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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / ata / libata-scsi.c
blobeb2eb599e602303f1a4cdac487cda3f914cd9d59
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * libata-scsi.c - helper library for ATA
4 *
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
7 * on emails.
8 *
9 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
10 * Copyright 2003-2004 Jeff Garzik
11 *
12 * libata documentation is available via 'make {ps|pdf}docs',
13 * as Documentation/driver-api/libata.rst
14 *
15 * Hardware documentation available from
16 * - http://www.t10.org/
17 * - http://www.t13.org/
18 */
19
20 #include <linux/compat.h>
21 #include <linux/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/blkdev.h>
24 #include <linux/spinlock.h>
25 #include <linux/export.h>
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_cmnd.h>
29 #include <scsi/scsi_eh.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_tcq.h>
32 #include <scsi/scsi_transport.h>
33 #include <linux/libata.h>
34 #include <linux/hdreg.h>
35 #include <linux/uaccess.h>
36 #include <linux/suspend.h>
37 #include <asm/unaligned.h>
38 #include <linux/ioprio.h>
39
40 #include "libata.h"
41 #include "libata-transport.h"
42
43 #define ATA_SCSI_RBUF_SIZE 4096
44
45 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
46 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
47
48 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
49
50 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
51 const struct scsi_device *scsidev);
52 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
53 const struct scsi_device *scsidev);
54
55 #define RW_RECOVERY_MPAGE 0x1
56 #define RW_RECOVERY_MPAGE_LEN 12
57 #define CACHE_MPAGE 0x8
58 #define CACHE_MPAGE_LEN 20
59 #define CONTROL_MPAGE 0xa
60 #define CONTROL_MPAGE_LEN 12
61 #define ALL_MPAGES 0x3f
62 #define ALL_SUB_MPAGES 0xff
63
64
65 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
66 RW_RECOVERY_MPAGE,
67 RW_RECOVERY_MPAGE_LEN - 2,
68 (1 << 7), /* AWRE */
69 0, /* read retry count */
70 0, 0, 0, 0,
71 0, /* write retry count */
72 0, 0, 0
73 };
74
75 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
76 CACHE_MPAGE,
77 CACHE_MPAGE_LEN - 2,
78 0, /* contains WCE, needs to be 0 for logic */
79 0, 0, 0, 0, 0, 0, 0, 0, 0,
80 0, /* contains DRA, needs to be 0 for logic */
81 0, 0, 0, 0, 0, 0, 0
82 };
83
84 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
85 CONTROL_MPAGE,
86 CONTROL_MPAGE_LEN - 2,
87 2, /* DSENSE=0, GLTSD=1 */
88 0, /* [QAM+QERR may be 1, see 05-359r1] */
89 0, 0, 0, 0, 0xff, 0xff,
90 0, 30 /* extended self test time, see 05-359r1 */
91 };
92
93 static const char *ata_lpm_policy_names[] = {
94 [ATA_LPM_UNKNOWN] = "max_performance",
95 [ATA_LPM_MAX_POWER] = "max_performance",
96 [ATA_LPM_MED_POWER] = "medium_power",
97 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
98 [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
99 [ATA_LPM_MIN_POWER] = "min_power",
100 };
101
102 static ssize_t ata_scsi_lpm_store(struct device *device,
103 struct device_attribute *attr,
104 const char *buf, size_t count)
105 {
106 struct Scsi_Host *shost = class_to_shost(device);
107 struct ata_port *ap = ata_shost_to_port(shost);
108 struct ata_link *link;
109 struct ata_device *dev;
110 enum ata_lpm_policy policy;
111 unsigned long flags;
112
113 /* UNKNOWN is internal state, iterate from MAX_POWER */
114 for (policy = ATA_LPM_MAX_POWER;
115 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
116 const char *name = ata_lpm_policy_names[policy];
117
118 if (strncmp(name, buf, strlen(name)) == 0)
119 break;
120 }
121 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
122 return -EINVAL;
123
124 spin_lock_irqsave(ap->lock, flags);
125
126 ata_for_each_link(link, ap, EDGE) {
127 ata_for_each_dev(dev, &ap->link, ENABLED) {
128 if (dev->horkage & ATA_HORKAGE_NOLPM) {
129 count = -EOPNOTSUPP;
130 goto out_unlock;
131 }
132 }
133 }
134
135 ap->target_lpm_policy = policy;
136 ata_port_schedule_eh(ap);
137 out_unlock:
138 spin_unlock_irqrestore(ap->lock, flags);
139 return count;
140 }
141
142 static ssize_t ata_scsi_lpm_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
144 {
145 struct Scsi_Host *shost = class_to_shost(dev);
146 struct ata_port *ap = ata_shost_to_port(shost);
147
148 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
149 return -EINVAL;
150
151 return snprintf(buf, PAGE_SIZE, "%s\n",
152 ata_lpm_policy_names[ap->target_lpm_policy]);
153 }
154 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
155 ata_scsi_lpm_show, ata_scsi_lpm_store);
156 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
157
158 static ssize_t ata_scsi_park_show(struct device *device,
159 struct device_attribute *attr, char *buf)
160 {
161 struct scsi_device *sdev = to_scsi_device(device);
162 struct ata_port *ap;
163 struct ata_link *link;
164 struct ata_device *dev;
165 unsigned long now;
166 unsigned int uninitialized_var(msecs);
167 int rc = 0;
168
169 ap = ata_shost_to_port(sdev->host);
170
171 spin_lock_irq(ap->lock);
172 dev = ata_scsi_find_dev(ap, sdev);
173 if (!dev) {
174 rc = -ENODEV;
175 goto unlock;
176 }
177 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
178 rc = -EOPNOTSUPP;
179 goto unlock;
180 }
181
182 link = dev->link;
183 now = jiffies;
184 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
185 link->eh_context.unloaded_mask & (1 << dev->devno) &&
186 time_after(dev->unpark_deadline, now))
187 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
188 else
189 msecs = 0;
190
191 unlock:
192 spin_unlock_irq(ap->lock);
193
194 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
195 }
196
197 static ssize_t ata_scsi_park_store(struct device *device,
198 struct device_attribute *attr,
199 const char *buf, size_t len)
200 {
201 struct scsi_device *sdev = to_scsi_device(device);
202 struct ata_port *ap;
203 struct ata_device *dev;
204 long int input;
205 unsigned long flags;
206 int rc;
207
208 rc = kstrtol(buf, 10, &input);
209 if (rc)
210 return rc;
211 if (input < -2)
212 return -EINVAL;
213 if (input > ATA_TMOUT_MAX_PARK) {
214 rc = -EOVERFLOW;
215 input = ATA_TMOUT_MAX_PARK;
216 }
217
218 ap = ata_shost_to_port(sdev->host);
219
220 spin_lock_irqsave(ap->lock, flags);
221 dev = ata_scsi_find_dev(ap, sdev);
222 if (unlikely(!dev)) {
223 rc = -ENODEV;
224 goto unlock;
225 }
226 if (dev->class != ATA_DEV_ATA &&
227 dev->class != ATA_DEV_ZAC) {
228 rc = -EOPNOTSUPP;
229 goto unlock;
230 }
231
232 if (input >= 0) {
233 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
234 rc = -EOPNOTSUPP;
235 goto unlock;
236 }
237
238 dev->unpark_deadline = ata_deadline(jiffies, input);
239 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
240 ata_port_schedule_eh(ap);
241 complete(&ap->park_req_pending);
242 } else {
243 switch (input) {
244 case -1:
245 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
246 break;
247 case -2:
248 dev->flags |= ATA_DFLAG_NO_UNLOAD;
249 break;
250 }
251 }
252 unlock:
253 spin_unlock_irqrestore(ap->lock, flags);
254
255 return rc ? rc : len;
256 }
257 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
258 ata_scsi_park_show, ata_scsi_park_store);
259 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
260
261 static ssize_t ata_ncq_prio_enable_show(struct device *device,
262 struct device_attribute *attr,
263 char *buf)
264 {
265 struct scsi_device *sdev = to_scsi_device(device);
266 struct ata_port *ap;
267 struct ata_device *dev;
268 bool ncq_prio_enable;
269 int rc = 0;
270
271 ap = ata_shost_to_port(sdev->host);
272
273 spin_lock_irq(ap->lock);
274 dev = ata_scsi_find_dev(ap, sdev);
275 if (!dev) {
276 rc = -ENODEV;
277 goto unlock;
278 }
279
280 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
281
282 unlock:
283 spin_unlock_irq(ap->lock);
284
285 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
286 }
287
288 static ssize_t ata_ncq_prio_enable_store(struct device *device,
289 struct device_attribute *attr,
290 const char *buf, size_t len)
291 {
292 struct scsi_device *sdev = to_scsi_device(device);
293 struct ata_port *ap;
294 struct ata_device *dev;
295 long int input;
296 int rc;
297
298 rc = kstrtol(buf, 10, &input);
299 if (rc)
300 return rc;
301 if ((input < 0) || (input > 1))
302 return -EINVAL;
303
304 ap = ata_shost_to_port(sdev->host);
305 dev = ata_scsi_find_dev(ap, sdev);
306 if (unlikely(!dev))
307 return -ENODEV;
308
309 spin_lock_irq(ap->lock);
310 if (input)
311 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
312 else
313 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
314
315 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
316 dev->link->eh_info.flags |= ATA_EHI_QUIET;
317 ata_port_schedule_eh(ap);
318 spin_unlock_irq(ap->lock);
319
320 ata_port_wait_eh(ap);
321
322 if (input) {
323 spin_lock_irq(ap->lock);
324 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
325 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
326 rc = -EIO;
327 }
328 spin_unlock_irq(ap->lock);
329 }
330
331 return rc ? rc : len;
332 }
333
334 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
335 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
336 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
337
338 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
339 u8 sk, u8 asc, u8 ascq)
340 {
341 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
342
343 if (!cmd)
344 return;
345
346 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
347
348 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
349 }
350
351 void ata_scsi_set_sense_information(struct ata_device *dev,
352 struct scsi_cmnd *cmd,
353 const struct ata_taskfile *tf)
354 {
355 u64 information;
356
357 if (!cmd)
358 return;
359
360 information = ata_tf_read_block(tf, dev);
361 if (information == U64_MAX)
362 return;
363
364 scsi_set_sense_information(cmd->sense_buffer,
365 SCSI_SENSE_BUFFERSIZE, information);
366 }
367
368 static void ata_scsi_set_invalid_field(struct ata_device *dev,
369 struct scsi_cmnd *cmd, u16 field, u8 bit)
370 {
371 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
372 /* "Invalid field in CDB" */
373 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
374 field, bit, 1);
375 }
376
377 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
378 struct scsi_cmnd *cmd, u16 field)
379 {
380 /* "Invalid field in parameter list" */
381 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
382 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
383 field, 0xff, 0);
384 }
385
386 static ssize_t
387 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
388 const char *buf, size_t count)
389 {
390 struct Scsi_Host *shost = class_to_shost(dev);
391 struct ata_port *ap = ata_shost_to_port(shost);
392 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
393 return ap->ops->em_store(ap, buf, count);
394 return -EINVAL;
395 }
396
397 static ssize_t
398 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
399 char *buf)
400 {
401 struct Scsi_Host *shost = class_to_shost(dev);
402 struct ata_port *ap = ata_shost_to_port(shost);
403
404 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
405 return ap->ops->em_show(ap, buf);
406 return -EINVAL;
407 }
408 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
409 ata_scsi_em_message_show, ata_scsi_em_message_store);
410 EXPORT_SYMBOL_GPL(dev_attr_em_message);
411
412 static ssize_t
413 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
414 char *buf)
415 {
416 struct Scsi_Host *shost = class_to_shost(dev);
417 struct ata_port *ap = ata_shost_to_port(shost);
418
419 return snprintf(buf, 23, "%d\n", ap->em_message_type);
420 }
421 DEVICE_ATTR(em_message_type, S_IRUGO,
422 ata_scsi_em_message_type_show, NULL);
423 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
424
425 static ssize_t
426 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
427 char *buf)
428 {
429 struct scsi_device *sdev = to_scsi_device(dev);
430 struct ata_port *ap = ata_shost_to_port(sdev->host);
431 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
432
433 if (atadev && ap->ops->sw_activity_show &&
434 (ap->flags & ATA_FLAG_SW_ACTIVITY))
435 return ap->ops->sw_activity_show(atadev, buf);
436 return -EINVAL;
437 }
438
439 static ssize_t
440 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
441 const char *buf, size_t count)
442 {
443 struct scsi_device *sdev = to_scsi_device(dev);
444 struct ata_port *ap = ata_shost_to_port(sdev->host);
445 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
446 enum sw_activity val;
447 int rc;
448
449 if (atadev && ap->ops->sw_activity_store &&
450 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
451 val = simple_strtoul(buf, NULL, 0);
452 switch (val) {
453 case OFF: case BLINK_ON: case BLINK_OFF:
454 rc = ap->ops->sw_activity_store(atadev, val);
455 if (!rc)
456 return count;
457 else
458 return rc;
459 }
460 }
461 return -EINVAL;
462 }
463 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
464 ata_scsi_activity_store);
465 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
466
467 struct device_attribute *ata_common_sdev_attrs[] = {
468 &dev_attr_unload_heads,
469 &dev_attr_ncq_prio_enable,
470 NULL
471 };
472 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
473
474 /**
475 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
476 * @sdev: SCSI device for which BIOS geometry is to be determined
477 * @bdev: block device associated with @sdev
478 * @capacity: capacity of SCSI device
479 * @geom: location to which geometry will be output
480 *
481 * Generic bios head/sector/cylinder calculator
482 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
483 * mapping. Some situations may arise where the disk is not
484 * bootable if this is not used.
485 *
486 * LOCKING:
487 * Defined by the SCSI layer. We don't really care.
488 *
489 * RETURNS:
490 * Zero.
491 */
492 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
493 sector_t capacity, int geom[])
494 {
495 geom[0] = 255;
496 geom[1] = 63;
497 sector_div(capacity, 255*63);
498 geom[2] = capacity;
499
500 return 0;
501 }
502
503 /**
504 * ata_scsi_unlock_native_capacity - unlock native capacity
505 * @sdev: SCSI device to adjust device capacity for
506 *
507 * This function is called if a partition on @sdev extends beyond
508 * the end of the device. It requests EH to unlock HPA.
509 *
510 * LOCKING:
511 * Defined by the SCSI layer. Might sleep.
512 */
513 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
514 {
515 struct ata_port *ap = ata_shost_to_port(sdev->host);
516 struct ata_device *dev;
517 unsigned long flags;
518
519 spin_lock_irqsave(ap->lock, flags);
520
521 dev = ata_scsi_find_dev(ap, sdev);
522 if (dev && dev->n_sectors < dev->n_native_sectors) {
523 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
524 dev->link->eh_info.action |= ATA_EH_RESET;
525 ata_port_schedule_eh(ap);
526 }
527
528 spin_unlock_irqrestore(ap->lock, flags);
529 ata_port_wait_eh(ap);
530 }
531
532 /**
533 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
534 * @ap: target port
535 * @sdev: SCSI device to get identify data for
536 * @arg: User buffer area for identify data
537 *
538 * LOCKING:
539 * Defined by the SCSI layer. We don't really care.
540 *
541 * RETURNS:
542 * Zero on success, negative errno on error.
543 */
544 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
545 void __user *arg)
546 {
547 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
548 u16 __user *dst = arg;
549 char buf[40];
550
551 if (!dev)
552 return -ENOMSG;
553
554 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
555 return -EFAULT;
556
557 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
558 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
559 return -EFAULT;
560
561 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
562 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
563 return -EFAULT;
564
565 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
566 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
567 return -EFAULT;
568
569 return 0;
570 }
571
572 /**
573 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
574 * @scsidev: Device to which we are issuing command
575 * @arg: User provided data for issuing command
576 *
577 * LOCKING:
578 * Defined by the SCSI layer. We don't really care.
579 *
580 * RETURNS:
581 * Zero on success, negative errno on error.
582 */
583 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
584 {
585 int rc = 0;
586 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
587 u8 scsi_cmd[MAX_COMMAND_SIZE];
588 u8 args[4], *argbuf = NULL;
589 int argsize = 0;
590 enum dma_data_direction data_dir;
591 struct scsi_sense_hdr sshdr;
592 int cmd_result;
593
594 if (arg == NULL)
595 return -EINVAL;
596
597 if (copy_from_user(args, arg, sizeof(args)))
598 return -EFAULT;
599
600 memset(sensebuf, 0, sizeof(sensebuf));
601 memset(scsi_cmd, 0, sizeof(scsi_cmd));
602
603 if (args[3]) {
604 argsize = ATA_SECT_SIZE * args[3];
605 argbuf = kmalloc(argsize, GFP_KERNEL);
606 if (argbuf == NULL) {
607 rc = -ENOMEM;
608 goto error;
609 }
610
611 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
612 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
613 block count in sector count field */
614 data_dir = DMA_FROM_DEVICE;
615 } else {
616 scsi_cmd[1] = (3 << 1); /* Non-data */
617 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
618 data_dir = DMA_NONE;
619 }
620
621 scsi_cmd[0] = ATA_16;
622
623 scsi_cmd[4] = args[2];
624 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
625 scsi_cmd[6] = args[3];
626 scsi_cmd[8] = args[1];
627 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
628 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
629 } else {
630 scsi_cmd[6] = args[1];
631 }
632 scsi_cmd[14] = args[0];
633
634 /* Good values for timeout and retries? Values below
635 from scsi_ioctl_send_command() for default case... */
636 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
637 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
638
639 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
640 u8 *desc = sensebuf + 8;
641 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
642
643 /* If we set cc then ATA pass-through will cause a
644 * check condition even if no error. Filter that. */
645 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
646 if (sshdr.sense_key == RECOVERED_ERROR &&
647 sshdr.asc == 0 && sshdr.ascq == 0x1d)
648 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
649 }
650
651 /* Send userspace a few ATA registers (same as drivers/ide) */
652 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
653 desc[0] == 0x09) { /* code is "ATA Descriptor" */
654 args[0] = desc[13]; /* status */
655 args[1] = desc[3]; /* error */
656 args[2] = desc[5]; /* sector count (0:7) */
657 if (copy_to_user(arg, args, sizeof(args)))
658 rc = -EFAULT;
659 }
660 }
661
662
663 if (cmd_result) {
664 rc = -EIO;
665 goto error;
666 }
667
668 if ((argbuf)
669 && copy_to_user(arg + sizeof(args), argbuf, argsize))
670 rc = -EFAULT;
671 error:
672 kfree(argbuf);
673 return rc;
674 }
675
676 /**
677 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
678 * @scsidev: Device to which we are issuing command
679 * @arg: User provided data for issuing command
680 *
681 * LOCKING:
682 * Defined by the SCSI layer. We don't really care.
683 *
684 * RETURNS:
685 * Zero on success, negative errno on error.
