) {
85 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
86 return -SAS_QUEUE_FULL;
87 }
88 set_bit(tag, bitmap);
89 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
90 *tag_out = tag;
91 return 0;
92}
93
94void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
95{
96 int i;
97 for (i = 0; i < pm8001_ha->tags_num; ++i)
98 pm8001_tag_free(pm8001_ha, i);
99}
100
101 /**
102 * pm8001_mem_alloc - allocate memory for pm8001.
103 * @pdev: pci device.
104 * @virt_addr: the allocated virtual address
105 * @pphys_addr_hi: the physical address high byte address.
106 * @pphys_addr_lo: the physical address low byte address.
107 * @mem_size: memory size.
108 */
109int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
110 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
111 u32 *pphys_addr_lo, u32 mem_size, u32 align)
112{
113 caddr_t mem_virt_alloc;
114 dma_addr_t mem_dma_handle;
115 u64 phys_align;
116 u64 align_offset = 0;
117 if (align)
118 align_offset = (dma_addr_t)align - 1;
119 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
120 &mem_dma_handle, GFP_KERNEL);
121 if (!mem_virt_alloc) {
122 pr_err("pm80xx: memory allocation error\n");
123 return -1;
124 }
125 *pphys_addr = mem_dma_handle;
126 phys_align = (*pphys_addr + align_offset) & ~align_offset;
127 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
128 *pphys_addr_hi = upper_32_bits(phys_align);
129 *pphys_addr_lo = lower_32_bits(phys_align);
130 return 0;
131}
132
133/**
134 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
135 * find out our hba struct.
136 * @dev: the domain device which from sas layer.
137 */
138static
139struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
140{
141 struct sas_ha_struct *sha = dev->port->ha;
142 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
143 return pm8001_ha;
144}
145
146/**
147 * pm8001_phy_control - this function should be registered to
148 * sas_domain_function_template to provide libsas used, note: this is just
149 * control the HBA phy rather than other expander phy if you want control
150 * other phy, you should use SMP command.
151 * @sas_phy: which phy in HBA phys.
152 * @func: the operation.
153 * @funcdata: always NULL.
154 */
155int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
156 void *funcdata)
157{
158 int rc = 0, phy_id = sas_phy->id;
159 struct pm8001_hba_info *pm8001_ha = NULL;
160 struct sas_phy_linkrates *rates;
161 struct sas_ha_struct *sas_ha;
162 struct pm8001_phy *phy;
163 DECLARE_COMPLETION_ONSTACK(completion);
164 unsigned long flags;
165 pm8001_ha = sas_phy->ha->lldd_ha;
166 phy = &pm8001_ha->phy[phy_id];
167 pm8001_ha->phy[phy_id].enable_completion = &completion;
168 switch (func) {
169 case PHY_FUNC_SET_LINK_RATE:
170 rates = funcdata;
171 if (rates->minimum_linkrate) {
172 pm8001_ha->phy[phy_id].minimum_linkrate =
173 rates->minimum_linkrate;
174 }
175 if (rates->maximum_linkrate) {
176 pm8001_ha->phy[phy_id].maximum_linkrate =
177 rates->maximum_linkrate;
178 }
179 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
180 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
181 wait_for_completion(&completion);
182 }
183 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
184 PHY_LINK_RESET);
185 break;
186 case PHY_FUNC_HARD_RESET:
187 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
188 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
189 wait_for_completion(&completion);
190 }
191 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
192 PHY_HARD_RESET);
193 break;
194 case PHY_FUNC_LINK_RESET:
195 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
196 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
197 wait_for_completion(&completion);
198 }
199 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
200 PHY_LINK_RESET);
201 break;
202 case PHY_FUNC_RELEASE_SPINUP_HOLD:
203 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
204 PHY_LINK_RESET);
205 break;
206 case PHY_FUNC_DISABLE:
207 if (pm8001_ha->chip_id != chip_8001) {
208 if (pm8001_ha->phy[phy_id].phy_state ==
209 PHY_STATE_LINK_UP_SPCV) {
210 sas_ha = pm8001_ha->sas;
211 sas_phy_disconnected(&phy->sas_phy);
212 sas_ha->notify_phy_event(&phy->sas_phy,
213 PHYE_LOSS_OF_SIGNAL);
214 phy->phy_attached = 0;
215 }
216 } else {
217 if (pm8001_ha->phy[phy_id].phy_state ==
218 PHY_STATE_LINK_UP_SPC) {
219 sas_ha = pm8001_ha->sas;
220 sas_phy_disconnected(&phy->sas_phy);
221 sas_ha->notify_phy_event(&phy->sas_phy,
222 PHYE_LOSS_OF_SIGNAL);
223 phy->phy_attached = 0;
224 }
225 }
226 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
227 break;
228 case PHY_FUNC_GET_EVENTS:
229 spin_lock_irqsave(&pm8001_ha->lock, flags);
230 if (pm8001_ha->chip_id == chip_8001) {
231 if (-1 == pm8001_bar4_shift(pm8001_ha,
232 (phy_id < 4) ? 0x30000 : 0x40000)) {
233 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
234 return -EINVAL;
235 }
236 }
237 {
238 struct sas_phy *phy = sas_phy->phy;
239 uint32_t *qp = (uint32_t *)(((char *)
240 pm8001_ha->io_mem[2].memvirtaddr)
241 + 0x1034 + (0x4000 * (phy_id & 3)));
242
243 phy->invalid_dword_count = qp[0];
244 phy->running_disparity_error_count = qp[1];
245 phy->loss_of_dword_sync_count = qp[3];
246 phy->phy_reset_problem_count = qp[4];
247 }
248 if (pm8001_ha->chip_id == chip_8001)
249 pm8001_bar4_shift(pm8001_ha, 0);
250 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
251 return 0;
252 default:
253 PM8001_DEVIO_DBG(pm8001_ha,
254 pm8001_printk("func 0x%x\n", func));
255 rc = -EOPNOTSUPP;
256 }
257 msleep(300);
258 return rc;
259}
260
261/**
262 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
263 * command to HBA.
