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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 | ||
338ec570 DW |
241 | static void sas_ata_phy_reset(struct ata_port *ap) |
242 | { | |
243 | struct domain_device *dev = ap->private_data; | |
244 | struct sas_internal *i = | |
245 | to_sas_internal(dev->port->ha->core.shost->transportt); | |
a29c0515 | 246 | int res = TMF_RESP_FUNC_FAILED; |
338ec570 DW |
247 | |
248 | if (i->dft->lldd_I_T_nexus_reset) | |
249 | res = i->dft->lldd_I_T_nexus_reset(dev); | |
250 | ||
a29c0515 | 251 | if (res != TMF_RESP_FUNC_COMPLETE) |
cadbd4a5 | 252 | SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); |
338ec570 DW |
253 | |
254 | switch (dev->sata_dev.command_set) { | |
255 | case ATA_COMMAND_SET: | |
cadbd4a5 | 256 | SAS_DPRINTK("%s: Found ATA device.\n", __func__); |
9af5c9c9 | 257 | ap->link.device[0].class = ATA_DEV_ATA; |
338ec570 DW |
258 | break; |
259 | case ATAPI_COMMAND_SET: | |
cadbd4a5 | 260 | SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); |
9af5c9c9 | 261 | ap->link.device[0].class = ATA_DEV_ATAPI; |
338ec570 DW |
262 | break; |
263 | default: | |
264 | SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", | |
cadbd4a5 | 265 | __func__, |
338ec570 | 266 | dev->sata_dev.command_set); |
9af5c9c9 | 267 | ap->link.device[0].class = ATA_DEV_UNKNOWN; |
338ec570 DW |
268 | break; |
269 | } | |
270 | ||
271 | ap->cbl = ATA_CBL_SATA; | |
272 | } | |
273 | ||
274 | static void sas_ata_post_internal(struct ata_queued_cmd *qc) | |
275 | { | |
276 | if (qc->flags & ATA_QCFLAG_FAILED) | |
277 | qc->err_mask |= AC_ERR_OTHER; | |
278 | ||
1c50dc83 DW |
279 | if (qc->err_mask) { |
280 | /* | |
281 | * Find the sas_task and kill it. By this point, | |
282 | * libata has decided to kill the qc, so we needn't | |
283 | * bother with sas_ata_task_done. But we still | |
284 | * ought to abort the task. | |
285 | */ | |
286 | struct sas_task *task = qc->lldd_task; | |
3a2755af | 287 | unsigned long flags; |
1c50dc83 DW |
288 | |
289 | qc->lldd_task = NULL; | |
290 | if (task) { | |
3a2755af DW |
291 | /* Should this be a AT(API) device reset? */ |
292 | spin_lock_irqsave(&task->task_state_lock, flags); | |
293 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
294 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
295 | ||
1c50dc83 DW |
296 | task->uldd_task = NULL; |
297 | __sas_task_abort(task); | |
298 | } | |
1c50dc83 | 299 | } |
338ec570 DW |
300 | } |
301 | ||
82ef04fb | 302 | static int sas_ata_scr_write(struct ata_link *link, unsigned int sc_reg_in, |
338ec570 DW |
303 | u32 val) |
304 | { | |
82ef04fb | 305 | struct domain_device *dev = link->ap->private_data; |
338ec570 | 306 | |
cadbd4a5 | 307 | SAS_DPRINTK("STUB %s\n", __func__); |
338ec570 DW |
308 | switch (sc_reg_in) { |
309 | case SCR_STATUS: | |
310 | dev->sata_dev.sstatus = val; | |
311 | break; | |
312 | case SCR_CONTROL: | |
313 | dev->sata_dev.scontrol = val; | |
314 | break; | |
315 | case SCR_ERROR: | |
316 | dev->sata_dev.serror = val; | |
317 | break; | |
318 | case SCR_ACTIVE: | |
9af5c9c9 | 319 | dev->sata_dev.ap->link.sactive = val; |
338ec570 | 320 | break; |
110dd8f1 JB |
321 | default: |
322 | return -EINVAL; | |
338ec570 | 323 | } |
110dd8f1 | 324 | return 0; |
338ec570 DW |
325 | } |
326 | ||
