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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / scsi / libsas / sas_ata.c
blob6489cdf2d49b152114ceb9d709fa197530ac2f3e
1 /*
2 * Support for SATA devices on Serial Attached SCSI (SAS) controllers
3 *
4 * Copyright (C) 2006 IBM Corporation
5 *
6 * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 * USA
22 */
23
24 #include <linux/scatterlist.h>
25
26 #include <scsi/sas_ata.h>
27 #include "sas_internal.h"
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_device.h>
30 #include <scsi/scsi_tcq.h>
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_sas.h>
34 #include "../scsi_sas_internal.h"
35 #include "../scsi_transport_api.h"
36 #include <scsi/scsi_eh.h>
37
38 static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
39 {
40 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
41
42 /* transport error */
43 if (ts->resp == SAS_TASK_UNDELIVERED)
44 return AC_ERR_ATA_BUS;
45
46 /* ts->resp == SAS_TASK_COMPLETE */
47 /* task delivered, what happened afterwards? */
48 switch (ts->stat) {
49 case SAS_DEV_NO_RESPONSE:
50 return AC_ERR_TIMEOUT;
51
52 case SAS_INTERRUPTED:
53 case SAS_PHY_DOWN:
54 case SAS_NAK_R_ERR:
55 return AC_ERR_ATA_BUS;
56
57
58 case SAS_DATA_UNDERRUN:
59 /*
60 * Some programs that use the taskfile interface
61 * (smartctl in particular) can cause underrun
62 * problems. Ignore these errors, perhaps at our
63 * peril.
64 */
65 return 0;
66
67 case SAS_DATA_OVERRUN:
68 case SAS_QUEUE_FULL:
69 case SAS_DEVICE_UNKNOWN:
70 case SAS_SG_ERR:
71 return AC_ERR_INVALID;
72
73 case SAM_CHECK_COND:
74 case SAS_OPEN_TO:
75 case SAS_OPEN_REJECT:
76 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
77 __FUNCTION__, ts->stat);
78 return AC_ERR_OTHER;
79
80 case SAS_ABORTED_TASK:
81 return AC_ERR_DEV;
82
83 case SAS_PROTO_RESPONSE:
84 /* This means the ending_fis has the error
85 * value; return 0 here to collect it */
86 return 0;
87 default:
88 return 0;
89 }
90 }
91
92 static void sas_ata_task_done(struct sas_task *task)
93 {
94 struct ata_queued_cmd *qc = task->uldd_task;
95 struct domain_device *dev;
96 struct task_status_struct *stat = &task->task_status;
97 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
98 struct sas_ha_struct *sas_ha;
99 enum ata_completion_errors ac;
100 unsigned long flags;
101
102 if (!qc)
103 goto qc_already_gone;
104
105 dev = qc->ap->private_data;
106 sas_ha = dev->port->ha;
107
108 spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
109 if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
110 ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
111 qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
112 dev->sata_dev.sstatus = resp->sstatus;
113 dev->sata_dev.serror = resp->serror;
114 dev->sata_dev.scontrol = resp->scontrol;
115 } else if (stat->stat != SAM_STAT_GOOD) {
116 ac = sas_to_ata_err(stat);
117 if (ac) {
118 SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
119 stat->stat);
120 /* We saw a SAS error. Send a vague error. */
121 qc->err_mask = ac;
122 dev->sata_dev.tf.feature = 0x04; /* status err */
123 dev->sata_dev.tf.command = ATA_ERR;
124 }
125 }
126
127 qc->lldd_task = NULL;
128 if (qc->scsicmd)
129 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
130 ata_qc_complete(qc);
131 spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
132
133 /*
134 * If the sas_task has an ata qc, a scsi_cmnd and the aborted
135 * flag is set, then we must have come in via the libsas EH
136 * functions. When we exit this function, we need to put the
137 * scsi_cmnd on the list of finished errors. The ata_qc_complete
138 * call cleans up the libata side of things but we're protected
139 * from the scsi_cmnd going away because the scsi_cmnd is owned
140 * by the EH, making libata's call to scsi_done a NOP.
