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dbf9bfe6 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;
d0b68041 243 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
dbf9bfe6 244 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
245 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
246}
247
248int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
249{
250 /* give the phy enabling interrupt event time to come in (1s
251 * is empirically about all it takes) */
252 if (time < HZ)
253 return 0;
254 /* Wait for discovery to finish */
255 scsi_flush_work(shost);
256 return 1;
257}
258
259/**
260 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
261 * @pm8001_ha: our hba card information
262 * @ccb: the ccb which attached to smp task
263 */
264static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
265 struct pm8001_ccb_info *ccb)
266{
267 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
268}
269
270u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
271{
272 struct ata_queued_cmd *qc = task->uldd_task;
273 if (qc) {
274 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
275 qc->tf.command == ATA_CMD_FPDMA_READ) {
276 *tag = qc->tag;
277 return 1;
278 }
279 }
280 return 0;
281}
282
283/**
284 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
285 * @pm8001_ha: our hba card information
286 * @ccb: the ccb which attached to sata task
287 */
288static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
289 struct pm8001_ccb_info *ccb)
290{
291 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
292}
293
294/**
295 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
296 * @pm8001_ha: our hba card information
297 * @ccb: the ccb which attached to TM
298 * @tmf: the task management IU
299 */
300static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
301 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
302{
303 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
304}
305
306/**
307 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
308 * @pm8001_ha: our hba card information
309 * @ccb: the ccb which attached to ssp task
310 */
311static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
312 struct pm8001_ccb_info *ccb)
313{
314 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
315}
316int pm8001_slave_configure(struct scsi_device *sdev)
317{
318 struct domain_device *dev = sdev_to_domain_dev(sdev);
319 int ret = sas_slave_configure(sdev);
320 if (ret)
321 return ret;
322 if (dev_is_sata(dev)) {
323 #ifdef PM8001_DISABLE_NCQ
324 struct ata_port *ap = dev->sata_dev.ap;
325 struct ata_device *adev = ap->link.device;
326 adev->flags |= ATA_DFLAG_NCQ_OFF;
327 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, 1);
328 #endif
329 }
330 return 0;
331}
1cc943ae 332 /* Find the local port id that's attached to this device */
333static int sas_find_local_port_id(struct domain_device *dev)
334{
335 struct domain_device *pdev = dev->parent;
336
337 /* Directly attached device */
338 if (!pdev)
339 return dev->port->id;
340 while (pdev) {
341 struct domain_device *pdev_p = pdev->parent;
342 if (!pdev_p)
343 return pdev->port->id;
344 pdev = pdev->parent;
345 }
346 return 0;
347}
348
dbf9bfe6 349/**
97ee2088 350 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
dbf9bfe6 351 * @task: the task to be execute.
352 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
353 * we always execute one one time.
354 * @gfp_flags: gfp_flags.
97ee2088 355 * @is_tmf: if it is task management task.
