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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 JB |
24 | #include <linux/scatterlist.h> |
25 | ||
338ec570 DW |
26 | #include <scsi/sas_ata.h> |
27 | #include "sas_internal.h" | |
28 | #include <scsi/scsi_host.h> | |
29 | #include <scsi/scsi_device.h> | |
30 | #include <scsi/scsi_tcq.h> | |
31 | #include <scsi/scsi.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_sas.h> | |
34 | #include "../scsi_sas_internal.h" | |
3a2755af DW |
35 | #include "../scsi_transport_api.h" |
36 | #include <scsi/scsi_eh.h> | |
338ec570 DW |
37 | |
38 | static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) | |
39 | { | |
40 | /* Cheesy attempt to translate SAS errors into ATA. Hah! */ | |
41 | ||
42 | /* transport error */ | |
43 | if (ts->resp == SAS_TASK_UNDELIVERED) | |
44 | return AC_ERR_ATA_BUS; | |
45 | ||
46 | /* ts->resp == SAS_TASK_COMPLETE */ | |
47 | /* task delivered, what happened afterwards? */ | |
48 | switch (ts->stat) { | |
49 | case SAS_DEV_NO_RESPONSE: | |
50 | return AC_ERR_TIMEOUT; | |
51 | ||
52 | case SAS_INTERRUPTED: | |
53 | case SAS_PHY_DOWN: | |
54 | case SAS_NAK_R_ERR: | |
55 | return AC_ERR_ATA_BUS; | |
56 | ||
57 | ||
58 | case SAS_DATA_UNDERRUN: | |
59 | /* | |
60 | * Some programs that use the taskfile interface | |
61 | * (smartctl in particular) can cause underrun | |
62 | * problems. Ignore these errors, perhaps at our | |
63 | * peril. | |
64 | */ | |
65 | return 0; | |
66 | ||
67 | case SAS_DATA_OVERRUN: | |
68 | case SAS_QUEUE_FULL: | |
69 | case SAS_DEVICE_UNKNOWN: | |
70 | case SAS_SG_ERR: | |
71 | return AC_ERR_INVALID; | |
72 | ||
73 | case SAM_CHECK_COND: | |
74 | case SAS_OPEN_TO: | |
75 | case SAS_OPEN_REJECT: | |
76 | SAS_DPRINTK("%s: Saw error %d. What to do?\n", | |
77 | __FUNCTION__, ts->stat); | |
78 | return AC_ERR_OTHER; | |
79 | ||
80 | case SAS_ABORTED_TASK: | |
81 | return AC_ERR_DEV; | |
82 | ||
83 | case SAS_PROTO_RESPONSE: | |
84 | /* This means the ending_fis has the error | |
85 | * value; return 0 here to collect it */ | |
86 | return 0; | |
87 | default: | |
88 | return 0; | |
89 | } | |
90 | } | |
91 | ||
92 | static void sas_ata_task_done(struct sas_task *task) | |
93 | { | |
94 | struct ata_queued_cmd *qc = task->uldd_task; | |
1c50dc83 | 95 | struct domain_device *dev; |
338ec570 DW |
96 | struct task_status_struct *stat = &task->task_status; |
97 | struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; | |
3a2755af | 98 | struct sas_ha_struct *sas_ha; |
338ec570 | 99 | enum ata_completion_errors ac; |
3eb7a51a | 100 | unsigned long flags; |
338ec570 | 101 | |
1c50dc83 DW |
102 | if (!qc) |
103 | goto qc_already_gone; | |
104 | ||
105 | dev = qc->ap->private_data; | |
3a2755af | 106 | sas_ha = dev->port->ha; |
1c50dc83 | 107 | |
3eb7a51a | 108 | spin_lock_irqsave(dev->sata_dev.ap->lock, flags); |
d97db63f | 109 | if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) { |
338ec570 DW |
110 | ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); |
111 | qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); | |
112 | dev->sata_dev.sstatus = resp->sstatus; | |
113 | dev->sata_dev.serror = resp->serror; | |
114 | dev->sata_dev.scontrol = resp->scontrol; | |
338ec570 DW |
115 | } else if (stat->stat != SAM_STAT_GOOD) { |
116 | ac = sas_to_ata_err(stat); | |
117 | if (ac) { | |
118 | SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__, | |