141 */
142 spin_lock_irqsave(&task->task_state_lock, flags);
143 if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED)
144 scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q);
145 spin_unlock_irqrestore(&task->task_state_lock, flags);
146
147 qc_already_gone:
148 list_del_init(&task->list);
149 sas_free_task(task);
150 }
151
152 static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
153 {
154 int res;
155 struct sas_task *task;
156 struct domain_device *dev = qc->ap->private_data;
157 struct sas_ha_struct *sas_ha = dev->port->ha;
158 struct Scsi_Host *host = sas_ha->core.shost;
159 struct sas_internal *i = to_sas_internal(host->transportt);
160 struct scatterlist *sg;
161 unsigned int xfer = 0;
162 unsigned int si;
163
164 task = sas_alloc_task(GFP_ATOMIC);
165 if (!task)
166 return AC_ERR_SYSTEM;
167 task->dev = dev;
168 task->task_proto = SAS_PROTOCOL_STP;
169 task->task_done = sas_ata_task_done;
170
171 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
172 qc->tf.command == ATA_CMD_FPDMA_READ) {
173 /* Need to zero out the tag libata assigned us */
174 qc->tf.nsect = 0;
175 }
176
177 ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
178 task->uldd_task = qc;
179 if (ata_is_atapi(qc->tf.protocol)) {
180 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
181 <<<<<<< HEAD:drivers/scsi/libsas/sas_ata.c
182 task->total_xfer_len = qc->nbytes + qc->pad_len;
183 task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
184 =======
185 task->total_xfer_len = qc->nbytes;
186 task->num_scatter = qc->n_elem;
187 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/libsas/sas_ata.c
188 } else {
189 for_each_sg(qc->sg, sg, qc->n_elem, si)
190 xfer += sg->length;
191
192 task->total_xfer_len = xfer;
193 task->num_scatter = si;
194 }
195
196 task->data_dir = qc->dma_dir;
197 task->scatter = qc->sg;
198 task->ata_task.retry_count = 1;
199 task->task_state_flags = SAS_TASK_STATE_PENDING;
200 qc->lldd_task = task;
201
202 switch (qc->tf.protocol) {
203 case ATA_PROT_NCQ:
204 task->ata_task.use_ncq = 1;
205 /* fall through */
206 case ATAPI_PROT_DMA:
207 case ATA_PROT_DMA:
208 task->ata_task.dma_xfer = 1;
209 break;
210 }
211
212 if (qc->scsicmd)
213 ASSIGN_SAS_TASK(qc->scsicmd, task);
214
215 if (sas_ha->lldd_max_execute_num < 2)
216 res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
217 else
218 res = sas_queue_up(task);
219
220 /* Examine */
221 if (res) {
222 SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
223
224 if (qc->scsicmd)
225 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
226 sas_free_task(task);
227 return AC_ERR_SYSTEM;
228 }
229
230 return 0;
231 }
232
233 static u8 sas_ata_check_status(struct ata_port *ap)
234 {
235 struct domain_device *dev = ap->private_data;
236 return dev->sata_dev.tf.command;
237 }
238
239 static void sas_ata_phy_reset(struct ata_port *ap)
240 {
241 struct domain_device *dev = ap->private_data;
242 struct sas_internal *i =
243 to_sas_internal(dev->port->ha->core.shost->transportt);
244 <<<<<<< HEAD:drivers/scsi/libsas/sas_ata.c
245 int res = 0;
246 =======
247 int res = TMF_RESP_FUNC_FAILED;
248 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/libsas/sas_ata.c
249
250 if (i->dft->lldd_I_T_nexus_reset)
251 res = i->dft->lldd_I_T_nexus_reset(dev);
252
253 <<<<<<< HEAD:drivers/scsi/libsas/sas_ata.c
254 if (res)
255 =======
256 if (res != TMF_RESP_FUNC_COMPLETE)
257 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/libsas/sas_ata.c
258 SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
259
260 switch (dev->sata_dev.command_set) {
261 case ATA_COMMAND_SET:
262 SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
263 ap->link.device[0].class = ATA_DEV_ATA;
264 break;
265 case ATAPI_COMMAND_SET:
266 SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
267 ap->link.device[0].class = ATA_DEV_ATAPI;
268 break;
269 default:
270 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
271 __FUNCTION__,
272 dev->sata_dev.command_set);
273 ap->link.device[0].class = ATA_DEV_UNKNOWN;
274 break;
275 }
276
277 ap->cbl = ATA_CBL_SATA;
278 }
279
280 static void sas_ata_post_internal(struct ata_queued_cmd *qc)
281 {
282 if (qc->flags & ATA_QCFLAG_FAILED)
283 qc->err_mask |= AC_ERR_OTHER;
284
285 if (qc->err_mask) {
286 /*
287 * Find the sas_task and kill it. By this point,
288 * libata has decided to kill the qc, so we needn't
289 * bother with sas_ata_task_done. But we still
290 * ought to abort the task.