dbf9bfe6 356 * @tmf: the task management IU
357 */
358#define DEV_IS_GONE(pm8001_dev) \
359 ((!pm8001_dev || (pm8001_dev->dev_type == NO_DEVICE)))
360static int pm8001_task_exec(struct sas_task *task, const int num,
361 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
362{
363 struct domain_device *dev = task->dev;
364 struct pm8001_hba_info *pm8001_ha;
365 struct pm8001_device *pm8001_dev;
1cc943ae 366 struct pm8001_port *port = NULL;
dbf9bfe6 367 struct sas_task *t = task;
368 struct pm8001_ccb_info *ccb;
369 u32 tag = 0xdeadbeef, rc, n_elem = 0;
370 u32 n = num;
1cc943ae 371 unsigned long flags = 0, flags_libsas = 0;
dbf9bfe6 372
373 if (!dev->port) {
374 struct task_status_struct *tsm = &t->task_status;
375 tsm->resp = SAS_TASK_UNDELIVERED;
376 tsm->stat = SAS_PHY_DOWN;
377 if (dev->dev_type != SATA_DEV)
378 t->task_done(t);
379 return 0;
380 }
381 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
382 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
383 spin_lock_irqsave(&pm8001_ha->lock, flags);
384 do {
385 dev = t->dev;
386 pm8001_dev = dev->lldd_dev;
387 if (DEV_IS_GONE(pm8001_dev)) {
388 if (pm8001_dev) {
389 PM8001_IO_DBG(pm8001_ha,
390 pm8001_printk("device %d not ready.\n",
391 pm8001_dev->device_id));
392 } else {
393 PM8001_IO_DBG(pm8001_ha,
394 pm8001_printk("device %016llx not "
395 "ready.\n", SAS_ADDR(dev->sas_addr)));
396 }
97ee2088 397 rc = SAS_PHY_DOWN;
dbf9bfe6 398 goto out_done;
399 }
1cc943ae 400 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
401 if (!port->port_attached) {
402 if (sas_protocol_ata(t->task_proto)) {
403 struct task_status_struct *ts = &t->task_status;
404 ts->resp = SAS_TASK_UNDELIVERED;
405 ts->stat = SAS_PHY_DOWN;
406
407 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
408 spin_unlock_irqrestore(dev->sata_dev.ap->lock,
409 flags_libsas);
410 t->task_done(t);
411 spin_lock_irqsave(dev->sata_dev.ap->lock,
412 flags_libsas);
413 spin_lock_irqsave(&pm8001_ha->lock, flags);
414 if (n > 1)
415 t = list_entry(t->list.next,
416 struct sas_task, list);
417 continue;
418 } else {
419 struct task_status_struct *ts = &t->task_status;
420 ts->resp = SAS_TASK_UNDELIVERED;
421 ts->stat = SAS_PHY_DOWN;
422 t->task_done(t);
423 if (n > 1)
424 t = list_entry(t->list.next,
425 struct sas_task, list);
426 continue;
427 }
428 }
dbf9bfe6 429 rc = pm8001_tag_alloc(pm8001_ha, &tag);
430 if (rc)
431 goto err_out;
432 ccb = &pm8001_ha->ccb_info[tag];
433
434 if (!sas_protocol_ata(t->task_proto)) {
435 if (t->num_scatter) {
436 n_elem = dma_map_sg(pm8001_ha->dev,
437 t->scatter,
438 t->num_scatter,
439 t->data_dir);
440 if (!n_elem) {
441 rc = -ENOMEM;
97ee2088 442 goto err_out_tag;
dbf9bfe6 443 }
444 }
445 } else {
446 n_elem = t->num_scatter;
447 }
448
97ee2088 449 t->lldd_task = ccb;
dbf9bfe6 450 ccb->n_elem = n_elem;
451 ccb->ccb_tag = tag;
452 ccb->task = t;
453 switch (t->task_proto) {
454 case SAS_PROTOCOL_SMP:
455 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
456 break;
457 case SAS_PROTOCOL_SSP:
458 if (is_tmf)
459 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
460 ccb, tmf);
461 else
462 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
463 break;
464 case SAS_PROTOCOL_SATA:
465 case SAS_PROTOCOL_STP:
466 case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
467 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
468 break;
469 default:
470 dev_printk(KERN_ERR, pm8001_ha->dev,
471 "unknown sas_task proto: 0x%x\n",
472 t->task_proto);
473 rc = -EINVAL;
474 break;
475 }
476
477 if (rc) {
478 PM8001_IO_DBG(pm8001_ha,
479 pm8001_printk("rc is %x\n", rc));
480 goto err_out_tag;
481 }
dbf9bfe6 482 /* TODO: select normal or high priority */
483 spin_lock(&t->task_state_lock);
484 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
485 spin_unlock(&t->task_state_lock);
486 pm8001_dev->running_req++;
487 if (n > 1)
488 t = list_entry(t->list.next, struct sas_task, list);
489 } while (--n);
490 rc = 0;
491 goto out_done;
492
493err_out_tag:
494 pm8001_tag_free(pm8001_ha, tag);
495err_out:
496 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
497 if (!sas_protocol_ata(t->task_proto))
498 if (n_elem)
499 dma_unmap_sg(pm8001_ha->dev, t->scatter, n_elem,
500 t->data_dir);
501out_done:
502 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
503 return rc;
504}
505
506/**
507 * pm8001_queue_command - register for upper layer used, all IO commands sent
508 * to HBA are from this interface.
