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338ec570 DW |
1 | /* |
2 | * Support for SATA devices on Serial Attached SCSI (SAS) controllers | |
3 | * | |
4 | * Copyright (C) 2006 IBM Corporation | |
5 | * | |
6 | * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
21 | * USA | |
22 | */ | |
23 | ||
b9142174 | 24 | #include <linux/scatterlist.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
50824d6c | 26 | #include <linux/async.h> |
43a5ab15 | 27 | #include <linux/export.h> |
b9142174 | 28 | |
338ec570 DW |
29 | #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" | |
3a2755af DW |
38 | #include "../scsi_transport_api.h" |
39 | #include <scsi/scsi_eh.h> | |
338ec570 DW |
40 | |
41 | static 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 | ||
338ec570 DW |
76 | case SAS_OPEN_TO: |
77 | case SAS_OPEN_REJECT: | |
78 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", | |
cadbd4a5 | 79 | __func__, ts->stat); |
338ec570 DW |
80 | return AC_ERR_OTHER; |
81 | ||
75c0b386 | 82 | case SAM_STAT_CHECK_CONDITION: |
338ec570 DW |
83 | 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 | ||
95 | static void sas_ata_task_done(struct sas_task *task) | |
96 | { | |
97 | struct ata_queued_cmd *qc = task->uldd_task; | |
9095a64a | 98 | struct domain_device *dev = task->dev; |
338ec570 DW |
99 | struct task_status_struct *stat = &task->task_status; |
100 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; | |
9095a64a | 101 | struct sas_ha_struct *sas_ha = dev->port->ha; |
338ec570 | 102 | enum ata_completion_errors ac; |
3eb7a51a | 103 | unsigned long flags; |
bb650a1b | 104 | struct ata_link *link; |
3dff5721 | 105 | struct ata_port *ap; |
338ec570 | 106 | |
9095a64a DW |
107 | 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 | ||
1c50dc83 DW |
118 | if (!qc) |
119 | goto qc_already_gone; | |
120 | ||
3dff5721 | 121 | ap = qc->ap; |
3dff5721 DW |
122 | link = &ap->link; |
123 | ||
124 | 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 | } | |
1c50dc83 | 138 | |
75c0b386 JB |
139 | 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))) { | |
6ef1b512 | 142 | memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE); |
bb650a1b XY |
143 | |
144 | if (!link->sactive) { | |
6ef1b512 | 145 | qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]); |
bb650a1b | 146 | } else { |
6ef1b512 | 147 | link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]); |
bb650a1b XY |
148 | if (unlikely(link->eh_info.err_mask)) |
149 | qc->flags |= ATA_QCFLAG_FAILED; | |
150 | } | |
75c0b386 | 151 | } else { |
338ec570 DW |
152 | ac = sas_to_ata_err(stat); |
153 | if (ac) { | |
cadbd4a5 | 154 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
338ec570 DW |
155 | stat->stat); |
156 | /* We saw a SAS error. Send a vague error. */ | |
bb650a1b XY |
157 | 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 | ||
6ef1b512 DW |
164 | dev->sata_dev.fis[3] = 0x04; /* status err */ |
165 | dev->sata_dev.fis[2] = ATA_ERR; | |
338ec570 DW |
166 | } |
167 | } | |
168 | ||
1c50dc83 | 169 | qc->lldd_task = NULL; |
338ec570 | 170 | ata_qc_complete(qc); |
3dff5721 | 171 | spin_unlock_irqrestore(ap->lock, flags); |
3eb7a51a | 172 | |
1c50dc83 | 173 | qc_already_gone: |
338ec570 DW |
174 | list_del_init(&task->list); |
175 | sas_free_task(task); | |
176 | } | |
177 | ||
178 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) | |
179 | { | |
312d3e56 | 180 | unsigned long flags; |
338ec570 | 181 | struct sas_task *task; |
312d3e56 DW |
182 | 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; | |