686 */
687 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
688 {
689 int rc = 0;
690 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
691 u8 scsi_cmd[MAX_COMMAND_SIZE];
692 u8 args[7];
693 struct scsi_sense_hdr sshdr;
694 int cmd_result;
695
696 if (arg == NULL)
697 return -EINVAL;
698
699 if (copy_from_user(args, arg, sizeof(args)))
700 return -EFAULT;
701
702 memset(sensebuf, 0, sizeof(sensebuf));
703 memset(scsi_cmd, 0, sizeof(scsi_cmd));
704 scsi_cmd[0] = ATA_16;
705 scsi_cmd[1] = (3 << 1); /* Non-data */
706 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
707 scsi_cmd[4] = args[1];
708 scsi_cmd[6] = args[2];
709 scsi_cmd[8] = args[3];
710 scsi_cmd[10] = args[4];
711 scsi_cmd[12] = args[5];
712 scsi_cmd[13] = args[6] & 0x4f;
713 scsi_cmd[14] = args[0];
714
715 /* Good values for timeout and retries? Values below
716 from scsi_ioctl_send_command() for default case... */
717 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
718 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
719
720 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
721 u8 *desc = sensebuf + 8;
722 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
723
724 /* If we set cc then ATA pass-through will cause a
725 * check condition even if no error. Filter that. */
726 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
727 if (sshdr.sense_key == RECOVERED_ERROR &&
728 sshdr.asc == 0 && sshdr.ascq == 0x1d)
729 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
730 }
731
732 /* Send userspace ATA registers */
733 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
734 desc[0] == 0x09) {/* code is "ATA Descriptor" */
735 args[0] = desc[13]; /* status */
736 args[1] = desc[3]; /* error */
737 args[2] = desc[5]; /* sector count (0:7) */
738 args[3] = desc[7]; /* lbal */
739 args[4] = desc[9]; /* lbam */
740 args[5] = desc[11]; /* lbah */
741 args[6] = desc[12]; /* select */
742 if (copy_to_user(arg, args, sizeof(args)))
743 rc = -EFAULT;
744 }
745 }
746
747 if (cmd_result) {
748 rc = -EIO;
749 goto error;
750 }
751
752 error:
753 return rc;
754 }
755
756 static int ata_ioc32(struct ata_port *ap)
757 {
758 if (ap->flags & ATA_FLAG_PIO_DMA)
759 return 1;
760 if (ap->pflags & ATA_PFLAG_PIO32)
761 return 1;
762 return 0;
763 }
764
765 /*
766 * This handles both native and compat commands, so anything added
767 * here must have a compatible argument, or check in_compat_syscall()
768 */
769 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
770 unsigned int cmd, void __user *arg)
771 {
772 unsigned long val;
773 int rc = -EINVAL;
774 unsigned long flags;
775
776 switch (cmd) {
777 case HDIO_GET_32BIT:
778 spin_lock_irqsave(ap->lock, flags);
779 val = ata_ioc32(ap);
780 spin_unlock_irqrestore(ap->lock, flags);
781 #ifdef CONFIG_COMPAT
782 if (in_compat_syscall())
783 return put_user(val, (compat_ulong_t __user *)arg);
784 #endif
785 return put_user(val, (unsigned long __user *)arg);
786
787 case HDIO_SET_32BIT:
788 val = (unsigned long) arg;
789 rc = 0;
790 spin_lock_irqsave(ap->lock, flags);
791 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
792 if (val)
793 ap->pflags |= ATA_PFLAG_PIO32;
794 else
795 ap->pflags &= ~ATA_PFLAG_PIO32;
796 } else {
797 if (val != ata_ioc32(ap))
798 rc = -EINVAL;
799 }
800 spin_unlock_irqrestore(ap->lock, flags);
801 return rc;
802
803 case HDIO_GET_IDENTITY:
804 return ata_get_identity(ap, scsidev, arg);
805
806 case HDIO_DRIVE_CMD:
807 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
808 return -EACCES;
809 return ata_cmd_ioctl(scsidev, arg);
810
811 case HDIO_DRIVE_TASK:
812 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
813 return -EACCES;
814 return ata_task_ioctl(scsidev, arg);
815
816 default:
817 rc = -ENOTTY;
818 break;
819 }
820
821 return rc;
822 }
823 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
824
825 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
826 void __user *arg)
827 {
828 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
829 scsidev, cmd, arg);
830 }
831 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
832
833 /**
834 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
835 * @dev: ATA device to which the new command is attached
836 * @cmd: SCSI command that originated this ATA command
837 *
838 * Obtain a reference to an unused ata_queued_cmd structure,
839 * which is the basic libata structure representing a single
840 * ATA command sent to the hardware.
841 *
842 * If a command was available, fill in the SCSI-specific
843 * portions of the structure with information on the
844 * current command.
845 *
846 * LOCKING:
847 * spin_lock_irqsave(host lock)
848 *
849 * RETURNS:
850 * Command allocated, or %NULL if none available.
851 */
852 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
853 struct scsi_cmnd *cmd)
854 {
855 struct ata_queued_cmd *qc;
856
857 qc = ata_qc_new_init(dev, cmd->request->tag);
858 if (qc) {
859 qc->scsicmd = cmd;
860 qc->scsidone = cmd->scsi_done;
861
862 qc->sg = scsi_sglist(cmd);
863 qc->n_elem = scsi_sg_count(cmd);
864
865 if (cmd->request->rq_flags & RQF_QUIET)
866 qc->flags |= ATA_QCFLAG_QUIET;
867 } else {
868 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
869 cmd->scsi_done(cmd);
870 }
871
872 return qc;
873 }
874
875 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
876 {
877 struct scsi_cmnd *scmd = qc->scsicmd;
878
879 qc->extrabytes = scmd->request->extra_len;
880 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
881 }
882
883 /**
884 * ata_dump_status - user friendly display of error info
885 * @id: id of the port in question
886 * @tf: ptr to filled out taskfile
887 *
888 * Decode and dump the ATA error/status registers for the user so
889 * that they have some idea what really happened at the non
890 * make-believe layer.
891 *
892 * LOCKING:
893 * inherited from caller
894 */
895 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
896 {
897 u8 stat = tf->command, err = tf->feature;
898
899 pr_warn("ata%u: status=0x%02x { ", id, stat);
900 if (stat & ATA_BUSY) {
901 pr_cont("Busy }\n"); /* Data is not valid in this case */
902 } else {
903 if (stat & ATA_DRDY) pr_cont("DriveReady ");
904 if (stat & ATA_DF) pr_cont("DeviceFault ");
905 if (stat & ATA_DSC) pr_cont("SeekComplete ");
906 if (stat & ATA_DRQ) pr_cont("DataRequest ");
907 if (stat & ATA_CORR) pr_cont("CorrectedError ");
908 if (stat & ATA_SENSE) pr_cont("Sense ");
909 if (stat & ATA_ERR) pr_cont("Error ");
910 pr_cont("}\n");
911
912 if (err) {
913 pr_warn("ata%u: error=0x%02x { ", id, err);
914 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
915 if (err & ATA_ICRC) {
916 if (err & ATA_ABORTED)
917 pr_cont("BadCRC ");
918 else pr_cont("Sector ");
919 }
920 if (err & ATA_UNC) pr_cont("UncorrectableError ");
921 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
922 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
923 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
924 pr_cont("}\n");
925 }
926 }
927 }
928
929 /**
930 * ata_to_sense_error - convert ATA error to SCSI error
931 * @id: ATA device number
932 * @drv_stat: value contained in ATA status register
933 * @drv_err: value contained in ATA error register
934 * @sk: the sense key we'll fill out
935 * @asc: the additional sense code we'll fill out
936 * @ascq: the additional sense code qualifier we'll fill out
937 * @verbose: be verbose
938 *
939 * Converts an ATA error into a SCSI error. Fill out pointers to
940 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
941 * format sense blocks.
942 *
943 * LOCKING:
944 * spin_lock_irqsave(host lock)
945 */
946 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
947 u8 *asc, u8 *ascq, int verbose)
948 {
949 int i;
950
951 /* Based on the 3ware driver translation table */
952 static const unsigned char sense_table[][4] = {
953 /* BBD|ECC|ID|MAR */
954 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
955 // Device busy Aborted command
956 /* BBD|ECC|ID */
957 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
958 // Device busy Aborted command
959 /* ECC|MC|MARK */
960 {0x61, HARDWARE_ERROR, 0x00, 0x00},
961 // Device fault Hardware error
962 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
963 {0x84, ABORTED_COMMAND, 0x47, 0x00},
964 // Data CRC error SCSI parity error
965 /* MC|ID|ABRT|TRK0|MARK */
966 {0x37, NOT_READY, 0x04, 0x00},
967 // Unit offline Not ready
968 /* MCR|MARK */
969 {0x09, NOT_READY, 0x04, 0x00},
970 // Unrecovered disk error Not ready
971 /* Bad address mark */
972 {0x01, MEDIUM_ERROR, 0x13, 0x00},
973 // Address mark not found for data field
974 /* TRK0 - Track 0 not found */
975 {0x02, HARDWARE_ERROR, 0x00, 0x00},
976 // Hardware error
977 /* Abort: 0x04 is not translated here, see below */
978 /* Media change request */
979 {0x08, NOT_READY, 0x04, 0x00},
980 // FIXME: faking offline
981 /* SRV/IDNF - ID not found */
982 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
983 // Logical address out of range
984 /* MC - Media Changed */
985 {0x20, UNIT_ATTENTION, 0x28, 0x00},
986 // Not ready to ready change, medium may have changed
987 /* ECC - Uncorrectable ECC error */
988 {0x40, MEDIUM_ERROR, 0x11, 0x04},
989 // Unrecovered read error
990 /* BBD - block marked bad */
991 {0x80, MEDIUM_ERROR, 0x11, 0x04},
992 // Block marked bad Medium error, unrecovered read error
993 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
994 };
995 static const unsigned char stat_table[][4] = {
996 /* Must be first because BUSY means no other bits valid */
997 {0x80, ABORTED_COMMAND, 0x47, 0x00},
998 // Busy, fake parity for now
999 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1000 // Device ready, unaligned write command
1001 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1002 // Device fault, internal target failure
1003 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1004 // Timed out in xfer, fake parity for now
1005 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1006 // Recovered ECC error Medium error, recovered
1007 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1008 };
1009
1010 /*
1011 * Is this an error we can process/parse
1012 */
1013 if (drv_stat & ATA_BUSY) {
1014 drv_err = 0; /* Ignore the err bits, they're invalid */
1015 }
1016
1017 if (drv_err) {
1018 /* Look for drv_err */
1019 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1020 /* Look for best matches first */
1021 if ((sense_table[i][0] & drv_err) ==
1022 sense_table[i][0]) {
1023 *sk = sense_table[i][1];
1024 *asc = sense_table[i][2];
1025 *ascq = sense_table[i][3];
1026 goto translate_done;
1027 }
1028 }
1029 }
1030
1031 /*
1032 * Fall back to interpreting status bits. Note that if the drv_err
1033 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1034 * is not descriptive enough.
1035 */
1036 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1037 if (stat_table[i][0] & drv_stat) {
1038 *sk = stat_table[i][1];
1039 *asc = stat_table[i][2];
1040 *ascq = stat_table[i][3];
1041 goto translate_done;
1042 }
1043 }
1044
1045 /*
1046 * We need a sensible error return here, which is tricky, and one
1047 * that won't cause people to do things like return a disk wrongly.
1048 */
1049 *sk = ABORTED_COMMAND;
1050 *asc = 0x00;
1051 *ascq = 0x00;
1052
1053 translate_done:
1054 if (verbose)
1055 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1056 id, drv_stat, drv_err, *sk, *asc, *ascq);
1057 return;
1058 }
1059
1060 /*
1061 * ata_gen_passthru_sense - Generate check condition sense block.
1062 * @qc: Command that completed.
1063 *
1064 * This function is specific to the ATA descriptor format sense
1065 * block specified for the ATA pass through commands. Regardless
1066 * of whether the command errored or not, return a sense
1067 * block. Copy all controller registers into the sense
1068 * block. If there was no error, we get the request from an ATA
1069 * passthrough command, so we use the following sense data:
1070 * sk = RECOVERED ERROR
1071 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1072 *
1073 *
1074 * LOCKING:
1075 * None.
1076 */
1077 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1078 {
1079 struct scsi_cmnd *cmd = qc->scsicmd;
1080 struct ata_taskfile *tf = &qc->result_tf;
1081 unsigned char *sb = cmd->sense_buffer;
1082 unsigned char *desc = sb + 8;
1083 int verbose = qc->ap->ops->error_handler == NULL;
1084 u8 sense_key, asc, ascq;
1085
1086 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1087
1088 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1089
1090 /*
1091 * Use ata_to_sense_error() to map status register bits
1092 * onto sense key, asc & ascq.
1093 */
1094 if (qc->err_mask ||
1095 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1096 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1097 &sense_key, &asc, &ascq, verbose);
1098 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1099 } else {
1100 /*
1101 * ATA PASS-THROUGH INFORMATION AVAILABLE
1102 * Always in descriptor format sense.
1103 */
1104 scsi_build_sense_buffer(1, cmd->sense_buffer,
1105 RECOVERED_ERROR, 0, 0x1D);
1106 }
1107
1108 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1109 u8 len;
1110
1111 /* descriptor format */
1112 len = sb[7];
1113 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1114 if (!desc) {
1115 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1116 return;
1117 sb[7] = len + 14;
1118 desc = sb + 8 + len;
1119 }
1120 desc[0] = 9;
1121 desc[1] = 12;
1122 /*
1123 * Copy registers into sense buffer.
1124 */
1125 desc[2] = 0x00;
1126 desc[3] = tf->feature; /* == error reg */
1127 desc[5] = tf->nsect;
1128 desc[7] = tf->lbal;
1129 desc[9] = tf->lbam;
1130 desc[11] = tf->lbah;
1131 desc[12] = tf->device;
1132 desc[13] = tf->command; /* == status reg */
1133
1134 /*
1135 * Fill in Extend bit, and the high order bytes
1136 * if applicable.
1137 */
1138 if (tf->flags & ATA_TFLAG_LBA48) {
1139 desc[2] |= 0x01;
1140 desc[4] = tf->hob_nsect;
1141 desc[6] = tf->hob_lbal;
1142 desc[8] = tf->hob_lbam;
1143 desc[10] = tf->hob_lbah;
1144 }
1145 } else {
1146 /* Fixed sense format */
1147 desc[0] = tf->feature;
1148 desc[1] = tf->command; /* status */
1149 desc[2] = tf->device;
1150 desc[3] = tf->nsect;
1151 desc[7] = 0;
1152 if (tf->flags & ATA_TFLAG_LBA48) {
1153 desc[8] |= 0x80;
1154 if (tf->hob_nsect)
1155 desc[8] |= 0x40;
1156 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1157 desc[8] |= 0x20;
1158 }
1159 desc[9] = tf->lbal;
1160 desc[10] = tf->lbam;
1161 desc[11] = tf->lbah;
1162 }
1163 }
1164
1165 /**
1166 * ata_gen_ata_sense - generate a SCSI fixed sense block
1167 * @qc: Command that we are erroring out
1168 *
1169 * Generate sense block for a failed ATA command @qc. Descriptor
1170 * format is used to accommodate LBA48 block address.
1171 *
1172 * LOCKING:
1173 * None.
1174 */
1175 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1176 {
1177 struct ata_device *dev = qc->dev;
1178 struct scsi_cmnd *cmd = qc->scsicmd;
1179 struct ata_taskfile *tf = &qc->result_tf;
1180 unsigned char *sb = cmd->sense_buffer;
1181 int verbose = qc->ap->ops->error_handler == NULL;
1182 u64 block;
1183 u8 sense_key, asc, ascq;
1184
1185 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1186
1187 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1188
1189 if (ata_dev_disabled(dev)) {
1190 /* Device disabled after error recovery */
1191 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1192 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1193 return;
1194 }
1195 /* Use ata_to_sense_error() to map status register bits
1196 * onto sense key, asc & ascq.
1197 */
1198 if (qc->err_mask ||
1199 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1200 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1201 &sense_key, &asc, &ascq, verbose);
1202 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1203 } else {
1204 /* Could not decode error */
1205 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1206 tf->command, qc->err_mask);
1207 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1208 return;
1209 }
1210
1211 block = ata_tf_read_block(&qc->result_tf, dev);
1212 if (block == U64_MAX)
1213 return;
1214
1215 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1216 }
1217
1218 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1219 {
1220 sdev->use_10_for_rw = 1;
1221 sdev->use_10_for_ms = 1;
1222 sdev->no_write_same = 1;
1223
1224 /* Schedule policy is determined by ->qc_defer() callback and
1225 * it needs to see every deferred qc. Set dev_blocked to 1 to
1226 * prevent SCSI midlayer from automatically deferring
1227 * requests.
1228 */
1229 sdev->max_device_blocked = 1;
1230 }
1231
1232 /**
1233 * atapi_drain_needed - Check whether data transfer may overflow
1234 * @rq: request to be checked
1235 *
1236 * ATAPI commands which transfer variable length data to host
1237 * might overflow due to application error or hardware bug. This
1238 * function checks whether overflow should be drained and ignored
1239 * for @request.
1240 *
1241 * LOCKING:
1242 * None.
1243 *
1244 * RETURNS:
1245 * 1 if ; otherwise, 0.
1246 */
1247 static int atapi_drain_needed(struct request *rq)
1248 {
1249 if (likely(!blk_rq_is_passthrough(rq)))
1250 return 0;
1251
1252 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1253 return 0;
1254
1255 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1256 }
1257
1258 static int ata_scsi_dev_config(struct scsi_device *sdev,
1259 struct ata_device *dev)
1260 {
1261 struct request_queue *q = sdev->request_queue;
1262
1263 if (!ata_id_has_unload(dev->id))
1264 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1265
1266 /* configure max sectors */
1267 blk_queue_max_hw_sectors(q, dev->max_sectors);
1268
1269 if (dev->class == ATA_DEV_ATAPI) {
1270 void *buf;
1271
1272 sdev->sector_size = ATA_SECT_SIZE;
1273
1274 /* set DMA padding */
1275 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1276
1277 /* configure draining */
1278 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1279 if (!buf) {
1280 ata_dev_err(dev, "drain buffer allocation failed\n");
1281 return -ENOMEM;
1282 }
1283
1284 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1285 } else {
1286 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1287 sdev->manage_start_stop = 1;
1288 }
1289
1290 /*
1291 * ata_pio_sectors() expects buffer for each sector to not cross
1292 * page boundary. Enforce it by requiring buffers to be sector
1293 * aligned, which works iff sector_size is not larger than
1294 * PAGE_SIZE. ATAPI devices also need the alignment as
1295 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1296 */
1297 if (sdev->sector_size > PAGE_SIZE)
1298 ata_dev_warn(dev,
1299 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1300 sdev->sector_size);
1301
1302 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1303
1304 if (dev->flags & ATA_DFLAG_AN)
1305 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1306
1307 if (dev->flags & ATA_DFLAG_NCQ) {
1308 int depth;
1309
1310 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1311 depth = min(ATA_MAX_QUEUE, depth);
1312 scsi_change_queue_depth(sdev, depth);
1313 }
1314
1315 if (dev->flags & ATA_DFLAG_TRUSTED)
1316 sdev->security_supported = 1;
1317
1318 dev->sdev = sdev;
1319 return 0;
1320 }
1321
1322 /**
1323 * ata_scsi_slave_config - Set SCSI device attributes
1324 * @sdev: SCSI device to examine
1325 *
1326 * This is called before we actually start reading
1327 * and writing to the device, to configure certain
1328 * SCSI mid-layer behaviors.
