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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> |
b9142174 | 26 | |
338ec570 DW |
27 | #include <scsi/sas_ata.h> |
28 | #include "sas_internal.h" | |
29 | #include <scsi/scsi_host.h> | |
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_tcq.h> | |
32 | #include <scsi/scsi.h> | |
33 | #include <scsi/scsi_transport.h> | |
34 | #include <scsi/scsi_transport_sas.h> | |
35 | #include "../scsi_sas_internal.h" | |
3a2755af DW |
36 | #include "../scsi_transport_api.h" |
37 | #include <scsi/scsi_eh.h> | |
338ec570 DW |
38 | |
39 | static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) | |
40 | { | |
41 | /* Cheesy attempt to translate SAS errors into ATA. Hah! */ | |
42 | ||
43 | /* transport error */ | |
44 | if (ts->resp == SAS_TASK_UNDELIVERED) | |
45 | return AC_ERR_ATA_BUS; | |
46 | ||
47 | /* ts->resp == SAS_TASK_COMPLETE */ | |
48 | /* task delivered, what happened afterwards? */ | |
49 | switch (ts->stat) { | |
50 | case SAS_DEV_NO_RESPONSE: | |
51 | return AC_ERR_TIMEOUT; | |
52 | ||
53 | case SAS_INTERRUPTED: | |
54 | case SAS_PHY_DOWN: | |
55 | case SAS_NAK_R_ERR: | |
56 | return AC_ERR_ATA_BUS; | |
57 | ||
58 | ||
59 | case SAS_DATA_UNDERRUN: | |
60 | /* | |
61 | * Some programs that use the taskfile interface | |
62 | * (smartctl in particular) can cause underrun | |
63 | * problems. Ignore these errors, perhaps at our | |
64 | * peril. | |
65 | */ | |
66 | return 0; | |
67 | ||
68 | case SAS_DATA_OVERRUN: | |
69 | case SAS_QUEUE_FULL: | |
70 | case SAS_DEVICE_UNKNOWN: | |
71 | case SAS_SG_ERR: | |
72 | return AC_ERR_INVALID; | |
73 | ||
338ec570 DW |
74 | case SAS_OPEN_TO: |
75 | case SAS_OPEN_REJECT: | |
76 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", | |
cadbd4a5 | 77 | __func__, ts->stat); |
338ec570 DW |
78 | return AC_ERR_OTHER; |
79 | ||
75c0b386 | 80 | case SAM_STAT_CHECK_CONDITION: |
338ec570 DW |
81 | case SAS_ABORTED_TASK: |
82 | return AC_ERR_DEV; | |
83 | ||
84 | case SAS_PROTO_RESPONSE: | |
85 | /* This means the ending_fis has the error | |
86 | * value; return 0 here to collect it */ | |
87 | return 0; | |
88 | default: | |
89 | return 0; | |
90 | } | |
91 | } | |
92 | ||
93 | static void sas_ata_task_done(struct sas_task *task) | |
94 | { | |
95 | struct ata_queued_cmd *qc = task->uldd_task; | |
1c50dc83 | 96 | struct domain_device *dev; |
338ec570 DW |
97 | struct task_status_struct *stat = &task->task_status; |
98 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; | |
3a2755af | 99 | struct sas_ha_struct *sas_ha; |
338ec570 | 100 | enum ata_completion_errors ac; |
3eb7a51a | 101 | unsigned long flags; |
338ec570 | 102 | |
1c50dc83 DW |
103 | if (!qc) |
104 | goto qc_already_gone; | |
105 | ||
106 | dev = qc->ap->private_data; | |
3a2755af | 107 | sas_ha = dev->port->ha; |
1c50dc83 | 108 | |
3eb7a51a | 109 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); |
75c0b386 JB |
110 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD || |
111 | ((stat->stat == SAM_STAT_CHECK_CONDITION && | |
112 | dev->sata_dev.command_set == ATAPI_COMMAND_SET))) { | |
338ec570 DW |
113 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
114 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); | |
115 | dev->sata_dev.sstatus = resp->sstatus; | |
116 | dev->sata_dev.serror = resp->serror; | |
117 | dev->sata_dev.scontrol = resp->scontrol; | |
75c0b386 | 118 | } else { |
338ec570 DW |
119 | ac = sas_to_ata_err(stat); |
120 | if (ac) { | |
cadbd4a5 | 121 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
