blob: eb8b77c86169cb128e4104865698d432c4eb9d90 [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
Dan Williams354cf822012-01-12 17:57:35 -0800281static void sas_get_ata_command_set(struct domain_device *dev);
282
283int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
284{
285 if (phy->attached_tproto & SAS_PROTOCOL_STP)
286 dev->tproto = phy->attached_tproto;
287 if (phy->attached_sata_dev)
288 dev->tproto |= SATA_DEV;
289
290 if (phy->attached_dev_type == SATA_PENDING)
291 dev->dev_type = SATA_PENDING;
292 else {
293 int res;
294
295 dev->dev_type = SATA_DEV;
296 res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
297 &dev->sata_dev.rps_resp);
298 if (res) {
299 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
300 "0x%x\n", SAS_ADDR(dev->parent->sas_addr),
301 phy->phy_id, res);
302 return res;
303 }
304 memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
305 sizeof(struct dev_to_host_fis));
306 /* TODO switch to ata_dev_classify() */
307 sas_get_ata_command_set(dev);
308 }
309 return 0;
310}
311
312static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
313{
314 int res;
315
316 /* we weren't pending, so successfully end the reset sequence now */
317 if (dev->dev_type != SATA_PENDING)
318 return 1;
319
320 /* hmmm, if this succeeds do we need to repost the domain_device to the
321 * lldd so it can pick up new parameters?
322 */
323 res = sas_get_ata_info(dev, phy);
324 if (res)
325 return 0; /* retry */
326 else
327 return 1;
328}
329
Dan Williams36a39942011-11-17 17:59:54 -0800330static int smp_ata_check_ready(struct ata_link *link)
331{
332 int res;
Dan Williams36a39942011-11-17 17:59:54 -0800333 struct ata_port *ap = link->ap;
334 struct domain_device *dev = ap->private_data;
335 struct domain_device *ex_dev = dev->parent;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800336 struct sas_phy *phy = sas_get_local_phy(dev);
Dan Williams354cf822012-01-12 17:57:35 -0800337 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number];
Dan Williams36a39942011-11-17 17:59:54 -0800338
Dan Williams354cf822012-01-12 17:57:35 -0800339 res = sas_ex_phy_discover(ex_dev, phy->number);
Dan Williamsf41a0c42011-12-21 21:33:17 -0800340 sas_put_local_phy(phy);
Dan Williams354cf822012-01-12 17:57:35 -0800341
Dan Williams36a39942011-11-17 17:59:54 -0800342 /* break the wait early if the expander is unreachable,
343 * otherwise keep polling
344 */
345 if (res == -ECOMM)
346 return res;
Dan Williams354cf822012-01-12 17:57:35 -0800347 if (res != SMP_RESP_FUNC_ACC)
Dan Williams36a39942011-11-17 17:59:54 -0800348 return 0;
Dan Williams354cf822012-01-12 17:57:35 -0800349
350 switch (ex_phy->attached_dev_type) {
351 case SATA_PENDING:
352 return 0;
353 case SAS_END_DEV:
354 if (ex_phy->attached_sata_dev)
355 return sas_ata_clear_pending(dev, ex_phy);
356 default:
357 return -ENODEV;
358 }
Dan Williams36a39942011-11-17 17:59:54 -0800359}
360
361static int local_ata_check_ready(struct ata_link *link)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700362{
James Bottomley00dd4992011-01-23 09:44:12 -0600363 struct ata_port *ap = link->ap;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700364 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800365 struct sas_internal *i = dev_to_sas_internal(dev);
Darrick J. Wong338ec572006-10-18 14:43:37 -0700366
Dan Williams36a39942011-11-17 17:59:54 -0800367 if (i->dft->lldd_ata_check_ready)
368 return i->dft->lldd_ata_check_ready(dev);
369 else {
370 /* lldd's that don't implement 'ready' checking get the
371 * old default behavior of not coordinating reset
372 * recovery with libata
373 */
374 return 1;
James Bottomley00dd4992011-01-23 09:44:12 -0600375 }
Dan Williams36a39942011-11-17 17:59:54 -0800376}
Darrick J. Wong338ec572006-10-18 14:43:37 -0700377
Dan Williamsd214d812012-01-16 11:56:50 -0800378static int sas_ata_printk(const char *level, const struct domain_device *ddev,
379 const char *fmt, ...)
