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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 && | |
1cbd772d | 141 | dev->sata_dev.class == ATA_DEV_ATAPI))) { |
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 | sas_free_task(task); |
175 | } | |
176 | ||
177 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) | |
178 | { | |
312d3e56 | 179 | unsigned long flags; |
338ec570 | 180 | struct sas_task *task; |
312d3e56 DW |
181 | struct scatterlist *sg; |
182 | int ret = AC_ERR_SYSTEM; | |
183 | unsigned int si, xfer = 0; | |
184 | struct ata_port *ap = qc->ap; | |
185 | struct domain_device *dev = ap->private_data; | |
338ec570 DW |
186 | struct sas_ha_struct *sas_ha = dev->port->ha; |
187 | struct Scsi_Host *host = sas_ha->core.shost; | |
188 | struct sas_internal *i = to_sas_internal(host->transportt); | |
312d3e56 DW |
189 | |
190 | /* TODO: audit callers to ensure they are ready for qc_issue to | |
191 | * unconditionally re-enable interrupts | |
192 | */ | |
193 | local_irq_save(flags); | |
194 | spin_unlock(ap->lock); | |
338ec570 | 195 | |
56dd2c06 | 196 | /* If the device fell off, no sense in issuing commands */ |
e139942d | 197 | if (test_bit(SAS_DEV_GONE, &dev->state)) |
312d3e56 | 198 | goto out; |
56dd2c06 | 199 | |
338ec570 DW |
200 | task = sas_alloc_task(GFP_ATOMIC); |
201 | if (!task) | |
312d3e56 | 202 | goto out; |
338ec570 DW |
203 | task->dev = dev; |
204 | task->task_proto = SAS_PROTOCOL_STP; | |
205 | task->task_done = sas_ata_task_done; | |
206 | ||
207 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || | |
208 | qc->tf.command == ATA_CMD_FPDMA_READ) { | |
209 | /* Need to zero out the tag libata assigned us */ | |
210 | qc->tf.nsect = 0; | |
211 | } | |
212 | ||
ae5fbae0 | 213 | ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis); |
338ec570 | 214 | task->uldd_task = qc; |
405e66b3 | 215 | if (ata_is_atapi(qc->tf.protocol)) { |
338ec570 | 216 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
dde20207 JB |
217 | task->total_xfer_len = qc->nbytes; |
218 | task->num_scatter = qc->n_elem; | |
338ec570 | 219 | } else { |
ff2aeb1e | 220 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
338ec570 | 221 | xfer += sg->length; |
338ec570 DW |
222 | |
223 | task->total_xfer_len = xfer; | |
ff2aeb1e | 224 | task->num_scatter = si; |
338ec570 DW |
225 | } |
226 | ||
227 | task->data_dir = qc->dma_dir; | |
ff2aeb1e | 228 | task->scatter = qc->sg; |
338ec570 DW |
229 | task->ata_task.retry_count = 1; |
230 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 231 | qc->lldd_task = task; |
338ec570 DW |
232 | |
233 | switch (qc->tf.protocol) { | |
234 | case ATA_PROT_NCQ: | |
235 | task->ata_task.use_ncq = 1; | |
236 | /* fall through */ | |
0dc36888 | 237 | case ATAPI_PROT_DMA: |
338ec570 DW |
238 | case ATA_PROT_DMA: |
239 | task->ata_task.dma_xfer = 1; | |
240 | break; | |
241 | } | |
242 | ||
fe059f12 DW |
243 | if (qc->scsicmd) |
244 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
245 | ||
79855d17 | 246 | ret = i->dft->lldd_execute_task(task, GFP_ATOMIC); |
312d3e56 DW |
247 | if (ret) { |
248 | SAS_DPRINTK("lldd_execute_task returned: %d\n", ret); | |
338ec570 | 249 | |
fe059f12 DW |
250 | if (qc->scsicmd) |
251 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 252 | sas_free_task(task); |
312d3e56 | 253 | ret = AC_ERR_SYSTEM; |
338ec570 DW |
254 | } |
255 | ||
312d3e56 DW |
256 | out: |
257 | spin_lock(ap->lock); | |
258 | local_irq_restore(flags); | |
259 | return ret; | |
338ec570 DW |
260 | } |
261 | ||
4c9bf4e7 TH |
262 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
263 | { | |
264 | struct domain_device *dev = qc->ap->private_data; | |