119 | stat->stat); | |
120 | /* We saw a SAS error. Send a vague error. */ | |
121 | qc->err_mask = ac; | |
122 | dev->sata_dev.tf.feature = 0x04; /* status err */ | |
123 | dev->sata_dev.tf.command = ATA_ERR; | |
124 | } | |
125 | } | |
126 | ||
1c50dc83 | 127 | qc->lldd_task = NULL; |
fe059f12 DW |
128 | if (qc->scsicmd) |
129 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 130 | ata_qc_complete(qc); |
3eb7a51a DW |
131 | spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); |
132 | ||
3a2755af DW |
133 | /* |
134 | * If the sas_task has an ata qc, a scsi_cmnd and the aborted | |
135 | * flag is set, then we must have come in via the libsas EH | |
136 | * functions. When we exit this function, we need to put the | |
137 | * scsi_cmnd on the list of finished errors. The ata_qc_complete | |
138 | * call cleans up the libata side of things but we're protected | |
139 | * from the scsi_cmnd going away because the scsi_cmnd is owned | |
140 | * by the EH, making libata's call to scsi_done a NOP. | |
141 | */ | |
142 | spin_lock_irqsave(&task->task_state_lock, flags); | |
143 | if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED) | |
144 | scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q); | |
145 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
146 | ||
1c50dc83 | 147 | qc_already_gone: |
338ec570 DW |
148 | list_del_init(&task->list); |
149 | sas_free_task(task); | |
150 | } | |
151 | ||
152 | static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) | |
153 | { | |
35a7f2f6 | 154 | int res; |
338ec570 DW |
155 | struct sas_task *task; |
156 | struct domain_device *dev = qc->ap->private_data; | |
157 | struct sas_ha_struct *sas_ha = dev->port->ha; | |
158 | struct Scsi_Host *host = sas_ha->core.shost; | |
159 | struct sas_internal *i = to_sas_internal(host->transportt); | |
160 | struct scatterlist *sg; | |
338ec570 | 161 | unsigned int xfer = 0; |
ff2aeb1e | 162 | unsigned int si; |
338ec570 DW |
163 | |
164 | task = sas_alloc_task(GFP_ATOMIC); | |
165 | if (!task) | |
35a7f2f6 | 166 | return AC_ERR_SYSTEM; |
338ec570 DW |
167 | task->dev = dev; |
168 | task->task_proto = SAS_PROTOCOL_STP; | |
169 | task->task_done = sas_ata_task_done; | |
170 | ||
171 | if (qc->tf.command == ATA_CMD_FPDMA_WRITE || | |
172 | qc->tf.command == ATA_CMD_FPDMA_READ) { | |
173 | /* Need to zero out the tag libata assigned us */ | |
174 | qc->tf.nsect = 0; | |
175 | } | |
176 | ||
110dd8f1 | 177 | ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis); |
338ec570 | 178 | task->uldd_task = qc; |
405e66b3 | 179 | if (ata_is_atapi(qc->tf.protocol)) { |
338ec570 | 180 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
dde20207 JB |
181 | task->total_xfer_len = qc->nbytes; |
182 | task->num_scatter = qc->n_elem; | |
338ec570 | 183 | } else { |
ff2aeb1e | 184 | for_each_sg(qc->sg, sg, qc->n_elem, si) |
338ec570 | 185 | xfer += sg->length; |
338ec570 DW |
186 | |
187 | task->total_xfer_len = xfer; | |
ff2aeb1e | 188 | task->num_scatter = si; |
338ec570 DW |
189 | } |
190 | ||
191 | task->data_dir = qc->dma_dir; | |
ff2aeb1e | 192 | task->scatter = qc->sg; |
338ec570 DW |
193 | task->ata_task.retry_count = 1; |
194 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 195 | qc->lldd_task = task; |
338ec570 DW |
196 | |
197 | switch (qc->tf.protocol) { | |
198 | case ATA_PROT_NCQ: | |
199 | task->ata_task.use_ncq = 1; | |
200 | /* fall through */ | |