82ef04fb | 327 | static int sas_ata_scr_read(struct ata_link *link, unsigned int sc_reg_in, |
110dd8f1 | 328 | u32 *val) |
338ec570 | 329 | { |
82ef04fb | 330 | struct domain_device *dev = link->ap->private_data; |
338ec570 | 331 | |
cadbd4a5 | 332 | SAS_DPRINTK("STUB %s\n", __func__); |
338ec570 DW |
333 | switch (sc_reg_in) { |
334 | case SCR_STATUS: | |
110dd8f1 JB |
335 | *val = dev->sata_dev.sstatus; |
336 | return 0; | |
338ec570 | 337 | case SCR_CONTROL: |
110dd8f1 JB |
338 | *val = dev->sata_dev.scontrol; |
339 | return 0; | |
338ec570 | 340 | case SCR_ERROR: |
110dd8f1 JB |
341 | *val = dev->sata_dev.serror; |
342 | return 0; | |
338ec570 | 343 | case SCR_ACTIVE: |
9af5c9c9 | 344 | *val = dev->sata_dev.ap->link.sactive; |
110dd8f1 | 345 | return 0; |
338ec570 | 346 | default: |
110dd8f1 | 347 | return -EINVAL; |
338ec570 DW |
348 | } |
349 | } | |
350 | ||
351 | static struct ata_port_operations sas_sata_ops = { | |
338ec570 DW |
352 | .phy_reset = sas_ata_phy_reset, |
353 | .post_internal_cmd = sas_ata_post_internal, | |
f0ad30d3 | 354 | .qc_defer = ata_std_qc_defer, |
338ec570 DW |
355 | .qc_prep = ata_noop_qc_prep, |
356 | .qc_issue = sas_ata_qc_issue, | |
4c9bf4e7 | 357 | .qc_fill_rtf = sas_ata_qc_fill_rtf, |
338ec570 DW |
358 | .port_start = ata_sas_port_start, |
359 | .port_stop = ata_sas_port_stop, | |
360 | .scr_read = sas_ata_scr_read, | |
361 | .scr_write = sas_ata_scr_write | |
362 | }; | |
363 | ||
364 | static struct ata_port_info sata_port_info = { | |
365 | .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | | |
366 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, | |
367 | .pio_mask = 0x1f, /* PIO0-4 */ | |
368 | .mwdma_mask = 0x07, /* MWDMA0-2 */ | |
369 | .udma_mask = ATA_UDMA6, | |
370 | .port_ops = &sas_sata_ops | |
371 | }; | |
372 | ||
373 | int sas_ata_init_host_and_port(struct domain_device *found_dev, | |
374 | struct scsi_target *starget) | |
375 | { | |
376 | struct Scsi_Host *shost = dev_to_shost(&starget->dev); | |
377 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); | |
378 | struct ata_port *ap; | |
379 | ||
380 | ata_host_init(&found_dev->sata_dev.ata_host, | |
1d1bbee6 | 381 | ha->dev, |
338ec570 DW |
382 | sata_port_info.flags, |
383 | &sas_sata_ops); | |
384 | ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, | |
385 | &sata_port_info, | |
386 | shost); | |
387 | if (!ap) { | |
388 | SAS_DPRINTK("ata_sas_port_alloc failed.\n"); | |
389 | return -ENODEV; | |
390 | } | |
391 | ||
392 | ap->private_data = found_dev; | |
393 | ap->cbl = ATA_CBL_SATA; | |
394 | ap->scsi_host = shost; | |
395 | found_dev->sata_dev.ap = ap; | |
396 | ||
397 | return 0; | |
398 | } | |
3a2755af DW |
399 | |
400 | void sas_ata_task_abort(struct sas_task *task) | |
401 | { | |
402 | struct ata_queued_cmd *qc = task->uldd_task; | |
403 | struct completion *waiting; | |
404 | ||
405 | /* Bounce SCSI-initiated commands to the SCSI EH */ | |
406 | if (qc->scsicmd) { | |
1b4d0d8e JB |
407 | struct request_queue *q = qc->scsicmd->device->request_queue; |
408 | unsigned long flags; | |
409 | ||
70b25f89 | 410 | spin_lock_irqsave(q->queue_lock, flags); |
242f9dcb | 411 | blk_abort_request(qc->scsicmd->request); |
70b25f89 | 412 | spin_unlock_irqrestore(q->queue_lock, flags); |
3a2755af DW |
413 | scsi_schedule_eh(qc->scsicmd->device->host); |
