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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 | ||
df64d3ca | 74 | case SAM_STAT_CHECK_CONDITION: |
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 | ||
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); |
df64d3ca | 110 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD) { |
338ec570 DW |
111 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
112 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); | |
113 | dev->sata_dev.sstatus = resp->sstatus; | |
114 | dev->sata_dev.serror = resp->serror; | |
115 | dev->sata_dev.scontrol = resp->scontrol; | |
338ec570 DW |
116 | } else if (stat->stat != SAM_STAT_GOOD) { |
117 | ac = sas_to_ata_err(stat); | |
118 | if (ac) { | |
cadbd4a5 | 119 | SAS_DPRINTK("%s: SAS error %x\n", __func__, |
338ec570 DW |
120 | stat->stat); |
121 | /* We saw a SAS error. Send a vague error. */ | |
122 | qc->err_mask = ac; | |
123 | dev->sata_dev.tf.feature = 0x04; /* status err */ | |
124 | dev->sata_dev.tf.command = ATA_ERR; | |
125 | } | |
126 | } | |
127 | ||
1c50dc83 | 128 | qc->lldd_task = NULL; |
fe059f12 DW |
129 | if (qc->scsicmd) |
130 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 131 | ata_qc_complete(qc); |
3eb7a51a DW |
132 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
133 | ||
3a2755af DW |
134 | /* |
135 | * If the sas_task has an ata qc, a scsi_cmnd and the aborted | |
136 | * flag is set, then we must have come in via the libsas EH | |
137 | * functions. When we exit this function, we need to put the | |
138 | * scsi_cmnd on the list of finished errors. The ata_qc_complete | |
139 | * call cleans up the libata side of things but we're protected | |
140 | * from the scsi_cmnd going away because the scsi_cmnd is owned | |
141 | * by the EH, making libata's call to scsi_done a NOP. | |
142 | */ | |
143 | spin_lock_irqsave(&task->task_state_lock, flags); | |
144 | if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED) | |
145 | scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q); | |
146 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
147 | ||
1c50dc83 | 148 | qc_already_gone: |
338ec570 DW |
149 | list_del_init(&task->list); |
150 | sas_free_task(task); | |
151 | } | |
152 | ||
153 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) | |
154 | { | |
35a7f2f6 | 155 | int res; |
338ec570 DW |
156 | struct sas_task *task; |
157 | struct domain_device *dev = qc->ap->private_data; | |
158 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
159 | struct Scsi_Host *host = sas_ha->core.shost; | |
160 | struct sas_internal *i = to_sas_internal(host->transportt); | |
161 | struct scatterlist *sg; | |
338ec570 | 162 | unsigned int xfer = 0; |
ff2aeb1e | 163 | unsigned int si; |
338ec570 | 164 | |
56dd2c06 DW |
165 | /* If the device fell off, no sense in issuing commands */ |
166 | if (dev->gone) | |
167 | return AC_ERR_SYSTEM; | |
168 | ||
338ec570 DW |
169 | task = sas_alloc_task(GFP_ATOMIC); |
170 | if (!task) | |
35a7f2f6 | 171 | return AC_ERR_SYSTEM; |
338ec570 DW |
172 | task->dev = dev; |
173 | task->task_proto = SAS_PROTOCOL_STP; | |
174 | task->task_done = sas_ata_task_done; | |
175 | ||
176 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || | |
177 | qc->tf.command == ATA_CMD_FPDMA_READ) { | |
178 | /* Need to zero out the tag libata assigned us */ | |
179 | qc->tf.nsect = 0; | |
180 | } | |
181 | ||
110dd8f1 | 182 | ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis); |
338ec570 | 183 | task->uldd_task = qc; |
405e66b3 | 184 | if (ata_is_atapi(qc->tf.protocol)) { |
338ec570 | 185 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
dde20207 JB |
186 | task->total_xfer_len = qc->nbytes; |
187 | task->num_scatter = qc->n_elem; | |
338ec570 | 188 | } else { |
ff2aeb1e | 189 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
338ec570 | 190 | xfer += sg->length; |
338ec570 DW |
191 | |