264 * @shost: the scsi host data.
265 */
266void pm8001_scan_start(struct Scsi_Host *shost)
267{
268 int i;
269 struct pm8001_hba_info *pm8001_ha;
270 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
271 pm8001_ha = sha->lldd_ha;
272 /* SAS_RE_INITIALIZATION not available in SPCv/ve */
273 if (pm8001_ha->chip_id == chip_8001)
274 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
275 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
276 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
277}
278
279int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
280{
281 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
282
283 /* give the phy enabling interrupt event time to come in (1s
284 * is empirically about all it takes) */
285 if (time < HZ)
286 return 0;
287 /* Wait for discovery to finish */
288 sas_drain_work(ha);
289 return 1;
290}
291
292/**
293 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
294 * @pm8001_ha: our hba card information
295 * @ccb: the ccb which attached to smp task
296 */
297static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
298 struct pm8001_ccb_info *ccb)
299{
300 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
301}
302
303u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
304{
305 struct ata_queued_cmd *qc = task->uldd_task;
306 if (qc) {
307 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
308 qc->tf.command == ATA_CMD_FPDMA_READ ||
309 qc->tf.command == ATA_CMD_FPDMA_RECV ||
310 qc->tf.command == ATA_CMD_FPDMA_SEND ||
311 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
312 *tag = qc->tag;
313 return 1;
314 }
315 }
316 return 0;
317}
318
319/**
320 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
321 * @pm8001_ha: our hba card information
322 * @ccb: the ccb which attached to sata task
323 */
324static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
325 struct pm8001_ccb_info *ccb)
326{
327 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
328}
329
330/**
331 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
332 * @pm8001_ha: our hba card information
333 * @ccb: the ccb which attached to TM
334 * @tmf: the task management IU
335 */
336static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
337 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
338{
339 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
340}
341
342/**
343 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
344 * @pm8001_ha: our hba card information
345 * @ccb: the ccb which attached to ssp task
346 */
347static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
348 struct pm8001_ccb_info *ccb)
349{
350 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
351}
352
353 /* Find the local port id that's attached to this device */
354static int sas_find_local_port_id(struct domain_device *dev)
355{
356 struct domain_device *pdev = dev->parent;
357
358 /* Directly attached device */
359 if (!pdev)
360 return dev->port->id;
361 while (pdev) {
362 struct domain_device *pdev_p = pdev->parent;
363 if (!pdev_p)
364 return pdev->port->id;
365 pdev = pdev->parent;
366 }
367 return 0;
368}
369
370#define DEV_IS_GONE(pm8001_dev) \
371 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
372/**
373 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
374 * @task: the task to be execute.
375 * @gfp_flags: gfp_flags.
376 * @is_tmf: if it is task management task.
377 * @tmf: the task management IU
378 */
379static int pm8001_task_exec(struct sas_task *task,
380 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
381{
382 struct domain_device *dev = task->dev;
383 struct pm8001_hba_info *pm8001_ha;
384 struct pm8001_device *pm8001_dev;
385 struct pm8001_port *port = NULL;
386 struct sas_task *t = task;
387 struct pm8001_ccb_info *ccb;
388 u32 tag = 0xdeadbeef, rc = 0, n_elem = 0;
389 unsigned long flags = 0;
390 enum sas_protocol task_proto = t->task_proto;
391
392 if (!dev->port) {
393 struct task_status_struct *tsm = &t->task_status;
394 tsm->resp = SAS_TASK_UNDELIVERED;
395 tsm->stat = SAS_PHY_DOWN;
396 if (dev->dev_type != SAS_SATA_DEV)
397 t->task_done(t);
398 return 0;
399 }
400 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
401 if (pm8001_ha->controller_fatal_error) {
402 struct task_status_struct *ts = &t->task_status;
403
404 ts->resp = SAS_TASK_UNDELIVERED;
405 t->task_done(t);
406 return 0;
407 }
408 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
409 spin_lock_irqsave(&pm8001_ha->lock, flags);
410 do {
411 dev = t->dev;
412 pm8001_dev = dev->lldd_dev;
413 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
414 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
415 if (sas_protocol_ata(task_proto)) {
416 struct task_status_struct *ts = &t->task_status;
417 ts->resp = SAS_TASK_UNDELIVERED;
418 ts->stat = SAS_PHY_DOWN;
419
420 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
421 t->task_done(t);
422 spin_lock_irqsave(&pm8001_ha->lock, flags);
423 continue;
424 } else {
