blob: 26a943eb153a71248101387b7447302241698385 [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>
Dan Williams50824d62011-12-04 01:06:24 -080026#include <linux/async.h>
Dan Williams43a5ab12011-12-08 23:20:44 -080027#include <linux/export.h>
James Bottomleyb9142172007-07-22 13:15:55 -050028
Darrick J. Wong338ec572006-10-18 14:43:37 -070029#include <scsi/sas_ata.h>
30#include "sas_internal.h"
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_device.h>
33#include <scsi/scsi_tcq.h>
34#include <scsi/scsi.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_sas.h>
37#include "../scsi_sas_internal.h"
Darrick J. Wong3a2755a2007-01-30 01:18:58 -080038#include "../scsi_transport_api.h"
39#include <scsi/scsi_eh.h>
Darrick J. Wong338ec572006-10-18 14:43:37 -070040
41static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
42{
43 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
44
45 /* transport error */
46 if (ts->resp == SAS_TASK_UNDELIVERED)
47 return AC_ERR_ATA_BUS;
48
49 /* ts->resp == SAS_TASK_COMPLETE */
50 /* task delivered, what happened afterwards? */
51 switch (ts->stat) {
52 case SAS_DEV_NO_RESPONSE:
53 return AC_ERR_TIMEOUT;
54
55 case SAS_INTERRUPTED:
56 case SAS_PHY_DOWN:
57 case SAS_NAK_R_ERR:
58 return AC_ERR_ATA_BUS;
59
60
61 case SAS_DATA_UNDERRUN:
62 /*
63 * Some programs that use the taskfile interface
64 * (smartctl in particular) can cause underrun
65 * problems. Ignore these errors, perhaps at our
66 * peril.
67 */
68 return 0;
69
70 case SAS_DATA_OVERRUN:
71 case SAS_QUEUE_FULL:
72 case SAS_DEVICE_UNKNOWN:
73 case SAS_SG_ERR:
74 return AC_ERR_INVALID;
75
Darrick J. Wong338ec572006-10-18 14:43:37 -070076 case SAS_OPEN_TO:
77 case SAS_OPEN_REJECT:
78 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -070079 __func__, ts->stat);
Darrick J. Wong338ec572006-10-18 14:43:37 -070080 return AC_ERR_OTHER;
81
James Bottomley75c0b382011-01-23 08:16:24 -060082 case SAM_STAT_CHECK_CONDITION:
Darrick J. Wong338ec572006-10-18 14:43:37 -070083 case SAS_ABORTED_TASK:
84 return AC_ERR_DEV;
85
86 case SAS_PROTO_RESPONSE:
87 /* This means the ending_fis has the error
88 * value; return 0 here to collect it */
89 return 0;
90 default:
91 return 0;
92 }
93}
94
95static void sas_ata_task_done(struct sas_task *task)
96{
97 struct ata_queued_cmd *qc = task->uldd_task;
Dan Williams9095a642011-11-28 11:29:20 -080098 struct domain_device *dev = task->dev;
Darrick J. Wong338ec572006-10-18 14:43:37 -070099 struct task_status_struct *stat = &task->task_status;
100 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
Dan Williams9095a642011-11-28 11:29:20 -0800101 struct sas_ha_struct *sas_ha = dev->port->ha;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700102 enum ata_completion_errors ac;
Darrick J. Wong3eb7a512007-01-30 01:18:35 -0800103 unsigned long flags;
Xiangliang Yubb650a12011-05-08 19:27:01 +0800104 struct ata_link *link;
Dan Williams3dff5722011-11-28 12:08:22 -0800105 struct ata_port *ap;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700106
Dan Williams9095a642011-11-28 11:29:20 -0800107 spin_lock_irqsave(&dev->done_lock, flags);
108 if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
109 task = NULL;
110 else if (qc && qc->scsicmd)
111 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
112 spin_unlock_irqrestore(&dev->done_lock, flags);
113
114 /* check if libsas-eh got to the task before us */
115 if (unlikely(!task))
116 return;
117
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800118 if (!qc)
119 goto qc_already_gone;
120
Dan Williams3dff5722011-11-28 12:08:22 -0800121 ap = qc->ap;
Dan Williams3dff5722011-11-28 12:08:22 -0800122 link = &ap->link;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800123
Dan Williams3dff5722011-11-28 12:08:22 -0800124 spin_lock_irqsave(ap->lock, flags);