414 | return; | |
415 | } | |
416 | ||
417 | /* Internal command, fake a timeout and complete. */ | |
418 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
419 | qc->flags |= ATA_QCFLAG_FAILED; | |
420 | qc->err_mask |= AC_ERR_TIMEOUT; | |
421 | waiting = qc->private_data; | |
422 | complete(waiting); | |
423 | } | |
b9142174 JB |
424 | |
425 | static void sas_task_timedout(unsigned long _task) | |
426 | { | |
427 | struct sas_task *task = (void *) _task; | |
428 | unsigned long flags; | |
429 | ||
430 | spin_lock_irqsave(&task->task_state_lock, flags); | |
431 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
432 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
433 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
434 | ||
435 | complete(&task->completion); | |
436 | } | |
437 | ||
438 | static void sas_disc_task_done(struct sas_task *task) | |
439 | { | |
440 | if (!del_timer(&task->timer)) | |
441 | return; | |
442 | complete(&task->completion); | |
443 | } | |
444 | ||
445 | #define SAS_DEV_TIMEOUT 10 | |
446 | ||
447 | /** | |
448 | * sas_execute_task -- Basic task processing for discovery | |
449 | * @task: the task to be executed | |
450 | * @buffer: pointer to buffer to do I/O | |
451 | * @size: size of @buffer | |
1d1bbee6 | 452 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
453 | */ |
454 | static int sas_execute_task(struct sas_task *task, void *buffer, int size, | |
1d1bbee6 | 455 | enum dma_data_direction dma_dir) |
b9142174 JB |
456 | { |
457 | int res = 0; | |
458 | struct scatterlist *scatter = NULL; | |
459 | struct task_status_struct *ts = &task->task_status; | |
460 | int num_scatter = 0; | |
461 | int retries = 0; | |
462 | struct sas_internal *i = | |
463 | to_sas_internal(task->dev->port->ha->core.shost->transportt); | |
464 | ||
1d1bbee6 | 465 | if (dma_dir != DMA_NONE) { |
b9142174 JB |
466 | scatter = kzalloc(sizeof(*scatter), GFP_KERNEL); |
467 | if (!scatter) | |
468 | goto out; | |
469 | ||
470 | sg_init_one(scatter, buffer, size); | |
471 | num_scatter = 1; | |
472 | } | |
473 | ||
474 | task->task_proto = task->dev->tproto; | |
475 | task->scatter = scatter; | |
476 | task->num_scatter = num_scatter; | |
477 | task->total_xfer_len = size; | |
1d1bbee6 | 478 | task->data_dir = dma_dir; |
b9142174 | 479 | task->task_done = sas_disc_task_done; |
1d1bbee6 | 480 | if (dma_dir != DMA_NONE && |
b9142174 | 481 | sas_protocol_ata(task->task_proto)) { |
1d1bbee6 | 482 | task->num_scatter = dma_map_sg(task->dev->port->ha->dev, |
b9142174 JB |
483 | task->scatter, |
484 | task->num_scatter, | |
485 | task->data_dir); | |
486 | } | |
487 | ||
488 | for (retries = 0; retries < 5; retries++) { | |
489 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
490 | init_completion(&task->completion); | |
491 | ||
492 | task->timer.data = (unsigned long) task; | |
493 | task->timer.function = sas_task_timedout; | |
494 | task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ; | |
495 | add_timer(&task->timer); | |
496 | ||
497 | res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); | |
498 | if (res) { | |
499 | del_timer(&task->timer); | |
500 | SAS_DPRINTK("executing SAS discovery task failed:%d\n", | |
501 | res); | |
502 | goto ex_err; | |
503 | } | |
504 | wait_for_completion(&task->completion); | |