338ec570 DW |
122 | stat->stat); |
123 | /* We saw a SAS error. Send a vague error. */ | |
124 | qc->err_mask = ac; | |
125 | dev->sata_dev.tf.feature = 0x04; /* status err */ | |
126 | dev->sata_dev.tf.command = ATA_ERR; | |
127 | } | |
128 | } | |
129 | ||
1c50dc83 | 130 | qc->lldd_task = NULL; |
fe059f12 DW |
131 | if (qc->scsicmd) |
132 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 133 | ata_qc_complete(qc); |
3eb7a51a DW |
134 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
135 | ||
3a2755af DW |
136 | /* |
137 | * If the sas_task has an ata qc, a scsi_cmnd and the aborted | |
138 | * flag is set, then we must have come in via the libsas EH | |
139 | * functions. When we exit this function, we need to put the | |
140 | * scsi_cmnd on the list of finished errors. The ata_qc_complete | |
141 | * call cleans up the libata side of things but we're protected | |
142 | * from the scsi_cmnd going away because the scsi_cmnd is owned | |
143 | * by the EH, making libata's call to scsi_done a NOP. | |
144 | */ | |
145 | spin_lock_irqsave(&task->task_state_lock, flags); | |
146 | if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED) | |
147 | scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q); | |
148 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
149 | ||
1c50dc83 | 150 | qc_already_gone: |
338ec570 DW |
151 | list_del_init(&task->list); |
152 | sas_free_task(task); | |
153 | } | |
154 | ||
155 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) | |
156 | { | |
35a7f2f6 | 157 | int res; |
338ec570 DW |
158 | struct sas_task *task; |
159 | struct domain_device *dev = qc->ap->private_data; | |
160 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
161 | struct Scsi_Host *host = sas_ha->core.shost; | |
162 | struct sas_internal *i = to_sas_internal(host->transportt); | |
163 | struct scatterlist *sg; | |
338ec570 | 164 | unsigned int xfer = 0; |
ff2aeb1e | 165 | unsigned int si; |
338ec570 | 166 | |
56dd2c06 DW |
167 | /* If the device fell off, no sense in issuing commands */ |
168 | if (dev->gone) | |
169 | return AC_ERR_SYSTEM; | |
170 | ||
338ec570 DW |
171 | task = sas_alloc_task(GFP_ATOMIC); |
172 | if (!task) | |
35a7f2f6 | 173 | return AC_ERR_SYSTEM; |
338ec570 DW |
174 | task->dev = dev; |
175 | task->task_proto = SAS_PROTOCOL_STP; | |
176 | task->task_done = sas_ata_task_done; | |
177 | ||
178 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || | |
179 | qc->tf.command == ATA_CMD_FPDMA_READ) { | |
180 | /* Need to zero out the tag libata assigned us */ | |
181 | qc->tf.nsect = 0; | |
182 | } | |
183 | ||
110dd8f1 | 184 | ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis); |
338ec570 | 185 | task->uldd_task = qc; |
405e66b3 | 186 | if (ata_is_atapi(qc->tf.protocol)) { |
338ec570 | 187 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
dde20207 JB |
188 | task->total_xfer_len = qc->nbytes; |
189 | task->num_scatter = qc->n_elem; | |
338ec570 | 190 | } else { |
ff2aeb1e | 191 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
338ec570 | 192 | xfer += sg->length; |
338ec570 DW |
193 | |
194 | task->total_xfer_len = xfer; | |
ff2aeb1e | 195 | task->num_scatter = si; |
338ec570 DW |
196 | } |
197 | ||
198 | task->data_dir = qc->dma_dir; | |
ff2aeb1e | 199 | task->scatter = qc->sg; |
338ec570 DW |
200 | task->ata_task.retry_count = 1; |
201 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 202 | qc->lldd_task = task; |
338ec570 DW |
203 | |
204 | switch (qc->tf.protocol) { | |
205 | case ATA_PROT_NCQ: | |
206 | task->ata_task.use_ncq = 1; | |