380{
381 struct ata_port *ap = ddev->sata_dev.ap;
382 struct device *dev = &ddev->rphy->dev;
383 struct va_format vaf;
384 va_list args;
385 int r;
386
387 va_start(args, fmt);
388
389 vaf.fmt = fmt;
390 vaf.va = &args;
391
392 r = printk("%ssas: ata%u: %s: %pV",
393 level, ap->print_id, dev_name(dev), &vaf);
394
395 va_end(args);
396
397 return r;
398}
399
Dan Williams36a39942011-11-17 17:59:54 -0800400static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
401 unsigned long deadline)
402{
403 int ret = 0, res;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800404 struct sas_phy *phy;
Dan Williams36a39942011-11-17 17:59:54 -0800405 struct ata_port *ap = link->ap;
406 int (*check_ready)(struct ata_link *link);
407 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800408 struct sas_internal *i = dev_to_sas_internal(dev);
409
Dan Williamscb48d672011-12-22 14:58:24 -0800410 if (test_bit(SAS_DEV_GONE, &dev->state))
411 return -ENODEV;
412
Dan Williams36a39942011-11-17 17:59:54 -0800413 res = i->dft->lldd_I_T_nexus_reset(dev);
414
415 if (res != TMF_RESP_FUNC_COMPLETE)
Dan Williamsd214d812012-01-16 11:56:50 -0800416 sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
Dan Williams36a39942011-11-17 17:59:54 -0800417
Dan Williamsf41a0c42011-12-21 21:33:17 -0800418 phy = sas_get_local_phy(dev);
Dan Williams36a39942011-11-17 17:59:54 -0800419 if (scsi_is_sas_phy_local(phy))
420 check_ready = local_ata_check_ready;
421 else
422 check_ready = smp_ata_check_ready;
Dan Williamsf41a0c42011-12-21 21:33:17 -0800423 sas_put_local_phy(phy);
Dan Williams36a39942011-11-17 17:59:54 -0800424
425 ret = ata_wait_after_reset(link, deadline, check_ready);
426 if (ret && ret != -EAGAIN)
Dan Williamsd214d812012-01-16 11:56:50 -0800427 sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
Dan Williams36a39942011-11-17 17:59:54 -0800428
429 /* XXX: if the class changes during the reset the upper layer
430 * should be informed, if the device has gone away we assume
431 * libsas will eventually delete it
432 */
Darrick J. Wong338ec572006-10-18 14:43:37 -0700433 switch (dev->sata_dev.command_set) {
Dan Williams36a39942011-11-17 17:59:54 -0800434 case ATA_COMMAND_SET:
435 *class = ATA_DEV_ATA;
436 break;
437 case ATAPI_COMMAND_SET:
438 *class = ATA_DEV_ATAPI;
439 break;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700440 }
441
442 ap->cbl = ATA_CBL_SATA;
James Bottomley00dd4992011-01-23 09:44:12 -0600443 return ret;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700444}
445
Dave Jiang1ca1e432011-05-24 13:18:04 -0700446static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class,
447 unsigned long deadline)
448{
449 struct ata_port *ap = link->ap;
450 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800451 struct sas_internal *i = dev_to_sas_internal(dev);
Dave Jiang1ca1e432011-05-24 13:18:04 -0700452 int res = TMF_RESP_FUNC_FAILED;
453 int ret = 0;
454
455 if (i->dft->lldd_ata_soft_reset)