125 /* check if we lost the race with libata/sas_ata_post_internal() */
126 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
127 spin_unlock_irqrestore(ap->lock, flags);
128 if (qc->scsicmd)
129 goto qc_already_gone;
130 else {
131 /* if eh is not involved and the port is frozen then the
132 * ata internal abort process has taken responsibility
133 * for this sas_task
134 */
135 return;
136 }
137 }
138
James Bottomley75c0b382011-01-23 08:16:24 -0600139 if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
140 ((stat->stat == SAM_STAT_CHECK_CONDITION &&
141 dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700142 ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
Xiangliang Yubb650a12011-05-08 19:27:01 +0800143
144 if (!link->sactive) {
145 qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
146 } else {
147 link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command);
148 if (unlikely(link->eh_info.err_mask))
149 qc->flags |= ATA_QCFLAG_FAILED;
150 }
James Bottomley75c0b382011-01-23 08:16:24 -0600151 } else {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700152 ac = sas_to_ata_err(stat);
153 if (ac) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700154 SAS_DPRINTK("%s: SAS error %x\n", __func__,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700155 stat->stat);
156 /* We saw a SAS error. Send a vague error. */
Xiangliang Yubb650a12011-05-08 19:27:01 +0800157 if (!link->sactive) {
158 qc->err_mask = ac;
159 } else {
160 link->eh_info.err_mask |= AC_ERR_DEV;
161 qc->flags |= ATA_QCFLAG_FAILED;
162 }
163
Darrick J. Wong338ec572006-10-18 14:43:37 -0700164 dev->sata_dev.tf.feature = 0x04; /* status err */
165 dev->sata_dev.tf.command = ATA_ERR;
166 }
167 }
168
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800169 qc->lldd_task = NULL;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700170 ata_qc_complete(qc);
Dan Williams3dff5722011-11-28 12:08:22 -0800171 spin_unlock_irqrestore(ap->lock, flags);
Darrick J. Wong3eb7a512007-01-30 01:18:35 -0800172
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800173qc_already_gone:
Darrick J. Wong338ec572006-10-18 14:43:37 -0700174 list_del_init(&task->list);
175 sas_free_task(task);
176}
177
178static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
179{
Dan Williams312d3e52011-11-17 17:59:50 -0800180 unsigned long flags;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700181 struct sas_task *task;
Dan Williams312d3e52011-11-17 17:59:50 -0800182 struct scatterlist *sg;
183 int ret = AC_ERR_SYSTEM;
184 unsigned int si, xfer = 0;
185 struct ata_port *ap = qc->ap;
186 struct domain_device *dev = ap->private_data;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700187 struct sas_ha_struct *sas_ha = dev->port->ha;
188 struct Scsi_Host *host = sas_ha->core.shost;
189 struct sas_internal *i = to_sas_internal(host->transportt);
Dan Williams312d3e52011-11-17 17:59:50 -0800190
191 /* TODO: audit callers to ensure they are ready for qc_issue to
192 * unconditionally re-enable interrupts
193 */
194 local_irq_save(flags);
195 spin_unlock(ap->lock);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700196
Darrick J. Wong56dd2c02010-10-01 13:55:47 -0700197 /* If the device fell off, no sense in issuing commands */
Dan Williamse1399422012-01-07 08:52:39 +0000198 if (test_bit(SAS_DEV_GONE, &dev->state))
Dan Williams312d3e52011-11-17 17:59:50 -0800199 goto out;
Darrick J. Wong56dd2c02010-10-01 13:55:47 -0700200
Darrick J. Wong338ec572006-10-18 14:43:37 -0700201 task = sas_alloc_task(GFP_ATOMIC);
202 if (!task)
Dan Williams312d3e52011-11-17 17:59:50 -0800203 goto out;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700204 task->dev = dev;
205 task->task_proto = SAS_PROTOCOL_STP;
206 task->task_done = sas_ata_task_done;
207
208 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