291 */
292 struct sas_task *task = qc->lldd_task;
293 unsigned long flags;
294
295 qc->lldd_task = NULL;
296 if (task) {
297 /* Should this be a AT(API) device reset? */
298 spin_lock_irqsave(&task->task_state_lock, flags);
299 task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
300 spin_unlock_irqrestore(&task->task_state_lock, flags);
301
302 task->uldd_task = NULL;
303 __sas_task_abort(task);
304 }
305 }
306 }
307
308 static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
309 {
310 struct domain_device *dev = ap->private_data;
311 memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
312 }
313
314 static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
315 u32 val)
316 {
317 struct domain_device *dev = ap->private_data;
318
319 SAS_DPRINTK("STUB %s\n", __FUNCTION__);
320 switch (sc_reg_in) {
321 case SCR_STATUS:
322 dev->sata_dev.sstatus = val;
323 break;
324 case SCR_CONTROL:
325 dev->sata_dev.scontrol = val;
326 break;
327 case SCR_ERROR:
328 dev->sata_dev.serror = val;
329 break;
330 case SCR_ACTIVE:
331 dev->sata_dev.ap->link.sactive = val;
332 break;
333 default:
334 return -EINVAL;
335 }
336 return 0;
337 }
338
339 static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
340 u32 *val)
341 {
342 struct domain_device *dev = ap->private_data;
343
344 SAS_DPRINTK("STUB %s\n", __FUNCTION__);
345 switch (sc_reg_in) {
346 case SCR_STATUS:
347 *val = dev->sata_dev.sstatus;
348 return 0;
349 case SCR_CONTROL:
350 *val = dev->sata_dev.scontrol;
351 return 0;
352 case SCR_ERROR:
353 *val = dev->sata_dev.serror;
354 return 0;
355 case SCR_ACTIVE:
356 *val = dev->sata_dev.ap->link.sactive;
357 return 0;
358 default:
359 return -EINVAL;
360 }
361 }
362
363 static struct ata_port_operations sas_sata_ops = {
364 .check_status = sas_ata_check_status,
365 .check_altstatus = sas_ata_check_status,
366 .dev_select = ata_noop_dev_select,
367 .phy_reset = sas_ata_phy_reset,
368 .post_internal_cmd = sas_ata_post_internal,
369 .tf_read = sas_ata_tf_read,
370 .qc_prep = ata_noop_qc_prep,
371 .qc_issue = sas_ata_qc_issue,
372 .port_start = ata_sas_port_start,
373 .port_stop = ata_sas_port_stop,
374 .scr_read = sas_ata_scr_read,
375 .scr_write = sas_ata_scr_write
376 };
377
378 static struct ata_port_info sata_port_info = {
379 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
380 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
381 .pio_mask = 0x1f, /* PIO0-4 */
382 .mwdma_mask = 0x07, /* MWDMA0-2 */
383 .udma_mask = ATA_UDMA6,
384 .port_ops = &sas_sata_ops
385 };
386
387 int sas_ata_init_host_and_port(struct domain_device *found_dev,
388 struct scsi_target *starget)
389 {
390 struct Scsi_Host *shost = dev_to_shost(&starget->dev);
391 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
392 struct ata_port *ap;
393
394 ata_host_init(&found_dev->sata_dev.ata_host,
395 ha->dev,
396 sata_port_info.flags,
397 &sas_sata_ops);
398 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
399 &sata_port_info,
400 shost);
401 if (!ap) {
402 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
403 return -ENODEV;
404 }
405
406 ap->private_data = found_dev;
407 ap->cbl = ATA_CBL_SATA;
408 ap->scsi_host = shost;
409 found_dev->sata_dev.ap = ap;
410
411 return 0;
412 }
413
414 void sas_ata_task_abort(struct sas_task *task)
415 {
416 struct ata_queued_cmd *qc = task->uldd_task;
417 struct completion *waiting;
418
419 /* Bounce SCSI-initiated commands to the SCSI EH */
420 if (qc->scsicmd) {
421 scsi_req_abort_cmd(qc->scsicmd);
422 scsi_schedule_eh(qc->scsicmd->device->host);
423 return;
424 }
425
426 /* Internal command, fake a timeout and complete. */
427 qc->flags &= ~ATA_QCFLAG_ACTIVE;
428 qc->flags |= ATA_QCFLAG_FAILED;
429 qc->err_mask |= AC_ERR_TIMEOUT;
430 waiting = qc->private_data;
431 complete(waiting);
432 }
433
434 static void sas_task_timedout(unsigned long _task)
435 {
436 struct sas_task *task = (void *) _task;
437 unsigned long flags;