192 | task->total_xfer_len = xfer; | |
ff2aeb1e | 193 | task->num_scatter = si; |
338ec570 DW |
194 | } |
195 | ||
196 | task->data_dir = qc->dma_dir; | |
ff2aeb1e | 197 | task->scatter = qc->sg; |
338ec570 DW |
198 | task->ata_task.retry_count = 1; |
199 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 200 | qc->lldd_task = task; |
338ec570 DW |
201 | |
202 | switch (qc->tf.protocol) { | |
203 | case ATA_PROT_NCQ: | |
204 | task->ata_task.use_ncq = 1; | |
205 | /* fall through */ | |
0dc36888 | 206 | case ATAPI_PROT_DMA: |
338ec570 DW |
207 | case ATA_PROT_DMA: |
208 | task->ata_task.dma_xfer = 1; | |
209 | break; | |
210 | } | |
211 | ||
fe059f12 DW |
212 | if (qc->scsicmd) |
213 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
214 | ||
338ec570 DW |
215 | if (sas_ha->lldd_max_execute_num < 2) |
216 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
217 | else | |
218 | res = sas_queue_up(task); | |
219 | ||
220 | /* Examine */ | |
221 | if (res) { | |
222 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
223 | ||
fe059f12 DW |
224 | if (qc->scsicmd) |
225 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 226 | sas_free_task(task); |
35a7f2f6 | 227 | return AC_ERR_SYSTEM; |
338ec570 DW |
228 | } |
229 | ||
35a7f2f6 | 230 | return 0; |
338ec570 DW |
231 | } |
232 | ||
4c9bf4e7 TH |
233 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
234 | { | |
235 | struct domain_device *dev = qc->ap->private_data; | |
236 | ||
237 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); | |
238 | return true; | |
239 | } | |
240 | ||
00dd4998 JB |
241 | static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
242 | unsigned long deadline) | |
338ec570 | 243 | { |
00dd4998 | 244 | struct ata_port *ap = link->ap; |
338ec570 DW |
245 | struct domain_device *dev = ap->private_data; |
246 | struct sas_internal *i = | |
247 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
a29c0515 | 248 | int res = TMF_RESP_FUNC_FAILED; |
00dd4998 | 249 | int ret = 0; |
338ec570 DW |
250 | |
251 | if (i->dft->lldd_I_T_nexus_reset) | |
252 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
253 | ||
00dd4998 | 254 | if (res != TMF_RESP_FUNC_COMPLETE) { |
cadbd4a5 | 255 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); |
00dd4998 JB |
256 | ret = -EAGAIN; |
257 | } | |
338ec570 DW |
258 | |
259 | switch (dev->sata_dev.command_set) { | |
260 | case ATA_COMMAND_SET: | |
cadbd4a5 | 261 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
00dd4998 | 262 | *class = ATA_DEV_ATA; |
338ec570 DW |
263 | break; |
264 | case ATAPI_COMMAND_SET: | |
cadbd4a5 | 265 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
00dd4998 | 266 | *class = ATA_DEV_ATAPI; |
338ec570 DW |
267 | break; |
268 | default: | |
269 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
cadbd4a5 | 270 | __func__, |
338ec570 | 271 | dev->sata_dev.command_set); |
00dd4998 | 272 | *class = ATA_DEV_UNKNOWN; |
338ec570 DW |
273 | break; |
274 | } | |
275 | ||
276 | ap->cbl = ATA_CBL_SATA; | |
00dd4998 | 277 | return ret; |
338ec570 DW |
278 | } |
279 | ||
280 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) | |
281 | { | |
282 | if (qc->flags & ATA_QCFLAG_FAILED) | |
283 | qc->err_mask |= AC_ERR_OTHER; | |
284 | ||
1c50dc83 DW |
285 | if (qc->err_mask) { |
286 | /* | |
287 | * Find the sas_task and kill it. By this point, | |
288 | * libata has decided to kill the qc, so we needn't | |
289 | * bother with sas_ata_task_done. But we still | |
290 | * ought to abort the task. | |
291 | */ | |
292 | struct sas_task *task = qc->lldd_task; | |
3a2755af | 293 | unsigned long flags; |
1c50dc83 DW |
294 | |
295 | qc->lldd_task = NULL; | |
296 | if (task) { | |
3a2755af DW |
297 | /* Should this be a AT(API) device reset? */ |
298 | spin_lock_irqsave(&task->task_state_lock, flags); | |
299 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
300 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