0dc36888 | 201 | case ATAPI_PROT_DMA: |
338ec570 DW |
202 | case ATA_PROT_DMA: |
203 | task->ata_task.dma_xfer = 1; | |
204 | break; | |
205 | } | |
206 | ||
fe059f12 DW |
207 | if (qc->scsicmd) |
208 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
209 | ||
338ec570 DW |
210 | if (sas_ha->lldd_max_execute_num < 2) |
211 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
212 | else | |
213 | res = sas_queue_up(task); | |
214 | ||
215 | /* Examine */ | |
216 | if (res) { | |
217 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
218 | ||
fe059f12 DW |
219 | if (qc->scsicmd) |
220 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 221 | sas_free_task(task); |
35a7f2f6 | 222 | return AC_ERR_SYSTEM; |
338ec570 DW |
223 | } |
224 | ||
35a7f2f6 | 225 | return 0; |
338ec570 DW |
226 | } |
227 | ||
4c9bf4e7 TH |
228 | static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
229 | { | |
230 | struct domain_device *dev = qc->ap->private_data; | |
231 | ||
232 | memcpy(&qc->result_tf, &dev->sata_dev.tf, sizeof(qc->result_tf)); | |
233 | return true; | |
234 | } | |
235 | ||
338ec570 DW |
236 | static u8 sas_ata_check_status(struct ata_port *ap) |
237 | { | |
238 | struct domain_device *dev = ap->private_data; | |
239 | return dev->sata_dev.tf.command; | |
240 | } | |
241 | ||
242 | static void sas_ata_phy_reset(struct ata_port *ap) | |
243 | { | |
244 | struct domain_device *dev = ap->private_data; | |
245 | struct sas_internal *i = | |
246 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
a29c0515 | 247 | int res = TMF_RESP_FUNC_FAILED; |
338ec570 DW |
248 | |
249 | if (i->dft->lldd_I_T_nexus_reset) | |
250 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
251 | ||
a29c0515 | 252 | if (res != TMF_RESP_FUNC_COMPLETE) |
338ec570 DW |
253 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__); |
254 | ||
255 | switch (dev->sata_dev.command_set) { | |
256 | case ATA_COMMAND_SET: | |
257 | SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__); | |
9af5c9c9 | 258 | ap->link.device[0].class = ATA_DEV_ATA; |
338ec570 DW |
259 | break; |
260 | case ATAPI_COMMAND_SET: | |
261 | SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__); | |
9af5c9c9 | 262 | ap->link.device[0].class = ATA_DEV_ATAPI; |
338ec570 DW |
263 | break; |
264 | default: | |
265 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
266 | __FUNCTION__, | |
267 | dev->sata_dev.command_set); | |
9af5c9c9 | 268 | ap->link.device[0].class = ATA_DEV_UNKNOWN; |
338ec570 DW |
269 | break; |
270 | } | |
271 | ||
272 | ap->cbl = ATA_CBL_SATA; | |
273 | } | |
274 | ||
275 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) | |
276 | { | |
277 | if (qc->flags & ATA_QCFLAG_FAILED) | |
278 | qc->err_mask |= AC_ERR_OTHER; | |
279 | ||
1c50dc83 DW |
280 | if (qc->err_mask) { |
281 | /* | |
282 | * Find the sas_task and kill it. By this point, | |
283 | * libata has decided to kill the qc, so we needn't | |
284 | * bother with sas_ata_task_done. But we still | |
285 | * ought to abort the task. | |
286 | */ | |
287 | struct sas_task *task = qc->lldd_task; | |
3a2755af | 288 | unsigned long flags; |
1c50dc83 DW |
289 | |
290 | qc->lldd_task = NULL; | |
291 | if (task) { | |
3a2755af DW |
292 | /* Should this be a AT(API) device reset? */ |
293 | spin_lock_irqsave(&task->task_state_lock, flags); | |
294 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