1329 *
1330 * LOCKING:
1331 * Defined by SCSI layer. We don't really care.
1332 */
1333
1334 int ata_scsi_slave_config(struct scsi_device *sdev)
1335 {
1336 struct ata_port *ap = ata_shost_to_port(sdev->host);
1337 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1338 int rc = 0;
1339
1340 ata_scsi_sdev_config(sdev);
1341
1342 if (dev)
1343 rc = ata_scsi_dev_config(sdev, dev);
1344
1345 return rc;
1346 }
1347
1348 /**
1349 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1350 * @sdev: SCSI device to be destroyed
1351 *
1352 * @sdev is about to be destroyed for hot/warm unplugging. If
1353 * this unplugging was initiated by libata as indicated by NULL
1354 * dev->sdev, this function doesn't have to do anything.
1355 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1356 * Clear dev->sdev, schedule the device for ATA detach and invoke
1357 * EH.
1358 *
1359 * LOCKING:
1360 * Defined by SCSI layer. We don't really care.
1361 */
1362 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1363 {
1364 struct ata_port *ap = ata_shost_to_port(sdev->host);
1365 struct request_queue *q = sdev->request_queue;
1366 unsigned long flags;
1367 struct ata_device *dev;
1368
1369 if (!ap->ops->error_handler)
1370 return;
1371
1372 spin_lock_irqsave(ap->lock, flags);
1373 dev = __ata_scsi_find_dev(ap, sdev);
1374 if (dev && dev->sdev) {
1375 /* SCSI device already in CANCEL state, no need to offline it */
1376 dev->sdev = NULL;
1377 dev->flags |= ATA_DFLAG_DETACH;
1378 ata_port_schedule_eh(ap);
1379 }
1380 spin_unlock_irqrestore(ap->lock, flags);
1381
1382 kfree(q->dma_drain_buffer);
1383 q->dma_drain_buffer = NULL;
1384 q->dma_drain_size = 0;
1385 }
1386
1387 /**
1388 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1389 * @ap: ATA port to which the device change the queue depth
1390 * @sdev: SCSI device to configure queue depth for
1391 * @queue_depth: new queue depth
1392 *
1393 * libsas and libata have different approaches for associating a sdev to
1394 * its ata_port.
1395 *
1396 */
1397 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1398 int queue_depth)
1399 {
1400 struct ata_device *dev;
1401 unsigned long flags;
1402
1403 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1404 return sdev->queue_depth;
1405
1406 dev = ata_scsi_find_dev(ap, sdev);
1407 if (!dev || !ata_dev_enabled(dev))
1408 return sdev->queue_depth;
1409
1410 /* NCQ enabled? */
1411 spin_lock_irqsave(ap->lock, flags);
1412 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1413 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1414 dev->flags |= ATA_DFLAG_NCQ_OFF;
1415 queue_depth = 1;
1416 }
1417 spin_unlock_irqrestore(ap->lock, flags);
1418
1419 /* limit and apply queue depth */
1420 queue_depth = min(queue_depth, sdev->host->can_queue);
1421 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1422 queue_depth = min(queue_depth, ATA_MAX_QUEUE);
1423
1424 if (sdev->queue_depth == queue_depth)
1425 return -EINVAL;
1426
1427 return scsi_change_queue_depth(sdev, queue_depth);
1428 }
1429
1430 /**
1431 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1432 * @sdev: SCSI device to configure queue depth for
1433 * @queue_depth: new queue depth
1434 *
1435 * This is libata standard hostt->change_queue_depth callback.
1436 * SCSI will call into this callback when user tries to set queue
1437 * depth via sysfs.
1438 *
1439 * LOCKING:
1440 * SCSI layer (we don't care)
1441 *
1442 * RETURNS:
1443 * Newly configured queue depth.
1444 */
1445 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1446 {
1447 struct ata_port *ap = ata_shost_to_port(sdev->host);
1448
1449 return __ata_change_queue_depth(ap, sdev, queue_depth);
1450 }
1451
1452 /**
1453 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1454 * @qc: Storage for translated ATA taskfile
1455 *
1456 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1457 * (to start). Perhaps these commands should be preceded by
1458 * CHECK POWER MODE to see what power mode the device is already in.
1459 * [See SAT revision 5 at www.t10.org]
1460 *
1461 * LOCKING:
1462 * spin_lock_irqsave(host lock)
1463 *
1464 * RETURNS:
1465 * Zero on success, non-zero on error.
1466 */
1467 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1468 {
1469 struct scsi_cmnd *scmd = qc->scsicmd;
1470 struct ata_taskfile *tf = &qc->tf;
1471 const u8 *cdb = scmd->cmnd;
1472 u16 fp;
1473 u8 bp = 0xff;
1474
1475 if (scmd->cmd_len < 5) {
1476 fp = 4;
1477 goto invalid_fld;
1478 }
1479
1480 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1481 tf->protocol = ATA_PROT_NODATA;
1482 if (cdb[1] & 0x1) {
1483 ; /* ignore IMMED bit, violates sat-r05 */
1484 }
1485 if (cdb[4] & 0x2) {
1486 fp = 4;
1487 bp = 1;
1488 goto invalid_fld; /* LOEJ bit set not supported */
1489 }
1490 if (((cdb[4] >> 4) & 0xf) != 0) {
1491 fp = 4;
1492 bp = 3;
1493 goto invalid_fld; /* power conditions not supported */
1494 }
1495
1496 if (cdb[4] & 0x1) {
1497 tf->nsect = 1; /* 1 sector, lba=0 */
1498
1499 if (qc->dev->flags & ATA_DFLAG_LBA) {
1500 tf->flags |= ATA_TFLAG_LBA;
1501
1502 tf->lbah = 0x0;
1503 tf->lbam = 0x0;
1504 tf->lbal = 0x0;
1505 tf->device |= ATA_LBA;
1506 } else {
1507 /* CHS */
1508 tf->lbal = 0x1; /* sect */
1509 tf->lbam = 0x0; /* cyl low */
1510 tf->lbah = 0x0; /* cyl high */
1511 }
1512
1513 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1514 } else {
1515 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1516 * or S5) causing some drives to spin up and down again.
1517 */
1518 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1519 system_state == SYSTEM_POWER_OFF)
1520 goto skip;
1521
1522 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1523 system_entering_hibernation())
1524 goto skip;
1525
1526 /* Issue ATA STANDBY IMMEDIATE command */
1527 tf->command = ATA_CMD_STANDBYNOW1;
1528 }
1529
1530 /*
1531 * Standby and Idle condition timers could be implemented but that
1532 * would require libata to implement the Power condition mode page
1533 * and allow the user to change it. Changing mode pages requires
1534 * MODE SELECT to be implemented.
1535 */
1536
1537 return 0;
1538
1539 invalid_fld:
1540 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1541 return 1;
1542 skip:
1543 scmd->result = SAM_STAT_GOOD;
1544 return 1;
1545 }
1546
1547
1548 /**
1549 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1550 * @qc: Storage for translated ATA taskfile
1551 *
1552 * Sets up an ATA taskfile to issue FLUSH CACHE or
1553 * FLUSH CACHE EXT.
1554 *
1555 * LOCKING:
1556 * spin_lock_irqsave(host lock)
1557 *
1558 * RETURNS:
1559 * Zero on success, non-zero on error.
1560 */
1561 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1562 {
1563 struct ata_taskfile *tf = &qc->tf;
1564
1565 tf->flags |= ATA_TFLAG_DEVICE;
1566 tf->protocol = ATA_PROT_NODATA;
1567
1568 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1569 tf->command = ATA_CMD_FLUSH_EXT;
1570 else
1571 tf->command = ATA_CMD_FLUSH;
1572
1573 /* flush is critical for IO integrity, consider it an IO command */
1574 qc->flags |= ATA_QCFLAG_IO;
1575
1576 return 0;
1577 }
1578
1579 /**
1580 * scsi_6_lba_len - Get LBA and transfer length
1581 * @cdb: SCSI command to translate
1582 *
1583 * Calculate LBA and transfer length for 6-byte commands.
1584 *
1585 * RETURNS:
1586 * @plba: the LBA
1587 * @plen: the transfer length
1588 */
1589 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1590 {
1591 u64 lba = 0;
1592 u32 len;
1593
1594 VPRINTK("six-byte command\n");
1595
1596 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1597 lba |= ((u64)cdb[2]) << 8;
1598 lba |= ((u64)cdb[3]);
1599
1600 len = cdb[4];
1601
1602 *plba = lba;
1603 *plen = len;
1604 }
1605
1606 /**
1607 * scsi_10_lba_len - Get LBA and transfer length
1608 * @cdb: SCSI command to translate
1609 *
1610 * Calculate LBA and transfer length for 10-byte commands.
1611 *
1612 * RETURNS:
1613 * @plba: the LBA
1614 * @plen: the transfer length
1615 */
1616 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1617 {
1618 u64 lba = 0;
1619 u32 len = 0;
1620
1621 VPRINTK("ten-byte command\n");
1622
1623 lba |= ((u64)cdb[2]) << 24;
1624 lba |= ((u64)cdb[3]) << 16;
1625 lba |= ((u64)cdb[4]) << 8;
1626 lba |= ((u64)cdb[5]);
1627
1628 len |= ((u32)cdb[7]) << 8;
1629 len |= ((u32)cdb[8]);
1630
1631 *plba = lba;
1632 *plen = len;
1633 }
1634
1635 /**
1636 * scsi_16_lba_len - Get LBA and transfer length
1637 * @cdb: SCSI command to translate
1638 *
1639 * Calculate LBA and transfer length for 16-byte commands.
1640 *
1641 * RETURNS:
1642 * @plba: the LBA
1643 * @plen: the transfer length
1644 */
1645 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1646 {
1647 u64 lba = 0;
1648 u32 len = 0;
1649
1650 VPRINTK("sixteen-byte command\n");
1651
1652 lba |= ((u64)cdb[2]) << 56;
1653 lba |= ((u64)cdb[3]) << 48;
1654 lba |= ((u64)cdb[4]) << 40;
1655 lba |= ((u64)cdb[5]) << 32;
1656 lba |= ((u64)cdb[6]) << 24;
1657 lba |= ((u64)cdb[7]) << 16;
1658 lba |= ((u64)cdb[8]) << 8;
1659 lba |= ((u64)cdb[9]);
1660
1661 len |= ((u32)cdb[10]) << 24;
1662 len |= ((u32)cdb[11]) << 16;
1663 len |= ((u32)cdb[12]) << 8;
1664 len |= ((u32)cdb[13]);
1665
1666 *plba = lba;
1667 *plen = len;
1668 }
1669
1670 /**
1671 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1672 * @qc: Storage for translated ATA taskfile
1673 *
1674 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1675 *
1676 * LOCKING:
1677 * spin_lock_irqsave(host lock)
1678 *
1679 * RETURNS:
1680 * Zero on success, non-zero on error.
1681 */
1682 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1683 {
1684 struct scsi_cmnd *scmd = qc->scsicmd;
1685 struct ata_taskfile *tf = &qc->tf;
1686 struct ata_device *dev = qc->dev;
1687 u64 dev_sectors = qc->dev->n_sectors;
1688 const u8 *cdb = scmd->cmnd;
1689 u64 block;
1690 u32 n_block;
1691 u16 fp;
1692
1693 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1694 tf->protocol = ATA_PROT_NODATA;
1695
1696 if (cdb[0] == VERIFY) {
1697 if (scmd->cmd_len < 10) {
1698 fp = 9;
1699 goto invalid_fld;
1700 }
1701 scsi_10_lba_len(cdb, &block, &n_block);
1702 } else if (cdb[0] == VERIFY_16) {
1703 if (scmd->cmd_len < 16) {
1704 fp = 15;
1705 goto invalid_fld;
1706 }
1707 scsi_16_lba_len(cdb, &block, &n_block);
1708 } else {
1709 fp = 0;
1710 goto invalid_fld;
1711 }
1712
1713 if (!n_block)
1714 goto nothing_to_do;
1715 if (block >= dev_sectors)
1716 goto out_of_range;
1717 if ((block + n_block) > dev_sectors)
1718 goto out_of_range;
1719
1720 if (dev->flags & ATA_DFLAG_LBA) {
1721 tf->flags |= ATA_TFLAG_LBA;
1722
1723 if (lba_28_ok(block, n_block)) {
1724 /* use LBA28 */
1725 tf->command = ATA_CMD_VERIFY;
1726 tf->device |= (block >> 24) & 0xf;
1727 } else if (lba_48_ok(block, n_block)) {
1728 if (!(dev->flags & ATA_DFLAG_LBA48))
1729 goto out_of_range;
1730
1731 /* use LBA48 */
1732 tf->flags |= ATA_TFLAG_LBA48;
1733 tf->command = ATA_CMD_VERIFY_EXT;
1734
1735 tf->hob_nsect = (n_block >> 8) & 0xff;
1736
1737 tf->hob_lbah = (block >> 40) & 0xff;
1738 tf->hob_lbam = (block >> 32) & 0xff;
1739 tf->hob_lbal = (block >> 24) & 0xff;
1740 } else
1741 /* request too large even for LBA48 */
1742 goto out_of_range;
1743
1744 tf->nsect = n_block & 0xff;
1745
1746 tf->lbah = (block >> 16) & 0xff;
1747 tf->lbam = (block >> 8) & 0xff;
1748 tf->lbal = block & 0xff;
1749
1750 tf->device |= ATA_LBA;
1751 } else {
1752 /* CHS */
1753 u32 sect, head, cyl, track;
1754
1755 if (!lba_28_ok(block, n_block))
1756 goto out_of_range;
1757
1758 /* Convert LBA to CHS */
1759 track = (u32)block / dev->sectors;
1760 cyl = track / dev->heads;
1761 head = track % dev->heads;
1762 sect = (u32)block % dev->sectors + 1;
1763
1764 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1765 (u32)block, track, cyl, head, sect);
1766
1767 /* Check whether the converted CHS can fit.
1768 Cylinder: 0-65535
1769 Head: 0-15
1770 Sector: 1-255*/
1771 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1772 goto out_of_range;
1773
1774 tf->command = ATA_CMD_VERIFY;
1775 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1776 tf->lbal = sect;
1777 tf->lbam = cyl;
1778 tf->lbah = cyl >> 8;
1779 tf->device |= head;
1780 }
1781
1782 return 0;
1783
1784 invalid_fld:
1785 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1786 return 1;
1787
1788 out_of_range:
1789 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1790 /* "Logical Block Address out of range" */
1791 return 1;
1792
1793 nothing_to_do:
1794 scmd->result = SAM_STAT_GOOD;
1795 return 1;
1796 }
1797
1798 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1799 {
1800 struct request *rq = scmd->request;
1801 u32 req_blocks;
1802
1803 if (!blk_rq_is_passthrough(rq))
1804 return true;
1805
1806 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1807 if (n_blocks > req_blocks)
1808 return false;
1809
1810 return true;
1811 }
1812
1813 /**
1814 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1815 * @qc: Storage for translated ATA taskfile
1816 *
1817 * Converts any of six SCSI read/write commands into the
1818 * ATA counterpart, including starting sector (LBA),
1819 * sector count, and taking into account the device's LBA48
1820 * support.
1821 *
1822 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1823 * %WRITE_16 are currently supported.
1824 *
1825 * LOCKING:
1826 * spin_lock_irqsave(host lock)
1827 *
1828 * RETURNS:
1829 * Zero on success, non-zero on error.
1830 */
1831 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1832 {
1833 struct scsi_cmnd *scmd = qc->scsicmd;
1834 const u8 *cdb = scmd->cmnd;
1835 struct request *rq = scmd->request;
1836 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1837 unsigned int tf_flags = 0;
1838 u64 block;
1839 u32 n_block;
1840 int rc;
1841 u16 fp = 0;
1842
1843 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1844 tf_flags |= ATA_TFLAG_WRITE;
1845
1846 /* Calculate the SCSI LBA, transfer length and FUA. */
1847 switch (cdb[0]) {
1848 case READ_10:
1849 case WRITE_10:
1850 if (unlikely(scmd->cmd_len < 10)) {
1851 fp = 9;
1852 goto invalid_fld;
1853 }
1854 scsi_10_lba_len(cdb, &block, &n_block);
1855 if (cdb[1] & (1 << 3))
1856 tf_flags |= ATA_TFLAG_FUA;
1857 if (!ata_check_nblocks(scmd, n_block))
1858 goto invalid_fld;
1859 break;
1860 case READ_6:
1861 case WRITE_6:
1862 if (unlikely(scmd->cmd_len < 6)) {
1863 fp = 5;
1864 goto invalid_fld;
1865 }
1866 scsi_6_lba_len(cdb, &block, &n_block);
1867
1868 /* for 6-byte r/w commands, transfer length 0
1869 * means 256 blocks of data, not 0 block.
1870 */
1871 if (!n_block)
1872 n_block = 256;
1873 if (!ata_check_nblocks(scmd, n_block))
1874 goto invalid_fld;
1875 break;
1876 case READ_16:
1877 case WRITE_16:
1878 if (unlikely(scmd->cmd_len < 16)) {
1879 fp = 15;
1880 goto invalid_fld;
1881 }
1882 scsi_16_lba_len(cdb, &block, &n_block);
1883 if (cdb[1] & (1 << 3))
1884 tf_flags |= ATA_TFLAG_FUA;
1885 if (!ata_check_nblocks(scmd, n_block))
1886 goto invalid_fld;
1887 break;
1888 default:
1889 DPRINTK("no-byte command\n");
1890 fp = 0;
1891 goto invalid_fld;
1892 }
1893
1894 /* Check and compose ATA command */
1895 if (!n_block)
1896 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1897 * length 0 means transfer 0 block of data.
1898 * However, for ATA R/W commands, sector count 0 means
1899 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1900 *
1901 * WARNING: one or two older ATA drives treat 0 as 0...
1902 */
1903 goto nothing_to_do;
1904
1905 qc->flags |= ATA_QCFLAG_IO;
1906 qc->nbytes = n_block * scmd->device->sector_size;
1907
1908 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1909 qc->hw_tag, class);
1910
1911 if (likely(rc == 0))
1912 return 0;
1913
1914 if (rc == -ERANGE)
1915 goto out_of_range;
1916 /* treat all other errors as -EINVAL, fall through */
1917 invalid_fld:
1918 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1919 return 1;
1920
1921 out_of_range:
1922 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1923 /* "Logical Block Address out of range" */
1924 return 1;
1925
1926 nothing_to_do:
1927 scmd->result = SAM_STAT_GOOD;
1928 return 1;
1929 }
1930
1931 static void ata_qc_done(struct ata_queued_cmd *qc)
1932 {
1933 struct scsi_cmnd *cmd = qc->scsicmd;
1934 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1935
1936 ata_qc_free(qc);
1937 done(cmd);
1938 }
1939
1940 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1941 {
1942 struct ata_port *ap = qc->ap;
1943 struct scsi_cmnd *cmd = qc->scsicmd;
1944 u8 *cdb = cmd->cmnd;
1945 int need_sense = (qc->err_mask != 0);
1946
1947 /* For ATA pass thru (SAT) commands, generate a sense block if
1948 * user mandated it or if there's an error. Note that if we
1949 * generate because the user forced us to [CK_COND =1], a check
1950 * condition is generated and the ATA register values are returned
1951 * whether the command completed successfully or not. If there
1952 * was no error, we use the following sense data:
1953 * sk = RECOVERED ERROR
1954 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1955 */
1956 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1957 ((cdb[2] & 0x20) || need_sense))
1958 ata_gen_passthru_sense(qc);
1959 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1960 cmd->result = SAM_STAT_CHECK_CONDITION;
1961 else if (need_sense)
1962 ata_gen_ata_sense(qc);
1963 else
1964 cmd->result = SAM_STAT_GOOD;
1965
1966 if (need_sense && !ap->ops->error_handler)
1967 ata_dump_status(ap->print_id, &qc->result_tf);
1968
1969 ata_qc_done(qc);
1970 }
1971
1972 /**
1973 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1974 * @dev: ATA device to which the command is addressed
1975 * @cmd: SCSI command to execute
1976 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1977 *
1978 * Our ->queuecommand() function has decided that the SCSI
1979 * command issued can be directly translated into an ATA
1980 * command, rather than handled internally.