456 res = i->dft->lldd_ata_soft_reset(dev);
457
458 if (res != TMF_RESP_FUNC_COMPLETE) {
459 SAS_DPRINTK("%s: Unable to soft reset\n", __func__);
460 ret = -EAGAIN;
461 }
462
463 switch (dev->sata_dev.command_set) {
464 case ATA_COMMAND_SET:
465 SAS_DPRINTK("%s: Found ATA device.\n", __func__);
466 *class = ATA_DEV_ATA;
467 break;
468 case ATAPI_COMMAND_SET:
469 SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
470 *class = ATA_DEV_ATAPI;
471 break;
472 default:
473 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
474 __func__, dev->sata_dev.command_set);
475 *class = ATA_DEV_UNKNOWN;
476 break;
477 }
478
479 ap->cbl = ATA_CBL_SATA;
480 return ret;
481}
482
Dan Williams3dff5722011-11-28 12:08:22 -0800483/*
484 * notify the lldd to forget the sas_task for this internal ata command
485 * that bypasses scsi-eh
486 */
487static void sas_ata_internal_abort(struct sas_task *task)
488{
Dan Williams36a39942011-11-17 17:59:54 -0800489 struct sas_internal *si = dev_to_sas_internal(task->dev);
Dan Williams3dff5722011-11-28 12:08:22 -0800490 unsigned long flags;
491 int res;
492
493 spin_lock_irqsave(&task->task_state_lock, flags);
494 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
495 task->task_state_flags & SAS_TASK_STATE_DONE) {
496 spin_unlock_irqrestore(&task->task_state_lock, flags);
497 SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
498 task);
499 goto out;
500 }
501 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
502 spin_unlock_irqrestore(&task->task_state_lock, flags);
503
504 res = si->dft->lldd_abort_task(task);
505
506 spin_lock_irqsave(&task->task_state_lock, flags);
507 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
508 res == TMF_RESP_FUNC_COMPLETE) {
509 spin_unlock_irqrestore(&task->task_state_lock, flags);
510 goto out;
511 }
512
513 /* XXX we are not prepared to deal with ->lldd_abort_task()
514 * failures. TODO: lldds need to unconditionally forget about
515 * aborted ata tasks, otherwise we (likely) leak the sas task
516 * here
517 */
518 SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
519
520 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
521 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
522 spin_unlock_irqrestore(&task->task_state_lock, flags);
523
524 return;
525 out:
526 list_del_init(&task->list);
527 sas_free_task(task);
528}
529
Darrick J. Wong338ec572006-10-18 14:43:37 -0700530static void sas_ata_post_internal(struct ata_queued_cmd *qc)
531{
532 if (qc->flags & ATA_QCFLAG_FAILED)
533 qc->err_mask |= AC_ERR_OTHER;
534
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800535 if (qc->err_mask) {
536 /*
Dan Williams3dff5722011-11-28 12:08:22 -0800537 * Find the sas_task and kill it. By this point, libata
538 * has decided to kill the qc and has frozen the port.
539 * In this state sas_ata_task_done() will no longer free
540 * the sas_task, so we need to notify the lldd (via
541 * ->lldd_abort_task) that the task is dead and free it
542 * ourselves.
