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cross-tree: phase out dma_zalloc_coherent()
[linux-block.git] / drivers / scsi / pm8001 / pm8001_sas.c
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dbf9bfe6 1/*
f5860992 2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
dbf9bfe6 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
5a0e3ad6 41#include <linux/slab.h>
dbf9bfe6 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/**
ef300544 61 * pm8001_tag_free - free the no more needed tag
dbf9bfe6 62 * @pm8001_ha: our hba struct
63 * @tag: the found tag associated with the task
64 */
c6b9ef57 65void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
dbf9bfe6 66{
67 void *bitmap = pm8001_ha->tags;
ef300544 68 clear_bit(tag, bitmap);
dbf9bfe6 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{
ef300544 78 unsigned int tag;
dbf9bfe6 79 void *bitmap = pm8001_ha->tags;
646cdf00 80 unsigned long flags;
dbf9bfe6 81
646cdf00 82 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
ef300544 83 tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
646cdf00
TH		 84 if (tag >= pm8001_ha->tags_num) {
85 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
dbf9bfe6 86 return -SAS_QUEUE_FULL;
646cdf00 87 }
ef300544 88 set_bit(tag, bitmap);
646cdf00 89 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
dbf9bfe6 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)
ef300544 98 pm8001_tag_free(pm8001_ha, i);
dbf9bfe6 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;
750afb08
LC		 119 mem_virt_alloc = dma_alloc_coherent(&pdev->dev, mem_size + align,
120 &mem_dma_handle, GFP_KERNEL);
dbf9bfe6 121 if (!mem_virt_alloc) {
122 pm8001_printk("memory allocation error\n");
123 return -1;
124 }
dbf9bfe6 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 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
134 * find out our hba struct.
135 * @dev: the domain device which from sas layer.
136 */
137static
138struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
139{
140 struct sas_ha_struct *sha = dev->port->ha;
141 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
142 return pm8001_ha;
143}
144
145/**
146 * pm8001_phy_control - this function should be registered to
147 * sas_domain_function_template to provide libsas used, note: this is just
148 * control the HBA phy rather than other expander phy if you want control
149 * other phy, you should use SMP command.
150 * @sas_phy: which phy in HBA phys.
151 * @func: the operation.
152 * @funcdata: always NULL.
153 */
154int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
155 void *funcdata)
156{
157 int rc = 0, phy_id = sas_phy->id;
158 struct pm8001_hba_info *pm8001_ha = NULL;
159 struct sas_phy_linkrates *rates;
cd135754
DU		 160 struct sas_ha_struct *sas_ha;
161 struct pm8001_phy *phy;
dbf9bfe6 162 DECLARE_COMPLETION_ONSTACK(completion);
d95d0001 163 unsigned long flags;
dbf9bfe6 164 pm8001_ha = sas_phy->ha->lldd_ha;
cd135754 165 phy = &pm8001_ha->phy[phy_id];
dbf9bfe6 166 pm8001_ha->phy[phy_id].enable_completion = &completion;
167 switch (func) {
168 case PHY_FUNC_SET_LINK_RATE:
169 rates = funcdata;
170 if (rates->minimum_linkrate) {
171 pm8001_ha->phy[phy_id].minimum_linkrate =
172 rates->minimum_linkrate;
173 }
174 if (rates->maximum_linkrate) {
175 pm8001_ha->phy[phy_id].maximum_linkrate =
176 rates->maximum_linkrate;
177 }
cd135754 178 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
dbf9bfe6 179 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
180 wait_for_completion(&completion);
181 }
182 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
183 PHY_LINK_RESET);
184 break;
185 case PHY_FUNC_HARD_RESET:
cd135754 186 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
dbf9bfe6 187 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
188 wait_for_completion(&completion);
189 }
190 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
191 PHY_HARD_RESET);
192 break;
193 case PHY_FUNC_LINK_RESET:
cd135754 194 if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) {
dbf9bfe6 195 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
196 wait_for_completion(&completion);
197 }
198 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
199 PHY_LINK_RESET);
200 break;
201 case PHY_FUNC_RELEASE_SPINUP_HOLD:
202 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
203 PHY_LINK_RESET);
204 break;
205 case PHY_FUNC_DISABLE:
cd135754
DU		 206 if (pm8001_ha->chip_id != chip_8001) {
207 if (pm8001_ha->phy[phy_id].phy_state ==
208 PHY_STATE_LINK_UP_SPCV) {
209 sas_ha = pm8001_ha->sas;
210 sas_phy_disconnected(&phy->sas_phy);
211 sas_ha->notify_phy_event(&phy->sas_phy,
212 PHYE_LOSS_OF_SIGNAL);
213 phy->phy_attached = 0;
214 }
215 } else {
216 if (pm8001_ha->phy[phy_id].phy_state ==
217 PHY_STATE_LINK_UP_SPC) {
218 sas_ha = pm8001_ha->sas;
219 sas_phy_disconnected(&phy->sas_phy);
220 sas_ha->notify_phy_event(&phy->sas_phy,
221 PHYE_LOSS_OF_SIGNAL);
222 phy->phy_attached = 0;
223 }
224 }
dbf9bfe6 225 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
226 break;
d95d0001
MS		 227 case PHY_FUNC_GET_EVENTS:
228 spin_lock_irqsave(&pm8001_ha->lock, flags);
f5860992
S		 229 if (pm8001_ha->chip_id == chip_8001) {
230 if (-1 == pm8001_bar4_shift(pm8001_ha,
d95d0001 231 (phy_id < 4) ? 0x30000 : 0x40000)) {
f5860992
S		 232 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
233 return -EINVAL;
234 }
d95d0001
MS		 235 }
236 {
237 struct sas_phy *phy = sas_phy->phy;
238 uint32_t *qp = (uint32_t *)(((char *)
239 pm8001_ha->io_mem[2].memvirtaddr)
240 + 0x1034 + (0x4000 * (phy_id & 3)));
241
242 phy->invalid_dword_count = qp[0];
243 phy->running_disparity_error_count = qp[1];
244 phy->loss_of_dword_sync_count = qp[3];
245 phy->phy_reset_problem_count = qp[4];
246 }
f5860992
S		 247 if (pm8001_ha->chip_id == chip_8001)
248 pm8001_bar4_shift(pm8001_ha, 0);
d95d0001
MS		 249 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
250 return 0;
dbf9bfe6 251 default:
d95d0001 252 rc = -EOPNOTSUPP;
dbf9bfe6 253 }
254 msleep(300);
255 return rc;
256}
257
dbf9bfe6 258/**
259 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
260 * command to HBA.
