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Diffstat (limited to 'drivers/scsi/pm8001/pm8001_sas.c')
-rw-r--r--drivers/scsi/pm8001/pm8001_sas.c1104
1 files changed, 1104 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
new file mode 100644
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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 "pm8001_sas.h"
42
43/**
44 * pm8001_find_tag - from sas task to find out tag that belongs to this task
45 * @task: the task sent to the LLDD
46 * @tag: the found tag associated with the task
47 */
48static int pm8001_find_tag(struct sas_task *task, u32 *tag)
49{
50 if (task->lldd_task) {
51 struct pm8001_ccb_info *ccb;
52 ccb = task->lldd_task;
53 *tag = ccb->ccb_tag;
54 return 1;
55 }
56 return 0;
57}
58
59/**
60 * pm8001_tag_clear - clear the tags bitmap
61 * @pm8001_ha: our hba struct
62 * @tag: the found tag associated with the task
63 */
64static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag)
65{
66 void *bitmap = pm8001_ha->tags;
67 clear_bit(tag, bitmap);
68}
69
70static void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
71{
72 pm8001_tag_clear(pm8001_ha, tag);
73}
74
75static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
76{
77 void *bitmap = pm8001_ha->tags;
78 set_bit(tag, bitmap);
79}
80
81/**
82 * pm8001_tag_alloc - allocate a empty tag for task used.
83 * @pm8001_ha: our hba struct
84 * @tag_out: the found empty tag .
85 */
86inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
87{
88 unsigned int index, tag;
89 void *bitmap = pm8001_ha->tags;
90
91 index = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
92 tag = index;
93 if (tag >= pm8001_ha->tags_num)
94 return -SAS_QUEUE_FULL;
95 pm8001_tag_set(pm8001_ha, tag);
96 *tag_out = tag;
97 return 0;
98}
99
100void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
101{
102 int i;
103 for (i = 0; i < pm8001_ha->tags_num; ++i)
104 pm8001_tag_clear(pm8001_ha, i);
105}
106
107 /**
108 * pm8001_mem_alloc - allocate memory for pm8001.
109 * @pdev: pci device.
110 * @virt_addr: the allocated virtual address
111 * @pphys_addr_hi: the physical address high byte address.
112 * @pphys_addr_lo: the physical address low byte address.
113 * @mem_size: memory size.
114 */
115int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
116 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
117 u32 *pphys_addr_lo, u32 mem_size, u32 align)
118{
119 caddr_t mem_virt_alloc;
120 dma_addr_t mem_dma_handle;
121 u64 phys_align;
122 u64 align_offset = 0;
123 if (align)
124 align_offset = (dma_addr_t)align - 1;
125 mem_virt_alloc =
126 pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
127 if (!mem_virt_alloc) {
128 pm8001_printk("memory allocation error\n");
129 return -1;
130 }
131 memset((void *)mem_virt_alloc, 0, mem_size+align);
132 *pphys_addr = mem_dma_handle;
133 phys_align = (*pphys_addr + align_offset) & ~align_offset;
134 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
135 *pphys_addr_hi = upper_32_bits(phys_align);
136 *pphys_addr_lo = lower_32_bits(phys_align);
137 return 0;
138}
139/**
140 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
141 * find out our hba struct.
142 * @dev: the domain device which from sas layer.
143 */
144static
145struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
146{
147 struct sas_ha_struct *sha = dev->port->ha;
148 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
149 return pm8001_ha;
150}
151
152/**
153 * pm8001_phy_control - this function should be registered to
154 * sas_domain_function_template to provide libsas used, note: this is just
155 * control the HBA phy rather than other expander phy if you want control
156 * other phy, you should use SMP command.
157 * @sas_phy: which phy in HBA phys.
158 * @func: the operation.
159 * @funcdata: always NULL.
