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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/slab.h>
21#include <linux/kernel.h>
22#include <linux/blkdev.h>
23#include <linux/spinlock.h>
24#include <linux/export.h>
25#include <scsi/scsi.h>
26#include <scsi/scsi_host.h>
27#include <scsi/scsi_cmnd.h>
28#include <scsi/scsi_eh.h>
29#include <scsi/scsi_device.h>
30#include <scsi/scsi_tcq.h>
31#include <scsi/scsi_transport.h>
32#include <linux/libata.h>
33#include <linux/hdreg.h>
34#include <linux/uaccess.h>
35#include <linux/suspend.h>
36#include <asm/unaligned.h>
37#include <linux/ioprio.h>
38
39#include "libata.h"
40#include "libata-transport.h"
41
42#define ATA_SCSI_RBUF_SIZE 4096
43
44static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
45static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
46
47typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
48
49static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
50 const struct scsi_device *scsidev);
51static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
52 const struct scsi_device *scsidev);
53
54#define RW_RECOVERY_MPAGE 0x1
55#define RW_RECOVERY_MPAGE_LEN 12
56#define CACHE_MPAGE 0x8
57#define CACHE_MPAGE_LEN 20
58#define CONTROL_MPAGE 0xa
59#define CONTROL_MPAGE_LEN 12
60#define ALL_MPAGES 0x3f
61#define ALL_SUB_MPAGES 0xff
62
63
64static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
65 RW_RECOVERY_MPAGE,
66 RW_RECOVERY_MPAGE_LEN - 2,
67 (1 << 7), /* AWRE */
68 0, /* read retry count */
69 0, 0, 0, 0,
70 0, /* write retry count */
71 0, 0, 0
72};
73
74static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
75 CACHE_MPAGE,
76 CACHE_MPAGE_LEN - 2,
77 0, /* contains WCE, needs to be 0 for logic */
78 0, 0, 0, 0, 0, 0, 0, 0, 0,
79 0, /* contains DRA, needs to be 0 for logic */
80 0, 0, 0, 0, 0, 0, 0
81};
82
83static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
84 CONTROL_MPAGE,
85 CONTROL_MPAGE_LEN - 2,
86 2, /* DSENSE=0, GLTSD=1 */
87 0, /* [QAM+QERR may be 1, see 05-359r1] */
88 0, 0, 0, 0, 0xff, 0xff,
89 0, 30 /* extended self test time, see 05-359r1 */
90};
91
92static const char *ata_lpm_policy_names[] = {
93 [ATA_LPM_UNKNOWN] = "max_performance",
94 [ATA_LPM_MAX_POWER] = "max_performance",
95 [ATA_LPM_MED_POWER] = "medium_power",
96 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
97 [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
98 [ATA_LPM_MIN_POWER] = "min_power",
99};
100
101static ssize_t ata_scsi_lpm_store(struct device *device,
102 struct device_attribute *attr,
103 const char *buf, size_t count)
104{
105 struct Scsi_Host *shost = class_to_shost(device);
106 struct ata_port *ap = ata_shost_to_port(shost);
107 struct ata_link *link;
108 struct ata_device *dev;
109 enum ata_lpm_policy policy;
110 unsigned long flags;
111
112 /* UNKNOWN is internal state, iterate from MAX_POWER */
113 for (policy = ATA_LPM_MAX_POWER;
114 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
115 const char *name = ata_lpm_policy_names[policy];
116
117 if (strncmp(name, buf, strlen(name)) == 0)
118 break;
119 }
120 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
121 return -EINVAL;
122
123 spin_lock_irqsave(ap->lock, flags);
124
125 ata_for_each_link(link, ap, EDGE) {
126 ata_for_each_dev(dev, &ap->link, ENABLED) {
127 if (dev->horkage & ATA_HORKAGE_NOLPM) {
128 count = -EOPNOTSUPP;
129 goto out_unlock;
130 }
131 }
132 }
133
134 ap->target_lpm_policy = policy;
135 ata_port_schedule_eh(ap);
136out_unlock:
137 spin_unlock_irqrestore(ap->lock, flags);
138 return count;
139}
140
141static ssize_t ata_scsi_lpm_show(struct device *dev,
142 struct device_attribute *attr, char *buf)
143{
144 struct Scsi_Host *shost = class_to_shost(dev);
145 struct ata_port *ap = ata_shost_to_port(shost);
146
147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
148 return -EINVAL;
149
150 return snprintf(buf, PAGE_SIZE, "%s\n",
151 ata_lpm_policy_names[ap->target_lpm_policy]);
152}
153DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
154 ata_scsi_lpm_show, ata_scsi_lpm_store);
155EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
156
157static ssize_t ata_scsi_park_show(struct device *device,
158 struct device_attribute *attr, char *buf)
159{
160 struct scsi_device *sdev = to_scsi_device(device);
161 struct ata_port *ap;
162 struct ata_link *link;
163 struct ata_device *dev;
164 unsigned long now;
165 unsigned int uninitialized_var(msecs);
166 int rc = 0;
167
168 ap = ata_shost_to_port(sdev->host);
169
170 spin_lock_irq(ap->lock);
171 dev = ata_scsi_find_dev(ap, sdev);
172 if (!dev) {
173 rc = -ENODEV;
174 goto unlock;
175 }
176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
177 rc = -EOPNOTSUPP;
178 goto unlock;
179 }
180
181 link = dev->link;
182 now = jiffies;
183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
184 link->eh_context.unloaded_mask & (1 << dev->devno) &&
185 time_after(dev->unpark_deadline, now))
186 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
187 else
188 msecs = 0;
189
190unlock:
191 spin_unlock_irq(ap->lock);
192
193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
194}
195
196static ssize_t ata_scsi_park_store(struct device *device,
197 struct device_attribute *attr,
198 const char *buf, size_t len)
199{
200 struct scsi_device *sdev = to_scsi_device(device);
201 struct ata_port *ap;
202 struct ata_device *dev;
203 long int input;
204 unsigned long flags;
205 int rc;
206
207 rc = kstrtol(buf, 10, &input);
208 if (rc)
209 return rc;
210 if (input < -2)
211 return -EINVAL;
212 if (input > ATA_TMOUT_MAX_PARK) {
213 rc = -EOVERFLOW;
214 input = ATA_TMOUT_MAX_PARK;
215 }
216
217 ap = ata_shost_to_port(sdev->host);
218
219 spin_lock_irqsave(ap->lock, flags);
220 dev = ata_scsi_find_dev(ap, sdev);
221 if (unlikely(!dev)) {
222 rc = -ENODEV;
223 goto unlock;
224 }
225 if (dev->class != ATA_DEV_ATA &&
226 dev->class != ATA_DEV_ZAC) {
227 rc = -EOPNOTSUPP;
228 goto unlock;
229 }
230
231 if (input >= 0) {
232 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
233 rc = -EOPNOTSUPP;
234 goto unlock;
235 }
236
237 dev->unpark_deadline = ata_deadline(jiffies, input);
238 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
239 ata_port_schedule_eh(ap);
240 complete(&ap->park_req_pending);
241 } else {
242 switch (input) {
243 case -1:
244 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
245 break;
246 case -2:
247 dev->flags |= ATA_DFLAG_NO_UNLOAD;
248 break;
249 }
250 }
251unlock:
252 spin_unlock_irqrestore(ap->lock, flags);
253
254 return rc ? rc : len;
255}
256DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
257 ata_scsi_park_show, ata_scsi_park_store);
258EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
259
260static ssize_t ata_ncq_prio_enable_show(struct device *device,
261 struct device_attribute *attr,
262 char *buf)
263{
264 struct scsi_device *sdev = to_scsi_device(device);
265 struct ata_port *ap;
266 struct ata_device *dev;
267 bool ncq_prio_enable;
268 int rc = 0;
269
270 ap = ata_shost_to_port(sdev->host);
271
272 spin_lock_irq(ap->lock);
273 dev = ata_scsi_find_dev(ap, sdev);
274 if (!dev) {
275 rc = -ENODEV;
276 goto unlock;
277 }
278
279 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
280
281unlock:
282 spin_unlock_irq(ap->lock);
283
284 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
285}
286
287static ssize_t ata_ncq_prio_enable_store(struct device *device,
288 struct device_attribute *attr,
289 const char *buf, size_t len)
290{
291 struct scsi_device *sdev = to_scsi_device(device);
292 struct ata_port *ap;
293 struct ata_device *dev;
294 long int input;
295 int rc;
296
297 rc = kstrtol(buf, 10, &input);
298 if (rc)
299 return rc;
300 if ((input < 0) || (input > 1))
301 return -EINVAL;
302
303 ap = ata_shost_to_port(sdev->host);
304 dev = ata_scsi_find_dev(ap, sdev);
305 if (unlikely(!dev))
306 return -ENODEV;
307
308 spin_lock_irq(ap->lock);
309 if (input)
310 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
311 else
312 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
313
314 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
315 dev->link->eh_info.flags |= ATA_EHI_QUIET;
316 ata_port_schedule_eh(ap);
317 spin_unlock_irq(ap->lock);
318
319 ata_port_wait_eh(ap);
320
321 if (input) {
322 spin_lock_irq(ap->lock);
323 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
324 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
325 rc = -EIO;
326 }
327 spin_unlock_irq(ap->lock);
328 }
329
330 return rc ? rc : len;
331}
332
333DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
334 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
335EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
336
337void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
338 u8 sk, u8 asc, u8 ascq)
339{
340 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
341
342 if (!cmd)
343 return;
344
345 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
346
347 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
348}
349
350void ata_scsi_set_sense_information(struct ata_device *dev,
351 struct scsi_cmnd *cmd,
352 const struct ata_taskfile *tf)
353{
354 u64 information;
355
356 if (!cmd)
357 return;
358
359 information = ata_tf_read_block(tf, dev);
360 if (information == U64_MAX)
361 return;
362
363 scsi_set_sense_information(cmd->sense_buffer,
364 SCSI_SENSE_BUFFERSIZE, information);
365}
366
367static void ata_scsi_set_invalid_field(struct ata_device *dev,
368 struct scsi_cmnd *cmd, u16 field, u8 bit)
369{
370 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
371 /* "Invalid field in CDB" */
372 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
373 field, bit, 1);
374}
375
376static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
377 struct scsi_cmnd *cmd, u16 field)
378{
379 /* "Invalid field in parameter list" */
380 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
381 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
382 field, 0xff, 0);
383}
384
385static ssize_t
386ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
387 const char *buf, size_t count)
388{
389 struct Scsi_Host *shost = class_to_shost(dev);
390 struct ata_port *ap = ata_shost_to_port(shost);
391 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
392 return ap->ops->em_store(ap, buf, count);
393 return -EINVAL;
394}
395
396static ssize_t
397ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
398 char *buf)
399{
400 struct Scsi_Host *shost = class_to_shost(dev);
401 struct ata_port *ap = ata_shost_to_port(shost);
402
403 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
404 return ap->ops->em_show(ap, buf);
405 return -EINVAL;
406}
407DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
408 ata_scsi_em_message_show, ata_scsi_em_message_store);
409EXPORT_SYMBOL_GPL(dev_attr_em_message);
410
411static ssize_t
412ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
413 char *buf)
414{
415 struct Scsi_Host *shost = class_to_shost(dev);
416 struct ata_port *ap = ata_shost_to_port(shost);
417
418 return snprintf(buf, 23, "%d\n", ap->em_message_type);
419}
420DEVICE_ATTR(em_message_type, S_IRUGO,
421 ata_scsi_em_message_type_show, NULL);
422EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
423
424static ssize_t
425ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
426 char *buf)
427{
428 struct scsi_device *sdev = to_scsi_device(dev);
429 struct ata_port *ap = ata_shost_to_port(sdev->host);
430 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
431
432 if (atadev && ap->ops->sw_activity_show &&
433 (ap->flags & ATA_FLAG_SW_ACTIVITY))
434 return ap->ops->sw_activity_show(atadev, buf);
435 return -EINVAL;
436}
437
438static ssize_t
439ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
440 const char *buf, size_t count)
441{
442 struct scsi_device *sdev = to_scsi_device(dev);
443 struct ata_port *ap = ata_shost_to_port(sdev->host);
444 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
445 enum sw_activity val;
446 int rc;
447
448 if (atadev && ap->ops->sw_activity_store &&
449 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
450 val = simple_strtoul(buf, NULL, 0);
451 switch (val) {
452 case OFF: case BLINK_ON: case BLINK_OFF:
453 rc = ap->ops->sw_activity_store(atadev, val);
454 if (!rc)
455 return count;
456 else
457 return rc;
458 }
459 }
460 return -EINVAL;
461}
462DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
463 ata_scsi_activity_store);
464EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
465
466struct device_attribute *ata_common_sdev_attrs[] = {
467 &dev_attr_unload_heads,
468 &dev_attr_ncq_prio_enable,
469 NULL
470};
471EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
472
473/**
474 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
475 * @sdev: SCSI device for which BIOS geometry is to be determined
476 * @bdev: block device associated with @sdev
477 * @capacity: capacity of SCSI device
478 * @geom: location to which geometry will be output
479 *
480 * Generic bios head/sector/cylinder calculator
481 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
482 * mapping. Some situations may arise where the disk is not
483 * bootable if this is not used.
484 *
485 * LOCKING:
486 * Defined by the SCSI layer. We don't really care.
487 *
488 * RETURNS:
489 * Zero.
490 */
491int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
492 sector_t capacity, int geom[])
493{
494 geom[0] = 255;
495 geom[1] = 63;
496 sector_div(capacity, 255*63);
497 geom[2] = capacity;
498
499 return 0;
500}
501
502/**
503 * ata_scsi_unlock_native_capacity - unlock native capacity
504 * @sdev: SCSI device to adjust device capacity for
505 *
506 * This function is called if a partition on @sdev extends beyond
507 * the end of the device. It requests EH to unlock HPA.
508 *
509 * LOCKING:
510 * Defined by the SCSI layer. Might sleep.
511 */
512void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
513{
514 struct ata_port *ap = ata_shost_to_port(sdev->host);
515 struct ata_device *dev;
516 unsigned long flags;
517
518 spin_lock_irqsave(ap->lock, flags);
519
520 dev = ata_scsi_find_dev(ap, sdev);
521 if (dev && dev->n_sectors < dev->n_native_sectors) {
522 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
523 dev->link->eh_info.action |= ATA_EH_RESET;
524 ata_port_schedule_eh(ap);
525 }
526
527 spin_unlock_irqrestore(ap->lock, flags);
528 ata_port_wait_eh(ap);
529}
530
531/**
532 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
533 * @ap: target port
534 * @sdev: SCSI device to get identify data for
535 * @arg: User buffer area for identify data
536 *
537 * LOCKING:
538 * Defined by the SCSI layer. We don't really care.
539 *
540 * RETURNS:
541 * Zero on success, negative errno on error.
542 */
543static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
544 void __user *arg)
545{
546 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
547 u16 __user *dst = arg;
548 char buf[40];
549
550 if (!dev)
551 return -ENOMSG;
552
553 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
554 return -EFAULT;
555
556 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
557 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
558 return -EFAULT;
559
560 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
561 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
562 return -EFAULT;
563
564 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
565 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
566 return -EFAULT;
567
568 return 0;
569}
570
571/**
572 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
573 * @scsidev: Device to which we are issuing command
574 * @arg: User provided data for issuing command
575 *
576 * LOCKING:
577 * Defined by the SCSI layer. We don't really care.
578 *
579 * RETURNS:
580 * Zero on success, negative errno on error.
581 */
582int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
583{
584 int rc = 0;
585 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
586 u8 scsi_cmd[MAX_COMMAND_SIZE];
587 u8 args[4], *argbuf = NULL;
588 int argsize = 0;
589 enum dma_data_direction data_dir;
590 struct scsi_sense_hdr sshdr;
591 int cmd_result;
592
593 if (arg == NULL)
594 return -EINVAL;
595
596 if (copy_from_user(args, arg, sizeof(args)))
597 return -EFAULT;
598
599 memset(sensebuf, 0, sizeof(sensebuf));
600 memset(scsi_cmd, 0, sizeof(scsi_cmd));
601
602 if (args[3]) {
603 argsize = ATA_SECT_SIZE * args[3];
604 argbuf = kmalloc(argsize, GFP_KERNEL);
605 if (argbuf == NULL) {
606 rc = -ENOMEM;
607 goto error;
608 }
609
610 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
611 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
612 block count in sector count field */
613 data_dir = DMA_FROM_DEVICE;
614 } else {
615 scsi_cmd[1] = (3 << 1); /* Non-data */
616 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
617 data_dir = DMA_NONE;
618 }
619
620 scsi_cmd[0] = ATA_16;
621
622 scsi_cmd[4] = args[2];
623 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
624 scsi_cmd[6] = args[3];
625 scsi_cmd[8] = args[1];
626 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
627 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
628 } else {
629 scsi_cmd[6] = args[1];
630 }
631 scsi_cmd[14] = args[0];
632
633 /* Good values for timeout and retries? Values below
634 from scsi_ioctl_send_command() for default case... */
635 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
636 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
637
638 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
639 u8 *desc = sensebuf + 8;
640 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
641
642 /* If we set cc then ATA pass-through will cause a
643 * check condition even if no error. Filter that. */
644 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
645 if (sshdr.sense_key == RECOVERED_ERROR &&
646 sshdr.asc == 0 && sshdr.ascq == 0x1d)
647 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
648 }
649
650 /* Send userspace a few ATA registers (same as drivers/ide) */
651 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
652 desc[0] == 0x09) { /* code is "ATA Descriptor" */
653 args[0] = desc[13]; /* status */
654 args[1] = desc[3]; /* error */
655 args[2] = desc[5]; /* sector count (0:7) */
656 if (copy_to_user(arg, args, sizeof(args)))
657 rc = -EFAULT;
658 }
659 }
660
661
662 if (cmd_result) {
663 rc = -EIO;
664 goto error;
665 }
666
667 if ((argbuf)
668 && copy_to_user(arg + sizeof(args), argbuf, argsize))
669 rc = -EFAULT;
670error:
671 kfree(argbuf);
672 return rc;
673}
674
675/**
676 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
677 * @scsidev: Device to which we are issuing command
678 * @arg: User provided data for issuing command
679 *
680 * LOCKING:
681 * Defined by the SCSI layer. We don't really care.