301 | ||
1c50dc83 DW |
302 | task->uldd_task = NULL; |
303 | __sas_task_abort(task); | |
304 | } | |
1c50dc83 | 305 | } |
338ec570 DW |
306 | } |
307 | ||
82ef04fb | 308 | static int sas_ata_scr_write(struct ata_link *link, unsigned int sc_reg_in, |
338ec570 DW |
309 | u32 val) |
310 | { | |
82ef04fb | 311 | struct domain_device *dev = link->ap->private_data; |
338ec570 | 312 | |
cadbd4a5 | 313 | SAS_DPRINTK("STUB %s\n", __func__); |
338ec570 DW |
314 | switch (sc_reg_in) { |
315 | case SCR_STATUS: | |
316 | dev->sata_dev.sstatus = val; | |
317 | break; | |
318 | case SCR_CONTROL: | |
319 | dev->sata_dev.scontrol = val; | |
320 | break; | |
321 | case SCR_ERROR: | |
322 | dev->sata_dev.serror = val; | |
323 | break; | |
324 | case SCR_ACTIVE: | |
9af5c9c9 | 325 | dev->sata_dev.ap->link.sactive = val; |
338ec570 | 326 | break; |
110dd8f1 JB |
327 | default: |
328 | return -EINVAL; | |
338ec570 | 329 | } |
110dd8f1 | 330 | return 0; |
338ec570 DW |
331 | } |
332 | ||
82ef04fb | 333 | static int sas_ata_scr_read(struct ata_link *link, unsigned int sc_reg_in, |
110dd8f1 | 334 | u32 *val) |
338ec570 | 335 | { |
82ef04fb | 336 | struct domain_device *dev = link->ap->private_data; |
338ec570 | 337 | |
cadbd4a5 | 338 | SAS_DPRINTK("STUB %s\n", __func__); |
338ec570 DW |
339 | switch (sc_reg_in) { |
340 | case SCR_STATUS: | |
110dd8f1 JB |
341 | *val = dev->sata_dev.sstatus; |
342 | return 0; | |
338ec570 | 343 | case SCR_CONTROL: |
110dd8f1 JB |
344 | *val = dev->sata_dev.scontrol; |
345 | return 0; | |
338ec570 | 346 | case SCR_ERROR: |
110dd8f1 JB |
347 | *val = dev->sata_dev.serror; |
348 | return 0; | |
338ec570 | 349 | case SCR_ACTIVE: |
9af5c9c9 | 350 | *val = dev->sata_dev.ap->link.sactive; |
110dd8f1 | 351 | return 0; |
338ec570 | 352 | default: |
110dd8f1 | 353 | return -EINVAL; |
338ec570 DW |
354 | } |
355 | } | |
356 | ||
357 | static struct ata_port_operations sas_sata_ops = { | |
00dd4998 JB |
358 | .prereset = ata_std_prereset, |
359 | .softreset = NULL, | |
360 | .hardreset = sas_ata_hard_reset, | |
361 | .postreset = ata_std_postreset, | |
362 | .error_handler = ata_std_error_handler, | |
338ec570 | 363 | .post_internal_cmd = sas_ata_post_internal, |
f0ad30d3 | 364 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
365 | .qc_prep = ata_noop_qc_prep, |
366 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 367 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
368 | .port_start = ata_sas_port_start, |
369 | .port_stop = ata_sas_port_stop, | |
370 | .scr_read = sas_ata_scr_read, | |
371 | .scr_write = sas_ata_scr_write | |
372 | }; | |
373 | ||
374 | static struct ata_port_info sata_port_info = { | |
9cbe056f | 375 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, |
0f2e0330 SS |
376 | .pio_mask = ATA_PIO4, |
377 | .mwdma_mask = ATA_MWDMA2, | |
338ec570 DW |
378 | .udma_mask = ATA_UDMA6, |
379 | .port_ops = &sas_sata_ops | |
380 | }; | |
381 | ||
382 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
383 | struct scsi_target *starget) | |
384 | { | |
385 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
386 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
387 | struct ata_port *ap; | |
388 | ||
389 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 390 | ha->dev, |
338ec570 DW |
391 | sata_port_info.flags, |
392 | &sas_sata_ops); | |
393 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
394 | &sata_port_info, | |
395 | shost); | |
396 | if (!ap) { | |
397 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
398 | return -ENODEV; | |
399 | } | |
400 | ||
401 | ap->private_data = found_dev; | |
402 | ap->cbl = ATA_CBL_SATA; | |
403 | ap->scsi_host = shost; | |
404 | found_dev->sata_dev.ap = ap; | |
405 | ||
406 | return 0; | |
407 | } | |
3a2755af DW |
408 | |
409 | void sas_ata_task_abort(struct sas_task *task) | |
410 | { | |
411 | struct ata_queued_cmd *qc = task->uldd_task; | |
412 | struct completion *waiting; | |