338ec570 DW |
187 | 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); | |
312d3e56 DW |
190 | |
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); | |
338ec570 | 196 | |
56dd2c06 | 197 | /* If the device fell off, no sense in issuing commands */ |
e139942d | 198 | if (test_bit(SAS_DEV_GONE, &dev->state)) |
312d3e56 | 199 | goto out; |
56dd2c06 | 200 | |
338ec570 DW |
201 | task = sas_alloc_task(GFP_ATOMIC); |
202 | if (!task) | |
312d3e56 | 203 | goto out; |
338ec570 DW |
204 | 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 | ||
110dd8f1 | 214 | ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis); |
338ec570 | 215 | task->uldd_task = qc; |
405e66b3 | 216 | if (ata_is_atapi(qc->tf.protocol)) { |
338ec570 | 217 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
dde20207 JB |
218 | task->total_xfer_len = qc->nbytes; |
219 | task->num_scatter = qc->n_elem; | |
338ec570 | 220 | } else { |
ff2aeb1e | 221 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
338ec570 | 222 | xfer += sg->length; |
338ec570 DW |
223 | |
224 | task->total_xfer_len = xfer; | |
ff2aeb1e | 225 | task->num_scatter = si; |
338ec570 DW |
226 | } |
227 | ||
228 | task->data_dir = qc->dma_dir; | |
ff2aeb1e | 229 | task->scatter = qc->sg; |
338ec570 DW |
230 | task->ata_task.retry_count = 1; |
231 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 232 | qc->lldd_task = task; |
338ec570 DW |
233 | |
234 | switch (qc->tf.protocol) { | |
235 | case ATA_PROT_NCQ: | |
236 | task->ata_task.use_ncq = 1; | |
237 | /* fall through */ | |
0dc36888 | 238 | case ATAPI_PROT_DMA: |
338ec570 DW |
239 | case ATA_PROT_DMA: |
240 | task->ata_task.dma_xfer = 1; | |
241 | break; | |
242 | } | |
243 | ||
fe059f12 DW |
244 | if (qc->scsicmd) |
245 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
246 | ||
338ec570 | 247 | if (sas_ha->lldd_max_execute_num < 2) |
312d3e56 | 248 | ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); |
338ec570 | 249 | else |
312d3e56 | 250 | ret = sas_queue_up(task); |
338ec570 DW |
251 | |
252 | /* Examine */ | |
312d3e56 DW |
253 | if (ret) { |
254 | SAS_DPRINTK("lldd_execute_task returned: %d\n", ret); | |
338ec570 | 255 | |
fe059f12 DW |
256 | if (qc->scsicmd) |
257 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 258 | sas_free_task(task); |
312d3e56 | 259 | ret = AC_ERR_SYSTEM; |
338ec570 DW |
260 | } |
261 | ||
312d3e56 DW |
262 | out: |
263 | spin_lock(ap->lock); | |
264 | local_irq_restore(flags); | |
265 | return ret; | |
338ec570 DW |
266 | } |
267 | ||
4c9bf4e7 TH |
268 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
269 | { | |
270 | struct domain_device *dev = qc->ap->private_data; | |
271 | ||
6ef1b512 | 272 | ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf); |
4c9bf4e7 TH |
273 | return true; |
274 | } | |
275 | ||
36a39947 DW |
276 | static 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 | ||
354cf829 DW |
281 | static void sas_get_ata_command_set(struct domain_device *dev); |
282 | ||
283 | int 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) | |
aa9f8328 | 288 | dev->tproto |= SAS_SATA_DEV; |
354cf829 | 289 | |
aa9f8328 JB |
290 | if (phy->attached_dev_type == SAS_SATA_PENDING) |
291 | dev->dev_type = SAS_SATA_PENDING; | |
354cf829 DW |
292 | else { |
293 | int res; | |
294 | ||
aa9f8328 | 295 | dev->dev_type = SAS_SATA_DEV; |
354cf829 DW |
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 | ||
312 | static 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 */ | |
aa9f8328 | 317 | if (dev->dev_type != SAS_SATA_PENDING) |