1981 *
1982 * This function sets up an ata_queued_cmd structure for the
1983 * SCSI command, and sends that ata_queued_cmd to the hardware.
1984 *
1985 * The xlat_func argument (actor) returns 0 if ready to execute
1986 * ATA command, else 1 to finish translation. If 1 is returned
1987 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1988 * to be set reflecting an error condition or clean (early)
1989 * termination.
1990 *
1991 * LOCKING:
1992 * spin_lock_irqsave(host lock)
1993 *
1994 * RETURNS:
1995 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1996 * needs to be deferred.
1997 */
1998 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1999 ata_xlat_func_t xlat_func)
2000 {
2001 struct ata_port *ap = dev->link->ap;
2002 struct ata_queued_cmd *qc;
2003 int rc;
2004
2005 VPRINTK("ENTER\n");
2006
2007 qc = ata_scsi_qc_new(dev, cmd);
2008 if (!qc)
2009 goto err_mem;
2010
2011 /* data is present; dma-map it */
2012 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2013 cmd->sc_data_direction == DMA_TO_DEVICE) {
2014 if (unlikely(scsi_bufflen(cmd) < 1)) {
2015 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2016 goto err_did;
2017 }
2018
2019 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2020
2021 qc->dma_dir = cmd->sc_data_direction;
2022 }
2023
2024 qc->complete_fn = ata_scsi_qc_complete;
2025
2026 if (xlat_func(qc))
2027 goto early_finish;
2028
2029 if (ap->ops->qc_defer) {
2030 if ((rc = ap->ops->qc_defer(qc)))
2031 goto defer;
2032 }
2033
2034 /* select device, send command to hardware */
2035 ata_qc_issue(qc);
2036
2037 VPRINTK("EXIT\n");
2038 return 0;
2039
2040 early_finish:
2041 ata_qc_free(qc);
2042 cmd->scsi_done(cmd);
2043 DPRINTK("EXIT - early finish (good or error)\n");
2044 return 0;
2045
2046 err_did:
2047 ata_qc_free(qc);
2048 cmd->result = (DID_ERROR << 16);
2049 cmd->scsi_done(cmd);
2050 err_mem:
2051 DPRINTK("EXIT - internal\n");
2052 return 0;
2053
2054 defer:
2055 ata_qc_free(qc);
2056 DPRINTK("EXIT - defer\n");
2057 if (rc == ATA_DEFER_LINK)
2058 return SCSI_MLQUEUE_DEVICE_BUSY;
2059 else
2060 return SCSI_MLQUEUE_HOST_BUSY;
2061 }
2062
2063 struct ata_scsi_args {
2064 struct ata_device *dev;
2065 u16 *id;
2066 struct scsi_cmnd *cmd;
2067 };
2068
2069 /**
2070 * ata_scsi_rbuf_get - Map response buffer.
2071 * @cmd: SCSI command containing buffer to be mapped.
2072 * @flags: unsigned long variable to store irq enable status
2073 * @copy_in: copy in from user buffer
2074 *
2075 * Prepare buffer for simulated SCSI commands.
2076 *
2077 * LOCKING:
2078 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2079 *
2080 * RETURNS:
2081 * Pointer to response buffer.
2082 */
2083 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2084 unsigned long *flags)
2085 {
2086 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2087
2088 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2089 if (copy_in)
2090 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2091 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2092 return ata_scsi_rbuf;
2093 }
2094
2095 /**
2096 * ata_scsi_rbuf_put - Unmap response buffer.
2097 * @cmd: SCSI command containing buffer to be unmapped.
2098 * @copy_out: copy out result
2099 * @flags: @flags passed to ata_scsi_rbuf_get()
2100 *
2101 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2102 * @copy_back is true.
2103 *
2104 * LOCKING:
2105 * Unlocks ata_scsi_rbuf_lock.
2106 */
2107 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2108 unsigned long *flags)
2109 {
2110 if (copy_out)
2111 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2112 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2113 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2114 }
2115
2116 /**
2117 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2118 * @args: device IDENTIFY data / SCSI command of interest.
2119 * @actor: Callback hook for desired SCSI command simulator
2120 *
2121 * Takes care of the hard work of simulating a SCSI command...
2122 * Mapping the response buffer, calling the command's handler,
2123 * and handling the handler's return value. This return value
2124 * indicates whether the handler wishes the SCSI command to be
2125 * completed successfully (0), or not (in which case cmd->result
2126 * and sense buffer are assumed to be set).
2127 *
2128 * LOCKING:
2129 * spin_lock_irqsave(host lock)
2130 */
2131 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2132 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2133 {
2134 u8 *rbuf;
2135 unsigned int rc;
2136 struct scsi_cmnd *cmd = args->cmd;
2137 unsigned long flags;
2138
2139 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2140 rc = actor(args, rbuf);
2141 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2142
2143 if (rc == 0)
2144 cmd->result = SAM_STAT_GOOD;
2145 }
2146
2147 /**
2148 * ata_scsiop_inq_std - Simulate INQUIRY command
2149 * @args: device IDENTIFY data / SCSI command of interest.
2150 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2151 *
2152 * Returns standard device identification data associated
2153 * with non-VPD INQUIRY command output.
2154 *
2155 * LOCKING:
2156 * spin_lock_irqsave(host lock)
2157 */
2158 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2159 {
2160 static const u8 versions[] = {
2161 0x00,
2162 0x60, /* SAM-3 (no version claimed) */
2163
2164 0x03,
2165 0x20, /* SBC-2 (no version claimed) */
2166
2167 0x03,
2168 0x00 /* SPC-3 (no version claimed) */
2169 };
2170 static const u8 versions_zbc[] = {
2171 0x00,
2172 0xA0, /* SAM-5 (no version claimed) */
2173
2174 0x06,
2175 0x00, /* SBC-4 (no version claimed) */
2176
2177 0x05,
2178 0xC0, /* SPC-5 (no version claimed) */
2179
2180 0x60,
2181 0x24, /* ZBC r05 */
2182 };
2183
2184 u8 hdr[] = {
2185 TYPE_DISK,
2186 0,
2187 0x5, /* claim SPC-3 version compatibility */
2188 2,
2189 95 - 4,
2190 0,
2191 0,
2192 2
2193 };
2194
2195 VPRINTK("ENTER\n");
2196
2197 /* set scsi removable (RMB) bit per ata bit, or if the
2198 * AHCI port says it's external (Hotplug-capable, eSATA).
2199 */
2200 if (ata_id_removable(args->id) ||
2201 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2202 hdr[1] |= (1 << 7);
2203
2204 if (args->dev->class == ATA_DEV_ZAC) {
2205 hdr[0] = TYPE_ZBC;
2206 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2207 }
2208
2209 memcpy(rbuf, hdr, sizeof(hdr));
2210 memcpy(&rbuf[8], "ATA ", 8);
2211 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2212
2213 /* From SAT, use last 2 words from fw rev unless they are spaces */
2214 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2215 if (strncmp(&rbuf[32], " ", 4) == 0)
2216 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2217
2218 if (rbuf[32] == 0 || rbuf[32] == ' ')
2219 memcpy(&rbuf[32], "n/a ", 4);
2220
2221 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2222 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2223 else
2224 memcpy(rbuf + 58, versions, sizeof(versions));
2225
2226 return 0;
2227 }
2228
2229 /**
2230 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2231 * @args: device IDENTIFY data / SCSI command of interest.
2232 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2233 *
2234 * Returns list of inquiry VPD pages available.
2235 *
2236 * LOCKING:
2237 * spin_lock_irqsave(host lock)
2238 */
2239 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2240 {
2241 int num_pages;
2242 static const u8 pages[] = {
2243 0x00, /* page 0x00, this page */
2244 0x80, /* page 0x80, unit serial no page */
2245 0x83, /* page 0x83, device ident page */
2246 0x89, /* page 0x89, ata info page */
2247 0xb0, /* page 0xb0, block limits page */
2248 0xb1, /* page 0xb1, block device characteristics page */
2249 0xb2, /* page 0xb2, thin provisioning page */
2250 0xb6, /* page 0xb6, zoned block device characteristics */
2251 };
2252
2253 num_pages = sizeof(pages);
2254 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2255 num_pages--;
2256 rbuf[3] = num_pages; /* number of supported VPD pages */
2257 memcpy(rbuf + 4, pages, num_pages);
2258 return 0;
2259 }
2260
2261 /**
2262 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2263 * @args: device IDENTIFY data / SCSI command of interest.
2264 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2265 *
2266 * Returns ATA device serial number.
2267 *
2268 * LOCKING:
2269 * spin_lock_irqsave(host lock)
2270 */
2271 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2272 {
2273 static const u8 hdr[] = {
2274 0,
2275 0x80, /* this page code */
2276 0,
2277 ATA_ID_SERNO_LEN, /* page len */
2278 };
2279
2280 memcpy(rbuf, hdr, sizeof(hdr));
2281 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2282 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2283 return 0;
2284 }
2285
2286 /**
2287 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2288 * @args: device IDENTIFY data / SCSI command of interest.
2289 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2290 *
2291 * Yields two logical unit device identification designators:
2292 * - vendor specific ASCII containing the ATA serial number
2293 * - SAT defined "t10 vendor id based" containing ASCII vendor
2294 * name ("ATA "), model and serial numbers.
2295 *
2296 * LOCKING:
2297 * spin_lock_irqsave(host lock)
2298 */
2299 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2300 {
2301 const int sat_model_serial_desc_len = 68;
2302 int num;
2303
2304 rbuf[1] = 0x83; /* this page code */
2305 num = 4;
2306
2307 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2308 rbuf[num + 0] = 2;
2309 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2310 num += 4;
2311 ata_id_string(args->id, (unsigned char *) rbuf + num,
2312 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2313 num += ATA_ID_SERNO_LEN;
2314
2315 /* SAT defined lu model and serial numbers descriptor */
2316 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2317 rbuf[num + 0] = 2;
2318 rbuf[num + 1] = 1;
2319 rbuf[num + 3] = sat_model_serial_desc_len;
2320 num += 4;
2321 memcpy(rbuf + num, "ATA ", 8);
2322 num += 8;
2323 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2324 ATA_ID_PROD_LEN);
2325 num += ATA_ID_PROD_LEN;
2326 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2327 ATA_ID_SERNO_LEN);
2328 num += ATA_ID_SERNO_LEN;
2329
2330 if (ata_id_has_wwn(args->id)) {
2331 /* SAT defined lu world wide name */
2332 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2333 rbuf[num + 0] = 1;
2334 rbuf[num + 1] = 3;
2335 rbuf[num + 3] = ATA_ID_WWN_LEN;
2336 num += 4;
2337 ata_id_string(args->id, (unsigned char *) rbuf + num,
2338 ATA_ID_WWN, ATA_ID_WWN_LEN);
2339 num += ATA_ID_WWN_LEN;
2340 }
2341 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2342 return 0;
2343 }
2344
2345 /**
2346 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2347 * @args: device IDENTIFY data / SCSI command of interest.
2348 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2349 *
2350 * Yields SAT-specified ATA VPD page.
2351 *
2352 * LOCKING:
2353 * spin_lock_irqsave(host lock)
2354 */
2355 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2356 {
2357 struct ata_taskfile tf;
2358
2359 memset(&tf, 0, sizeof(tf));
2360
2361 rbuf[1] = 0x89; /* our page code */
2362 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2363 rbuf[3] = (0x238 & 0xff);
2364
2365 memcpy(&rbuf[8], "linux ", 8);
2366 memcpy(&rbuf[16], "libata ", 16);
2367 memcpy(&rbuf[32], DRV_VERSION, 4);
2368
2369 /* we don't store the ATA device signature, so we fake it */
2370
2371 tf.command = ATA_DRDY; /* really, this is Status reg */
2372 tf.lbal = 0x1;
2373 tf.nsect = 0x1;
2374
2375 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2376 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2377
2378 rbuf[56] = ATA_CMD_ID_ATA;
2379
2380 memcpy(&rbuf[60], &args->id[0], 512);
2381 return 0;
2382 }
2383
2384 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2385 {
2386 u16 min_io_sectors;
2387
2388 rbuf[1] = 0xb0;
2389 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2390
2391 /*
2392 * Optimal transfer length granularity.
2393 *
2394 * This is always one physical block, but for disks with a smaller
2395 * logical than physical sector size we need to figure out what the
2396 * latter is.
2397 */
2398 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2399 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2400
2401 /*
2402 * Optimal unmap granularity.
2403 *
2404 * The ATA spec doesn't even know about a granularity or alignment
2405 * for the TRIM command. We can leave away most of the unmap related
2406 * VPD page entries, but we have specifify a granularity to signal
2407 * that we support some form of unmap - in thise case via WRITE SAME
2408 * with the unmap bit set.
2409 */
2410 if (ata_id_has_trim(args->id)) {
2411 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2412 put_unaligned_be32(1, &rbuf[28]);
2413 }
2414
2415 return 0;
2416 }
2417
2418 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2419 {
2420 int form_factor = ata_id_form_factor(args->id);
2421 int media_rotation_rate = ata_id_rotation_rate(args->id);
2422 u8 zoned = ata_id_zoned_cap(args->id);
2423
2424 rbuf[1] = 0xb1;
2425 rbuf[3] = 0x3c;
2426 rbuf[4] = media_rotation_rate >> 8;
2427 rbuf[5] = media_rotation_rate;
2428 rbuf[7] = form_factor;
2429 if (zoned)
2430 rbuf[8] = (zoned << 4);
2431
2432 return 0;
2433 }
2434
2435 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2436 {
2437 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2438 rbuf[1] = 0xb2;
2439 rbuf[3] = 0x4;
2440 rbuf[5] = 1 << 6; /* TPWS */
2441
2442 return 0;
2443 }
2444
2445 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2446 {
2447 /*
2448 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2449 */
2450 rbuf[1] = 0xb6;
2451 rbuf[3] = 0x3C;
2452
2453 /*
2454 * URSWRZ bit is only meaningful for host-managed ZAC drives
2455 */
2456 if (args->dev->zac_zoned_cap & 1)
2457 rbuf[4] |= 1;
2458 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2459 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2460 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2461
2462 return 0;
2463 }
2464
2465 /**
2466 * modecpy - Prepare response for MODE SENSE
2467 * @dest: output buffer
2468 * @src: data being copied
2469 * @n: length of mode page
2470 * @changeable: whether changeable parameters are requested
2471 *
2472 * Generate a generic MODE SENSE page for either current or changeable
2473 * parameters.
2474 *
2475 * LOCKING:
2476 * None.
2477 */
2478 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2479 {
2480 if (changeable) {
2481 memcpy(dest, src, 2);
2482 memset(dest + 2, 0, n - 2);
2483 } else {
2484 memcpy(dest, src, n);
2485 }
2486 }
2487
2488 /**
2489 * ata_msense_caching - Simulate MODE SENSE caching info page
2490 * @id: device IDENTIFY data
2491 * @buf: output buffer
2492 * @changeable: whether changeable parameters are requested
2493 *
2494 * Generate a caching info page, which conditionally indicates
2495 * write caching to the SCSI layer, depending on device
2496 * capabilities.
2497 *
2498 * LOCKING:
2499 * None.
2500 */
2501 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2502 {
2503 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2504 if (changeable) {
2505 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2506 } else {
2507 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2508 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2509 }
2510 return sizeof(def_cache_mpage);
2511 }
2512
2513 /**
2514 * ata_msense_control - Simulate MODE SENSE control mode page
2515 * @dev: ATA device of interest
2516 * @buf: output buffer
2517 * @changeable: whether changeable parameters are requested
2518 *
2519 * Generate a generic MODE SENSE control mode page.
2520 *
2521 * LOCKING:
2522 * None.
2523 */
2524 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2525 bool changeable)
2526 {
2527 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2528 if (changeable) {
2529 buf[2] |= (1 << 2); /* ata_mselect_control() */
2530 } else {
2531 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2532
2533 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2534 }
2535 return sizeof(def_control_mpage);
2536 }
2537
2538 /**
2539 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2540 * @buf: output buffer
2541 * @changeable: whether changeable parameters are requested
2542 *
2543 * Generate a generic MODE SENSE r/w error recovery page.
2544 *
2545 * LOCKING:
2546 * None.
2547 */
2548 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2549 {
2550 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2551 changeable);
2552 return sizeof(def_rw_recovery_mpage);
2553 }
2554
2555 /*
2556 * We can turn this into a real blacklist if it's needed, for now just
2557 * blacklist any Maxtor BANC1G10 revision firmware
2558 */
2559 static int ata_dev_supports_fua(u16 *id)
2560 {
2561 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2562
2563 if (!libata_fua)
2564 return 0;
2565 if (!ata_id_has_fua(id))
2566 return 0;
2567
2568 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2569 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2570
2571 if (strcmp(model, "Maxtor"))
2572 return 1;
2573 if (strcmp(fw, "BANC1G10"))
2574 return 1;
2575
2576 return 0; /* blacklisted */
2577 }
2578
2579 /**
2580 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2581 * @args: device IDENTIFY data / SCSI command of interest.
2582 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2583 *
2584 * Simulate MODE SENSE commands. Assume this is invoked for direct
2585 * access devices (e.g. disks) only. There should be no block
2586 * descriptor for other device types.
