blob: 03930a04a679e88679dc037b055027410a4dca63 [file] [log] [blame]
Darrick J. Wong338ec572006-10-18 14:43:37 -07001/*
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
James Bottomleyb9142172007-07-22 13:15:55 -050024#include <linux/scatterlist.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
James Bottomleyb9142172007-07-22 13:15:55 -050026
Darrick J. Wong338ec572006-10-18 14:43:37 -070027#include <scsi/sas_ata.h>
28#include "sas_internal.h"
29#include <scsi/scsi_host.h>
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_tcq.h>
32#include <scsi/scsi.h>
33#include <scsi/scsi_transport.h>
34#include <scsi/scsi_transport_sas.h>
35#include "../scsi_sas_internal.h"
Darrick J. Wong3a2755a2007-01-30 01:18:58 -080036#include "../scsi_transport_api.h"
37#include <scsi/scsi_eh.h>
Darrick J. Wong338ec572006-10-18 14:43:37 -070038
39static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
40{
41 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
42
43 /* transport error */
44 if (ts->resp == SAS_TASK_UNDELIVERED)
45 return AC_ERR_ATA_BUS;
46
47 /* ts->resp == SAS_TASK_COMPLETE */
48 /* task delivered, what happened afterwards? */
49 switch (ts->stat) {
50 case SAS_DEV_NO_RESPONSE:
51 return AC_ERR_TIMEOUT;
52
53 case SAS_INTERRUPTED:
54 case SAS_PHY_DOWN:
55 case SAS_NAK_R_ERR:
56 return AC_ERR_ATA_BUS;
57
58
59 case SAS_DATA_UNDERRUN:
60 /*
61 * Some programs that use the taskfile interface
62 * (smartctl in particular) can cause underrun
63 * problems. Ignore these errors, perhaps at our
64 * peril.
65 */
66 return 0;
67
68 case SAS_DATA_OVERRUN:
69 case SAS_QUEUE_FULL:
70 case SAS_DEVICE_UNKNOWN:
71 case SAS_SG_ERR:
72 return AC_ERR_INVALID;
73
Darrick J. Wong338ec572006-10-18 14:43:37 -070074 case SAS_OPEN_TO:
75 case SAS_OPEN_REJECT:
76 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -070077 __func__, ts->stat);
Darrick J. Wong338ec572006-10-18 14:43:37 -070078 return AC_ERR_OTHER;
79
James Bottomley75c0b382011-01-23 08:16:24 -060080 case SAM_STAT_CHECK_CONDITION:
Darrick J. Wong338ec572006-10-18 14:43:37 -070081 case SAS_ABORTED_TASK:
82 return AC_ERR_DEV;
83
84 case SAS_PROTO_RESPONSE:
85 /* This means the ending_fis has the error
86 * value; return 0 here to collect it */
87 return 0;
88 default:
89 return 0;
90 }
91}
92
93static void sas_ata_task_done(struct sas_task *task)
94{
95 struct ata_queued_cmd *qc = task->uldd_task;
Dan Williams9095a642011-11-28 11:29:20 -080096 struct domain_device *dev = task->dev;
Darrick J. Wong338ec572006-10-18 14:43:37 -070097 struct task_status_struct *stat = &task->task_status;
98 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
Dan Williams9095a642011-11-28 11:29:20 -080099 struct sas_ha_struct *sas_ha = dev->port->ha;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700100 enum ata_completion_errors ac;
Darrick J. Wong3eb7a512007-01-30 01:18:35 -0800101 unsigned long flags;
Xiangliang Yubb650a12011-05-08 19:27:01 +0800102 struct ata_link *link;
Dan Williams3dff5722011-11-28 12:08:22 -0800103 struct ata_port *ap;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700104
Dan Williams9095a642011-11-28 11:29:20 -0800105 spin_lock_irqsave(&dev->done_lock, flags);
106 if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
107 task = NULL;
108 else if (qc && qc->scsicmd)
109 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
110 spin_unlock_irqrestore(&dev->done_lock, flags);
111
112 /* check if libsas-eh got to the task before us */
113 if (unlikely(!task))
114 return;
115
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800116 if (!qc)
117 goto qc_already_gone;
118
Dan Williams3dff5722011-11-28 12:08:22 -0800119 ap = qc->ap;
Dan Williams3dff5722011-11-28 12:08:22 -0800120 link = &ap->link;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800121
Dan Williams3dff5722011-11-28 12:08:22 -0800122 spin_lock_irqsave(ap->lock, flags);
123 /* check if we lost the race with libata/sas_ata_post_internal() */
124 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
125 spin_unlock_irqrestore(ap->lock, flags);
126 if (qc->scsicmd)
