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authorJames Bottomley <James.Bottomley@steeleye.com>2007-07-22 14:15:55 -0400
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-22 14:23:13 -0400
commitb91421749a1840148d8c81637c03c0ace3f35269 (patch)
treee3e2f59f9a14051c8277793f214db094380d3ebb /drivers/scsi/libsas/sas_discover.c
parent41e1703b9b88cf9b5e91cdd2f7dcded3ec3917cb (diff)
[SCSI] libsas: make ATA functions selectable by a config option
Not everyone wants libsas automatically to pull in libata. This patch makes the behaviour configurable, so you can build libsas with or without ATA support. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/libsas/sas_discover.c')
-rw-r--r--drivers/scsi/libsas/sas_discover.c397
1 files changed, 3 insertions, 394 deletions
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 328a78ad6aa0..6ac9f61d006a 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -55,161 +55,6 @@ void sas_init_dev(struct domain_device *dev)
55 } 55 }
56} 56}
57 57
58static void sas_task_timedout(unsigned long _task)
59{
60 struct sas_task *task = (void *) _task;
61 unsigned long flags;
62
63 spin_lock_irqsave(&task->task_state_lock, flags);
64 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
65 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
66 spin_unlock_irqrestore(&task->task_state_lock, flags);
67
68 complete(&task->completion);
69}
70
71static void sas_disc_task_done(struct sas_task *task)
72{
73 if (!del_timer(&task->timer))
74 return;
75 complete(&task->completion);
76}
77
78#define SAS_DEV_TIMEOUT 10
79
80/**
81 * sas_execute_task -- Basic task processing for discovery
82 * @task: the task to be executed
83 * @buffer: pointer to buffer to do I/O
84 * @size: size of @buffer
85 * @pci_dma_dir: PCI_DMA_...
86 */
87static int sas_execute_task(struct sas_task *task, void *buffer, int size,
88 int pci_dma_dir)
89{
90 int res = 0;
91 struct scatterlist *scatter = NULL;
92 struct task_status_struct *ts = &task->task_status;
93 int num_scatter = 0;
94 int retries = 0;
95 struct sas_internal *i =
96 to_sas_internal(task->dev->port->ha->core.shost->transportt);
97
98 if (pci_dma_dir != PCI_DMA_NONE) {
99 scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
100 if (!scatter)
101 goto out;
102
103 sg_init_one(scatter, buffer, size);
104 num_scatter = 1;
105 }
106
107 task->task_proto = task->dev->tproto;
108 task->scatter = scatter;
109 task->num_scatter = num_scatter;
110 task->total_xfer_len = size;
111 task->data_dir = pci_dma_dir;
112 task->task_done = sas_disc_task_done;
113 if (pci_dma_dir != PCI_DMA_NONE &&
114 sas_protocol_ata(task->task_proto)) {
115 task->num_scatter = pci_map_sg(task->dev->port->ha->pcidev,
116 task->scatter,
117 task->num_scatter,
118 task->data_dir);
119 }
120
121 for (retries = 0; retries < 5; retries++) {
122 task->task_state_flags = SAS_TASK_STATE_PENDING;
123 init_completion(&task->completion);
124
125 task->timer.data = (unsigned long) task;
126 task->timer.function = sas_task_timedout;
127 task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
128 add_timer(&task->timer);
129
130 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
131 if (res) {
132 del_timer(&task->timer);
133 SAS_DPRINTK("executing SAS discovery task failed:%d\n",
134 res);
135 goto ex_err;
136 }
137 wait_for_completion(&task->completion);
138 res = -ETASK;
139 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
140 int res2;
141 SAS_DPRINTK("task aborted, flags:0x%x\n",
142 task->task_state_flags);
143 res2 = i->dft->lldd_abort_task(task);
144 SAS_DPRINTK("came back from abort task\n");
145 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