295 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
296 | ||
1c50dc83 DW |
297 | task->uldd_task = NULL; |
298 | __sas_task_abort(task); | |
299 | } | |
1c50dc83 | 300 | } |
338ec570 DW |
301 | } |
302 | ||
110dd8f1 | 303 | static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, |
338ec570 DW |
304 | u32 val) |
305 | { | |
306 | struct domain_device *dev = ap->private_data; | |
307 | ||
308 | SAS_DPRINTK("STUB %s\n", __FUNCTION__); | |
309 | switch (sc_reg_in) { | |
310 | case SCR_STATUS: | |
311 | dev->sata_dev.sstatus = val; | |
312 | break; | |
313 | case SCR_CONTROL: | |
314 | dev->sata_dev.scontrol = val; | |
315 | break; | |
316 | case SCR_ERROR: | |
317 | dev->sata_dev.serror = val; | |
318 | break; | |
319 | case SCR_ACTIVE: | |
9af5c9c9 | 320 | dev->sata_dev.ap->link.sactive = val; |
338ec570 | 321 | break; |
110dd8f1 JB |
322 | default: |
323 | return -EINVAL; | |
338ec570 | 324 | } |
110dd8f1 | 325 | return 0; |
338ec570 DW |
326 | } |
327 | ||
110dd8f1 JB |
328 | static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in, |
329 | u32 *val) | |
338ec570 DW |
330 | { |
331 | struct domain_device *dev = ap->private_data; | |
332 | ||
333 | SAS_DPRINTK("STUB %s\n", __FUNCTION__); | |
334 | switch (sc_reg_in) { | |
335 | case SCR_STATUS: | |
110dd8f1 JB |
336 | *val = dev->sata_dev.sstatus; |
337 | return 0; | |
338ec570 | 338 | case SCR_CONTROL: |
110dd8f1 JB |
339 | *val = dev->sata_dev.scontrol; |
340 | return 0; | |
338ec570 | 341 | case SCR_ERROR: |
110dd8f1 JB |
342 | *val = dev->sata_dev.serror; |
343 | return 0; | |
338ec570 | 344 | case SCR_ACTIVE: |
9af5c9c9 | 345 | *val = dev->sata_dev.ap->link.sactive; |
110dd8f1 | 346 | return 0; |
338ec570 | 347 | default: |
110dd8f1 | 348 | return -EINVAL; |
338ec570 DW |
349 | } |
350 | } | |
351 | ||
352 | static struct ata_port_operations sas_sata_ops = { | |
5682ed33 TH |
353 | .sff_check_status = sas_ata_check_status, |
354 | .sff_check_altstatus = sas_ata_check_status, | |
355 | .sff_dev_select = ata_noop_dev_select, | |
338ec570 DW |
356 | .phy_reset = sas_ata_phy_reset, |
357 | .post_internal_cmd = sas_ata_post_internal, | |
338ec570 DW |
358 | .qc_prep = ata_noop_qc_prep, |
359 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 360 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
361 | .port_start = ata_sas_port_start, |
362 | .port_stop = ata_sas_port_stop, | |
363 | .scr_read = sas_ata_scr_read, | |
364 | .scr_write = sas_ata_scr_write | |
365 | }; | |
366 | ||
367 | static struct ata_port_info sata_port_info = { | |
368 | .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | | |
369 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, | |
370 | .pio_mask = 0x1f, /* PIO0-4 */ | |
371 | .mwdma_mask = 0x07, /* MWDMA0-2 */ | |
372 | .udma_mask = ATA_UDMA6, | |
373 | .port_ops = &sas_sata_ops | |
374 | }; | |
375 | ||
376 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
377 | struct scsi_target *starget) | |
378 | { | |
379 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
380 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
381 | struct ata_port *ap; | |
382 | ||
383 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 384 | ha->dev, |
338ec570 DW |
385 | sata_port_info.flags, |
386 | &sas_sata_ops); | |
387 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
388 | &sata_port_info, | |
389 | shost); | |
390 | if (!ap) { | |
391 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