354cf829 DW |
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 | ||
36a39947 | 330 | static int smp_ata_check_ready(struct ata_link *link) |
338ec570 | 331 | { |
36a39947 | 332 | int res; |
00dd4998 | 333 | struct ata_port *ap = link->ap; |
338ec570 | 334 | struct domain_device *dev = ap->private_data; |
36a39947 | 335 | struct domain_device *ex_dev = dev->parent; |
f41a0c44 | 336 | struct sas_phy *phy = sas_get_local_phy(dev); |
354cf829 | 337 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number]; |
338ec570 | 338 | |
354cf829 | 339 | res = sas_ex_phy_discover(ex_dev, phy->number); |
f41a0c44 | 340 | sas_put_local_phy(phy); |
354cf829 | 341 | |
36a39947 DW |
342 | /* break the wait early if the expander is unreachable, |
343 | * otherwise keep polling | |
344 | */ | |
345 | if (res == -ECOMM) | |
346 | return res; | |
354cf829 | 347 | if (res != SMP_RESP_FUNC_ACC) |
36a39947 | 348 | return 0; |
354cf829 DW |
349 | |
350 | switch (ex_phy->attached_dev_type) { | |
aa9f8328 | 351 | case SAS_SATA_PENDING: |
354cf829 | 352 | return 0; |
aa9f8328 | 353 | case SAS_END_DEVICE: |
354cf829 DW |
354 | if (ex_phy->attached_sata_dev) |
355 | return sas_ata_clear_pending(dev, ex_phy); | |
356 | default: | |
357 | return -ENODEV; | |
358 | } | |
36a39947 | 359 | } |
338ec570 | 360 | |
36a39947 DW |
361 | static int local_ata_check_ready(struct ata_link *link) |
362 | { | |
363 | struct ata_port *ap = link->ap; | |
364 | struct domain_device *dev = ap->private_data; | |
365 | struct sas_internal *i = dev_to_sas_internal(dev); | |
366 | ||
367 | 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; | |
00dd4998 | 375 | } |
36a39947 | 376 | } |
338ec570 | 377 | |
d214d81e DW |
378 | static 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 | ||
36a39947 DW |
400 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
401 | unsigned long deadline) | |
402 | { | |
403 | int ret = 0, res; | |
f41a0c44 | 404 | struct sas_phy *phy; |
36a39947 DW |
405 | struct ata_port *ap = link->ap; |
406 | int (*check_ready)(struct ata_link *link); | |
407 | struct domain_device *dev = ap->private_data; | |
36a39947 DW |
408 | struct sas_internal *i = dev_to_sas_internal(dev); |
409 | ||
410 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
26a2e68f DW |
411 | if (res == -ENODEV) |
412 | return res; | |
36a39947 DW |
413 | |
414 | if (res != TMF_RESP_FUNC_COMPLETE) | |
d214d81e | 415 | sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n"); |
36a39947 | 416 | |
f41a0c44 | 417 | phy = sas_get_local_phy(dev); |
36a39947 DW |
418 | if (scsi_is_sas_phy_local(phy)) |
419 | check_ready = local_ata_check_ready; | |
420 | else | |
421 | check_ready = smp_ata_check_ready; | |
f41a0c44 | 422 | sas_put_local_phy(phy); |
36a39947 DW |
423 | |
424 | ret = ata_wait_after_reset(link, deadline, check_ready); | |
425 | if (ret && ret != -EAGAIN) | |
d214d81e | 426 | sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret); |
36a39947 DW |
427 | |
428 | /* XXX: if the class changes during the reset the upper layer | |
429 | * should be informed, if the device has gone away we assume | |
430 | * libsas will eventually delete it | |
431 | */ | |
338ec570 | 432 | switch (dev->sata_dev.command_set) { |
36a39947 DW |
433 | case ATA_COMMAND_SET: |
434 | *class = ATA_DEV_ATA; | |
435 | break; | |
436 | case ATAPI_COMMAND_SET: | |
437 | *class = ATA_DEV_ATAPI; | |
438 | break; | |
338ec570 DW |
439 | } |
440 | ||
441 | ap->cbl = ATA_CBL_SATA; | |
00dd4998 | 442 | return ret; |
338ec570 DW |
443 | } |
444 | ||
3dff5721 DW |