425 struct task_status_struct *ts = &t->task_status;
426 ts->resp = SAS_TASK_UNDELIVERED;
427 ts->stat = SAS_PHY_DOWN;
428 t->task_done(t);
429 continue;
430 }
431 }
432 rc = pm8001_tag_alloc(pm8001_ha, &tag);
433 if (rc)
434 goto err_out;
435 ccb = &pm8001_ha->ccb_info[tag];
436
437 if (!sas_protocol_ata(task_proto)) {
438 if (t->num_scatter) {
439 n_elem = dma_map_sg(pm8001_ha->dev,
440 t->scatter,
441 t->num_scatter,
442 t->data_dir);
443 if (!n_elem) {
444 rc = -ENOMEM;
445 goto err_out_tag;
446 }
447 }
448 } else {
449 n_elem = t->num_scatter;
450 }
451
452 t->lldd_task = ccb;
453 ccb->n_elem = n_elem;
454 ccb->ccb_tag = tag;
455 ccb->task = t;
456 ccb->device = pm8001_dev;
457 switch (task_proto) {
458 case SAS_PROTOCOL_SMP:
459 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
460 break;
461 case SAS_PROTOCOL_SSP:
462 if (is_tmf)
463 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
464 ccb, tmf);
465 else
466 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
467 break;
468 case SAS_PROTOCOL_SATA:
469 case SAS_PROTOCOL_STP:
470 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
471 break;
472 default:
473 dev_printk(KERN_ERR, pm8001_ha->dev,
474 "unknown sas_task proto: 0x%x\n", task_proto);
475 rc = -EINVAL;
476 break;
477 }
478
479 if (rc) {
480 PM8001_IO_DBG(pm8001_ha,
481 pm8001_printk("rc is %x\n", rc));
482 goto err_out_tag;
483 }
484 /* TODO: select normal or high priority */
485 spin_lock(&t->task_state_lock);
486 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
487 spin_unlock(&t->task_state_lock);
488 pm8001_dev->running_req++;
489 } while (0);
490 rc = 0;
491 goto out_done;
492
493err_out_tag:
494 pm8001_tag_free(pm8001_ha, tag);
495err_out:
496 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
497 if (!sas_protocol_ata(task_proto))
498 if (n_elem)
499 dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
500 t->data_dir);
501out_done:
502 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
503 return rc;
504}
505
506/**
507 * pm8001_queue_command - register for upper layer used, all IO commands sent
508 * to HBA are from this interface.
509 * @task: the task to be execute.
510 * @gfp_flags: gfp_flags
511 */
512int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
513{
514 return pm8001_task_exec(task, gfp_flags, 0, NULL);
515}
516
517/**
518 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
519 * @pm8001_ha: our hba card information
520 * @ccb: the ccb which attached to ssp task
521 * @task: the task to be free.
522 * @ccb_idx: ccb index.
523 */
524void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
525 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
526{
527 if (!ccb->task)
528 return;
529 if (!sas_protocol_ata(task->task_proto))
530 if (ccb->n_elem)
531 dma_unmap_sg(pm8001_ha->dev, task->scatter,
532 task->num_scatter, task->data_dir);
533
534 switch (task->task_proto) {
535 case SAS_PROTOCOL_SMP:
536 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
537 DMA_FROM_DEVICE);
538 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
539 DMA_TO_DEVICE);
540 break;
541
542 case SAS_PROTOCOL_SATA:
543 case SAS_PROTOCOL_STP:
544 case SAS_PROTOCOL_SSP:
545 default:
546 /* do nothing */
547 break;
548 }
549 task->lldd_task = NULL;
550 ccb->task = NULL;
551 ccb->ccb_tag = 0xFFFFFFFF;
552 ccb->open_retry = 0;
553 pm8001_tag_free(pm8001_ha, ccb_idx);
554}
555
556 /**
557 * pm8001_alloc_dev - find a empty pm8001_device
558 * @pm8001_ha: our hba card information
559 */
560static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
561{
562 u32 dev;
563 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
564 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
565 pm8001_ha->devices[dev].id = dev;
566 return &pm8001_ha->devices[dev];
567 }
568 }
569 if (dev == PM8001_MAX_DEVICES) {
570 PM8001_FAIL_DBG(pm8001_ha,
571 pm8001_printk("max support %d devices, ignore ..\n",
572 PM8001_MAX_DEVICES));
573 }
574 return NULL;
575}
576/**
577 * pm8001_find_dev - find a matching pm8001_device
578 * @pm8001_ha: our hba card information
579 * @device_id: device ID to match against
580 */
581struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
582 u32 device_id)
583{
584 u32 dev;
585 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
586 if (pm8001_ha->devices[dev].device_id == device_id)
587 return &pm8001_ha->devices[dev];
588 }
589 if (dev == PM8001_MAX_DEVICES) {
590 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
591 "DEVICE FOUND !!!\n"));
592 }
593 return NULL;
594}
595
596static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
597{
598 u32 id = pm8001_dev->id;
599 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
600 pm8001_dev->id = id;
601 pm8001_dev->dev_type = SAS_PHY_UNUSED;
602 pm8001_dev->device_id = PM8001_MAX_DEVICES;
603 pm8001_dev->sas_device = NULL;
604}
605
606/**
607 * pm8001_dev_found_notify - libsas notify a device is found.
608 * @dev: the device structure which sas layer used.