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800543 */
544 struct sas_task *task = qc->lldd_task;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800545
546 qc->lldd_task = NULL;
Dan Williams3a2cdf32011-11-29 14:54:28 -0800547 if (!task)
548 return;
549 task->uldd_task = NULL;
550 sas_ata_internal_abort(task);
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800551 }
Darrick J. Wong338ec572006-10-18 14:43:37 -0700552}
553
Dan Williamsb91bb292011-11-17 17:59:52 -0800554
555static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
556{
557 struct domain_device *dev = ap->private_data;
Dan Williams36a39942011-11-17 17:59:54 -0800558 struct sas_internal *i = dev_to_sas_internal(dev);
Dan Williamsb91bb292011-11-17 17:59:52 -0800559
560 if (i->dft->lldd_ata_set_dmamode)
561 i->dft->lldd_ata_set_dmamode(dev);
562}
563
Darrick J. Wong338ec572006-10-18 14:43:37 -0700564static struct ata_port_operations sas_sata_ops = {
James Bottomley00dd4992011-01-23 09:44:12 -0600565 .prereset = ata_std_prereset,
Dave Jiang1ca1e432011-05-24 13:18:04 -0700566 .softreset = sas_ata_soft_reset,
James Bottomley00dd4992011-01-23 09:44:12 -0600567 .hardreset = sas_ata_hard_reset,
568 .postreset = ata_std_postreset,
569 .error_handler = ata_std_error_handler,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700570 .post_internal_cmd = sas_ata_post_internal,
David Milburnf0ad30d2010-09-03 17:13:03 -0500571 .qc_defer = ata_std_qc_defer,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700572 .qc_prep = ata_noop_qc_prep,
573 .qc_issue = sas_ata_qc_issue,
Tejun Heo4c9bf4e2008-04-07 22:47:20 +0900574 .qc_fill_rtf = sas_ata_qc_fill_rtf,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700575 .port_start = ata_sas_port_start,
576 .port_stop = ata_sas_port_stop,
Dan Williamsb91bb292011-11-17 17:59:52 -0800577 .set_dmamode = sas_ata_set_dmamode,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700578};
579
580static struct ata_port_info sata_port_info = {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300581 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
Sergei Shtylyov0f2e0332011-01-21 20:32:01 +0300582 .pio_mask = ATA_PIO4,
583 .mwdma_mask = ATA_MWDMA2,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700584 .udma_mask = ATA_UDMA6,
585 .port_ops = &sas_sata_ops
586};
587
Dan Williams9508a662012-01-18 20:47:01 -0800588int sas_ata_init_host_and_port(struct domain_device *found_dev)
Darrick J. Wong338ec572006-10-18 14:43:37 -0700589{
Dan Williams9508a662012-01-18 20:47:01 -0800590 struct sas_ha_struct *ha = found_dev->port->ha;
591 struct Scsi_Host *shost = ha->core.shost;
Darrick J. Wong338ec572006-10-18 14:43:37 -0700592 struct ata_port *ap;
593
594 ata_host_init(&found_dev->sata_dev.ata_host,
Jeff Garzik1d1bbee2007-07-26 09:28:37 -0400595 ha->dev,
Darrick J. Wong338ec572006-10-18 14:43:37 -0700596 sata_port_info.flags,
597 &sas_sata_ops);
598 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
599 &sata_port_info,
600 shost);
601 if (!ap) {
602 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
603 return -ENODEV;
604 }
605
606 ap->private_data = found_dev;
607 ap->cbl = ATA_CBL_SATA;
608 ap->scsi_host = shost;
Dan Williams9508a662012-01-18 20:47:01 -0800609 /* publish initialized ata port */
610 smp_wmb();
Darrick J. Wong338ec572006-10-18 14:43:37 -0700611 found_dev->sata_dev.ap = ap;
612
613 return 0;
614}
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800615
616void sas_ata_task_abort(struct sas_task *task)
617{
618 struct ata_queued_cmd *qc = task->uldd_task;