265 | ||
6ef1b512 | 266 | ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf); |
4c9bf4e7 TH |
267 | return true; |
268 | } | |
269 | ||
36a39947 DW |
270 | static struct sas_internal *dev_to_sas_internal(struct domain_device *dev) |
271 | { | |
272 | return to_sas_internal(dev->port->ha->core.shost->transportt); | |
273 | } | |
274 | ||
1cbd772d | 275 | static int sas_get_ata_command_set(struct domain_device *dev); |
354cf829 DW |
276 | |
277 | int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) | |
278 | { | |
279 | if (phy->attached_tproto & SAS_PROTOCOL_STP) | |
280 | dev->tproto = phy->attached_tproto; | |
281 | if (phy->attached_sata_dev) | |
aa9f8328 | 282 | dev->tproto |= SAS_SATA_DEV; |
354cf829 | 283 | |
aa9f8328 JB |
284 | if (phy->attached_dev_type == SAS_SATA_PENDING) |
285 | dev->dev_type = SAS_SATA_PENDING; | |
354cf829 DW |
286 | else { |
287 | int res; | |
288 | ||
aa9f8328 | 289 | dev->dev_type = SAS_SATA_DEV; |
354cf829 DW |
290 | res = sas_get_report_phy_sata(dev->parent, phy->phy_id, |
291 | &dev->sata_dev.rps_resp); | |
292 | if (res) { | |
293 | SAS_DPRINTK("report phy sata to %016llx:0x%x returned " | |
294 | "0x%x\n", SAS_ADDR(dev->parent->sas_addr), | |
295 | phy->phy_id, res); | |
296 | return res; | |
297 | } | |
298 | memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis, | |
299 | sizeof(struct dev_to_host_fis)); | |
1cbd772d | 300 | dev->sata_dev.class = sas_get_ata_command_set(dev); |
354cf829 DW |
301 | } |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy) | |
306 | { | |
307 | int res; | |
308 | ||
309 | /* we weren't pending, so successfully end the reset sequence now */ | |
aa9f8328 | 310 | if (dev->dev_type != SAS_SATA_PENDING) |
354cf829 DW |
311 | return 1; |
312 | ||
313 | /* hmmm, if this succeeds do we need to repost the domain_device to the | |
314 | * lldd so it can pick up new parameters? | |
315 | */ | |
316 | res = sas_get_ata_info(dev, phy); | |
317 | if (res) | |
318 | return 0; /* retry */ | |
319 | else | |
320 | return 1; | |
321 | } | |
322 | ||
36a39947 | 323 | static int smp_ata_check_ready(struct ata_link *link) |
338ec570 | 324 | { |
36a39947 | 325 | int res; |
00dd4998 | 326 | struct ata_port *ap = link->ap; |
338ec570 | 327 | struct domain_device *dev = ap->private_data; |
36a39947 | 328 | struct domain_device *ex_dev = dev->parent; |
f41a0c44 | 329 | struct sas_phy *phy = sas_get_local_phy(dev); |
354cf829 | 330 | struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number]; |
338ec570 | 331 | |
354cf829 | 332 | res = sas_ex_phy_discover(ex_dev, phy->number); |
f41a0c44 | 333 | sas_put_local_phy(phy); |
354cf829 | 334 | |
36a39947 DW |
335 | /* break the wait early if the expander is unreachable, |
336 | * otherwise keep polling | |
337 | */ | |
338 | if (res == -ECOMM) | |
339 | return res; | |
354cf829 | 340 | if (res != SMP_RESP_FUNC_ACC) |
36a39947 | 341 | return 0; |
354cf829 DW |
342 | |
343 | switch (ex_phy->attached_dev_type) { | |
aa9f8328 | 344 | case SAS_SATA_PENDING: |
354cf829 | 345 | return 0; |
aa9f8328 | 346 | case SAS_END_DEVICE: |
354cf829 DW |
347 | if (ex_phy->attached_sata_dev) |
348 | return sas_ata_clear_pending(dev, ex_phy); | |
349 | default: | |
350 | return -ENODEV; | |
351 | } | |
36a39947 | 352 | } |
338ec570 | 353 | |
36a39947 DW |
354 | static int local_ata_check_ready(struct ata_link *link) |
355 | { | |
356 | struct ata_port *ap = link->ap; | |
357 | struct domain_device *dev = ap->private_data; | |
358 | struct sas_internal *i = dev_to_sas_internal(dev); | |
359 | ||
360 | if (i->dft->lldd_ata_check_ready) | |
361 | return i->dft->lldd_ata_check_ready(dev); | |
362 | else { | |