146 if (res2 == TMF_RESP_FUNC_COMPLETE)
147 continue; /* Retry the task */
148 else
149 goto ex_err;
150 }
151 }
152 if (task->task_status.stat == SAM_BUSY ||
153 task->task_status.stat == SAM_TASK_SET_FULL ||
154 task->task_status.stat == SAS_QUEUE_FULL) {
155 SAS_DPRINTK("task: q busy, sleeping...\n");
156 schedule_timeout_interruptible(HZ);
157 } else if (task->task_status.stat == SAM_CHECK_COND) {
158 struct scsi_sense_hdr shdr;
159
160 if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
161 &shdr)) {
162 SAS_DPRINTK("couldn't normalize sense\n");
163 continue;
164 }
165 if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
166 (shdr.sense_key == 2 && shdr.asc == 4 &&
167 shdr.ascq == 1)) {
168 SAS_DPRINTK("device %016llx LUN: %016llx "
169 "powering up or not ready yet, "
170 "sleeping...\n",
171 SAS_ADDR(task->dev->sas_addr),
172 SAS_ADDR(task->ssp_task.LUN));
173
174 schedule_timeout_interruptible(5*HZ);
175 } else if (shdr.sense_key == 1) {
176 res = 0;
177 break;
178 } else if (shdr.sense_key == 5) {
179 break;
180 } else {
181 SAS_DPRINTK("dev %016llx LUN: %016llx "
182 "sense key:0x%x ASC:0x%x ASCQ:0x%x"
183 "\n",
184 SAS_ADDR(task->dev->sas_addr),
185 SAS_ADDR(task->ssp_task.LUN),
186 shdr.sense_key,
187 shdr.asc, shdr.ascq);
188 }
189 } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
190 task->task_status.stat != SAM_GOOD) {
191 SAS_DPRINTK("task finished with resp:0x%x, "
192 "stat:0x%x\n",
193 task->task_status.resp,
194 task->task_status.stat);
195 goto ex_err;
196 } else {
197 res = 0;
198 break;
199 }
200 }
201ex_err:
202 if (pci_dma_dir != PCI_DMA_NONE) {
203 if (sas_protocol_ata(task->task_proto))
204 pci_unmap_sg(task->dev->port->ha->pcidev,
205 task->scatter, task->num_scatter,
206 task->data_dir);
207 kfree(scatter);
208 }
209out:
210 return res;
211}
212
213/* ---------- Domain device discovery ---------- */ 58/* ---------- Domain device discovery ---------- */
214 59
215/** 60/**
@@ -313,202 +158,6 @@ static int sas_get_port_device(struct asd_sas_port *port)
313 158
314/* ---------- Discover and Revalidate ---------- */ 159/* ---------- Discover and Revalidate ---------- */
315 160
316/* ---------- SATA ---------- */
317
318static void sas_get_ata_command_set(struct domain_device *dev)
319{
320 struct dev_to_host_fis *fis =
321 (struct dev_to_host_fis *) dev->frame_rcvd;
322
323 if ((fis->sector_count == 1 && /* ATA */
324 fis->lbal == 1 &&
325 fis->lbam == 0 &&
326 fis->lbah == 0 &&
327 fis->device == 0)
328 ||
329 (fis->sector_count == 0 && /* CE-ATA (mATA) */
330 fis->lbal == 0 &&
331 fis->lbam == 0xCE &&
332 fis->lbah == 0xAA &&
333 (fis->device & ~0x10) == 0))
334
335 dev->sata_dev.command_set = ATA_COMMAND_SET;
336
337 else if ((fis->interrupt_reason == 1 && /* ATAPI */
338 fis->lbal == 1 &&
339 fis->byte_count_low == 0x14 &&
340 fis->byte_count_high == 0xEB &&
341 (fis->device & ~0x10) == 0))
342
343 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
344
345 else if ((fis->sector_count == 1 && /* SEMB */
346 fis->lbal == 1 &&
347 fis->lbam == 0x3C &&
348 fis->lbah == 0xC3 &&
349 fis->device == 0)
350 ||
351 (fis->interrupt_reason == 1 && /* SATA PM */
352 fis->lbal == 1 &&
353 fis->byte_count_low == 0x69 &&
354 fis->byte_count_high == 0x96 &&
355 (fis->device & ~0x10) == 0))
356
357 /* Treat it as a superset? */
358 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
359}
360
361/**
362 * sas_issue_ata_cmd -- Basic SATA command processing for discovery
363 * @dev: the device to send the command to
364 * @command: the command register
365 * @features: the features register
366 * @buffer: pointer to buffer to do I/O
367 * @size: size of @buffer
368 * @pci_dma_dir: PCI_DMA_...