2587 *
2588 * LOCKING:
2589 * spin_lock_irqsave(host lock)
2590 */
2591 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2592 {
2593 struct ata_device *dev = args->dev;
2594 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2595 static const u8 sat_blk_desc[] = {
2596 0, 0, 0, 0, /* number of blocks: sat unspecified */
2597 0,
2598 0, 0x2, 0x0 /* block length: 512 bytes */
2599 };
2600 u8 pg, spg;
2601 unsigned int ebd, page_control, six_byte;
2602 u8 dpofua, bp = 0xff;
2603 u16 fp;
2604
2605 VPRINTK("ENTER\n");
2606
2607 six_byte = (scsicmd[0] == MODE_SENSE);
2608 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2609 /*
2610 * LLBA bit in msense(10) ignored (compliant)
2611 */
2612
2613 page_control = scsicmd[2] >> 6;
2614 switch (page_control) {
2615 case 0: /* current */
2616 case 1: /* changeable */
2617 case 2: /* defaults */
2618 break; /* supported */
2619 case 3: /* saved */
2620 goto saving_not_supp;
2621 default:
2622 fp = 2;
2623 bp = 6;
2624 goto invalid_fld;
2625 }
2626
2627 if (six_byte)
2628 p += 4 + (ebd ? 8 : 0);
2629 else
2630 p += 8 + (ebd ? 8 : 0);
2631
2632 pg = scsicmd[2] & 0x3f;
2633 spg = scsicmd[3];
2634 /*
2635 * No mode subpages supported (yet) but asking for _all_
2636 * subpages may be valid
2637 */
2638 if (spg && (spg != ALL_SUB_MPAGES)) {
2639 fp = 3;
2640 goto invalid_fld;
2641 }
2642
2643 switch(pg) {
2644 case RW_RECOVERY_MPAGE:
2645 p += ata_msense_rw_recovery(p, page_control == 1);
2646 break;
2647
2648 case CACHE_MPAGE:
2649 p += ata_msense_caching(args->id, p, page_control == 1);
2650 break;
2651
2652 case CONTROL_MPAGE:
2653 p += ata_msense_control(args->dev, p, page_control == 1);
2654 break;
2655
2656 case ALL_MPAGES:
2657 p += ata_msense_rw_recovery(p, page_control == 1);
2658 p += ata_msense_caching(args->id, p, page_control == 1);
2659 p += ata_msense_control(args->dev, p, page_control == 1);
2660 break;
2661
2662 default: /* invalid page code */
2663 fp = 2;
2664 goto invalid_fld;
2665 }
2666
2667 dpofua = 0;
2668 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2669 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2670 dpofua = 1 << 4;
2671
2672 if (six_byte) {
2673 rbuf[0] = p - rbuf - 1;
2674 rbuf[2] |= dpofua;
2675 if (ebd) {
2676 rbuf[3] = sizeof(sat_blk_desc);
2677 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2678 }
2679 } else {
2680 unsigned int output_len = p - rbuf - 2;
2681
2682 rbuf[0] = output_len >> 8;
2683 rbuf[1] = output_len;
2684 rbuf[3] |= dpofua;
2685 if (ebd) {
2686 rbuf[7] = sizeof(sat_blk_desc);
2687 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2688 }
2689 }
2690 return 0;
2691
2692 invalid_fld:
2693 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2694 return 1;
2695
2696 saving_not_supp:
2697 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2698 /* "Saving parameters not supported" */
2699 return 1;
2700 }
2701
2702 /**
2703 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2704 * @args: device IDENTIFY data / SCSI command of interest.
2705 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2706 *
2707 * Simulate READ CAPACITY commands.
2708 *
2709 * LOCKING:
2710 * None.
2711 */
2712 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2713 {
2714 struct ata_device *dev = args->dev;
2715 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2716 u32 sector_size; /* physical sector size in bytes */
2717 u8 log2_per_phys;
2718 u16 lowest_aligned;
2719
2720 sector_size = ata_id_logical_sector_size(dev->id);
2721 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2722 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2723
2724 VPRINTK("ENTER\n");
2725
2726 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2727 if (last_lba >= 0xffffffffULL)
2728 last_lba = 0xffffffff;
2729
2730 /* sector count, 32-bit */
2731 rbuf[0] = last_lba >> (8 * 3);
2732 rbuf[1] = last_lba >> (8 * 2);
2733 rbuf[2] = last_lba >> (8 * 1);
2734 rbuf[3] = last_lba;
2735
2736 /* sector size */
2737 rbuf[4] = sector_size >> (8 * 3);
2738 rbuf[5] = sector_size >> (8 * 2);
2739 rbuf[6] = sector_size >> (8 * 1);
2740 rbuf[7] = sector_size;
2741 } else {
2742 /* sector count, 64-bit */
2743 rbuf[0] = last_lba >> (8 * 7);
2744 rbuf[1] = last_lba >> (8 * 6);
2745 rbuf[2] = last_lba >> (8 * 5);
2746 rbuf[3] = last_lba >> (8 * 4);
2747 rbuf[4] = last_lba >> (8 * 3);
2748 rbuf[5] = last_lba >> (8 * 2);
2749 rbuf[6] = last_lba >> (8 * 1);
2750 rbuf[7] = last_lba;
2751
2752 /* sector size */
2753 rbuf[ 8] = sector_size >> (8 * 3);
2754 rbuf[ 9] = sector_size >> (8 * 2);
2755 rbuf[10] = sector_size >> (8 * 1);
2756 rbuf[11] = sector_size;
2757
2758 rbuf[12] = 0;
2759 rbuf[13] = log2_per_phys;
2760 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2761 rbuf[15] = lowest_aligned;
2762
2763 if (ata_id_has_trim(args->id) &&
2764 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2765 rbuf[14] |= 0x80; /* LBPME */
2766
2767 if (ata_id_has_zero_after_trim(args->id) &&
2768 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2769 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2770 rbuf[14] |= 0x40; /* LBPRZ */
2771 }
2772 }
2773 if (ata_id_zoned_cap(args->id) ||
2774 args->dev->class == ATA_DEV_ZAC)
2775 rbuf[12] = (1 << 4); /* RC_BASIS */
2776 }
2777 return 0;
2778 }
2779
2780 /**
2781 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2782 * @args: device IDENTIFY data / SCSI command of interest.
2783 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2784 *
2785 * Simulate REPORT LUNS command.
2786 *
2787 * LOCKING:
2788 * spin_lock_irqsave(host lock)
2789 */
2790 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2791 {
2792 VPRINTK("ENTER\n");
2793 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2794
2795 return 0;
2796 }
2797
2798 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2799 {
2800 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2801 /* FIXME: not quite right; we don't want the
2802 * translation of taskfile registers into
2803 * a sense descriptors, since that's only
2804 * correct for ATA, not ATAPI
2805 */
2806 ata_gen_passthru_sense(qc);
2807 }
2808
2809 ata_qc_done(qc);
2810 }
2811
2812 /* is it pointless to prefer PIO for "safety reasons"? */
2813 static inline int ata_pio_use_silly(struct ata_port *ap)
2814 {
2815 return (ap->flags & ATA_FLAG_PIO_DMA);
2816 }
2817
2818 static void atapi_request_sense(struct ata_queued_cmd *qc)
2819 {
2820 struct ata_port *ap = qc->ap;
2821 struct scsi_cmnd *cmd = qc->scsicmd;
2822
2823 DPRINTK("ATAPI request sense\n");
2824
2825 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2826
2827 #ifdef CONFIG_ATA_SFF
2828 if (ap->ops->sff_tf_read)
2829 ap->ops->sff_tf_read(ap, &qc->tf);
2830 #endif
2831
2832 /* fill these in, for the case where they are -not- overwritten */
2833 cmd->sense_buffer[0] = 0x70;
2834 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2835
2836 ata_qc_reinit(qc);
2837
2838 /* setup sg table and init transfer direction */
2839 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2840 ata_sg_init(qc, &qc->sgent, 1);
2841 qc->dma_dir = DMA_FROM_DEVICE;
2842
2843 memset(&qc->cdb, 0, qc->dev->cdb_len);
2844 qc->cdb[0] = REQUEST_SENSE;
2845 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2846
2847 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2848 qc->tf.command = ATA_CMD_PACKET;
2849
2850 if (ata_pio_use_silly(ap)) {
2851 qc->tf.protocol = ATAPI_PROT_DMA;
2852 qc->tf.feature |= ATAPI_PKT_DMA;
2853 } else {
2854 qc->tf.protocol = ATAPI_PROT_PIO;
2855 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2856 qc->tf.lbah = 0;
2857 }
2858 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2859
2860 qc->complete_fn = atapi_sense_complete;
2861
2862 ata_qc_issue(qc);
2863
2864 DPRINTK("EXIT\n");
2865 }
2866
2867 /*
2868 * ATAPI devices typically report zero for their SCSI version, and sometimes
2869 * deviate from the spec WRT response data format. If SCSI version is
2870 * reported as zero like normal, then we make the following fixups:
2871 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2872 * modern device.
2873 * 2) Ensure response data format / ATAPI information are always correct.
2874 */
2875 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2876 {
2877 u8 buf[4];
2878
2879 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2880 if (buf[2] == 0) {
2881 buf[2] = 0x5;
2882 buf[3] = 0x32;
2883 }
2884 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2885 }
2886
2887 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2888 {
2889 struct scsi_cmnd *cmd = qc->scsicmd;
2890 unsigned int err_mask = qc->err_mask;
2891
2892 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2893
2894 /* handle completion from new EH */
2895 if (unlikely(qc->ap->ops->error_handler &&
2896 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2897
2898 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2899 /* FIXME: not quite right; we don't want the
2900 * translation of taskfile registers into a
2901 * sense descriptors, since that's only
2902 * correct for ATA, not ATAPI
2903 */
2904 ata_gen_passthru_sense(qc);
2905 }
2906
2907 /* SCSI EH automatically locks door if sdev->locked is
2908 * set. Sometimes door lock request continues to
2909 * fail, for example, when no media is present. This
2910 * creates a loop - SCSI EH issues door lock which
2911 * fails and gets invoked again to acquire sense data
2912 * for the failed command.
2913 *
2914 * If door lock fails, always clear sdev->locked to
2915 * avoid this infinite loop.
2916 *
2917 * This may happen before SCSI scan is complete. Make
2918 * sure qc->dev->sdev isn't NULL before dereferencing.
2919 */
2920 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2921 qc->dev->sdev->locked = 0;
2922
2923 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2924 ata_qc_done(qc);
2925 return;
2926 }
2927
2928 /* successful completion or old EH failure path */
2929 if (unlikely(err_mask & AC_ERR_DEV)) {
2930 cmd->result = SAM_STAT_CHECK_CONDITION;
2931 atapi_request_sense(qc);
2932 return;
2933 } else if (unlikely(err_mask)) {
2934 /* FIXME: not quite right; we don't want the
2935 * translation of taskfile registers into
2936 * a sense descriptors, since that's only
2937 * correct for ATA, not ATAPI
2938 */
2939 ata_gen_passthru_sense(qc);
2940 } else {
2941 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2942 atapi_fixup_inquiry(cmd);
2943 cmd->result = SAM_STAT_GOOD;
2944 }
2945
2946 ata_qc_done(qc);
2947 }
2948 /**
2949 * atapi_xlat - Initialize PACKET taskfile
2950 * @qc: command structure to be initialized
2951 *
2952 * LOCKING:
2953 * spin_lock_irqsave(host lock)
2954 *
2955 * RETURNS:
2956 * Zero on success, non-zero on failure.
2957 */
2958 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2959 {
2960 struct scsi_cmnd *scmd = qc->scsicmd;
2961 struct ata_device *dev = qc->dev;
2962 int nodata = (scmd->sc_data_direction == DMA_NONE);
2963 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2964 unsigned int nbytes;
2965
2966 memset(qc->cdb, 0, dev->cdb_len);
2967 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2968
2969 qc->complete_fn = atapi_qc_complete;
2970
2971 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2972 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2973 qc->tf.flags |= ATA_TFLAG_WRITE;
2974 DPRINTK("direction: write\n");
2975 }
2976
2977 qc->tf.command = ATA_CMD_PACKET;
2978 ata_qc_set_pc_nbytes(qc);
2979
2980 /* check whether ATAPI DMA is safe */
2981 if (!nodata && !using_pio && atapi_check_dma(qc))
2982 using_pio = 1;
2983
2984 /* Some controller variants snoop this value for Packet
2985 * transfers to do state machine and FIFO management. Thus we
2986 * want to set it properly, and for DMA where it is
2987 * effectively meaningless.
2988 */
2989 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2990
2991 /* Most ATAPI devices which honor transfer chunk size don't
2992 * behave according to the spec when odd chunk size which
2993 * matches the transfer length is specified. If the number of
2994 * bytes to transfer is 2n+1. According to the spec, what
2995 * should happen is to indicate that 2n+1 is going to be
2996 * transferred and transfer 2n+2 bytes where the last byte is
2997 * padding.
2998 *
2999 * In practice, this doesn't happen. ATAPI devices first
3000 * indicate and transfer 2n bytes and then indicate and
3001 * transfer 2 bytes where the last byte is padding.
3002 *
3003 * This inconsistency confuses several controllers which
3004 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3005 * These controllers use actual number of transferred bytes to
3006 * update DMA pointer and transfer of 4n+2 bytes make those
3007 * controller push DMA pointer by 4n+4 bytes because SATA data
3008 * FISes are aligned to 4 bytes. This causes data corruption
3009 * and buffer overrun.
3010 *
3011 * Always setting nbytes to even number solves this problem
3012 * because then ATAPI devices don't have to split data at 2n
3013 * boundaries.
3014 */
3015 if (nbytes & 0x1)
3016 nbytes++;
3017
3018 qc->tf.lbam = (nbytes & 0xFF);
3019 qc->tf.lbah = (nbytes >> 8);
3020
3021 if (nodata)
3022 qc->tf.protocol = ATAPI_PROT_NODATA;
3023 else if (using_pio)
3024 qc->tf.protocol = ATAPI_PROT_PIO;
3025 else {
3026 /* DMA data xfer */
3027 qc->tf.protocol = ATAPI_PROT_DMA;
3028 qc->tf.feature |= ATAPI_PKT_DMA;
3029
3030 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3031 (scmd->sc_data_direction != DMA_TO_DEVICE))
3032 /* some SATA bridges need us to indicate data xfer direction */
3033 qc->tf.feature |= ATAPI_DMADIR;
3034 }
3035
3036
3037 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3038 as ATAPI tape drives don't get this right otherwise */
3039 return 0;
3040 }
3041
3042 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3043 {
3044 if (!sata_pmp_attached(ap)) {
3045 if (likely(devno >= 0 &&
3046 devno < ata_link_max_devices(&ap->link)))
3047 return &ap->link.device[devno];
3048 } else {
3049 if (likely(devno >= 0 &&
3050 devno < ap->nr_pmp_links))
3051 return &ap->pmp_link[devno].device[0];
3052 }
3053
3054 return NULL;
3055 }
3056
3057 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3058 const struct scsi_device *scsidev)
3059 {
3060 int devno;
3061
3062 /* skip commands not addressed to targets we simulate */
3063 if (!sata_pmp_attached(ap)) {
3064 if (unlikely(scsidev->channel || scsidev->lun))
3065 return NULL;
3066 devno = scsidev->id;
3067 } else {
3068 if (unlikely(scsidev->id || scsidev->lun))
3069 return NULL;
3070 devno = scsidev->channel;
3071 }
3072
3073 return ata_find_dev(ap, devno);
3074 }
3075
3076 /**
3077 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3078 * @ap: ATA port to which the device is attached
3079 * @scsidev: SCSI device from which we derive the ATA device
3080 *
3081 * Given various information provided in struct scsi_cmnd,
3082 * map that onto an ATA bus, and using that mapping
3083 * determine which ata_device is associated with the
3084 * SCSI command to be sent.
3085 *
3086 * LOCKING:
3087 * spin_lock_irqsave(host lock)
3088 *
3089 * RETURNS:
3090 * Associated ATA device, or %NULL if not found.
3091 */
3092 static struct ata_device *
3093 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3094 {
3095 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3096
3097 if (unlikely(!dev || !ata_dev_enabled(dev)))
3098 return NULL;
3099
3100 return dev;
3101 }
3102
3103 /*
3104 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3105 * @byte1: Byte 1 from pass-thru CDB.
3106 *
3107 * RETURNS:
3108 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3109 */
3110 static u8
3111 ata_scsi_map_proto(u8 byte1)
3112 {
3113 switch((byte1 & 0x1e) >> 1) {
3114 case 3: /* Non-data */
3115 return ATA_PROT_NODATA;
3116
3117 case 6: /* DMA */
3118 case 10: /* UDMA Data-in */
3119 case 11: /* UDMA Data-Out */
3120 return ATA_PROT_DMA;
3121
3122 case 4: /* PIO Data-in */
3123 case 5: /* PIO Data-out */
3124 return ATA_PROT_PIO;
3125
3126 case 12: /* FPDMA */
3127 return ATA_PROT_NCQ;
3128
3129 case 0: /* Hard Reset */
3130 case 1: /* SRST */
3131 case 8: /* Device Diagnostic */
3132 case 9: /* Device Reset */
3133 case 7: /* DMA Queued */
3134 case 15: /* Return Response Info */
3135 default: /* Reserved */
3136 break;
3137 }
3138
3139 return ATA_PROT_UNKNOWN;
3140 }
3141
3142 /**
3143 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3144 * @qc: command structure to be initialized
3145 *
3146 * Handles either 12, 16, or 32-byte versions of the CDB.
3147 *
3148 * RETURNS:
3149 * Zero on success, non-zero on failure.
3150 */
3151 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3152 {
3153 struct ata_taskfile *tf = &(qc->tf);
3154 struct scsi_cmnd *scmd = qc->scsicmd;
3155 struct ata_device *dev = qc->dev;
3156 const u8 *cdb = scmd->cmnd;
3157 u16 fp;
3158 u16 cdb_offset = 0;
3159
3160 /* 7Fh variable length cmd means a ata pass-thru(32) */
3161 if (cdb[0] == VARIABLE_LENGTH_CMD)
3162 cdb_offset = 9;
3163
3164 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3165 if (tf->protocol == ATA_PROT_UNKNOWN) {
3166 fp = 1;
3167 goto invalid_fld;
3168 }
3169
3170 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0)
3171 tf->protocol = ATA_PROT_NCQ_NODATA;
3172
3173 /* enable LBA */
3174 tf->flags |= ATA_TFLAG_LBA;
3175
3176 /*
3177 * 12 and 16 byte CDBs use different offsets to
3178 * provide the various register values.
3179 */
3180 if (cdb[0] == ATA_16) {
3181 /*
3182 * 16-byte CDB - may contain extended commands.
3183 *
3184 * If that is the case, copy the upper byte register values.
3185 */
3186 if (cdb[1] & 0x01) {
3187 tf->hob_feature = cdb[3];
3188 tf->hob_nsect = cdb[5];
3189 tf->hob_lbal = cdb[7];
3190 tf->hob_lbam = cdb[9];
3191 tf->hob_lbah = cdb[11];
3192 tf->flags |= ATA_TFLAG_LBA48;
3193 } else
3194 tf->flags &= ~ATA_TFLAG_LBA48;
3195
3196 /*
3197 * Always copy low byte, device and command registers.
3198 */
3199 tf->feature = cdb[4];
3200 tf->nsect = cdb[6];
3201 tf->lbal = cdb[8];
3202 tf->lbam = cdb[10];
3203 tf->lbah = cdb[12];
3204 tf->device = cdb[13];
3205 tf->command = cdb[14];
3206 } else if (cdb[0] == ATA_12) {
3207 /*
3208 * 12-byte CDB - incapable of extended commands.
3209 */
3210 tf->flags &= ~ATA_TFLAG_LBA48;
3211
3212 tf->feature = cdb[3];
3213 tf->nsect = cdb[4];
3214 tf->lbal = cdb[5];
3215 tf->lbam = cdb[6];
3216 tf->lbah = cdb[7];
3217 tf->device = cdb[8];
3218 tf->command = cdb[9];
3219 } else {
3220 /*
3221 * 32-byte CDB - may contain extended command fields.
3222 *
3223 * If that is the case, copy the upper byte register values.