261 * @shost: the scsi host data.
262 */
263void pm8001_scan_start(struct Scsi_Host *shost)
264{
265 int i;
266 struct pm8001_hba_info *pm8001_ha;
267 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
268 pm8001_ha = sha->lldd_ha;
f5860992
S		 269 /* SAS_RE_INITIALIZATION not available in SPCv/ve */
270 if (pm8001_ha->chip_id == chip_8001)
271 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
dbf9bfe6 272 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
273 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
274}
275
276int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
277{
b1124cd3
DW		 278 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
279
dbf9bfe6 280 /* give the phy enabling interrupt event time to come in (1s
281 * is empirically about all it takes) */
282 if (time < HZ)
283 return 0;
284 /* Wait for discovery to finish */
b1124cd3 285 sas_drain_work(ha);
dbf9bfe6 286 return 1;
287}
288
289/**
290 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
291 * @pm8001_ha: our hba card information
292 * @ccb: the ccb which attached to smp task
293 */
294static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
295 struct pm8001_ccb_info *ccb)
296{
297 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
298}
299
300u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
301{
302 struct ata_queued_cmd *qc = task->uldd_task;
303 if (qc) {
304 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
ef026b18
HR		 305 qc->tf.command == ATA_CMD_FPDMA_READ ||
306 qc->tf.command == ATA_CMD_FPDMA_RECV ||
661ce1f0
HR		 307 qc->tf.command == ATA_CMD_FPDMA_SEND ||
308 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
dbf9bfe6 309 *tag = qc->tag;
310 return 1;
311 }
312 }
313 return 0;
314}
315
316/**
317 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
318 * @pm8001_ha: our hba card information
319 * @ccb: the ccb which attached to sata task
320 */
321static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
322 struct pm8001_ccb_info *ccb)
323{
324 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
325}
326
327/**
328 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
329 * @pm8001_ha: our hba card information
330 * @ccb: the ccb which attached to TM
331 * @tmf: the task management IU
332 */
333static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
334 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
335{
336 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
337}
338
339/**
340 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
341 * @pm8001_ha: our hba card information
342 * @ccb: the ccb which attached to ssp task
343 */
344static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
345 struct pm8001_ccb_info *ccb)
346{
347 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
348}
11e16364 349
1cc943ae 350 /* Find the local port id that's attached to this device */
351static int sas_find_local_port_id(struct domain_device *dev)
352{
353 struct domain_device *pdev = dev->parent;
354
355 /* Directly attached device */
356 if (!pdev)
357 return dev->port->id;
358 while (pdev) {
359 struct domain_device *pdev_p = pdev->parent;
360 if (!pdev_p)
361 return pdev->port->id;
362 pdev = pdev->parent;
363 }
364 return 0;
365}
366
dbf9bfe6 367/**
97ee2088 368 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
dbf9bfe6 369 * @task: the task to be execute.
370 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
371 * we always execute one one time.
372 * @gfp_flags: gfp_flags.
97ee2088 373 * @is_tmf: if it is task management task.
dbf9bfe6 374 * @tmf: the task management IU
375 */
376#define DEV_IS_GONE(pm8001_dev) \
aa9f8328 377 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
79855d17 378static int pm8001_task_exec(struct sas_task *task,
dbf9bfe6 379 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
380{
381 struct domain_device *dev = task->dev;
382 struct pm8001_hba_info *pm8001_ha;
383 struct pm8001_device *pm8001_dev;
1cc943ae 384 struct pm8001_port *port = NULL;
dbf9bfe6 385 struct sas_task *t = task;
386 struct pm8001_ccb_info *ccb;
387 u32 tag = 0xdeadbeef, rc, n_elem = 0;
312d3e56 388 unsigned long flags = 0;
dbf9bfe6 389
390 if (!dev->port) {
391 struct task_status_struct *tsm = &t->task_status;
392 tsm->resp = SAS_TASK_UNDELIVERED;
393 tsm->stat = SAS_PHY_DOWN;
aa9f8328 394 if (dev->dev_type != SAS_SATA_DEV)
dbf9bfe6 395 t->task_done(t);
396 return 0;
397 }
398 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
72349b62
DU		 399 if (pm8001_ha->controller_fatal_error) {
400 struct task_status_struct *ts = &t->task_status;
401
402 ts->resp = SAS_TASK_UNDELIVERED;
403 t->task_done(t);
404 return 0;
405 }
dbf9bfe6 406 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
407 spin_lock_irqsave(&pm8001_ha->lock, flags);
408 do {
409 dev = t->dev;
410 pm8001_dev = dev->lldd_dev;
1cc943ae 411 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
b90b378a 412 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