413 | ||
414 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
415 | if (qc->scsicmd) { | |
1b4d0d8e JB |
416 | struct request_queue *q = qc->scsicmd->device->request_queue; |
417 | unsigned long flags; | |
418 | ||
70b25f89 | 419 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 420 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 421 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
422 | scsi_schedule_eh(qc->scsicmd->device->host); |
423 | return; | |
424 | } | |
425 | ||
426 | /* Internal command, fake a timeout and complete. */ | |
427 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
428 | qc->flags |= ATA_QCFLAG_FAILED; | |
429 | qc->err_mask |= AC_ERR_TIMEOUT; | |
430 | waiting = qc->private_data; | |
431 | complete(waiting); | |
432 | } | |
b9142174 JB |
433 | |
434 | static void sas_task_timedout(unsigned long _task) | |
435 | { | |
436 | struct sas_task *task = (void *) _task; | |
437 | unsigned long flags; | |
438 | ||
439 | spin_lock_irqsave(&task->task_state_lock, flags); | |
440 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
441 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
442 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
443 | ||
444 | complete(&task->completion); | |
445 | } | |
446 | ||
447 | static void sas_disc_task_done(struct sas_task *task) | |
448 | { | |
449 | if (!del_timer(&task->timer)) | |
450 | return; | |
451 | complete(&task->completion); | |
452 | } | |
453 | ||
454 | #define SAS_DEV_TIMEOUT 10 | |
455 | ||
456 | /** | |
457 | * sas_execute_task -- Basic task processing for discovery | |
458 | * @task: the task to be executed | |
459 | * @buffer: pointer to buffer to do I/O | |
460 | * @size: size of @buffer | |
1d1bbee6 | 461 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
462 | */ |
463 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, | |
1d1bbee6 | 464 | enum dma_data_direction dma_dir) |
b9142174 JB |
465 | { |
466 | int res = 0; | |
467 | struct scatterlist *scatter = NULL; | |
468 | struct task_status_struct *ts = &task->task_status; | |
469 | int num_scatter = 0; | |
470 | int retries = 0; | |
471 | struct sas_internal *i = | |
472 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
473 | ||
1d1bbee6 | 474 | if (dma_dir != DMA_NONE) { |
b9142174 JB |
475 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
476 | if (!scatter) | |
477 | goto out; | |
478 | ||
479 | sg_init_one(scatter, buffer, size); | |
480 | num_scatter = 1; | |
481 | } | |
482 | ||
483 | task->task_proto = task->dev->tproto; | |
484 | task->scatter = scatter; | |
485 | task->num_scatter = num_scatter; | |
486 | task->total_xfer_len = size; | |
1d1bbee6 | 487 | task->data_dir = dma_dir; |
b9142174 | 488 | task->task_done = sas_disc_task_done; |
1d1bbee6 | 489 | if (dma_dir != DMA_NONE && |
b9142174 | 490 | sas_protocol_ata(task->task_proto)) { |
1d1bbee6 | 491 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
b9142174 JB |
492 | task->scatter, |
493 | task->num_scatter, | |
494 | task->data_dir); | |
495 | } | |
496 | ||
497 | for (retries = 0; retries < 5; retries++) { | |
498 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
499 | init_completion(&task->completion); | |
500 | ||
501 | task->timer.data = (unsigned long) task; | |
502 | task->timer.function = sas_task_timedout; | |
503 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; | |
504 | add_timer(&task->timer); | |
505 | ||
506 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); | |
507 | if (res) { | |
508 | del_timer(&task->timer); | |
509 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", | |
510 | res); | |
511 | goto ex_err; | |
512 | } | |
513 | wait_for_completion(&task->completion); | |
32e8ae36 | 514 | res = -ECOMM; |
b9142174 JB |
515 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
516 | int res2; | |
517 | SAS_DPRINTK("task aborted, flags:0x%x\n", | |
518 | task->task_state_flags); | |