369 */
370static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
371 u8 features, void *buffer, int size,
372 int pci_dma_dir)
373{
374 int res = 0;
375 struct sas_task *task;
376 struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
377 &dev->frame_rcvd[0];
378
379 res = -ENOMEM;
380 task = sas_alloc_task(GFP_KERNEL);
381 if (!task)
382 goto out;
383
384 task->dev = dev;
385
386 task->ata_task.fis.fis_type = 0x27;
387 task->ata_task.fis.command = command;
388 task->ata_task.fis.features = features;
389 task->ata_task.fis.device = d2h_fis->device;
390 task->ata_task.retry_count = 1;
391
392 res = sas_execute_task(task, buffer, size, pci_dma_dir);
393
394 sas_free_task(task);
395out:
396 return res;
397}
398
399static void sas_sata_propagate_sas_addr(struct domain_device *dev)
400{
401 unsigned long flags;
402 struct asd_sas_port *port = dev->port;
403 struct asd_sas_phy *phy;
404
405 BUG_ON(dev->parent);
406
407 memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
408 spin_lock_irqsave(&port->phy_list_lock, flags);
409 list_for_each_entry(phy, &port->phy_list, port_phy_el)
410 memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
411 spin_unlock_irqrestore(&port->phy_list_lock, flags);
412}
413
414#define ATA_IDENTIFY_DEV 0xEC
415#define ATA_IDENTIFY_PACKET_DEV 0xA1
416#define ATA_SET_FEATURES 0xEF
417#define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
418
419/**
420 * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
421 * @dev: STP/SATA device of interest (ATA/ATAPI)
422 *
423 * The LLDD has already been notified of this device, so that we can
424 * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
425 * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
426 * performance for this device.
427 */
428static int sas_discover_sata_dev(struct domain_device *dev)
429{
430 int res;
431 __le16 *identify_x;
432 u8 command;
433
434 identify_x = kzalloc(512, GFP_KERNEL);
435 if (!identify_x)
436 return -ENOMEM;
437
438 if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
439 dev->sata_dev.identify_device = identify_x;
440 command = ATA_IDENTIFY_DEV;
441 } else {
442 dev->sata_dev.identify_packet_device = identify_x;
443 command = ATA_IDENTIFY_PACKET_DEV;
444 }
445
446 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
447 PCI_DMA_FROMDEVICE);
448 if (res)
449 goto out_err;
450
451 /* lives on the media? */
452 if (le16_to_cpu(identify_x[0]) & 4) {
453 /* incomplete response */
454 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
455 "dev %llx\n", SAS_ADDR(dev->sas_addr));
456 if (!le16_to_cpu(identify_x[83] & (1<<6)))
457 goto cont1;
458 res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
459 ATA_FEATURE_PUP_STBY_SPIN_UP,
460 NULL, 0, PCI_DMA_NONE);
461 if (res)
462 goto cont1;
463
464 schedule_timeout_interruptible(5*HZ); /* More time? */
465 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
466 PCI_DMA_FROMDEVICE);
467 if (res)
468 goto out_err;
469 }
470cont1:
471 /* Get WWN */
472 if (dev->port->oob_mode != SATA_OOB_MODE) {
473 memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
474 SAS_ADDR_SIZE);
475 } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
476 (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
477 == 0x5000) {
478 int i;
479
480 for (i = 0; i < 4; i++) {
481 dev->sas_addr[2*i] =
482 (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
483 dev->sas_addr[2*i+1] =
484 le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
485 }
486 }
487 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
488 if (!dev->parent)
489 sas_sata_propagate_sas_addr(dev);
490
491 /* XXX Hint: register this SATA device with SATL.