363 | /* lldd's that don't implement 'ready' checking get the | |
364 | * old default behavior of not coordinating reset | |
365 | * recovery with libata | |
366 | */ | |
367 | return 1; | |
00dd4998 | 368 | } |
36a39947 | 369 | } |
338ec570 | 370 | |
d214d81e DW |
371 | static int sas_ata_printk(const char *level, const struct domain_device *ddev, |
372 | const char *fmt, ...) | |
373 | { | |
374 | struct ata_port *ap = ddev->sata_dev.ap; | |
375 | struct device *dev = &ddev->rphy->dev; | |
376 | struct va_format vaf; | |
377 | va_list args; | |
378 | int r; | |
379 | ||
380 | va_start(args, fmt); | |
381 | ||
382 | vaf.fmt = fmt; | |
383 | vaf.va = &args; | |
384 | ||
385 | r = printk("%ssas: ata%u: %s: %pV", | |
386 | level, ap->print_id, dev_name(dev), &vaf); | |
387 | ||
388 | va_end(args); | |
389 | ||
390 | return r; | |
391 | } | |
392 | ||
36a39947 DW |
393 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
394 | unsigned long deadline) | |
395 | { | |
396 | int ret = 0, res; | |
f41a0c44 | 397 | struct sas_phy *phy; |
36a39947 DW |
398 | struct ata_port *ap = link->ap; |
399 | int (*check_ready)(struct ata_link *link); | |
400 | struct domain_device *dev = ap->private_data; | |
36a39947 DW |
401 | struct sas_internal *i = dev_to_sas_internal(dev); |
402 | ||
403 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
26a2e68f DW |
404 | if (res == -ENODEV) |
405 | return res; | |
36a39947 DW |
406 | |
407 | if (res != TMF_RESP_FUNC_COMPLETE) | |
d214d81e | 408 | sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n"); |
36a39947 | 409 | |
f41a0c44 | 410 | phy = sas_get_local_phy(dev); |
36a39947 DW |
411 | if (scsi_is_sas_phy_local(phy)) |
412 | check_ready = local_ata_check_ready; | |
413 | else | |
414 | check_ready = smp_ata_check_ready; | |
f41a0c44 | 415 | sas_put_local_phy(phy); |
36a39947 DW |
416 | |
417 | ret = ata_wait_after_reset(link, deadline, check_ready); | |
418 | if (ret && ret != -EAGAIN) | |
d214d81e | 419 | sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret); |
36a39947 | 420 | |
1cbd772d | 421 | *class = dev->sata_dev.class; |
338ec570 DW |
422 | |
423 | ap->cbl = ATA_CBL_SATA; | |
00dd4998 | 424 | return ret; |
338ec570 DW |
425 | } |
426 | ||
3dff5721 DW |
427 | /* |
428 | * notify the lldd to forget the sas_task for this internal ata command | |
429 | * that bypasses scsi-eh | |
430 | */ | |
431 | static void sas_ata_internal_abort(struct sas_task *task) | |
432 | { | |
36a39947 | 433 | struct sas_internal *si = dev_to_sas_internal(task->dev); |
3dff5721 DW |
434 | unsigned long flags; |
435 | int res; | |
436 | ||
437 | spin_lock_irqsave(&task->task_state_lock, flags); | |
438 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || | |
439 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
440 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
441 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, | |
442 | task); | |
443 | goto out; | |
444 | } | |
445 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
446 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
447 | ||
448 | res = si->dft->lldd_abort_task(task); | |
449 | ||
450 | spin_lock_irqsave(&task->task_state_lock, flags); | |
451 | if (task->task_state_flags & SAS_TASK_STATE_DONE || | |
452 | res == TMF_RESP_FUNC_COMPLETE) { | |
453 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
454 | goto out; | |
455 | } | |
456 | ||
457 | /* XXX we are not prepared to deal with ->lldd_abort_task() | |
458 | * failures. TODO: lldds need to unconditionally forget about | |
459 | * aborted ata tasks, otherwise we (likely) leak the sas task | |
460 | * here | |
461 | */ | |
