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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> |
b9142174 | 27 | |
338ec570 DW |
28 | #include <scsi/sas_ata.h> |
29 | #include "sas_internal.h" | |
30 | #include <scsi/scsi_host.h> | |
31 | #include <scsi/scsi_device.h> | |
32 | #include <scsi/scsi_tcq.h> | |
33 | #include <scsi/scsi.h> | |
34 | #include <scsi/scsi_transport.h> | |
35 | #include <scsi/scsi_transport_sas.h> | |
36 | #include "../scsi_sas_internal.h" | |
3a2755af DW |
37 | #include "../scsi_transport_api.h" |
38 | #include <scsi/scsi_eh.h> | |
338ec570 DW |
39 | |
40 | static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) | |
41 | { | |
42 | /* Cheesy attempt to translate SAS errors into ATA. Hah! */ | |
43 | ||
44 | /* transport error */ | |
45 | if (ts->resp == SAS_TASK_UNDELIVERED) | |
46 | return AC_ERR_ATA_BUS; | |
47 | ||
48 | /* ts->resp == SAS_TASK_COMPLETE */ | |
49 | /* task delivered, what happened afterwards? */ | |
50 | switch (ts->stat) { | |
51 | case SAS_DEV_NO_RESPONSE: | |
52 | return AC_ERR_TIMEOUT; | |
53 | ||
54 | case SAS_INTERRUPTED: | |
55 | case SAS_PHY_DOWN: | |
56 | case SAS_NAK_R_ERR: | |
57 | return AC_ERR_ATA_BUS; | |
58 | ||
59 | ||
60 | case SAS_DATA_UNDERRUN: | |
61 | /* | |
62 | * Some programs that use the taskfile interface | |
63 | * (smartctl in particular) can cause underrun | |
64 | * problems. Ignore these errors, perhaps at our | |
65 | * peril. | |
66 | */ | |
67 | return 0; | |
68 | ||
69 | case SAS_DATA_OVERRUN: | |
70 | case SAS_QUEUE_FULL: | |
71 | case SAS_DEVICE_UNKNOWN: | |
72 | case SAS_SG_ERR: | |
73 | return AC_ERR_INVALID; | |
74 | ||
338ec570 DW |
75 | case SAS_OPEN_TO: |
76 | case SAS_OPEN_REJECT: | |
77 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", | |
cadbd4a5 | 78 | __func__, ts->stat); |
338ec570 DW |
79 | return AC_ERR_OTHER; |
80 | ||
75c0b386 | 81 | case SAM_STAT_CHECK_CONDITION: |
338ec570 DW |
82 | case SAS_ABORTED_TASK: |
83 | return AC_ERR_DEV; | |
84 | ||
85 | case SAS_PROTO_RESPONSE: | |
86 | /* This means the ending_fis has the error | |
87 | * value; return 0 here to collect it */ | |
88 | return 0; | |
89 | default: | |
90 | return 0; | |
91 | } | |
92 | } | |
93 | ||
94 | static void sas_ata_task_done(struct sas_task *task) | |
95 | { | |
96 | struct ata_queued_cmd *qc = task->uldd_task; | |
9095a64a | 97 | struct domain_device *dev = task->dev; |
338ec570 DW |
98 | struct task_status_struct *stat = &task->task_status; |
99 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; | |
9095a64a | 100 | struct sas_ha_struct *sas_ha = dev->port->ha; |
338ec570 | 101 | enum ata_completion_errors ac; |
3eb7a51a | 102 | unsigned long flags; |
bb650a1b | 103 | struct ata_link *link; |
3dff5721 | 104 | struct ata_port *ap; |
338ec570 | 105 | |
9095a64a DW |
106 | spin_lock_irqsave(&dev->done_lock, flags); |
107 | if (test_bit(SAS_HA_FROZEN, &sas_ha->state)) | |
108 | task = NULL; | |
109 | else if (qc && qc->scsicmd) | |
110 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
111 | spin_unlock_irqrestore(&dev->done_lock, flags); | |
112 | ||
113 | /* check if libsas-eh got to the task before us */ | |
114 | if (unlikely(!task)) | |
115 | return; | |
116 | ||
1c50dc83 DW |
117 | if (!qc) |
118 | goto qc_already_gone; | |
119 | ||
3dff5721 | 120 | ap = qc->ap; |
3dff5721 DW |
121 | link = &ap->link; |
122 | ||
123 | spin_lock_irqsave(ap->lock, flags); | |
124 | /* check if we lost the race with libata/sas_ata_post_internal() */ | |
125 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) { | |
126 | spin_unlock_irqrestore(ap->lock, flags); | |
127 | if (qc->scsicmd) | |
128 | goto qc_already_gone; | |
129 | else { | |
130 | /* if eh is not involved and the port is frozen then the | |