207 | /* fall through */ | |
0dc36888 | 208 | case ATAPI_PROT_DMA: |
338ec570 DW |
209 | case ATA_PROT_DMA: |
210 | task->ata_task.dma_xfer = 1; | |
211 | break; | |
212 | } | |
213 | ||
fe059f12 DW |
214 | if (qc->scsicmd) |
215 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
216 | ||
338ec570 DW |
217 | if (sas_ha->lldd_max_execute_num < 2) |
218 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
219 | else | |
220 | res = sas_queue_up(task); | |
221 | ||
222 | /* Examine */ | |
223 | if (res) { | |
224 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
225 | ||
fe059f12 DW |
226 | if (qc->scsicmd) |
227 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 228 | sas_free_task(task); |
35a7f2f6 | 229 | return AC_ERR_SYSTEM; |
338ec570 DW |
230 | } |
231 | ||
35a7f2f6 | 232 | return 0; |
338ec570 DW |
233 | } |
234 | ||
4c9bf4e7 TH |
235 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
236 | { | |
237 | struct domain_device *dev = qc->ap->private_data; | |
238 | ||
239 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); | |
240 | return true; | |
241 | } | |
242 | ||
c299190b JB |
243 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
244 | unsigned long deadline) | |
338ec570 | 245 | { |
c299190b | 246 | struct ata_port *ap = link->ap; |
338ec570 DW |
247 | struct domain_device *dev = ap->private_data; |
248 | struct sas_internal *i = | |
249 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
a29c0515 | 250 | int res = TMF_RESP_FUNC_FAILED; |
c299190b | 251 | int ret = 0; |
338ec570 DW |
252 | |
253 | if (i->dft->lldd_I_T_nexus_reset) | |
254 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
255 | ||
c299190b | 256 | if (res != TMF_RESP_FUNC_COMPLETE) { |
cadbd4a5 | 257 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); |
c299190b JB |
258 | ret = -EAGAIN; |
259 | } | |
338ec570 DW |
260 | |
261 | switch (dev->sata_dev.command_set) { | |
262 | case ATA_COMMAND_SET: | |
cadbd4a5 | 263 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
c299190b | 264 | *class = ATA_DEV_ATA; |
338ec570 DW |
265 | break; |
266 | case ATAPI_COMMAND_SET: | |
cadbd4a5 | 267 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
c299190b | 268 | *class = ATA_DEV_ATAPI; |
338ec570 DW |
269 | break; |
270 | default: | |
271 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
cadbd4a5 | 272 | __func__, |
338ec570 | 273 | dev->sata_dev.command_set); |
c299190b | 274 | *class = ATA_DEV_UNKNOWN; |
338ec570 DW |
275 | break; |
276 | } | |
277 | ||
278 | ap->cbl = ATA_CBL_SATA; | |
c299190b | 279 | return ret; |
338ec570 DW |
280 | } |
281 | ||
282 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) | |
283 | { | |
284 | if (qc->flags & ATA_QCFLAG_FAILED) | |
285 | qc->err_mask |= AC_ERR_OTHER; | |
286 | ||
1c50dc83 DW |
287 | if (qc->err_mask) { |
288 | /* | |
289 | * Find the sas_task and kill it. By this point, | |
290 | * libata has decided to kill the qc, so we needn't | |
291 | * bother with sas_ata_task_done. But we still | |
292 | * ought to abort the task. | |
293 | */ | |
294 | struct sas_task *task = qc->lldd_task; | |
3a2755af | 295 | unsigned long flags; |
1c50dc83 DW |
296 | |
297 | qc->lldd_task = NULL; | |
298 | if (task) { | |
3a2755af DW |
299 | /* Should this be a AT(API) device reset? */ |
300 | spin_lock_irqsave(&task->task_state_lock, flags); | |
301 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
302 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
303 | ||
1c50dc83 DW |
304 | task->uldd_task = NULL; |
305 | __sas_task_abort(task); | |