160 */
161int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
162 void *funcdata)
163{
164 int rc = 0, phy_id = sas_phy->id;
165 struct pm8001_hba_info *pm8001_ha = NULL;
166 struct sas_phy_linkrates *rates;
167 DECLARE_COMPLETION_ONSTACK(completion);
168 pm8001_ha = sas_phy->ha->lldd_ha;
169 pm8001_ha->phy[phy_id].enable_completion = &completion;
170 switch (func) {
171 case PHY_FUNC_SET_LINK_RATE:
172 rates = funcdata;
173 if (rates->minimum_linkrate) {
174 pm8001_ha->phy[phy_id].minimum_linkrate =
175 rates->minimum_linkrate;
176 }
177 if (rates->maximum_linkrate) {
178 pm8001_ha->phy[phy_id].maximum_linkrate =
179 rates->maximum_linkrate;
180 }
181 if (pm8001_ha->phy[phy_id].phy_state == 0) {
182 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
183 wait_for_completion(&completion);
184 }
185 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
186 PHY_LINK_RESET);
187 break;
188 case PHY_FUNC_HARD_RESET:
189 if (pm8001_ha->phy[phy_id].phy_state == 0) {
190 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
191 wait_for_completion(&completion);
192 }
193 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
194 PHY_HARD_RESET);
195 break;
196 case PHY_FUNC_LINK_RESET:
197 if (pm8001_ha->phy[phy_id].phy_state == 0) {
198 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
199 wait_for_completion(&completion);
200 }
201 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
202 PHY_LINK_RESET);
203 break;
204 case PHY_FUNC_RELEASE_SPINUP_HOLD:
205 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
206 PHY_LINK_RESET);
207 break;
208 case PHY_FUNC_DISABLE:
209 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
210 break;
211 default:
212 rc = -EOPNOTSUPP;
213 }
214 msleep(300);
215 return rc;
216}
217
218int pm8001_slave_alloc(struct scsi_device *scsi_dev)
219{
220 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
221 if (dev_is_sata(dev)) {
222 /* We don't need to rescan targets
223 * if REPORT_LUNS request is failed
224 */
225 if (scsi_dev->lun > 0)
226 return -ENXIO;
227 scsi_dev->tagged_supported = 1;
228 }
229 return sas_slave_alloc(scsi_dev);
230}
231
232/**
233 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
234 * command to HBA.
235 * @shost: the scsi host data.
236 */
237void pm8001_scan_start(struct Scsi_Host *shost)
238{
239 int i;
240 struct pm8001_hba_info *pm8001_ha;
241 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
242 pm8001_ha = sha->lldd_ha;
243 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
244 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
245}
246
247int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
248{
249 /* give the phy enabling interrupt event time to come in (1s
250 * is empirically about all it takes) */
251 if (time < HZ)
252 return 0;
253 /* Wait for discovery to finish */
254 scsi_flush_work(shost);
255 return 1;
256}
257
258/**
259 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
260 * @pm8001_ha: our hba card information
261 * @ccb: the ccb which attached to smp task
262 */
263static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
264 struct pm8001_ccb_info *ccb)
265{
266 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
267}
268
269u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
270{
271 struct ata_queued_cmd *qc = task->uldd_task;
272 if (qc) {
273 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
274 qc->tf.command == ATA_CMD_FPDMA_READ) {
275 *tag = qc->tag;
276 return 1;
277 }
278 }
279 return 0;
280}
281
282/**
283 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
284 * @pm8001_ha: our hba card information
285 * @ccb: the ccb which attached to sata task
286 */
287static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
288 struct pm8001_ccb_info *ccb)
289{
290 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
291}
292
293/**
294 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
295 * @pm8001_ha: our hba card information
296 * @ccb: the ccb which attached to TM
297 * @tmf: the task management IU
298 */
299static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
300 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
301{
302 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
303}
304
305/**
306 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
307 * @pm8001_ha: our hba card information
308 * @ccb: the ccb which attached to ssp task
309 */
310static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
311 struct pm8001_ccb_info *ccb)
312{
313 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
314}
315int pm8001_slave_configure(struct scsi_device *sdev)
316{
317 struct domain_device *dev = sdev_to_domain_dev(sdev);
318 int ret = sas_slave_configure(sdev);
319 if (ret)
320 return ret;
321 if (dev_is_sata(dev)) {
322 #ifdef PM8001_DISABLE_NCQ
323 struct ata_port *ap = dev->sata_dev.ap;
324 struct ata_device *adev = ap->link.device;
325 adev->flags |= ATA_DFLAG_NCQ_OFF;
326 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1);
327 #endif
328 }
329 return 0;
330}
331/**
332 * pm8001_task_exec -execute the task which come from upper level, send the
333 * command or data to DMA area and then increase CI,for queuecommand(ssp),
334 * it is from upper layer and for smp command,it is from libsas,
335 * for ata command it is from libata.