392 | return -ENODEV; | |
393 | } | |
394 | ||
395 | ap->private_data = found_dev; | |
396 | ap->cbl = ATA_CBL_SATA; | |
397 | ap->scsi_host = shost; | |
398 | found_dev->sata_dev.ap = ap; | |
399 | ||
400 | return 0; | |
401 | } | |
3a2755af DW |
402 | |
403 | void sas_ata_task_abort(struct sas_task *task) | |
404 | { | |
405 | struct ata_queued_cmd *qc = task->uldd_task; | |
406 | struct completion *waiting; | |
407 | ||
408 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
409 | if (qc->scsicmd) { | |
410 | scsi_req_abort_cmd(qc->scsicmd); | |
411 | scsi_schedule_eh(qc->scsicmd->device->host); | |
412 | return; | |
413 | } | |
414 | ||
415 | /* Internal command, fake a timeout and complete. */ | |
416 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
417 | qc->flags |= ATA_QCFLAG_FAILED; | |
418 | qc->err_mask |= AC_ERR_TIMEOUT; | |
419 | waiting = qc->private_data; | |
420 | complete(waiting); | |
421 | } | |
b9142174 JB |
422 | |
423 | static void sas_task_timedout(unsigned long _task) | |
424 | { | |
425 | struct sas_task *task = (void *) _task; | |
426 | unsigned long flags; | |
427 | ||
428 | spin_lock_irqsave(&task->task_state_lock, flags); | |
429 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
430 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
431 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
432 | ||
433 | complete(&task->completion); | |
434 | } | |
435 | ||
436 | static void sas_disc_task_done(struct sas_task *task) | |
437 | { | |
438 | if (!del_timer(&task->timer)) | |
439 | return; | |
440 | complete(&task->completion); | |
441 | } | |
442 | ||
443 | #define SAS_DEV_TIMEOUT 10 | |
444 | ||
445 | /** | |
446 | * sas_execute_task -- Basic task processing for discovery | |
447 | * @task: the task to be executed | |
448 | * @buffer: pointer to buffer to do I/O | |
449 | * @size: size of @buffer | |
1d1bbee6 | 450 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
451 | */ |
452 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, | |
1d1bbee6 | 453 | enum dma_data_direction dma_dir) |
b9142174 JB |
454 | { |
455 | int res = 0; | |
456 | struct scatterlist *scatter = NULL; | |
457 | struct task_status_struct *ts = &task->task_status; | |
458 | int num_scatter = 0; | |
459 | int retries = 0; | |
460 | struct sas_internal *i = | |
461 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
462 | ||
1d1bbee6 | 463 | if (dma_dir != DMA_NONE) { |
b9142174 JB |
464 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
465 | if (!scatter) | |
466 | goto out; | |
467 | ||
468 | sg_init_one(scatter, buffer, size); | |
469 | num_scatter = 1; | |
470 | } | |
471 | ||
472 | task->task_proto = task->dev->tproto; | |
473 | task->scatter = scatter; | |
474 | task->num_scatter = num_scatter; | |
475 | task->total_xfer_len = size; | |
1d1bbee6 | 476 | task->data_dir = dma_dir; |
b9142174 | 477 | task->task_done = sas_disc_task_done; |
1d1bbee6 | 478 | if (dma_dir != DMA_NONE && |
b9142174 | 479 | sas_protocol_ata(task->task_proto)) { |
1d1bbee6 | 480 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
b9142174 JB |
481 | task->scatter, |
482 | task->num_scatter, | |
483 | task->data_dir); | |
484 | } | |
485 | ||
486 | for (retries = 0; retries < 5; retries++) { | |
487 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
488 | init_completion(&task->completion); | |
489 | ||
490 | task->timer.data = (unsigned long) task; | |