682 *
683 * RETURNS:
684 * Zero on success, negative errno on error.
685 */
686int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
687{
688 int rc = 0;
689 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
690 u8 scsi_cmd[MAX_COMMAND_SIZE];
691 u8 args[7];
692 struct scsi_sense_hdr sshdr;
693 int cmd_result;
694
695 if (arg == NULL)
696 return -EINVAL;
697
698 if (copy_from_user(args, arg, sizeof(args)))
699 return -EFAULT;
700
701 memset(sensebuf, 0, sizeof(sensebuf));
702 memset(scsi_cmd, 0, sizeof(scsi_cmd));
703 scsi_cmd[0] = ATA_16;
704 scsi_cmd[1] = (3 << 1); /* Non-data */
705 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
706 scsi_cmd[4] = args[1];
707 scsi_cmd[6] = args[2];
708 scsi_cmd[8] = args[3];
709 scsi_cmd[10] = args[4];
710 scsi_cmd[12] = args[5];
711 scsi_cmd[13] = args[6] & 0x4f;
712 scsi_cmd[14] = args[0];
713
714 /* Good values for timeout and retries? Values below
715 from scsi_ioctl_send_command() for default case... */
716 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
717 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
718
719 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
720 u8 *desc = sensebuf + 8;
721 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
722
723 /* If we set cc then ATA pass-through will cause a
724 * check condition even if no error. Filter that. */
725 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
726 if (sshdr.sense_key == RECOVERED_ERROR &&
727 sshdr.asc == 0 && sshdr.ascq == 0x1d)
728 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
729 }
730
731 /* Send userspace ATA registers */
732 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
733 desc[0] == 0x09) {/* code is "ATA Descriptor" */
734 args[0] = desc[13]; /* status */
735 args[1] = desc[3]; /* error */
736 args[2] = desc[5]; /* sector count (0:7) */
737 args[3] = desc[7]; /* lbal */
738 args[4] = desc[9]; /* lbam */
739 args[5] = desc[11]; /* lbah */
740 args[6] = desc[12]; /* select */
741 if (copy_to_user(arg, args, sizeof(args)))
742 rc = -EFAULT;
743 }
744 }
745
746 if (cmd_result) {
747 rc = -EIO;
748 goto error;
749 }
750
751 error:
752 return rc;
753}
754
755static int ata_ioc32(struct ata_port *ap)
756{
757 if (ap->flags & ATA_FLAG_PIO_DMA)
758 return 1;
759 if (ap->pflags & ATA_PFLAG_PIO32)
760 return 1;
761 return 0;
762}
763
764int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
765 unsigned int cmd, void __user *arg)
766{
767 unsigned long val;
768 int rc = -EINVAL;
769 unsigned long flags;
770
771 switch (cmd) {
772 case HDIO_GET_32BIT:
773 spin_lock_irqsave(ap->lock, flags);
774 val = ata_ioc32(ap);
775 spin_unlock_irqrestore(ap->lock, flags);
776 return put_user(val, (unsigned long __user *)arg);
777
778 case HDIO_SET_32BIT:
779 val = (unsigned long) arg;
780 rc = 0;
781 spin_lock_irqsave(ap->lock, flags);
782 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
783 if (val)
784 ap->pflags |= ATA_PFLAG_PIO32;
785 else
786 ap->pflags &= ~ATA_PFLAG_PIO32;
787 } else {
788 if (val != ata_ioc32(ap))
789 rc = -EINVAL;
790 }
791 spin_unlock_irqrestore(ap->lock, flags);
792 return rc;
793
794 case HDIO_GET_IDENTITY:
795 return ata_get_identity(ap, scsidev, arg);
796
797 case HDIO_DRIVE_CMD:
798 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
799 return -EACCES;
800 return ata_cmd_ioctl(scsidev, arg);
801
802 case HDIO_DRIVE_TASK:
803 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
804 return -EACCES;
805 return ata_task_ioctl(scsidev, arg);
806
807 default:
808 rc = -ENOTTY;
809 break;
810 }
811
812 return rc;
813}
814EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
815
816int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
817 void __user *arg)
818{
819 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
820 scsidev, cmd, arg);
821}
822EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
823
824/**
825 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
826 * @dev: ATA device to which the new command is attached
827 * @cmd: SCSI command that originated this ATA command
828 *
829 * Obtain a reference to an unused ata_queued_cmd structure,
830 * which is the basic libata structure representing a single
831 * ATA command sent to the hardware.
832 *
833 * If a command was available, fill in the SCSI-specific
834 * portions of the structure with information on the
835 * current command.
836 *
837 * LOCKING:
838 * spin_lock_irqsave(host lock)
839 *
840 * RETURNS:
841 * Command allocated, or %NULL if none available.
842 */
843static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
844 struct scsi_cmnd *cmd)
845{
846 struct ata_queued_cmd *qc;
847
848 qc = ata_qc_new_init(dev, cmd->request->tag);
849 if (qc) {
850 qc->scsicmd = cmd;
851 qc->scsidone = cmd->scsi_done;
852
853 qc->sg = scsi_sglist(cmd);
854 qc->n_elem = scsi_sg_count(cmd);
855
856 if (cmd->request->rq_flags & RQF_QUIET)
857 qc->flags |= ATA_QCFLAG_QUIET;
858 } else {
859 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
860 cmd->scsi_done(cmd);
861 }
862
863 return qc;
864}
865
866static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
867{
868 struct scsi_cmnd *scmd = qc->scsicmd;
869
870 qc->extrabytes = scmd->request->extra_len;
871 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
872}
873
874/**
875 * ata_dump_status - user friendly display of error info
876 * @id: id of the port in question
877 * @tf: ptr to filled out taskfile
878 *
879 * Decode and dump the ATA error/status registers for the user so
880 * that they have some idea what really happened at the non
881 * make-believe layer.
882 *
883 * LOCKING:
884 * inherited from caller
885 */
886static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
887{
888 u8 stat = tf->command, err = tf->feature;
889
890 pr_warn("ata%u: status=0x%02x { ", id, stat);
891 if (stat & ATA_BUSY) {
892 pr_cont("Busy }\n"); /* Data is not valid in this case */
893 } else {
894 if (stat & ATA_DRDY) pr_cont("DriveReady ");
895 if (stat & ATA_DF) pr_cont("DeviceFault ");
896 if (stat & ATA_DSC) pr_cont("SeekComplete ");
897 if (stat & ATA_DRQ) pr_cont("DataRequest ");
898 if (stat & ATA_CORR) pr_cont("CorrectedError ");
899 if (stat & ATA_SENSE) pr_cont("Sense ");
900 if (stat & ATA_ERR) pr_cont("Error ");
901 pr_cont("}\n");
902
903 if (err) {
904 pr_warn("ata%u: error=0x%02x { ", id, err);
905 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
906 if (err & ATA_ICRC) {
907 if (err & ATA_ABORTED)
908 pr_cont("BadCRC ");
909 else pr_cont("Sector ");
910 }
911 if (err & ATA_UNC) pr_cont("UncorrectableError ");
912 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
913 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
914 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
915 pr_cont("}\n");
916 }
917 }
918}
919
920/**
921 * ata_to_sense_error - convert ATA error to SCSI error
922 * @id: ATA device number
923 * @drv_stat: value contained in ATA status register
924 * @drv_err: value contained in ATA error register
925 * @sk: the sense key we'll fill out
926 * @asc: the additional sense code we'll fill out
927 * @ascq: the additional sense code qualifier we'll fill out
928 * @verbose: be verbose
929 *
930 * Converts an ATA error into a SCSI error. Fill out pointers to
931 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
932 * format sense blocks.
933 *
934 * LOCKING:
935 * spin_lock_irqsave(host lock)
936 */
937static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
938 u8 *asc, u8 *ascq, int verbose)
939{
940 int i;
941
942 /* Based on the 3ware driver translation table */
943 static const unsigned char sense_table[][4] = {
944 /* BBD|ECC|ID|MAR */
945 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
946 // Device busy Aborted command
947 /* BBD|ECC|ID */
948 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
949 // Device busy Aborted command
950 /* ECC|MC|MARK */
951 {0x61, HARDWARE_ERROR, 0x00, 0x00},
952 // Device fault Hardware error
953 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
954 {0x84, ABORTED_COMMAND, 0x47, 0x00},
955 // Data CRC error SCSI parity error
956 /* MC|ID|ABRT|TRK0|MARK */
957 {0x37, NOT_READY, 0x04, 0x00},
958 // Unit offline Not ready
959 /* MCR|MARK */
960 {0x09, NOT_READY, 0x04, 0x00},
961 // Unrecovered disk error Not ready
962 /* Bad address mark */
963 {0x01, MEDIUM_ERROR, 0x13, 0x00},
964 // Address mark not found for data field
965 /* TRK0 - Track 0 not found */
966 {0x02, HARDWARE_ERROR, 0x00, 0x00},
967 // Hardware error
968 /* Abort: 0x04 is not translated here, see below */
969 /* Media change request */
970 {0x08, NOT_READY, 0x04, 0x00},
971 // FIXME: faking offline
972 /* SRV/IDNF - ID not found */
973 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
974 // Logical address out of range
975 /* MC - Media Changed */
976 {0x20, UNIT_ATTENTION, 0x28, 0x00},
977 // Not ready to ready change, medium may have changed
978 /* ECC - Uncorrectable ECC error */
979 {0x40, MEDIUM_ERROR, 0x11, 0x04},
980 // Unrecovered read error
981 /* BBD - block marked bad */
982 {0x80, MEDIUM_ERROR, 0x11, 0x04},
983 // Block marked bad Medium error, unrecovered read error
984 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
985 };
986 static const unsigned char stat_table[][4] = {
987 /* Must be first because BUSY means no other bits valid */
988 {0x80, ABORTED_COMMAND, 0x47, 0x00},
989 // Busy, fake parity for now
990 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
991 // Device ready, unaligned write command
992 {0x20, HARDWARE_ERROR, 0x44, 0x00},
993 // Device fault, internal target failure
994 {0x08, ABORTED_COMMAND, 0x47, 0x00},
995 // Timed out in xfer, fake parity for now
996 {0x04, RECOVERED_ERROR, 0x11, 0x00},
997 // Recovered ECC error Medium error, recovered
998 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
999 };
1000
1001 /*
1002 * Is this an error we can process/parse
1003 */
1004 if (drv_stat & ATA_BUSY) {
1005 drv_err = 0; /* Ignore the err bits, they're invalid */
1006 }
1007
1008 if (drv_err) {
1009 /* Look for drv_err */
1010 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1011 /* Look for best matches first */
1012 if ((sense_table[i][0] & drv_err) ==
1013 sense_table[i][0]) {
1014 *sk = sense_table[i][1];
1015 *asc = sense_table[i][2];
1016 *ascq = sense_table[i][3];
1017 goto translate_done;
1018 }
1019 }
1020 }
1021
1022 /*
1023 * Fall back to interpreting status bits. Note that if the drv_err
1024 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1025 * is not descriptive enough.
1026 */
1027 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1028 if (stat_table[i][0] & drv_stat) {
1029 *sk = stat_table[i][1];
1030 *asc = stat_table[i][2];
1031 *ascq = stat_table[i][3];
1032 goto translate_done;
1033 }
1034 }
1035
1036 /*
1037 * We need a sensible error return here, which is tricky, and one
1038 * that won't cause people to do things like return a disk wrongly.
1039 */
1040 *sk = ABORTED_COMMAND;
1041 *asc = 0x00;
1042 *ascq = 0x00;
1043
1044 translate_done:
1045 if (verbose)
1046 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1047 id, drv_stat, drv_err, *sk, *asc, *ascq);
1048 return;
1049}
1050
1051/*
1052 * ata_gen_passthru_sense - Generate check condition sense block.
1053 * @qc: Command that completed.
1054 *
1055 * This function is specific to the ATA descriptor format sense
1056 * block specified for the ATA pass through commands. Regardless
1057 * of whether the command errored or not, return a sense
1058 * block. Copy all controller registers into the sense
1059 * block. If there was no error, we get the request from an ATA
1060 * passthrough command, so we use the following sense data:
1061 * sk = RECOVERED ERROR
1062 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1063 *
1064 *
1065 * LOCKING:
1066 * None.
1067 */
1068static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1069{
1070 struct scsi_cmnd *cmd = qc->scsicmd;
1071 struct ata_taskfile *tf = &qc->result_tf;
1072 unsigned char *sb = cmd->sense_buffer;
1073 unsigned char *desc = sb + 8;
1074 int verbose = qc->ap->ops->error_handler == NULL;
1075 u8 sense_key, asc, ascq;
1076
1077 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1078
1079 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1080
1081 /*
1082 * Use ata_to_sense_error() to map status register bits
1083 * onto sense key, asc & ascq.
1084 */
1085 if (qc->err_mask ||
1086 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1087 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1088 &sense_key, &asc, &ascq, verbose);
1089 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1090 } else {
1091 /*
1092 * ATA PASS-THROUGH INFORMATION AVAILABLE
1093 * Always in descriptor format sense.
1094 */
1095 scsi_build_sense_buffer(1, cmd->sense_buffer,
1096 RECOVERED_ERROR, 0, 0x1D);
1097 }
1098
1099 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1100 u8 len;
1101
1102 /* descriptor format */
1103 len = sb[7];
1104 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1105 if (!desc) {
1106 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1107 return;
1108 sb[7] = len + 14;
1109 desc = sb + 8 + len;
1110 }
1111 desc[0] = 9;
1112 desc[1] = 12;
1113 /*
1114 * Copy registers into sense buffer.
1115 */
1116 desc[2] = 0x00;
1117 desc[3] = tf->feature; /* == error reg */
1118 desc[5] = tf->nsect;
1119 desc[7] = tf->lbal;
1120 desc[9] = tf->lbam;
1121 desc[11] = tf->lbah;
1122 desc[12] = tf->device;
1123 desc[13] = tf->command; /* == status reg */
1124
1125 /*
1126 * Fill in Extend bit, and the high order bytes
1127 * if applicable.
1128 */
1129 if (tf->flags & ATA_TFLAG_LBA48) {
1130 desc[2] |= 0x01;
1131 desc[4] = tf->hob_nsect;
1132 desc[6] = tf->hob_lbal;
1133 desc[8] = tf->hob_lbam;
1134 desc[10] = tf->hob_lbah;
1135 }
1136 } else {
1137 /* Fixed sense format */
1138 desc[0] = tf->feature;
1139 desc[1] = tf->command; /* status */
1140 desc[2] = tf->device;
1141 desc[3] = tf->nsect;
1142 desc[7] = 0;
1143 if (tf->flags & ATA_TFLAG_LBA48) {
1144 desc[8] |= 0x80;
1145 if (tf->hob_nsect)
1146 desc[8] |= 0x40;
1147 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1148 desc[8] |= 0x20;
1149 }
1150 desc[9] = tf->lbal;
1151 desc[10] = tf->lbam;
1152 desc[11] = tf->lbah;
1153 }
1154}
1155
1156/**
1157 * ata_gen_ata_sense - generate a SCSI fixed sense block
1158 * @qc: Command that we are erroring out
1159 *
1160 * Generate sense block for a failed ATA command @qc. Descriptor
1161 * format is used to accommodate LBA48 block address.
1162 *
1163 * LOCKING:
1164 * None.
1165 */
1166static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1167{
1168 struct ata_device *dev = qc->dev;
1169 struct scsi_cmnd *cmd = qc->scsicmd;
1170 struct ata_taskfile *tf = &qc->result_tf;
1171 unsigned char *sb = cmd->sense_buffer;
1172 int verbose = qc->ap->ops->error_handler == NULL;
1173 u64 block;
1174 u8 sense_key, asc, ascq;
1175
1176 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1177
1178 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1179
1180 if (ata_dev_disabled(dev)) {
1181 /* Device disabled after error recovery */
1182 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1183 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1184 return;
1185 }
1186 /* Use ata_to_sense_error() to map status register bits
1187 * onto sense key, asc & ascq.