336 * @task: the task to be execute.
337 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
338 * we always execute one one time.
339 * @gfp_flags: gfp_flags.
340 * @is tmf: if it is task management task.
341 * @tmf: the task management IU
342 */
343#define DEV_IS_GONE(pm8001_dev) \
344 ((!pm8001_dev || (pm8001_dev->dev_type == NO_DEVICE)))
345static int pm8001_task_exec(struct sas_task *task, const int num,
346 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
347{
348 struct domain_device *dev = task->dev;
349 struct pm8001_hba_info *pm8001_ha;
350 struct pm8001_device *pm8001_dev;
351 struct sas_task *t = task;
352 struct pm8001_ccb_info *ccb;
353 u32 tag = 0xdeadbeef, rc, n_elem = 0;
354 u32 n = num;
355 unsigned long flags = 0;
356
357 if (!dev->port) {
358 struct task_status_struct *tsm = &t->task_status;
359 tsm->resp = SAS_TASK_UNDELIVERED;
360 tsm->stat = SAS_PHY_DOWN;
361 if (dev->dev_type != SATA_DEV)
362 t->task_done(t);
363 return 0;
364 }
365 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
366 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
367 spin_lock_irqsave(&pm8001_ha->lock, flags);
368 do {
369 dev = t->dev;
370 pm8001_dev = dev->lldd_dev;
371 if (DEV_IS_GONE(pm8001_dev)) {
372 if (pm8001_dev) {
373 PM8001_IO_DBG(pm8001_ha,
374 pm8001_printk("device %d not ready.\n",
375 pm8001_dev->device_id));
376 } else {
377 PM8001_IO_DBG(pm8001_ha,
378 pm8001_printk("device %016llx not "
379 "ready.\n", SAS_ADDR(dev->sas_addr)));
380 }
381 rc = SAS_PHY_DOWN;
382 goto out_done;
383 }
384 rc = pm8001_tag_alloc(pm8001_ha, &tag);
385 if (rc)
386 goto err_out;
387 ccb = &pm8001_ha->ccb_info[tag];
388
389 if (!sas_protocol_ata(t->task_proto)) {
390 if (t->num_scatter) {
391 n_elem = dma_map_sg(pm8001_ha->dev,
392 t->scatter,
393 t->num_scatter,
394 t->data_dir);
395 if (!n_elem) {
396 rc = -ENOMEM;
397 goto err_out;
398 }
399 }
400 } else {
401 n_elem = t->num_scatter;
402 }
403
404 t->lldd_task = NULL;
405 ccb->n_elem = n_elem;
406 ccb->ccb_tag = tag;
407 ccb->task = t;
408 switch (t->task_proto) {
409 case SAS_PROTOCOL_SMP:
410 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
411 break;
412 case SAS_PROTOCOL_SSP:
413 if (is_tmf)
414 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
415 ccb, tmf);
416 else
417 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
418 break;
419 case SAS_PROTOCOL_SATA:
420 case SAS_PROTOCOL_STP:
421 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
422 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
423 break;
424 default:
425 dev_printk(KERN_ERR, pm8001_ha->dev,
426 "unknown sas_task proto: 0x%x\n",
427 t->task_proto);
428 rc = -EINVAL;
429 break;
430 }
431
432 if (rc) {
433 PM8001_IO_DBG(pm8001_ha,
434 pm8001_printk("rc is %x\n", rc));
435 goto err_out_tag;
436 }
437 t->lldd_task = ccb;
438 /* TODO: select normal or high priority */
439 spin_lock(&t->task_state_lock);
440 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
441 spin_unlock(&t->task_state_lock);
442 pm8001_dev->running_req++;
443 if (n > 1)
444 t = list_entry(t->list.next, struct sas_task, list);
445 } while (--n);
446 rc = 0;
447 goto out_done;
448
449err_out_tag:
450 pm8001_tag_free(pm8001_ha, tag);
451err_out:
452 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
453 if (!sas_protocol_ata(t->task_proto))
454 if (n_elem)
455 dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
456 t->data_dir);
457out_done:
458 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
459 return rc;
460}
461
462/**
463 * pm8001_queue_command - register for upper layer used, all IO commands sent
464 * to HBA are from this interface.
465 * @task: the task to be execute.