445 | /* |
446 | * notify the lldd to forget the sas_task for this internal ata command | |
447 | * that bypasses scsi-eh | |
448 | */ | |
449 | static void sas_ata_internal_abort(struct sas_task *task) | |
450 | { | |
36a39947 | 451 | struct sas_internal *si = dev_to_sas_internal(task->dev); |
3dff5721 DW |
452 | unsigned long flags; |
453 | int res; | |
454 | ||
455 | spin_lock_irqsave(&task->task_state_lock, flags); | |
456 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || | |
457 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
458 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
459 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, | |
460 | task); | |
461 | goto out; | |
462 | } | |
463 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
464 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
465 | ||
466 | res = si->dft->lldd_abort_task(task); | |
467 | ||
468 | spin_lock_irqsave(&task->task_state_lock, flags); | |
469 | if (task->task_state_flags & SAS_TASK_STATE_DONE || | |
470 | res == TMF_RESP_FUNC_COMPLETE) { | |
471 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
472 | goto out; | |
473 | } | |
474 | ||
475 | /* XXX we are not prepared to deal with ->lldd_abort_task() | |
476 | * failures. TODO: lldds need to unconditionally forget about | |
477 | * aborted ata tasks, otherwise we (likely) leak the sas task | |
478 | * here | |
479 | */ | |
480 | SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task); | |
481 | ||
482 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
483 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
484 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
485 | ||
486 | return; | |
487 | out: | |
488 | list_del_init(&task->list); | |
489 | sas_free_task(task); | |
490 | } | |
491 | ||
338ec570 DW |
492 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
493 | { | |
494 | if (qc->flags & ATA_QCFLAG_FAILED) | |
495 | qc->err_mask |= AC_ERR_OTHER; | |
496 | ||
1c50dc83 DW |
497 | if (qc->err_mask) { |
498 | /* | |
3dff5721 DW |
499 | * Find the sas_task and kill it. By this point, libata |
500 | * has decided to kill the qc and has frozen the port. | |
501 | * In this state sas_ata_task_done() will no longer free | |
502 | * the sas_task, so we need to notify the lldd (via | |
503 | * ->lldd_abort_task) that the task is dead and free it | |
504 | * ourselves. | |
1c50dc83 DW |
505 | */ |
506 | struct sas_task *task = qc->lldd_task; | |
1c50dc83 DW |
507 | |
508 | qc->lldd_task = NULL; | |
3a2cdf39 DW |
509 | if (!task) |
510 | return; | |
511 | task->uldd_task = NULL; | |
512 | sas_ata_internal_abort(task); | |
1c50dc83 | 513 | } |
338ec570 DW |
514 | } |
515 | ||
b91bb296 DW |
516 | |
517 | static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) | |
518 | { | |
519 | struct domain_device *dev = ap->private_data; | |
36a39947 | 520 | struct sas_internal *i = dev_to_sas_internal(dev); |
b91bb296 DW |
521 | |
522 | if (i->dft->lldd_ata_set_dmamode) | |
523 | i->dft->lldd_ata_set_dmamode(dev); | |
524 | } | |
525 | ||
e4a9c373 DW |
526 | static void sas_ata_sched_eh(struct ata_port *ap) |
527 | { | |
528 | struct domain_device *dev = ap->private_data; | |
529 | struct sas_ha_struct *ha = dev->port->ha; | |
530 | unsigned long flags; | |
531 | ||
532 | spin_lock_irqsave(&ha->lock, flags); | |
533 | if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state)) | |
534 | ha->eh_active++; | |
535 | ata_std_sched_eh(ap); | |
536 | spin_unlock_irqrestore(&ha->lock, flags); | |
537 | } | |
538 | ||