1188 */
1189 if (qc->err_mask ||
1190 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1191 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1192 &sense_key, &asc, &ascq, verbose);
1193 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1194 } else {
1195 /* Could not decode error */
1196 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1197 tf->command, qc->err_mask);
1198 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1199 return;
1200 }
1201
1202 block = ata_tf_read_block(&qc->result_tf, dev);
1203 if (block == U64_MAX)
1204 return;
1205
1206 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1207}
1208
1209static void ata_scsi_sdev_config(struct scsi_device *sdev)
1210{
1211 sdev->use_10_for_rw = 1;
1212 sdev->use_10_for_ms = 1;
1213 sdev->no_write_same = 1;
1214
1215 /* Schedule policy is determined by ->qc_defer() callback and
1216 * it needs to see every deferred qc. Set dev_blocked to 1 to
1217 * prevent SCSI midlayer from automatically deferring
1218 * requests.
1219 */
1220 sdev->max_device_blocked = 1;
1221}
1222
1223/**
1224 * atapi_drain_needed - Check whether data transfer may overflow
1225 * @rq: request to be checked
1226 *
1227 * ATAPI commands which transfer variable length data to host
1228 * might overflow due to application error or hardware bug. This
1229 * function checks whether overflow should be drained and ignored
1230 * for @request.
1231 *
1232 * LOCKING:
1233 * None.
1234 *
1235 * RETURNS:
1236 * 1 if ; otherwise, 0.
1237 */
1238static int atapi_drain_needed(struct request *rq)
1239{
1240 if (likely(!blk_rq_is_passthrough(rq)))
1241 return 0;
1242
1243 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1244 return 0;
1245
1246 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1247}
1248
1249static int ata_scsi_dev_config(struct scsi_device *sdev,
1250 struct ata_device *dev)
1251{
1252 struct request_queue *q = sdev->request_queue;
1253
1254 if (!ata_id_has_unload(dev->id))
1255 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1256
1257 /* configure max sectors */
1258 blk_queue_max_hw_sectors(q, dev->max_sectors);
1259
1260 if (dev->class == ATA_DEV_ATAPI) {
1261 void *buf;
1262
1263 sdev->sector_size = ATA_SECT_SIZE;
1264
1265 /* set DMA padding */
1266 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1267
1268 /* configure draining */
1269 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1270 if (!buf) {
1271 ata_dev_err(dev, "drain buffer allocation failed\n");
1272 return -ENOMEM;
1273 }
1274
1275 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1276 } else {
1277 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1278 sdev->manage_start_stop = 1;
1279 }
1280
1281 /*
1282 * ata_pio_sectors() expects buffer for each sector to not cross
1283 * page boundary. Enforce it by requiring buffers to be sector
1284 * aligned, which works iff sector_size is not larger than
1285 * PAGE_SIZE. ATAPI devices also need the alignment as
1286 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1287 */
1288 if (sdev->sector_size > PAGE_SIZE)
1289 ata_dev_warn(dev,
1290 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1291 sdev->sector_size);
1292
1293 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1294
1295 if (dev->flags & ATA_DFLAG_AN)
1296 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1297
1298 if (dev->flags & ATA_DFLAG_NCQ) {
1299 int depth;
1300
1301 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1302 depth = min(ATA_MAX_QUEUE, depth);
1303 scsi_change_queue_depth(sdev, depth);
1304 }
1305
1306 if (dev->flags & ATA_DFLAG_TRUSTED)
1307 sdev->security_supported = 1;
1308
1309 dev->sdev = sdev;
1310 return 0;
1311}
1312
1313/**
1314 * ata_scsi_slave_config - Set SCSI device attributes
1315 * @sdev: SCSI device to examine
1316 *
1317 * This is called before we actually start reading
1318 * and writing to the device, to configure certain
1319 * SCSI mid-layer behaviors.
1320 *
1321 * LOCKING:
1322 * Defined by SCSI layer. We don't really care.
1323 */
1324
1325int ata_scsi_slave_config(struct scsi_device *sdev)
1326{
1327 struct ata_port *ap = ata_shost_to_port(sdev->host);
1328 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1329 int rc = 0;
1330
1331 ata_scsi_sdev_config(sdev);
1332
1333 if (dev)
1334 rc = ata_scsi_dev_config(sdev, dev);
1335
1336 return rc;
1337}
1338
1339/**
1340 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1341 * @sdev: SCSI device to be destroyed
1342 *
1343 * @sdev is about to be destroyed for hot/warm unplugging. If
1344 * this unplugging was initiated by libata as indicated by NULL
1345 * dev->sdev, this function doesn't have to do anything.
1346 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1347 * Clear dev->sdev, schedule the device for ATA detach and invoke
1348 * EH.
1349 *
1350 * LOCKING:
1351 * Defined by SCSI layer. We don't really care.
1352 */
1353void ata_scsi_slave_destroy(struct scsi_device *sdev)
1354{
1355 struct ata_port *ap = ata_shost_to_port(sdev->host);
1356 struct request_queue *q = sdev->request_queue;
1357 unsigned long flags;
1358 struct ata_device *dev;
1359
1360 if (!ap->ops->error_handler)
1361 return;
1362
1363 spin_lock_irqsave(ap->lock, flags);
1364 dev = __ata_scsi_find_dev(ap, sdev);
1365 if (dev && dev->sdev) {
1366 /* SCSI device already in CANCEL state, no need to offline it */
1367 dev->sdev = NULL;
1368 dev->flags |= ATA_DFLAG_DETACH;
1369 ata_port_schedule_eh(ap);
1370 }
1371 spin_unlock_irqrestore(ap->lock, flags);
1372
1373 kfree(q->dma_drain_buffer);
1374 q->dma_drain_buffer = NULL;
1375 q->dma_drain_size = 0;
1376}
1377
1378/**
1379 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1380 * @ap: ATA port to which the device change the queue depth
1381 * @sdev: SCSI device to configure queue depth for
1382 * @queue_depth: new queue depth
1383 *
1384 * libsas and libata have different approaches for associating a sdev to
1385 * its ata_port.
1386 *
1387 */
1388int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1389 int queue_depth)
1390{
1391 struct ata_device *dev;
1392 unsigned long flags;
1393
1394 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1395 return sdev->queue_depth;
1396
1397 dev = ata_scsi_find_dev(ap, sdev);
1398 if (!dev || !ata_dev_enabled(dev))
1399 return sdev->queue_depth;
1400
1401 /* NCQ enabled? */
1402 spin_lock_irqsave(ap->lock, flags);
1403 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1404 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1405 dev->flags |= ATA_DFLAG_NCQ_OFF;
1406 queue_depth = 1;
1407 }
1408 spin_unlock_irqrestore(ap->lock, flags);
1409
1410 /* limit and apply queue depth */
1411 queue_depth = min(queue_depth, sdev->host->can_queue);
1412 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1413 queue_depth = min(queue_depth, ATA_MAX_QUEUE);
1414
1415 if (sdev->queue_depth == queue_depth)
1416 return -EINVAL;
1417
1418 return scsi_change_queue_depth(sdev, queue_depth);
1419}
1420
1421/**
1422 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1423 * @sdev: SCSI device to configure queue depth for
1424 * @queue_depth: new queue depth
1425 *
1426 * This is libata standard hostt->change_queue_depth callback.
1427 * SCSI will call into this callback when user tries to set queue
1428 * depth via sysfs.
1429 *
1430 * LOCKING:
1431 * SCSI layer (we don't care)
1432 *
1433 * RETURNS:
1434 * Newly configured queue depth.
1435 */
1436int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1437{
1438 struct ata_port *ap = ata_shost_to_port(sdev->host);
1439
1440 return __ata_change_queue_depth(ap, sdev, queue_depth);
1441}
1442
1443/**
1444 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1445 * @qc: Storage for translated ATA taskfile
1446 *
1447 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1448 * (to start). Perhaps these commands should be preceded by
1449 * CHECK POWER MODE to see what power mode the device is already in.
1450 * [See SAT revision 5 at www.t10.org]
1451 *
1452 * LOCKING:
1453 * spin_lock_irqsave(host lock)
1454 *
1455 * RETURNS:
1456 * Zero on success, non-zero on error.
1457 */
1458static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1459{
1460 struct scsi_cmnd *scmd = qc->scsicmd;
1461 struct ata_taskfile *tf = &qc->tf;
1462 const u8 *cdb = scmd->cmnd;
1463 u16 fp;
1464 u8 bp = 0xff;
1465
1466 if (scmd->cmd_len < 5) {
1467 fp = 4;
1468 goto invalid_fld;
1469 }
1470
1471 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1472 tf->protocol = ATA_PROT_NODATA;
1473 if (cdb[1] & 0x1) {
1474 ; /* ignore IMMED bit, violates sat-r05 */
1475 }
1476 if (cdb[4] & 0x2) {
1477 fp = 4;
1478 bp = 1;
1479 goto invalid_fld; /* LOEJ bit set not supported */
1480 }
1481 if (((cdb[4] >> 4) & 0xf) != 0) {
1482 fp = 4;
1483 bp = 3;
1484 goto invalid_fld; /* power conditions not supported */
1485 }
1486
1487 if (cdb[4] & 0x1) {
1488 tf->nsect = 1; /* 1 sector, lba=0 */
1489
1490 if (qc->dev->flags & ATA_DFLAG_LBA) {
1491 tf->flags |= ATA_TFLAG_LBA;
1492
1493 tf->lbah = 0x0;
1494 tf->lbam = 0x0;
1495 tf->lbal = 0x0;
1496 tf->device |= ATA_LBA;
1497 } else {
1498 /* CHS */
1499 tf->lbal = 0x1; /* sect */
1500 tf->lbam = 0x0; /* cyl low */
1501 tf->lbah = 0x0; /* cyl high */
1502 }
1503
1504 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1505 } else {
1506 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1507 * or S5) causing some drives to spin up and down again.
1508 */
1509 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1510 system_state == SYSTEM_POWER_OFF)
1511 goto skip;
1512
1513 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1514 system_entering_hibernation())
1515 goto skip;
1516
1517 /* Issue ATA STANDBY IMMEDIATE command */
1518 tf->command = ATA_CMD_STANDBYNOW1;
1519 }
1520
1521 /*
1522 * Standby and Idle condition timers could be implemented but that
1523 * would require libata to implement the Power condition mode page
1524 * and allow the user to change it. Changing mode pages requires
1525 * MODE SELECT to be implemented.
1526 */
1527
1528 return 0;
1529
1530 invalid_fld:
1531 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1532 return 1;
1533 skip:
1534 scmd->result = SAM_STAT_GOOD;
1535 return 1;
1536}
1537
1538
1539/**
1540 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1541 * @qc: Storage for translated ATA taskfile
1542 *
1543 * Sets up an ATA taskfile to issue FLUSH CACHE or
1544 * FLUSH CACHE EXT.
1545 *
1546 * LOCKING:
1547 * spin_lock_irqsave(host lock)
1548 *
1549 * RETURNS:
1550 * Zero on success, non-zero on error.
1551 */
1552static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1553{
1554 struct ata_taskfile *tf = &qc->tf;
1555
1556 tf->flags |= ATA_TFLAG_DEVICE;
1557 tf->protocol = ATA_PROT_NODATA;
1558
1559 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1560 tf->command = ATA_CMD_FLUSH_EXT;
1561 else
1562 tf->command = ATA_CMD_FLUSH;
1563
1564 /* flush is critical for IO integrity, consider it an IO command */
1565 qc->flags |= ATA_QCFLAG_IO;
1566
1567 return 0;
1568}
1569
1570/**
1571 * scsi_6_lba_len - Get LBA and transfer length
1572 * @cdb: SCSI command to translate
1573 *
1574 * Calculate LBA and transfer length for 6-byte commands.
1575 *
1576 * RETURNS:
1577 * @plba: the LBA
1578 * @plen: the transfer length
1579 */
1580static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1581{
1582 u64 lba = 0;
1583 u32 len;
1584
1585 VPRINTK("six-byte command\n");
1586
1587 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1588 lba |= ((u64)cdb[2]) << 8;
1589 lba |= ((u64)cdb[3]);
1590
1591 len = cdb[4];
1592
1593 *plba = lba;
1594 *plen = len;
1595}
1596
1597/**
1598 * scsi_10_lba_len - Get LBA and transfer length
1599 * @cdb: SCSI command to translate
1600 *
1601 * Calculate LBA and transfer length for 10-byte commands.
1602 *
1603 * RETURNS:
1604 * @plba: the LBA
1605 * @plen: the transfer length
1606 */
1607static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1608{
1609 u64 lba = 0;
1610 u32 len = 0;
1611
1612 VPRINTK("ten-byte command\n");
1613
1614 lba |= ((u64)cdb[2]) << 24;
1615 lba |= ((u64)cdb[3]) << 16;
1616 lba |= ((u64)cdb[4]) << 8;
1617 lba |= ((u64)cdb[5]);
1618
1619 len |= ((u32)cdb[7]) << 8;
1620 len |= ((u32)cdb[8]);
1621
1622 *plba = lba;
1623 *plen = len;
1624}
1625
1626/**
1627 * scsi_16_lba_len - Get LBA and transfer length
1628 * @cdb: SCSI command to translate
1629 *
1630 * Calculate LBA and transfer length for 16-byte commands.
1631 *
1632 * RETURNS:
1633 * @plba: the LBA
1634 * @plen: the transfer length
1635 */
1636static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1637{
1638 u64 lba = 0;
1639 u32 len = 0;
1640
1641 VPRINTK("sixteen-byte command\n");
1642
1643 lba |= ((u64)cdb[2]) << 56;
1644 lba |= ((u64)cdb[3]) << 48;
1645 lba |= ((u64)cdb[4]) << 40;
1646 lba |= ((u64)cdb[5]) << 32;
1647 lba |= ((u64)cdb[6]) << 24;
1648 lba |= ((u64)cdb[7]) << 16;
1649 lba |= ((u64)cdb[8]) << 8;
1650 lba |= ((u64)cdb[9]);
1651
1652 len |= ((u32)cdb[10]) << 24;
1653 len |= ((u32)cdb[11]) << 16;
1654 len |= ((u32)cdb[12]) << 8;
1655 len |= ((u32)cdb[13]);
1656
1657 *plba = lba;
1658 *plen = len;
1659}
1660
1661/**
1662 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1663 * @qc: Storage for translated ATA taskfile
1664 *
1665 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1666 *
1667 * LOCKING:
1668 * spin_lock_irqsave(host lock)
1669 *
1670 * RETURNS:
1671 * Zero on success, non-zero on error.
1672 */
1673static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1674{
1675 struct scsi_cmnd *scmd = qc->scsicmd;
1676 struct ata_taskfile *tf = &qc->tf;
1677 struct ata_device *dev = qc->dev;
1678 u64 dev_sectors = qc->dev->n_sectors;
1679 const u8 *cdb = scmd->cmnd;
1680 u64 block;
1681 u32 n_block;
1682 u16 fp;
1683
1684 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1685 tf->protocol = ATA_PROT_NODATA;
1686
1687 if (cdb[0] == VERIFY) {
1688 if (scmd->cmd_len < 10) {
1689 fp = 9;
1690 goto invalid_fld;
1691 }
1692 scsi_10_lba_len(cdb, &block, &n_block);
1693 } else if (cdb[0] == VERIFY_16) {
1694 if (scmd->cmd_len < 16) {
1695 fp = 15;
1696 goto invalid_fld;
1697 }
1698 scsi_16_lba_len(cdb, &block, &n_block);
1699 } else {
1700 fp = 0;
1701 goto invalid_fld;
1702 }
1703
1704 if (!n_block)
1705 goto nothing_to_do;
1706 if (block >= dev_sectors)
1707 goto out_of_range;
1708 if ((block + n_block) > dev_sectors)
1709 goto out_of_range;
1710
1711 if (dev->flags & ATA_DFLAG_LBA) {
1712 tf->flags |= ATA_TFLAG_LBA;
1713
1714 if (lba_28_ok(block, n_block)) {
1715 /* use LBA28 */
1716 tf->command = ATA_CMD_VERIFY;
1717 tf->device |= (block >> 24) & 0xf;
1718 } else if (lba_48_ok(block, n_block)) {
1719 if (!(dev->flags & ATA_DFLAG_LBA48))
1720 goto out_of_range;
1721
1722 /* use LBA48 */
1723 tf->flags |= ATA_TFLAG_LBA48;
1724 tf->command = ATA_CMD_VERIFY_EXT;
1725
1726 tf->hob_nsect = (n_block >> 8) & 0xff;
1727
1728 tf->hob_lbah = (block >> 40) & 0xff;
1729 tf->hob_lbam = (block >> 32) & 0xff;
1730 tf->hob_lbal = (block >> 24) & 0xff;
1731 } else
1732 /* request too large even for LBA48 */
1733 goto out_of_range;
1734
1735 tf->nsect = n_block & 0xff;
1736
1737 tf->lbah = (block >> 16) & 0xff;
1738 tf->lbam = (block >> 8) & 0xff;
1739 tf->lbal = block & 0xff;
1740
1741 tf->device |= ATA_LBA;
1742 } else {
1743 /* CHS */
1744 u32 sect, head, cyl, track;
1745
1746 if (!lba_28_ok(block, n_block))
1747 goto out_of_range;
1748
1749 /* Convert LBA to CHS */
1750 track = (u32)block / dev->sectors;
1751 cyl = track / dev->heads;
1752 head = track % dev->heads;
1753 sect = (u32)block % dev->sectors + 1;
1754
1755 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1756 (u32)block, track, cyl, head, sect);
1757
1758 /* Check whether the converted CHS can fit.