3224 */
3225 if (cdb[10] & 0x01) {
3226 tf->hob_feature = cdb[20];
3227 tf->hob_nsect = cdb[22];
3228 tf->hob_lbal = cdb[16];
3229 tf->hob_lbam = cdb[15];
3230 tf->hob_lbah = cdb[14];
3231 tf->flags |= ATA_TFLAG_LBA48;
3232 } else
3233 tf->flags &= ~ATA_TFLAG_LBA48;
3234
3235 tf->feature = cdb[21];
3236 tf->nsect = cdb[23];
3237 tf->lbal = cdb[19];
3238 tf->lbam = cdb[18];
3239 tf->lbah = cdb[17];
3240 tf->device = cdb[24];
3241 tf->command = cdb[25];
3242 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3243 }
3244
3245 /* For NCQ commands copy the tag value */
3246 if (ata_is_ncq(tf->protocol))
3247 tf->nsect = qc->hw_tag << 3;
3248
3249 /* enforce correct master/slave bit */
3250 tf->device = dev->devno ?
3251 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3252
3253 switch (tf->command) {
3254 /* READ/WRITE LONG use a non-standard sect_size */
3255 case ATA_CMD_READ_LONG:
3256 case ATA_CMD_READ_LONG_ONCE:
3257 case ATA_CMD_WRITE_LONG:
3258 case ATA_CMD_WRITE_LONG_ONCE:
3259 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3260 fp = 1;
3261 goto invalid_fld;
3262 }
3263 qc->sect_size = scsi_bufflen(scmd);
3264 break;
3265
3266 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3267 case ATA_CMD_CFA_WRITE_NE:
3268 case ATA_CMD_CFA_TRANS_SECT:
3269 case ATA_CMD_CFA_WRITE_MULT_NE:
3270 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3271 case ATA_CMD_READ:
3272 case ATA_CMD_READ_EXT:
3273 case ATA_CMD_READ_QUEUED:
3274 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3275 case ATA_CMD_FPDMA_READ:
3276 case ATA_CMD_READ_MULTI:
3277 case ATA_CMD_READ_MULTI_EXT:
3278 case ATA_CMD_PIO_READ:
3279 case ATA_CMD_PIO_READ_EXT:
3280 case ATA_CMD_READ_STREAM_DMA_EXT:
3281 case ATA_CMD_READ_STREAM_EXT:
3282 case ATA_CMD_VERIFY:
3283 case ATA_CMD_VERIFY_EXT:
3284 case ATA_CMD_WRITE:
3285 case ATA_CMD_WRITE_EXT:
3286 case ATA_CMD_WRITE_FUA_EXT:
3287 case ATA_CMD_WRITE_QUEUED:
3288 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3289 case ATA_CMD_FPDMA_WRITE:
3290 case ATA_CMD_WRITE_MULTI:
3291 case ATA_CMD_WRITE_MULTI_EXT:
3292 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3293 case ATA_CMD_PIO_WRITE:
3294 case ATA_CMD_PIO_WRITE_EXT:
3295 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3296 case ATA_CMD_WRITE_STREAM_EXT:
3297 qc->sect_size = scmd->device->sector_size;
3298 break;
3299
3300 /* Everything else uses 512 byte "sectors" */
3301 default:
3302 qc->sect_size = ATA_SECT_SIZE;
3303 }
3304
3305 /*
3306 * Set flags so that all registers will be written, pass on
3307 * write indication (used for PIO/DMA setup), result TF is
3308 * copied back and we don't whine too much about its failure.
3309 */
3310 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3311 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3312 tf->flags |= ATA_TFLAG_WRITE;
3313
3314 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3315
3316 /*
3317 * Set transfer length.
3318 *
3319 * TODO: find out if we need to do more here to
3320 * cover scatter/gather case.
3321 */
3322 ata_qc_set_pc_nbytes(qc);
3323
3324 /* We may not issue DMA commands if no DMA mode is set */
3325 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3326 fp = 1;
3327 goto invalid_fld;
3328 }
3329
3330 /* We may not issue NCQ commands to devices not supporting NCQ */
3331 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3332 fp = 1;
3333 goto invalid_fld;
3334 }
3335
3336 /* sanity check for pio multi commands */
3337 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3338 fp = 1;
3339 goto invalid_fld;
3340 }
3341
3342 if (is_multi_taskfile(tf)) {
3343 unsigned int multi_count = 1 << (cdb[1] >> 5);
3344
3345 /* compare the passed through multi_count
3346 * with the cached multi_count of libata
3347 */
3348 if (multi_count != dev->multi_count)
3349 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3350 multi_count);
3351 }
3352
3353 /*
3354 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3355 * SET_FEATURES - XFER MODE must be preceded/succeeded
3356 * by an update to hardware-specific registers for each
3357 * controller (i.e. the reason for ->set_piomode(),
3358 * ->set_dmamode(), and ->post_set_mode() hooks).
3359 */
3360 if (tf->command == ATA_CMD_SET_FEATURES &&
3361 tf->feature == SETFEATURES_XFER) {
3362 fp = (cdb[0] == ATA_16) ? 4 : 3;
3363 goto invalid_fld;
3364 }
3365
3366 /*
3367 * Filter TPM commands by default. These provide an
3368 * essentially uncontrolled encrypted "back door" between
3369 * applications and the disk. Set libata.allow_tpm=1 if you
3370 * have a real reason for wanting to use them. This ensures
3371 * that installed software cannot easily mess stuff up without
3372 * user intent. DVR type users will probably ship with this enabled
3373 * for movie content management.
3374 *
3375 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3376 * for this and should do in future but that it is not sufficient as
3377 * DCS is an optional feature set. Thus we also do the software filter
3378 * so that we comply with the TC consortium stated goal that the user
3379 * can turn off TC features of their system.
3380 */
3381 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3382 fp = (cdb[0] == ATA_16) ? 14 : 9;
3383 goto invalid_fld;
3384 }
3385
3386 return 0;
3387
3388 invalid_fld:
3389 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3390 return 1;
3391 }
3392
3393 /**
3394 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3395 * @cmd: SCSI command being translated
3396 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3397 * @sector: Starting sector
3398 * @count: Total Range of request in logical sectors
3399 *
3400 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3401 * descriptor.
3402 *
3403 * Upto 64 entries of the format:
3404 * 63:48 Range Length
3405 * 47:0 LBA
3406 *
3407 * Range Length of 0 is ignored.
3408 * LBA's should be sorted order and not overlap.
3409 *
3410 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3411 *
3412 * Return: Number of bytes copied into sglist.
3413 */
3414 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3415 u64 sector, u32 count)
3416 {
3417 struct scsi_device *sdp = cmd->device;
3418 size_t len = sdp->sector_size;
3419 size_t r;
3420 __le64 *buf;
3421 u32 i = 0;
3422 unsigned long flags;
3423
3424 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3425
3426 if (len > ATA_SCSI_RBUF_SIZE)
3427 len = ATA_SCSI_RBUF_SIZE;
3428
3429 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3430 buf = ((void *)ata_scsi_rbuf);
3431 memset(buf, 0, len);
3432 while (i < trmax) {
3433 u64 entry = sector |
3434 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3435 buf[i++] = __cpu_to_le64(entry);
3436 if (count <= 0xffff)
3437 break;
3438 count -= 0xffff;
3439 sector += 0xffff;
3440 }
3441 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3442 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3443
3444 return r;
3445 }
3446
3447 /**
3448 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3449 * @qc: Command to be translated
3450 *
3451 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3452 * an SCT Write Same command.
3453 * Based on WRITE SAME has the UNMAP flag:
3454 *
3455 * - When set translate to DSM TRIM
3456 * - When clear translate to SCT Write Same
3457 */
3458 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3459 {
3460 struct ata_taskfile *tf = &qc->tf;
3461 struct scsi_cmnd *scmd = qc->scsicmd;
3462 struct scsi_device *sdp = scmd->device;
3463 size_t len = sdp->sector_size;
3464 struct ata_device *dev = qc->dev;
3465 const u8 *cdb = scmd->cmnd;
3466 u64 block;
3467 u32 n_block;
3468 const u32 trmax = len >> 3;
3469 u32 size;
3470 u16 fp;
3471 u8 bp = 0xff;
3472 u8 unmap = cdb[1] & 0x8;
3473
3474 /* we may not issue DMA commands if no DMA mode is set */
3475 if (unlikely(!dev->dma_mode))
3476 goto invalid_opcode;
3477
3478 /*
3479 * We only allow sending this command through the block layer,
3480 * as it modifies the DATA OUT buffer, which would corrupt user
3481 * memory for SG_IO commands.
3482 */
3483 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3484 goto invalid_opcode;
3485
3486 if (unlikely(scmd->cmd_len < 16)) {
3487 fp = 15;
3488 goto invalid_fld;
3489 }
3490 scsi_16_lba_len(cdb, &block, &n_block);
3491
3492 if (!unmap ||
3493 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3494 !ata_id_has_trim(dev->id)) {
3495 fp = 1;
3496 bp = 3;
3497 goto invalid_fld;
3498 }
3499 /* If the request is too large the cmd is invalid */
3500 if (n_block > 0xffff * trmax) {
3501 fp = 2;
3502 goto invalid_fld;
3503 }
3504
3505 /*
3506 * WRITE SAME always has a sector sized buffer as payload, this
3507 * should never be a multiple entry S/G list.
3508 */
3509 if (!scsi_sg_count(scmd))
3510 goto invalid_param_len;
3511
3512 /*
3513 * size must match sector size in bytes
3514 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3515 * is defined as number of 512 byte blocks to be transferred.
3516 */
3517
3518 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3519 if (size != len)
3520 goto invalid_param_len;
3521
3522 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3523 /* Newer devices support queued TRIM commands */
3524 tf->protocol = ATA_PROT_NCQ;
3525 tf->command = ATA_CMD_FPDMA_SEND;
3526 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3527 tf->nsect = qc->hw_tag << 3;
3528 tf->hob_feature = (size / 512) >> 8;
3529 tf->feature = size / 512;
3530
3531 tf->auxiliary = 1;
3532 } else {
3533 tf->protocol = ATA_PROT_DMA;
3534 tf->hob_feature = 0;
3535 tf->feature = ATA_DSM_TRIM;
3536 tf->hob_nsect = (size / 512) >> 8;
3537 tf->nsect = size / 512;
3538 tf->command = ATA_CMD_DSM;
3539 }
3540
3541 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3542 ATA_TFLAG_WRITE;
3543
3544 ata_qc_set_pc_nbytes(qc);
3545
3546 return 0;
3547
3548 invalid_fld:
3549 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3550 return 1;
3551 invalid_param_len:
3552 /* "Parameter list length error" */
3553 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3554 return 1;
3555 invalid_opcode:
3556 /* "Invalid command operation code" */
3557 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3558 return 1;
3559 }
3560
3561 /**
3562 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3563 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3564 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3565 *
3566 * Yields a subset to satisfy scsi_report_opcode()
3567 *
3568 * LOCKING:
3569 * spin_lock_irqsave(host lock)
3570 */
3571 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3572 {
3573 struct ata_device *dev = args->dev;
3574 u8 *cdb = args->cmd->cmnd;
3575 u8 supported = 0;
3576 unsigned int err = 0;
3577
3578 if (cdb[2] != 1) {
3579 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3580 err = 2;
3581 goto out;
3582 }
3583 switch (cdb[3]) {
3584 case INQUIRY:
3585 case MODE_SENSE:
3586 case MODE_SENSE_10:
3587 case READ_CAPACITY:
3588 case SERVICE_ACTION_IN_16:
3589 case REPORT_LUNS:
3590 case REQUEST_SENSE:
3591 case SYNCHRONIZE_CACHE:
3592 case REZERO_UNIT:
3593 case SEEK_6:
3594 case SEEK_10:
3595 case TEST_UNIT_READY:
3596 case SEND_DIAGNOSTIC:
3597 case MAINTENANCE_IN:
3598 case READ_6:
3599 case READ_10:
3600 case READ_16:
3601 case WRITE_6:
3602 case WRITE_10:
3603 case WRITE_16:
3604 case ATA_12:
3605 case ATA_16:
3606 case VERIFY:
3607 case VERIFY_16:
3608 case MODE_SELECT:
3609 case MODE_SELECT_10:
3610 case START_STOP:
3611 supported = 3;
3612 break;
3613 case ZBC_IN:
3614 case ZBC_OUT:
3615 if (ata_id_zoned_cap(dev->id) ||
3616 dev->class == ATA_DEV_ZAC)
3617 supported = 3;
3618 break;
3619 case SECURITY_PROTOCOL_IN:
3620 case SECURITY_PROTOCOL_OUT:
3621 if (dev->flags & ATA_DFLAG_TRUSTED)
3622 supported = 3;
3623 break;
3624 default:
3625 break;
3626 }
3627 out:
3628 rbuf[1] = supported; /* supported */
3629 return err;
3630 }
3631
3632 /**
3633 * ata_scsi_report_zones_complete - convert ATA output
3634 * @qc: command structure returning the data
3635 *
3636 * Convert T-13 little-endian field representation into
3637 * T-10 big-endian field representation.
3638 * What a mess.
3639 */
3640 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3641 {
3642 struct scsi_cmnd *scmd = qc->scsicmd;
3643 struct sg_mapping_iter miter;
3644 unsigned long flags;
3645 unsigned int bytes = 0;
3646
3647 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3648 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3649
3650 local_irq_save(flags);
3651 while (sg_miter_next(&miter)) {
3652 unsigned int offset = 0;
3653
3654 if (bytes == 0) {
3655 char *hdr;
3656 u32 list_length;
3657 u64 max_lba, opt_lba;
3658 u16 same;
3659
3660 /* Swizzle header */
3661 hdr = miter.addr;
3662 list_length = get_unaligned_le32(&hdr[0]);
3663 same = get_unaligned_le16(&hdr[4]);
3664 max_lba = get_unaligned_le64(&hdr[8]);
3665 opt_lba = get_unaligned_le64(&hdr[16]);
3666 put_unaligned_be32(list_length, &hdr[0]);
3667 hdr[4] = same & 0xf;
3668 put_unaligned_be64(max_lba, &hdr[8]);
3669 put_unaligned_be64(opt_lba, &hdr[16]);
3670 offset += 64;
3671 bytes += 64;
3672 }
3673 while (offset < miter.length) {
3674 char *rec;
3675 u8 cond, type, non_seq, reset;
3676 u64 size, start, wp;
3677
3678 /* Swizzle zone descriptor */
3679 rec = miter.addr + offset;
3680 type = rec[0] & 0xf;
3681 cond = (rec[1] >> 4) & 0xf;
3682 non_seq = (rec[1] & 2);
3683 reset = (rec[1] & 1);
3684 size = get_unaligned_le64(&rec[8]);
3685 start = get_unaligned_le64(&rec[16]);
3686 wp = get_unaligned_le64(&rec[24]);
3687 rec[0] = type;
3688 rec[1] = (cond << 4) | non_seq | reset;
3689 put_unaligned_be64(size, &rec[8]);
3690 put_unaligned_be64(start, &rec[16]);
3691 put_unaligned_be64(wp, &rec[24]);
3692 WARN_ON(offset + 64 > miter.length);
3693 offset += 64;
3694 bytes += 64;
3695 }
3696 }
3697 sg_miter_stop(&miter);
3698 local_irq_restore(flags);
3699
3700 ata_scsi_qc_complete(qc);
3701 }
3702
3703 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3704 {
3705 struct ata_taskfile *tf = &qc->tf;
3706 struct scsi_cmnd *scmd = qc->scsicmd;
3707 const u8 *cdb = scmd->cmnd;
3708 u16 sect, fp = (u16)-1;
3709 u8 sa, options, bp = 0xff;
3710 u64 block;
3711 u32 n_block;
3712
3713 if (unlikely(scmd->cmd_len < 16)) {
3714 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3715 scmd->cmd_len);
3716 fp = 15;
3717 goto invalid_fld;
3718 }
3719 scsi_16_lba_len(cdb, &block, &n_block);
3720 if (n_block != scsi_bufflen(scmd)) {
3721 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3722 n_block, scsi_bufflen(scmd));
3723 goto invalid_param_len;
3724 }
3725 sa = cdb[1] & 0x1f;
3726 if (sa != ZI_REPORT_ZONES) {
3727 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3728 fp = 1;
3729 goto invalid_fld;
3730 }
3731 /*
3732 * ZAC allows only for transfers in 512 byte blocks,
3733 * and uses a 16 bit value for the transfer count.
3734 */
3735 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3736 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3737 goto invalid_param_len;
3738 }
3739 sect = n_block / 512;
3740 options = cdb[14] & 0xbf;
3741
3742 if (ata_ncq_enabled(qc->dev) &&
3743 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3744 tf->protocol = ATA_PROT_NCQ;
3745 tf->command = ATA_CMD_FPDMA_RECV;
3746 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3747 tf->nsect = qc->hw_tag << 3;
3748 tf->feature = sect & 0xff;
3749 tf->hob_feature = (sect >> 8) & 0xff;
3750 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3751 } else {
3752 tf->command = ATA_CMD_ZAC_MGMT_IN;
3753 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3754 tf->protocol = ATA_PROT_DMA;
3755 tf->hob_feature = options;
3756 tf->hob_nsect = (sect >> 8) & 0xff;
3757 tf->nsect = sect & 0xff;
3758 }
3759 tf->device = ATA_LBA;
3760 tf->lbah = (block >> 16) & 0xff;
3761 tf->lbam = (block >> 8) & 0xff;
3762 tf->lbal = block & 0xff;
3763 tf->hob_lbah = (block >> 40) & 0xff;
3764 tf->hob_lbam = (block >> 32) & 0xff;
3765 tf->hob_lbal = (block >> 24) & 0xff;
3766
3767 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3768 qc->flags |= ATA_QCFLAG_RESULT_TF;
3769
3770 ata_qc_set_pc_nbytes(qc);
3771
3772 qc->complete_fn = ata_scsi_report_zones_complete;
3773
3774 return 0;
3775
3776 invalid_fld:
3777 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3778 return 1;
3779
3780 invalid_param_len:
3781 /* "Parameter list length error" */
3782 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3783 return 1;
3784 }
3785
3786 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3787 {
3788 struct ata_taskfile *tf = &qc->tf;
3789 struct scsi_cmnd *scmd = qc->scsicmd;
3790 struct ata_device *dev = qc->dev;
3791 const u8 *cdb = scmd->cmnd;
3792 u8 all, sa;
3793 u64 block;
3794 u32 n_block;
3795 u16 fp = (u16)-1;
3796
3797 if (unlikely(scmd->cmd_len < 16)) {
3798 fp = 15;
3799 goto invalid_fld;
3800 }
3801
3802 sa = cdb[1] & 0x1f;
3803 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3804 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3805 fp = 1;
3806 goto invalid_fld;
3807 }
3808
3809 scsi_16_lba_len(cdb, &block, &n_block);
3810 if (n_block) {
3811 /*
3812 * ZAC MANAGEMENT OUT doesn't define any length
3813 */
3814 goto invalid_param_len;
3815 }
3816
3817 all = cdb[14] & 0x1;
3818 if (all) {
3819 /*
3820 * Ignore the block address (zone ID) as defined by ZBC.
