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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; | |
161 | unsigned int num = 0; | |
162 | unsigned int xfer = 0; | |
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 DW |
178 | task->uldd_task = qc; |
179 | if (is_atapi_taskfile(&qc->tf)) { | |
180 | memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); | |
181 | task->total_xfer_len = qc->nbytes + qc->pad_len; | |
182 | task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem; | |
183 | } else { | |
184 | ata_for_each_sg(sg, qc) { | |
185 | num++; | |
186 | xfer += sg->length; | |
187 | } | |
188 | ||
189 | task->total_xfer_len = xfer; | |
190 | task->num_scatter = num; | |
191 | } | |
192 | ||
193 | task->data_dir = qc->dma_dir; | |
194 | task->scatter = qc->__sg; | |
195 | task->ata_task.retry_count = 1; | |
196 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1c50dc83 | 197 | qc->lldd_task = task; |
338ec570 DW |
198 | |
199 | switch (qc->tf.protocol) { | |
200 | case ATA_PROT_NCQ: | |
201 | task->ata_task.use_ncq = 1; | |
202 | /* fall through */ | |
203 | case ATA_PROT_ATAPI_DMA: | |
204 | case ATA_PROT_DMA: | |
205 | task->ata_task.dma_xfer = 1; | |
206 | break; | |
207 | } | |
208 | ||
fe059f12 DW |
209 | if (qc->scsicmd) |
210 | ASSIGN_SAS_TASK(qc->scsicmd, task); | |
211 | ||
338ec570 DW |
212 | if (sas_ha->lldd_max_execute_num < 2) |
213 | res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); | |
214 | else | |
215 | res = sas_queue_up(task); | |
216 | ||
217 | /* Examine */ | |
218 | if (res) { | |
219 | SAS_DPRINTK("lldd_execute_task returned: %d\n", res); | |
220 | ||
fe059f12 DW |
221 | if (qc->scsicmd) |
222 | ASSIGN_SAS_TASK(qc->scsicmd, NULL); | |
338ec570 | 223 | sas_free_task(task); |
35a7f2f6 | 224 | return AC_ERR_SYSTEM; |
338ec570 DW |
225 | } |
226 | ||
35a7f2f6 | 227 | return 0; |
338ec570 DW |
228 | } |
229 | ||
230 | static u8 sas_ata_check_status(struct ata_port *ap) | |
231 | { | |
232 | struct domain_device *dev = ap->private_data; | |
233 | return dev->sata_dev.tf.command; | |
234 | } | |
235 | ||
236 | static void sas_ata_phy_reset(struct ata_port *ap) | |
237 | { | |
238 | struct domain_device *dev = ap->private_data; | |
239 | struct sas_internal *i = | |
240 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
241 | int res = 0; | |
242 | ||
243 | if (i->dft->lldd_I_T_nexus_reset) | |
244 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
245 | ||
246 | if (res) | |
247 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__); | |
248 | ||
249 | switch (dev->sata_dev.command_set) { | |
250 | case ATA_COMMAND_SET: | |
251 | SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__); | |
252 | ap->device[0].class = ATA_DEV_ATA; | |
253 | break; | |
254 | case ATAPI_COMMAND_SET: | |
255 | SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__); | |
256 | ap->device[0].class = ATA_DEV_ATAPI; | |
257 | break; | |
258 | default: | |
259 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
260 | __FUNCTION__, | |
261 | dev->sata_dev.command_set); | |
5986c3d3 | 262 | ap->device[0].class = ATA_DEV_UNKNOWN; |
338ec570 DW |
263 | break; |
264 | } | |
265 | ||
266 | ap->cbl = ATA_CBL_SATA; | |
267 | } | |
268 | ||
269 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) | |
270 | { | |
271 | if (qc->flags & ATA_QCFLAG_FAILED) | |
272 | qc->err_mask |= AC_ERR_OTHER; | |
273 | ||
1c50dc83 DW |
274 | if (qc->err_mask) { |
275 | /* | |
276 | * Find the sas_task and kill it. By this point, | |
277 | * libata has decided to kill the qc, so we needn't | |