466 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
467 * we always execute one one time
468 * @gfp_flags: gfp_flags
469 */
470int pm8001_queue_command(struct sas_task *task, const int num,
471 gfp_t gfp_flags)
472{
473 return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
474}
475
476void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
477{
478 pm8001_tag_clear(pm8001_ha, ccb_idx);
479}
480
481/**
482 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
483 * @pm8001_ha: our hba card information
484 * @ccb: the ccb which attached to ssp task
485 * @task: the task to be free.
486 * @ccb_idx: ccb index.
487 */
488void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
489 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
490{
491 if (!ccb->task)
492 return;
493 if (!sas_protocol_ata(task->task_proto))
494 if (ccb->n_elem)
495 dma_unmap_sg(pm8001_ha->dev, task->scatter,
496 task->num_scatter, task->data_dir);
497
498 switch (task->task_proto) {
499 case SAS_PROTOCOL_SMP:
500 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
501 PCI_DMA_FROMDEVICE);
502 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
503 PCI_DMA_TODEVICE);
504 break;
505
506 case SAS_PROTOCOL_SATA:
507 case SAS_PROTOCOL_STP:
508 case SAS_PROTOCOL_SSP:
509 default:
510 /* do nothing */
511 break;
512 }
513 task->lldd_task = NULL;
514 ccb->task = NULL;
515 ccb->ccb_tag = 0xFFFFFFFF;
516 pm8001_ccb_free(pm8001_ha, ccb_idx);
517}
518
519 /**
520 * pm8001_alloc_dev - find the empty pm8001_device structure, allocate and
521 * return it for use.
522 * @pm8001_ha: our hba card information
523 */
524struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
525{
526 u32 dev;
527 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
528 if (pm8001_ha->devices[dev].dev_type == NO_DEVICE) {
529 pm8001_ha->devices[dev].id = dev;
530 return &pm8001_ha->devices[dev];
531 }
532 }
533 if (dev == PM8001_MAX_DEVICES) {
534 PM8001_FAIL_DBG(pm8001_ha,
535 pm8001_printk("max support %d devices, ignore ..\n",
536 PM8001_MAX_DEVICES));
537 }
538 return NULL;
539}
540
541static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
542{
543 u32 id = pm8001_dev->id;
544 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
545 pm8001_dev->id = id;
546 pm8001_dev->dev_type = NO_DEVICE;
547 pm8001_dev->device_id = PM8001_MAX_DEVICES;
548 pm8001_dev->sas_device = NULL;
549}
550
551/**
552 * pm8001_dev_found_notify - when libsas find a sas domain device, it should
553 * tell the LLDD that device is found, and then LLDD register this device to
554 * HBA FW by the command "OPC_INB_REG_DEV", after that the HBA will assign
555 * a device ID(according to device's sas address) and returned it to LLDD.from
556 * now on, we communicate with HBA FW with the device ID which HBA assigned
557 * rather than sas address. it is the neccessary step for our HBA but it is
558 * the optional for other HBA driver.
559 * @dev: the device structure which sas layer used.
560 */
561static int pm8001_dev_found_notify(struct domain_device *dev)
562{
563 unsigned long flags = 0;
564 int res = 0;
565 struct pm8001_hba_info *pm8001_ha = NULL;
566 struct domain_device *parent_dev = dev->parent;
567 struct pm8001_device *pm8001_device;
568 DECLARE_COMPLETION_ONSTACK(completion);
569 u32 flag = 0;
570 pm8001_ha = pm8001_find_ha_by_dev(dev);
571 spin_lock_irqsave(&pm8001_ha->lock, flags);
572
573 pm8001_device = pm8001_alloc_dev(pm8001_ha);
574 pm8001_device->sas_device = dev;
575 if (!pm8001_device) {
576 res = -1;
577 goto found_out;
578 }
579 dev->lldd_dev = pm8001_device;
580 pm8001_device->dev_type = dev->dev_type;
581 pm8001_device->dcompletion = &completion;
582 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
583 int phy_id;
584 struct ex_phy *phy;
585 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
586 phy_id++) {
587 phy = &parent_dev->ex_dev.ex_phy[phy_id];