3821 */
3822 block = 0;
3823 } else if (block >= dev->n_sectors) {
3824 /*
3825 * Block must be a valid zone ID (a zone start LBA).
3826 */
3827 fp = 2;
3828 goto invalid_fld;
3829 }
3830
3831 if (ata_ncq_enabled(qc->dev) &&
3832 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3833 tf->protocol = ATA_PROT_NCQ_NODATA;
3834 tf->command = ATA_CMD_NCQ_NON_DATA;
3835 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3836 tf->nsect = qc->hw_tag << 3;
3837 tf->auxiliary = sa | ((u16)all << 8);
3838 } else {
3839 tf->protocol = ATA_PROT_NODATA;
3840 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3841 tf->feature = sa;
3842 tf->hob_feature = all;
3843 }
3844 tf->lbah = (block >> 16) & 0xff;
3845 tf->lbam = (block >> 8) & 0xff;
3846 tf->lbal = block & 0xff;
3847 tf->hob_lbah = (block >> 40) & 0xff;
3848 tf->hob_lbam = (block >> 32) & 0xff;
3849 tf->hob_lbal = (block >> 24) & 0xff;
3850 tf->device = ATA_LBA;
3851 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3852
3853 return 0;
3854
3855 invalid_fld:
3856 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3857 return 1;
3858 invalid_param_len:
3859 /* "Parameter list length error" */
3860 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3861 return 1;
3862 }
3863
3864 /**
3865 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3866 * @qc: Storage for translated ATA taskfile
3867 * @buf: input buffer
3868 * @len: number of valid bytes in the input buffer
3869 * @fp: out parameter for the failed field on error
3870 *
3871 * Prepare a taskfile to modify caching information for the device.
3872 *
3873 * LOCKING:
3874 * None.
3875 */
3876 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3877 const u8 *buf, int len, u16 *fp)
3878 {
3879 struct ata_taskfile *tf = &qc->tf;
3880 struct ata_device *dev = qc->dev;
3881 u8 mpage[CACHE_MPAGE_LEN];
3882 u8 wce;
3883 int i;
3884
3885 /*
3886 * The first two bytes of def_cache_mpage are a header, so offsets
3887 * in mpage are off by 2 compared to buf. Same for len.
3888 */
3889
3890 if (len != CACHE_MPAGE_LEN - 2) {
3891 if (len < CACHE_MPAGE_LEN - 2)
3892 *fp = len;
3893 else
3894 *fp = CACHE_MPAGE_LEN - 2;
3895 return -EINVAL;
3896 }
3897
3898 wce = buf[0] & (1 << 2);
3899
3900 /*
3901 * Check that read-only bits are not modified.
3902 */
3903 ata_msense_caching(dev->id, mpage, false);
3904 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3905 if (i == 0)
3906 continue;
3907 if (mpage[i + 2] != buf[i]) {
3908 *fp = i;
3909 return -EINVAL;
3910 }
3911 }
3912
3913 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3914 tf->protocol = ATA_PROT_NODATA;
3915 tf->nsect = 0;
3916 tf->command = ATA_CMD_SET_FEATURES;
3917 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3918 return 0;
3919 }
3920
3921 /**
3922 * ata_mselect_control - Simulate MODE SELECT for control page
3923 * @qc: Storage for translated ATA taskfile
3924 * @buf: input buffer
3925 * @len: number of valid bytes in the input buffer
3926 * @fp: out parameter for the failed field on error
3927 *
3928 * Prepare a taskfile to modify caching information for the device.
3929 *
3930 * LOCKING:
3931 * None.
3932 */
3933 static int ata_mselect_control(struct ata_queued_cmd *qc,
3934 const u8 *buf, int len, u16 *fp)
3935 {
3936 struct ata_device *dev = qc->dev;
3937 u8 mpage[CONTROL_MPAGE_LEN];
3938 u8 d_sense;
3939 int i;
3940
3941 /*
3942 * The first two bytes of def_control_mpage are a header, so offsets
3943 * in mpage are off by 2 compared to buf. Same for len.
3944 */
3945
3946 if (len != CONTROL_MPAGE_LEN - 2) {
3947 if (len < CONTROL_MPAGE_LEN - 2)
3948 *fp = len;
3949 else
3950 *fp = CONTROL_MPAGE_LEN - 2;
3951 return -EINVAL;
3952 }
3953
3954 d_sense = buf[0] & (1 << 2);
3955
3956 /*
3957 * Check that read-only bits are not modified.
3958 */
3959 ata_msense_control(dev, mpage, false);
3960 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3961 if (i == 0)
3962 continue;
3963 if (mpage[2 + i] != buf[i]) {
3964 *fp = i;
3965 return -EINVAL;
3966 }
3967 }
3968 if (d_sense & (1 << 2))
3969 dev->flags |= ATA_DFLAG_D_SENSE;
3970 else
3971 dev->flags &= ~ATA_DFLAG_D_SENSE;
3972 return 0;
3973 }
3974
3975 /**
3976 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3977 * @qc: Storage for translated ATA taskfile
3978 *
3979 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3980 * Assume this is invoked for direct access devices (e.g. disks) only.
3981 * There should be no block descriptor for other device types.
3982 *
3983 * LOCKING:
3984 * spin_lock_irqsave(host lock)
3985 */
3986 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3987 {
3988 struct scsi_cmnd *scmd = qc->scsicmd;
3989 const u8 *cdb = scmd->cmnd;
3990 const u8 *p;
3991 u8 pg, spg;
3992 unsigned six_byte, pg_len, hdr_len, bd_len;
3993 int len;
3994 u16 fp = (u16)-1;
3995 u8 bp = 0xff;
3996
3997 VPRINTK("ENTER\n");
3998
3999 six_byte = (cdb[0] == MODE_SELECT);
4000 if (six_byte) {
4001 if (scmd->cmd_len < 5) {
4002 fp = 4;
4003 goto invalid_fld;
4004 }
4005
4006 len = cdb[4];
4007 hdr_len = 4;
4008 } else {
4009 if (scmd->cmd_len < 9) {
4010 fp = 8;
4011 goto invalid_fld;
4012 }
4013
4014 len = (cdb[7] << 8) + cdb[8];
4015 hdr_len = 8;
4016 }
4017
4018 /* We only support PF=1, SP=0. */
4019 if ((cdb[1] & 0x11) != 0x10) {
4020 fp = 1;
4021 bp = (cdb[1] & 0x01) ? 1 : 5;
4022 goto invalid_fld;
4023 }
4024
4025 /* Test early for possible overrun. */
4026 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4027 goto invalid_param_len;
4028
4029 p = page_address(sg_page(scsi_sglist(scmd)));
4030
4031 /* Move past header and block descriptors. */
4032 if (len < hdr_len)
4033 goto invalid_param_len;
4034
4035 if (six_byte)
4036 bd_len = p[3];
4037 else
4038 bd_len = (p[6] << 8) + p[7];
4039
4040 len -= hdr_len;
4041 p += hdr_len;
4042 if (len < bd_len)
4043 goto invalid_param_len;
4044 if (bd_len != 0 && bd_len != 8) {
4045 fp = (six_byte) ? 3 : 6;
4046 fp += bd_len + hdr_len;
4047 goto invalid_param;
4048 }
4049
4050 len -= bd_len;
4051 p += bd_len;
4052 if (len == 0)
4053 goto skip;
4054
4055 /* Parse both possible formats for the mode page headers. */
4056 pg = p[0] & 0x3f;
4057 if (p[0] & 0x40) {
4058 if (len < 4)
4059 goto invalid_param_len;
4060
4061 spg = p[1];
4062 pg_len = (p[2] << 8) | p[3];
4063 p += 4;
4064 len -= 4;
4065 } else {
4066 if (len < 2)
4067 goto invalid_param_len;
4068
4069 spg = 0;
4070 pg_len = p[1];
4071 p += 2;
4072 len -= 2;
4073 }
4074
4075 /*
4076 * No mode subpages supported (yet) but asking for _all_
4077 * subpages may be valid
4078 */
4079 if (spg && (spg != ALL_SUB_MPAGES)) {
4080 fp = (p[0] & 0x40) ? 1 : 0;
4081 fp += hdr_len + bd_len;
4082 goto invalid_param;
4083 }
4084 if (pg_len > len)
4085 goto invalid_param_len;
4086
4087 switch (pg) {
4088 case CACHE_MPAGE:
4089 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4090 fp += hdr_len + bd_len;
4091 goto invalid_param;
4092 }
4093 break;
4094 case CONTROL_MPAGE:
4095 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4096 fp += hdr_len + bd_len;
4097 goto invalid_param;
4098 } else {
4099 goto skip; /* No ATA command to send */
4100 }
4101 break;
4102 default: /* invalid page code */
4103 fp = bd_len + hdr_len;
4104 goto invalid_param;
4105 }
4106
4107 /*
4108 * Only one page has changeable data, so we only support setting one
4109 * page at a time.
4110 */
4111 if (len > pg_len)
4112 goto invalid_param;
4113
4114 return 0;
4115
4116 invalid_fld:
4117 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4118 return 1;
4119
4120 invalid_param:
4121 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4122 return 1;
4123
4124 invalid_param_len:
4125 /* "Parameter list length error" */
4126 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4127 return 1;
4128
4129 skip:
4130 scmd->result = SAM_STAT_GOOD;
4131 return 1;
4132 }
4133
4134 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
4135 {
4136 if (len == 0)
4137 return ATA_CMD_TRUSTED_NONDATA;
4138 else if (send)
4139 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
4140 else
4141 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
4142 }
4143
4144 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
4145 {
4146 struct scsi_cmnd *scmd = qc->scsicmd;
4147 const u8 *cdb = scmd->cmnd;
4148 struct ata_taskfile *tf = &qc->tf;
4149 u8 secp = cdb[1];
4150 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
4151 u16 spsp = get_unaligned_be16(&cdb[2]);
4152 u32 len = get_unaligned_be32(&cdb[6]);
4153 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4154
4155 /*
4156 * We don't support the ATA "security" protocol.
4157 */
4158 if (secp == 0xef) {
4159 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4160 return 1;
4161 }
4162
4163 if (cdb[4] & 7) { /* INC_512 */
4164 if (len > 0xffff) {
4165 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4166 return 1;
4167 }
4168 } else {
4169 if (len > 0x01fffe00) {
4170 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4171 return 1;
4172 }
4173
4174 /* convert to the sector-based ATA addressing */
4175 len = (len + 511) / 512;
4176 }
4177
4178 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4179 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4180 if (send)
4181 tf->flags |= ATA_TFLAG_WRITE;
4182 tf->command = ata_scsi_trusted_op(len, send, dma);
4183 tf->feature = secp;
4184 tf->lbam = spsp & 0xff;
4185 tf->lbah = spsp >> 8;
4186
4187 if (len) {
4188 tf->nsect = len & 0xff;
4189 tf->lbal = len >> 8;
4190 } else {
4191 if (!send)
4192 tf->lbah = (1 << 7);
4193 }
4194
4195 ata_qc_set_pc_nbytes(qc);
4196 return 0;
4197 }
4198
4199 /**
4200 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4201 * @qc: Command to be translated
4202 *
4203 * Translate a SCSI variable length CDB to specified commands.
4204 * It checks a service action value in CDB to call corresponding handler.
4205 *
4206 * RETURNS:
4207 * Zero on success, non-zero on failure
4208 *
4209 */
4210 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4211 {
4212 struct scsi_cmnd *scmd = qc->scsicmd;
4213 const u8 *cdb = scmd->cmnd;
4214 const u16 sa = get_unaligned_be16(&cdb[8]);
4215
4216 /*
4217 * if service action represents a ata pass-thru(32) command,
4218 * then pass it to ata_scsi_pass_thru handler.
4219 */
4220 if (sa == ATA_32)
4221 return ata_scsi_pass_thru(qc);
4222
4223 /* unsupported service action */
4224 return 1;
4225 }
4226
4227 /**
4228 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4229 * @dev: ATA device
4230 * @cmd: SCSI command opcode to consider
4231 *
4232 * Look up the SCSI command given, and determine whether the
4233 * SCSI command is to be translated or simulated.
4234 *
4235 * RETURNS:
4236 * Pointer to translation function if possible, %NULL if not.
4237 */
4238
4239 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4240 {
4241 switch (cmd) {
4242 case READ_6:
4243 case READ_10:
4244 case READ_16:
4245
4246 case WRITE_6:
4247 case WRITE_10:
4248 case WRITE_16:
4249 return ata_scsi_rw_xlat;
4250
4251 case WRITE_SAME_16:
4252 return ata_scsi_write_same_xlat;
4253
4254 case SYNCHRONIZE_CACHE:
4255 if (ata_try_flush_cache(dev))
4256 return ata_scsi_flush_xlat;
4257 break;
4258
4259 case VERIFY:
4260 case VERIFY_16:
4261 return ata_scsi_verify_xlat;
4262
4263 case ATA_12:
4264 case ATA_16:
4265 return ata_scsi_pass_thru;
4266
4267 case VARIABLE_LENGTH_CMD:
4268 return ata_scsi_var_len_cdb_xlat;
4269
4270 case MODE_SELECT:
4271 case MODE_SELECT_10:
4272 return ata_scsi_mode_select_xlat;
4273 break;
4274
4275 case ZBC_IN:
4276 return ata_scsi_zbc_in_xlat;
4277
4278 case ZBC_OUT:
4279 return ata_scsi_zbc_out_xlat;
4280
4281 case SECURITY_PROTOCOL_IN:
4282 case SECURITY_PROTOCOL_OUT:
4283 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4284 break;
4285 return ata_scsi_security_inout_xlat;
4286
4287 case START_STOP:
4288 return ata_scsi_start_stop_xlat;
4289 }
4290
4291 return NULL;
4292 }
4293
4294 /**
4295 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4296 * @ap: ATA port to which the command was being sent
4297 * @cmd: SCSI command to dump
4298 *
4299 * Prints the contents of a SCSI command via printk().
4300 */
4301
4302 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4303 struct scsi_cmnd *cmd)
4304 {
4305 #ifdef ATA_VERBOSE_DEBUG
4306 struct scsi_device *scsidev = cmd->device;
4307
4308 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4309 ap->print_id,
4310 scsidev->channel, scsidev->id, scsidev->lun,
4311 cmd->cmnd);
4312 #endif
4313 }
4314
4315 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4316 struct ata_device *dev)
4317 {
4318 u8 scsi_op = scmd->cmnd[0];
4319 ata_xlat_func_t xlat_func;
4320 int rc = 0;
4321
4322 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4323 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4324 goto bad_cdb_len;
4325
4326 xlat_func = ata_get_xlat_func(dev, scsi_op);
4327 } else {
4328 if (unlikely(!scmd->cmd_len))
4329 goto bad_cdb_len;
4330
4331 xlat_func = NULL;
4332 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4333 /* relay SCSI command to ATAPI device */
4334 int len = COMMAND_SIZE(scsi_op);
4335 if (unlikely(len > scmd->cmd_len ||
4336 len > dev->cdb_len ||
4337 scmd->cmd_len > ATAPI_CDB_LEN))
4338 goto bad_cdb_len;
4339
4340 xlat_func = atapi_xlat;
4341 } else {
4342 /* ATA_16 passthru, treat as an ATA command */
4343 if (unlikely(scmd->cmd_len > 16))
4344 goto bad_cdb_len;
4345
4346 xlat_func = ata_get_xlat_func(dev, scsi_op);
4347 }
4348 }
4349
4350 if (xlat_func)
4351 rc = ata_scsi_translate(dev, scmd, xlat_func);
4352 else
4353 ata_scsi_simulate(dev, scmd);
4354
4355 return rc;
4356
4357 bad_cdb_len:
4358 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4359 scmd->cmd_len, scsi_op, dev->cdb_len);
4360 scmd->result = DID_ERROR << 16;
4361 scmd->scsi_done(scmd);
4362 return 0;
4363 }
4364
4365 /**
4366 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4367 * @shost: SCSI host of command to be sent
4368 * @cmd: SCSI command to be sent
4369 *
4370 * In some cases, this function translates SCSI commands into
4371 * ATA taskfiles, and queues the taskfiles to be sent to
4372 * hardware. In other cases, this function simulates a
4373 * SCSI device by evaluating and responding to certain
4374 * SCSI commands. This creates the overall effect of
4375 * ATA and ATAPI devices appearing as SCSI devices.
4376 *
4377 * LOCKING:
4378 * ATA host lock
4379 *
4380 * RETURNS:
4381 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4382 * 0 otherwise.
4383 */
4384 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4385 {
4386 struct ata_port *ap;
4387 struct ata_device *dev;
4388 struct scsi_device *scsidev = cmd->device;
4389 int rc = 0;
4390 unsigned long irq_flags;
4391
4392 ap = ata_shost_to_port(shost);
4393
4394 spin_lock_irqsave(ap->lock, irq_flags);
4395
4396 ata_scsi_dump_cdb(ap, cmd);
4397
4398 dev = ata_scsi_find_dev(ap, scsidev);
4399 if (likely(dev))
4400 rc = __ata_scsi_queuecmd(cmd, dev);
4401 else {
4402 cmd->result = (DID_BAD_TARGET << 16);
4403 cmd->scsi_done(cmd);
4404 }
4405
4406 spin_unlock_irqrestore(ap->lock, irq_flags);
4407
4408 return rc;
4409 }
4410
4411 /**
4412 * ata_scsi_simulate - simulate SCSI command on ATA device
4413 * @dev: the target device
4414 * @cmd: SCSI command being sent to device.
4415 *
4416 * Interprets and directly executes a select list of SCSI commands
4417 * that can be handled internally.
4418 *
4419 * LOCKING:
4420 * spin_lock_irqsave(host lock)
4421 */
4422
4423 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4424 {
4425 struct ata_scsi_args args;
4426 const u8 *scsicmd = cmd->cmnd;
4427 u8 tmp8;
4428
4429 args.dev = dev;
4430 args.id = dev->id;
4431 args.cmd = cmd;
4432
4433 switch(scsicmd[0]) {
4434 case INQUIRY:
4435 if (scsicmd[1] & 2) /* is CmdDt set? */
4436 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4437 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4438 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4439 else switch (scsicmd[2]) {
4440 case 0x00:
4441 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4442 break;
4443 case 0x80:
4444 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4445 break;
4446 case 0x83:
4447 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4448 break;
4449 case 0x89:
4450 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4451 break;
4452 case 0xb0:
4453 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4454 break;
4455 case 0xb1:
4456 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4457 break;
4458 case 0xb2:
4459 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4460 break;
4461 case 0xb6:
4462 if (dev->flags & ATA_DFLAG_ZAC) {
4463 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4464 break;
4465 }
4466 /* Fallthrough */
4467 default:
4468 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4469 break;
4470 }
4471 break;
4472
4473 case MODE_SENSE:
4474 case MODE_SENSE_10:
4475 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4476 break;
4477
4478 case READ_CAPACITY:
4479 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4480 break;
4481
4482 case SERVICE_ACTION_IN_16:
4483 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4484 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4485 else
4486 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4487 break;
4488
4489 case REPORT_LUNS:
4490 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4491 break;
4492
4493 case REQUEST_SENSE:
4494 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4495 cmd->result = (DRIVER_SENSE << 24);
4496 break;
4497
4498 /* if we reach this, then writeback caching is disabled,
4499 * turning this into a no-op.