509 * @task: the task to be execute.
510 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
511 * we always execute one one time
512 * @gfp_flags: gfp_flags
513 */
514int pm8001_queue_command(struct sas_task *task, const int num,
515 gfp_t gfp_flags)
516{
517 return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
518}
519
520void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
521{
522 pm8001_tag_clear(pm8001_ha, ccb_idx);
523}
524
525/**
526 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
527 * @pm8001_ha: our hba card information
528 * @ccb: the ccb which attached to ssp task
529 * @task: the task to be free.
530 * @ccb_idx: ccb index.
531 */
532void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
533 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
534{
535 if (!ccb->task)
536 return;
537 if (!sas_protocol_ata(task->task_proto))
538 if (ccb->n_elem)
539 dma_unmap_sg(pm8001_ha->dev, task->scatter,
540 task->num_scatter, task->data_dir);
541
542 switch (task->task_proto) {
543 case SAS_PROTOCOL_SMP:
544 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
545 PCI_DMA_FROMDEVICE);
546 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
547 PCI_DMA_TODEVICE);
548 break;
549
550 case SAS_PROTOCOL_SATA:
551 case SAS_PROTOCOL_STP:
552 case SAS_PROTOCOL_SSP:
553 default:
554 /* do nothing */
555 break;
556 }
557 task->lldd_task = NULL;
558 ccb->task = NULL;
559 ccb->ccb_tag = 0xFFFFFFFF;
560 pm8001_ccb_free(pm8001_ha, ccb_idx);
561}
562
563 /**
97ee2088 564 * pm8001_alloc_dev - find a empty pm8001_device
dbf9bfe6 565 * @pm8001_ha: our hba card information
566 */
567struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
568{
569 u32 dev;
570 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
571 if (pm8001_ha->devices[dev].dev_type == NO_DEVICE) {
572 pm8001_ha->devices[dev].id = dev;
573 return &pm8001_ha->devices[dev];
574 }
575 }
576 if (dev == PM8001_MAX_DEVICES) {
577 PM8001_FAIL_DBG(pm8001_ha,
578 pm8001_printk("max support %d devices, ignore ..\n",
579 PM8001_MAX_DEVICES));
580 }
581 return NULL;
582}
583
584static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
585{
586 u32 id = pm8001_dev->id;
587 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
588 pm8001_dev->id = id;
589 pm8001_dev->dev_type = NO_DEVICE;
590 pm8001_dev->device_id = PM8001_MAX_DEVICES;
591 pm8001_dev->sas_device = NULL;
592}
593
594/**
97ee2088 595 * pm8001_dev_found_notify - libsas notify a device is found.
596 * @dev: the device structure which sas layer used.