1759 Cylinder: 0-65535
1760 Head: 0-15
1761 Sector: 1-255*/
1762 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1763 goto out_of_range;
1764
1765 tf->command = ATA_CMD_VERIFY;
1766 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1767 tf->lbal = sect;
1768 tf->lbam = cyl;
1769 tf->lbah = cyl >> 8;
1770 tf->device |= head;
1771 }
1772
1773 return 0;
1774
1775invalid_fld:
1776 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1777 return 1;
1778
1779out_of_range:
1780 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1781 /* "Logical Block Address out of range" */
1782 return 1;
1783
1784nothing_to_do:
1785 scmd->result = SAM_STAT_GOOD;
1786 return 1;
1787}
1788
1789static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1790{
1791 struct request *rq = scmd->request;
1792 u32 req_blocks;
1793
1794 if (!blk_rq_is_passthrough(rq))
1795 return true;
1796
1797 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1798 if (n_blocks > req_blocks)
1799 return false;
1800
1801 return true;
1802}
1803
1804/**
1805 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1806 * @qc: Storage for translated ATA taskfile
1807 *
1808 * Converts any of six SCSI read/write commands into the
1809 * ATA counterpart, including starting sector (LBA),
1810 * sector count, and taking into account the device's LBA48
1811 * support.
1812 *
1813 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1814 * %WRITE_16 are currently supported.
1815 *
1816 * LOCKING:
1817 * spin_lock_irqsave(host lock)
1818 *
1819 * RETURNS:
1820 * Zero on success, non-zero on error.
1821 */
1822static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1823{
1824 struct scsi_cmnd *scmd = qc->scsicmd;
1825 const u8 *cdb = scmd->cmnd;
1826 struct request *rq = scmd->request;
1827 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1828 unsigned int tf_flags = 0;
1829 u64 block;
1830 u32 n_block;
1831 int rc;
1832 u16 fp = 0;
1833
1834 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1835 tf_flags |= ATA_TFLAG_WRITE;
1836
1837 /* Calculate the SCSI LBA, transfer length and FUA. */
1838 switch (cdb[0]) {
1839 case READ_10:
1840 case WRITE_10:
1841 if (unlikely(scmd->cmd_len < 10)) {
1842 fp = 9;
1843 goto invalid_fld;
1844 }
1845 scsi_10_lba_len(cdb, &block, &n_block);
1846 if (cdb[1] & (1 << 3))
1847 tf_flags |= ATA_TFLAG_FUA;
1848 if (!ata_check_nblocks(scmd, n_block))
1849 goto invalid_fld;
1850 break;
1851 case READ_6:
1852 case WRITE_6:
1853 if (unlikely(scmd->cmd_len < 6)) {
1854 fp = 5;
1855 goto invalid_fld;
1856 }
1857 scsi_6_lba_len(cdb, &block, &n_block);
1858
1859 /* for 6-byte r/w commands, transfer length 0
1860 * means 256 blocks of data, not 0 block.
1861 */
1862 if (!n_block)
1863 n_block = 256;
1864 if (!ata_check_nblocks(scmd, n_block))
1865 goto invalid_fld;
1866 break;
1867 case READ_16:
1868 case WRITE_16:
1869 if (unlikely(scmd->cmd_len < 16)) {
1870 fp = 15;
1871 goto invalid_fld;
1872 }
1873 scsi_16_lba_len(cdb, &block, &n_block);
1874 if (cdb[1] & (1 << 3))
1875 tf_flags |= ATA_TFLAG_FUA;
1876 if (!ata_check_nblocks(scmd, n_block))
1877 goto invalid_fld;
1878 break;
1879 default:
1880 DPRINTK("no-byte command\n");
1881 fp = 0;
1882 goto invalid_fld;
1883 }
1884
1885 /* Check and compose ATA command */
1886 if (!n_block)
1887 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1888 * length 0 means transfer 0 block of data.
1889 * However, for ATA R/W commands, sector count 0 means
1890 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1891 *
1892 * WARNING: one or two older ATA drives treat 0 as 0...
1893 */
1894 goto nothing_to_do;
1895
1896 qc->flags |= ATA_QCFLAG_IO;
1897 qc->nbytes = n_block * scmd->device->sector_size;
1898
1899 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1900 qc->hw_tag, class);
1901
1902 if (likely(rc == 0))
1903 return 0;
1904
1905 if (rc == -ERANGE)
1906 goto out_of_range;
1907 /* treat all other errors as -EINVAL, fall through */
1908invalid_fld:
1909 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1910 return 1;
1911
1912out_of_range:
1913 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1914 /* "Logical Block Address out of range" */
1915 return 1;
1916
1917nothing_to_do:
1918 scmd->result = SAM_STAT_GOOD;
1919 return 1;
1920}
1921
1922static void ata_qc_done(struct ata_queued_cmd *qc)
1923{
1924 struct scsi_cmnd *cmd = qc->scsicmd;
1925 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1926
1927 ata_qc_free(qc);
1928 done(cmd);
1929}
1930
1931static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1932{
1933 struct ata_port *ap = qc->ap;
1934 struct scsi_cmnd *cmd = qc->scsicmd;
1935 u8 *cdb = cmd->cmnd;
1936 int need_sense = (qc->err_mask != 0);
1937
1938 /* For ATA pass thru (SAT) commands, generate a sense block if
1939 * user mandated it or if there's an error. Note that if we
1940 * generate because the user forced us to [CK_COND =1], a check
1941 * condition is generated and the ATA register values are returned
1942 * whether the command completed successfully or not. If there
1943 * was no error, we use the following sense data:
1944 * sk = RECOVERED ERROR
1945 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1946 */
1947 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1948 ((cdb[2] & 0x20) || need_sense))
1949 ata_gen_passthru_sense(qc);
1950 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1951 cmd->result = SAM_STAT_CHECK_CONDITION;
1952 else if (need_sense)
1953 ata_gen_ata_sense(qc);
1954 else
1955 cmd->result = SAM_STAT_GOOD;
1956
1957 if (need_sense && !ap->ops->error_handler)
1958 ata_dump_status(ap->print_id, &qc->result_tf);
1959
1960 ata_qc_done(qc);
1961}
1962
1963/**
1964 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1965 * @dev: ATA device to which the command is addressed
1966 * @cmd: SCSI command to execute
1967 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1968 *
1969 * Our ->queuecommand() function has decided that the SCSI
1970 * command issued can be directly translated into an ATA
1971 * command, rather than handled internally.
1972 *
1973 * This function sets up an ata_queued_cmd structure for the
1974 * SCSI command, and sends that ata_queued_cmd to the hardware.
1975 *
1976 * The xlat_func argument (actor) returns 0 if ready to execute
1977 * ATA command, else 1 to finish translation. If 1 is returned
1978 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1979 * to be set reflecting an error condition or clean (early)
1980 * termination.
1981 *
1982 * LOCKING:
1983 * spin_lock_irqsave(host lock)
1984 *
1985 * RETURNS:
1986 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1987 * needs to be deferred.
1988 */
1989static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1990 ata_xlat_func_t xlat_func)
1991{
1992 struct ata_port *ap = dev->link->ap;
1993 struct ata_queued_cmd *qc;
1994 int rc;
1995
1996 VPRINTK("ENTER\n");
1997
1998 qc = ata_scsi_qc_new(dev, cmd);
1999 if (!qc)
2000 goto err_mem;
2001
2002 /* data is present; dma-map it */
2003 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2004 cmd->sc_data_direction == DMA_TO_DEVICE) {
2005 if (unlikely(scsi_bufflen(cmd) < 1)) {
2006 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2007 goto err_did;
2008 }
2009
2010 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2011
2012 qc->dma_dir = cmd->sc_data_direction;
2013 }
2014
2015 qc->complete_fn = ata_scsi_qc_complete;
2016
2017 if (xlat_func(qc))
2018 goto early_finish;
2019
2020 if (ap->ops->qc_defer) {
2021 if ((rc = ap->ops->qc_defer(qc)))
2022 goto defer;
2023 }
2024
2025 /* select device, send command to hardware */
2026 ata_qc_issue(qc);
2027
2028 VPRINTK("EXIT\n");
2029 return 0;
2030
2031early_finish:
2032 ata_qc_free(qc);
2033 cmd->scsi_done(cmd);
2034 DPRINTK("EXIT - early finish (good or error)\n");
2035 return 0;
2036
2037err_did:
2038 ata_qc_free(qc);
2039 cmd->result = (DID_ERROR << 16);
2040 cmd->scsi_done(cmd);
2041err_mem:
2042 DPRINTK("EXIT - internal\n");
2043 return 0;
2044
2045defer:
2046 ata_qc_free(qc);
2047 DPRINTK("EXIT - defer\n");
2048 if (rc == ATA_DEFER_LINK)
2049 return SCSI_MLQUEUE_DEVICE_BUSY;
2050 else
2051 return SCSI_MLQUEUE_HOST_BUSY;
2052}
2053
2054struct ata_scsi_args {
2055 struct ata_device *dev;
2056 u16 *id;
2057 struct scsi_cmnd *cmd;
2058};
2059
2060/**
2061 * ata_scsi_rbuf_get - Map response buffer.
2062 * @cmd: SCSI command containing buffer to be mapped.
2063 * @flags: unsigned long variable to store irq enable status
2064 * @copy_in: copy in from user buffer
2065 *
2066 * Prepare buffer for simulated SCSI commands.
2067 *
2068 * LOCKING:
2069 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2070 *
2071 * RETURNS:
2072 * Pointer to response buffer.
2073 */
2074static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2075 unsigned long *flags)
2076{
2077 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2078
2079 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2080 if (copy_in)
2081 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2082 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2083 return ata_scsi_rbuf;
2084}
2085
2086/**
2087 * ata_scsi_rbuf_put - Unmap response buffer.
2088 * @cmd: SCSI command containing buffer to be unmapped.
2089 * @copy_out: copy out result
2090 * @flags: @flags passed to ata_scsi_rbuf_get()
2091 *
2092 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2093 * @copy_back is true.
2094 *
2095 * LOCKING:
2096 * Unlocks ata_scsi_rbuf_lock.
2097 */
2098static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2099 unsigned long *flags)
2100{
2101 if (copy_out)
2102 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2103 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2104 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2105}
2106
2107/**
2108 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2109 * @args: device IDENTIFY data / SCSI command of interest.
2110 * @actor: Callback hook for desired SCSI command simulator
2111 *
2112 * Takes care of the hard work of simulating a SCSI command...
2113 * Mapping the response buffer, calling the command's handler,
2114 * and handling the handler's return value. This return value
2115 * indicates whether the handler wishes the SCSI command to be
2116 * completed successfully (0), or not (in which case cmd->result
2117 * and sense buffer are assumed to be set).
2118 *
2119 * LOCKING:
2120 * spin_lock_irqsave(host lock)
2121 */
2122static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2123 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2124{
2125 u8 *rbuf;
2126 unsigned int rc;
2127 struct scsi_cmnd *cmd = args->cmd;
2128 unsigned long flags;
2129
2130 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2131 rc = actor(args, rbuf);
2132 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2133
2134 if (rc == 0)
2135 cmd->result = SAM_STAT_GOOD;
2136}
2137
2138/**
2139 * ata_scsiop_inq_std - Simulate INQUIRY command
2140 * @args: device IDENTIFY data / SCSI command of interest.
2141 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2142 *
2143 * Returns standard device identification data associated
2144 * with non-VPD INQUIRY command output.
2145 *
2146 * LOCKING:
2147 * spin_lock_irqsave(host lock)
2148 */
2149static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2150{
2151 static const u8 versions[] = {
2152 0x00,
2153 0x60, /* SAM-3 (no version claimed) */
2154
2155 0x03,
2156 0x20, /* SBC-2 (no version claimed) */
2157
2158 0x03,
2159 0x00 /* SPC-3 (no version claimed) */
2160 };
2161 static const u8 versions_zbc[] = {
2162 0x00,
2163 0xA0, /* SAM-5 (no version claimed) */
2164
2165 0x06,
2166 0x00, /* SBC-4 (no version claimed) */
2167
2168 0x05,
2169 0xC0, /* SPC-5 (no version claimed) */
2170
2171 0x60,
2172 0x24, /* ZBC r05 */
2173 };
2174
2175 u8 hdr[] = {
2176 TYPE_DISK,
2177 0,
2178 0x5, /* claim SPC-3 version compatibility */
2179 2,
2180 95 - 4,
2181 0,
2182 0,
2183 2
2184 };
2185
2186 VPRINTK("ENTER\n");
2187
2188 /* set scsi removable (RMB) bit per ata bit, or if the
2189 * AHCI port says it's external (Hotplug-capable, eSATA).
2190 */
2191 if (ata_id_removable(args->id) ||
2192 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2193 hdr[1] |= (1 << 7);
2194
2195 if (args->dev->class == ATA_DEV_ZAC) {
2196 hdr[0] = TYPE_ZBC;
2197 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2198 }
2199
2200 memcpy(rbuf, hdr, sizeof(hdr));
2201 memcpy(&rbuf[8], "ATA ", 8);
2202 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2203
2204 /* From SAT, use last 2 words from fw rev unless they are spaces */
2205 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2206 if (strncmp(&rbuf[32], " ", 4) == 0)
2207 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2208
2209 if (rbuf[32] == 0 || rbuf[32] == ' ')
2210 memcpy(&rbuf[32], "n/a ", 4);
2211
2212 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2213 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2214 else
2215 memcpy(rbuf + 58, versions, sizeof(versions));
2216
2217 return 0;
2218}
2219
2220/**
2221 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2222 * @args: device IDENTIFY data / SCSI command of interest.
2223 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2224 *
2225 * Returns list of inquiry VPD pages available.
2226 *
2227 * LOCKING:
2228 * spin_lock_irqsave(host lock)
2229 */
2230static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2231{
2232 int num_pages;
2233 static const u8 pages[] = {
2234 0x00, /* page 0x00, this page */
2235 0x80, /* page 0x80, unit serial no page */
2236 0x83, /* page 0x83, device ident page */
2237 0x89, /* page 0x89, ata info page */
2238 0xb0, /* page 0xb0, block limits page */
2239 0xb1, /* page 0xb1, block device characteristics page */
2240 0xb2, /* page 0xb2, thin provisioning page */
2241 0xb6, /* page 0xb6, zoned block device characteristics */
2242 };
2243
2244 num_pages = sizeof(pages);
2245 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2246 num_pages--;
2247 rbuf[3] = num_pages; /* number of supported VPD pages */
2248 memcpy(rbuf + 4, pages, num_pages);
2249 return 0;
2250}
2251
2252/**
2253 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2254 * @args: device IDENTIFY data / SCSI command of interest.
2255 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2256 *
2257 * Returns ATA device serial number.
2258 *
2259 * LOCKING:
2260 * spin_lock_irqsave(host lock)
2261 */
2262static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2263{
2264 static const u8 hdr[] = {
2265 0,
2266 0x80, /* this page code */
2267 0,
2268 ATA_ID_SERNO_LEN, /* page len */
2269 };
2270
2271 memcpy(rbuf, hdr, sizeof(hdr));
2272 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2273 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2274 return 0;
2275}
2276
2277/**
2278 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2279 * @args: device IDENTIFY data / SCSI command of interest.
2280 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2281 *
2282 * Yields two logical unit device identification designators:
2283 * - vendor specific ASCII containing the ATA serial number
2284 * - SAT defined "t10 vendor id based" containing ASCII vendor
2285 * name ("ATA "), model and serial numbers.
2286 *
2287 * LOCKING:
2288 * spin_lock_irqsave(host lock)
2289 */
2290static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2291{
2292 const int sat_model_serial_desc_len = 68;
2293 int num;
2294
2295 rbuf[1] = 0x83; /* this page code */
2296 num = 4;
2297
2298 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2299 rbuf[num + 0] = 2;
2300 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2301 num += 4;
2302 ata_id_string(args->id, (unsigned char *) rbuf + num,
2303 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2304 num += ATA_ID_SERNO_LEN;
2305
2306 /* SAT defined lu model and serial numbers descriptor */
2307 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2308 rbuf[num + 0] = 2;
2309 rbuf[num + 1] = 1;
2310 rbuf[num + 3] = sat_model_serial_desc_len;
2311 num += 4;
2312 memcpy(rbuf + num, "ATA ", 8);
2313 num += 8;
2314 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2315 ATA_ID_PROD_LEN);
2316 num += ATA_ID_PROD_LEN;
2317 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2318 ATA_ID_SERNO_LEN);
2319 num += ATA_ID_SERNO_LEN;
2320
2321 if (ata_id_has_wwn(args->id)) {
2322 /* SAT defined lu world wide name */
2323 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2324 rbuf[num + 0] = 1;
2325 rbuf[num + 1] = 3;
2326 rbuf[num + 3] = ATA_ID_WWN_LEN;
2327 num += 4;
2328 ata_id_string(args->id, (unsigned char *) rbuf + num,
2329 ATA_ID_WWN, ATA_ID_WWN_LEN);
2330 num += ATA_ID_WWN_LEN;
2331 }
2332 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2333 return 0;
2334}
2335
2336/**
2337 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2338 * @args: device IDENTIFY data / SCSI command of interest.