1cc943ae 413 if (sas_protocol_ata(t->task_proto)) {
414 struct task_status_struct *ts = &t->task_status;
415 ts->resp = SAS_TASK_UNDELIVERED;
416 ts->stat = SAS_PHY_DOWN;
417
418 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
1cc943ae 419 t->task_done(t);
1cc943ae 420 spin_lock_irqsave(&pm8001_ha->lock, flags);
1cc943ae 421 continue;
422 } else {
423 struct task_status_struct *ts = &t->task_status;
424 ts->resp = SAS_TASK_UNDELIVERED;
425 ts->stat = SAS_PHY_DOWN;
426 t->task_done(t);
1cc943ae 427 continue;
428 }
429 }
dbf9bfe6 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;
97ee2088 443 goto err_out_tag;
dbf9bfe6 444 }
445 }
446 } else {
447 n_elem = t->num_scatter;
448 }
449
97ee2088 450 t->lldd_task = ccb;
dbf9bfe6 451 ccb->n_elem = n_elem;
452 ccb->ccb_tag = tag;
453 ccb->task = t;
aed97b8b 454 ccb->device = pm8001_dev;
dbf9bfe6 455 switch (t->task_proto) {
456 case SAS_PROTOCOL_SMP:
457 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
458 break;
459 case SAS_PROTOCOL_SSP:
460 if (is_tmf)
461 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
462 ccb, tmf);
463 else
464 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
465 break;
466 case SAS_PROTOCOL_SATA:
467 case SAS_PROTOCOL_STP:
dbf9bfe6 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 }
dbf9bfe6 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++;
79855d17 488 } while (0);
dbf9bfe6 489 rc = 0;
490 goto out_done;
491
492err_out_tag:
493 pm8001_tag_free(pm8001_ha, tag);
494err_out:
495 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
496 if (!sas_protocol_ata(t->task_proto))
497 if (n_elem)
76cb25b0 498 dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
dbf9bfe6 499 t->data_dir);
500out_done:
501 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
502 return rc;
503}
504
505/**
506 * pm8001_queue_command - register for upper layer used, all IO commands sent
507 * to HBA are from this interface.
508 * @task: the task to be execute.
dbf9bfe6 509 * @gfp_flags: gfp_flags
510 */
79855d17 511int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
dbf9bfe6 512{
79855d17 513 return pm8001_task_exec(task, gfp_flags, 0, NULL);
dbf9bfe6 514}
515
dbf9bfe6 516/**
517 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
518 * @pm8001_ha: our hba card information
519 * @ccb: the ccb which attached to ssp task
520 * @task: the task to be free.
521 * @ccb_idx: ccb index.
522 */
523void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
524 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
525{
526 if (!ccb->task)
527 return;
528 if (!sas_protocol_ata(task->task_proto))
529 if (ccb->n_elem)
530 dma_unmap_sg(pm8001_ha->dev, task->scatter,
531 task->num_scatter, task->data_dir);
532
533 switch (task->task_proto) {
534 case SAS_PROTOCOL_SMP:
535 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
f73bdebd 536 DMA_FROM_DEVICE);
dbf9bfe6 537 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
f73bdebd 538 DMA_TO_DEVICE);
dbf9bfe6 539 break;
540
541 case SAS_PROTOCOL_SATA:
542 case SAS_PROTOCOL_STP:
543 case SAS_PROTOCOL_SSP:
544 default:
545 /* do nothing */
546 break;
547 }
548 task->lldd_task = NULL;
549 ccb->task = NULL;
550 ccb->ccb_tag = 0xFFFFFFFF;
5954d738 551 ccb->open_retry = 0;
ef300544 552 pm8001_tag_free(pm8001_ha, ccb_idx);
dbf9bfe6 553}
554
555 /**
97ee2088 556 * pm8001_alloc_dev - find a empty pm8001_device
dbf9bfe6 557 * @pm8001_ha: our hba card information
558 */
7efa59e1 559static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
dbf9bfe6 560{
561 u32 dev;
562 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
aa9f8328 563 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
dbf9bfe6 564 pm8001_ha->devices[dev].id = dev;
565 return &pm8001_ha->devices[dev];
566 }
567 }
568 if (dev == PM8001_MAX_DEVICES) {
569 PM8001_FAIL_DBG(pm8001_ha,
570 pm8001_printk("max support %d devices, ignore ..\n",
571 PM8001_MAX_DEVICES));
572 }
573 return NULL;
574}
c6b9ef57
S		 575/**
576 * pm8001_find_dev - find a matching pm8001_device
577 * @pm8001_ha: our hba card information
578 */
579struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
580 u32 device_id)
581{
582 u32 dev;
583 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
584 if (pm8001_ha->devices[dev].device_id == device_id)
585 return &pm8001_ha->devices[dev];
586 }
587 if (dev == PM8001_MAX_DEVICES) {
588 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
589 "DEVICE FOUND !!!\n"));
590 }
591 return NULL;
592}
dbf9bfe6 593
594static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
595{
596 u32 id = pm8001_dev->id;
597 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
598 pm8001_dev->id = id;
aa9f8328 599 pm8001_dev->dev_type = SAS_PHY_UNUSED;
dbf9bfe6 600 pm8001_dev->device_id = PM8001_MAX_DEVICES;
601 pm8001_dev->sas_device = NULL;
602}
603
604/**
97ee2088 605 * pm8001_dev_found_notify - libsas notify a device is found.
606 * @dev: the device structure which sas layer used.