278 | * bother with sas_ata_task_done. But we still | |
279 | * ought to abort the task. | |
280 | */ | |
281 | struct sas_task *task = qc->lldd_task; | |
3a2755af | 282 | unsigned long flags; |
1c50dc83 DW |
283 | |
284 | qc->lldd_task = NULL; | |
285 | if (task) { | |
3a2755af DW |
286 | /* Should this be a AT(API) device reset? */ |
287 | spin_lock_irqsave(&task->task_state_lock, flags); | |
288 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
289 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
290 | ||
1c50dc83 DW |
291 | task->uldd_task = NULL; |
292 | __sas_task_abort(task); | |
293 | } | |
1c50dc83 | 294 | } |
338ec570 DW |
295 | } |
296 | ||
297 | static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) | |
298 | { | |
299 | struct domain_device *dev = ap->private_data; | |
300 | memcpy(tf, &dev->sata_dev.tf, sizeof (*tf)); | |
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: | |
320 | dev->sata_dev.ap->sactive = val; | |
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: |
110dd8f1 JB |
345 | *val = dev->sata_dev.ap->sactive; |
346 | return 0; | |
338ec570 | 347 | default: |
110dd8f1 | 348 | return -EINVAL; |
338ec570 DW |
349 | } |
350 | } | |
351 | ||
352 | static struct ata_port_operations sas_sata_ops = { | |
353 | .port_disable = ata_port_disable, | |
354 | .check_status = sas_ata_check_status, | |
355 | .check_altstatus = sas_ata_check_status, | |
356 | .dev_select = ata_noop_dev_select, | |
357 | .phy_reset = sas_ata_phy_reset, | |
358 | .post_internal_cmd = sas_ata_post_internal, | |
359 | .tf_read = sas_ata_tf_read, | |
360 | .qc_prep = ata_noop_qc_prep, | |
361 | .qc_issue = sas_ata_qc_issue, | |
362 | .port_start = ata_sas_port_start, | |
363 | .port_stop = ata_sas_port_stop, | |
364 | .scr_read = sas_ata_scr_read, | |
365 | .scr_write = sas_ata_scr_write | |
366 | }; | |
367 | ||
368 | static struct ata_port_info sata_port_info = { | |
369 | .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | | |
370 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, | |
371 | .pio_mask = 0x1f, /* PIO0-4 */ | |
372 | .mwdma_mask = 0x07, /* MWDMA0-2 */ | |
373 | .udma_mask = ATA_UDMA6, | |
374 | .port_ops = &sas_sata_ops | |
375 | }; | |
376 | ||
377 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
378 | struct scsi_target *starget) | |
379 | { | |
380 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
381 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
382 | struct ata_port *ap; | |
383 | ||
384 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 385 | ha->dev, |
338ec570 DW |
386 | sata_port_info.flags, |
387 | &sas_sata_ops); | |
388 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
389 | &sata_port_info, | |
390 | shost); | |
391 | if (!ap) { | |
392 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
393 | return -ENODEV; | |
394 | } | |
395 | ||
396 | ap->private_data = found_dev; | |
397 | ap->cbl = ATA_CBL_SATA; | |
398 | ap->scsi_host = shost; | |
399 | found_dev->sata_dev.ap = ap; | |
400 | ||
401 | return 0; | |
402 | } | |
3a2755af DW |
403 | |
404 | void sas_ata_task_abort(struct sas_task *task) | |
405 | { | |
406 | struct ata_queued_cmd *qc = task->uldd_task; | |
407 | struct completion *waiting; | |
408 | ||
409 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
410 | if (qc->scsicmd) { | |
411 | scsi_req_abort_cmd(qc->scsicmd); | |
412 | scsi_schedule_eh(qc->scsicmd->device->host); | |
413 | return; | |
414 | } | |
415 | ||
416 | /* Internal command, fake a timeout and complete. */ | |