539 | void sas_ata_end_eh(struct ata_port *ap) | |
540 | { | |
541 | struct domain_device *dev = ap->private_data; | |
542 | struct sas_ha_struct *ha = dev->port->ha; | |
543 | unsigned long flags; | |
544 | ||
545 | spin_lock_irqsave(&ha->lock, flags); | |
546 | if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state)) | |
547 | ha->eh_active--; | |
548 | spin_unlock_irqrestore(&ha->lock, flags); | |
549 | } | |
550 | ||
338ec570 | 551 | static struct ata_port_operations sas_sata_ops = { |
00dd4998 | 552 | .prereset = ata_std_prereset, |
00dd4998 JB |
553 | .hardreset = sas_ata_hard_reset, |
554 | .postreset = ata_std_postreset, | |
555 | .error_handler = ata_std_error_handler, | |
338ec570 | 556 | .post_internal_cmd = sas_ata_post_internal, |
f0ad30d3 | 557 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
558 | .qc_prep = ata_noop_qc_prep, |
559 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 560 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
561 | .port_start = ata_sas_port_start, |
562 | .port_stop = ata_sas_port_stop, | |
b91bb296 | 563 | .set_dmamode = sas_ata_set_dmamode, |
e4a9c373 DW |
564 | .sched_eh = sas_ata_sched_eh, |
565 | .end_eh = sas_ata_end_eh, | |
338ec570 DW |
566 | }; |
567 | ||
568 | static struct ata_port_info sata_port_info = { | |
9cbe056f | 569 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, |
0f2e0330 SS |
570 | .pio_mask = ATA_PIO4, |
571 | .mwdma_mask = ATA_MWDMA2, | |
338ec570 DW |
572 | .udma_mask = ATA_UDMA6, |
573 | .port_ops = &sas_sata_ops | |
574 | }; | |
575 | ||
b2024459 | 576 | int sas_ata_init(struct domain_device *found_dev) |
338ec570 | 577 | { |
9508a66f DW |
578 | struct sas_ha_struct *ha = found_dev->port->ha; |
579 | struct Scsi_Host *shost = ha->core.shost; | |
338ec570 | 580 | struct ata_port *ap; |
b2024459 | 581 | int rc; |
338ec570 | 582 | |
8d8e7d13 | 583 | ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops); |
338ec570 DW |
584 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, |
585 | &sata_port_info, | |
586 | shost); | |
587 | if (!ap) { | |
588 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
589 | return -ENODEV; | |
590 | } | |
591 | ||
592 | ap->private_data = found_dev; | |
593 | ap->cbl = ATA_CBL_SATA; | |
594 | ap->scsi_host = shost; | |
b2024459 DW |
595 | rc = ata_sas_port_init(ap); |
596 | if (rc) { | |
597 | ata_sas_port_destroy(ap); | |
598 | return rc; | |
599 | } | |
338ec570 DW |
600 | found_dev->sata_dev.ap = ap; |
601 | ||
602 | return 0; | |
603 | } | |
3a2755af DW |
604 | |
605 | void sas_ata_task_abort(struct sas_task *task) | |
606 | { | |
607 | struct ata_queued_cmd *qc = task->uldd_task; | |
608 | struct completion *waiting; | |
609 | ||
610 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
611 | if (qc->scsicmd) { | |
1b4d0d8e JB |
612 | struct request_queue *q = qc->scsicmd->device->request_queue; |
613 | unsigned long flags; | |
614 | ||
70b25f89 | 615 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 616 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 617 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
618 | return; |
619 | } | |
620 | ||
621 | /* Internal command, fake a timeout and complete. */ | |
622 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
623 | qc->flags |= ATA_QCFLAG_FAILED; | |
624 | qc->err_mask |= AC_ERR_TIMEOUT; | |
625 | waiting = qc->private_data; | |
626 | complete(waiting); | |
627 | } | |
b9142174 | 628 | |
b9142174 JB |
629 | static void sas_get_ata_command_set(struct domain_device *dev) |
630 | { | |
631 | struct dev_to_host_fis *fis = | |