2339 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2340 *
2341 * Yields SAT-specified ATA VPD page.
2342 *
2343 * LOCKING:
2344 * spin_lock_irqsave(host lock)
2345 */
2346static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2347{
2348 struct ata_taskfile tf;
2349
2350 memset(&tf, 0, sizeof(tf));
2351
2352 rbuf[1] = 0x89; /* our page code */
2353 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2354 rbuf[3] = (0x238 & 0xff);
2355
2356 memcpy(&rbuf[8], "linux ", 8);
2357 memcpy(&rbuf[16], "libata ", 16);
2358 memcpy(&rbuf[32], DRV_VERSION, 4);
2359
2360 /* we don't store the ATA device signature, so we fake it */
2361
2362 tf.command = ATA_DRDY; /* really, this is Status reg */
2363 tf.lbal = 0x1;
2364 tf.nsect = 0x1;
2365
2366 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2367 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2368
2369 rbuf[56] = ATA_CMD_ID_ATA;
2370
2371 memcpy(&rbuf[60], &args->id[0], 512);
2372 return 0;
2373}
2374
2375static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2376{
2377 u16 min_io_sectors;
2378
2379 rbuf[1] = 0xb0;
2380 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2381
2382 /*
2383 * Optimal transfer length granularity.
2384 *
2385 * This is always one physical block, but for disks with a smaller
2386 * logical than physical sector size we need to figure out what the
2387 * latter is.
2388 */
2389 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2390 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2391
2392 /*
2393 * Optimal unmap granularity.
2394 *
2395 * The ATA spec doesn't even know about a granularity or alignment
2396 * for the TRIM command. We can leave away most of the unmap related
2397 * VPD page entries, but we have specifify a granularity to signal
2398 * that we support some form of unmap - in thise case via WRITE SAME
2399 * with the unmap bit set.
2400 */
2401 if (ata_id_has_trim(args->id)) {
2402 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2403 put_unaligned_be32(1, &rbuf[28]);
2404 }
2405
2406 return 0;
2407}
2408
2409static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2410{
2411 int form_factor = ata_id_form_factor(args->id);
2412 int media_rotation_rate = ata_id_rotation_rate(args->id);
2413 u8 zoned = ata_id_zoned_cap(args->id);
2414
2415 rbuf[1] = 0xb1;
2416 rbuf[3] = 0x3c;
2417 rbuf[4] = media_rotation_rate >> 8;
2418 rbuf[5] = media_rotation_rate;
2419 rbuf[7] = form_factor;
2420 if (zoned)
2421 rbuf[8] = (zoned << 4);
2422
2423 return 0;
2424}
2425
2426static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2427{
2428 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2429 rbuf[1] = 0xb2;
2430 rbuf[3] = 0x4;
2431 rbuf[5] = 1 << 6; /* TPWS */
2432
2433 return 0;
2434}
2435
2436static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2437{
2438 /*
2439 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2440 */
2441 rbuf[1] = 0xb6;
2442 rbuf[3] = 0x3C;
2443
2444 /*
2445 * URSWRZ bit is only meaningful for host-managed ZAC drives
2446 */
2447 if (args->dev->zac_zoned_cap & 1)
2448 rbuf[4] |= 1;
2449 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2450 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2451 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2452
2453 return 0;
2454}
2455
2456/**
2457 * modecpy - Prepare response for MODE SENSE
2458 * @dest: output buffer
2459 * @src: data being copied
2460 * @n: length of mode page
2461 * @changeable: whether changeable parameters are requested
2462 *
2463 * Generate a generic MODE SENSE page for either current or changeable
2464 * parameters.
2465 *
2466 * LOCKING:
2467 * None.
2468 */
2469static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2470{
2471 if (changeable) {
2472 memcpy(dest, src, 2);
2473 memset(dest + 2, 0, n - 2);
2474 } else {
2475 memcpy(dest, src, n);
2476 }
2477}
2478
2479/**
2480 * ata_msense_caching - Simulate MODE SENSE caching info page
2481 * @id: device IDENTIFY data
2482 * @buf: output buffer
2483 * @changeable: whether changeable parameters are requested
2484 *
2485 * Generate a caching info page, which conditionally indicates
2486 * write caching to the SCSI layer, depending on device
2487 * capabilities.
2488 *
2489 * LOCKING:
2490 * None.
2491 */
2492static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2493{
2494 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2495 if (changeable) {
2496 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2497 } else {
2498 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2499 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2500 }
2501 return sizeof(def_cache_mpage);
2502}
2503
2504/**
2505 * ata_msense_control - Simulate MODE SENSE control mode page
2506 * @dev: ATA device of interest
2507 * @buf: output buffer
2508 * @changeable: whether changeable parameters are requested
2509 *
2510 * Generate a generic MODE SENSE control mode page.
2511 *
2512 * LOCKING:
2513 * None.
2514 */
2515static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2516 bool changeable)
2517{
2518 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2519 if (changeable) {
2520 buf[2] |= (1 << 2); /* ata_mselect_control() */
2521 } else {
2522 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2523
2524 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2525 }
2526 return sizeof(def_control_mpage);
2527}
2528
2529/**
2530 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2531 * @buf: output buffer
2532 * @changeable: whether changeable parameters are requested
2533 *
2534 * Generate a generic MODE SENSE r/w error recovery page.
2535 *
2536 * LOCKING:
2537 * None.
2538 */
2539static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2540{
2541 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2542 changeable);
2543 return sizeof(def_rw_recovery_mpage);
2544}
2545
2546/*
2547 * We can turn this into a real blacklist if it's needed, for now just
2548 * blacklist any Maxtor BANC1G10 revision firmware
2549 */
2550static int ata_dev_supports_fua(u16 *id)
2551{
2552 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2553
2554 if (!libata_fua)
2555 return 0;
2556 if (!ata_id_has_fua(id))
2557 return 0;
2558
2559 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2560 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2561
2562 if (strcmp(model, "Maxtor"))
2563 return 1;
2564 if (strcmp(fw, "BANC1G10"))
2565 return 1;
2566
2567 return 0; /* blacklisted */
2568}
2569
2570/**
2571 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2572 * @args: device IDENTIFY data / SCSI command of interest.
2573 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2574 *
2575 * Simulate MODE SENSE commands. Assume this is invoked for direct
2576 * access devices (e.g. disks) only. There should be no block
2577 * descriptor for other device types.
2578 *
2579 * LOCKING:
2580 * spin_lock_irqsave(host lock)
2581 */
2582static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2583{
2584 struct ata_device *dev = args->dev;
2585 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2586 static const u8 sat_blk_desc[] = {
2587 0, 0, 0, 0, /* number of blocks: sat unspecified */
2588 0,
2589 0, 0x2, 0x0 /* block length: 512 bytes */
2590 };
2591 u8 pg, spg;
2592 unsigned int ebd, page_control, six_byte;
2593 u8 dpofua, bp = 0xff;
2594 u16 fp;
2595
2596 VPRINTK("ENTER\n");
2597
2598 six_byte = (scsicmd[0] == MODE_SENSE);
2599 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2600 /*
2601 * LLBA bit in msense(10) ignored (compliant)
2602 */
2603
2604 page_control = scsicmd[2] >> 6;
2605 switch (page_control) {
2606 case 0: /* current */
2607 case 1: /* changeable */
2608 case 2: /* defaults */
2609 break; /* supported */
2610 case 3: /* saved */
2611 goto saving_not_supp;
2612 default:
2613 fp = 2;
2614 bp = 6;
2615 goto invalid_fld;
2616 }
2617
2618 if (six_byte)
2619 p += 4 + (ebd ? 8 : 0);
2620 else
2621 p += 8 + (ebd ? 8 : 0);
2622
2623 pg = scsicmd[2] & 0x3f;
2624 spg = scsicmd[3];
2625 /*
2626 * No mode subpages supported (yet) but asking for _all_
2627 * subpages may be valid
2628 */
2629 if (spg && (spg != ALL_SUB_MPAGES)) {
2630 fp = 3;
2631 goto invalid_fld;
2632 }
2633
2634 switch(pg) {
2635 case RW_RECOVERY_MPAGE:
2636 p += ata_msense_rw_recovery(p, page_control == 1);
2637 break;
2638
2639 case CACHE_MPAGE:
2640 p += ata_msense_caching(args->id, p, page_control == 1);
2641 break;
2642
2643 case CONTROL_MPAGE:
2644 p += ata_msense_control(args->dev, p, page_control == 1);
2645 break;
2646
2647 case ALL_MPAGES:
2648 p += ata_msense_rw_recovery(p, page_control == 1);
2649 p += ata_msense_caching(args->id, p, page_control == 1);
2650 p += ata_msense_control(args->dev, p, page_control == 1);
2651 break;
2652
2653 default: /* invalid page code */
2654 fp = 2;
2655 goto invalid_fld;
2656 }
2657
2658 dpofua = 0;
2659 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2660 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2661 dpofua = 1 << 4;
2662
2663 if (six_byte) {
2664 rbuf[0] = p - rbuf - 1;
2665 rbuf[2] |= dpofua;
2666 if (ebd) {
2667 rbuf[3] = sizeof(sat_blk_desc);
2668 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2669 }
2670 } else {
2671 unsigned int output_len = p - rbuf - 2;
2672
2673 rbuf[0] = output_len >> 8;
2674 rbuf[1] = output_len;
2675 rbuf[3] |= dpofua;
2676 if (ebd) {
2677 rbuf[7] = sizeof(sat_blk_desc);
2678 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2679 }
2680 }
2681 return 0;
2682
2683invalid_fld:
2684 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2685 return 1;
2686
2687saving_not_supp:
2688 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2689 /* "Saving parameters not supported" */
2690 return 1;
2691}
2692
2693/**
2694 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2695 * @args: device IDENTIFY data / SCSI command of interest.
2696 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2697 *
2698 * Simulate READ CAPACITY commands.
2699 *
2700 * LOCKING:
2701 * None.
2702 */
2703static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2704{
2705 struct ata_device *dev = args->dev;
2706 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2707 u32 sector_size; /* physical sector size in bytes */
2708 u8 log2_per_phys;
2709 u16 lowest_aligned;
2710
2711 sector_size = ata_id_logical_sector_size(dev->id);
2712 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2713 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2714
2715 VPRINTK("ENTER\n");
2716
2717 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2718 if (last_lba >= 0xffffffffULL)
2719 last_lba = 0xffffffff;
2720
2721 /* sector count, 32-bit */
2722 rbuf[0] = last_lba >> (8 * 3);
2723 rbuf[1] = last_lba >> (8 * 2);
2724 rbuf[2] = last_lba >> (8 * 1);
2725 rbuf[3] = last_lba;
2726
2727 /* sector size */
2728 rbuf[4] = sector_size >> (8 * 3);
2729 rbuf[5] = sector_size >> (8 * 2);
2730 rbuf[6] = sector_size >> (8 * 1);
2731 rbuf[7] = sector_size;
2732 } else {
2733 /* sector count, 64-bit */
2734 rbuf[0] = last_lba >> (8 * 7);
2735 rbuf[1] = last_lba >> (8 * 6);
2736 rbuf[2] = last_lba >> (8 * 5);
2737 rbuf[3] = last_lba >> (8 * 4);
2738 rbuf[4] = last_lba >> (8 * 3);
2739 rbuf[5] = last_lba >> (8 * 2);
2740 rbuf[6] = last_lba >> (8 * 1);
2741 rbuf[7] = last_lba;
2742
2743 /* sector size */
2744 rbuf[ 8] = sector_size >> (8 * 3);
2745 rbuf[ 9] = sector_size >> (8 * 2);
2746 rbuf[10] = sector_size >> (8 * 1);
2747 rbuf[11] = sector_size;
2748
2749 rbuf[12] = 0;
2750 rbuf[13] = log2_per_phys;
2751 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2752 rbuf[15] = lowest_aligned;
2753
2754 if (ata_id_has_trim(args->id) &&
2755 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2756 rbuf[14] |= 0x80; /* LBPME */
2757
2758 if (ata_id_has_zero_after_trim(args->id) &&
2759 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2760 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2761 rbuf[14] |= 0x40; /* LBPRZ */
2762 }
2763 }
2764 if (ata_id_zoned_cap(args->id) ||
2765 args->dev->class == ATA_DEV_ZAC)
2766 rbuf[12] = (1 << 4); /* RC_BASIS */
2767 }
2768 return 0;
2769}
2770
2771/**
2772 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2773 * @args: device IDENTIFY data / SCSI command of interest.
2774 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2775 *
2776 * Simulate REPORT LUNS command.
2777 *
2778 * LOCKING:
2779 * spin_lock_irqsave(host lock)
2780 */
2781static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2782{
2783 VPRINTK("ENTER\n");
2784 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2785
2786 return 0;
2787}
2788
2789static void atapi_sense_complete(struct ata_queued_cmd *qc)
2790{
2791 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2792 /* FIXME: not quite right; we don't want the
2793 * translation of taskfile registers into
2794 * a sense descriptors, since that's only
2795 * correct for ATA, not ATAPI
2796 */
2797 ata_gen_passthru_sense(qc);
2798 }
2799
2800 ata_qc_done(qc);
2801}
2802
2803/* is it pointless to prefer PIO for "safety reasons"? */
2804static inline int ata_pio_use_silly(struct ata_port *ap)
2805{
2806 return (ap->flags & ATA_FLAG_PIO_DMA);
2807}
2808
2809static void atapi_request_sense(struct ata_queued_cmd *qc)
2810{
2811 struct ata_port *ap = qc->ap;
2812 struct scsi_cmnd *cmd = qc->scsicmd;
2813
2814 DPRINTK("ATAPI request sense\n");
2815
2816 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2817
2818#ifdef CONFIG_ATA_SFF
2819 if (ap->ops->sff_tf_read)
2820 ap->ops->sff_tf_read(ap, &qc->tf);
2821#endif
2822
2823 /* fill these in, for the case where they are -not- overwritten */
2824 cmd->sense_buffer[0] = 0x70;
2825 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2826
2827 ata_qc_reinit(qc);
2828
2829 /* setup sg table and init transfer direction */
2830 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2831 ata_sg_init(qc, &qc->sgent, 1);
2832 qc->dma_dir = DMA_FROM_DEVICE;
2833
2834 memset(&qc->cdb, 0, qc->dev->cdb_len);
2835 qc->cdb[0] = REQUEST_SENSE;
2836 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2837
2838 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2839 qc->tf.command = ATA_CMD_PACKET;
2840
2841 if (ata_pio_use_silly(ap)) {
2842 qc->tf.protocol = ATAPI_PROT_DMA;
2843 qc->tf.feature |= ATAPI_PKT_DMA;
2844 } else {
2845 qc->tf.protocol = ATAPI_PROT_PIO;
2846 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2847 qc->tf.lbah = 0;
2848 }
2849 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2850
2851 qc->complete_fn = atapi_sense_complete;
2852
2853 ata_qc_issue(qc);
2854
2855 DPRINTK("EXIT\n");
2856}
2857
2858/*
2859 * ATAPI devices typically report zero for their SCSI version, and sometimes
2860 * deviate from the spec WRT response data format. If SCSI version is
2861 * reported as zero like normal, then we make the following fixups:
2862 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2863 * modern device.
2864 * 2) Ensure response data format / ATAPI information are always correct.
2865 */
2866static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2867{
2868 u8 buf[4];
2869
2870 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2871 if (buf[2] == 0) {
2872 buf[2] = 0x5;
2873 buf[3] = 0x32;
2874 }
2875 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2876}
2877
2878static void atapi_qc_complete(struct ata_queued_cmd *qc)
2879{
2880 struct scsi_cmnd *cmd = qc->scsicmd;
2881 unsigned int err_mask = qc->err_mask;
2882
2883 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2884
2885 /* handle completion from new EH */
2886 if (unlikely(qc->ap->ops->error_handler &&
2887 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2888
2889 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2890 /* FIXME: not quite right; we don't want the
2891 * translation of taskfile registers into a
2892 * sense descriptors, since that's only
2893 * correct for ATA, not ATAPI
2894 */
2895 ata_gen_passthru_sense(qc);
2896 }
2897
2898 /* SCSI EH automatically locks door if sdev->locked is
2899 * set. Sometimes door lock request continues to
2900 * fail, for example, when no media is present. This
2901 * creates a loop - SCSI EH issues door lock which
2902 * fails and gets invoked again to acquire sense data
2903 * for the failed command.
2904 *
2905 * If door lock fails, always clear sdev->locked to
2906 * avoid this infinite loop.