609 *
610 * when libsas find a sas domain device, it should tell the LLDD that
611 * device is found, and then LLDD register this device to HBA firmware
612 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
613 * device ID(according to device's sas address) and returned it to LLDD. From
614 * now on, we communicate with HBA FW with the device ID which HBA assigned
615 * rather than sas address. it is the necessary step for our HBA but it is
616 * the optional for other HBA driver.
617 */
618static int pm8001_dev_found_notify(struct domain_device *dev)
619{
620 unsigned long flags = 0;
621 int res = 0;
622 struct pm8001_hba_info *pm8001_ha = NULL;
623 struct domain_device *parent_dev = dev->parent;
624 struct pm8001_device *pm8001_device;
625 DECLARE_COMPLETION_ONSTACK(completion);
626 u32 flag = 0;
627 pm8001_ha = pm8001_find_ha_by_dev(dev);
628 spin_lock_irqsave(&pm8001_ha->lock, flags);
629
630 pm8001_device = pm8001_alloc_dev(pm8001_ha);
631 if (!pm8001_device) {
632 res = -1;
633 goto found_out;
634 }
635 pm8001_device->sas_device = dev;
636 dev->lldd_dev = pm8001_device;
637 pm8001_device->dev_type = dev->dev_type;
638 pm8001_device->dcompletion = &completion;
639 if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
640 int phy_id;
641 struct ex_phy *phy;
642 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
643 phy_id++) {
644 phy = &parent_dev->ex_dev.ex_phy[phy_id];
645 if (SAS_ADDR(phy->attached_sas_addr)
646 == SAS_ADDR(dev->sas_addr)) {
647 pm8001_device->attached_phy = phy_id;
648 break;
649 }
650 }
651 if (phy_id == parent_dev->ex_dev.num_phys) {
652 PM8001_FAIL_DBG(pm8001_ha,
653 pm8001_printk("Error: no attached dev:%016llx"
654 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
655 SAS_ADDR(parent_dev->sas_addr)));
656 res = -1;
657 }
658 } else {
659 if (dev->dev_type == SAS_SATA_DEV) {
660 pm8001_device->attached_phy =
661 dev->rphy->identify.phy_identifier;
662 flag = 1; /* directly sata */
663 }
664 } /*register this device to HBA*/
665 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
666 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
667 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
668 wait_for_completion(&completion);
669 if (dev->dev_type == SAS_END_DEVICE)
670 msleep(50);
671 pm8001_ha->flags = PM8001F_RUN_TIME;
672 return 0;
673found_out:
674 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
675 return res;
676}
677
678int pm8001_dev_found(struct domain_device *dev)
679{
680 return pm8001_dev_found_notify(dev);
681}
682
683void pm8001_task_done(struct sas_task *task)
684{
685 if (!del_timer(&task->slow_task->timer))
686 return;
687 complete(&task->slow_task->completion);
688}
689
690static void pm8001_tmf_timedout(struct timer_list *t)
691{
692 struct sas_task_slow *slow = from_timer(slow, t, timer);
693 struct sas_task *task = slow->task;
694
695 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
696 complete(&task->slow_task->completion);
697}
698
699#define PM8001_TASK_TIMEOUT 20
700/**
701 * pm8001_exec_internal_tmf_task - execute some task management commands.
702 * @dev: the wanted device.
703 * @tmf: which task management wanted to be take.
704 * @para_len: para_len.
705 * @parameter: ssp task parameter.
706 *
707 * when errors or exception happened, we may want to do something, for example
708 * abort the issued task which result in this execption, it is done by calling
709 * this function, note it is also with the task execute interface.
710 */
711static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
712 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
713{
714 int res, retry;
715 struct sas_task *task = NULL;
716 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
717 struct pm8001_device *pm8001_dev = dev->lldd_dev;
718 DECLARE_COMPLETION_ONSTACK(completion_setstate);
719
720 for (retry = 0; retry < 3; retry++) {
721 task = sas_alloc_slow_task(GFP_KERNEL);
722 if (!task)
723 return -ENOMEM;
724
725 task->dev = dev;
726 task->task_proto = dev->tproto;
727 memcpy(&task->ssp_task, parameter, para_len);
728 task->task_done = pm8001_task_done;
729 task->slow_task->timer.function = pm8001_tmf_timedout;
730 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
731 add_timer(&task->slow_task->timer);
732
733 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
734
735 if (res) {
736 del_timer(&task->slow_task->timer);
737 PM8001_FAIL_DBG(pm8001_ha,
738 pm8001_printk("Executing internal task "
739 "failed\n"));
740 goto ex_err;