632 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
633 | ||
aa9f8328 | 634 | if (dev->dev_type == SAS_SATA_PENDING) |
354cf829 DW |
635 | return; |
636 | ||
b9142174 JB |
637 | if ((fis->sector_count == 1 && /* ATA */ |
638 | fis->lbal == 1 && | |
639 | fis->lbam == 0 && | |
640 | fis->lbah == 0 && | |
641 | fis->device == 0) | |
642 | || | |
643 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
644 | fis->lbal == 0 && | |
645 | fis->lbam == 0xCE && | |
646 | fis->lbah == 0xAA && | |
647 | (fis->device & ~0x10) == 0)) | |
648 | ||
649 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
650 | ||
651 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
652 | fis->lbal == 1 && | |
653 | fis->byte_count_low == 0x14 && | |
654 | fis->byte_count_high == 0xEB && | |
655 | (fis->device & ~0x10) == 0)) | |
656 | ||
657 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
658 | ||
659 | else if ((fis->sector_count == 1 && /* SEMB */ | |
660 | fis->lbal == 1 && | |
661 | fis->lbam == 0x3C && | |
662 | fis->lbah == 0xC3 && | |
663 | fis->device == 0) | |
664 | || | |
665 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
666 | fis->lbal == 1 && | |
667 | fis->byte_count_low == 0x69 && | |
668 | fis->byte_count_high == 0x96 && | |
669 | (fis->device & ~0x10) == 0)) | |
670 | ||
671 | /* Treat it as a superset? */ | |
672 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
673 | } | |
674 | ||
9508a66f DW |
675 | void sas_probe_sata(struct asd_sas_port *port) |
676 | { | |
677 | struct domain_device *dev, *n; | |
9508a66f DW |
678 | |
679 | mutex_lock(&port->ha->disco_mutex); | |
b2024459 | 680 | list_for_each_entry(dev, &port->disco_list, disco_list_node) { |
9508a66f DW |
681 | if (!dev_is_sata(dev)) |
682 | continue; | |
683 | ||
b2024459 | 684 | ata_sas_async_probe(dev->sata_dev.ap); |
9508a66f DW |
685 | } |
686 | mutex_unlock(&port->ha->disco_mutex); | |
687 | ||
688 | list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { | |
689 | if (!dev_is_sata(dev)) | |
690 | continue; | |
691 | ||
692 | sas_ata_wait_eh(dev); | |
693 | ||
694 | /* if libata could not bring the link up, don't surface | |
695 | * the device | |
696 | */ | |
697 | if (ata_dev_disabled(sas_to_ata_dev(dev))) | |
698 | sas_fail_probe(dev, __func__, -ENODEV); | |
699 | } | |
303694ee DW |
700 | |
701 | } | |
702 | ||
703 | static bool sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func) | |
704 | { | |
705 | struct domain_device *dev, *n; | |
706 | bool retry = false; | |
707 | ||
708 | list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) { | |
709 | int rc; | |
710 | ||
711 | if (!dev_is_sata(dev)) | |
712 | continue; | |
713 | ||
714 | sas_ata_wait_eh(dev); | |
715 | rc = dev->sata_dev.pm_result; | |
716 | if (rc == -EAGAIN) | |
717 | retry = true; | |
718 | else if (rc) { | |
719 | /* since we don't have a | |
720 | * ->port_{suspend|resume} routine in our | |
721 | * ata_port ops, and no entanglements with | |
722 | * acpi, suspend should just be mechanical trip | |
723 | * through eh, catch cases where these | |
724 | * assumptions are invalidated | |
725 | */ | |
726 | WARN_ONCE(1, "failed %s %s error: %d\n", func, | |
727 | dev_name(&dev->rphy->dev), rc); | |
728 | } | |
729 | ||
730 | /* if libata failed to power manage the device, tear it down */ | |
731 | if (ata_dev_disabled(sas_to_ata_dev(dev))) | |
732 | sas_fail_probe(dev, func, -ENODEV); | |
733 | } | |
734 | ||
735 | return retry; | |
736 | } | |
737 | ||
738 | void sas_suspend_sata(struct asd_sas_port *port) | |