209 qc->tf.command == ATA_CMD_FPDMA_READ) {
210 /* Need to zero out the tag libata assigned us */
211 qc->tf.nsect = 0;
212 }
213
James Bottomley110dd8f2007-07-20 13:11:44 -0500214 ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700215 task->uldd_task = qc;
Tejun Heo405e66b2007-11-27 19:28:53 +0900216 if (ata_is_atapi(qc->tf.protocol)) {
Darrick J. Wong338ec572006-10-18 14:43:37 -0700217 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
James Bottomleydde20202008-02-19 11:36:56 +0100218 task->total_xfer_len = qc->nbytes;
219 task->num_scatter = qc->n_elem;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700220 } else {
Tejun Heoff2aeb12007-12-05 16:43:11 +0900221 for_each_sg(qc->sg, sg, qc->n_elem, si)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700222 xfer += sg->length;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700223
224 task->total_xfer_len = xfer;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900225 task->num_scatter = si;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700226 }
227
228 task->data_dir = qc->dma_dir;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900229 task->scatter = qc->sg;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700230 task->ata_task.retry_count = 1;
231 task->task_state_flags = SAS_TASK_STATE_PENDING;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800232 qc->lldd_task = task;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700233
234 switch (qc->tf.protocol) {
235 case ATA_PROT_NCQ:
236 task->ata_task.use_ncq = 1;
237 /* fall through */
Tejun Heo0dc36882007-12-18 16:34:43 -0500238 case ATAPI_PROT_DMA:
Darrick J. Wong338ec572006-10-18 14:43:37 -0700239 case ATA_PROT_DMA:
240 task->ata_task.dma_xfer = 1;
241 break;
242 }
243
Darrick J. Wongfe059f12007-01-30 01:18:55 -0800244 if (qc->scsicmd)
245 ASSIGN_SAS_TASK(qc->scsicmd, task);
246
Darrick J. Wong338ec572006-10-18 14:43:37 -0700247 if (sas_ha->lldd_max_execute_num < 2)
Dan Williams312d3e52011-11-17 17:59:50 -0800248 ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700249 else
Dan Williams312d3e52011-11-17 17:59:50 -0800250 ret = sas_queue_up(task);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700251
252 /* Examine */
Dan Williams312d3e52011-11-17 17:59:50 -0800253 if (ret) {
254 SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700255
Darrick J. Wongfe059f12007-01-30 01:18:55 -0800256 if (qc->scsicmd)
257 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700258 sas_free_task(task);
Dan Williams312d3e52011-11-17 17:59:50 -0800259 ret = AC_ERR_SYSTEM;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700260 }
261
Dan Williams312d3e52011-11-17 17:59:50 -0800262 out:
263 spin_lock(ap->lock);
264 local_irq_restore(flags);
265 return ret;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700266}
267
Tejun Heo4c9bf4e2008-04-07 22:47:20 +0900268static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
269{
270 struct domain_device *dev = qc->ap->private_data;
271
272 memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf));
273 return true;
274}
275
Dan Williams36a39942011-11-17 17:59:54 -0800276static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
277{
278 return to_sas_internal(dev->port->ha->core.shost->transportt);
279}
280
281static int smp_ata_check_ready(struct ata_link *link)
282{
283 int res;
284 u8 addr[8];
285 struct ata_port *ap = link->ap;
286 struct domain_device *dev = ap->private_data;
287 struct domain_device *ex_dev = dev->parent;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800288 struct sas_phy *phy = sas_get_local_phy(dev);
Dan Williams36a39942011-11-17 17:59:54 -0800289
290 res = sas_get_phy_attached_sas_addr(ex_dev, phy->number, addr);
Dan Williamsf41a0c42011-12-21 21:33:17 -0800291 sas_put_local_phy(phy);