588 if (SAS_ADDR(phy->attached_sas_addr)
589 == SAS_ADDR(dev->sas_addr)) {
590 pm8001_device->attached_phy = phy_id;
591 break;
592 }
593 }
594 if (phy_id == parent_dev->ex_dev.num_phys) {
595 PM8001_FAIL_DBG(pm8001_ha,
596 pm8001_printk("Error: no attached dev:%016llx"
597 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
598 SAS_ADDR(parent_dev->sas_addr)));
599 res = -1;
600 }
601 } else {
602 if (dev->dev_type == SATA_DEV) {
603 pm8001_device->attached_phy =
604 dev->rphy->identify.phy_identifier;
605 flag = 1; /* directly sata*/
606 }
607 } /*register this device to HBA*/
608 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device \n"));
609 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
610 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
611 wait_for_completion(&completion);
612 if (dev->dev_type == SAS_END_DEV)
613 msleep(50);
614 pm8001_ha->flags = PM8001F_RUN_TIME ;
615 return 0;
616found_out:
617 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
618 return res;
619}
620
621int pm8001_dev_found(struct domain_device *dev)
622{
623 return pm8001_dev_found_notify(dev);
624}
625
626/**
627 * pm8001_alloc_task - allocate a task structure for TMF
628 */
629static struct sas_task *pm8001_alloc_task(void)
630{
631 struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL);
632 if (task) {
633 INIT_LIST_HEAD(&task->list);
634 spin_lock_init(&task->task_state_lock);
635 task->task_state_flags = SAS_TASK_STATE_PENDING;
636 init_timer(&task->timer);
637 init_completion(&task->completion);
638 }
639 return task;
640}
641
642static void pm8001_free_task(struct sas_task *task)
643{
644 if (task) {
645 BUG_ON(!list_empty(&task->list));
646 kfree(task);
647 }
648}
649
650static void pm8001_task_done(struct sas_task *task)
651{
652 if (!del_timer(&task->timer))
653 return;
654 complete(&task->completion);
655}
656
657static void pm8001_tmf_timedout(unsigned long data)
658{
659 struct sas_task *task = (struct sas_task *)data;
660
661 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
662 complete(&task->completion);
663}
664
665#define PM8001_TASK_TIMEOUT 20
666/**
667 * pm8001_exec_internal_tmf_task - when errors or exception happened, we may
668 * want to do something, for example abort issued task which result in this
669 * execption, this is by calling this function, note it is also with the task
670 * execute interface.
671 * @dev: the wanted device.
672 * @tmf: which task management wanted to be take.
673 * @para_len: para_len.
674 * @parameter: ssp task parameter.
675 */
676static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
677 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
678{
679 int res, retry;
680 struct sas_task *task = NULL;
681 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
682
683 for (retry = 0; retry < 3; retry++) {
684 task = pm8001_alloc_task();
685 if (!task)
686 return -ENOMEM;
687
688 task->dev = dev;
689 task->task_proto = dev->tproto;
690 memcpy(&task->ssp_task, parameter, para_len);
691 task->task_done = pm8001_task_done;
692 task->timer.data = (unsigned long)task;
693 task->timer.function = pm8001_tmf_timedout;
694 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
695 add_timer(&task->timer);
696
697 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
698
699 if (res) {
700 del_timer(&task->timer);
701 PM8001_FAIL_DBG(pm8001_ha,
702 pm8001_printk("Executing internal task "
703 "failed\n"));
704 goto ex_err;
705 }
706 wait_for_completion(&task->completion);
707 res = -TMF_RESP_FUNC_FAILED;
708 /* Even TMF timed out, return direct. */
709 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
710 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
711 PM8001_FAIL_DBG(pm8001_ha,
712 pm8001_printk("TMF task[%x]timeout.\n",
713 tmf->tmf));
714 goto ex_err;
715 }
716 }
717
718 if (task->task_status.resp == SAS_TASK_COMPLETE &&
719 task->task_status.stat == SAM_GOOD) {