607 *
608 * when libsas find a sas domain device, it should tell the LLDD that
609 * device is found, and then LLDD register this device to HBA firmware
610 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
611 * device ID(according to device's sas address) and returned it to LLDD. From
dbf9bfe6 612 * now on, we communicate with HBA FW with the device ID which HBA assigned
3ad2f3fb 613 * rather than sas address. it is the necessary step for our HBA but it is
dbf9bfe6 614 * the optional for other HBA driver.
dbf9bfe6 615 */
616static int pm8001_dev_found_notify(struct domain_device *dev)
617{
618 unsigned long flags = 0;
619 int res = 0;
620 struct pm8001_hba_info *pm8001_ha = NULL;
621 struct domain_device *parent_dev = dev->parent;
622 struct pm8001_device *pm8001_device;
623 DECLARE_COMPLETION_ONSTACK(completion);
624 u32 flag = 0;
625 pm8001_ha = pm8001_find_ha_by_dev(dev);
626 spin_lock_irqsave(&pm8001_ha->lock, flags);
627
628 pm8001_device = pm8001_alloc_dev(pm8001_ha);
dbf9bfe6 629 if (!pm8001_device) {
630 res = -1;
631 goto found_out;
632 }
f01f4e6a 633 pm8001_device->sas_device = dev;
dbf9bfe6 634 dev->lldd_dev = pm8001_device;
635 pm8001_device->dev_type = dev->dev_type;
636 pm8001_device->dcompletion = &completion;
637 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
638 int phy_id;
639 struct ex_phy *phy;
640 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
641 phy_id++) {
642 phy = &parent_dev->ex_dev.ex_phy[phy_id];
643 if (SAS_ADDR(phy->attached_sas_addr)
644 == SAS_ADDR(dev->sas_addr)) {
645 pm8001_device->attached_phy = phy_id;
646 break;
647 }
648 }
649 if (phy_id == parent_dev->ex_dev.num_phys) {
650 PM8001_FAIL_DBG(pm8001_ha,
651 pm8001_printk("Error: no attached dev:%016llx"
652 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
653 SAS_ADDR(parent_dev->sas_addr)));
654 res = -1;
655 }
656 } else {
aa9f8328 657 if (dev->dev_type == SAS_SATA_DEV) {
dbf9bfe6 658 pm8001_device->attached_phy =
659 dev->rphy->identify.phy_identifier;
660 flag = 1; /* directly sata*/
661 }
662 } /*register this device to HBA*/
6fbc7692 663 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
dbf9bfe6 664 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
665 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
666 wait_for_completion(&completion);
aa9f8328 667 if (dev->dev_type == SAS_END_DEVICE)
dbf9bfe6 668 msleep(50);
5c4fb76a 669 pm8001_ha->flags = PM8001F_RUN_TIME;
dbf9bfe6 670 return 0;
671found_out:
672 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
673 return res;
674}
675
676int pm8001_dev_found(struct domain_device *dev)
677{
678 return pm8001_dev_found_notify(dev);
679}
680
c6b9ef57 681void pm8001_task_done(struct sas_task *task)
dbf9bfe6 682{
f0bf750c 683 if (!del_timer(&task->slow_task->timer))
dbf9bfe6 684 return;
f0bf750c 685 complete(&task->slow_task->completion);
dbf9bfe6 686}
687
77570eed 688static void pm8001_tmf_timedout(struct timer_list *t)
dbf9bfe6 689{
77570eed
KC		 690 struct sas_task_slow *slow = from_timer(slow, t, timer);
691 struct sas_task *task = slow->task;
dbf9bfe6 692
693 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
f0bf750c 694 complete(&task->slow_task->completion);
dbf9bfe6 695}
696
697#define PM8001_TASK_TIMEOUT 20
698/**
97ee2088 699 * pm8001_exec_internal_tmf_task - execute some task management commands.
dbf9bfe6 700 * @dev: the wanted device.
701 * @tmf: which task management wanted to be take.
702 * @para_len: para_len.
703 * @parameter: ssp task parameter.
97ee2088 704 *
705 * when errors or exception happened, we may want to do something, for example
706 * abort the issued task which result in this execption, it is done by calling
707 * this function, note it is also with the task execute interface.
dbf9bfe6 708 */
709static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
710 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
711{
712 int res, retry;
713 struct sas_task *task = NULL;
714 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
e912457b
AKS		 715 struct pm8001_device *pm8001_dev = dev->lldd_dev;
716 DECLARE_COMPLETION_ONSTACK(completion_setstate);
dbf9bfe6 717
718 for (retry = 0; retry < 3; retry++) {
f0bf750c 719 task = sas_alloc_slow_task(GFP_KERNEL);
dbf9bfe6 720 if (!task)
721 return -ENOMEM;
722
723 task->dev = dev;
724 task->task_proto = dev->tproto;
725 memcpy(&task->ssp_task, parameter, para_len);
726 task->task_done = pm8001_task_done;