597 *
598 * when libsas find a sas domain device, it should tell the LLDD that
599 * device is found, and then LLDD register this device to HBA firmware
600 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
601 * device ID(according to device's sas address) and returned it to LLDD. From
dbf9bfe6 602 * now on, we communicate with HBA FW with the device ID which HBA assigned
3ad2f3fb 603 * rather than sas address. it is the necessary step for our HBA but it is
dbf9bfe6 604 * the optional for other HBA driver.
dbf9bfe6 605 */
606static int pm8001_dev_found_notify(struct domain_device *dev)
607{
608 unsigned long flags = 0;
609 int res = 0;
610 struct pm8001_hba_info *pm8001_ha = NULL;
611 struct domain_device *parent_dev = dev->parent;
612 struct pm8001_device *pm8001_device;
613 DECLARE_COMPLETION_ONSTACK(completion);
614 u32 flag = 0;
615 pm8001_ha = pm8001_find_ha_by_dev(dev);
616 spin_lock_irqsave(&pm8001_ha->lock, flags);
617
618 pm8001_device = pm8001_alloc_dev(pm8001_ha);
dbf9bfe6 619 if (!pm8001_device) {
620 res = -1;
621 goto found_out;
622 }
f01f4e6a 623 pm8001_device->sas_device = dev;
dbf9bfe6 624 dev->lldd_dev = pm8001_device;
625 pm8001_device->dev_type = dev->dev_type;
626 pm8001_device->dcompletion = &completion;
627 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
628 int phy_id;
629 struct ex_phy *phy;
630 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
631 phy_id++) {
632 phy = &parent_dev->ex_dev.ex_phy[phy_id];
633 if (SAS_ADDR(phy->attached_sas_addr)
634 == SAS_ADDR(dev->sas_addr)) {
635 pm8001_device->attached_phy = phy_id;
636 break;
637 }
638 }
639 if (phy_id == parent_dev->ex_dev.num_phys) {
640 PM8001_FAIL_DBG(pm8001_ha,
641 pm8001_printk("Error: no attached dev:%016llx"
642 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
643 SAS_ADDR(parent_dev->sas_addr)));
644 res = -1;
645 }
646 } else {
647 if (dev->dev_type == SATA_DEV) {
648 pm8001_device->attached_phy =
649 dev->rphy->identify.phy_identifier;
650 flag = 1; /* directly sata*/
651 }
652 } /*register this device to HBA*/
653 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device \n"));
654 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
655 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
656 wait_for_completion(&completion);
657 if (dev->dev_type == SAS_END_DEV)
658 msleep(50);
a61b8699 659 pm8001_ha->flags |= PM8001F_RUN_TIME ;
dbf9bfe6 660 return 0;
661found_out:
662 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
663 return res;
664}
665
666int pm8001_dev_found(struct domain_device *dev)
667{
668 return pm8001_dev_found_notify(dev);
669}
670
671/**
672 * pm8001_alloc_task - allocate a task structure for TMF
673 */
674static struct sas_task *pm8001_alloc_task(void)
675{
676 struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL);
677 if (task) {
678 INIT_LIST_HEAD(&task->list);
679 spin_lock_init(&task->task_state_lock);
680 task->task_state_flags = SAS_TASK_STATE_PENDING;
681 init_timer(&task->timer);
682 init_completion(&task->completion);
683 }
684 return task;
685}
686
687static void pm8001_free_task(struct sas_task *task)
688{
689 if (task) {
690 BUG_ON(!list_empty(&task->list));
691 kfree(task);
692 }
693}
694
695static void pm8001_task_done(struct sas_task *task)
696{
697 if (!del_timer(&task->timer))
698 return;
699 complete(&task->completion);
700}
701
702static void pm8001_tmf_timedout(unsigned long data)
703{
704 struct sas_task *task = (struct sas_task *)data;
705
706 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
707 complete(&task->completion);
708}
709
710#define PM8001_TASK_TIMEOUT 20
711/**
97ee2088 712 * pm8001_exec_internal_tmf_task - execute some task management commands.
dbf9bfe6 713 * @dev: the wanted device.
714 * @tmf: which task management wanted to be take.
715 * @para_len: para_len.
716 * @parameter: ssp task parameter.