619 struct completion *waiting;
620
621 /* Bounce SCSI-initiated commands to the SCSI EH */
622 if (qc->scsicmd) {
James Bottomley1b4d0d82010-05-13 09:31:54 -0500623 struct request_queue *q = qc->scsicmd->device->request_queue;
624 unsigned long flags;
625
Tejun Heo70b25f82010-04-15 09:00:08 +0900626 spin_lock_irqsave(q->queue_lock, flags);
Jens Axboe242f9dc2008-09-14 05:55:09 -0700627 blk_abort_request(qc->scsicmd->request);
Tejun Heo70b25f82010-04-15 09:00:08 +0900628 spin_unlock_irqrestore(q->queue_lock, flags);
Darrick J. Wong3a2755a2007-01-30 01:18:58 -0800629 scsi_schedule_eh(qc->scsicmd->device->host);
630 return;
631 }
632
633 /* Internal command, fake a timeout and complete. */
634 qc->flags &= ~ATA_QCFLAG_ACTIVE;
635 qc->flags |= ATA_QCFLAG_FAILED;
636 qc->err_mask |= AC_ERR_TIMEOUT;
637 waiting = qc->private_data;
638 complete(waiting);
639}
James Bottomleyb9142172007-07-22 13:15:55 -0500640
James Bottomleyb9142172007-07-22 13:15:55 -0500641static void sas_get_ata_command_set(struct domain_device *dev)
642{
643 struct dev_to_host_fis *fis =
644 (struct dev_to_host_fis *) dev->frame_rcvd;
645
Dan Williams354cf822012-01-12 17:57:35 -0800646 if (dev->dev_type == SATA_PENDING)
647 return;
648
James Bottomleyb9142172007-07-22 13:15:55 -0500649 if ((fis->sector_count == 1 && /* ATA */
650 fis->lbal == 1 &&
651 fis->lbam == 0 &&
652 fis->lbah == 0 &&
653 fis->device == 0)
654 ||
655 (fis->sector_count == 0 && /* CE-ATA (mATA) */
656 fis->lbal == 0 &&
657 fis->lbam == 0xCE &&
658 fis->lbah == 0xAA &&
659 (fis->device & ~0x10) == 0))
660
661 dev->sata_dev.command_set = ATA_COMMAND_SET;
662
663 else if ((fis->interrupt_reason == 1 && /* ATAPI */
664 fis->lbal == 1 &&
665 fis->byte_count_low == 0x14 &&
666 fis->byte_count_high == 0xEB &&
667 (fis->device & ~0x10) == 0))
668
669 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
670
671 else if ((fis->sector_count == 1 && /* SEMB */
672 fis->lbal == 1 &&
673 fis->lbam == 0x3C &&
674 fis->lbah == 0xC3 &&
675 fis->device == 0)
676 ||
677 (fis->interrupt_reason == 1 && /* SATA PM */
678 fis->lbal == 1 &&
679 fis->byte_count_low == 0x69 &&
680 fis->byte_count_high == 0x96 &&
681 (fis->device & ~0x10) == 0))
682
683 /* Treat it as a superset? */
684 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
685}
686
Dan Williams9508a662012-01-18 20:47:01 -0800687void sas_probe_sata(struct asd_sas_port *port)
688{
689 struct domain_device *dev, *n;
690 int err;
691
692 mutex_lock(&port->ha->disco_mutex);
693 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
694 if (!dev_is_sata(dev))
695 continue;
696
697 err = sas_ata_init_host_and_port(dev);
698 if (err)
699 sas_fail_probe(dev, __func__, err);
700 else
701 ata_sas_async_port_init(dev->sata_dev.ap);
702 }
703 mutex_unlock(&port->ha->disco_mutex);
704
705 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
706 if (!dev_is_sata(dev))
707 continue;
708
709 sas_ata_wait_eh(dev);
710
711 /* if libata could not bring the link up, don't surface
712 * the device
713 */
714 if (ata_dev_disabled(sas_to_ata_dev(dev)))
715 sas_fail_probe(dev, __func__, -ENODEV);
716 }
717}
718
James Bottomleyb9142172007-07-22 13:15:55 -0500719/**
720 * sas_discover_sata -- discover an STP/SATA domain device
721 * @dev: pointer to struct domain_device of interest
722 *
Dan Williamsb91bb292011-11-17 17:59:52 -0800723 * Devices directly attached to a HA port, have no parents. All other
724 * devices do, and should have their "parent" pointer set appropriately
725 * before calling this function.