491 | task->timer.function = sas_task_timedout; | |
492 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; | |
493 | add_timer(&task->timer); | |
494 | ||
495 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); | |
496 | if (res) { | |
497 | del_timer(&task->timer); | |
498 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", | |
499 | res); | |
500 | goto ex_err; | |
501 | } | |
502 | wait_for_completion(&task->completion); | |
32e8ae36 | 503 | res = -ECOMM; |
b9142174 JB |
504 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
505 | int res2; | |
506 | SAS_DPRINTK("task aborted, flags:0x%x\n", | |
507 | task->task_state_flags); | |
508 | res2 = i->dft->lldd_abort_task(task); | |
509 | SAS_DPRINTK("came back from abort task\n"); | |
510 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
511 | if (res2 == TMF_RESP_FUNC_COMPLETE) | |
512 | continue; /* Retry the task */ | |
513 | else | |
514 | goto ex_err; | |
515 | } | |
516 | } | |
517 | if (task->task_status.stat == SAM_BUSY || | |
518 | task->task_status.stat == SAM_TASK_SET_FULL || | |
519 | task->task_status.stat == SAS_QUEUE_FULL) { | |
520 | SAS_DPRINTK("task: q busy, sleeping...\n"); | |
521 | schedule_timeout_interruptible(HZ); | |
522 | } else if (task->task_status.stat == SAM_CHECK_COND) { | |
523 | struct scsi_sense_hdr shdr; | |
524 | ||
525 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, | |
526 | &shdr)) { | |
527 | SAS_DPRINTK("couldn't normalize sense\n"); | |
528 | continue; | |
529 | } | |
530 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || | |
531 | (shdr.sense_key == 2 && shdr.asc == 4 && | |
532 | shdr.ascq == 1)) { | |
533 | SAS_DPRINTK("device %016llx LUN: %016llx " | |
534 | "powering up or not ready yet, " | |
535 | "sleeping...\n", | |
536 | SAS_ADDR(task->dev->sas_addr), | |
537 | SAS_ADDR(task->ssp_task.LUN)); | |
538 | ||
539 | schedule_timeout_interruptible(5*HZ); | |
540 | } else if (shdr.sense_key == 1) { | |
541 | res = 0; | |
542 | break; | |
543 | } else if (shdr.sense_key == 5) { | |
544 | break; | |
545 | } else { | |
546 | SAS_DPRINTK("dev %016llx LUN: %016llx " | |
547 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" | |
548 | "\n", | |
549 | SAS_ADDR(task->dev->sas_addr), | |
550 | SAS_ADDR(task->ssp_task.LUN), | |
551 | shdr.sense_key, | |
552 | shdr.asc, shdr.ascq); | |
553 | } | |
554 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || | |
555 | task->task_status.stat != SAM_GOOD) { | |
556 | SAS_DPRINTK("task finished with resp:0x%x, " | |
557 | "stat:0x%x\n", | |
558 | task->task_status.resp, | |
559 | task->task_status.stat); | |
560 | goto ex_err; | |
561 | } else { | |
562 | res = 0; | |
563 | break; | |
564 | } | |
565 | } | |
566 | ex_err: | |
1d1bbee6 | 567 | if (dma_dir != DMA_NONE) { |
b9142174 | 568 | if (sas_protocol_ata(task->task_proto)) |
1d1bbee6 | 569 | dma_unmap_sg(task->dev->port->ha->dev, |
b9142174 JB |
570 | task->scatter, task->num_scatter, |
571 | task->data_dir); | |
572 | kfree(scatter); | |
573 | } | |
574 | out: | |
575 | return res; | |
576 | } | |
577 | ||
578 | /* ---------- SATA ---------- */ | |
579 | ||
580 | static void sas_get_ata_command_set(struct domain_device *dev) | |
581 | { | |
582 | struct dev_to_host_fis *fis = | |
583 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
584 | ||
585 | if ((fis->sector_count == 1 && /* ATA */ | |
586 | fis->lbal == 1 && | |