720 res = TMF_RESP_FUNC_COMPLETE;
721 break;
722 }
723
724 if (task->task_status.resp == SAS_TASK_COMPLETE &&
725 task->task_status.stat == SAS_DATA_UNDERRUN) {
726 /* no error, but return the number of bytes of
727 * underrun */
728 res = task->task_status.residual;
729 break;
730 }
731
732 if (task->task_status.resp == SAS_TASK_COMPLETE &&
733 task->task_status.stat == SAS_DATA_OVERRUN) {
734 PM8001_FAIL_DBG(pm8001_ha,
735 pm8001_printk("Blocked task error.\n"));
736 res = -EMSGSIZE;
737 break;
738 } else {
739 PM8001_IO_DBG(pm8001_ha,
740 pm8001_printk(" Task to dev %016llx response: 0x%x"
741 "status 0x%x\n",
742 SAS_ADDR(dev->sas_addr),
743 task->task_status.resp,
744 task->task_status.stat));
745 pm8001_free_task(task);
746 task = NULL;
747 }
748 }
749ex_err:
750 BUG_ON(retry == 3 && task != NULL);
751 if (task != NULL)
752 pm8001_free_task(task);
753 return res;
754}
755
756static int
757pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
758 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
759 u32 task_tag)
760{
761 int res, retry;
762 u32 rc, ccb_tag;
763 struct pm8001_ccb_info *ccb;
764 struct sas_task *task = NULL;
765
766 for (retry = 0; retry < 3; retry++) {
767 task = pm8001_alloc_task();
768 if (!task)
769 return -ENOMEM;
770
771 task->dev = dev;
772 task->task_proto = dev->tproto;
773 task->task_done = pm8001_task_done;
774 task->timer.data = (unsigned long)task;
775 task->timer.function = pm8001_tmf_timedout;
776 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
777 add_timer(&task->timer);
778
779 rc = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
780 if (rc)
781 return rc;
782 ccb = &pm8001_ha->ccb_info[ccb_tag];
783 ccb->device = pm8001_dev;
784 ccb->ccb_tag = ccb_tag;
785 ccb->task = task;
786
787 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
788 pm8001_dev, flag, task_tag, ccb_tag);
789
790 if (res) {
791 del_timer(&task->timer);
792 PM8001_FAIL_DBG(pm8001_ha,
793 pm8001_printk("Executing internal task "
794 "failed\n"));
795 goto ex_err;
796 }
797 wait_for_completion(&task->completion);
798 res = TMF_RESP_FUNC_FAILED;
799 /* Even TMF timed out, return direct. */
800 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
801 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
802 PM8001_FAIL_DBG(pm8001_ha,
803 pm8001_printk("TMF task timeout.\n"));
804 goto ex_err;
805 }
806 }
807
808 if (task->task_status.resp == SAS_TASK_COMPLETE &&
809 task->task_status.stat == SAM_GOOD) {
810 res = TMF_RESP_FUNC_COMPLETE;
811 break;
812
813 } else {
814 PM8001_IO_DBG(pm8001_ha,
815 pm8001_printk(" Task to dev %016llx response: "
816 "0x%x status 0x%x\n",
817 SAS_ADDR(dev->sas_addr),
818 task->task_status.resp,
819 task->task_status.stat));
820 pm8001_free_task(task);
821 task = NULL;
822 }
823 }
824ex_err:
825 BUG_ON(retry == 3 && task != NULL);
826 if (task != NULL)
827 pm8001_free_task(task);
828 return res;
829}
830
831/**
832 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
833 * @dev: the device structure which sas layer used.
834 */
835static void pm8001_dev_gone_notify(struct domain_device *dev)
836{
837 unsigned long flags = 0;
838 u32 tag;
839 struct pm8001_hba_info *pm8001_ha;
840 struct pm8001_device *pm8001_dev = dev->lldd_dev;
841 u32 device_id = pm8001_dev->device_id;
842 pm8001_ha = pm8001_find_ha_by_dev(dev);
843 spin_lock_irqsave(&pm8001_ha->lock, flags);
844 pm8001_tag_alloc(pm8001_ha, &tag);
845 if (pm8001_dev) {
846 PM8001_DISC_DBG(pm8001_ha,
847 pm8001_printk("found dev[%d:%x] is gone.\n",
848 pm8001_dev->device_id, pm8001_dev->dev_type));
849 if (pm8001_dev->running_req) {
850 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
851 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
852 dev, 1, 0);
853 spin_lock_irqsave(&pm8001_ha->lock, flags);
854 }
855 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
856 pm8001_free_dev(pm8001_dev);
857 } else {