417 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
418 | qc->flags |= ATA_QCFLAG_FAILED; | |
419 | qc->err_mask |= AC_ERR_TIMEOUT; | |
420 | waiting = qc->private_data; | |
421 | complete(waiting); | |
422 | } | |
b9142174 JB |
423 | |
424 | static void sas_task_timedout(unsigned long _task) | |
425 | { | |
426 | struct sas_task *task = (void *) _task; | |
427 | unsigned long flags; | |
428 | ||
429 | spin_lock_irqsave(&task->task_state_lock, flags); | |
430 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
431 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
432 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
433 | ||
434 | complete(&task->completion); | |
435 | } | |
436 | ||
437 | static void sas_disc_task_done(struct sas_task *task) | |
438 | { | |
439 | if (!del_timer(&task->timer)) | |
440 | return; | |
441 | complete(&task->completion); | |
442 | } | |
443 | ||
444 | #define SAS_DEV_TIMEOUT 10 | |
445 | ||
446 | /** | |
447 | * sas_execute_task -- Basic task processing for discovery | |
448 | * @task: the task to be executed | |
449 | * @buffer: pointer to buffer to do I/O | |
450 | * @size: size of @buffer | |
1d1bbee6 | 451 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
452 | */ |
453 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, | |
1d1bbee6 | 454 | enum dma_data_direction dma_dir) |
b9142174 JB |
455 | { |
456 | int res = 0; | |
457 | struct scatterlist *scatter = NULL; | |
458 | struct task_status_struct *ts = &task->task_status; | |
459 | int num_scatter = 0; | |
460 | int retries = 0; | |
461 | struct sas_internal *i = | |
462 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
463 | ||
1d1bbee6 | 464 | if (dma_dir != DMA_NONE) { |
b9142174 JB |
465 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
466 | if (!scatter) | |
467 | goto out; | |
468 | ||
469 | sg_init_one(scatter, buffer, size); | |
470 | num_scatter = 1; | |
471 | } | |
472 | ||
473 | task->task_proto = task->dev->tproto; | |
474 | task->scatter = scatter; | |
475 | task->num_scatter = num_scatter; | |
476 | task->total_xfer_len = size; | |
1d1bbee6 | 477 | task->data_dir = dma_dir; |
b9142174 | 478 | task->task_done = sas_disc_task_done; |
1d1bbee6 | 479 | if (dma_dir != DMA_NONE && |
b9142174 | 480 | sas_protocol_ata(task->task_proto)) { |
1d1bbee6 | 481 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
b9142174 JB |
482 | task->scatter, |
483 | task->num_scatter, | |
484 | task->data_dir); | |
485 | } | |
486 | ||
487 | for (retries = 0; retries < 5; retries++) { | |
488 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
489 | init_completion(&task->completion); | |
490 | ||
491 | task->timer.data = (unsigned long) task; | |
492 | task->timer.function = sas_task_timedout; | |
493 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; | |
494 | add_timer(&task->timer); | |
495 | ||
496 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); | |
497 | if (res) { | |
498 | del_timer(&task->timer); | |
499 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", | |
500 | res); | |
501 | goto ex_err; | |
502 | } | |
503 | wait_for_completion(&task->completion); | |
504 | res = -ETASK; | |
505 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { | |
506 | int res2; | |
507 | SAS_DPRINTK("task aborted, flags:0x%x\n", | |
508 | task->task_state_flags); | |
509 | res2 = i->dft->lldd_abort_task(task); | |
510 | SAS_DPRINTK("came back from abort task\n"); | |
511 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
512 | if (res2 == TMF_RESP_FUNC_COMPLETE) | |
513 | continue; /* Retry the task */ | |