438
439 spin_lock_irqsave(&task->task_state_lock, flags);
440 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
441 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
442 spin_unlock_irqrestore(&task->task_state_lock, flags);
443
444 complete(&task->completion);
445 }
446
447 static void sas_disc_task_done(struct sas_task *task)
448 {
449 if (!del_timer(&task->timer))
450 return;
451 complete(&task->completion);
452 }
453
454 #define SAS_DEV_TIMEOUT 10
455
456 /**
457 * sas_execute_task -- Basic task processing for discovery
458 * @task: the task to be executed
459 * @buffer: pointer to buffer to do I/O
460 * @size: size of @buffer
461 * @dma_dir: DMA direction. DMA_xxx
462 */
463 static int sas_execute_task(struct sas_task *task, void *buffer, int size,
464 enum dma_data_direction dma_dir)
465 {
466 int res = 0;
467 struct scatterlist *scatter = NULL;
468 struct task_status_struct *ts = &task->task_status;
469 int num_scatter = 0;
470 int retries = 0;
471 struct sas_internal *i =
472 to_sas_internal(task->dev->port->ha->core.shost->transportt);
473
474 if (dma_dir != DMA_NONE) {
475 scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
476 if (!scatter)
477 goto out;
478
479 sg_init_one(scatter, buffer, size);
480 num_scatter = 1;
481 }
482
483 task->task_proto = task->dev->tproto;
484 task->scatter = scatter;
485 task->num_scatter = num_scatter;
486 task->total_xfer_len = size;
487 task->data_dir = dma_dir;
488 task->task_done = sas_disc_task_done;
489 if (dma_dir != DMA_NONE &&
490 sas_protocol_ata(task->task_proto)) {
491 task->num_scatter = dma_map_sg(task->dev->port->ha->dev,
492 task->scatter,
493 task->num_scatter,
494 task->data_dir);
495 }
496
497 for (retries = 0; retries < 5; retries++) {
498 task->task_state_flags = SAS_TASK_STATE_PENDING;
499 init_completion(&task->completion);
500
501 task->timer.data = (unsigned long) task;
502 task->timer.function = sas_task_timedout;
503 task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
504 add_timer(&task->timer);
505
506 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
507 if (res) {
508 del_timer(&task->timer);
509 SAS_DPRINTK("executing SAS discovery task failed:%d\n",
510 res);
511 goto ex_err;
512 }
513 wait_for_completion(&task->completion);
514 res = -ECOMM;
515 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
516 int res2;
517 SAS_DPRINTK("task aborted, flags:0x%x\n",
518 task->task_state_flags);
519 res2 = i->dft->lldd_abort_task(task);
520 SAS_DPRINTK("came back from abort task\n");
521 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
522 if (res2 == TMF_RESP_FUNC_COMPLETE)
523 continue; /* Retry the task */
524 else
525 goto ex_err;
526 }
527 }
528 if (task->task_status.stat == SAM_BUSY ||
529 task->task_status.stat == SAM_TASK_SET_FULL ||
530 task->task_status.stat == SAS_QUEUE_FULL) {
531 SAS_DPRINTK("task: q busy, sleeping...\n");
532 schedule_timeout_interruptible(HZ);
533 } else if (task->task_status.stat == SAM_CHECK_COND) {
534 struct scsi_sense_hdr shdr;
535
536 if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
537 &shdr)) {
538 SAS_DPRINTK("couldn't normalize sense\n");
539 continue;
540 }
541 if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
542 (shdr.sense_key == 2 && shdr.asc == 4 &&
543 shdr.ascq == 1)) {
544 SAS_DPRINTK("device %016llx LUN: %016llx "
545 "powering up or not ready yet, "
546 "sleeping...\n",
547 SAS_ADDR(task->dev->sas_addr),
548 SAS_ADDR(task->ssp_task.LUN));
549
550 schedule_timeout_interruptible(5*HZ);
551 } else if (shdr.sense_key == 1) {
552 res = 0;
553 break;
554 } else if (shdr.sense_key == 5) {
555 break;
556 } else {
557 SAS_DPRINTK("dev %016llx LUN: %016llx "
558 "sense key:0x%x ASC:0x%x ASCQ:0x%x"
559 "\n",
560 SAS_ADDR(task->dev->sas_addr),
561 SAS_ADDR(task->ssp_task.LUN),
562 shdr.sense_key,
563 shdr.asc, shdr.ascq);
564 }
565 } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