462 | SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task); | |
463 | ||
464 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
465 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
466 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
467 | ||
468 | return; | |
469 | out: | |
3dff5721 DW |
470 | sas_free_task(task); |
471 | } | |
472 | ||
338ec570 DW |
473 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
474 | { | |
475 | if (qc->flags & ATA_QCFLAG_FAILED) | |
476 | qc->err_mask |= AC_ERR_OTHER; | |
477 | ||
1c50dc83 DW |
478 | if (qc->err_mask) { |
479 | /* | |
3dff5721 DW |
480 | * Find the sas_task and kill it. By this point, libata |
481 | * has decided to kill the qc and has frozen the port. | |
482 | * In this state sas_ata_task_done() will no longer free | |
483 | * the sas_task, so we need to notify the lldd (via | |
484 | * ->lldd_abort_task) that the task is dead and free it | |
485 | * ourselves. | |
1c50dc83 DW |
486 | */ |
487 | struct sas_task *task = qc->lldd_task; | |
1c50dc83 DW |
488 | |
489 | qc->lldd_task = NULL; | |
3a2cdf39 DW |
490 | if (!task) |
491 | return; | |
492 | task->uldd_task = NULL; | |
493 | sas_ata_internal_abort(task); | |
1c50dc83 | 494 | } |
338ec570 DW |
495 | } |
496 | ||
b91bb296 DW |
497 | |
498 | static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) | |
499 | { | |
500 | struct domain_device *dev = ap->private_data; | |
36a39947 | 501 | struct sas_internal *i = dev_to_sas_internal(dev); |
b91bb296 DW |
502 | |
503 | if (i->dft->lldd_ata_set_dmamode) | |
504 | i->dft->lldd_ata_set_dmamode(dev); | |
505 | } | |
506 | ||
e4a9c373 DW |
507 | static void sas_ata_sched_eh(struct ata_port *ap) |
508 | { | |
509 | struct domain_device *dev = ap->private_data; | |
510 | struct sas_ha_struct *ha = dev->port->ha; | |
511 | unsigned long flags; | |
512 | ||
513 | spin_lock_irqsave(&ha->lock, flags); | |
514 | if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state)) | |
515 | ha->eh_active++; | |
516 | ata_std_sched_eh(ap); | |
517 | spin_unlock_irqrestore(&ha->lock, flags); | |
518 | } | |
519 | ||
520 | void sas_ata_end_eh(struct ata_port *ap) | |
521 | { | |
522 | struct domain_device *dev = ap->private_data; | |
523 | struct sas_ha_struct *ha = dev->port->ha; | |
524 | unsigned long flags; | |
525 | ||
526 | spin_lock_irqsave(&ha->lock, flags); | |
527 | if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state)) | |
528 | ha->eh_active--; | |
529 | spin_unlock_irqrestore(&ha->lock, flags); | |
530 | } | |
531 | ||
338ec570 | 532 | static struct ata_port_operations sas_sata_ops = { |
00dd4998 | 533 | .prereset = ata_std_prereset, |
00dd4998 JB |
534 | .hardreset = sas_ata_hard_reset, |
535 | .postreset = ata_std_postreset, | |
536 | .error_handler = ata_std_error_handler, | |
338ec570 | 537 | .post_internal_cmd = sas_ata_post_internal, |
f0ad30d3 | 538 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
539 | .qc_prep = ata_noop_qc_prep, |
540 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 541 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
542 | .port_start = ata_sas_port_start, |
543 | .port_stop = ata_sas_port_stop, | |
b91bb296 | 544 | .set_dmamode = sas_ata_set_dmamode, |
e4a9c373 DW |
545 | .sched_eh = sas_ata_sched_eh, |
546 | .end_eh = sas_ata_end_eh, | |
338ec570 DW |
547 | }; |
548 | ||
549 | static struct ata_port_info sata_port_info = { | |
5067c046 SL |
550 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ | |
551 | ATA_FLAG_SAS_HOST, | |
0f2e0330 SS |
552 | .pio_mask = ATA_PIO4, |
553 | .mwdma_mask = ATA_MWDMA2, | |
338ec570 DW |
554 | .udma_mask = ATA_UDMA6, |
555 | .port_ops = &sas_sata_ops | |
556 | }; | |
557 | ||