131 | * ata internal abort process has taken responsibility | |
132 | * for this sas_task | |
133 | */ | |
134 | return; | |
135 | } | |
136 | } | |
1c50dc83 | 137 | |
75c0b386 JB |
138 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD || |
139 | ((stat->stat == SAM_STAT_CHECK_CONDITION && | |
140 | dev->sata_dev.command_set == ATAPI_COMMAND_SET))) { | |
338ec570 | 141 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
bb650a1b XY |
142 | |
143 | if (!link->sactive) { | |
144 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); | |
145 | } else { | |
146 | link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command); | |
147 | if (unlikely(link->eh_info.err_mask)) | |
148 | qc->flags |= ATA_QCFLAG_FAILED; | |
149 | } | |
75c0b386 | 150 | } else { |
338ec570 DW |
151 | ac = sas_to_ata_err(stat); |
152 | if (ac) { | |
cadbd4a5 | 153 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
338ec570 DW |
154 | stat->stat); |
155 | /* We saw a SAS error. Send a vague error. */ | |
bb650a1b XY |
156 | if (!link->sactive) { |
157 | qc->err_mask = ac; | |
158 | } else { | |
159 | link->eh_info.err_mask |= AC_ERR_DEV; | |
160 | qc->flags |= ATA_QCFLAG_FAILED; | |
161 | } | |
162 | ||
338ec570 DW |
163 | dev->sata_dev.tf.feature = 0x04; /* status err */ |
164 | dev->sata_dev.tf.command = ATA_ERR; | |
165 | } | |
166 | } | |
167 | ||
1c50dc83 | 168 | qc->lldd_task = NULL; |
338ec570 | 169 | ata_qc_complete(qc); |
3dff5721 | 170 | spin_unlock_irqrestore(ap->lock, flags); |
3eb7a51a | 171 | |
1c50dc83 | 172 | qc_already_gone: |
338ec570 DW |
173 | list_del_init(&task->list); |
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 | ||
110dd8f1 | 213 | ata_tf_to_fis(&qc->tf, 1, 0, (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 | ||
338ec570 | 246 | if (sas_ha->lldd_max_execute_num < 2) |
312d3e56 | 247 | ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); |
338ec570 | 248 | else |
312d3e56 | 249 | ret = sas_queue_up(task); |
338ec570 DW |
250 | |
251 | /* Examine */ | |
312d3e56 DW |
252 | if (ret) { |
253 | SAS_DPRINTK("lldd_execute_task returned: %d\n", ret); | |
338ec570 | 254 | |
fe059f12 DW |
255 | if (qc->scsicmd) |
256 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 257 | sas_free_task(task); |
312d3e56 | 258 | ret = AC_ERR_SYSTEM; |
338ec570 DW |
259 | } |
260 | ||
312d3e56 DW |
261 | out: |
262 | spin_lock(ap->lock); | |
263 | local_irq_restore(flags); | |
264 | return ret; | |
338ec570 DW |
265 | } |
266 | ||
4c9bf4e7 TH |
267 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
268 | { | |
269 | struct domain_device *dev = qc->ap->private_data; | |
270 | ||
271 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); | |
272 | return true; | |
273 | } | |
274 | ||
00dd4998 JB |
275 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
276 | unsigned long deadline) | |
338ec570 | 277 | { |
00dd4998 | 278 | struct ata_port *ap = link->ap; |
338ec570 DW |
279 | struct domain_device *dev = ap->private_data; |
280 | struct sas_internal *i = | |
281 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
a29c0515 | 282 | int res = TMF_RESP_FUNC_FAILED; |
00dd4998 | 283 | int ret = 0; |
338ec570 DW |
284 | |
285 | if (i->dft->lldd_I_T_nexus_reset) | |
286 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
287 | ||
00dd4998 | 288 | if (res != TMF_RESP_FUNC_COMPLETE) { |
cadbd4a5 | 289 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); |
00dd4998 JB |
290 | ret = -EAGAIN; |
291 | } | |
338ec570 DW |
292 | |
293 | switch (dev->sata_dev.command_set) { | |
294 | case ATA_COMMAND_SET: | |
cadbd4a5 | 295 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
00dd4998 | 296 | *class = ATA_DEV_ATA; |
338ec570 DW |
297 | break; |
298 | case ATAPI_COMMAND_SET: | |
cadbd4a5 | 299 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