97ee2088 717 *
718 * when errors or exception happened, we may want to do something, for example
719 * abort the issued task which result in this execption, it is done by calling
720 * this function, note it is also with the task execute interface.
dbf9bfe6 721 */
722static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
723 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
724{
725 int res, retry;
726 struct sas_task *task = NULL;
727 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
728
729 for (retry = 0; retry < 3; retry++) {
730 task = pm8001_alloc_task();
731 if (!task)
732 return -ENOMEM;
733
734 task->dev = dev;
735 task->task_proto = dev->tproto;
736 memcpy(&task->ssp_task, parameter, para_len);
737 task->task_done = pm8001_task_done;
738 task->timer.data = (unsigned long)task;
739 task->timer.function = pm8001_tmf_timedout;
740 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
741 add_timer(&task->timer);
742
743 res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf);
744
745 if (res) {
746 del_timer(&task->timer);
747 PM8001_FAIL_DBG(pm8001_ha,
748 pm8001_printk("Executing internal task "
749 "failed\n"));
750 goto ex_err;
751 }
752 wait_for_completion(&task->completion);
753 res = -TMF_RESP_FUNC_FAILED;
754 /* Even TMF timed out, return direct. */
755 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
756 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
757 PM8001_FAIL_DBG(pm8001_ha,
758 pm8001_printk("TMF task[%x]timeout.\n",
759 tmf->tmf));
760 goto ex_err;
761 }
762 }
763
764 if (task->task_status.resp == SAS_TASK_COMPLETE &&
765 task->task_status.stat == SAM_GOOD) {
766 res = TMF_RESP_FUNC_COMPLETE;
767 break;
768 }
769
770 if (task->task_status.resp == SAS_TASK_COMPLETE &&
771 task->task_status.stat == SAS_DATA_UNDERRUN) {
772 /* no error, but return the number of bytes of
773 * underrun */
774 res = task->task_status.residual;
775 break;
776 }
777
778 if (task->task_status.resp == SAS_TASK_COMPLETE &&
779 task->task_status.stat == SAS_DATA_OVERRUN) {
780 PM8001_FAIL_DBG(pm8001_ha,
781 pm8001_printk("Blocked task error.\n"));
782 res = -EMSGSIZE;
783 break;
784 } else {
97ee2088 785 PM8001_EH_DBG(pm8001_ha,
786 pm8001_printk(" Task to dev %016llx response:"
787 "0x%x status 0x%x\n",
dbf9bfe6 788 SAS_ADDR(dev->sas_addr),
789 task->task_status.resp,
790 task->task_status.stat));
791 pm8001_free_task(task);
792 task = NULL;
793 }
794 }
795ex_err:
796 BUG_ON(retry == 3 && task != NULL);
797 if (task != NULL)
798 pm8001_free_task(task);
799 return res;
800}
801
802static int
803pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
804 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
805 u32 task_tag)
806{
807 int res, retry;
97ee2088 808 u32 ccb_tag;
dbf9bfe6 809 struct pm8001_ccb_info *ccb;
810 struct sas_task *task = NULL;
811
812 for (retry = 0; retry < 3; retry++) {
813 task = pm8001_alloc_task();
814 if (!task)
815 return -ENOMEM;
816
817 task->dev = dev;
818 task->task_proto = dev->tproto;
819 task->task_done = pm8001_task_done;
820 task->timer.data = (unsigned long)task;
821 task->timer.function = pm8001_tmf_timedout;
83e73329 822 task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
dbf9bfe6 823 add_timer(&task->timer);
824
97ee2088 825 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
826 if (res)
827 return res;
dbf9bfe6 828 ccb = &pm8001_ha->ccb_info[ccb_tag];