519 | res2 = i->dft->lldd_abort_task(task); | |
520 | SAS_DPRINTK("came back from abort task\n"); | |
521 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
522 | if (res2 == TMF_RESP_FUNC_COMPLETE) | |
523 | continue; /* Retry the task */ | |
524 | else | |
525 | goto ex_err; | |
526 | } | |
527 | } | |
df64d3ca JB |
528 | if (task->task_status.stat == SAM_STAT_BUSY || |
529 | task->task_status.stat == SAM_STAT_TASK_SET_FULL || | |
b9142174 JB |
530 | task->task_status.stat == SAS_QUEUE_FULL) { |
531 | SAS_DPRINTK("task: q busy, sleeping...\n"); | |
532 | schedule_timeout_interruptible(HZ); | |
df64d3ca | 533 | } else if (task->task_status.stat == SAM_STAT_CHECK_CONDITION) { |
b9142174 JB |
534 | struct scsi_sense_hdr shdr; |
535 | ||
536 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, | |
537 | &shdr)) { | |
538 | SAS_DPRINTK("couldn't normalize sense\n"); | |
539 | continue; | |
540 | } | |
541 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || | |
542 | (shdr.sense_key == 2 && shdr.asc == 4 && | |
543 | shdr.ascq == 1)) { | |
544 | SAS_DPRINTK("device %016llx LUN: %016llx " | |
545 | "powering up or not ready yet, " | |
546 | "sleeping...\n", | |
547 | SAS_ADDR(task->dev->sas_addr), | |
548 | SAS_ADDR(task->ssp_task.LUN)); | |
549 | ||
550 | schedule_timeout_interruptible(5*HZ); | |
551 | } else if (shdr.sense_key == 1) { | |
552 | res = 0; | |
553 | break; | |
554 | } else if (shdr.sense_key == 5) { | |
555 | break; | |
556 | } else { | |
557 | SAS_DPRINTK("dev %016llx LUN: %016llx " | |
558 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" | |
559 | "\n", | |
560 | SAS_ADDR(task->dev->sas_addr), | |
561 | SAS_ADDR(task->ssp_task.LUN), | |
562 | shdr.sense_key, | |
563 | shdr.asc, shdr.ascq); | |
564 | } | |
565 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || | |
df64d3ca | 566 | task->task_status.stat != SAM_STAT_GOOD) { |
b9142174 JB |
567 | SAS_DPRINTK("task finished with resp:0x%x, " |
568 | "stat:0x%x\n", | |
569 | task->task_status.resp, | |
570 | task->task_status.stat); | |
571 | goto ex_err; | |
572 | } else { | |
573 | res = 0; | |
574 | break; | |
575 | } | |
576 | } | |
577 | ex_err: | |
1d1bbee6 | 578 | if (dma_dir != DMA_NONE) { |
b9142174 | 579 | if (sas_protocol_ata(task->task_proto)) |
1d1bbee6 | 580 | dma_unmap_sg(task->dev->port->ha->dev, |
b9142174 JB |
581 | task->scatter, task->num_scatter, |
582 | task->data_dir); | |
583 | kfree(scatter); | |
584 | } | |
585 | out: | |
586 | return res; | |
587 | } | |
588 | ||
589 | /* ---------- SATA ---------- */ | |
590 | ||
591 | static void sas_get_ata_command_set(struct domain_device *dev) | |
592 | { | |
593 | struct dev_to_host_fis *fis = | |
594 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
595 | ||
596 | if ((fis->sector_count == 1 && /* ATA */ | |
597 | fis->lbal == 1 && | |
598 | fis->lbam == 0 && | |
599 | fis->lbah == 0 && | |
600 | fis->device == 0) | |
601 | || | |
602 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
603 | fis->lbal == 0 && | |
604 | fis->lbam == 0xCE && | |
605 | fis->lbah == 0xAA && | |
606 | (fis->device & ~0x10) == 0)) | |
607 | ||
608 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
609 | ||
610 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
611 | fis->lbal == 1 && | |
612 | fis->byte_count_low == 0x14 && | |
613 | fis->byte_count_high == 0xEB && | |
614 | (fis->device & ~0x10) == 0)) | |
615 | ||
616 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
617 | ||
618 | else if ((fis->sector_count == 1 && /* SEMB */ | |
619 | fis->lbal == 1 && | |
620 | fis->lbam == 0x3C && | |
621 | fis->lbah == 0xC3 && | |
622 | fis->device == 0) | |
623 | || | |
624 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
625 | fis->lbal == 1 && | |
626 | fis->byte_count_low == 0x69 && | |
627 | fis->byte_count_high == 0x96 && | |
628 | (fis->device & ~0x10) == 0)) | |
629 | ||
630 | /* Treat it as a superset? */ | |