306 | } | |
1c50dc83 | 307 | } |
338ec570 DW |
308 | } |
309 | ||
338ec570 | 310 | static struct ata_port_operations sas_sata_ops = { |
c299190b JB |
311 | .prereset = ata_std_prereset, |
312 | .softreset = NULL, | |
313 | .hardreset = sas_ata_hard_reset, | |
314 | .postreset = ata_std_postreset, | |
315 | .error_handler = ata_std_error_handler, | |
338ec570 | 316 | .post_internal_cmd = sas_ata_post_internal, |
f0ad30d3 | 317 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
318 | .qc_prep = ata_noop_qc_prep, |
319 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 320 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
321 | .port_start = ata_sas_port_start, |
322 | .port_stop = ata_sas_port_stop, | |
338ec570 DW |
323 | }; |
324 | ||
325 | static struct ata_port_info sata_port_info = { | |
326 | .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | | |
327 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, | |
328 | .pio_mask = 0x1f, /* PIO0-4 */ | |
329 | .mwdma_mask = 0x07, /* MWDMA0-2 */ | |
330 | .udma_mask = ATA_UDMA6, | |
331 | .port_ops = &sas_sata_ops | |
332 | }; | |
333 | ||
334 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
335 | struct scsi_target *starget) | |
336 | { | |
337 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
338 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
339 | struct ata_port *ap; | |
340 | ||
341 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 342 | ha->dev, |
338ec570 DW |
343 | sata_port_info.flags, |
344 | &sas_sata_ops); | |
345 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
346 | &sata_port_info, | |
347 | shost); | |
348 | if (!ap) { | |
349 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
350 | return -ENODEV; | |
351 | } | |
352 | ||
353 | ap->private_data = found_dev; | |
354 | ap->cbl = ATA_CBL_SATA; | |
355 | ap->scsi_host = shost; | |
356 | found_dev->sata_dev.ap = ap; | |
357 | ||
358 | return 0; | |
359 | } | |
3a2755af DW |
360 | |
361 | void sas_ata_task_abort(struct sas_task *task) | |
362 | { | |
363 | struct ata_queued_cmd *qc = task->uldd_task; | |
364 | struct completion *waiting; | |
365 | ||
366 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
367 | if (qc->scsicmd) { | |
1b4d0d8e JB |
368 | struct request_queue *q = qc->scsicmd->device->request_queue; |
369 | unsigned long flags; | |
370 | ||
70b25f89 | 371 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 372 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 373 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
374 | scsi_schedule_eh(qc->scsicmd->device->host); |
375 | return; | |
376 | } | |
377 | ||
378 | /* Internal command, fake a timeout and complete. */ | |
379 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
380 | qc->flags |= ATA_QCFLAG_FAILED; | |
381 | qc->err_mask |= AC_ERR_TIMEOUT; | |
382 | waiting = qc->private_data; | |
383 | complete(waiting); | |
384 | } | |
b9142174 JB |
385 | |
386 | static void sas_task_timedout(unsigned long _task) | |
387 | { | |
388 | struct sas_task *task = (void *) _task; | |
389 | unsigned long flags; | |
390 | ||
391 | spin_lock_irqsave(&task->task_state_lock, flags); | |
392 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
393 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
394 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
395 | ||
396 | complete(&task->completion); | |
397 | } | |
398 | ||
399 | static void sas_disc_task_done(struct sas_task *task) | |
400 | { | |
401 | if (!del_timer(&task->timer)) | |
402 | return; | |
403 | complete(&task->completion); | |