829 ccb->device = pm8001_dev;
830 ccb->ccb_tag = ccb_tag;
831 ccb->task = task;
832
833 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
834 pm8001_dev, flag, task_tag, ccb_tag);
835
836 if (res) {
837 del_timer(&task->timer);
838 PM8001_FAIL_DBG(pm8001_ha,
839 pm8001_printk("Executing internal task "
840 "failed\n"));
841 goto ex_err;
842 }
843 wait_for_completion(&task->completion);
844 res = TMF_RESP_FUNC_FAILED;
845 /* Even TMF timed out, return direct. */
846 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
847 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
848 PM8001_FAIL_DBG(pm8001_ha,
849 pm8001_printk("TMF task timeout.\n"));
850 goto ex_err;
851 }
852 }
853
854 if (task->task_status.resp == SAS_TASK_COMPLETE &&
855 task->task_status.stat == SAM_GOOD) {
856 res = TMF_RESP_FUNC_COMPLETE;
857 break;
858
859 } else {
97ee2088 860 PM8001_EH_DBG(pm8001_ha,
dbf9bfe6 861 pm8001_printk(" Task to dev %016llx response: "
862 "0x%x status 0x%x\n",
863 SAS_ADDR(dev->sas_addr),
864 task->task_status.resp,
865 task->task_status.stat));
866 pm8001_free_task(task);
867 task = NULL;
868 }
869 }
870ex_err:
871 BUG_ON(retry == 3 && task != NULL);
872 if (task != NULL)
873 pm8001_free_task(task);
874 return res;
875}
876
877/**
878 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
879 * @dev: the device structure which sas layer used.
880 */
881static void pm8001_dev_gone_notify(struct domain_device *dev)
882{
883 unsigned long flags = 0;
884 u32 tag;
885 struct pm8001_hba_info *pm8001_ha;
886 struct pm8001_device *pm8001_dev = dev->lldd_dev;
887 u32 device_id = pm8001_dev->device_id;
888 pm8001_ha = pm8001_find_ha_by_dev(dev);
889 spin_lock_irqsave(&pm8001_ha->lock, flags);
890 pm8001_tag_alloc(pm8001_ha, &tag);
891 if (pm8001_dev) {
892 PM8001_DISC_DBG(pm8001_ha,
893 pm8001_printk("found dev[%d:%x] is gone.\n",
894 pm8001_dev->device_id, pm8001_dev->dev_type));
895 if (pm8001_dev->running_req) {
896 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
897 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
898 dev, 1, 0);
899 spin_lock_irqsave(&pm8001_ha->lock, flags);
900 }
901 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
902 pm8001_free_dev(pm8001_dev);
903 } else {
904 PM8001_DISC_DBG(pm8001_ha,
905 pm8001_printk("Found dev has gone.\n"));
906 }
907 dev->lldd_dev = NULL;
908 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
909}
910
911void pm8001_dev_gone(struct domain_device *dev)
912{
913 pm8001_dev_gone_notify(dev);
914}
915
916static int pm8001_issue_ssp_tmf(struct domain_device *dev,
917 u8 *lun, struct pm8001_tmf_task *tmf)
918{
919 struct sas_ssp_task ssp_task;
920 if (!(dev->tproto & SAS_PROTOCOL_SSP))
921 return TMF_RESP_FUNC_ESUPP;
922
923 strncpy((u8 *)&ssp_task.LUN, lun, 8);
924 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
925 tmf);
926}
927
928/**
929 * Standard mandates link reset for ATA (type 0) and hard reset for
930 * SSP (type 1) , only for RECOVERY
931 */
932int pm8001_I_T_nexus_reset(struct domain_device *dev)
933{
934 int rc = TMF_RESP_FUNC_FAILED;
935 struct pm8001_device *pm8001_dev;
936 struct pm8001_hba_info *pm8001_ha;
937 struct sas_phy *phy;
938 if (!dev || !dev->lldd_dev)
939 return -1;
940
941 pm8001_dev = dev->lldd_dev;
942 pm8001_ha = pm8001_find_ha_by_dev(dev);
943 phy = sas_find_local_phy(dev);
944
945 if (dev_is_sata(dev)) {
946 DECLARE_COMPLETION_ONSTACK(completion_setstate);