739 | { | |
740 | struct domain_device *dev; | |
741 | ||
742 | retry: | |
743 | mutex_lock(&port->ha->disco_mutex); | |
744 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
745 | struct sata_device *sata; | |
746 | ||
747 | if (!dev_is_sata(dev)) | |
748 | continue; | |
749 | ||
750 | sata = &dev->sata_dev; | |
751 | if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND) | |
752 | continue; | |
753 | ||
754 | sata->pm_result = -EIO; | |
755 | ata_sas_port_async_suspend(sata->ap, &sata->pm_result); | |
756 | } | |
757 | mutex_unlock(&port->ha->disco_mutex); | |
758 | ||
759 | if (sas_ata_flush_pm_eh(port, __func__)) | |
760 | goto retry; | |
761 | } | |
762 | ||
763 | void sas_resume_sata(struct asd_sas_port *port) | |
764 | { | |
765 | struct domain_device *dev; | |
766 | ||
767 | retry: | |
768 | mutex_lock(&port->ha->disco_mutex); | |
769 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
770 | struct sata_device *sata; | |
771 | ||
772 | if (!dev_is_sata(dev)) | |
773 | continue; | |
774 | ||
775 | sata = &dev->sata_dev; | |
776 | if (sata->ap->pm_mesg.event == PM_EVENT_ON) | |
777 | continue; | |
778 | ||
779 | sata->pm_result = -EIO; | |
780 | ata_sas_port_async_resume(sata->ap, &sata->pm_result); | |
781 | } | |
782 | mutex_unlock(&port->ha->disco_mutex); | |
783 | ||
784 | if (sas_ata_flush_pm_eh(port, __func__)) | |
785 | goto retry; | |
9508a66f DW |
786 | } |
787 | ||
b9142174 JB |
788 | /** |
789 | * sas_discover_sata -- discover an STP/SATA domain device | |
790 | * @dev: pointer to struct domain_device of interest | |
791 | * | |
b91bb296 DW |
792 | * Devices directly attached to a HA port, have no parents. All other |
793 | * devices do, and should have their "parent" pointer set appropriately | |
794 | * before calling this function. | |
b9142174 JB |
795 | */ |
796 | int sas_discover_sata(struct domain_device *dev) | |
797 | { | |
798 | int res; | |
799 | ||
aa9f8328 | 800 | if (dev->dev_type == SAS_SATA_PM) |
b91bb296 | 801 | return -ENODEV; |
87c8331f | 802 | |
b91bb296 DW |
803 | sas_get_ata_command_set(dev); |
804 | sas_fill_in_rphy(dev, dev->rphy); | |
87c8331f DW |
805 | |
806 | res = sas_notify_lldd_dev_found(dev); | |
807 | if (res) | |
808 | return res; | |
809 | ||
810 | sas_discover_event(dev->port, DISCE_PROBE); | |
b91bb296 | 811 | return 0; |
b9142174 | 812 | } |
00dd4998 | 813 | |
50824d6c DW |
814 | static void async_sas_ata_eh(void *data, async_cookie_t cookie) |
815 | { | |
816 | struct domain_device *dev = data; | |
817 | struct ata_port *ap = dev->sata_dev.ap; | |
818 | struct sas_ha_struct *ha = dev->port->ha; | |
819 | ||
d214d81e | 820 | sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n"); |
50824d6c | 821 | ata_scsi_port_error_handler(ha->core.shost, ap); |
8abda4d2 | 822 | sas_put_device(dev); |
50824d6c DW |
823 | } |
824 | ||
00dd4998 JB |
825 | void sas_ata_strategy_handler(struct Scsi_Host *shost) |
826 | { | |
87c8331f | 827 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); |
2955b47d | 828 | ASYNC_DOMAIN_EXCLUSIVE(async); |
9508a66f | 829 | int i; |
87c8331f DW |
830 | |
831 | /* it's ok to defer revalidation events during ata eh, these | |
832 | * disks are in one of three states: | |
833 | * 1/ present for initial domain discovery, and these | |
834 | * resets will cause bcn flutters | |
835 | * 2/ hot removed, we'll discover that after eh fails | |
836 | * 3/ hot added after initial discovery, lost the race, and need | |
837 | * to catch the next train. | |
838 | */ | |
839 | sas_disable_revalidation(sas_ha); | |