2907 *
2908 * This may happen before SCSI scan is complete. Make
2909 * sure qc->dev->sdev isn't NULL before dereferencing.
2910 */
2911 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2912 qc->dev->sdev->locked = 0;
2913
2914 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2915 ata_qc_done(qc);
2916 return;
2917 }
2918
2919 /* successful completion or old EH failure path */
2920 if (unlikely(err_mask & AC_ERR_DEV)) {
2921 cmd->result = SAM_STAT_CHECK_CONDITION;
2922 atapi_request_sense(qc);
2923 return;
2924 } else if (unlikely(err_mask)) {
2925 /* FIXME: not quite right; we don't want the
2926 * translation of taskfile registers into
2927 * a sense descriptors, since that's only
2928 * correct for ATA, not ATAPI
2929 */
2930 ata_gen_passthru_sense(qc);
2931 } else {
2932 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2933 atapi_fixup_inquiry(cmd);
2934 cmd->result = SAM_STAT_GOOD;
2935 }
2936
2937 ata_qc_done(qc);
2938}
2939/**
2940 * atapi_xlat - Initialize PACKET taskfile
2941 * @qc: command structure to be initialized
2942 *
2943 * LOCKING:
2944 * spin_lock_irqsave(host lock)
2945 *
2946 * RETURNS:
2947 * Zero on success, non-zero on failure.
2948 */
2949static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2950{
2951 struct scsi_cmnd *scmd = qc->scsicmd;
2952 struct ata_device *dev = qc->dev;
2953 int nodata = (scmd->sc_data_direction == DMA_NONE);
2954 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2955 unsigned int nbytes;
2956
2957 memset(qc->cdb, 0, dev->cdb_len);
2958 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2959
2960 qc->complete_fn = atapi_qc_complete;
2961
2962 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2963 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2964 qc->tf.flags |= ATA_TFLAG_WRITE;
2965 DPRINTK("direction: write\n");
2966 }
2967
2968 qc->tf.command = ATA_CMD_PACKET;
2969 ata_qc_set_pc_nbytes(qc);
2970
2971 /* check whether ATAPI DMA is safe */
2972 if (!nodata && !using_pio && atapi_check_dma(qc))
2973 using_pio = 1;
2974
2975 /* Some controller variants snoop this value for Packet
2976 * transfers to do state machine and FIFO management. Thus we
2977 * want to set it properly, and for DMA where it is
2978 * effectively meaningless.
2979 */
2980 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2981
2982 /* Most ATAPI devices which honor transfer chunk size don't
2983 * behave according to the spec when odd chunk size which
2984 * matches the transfer length is specified. If the number of
2985 * bytes to transfer is 2n+1. According to the spec, what
2986 * should happen is to indicate that 2n+1 is going to be
2987 * transferred and transfer 2n+2 bytes where the last byte is
2988 * padding.
2989 *
2990 * In practice, this doesn't happen. ATAPI devices first
2991 * indicate and transfer 2n bytes and then indicate and
2992 * transfer 2 bytes where the last byte is padding.
2993 *
2994 * This inconsistency confuses several controllers which
2995 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2996 * These controllers use actual number of transferred bytes to
2997 * update DMA pointer and transfer of 4n+2 bytes make those
2998 * controller push DMA pointer by 4n+4 bytes because SATA data
2999 * FISes are aligned to 4 bytes. This causes data corruption
3000 * and buffer overrun.
3001 *
3002 * Always setting nbytes to even number solves this problem
3003 * because then ATAPI devices don't have to split data at 2n
3004 * boundaries.
3005 */
3006 if (nbytes & 0x1)
3007 nbytes++;
3008
3009 qc->tf.lbam = (nbytes & 0xFF);
3010 qc->tf.lbah = (nbytes >> 8);
3011
3012 if (nodata)
3013 qc->tf.protocol = ATAPI_PROT_NODATA;
3014 else if (using_pio)
3015 qc->tf.protocol = ATAPI_PROT_PIO;
3016 else {
3017 /* DMA data xfer */
3018 qc->tf.protocol = ATAPI_PROT_DMA;
3019 qc->tf.feature |= ATAPI_PKT_DMA;
3020
3021 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3022 (scmd->sc_data_direction != DMA_TO_DEVICE))
3023 /* some SATA bridges need us to indicate data xfer direction */
3024 qc->tf.feature |= ATAPI_DMADIR;
3025 }
3026
3027
3028 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3029 as ATAPI tape drives don't get this right otherwise */
3030 return 0;
3031}
3032
3033static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3034{
3035 if (!sata_pmp_attached(ap)) {
3036 if (likely(devno >= 0 &&
3037 devno < ata_link_max_devices(&ap->link)))
3038 return &ap->link.device[devno];
3039 } else {
3040 if (likely(devno >= 0 &&
3041 devno < ap->nr_pmp_links))
3042 return &ap->pmp_link[devno].device[0];
3043 }
3044
3045 return NULL;
3046}
3047
3048static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3049 const struct scsi_device *scsidev)
3050{
3051 int devno;
3052
3053 /* skip commands not addressed to targets we simulate */
3054 if (!sata_pmp_attached(ap)) {
3055 if (unlikely(scsidev->channel || scsidev->lun))
3056 return NULL;
3057 devno = scsidev->id;
3058 } else {
3059 if (unlikely(scsidev->id || scsidev->lun))
3060 return NULL;
3061 devno = scsidev->channel;
3062 }
3063
3064 return ata_find_dev(ap, devno);
3065}
3066
3067/**
3068 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3069 * @ap: ATA port to which the device is attached
3070 * @scsidev: SCSI device from which we derive the ATA device
3071 *
3072 * Given various information provided in struct scsi_cmnd,
3073 * map that onto an ATA bus, and using that mapping
3074 * determine which ata_device is associated with the
3075 * SCSI command to be sent.
3076 *
3077 * LOCKING:
3078 * spin_lock_irqsave(host lock)
3079 *
3080 * RETURNS:
3081 * Associated ATA device, or %NULL if not found.
3082 */
3083static struct ata_device *
3084ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3085{
3086 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3087
3088 if (unlikely(!dev || !ata_dev_enabled(dev)))
3089 return NULL;
3090
3091 return dev;
3092}
3093
3094/*
3095 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3096 * @byte1: Byte 1 from pass-thru CDB.
3097 *
3098 * RETURNS:
3099 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3100 */
3101static u8
3102ata_scsi_map_proto(u8 byte1)
3103{
3104 switch((byte1 & 0x1e) >> 1) {
3105 case 3: /* Non-data */
3106 return ATA_PROT_NODATA;
3107
3108 case 6: /* DMA */
3109 case 10: /* UDMA Data-in */
3110 case 11: /* UDMA Data-Out */
3111 return ATA_PROT_DMA;
3112
3113 case 4: /* PIO Data-in */
3114 case 5: /* PIO Data-out */
3115 return ATA_PROT_PIO;
3116
3117 case 12: /* FPDMA */
3118 return ATA_PROT_NCQ;
3119
3120 case 0: /* Hard Reset */
3121 case 1: /* SRST */
3122 case 8: /* Device Diagnostic */
3123 case 9: /* Device Reset */
3124 case 7: /* DMA Queued */
3125 case 15: /* Return Response Info */
3126 default: /* Reserved */
3127 break;
3128 }
3129
3130 return ATA_PROT_UNKNOWN;
3131}
3132
3133/**
3134 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3135 * @qc: command structure to be initialized
3136 *
3137 * Handles either 12, 16, or 32-byte versions of the CDB.
3138 *
3139 * RETURNS:
3140 * Zero on success, non-zero on failure.
3141 */
3142static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3143{
3144 struct ata_taskfile *tf = &(qc->tf);
3145 struct scsi_cmnd *scmd = qc->scsicmd;
3146 struct ata_device *dev = qc->dev;
3147 const u8 *cdb = scmd->cmnd;
3148 u16 fp;
3149 u16 cdb_offset = 0;
3150
3151 /* 7Fh variable length cmd means a ata pass-thru(32) */
3152 if (cdb[0] == VARIABLE_LENGTH_CMD)
3153 cdb_offset = 9;
3154
3155 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3156 if (tf->protocol == ATA_PROT_UNKNOWN) {
3157 fp = 1;
3158 goto invalid_fld;
3159 }
3160
3161 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0)
3162 tf->protocol = ATA_PROT_NCQ_NODATA;
3163
3164 /* enable LBA */
3165 tf->flags |= ATA_TFLAG_LBA;
3166
3167 /*
3168 * 12 and 16 byte CDBs use different offsets to
3169 * provide the various register values.
3170 */
3171 if (cdb[0] == ATA_16) {
3172 /*
3173 * 16-byte CDB - may contain extended commands.
3174 *
3175 * If that is the case, copy the upper byte register values.
3176 */
3177 if (cdb[1] & 0x01) {
3178 tf->hob_feature = cdb[3];
3179 tf->hob_nsect = cdb[5];
3180 tf->hob_lbal = cdb[7];
3181 tf->hob_lbam = cdb[9];
3182 tf->hob_lbah = cdb[11];
3183 tf->flags |= ATA_TFLAG_LBA48;
3184 } else
3185 tf->flags &= ~ATA_TFLAG_LBA48;
3186
3187 /*
3188 * Always copy low byte, device and command registers.
3189 */
3190 tf->feature = cdb[4];
3191 tf->nsect = cdb[6];
3192 tf->lbal = cdb[8];
3193 tf->lbam = cdb[10];
3194 tf->lbah = cdb[12];
3195 tf->device = cdb[13];
3196 tf->command = cdb[14];
3197 } else if (cdb[0] == ATA_12) {
3198 /*
3199 * 12-byte CDB - incapable of extended commands.
3200 */
3201 tf->flags &= ~ATA_TFLAG_LBA48;
3202
3203 tf->feature = cdb[3];
3204 tf->nsect = cdb[4];
3205 tf->lbal = cdb[5];
3206 tf->lbam = cdb[6];
3207 tf->lbah = cdb[7];
3208 tf->device = cdb[8];
3209 tf->command = cdb[9];
3210 } else {
3211 /*
3212 * 32-byte CDB - may contain extended command fields.
3213 *
3214 * If that is the case, copy the upper byte register values.
3215 */
3216 if (cdb[10] & 0x01) {
3217 tf->hob_feature = cdb[20];
3218 tf->hob_nsect = cdb[22];
3219 tf->hob_lbal = cdb[16];
3220 tf->hob_lbam = cdb[15];
3221 tf->hob_lbah = cdb[14];
3222 tf->flags |= ATA_TFLAG_LBA48;
3223 } else
3224 tf->flags &= ~ATA_TFLAG_LBA48;
3225
3226 tf->feature = cdb[21];
3227 tf->nsect = cdb[23];
3228 tf->lbal = cdb[19];
3229 tf->lbam = cdb[18];
3230 tf->lbah = cdb[17];
3231 tf->device = cdb[24];
3232 tf->command = cdb[25];
3233 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3234 }
3235
3236 /* For NCQ commands copy the tag value */
3237 if (ata_is_ncq(tf->protocol))
3238 tf->nsect = qc->hw_tag << 3;
3239
3240 /* enforce correct master/slave bit */
3241 tf->device = dev->devno ?
3242 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3243
3244 switch (tf->command) {
3245 /* READ/WRITE LONG use a non-standard sect_size */
3246 case ATA_CMD_READ_LONG:
3247 case ATA_CMD_READ_LONG_ONCE:
3248 case ATA_CMD_WRITE_LONG:
3249 case ATA_CMD_WRITE_LONG_ONCE:
3250 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3251 fp = 1;
3252 goto invalid_fld;
3253 }
3254 qc->sect_size = scsi_bufflen(scmd);
3255 break;
3256
3257 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3258 case ATA_CMD_CFA_WRITE_NE:
3259 case ATA_CMD_CFA_TRANS_SECT:
3260 case ATA_CMD_CFA_WRITE_MULT_NE:
3261 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3262 case ATA_CMD_READ:
3263 case ATA_CMD_READ_EXT:
3264 case ATA_CMD_READ_QUEUED:
3265 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3266 case ATA_CMD_FPDMA_READ:
3267 case ATA_CMD_READ_MULTI:
3268 case ATA_CMD_READ_MULTI_EXT:
3269 case ATA_CMD_PIO_READ:
3270 case ATA_CMD_PIO_READ_EXT:
3271 case ATA_CMD_READ_STREAM_DMA_EXT:
3272 case ATA_CMD_READ_STREAM_EXT:
3273 case ATA_CMD_VERIFY:
3274 case ATA_CMD_VERIFY_EXT:
3275 case ATA_CMD_WRITE:
3276 case ATA_CMD_WRITE_EXT:
3277 case ATA_CMD_WRITE_FUA_EXT:
3278 case ATA_CMD_WRITE_QUEUED:
3279 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3280 case ATA_CMD_FPDMA_WRITE:
3281 case ATA_CMD_WRITE_MULTI:
3282 case ATA_CMD_WRITE_MULTI_EXT:
3283 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3284 case ATA_CMD_PIO_WRITE:
3285 case ATA_CMD_PIO_WRITE_EXT:
3286 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3287 case ATA_CMD_WRITE_STREAM_EXT:
3288 qc->sect_size = scmd->device->sector_size;
3289 break;
3290
3291 /* Everything else uses 512 byte "sectors" */
3292 default:
3293 qc->sect_size = ATA_SECT_SIZE;
3294 }
3295
3296 /*
3297 * Set flags so that all registers will be written, pass on
3298 * write indication (used for PIO/DMA setup), result TF is
3299 * copied back and we don't whine too much about its failure.
3300 */
3301 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3302 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3303 tf->flags |= ATA_TFLAG_WRITE;
3304
3305 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3306
3307 /*
3308 * Set transfer length.
3309 *
3310 * TODO: find out if we need to do more here to
3311 * cover scatter/gather case.
3312 */
3313 ata_qc_set_pc_nbytes(qc);
3314
3315 /* We may not issue DMA commands if no DMA mode is set */
3316 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3317 fp = 1;
3318 goto invalid_fld;
3319 }
3320
3321 /* We may not issue NCQ commands to devices not supporting NCQ */
3322 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3323 fp = 1;
3324 goto invalid_fld;
3325 }
3326
3327 /* sanity check for pio multi commands */
3328 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3329 fp = 1;
3330 goto invalid_fld;
3331 }
3332
3333 if (is_multi_taskfile(tf)) {
3334 unsigned int multi_count = 1 << (cdb[1] >> 5);
3335
3336 /* compare the passed through multi_count
3337 * with the cached multi_count of libata
3338 */
3339 if (multi_count != dev->multi_count)
3340 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3341 multi_count);
3342 }
3343
3344 /*
3345 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3346 * SET_FEATURES - XFER MODE must be preceded/succeeded
3347 * by an update to hardware-specific registers for each
3348 * controller (i.e. the reason for ->set_piomode(),
3349 * ->set_dmamode(), and ->post_set_mode() hooks).
3350 */
3351 if (tf->command == ATA_CMD_SET_FEATURES &&
3352 tf->feature == SETFEATURES_XFER) {
3353 fp = (cdb[0] == ATA_16) ? 4 : 3;
3354 goto invalid_fld;
3355 }
3356
3357 /*
3358 * Filter TPM commands by default. These provide an
3359 * essentially uncontrolled encrypted "back door" between
3360 * applications and the disk. Set libata.allow_tpm=1 if you
3361 * have a real reason for wanting to use them. This ensures
3362 * that installed software cannot easily mess stuff up without
3363 * user intent. DVR type users will probably ship with this enabled
3364 * for movie content management.
3365 *
3366 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3367 * for this and should do in future but that it is not sufficient as
3368 * DCS is an optional feature set. Thus we also do the software filter
3369 * so that we comply with the TC consortium stated goal that the user
3370 * can turn off TC features of their system.
3371 */
3372 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3373 fp = (cdb[0] == ATA_16) ? 14 : 9;
3374 goto invalid_fld;
3375 }
3376
3377 return 0;
3378
3379 invalid_fld:
3380 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3381 return 1;
3382}
3383
3384/**
3385 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3386 * @cmd: SCSI command being translated
3387 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3388 * @sector: Starting sector
3389 * @count: Total Range of request in logical sectors
3390 *
3391 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3392 * descriptor.
3393 *
3394 * Upto 64 entries of the format:
3395 * 63:48 Range Length
3396 * 47:0 LBA
3397 *
3398 * Range Length of 0 is ignored.
3399 * LBA's should be sorted order and not overlap.
3400 *
3401 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3402 *
3403 * Return: Number of bytes copied into sglist.
3404 */
3405static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3406 u64 sector, u32 count)
3407{
3408 struct scsi_device *sdp = cmd->device;
3409 size_t len = sdp->sector_size;
3410 size_t r;
3411 __le64 *buf;
3412 u32 i = 0;
3413 unsigned long flags;
3414
3415 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3416
3417 if (len > ATA_SCSI_RBUF_SIZE)
3418 len = ATA_SCSI_RBUF_SIZE;
3419
3420 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3421 buf = ((void *)ata_scsi_rbuf);
3422 memset(buf, 0, len);
3423 while (i < trmax) {
3424 u64 entry = sector |
3425 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3426 buf[i++] = __cpu_to_le64(entry);
3427 if (count <= 0xffff)
3428 break;
3429 count -= 0xffff;
3430 sector += 0xffff;
3431 }
3432 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3433 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3434
3435 return r;
3436}
3437
3438/**
3439 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3440 * @qc: Command to be translated
3441 *
3442 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3443 * an SCT Write Same command.