127 goto qc_already_gone;
128 else {
129 /* if eh is not involved and the port is frozen then the
130 * ata internal abort process has taken responsibility
131 * for this sas_task
132 */
133 return;
134 }
135 }
136
James Bottomley75c0b382011-01-23 08:16:24 -0600137 if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
138 ((stat->stat == SAM_STAT_CHECK_CONDITION &&
139 dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700140 ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
Xiangliang Yubb650a12011-05-08 19:27:01 +0800141
142 if (!link->sactive) {
143 qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
144 } else {
145 link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command);
146 if (unlikely(link->eh_info.err_mask))
147 qc->flags |= ATA_QCFLAG_FAILED;
148 }
James Bottomley75c0b382011-01-23 08:16:24 -0600149 } else {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700150 ac = sas_to_ata_err(stat);
151 if (ac) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700152 SAS_DPRINTK("%s: SAS error %x\n", __func__,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700153 stat->stat);
154 /* We saw a SAS error. Send a vague error. */
Xiangliang Yubb650a12011-05-08 19:27:01 +0800155 if (!link->sactive) {
156 qc->err_mask = ac;
157 } else {
158 link->eh_info.err_mask |= AC_ERR_DEV;
159 qc->flags |= ATA_QCFLAG_FAILED;
160 }
161
Darrick J. Wong338ec572006-10-18 14:43:37 -0700162 dev->sata_dev.tf.feature = 0x04; /* status err */
163 dev->sata_dev.tf.command = ATA_ERR;
164 }
165 }
166
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800167 qc->lldd_task = NULL;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700168 ata_qc_complete(qc);
Dan Williams3dff5722011-11-28 12:08:22 -0800169 spin_unlock_irqrestore(ap->lock, flags);
Darrick J. Wong3eb7a512007-01-30 01:18:35 -0800170
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800171qc_already_gone:
Darrick J. Wong338ec572006-10-18 14:43:37 -0700172 list_del_init(&task->list);
173 sas_free_task(task);
174}
175
176static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
177{
Dan Williams312d3e52011-11-17 17:59:50 -0800178 unsigned long flags;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700179 struct sas_task *task;
Dan Williams312d3e52011-11-17 17:59:50 -0800180 struct scatterlist *sg;
181 int ret = AC_ERR_SYSTEM;
182 unsigned int si, xfer = 0;
183 struct ata_port *ap = qc->ap;
184 struct domain_device *dev = ap->private_data;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700185 struct sas_ha_struct *sas_ha = dev->port->ha;
186 struct Scsi_Host *host = sas_ha->core.shost;
187 struct sas_internal *i = to_sas_internal(host->transportt);
Dan Williams312d3e52011-11-17 17:59:50 -0800188
189 /* TODO: audit callers to ensure they are ready for qc_issue to
190 * unconditionally re-enable interrupts
191 */
192 local_irq_save(flags);
193 spin_unlock(ap->lock);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700194
Darrick J. Wong56dd2c02010-10-01 13:55:47 -0700195 /* If the device fell off, no sense in issuing commands */
Dan Williamse1399422012-01-07 08:52:39 +0000196 if (test_bit(SAS_DEV_GONE, &dev->state))
Dan Williams312d3e52011-11-17 17:59:50 -0800197 goto out;
Darrick J. Wong56dd2c02010-10-01 13:55:47 -0700198
Darrick J. Wong338ec572006-10-18 14:43:37 -0700199 task = sas_alloc_task(GFP_ATOMIC);
200 if (!task)
Dan Williams312d3e52011-11-17 17:59:50 -0800201 goto out;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700202 task->dev = dev;
203 task->task_proto = SAS_PROTOCOL_STP;
204 task->task_done = sas_ata_task_done;
205
206 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
207 qc->tf.command == ATA_CMD_FPDMA_READ) {
208 /* Need to zero out the tag libata assigned us */
209 qc->tf.nsect = 0;
210 }
211
James Bottomley110dd8f2007-07-20 13:11:44 -0500212 ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700213 task->uldd_task = qc;
Tejun Heo405e66b2007-11-27 19:28:53 +0900214 if (ata_is_atapi(qc->tf.protocol)) {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700215 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