James Bottomleyb9142172007-07-22 13:15:55 -0500726 */
727int sas_discover_sata(struct domain_device *dev)
728{
729 int res;
730
Dan Williamsb91bb292011-11-17 17:59:52 -0800731 if (dev->dev_type == SATA_PM)
732 return -ENODEV;
733
James Bottomleyb9142172007-07-22 13:15:55 -0500734 sas_get_ata_command_set(dev);
Dan Williamsb91bb292011-11-17 17:59:52 -0800735 sas_fill_in_rphy(dev, dev->rphy);
Dan Williams87c83312011-11-17 17:59:51 -0800736
737 res = sas_notify_lldd_dev_found(dev);
738 if (res)
739 return res;
740
741 sas_discover_event(dev->port, DISCE_PROBE);
Dan Williamsb91bb292011-11-17 17:59:52 -0800742 return 0;
James Bottomleyb9142172007-07-22 13:15:55 -0500743}
James Bottomley00dd4992011-01-23 09:44:12 -0600744
Dan Williams50824d62011-12-04 01:06:24 -0800745static void async_sas_ata_eh(void *data, async_cookie_t cookie)
746{
747 struct domain_device *dev = data;
748 struct ata_port *ap = dev->sata_dev.ap;
749 struct sas_ha_struct *ha = dev->port->ha;
750
Dan Williams8abda4d2012-01-10 15:14:09 -0800751 /* hold a reference over eh since we may be racing with final
752 * remove once all commands are completed
753 */
754 kref_get(&dev->kref);
Dan Williamsd214d812012-01-16 11:56:50 -0800755 sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
Dan Williams50824d62011-12-04 01:06:24 -0800756 ata_scsi_port_error_handler(ha->core.shost, ap);
Dan Williams8abda4d2012-01-10 15:14:09 -0800757 sas_put_device(dev);
Dan Williams50824d62011-12-04 01:06:24 -0800758}
759
Dan Williams9508a662012-01-18 20:47:01 -0800760static bool sas_ata_dev_eh_valid(struct domain_device *dev)
761{
762 struct ata_port *ap;
763
764 if (!dev_is_sata(dev))
765 return false;
766 ap = dev->sata_dev.ap;
767 /* consume fully initialized ata ports */
768 smp_rmb();
769 return !!ap;
770}
771
James Bottomley00dd4992011-01-23 09:44:12 -0600772void sas_ata_strategy_handler(struct Scsi_Host *shost)
773{
Dan Williams87c83312011-11-17 17:59:51 -0800774 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
Dan Williams50824d62011-12-04 01:06:24 -0800775 LIST_HEAD(async);
Dan Williams9508a662012-01-18 20:47:01 -0800776 int i;
Dan Williams87c83312011-11-17 17:59:51 -0800777
778 /* it's ok to defer revalidation events during ata eh, these
779 * disks are in one of three states:
780 * 1/ present for initial domain discovery, and these
781 * resets will cause bcn flutters
782 * 2/ hot removed, we'll discover that after eh fails
783 * 3/ hot added after initial discovery, lost the race, and need
784 * to catch the next train.