Dan Williams36a39942011-11-17 17:59:54 -0800292 /* break the wait early if the expander is unreachable,
293 * otherwise keep polling
294 */
295 if (res == -ECOMM)
296 return res;
297 if (res != SMP_RESP_FUNC_ACC || SAS_ADDR(addr) == 0)
298 return 0;
299 else
300 return 1;
301}
302
303static int local_ata_check_ready(struct ata_link *link)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700304{
James Bottomley00dd4992011-01-23 09:44:12 -0600305 struct ata_port *ap = link->ap;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700306 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800307 struct sas_internal *i = dev_to_sas_internal(dev);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700308
Dan Williams36a39942011-11-17 17:59:54 -0800309 if (i->dft->lldd_ata_check_ready)
310 return i->dft->lldd_ata_check_ready(dev);
311 else {
312 /* lldd's that don't implement 'ready' checking get the
313 * old default behavior of not coordinating reset
314 * recovery with libata
315 */
316 return 1;
James Bottomley00dd4992011-01-23 09:44:12 -0600317 }
Dan Williams36a39942011-11-17 17:59:54 -0800318}
Darrick J. Wong338ec572006-10-18 14:43:37 -0700319
Dan Williams36a39942011-11-17 17:59:54 -0800320static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
321 unsigned long deadline)
322{
323 int ret = 0, res;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800324 struct sas_phy *phy;
Dan Williams36a39942011-11-17 17:59:54 -0800325 struct ata_port *ap = link->ap;
326 int (*check_ready)(struct ata_link *link);
327 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800328 struct sas_internal *i = dev_to_sas_internal(dev);
329
Dan Williamscb48d672011-12-22 14:58:24 -0800330 if (test_bit(SAS_DEV_GONE, &dev->state))
331 return -ENODEV;
332
Dan Williams36a39942011-11-17 17:59:54 -0800333 res = i->dft->lldd_I_T_nexus_reset(dev);
334
335 if (res != TMF_RESP_FUNC_COMPLETE)
336 SAS_DPRINTK("%s: Unable to reset ata device?\n", __func__);
337
Dan Williamsf41a0c42011-12-21 21:33:17 -0800338 phy = sas_get_local_phy(dev);
Dan Williams36a39942011-11-17 17:59:54 -0800339 if (scsi_is_sas_phy_local(phy))
340 check_ready = local_ata_check_ready;
341 else
342 check_ready = smp_ata_check_ready;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800343 sas_put_local_phy(phy);
Dan Williams36a39942011-11-17 17:59:54 -0800344
345 ret = ata_wait_after_reset(link, deadline, check_ready);
346 if (ret && ret != -EAGAIN)
347 ata_link_err(link, "COMRESET failed (errno=%d)\n", ret);
348
349 /* XXX: if the class changes during the reset the upper layer
350 * should be informed, if the device has gone away we assume
351 * libsas will eventually delete it
352 */
Darrick J. Wong338ec572006-10-18 14:43:37 -0700353 switch (dev->sata_dev.command_set) {
Dan Williams36a39942011-11-17 17:59:54 -0800354 case ATA_COMMAND_SET:
355 *class = ATA_DEV_ATA;
356 break;
357 case ATAPI_COMMAND_SET:
358 *class = ATA_DEV_ATAPI;
359 break;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700360 }
361
362 ap->cbl = ATA_CBL_SATA;
James Bottomley00dd4992011-01-23 09:44:12 -0600363 return ret;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700364}
365
Dave Jiang1ca1e432011-05-24 13:18:04 -0700366static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class,
367 unsigned long deadline)
368{
369 struct ata_port *ap = link->ap;
370 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800371 struct sas_internal *i = dev_to_sas_internal(dev);
Dave Jiang1ca1e432011-05-24 13:18:04 -0700372 int res = TMF_RESP_FUNC_FAILED;
373 int ret = 0;
374
375 if (i->dft->lldd_ata_soft_reset)
376 res = i->dft->lldd_ata_soft_reset(dev);
377
378 if (res != TMF_RESP_FUNC_COMPLETE) {
379 SAS_DPRINTK("%s: Unable to soft reset\n", __func__);
380 ret = -EAGAIN;
381 }
382
383 switch (dev->sata_dev.command_set) {
384 case ATA_COMMAND_SET:
385 SAS_DPRINTK("%s: Found ATA device.\n", __func__);
386 *class = ATA_DEV_ATA;
387 break;
388 case ATAPI_COMMAND_SET:
389 SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
390 *class = ATA_DEV_ATAPI;
391 break;
392 default:
393 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
394 __func__, dev->sata_dev.command_set);
395 *class = ATA_DEV_UNKNOWN;
396 break;
397 }
398
399 ap->cbl = ATA_CBL_SATA;
400 return ret;
401}
402
Dan Williams3dff5722011-11-28 12:08:22 -0800403/*
404 * notify the lldd to forget the sas_task for this internal ata command
405 * that bypasses scsi-eh
406 */
407static void sas_ata_internal_abort(struct sas_task *task)
408{
Dan Williams36a39942011-11-17 17:59:54 -0800409 struct sas_internal *si = dev_to_sas_internal(task->dev);
Dan Williams3dff5722011-11-28 12:08:22 -0800410 unsigned long flags;
411 int res;
412
413 spin_lock_irqsave(&task->task_state_lock, flags);
414 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
415 task->task_state_flags & SAS_TASK_STATE_DONE) {
416 spin_unlock_irqrestore(&task->task_state_lock, flags);
417 SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
418 task);
419 goto out;
420 }
421 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
422 spin_unlock_irqrestore(&task->task_state_lock, flags);
423
424 res = si->dft->lldd_abort_task(task);
425
426 spin_lock_irqsave(&task->task_state_lock, flags);
427 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
428 res == TMF_RESP_FUNC_COMPLETE) {
429 spin_unlock_irqrestore(&task->task_state_lock, flags);
430 goto out;
431 }
432
433 /* XXX we are not prepared to deal with ->lldd_abort_task()
434 * failures. TODO: lldds need to unconditionally forget about
435 * aborted ata tasks, otherwise we (likely) leak the sas task
436 * here
437 */
438 SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
439
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 return;
445 out:
446 list_del_init(&task->list);
447 sas_free_task(task);
448}
449
Darrick J. Wong338ec572006-10-18 14:43:37 -0700450static void sas_ata_post_internal(struct ata_queued_cmd *qc)
451{
452 if (qc->flags & ATA_QCFLAG_FAILED)
453 qc->err_mask |= AC_ERR_OTHER;
454
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800455 if (qc->err_mask) {
456 /*
Dan Williams3dff5722011-11-28 12:08:22 -0800457 * Find the sas_task and kill it. By this point, libata
458 * has decided to kill the qc and has frozen the port.
459 * In this state sas_ata_task_done() will no longer free
460 * the sas_task, so we need to notify the lldd (via
461 * ->lldd_abort_task) that the task is dead and free it
462 * ourselves.
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800463 */
464 struct sas_task *task = qc->lldd_task;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800465
466 qc->lldd_task = NULL;
Dan Williams3a2cdf32011-11-29 14:54:28 -0800467 if (!task)
468 return;
469 task->uldd_task = NULL;
470 sas_ata_internal_abort(task);
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800471 }
Darrick J. Wong338ec572006-10-18 14:43:37 -0700472}
473
Dan Williamsb91bb292011-11-17 17:59:52 -0800474
475static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
476{
477 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800478 struct sas_internal *i = dev_to_sas_internal(dev);
Dan Williamsb91bb292011-11-17 17:59:52 -0800479
480 if (i->dft->lldd_ata_set_dmamode)
481 i->dft->lldd_ata_set_dmamode(dev);
482}
483
Darrick J. Wong338ec572006-10-18 14:43:37 -0700484static struct ata_port_operations sas_sata_ops = {
James Bottomley00dd4992011-01-23 09:44:12 -0600485 .prereset = ata_std_prereset,
Dave Jiang1ca1e432011-05-24 13:18:04 -0700486 .softreset = sas_ata_soft_reset,
James Bottomley00dd4992011-01-23 09:44:12 -0600487 .hardreset = sas_ata_hard_reset,
488 .postreset = ata_std_postreset,