3444 * Based on WRITE SAME has the UNMAP flag:
3445 *
3446 * - When set translate to DSM TRIM
3447 * - When clear translate to SCT Write Same
3448 */
3449static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3450{
3451 struct ata_taskfile *tf = &qc->tf;
3452 struct scsi_cmnd *scmd = qc->scsicmd;
3453 struct scsi_device *sdp = scmd->device;
3454 size_t len = sdp->sector_size;
3455 struct ata_device *dev = qc->dev;
3456 const u8 *cdb = scmd->cmnd;
3457 u64 block;
3458 u32 n_block;
3459 const u32 trmax = len >> 3;
3460 u32 size;
3461 u16 fp;
3462 u8 bp = 0xff;
3463 u8 unmap = cdb[1] & 0x8;
3464
3465 /* we may not issue DMA commands if no DMA mode is set */
3466 if (unlikely(!dev->dma_mode))
3467 goto invalid_opcode;
3468
3469 /*
3470 * We only allow sending this command through the block layer,
3471 * as it modifies the DATA OUT buffer, which would corrupt user
3472 * memory for SG_IO commands.
3473 */
3474 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3475 goto invalid_opcode;
3476
3477 if (unlikely(scmd->cmd_len < 16)) {
3478 fp = 15;
3479 goto invalid_fld;
3480 }
3481 scsi_16_lba_len(cdb, &block, &n_block);
3482
3483 if (!unmap ||
3484 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3485 !ata_id_has_trim(dev->id)) {
3486 fp = 1;
3487 bp = 3;
3488 goto invalid_fld;
3489 }
3490 /* If the request is too large the cmd is invalid */
3491 if (n_block > 0xffff * trmax) {
3492 fp = 2;
3493 goto invalid_fld;
3494 }
3495
3496 /*
3497 * WRITE SAME always has a sector sized buffer as payload, this
3498 * should never be a multiple entry S/G list.
3499 */
3500 if (!scsi_sg_count(scmd))
3501 goto invalid_param_len;
3502
3503 /*
3504 * size must match sector size in bytes
3505 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3506 * is defined as number of 512 byte blocks to be transferred.
3507 */
3508
3509 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3510 if (size != len)
3511 goto invalid_param_len;
3512
3513 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3514 /* Newer devices support queued TRIM commands */
3515 tf->protocol = ATA_PROT_NCQ;
3516 tf->command = ATA_CMD_FPDMA_SEND;
3517 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3518 tf->nsect = qc->hw_tag << 3;
3519 tf->hob_feature = (size / 512) >> 8;
3520 tf->feature = size / 512;
3521
3522 tf->auxiliary = 1;
3523 } else {
3524 tf->protocol = ATA_PROT_DMA;
3525 tf->hob_feature = 0;
3526 tf->feature = ATA_DSM_TRIM;
3527 tf->hob_nsect = (size / 512) >> 8;
3528 tf->nsect = size / 512;
3529 tf->command = ATA_CMD_DSM;
3530 }
3531
3532 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3533 ATA_TFLAG_WRITE;
3534
3535 ata_qc_set_pc_nbytes(qc);
3536
3537 return 0;
3538
3539invalid_fld:
3540 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3541 return 1;
3542invalid_param_len:
3543 /* "Parameter list length error" */
3544 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3545 return 1;
3546invalid_opcode:
3547 /* "Invalid command operation code" */
3548 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3549 return 1;
3550}
3551
3552/**
3553 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3554 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3555 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3556 *
3557 * Yields a subset to satisfy scsi_report_opcode()
3558 *
3559 * LOCKING:
3560 * spin_lock_irqsave(host lock)
3561 */
3562static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3563{
3564 struct ata_device *dev = args->dev;
3565 u8 *cdb = args->cmd->cmnd;
3566 u8 supported = 0;
3567 unsigned int err = 0;
3568
3569 if (cdb[2] != 1) {
3570 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3571 err = 2;
3572 goto out;
3573 }
3574 switch (cdb[3]) {
3575 case INQUIRY:
3576 case MODE_SENSE:
3577 case MODE_SENSE_10:
3578 case READ_CAPACITY:
3579 case SERVICE_ACTION_IN_16:
3580 case REPORT_LUNS:
3581 case REQUEST_SENSE:
3582 case SYNCHRONIZE_CACHE:
3583 case REZERO_UNIT:
3584 case SEEK_6:
3585 case SEEK_10:
3586 case TEST_UNIT_READY:
3587 case SEND_DIAGNOSTIC:
3588 case MAINTENANCE_IN:
3589 case READ_6:
3590 case READ_10:
3591 case READ_16:
3592 case WRITE_6:
3593 case WRITE_10:
3594 case WRITE_16:
3595 case ATA_12:
3596 case ATA_16:
3597 case VERIFY:
3598 case VERIFY_16:
3599 case MODE_SELECT:
3600 case MODE_SELECT_10:
3601 case START_STOP:
3602 supported = 3;
3603 break;
3604 case ZBC_IN:
3605 case ZBC_OUT:
3606 if (ata_id_zoned_cap(dev->id) ||
3607 dev->class == ATA_DEV_ZAC)
3608 supported = 3;
3609 break;
3610 case SECURITY_PROTOCOL_IN:
3611 case SECURITY_PROTOCOL_OUT:
3612 if (dev->flags & ATA_DFLAG_TRUSTED)
3613 supported = 3;
3614 break;
3615 default:
3616 break;
3617 }
3618out:
3619 rbuf[1] = supported; /* supported */
3620 return err;
3621}
3622
3623/**
3624 * ata_scsi_report_zones_complete - convert ATA output
3625 * @qc: command structure returning the data
3626 *
3627 * Convert T-13 little-endian field representation into
3628 * T-10 big-endian field representation.
3629 * What a mess.
3630 */
3631static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3632{
3633 struct scsi_cmnd *scmd = qc->scsicmd;
3634 struct sg_mapping_iter miter;
3635 unsigned long flags;
3636 unsigned int bytes = 0;
3637
3638 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3639 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3640
3641 local_irq_save(flags);
3642 while (sg_miter_next(&miter)) {
3643 unsigned int offset = 0;
3644
3645 if (bytes == 0) {
3646 char *hdr;
3647 u32 list_length;
3648 u64 max_lba, opt_lba;
3649 u16 same;
3650
3651 /* Swizzle header */
3652 hdr = miter.addr;
3653 list_length = get_unaligned_le32(&hdr[0]);
3654 same = get_unaligned_le16(&hdr[4]);
3655 max_lba = get_unaligned_le64(&hdr[8]);
3656 opt_lba = get_unaligned_le64(&hdr[16]);
3657 put_unaligned_be32(list_length, &hdr[0]);
3658 hdr[4] = same & 0xf;
3659 put_unaligned_be64(max_lba, &hdr[8]);
3660 put_unaligned_be64(opt_lba, &hdr[16]);
3661 offset += 64;
3662 bytes += 64;
3663 }
3664 while (offset < miter.length) {
3665 char *rec;
3666 u8 cond, type, non_seq, reset;
3667 u64 size, start, wp;
3668
3669 /* Swizzle zone descriptor */
3670 rec = miter.addr + offset;
3671 type = rec[0] & 0xf;
3672 cond = (rec[1] >> 4) & 0xf;
3673 non_seq = (rec[1] & 2);
3674 reset = (rec[1] & 1);
3675 size = get_unaligned_le64(&rec[8]);
3676 start = get_unaligned_le64(&rec[16]);
3677 wp = get_unaligned_le64(&rec[24]);
3678 rec[0] = type;
3679 rec[1] = (cond << 4) | non_seq | reset;
3680 put_unaligned_be64(size, &rec[8]);
3681 put_unaligned_be64(start, &rec[16]);
3682 put_unaligned_be64(wp, &rec[24]);
3683 WARN_ON(offset + 64 > miter.length);
3684 offset += 64;
3685 bytes += 64;
3686 }
3687 }
3688 sg_miter_stop(&miter);
3689 local_irq_restore(flags);
3690
3691 ata_scsi_qc_complete(qc);
3692}
3693
3694static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3695{
3696 struct ata_taskfile *tf = &qc->tf;
3697 struct scsi_cmnd *scmd = qc->scsicmd;
3698 const u8 *cdb = scmd->cmnd;
3699 u16 sect, fp = (u16)-1;
3700 u8 sa, options, bp = 0xff;
3701 u64 block;
3702 u32 n_block;
3703
3704 if (unlikely(scmd->cmd_len < 16)) {
3705 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3706 scmd->cmd_len);
3707 fp = 15;
3708 goto invalid_fld;
3709 }
3710 scsi_16_lba_len(cdb, &block, &n_block);
3711 if (n_block != scsi_bufflen(scmd)) {
3712 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3713 n_block, scsi_bufflen(scmd));
3714 goto invalid_param_len;
3715 }
3716 sa = cdb[1] & 0x1f;
3717 if (sa != ZI_REPORT_ZONES) {
3718 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3719 fp = 1;
3720 goto invalid_fld;
3721 }
3722 /*
3723 * ZAC allows only for transfers in 512 byte blocks,
3724 * and uses a 16 bit value for the transfer count.
3725 */
3726 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3727 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3728 goto invalid_param_len;
3729 }
3730 sect = n_block / 512;
3731 options = cdb[14] & 0xbf;
3732
3733 if (ata_ncq_enabled(qc->dev) &&
3734 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3735 tf->protocol = ATA_PROT_NCQ;
3736 tf->command = ATA_CMD_FPDMA_RECV;
3737 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3738 tf->nsect = qc->hw_tag << 3;
3739 tf->feature = sect & 0xff;
3740 tf->hob_feature = (sect >> 8) & 0xff;
3741 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3742 } else {
3743 tf->command = ATA_CMD_ZAC_MGMT_IN;
3744 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3745 tf->protocol = ATA_PROT_DMA;
3746 tf->hob_feature = options;
3747 tf->hob_nsect = (sect >> 8) & 0xff;
3748 tf->nsect = sect & 0xff;
3749 }
3750 tf->device = ATA_LBA;
3751 tf->lbah = (block >> 16) & 0xff;
3752 tf->lbam = (block >> 8) & 0xff;
3753 tf->lbal = block & 0xff;
3754 tf->hob_lbah = (block >> 40) & 0xff;
3755 tf->hob_lbam = (block >> 32) & 0xff;
3756 tf->hob_lbal = (block >> 24) & 0xff;
3757
3758 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3759 qc->flags |= ATA_QCFLAG_RESULT_TF;
3760
3761 ata_qc_set_pc_nbytes(qc);
3762
3763 qc->complete_fn = ata_scsi_report_zones_complete;
3764
3765 return 0;
3766
3767invalid_fld:
3768 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3769 return 1;
3770
3771invalid_param_len:
3772 /* "Parameter list length error" */
3773 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3774 return 1;
3775}
3776
3777static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3778{
3779 struct ata_taskfile *tf = &qc->tf;
3780 struct scsi_cmnd *scmd = qc->scsicmd;
3781 struct ata_device *dev = qc->dev;
3782 const u8 *cdb = scmd->cmnd;
3783 u8 all, sa;
3784 u64 block;
3785 u32 n_block;
3786 u16 fp = (u16)-1;
3787
3788 if (unlikely(scmd->cmd_len < 16)) {
3789 fp = 15;
3790 goto invalid_fld;
3791 }
3792
3793 sa = cdb[1] & 0x1f;
3794 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3795 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3796 fp = 1;
3797 goto invalid_fld;
3798 }
3799
3800 scsi_16_lba_len(cdb, &block, &n_block);
3801 if (n_block) {
3802 /*
3803 * ZAC MANAGEMENT OUT doesn't define any length
3804 */
3805 goto invalid_param_len;
3806 }
3807
3808 all = cdb[14] & 0x1;
3809 if (all) {
3810 /*
3811 * Ignore the block address (zone ID) as defined by ZBC.
3812 */
3813 block = 0;
3814 } else if (block >= dev->n_sectors) {
3815 /*
3816 * Block must be a valid zone ID (a zone start LBA).
3817 */
3818 fp = 2;
3819 goto invalid_fld;
3820 }
3821
3822 if (ata_ncq_enabled(qc->dev) &&
3823 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3824 tf->protocol = ATA_PROT_NCQ_NODATA;
3825 tf->command = ATA_CMD_NCQ_NON_DATA;
3826 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3827 tf->nsect = qc->hw_tag << 3;
3828 tf->auxiliary = sa | ((u16)all << 8);
3829 } else {
3830 tf->protocol = ATA_PROT_NODATA;
3831 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3832 tf->feature = sa;
3833 tf->hob_feature = all;
3834 }
3835 tf->lbah = (block >> 16) & 0xff;
3836 tf->lbam = (block >> 8) & 0xff;
3837 tf->lbal = block & 0xff;
3838 tf->hob_lbah = (block >> 40) & 0xff;
3839 tf->hob_lbam = (block >> 32) & 0xff;
3840 tf->hob_lbal = (block >> 24) & 0xff;
3841 tf->device = ATA_LBA;
3842 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3843
3844 return 0;
3845
3846 invalid_fld:
3847 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3848 return 1;
3849invalid_param_len:
3850 /* "Parameter list length error" */
3851 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3852 return 1;
3853}
3854
3855/**
3856 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3857 * @qc: Storage for translated ATA taskfile
3858 * @buf: input buffer
3859 * @len: number of valid bytes in the input buffer
3860 * @fp: out parameter for the failed field on error
3861 *
3862 * Prepare a taskfile to modify caching information for the device.
3863 *
3864 * LOCKING:
3865 * None.
3866 */
3867static int ata_mselect_caching(struct ata_queued_cmd *qc,
3868 const u8 *buf, int len, u16 *fp)
3869{
3870 struct ata_taskfile *tf = &qc->tf;
3871 struct ata_device *dev = qc->dev;
3872 u8 mpage[CACHE_MPAGE_LEN];
3873 u8 wce;
3874 int i;
3875
3876 /*
3877 * The first two bytes of def_cache_mpage are a header, so offsets
3878 * in mpage are off by 2 compared to buf. Same for len.
3879 */
3880
3881 if (len != CACHE_MPAGE_LEN - 2) {
3882 if (len < CACHE_MPAGE_LEN - 2)
3883 *fp = len;
3884 else
3885 *fp = CACHE_MPAGE_LEN - 2;
3886 return -EINVAL;
3887 }
3888
3889 wce = buf[0] & (1 << 2);
3890
3891 /*
3892 * Check that read-only bits are not modified.
3893 */
3894 ata_msense_caching(dev->id, mpage, false);
3895 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3896 if (i == 0)
3897 continue;
3898 if (mpage[i + 2] != buf[i]) {
3899 *fp = i;
3900 return -EINVAL;
3901 }
3902 }
3903
3904 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3905 tf->protocol = ATA_PROT_NODATA;
3906 tf->nsect = 0;
3907 tf->command = ATA_CMD_SET_FEATURES;
3908 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3909 return 0;
3910}
3911
3912/**
3913 * ata_mselect_control - Simulate MODE SELECT for control page
3914 * @qc: Storage for translated ATA taskfile
3915 * @buf: input buffer
3916 * @len: number of valid bytes in the input buffer
3917 * @fp: out parameter for the failed field on error
3918 *
3919 * Prepare a taskfile to modify caching information for the device.
3920 *
3921 * LOCKING:
3922 * None.
3923 */
3924static int ata_mselect_control(struct ata_queued_cmd *qc,
3925 const u8 *buf, int len, u16 *fp)
3926{
3927 struct ata_device *dev = qc->dev;
3928 u8 mpage[CONTROL_MPAGE_LEN];
3929 u8 d_sense;
3930 int i;
3931
3932 /*
3933 * The first two bytes of def_control_mpage are a header, so offsets
3934 * in mpage are off by 2 compared to buf. Same for len.
3935 */
3936
3937 if (len != CONTROL_MPAGE_LEN - 2) {
3938 if (len < CONTROL_MPAGE_LEN - 2)
3939 *fp = len;
3940 else
3941 *fp = CONTROL_MPAGE_LEN - 2;
3942 return -EINVAL;
3943 }
3944
3945 d_sense = buf[0] & (1 << 2);
3946
3947 /*
3948 * Check that read-only bits are not modified.
3949 */
3950 ata_msense_control(dev, mpage, false);
3951 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3952 if (i == 0)
3953 continue;
3954 if (mpage[2 + i] != buf[i]) {
3955 *fp = i;
3956 return -EINVAL;
3957 }
3958 }
3959 if (d_sense & (1 << 2))
3960 dev->flags |= ATA_DFLAG_D_SENSE;
3961 else
3962 dev->flags &= ~ATA_DFLAG_D_SENSE;
3963 return 0;
3964}
3965
3966/**
3967 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3968 * @qc: Storage for translated ATA taskfile
3969 *
3970 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3971 * Assume this is invoked for direct access devices (e.g. disks) only.