785 */
786 sas_disable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600787
Dan Williams9508a662012-01-18 20:47:01 -0800788 spin_lock_irq(&sas_ha->phy_port_lock);
789 for (i = 0; i < sas_ha->num_phys; i++) {
790 struct asd_sas_port *port = sas_ha->sas_port[i];
791 struct domain_device *dev;
James Bottomley00dd4992011-01-23 09:44:12 -0600792
Dan Williams9508a662012-01-18 20:47:01 -0800793 spin_lock(&port->dev_list_lock);
794 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
795 if (!sas_ata_dev_eh_valid(dev))
796 continue;
797 async_schedule_domain(async_sas_ata_eh, dev, &async);
798 }
799 spin_unlock(&port->dev_list_lock);
James Bottomley00dd4992011-01-23 09:44:12 -0600800 }
Dan Williams9508a662012-01-18 20:47:01 -0800801 spin_unlock_irq(&sas_ha->phy_port_lock);
802
Dan Williams50824d62011-12-04 01:06:24 -0800803 async_synchronize_full_domain(&async);
Dan Williams87c83312011-11-17 17:59:51 -0800804
805 sas_enable_revalidation(sas_ha);
James Bottomley00dd4992011-01-23 09:44:12 -0600806}
807
Dan Williamsd230ce62012-01-11 12:08:36 -0800808void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
809 struct list_head *done_q)
James Bottomley00dd4992011-01-23 09:44:12 -0600810{
James Bottomley00dd4992011-01-23 09:44:12 -0600811 struct scsi_cmnd *cmd, *n;
Dan Williamsd214d812012-01-16 11:56:50 -0800812 struct domain_device *eh_dev;
James Bottomley00dd4992011-01-23 09:44:12 -0600813
814 do {
815 LIST_HEAD(sata_q);
Dan Williamsd214d812012-01-16 11:56:50 -0800816 eh_dev = NULL;
James Bottomleyc2991902011-01-23 09:44:12 -0600817
James Bottomley00dd4992011-01-23 09:44:12 -0600818 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
819 struct domain_device *ddev = cmd_to_domain_dev(cmd);
820
821 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
822 continue;
Dan Williamsd214d812012-01-16 11:56:50 -0800823 if (eh_dev && eh_dev != ddev)
James Bottomley00dd4992011-01-23 09:44:12 -0600824 continue;
Dan Williamsd214d812012-01-16 11:56:50 -0800825 eh_dev = ddev;
James Bottomley00dd4992011-01-23 09:44:12 -0600826 list_move(&cmd->eh_entry, &sata_q);
827 }
828
829 if (!list_empty(&sata_q)) {
Dan Williamsd214d812012-01-16 11:56:50 -0800830 struct ata_port *ap = eh_dev->sata_dev.ap;
831
832 sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
James Bottomley00dd4992011-01-23 09:44:12 -0600833 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
James Bottomleya82058a2011-03-10 17:13:18 -0600834 /*
835 * ata's error handler may leave the cmd on the list
836 * so make sure they don't remain on a stack list
837 * about to go out of scope.
838 *
839 * This looks strange, since the commands are
840 * now part of no list, but the next error
841 * action will be ata_port_error_handler()
842 * which takes no list and sweeps them up
843 * anyway from the ata tag array.
844 */
845 while (!list_empty(&sata_q))
846 list_del_init(sata_q.next);
James Bottomley00dd4992011-01-23 09:44:12 -0600847 }
Dan Williamsd214d812012-01-16 11:56:50 -0800848 } while (eh_dev);
James Bottomley00dd4992011-01-23 09:44:12 -0600849}
Dan Williamsb52df412011-11-30 23:23:33 -0800850
851void sas_ata_schedule_reset(struct domain_device *dev)
852{
853 struct ata_eh_info *ehi;
854 struct ata_port *ap;
855 unsigned long flags;
856
857 if (!dev_is_sata(dev))
858 return;
859
860 ap = dev->sata_dev.ap;
861 ehi = &ap->link.eh_info;
862
863 spin_lock_irqsave(ap->lock, flags);
864 ehi->err_mask |= AC_ERR_TIMEOUT;
865 ehi->action |= ATA_EH_RESET;
866 ata_port_schedule_eh(ap);
867 spin_unlock_irqrestore(ap->lock, flags);
868}
Dan Williams43a5ab12011-12-08 23:20:44 -0800869EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
Dan Williams81c757b2011-12-02 16:07:01 -0800870
871void sas_ata_wait_eh(struct domain_device *dev)
872{
873 struct ata_port *ap;
874
875 if (!dev_is_sata(dev))
876 return;
877
878 ap = dev->sata_dev.ap;
879 ata_port_wait_eh(ap);
880}