492 When this returns, dev->sata_dev->lu is alive and
493 present.
494 sas_satl_register_dev(dev);
495 */
496
497 sas_fill_in_rphy(dev, dev->rphy);
498
499 return 0;
500out_err:
501 dev->sata_dev.identify_packet_device = NULL;
502 dev->sata_dev.identify_device = NULL;
503 kfree(identify_x);
504 return res;
505}
506
507static int sas_discover_sata_pm(struct domain_device *dev)
508{
509 return -ENODEV;
510}
511
512int sas_notify_lldd_dev_found(struct domain_device *dev) 161int sas_notify_lldd_dev_found(struct domain_device *dev)
513{ 162{
514 int res = 0; 163 int res = 0;
@@ -541,49 +190,6 @@ void sas_notify_lldd_dev_gone(struct domain_device *dev)
541 190
542/* ---------- Common/dispatchers ---------- */ 191/* ---------- Common/dispatchers ---------- */
543 192
544/**
545 * sas_discover_sata -- discover an STP/SATA domain device
546 * @dev: pointer to struct domain_device of interest
547 *
548 * First we notify the LLDD of this device, so we can send frames to
549 * it. Then depending on the type of device we call the appropriate
550 * discover functions. Once device discover is done, we notify the
551 * LLDD so that it can fine-tune its parameters for the device, by
552 * removing it and then adding it. That is, the second time around,
553 * the driver would have certain fields, that it is looking at, set.
554 * Finally we initialize the kobj so that the device can be added to
555 * the system at registration time. Devices directly attached to a HA
556 * port, have no parents. All other devices do, and should have their
557 * "parent" pointer set appropriately before calling this function.
558 */
559int sas_discover_sata(struct domain_device *dev)
560{
561 int res;
562
563 sas_get_ata_command_set(dev);
564
565 res = sas_notify_lldd_dev_found(dev);
566 if (res)
567 return res;
568
569 switch (dev->dev_type) {
570 case SATA_DEV:
571 res = sas_discover_sata_dev(dev);
572 break;
573 case SATA_PM:
574 res = sas_discover_sata_pm(dev);
575 break;
576 default:
577 break;
578 }
579 sas_notify_lldd_dev_gone(dev);
580 if (!res) {
581 sas_notify_lldd_dev_found(dev);
582 res = sas_rphy_add(dev->rphy);
583 }
584
585 return res;
586}
587 193
588/** 194/**
589 * sas_discover_end_dev -- discover an end device (SSP, etc) 195 * sas_discover_end_dev -- discover an end device (SSP, etc)
@@ -690,11 +296,14 @@ static void sas_discover_domain(struct work_struct *work)
690 case FANOUT_DEV: 296 case FANOUT_DEV:
691 error = sas_discover_root_expander(dev); 297 error = sas_discover_root_expander(dev);
692 break; 298 break;
299#ifdef CONFIG_SCSI_SAS_ATA
693 case SATA_DEV: 300 case SATA_DEV:
694 case SATA_PM: 301 case SATA_PM:
695 error = sas_discover_sata(dev); 302 error = sas_discover_sata(dev);
696 break; 303 break;
304#endif
697 default: 305 default:
306 error = -ENXIO;
698 SAS_DPRINTK("unhandled device %d\n", dev->dev_type); 307 SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
699 break; 308 break;
700 } 309 }
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