858 PM8001_DISC_DBG(pm8001_ha,
859 pm8001_printk("Found dev has gone.\n"));
860 }
861 dev->lldd_dev = NULL;
862 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
863}
864
865void pm8001_dev_gone(struct domain_device *dev)
866{
867 pm8001_dev_gone_notify(dev);
868}
869
870static int pm8001_issue_ssp_tmf(struct domain_device *dev,
871 u8 *lun, struct pm8001_tmf_task *tmf)
872{
873 struct sas_ssp_task ssp_task;
874 if (!(dev->tproto & SAS_PROTOCOL_SSP))
875 return TMF_RESP_FUNC_ESUPP;
876
877 strncpy((u8 *)&ssp_task.LUN, lun, 8);
878 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
879 tmf);
880}
881
882/**
883 * Standard mandates link reset for ATA (type 0) and hard reset for
884 * SSP (type 1) , only for RECOVERY
885 */
886int pm8001_I_T_nexus_reset(struct domain_device *dev)
887{
888 int rc = TMF_RESP_FUNC_FAILED;
889 struct pm8001_device *pm8001_dev;
890 struct pm8001_hba_info *pm8001_ha;
891 struct sas_phy *phy;
892 if (!dev || !dev->lldd_dev)
893 return -1;
894
895 pm8001_dev = dev->lldd_dev;
896 pm8001_ha = pm8001_find_ha_by_dev(dev);
897 phy = sas_find_local_phy(dev);
898
899 if (dev_is_sata(dev)) {
900 DECLARE_COMPLETION_ONSTACK(completion_setstate);
901 rc = sas_phy_reset(phy, 1);
902 msleep(2000);
903 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
904 dev, 1, 0);
905 pm8001_dev->setds_completion = &completion_setstate;
906 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
907 pm8001_dev, 0x01);
908 wait_for_completion(&completion_setstate);
909 } else{
910 rc = sas_phy_reset(phy, 1);
911 msleep(2000);
912 }
913 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
914 pm8001_dev->device_id, rc));
915 return rc;
916}
917
918/* mandatory SAM-3, the task reset the specified LUN*/
919int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
920{
921 int rc = TMF_RESP_FUNC_FAILED;
922 struct pm8001_tmf_task tmf_task;
923 struct pm8001_device *pm8001_dev = dev->lldd_dev;
924 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
925 if (dev_is_sata(dev)) {
926 struct sas_phy *phy = sas_find_local_phy(dev);
927 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
928 dev, 1, 0);
929 rc = sas_phy_reset(phy, 1);
930 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
931 pm8001_dev, 0x01);
932 msleep(2000);
933 } else {
934 tmf_task.tmf = TMF_LU_RESET;
935 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
936 }
937 /* If failed, fall-through I_T_Nexus reset */
938 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
939 pm8001_dev->device_id, rc));
940 return rc;
941}
942
943/* optional SAM-3 */
944int pm8001_query_task(struct sas_task *task)
945{
946 u32 tag = 0xdeadbeef;
947 int i = 0;
948 struct scsi_lun lun;
949 struct pm8001_tmf_task tmf_task;
950 int rc = TMF_RESP_FUNC_FAILED;
951 if (unlikely(!task || !task->lldd_task || !task->dev))
952 return rc;
953
954 if (task->task_proto & SAS_PROTOCOL_SSP) {
955 struct scsi_cmnd *cmnd = task->uldd_task;
956 struct domain_device *dev = task->dev;
957 struct pm8001_hba_info *pm8001_ha =
958 pm8001_find_ha_by_dev(dev);
959
960 int_to_scsilun(cmnd->device->lun, &lun);
961 rc = pm8001_find_tag(task, &tag);
962 if (rc == 0) {
963 rc = TMF_RESP_FUNC_FAILED;
964 return rc;
965 }
966 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
967 for (i = 0; i < 16; i++)
968 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
969 printk(KERN_INFO "]\n");
970 tmf_task.tmf = TMF_QUERY_TASK;
971 tmf_task.tag_of_task_to_be_managed = tag;
972
973 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
974 switch (rc) {
975 /* The task is still in Lun, release it then */
976 case TMF_RESP_FUNC_SUCC:
977 PM8001_EH_DBG(pm8001_ha,
978 pm8001_printk("The task is still in Lun \n"));
979 /* The task is not in Lun or failed, reset the phy */
980 case TMF_RESP_FUNC_FAILED:
981 case TMF_RESP_FUNC_COMPLETE:
982 PM8001_EH_DBG(pm8001_ha,
983 pm8001_printk("The task is not in Lun or failed,"