489 .error_handler = ata_std_error_handler,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700490 .post_internal_cmd = sas_ata_post_internal,
David Milburnf0ad30d2010-09-03 17:13:03 -0500491 .qc_defer = ata_std_qc_defer,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700492 .qc_prep = ata_noop_qc_prep,
493 .qc_issue = sas_ata_qc_issue,
Tejun Heo4c9bf4e2008-04-07 22:47:20 +0900494 .qc_fill_rtf = sas_ata_qc_fill_rtf,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700495 .port_start = ata_sas_port_start,
496 .port_stop = ata_sas_port_stop,
Dan Williamsb91bb292011-11-17 17:59:52 -0800497 .set_dmamode = sas_ata_set_dmamode,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700498};
499
500static struct ata_port_info sata_port_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300501 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
Sergei Shtylyov0f2e0332011-01-21 20:32:01 +0300502 .pio_mask = ATA_PIO4,
503 .mwdma_mask = ATA_MWDMA2,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700504 .udma_mask = ATA_UDMA6,
505 .port_ops = &sas_sata_ops
506};
507
508int sas_ata_init_host_and_port(struct domain_device *found_dev,
509 struct scsi_target *starget)
510{
511 struct Scsi_Host *shost = dev_to_shost(&starget->dev);
512 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
513 struct ata_port *ap;
514
515 ata_host_init(&found_dev->sata_dev.ata_host,
Jeff Garzik1d1bbee2007-07-26 09:28:37 -0400516 ha->dev,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700517 sata_port_info.flags,
518 &sas_sata_ops);
519 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
520 &sata_port_info,
521 shost);
522 if (!ap) {
523 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
524 return -ENODEV;
525 }
526
527 ap->private_data = found_dev;
528 ap->cbl = ATA_CBL_SATA;
529 ap->scsi_host = shost;
530 found_dev->sata_dev.ap = ap;
531
532 return 0;
533}
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800534
535void sas_ata_task_abort(struct sas_task *task)
536{
537 struct ata_queued_cmd *qc = task->uldd_task;
538 struct completion *waiting;
539
540 /* Bounce SCSI-initiated commands to the SCSI EH */
541 if (qc->scsicmd) {
James Bottomley1b4d0d82010-05-13 09:31:54 -0500542 struct request_queue *q = qc->scsicmd->device->request_queue;
543 unsigned long flags;
544
Tejun Heo70b25f82010-04-15 09:00:08 +0900545 spin_lock_irqsave(q->queue_lock, flags);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700546 blk_abort_request(qc->scsicmd->request);
Tejun Heo70b25f82010-04-15 09:00:08 +0900547 spin_unlock_irqrestore(q->queue_lock, flags);
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800548 scsi_schedule_eh(qc->scsicmd->device->host);
549 return;
550 }
551
552 /* Internal command, fake a timeout and complete. */
553 qc->flags &= ~ATA_QCFLAG_ACTIVE;
554 qc->flags |= ATA_QCFLAG_FAILED;
555 qc->err_mask |= AC_ERR_TIMEOUT;
556 waiting = qc->private_data;
557 complete(waiting);
558}
James Bottomleyb9142172007-07-22 13:15:55 -0500559
James Bottomleyb9142172007-07-22 13:15:55 -0500560static void sas_get_ata_command_set(struct domain_device *dev)
561{
562 struct dev_to_host_fis *fis =
563 (struct dev_to_host_fis *) dev->frame_rcvd;
564
565 if ((fis->sector_count == 1 && /* ATA */
566 fis->lbal == 1 &&
567 fis->lbam == 0 &&
568 fis->lbah == 0 &&
569 fis->device == 0)
570 ||
571 (fis->sector_count == 0 && /* CE-ATA (mATA) */
572 fis->lbal == 0 &&
573 fis->lbam == 0xCE &&
574 fis->lbah == 0xAA &&
575 (fis->device & ~0x10) == 0))
576
577 dev->sata_dev.command_set = ATA_COMMAND_SET;
578
579 else if ((fis->interrupt_reason == 1 && /* ATAPI */
580 fis->lbal == 1 &&
581 fis->byte_count_low == 0x14 &&
582 fis->byte_count_high == 0xEB &&
583 (fis->device & ~0x10) == 0))
584
585 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
586
587 else if ((fis->sector_count == 1 && /* SEMB */