514 | else | |
515 | goto ex_err; | |
516 | } | |
517 | } | |
518 | if (task->task_status.stat == SAM_BUSY || | |
519 | task->task_status.stat == SAM_TASK_SET_FULL || | |
520 | task->task_status.stat == SAS_QUEUE_FULL) { | |
521 | SAS_DPRINTK("task: q busy, sleeping...\n"); | |
522 | schedule_timeout_interruptible(HZ); | |
523 | } else if (task->task_status.stat == SAM_CHECK_COND) { | |
524 | struct scsi_sense_hdr shdr; | |
525 | ||
526 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, | |
527 | &shdr)) { | |
528 | SAS_DPRINTK("couldn't normalize sense\n"); | |
529 | continue; | |
530 | } | |
531 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || | |
532 | (shdr.sense_key == 2 && shdr.asc == 4 && | |
533 | shdr.ascq == 1)) { | |
534 | SAS_DPRINTK("device %016llx LUN: %016llx " | |
535 | "powering up or not ready yet, " | |
536 | "sleeping...\n", | |
537 | SAS_ADDR(task->dev->sas_addr), | |
538 | SAS_ADDR(task->ssp_task.LUN)); | |
539 | ||
540 | schedule_timeout_interruptible(5*HZ); | |
541 | } else if (shdr.sense_key == 1) { | |
542 | res = 0; | |
543 | break; | |
544 | } else if (shdr.sense_key == 5) { | |
545 | break; | |
546 | } else { | |
547 | SAS_DPRINTK("dev %016llx LUN: %016llx " | |
548 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" | |
549 | "\n", | |
550 | SAS_ADDR(task->dev->sas_addr), | |
551 | SAS_ADDR(task->ssp_task.LUN), | |
552 | shdr.sense_key, | |
553 | shdr.asc, shdr.ascq); | |
554 | } | |
555 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || | |
556 | task->task_status.stat != SAM_GOOD) { | |
557 | SAS_DPRINTK("task finished with resp:0x%x, " | |
558 | "stat:0x%x\n", | |
559 | task->task_status.resp, | |
560 | task->task_status.stat); | |
561 | goto ex_err; | |
562 | } else { | |
563 | res = 0; | |
564 | break; | |
565 | } | |
566 | } | |
567 | ex_err: | |
1d1bbee6 | 568 | if (dma_dir != DMA_NONE) { |
b9142174 | 569 | if (sas_protocol_ata(task->task_proto)) |
1d1bbee6 | 570 | dma_unmap_sg(task->dev->port->ha->dev, |
b9142174 JB |
571 | task->scatter, task->num_scatter, |
572 | task->data_dir); | |
573 | kfree(scatter); | |
574 | } | |
575 | out: | |
576 | return res; | |
577 | } | |
578 | ||
579 | /* ---------- SATA ---------- */ | |
580 | ||
581 | static void sas_get_ata_command_set(struct domain_device *dev) | |
582 | { | |
583 | struct dev_to_host_fis *fis = | |
584 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
585 | ||
586 | if ((fis->sector_count == 1 && /* ATA */ | |
587 | fis->lbal == 1 && | |
588 | fis->lbam == 0 && | |
589 | fis->lbah == 0 && | |
590 | fis->device == 0) | |
591 | || | |
592 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
593 | fis->lbal == 0 && | |
594 | fis->lbam == 0xCE && | |
595 | fis->lbah == 0xAA && | |
596 | (fis->device & ~0x10) == 0)) | |
597 | ||
598 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
599 | ||
600 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
601 | fis->lbal == 1 && | |
602 | fis->byte_count_low == 0x14 && | |
603 | fis->byte_count_high == 0xEB && | |
604 | (fis->device & ~0x10) == 0)) | |
605 | ||
606 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
607 | ||
608 | else if ((fis->sector_count == 1 && /* SEMB */ | |
609 | fis->lbal == 1 && | |
610 | fis->lbam == 0x3C && | |
611 | fis->lbah == 0xC3 && | |
612 | fis->device == 0) | |
613 | || | |
614 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
615 | fis->lbal == 1 && | |
616 | fis->byte_count_low == 0x69 && | |
617 | fis->byte_count_high == 0x96 && | |
618 | (fis->device & ~0x10) == 0)) | |
619 | ||