631 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
632 | } | |
633 | ||
634 | /** | |
635 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery | |
636 | * @dev: the device to send the command to | |
637 | * @command: the command register | |
638 | * @features: the features register | |
639 | * @buffer: pointer to buffer to do I/O | |
640 | * @size: size of @buffer | |
1d1bbee6 | 641 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
642 | */ |
643 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, | |
644 | u8 features, void *buffer, int size, | |
1d1bbee6 | 645 | enum dma_data_direction dma_dir) |
b9142174 JB |
646 | { |
647 | int res = 0; | |
648 | struct sas_task *task; | |
649 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) | |
650 | &dev->frame_rcvd[0]; | |
651 | ||
652 | res = -ENOMEM; | |
653 | task = sas_alloc_task(GFP_KERNEL); | |
654 | if (!task) | |
655 | goto out; | |
656 | ||
657 | task->dev = dev; | |
658 | ||
659 | task->ata_task.fis.fis_type = 0x27; | |
660 | task->ata_task.fis.command = command; | |
661 | task->ata_task.fis.features = features; | |
662 | task->ata_task.fis.device = d2h_fis->device; | |
663 | task->ata_task.retry_count = 1; | |
664 | ||
1d1bbee6 | 665 | res = sas_execute_task(task, buffer, size, dma_dir); |
b9142174 JB |
666 | |
667 | sas_free_task(task); | |
668 | out: | |
669 | return res; | |
670 | } | |
671 | ||
b9142174 JB |
672 | #define ATA_IDENTIFY_DEV 0xEC |
673 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 | |
674 | #define ATA_SET_FEATURES 0xEF | |
675 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 | |
676 | ||
677 | /** | |
678 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) | |
679 | * @dev: STP/SATA device of interest (ATA/ATAPI) | |
680 | * | |
681 | * The LLDD has already been notified of this device, so that we can | |
682 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY | |
683 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its | |
684 | * performance for this device. | |
685 | */ | |
686 | static int sas_discover_sata_dev(struct domain_device *dev) | |
687 | { | |
688 | int res; | |
689 | __le16 *identify_x; | |
690 | u8 command; | |
691 | ||
692 | identify_x = kzalloc(512, GFP_KERNEL); | |
693 | if (!identify_x) | |
694 | return -ENOMEM; | |
695 | ||
696 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { | |
697 | dev->sata_dev.identify_device = identify_x; | |
698 | command = ATA_IDENTIFY_DEV; | |
699 | } else { | |
700 | dev->sata_dev.identify_packet_device = identify_x; | |
701 | command = ATA_IDENTIFY_PACKET_DEV; | |
702 | } | |
703 | ||
704 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 705 | DMA_FROM_DEVICE); |
b9142174 JB |
706 | if (res) |
707 | goto out_err; | |
708 | ||
709 | /* lives on the media? */ | |
710 | if (le16_to_cpu(identify_x[0]) & 4) { | |
711 | /* incomplete response */ | |
712 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " | |
713 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); | |
17b7a8de | 714 | if (!(identify_x[83] & cpu_to_le16(1<<6))) |
b9142174 JB |
715 | goto cont1; |
716 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, | |
717 | ATA_FEATURE_PUP_STBY_SPIN_UP, | |
1d1bbee6 | 718 | NULL, 0, DMA_NONE); |
b9142174 JB |
719 | if (res) |
720 | goto cont1; | |
721 | ||
722 | schedule_timeout_interruptible(5*HZ); /* More time? */ | |
723 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 724 | DMA_FROM_DEVICE); |
b9142174 JB |
725 | if (res) |
726 | goto out_err; | |
727 | } | |
728 | cont1: | |
b9142174 JB |
729 | /* XXX Hint: register this SATA device with SATL. |
730 | When this returns, dev->sata_dev->lu is alive and | |
731 | present. | |
732 | sas_satl_register_dev(dev); | |
733 | */ | |
734 | ||
735 | sas_fill_in_rphy(dev, dev->rphy); | |
736 | ||
737 | return 0; | |
738 | out_err: | |
739 | dev->sata_dev.identify_packet_device = NULL; | |
740 | dev->sata_dev.identify_device = NULL; | |