741 }
742 wait_for_completion(&task->slow_task->completion);
743 if (pm8001_ha->chip_id != chip_8001) {
744 pm8001_dev->setds_completion = &completion_setstate;
745 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
746 pm8001_dev, 0x01);
747 wait_for_completion(&completion_setstate);
748 }
749 res = -TMF_RESP_FUNC_FAILED;
750 /* Even TMF timed out, return direct. */
751 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
752 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
753 PM8001_FAIL_DBG(pm8001_ha,
754 pm8001_printk("TMF task[%x]timeout.\n",
755 tmf->tmf));
756 goto ex_err;
757 }
758 }
759
760 if (task->task_status.resp == SAS_TASK_COMPLETE &&
761 task->task_status.stat == SAM_STAT_GOOD) {
762 res = TMF_RESP_FUNC_COMPLETE;
763 break;
764 }
765
766 if (task->task_status.resp == SAS_TASK_COMPLETE &&
767 task->task_status.stat == SAS_DATA_UNDERRUN) {
768 /* no error, but return the number of bytes of
769 * underrun */
770 res = task->task_status.residual;
771 break;
772 }
773
774 if (task->task_status.resp == SAS_TASK_COMPLETE &&
775 task->task_status.stat == SAS_DATA_OVERRUN) {
776 PM8001_FAIL_DBG(pm8001_ha,
777 pm8001_printk("Blocked task error.\n"));
778 res = -EMSGSIZE;
779 break;
780 } else {
781 PM8001_EH_DBG(pm8001_ha,
782 pm8001_printk(" Task to dev %016llx response:"
783 "0x%x status 0x%x\n",
784 SAS_ADDR(dev->sas_addr),
785 task->task_status.resp,
786 task->task_status.stat));
787 sas_free_task(task);
788 task = NULL;
789 }
790 }
791ex_err:
792 BUG_ON(retry == 3 && task != NULL);
793 sas_free_task(task);
794 return res;
795}
796
797static int
798pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
799 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
800 u32 task_tag)
801{
802 int res, retry;
803 u32 ccb_tag;
804 struct pm8001_ccb_info *ccb;
805 struct sas_task *task = NULL;
806
807 for (retry = 0; retry < 3; retry++) {
808 task = sas_alloc_slow_task(GFP_KERNEL);
809 if (!task)
810 return -ENOMEM;
811
812 task->dev = dev;
813 task->task_proto = dev->tproto;
814 task->task_done = pm8001_task_done;
815 task->slow_task->timer.function = pm8001_tmf_timedout;
816 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
817 add_timer(&task->slow_task->timer);
818
819 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
820 if (res)
821 goto ex_err;
822 ccb = &pm8001_ha->ccb_info[ccb_tag];
823 ccb->device = pm8001_dev;
824 ccb->ccb_tag = ccb_tag;
825 ccb->task = task;
826 ccb->n_elem = 0;
827
828 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
829 pm8001_dev, flag, task_tag, ccb_tag);
830
831 if (res) {
832 del_timer(&task->slow_task->timer);
833 PM8001_FAIL_DBG(pm8001_ha,
834 pm8001_printk("Executing internal task "
835 "failed\n"));
836 goto ex_err;
837 }
838 wait_for_completion(&task->slow_task->completion);
839 res = TMF_RESP_FUNC_FAILED;
840 /* Even TMF timed out, return direct. */
841 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
842 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
843 PM8001_FAIL_DBG(pm8001_ha,
844 pm8001_printk("TMF task timeout.\n"));
845 goto ex_err;
846 }
847 }
848
849 if (task->task_status.resp == SAS_TASK_COMPLETE &&
850 task->task_status.stat == SAM_STAT_GOOD) {
851 res = TMF_RESP_FUNC_COMPLETE;
852 break;
853
854 } else {
855 PM8001_EH_DBG(pm8001_ha,
856 pm8001_printk(" Task to dev %016llx response: "
857 "0x%x status 0x%x\n",
858 SAS_ADDR(dev->sas_addr),
859 task->task_status.resp,
860 task->task_status.stat));
861 sas_free_task(task);
862 task = NULL;
863 }
864 }
865ex_err:
866 BUG_ON(retry == 3 && task != NULL);
867 sas_free_task(task);
868 return res;
869}
870
871/**
872 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
873 * @dev: the device structure which sas layer used.
874 */
875static void pm8001_dev_gone_notify(struct domain_device *dev)
876{
877 unsigned long flags = 0;
878 struct pm8001_hba_info *pm8001_ha;
879 struct pm8001_device *pm8001_dev = dev->lldd_dev;
880
881 pm8001_ha = pm8001_find_ha_by_dev(dev);
882 spin_lock_irqsave(&pm8001_ha->lock, flags);
883 if (pm8001_dev) {
884 u32 device_id = pm8001_dev->device_id;
885
886 PM8001_DISC_DBG(pm8001_ha,
887 pm8001_printk("found dev[%d:%x] is gone.\n",
888 pm8001_dev->device_id, pm8001_dev->dev_type));
889 if (pm8001_dev->running_req) {
890 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
891 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
892 dev, 1, 0);
893 while (pm8001_dev->running_req)
894 msleep(20);
895 spin_lock_irqsave(&pm8001_ha->lock, flags);
896 }