588 fis->lbal == 1 &&
589 fis->lbam == 0x3C &&
590 fis->lbah == 0xC3 &&
591 fis->device == 0)
592 ||
593 (fis->interrupt_reason == 1 && /* SATA PM */
594 fis->lbal == 1 &&
595 fis->byte_count_low == 0x69 &&
596 fis->byte_count_high == 0x96 &&
597 (fis->device & ~0x10) == 0))
598
599 /* Treat it as a superset? */
600 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
601}
602
Dan Williams87c83312011-11-17 17:59:51 -0800603void sas_probe_sata(struct work_struct *work)
604{
605 struct domain_device *dev, *n;
606 struct sas_discovery_event *ev =
607 container_of(work, struct sas_discovery_event, work);
608 struct asd_sas_port *port = ev->port;
609
610 clear_bit(DISCE_PROBE, &port->disc.pending);
611
612 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
613 int err;
614
615 spin_lock_irq(&port->dev_list_lock);
616 list_add_tail(&dev->dev_list_node, &port->dev_list);
617 spin_unlock_irq(&port->dev_list_lock);
618
619 err = sas_rphy_add(dev->rphy);
620
621 if (err) {
622 SAS_DPRINTK("%s: for %s device %16llx returned %d\n",
623 __func__, dev->parent ? "exp-attached" :
624 "direct-attached",
625 SAS_ADDR(dev->sas_addr), err);
626 sas_unregister_dev(port, dev);
627 } else
628 list_del_init(&dev->disco_list_node);
629 }
630}
631
James Bottomleyb9142172007-07-22 13:15:55 -0500632/**
633 * sas_discover_sata -- discover an STP/SATA domain device
634 * @dev: pointer to struct domain_device of interest
635 *
Dan Williamsb91bb292011-11-17 17:59:52 -0800636 * Devices directly attached to a HA port, have no parents. All other
637 * devices do, and should have their "parent" pointer set appropriately
638 * before calling this function.
James Bottomleyb9142172007-07-22 13:15:55 -0500639 */
640int sas_discover_sata(struct domain_device *dev)
641{
642 int res;
643
Dan Williamsb91bb292011-11-17 17:59:52 -0800644 if (dev->dev_type == SATA_PM)
645 return -ENODEV;
646
James Bottomleyb9142172007-07-22 13:15:55 -0500647 sas_get_ata_command_set(dev);
Dan Williamsb91bb292011-11-17 17:59:52 -0800648 sas_fill_in_rphy(dev, dev->rphy);
Dan Williams87c83312011-11-17 17:59:51 -0800649
650 res = sas_notify_lldd_dev_found(dev);
651 if (res)
652 return res;
653
654 sas_discover_event(dev->port, DISCE_PROBE);
Dan Williamsb91bb292011-11-17 17:59:52 -0800655 return 0;
James Bottomleyb9142172007-07-22 13:15:55 -0500656}
James Bottomley00dd4992011-01-23 09:44:12 -0600657
Dan Williams50824d62011-12-04 01:06:24 -0800658static void async_sas_ata_eh(void *data, async_cookie_t cookie)
659{
660 struct domain_device *dev = data;
661 struct ata_port *ap = dev->sata_dev.ap;
662 struct sas_ha_struct *ha = dev->port->ha;
663
Dan Williams8abda4d2012-01-10 15:14:09 -0800664 /* hold a reference over eh since we may be racing with final
665 * remove once all commands are completed
666 */
667 kref_get(&dev->kref);
Dan Williams50824d62011-12-04 01:06:24 -0800668 ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler");
669 ata_scsi_port_error_handler(ha->core.shost, ap);
Dan Williams8abda4d2012-01-10 15:14:09 -0800670 sas_put_device(dev);
Dan Williams50824d62011-12-04 01:06:24 -0800671}
672
James Bottomley00dd4992011-01-23 09:44:12 -0600673void sas_ata_strategy_handler(struct Scsi_Host *shost)
674{
675 struct scsi_device *sdev;
Dan Williams87c83312011-11-17 17:59:51 -0800676 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
Dan Williams50824d62011-12-04 01:06:24 -0800677 LIST_HEAD(async);
Dan Williams87c83312011-11-17 17:59:51 -0800678
679 /* it's ok to defer revalidation events during ata eh, these
680 * disks are in one of three states:
681 * 1/ present for initial domain discovery, and these
682 * resets will cause bcn flutters
683 * 2/ hot removed, we'll discover that after eh fails
684 * 3/ hot added after initial discovery, lost the race, and need
685 * to catch the next train.