404 | } | |
405 | ||
406 | #define SAS_DEV_TIMEOUT 10 | |
407 | ||
408 | /** | |
409 | * sas_execute_task -- Basic task processing for discovery | |
410 | * @task: the task to be executed | |
411 | * @buffer: pointer to buffer to do I/O | |
412 | * @size: size of @buffer | |
1d1bbee6 | 413 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
414 | */ |
415 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, | |
1d1bbee6 | 416 | enum dma_data_direction dma_dir) |
b9142174 JB |
417 | { |
418 | int res = 0; | |
419 | struct scatterlist *scatter = NULL; | |
420 | struct task_status_struct *ts = &task->task_status; | |
421 | int num_scatter = 0; | |
422 | int retries = 0; | |
423 | struct sas_internal *i = | |
424 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
425 | ||
1d1bbee6 | 426 | if (dma_dir != DMA_NONE) { |
b9142174 JB |
427 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
428 | if (!scatter) | |
429 | goto out; | |
430 | ||
431 | sg_init_one(scatter, buffer, size); | |
432 | num_scatter = 1; | |
433 | } | |
434 | ||
435 | task->task_proto = task->dev->tproto; | |
436 | task->scatter = scatter; | |
437 | task->num_scatter = num_scatter; | |
438 | task->total_xfer_len = size; | |
1d1bbee6 | 439 | task->data_dir = dma_dir; |
b9142174 | 440 | task->task_done = sas_disc_task_done; |
1d1bbee6 | 441 | if (dma_dir != DMA_NONE && |
b9142174 | 442 | sas_protocol_ata(task->task_proto)) { |
1d1bbee6 | 443 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
b9142174 JB |
444 | task->scatter, |
445 | task->num_scatter, | |
446 | task->data_dir); | |
447 | } | |
448 | ||
449 | for (retries = 0; retries < 5; retries++) { | |
450 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
451 | init_completion(&task->completion); | |
452 | ||
453 | task->timer.data = (unsigned long) task; | |
454 | task->timer.function = sas_task_timedout; | |
455 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; | |
456 | add_timer(&task->timer); | |
457 | ||
458 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); | |
459 | if (res) { | |
460 | del_timer(&task->timer); | |
461 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", | |
462 | res); | |
463 | goto ex_err; | |
464 | } | |
465 | wait_for_completion(&task->completion); | |
32e8ae36 | 466 | res = -ECOMM; |
b9142174 JB |
467 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
468 | int res2; | |
469 | SAS_DPRINTK("task aborted, flags:0x%x\n", | |
470 | task->task_state_flags); | |
471 | res2 = i->dft->lldd_abort_task(task); | |
472 | SAS_DPRINTK("came back from abort task\n"); | |
473 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
474 | if (res2 == TMF_RESP_FUNC_COMPLETE) | |
475 | continue; /* Retry the task */ | |
476 | else | |
477 | goto ex_err; | |
478 | } | |
479 | } | |
df64d3ca JB |
480 | if (task->task_status.stat == SAM_STAT_BUSY || |
481 | task->task_status.stat == SAM_STAT_TASK_SET_FULL || | |
b9142174 JB |
482 | task->task_status.stat == SAS_QUEUE_FULL) { |
483 | SAS_DPRINTK("task: q busy, sleeping...\n"); | |
484 | schedule_timeout_interruptible(HZ); | |
df64d3ca | 485 | } else if (task->task_status.stat == SAM_STAT_CHECK_CONDITION) { |
b9142174 JB |
486 | struct scsi_sense_hdr shdr; |
487 | ||
488 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, | |
489 | &shdr)) { | |
490 | SAS_DPRINTK("couldn't normalize sense\n"); | |
491 | continue; | |
492 | } | |
493 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || | |
494 | (shdr.sense_key == 2 && shdr.asc == 4 && | |
495 | shdr.ascq == 1)) { | |