00dd4998 | 300 | *class = ATA_DEV_ATAPI; |
338ec570 DW |
301 | break; |
302 | default: | |
303 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
cadbd4a5 | 304 | __func__, |
338ec570 | 305 | dev->sata_dev.command_set); |
00dd4998 | 306 | *class = ATA_DEV_UNKNOWN; |
338ec570 DW |
307 | break; |
308 | } | |
309 | ||
310 | ap->cbl = ATA_CBL_SATA; | |
00dd4998 | 311 | return ret; |
338ec570 DW |
312 | } |
313 | ||
1ca1e43e DJ |
314 | static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, |
315 | unsigned long deadline) | |
316 | { | |
317 | struct ata_port *ap = link->ap; | |
318 | struct domain_device *dev = ap->private_data; | |
319 | struct sas_internal *i = | |
320 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
321 | int res = TMF_RESP_FUNC_FAILED; | |
322 | int ret = 0; | |
323 | ||
324 | if (i->dft->lldd_ata_soft_reset) | |
325 | res = i->dft->lldd_ata_soft_reset(dev); | |
326 | ||
327 | if (res != TMF_RESP_FUNC_COMPLETE) { | |
328 | SAS_DPRINTK("%s: Unable to soft reset\n", __func__); | |
329 | ret = -EAGAIN; | |
330 | } | |
331 | ||
332 | switch (dev->sata_dev.command_set) { | |
333 | case ATA_COMMAND_SET: | |
334 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); | |
335 | *class = ATA_DEV_ATA; | |
336 | break; | |
337 | case ATAPI_COMMAND_SET: | |
338 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); | |
339 | *class = ATA_DEV_ATAPI; | |
340 | break; | |
341 | default: | |
342 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
343 | __func__, dev->sata_dev.command_set); | |
344 | *class = ATA_DEV_UNKNOWN; | |
345 | break; | |
346 | } | |
347 | ||
348 | ap->cbl = ATA_CBL_SATA; | |
349 | return ret; | |
350 | } | |
351 | ||
3dff5721 DW |
352 | /* |
353 | * notify the lldd to forget the sas_task for this internal ata command | |
354 | * that bypasses scsi-eh | |
355 | */ | |
356 | static void sas_ata_internal_abort(struct sas_task *task) | |
357 | { | |
358 | struct sas_internal *si = | |
359 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
360 | unsigned long flags; | |
361 | int res; | |
362 | ||
363 | spin_lock_irqsave(&task->task_state_lock, flags); | |
364 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED || | |
365 | task->task_state_flags & SAS_TASK_STATE_DONE) { | |
366 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
367 | SAS_DPRINTK("%s: Task %p already finished.\n", __func__, | |
368 | task); | |
369 | goto out; | |
370 | } | |
371 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
372 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
373 | ||
374 | res = si->dft->lldd_abort_task(task); | |
375 | ||
376 | spin_lock_irqsave(&task->task_state_lock, flags); | |
377 | if (task->task_state_flags & SAS_TASK_STATE_DONE || | |
378 | res == TMF_RESP_FUNC_COMPLETE) { | |
379 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
380 | goto out; | |
381 | } | |
382 | ||
383 | /* XXX we are not prepared to deal with ->lldd_abort_task() | |
384 | * failures. TODO: lldds need to unconditionally forget about | |
385 | * aborted ata tasks, otherwise we (likely) leak the sas task | |
386 | * here | |
387 | */ | |
388 | SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task); | |
389 | ||
390 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
391 | task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; | |
392 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
393 | ||
394 | return; | |
395 | out: | |
396 | list_del_init(&task->list); | |
397 | sas_free_task(task); | |
398 | } | |
399 | ||
338ec570 DW |
400 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
401 | { | |
402 | if (qc->flags & ATA_QCFLAG_FAILED) | |
403 | qc->err_mask |= AC_ERR_OTHER; | |
404 | ||
1c50dc83 DW |
405 | if (qc->err_mask) { |
406 | /* | |