741 | kfree(identify_x); | |
742 | return res; | |
743 | } | |
744 | ||
745 | static int sas_discover_sata_pm(struct domain_device *dev) | |
746 | { | |
747 | return -ENODEV; | |
748 | } | |
749 | ||
750 | /** | |
751 | * sas_discover_sata -- discover an STP/SATA domain device | |
752 | * @dev: pointer to struct domain_device of interest | |
753 | * | |
754 | * First we notify the LLDD of this device, so we can send frames to | |
755 | * it. Then depending on the type of device we call the appropriate | |
756 | * discover functions. Once device discover is done, we notify the | |
757 | * LLDD so that it can fine-tune its parameters for the device, by | |
758 | * removing it and then adding it. That is, the second time around, | |
759 | * the driver would have certain fields, that it is looking at, set. | |
760 | * Finally we initialize the kobj so that the device can be added to | |
761 | * the system at registration time. Devices directly attached to a HA | |
762 | * port, have no parents. All other devices do, and should have their | |
763 | * "parent" pointer set appropriately before calling this function. | |
764 | */ | |
765 | int sas_discover_sata(struct domain_device *dev) | |
766 | { | |
767 | int res; | |
768 | ||
769 | sas_get_ata_command_set(dev); | |
770 | ||
771 | res = sas_notify_lldd_dev_found(dev); | |
772 | if (res) | |
773 | return res; | |
774 | ||
775 | switch (dev->dev_type) { | |
776 | case SATA_DEV: | |
777 | res = sas_discover_sata_dev(dev); | |
778 | break; | |
779 | case SATA_PM: | |
780 | res = sas_discover_sata_pm(dev); | |
781 | break; | |
782 | default: | |
783 | break; | |
784 | } | |
785 | sas_notify_lldd_dev_gone(dev); | |
786 | if (!res) { | |
787 | sas_notify_lldd_dev_found(dev); | |
788 | res = sas_rphy_add(dev->rphy); | |
789 | } | |
790 | ||
791 | return res; | |
792 | } | |
00dd4998 JB |
793 | |
794 | void sas_ata_strategy_handler(struct Scsi_Host *shost) | |
795 | { | |
796 | struct scsi_device *sdev; | |
797 | ||
798 | shost_for_each_device(sdev, shost) { | |
799 | struct domain_device *ddev = sdev_to_domain_dev(sdev); | |
800 | struct ata_port *ap = ddev->sata_dev.ap; | |
801 | ||
802 | if (!dev_is_sata(ddev)) | |
803 | continue; | |
804 | ||
805 | ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); | |
806 | ata_scsi_port_error_handler(shost, ap); | |
807 | } | |
808 | } | |
809 | ||
810 | int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, | |
811 | enum blk_eh_timer_return *rtn) | |
812 | { | |
813 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
814 | ||
815 | if (!dev_is_sata(ddev) || task) | |
816 | return 0; | |
817 | ||
818 | /* we're a sata device with no task, so this must be a libata | |
819 | * eh timeout. Ideally should hook into libata timeout | |
820 | * handling, but there's no point, it just wants to activate | |
821 | * the eh thread */ | |
822 | *rtn = BLK_EH_NOT_HANDLED; | |
823 | return 1; | |
824 | } | |
825 | ||
826 | int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, | |
827 | struct list_head *done_q) | |
828 | { | |
829 | int rtn = 0; | |
830 | struct scsi_cmnd *cmd, *n; | |
831 | struct ata_port *ap; | |
832 | ||
833 | do { | |
834 | LIST_HEAD(sata_q); | |
835 | ||
836 | ap = NULL; | |
837 | ||
838 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { | |
839 | struct domain_device *ddev = cmd_to_domain_dev(cmd); | |
840 | ||
841 | if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) | |
842 | continue; | |
843 | if(ap && ap != ddev->sata_dev.ap) | |
844 | continue; | |
845 | ap = ddev->sata_dev.ap; | |
846 | rtn = 1; | |
847 | list_move(&cmd->eh_entry, &sata_q); | |
848 | } | |
849 | ||
850 | if (!list_empty(&sata_q)) { | |
851 | ata_port_printk(ap, KERN_DEBUG,"sas eh calling libata cmd error handler\n"); | |
852 | ata_scsi_cmd_error_handler(shost, ap, &sata_q); | |
853 | } | |
854 | } while (ap); | |
855 | ||
856 | return rtn; | |
857 | } |