32e8ae36 | 505 | res = -ECOMM; |
b9142174 JB |
506 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
507 | int res2; | |
508 | SAS_DPRINTK("task aborted, flags:0x%x\n", | |
509 | task->task_state_flags); | |
510 | res2 = i->dft->lldd_abort_task(task); | |
511 | SAS_DPRINTK("came back from abort task\n"); | |
512 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
513 | if (res2 == TMF_RESP_FUNC_COMPLETE) | |
514 | continue; /* Retry the task */ | |
515 | else | |
516 | goto ex_err; | |
517 | } | |
518 | } | |
df64d3ca JB |
519 | if (task->task_status.stat == SAM_STAT_BUSY || |
520 | task->task_status.stat == SAM_STAT_TASK_SET_FULL || | |
b9142174 JB |
521 | task->task_status.stat == SAS_QUEUE_FULL) { |
522 | SAS_DPRINTK("task: q busy, sleeping...\n"); | |
523 | schedule_timeout_interruptible(HZ); | |
df64d3ca | 524 | } else if (task->task_status.stat == SAM_STAT_CHECK_CONDITION) { |
b9142174 JB |
525 | struct scsi_sense_hdr shdr; |
526 | ||
527 | if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size, | |
528 | &shdr)) { | |
529 | SAS_DPRINTK("couldn't normalize sense\n"); | |
530 | continue; | |
531 | } | |
532 | if ((shdr.sense_key == 6 && shdr.asc == 0x29) || | |
533 | (shdr.sense_key == 2 && shdr.asc == 4 && | |
534 | shdr.ascq == 1)) { | |
535 | SAS_DPRINTK("device %016llx LUN: %016llx " | |
536 | "powering up or not ready yet, " | |
537 | "sleeping...\n", | |
538 | SAS_ADDR(task->dev->sas_addr), | |
539 | SAS_ADDR(task->ssp_task.LUN)); | |
540 | ||
541 | schedule_timeout_interruptible(5*HZ); | |
542 | } else if (shdr.sense_key == 1) { | |
543 | res = 0; | |
544 | break; | |
545 | } else if (shdr.sense_key == 5) { | |
546 | break; | |
547 | } else { | |
548 | SAS_DPRINTK("dev %016llx LUN: %016llx " | |
549 | "sense key:0x%x ASC:0x%x ASCQ:0x%x" | |
550 | "\n", | |
551 | SAS_ADDR(task->dev->sas_addr), | |
552 | SAS_ADDR(task->ssp_task.LUN), | |
553 | shdr.sense_key, | |
554 | shdr.asc, shdr.ascq); | |
555 | } | |
556 | } else if (task->task_status.resp != SAS_TASK_COMPLETE || | |
df64d3ca | 557 | task->task_status.stat != SAM_STAT_GOOD) { |
b9142174 JB |
558 | SAS_DPRINTK("task finished with resp:0x%x, " |
559 | "stat:0x%x\n", | |
560 | task->task_status.resp, | |
561 | task->task_status.stat); | |
562 | goto ex_err; | |
563 | } else { | |
564 | res = 0; | |
565 | break; | |
566 | } | |
567 | } | |
568 | ex_err: | |
1d1bbee6 | 569 | if (dma_dir != DMA_NONE) { |
b9142174 | 570 | if (sas_protocol_ata(task->task_proto)) |
1d1bbee6 | 571 | dma_unmap_sg(task->dev->port->ha->dev, |
b9142174 JB |
572 | task->scatter, task->num_scatter, |
573 | task->data_dir); | |
574 | kfree(scatter); | |
575 | } | |
576 | out: | |
577 | return res; | |
578 | } | |
579 | ||
580 | /* ---------- SATA ---------- */ | |
581 | ||
582 | static void sas_get_ata_command_set(struct domain_device *dev) | |
583 | { | |
584 | struct dev_to_host_fis *fis = | |
585 | (struct dev_to_host_fis *) dev->frame_rcvd; | |
586 | ||
587 | if ((fis->sector_count == 1 && /* ATA */ | |
588 | fis->lbal == 1 && | |
589 | fis->lbam == 0 && | |
590 | fis->lbah == 0 && | |
591 | fis->device == 0) | |
592 | || | |
593 | (fis->sector_count == 0 && /* CE-ATA (mATA) */ | |
594 | fis->lbal == 0 && | |
595 | fis->lbam == 0xCE && | |
596 | fis->lbah == 0xAA && | |
597 | (fis->device & ~0x10) == 0)) | |
598 | ||