841b86f3 727 task->slow_task->timer.function = pm8001_tmf_timedout;
f0bf750c
DW		 728 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
729 add_timer(&task->slow_task->timer);
dbf9bfe6 730
79855d17 731 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
dbf9bfe6 732
733 if (res) {
f0bf750c 734 del_timer(&task->slow_task->timer);
dbf9bfe6 735 PM8001_FAIL_DBG(pm8001_ha,
736 pm8001_printk("Executing internal task "
737 "failed\n"));
738 goto ex_err;
739 }
f0bf750c 740 wait_for_completion(&task->slow_task->completion);
e912457b
AKS		 741 if (pm8001_ha->chip_id != chip_8001) {
742 pm8001_dev->setds_completion = &completion_setstate;
743 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
744 pm8001_dev, 0x01);
745 wait_for_completion(&completion_setstate);
746 }
dbf9bfe6 747 res = -TMF_RESP_FUNC_FAILED;
748 /* Even TMF timed out, return direct. */
749 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
750 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
751 PM8001_FAIL_DBG(pm8001_ha,
752 pm8001_printk("TMF task[%x]timeout.\n",
753 tmf->tmf));
754 goto ex_err;
755 }
756 }
757
758 if (task->task_status.resp == SAS_TASK_COMPLETE &&
df64d3ca 759 task->task_status.stat == SAM_STAT_GOOD) {
dbf9bfe6 760 res = TMF_RESP_FUNC_COMPLETE;
761 break;
762 }
763
764 if (task->task_status.resp == SAS_TASK_COMPLETE &&
765 task->task_status.stat == SAS_DATA_UNDERRUN) {
766 /* no error, but return the number of bytes of
767 * underrun */
768 res = task->task_status.residual;
769 break;
770 }
771
772 if (task->task_status.resp == SAS_TASK_COMPLETE &&
773 task->task_status.stat == SAS_DATA_OVERRUN) {
774 PM8001_FAIL_DBG(pm8001_ha,
775 pm8001_printk("Blocked task error.\n"));
776 res = -EMSGSIZE;
777 break;
778 } else {
97ee2088 779 PM8001_EH_DBG(pm8001_ha,
780 pm8001_printk(" Task to dev %016llx response:"
781 "0x%x status 0x%x\n",
dbf9bfe6 782 SAS_ADDR(dev->sas_addr),
783 task->task_status.resp,
784 task->task_status.stat));
4fcf812c 785 sas_free_task(task);
dbf9bfe6 786 task = NULL;
787 }
788 }
789ex_err:
790 BUG_ON(retry == 3 && task != NULL);
4fcf812c 791 sas_free_task(task);
dbf9bfe6 792 return res;
793}
794
795static int
796pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
797 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
798 u32 task_tag)
799{
800 int res, retry;
97ee2088 801 u32 ccb_tag;
dbf9bfe6 802 struct pm8001_ccb_info *ccb;
803 struct sas_task *task = NULL;
804
805 for (retry = 0; retry < 3; retry++) {
f0bf750c 806 task = sas_alloc_slow_task(GFP_KERNEL);
dbf9bfe6 807 if (!task)
808 return -ENOMEM;
809
810 task->dev = dev;
811 task->task_proto = dev->tproto;
812 task->task_done = pm8001_task_done;
841b86f3 813 task->slow_task->timer.function = pm8001_tmf_timedout;
f0bf750c
DW		 814 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
815 add_timer(&task->slow_task->timer);
dbf9bfe6 816
97ee2088 817 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
818 if (res)
819 return res;
dbf9bfe6 820 ccb = &pm8001_ha->ccb_info[ccb_tag];
821 ccb->device = pm8001_dev;
822 ccb->ccb_tag = ccb_tag;
823 ccb->task = task;
3b700e34 824 ccb->n_elem = 0;
dbf9bfe6 825
826 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
827 pm8001_dev, flag, task_tag, ccb_tag);
828
829 if (res) {
f0bf750c 830 del_timer(&task->slow_task->timer);
dbf9bfe6 831 PM8001_FAIL_DBG(pm8001_ha,
832 pm8001_printk("Executing internal task "
833 "failed\n"));
834 goto ex_err;
835 }
f0bf750c 836 wait_for_completion(&task->slow_task->completion);
dbf9bfe6 837 res = TMF_RESP_FUNC_FAILED;
838 /* Even TMF timed out, return direct. */
839 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
840 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
841 PM8001_FAIL_DBG(pm8001_ha,
842 pm8001_printk("TMF task timeout.\n"));
843 goto ex_err;
844 }
845 }
846
847 if (task->task_status.resp == SAS_TASK_COMPLETE &&
df64d3ca 848 task->task_status.stat == SAM_STAT_GOOD) {
dbf9bfe6 849 res = TMF_RESP_FUNC_COMPLETE;
850 break;
851
852 } else {
97ee2088 853 PM8001_EH_DBG(pm8001_ha,
dbf9bfe6 854 pm8001_printk(" Task to dev %016llx response: "
855 "0x%x status 0x%x\n",
856 SAS_ADDR(dev->sas_addr),
857 task->task_status.resp,
858 task->task_status.stat));
4fcf812c 859 sas_free_task(task);
dbf9bfe6 860 task = NULL;
861 }
862 }
863ex_err:
864 BUG_ON(retry == 3 && task != NULL);
4fcf812c 865 sas_free_task(task);
dbf9bfe6 866 return res;
867}
868
869/**
870 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
871 * @dev: the device structure which sas layer used.