b2024459 | 558 | int sas_ata_init(struct domain_device *found_dev) |
338ec570 | 559 | { |
9508a66f DW |
560 | struct sas_ha_struct *ha = found_dev->port->ha; |
561 | struct Scsi_Host *shost = ha->core.shost; | |
338ec570 | 562 | struct ata_port *ap; |
b2024459 | 563 | int rc; |
338ec570 | 564 | |
8d8e7d13 | 565 | ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops); |
338ec570 DW |
566 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, |
567 | &sata_port_info, | |
568 | shost); | |
569 | if (!ap) { | |
570 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
571 | return -ENODEV; | |
572 | } | |
573 | ||
574 | ap->private_data = found_dev; | |
575 | ap->cbl = ATA_CBL_SATA; | |
576 | ap->scsi_host = shost; | |
b2024459 DW |
577 | rc = ata_sas_port_init(ap); |
578 | if (rc) { | |
579 | ata_sas_port_destroy(ap); | |
580 | return rc; | |
581 | } | |
338ec570 DW |
582 | found_dev->sata_dev.ap = ap; |
583 | ||
584 | return 0; | |
585 | } | |
3a2755af DW |
586 | |
587 | void sas_ata_task_abort(struct sas_task *task) | |
588 | { | |
589 | struct ata_queued_cmd *qc = task->uldd_task; | |
590 | struct completion *waiting; | |
591 | ||
592 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
593 | if (qc->scsicmd) { | |
1b4d0d8e JB |
594 | struct request_queue *q = qc->scsicmd->device->request_queue; |
595 | unsigned long flags; | |
596 | ||
70b25f89 | 597 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 598 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 599 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
600 | return; |
601 | } | |
602 | ||
603 | /* Internal command, fake a timeout and complete. */ | |
604 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
605 | qc->flags |= ATA_QCFLAG_FAILED; | |
606 | qc->err_mask |= AC_ERR_TIMEOUT; | |
607 | waiting = qc->private_data; | |
608 | complete(waiting); | |
609 | } | |
b9142174 | 610 | |
1cbd772d | 611 | static int sas_get_ata_command_set(struct domain_device *dev) |
b9142174 JB |
612 | { |
613 | struct dev_to_host_fis *fis = | |
614 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
1cbd772d | 615 | struct ata_taskfile tf; |
b9142174 | 616 | |
aa9f8328 | 617 | if (dev->dev_type == SAS_SATA_PENDING) |
1cbd772d HR |
618 | return ATA_DEV_UNKNOWN; |
619 | ||
620 | ata_tf_from_fis((const u8 *)fis, &tf); | |
354cf829 | 621 | |
1cbd772d | 622 | return ata_dev_classify(&tf); |
b9142174 JB |
623 | } |
624 | ||
9508a66f DW |
625 | void sas_probe_sata(struct asd_sas_port *port) |
626 | { | |
627 | struct domain_device *dev, *n; | |
9508a66f DW |
628 | |
629 | mutex_lock(&port->ha->disco_mutex); | |
b2024459 | 630 | list_for_each_entry(dev, &port->disco_list, disco_list_node) { |
9508a66f DW |
631 | if (!dev_is_sata(dev)) |
632 | continue; | |
633 | ||
b2024459 | 634 | ata_sas_async_probe(dev->sata_dev.ap); |
9508a66f DW |
635 | } |
636 | mutex_unlock(&port->ha->disco_mutex); | |
637 | ||
638 | list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { | |
639 | if (!dev_is_sata(dev)) | |
640 | continue; | |
641 | ||
642 | sas_ata_wait_eh(dev); | |
643 | ||
644 | /* if libata could not bring the link up, don't surface | |
645 | * the device | |
646 | */ | |
647 | if (ata_dev_disabled(sas_to_ata_dev(dev))) | |
648 | sas_fail_probe(dev, __func__, -ENODEV); | |
649 | } | |
303694ee DW |
650 | |
651 | } | |
652 | ||
bc6e7c4b | 653 | static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func) |
303694ee DW |
654 | { |
655 | struct domain_device *dev, *n; | |
303694ee DW |
656 | |
657 | list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) { | |
303694ee DW |
658 | if (!dev_is_sata(dev)) |
659 | continue; | |
660 | ||
661 | sas_ata_wait_eh(dev); | |