897 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
898 pm8001_free_dev(pm8001_dev);
899 } else {
900 PM8001_DISC_DBG(pm8001_ha,
901 pm8001_printk("Found dev has gone.\n"));
902 }
903 dev->lldd_dev = NULL;
904 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
905}
906
907void pm8001_dev_gone(struct domain_device *dev)
908{
909 pm8001_dev_gone_notify(dev);
910}
911
912static int pm8001_issue_ssp_tmf(struct domain_device *dev,
913 u8 *lun, struct pm8001_tmf_task *tmf)
914{
915 struct sas_ssp_task ssp_task;
916 if (!(dev->tproto & SAS_PROTOCOL_SSP))
917 return TMF_RESP_FUNC_ESUPP;
918
919 strncpy((u8 *)&ssp_task.LUN, lun, 8);
920 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
921 tmf);
922}
923
924/* retry commands by ha, by task and/or by device */
925void pm8001_open_reject_retry(
926 struct pm8001_hba_info *pm8001_ha,
927 struct sas_task *task_to_close,
928 struct pm8001_device *device_to_close)
929{
930 int i;
931 unsigned long flags;
932
933 if (pm8001_ha == NULL)
934 return;
935
936 spin_lock_irqsave(&pm8001_ha->lock, flags);
937
938 for (i = 0; i < PM8001_MAX_CCB; i++) {
939 struct sas_task *task;
940 struct task_status_struct *ts;
941 struct pm8001_device *pm8001_dev;
942 unsigned long flags1;
943 u32 tag;
944 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
945
946 pm8001_dev = ccb->device;
947 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
948 continue;
949 if (!device_to_close) {
950 uintptr_t d = (uintptr_t)pm8001_dev
951 - (uintptr_t)&pm8001_ha->devices;
952 if (((d % sizeof(*pm8001_dev)) != 0)
953 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
954 continue;
955 } else if (pm8001_dev != device_to_close)
956 continue;
957 tag = ccb->ccb_tag;
958 if (!tag || (tag == 0xFFFFFFFF))
959 continue;
960 task = ccb->task;
961 if (!task || !task->task_done)
962 continue;
963 if (task_to_close && (task != task_to_close))
964 continue;
965 ts = &task->task_status;
966 ts->resp = SAS_TASK_COMPLETE;
967 /* Force the midlayer to retry */
968 ts->stat = SAS_OPEN_REJECT;
969 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
970 if (pm8001_dev)
971 pm8001_dev->running_req--;
972 spin_lock_irqsave(&task->task_state_lock, flags1);
973 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
974 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
975 task->task_state_flags |= SAS_TASK_STATE_DONE;
976 if (unlikely((task->task_state_flags
977 & SAS_TASK_STATE_ABORTED))) {
978 spin_unlock_irqrestore(&task->task_state_lock,
979 flags1);
980 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
981 } else {
982 spin_unlock_irqrestore(&task->task_state_lock,
983 flags1);
984 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
985 mb();/* in order to force CPU ordering */
986 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
987 task->task_done(task);
988 spin_lock_irqsave(&pm8001_ha->lock, flags);
989 }
990 }
991
992 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
993}
994
995/**
996 * Standard mandates link reset for ATA (type 0) and hard reset for
997 * SSP (type 1) , only for RECOVERY
998 * @dev: the device structure for the device to reset.
999 */
1000int pm8001_I_T_nexus_reset(struct domain_device *dev)
1001{
1002 int rc = TMF_RESP_FUNC_FAILED;
1003 struct pm8001_device *pm8001_dev;
1004 struct pm8001_hba_info *pm8001_ha;
1005 struct sas_phy *phy;
1006
1007 if (!dev || !dev->lldd_dev)
1008 return -ENODEV;
1009
1010 pm8001_dev = dev->lldd_dev;
1011 pm8001_ha = pm8001_find_ha_by_dev(dev);
1012 phy = sas_get_local_phy(dev);
1013
1014 if (dev_is_sata(dev)) {
1015 if (scsi_is_sas_phy_local(phy)) {
1016 rc = 0;
1017 goto out;
1018 }
1019 rc = sas_phy_reset(phy, 1);
1020 if (rc) {
1021 PM8001_EH_DBG(pm8001_ha,
1022 pm8001_printk("phy reset failed for device %x\n"
1023 "with rc %d\n", pm8001_dev->device_id, rc));
1024 rc = TMF_RESP_FUNC_FAILED;
1025 goto out;
1026 }
1027 msleep(2000);
1028 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1029 dev, 1, 0);
1030 if (rc) {
1031 PM8001_EH_DBG(pm8001_ha,
1032 pm8001_printk("task abort failed %x\n"
1033 "with rc %d\n", pm8001_dev->device_id, rc));
1034 rc = TMF_RESP_FUNC_FAILED;
1035 }
1036 } else {
1037 rc = sas_phy_reset(phy, 1);
1038 msleep(2000);
1039 }
1040 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1041 pm8001_dev->device_id, rc));
1042 out:
1043 sas_put_local_phy(phy);
1044 return rc;
1045}
1046
1047/*
1048* This function handle the IT_NEXUS_XXX event or completion
1049* status code for SSP/SATA/SMP I/O request.