James Bottomleydde20202008-02-19 11:36:56 +0100216 task->total_xfer_len = qc->nbytes;
217 task->num_scatter = qc->n_elem;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700218 } else {
Tejun Heoff2aeb12007-12-05 16:43:11 +0900219 for_each_sg(qc->sg, sg, qc->n_elem, si)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700220 xfer += sg->length;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700221
222 task->total_xfer_len = xfer;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900223 task->num_scatter = si;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700224 }
225
226 task->data_dir = qc->dma_dir;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900227 task->scatter = qc->sg;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700228 task->ata_task.retry_count = 1;
229 task->task_state_flags = SAS_TASK_STATE_PENDING;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800230 qc->lldd_task = task;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700231
232 switch (qc->tf.protocol) {
233 case ATA_PROT_NCQ:
234 task->ata_task.use_ncq = 1;
235 /* fall through */
Tejun Heo0dc36882007-12-18 16:34:43 -0500236 case ATAPI_PROT_DMA:
Darrick J. Wong338ec572006-10-18 14:43:37 -0700237 case ATA_PROT_DMA:
238 task->ata_task.dma_xfer = 1;
239 break;
240 }
241
Darrick J. Wongfe059f12007-01-30 01:18:55 -0800242 if (qc->scsicmd)
243 ASSIGN_SAS_TASK(qc->scsicmd, task);
244
Darrick J. Wong338ec572006-10-18 14:43:37 -0700245 if (sas_ha->lldd_max_execute_num < 2)
Dan Williams312d3e52011-11-17 17:59:50 -0800246 ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700247 else
Dan Williams312d3e52011-11-17 17:59:50 -0800248 ret = sas_queue_up(task);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700249
250 /* Examine */
Dan Williams312d3e52011-11-17 17:59:50 -0800251 if (ret) {
252 SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700253
Darrick J. Wongfe059f12007-01-30 01:18:55 -0800254 if (qc->scsicmd)
255 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700256 sas_free_task(task);
Dan Williams312d3e52011-11-17 17:59:50 -0800257 ret = AC_ERR_SYSTEM;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700258 }
259
Dan Williams312d3e52011-11-17 17:59:50 -0800260 out:
261 spin_lock(ap->lock);
262 local_irq_restore(flags);
263 return ret;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700264}
265
Tejun Heo4c9bf4e2008-04-07 22:47:20 +0900266static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
267{
268 struct domain_device *dev = qc->ap->private_data;
269
270 memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf));
271 return true;
272}
273
James Bottomley00dd4992011-01-23 09:44:12 -0600274static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
275 unsigned long deadline)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700276{
James Bottomley00dd4992011-01-23 09:44:12 -0600277 struct ata_port *ap = link->ap;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700278 struct domain_device *dev = ap->private_data;
279 struct sas_internal *i =
280 to_sas_internal(dev->port->ha->core.shost->transportt);
James Bottomleya29c0512008-02-23 23:38:44 -0600281 int res = TMF_RESP_FUNC_FAILED;
James Bottomley00dd4992011-01-23 09:44:12 -0600282 int ret = 0;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700283
284 if (i->dft->lldd_I_T_nexus_reset)
285 res = i->dft->lldd_I_T_nexus_reset(dev);
286
James Bottomley00dd4992011-01-23 09:44:12 -0600287 if (res != TMF_RESP_FUNC_COMPLETE) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700288 SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__);
James Bottomley00dd4992011-01-23 09:44:12 -0600289 ret = -EAGAIN;
290 }
Darrick J. Wong338ec572006-10-18 14:43:37 -0700291
292 switch (dev->sata_dev.command_set) {
293 case ATA_COMMAND_SET:
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700294 SAS_DPRINTK("%s: Found ATA device.\n", __func__);
James Bottomley00dd4992011-01-23 09:44:12 -0600295 *class = ATA_DEV_ATA;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700296 break;
297 case ATAPI_COMMAND_SET:
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700298 SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
James Bottomley00dd4992011-01-23 09:44:12 -0600299 *class = ATA_DEV_ATAPI;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700300 break;
301 default:
302 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700303 __func__,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700304 dev->sata_dev.command_set);
James Bottomley00dd4992011-01-23 09:44:12 -0600305 *class = ATA_DEV_UNKNOWN;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700306 break;
307 }
308
309 ap->cbl = ATA_CBL_SATA;
James Bottomley00dd4992011-01-23 09:44:12 -0600310 return ret;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700311}
312
Dave Jiang1ca1e432011-05-24 13:18:04 -0700313static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class,
314 unsigned long deadline)
315{
316 struct ata_port *ap = link->ap;
317 struct domain_device *dev = ap->private_data;
318 struct sas_internal *i =
319 to_sas_internal(dev->port->ha->core.shost->transportt);
320 int res = TMF_RESP_FUNC_FAILED;
321 int ret = 0;
322
323 if (i->dft->lldd_ata_soft_reset)
324 res = i->dft->lldd_ata_soft_reset(dev);
325
326 if (res != TMF_RESP_FUNC_COMPLETE) {
327 SAS_DPRINTK("%s: Unable to soft reset\n", __func__);
328 ret = -EAGAIN;
329 }
330
331 switch (dev->sata_dev.command_set) {
332 case ATA_COMMAND_SET:
333 SAS_DPRINTK("%s: Found ATA device.\n", __func__);
334 *class = ATA_DEV_ATA;
335 break;
336 case ATAPI_COMMAND_SET:
337 SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
338 *class = ATA_DEV_ATAPI;
339 break;
340 default:
341 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
342 __func__, dev->sata_dev.command_set);
343 *class = ATA_DEV_UNKNOWN;
344 break;
345 }
346
347 ap->cbl = ATA_CBL_SATA;
348 return ret;
349}
350
Dan Williams3dff5722011-11-28 12:08:22 -0800351/*
352 * notify the lldd to forget the sas_task for this internal ata command
353 * that bypasses scsi-eh
354 */
355static void sas_ata_internal_abort(struct sas_task *task)
356{
357 struct sas_internal *si =
358 to_sas_internal(task->dev->port->ha->core.shost->transportt);
359 unsigned long flags;
360 int res;
361
362 spin_lock_irqsave(&task->task_state_lock, flags);
363 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
364 task->task_state_flags & SAS_TASK_STATE_DONE) {
365 spin_unlock_irqrestore(&task->task_state_lock, flags);
366 SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
367 task);
368 goto out;
369 }
370 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
371 spin_unlock_irqrestore(&task->task_state_lock, flags);
372
373 res = si->dft->lldd_abort_task(task);
374
375 spin_lock_irqsave(&task->task_state_lock, flags);
376 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
377 res == TMF_RESP_FUNC_COMPLETE) {
378 spin_unlock_irqrestore(&task->task_state_lock, flags);
379 goto out;
380 }
381
382 /* XXX we are not prepared to deal with ->lldd_abort_task()
383 * failures. TODO: lldds need to unconditionally forget about
384 * aborted ata tasks, otherwise we (likely) leak the sas task
385 * here
386 */
387 SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
388
389 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
390 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
391 spin_unlock_irqrestore(&task->task_state_lock, flags);
392
393 return;
394 out:
395 list_del_init(&task->list);
396 sas_free_task(task);
397}
398
Darrick J. Wong338ec572006-10-18 14:43:37 -0700399static void sas_ata_post_internal(struct ata_queued_cmd *qc)
400{
401 if (qc->flags & ATA_QCFLAG_FAILED)
402 qc->err_mask |= AC_ERR_OTHER;
403
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800404 if (qc->err_mask) {
405 /*
Dan Williams3dff5722011-11-28 12:08:22 -0800406 * Find the sas_task and kill it. By this point, libata
407 * has decided to kill the qc and has frozen the port.
408 * In this state sas_ata_task_done() will no longer free
409 * the sas_task, so we need to notify the lldd (via
410 * ->lldd_abort_task) that the task is dead and free it
411 * ourselves.