3dff5721 DW |
407 | * Find the sas_task and kill it. By this point, libata |
408 | * has decided to kill the qc and has frozen the port. | |
409 | * In this state sas_ata_task_done() will no longer free | |
410 | * the sas_task, so we need to notify the lldd (via | |
411 | * ->lldd_abort_task) that the task is dead and free it | |
412 | * ourselves. | |
1c50dc83 DW |
413 | */ |
414 | struct sas_task *task = qc->lldd_task; | |
1c50dc83 DW |
415 | |
416 | qc->lldd_task = NULL; | |
3a2cdf39 DW |
417 | if (!task) |
418 | return; | |
419 | task->uldd_task = NULL; | |
420 | sas_ata_internal_abort(task); | |
1c50dc83 | 421 | } |
338ec570 DW |
422 | } |
423 | ||
b91bb296 DW |
424 | |
425 | static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) | |
426 | { | |
427 | struct domain_device *dev = ap->private_data; | |
428 | struct sas_internal *i = | |
429 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
430 | ||
431 | if (i->dft->lldd_ata_set_dmamode) | |
432 | i->dft->lldd_ata_set_dmamode(dev); | |
433 | } | |
434 | ||
338ec570 | 435 | static struct ata_port_operations sas_sata_ops = { |
00dd4998 | 436 | .prereset = ata_std_prereset, |
1ca1e43e | 437 | .softreset = sas_ata_soft_reset, |
00dd4998 JB |
438 | .hardreset = sas_ata_hard_reset, |
439 | .postreset = ata_std_postreset, | |
440 | .error_handler = ata_std_error_handler, | |
338ec570 | 441 | .post_internal_cmd = sas_ata_post_internal, |
f0ad30d3 | 442 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
443 | .qc_prep = ata_noop_qc_prep, |
444 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 445 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
446 | .port_start = ata_sas_port_start, |
447 | .port_stop = ata_sas_port_stop, | |
b91bb296 | 448 | .set_dmamode = sas_ata_set_dmamode, |
338ec570 DW |
449 | }; |
450 | ||
451 | static struct ata_port_info sata_port_info = { | |
9cbe056f | 452 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, |
0f2e0330 SS |
453 | .pio_mask = ATA_PIO4, |
454 | .mwdma_mask = ATA_MWDMA2, | |
338ec570 DW |
455 | .udma_mask = ATA_UDMA6, |
456 | .port_ops = &sas_sata_ops | |
457 | }; | |
458 | ||
459 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
460 | struct scsi_target *starget) | |
461 | { | |
462 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
463 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
464 | struct ata_port *ap; | |
465 | ||
466 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 467 | ha->dev, |
338ec570 DW |
468 | sata_port_info.flags, |
469 | &sas_sata_ops); | |
470 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
471 | &sata_port_info, | |
472 | shost); | |
473 | if (!ap) { | |
474 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
475 | return -ENODEV; | |
476 | } | |
477 | ||
478 | ap->private_data = found_dev; | |
479 | ap->cbl = ATA_CBL_SATA; | |
480 | ap->scsi_host = shost; | |
481 | found_dev->sata_dev.ap = ap; | |
482 | ||
483 | return 0; | |
484 | } | |
3a2755af DW |
485 | |
486 | void sas_ata_task_abort(struct sas_task *task) | |
487 | { | |
488 | struct ata_queued_cmd *qc = task->uldd_task; | |
489 | struct completion *waiting; | |
490 | ||
491 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
492 | if (qc->scsicmd) { | |
1b4d0d8e JB |
493 | struct request_queue *q = qc->scsicmd->device->request_queue; |
494 | unsigned long flags; | |
495 | ||
70b25f89 | 496 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 497 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 498 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
499 | scsi_schedule_eh(qc->scsicmd->device->host); |
500 | return; | |
501 | } | |
502 | ||
503 | /* Internal command, fake a timeout and complete. */ | |
504 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