599 | dev->sata_dev.command_set = ATA_COMMAND_SET; | |
600 | ||
601 | else if ((fis->interrupt_reason == 1 && /* ATAPI */ | |
602 | fis->lbal == 1 && | |
603 | fis->byte_count_low == 0x14 && | |
604 | fis->byte_count_high == 0xEB && | |
605 | (fis->device & ~0x10) == 0)) | |
606 | ||
607 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
608 | ||
609 | else if ((fis->sector_count == 1 && /* SEMB */ | |
610 | fis->lbal == 1 && | |
611 | fis->lbam == 0x3C && | |
612 | fis->lbah == 0xC3 && | |
613 | fis->device == 0) | |
614 | || | |
615 | (fis->interrupt_reason == 1 && /* SATA PM */ | |
616 | fis->lbal == 1 && | |
617 | fis->byte_count_low == 0x69 && | |
618 | fis->byte_count_high == 0x96 && | |
619 | (fis->device & ~0x10) == 0)) | |
620 | ||
621 | /* Treat it as a superset? */ | |
622 | dev->sata_dev.command_set = ATAPI_COMMAND_SET; | |
623 | } | |
624 | ||
625 | /** | |
626 | * sas_issue_ata_cmd -- Basic SATA command processing for discovery | |
627 | * @dev: the device to send the command to | |
628 | * @command: the command register | |
629 | * @features: the features register | |
630 | * @buffer: pointer to buffer to do I/O | |
631 | * @size: size of @buffer | |
1d1bbee6 | 632 | * @dma_dir: DMA direction. DMA_xxx |
b9142174 JB |
633 | */ |
634 | static int sas_issue_ata_cmd(struct domain_device *dev, u8 command, | |
635 | u8 features, void *buffer, int size, | |
1d1bbee6 | 636 | enum dma_data_direction dma_dir) |
b9142174 JB |
637 | { |
638 | int res = 0; | |
639 | struct sas_task *task; | |
640 | struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *) | |
641 | &dev->frame_rcvd[0]; | |
642 | ||
643 | res = -ENOMEM; | |
644 | task = sas_alloc_task(GFP_KERNEL); | |
645 | if (!task) | |
646 | goto out; | |
647 | ||
648 | task->dev = dev; | |
649 | ||
650 | task->ata_task.fis.fis_type = 0x27; | |
651 | task->ata_task.fis.command = command; | |
652 | task->ata_task.fis.features = features; | |
653 | task->ata_task.fis.device = d2h_fis->device; | |
654 | task->ata_task.retry_count = 1; | |
655 | ||
1d1bbee6 | 656 | res = sas_execute_task(task, buffer, size, dma_dir); |
b9142174 JB |
657 | |
658 | sas_free_task(task); | |
659 | out: | |
660 | return res; | |
661 | } | |
662 | ||
b9142174 JB |
663 | #define ATA_IDENTIFY_DEV 0xEC |
664 | #define ATA_IDENTIFY_PACKET_DEV 0xA1 | |
665 | #define ATA_SET_FEATURES 0xEF | |
666 | #define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07 | |
667 | ||
668 | /** | |
669 | * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV) | |
670 | * @dev: STP/SATA device of interest (ATA/ATAPI) | |
671 | * | |
672 | * The LLDD has already been notified of this device, so that we can | |
673 | * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY | |
674 | * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its | |
675 | * performance for this device. | |
676 | */ | |
677 | static int sas_discover_sata_dev(struct domain_device *dev) | |
678 | { | |
679 | int res; | |
680 | __le16 *identify_x; | |
681 | u8 command; | |
682 | ||
683 | identify_x = kzalloc(512, GFP_KERNEL); | |
684 | if (!identify_x) | |
685 | return -ENOMEM; | |
686 | ||
687 | if (dev->sata_dev.command_set == ATA_COMMAND_SET) { | |
688 | dev->sata_dev.identify_device = identify_x; | |
689 | command = ATA_IDENTIFY_DEV; | |
690 | } else { | |
