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Linux 5.9.7
[linux/fpc-iii.git] / drivers / scsi / pm8001 / pm8001_sas.c
blob9889bab7d31c1ca60cc2b14347d31a2c3b0c1c85
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 */
49 static 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 */
65 void 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 */
76 inline 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
94 void 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 */
109 int 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 */
138 static
139 struct 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 */
155 int 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 */
266 void 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
279 int 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 */
297 static 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
303 u32 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 */
324 static 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 */
336 static 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 */
347 static 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 */
354 static 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 */
379 static 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
493 err_out_tag:
494 pm8001_tag_free(pm8001_ha, tag);
495 err_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);
501 out_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 */
512 int 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 */
524 void 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 */
560 static 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 */
581 struct 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
596 static 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 */
618 static 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;
673 found_out:
674 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
675 return res;
676 }
677
678 int pm8001_dev_found(struct domain_device *dev)
679 {
680 return pm8001_dev_found_notify(dev);
681 }
682
683 void 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
690 static 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 */
711 static 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 }
791 ex_err:
792 BUG_ON(retry == 3 && task != NULL);
793 sas_free_task(task);
794 return res;
795 }
796
797 static int
798 pm8001_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 }
865 ex_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 */
875 static 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
907 void pm8001_dev_gone(struct domain_device *dev)
908 {
909 pm8001_dev_gone_notify(dev);
910 }
911
912 static 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 */
925 void 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 */
1000 int 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 */
1051 int 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));
1106 out:
1107 sas_put_local_phy(phy);
1108
1109 return rc;
1110 }
1111 /* mandatory SAM-3, the task reset the specified LUN*/
1112 int 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 */
1140 int 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 */
1190 int 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 }
1326 out:
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
1336 int 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
1344 int 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
1352 int 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
Linux with added FPC-III support