566 task->task_status.stat != SAM_GOOD) {
567 SAS_DPRINTK("task finished with resp:0x%x, "
568 "stat:0x%x\n",
569 task->task_status.resp,
570 task->task_status.stat);
571 goto ex_err;
572 } else {
573 res = 0;
574 break;
575 }
576 }
577 ex_err:
578 if (dma_dir != DMA_NONE) {
579 if (sas_protocol_ata(task->task_proto))
580 dma_unmap_sg(task->dev->port->ha->dev,
581 task->scatter, task->num_scatter,
582 task->data_dir);
583 kfree(scatter);
584 }
585 out:
586 return res;
587 }
588
589 /* ---------- SATA ---------- */
590
591 static void sas_get_ata_command_set(struct domain_device *dev)
592 {
593 struct dev_to_host_fis *fis =
594 (struct dev_to_host_fis *) dev->frame_rcvd;
595
596 if ((fis->sector_count == 1 && /* ATA */
597 fis->lbal == 1 &&
598 fis->lbam == 0 &&
599 fis->lbah == 0 &&
600 fis->device == 0)
601 ||
602 (fis->sector_count == 0 && /* CE-ATA (mATA) */
603 fis->lbal == 0 &&
604 fis->lbam == 0xCE &&
605 fis->lbah == 0xAA &&
606 (fis->device & ~0x10) == 0))
607
608 dev->sata_dev.command_set = ATA_COMMAND_SET;
609
610 else if ((fis->interrupt_reason == 1 && /* ATAPI */
611 fis->lbal == 1 &&
612 fis->byte_count_low == 0x14 &&
613 fis->byte_count_high == 0xEB &&
614 (fis->device & ~0x10) == 0))
615
616 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
617
618 else if ((fis->sector_count == 1 && /* SEMB */
619 fis->lbal == 1 &&
620 fis->lbam == 0x3C &&
621 fis->lbah == 0xC3 &&
622 fis->device == 0)
623 ||
624 (fis->interrupt_reason == 1 && /* SATA PM */
625 fis->lbal == 1 &&
626 fis->byte_count_low == 0x69 &&
627 fis->byte_count_high == 0x96 &&
628 (fis->device & ~0x10) == 0))
629
630 /* Treat it as a superset? */
631 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
632 }
633
634 /**
635 * sas_issue_ata_cmd -- Basic SATA command processing for discovery
636 * @dev: the device to send the command to
637 * @command: the command register
638 * @features: the features register
639 * @buffer: pointer to buffer to do I/O
640 * @size: size of @buffer
641 * @dma_dir: DMA direction. DMA_xxx
642 */
643 static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
644 u8 features, void *buffer, int size,
645 enum dma_data_direction dma_dir)
646 {
647 int res = 0;
648 struct sas_task *task;
649 struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
650 &dev->frame_rcvd[0];
651
652 res = -ENOMEM;
653 task = sas_alloc_task(GFP_KERNEL);
654 if (!task)
655 goto out;
656
657 task->dev = dev;
658
659 task->ata_task.fis.fis_type = 0x27;
660 task->ata_task.fis.command = command;
661 task->ata_task.fis.features = features;
662 task->ata_task.fis.device = d2h_fis->device;
663 task->ata_task.retry_count = 1;
664
665 res = sas_execute_task(task, buffer, size, dma_dir);
666
667 sas_free_task(task);
668 out:
669 return res;
670 }
671
672 <<<<<<< HEAD:drivers/scsi/libsas/sas_ata.c
673 static void sas_sata_propagate_sas_addr(struct domain_device *dev)
674 {
675 unsigned long flags;
676 struct asd_sas_port *port = dev->port;
677 struct asd_sas_phy *phy;
678
679 BUG_ON(dev->parent);
680
681 memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
682 spin_lock_irqsave(&port->phy_list_lock, flags);
683 list_for_each_entry(phy, &port->phy_list, port_phy_el)
684 memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
685 spin_unlock_irqrestore(&port->phy_list_lock, flags);
686 }
687
688 =======
689 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/libsas/sas_ata.c
690 #define ATA_IDENTIFY_DEV 0xEC
691 #define ATA_IDENTIFY_PACKET_DEV 0xA1
692 #define ATA_SET_FEATURES 0xEF
693 #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
694
695 /**
696 * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
697 * @dev: STP/SATA device of interest (ATA/ATAPI)
698 *
699 * The LLDD has already been notified of this device, so that we can
700 * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
701 * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
702 * performance for this device.