587 | fis->lbam == 0 && | |
588 | fis->lbah == 0 && | |
589 | fis->device == 0) | |
590 | || | |
591 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
592 | fis->lbal == 0 && | |
593 | fis->lbam == 0xCE && | |
594 | fis->lbah == 0xAA && | |
595 | (fis->device & ~0x10) == 0)) | |
596 | ||
597 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
598 | ||
599 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
600 | fis->lbal == 1 && | |
601 | fis->byte_count_low == 0x14 && | |
602 | fis->byte_count_high == 0xEB && | |
603 | (fis->device & ~0x10) == 0)) | |
604 | ||
605 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
606 | ||
607 | else if ((fis->sector_count == 1 && /* SEMB */ | |
608 | fis->lbal == 1 && | |
609 | fis->lbam == 0x3C && | |
610 | fis->lbah == 0xC3 && | |
611 | fis->device == 0) | |
612 | || | |
613 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
614 | fis->lbal == 1 && | |
615 | fis->byte_count_low == 0x69 && | |
616 | fis->byte_count_high == 0x96 && | |
617 | (fis->device & ~0x10) == 0)) | |
618 | ||
619 | /* Treat it as a superset? */ | |
620 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
621 | } | |
622 | ||
623 | /** | |
624 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery | |
625 | * @dev: the device to send the command to | |
626 | * @command: the command register | |
627 | * @features: the features register | |
628 | * @buffer: pointer to buffer to do I/O | |
629 | * @size: size of @buffer | |
1d1bbee6 | 630 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
631 | */ |
632 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, | |
633 | u8 features, void *buffer, int size, | |
1d1bbee6 | 634 | enum dma_data_direction dma_dir) |
b9142174 JB |
635 | { |
636 | int res = 0; | |
637 | struct sas_task *task; | |
638 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) | |
639 | &dev->frame_rcvd[0]; | |
640 | ||
641 | res = -ENOMEM; | |
642 | task = sas_alloc_task(GFP_KERNEL); | |
643 | if (!task) | |
644 | goto out; | |
645 | ||
646 | task->dev = dev; | |
647 | ||
648 | task->ata_task.fis.fis_type = 0x27; | |
649 | task->ata_task.fis.command = command; | |
650 | task->ata_task.fis.features = features; | |
651 | task->ata_task.fis.device = d2h_fis->device; | |
652 | task->ata_task.retry_count = 1; | |
653 | ||
1d1bbee6 | 654 | res = sas_execute_task(task, buffer, size, dma_dir); |
b9142174 JB |
655 | |
656 | sas_free_task(task); | |
657 | out: | |
658 | return res; | |
659 | } | |
660 | ||
b9142174 JB |
661 | #define ATA_IDENTIFY_DEV 0xEC |
662 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 | |
663 | #define ATA_SET_FEATURES 0xEF | |
664 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 | |
665 | ||
666 | /** | |
667 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) | |
668 | * @dev: STP/SATA device of interest (ATA/ATAPI) | |
669 | * | |
670 | * The LLDD has already been notified of this device, so that we can | |
671 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY | |
672 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its | |
673 | * performance for this device. | |
674 | */ | |
675 | static int sas_discover_sata_dev(struct domain_device *dev) | |
676 | { | |
677 | int res; | |
678 | __le16 *identify_x; | |
679 | u8 command; | |
680 | ||
681 | identify_x = kzalloc(512, GFP_KERNEL); | |
682 | if (!identify_x) | |
683 | return -ENOMEM; | |
684 | ||
685 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { | |
686 | dev->sata_dev.identify_device = identify_x; | |
687 | command = ATA_IDENTIFY_DEV; | |
688 | } else { | |
689 | dev->sata_dev.identify_packet_device = identify_x; | |
690 | command = ATA_IDENTIFY_PACKET_DEV; | |
691 | } | |
692 | ||
693 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 694 | DMA_FROM_DEVICE); |
b9142174 JB |
695 | if (res) |
696 | goto out_err; | |
697 | ||
698 | /* lives on the media? */ | |
699 | if (le16_to_cpu(identify_x[0]) & 4) { | |
700 | /* incomplete response */ | |
701 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " | |
702 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); | |
703 | if (!le16_to_cpu(identify_x[83] & (1<<6))) | |
704 | goto cont1; | |
705 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, | |
706 | ATA_FEATURE_PUP_STBY_SPIN_UP, | |
1d1bbee6 | 707 | NULL, 0, DMA_NONE); |
b9142174 JB |
708 | if (res) |
709 | goto cont1; | |
710 | ||
711 | schedule_timeout_interruptible(5*HZ); /* More time? */ | |
712 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 713 | DMA_FROM_DEVICE); |
b9142174 JB |
714 | if (res) |
715 | goto out_err; | |
716 | } | |
717 | cont1: | |
b9142174 JB |
718 | /* XXX Hint: register this SATA device with SATL. |
719 | When this returns, dev->sata_dev->lu is alive and | |
720 | present. | |
721 | sas_satl_register_dev(dev); | |
722 | */ | |
723 | ||
724 | sas_fill_in_rphy(dev, dev->rphy); | |
725 | ||
726 | return 0; | |
727 | out_err: | |
728 | dev->sata_dev.identify_packet_device = NULL; | |
729 | dev->sata_dev.identify_device = NULL; | |
730 | kfree(identify_x); | |
731 | return res; | |
732 | } | |
733 | ||
734 | static int sas_discover_sata_pm(struct domain_device *dev) | |
735 | { | |
736 | return -ENODEV; | |
737 | } | |
738 | ||
739 | /** | |
740 | * sas_discover_sata -- discover an STP/SATA domain device | |
741 | * @dev: pointer to struct domain_device of interest | |
742 | * | |
743 | * First we notify the LLDD of this device, so we can send frames to | |
744 | * it. Then depending on the type of device we call the appropriate | |
745 | * discover functions. Once device discover is done, we notify the | |
746 | * LLDD so that it can fine-tune its parameters for the device, by | |
747 | * removing it and then adding it. That is, the second time around, | |
748 | * the driver would have certain fields, that it is looking at, set. | |
749 | * Finally we initialize the kobj so that the device can be added to | |
750 | * the system at registration time. Devices directly attached to a HA | |
751 | * port, have no parents. All other devices do, and should have their | |
752 | * "parent" pointer set appropriately before calling this function. | |
753 | */ | |
754 | int sas_discover_sata(struct domain_device *dev) | |
755 | { | |
756 | int res; | |
757 | ||
758 | sas_get_ata_command_set(dev); | |
759 | ||
760 | res = sas_notify_lldd_dev_found(dev); | |
761 | if (res) | |
762 | return res; | |
763 | ||
764 | switch (dev->dev_type) { | |
765 | case SATA_DEV: | |
766 | res = sas_discover_sata_dev(dev); | |
767 | break; | |
768 | case SATA_PM: | |
769 | res = sas_discover_sata_pm(dev); | |
770 | break; | |
771 | default: | |
772 | break; | |
773 | } | |
774 | sas_notify_lldd_dev_gone(dev); | |
775 | if (!res) { | |
776 | sas_notify_lldd_dev_found(dev); | |
777 | res = sas_rphy_add(dev->rphy); | |
778 | } | |
779 | ||
780 | return res; | |
781 | } |