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800412 */
413 struct sas_task *task = qc->lldd_task;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800414
415 qc->lldd_task = NULL;
Dan Williams3a2cdf32011-11-29 14:54:28 -0800416 if (!task)
417 return;
418 task->uldd_task = NULL;
419 sas_ata_internal_abort(task);
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800420 }
Darrick J. Wong338ec572006-10-18 14:43:37 -0700421}
422
Dan Williamsb91bb292011-11-17 17:59:52 -0800423
424static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
425{
426 struct domain_device *dev = ap->private_data;
427 struct sas_internal *i =
428 to_sas_internal(dev->port->ha->core.shost->transportt);
429
430 if (i->dft->lldd_ata_set_dmamode)
431 i->dft->lldd_ata_set_dmamode(dev);
432}
433
Darrick J. Wong338ec572006-10-18 14:43:37 -0700434static struct ata_port_operations sas_sata_ops = {
James Bottomley00dd4992011-01-23 09:44:12 -0600435 .prereset = ata_std_prereset,
Dave Jiang1ca1e432011-05-24 13:18:04 -0700436 .softreset = sas_ata_soft_reset,
James Bottomley00dd4992011-01-23 09:44:12 -0600437 .hardreset = sas_ata_hard_reset,
438 .postreset = ata_std_postreset,
439 .error_handler = ata_std_error_handler,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700440 .post_internal_cmd = sas_ata_post_internal,
David Milburnf0ad30d2010-09-03 17:13:03 -0500441 .qc_defer = ata_std_qc_defer,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700442 .qc_prep = ata_noop_qc_prep,
443 .qc_issue = sas_ata_qc_issue,
Tejun Heo4c9bf4e2008-04-07 22:47:20 +0900444 .qc_fill_rtf = sas_ata_qc_fill_rtf,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700445 .port_start = ata_sas_port_start,
446 .port_stop = ata_sas_port_stop,
Dan Williamsb91bb292011-11-17 17:59:52 -0800447 .set_dmamode = sas_ata_set_dmamode,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700448};
449
450static struct ata_port_info sata_port_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300451 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
Sergei Shtylyov0f2e0332011-01-21 20:32:01 +0300452 .pio_mask = ATA_PIO4,
453 .mwdma_mask = ATA_MWDMA2,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700454 .udma_mask = ATA_UDMA6,
455 .port_ops = &sas_sata_ops
456};
457
458int sas_ata_init_host_and_port(struct domain_device *found_dev,
459 struct scsi_target *starget)
460{
461 struct Scsi_Host *shost = dev_to_shost(&starget->dev);
462 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
463 struct ata_port *ap;
464
465 ata_host_init(&found_dev->sata_dev.ata_host,
Jeff Garzik1d1bbee2007-07-26 09:28:37 -0400466 ha->dev,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700467 sata_port_info.flags,
468 &sas_sata_ops);
469 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
470 &sata_port_info,
471 shost);
472 if (!ap) {
473 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
474 return -ENODEV;
475 }
476
477 ap->private_data = found_dev;
478 ap->cbl = ATA_CBL_SATA;
479 ap->scsi_host = shost;
480 found_dev->sata_dev.ap = ap;
481
482 return 0;
483}
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800484
485void sas_ata_task_abort(struct sas_task *task)
486{
487 struct ata_queued_cmd *qc = task->uldd_task;
488 struct completion *waiting;
489
490 /* Bounce SCSI-initiated commands to the SCSI EH */
491 if (qc->scsicmd) {