703 */
704 static int sas_discover_sata_dev(struct domain_device *dev)
705 {
706 int res;
707 __le16 *identify_x;
708 u8 command;
709
710 identify_x = kzalloc(512, GFP_KERNEL);
711 if (!identify_x)
712 return -ENOMEM;
713
714 if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
715 dev->sata_dev.identify_device = identify_x;
716 command = ATA_IDENTIFY_DEV;
717 } else {
718 dev->sata_dev.identify_packet_device = identify_x;
719 command = ATA_IDENTIFY_PACKET_DEV;
720 }
721
722 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
723 DMA_FROM_DEVICE);
724 if (res)
725 goto out_err;
726
727 /* lives on the media? */
728 if (le16_to_cpu(identify_x[0]) & 4) {
729 /* incomplete response */
730 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
731 "dev %llx\n", SAS_ADDR(dev->sas_addr));
732 if (!le16_to_cpu(identify_x[83] & (1<<6)))
733 goto cont1;
734 res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
735 ATA_FEATURE_PUP_STBY_SPIN_UP,
736 NULL, 0, DMA_NONE);
737 if (res)
738 goto cont1;
739
740 schedule_timeout_interruptible(5*HZ); /* More time? */
741 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
742 DMA_FROM_DEVICE);
743 if (res)
744 goto out_err;
745 }
746 cont1:
747 <<<<<<< HEAD:drivers/scsi/libsas/sas_ata.c
748 /* Get WWN */
749 if (dev->port->oob_mode != SATA_OOB_MODE) {
750 memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
751 SAS_ADDR_SIZE);
752 } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
753 (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
754 == 0x5000) {
755 int i;
756
757 for (i = 0; i < 4; i++) {
758 dev->sas_addr[2*i] =
759 (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
760 dev->sas_addr[2*i+1] =
761 le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
762 }
763 }
764 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
765 if (!dev->parent)
766 sas_sata_propagate_sas_addr(dev);
767
768 =======
769 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/libsas/sas_ata.c
770 /* XXX Hint: register this SATA device with SATL.
771 When this returns, dev->sata_dev->lu is alive and
772 present.
773 sas_satl_register_dev(dev);
774 */
775
776 sas_fill_in_rphy(dev, dev->rphy);
777
778 return 0;
779 out_err:
780 dev->sata_dev.identify_packet_device = NULL;
781 dev->sata_dev.identify_device = NULL;
782 kfree(identify_x);
783 return res;
784 }
785
786 static int sas_discover_sata_pm(struct domain_device *dev)
787 {
788 return -ENODEV;
789 }
790
791 /**
792 * sas_discover_sata -- discover an STP/SATA domain device
793 * @dev: pointer to struct domain_device of interest
794 *
795 * First we notify the LLDD of this device, so we can send frames to
796 * it. Then depending on the type of device we call the appropriate
797 * discover functions. Once device discover is done, we notify the
798 * LLDD so that it can fine-tune its parameters for the device, by
799 * removing it and then adding it. That is, the second time around,
800 * the driver would have certain fields, that it is looking at, set.
801 * Finally we initialize the kobj so that the device can be added to
802 * the system at registration time. Devices directly attached to a HA
803 * port, have no parents. All other devices do, and should have their
804 * "parent" pointer set appropriately before calling this function.
805 */
806 int sas_discover_sata(struct domain_device *dev)
807 {
808 int res;
809
810 sas_get_ata_command_set(dev);
811
812 res = sas_notify_lldd_dev_found(dev);
813 if (res)
814 return res;
815
816 switch (dev->dev_type) {
817 case SATA_DEV:
818 res = sas_discover_sata_dev(dev);
819 break;
820 case SATA_PM:
821 res = sas_discover_sata_pm(dev);
822 break;
823 default:
824 break;
825 }
826 sas_notify_lldd_dev_gone(dev);
827 if (!res) {
828 sas_notify_lldd_dev_found(dev);
829 res = sas_rphy_add(dev->rphy);
830 }
831
832 return res;
833 }
WRT350N Kernel Patches