00dd4998 | 840 | |
9508a66f DW |
841 | spin_lock_irq(&sas_ha->phy_port_lock); |
842 | for (i = 0; i < sas_ha->num_phys; i++) { | |
843 | struct asd_sas_port *port = sas_ha->sas_port[i]; | |
844 | struct domain_device *dev; | |
00dd4998 | 845 | |
9508a66f DW |
846 | spin_lock(&port->dev_list_lock); |
847 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
b2024459 | 848 | if (!dev_is_sata(dev)) |
9508a66f | 849 | continue; |
e4a9c373 DW |
850 | |
851 | /* hold a reference over eh since we may be | |
852 | * racing with final remove once all commands | |
853 | * are completed | |
854 | */ | |
855 | kref_get(&dev->kref); | |
856 | ||
9508a66f DW |
857 | async_schedule_domain(async_sas_ata_eh, dev, &async); |
858 | } | |
859 | spin_unlock(&port->dev_list_lock); | |
00dd4998 | 860 | } |
9508a66f DW |
861 | spin_unlock_irq(&sas_ha->phy_port_lock); |
862 | ||
50824d6c | 863 | async_synchronize_full_domain(&async); |
87c8331f DW |
864 | |
865 | sas_enable_revalidation(sas_ha); | |
00dd4998 JB |
866 | } |
867 | ||
d230ce69 DW |
868 | void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
869 | struct list_head *done_q) | |
00dd4998 | 870 | { |
00dd4998 | 871 | struct scsi_cmnd *cmd, *n; |
d214d81e | 872 | struct domain_device *eh_dev; |
00dd4998 JB |
873 | |
874 | do { | |
875 | LIST_HEAD(sata_q); | |
d214d81e | 876 | eh_dev = NULL; |
c299190b | 877 | |
00dd4998 JB |
878 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
879 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
880 | ||
881 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) | |
882 | continue; | |
d214d81e | 883 | if (eh_dev && eh_dev != ddev) |
00dd4998 | 884 | continue; |
d214d81e | 885 | eh_dev = ddev; |
00dd4998 JB |
886 | list_move(&cmd->eh_entry, &sata_q); |
887 | } | |
888 | ||
889 | if (!list_empty(&sata_q)) { | |
d214d81e DW |
890 | struct ata_port *ap = eh_dev->sata_dev.ap; |
891 | ||
892 | sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n"); | |
00dd4998 | 893 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
a82058a7 JB |
894 | /* |
895 | * ata's error handler may leave the cmd on the list | |
896 | * so make sure they don't remain on a stack list | |
897 | * about to go out of scope. | |
898 | * | |
899 | * This looks strange, since the commands are | |
900 | * now part of no list, but the next error | |
901 | * action will be ata_port_error_handler() | |
902 | * which takes no list and sweeps them up | |
903 | * anyway from the ata tag array. | |
904 | */ | |
905 | while (!list_empty(&sata_q)) | |
906 | list_del_init(sata_q.next); | |
00dd4998 | 907 | } |
d214d81e | 908 | } while (eh_dev); |
00dd4998 | 909 | } |
b52df417 DW |
910 | |
911 | void sas_ata_schedule_reset(struct domain_device *dev) | |
912 | { | |
913 | struct ata_eh_info *ehi; | |
914 | struct ata_port *ap; | |
915 | unsigned long flags; | |
916 | ||
917 | if (!dev_is_sata(dev)) | |
918 | return; | |
919 | ||
920 | ap = dev->sata_dev.ap; | |
921 | ehi = &ap->link.eh_info; | |
922 | ||
923 | spin_lock_irqsave(ap->lock, flags); | |
924 | ehi->err_mask |= AC_ERR_TIMEOUT; | |
925 | ehi->action |= ATA_EH_RESET; | |
926 | ata_port_schedule_eh(ap); | |
927 | spin_unlock_irqrestore(ap->lock, flags); | |
928 | } | |
43a5ab15 | 929 | EXPORT_SYMBOL_GPL(sas_ata_schedule_reset); |
81c757bc DW |
930 | |
931 | void sas_ata_wait_eh(struct domain_device *dev) | |
932 | { | |
933 | struct ata_port *ap; | |
934 | ||
935 | if (!dev_is_sata(dev)) | |
936 | return; | |
937 | ||
938 | ap = dev->sata_dev.ap; | |
939 | ata_port_wait_eh(ap); | |
940 | } |