505 | qc->flags |= ATA_QCFLAG_FAILED; | |
506 | qc->err_mask |= AC_ERR_TIMEOUT; | |
507 | waiting = qc->private_data; | |
508 | complete(waiting); | |
509 | } | |
b9142174 | 510 | |
b9142174 JB |
511 | static void sas_get_ata_command_set(struct domain_device *dev) |
512 | { | |
513 | struct dev_to_host_fis *fis = | |
514 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
515 | ||
516 | if ((fis->sector_count == 1 && /* ATA */ | |
517 | fis->lbal == 1 && | |
518 | fis->lbam == 0 && | |
519 | fis->lbah == 0 && | |
520 | fis->device == 0) | |
521 | || | |
522 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
523 | fis->lbal == 0 && | |
524 | fis->lbam == 0xCE && | |
525 | fis->lbah == 0xAA && | |
526 | (fis->device & ~0x10) == 0)) | |
527 | ||
528 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
529 | ||
530 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
531 | fis->lbal == 1 && | |
532 | fis->byte_count_low == 0x14 && | |
533 | fis->byte_count_high == 0xEB && | |
534 | (fis->device & ~0x10) == 0)) | |
535 | ||
536 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
537 | ||
538 | else if ((fis->sector_count == 1 && /* SEMB */ | |
539 | fis->lbal == 1 && | |
540 | fis->lbam == 0x3C && | |
541 | fis->lbah == 0xC3 && | |
542 | fis->device == 0) | |
543 | || | |
544 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
545 | fis->lbal == 1 && | |
546 | fis->byte_count_low == 0x69 && | |
547 | fis->byte_count_high == 0x96 && | |
548 | (fis->device & ~0x10) == 0)) | |
549 | ||
550 | /* Treat it as a superset? */ | |
551 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
552 | } | |
553 | ||
87c8331f DW |
554 | void sas_probe_sata(struct work_struct *work) |
555 | { | |
556 | struct domain_device *dev, *n; | |
557 | struct sas_discovery_event *ev = | |
558 | container_of(work, struct sas_discovery_event, work); | |
559 | struct asd_sas_port *port = ev->port; | |
560 | ||
561 | clear_bit(DISCE_PROBE, &port->disc.pending); | |
562 | ||
563 | list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { | |
564 | int err; | |
565 | ||
566 | spin_lock_irq(&port->dev_list_lock); | |
567 | list_add_tail(&dev->dev_list_node, &port->dev_list); | |
568 | spin_unlock_irq(&port->dev_list_lock); | |
569 | ||
570 | err = sas_rphy_add(dev->rphy); | |
571 | ||
572 | if (err) { | |
573 | SAS_DPRINTK("%s: for %s device %16llx returned %d\n", | |
574 | __func__, dev->parent ? "exp-attached" : | |
575 | "direct-attached", | |
576 | SAS_ADDR(dev->sas_addr), err); | |
577 | sas_unregister_dev(port, dev); | |
578 | } else | |
579 | list_del_init(&dev->disco_list_node); | |
580 | } | |
581 | } | |
582 | ||
b9142174 JB |
583 | /** |
584 | * sas_discover_sata -- discover an STP/SATA domain device | |
585 | * @dev: pointer to struct domain_device of interest | |
586 | * | |
b91bb296 DW |
587 | * Devices directly attached to a HA port, have no parents. All other |
588 | * devices do, and should have their "parent" pointer set appropriately | |
589 | * before calling this function. | |
b9142174 JB |
590 | */ |
591 | int sas_discover_sata(struct domain_device *dev) | |
592 | { | |
593 | int res; | |
594 | ||
b91bb296 DW |
595 | if (dev->dev_type == SATA_PM) |
596 | return -ENODEV; | |
87c8331f | 597 | |
b91bb296 DW |
598 | sas_get_ata_command_set(dev); |
599 | sas_fill_in_rphy(dev, dev->rphy); | |
87c8331f DW |
600 | |
601 | res = sas_notify_lldd_dev_found(dev); | |
602 | if (res) | |
603 | return res; | |
604 | ||
605 | sas_discover_event(dev->port, DISCE_PROBE); | |
b91bb296 | 606 | return 0; |
b9142174 | 607 | } |
00dd4998 | 608 | |
50824d6c DW |
609 | static void async_sas_ata_eh(void *data, async_cookie_t cookie) |
610 | { | |
611 | struct domain_device *dev = data; | |
612 | struct ata_port *ap = dev->sata_dev.ap; | |