1050*/
1051int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1052{
1053 int rc = TMF_RESP_FUNC_FAILED;
1054 struct pm8001_device *pm8001_dev;
1055 struct pm8001_hba_info *pm8001_ha;
1056 struct sas_phy *phy;
1057
1058 if (!dev || !dev->lldd_dev)
1059 return -1;
1060
1061 pm8001_dev = dev->lldd_dev;
1062 pm8001_ha = pm8001_find_ha_by_dev(dev);
1063
1064 PM8001_EH_DBG(pm8001_ha,
1065 pm8001_printk("I_T_Nexus handler invoked !!"));
1066
1067 phy = sas_get_local_phy(dev);
1068
1069 if (dev_is_sata(dev)) {
1070 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1071 if (scsi_is_sas_phy_local(phy)) {
1072 rc = 0;
1073 goto out;
1074 }
1075 /* send internal ssp/sata/smp abort command to FW */
1076 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1077 dev, 1, 0);
1078 msleep(100);
1079
1080 /* deregister the target device */
1081 pm8001_dev_gone_notify(dev);
1082 msleep(200);
1083
1084 /*send phy reset to hard reset target */
1085 rc = sas_phy_reset(phy, 1);
1086 msleep(2000);
1087 pm8001_dev->setds_completion = &completion_setstate;
1088
1089 wait_for_completion(&completion_setstate);
1090 } else {
1091 /* send internal ssp/sata/smp abort command to FW */
1092 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1093 dev, 1, 0);
1094 msleep(100);
1095
1096 /* deregister the target device */
1097 pm8001_dev_gone_notify(dev);
1098 msleep(200);
1099
1100 /*send phy reset to hard reset target */
1101 rc = sas_phy_reset(phy, 1);
1102 msleep(2000);
1103 }
1104 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1105 pm8001_dev->device_id, rc));
1106out:
1107 sas_put_local_phy(phy);
1108
1109 return rc;
1110}
1111/* mandatory SAM-3, the task reset the specified LUN*/
1112int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1113{
1114 int rc = TMF_RESP_FUNC_FAILED;
1115 struct pm8001_tmf_task tmf_task;
1116 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1117 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1118 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1119 if (dev_is_sata(dev)) {
1120 struct sas_phy *phy = sas_get_local_phy(dev);
1121 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1122 dev, 1, 0);
1123 rc = sas_phy_reset(phy, 1);
1124 sas_put_local_phy(phy);
1125 pm8001_dev->setds_completion = &completion_setstate;
1126 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1127 pm8001_dev, 0x01);
1128 wait_for_completion(&completion_setstate);
1129 } else {
1130 tmf_task.tmf = TMF_LU_RESET;
1131 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1132 }
1133 /* If failed, fall-through I_T_Nexus reset */
1134 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1135 pm8001_dev->device_id, rc));
1136 return rc;
1137}
1138
1139/* optional SAM-3 */
1140int pm8001_query_task(struct sas_task *task)
1141{
1142 u32 tag = 0xdeadbeef;
1143 int i = 0;
1144 struct scsi_lun lun;
1145 struct pm8001_tmf_task tmf_task;
1146 int rc = TMF_RESP_FUNC_FAILED;
1147 if (unlikely(!task || !task->lldd_task || !task->dev))
1148 return rc;
1149
1150 if (task->task_proto & SAS_PROTOCOL_SSP) {
1151 struct scsi_cmnd *cmnd = task->uldd_task;
1152 struct domain_device *dev = task->dev;
1153 struct pm8001_hba_info *pm8001_ha =
1154 pm8001_find_ha_by_dev(dev);
1155
1156 int_to_scsilun(cmnd->device->lun, &lun);
1157 rc = pm8001_find_tag(task, &tag);
1158 if (rc == 0) {
1159 rc = TMF_RESP_FUNC_FAILED;
1160 return rc;
1161 }
1162 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1163 for (i = 0; i < 16; i++)
1164 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1165 printk(KERN_INFO "]\n");
1166 tmf_task.tmf = TMF_QUERY_TASK;
1167 tmf_task.tag_of_task_to_be_managed = tag;
1168
1169 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1170 switch (rc) {
1171 /* The task is still in Lun, release it then */
1172 case TMF_RESP_FUNC_SUCC:
1173 PM8001_EH_DBG(pm8001_ha,
1174 pm8001_printk("The task is still in Lun\n"));
1175 break;
1176 /* The task is not in Lun or failed, reset the phy */
1177 case TMF_RESP_FUNC_FAILED:
1178 case TMF_RESP_FUNC_COMPLETE:
1179 PM8001_EH_DBG(pm8001_ha,
1180 pm8001_printk("The task is not in Lun or failed,"
1181 " reset the phy\n"));
1182 break;
1183 }
1184 }
1185 pr_err("pm80xx: rc= %d\n", rc);
1186 return rc;
1187}
1188
1189/* mandatory SAM-3, still need free task/ccb info, abort the specified task */
1190int pm8001_abort_task(struct sas_task *task)
1191{
1192 unsigned long flags;
1193 u32 tag;
1194 struct domain_device *dev ;
1195 struct pm8001_hba_info *pm8001_ha;
1196 struct scsi_lun lun;
1197 struct pm8001_device *pm8001_dev;
1198 struct pm8001_tmf_task tmf_task;
1199 int rc = TMF_RESP_FUNC_FAILED, ret;
1200 u32 phy_id;
1201 struct sas_task_slow slow_task;
1202 if (unlikely(!task || !task->lldd_task || !task->dev))
1203 return TMF_RESP_FUNC_FAILED;
1204 dev = task->dev;
1205 pm8001_dev = dev->lldd_dev;
1206 pm8001_ha = pm8001_find_ha_by_dev(dev);
1207 phy_id = pm8001_dev->attached_phy;
1208 ret = pm8001_find_tag(task, &tag);
1209 if (ret == 0) {
1210 pm8001_printk("no tag for task:%p\n", task);
1211 return TMF_RESP_FUNC_FAILED;
1212 }
1213 spin_lock_irqsave(&task->task_state_lock, flags);