620 | /* Treat it as a superset? */ | |
621 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
622 | } | |
623 | ||
624 | /** | |
625 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery | |
626 | * @dev: the device to send the command to | |
627 | * @command: the command register | |
628 | * @features: the features register | |
629 | * @buffer: pointer to buffer to do I/O | |
630 | * @size: size of @buffer | |
1d1bbee6 | 631 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
632 | */ |
633 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, | |
634 | u8 features, void *buffer, int size, | |
1d1bbee6 | 635 | enum dma_data_direction dma_dir) |
b9142174 JB |
636 | { |
637 | int res = 0; | |
638 | struct sas_task *task; | |
639 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) | |
640 | &dev->frame_rcvd[0]; | |
641 | ||
642 | res = -ENOMEM; | |
643 | task = sas_alloc_task(GFP_KERNEL); | |
644 | if (!task) | |
645 | goto out; | |
646 | ||
647 | task->dev = dev; | |
648 | ||
649 | task->ata_task.fis.fis_type = 0x27; | |
650 | task->ata_task.fis.command = command; | |
651 | task->ata_task.fis.features = features; | |
652 | task->ata_task.fis.device = d2h_fis->device; | |
653 | task->ata_task.retry_count = 1; | |
654 | ||
1d1bbee6 | 655 | res = sas_execute_task(task, buffer, size, dma_dir); |
b9142174 JB |
656 | |
657 | sas_free_task(task); | |
658 | out: | |
659 | return res; | |
660 | } | |
661 | ||
662 | static void sas_sata_propagate_sas_addr(struct domain_device *dev) | |
663 | { | |
664 | unsigned long flags; | |
665 | struct asd_sas_port *port = dev->port; | |
666 | struct asd_sas_phy *phy; | |
667 | ||
668 | BUG_ON(dev->parent); | |
669 | ||
670 | memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE); | |
671 | spin_lock_irqsave(&port->phy_list_lock, flags); | |
672 | list_for_each_entry(phy, &port->phy_list, port_phy_el) | |
673 | memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE); | |
674 | spin_unlock_irqrestore(&port->phy_list_lock, flags); | |
675 | } | |
676 | ||
677 | #define ATA_IDENTIFY_DEV 0xEC | |
678 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 | |
679 | #define ATA_SET_FEATURES 0xEF | |
680 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 | |
681 | ||
682 | /** | |
683 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) | |
684 | * @dev: STP/SATA device of interest (ATA/ATAPI) | |
685 | * | |
686 | * The LLDD has already been notified of this device, so that we can | |
687 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY | |
688 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its | |
689 | * performance for this device. | |
690 | */ | |
691 | static int sas_discover_sata_dev(struct domain_device *dev) | |
692 | { | |
693 | int res; | |
694 | __le16 *identify_x; | |
695 | u8 command; | |
696 | ||
697 | identify_x = kzalloc(512, GFP_KERNEL); | |
698 | if (!identify_x) | |
699 | return -ENOMEM; | |
700 | ||
701 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { | |
702 | dev->sata_dev.identify_device = identify_x; | |
703 | command = ATA_IDENTIFY_DEV; | |
704 | } else { | |
705 | dev->sata_dev.identify_packet_device = identify_x; | |
706 | command = ATA_IDENTIFY_PACKET_DEV; | |
707 | } | |
708 | ||
709 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 710 | DMA_FROM_DEVICE); |
b9142174 JB |
711 | if (res) |
712 | goto out_err; | |
713 | ||
714 | /* lives on the media? */ | |
715 | if (le16_to_cpu(identify_x[0]) & 4) { | |
716 | /* incomplete response */ | |
717 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " | |
718 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); | |
719 | if (!le16_to_cpu(identify_x[83] & (1<<6))) | |
720 | goto cont1; | |
721 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, | |
722 | ATA_FEATURE_PUP_STBY_SPIN_UP, | |
1d1bbee6 | 723 | NULL, 0, DMA_NONE); |
b9142174 JB |
724 | if (res) |
725 | goto cont1; | |
726 | ||
727 | schedule_timeout_interruptible(5*HZ); /* More time? */ | |
728 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 729 | DMA_FROM_DEVICE); |
b9142174 JB |
730 | if (res) |
731 | goto out_err; | |
732 | } | |
733 | cont1: | |
734 | /* Get WWN */ | |
735 | if (dev->port->oob_mode != SATA_OOB_MODE) { | |
736 | memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr, | |
737 | SAS_ADDR_SIZE); | |
738 | } else if (dev->sata_dev.command_set == ATA_COMMAND_SET && | |
739 | (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000) | |
740 | == 0x5000) { | |
741 | int i; | |
742 | ||
743 | for (i = 0; i < 4; i++) { | |
744 | dev->sas_addr[2*i] = | |
745 | (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8; | |
746 | dev->sas_addr[2*i+1] = | |
747 | le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF; | |
748 | } | |
749 | } | |
750 | sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr); | |
751 | if (!dev->parent) | |
752 | sas_sata_propagate_sas_addr(dev); | |
753 | ||
754 | /* XXX Hint: register this SATA device with SATL. | |
755 | When this returns, dev->sata_dev->lu is alive and | |
756 | present. | |
757 | sas_satl_register_dev(dev); | |
758 | */ | |
759 | ||
760 | sas_fill_in_rphy(dev, dev->rphy); | |
761 | ||
762 | return 0; | |
763 | out_err: | |
764 | dev->sata_dev.identify_packet_device = NULL; | |
765 | dev->sata_dev.identify_device = NULL; | |
766 | kfree(identify_x); | |
767 | return res; | |
768 | } | |
769 | ||
770 | static int sas_discover_sata_pm(struct domain_device *dev) | |
771 | { | |
772 | return -ENODEV; | |
773 | } | |
774 | ||
775 | /** | |
776 | * sas_discover_sata -- discover an STP/SATA domain device | |
777 | * @dev: pointer to struct domain_device of interest | |
778 | * | |
779 | * First we notify the LLDD of this device, so we can send frames to | |
780 | * it. Then depending on the type of device we call the appropriate | |
781 | * discover functions. Once device discover is done, we notify the | |
782 | * LLDD so that it can fine-tune its parameters for the device, by | |
783 | * removing it and then adding it. That is, the second time around, | |
784 | * the driver would have certain fields, that it is looking at, set. | |
785 | * Finally we initialize the kobj so that the device can be added to | |
786 | * the system at registration time. Devices directly attached to a HA | |
787 | * port, have no parents. All other devices do, and should have their | |
788 | * "parent" pointer set appropriately before calling this function. | |
789 | */ | |
790 | int sas_discover_sata(struct domain_device *dev) | |
791 | { | |
792 | int res; | |
793 | ||
794 | sas_get_ata_command_set(dev); | |
795 | ||
796 | res = sas_notify_lldd_dev_found(dev); | |
797 | if (res) | |
798 | return res; | |
799 | ||
800 | switch (dev->dev_type) { | |
801 | case SATA_DEV: | |
802 | res = sas_discover_sata_dev(dev); | |
803 | break; | |
804 | case SATA_PM: | |
805 | res = sas_discover_sata_pm(dev); | |
806 | break; | |
807 | default: | |
808 | break; | |
809 | } | |
810 | sas_notify_lldd_dev_gone(dev); | |
811 | if (!res) { | |
812 | sas_notify_lldd_dev_found(dev); | |
813 | res = sas_rphy_add(dev->rphy); | |
814 | } | |
815 | ||
816 | return res; | |
817 | } |