4500 */
4501 case SYNCHRONIZE_CACHE:
4502 /* fall through */
4503
4504 /* no-op's, complete with success */
4505 case REZERO_UNIT:
4506 case SEEK_6:
4507 case SEEK_10:
4508 case TEST_UNIT_READY:
4509 break;
4510
4511 case SEND_DIAGNOSTIC:
4512 tmp8 = scsicmd[1] & ~(1 << 3);
4513 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4514 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4515 break;
4516
4517 case MAINTENANCE_IN:
4518 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4519 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4520 else
4521 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4522 break;
4523
4524 /* all other commands */
4525 default:
4526 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4527 /* "Invalid command operation code" */
4528 break;
4529 }
4530
4531 cmd->scsi_done(cmd);
4532 }
4533
4534 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4535 {
4536 int i, rc;
4537
4538 for (i = 0; i < host->n_ports; i++) {
4539 struct ata_port *ap = host->ports[i];
4540 struct Scsi_Host *shost;
4541
4542 rc = -ENOMEM;
4543 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4544 if (!shost)
4545 goto err_alloc;
4546
4547 shost->eh_noresume = 1;
4548 *(struct ata_port **)&shost->hostdata[0] = ap;
4549 ap->scsi_host = shost;
4550
4551 shost->transportt = ata_scsi_transport_template;
4552 shost->unique_id = ap->print_id;
4553 shost->max_id = 16;
4554 shost->max_lun = 1;
4555 shost->max_channel = 1;
4556 shost->max_cmd_len = 32;
4557
4558 /* Schedule policy is determined by ->qc_defer()
4559 * callback and it needs to see every deferred qc.
4560 * Set host_blocked to 1 to prevent SCSI midlayer from
4561 * automatically deferring requests.
4562 */
4563 shost->max_host_blocked = 1;
4564
4565 rc = scsi_add_host_with_dma(ap->scsi_host,
4566 &ap->tdev, ap->host->dev);
4567 if (rc)
4568 goto err_add;
4569 }
4570
4571 return 0;
4572
4573 err_add:
4574 scsi_host_put(host->ports[i]->scsi_host);
4575 err_alloc:
4576 while (--i >= 0) {
4577 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4578
4579 scsi_remove_host(shost);
4580 scsi_host_put(shost);
4581 }
4582 return rc;
4583 }
4584
4585 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4586 {
4587 int tries = 5;
4588 struct ata_device *last_failed_dev = NULL;
4589 struct ata_link *link;
4590 struct ata_device *dev;
4591
4592 repeat:
4593 ata_for_each_link(link, ap, EDGE) {
4594 ata_for_each_dev(dev, link, ENABLED) {
4595 struct scsi_device *sdev;
4596 int channel = 0, id = 0;
4597
4598 if (dev->sdev)
4599 continue;
4600
4601 if (ata_is_host_link(link))
4602 id = dev->devno;
4603 else
4604 channel = link->pmp;
4605
4606 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4607 NULL);
4608 if (!IS_ERR(sdev)) {
4609 dev->sdev = sdev;
4610 scsi_device_put(sdev);
4611 } else {
4612 dev->sdev = NULL;
4613 }
4614 }
4615 }
4616
4617 /* If we scanned while EH was in progress or allocation
4618 * failure occurred, scan would have failed silently. Check
4619 * whether all devices are attached.
4620 */
4621 ata_for_each_link(link, ap, EDGE) {
4622 ata_for_each_dev(dev, link, ENABLED) {
4623 if (!dev->sdev)
4624 goto exit_loop;
4625 }
4626 }
4627 exit_loop:
4628 if (!link)
4629 return;
4630
4631 /* we're missing some SCSI devices */
4632 if (sync) {
4633 /* If caller requested synchrnous scan && we've made
4634 * any progress, sleep briefly and repeat.
4635 */
4636 if (dev != last_failed_dev) {
4637 msleep(100);
4638 last_failed_dev = dev;
4639 goto repeat;
4640 }
4641
4642 /* We might be failing to detect boot device, give it
4643 * a few more chances.
4644 */
4645 if (--tries) {
4646 msleep(100);
4647 goto repeat;
4648 }
4649
4650 ata_port_err(ap,
4651 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4652 }
4653
4654 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4655 round_jiffies_relative(HZ));
4656 }
4657
4658 /**
4659 * ata_scsi_offline_dev - offline attached SCSI device
4660 * @dev: ATA device to offline attached SCSI device for
4661 *
4662 * This function is called from ata_eh_hotplug() and responsible
4663 * for taking the SCSI device attached to @dev offline. This
4664 * function is called with host lock which protects dev->sdev
4665 * against clearing.
4666 *
4667 * LOCKING:
4668 * spin_lock_irqsave(host lock)
4669 *
4670 * RETURNS:
4671 * 1 if attached SCSI device exists, 0 otherwise.
4672 */
4673 int ata_scsi_offline_dev(struct ata_device *dev)
4674 {
4675 if (dev->sdev) {
4676 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4677 return 1;
4678 }
4679 return 0;
4680 }
4681
4682 /**
4683 * ata_scsi_remove_dev - remove attached SCSI device
4684 * @dev: ATA device to remove attached SCSI device for
4685 *
4686 * This function is called from ata_eh_scsi_hotplug() and
4687 * responsible for removing the SCSI device attached to @dev.
4688 *
4689 * LOCKING:
4690 * Kernel thread context (may sleep).
4691 */
4692 static void ata_scsi_remove_dev(struct ata_device *dev)
4693 {
4694 struct ata_port *ap = dev->link->ap;
4695 struct scsi_device *sdev;
4696 unsigned long flags;
4697
4698 /* Alas, we need to grab scan_mutex to ensure SCSI device
4699 * state doesn't change underneath us and thus
4700 * scsi_device_get() always succeeds. The mutex locking can
4701 * be removed if there is __scsi_device_get() interface which
4702 * increments reference counts regardless of device state.
4703 */
4704 mutex_lock(&ap->scsi_host->scan_mutex);
4705 spin_lock_irqsave(ap->lock, flags);
4706
4707 /* clearing dev->sdev is protected by host lock */
4708 sdev = dev->sdev;
4709 dev->sdev = NULL;
4710
4711 if (sdev) {
4712 /* If user initiated unplug races with us, sdev can go
4713 * away underneath us after the host lock and
4714 * scan_mutex are released. Hold onto it.
4715 */
4716 if (scsi_device_get(sdev) == 0) {
4717 /* The following ensures the attached sdev is
4718 * offline on return from ata_scsi_offline_dev()
4719 * regardless it wins or loses the race
4720 * against this function.
4721 */
4722 scsi_device_set_state(sdev, SDEV_OFFLINE);
4723 } else {
4724 WARN_ON(1);
4725 sdev = NULL;
4726 }
4727 }
4728
4729 spin_unlock_irqrestore(ap->lock, flags);
4730 mutex_unlock(&ap->scsi_host->scan_mutex);
4731
4732 if (sdev) {
4733 ata_dev_info(dev, "detaching (SCSI %s)\n",
4734 dev_name(&sdev->sdev_gendev));
4735
4736 scsi_remove_device(sdev);
4737 scsi_device_put(sdev);
4738 }
4739 }
4740
4741 static void ata_scsi_handle_link_detach(struct ata_link *link)
4742 {
4743 struct ata_port *ap = link->ap;
4744 struct ata_device *dev;
4745
4746 ata_for_each_dev(dev, link, ALL) {
4747 unsigned long flags;
4748
4749 if (!(dev->flags & ATA_DFLAG_DETACHED))
4750 continue;
4751
4752 spin_lock_irqsave(ap->lock, flags);
4753 dev->flags &= ~ATA_DFLAG_DETACHED;
4754 spin_unlock_irqrestore(ap->lock, flags);
4755
4756 if (zpodd_dev_enabled(dev))
4757 zpodd_exit(dev);
4758
4759 ata_scsi_remove_dev(dev);
4760 }
4761 }
4762
4763 /**
4764 * ata_scsi_media_change_notify - send media change event
4765 * @dev: Pointer to the disk device with media change event
4766 *
4767 * Tell the block layer to send a media change notification
4768 * event.
4769 *
4770 * LOCKING:
4771 * spin_lock_irqsave(host lock)
4772 */
4773 void ata_scsi_media_change_notify(struct ata_device *dev)
4774 {
4775 if (dev->sdev)
4776 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4777 GFP_ATOMIC);
4778 }
4779
4780 /**
4781 * ata_scsi_hotplug - SCSI part of hotplug
4782 * @work: Pointer to ATA port to perform SCSI hotplug on
4783 *
4784 * Perform SCSI part of hotplug. It's executed from a separate
4785 * workqueue after EH completes. This is necessary because SCSI
4786 * hot plugging requires working EH and hot unplugging is
4787 * synchronized with hot plugging with a mutex.
4788 *
4789 * LOCKING:
4790 * Kernel thread context (may sleep).
4791 */
4792 void ata_scsi_hotplug(struct work_struct *work)
4793 {
4794 struct ata_port *ap =
4795 container_of(work, struct ata_port, hotplug_task.work);
4796 int i;
4797
4798 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4799 DPRINTK("ENTER/EXIT - unloading\n");
4800 return;
4801 }
4802
4803 DPRINTK("ENTER\n");
4804 mutex_lock(&ap->scsi_scan_mutex);
4805
4806 /* Unplug detached devices. We cannot use link iterator here
4807 * because PMP links have to be scanned even if PMP is
4808 * currently not attached. Iterate manually.
4809 */
4810 ata_scsi_handle_link_detach(&ap->link);
4811 if (ap->pmp_link)
4812 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4813 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4814
4815 /* scan for new ones */
4816 ata_scsi_scan_host(ap, 0);
4817
4818 mutex_unlock(&ap->scsi_scan_mutex);
4819 DPRINTK("EXIT\n");
4820 }
4821
4822 /**
4823 * ata_scsi_user_scan - indication for user-initiated bus scan
4824 * @shost: SCSI host to scan
4825 * @channel: Channel to scan
4826 * @id: ID to scan
4827 * @lun: LUN to scan
4828 *
4829 * This function is called when user explicitly requests bus
4830 * scan. Set probe pending flag and invoke EH.
4831 *
4832 * LOCKING:
4833 * SCSI layer (we don't care)
4834 *
4835 * RETURNS:
4836 * Zero.
4837 */
4838 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4839 unsigned int id, u64 lun)
4840 {
4841 struct ata_port *ap = ata_shost_to_port(shost);
4842 unsigned long flags;
4843 int devno, rc = 0;
4844
4845 if (!ap->ops->error_handler)
4846 return -EOPNOTSUPP;
4847
4848 if (lun != SCAN_WILD_CARD && lun)
4849 return -EINVAL;
4850
4851 if (!sata_pmp_attached(ap)) {
4852 if (channel != SCAN_WILD_CARD && channel)
4853 return -EINVAL;
4854 devno = id;
4855 } else {
4856 if (id != SCAN_WILD_CARD && id)
4857 return -EINVAL;
4858 devno = channel;
4859 }
4860
4861 spin_lock_irqsave(ap->lock, flags);
4862
4863 if (devno == SCAN_WILD_CARD) {
4864 struct ata_link *link;
4865
4866 ata_for_each_link(link, ap, EDGE) {
4867 struct ata_eh_info *ehi = &link->eh_info;
4868 ehi->probe_mask |= ATA_ALL_DEVICES;
4869 ehi->action |= ATA_EH_RESET;
4870 }
4871 } else {
4872 struct ata_device *dev = ata_find_dev(ap, devno);
4873
4874 if (dev) {
4875 struct ata_eh_info *ehi = &dev->link->eh_info;
4876 ehi->probe_mask |= 1 << dev->devno;
4877 ehi->action |= ATA_EH_RESET;
4878 } else
4879 rc = -EINVAL;
4880 }
4881
4882 if (rc == 0) {
4883 ata_port_schedule_eh(ap);
4884 spin_unlock_irqrestore(ap->lock, flags);
4885 ata_port_wait_eh(ap);
4886 } else
4887 spin_unlock_irqrestore(ap->lock, flags);
4888
4889 return rc;
4890 }
4891
4892 /**
4893 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4894 * @work: Pointer to ATA port to perform scsi_rescan_device()
4895 *
4896 * After ATA pass thru (SAT) commands are executed successfully,
4897 * libata need to propagate the changes to SCSI layer.
4898 *
4899 * LOCKING:
4900 * Kernel thread context (may sleep).
4901 */
4902 void ata_scsi_dev_rescan(struct work_struct *work)
4903 {
4904 struct ata_port *ap =
4905 container_of(work, struct ata_port, scsi_rescan_task);
4906 struct ata_link *link;
4907 struct ata_device *dev;
4908 unsigned long flags;
4909
4910 mutex_lock(&ap->scsi_scan_mutex);
4911 spin_lock_irqsave(ap->lock, flags);
4912
4913 ata_for_each_link(link, ap, EDGE) {
4914 ata_for_each_dev(dev, link, ENABLED) {
4915 struct scsi_device *sdev = dev->sdev;
4916
4917 if (!sdev)
4918 continue;
4919 if (scsi_device_get(sdev))
4920 continue;
4921
4922 spin_unlock_irqrestore(ap->lock, flags);
4923 scsi_rescan_device(&(sdev->sdev_gendev));
4924 scsi_device_put(sdev);
4925 spin_lock_irqsave(ap->lock, flags);
4926 }
4927 }
4928
4929 spin_unlock_irqrestore(ap->lock, flags);
4930 mutex_unlock(&ap->scsi_scan_mutex);
4931 }
4932
4933 /**
4934 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4935 * @host: ATA host container for all SAS ports
4936 * @port_info: Information from low-level host driver
4937 * @shost: SCSI host that the scsi device is attached to
4938 *
4939 * LOCKING:
4940 * PCI/etc. bus probe sem.
4941 *
4942 * RETURNS:
4943 * ata_port pointer on success / NULL on failure.
4944 */
4945
4946 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4947 struct ata_port_info *port_info,
4948 struct Scsi_Host *shost)
4949 {
4950 struct ata_port *ap;
4951
4952 ap = ata_port_alloc(host);
4953 if (!ap)
4954 return NULL;
4955
4956 ap->port_no = 0;
4957 ap->lock = &host->lock;
4958 ap->pio_mask = port_info->pio_mask;
4959 ap->mwdma_mask = port_info->mwdma_mask;
4960 ap->udma_mask = port_info->udma_mask;
4961 ap->flags |= port_info->flags;
4962 ap->ops = port_info->port_ops;
4963 ap->cbl = ATA_CBL_SATA;
4964
4965 return ap;
4966 }
4967 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4968
4969 /**
4970 * ata_sas_port_start - Set port up for dma.
4971 * @ap: Port to initialize
4972 *
4973 * Called just after data structures for each port are
4974 * initialized.
4975 *
4976 * May be used as the port_start() entry in ata_port_operations.
4977 *
4978 * LOCKING:
4979 * Inherited from caller.
4980 */
4981 int ata_sas_port_start(struct ata_port *ap)
4982 {
4983 /*
4984 * the port is marked as frozen at allocation time, but if we don't
4985 * have new eh, we won't thaw it
4986 */
4987 if (!ap->ops->error_handler)
4988 ap->pflags &= ~ATA_PFLAG_FROZEN;
4989 return 0;
4990 }
4991 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4992
4993 /**
4994 * ata_port_stop - Undo ata_sas_port_start()
4995 * @ap: Port to shut down
4996 *
4997 * May be used as the port_stop() entry in ata_port_operations.
4998 *
4999 * LOCKING:
5000 * Inherited from caller.
5001 */
5002
5003 void ata_sas_port_stop(struct ata_port *ap)
5004 {
5005 }
5006 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
5007
5008 /**
5009 * ata_sas_async_probe - simply schedule probing and return
5010 * @ap: Port to probe
5011 *
5012 * For batch scheduling of probe for sas attached ata devices, assumes
5013 * the port has already been through ata_sas_port_init()
5014 */
5015 void ata_sas_async_probe(struct ata_port *ap)
5016 {
5017 __ata_port_probe(ap);
5018 }
5019 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
5020
5021 int ata_sas_sync_probe(struct ata_port *ap)
5022 {
5023 return ata_port_probe(ap);
5024 }
5025 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
5026
5027
5028 /**
5029 * ata_sas_port_init - Initialize a SATA device
5030 * @ap: SATA port to initialize
5031 *
5032 * LOCKING:
5033 * PCI/etc. bus probe sem.
5034 *
5035 * RETURNS:
5036 * Zero on success, non-zero on error.
5037 */
5038
5039 int ata_sas_port_init(struct ata_port *ap)
5040 {
5041 int rc = ap->ops->port_start(ap);
5042
5043 if (rc)
5044 return rc;
5045 ap->print_id = atomic_inc_return(&ata_print_id);
5046 return 0;
5047 }
5048 EXPORT_SYMBOL_GPL(ata_sas_port_init);
5049
5050 int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
5051 {
5052 return ata_tport_add(parent, ap);
5053 }
5054 EXPORT_SYMBOL_GPL(ata_sas_tport_add);
5055
5056 void ata_sas_tport_delete(struct ata_port *ap)
5057 {
5058 ata_tport_delete(ap);
5059 }
5060 EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
5061
5062 /**
5063 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5064 * @ap: SATA port to destroy
5065 *
5066 */
5067
5068 void ata_sas_port_destroy(struct ata_port *ap)
5069 {
5070 if (ap->ops->port_stop)
5071 ap->ops->port_stop(ap);
5072 kfree(ap);
5073 }
5074 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5075
5076 /**
5077 * ata_sas_slave_configure - Default slave_config routine for libata devices
5078 * @sdev: SCSI device to configure
5079 * @ap: ATA port to which SCSI device is attached
5080 *
5081 * RETURNS:
5082 * Zero.
5083 */
5084
5085 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5086 {
5087 ata_scsi_sdev_config(sdev);
5088 ata_scsi_dev_config(sdev, ap->link.device);
5089 return 0;
5090 }
5091 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5092
5093 /**
5094 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5095 * @cmd: SCSI command to be sent
5096 * @ap: ATA port to which the command is being sent
5097 *
5098 * RETURNS:
5099 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5100 * 0 otherwise.
5101 */
5102
5103 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5104 {
5105 int rc = 0;
5106
5107 ata_scsi_dump_cdb(ap, cmd);
5108
5109 if (likely(ata_dev_enabled(ap->link.device)))
5110 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5111 else {
5112 cmd->result = (DID_BAD_TARGET << 16);
5113 cmd->scsi_done(cmd);
5114 }
5115 return rc;
5116 }
5117 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5118
5119 int ata_sas_allocate_tag(struct ata_port *ap)
5120 {
5121 unsigned int max_queue = ap->host->n_tags;
5122 unsigned int i, tag;
5123
5124 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5125 tag = tag < max_queue ? tag : 0;
5126
5127 /* the last tag is reserved for internal command. */
5128 if (ata_tag_internal(tag))
5129 continue;
5130
5131 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5132 ap->sas_last_tag = tag;
5133 return tag;
5134 }
5135 }
5136 return -1;
5137 }
5138
5139 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5140 {
5141 clear_bit(tag, &ap->sas_tag_allocated);
5142 }
Linux with added FPC-III support