984 " reset the phy \n"));
985 break;
986 }
987 }
988 pm8001_printk(":rc= %d\n", rc);
989 return rc;
990}
991
992/* mandatory SAM-3, still need free task/ccb info, abord the specified task */
993int pm8001_abort_task(struct sas_task *task)
994{
995 unsigned long flags;
996 u32 tag = 0xdeadbeef;
997 u32 device_id;
998 struct domain_device *dev ;
999 struct pm8001_hba_info *pm8001_ha = NULL;
1000 struct pm8001_ccb_info *ccb;
1001 struct scsi_lun lun;
1002 struct pm8001_device *pm8001_dev;
1003 struct pm8001_tmf_task tmf_task;
1004 int rc = TMF_RESP_FUNC_FAILED;
1005 if (unlikely(!task || !task->lldd_task || !task->dev))
1006 return rc;
1007 spin_lock_irqsave(&task->task_state_lock, flags);
1008 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1009 spin_unlock_irqrestore(&task->task_state_lock, flags);
1010 rc = TMF_RESP_FUNC_COMPLETE;
1011 goto out;
1012 }
1013 spin_unlock_irqrestore(&task->task_state_lock, flags);
1014 if (task->task_proto & SAS_PROTOCOL_SSP) {
1015 struct scsi_cmnd *cmnd = task->uldd_task;
1016 dev = task->dev;
1017 ccb = task->lldd_task;
1018 pm8001_dev = dev->lldd_dev;
1019 pm8001_ha = pm8001_find_ha_by_dev(dev);
1020 int_to_scsilun(cmnd->device->lun, &lun);
1021 rc = pm8001_find_tag(task, &tag);
1022 if (rc == 0) {
1023 printk(KERN_INFO "No such tag in %s\n", __func__);
1024 rc = TMF_RESP_FUNC_FAILED;
1025 return rc;
1026 }
1027 device_id = pm8001_dev->device_id;
1028 PM8001_EH_DBG(pm8001_ha,
1029 pm8001_printk("abort io to device_id = %d\n", device_id));
1030 tmf_task.tmf = TMF_ABORT_TASK;
1031 tmf_task.tag_of_task_to_be_managed = tag;
1032 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1033 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1034 pm8001_dev->sas_device, 0, tag);
1035 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1036 task->task_proto & SAS_PROTOCOL_STP) {
1037 dev = task->dev;
1038 pm8001_dev = dev->lldd_dev;
1039 pm8001_ha = pm8001_find_ha_by_dev(dev);
1040 rc = pm8001_find_tag(task, &tag);
1041 if (rc == 0) {
1042 printk(KERN_INFO "No such tag in %s\n", __func__);
1043 rc = TMF_RESP_FUNC_FAILED;
1044 return rc;
1045 }
1046 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1047 pm8001_dev->sas_device, 0, tag);
1048 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1049 /* SMP */
1050 dev = task->dev;
1051 pm8001_dev = dev->lldd_dev;
1052 pm8001_ha = pm8001_find_ha_by_dev(dev);
1053 rc = pm8001_find_tag(task, &tag);
1054 if (rc == 0) {
1055 printk(KERN_INFO "No such tag in %s\n", __func__);
1056 rc = TMF_RESP_FUNC_FAILED;
1057 return rc;
1058 }
1059 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1060 pm8001_dev->sas_device, 0, tag);
1061
1062 }
1063out:
1064 if (rc != TMF_RESP_FUNC_COMPLETE)
1065 pm8001_printk("rc= %d\n", rc);
1066 return rc;
1067}
1068
1069int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1070{
1071 int rc = TMF_RESP_FUNC_FAILED;
1072 struct pm8001_tmf_task tmf_task;
1073
1074 tmf_task.tmf = TMF_ABORT_TASK_SET;
1075 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1076 return rc;
1077}
1078
1079int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1080{
1081 int rc = TMF_RESP_FUNC_FAILED;
1082 struct pm8001_tmf_task tmf_task;
1083
1084 tmf_task.tmf = TMF_CLEAR_ACA;
1085 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1086
1087 return rc;
1088}
1089
1090int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1091{
1092 int rc = TMF_RESP_FUNC_FAILED;
1093 struct pm8001_tmf_task tmf_task;
1094 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1095 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1096
1097 PM8001_EH_DBG(pm8001_ha,
1098 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1099 pm8001_dev->device_id));
1100 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1101 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1102 return rc;
1103}
1104
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 21:40:42 -0500