James Bottomley1b4d0d82010-05-13 09:31:54 -0500492 struct request_queue *q = qc->scsicmd->device->request_queue;
493 unsigned long flags;
494
Tejun Heo70b25f82010-04-15 09:00:08 +0900495 spin_lock_irqsave(q->queue_lock, flags);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700496 blk_abort_request(qc->scsicmd->request);
Tejun Heo70b25f82010-04-15 09:00:08 +0900497 spin_unlock_irqrestore(q->queue_lock, flags);
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800498 scsi_schedule_eh(qc->scsicmd->device->host);
499 return;
500 }
501
502 /* Internal command, fake a timeout and complete. */
503 qc->flags &= ~ATA_QCFLAG_ACTIVE;
504 qc->flags |= ATA_QCFLAG_FAILED;
505 qc->err_mask |= AC_ERR_TIMEOUT;
506 waiting = qc->private_data;
507 complete(waiting);
508}
James Bottomleyb9142172007-07-22 13:15:55 -0500509
James Bottomleyb9142172007-07-22 13:15:55 -0500510static void sas_get_ata_command_set(struct domain_device *dev)
511{
512 struct dev_to_host_fis *fis =
513 (struct dev_to_host_fis *) dev->frame_rcvd;
514
515 if ((fis->sector_count == 1 && /* ATA */
516 fis->lbal == 1 &&
517 fis->lbam == 0 &&
518 fis->lbah == 0 &&
519 fis->device == 0)
520 ||
521 (fis->sector_count == 0 && /* CE-ATA (mATA) */
522 fis->lbal == 0 &&
523 fis->lbam == 0xCE &&
524 fis->lbah == 0xAA &&
525 (fis->device & ~0x10) == 0))
526
527 dev->sata_dev.command_set = ATA_COMMAND_SET;
528
529 else if ((fis->interrupt_reason == 1 && /* ATAPI */
530 fis->lbal == 1 &&
531 fis->byte_count_low == 0x14 &&
532 fis->byte_count_high == 0xEB &&
533 (fis->device & ~0x10) == 0))
534
535 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
536
537 else if ((fis->sector_count == 1 && /* SEMB */
538 fis->lbal == 1 &&
539 fis->lbam == 0x3C &&
540 fis->lbah == 0xC3 &&
541 fis->device == 0)
542 ||
543 (fis->interrupt_reason == 1 && /* SATA PM */
544 fis->lbal == 1 &&
545 fis->byte_count_low == 0x69 &&
546 fis->byte_count_high == 0x96 &&
547 (fis->device & ~0x10) == 0))
548
549 /* Treat it as a superset? */
550 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
551}
552
Dan Williams87c83312011-11-17 17:59:51 -0800553void sas_probe_sata(struct work_struct *work)
554{
555 struct domain_device *dev, *n;
556 struct sas_discovery_event *ev =
557 container_of(work, struct sas_discovery_event, work);
558 struct asd_sas_port *port = ev->port;
559
560 clear_bit(DISCE_PROBE, &port->disc.pending);
561
562 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
563 int err;
564
565 spin_lock_irq(&port->dev_list_lock);
566 list_add_tail(&dev->dev_list_node, &port->dev_list);
567 spin_unlock_irq(&port->dev_list_lock);
568
569 err = sas_rphy_add(dev->rphy);
570
571 if (err) {
572 SAS_DPRINTK("%s: for %s device %16llx returned %d\n",
573 __func__, dev->parent ? "exp-attached" :
574 "direct-attached",
575 SAS_ADDR(dev->sas_addr), err);
576 sas_unregister_dev(port, dev);
577 } else
578 list_del_init(&dev->disco_list_node);
579 }
580}
581
James Bottomleyb9142172007-07-22 13:15:55 -0500582/**
583 * sas_discover_sata -- discover an STP/SATA domain device
584 * @dev: pointer to struct domain_device of interest
585 *
Dan Williamsb91bb292011-11-17 17:59:52 -0800586 * Devices directly attached to a HA port, have no parents. All other
587 * devices do, and should have their "parent" pointer set appropriately
588 * before calling this function.