1214 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1215 spin_unlock_irqrestore(&task->task_state_lock, flags);
1216 return TMF_RESP_FUNC_COMPLETE;
1217 }
1218 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1219 if (task->slow_task == NULL) {
1220 init_completion(&slow_task.completion);
1221 task->slow_task = &slow_task;
1222 }
1223 spin_unlock_irqrestore(&task->task_state_lock, flags);
1224 if (task->task_proto & SAS_PROTOCOL_SSP) {
1225 struct scsi_cmnd *cmnd = task->uldd_task;
1226 int_to_scsilun(cmnd->device->lun, &lun);
1227 tmf_task.tmf = TMF_ABORT_TASK;
1228 tmf_task.tag_of_task_to_be_managed = tag;
1229 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1230 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1231 pm8001_dev->sas_device, 0, tag);
1232 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1233 task->task_proto & SAS_PROTOCOL_STP) {
1234 if (pm8001_ha->chip_id == chip_8006) {
1235 DECLARE_COMPLETION_ONSTACK(completion_reset);
1236 DECLARE_COMPLETION_ONSTACK(completion);
1237 struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1238
1239 /* 1. Set Device state as Recovery */
1240 pm8001_dev->setds_completion = &completion;
1241 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1242 pm8001_dev, 0x03);
1243 wait_for_completion(&completion);
1244
1245 /* 2. Send Phy Control Hard Reset */
1246 reinit_completion(&completion);
1247 phy->port_reset_status = PORT_RESET_TMO;
1248 phy->reset_success = false;
1249 phy->enable_completion = &completion;
1250 phy->reset_completion = &completion_reset;
1251 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1252 PHY_HARD_RESET);
1253 if (ret) {
1254 phy->enable_completion = NULL;
1255 phy->reset_completion = NULL;
1256 goto out;
1257 }
1258
1259 /* In the case of the reset timeout/fail we still
1260 * abort the command at the firmware. The assumption
1261 * here is that the drive is off doing something so
1262 * that it's not processing requests, and we want to
1263 * avoid getting a completion for this and either
1264 * leaking the task in libsas or losing the race and
1265 * getting a double free.
1266 */
1267 PM8001_MSG_DBG(pm8001_ha,
1268 pm8001_printk("Waiting for local phy ctl\n"));
1269 ret = wait_for_completion_timeout(&completion,
1270 PM8001_TASK_TIMEOUT * HZ);
1271 if (!ret || !phy->reset_success) {
1272 phy->enable_completion = NULL;
1273 phy->reset_completion = NULL;
1274 } else {
1275 /* 3. Wait for Port Reset complete or
1276 * Port reset TMO
1277 */
1278 PM8001_MSG_DBG(pm8001_ha,
1279 pm8001_printk("Waiting for Port reset\n"));
1280 ret = wait_for_completion_timeout(
1281 &completion_reset,
1282 PM8001_TASK_TIMEOUT * HZ);
1283 if (!ret)
1284 phy->reset_completion = NULL;
1285 WARN_ON(phy->port_reset_status ==
1286 PORT_RESET_TMO);
1287 if (phy->port_reset_status == PORT_RESET_TMO) {
1288 pm8001_dev_gone_notify(dev);
1289 goto out;
1290 }
1291 }
1292
1293 /*
1294 * 4. SATA Abort ALL
1295 * we wait for the task to be aborted so that the task
1296 * is removed from the ccb. on success the caller is
1297 * going to free the task.
1298 */
1299 ret = pm8001_exec_internal_task_abort(pm8001_ha,
1300 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1301 if (ret)
1302 goto out;
1303 ret = wait_for_completion_timeout(
1304 &task->slow_task->completion,
1305 PM8001_TASK_TIMEOUT * HZ);
1306 if (!ret)
1307 goto out;
1308
1309 /* 5. Set Device State as Operational */
1310 reinit_completion(&completion);
1311 pm8001_dev->setds_completion = &completion;
1312 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1313 pm8001_dev, 0x01);
1314 wait_for_completion(&completion);
1315 } else {
1316 rc = pm8001_exec_internal_task_abort(pm8001_ha,
1317 pm8001_dev, pm8001_dev->sas_device, 0, tag);
1318 }
1319 rc = TMF_RESP_FUNC_COMPLETE;
1320 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1321 /* SMP */
1322 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1323 pm8001_dev->sas_device, 0, tag);
1324
1325 }
1326out:
1327 spin_lock_irqsave(&task->task_state_lock, flags);
1328 if (task->slow_task == &slow_task)
1329 task->slow_task = NULL;
1330 spin_unlock_irqrestore(&task->task_state_lock, flags);
1331 if (rc != TMF_RESP_FUNC_COMPLETE)
1332 pm8001_printk("rc= %d\n", rc);
1333 return rc;
1334}
1335
1336int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1337{
1338 struct pm8001_tmf_task tmf_task;
1339
1340 tmf_task.tmf = TMF_ABORT_TASK_SET;
1341 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1342}
1343
1344int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1345{
1346 struct pm8001_tmf_task tmf_task;
1347
1348 tmf_task.tmf = TMF_CLEAR_ACA;
1349 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1350}
1351
1352int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1353{
1354 struct pm8001_tmf_task tmf_task;
1355 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1356 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1357
1358 PM8001_EH_DBG(pm8001_ha,
1359 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1360 pm8001_dev->device_id));
1361 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1362 return pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1363}
1364