686 */
687 sas_disable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600688
689 shost_for_each_device(sdev, shost) {
690 struct domain_device *ddev = sdev_to_domain_dev(sdev);
James Bottomley00dd4992011-01-23 09:44:12 -0600691
692 if (!dev_is_sata(ddev))
693 continue;
James Bottomleyc2991902011-01-23 09:44:12 -0600694
Dan Williams50824d62011-12-04 01:06:24 -0800695 async_schedule_domain(async_sas_ata_eh, ddev, &async);
James Bottomley00dd4992011-01-23 09:44:12 -0600696 }
Dan Williams50824d62011-12-04 01:06:24 -0800697 async_synchronize_full_domain(&async);
Dan Williams87c83312011-11-17 17:59:51 -0800698
699 sas_enable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600700}
701
James Bottomley00dd4992011-01-23 09:44:12 -0600702int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
703 struct list_head *done_q)
704{
705 int rtn = 0;
706 struct scsi_cmnd *cmd, *n;
707 struct ata_port *ap;
708
709 do {
710 LIST_HEAD(sata_q);
711
712 ap = NULL;
James Bottomleyc2991902011-01-23 09:44:12 -0600713
James Bottomley00dd4992011-01-23 09:44:12 -0600714 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
715 struct domain_device *ddev = cmd_to_domain_dev(cmd);
716
717 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
718 continue;
James Bottomleyc2991902011-01-23 09:44:12 -0600719 if (ap && ap != ddev->sata_dev.ap)
James Bottomley00dd4992011-01-23 09:44:12 -0600720 continue;
721 ap = ddev->sata_dev.ap;
722 rtn = 1;
723 list_move(&cmd->eh_entry, &sata_q);
724 }
725
726 if (!list_empty(&sata_q)) {
James Bottomleyc2991902011-01-23 09:44:12 -0600727 ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n");
James Bottomley00dd4992011-01-23 09:44:12 -0600728 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
James Bottomleya82058a2011-03-10 17:13:18 -0600729 /*
730 * ata's error handler may leave the cmd on the list
731 * so make sure they don't remain on a stack list
732 * about to go out of scope.
733 *
734 * This looks strange, since the commands are
735 * now part of no list, but the next error
736 * action will be ata_port_error_handler()
737 * which takes no list and sweeps them up
738 * anyway from the ata tag array.
739 */
740 while (!list_empty(&sata_q))
741 list_del_init(sata_q.next);
James Bottomley00dd4992011-01-23 09:44:12 -0600742 }
743 } while (ap);
744
745 return rtn;
746}
Dan Williamsb52df412011-11-30 23:23:33 -0800747
748void sas_ata_schedule_reset(struct domain_device *dev)
749{
750 struct ata_eh_info *ehi;
751 struct ata_port *ap;
752 unsigned long flags;
753
754 if (!dev_is_sata(dev))
755 return;
756
757 ap = dev->sata_dev.ap;
758 ehi = &ap->link.eh_info;
759
760 spin_lock_irqsave(ap->lock, flags);
761 ehi->err_mask |= AC_ERR_TIMEOUT;
762 ehi->action |= ATA_EH_RESET;
763 ata_port_schedule_eh(ap);
764 spin_unlock_irqrestore(ap->lock, flags);
765}
Dan Williams43a5ab12011-12-08 23:20:44 -0800766EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
Dan Williams81c757b2011-12-02 16:07:01 -0800767
768void sas_ata_wait_eh(struct domain_device *dev)
769{
770 struct ata_port *ap;
771
772 if (!dev_is_sata(dev))
773 return;
774
775 ap = dev->sata_dev.ap;
776 ata_port_wait_eh(ap);
777}