James Bottomleyb9142172007-07-22 13:15:55 -0500589 */
590int sas_discover_sata(struct domain_device *dev)
591{
592 int res;
593
Dan Williamsb91bb292011-11-17 17:59:52 -0800594 if (dev->dev_type == SATA_PM)
595 return -ENODEV;
596
James Bottomleyb9142172007-07-22 13:15:55 -0500597 sas_get_ata_command_set(dev);
Dan Williamsb91bb292011-11-17 17:59:52 -0800598 sas_fill_in_rphy(dev, dev->rphy);
Dan Williams87c83312011-11-17 17:59:51 -0800599
600 res = sas_notify_lldd_dev_found(dev);
601 if (res)
602 return res;
603
604 sas_discover_event(dev->port, DISCE_PROBE);
Dan Williamsb91bb292011-11-17 17:59:52 -0800605 return 0;
James Bottomleyb9142172007-07-22 13:15:55 -0500606}
James Bottomley00dd4992011-01-23 09:44:12 -0600607
608void sas_ata_strategy_handler(struct Scsi_Host *shost)
609{
610 struct scsi_device *sdev;
Dan Williams87c83312011-11-17 17:59:51 -0800611 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
612
613 /* it's ok to defer revalidation events during ata eh, these
614 * disks are in one of three states:
615 * 1/ present for initial domain discovery, and these
616 * resets will cause bcn flutters
617 * 2/ hot removed, we'll discover that after eh fails
618 * 3/ hot added after initial discovery, lost the race, and need
619 * to catch the next train.
620 */
621 sas_disable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600622
623 shost_for_each_device(sdev, shost) {
624 struct domain_device *ddev = sdev_to_domain_dev(sdev);
625 struct ata_port *ap = ddev->sata_dev.ap;
626
627 if (!dev_is_sata(ddev))
628 continue;
James Bottomleyc2991902011-01-23 09:44:12 -0600629
James Bottomley00dd4992011-01-23 09:44:12 -0600630 ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler");
631 ata_scsi_port_error_handler(shost, ap);
632 }
Dan Williams87c83312011-11-17 17:59:51 -0800633
634 sas_enable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600635}
636
James Bottomley00dd4992011-01-23 09:44:12 -0600637int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
638 struct list_head *done_q)
639{
640 int rtn = 0;
641 struct scsi_cmnd *cmd, *n;
642 struct ata_port *ap;
643
644 do {
645 LIST_HEAD(sata_q);
646
647 ap = NULL;
James Bottomleyc2991902011-01-23 09:44:12 -0600648
James Bottomley00dd4992011-01-23 09:44:12 -0600649 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
650 struct domain_device *ddev = cmd_to_domain_dev(cmd);
651
652 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
653 continue;
James Bottomleyc2991902011-01-23 09:44:12 -0600654 if (ap && ap != ddev->sata_dev.ap)
James Bottomley00dd4992011-01-23 09:44:12 -0600655 continue;
656 ap = ddev->sata_dev.ap;
657 rtn = 1;
658 list_move(&cmd->eh_entry, &sata_q);
659 }
660
661 if (!list_empty(&sata_q)) {
James Bottomleyc2991902011-01-23 09:44:12 -0600662 ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n");
James Bottomley00dd4992011-01-23 09:44:12 -0600663 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
James Bottomleya82058a2011-03-10 17:13:18 -0600664 /*
665 * ata's error handler may leave the cmd on the list
666 * so make sure they don't remain on a stack list
667 * about to go out of scope.
668 *
669 * This looks strange, since the commands are
670 * now part of no list, but the next error
671 * action will be ata_port_error_handler()
672 * which takes no list and sweeps them up
673 * anyway from the ata tag array.
674 */
675 while (!list_empty(&sata_q))
676 list_del_init(sata_q.next);
James Bottomley00dd4992011-01-23 09:44:12 -0600677 }
678 } while (ap);
679
680 return rtn;
681}
Dan Williamsb52df412011-11-30 23:23:33 -0800682
683void sas_ata_schedule_reset(struct domain_device *dev)
684{
685 struct ata_eh_info *ehi;
686 struct ata_port *ap;
687 unsigned long flags;
688
689 if (!dev_is_sata(dev))
690 return;
691
692 ap = dev->sata_dev.ap;
693 ehi = &ap->link.eh_info;
694
695 spin_lock_irqsave(ap->lock, flags);
696 ehi->err_mask |= AC_ERR_TIMEOUT;
697 ehi->action |= ATA_EH_RESET;
698 ata_port_schedule_eh(ap);
699 spin_unlock_irqrestore(ap->lock, flags);
700}
Dan Williams81c757b2011-12-02 16:07:01 -0800701
702void sas_ata_wait_eh(struct domain_device *dev)
703{
704 struct ata_port *ap;
705
706 if (!dev_is_sata(dev))
707 return;
708
709 ap = dev->sata_dev.ap;
710 ata_port_wait_eh(ap);
711}