496 | SAS_DPRINTK("device %016llx LUN: %016llx " | |
497 | "powering up or not ready yet, " | |
498 | "sleeping...\n", | |
499 | SAS_ADDR(task->dev->sas_addr), | |
500 | SAS_ADDR(task->ssp_task.LUN)); | |
501 | ||
502 | schedule_timeout_interruptible(5*HZ); | |
503 | } else if (shdr.sense_key == 1) { | |
504 | res = 0; | |
505 | break; | |
506 | } else if (shdr.sense_key == 5) { | |
507 | break; | |
508 | } else { | |
509 | SAS_DPRINTK("dev %016llx LUN: %016llx " | |
510 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" | |
511 | "\n", | |
512 | SAS_ADDR(task->dev->sas_addr), | |
513 | SAS_ADDR(task->ssp_task.LUN), | |
514 | shdr.sense_key, | |
515 | shdr.asc, shdr.ascq); | |
516 | } | |
517 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || | |
df64d3ca | 518 | task->task_status.stat != SAM_STAT_GOOD) { |
b9142174 JB |
519 | SAS_DPRINTK("task finished with resp:0x%x, " |
520 | "stat:0x%x\n", | |
521 | task->task_status.resp, | |
522 | task->task_status.stat); | |
523 | goto ex_err; | |
524 | } else { | |
525 | res = 0; | |
526 | break; | |
527 | } | |
528 | } | |
529 | ex_err: | |
1d1bbee6 | 530 | if (dma_dir != DMA_NONE) { |
b9142174 | 531 | if (sas_protocol_ata(task->task_proto)) |
1d1bbee6 | 532 | dma_unmap_sg(task->dev->port->ha->dev, |
b9142174 JB |
533 | task->scatter, task->num_scatter, |
534 | task->data_dir); | |
535 | kfree(scatter); | |
536 | } | |
537 | out: | |
538 | return res; | |
539 | } | |
540 | ||
541 | /* ---------- SATA ---------- */ | |
542 | ||
543 | static void sas_get_ata_command_set(struct domain_device *dev) | |
544 | { | |
545 | struct dev_to_host_fis *fis = | |
546 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
547 | ||
548 | if ((fis->sector_count == 1 && /* ATA */ | |
549 | fis->lbal == 1 && | |
550 | fis->lbam == 0 && | |
551 | fis->lbah == 0 && | |
552 | fis->device == 0) | |
553 | || | |
554 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
555 | fis->lbal == 0 && | |
556 | fis->lbam == 0xCE && | |
557 | fis->lbah == 0xAA && | |
558 | (fis->device & ~0x10) == 0)) | |
559 | ||
560 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
561 | ||
562 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
563 | fis->lbal == 1 && | |
564 | fis->byte_count_low == 0x14 && | |
565 | fis->byte_count_high == 0xEB && | |
566 | (fis->device & ~0x10) == 0)) | |
567 | ||
568 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
569 | ||
570 | else if ((fis->sector_count == 1 && /* SEMB */ | |
571 | fis->lbal == 1 && | |
572 | fis->lbam == 0x3C && | |
573 | fis->lbah == 0xC3 && | |
574 | fis->device == 0) | |
575 | || | |
576 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
577 | fis->lbal == 1 && | |
578 | fis->byte_count_low == 0x69 && | |
579 | fis->byte_count_high == 0x96 && | |
580 | (fis->device & ~0x10) == 0)) | |
581 | ||
582 | /* Treat it as a superset? */ | |
583 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
584 | } | |
585 | ||
586 | /** | |
587 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery | |
588 | * @dev: the device to send the command to | |
589 | * @command: the command register | |
590 | * @features: the features register | |
591 | * @buffer: pointer to buffer to do I/O | |
592 | * @size: size of @buffer | |
1d1bbee6 | 593 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
594 | */ |
595 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, | |
596 | u8 features, void *buffer, int size, | |
1d1bbee6 | 597 | enum dma_data_direction dma_dir) |
b9142174 JB |
598 | { |
599 | int res = 0; | |
600 | struct sas_task *task; | |