303694ee DW |
662 | |
663 | /* if libata failed to power manage the device, tear it down */ | |
664 | if (ata_dev_disabled(sas_to_ata_dev(dev))) | |
665 | sas_fail_probe(dev, func, -ENODEV); | |
666 | } | |
303694ee DW |
667 | } |
668 | ||
669 | void sas_suspend_sata(struct asd_sas_port *port) | |
670 | { | |
671 | struct domain_device *dev; | |
672 | ||
303694ee DW |
673 | mutex_lock(&port->ha->disco_mutex); |
674 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
675 | struct sata_device *sata; | |
676 | ||
677 | if (!dev_is_sata(dev)) | |
678 | continue; | |
679 | ||
680 | sata = &dev->sata_dev; | |
681 | if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND) | |
682 | continue; | |
683 | ||
bc6e7c4b | 684 | ata_sas_port_suspend(sata->ap); |
303694ee DW |
685 | } |
686 | mutex_unlock(&port->ha->disco_mutex); | |
687 | ||
bc6e7c4b | 688 | sas_ata_flush_pm_eh(port, __func__); |
303694ee DW |
689 | } |
690 | ||
691 | void sas_resume_sata(struct asd_sas_port *port) | |
692 | { | |
693 | struct domain_device *dev; | |
694 | ||
303694ee DW |
695 | mutex_lock(&port->ha->disco_mutex); |
696 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
697 | struct sata_device *sata; | |
698 | ||
699 | if (!dev_is_sata(dev)) | |
700 | continue; | |
701 | ||
702 | sata = &dev->sata_dev; | |
703 | if (sata->ap->pm_mesg.event == PM_EVENT_ON) | |
704 | continue; | |
705 | ||
bc6e7c4b | 706 | ata_sas_port_resume(sata->ap); |
303694ee DW |
707 | } |
708 | mutex_unlock(&port->ha->disco_mutex); | |
709 | ||
bc6e7c4b | 710 | sas_ata_flush_pm_eh(port, __func__); |
9508a66f DW |
711 | } |
712 | ||
b9142174 JB |
713 | /** |
714 | * sas_discover_sata -- discover an STP/SATA domain device | |
715 | * @dev: pointer to struct domain_device of interest | |
716 | * | |
b91bb296 DW |
717 | * Devices directly attached to a HA port, have no parents. All other |
718 | * devices do, and should have their "parent" pointer set appropriately | |
719 | * before calling this function. | |
b9142174 JB |
720 | */ |
721 | int sas_discover_sata(struct domain_device *dev) | |
722 | { | |
723 | int res; | |
724 | ||
aa9f8328 | 725 | if (dev->dev_type == SAS_SATA_PM) |
b91bb296 | 726 | return -ENODEV; |
87c8331f | 727 | |
1cbd772d | 728 | dev->sata_dev.class = sas_get_ata_command_set(dev); |
b91bb296 | 729 | sas_fill_in_rphy(dev, dev->rphy); |
87c8331f DW |
730 | |
731 | res = sas_notify_lldd_dev_found(dev); | |
732 | if (res) | |
733 | return res; | |
734 | ||
735 | sas_discover_event(dev->port, DISCE_PROBE); | |
b91bb296 | 736 | return 0; |
b9142174 | 737 | } |
00dd4998 | 738 | |
50824d6c DW |
739 | static void async_sas_ata_eh(void *data, async_cookie_t cookie) |
740 | { | |
741 | struct domain_device *dev = data; | |
742 | struct ata_port *ap = dev->sata_dev.ap; | |
743 | struct sas_ha_struct *ha = dev->port->ha; | |
744 | ||
d214d81e | 745 | sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n"); |
50824d6c | 746 | ata_scsi_port_error_handler(ha->core.shost, ap); |
8abda4d2 | 747 | sas_put_device(dev); |
50824d6c DW |
748 | } |
749 | ||
00dd4998 JB |
750 | void sas_ata_strategy_handler(struct Scsi_Host *shost) |
751 | { | |
87c8331f | 752 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); |
2955b47d | 753 | ASYNC_DOMAIN_EXCLUSIVE(async); |
9508a66f | 754 | int i; |
87c8331f DW |
755 | |
756 | /* it's ok to defer revalidation events during ata eh, these | |
757 | * disks are in one of three states: | |
758 | * 1/ present for initial domain discovery, and these | |
759 | * resets will cause bcn flutters | |
760 | * 2/ hot removed, we'll discover that after eh fails | |
761 | * 3/ hot added after initial discovery, lost the race, and need | |