8257ec80 947 if (scsi_is_sas_phy_local(phy))
948 return 0;
dbf9bfe6 949 rc = sas_phy_reset(phy, 1);
950 msleep(2000);
951 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
952 dev, 1, 0);
953 pm8001_dev->setds_completion = &completion_setstate;
954 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
955 pm8001_dev, 0x01);
956 wait_for_completion(&completion_setstate);
957 } else{
958 rc = sas_phy_reset(phy, 1);
959 msleep(2000);
960 }
961 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
962 pm8001_dev->device_id, rc));
963 return rc;
964}
965
966/* mandatory SAM-3, the task reset the specified LUN*/
967int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
968{
969 int rc = TMF_RESP_FUNC_FAILED;
970 struct pm8001_tmf_task tmf_task;
971 struct pm8001_device *pm8001_dev = dev->lldd_dev;
972 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
973 if (dev_is_sata(dev)) {
974 struct sas_phy *phy = sas_find_local_phy(dev);
975 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
976 dev, 1, 0);
977 rc = sas_phy_reset(phy, 1);
978 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
979 pm8001_dev, 0x01);
980 msleep(2000);
981 } else {
982 tmf_task.tmf = TMF_LU_RESET;
983 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
984 }
985 /* If failed, fall-through I_T_Nexus reset */
986 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
987 pm8001_dev->device_id, rc));
988 return rc;
989}
990
991/* optional SAM-3 */
992int pm8001_query_task(struct sas_task *task)
993{
994 u32 tag = 0xdeadbeef;
995 int i = 0;
996 struct scsi_lun lun;
997 struct pm8001_tmf_task tmf_task;
998 int rc = TMF_RESP_FUNC_FAILED;
999 if (unlikely(!task || !task->lldd_task || !task->dev))
1000 return rc;
1001
1002 if (task->task_proto & SAS_PROTOCOL_SSP) {
1003 struct scsi_cmnd *cmnd = task->uldd_task;
1004 struct domain_device *dev = task->dev;
1005 struct pm8001_hba_info *pm8001_ha =
1006 pm8001_find_ha_by_dev(dev);
1007
1008 int_to_scsilun(cmnd->device->lun, &lun);
1009 rc = pm8001_find_tag(task, &tag);
1010 if (rc == 0) {
1011 rc = TMF_RESP_FUNC_FAILED;
1012 return rc;
1013 }
1014 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1015 for (i = 0; i < 16; i++)
1016 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1017 printk(KERN_INFO "]\n");
1018 tmf_task.tmf = TMF_QUERY_TASK;
1019 tmf_task.tag_of_task_to_be_managed = tag;
1020
1021 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1022 switch (rc) {
1023 /* The task is still in Lun, release it then */
1024 case TMF_RESP_FUNC_SUCC:
1025 PM8001_EH_DBG(pm8001_ha,
1026 pm8001_printk("The task is still in Lun \n"));
1027 /* The task is not in Lun or failed, reset the phy */
1028 case TMF_RESP_FUNC_FAILED:
1029 case TMF_RESP_FUNC_COMPLETE:
1030 PM8001_EH_DBG(pm8001_ha,
1031 pm8001_printk("The task is not in Lun or failed,"
1032 " reset the phy \n"));
1033 break;
1034 }
1035 }
1036 pm8001_printk(":rc= %d\n", rc);
1037 return rc;
1038}
1039
1040/* mandatory SAM-3, still need free task/ccb info, abord the specified task */
1041int pm8001_abort_task(struct sas_task *task)
1042{
1043 unsigned long flags;
1044 u32 tag = 0xdeadbeef;
1045 u32 device_id;
1046 struct domain_device *dev ;
1047 struct pm8001_hba_info *pm8001_ha = NULL;
1048 struct pm8001_ccb_info *ccb;
1049 struct scsi_lun lun;
1050 struct pm8001_device *pm8001_dev;
1051 struct pm8001_tmf_task tmf_task;