601 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) | |
602 | &dev->frame_rcvd[0]; | |
603 | ||
604 | res = -ENOMEM; | |
605 | task = sas_alloc_task(GFP_KERNEL); | |
606 | if (!task) | |
607 | goto out; | |
608 | ||
609 | task->dev = dev; | |
610 | ||
611 | task->ata_task.fis.fis_type = 0x27; | |
612 | task->ata_task.fis.command = command; | |
613 | task->ata_task.fis.features = features; | |
614 | task->ata_task.fis.device = d2h_fis->device; | |
615 | task->ata_task.retry_count = 1; | |
616 | ||
1d1bbee6 | 617 | res = sas_execute_task(task, buffer, size, dma_dir); |
b9142174 JB |
618 | |
619 | sas_free_task(task); | |
620 | out: | |
621 | return res; | |
622 | } | |
623 | ||
b9142174 JB |
624 | #define ATA_IDENTIFY_DEV 0xEC |
625 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 | |
626 | #define ATA_SET_FEATURES 0xEF | |
627 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 | |
628 | ||
629 | /** | |
630 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) | |
631 | * @dev: STP/SATA device of interest (ATA/ATAPI) | |
632 | * | |
633 | * The LLDD has already been notified of this device, so that we can | |
634 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY | |
635 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its | |
636 | * performance for this device. | |
637 | */ | |
638 | static int sas_discover_sata_dev(struct domain_device *dev) | |
639 | { | |
640 | int res; | |
641 | __le16 *identify_x; | |
642 | u8 command; | |
643 | ||
644 | identify_x = kzalloc(512, GFP_KERNEL); | |
645 | if (!identify_x) | |
646 | return -ENOMEM; | |
647 | ||
648 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { | |
649 | dev->sata_dev.identify_device = identify_x; | |
650 | command = ATA_IDENTIFY_DEV; | |
651 | } else { | |
652 | dev->sata_dev.identify_packet_device = identify_x; | |
653 | command = ATA_IDENTIFY_PACKET_DEV; | |
654 | } | |
655 | ||
656 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 657 | DMA_FROM_DEVICE); |
b9142174 JB |
658 | if (res) |
659 | goto out_err; | |
660 | ||
661 | /* lives on the media? */ | |
662 | if (le16_to_cpu(identify_x[0]) & 4) { | |
663 | /* incomplete response */ | |
664 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " | |
665 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); | |
17b7a8de | 666 | if (!(identify_x[83] & cpu_to_le16(1<<6))) |
b9142174 JB |
667 | goto cont1; |
668 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, | |
669 | ATA_FEATURE_PUP_STBY_SPIN_UP, | |
1d1bbee6 | 670 | NULL, 0, DMA_NONE); |
b9142174 JB |
671 | if (res) |
672 | goto cont1; | |
673 | ||
674 | schedule_timeout_interruptible(5*HZ); /* More time? */ | |
675 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 676 | DMA_FROM_DEVICE); |
b9142174 JB |
677 | if (res) |
678 | goto out_err; | |
679 | } | |
680 | cont1: | |
b9142174 JB |
681 | /* XXX Hint: register this SATA device with SATL. |
682 | When this returns, dev->sata_dev->lu is alive and | |
683 | present. | |
684 | sas_satl_register_dev(dev); | |
685 | */ | |
686 | ||
687 | sas_fill_in_rphy(dev, dev->rphy); | |
688 | ||
689 | return 0; | |
690 | out_err: | |
691 | dev->sata_dev.identify_packet_device = NULL; | |
692 | dev->sata_dev.identify_device = NULL; | |
693 | kfree(identify_x); | |
694 | return res; | |
695 | } | |
696 | ||
697 | static int sas_discover_sata_pm(struct domain_device *dev) | |
698 | { | |
699 | return -ENODEV; | |
700 | } | |
701 | ||
702 | /** | |
703 | * sas_discover_sata -- discover an STP/SATA domain device | |
704 | * @dev: pointer to struct domain_device of interest | |