691 | dev->sata_dev.identify_packet_device = identify_x; | |
692 | command = ATA_IDENTIFY_PACKET_DEV; | |
693 | } | |
694 | ||
695 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 696 | DMA_FROM_DEVICE); |
b9142174 JB |
697 | if (res) |
698 | goto out_err; | |
699 | ||
700 | /* lives on the media? */ | |
701 | if (le16_to_cpu(identify_x[0]) & 4) { | |
702 | /* incomplete response */ | |
703 | SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to " | |
704 | "dev %llx\n", SAS_ADDR(dev->sas_addr)); | |
17b7a8de | 705 | if (!(identify_x[83] & cpu_to_le16(1<<6))) |
b9142174 JB |
706 | goto cont1; |
707 | res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES, | |
708 | ATA_FEATURE_PUP_STBY_SPIN_UP, | |
1d1bbee6 | 709 | NULL, 0, DMA_NONE); |
b9142174 JB |
710 | if (res) |
711 | goto cont1; | |
712 | ||
713 | schedule_timeout_interruptible(5*HZ); /* More time? */ | |
714 | res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512, | |
1d1bbee6 | 715 | DMA_FROM_DEVICE); |
b9142174 JB |
716 | if (res) |
717 | goto out_err; | |
718 | } | |
719 | cont1: | |
b9142174 JB |
720 | /* XXX Hint: register this SATA device with SATL. |
721 | When this returns, dev->sata_dev->lu is alive and | |
722 | present. | |
723 | sas_satl_register_dev(dev); | |
724 | */ | |
725 | ||
726 | sas_fill_in_rphy(dev, dev->rphy); | |
727 | ||
728 | return 0; | |
729 | out_err: | |
730 | dev->sata_dev.identify_packet_device = NULL; | |
731 | dev->sata_dev.identify_device = NULL; | |
732 | kfree(identify_x); | |
733 | return res; | |
734 | } | |
735 | ||
736 | static int sas_discover_sata_pm(struct domain_device *dev) | |
737 | { | |
738 | return -ENODEV; | |
739 | } | |
740 | ||
741 | /** | |
742 | * sas_discover_sata -- discover an STP/SATA domain device | |
743 | * @dev: pointer to struct domain_device of interest | |
744 | * | |
745 | * First we notify the LLDD of this device, so we can send frames to | |
746 | * it. Then depending on the type of device we call the appropriate | |
747 | * discover functions. Once device discover is done, we notify the | |
748 | * LLDD so that it can fine-tune its parameters for the device, by | |
749 | * removing it and then adding it. That is, the second time around, | |
750 | * the driver would have certain fields, that it is looking at, set. | |
751 | * Finally we initialize the kobj so that the device can be added to | |
752 | * the system at registration time. Devices directly attached to a HA | |
753 | * port, have no parents. All other devices do, and should have their | |
754 | * "parent" pointer set appropriately before calling this function. | |
755 | */ | |
756 | int sas_discover_sata(struct domain_device *dev) | |
757 | { | |
758 | int res; | |
759 | ||
760 | sas_get_ata_command_set(dev); | |
761 | ||
762 | res = sas_notify_lldd_dev_found(dev); | |
763 | if (res) | |
764 | return res; | |
765 | ||
766 | switch (dev->dev_type) { | |
767 | case SATA_DEV: | |
768 | res = sas_discover_sata_dev(dev); | |
769 | break; | |
770 | case SATA_PM: | |
771 | res = sas_discover_sata_pm(dev); | |
772 | break; | |
773 | default: | |
774 | break; | |
775 | } | |
776 | sas_notify_lldd_dev_gone(dev); | |
777 | if (!res) { | |
778 | sas_notify_lldd_dev_found(dev); | |
779 | res = sas_rphy_add(dev->rphy); | |
780 | } | |
781 | ||
782 | return res; | |
783 | } |