872 */
873static void pm8001_dev_gone_notify(struct domain_device *dev)
874{
875 unsigned long flags = 0;
dbf9bfe6 876 struct pm8001_hba_info *pm8001_ha;
877 struct pm8001_device *pm8001_dev = dev->lldd_dev;
2471b894 878
dbf9bfe6 879 pm8001_ha = pm8001_find_ha_by_dev(dev);
880 spin_lock_irqsave(&pm8001_ha->lock, flags);
dbf9bfe6 881 if (pm8001_dev) {
2471b894
DC		 882 u32 device_id = pm8001_dev->device_id;
883
dbf9bfe6 884 PM8001_DISC_DBG(pm8001_ha,
885 pm8001_printk("found dev[%d:%x] is gone.\n",
886 pm8001_dev->device_id, pm8001_dev->dev_type));
887 if (pm8001_dev->running_req) {
888 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
889 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
890 dev, 1, 0);
891 spin_lock_irqsave(&pm8001_ha->lock, flags);
892 }
893 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
894 pm8001_free_dev(pm8001_dev);
895 } else {
896 PM8001_DISC_DBG(pm8001_ha,
897 pm8001_printk("Found dev has gone.\n"));
898 }
899 dev->lldd_dev = NULL;
900 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
901}
902
903void pm8001_dev_gone(struct domain_device *dev)
904{
905 pm8001_dev_gone_notify(dev);
906}
907
908static int pm8001_issue_ssp_tmf(struct domain_device *dev,
909 u8 *lun, struct pm8001_tmf_task *tmf)
910{
911 struct sas_ssp_task ssp_task;
912 if (!(dev->tproto & SAS_PROTOCOL_SSP))
913 return TMF_RESP_FUNC_ESUPP;
914
915 strncpy((u8 *)&ssp_task.LUN, lun, 8);
916 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
917 tmf);
918}
919
5954d738
MS		 920/* retry commands by ha, by task and/or by device */
921void pm8001_open_reject_retry(
922 struct pm8001_hba_info *pm8001_ha,
923 struct sas_task *task_to_close,
924 struct pm8001_device *device_to_close)
925{
926 int i;
927 unsigned long flags;
928
929 if (pm8001_ha == NULL)
930 return;
931
932 spin_lock_irqsave(&pm8001_ha->lock, flags);
933
934 for (i = 0; i < PM8001_MAX_CCB; i++) {
935 struct sas_task *task;
936 struct task_status_struct *ts;
937 struct pm8001_device *pm8001_dev;
938 unsigned long flags1;
939 u32 tag;
940 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
941
942 pm8001_dev = ccb->device;
aa9f8328 943 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
5954d738
MS		 944 continue;
945 if (!device_to_close) {
946 uintptr_t d = (uintptr_t)pm8001_dev
947 - (uintptr_t)&pm8001_ha->devices;
948 if (((d % sizeof(*pm8001_dev)) != 0)
949 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
950 continue;
951 } else if (pm8001_dev != device_to_close)
952 continue;
953 tag = ccb->ccb_tag;
954 if (!tag || (tag == 0xFFFFFFFF))
955 continue;
956 task = ccb->task;
957 if (!task || !task->task_done)
958 continue;
959 if (task_to_close && (task != task_to_close))
960 continue;
961 ts = &task->task_status;
962 ts->resp = SAS_TASK_COMPLETE;
963 /* Force the midlayer to retry */
964 ts->stat = SAS_OPEN_REJECT;
965 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
966 if (pm8001_dev)
967 pm8001_dev->running_req--;
968 spin_lock_irqsave(&task->task_state_lock, flags1);
969 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
970 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
971 task->task_state_flags |= SAS_TASK_STATE_DONE;
972 if (unlikely((task->task_state_flags
973 & SAS_TASK_STATE_ABORTED))) {
974 spin_unlock_irqrestore(&task->task_state_lock,
975 flags1);
976 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
977 } else {
978 spin_unlock_irqrestore(&task->task_state_lock,
979 flags1);
980 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
981 mb();/* in order to force CPU ordering */
982 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
983 task->task_done(task);
984 spin_lock_irqsave(&pm8001_ha->lock, flags);
985 }
986 }
987
988 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
989}
990
dbf9bfe6 991/**
992 * Standard mandates link reset for ATA (type 0) and hard reset for
993 * SSP (type 1) , only for RECOVERY
994 */
995int pm8001_I_T_nexus_reset(struct domain_device *dev)
996{
997 int rc = TMF_RESP_FUNC_FAILED;
998 struct pm8001_device *pm8001_dev;
999 struct pm8001_hba_info *pm8001_ha;
1000 struct sas_phy *phy;
e7db8229 1001
dbf9bfe6 1002 if (!dev || !dev->lldd_dev)
e7db8229 1003 return -ENODEV;
dbf9bfe6 1004
1005 pm8001_dev = dev->lldd_dev;
1006 pm8001_ha = pm8001_find_ha_by_dev(dev);
f41a0c44 1007 phy = sas_get_local_phy(dev);
dbf9bfe6 1008
1009 if (dev_is_sata(dev)) {
f41a0c44
DW		 1010 if (scsi_is_sas_phy_local(phy)) {
1011 rc = 0;
1012 goto out;
1013 }
dbf9bfe6 1014 rc = sas_phy_reset(phy, 1);
3a1ae967
V		 1015 if (rc) {
1016 PM8001_EH_DBG(pm8001_ha,
1017 pm8001_printk("phy reset failed for device %x\n"
1018 "with rc %d\n", pm8001_dev->device_id, rc));
1019 rc = TMF_RESP_FUNC_FAILED;
1020 goto out;
1021 }
dbf9bfe6 1022 msleep(2000);
1023 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1024 dev, 1, 0);
3a1ae967
V		 1025 if (rc) {
1026 PM8001_EH_DBG(pm8001_ha,
1027 pm8001_printk("task abort failed %x\n"
1028 "with rc %d\n", pm8001_dev->device_id, rc));
1029 rc = TMF_RESP_FUNC_FAILED;
1030 }
f41a0c44
DW		 1031 } else {
1032 rc = sas_phy_reset(phy, 1);
1033 msleep(2000);
dbf9bfe6 1034 }
1035 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1036 pm8001_dev->device_id, rc));
f41a0c44
DW		 1037 out:
1038 sas_put_local_phy(phy);
dbf9bfe6 1039 return rc;
1040}
1041
a6cb3d01
S		 1042/*
1043* This function handle the IT_NEXUS_XXX event or completion
1044* status code for SSP/SATA/SMP I/O request.