1052 int rc = TMF_RESP_FUNC_FAILED;
1053 if (unlikely(!task || !task->lldd_task || !task->dev))
1054 return rc;
1055 spin_lock_irqsave(&task->task_state_lock, flags);
1056 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1057 spin_unlock_irqrestore(&task->task_state_lock, flags);
1058 rc = TMF_RESP_FUNC_COMPLETE;
1059 goto out;
1060 }
1061 spin_unlock_irqrestore(&task->task_state_lock, flags);
1062 if (task->task_proto & SAS_PROTOCOL_SSP) {
1063 struct scsi_cmnd *cmnd = task->uldd_task;
1064 dev = task->dev;
1065 ccb = task->lldd_task;
1066 pm8001_dev = dev->lldd_dev;
1067 pm8001_ha = pm8001_find_ha_by_dev(dev);
1068 int_to_scsilun(cmnd->device->lun, &lun);
1069 rc = pm8001_find_tag(task, &tag);
1070 if (rc == 0) {
1071 printk(KERN_INFO "No such tag in %s\n", __func__);
1072 rc = TMF_RESP_FUNC_FAILED;
1073 return rc;
1074 }
1075 device_id = pm8001_dev->device_id;
1076 PM8001_EH_DBG(pm8001_ha,
97ee2088 1077 pm8001_printk("abort io to deviceid= %d\n", device_id));
1078 tmf_task.tmf = TMF_ABORT_TASK;
dbf9bfe6 1079 tmf_task.tag_of_task_to_be_managed = tag;
1080 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
97ee2088 1081 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
dbf9bfe6 1082 pm8001_dev->sas_device, 0, tag);
1083 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1084 task->task_proto & SAS_PROTOCOL_STP) {
1085 dev = task->dev;
1086 pm8001_dev = dev->lldd_dev;
1087 pm8001_ha = pm8001_find_ha_by_dev(dev);
1088 rc = pm8001_find_tag(task, &tag);
1089 if (rc == 0) {
1090 printk(KERN_INFO "No such tag in %s\n", __func__);
1091 rc = TMF_RESP_FUNC_FAILED;
1092 return rc;
1093 }
1094 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1095 pm8001_dev->sas_device, 0, tag);
1096 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1097 /* SMP */
1098 dev = task->dev;
1099 pm8001_dev = dev->lldd_dev;
1100 pm8001_ha = pm8001_find_ha_by_dev(dev);
1101 rc = pm8001_find_tag(task, &tag);
1102 if (rc == 0) {
1103 printk(KERN_INFO "No such tag in %s\n", __func__);
1104 rc = TMF_RESP_FUNC_FAILED;
1105 return rc;
1106 }
1107 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1108 pm8001_dev->sas_device, 0, tag);
1109
1110 }
1111out:
1112 if (rc != TMF_RESP_FUNC_COMPLETE)
1113 pm8001_printk("rc= %d\n", rc);
1114 return rc;
1115}
1116
1117int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1118{
1119 int rc = TMF_RESP_FUNC_FAILED;
1120 struct pm8001_tmf_task tmf_task;
1121
1122 tmf_task.tmf = TMF_ABORT_TASK_SET;
1123 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1124 return rc;
1125}
1126
1127int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1128{
1129 int rc = TMF_RESP_FUNC_FAILED;
1130 struct pm8001_tmf_task tmf_task;
1131
1132 tmf_task.tmf = TMF_CLEAR_ACA;
1133 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1134
1135 return rc;
1136}
1137
1138int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1139{
1140 int rc = TMF_RESP_FUNC_FAILED;
1141 struct pm8001_tmf_task tmf_task;
1142 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1143 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1144
1145 PM8001_EH_DBG(pm8001_ha,
1146 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1147 pm8001_dev->device_id));
1148 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1149 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1150 return rc;
1151}
1152
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