613 | struct sas_ha_struct *ha = dev->port->ha; | |
614 | ||
615 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); | |
616 | ata_scsi_port_error_handler(ha->core.shost, ap); | |
617 | } | |
618 | ||
00dd4998 JB |
619 | void sas_ata_strategy_handler(struct Scsi_Host *shost) |
620 | { | |
621 | struct scsi_device *sdev; | |
87c8331f | 622 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); |
50824d6c | 623 | LIST_HEAD(async); |
87c8331f DW |
624 | |
625 | /* it's ok to defer revalidation events during ata eh, these | |
626 | * disks are in one of three states: | |
627 | * 1/ present for initial domain discovery, and these | |
628 | * resets will cause bcn flutters | |
629 | * 2/ hot removed, we'll discover that after eh fails | |
630 | * 3/ hot added after initial discovery, lost the race, and need | |
631 | * to catch the next train. | |
632 | */ | |
633 | sas_disable_revalidation(sas_ha); | |
00dd4998 JB |
634 | |
635 | shost_for_each_device(sdev, shost) { | |
636 | struct domain_device *ddev = sdev_to_domain_dev(sdev); | |
00dd4998 JB |
637 | |
638 | if (!dev_is_sata(ddev)) | |
639 | continue; | |
c299190b | 640 | |
50824d6c | 641 | async_schedule_domain(async_sas_ata_eh, ddev, &async); |
00dd4998 | 642 | } |
50824d6c | 643 | async_synchronize_full_domain(&async); |
87c8331f DW |
644 | |
645 | sas_enable_revalidation(sas_ha); | |
00dd4998 JB |
646 | } |
647 | ||
00dd4998 JB |
648 | int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
649 | struct list_head *done_q) | |
650 | { | |
651 | int rtn = 0; | |
652 | struct scsi_cmnd *cmd, *n; | |
653 | struct ata_port *ap; | |
654 | ||
655 | do { | |
656 | LIST_HEAD(sata_q); | |
657 | ||
658 | ap = NULL; | |
c299190b | 659 | |
00dd4998 JB |
660 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
661 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
662 | ||
663 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) | |
664 | continue; | |
c299190b | 665 | if (ap && ap != ddev->sata_dev.ap) |
00dd4998 JB |
666 | continue; |
667 | ap = ddev->sata_dev.ap; | |
668 | rtn = 1; | |
669 | list_move(&cmd->eh_entry, &sata_q); | |
670 | } | |
671 | ||
672 | if (!list_empty(&sata_q)) { | |
c299190b | 673 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n"); |
00dd4998 | 674 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
a82058a7 JB |
675 | /* |
676 | * ata's error handler may leave the cmd on the list | |
677 | * so make sure they don't remain on a stack list | |
678 | * about to go out of scope. | |
679 | * | |
680 | * This looks strange, since the commands are | |
681 | * now part of no list, but the next error | |
682 | * action will be ata_port_error_handler() | |
683 | * which takes no list and sweeps them up | |
684 | * anyway from the ata tag array. | |
685 | */ | |
686 | while (!list_empty(&sata_q)) | |
687 | list_del_init(sata_q.next); | |
00dd4998 JB |
688 | } |
689 | } while (ap); | |
690 | ||
691 | return rtn; | |
692 | } | |
b52df417 DW |
693 | |
694 | void sas_ata_schedule_reset(struct domain_device *dev) | |
695 | { | |
696 | struct ata_eh_info *ehi; | |
697 | struct ata_port *ap; | |
698 | unsigned long flags; | |
699 | ||
700 | if (!dev_is_sata(dev)) | |
701 | return; | |
702 | ||
703 | ap = dev->sata_dev.ap; | |
704 | ehi = &ap->link.eh_info; | |
705 | ||
706 | spin_lock_irqsave(ap->lock, flags); | |
707 | ehi->err_mask |= AC_ERR_TIMEOUT; | |
708 | ehi->action |= ATA_EH_RESET; | |
709 | ata_port_schedule_eh(ap); | |
710 | spin_unlock_irqrestore(ap->lock, flags); | |
711 | } | |
81c757bc DW |
712 | |
713 | void sas_ata_wait_eh(struct domain_device *dev) | |
714 | { | |
715 | struct ata_port *ap; | |
716 | ||
717 | if (!dev_is_sata(dev)) | |
718 | return; | |
719 | ||
720 | ap = dev->sata_dev.ap; | |
721 | ata_port_wait_eh(ap); | |
722 | } |