762 | * to catch the next train. | |
763 | */ | |
764 | sas_disable_revalidation(sas_ha); | |
00dd4998 | 765 | |
9508a66f DW |
766 | spin_lock_irq(&sas_ha->phy_port_lock); |
767 | for (i = 0; i < sas_ha->num_phys; i++) { | |
768 | struct asd_sas_port *port = sas_ha->sas_port[i]; | |
769 | struct domain_device *dev; | |
00dd4998 | 770 | |
9508a66f DW |
771 | spin_lock(&port->dev_list_lock); |
772 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { | |
b2024459 | 773 | if (!dev_is_sata(dev)) |
9508a66f | 774 | continue; |
e4a9c373 DW |
775 | |
776 | /* hold a reference over eh since we may be | |
777 | * racing with final remove once all commands | |
778 | * are completed | |
779 | */ | |
780 | kref_get(&dev->kref); | |
781 | ||
9508a66f DW |
782 | async_schedule_domain(async_sas_ata_eh, dev, &async); |
783 | } | |
784 | spin_unlock(&port->dev_list_lock); | |
00dd4998 | 785 | } |
9508a66f DW |
786 | spin_unlock_irq(&sas_ha->phy_port_lock); |
787 | ||
50824d6c | 788 | async_synchronize_full_domain(&async); |
87c8331f DW |
789 | |
790 | sas_enable_revalidation(sas_ha); | |
00dd4998 JB |
791 | } |
792 | ||
d230ce69 DW |
793 | void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
794 | struct list_head *done_q) | |
00dd4998 | 795 | { |
00dd4998 | 796 | struct scsi_cmnd *cmd, *n; |
d214d81e | 797 | struct domain_device *eh_dev; |
00dd4998 JB |
798 | |
799 | do { | |
800 | LIST_HEAD(sata_q); | |
d214d81e | 801 | eh_dev = NULL; |
c299190b | 802 | |
00dd4998 JB |
803 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
804 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
805 | ||
806 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) | |
807 | continue; | |
d214d81e | 808 | if (eh_dev && eh_dev != ddev) |
00dd4998 | 809 | continue; |
d214d81e | 810 | eh_dev = ddev; |
00dd4998 JB |
811 | list_move(&cmd->eh_entry, &sata_q); |
812 | } | |
813 | ||
814 | if (!list_empty(&sata_q)) { | |
d214d81e DW |
815 | struct ata_port *ap = eh_dev->sata_dev.ap; |
816 | ||
817 | sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n"); | |
00dd4998 | 818 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
a82058a7 JB |
819 | /* |
820 | * ata's error handler may leave the cmd on the list | |
821 | * so make sure they don't remain on a stack list | |
822 | * about to go out of scope. | |
823 | * | |
824 | * This looks strange, since the commands are | |
825 | * now part of no list, but the next error | |
826 | * action will be ata_port_error_handler() | |
827 | * which takes no list and sweeps them up | |
828 | * anyway from the ata tag array. | |
829 | */ | |
830 | while (!list_empty(&sata_q)) | |
831 | list_del_init(sata_q.next); | |
00dd4998 | 832 | } |
d214d81e | 833 | } while (eh_dev); |
00dd4998 | 834 | } |
b52df417 DW |
835 | |
836 | void sas_ata_schedule_reset(struct domain_device *dev) | |
837 | { | |
838 | struct ata_eh_info *ehi; | |
839 | struct ata_port *ap; | |
840 | unsigned long flags; | |
841 | ||
842 | if (!dev_is_sata(dev)) | |
843 | return; | |
844 | ||
845 | ap = dev->sata_dev.ap; | |
846 | ehi = &ap->link.eh_info; | |
847 | ||
848 | spin_lock_irqsave(ap->lock, flags); | |
849 | ehi->err_mask |= AC_ERR_TIMEOUT; | |
850 | ehi->action |= ATA_EH_RESET; | |
851 | ata_port_schedule_eh(ap); | |
852 | spin_unlock_irqrestore(ap->lock, flags); | |
853 | } | |
43a5ab15 | 854 | EXPORT_SYMBOL_GPL(sas_ata_schedule_reset); |
81c757bc DW |
855 | |
856 | void sas_ata_wait_eh(struct domain_device *dev) | |
857 | { | |
858 | struct ata_port *ap; | |
859 | ||
860 | if (!dev_is_sata(dev)) | |
861 | return; | |
862 | ||
863 | ap = dev->sata_dev.ap; | |
864 | ata_port_wait_eh(ap); | |
865 | } |