1045*/
1046int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1047{
1048 int rc = TMF_RESP_FUNC_FAILED;
1049 struct pm8001_device *pm8001_dev;
1050 struct pm8001_hba_info *pm8001_ha;
1051 struct sas_phy *phy;
a6cb3d01
S		 1052
1053 if (!dev || !dev->lldd_dev)
1054 return -1;
1055
1056 pm8001_dev = dev->lldd_dev;
a6cb3d01
S		 1057 pm8001_ha = pm8001_find_ha_by_dev(dev);
1058
1059 PM8001_EH_DBG(pm8001_ha,
1060 pm8001_printk("I_T_Nexus handler invoked !!"));
1061
1062 phy = sas_get_local_phy(dev);
1063
1064 if (dev_is_sata(dev)) {
1065 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1066 if (scsi_is_sas_phy_local(phy)) {
1067 rc = 0;
1068 goto out;
1069 }
1070 /* send internal ssp/sata/smp abort command to FW */
1071 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1072 dev, 1, 0);
1073 msleep(100);
1074
1075 /* deregister the target device */
1076 pm8001_dev_gone_notify(dev);
1077 msleep(200);
1078
1079 /*send phy reset to hard reset target */
1080 rc = sas_phy_reset(phy, 1);
1081 msleep(2000);
1082 pm8001_dev->setds_completion = &completion_setstate;
1083
1084 wait_for_completion(&completion_setstate);
1085 } else {
1086 /* send internal ssp/sata/smp abort command to FW */
1087 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1088 dev, 1, 0);
1089 msleep(100);
1090
1091 /* deregister the target device */
1092 pm8001_dev_gone_notify(dev);
1093 msleep(200);
1094
1095 /*send phy reset to hard reset target */
1096 rc = sas_phy_reset(phy, 1);
1097 msleep(2000);
1098 }
1099 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1100 pm8001_dev->device_id, rc));
1101out:
1102 sas_put_local_phy(phy);
1103
1104 return rc;
1105}
dbf9bfe6 1106/* mandatory SAM-3, the task reset the specified LUN*/
1107int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1108{
1109 int rc = TMF_RESP_FUNC_FAILED;
1110 struct pm8001_tmf_task tmf_task;
1111 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1112 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
34a9b81b 1113 DECLARE_COMPLETION_ONSTACK(completion_setstate);
dbf9bfe6 1114 if (dev_is_sata(dev)) {
f41a0c44 1115 struct sas_phy *phy = sas_get_local_phy(dev);
dbf9bfe6 1116 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1117 dev, 1, 0);
1118 rc = sas_phy_reset(phy, 1);
f41a0c44 1119 sas_put_local_phy(phy);
34a9b81b 1120 pm8001_dev->setds_completion = &completion_setstate;
dbf9bfe6 1121 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1122 pm8001_dev, 0x01);
34a9b81b 1123 wait_for_completion(&completion_setstate);
dbf9bfe6 1124 } else {
1125 tmf_task.tmf = TMF_LU_RESET;
1126 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1127 }
1128 /* If failed, fall-through I_T_Nexus reset */
1129 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1130 pm8001_dev->device_id, rc));
1131 return rc;
1132}
1133
1134/* optional SAM-3 */
1135int pm8001_query_task(struct sas_task *task)
1136{
1137 u32 tag = 0xdeadbeef;
1138 int i = 0;
1139 struct scsi_lun lun;
1140 struct pm8001_tmf_task tmf_task;
1141 int rc = TMF_RESP_FUNC_FAILED;
1142 if (unlikely(!task || !task->lldd_task || !task->dev))
1143 return rc;
1144
1145 if (task->task_proto & SAS_PROTOCOL_SSP) {
1146 struct scsi_cmnd *cmnd = task->uldd_task;
1147 struct domain_device *dev = task->dev;
1148 struct pm8001_hba_info *pm8001_ha =
1149 pm8001_find_ha_by_dev(dev);
1150
1151 int_to_scsilun(cmnd->device->lun, &lun);
1152 rc = pm8001_find_tag(task, &tag);
1153 if (rc == 0) {
1154 rc = TMF_RESP_FUNC_FAILED;
1155 return rc;
1156 }
1157 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1158 for (i = 0; i < 16; i++)
1159 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1160 printk(KERN_INFO "]\n");
1161 tmf_task.tmf = TMF_QUERY_TASK;
1162 tmf_task.tag_of_task_to_be_managed = tag;
1163
1164 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1165 switch (rc) {
1166 /* The task is still in Lun, release it then */
1167 case TMF_RESP_FUNC_SUCC:
1168 PM8001_EH_DBG(pm8001_ha,
6fbc7692
MS		 1169 pm8001_printk("The task is still in Lun\n"));
1170 break;
dbf9bfe6 1171 /* The task is not in Lun or failed, reset the phy */
1172 case TMF_RESP_FUNC_FAILED:
1173 case TMF_RESP_FUNC_COMPLETE:
1174 PM8001_EH_DBG(pm8001_ha,
1175 pm8001_printk("The task is not in Lun or failed,"
6fbc7692 1176 " reset the phy\n"));
dbf9bfe6 1177 break;
1178 }
1179 }
1180 pm8001_printk(":rc= %d\n", rc);
1181 return rc;
1182}
1183
1184/* mandatory SAM-3, still need free task/ccb info, abord the specified task */
1185int pm8001_abort_task(struct sas_task *task)
1186{
1187 unsigned long flags;
1db49906 1188 u32 tag;
dbf9bfe6 1189 struct domain_device *dev ;
1db49906 1190 struct pm8001_hba_info *pm8001_ha;
dbf9bfe6 1191 struct scsi_lun lun;
1192 struct pm8001_device *pm8001_dev;
1193 struct pm8001_tmf_task tmf_task;
869ddbdc
V		 1194 int rc = TMF_RESP_FUNC_FAILED, ret;
1195 u32 phy_id;
1196 struct sas_task_slow slow_task;
dbf9bfe6 1197 if (unlikely(!task || !task->lldd_task || !task->dev))
1db49906
V		 1198 return TMF_RESP_FUNC_FAILED;
1199 dev = task->dev;