705 | * | |
706 | * First we notify the LLDD of this device, so we can send frames to | |
707 | * it. Then depending on the type of device we call the appropriate | |
708 | * discover functions. Once device discover is done, we notify the | |
709 | * LLDD so that it can fine-tune its parameters for the device, by | |
710 | * removing it and then adding it. That is, the second time around, | |
711 | * the driver would have certain fields, that it is looking at, set. | |
712 | * Finally we initialize the kobj so that the device can be added to | |
713 | * the system at registration time. Devices directly attached to a HA | |
714 | * port, have no parents. All other devices do, and should have their | |
715 | * "parent" pointer set appropriately before calling this function. | |
716 | */ | |
717 | int sas_discover_sata(struct domain_device *dev) | |
718 | { | |
719 | int res; | |
720 | ||
721 | sas_get_ata_command_set(dev); | |
722 | ||
723 | res = sas_notify_lldd_dev_found(dev); | |
724 | if (res) | |
725 | return res; | |
726 | ||
727 | switch (dev->dev_type) { | |
728 | case SATA_DEV: | |
729 | res = sas_discover_sata_dev(dev); | |
730 | break; | |
731 | case SATA_PM: | |
732 | res = sas_discover_sata_pm(dev); | |
733 | break; | |
734 | default: | |
735 | break; | |
736 | } | |
737 | sas_notify_lldd_dev_gone(dev); | |
738 | if (!res) { | |
739 | sas_notify_lldd_dev_found(dev); | |
740 | res = sas_rphy_add(dev->rphy); | |
741 | } | |
742 | ||
743 | return res; | |
744 | } | |
c299190b JB |
745 | |
746 | void sas_ata_strategy_handler(struct Scsi_Host *shost) | |
747 | { | |
748 | struct scsi_device *sdev; | |
749 | ||
750 | shost_for_each_device(sdev, shost) { | |
751 | struct domain_device *ddev = sdev_to_domain_dev(sdev); | |
752 | struct ata_port *ap = ddev->sata_dev.ap; | |
753 | ||
754 | if (!dev_is_sata(ddev)) | |
755 | continue; | |
756 | ||
757 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); | |
758 | ata_scsi_port_error_handler(shost, ap); | |
759 | } | |
760 | } | |
761 | ||
762 | int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, | |
763 | enum blk_eh_timer_return *rtn) | |
764 | { | |
765 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
766 | ||
767 | if (!dev_is_sata(ddev) || task) | |
768 | return 0; | |
769 | ||
770 | /* we're a sata device with no task, so this must be a libata | |
771 | * eh timeout. Ideally should hook into libata timeout | |
772 | * handling, but there's no point, it just wants to activate | |
773 | * the eh thread */ | |
774 | *rtn = BLK_EH_NOT_HANDLED; | |
775 | return 1; | |
776 | } | |
777 | ||
778 | int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, | |
779 | struct list_head *done_q) | |
780 | { | |
781 | int rtn = 0; | |
782 | struct scsi_cmnd *cmd, *n; | |
783 | struct ata_port *ap; | |
784 | ||
785 | do { | |
786 | LIST_HEAD(sata_q); | |
787 | ||
788 | ap = NULL; | |
789 | ||
790 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { | |
791 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
792 | ||
793 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) | |
794 | continue; | |
795 | if (ap && ap != ddev->sata_dev.ap) | |
796 | continue; | |
797 | ap = ddev->sata_dev.ap; | |
798 | rtn = 1; | |
799 | list_move(&cmd->eh_entry, &sata_q); | |
800 | } | |
801 | ||
802 | if (!list_empty(&sata_q)) { | |
803 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n"); | |
804 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); | |
805 | } | |
806 | } while (ap); | |
807 | ||
808 | return rtn; | |
809 | } |