1200 pm8001_dev = dev->lldd_dev;
1201 pm8001_ha = pm8001_find_ha_by_dev(dev);
869ddbdc 1202 phy_id = pm8001_dev->attached_phy;
1db49906
V		 1203 rc = pm8001_find_tag(task, &tag);
1204 if (rc == 0) {
1205 pm8001_printk("no tag for task:%p\n", task);
1206 return TMF_RESP_FUNC_FAILED;
1207 }
dbf9bfe6 1208 spin_lock_irqsave(&task->task_state_lock, flags);
1209 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1210 spin_unlock_irqrestore(&task->task_state_lock, flags);
1db49906 1211 return TMF_RESP_FUNC_COMPLETE;
dbf9bfe6 1212 }
869ddbdc
V		 1213 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1214 if (task->slow_task == NULL) {
1215 init_completion(&slow_task.completion);
1216 task->slow_task = &slow_task;
dbf9bfe6 1217 }
1218 spin_unlock_irqrestore(&task->task_state_lock, flags);
1219 if (task->task_proto & SAS_PROTOCOL_SSP) {
1220 struct scsi_cmnd *cmnd = task->uldd_task;
dbf9bfe6 1221 int_to_scsilun(cmnd->device->lun, &lun);
97ee2088 1222 tmf_task.tmf = TMF_ABORT_TASK;
dbf9bfe6 1223 tmf_task.tag_of_task_to_be_managed = tag;
1224 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
97ee2088 1225 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
dbf9bfe6 1226 pm8001_dev->sas_device, 0, tag);
1227 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1228 task->task_proto & SAS_PROTOCOL_STP) {
869ddbdc
V		 1229 if (pm8001_ha->chip_id == chip_8006) {
1230 DECLARE_COMPLETION_ONSTACK(completion_reset);
1231 DECLARE_COMPLETION_ONSTACK(completion);
1232 struct pm8001_phy *phy = pm8001_ha->phy + phy_id;
1233
1234 /* 1. Set Device state as Recovery */
1235 pm8001_dev->setds_completion = &completion;
1236 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1237 pm8001_dev, 0x03);
1238 wait_for_completion(&completion);
1239
1240 /* 2. Send Phy Control Hard Reset */
1241 reinit_completion(&completion);
1242 phy->reset_success = false;
1243 phy->enable_completion = &completion;
1244 phy->reset_completion = &completion_reset;
1245 ret = PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
1246 PHY_HARD_RESET);
1247 if (ret)
1248 goto out;
1249 PM8001_MSG_DBG(pm8001_ha,
1250 pm8001_printk("Waiting for local phy ctl\n"));
1251 wait_for_completion(&completion);
1252 if (!phy->reset_success)
1253 goto out;
1254
1255 /* 3. Wait for Port Reset complete / Port reset TMO */
1256 PM8001_MSG_DBG(pm8001_ha,
1257 pm8001_printk("Waiting for Port reset\n"));
1258 wait_for_completion(&completion_reset);
1259 if (phy->port_reset_status)
1260 goto out;
1261
1262 /*
1263 * 4. SATA Abort ALL
1264 * we wait for the task to be aborted so that the task
1265 * is removed from the ccb. on success the caller is
1266 * going to free the task.
1267 */
1268 ret = pm8001_exec_internal_task_abort(pm8001_ha,
1269 pm8001_dev, pm8001_dev->sas_device, 1, tag);
1270 if (ret)
1271 goto out;
1272 ret = wait_for_completion_timeout(
1273 &task->slow_task->completion,
1274 PM8001_TASK_TIMEOUT * HZ);
1275 if (!ret)
1276 goto out;
1277
1278 /* 5. Set Device State as Operational */
1279 reinit_completion(&completion);
1280 pm8001_dev->setds_completion = &completion;
1281 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1282 pm8001_dev, 0x01);
1283 wait_for_completion(&completion);
1284 } else {
1285 rc = pm8001_exec_internal_task_abort(pm8001_ha,
1286 pm8001_dev, pm8001_dev->sas_device, 0, tag);
dbf9bfe6 1287 }
869ddbdc 1288 rc = TMF_RESP_FUNC_COMPLETE;
dbf9bfe6 1289 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1290 /* SMP */
dbf9bfe6 1291 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1292 pm8001_dev->sas_device, 0, tag);
1293
1294 }
1295out:
869ddbdc
V		 1296 spin_lock_irqsave(&task->task_state_lock, flags);
1297 if (task->slow_task == &slow_task)
1298 task->slow_task = NULL;
1299 spin_unlock_irqrestore(&task->task_state_lock, flags);
dbf9bfe6 1300 if (rc != TMF_RESP_FUNC_COMPLETE)
1301 pm8001_printk("rc= %d\n", rc);
1302 return rc;
1303}
1304
1305int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1306{
1307 int rc = TMF_RESP_FUNC_FAILED;
1308 struct pm8001_tmf_task tmf_task;
1309
1310 tmf_task.tmf = TMF_ABORT_TASK_SET;
1311 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1312 return rc;
1313}
1314
1315int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1316{
1317 int rc = TMF_RESP_FUNC_FAILED;
1318 struct pm8001_tmf_task tmf_task;
1319
1320 tmf_task.tmf = TMF_CLEAR_ACA;
1321 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1322
1323 return rc;
1324}
1325
1326int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1327{
1328 int rc = TMF_RESP_FUNC_FAILED;
1329 struct pm8001_tmf_task tmf_task;
1330 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1331 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1332
1333 PM8001_EH_DBG(pm8001_ha,
1334 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1335 pm8001_dev->device_id));
1336 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1337 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1338 return rc;
1339}
1340
Linux 6.x block layer and io_uring tree(s)