3972 * There should be no block descriptor for other device types.
3973 *
3974 * LOCKING:
3975 * spin_lock_irqsave(host lock)
3976 */
3977static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3978{
3979 struct scsi_cmnd *scmd = qc->scsicmd;
3980 const u8 *cdb = scmd->cmnd;
3981 const u8 *p;
3982 u8 pg, spg;
3983 unsigned six_byte, pg_len, hdr_len, bd_len;
3984 int len;
3985 u16 fp = (u16)-1;
3986 u8 bp = 0xff;
3987
3988 VPRINTK("ENTER\n");
3989
3990 six_byte = (cdb[0] == MODE_SELECT);
3991 if (six_byte) {
3992 if (scmd->cmd_len < 5) {
3993 fp = 4;
3994 goto invalid_fld;
3995 }
3996
3997 len = cdb[4];
3998 hdr_len = 4;
3999 } else {
4000 if (scmd->cmd_len < 9) {
4001 fp = 8;
4002 goto invalid_fld;
4003 }
4004
4005 len = (cdb[7] << 8) + cdb[8];
4006 hdr_len = 8;
4007 }
4008
4009 /* We only support PF=1, SP=0. */
4010 if ((cdb[1] & 0x11) != 0x10) {
4011 fp = 1;
4012 bp = (cdb[1] & 0x01) ? 1 : 5;
4013 goto invalid_fld;
4014 }
4015
4016 /* Test early for possible overrun. */
4017 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4018 goto invalid_param_len;
4019
4020 p = page_address(sg_page(scsi_sglist(scmd)));
4021
4022 /* Move past header and block descriptors. */
4023 if (len < hdr_len)
4024 goto invalid_param_len;
4025
4026 if (six_byte)
4027 bd_len = p[3];
4028 else
4029 bd_len = (p[6] << 8) + p[7];
4030
4031 len -= hdr_len;
4032 p += hdr_len;
4033 if (len < bd_len)
4034 goto invalid_param_len;
4035 if (bd_len != 0 && bd_len != 8) {
4036 fp = (six_byte) ? 3 : 6;
4037 fp += bd_len + hdr_len;
4038 goto invalid_param;
4039 }
4040
4041 len -= bd_len;
4042 p += bd_len;
4043 if (len == 0)
4044 goto skip;
4045
4046 /* Parse both possible formats for the mode page headers. */
4047 pg = p[0] & 0x3f;
4048 if (p[0] & 0x40) {
4049 if (len < 4)
4050 goto invalid_param_len;
4051
4052 spg = p[1];
4053 pg_len = (p[2] << 8) | p[3];
4054 p += 4;
4055 len -= 4;
4056 } else {
4057 if (len < 2)
4058 goto invalid_param_len;
4059
4060 spg = 0;
4061 pg_len = p[1];
4062 p += 2;
4063 len -= 2;
4064 }
4065
4066 /*
4067 * No mode subpages supported (yet) but asking for _all_
4068 * subpages may be valid
4069 */
4070 if (spg && (spg != ALL_SUB_MPAGES)) {
4071 fp = (p[0] & 0x40) ? 1 : 0;
4072 fp += hdr_len + bd_len;
4073 goto invalid_param;
4074 }
4075 if (pg_len > len)
4076 goto invalid_param_len;
4077
4078 switch (pg) {
4079 case CACHE_MPAGE:
4080 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4081 fp += hdr_len + bd_len;
4082 goto invalid_param;
4083 }
4084 break;
4085 case CONTROL_MPAGE:
4086 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4087 fp += hdr_len + bd_len;
4088 goto invalid_param;
4089 } else {
4090 goto skip; /* No ATA command to send */
4091 }
4092 break;
4093 default: /* invalid page code */
4094 fp = bd_len + hdr_len;
4095 goto invalid_param;
4096 }
4097
4098 /*
4099 * Only one page has changeable data, so we only support setting one
4100 * page at a time.
4101 */
4102 if (len > pg_len)
4103 goto invalid_param;
4104
4105 return 0;
4106
4107 invalid_fld:
4108 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4109 return 1;
4110
4111 invalid_param:
4112 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4113 return 1;
4114
4115 invalid_param_len:
4116 /* "Parameter list length error" */
4117 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4118 return 1;
4119
4120 skip:
4121 scmd->result = SAM_STAT_GOOD;
4122 return 1;
4123}
4124
4125static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
4126{
4127 if (len == 0)
4128 return ATA_CMD_TRUSTED_NONDATA;
4129 else if (send)
4130 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
4131 else
4132 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
4133}
4134
4135static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
4136{
4137 struct scsi_cmnd *scmd = qc->scsicmd;
4138 const u8 *cdb = scmd->cmnd;
4139 struct ata_taskfile *tf = &qc->tf;
4140 u8 secp = cdb[1];
4141 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
4142 u16 spsp = get_unaligned_be16(&cdb[2]);
4143 u32 len = get_unaligned_be32(&cdb[6]);
4144 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4145
4146 /*
4147 * We don't support the ATA "security" protocol.
4148 */
4149 if (secp == 0xef) {
4150 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4151 return 1;
4152 }
4153
4154 if (cdb[4] & 7) { /* INC_512 */
4155 if (len > 0xffff) {
4156 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4157 return 1;
4158 }
4159 } else {
4160 if (len > 0x01fffe00) {
4161 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4162 return 1;
4163 }
4164
4165 /* convert to the sector-based ATA addressing */
4166 len = (len + 511) / 512;
4167 }
4168
4169 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4170 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4171 if (send)
4172 tf->flags |= ATA_TFLAG_WRITE;
4173 tf->command = ata_scsi_trusted_op(len, send, dma);
4174 tf->feature = secp;
4175 tf->lbam = spsp & 0xff;
4176 tf->lbah = spsp >> 8;
4177
4178 if (len) {
4179 tf->nsect = len & 0xff;
4180 tf->lbal = len >> 8;
4181 } else {
4182 if (!send)
4183 tf->lbah = (1 << 7);
4184 }
4185
4186 ata_qc_set_pc_nbytes(qc);
4187 return 0;
4188}
4189
4190/**
4191 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4192 * @qc: Command to be translated
4193 *
4194 * Translate a SCSI variable length CDB to specified commands.
4195 * It checks a service action value in CDB to call corresponding handler.
4196 *
4197 * RETURNS:
4198 * Zero on success, non-zero on failure
4199 *
4200 */
4201static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4202{
4203 struct scsi_cmnd *scmd = qc->scsicmd;
4204 const u8 *cdb = scmd->cmnd;
4205 const u16 sa = get_unaligned_be16(&cdb[8]);
4206
4207 /*
4208 * if service action represents a ata pass-thru(32) command,
4209 * then pass it to ata_scsi_pass_thru handler.
4210 */
4211 if (sa == ATA_32)
4212 return ata_scsi_pass_thru(qc);
4213
4214 /* unsupported service action */
4215 return 1;
4216}
4217
4218/**
4219 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4220 * @dev: ATA device
4221 * @cmd: SCSI command opcode to consider
4222 *
4223 * Look up the SCSI command given, and determine whether the
4224 * SCSI command is to be translated or simulated.
4225 *
4226 * RETURNS:
4227 * Pointer to translation function if possible, %NULL if not.
4228 */
4229
4230static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4231{
4232 switch (cmd) {
4233 case READ_6:
4234 case READ_10:
4235 case READ_16:
4236
4237 case WRITE_6:
4238 case WRITE_10:
4239 case WRITE_16:
4240 return ata_scsi_rw_xlat;
4241
4242 case WRITE_SAME_16:
4243 return ata_scsi_write_same_xlat;
4244
4245 case SYNCHRONIZE_CACHE:
4246 if (ata_try_flush_cache(dev))
4247 return ata_scsi_flush_xlat;
4248 break;
4249
4250 case VERIFY:
4251 case VERIFY_16:
4252 return ata_scsi_verify_xlat;
4253
4254 case ATA_12:
4255 case ATA_16:
4256 return ata_scsi_pass_thru;
4257
4258 case VARIABLE_LENGTH_CMD:
4259 return ata_scsi_var_len_cdb_xlat;
4260
4261 case MODE_SELECT:
4262 case MODE_SELECT_10:
4263 return ata_scsi_mode_select_xlat;
4264 break;
4265
4266 case ZBC_IN:
4267 return ata_scsi_zbc_in_xlat;
4268
4269 case ZBC_OUT:
4270 return ata_scsi_zbc_out_xlat;
4271
4272 case SECURITY_PROTOCOL_IN:
4273 case SECURITY_PROTOCOL_OUT:
4274 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4275 break;
4276 return ata_scsi_security_inout_xlat;
4277
4278 case START_STOP:
4279 return ata_scsi_start_stop_xlat;
4280 }
4281
4282 return NULL;
4283}
4284
4285/**
4286 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4287 * @ap: ATA port to which the command was being sent
4288 * @cmd: SCSI command to dump
4289 *
4290 * Prints the contents of a SCSI command via printk().
4291 */
4292
4293static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4294 struct scsi_cmnd *cmd)
4295{
4296#ifdef ATA_VERBOSE_DEBUG
4297 struct scsi_device *scsidev = cmd->device;
4298
4299 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4300 ap->print_id,
4301 scsidev->channel, scsidev->id, scsidev->lun,
4302 cmd->cmnd);
4303#endif
4304}
4305
4306static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4307 struct ata_device *dev)
4308{
4309 u8 scsi_op = scmd->cmnd[0];
4310 ata_xlat_func_t xlat_func;
4311 int rc = 0;
4312
4313 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4314 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4315 goto bad_cdb_len;
4316
4317 xlat_func = ata_get_xlat_func(dev, scsi_op);
4318 } else {
4319 if (unlikely(!scmd->cmd_len))
4320 goto bad_cdb_len;
4321
4322 xlat_func = NULL;
4323 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4324 /* relay SCSI command to ATAPI device */
4325 int len = COMMAND_SIZE(scsi_op);
4326 if (unlikely(len > scmd->cmd_len ||
4327 len > dev->cdb_len ||
4328 scmd->cmd_len > ATAPI_CDB_LEN))
4329 goto bad_cdb_len;
4330
4331 xlat_func = atapi_xlat;
4332 } else {
4333 /* ATA_16 passthru, treat as an ATA command */
4334 if (unlikely(scmd->cmd_len > 16))
4335 goto bad_cdb_len;
4336
4337 xlat_func = ata_get_xlat_func(dev, scsi_op);
4338 }
4339 }
4340
4341 if (xlat_func)
4342 rc = ata_scsi_translate(dev, scmd, xlat_func);
4343 else
4344 ata_scsi_simulate(dev, scmd);
4345
4346 return rc;
4347
4348 bad_cdb_len:
4349 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4350 scmd->cmd_len, scsi_op, dev->cdb_len);
4351 scmd->result = DID_ERROR << 16;
4352 scmd->scsi_done(scmd);
4353 return 0;
4354}
4355
4356/**
4357 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4358 * @shost: SCSI host of command to be sent
4359 * @cmd: SCSI command to be sent
4360 *
4361 * In some cases, this function translates SCSI commands into
4362 * ATA taskfiles, and queues the taskfiles to be sent to
4363 * hardware. In other cases, this function simulates a
4364 * SCSI device by evaluating and responding to certain
4365 * SCSI commands. This creates the overall effect of
4366 * ATA and ATAPI devices appearing as SCSI devices.
4367 *
4368 * LOCKING:
4369 * ATA host lock
4370 *
4371 * RETURNS:
4372 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4373 * 0 otherwise.
4374 */
4375int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4376{
4377 struct ata_port *ap;
4378 struct ata_device *dev;
4379 struct scsi_device *scsidev = cmd->device;
4380 int rc = 0;
4381 unsigned long irq_flags;
4382
4383 ap = ata_shost_to_port(shost);
4384
4385 spin_lock_irqsave(ap->lock, irq_flags);
4386
4387 ata_scsi_dump_cdb(ap, cmd);
4388
4389 dev = ata_scsi_find_dev(ap, scsidev);
4390 if (likely(dev))
4391 rc = __ata_scsi_queuecmd(cmd, dev);
4392 else {
4393 cmd->result = (DID_BAD_TARGET << 16);
4394 cmd->scsi_done(cmd);
4395 }
4396
4397 spin_unlock_irqrestore(ap->lock, irq_flags);
4398
4399 return rc;
4400}
4401
4402/**
4403 * ata_scsi_simulate - simulate SCSI command on ATA device
4404 * @dev: the target device
4405 * @cmd: SCSI command being sent to device.
4406 *
4407 * Interprets and directly executes a select list of SCSI commands
4408 * that can be handled internally.
4409 *
4410 * LOCKING:
4411 * spin_lock_irqsave(host lock)
4412 */
4413
4414void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4415{
4416 struct ata_scsi_args args;
4417 const u8 *scsicmd = cmd->cmnd;
4418 u8 tmp8;
4419
4420 args.dev = dev;
4421 args.id = dev->id;
4422 args.cmd = cmd;
4423
4424 switch(scsicmd[0]) {
4425 case INQUIRY:
4426 if (scsicmd[1] & 2) /* is CmdDt set? */
4427 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4428 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4429 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4430 else switch (scsicmd[2]) {
4431 case 0x00:
4432 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4433 break;
4434 case 0x80:
4435 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4436 break;
4437 case 0x83:
4438 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4439 break;
4440 case 0x89:
4441 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4442 break;
4443 case 0xb0:
4444 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4445 break;
4446 case 0xb1:
4447 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4448 break;
4449 case 0xb2:
4450 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4451 break;
4452 case 0xb6:
4453 if (dev->flags & ATA_DFLAG_ZAC) {
4454 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4455 break;
4456 }
4457 /* Fallthrough */
4458 default:
4459 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4460 break;
4461 }
4462 break;
4463
4464 case MODE_SENSE:
4465 case MODE_SENSE_10:
4466 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4467 break;
4468
4469 case READ_CAPACITY:
4470 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4471 break;
4472
4473 case SERVICE_ACTION_IN_16:
4474 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4475 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4476 else
4477 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4478 break;
4479
4480 case REPORT_LUNS:
4481 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4482 break;
4483
4484 case REQUEST_SENSE:
4485 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4486 cmd->result = (DRIVER_SENSE << 24);
4487 break;
4488
4489 /* if we reach this, then writeback caching is disabled,
4490 * turning this into a no-op.
4491 */
4492 case SYNCHRONIZE_CACHE:
4493 /* fall through */
4494
4495 /* no-op's, complete with success */
4496 case REZERO_UNIT:
4497 case SEEK_6:
4498 case SEEK_10:
4499 case TEST_UNIT_READY:
4500 break;
4501
4502 case SEND_DIAGNOSTIC:
4503 tmp8 = scsicmd[1] & ~(1 << 3);
4504 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4505 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4506 break;
4507
4508 case MAINTENANCE_IN:
4509 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4510 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4511 else
4512 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4513 break;
4514
4515 /* all other commands */
4516 default:
4517 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4518 /* "Invalid command operation code" */
4519 break;
4520 }
4521
4522 cmd->scsi_done(cmd);
4523}
4524
4525int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4526{
4527 int i, rc;
4528
4529 for (i = 0; i < host->n_ports; i++) {
4530 struct ata_port *ap = host->ports[i];
4531 struct Scsi_Host *shost;
4532
4533 rc = -ENOMEM;
4534 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4535 if (!shost)
4536 goto err_alloc;
4537
4538 shost->eh_noresume = 1;
4539 *(struct ata_port **)&shost->hostdata[0] = ap;
4540 ap->scsi_host = shost;
4541
4542 shost->transportt = ata_scsi_transport_template;
4543 shost->unique_id = ap->print_id;
4544 shost->max_id = 16;
4545 shost->max_lun = 1;
4546 shost->max_channel = 1;
4547 shost->max_cmd_len = 32;
4548
4549 /* Schedule policy is determined by ->qc_defer()
4550 * callback and it needs to see every deferred qc.
4551 * Set host_blocked to 1 to prevent SCSI midlayer from
4552 * automatically deferring requests.
4553 */
4554 shost->max_host_blocked = 1;
4555
4556 rc = scsi_add_host_with_dma(ap->scsi_host,
4557 &ap->tdev, ap->host->dev);
4558 if (rc)
4559 goto err_add;
4560 }
4561
4562 return 0;
4563
4564 err_add:
4565 scsi_host_put(host->ports[i]->scsi_host);
4566 err_alloc:
4567 while (--i >= 0) {
4568 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4569
4570 scsi_remove_host(shost);
4571 scsi_host_put(shost);
4572 }
4573 return rc;
4574}
4575
4576void ata_scsi_scan_host(struct ata_port *ap, int sync)
4577{
4578 int tries = 5;
4579 struct ata_device *last_failed_dev = NULL;
4580 struct ata_link *link;
4581 struct ata_device *dev;
4582
4583 repeat:
4584 ata_for_each_link(link, ap, EDGE) {
4585 ata_for_each_dev(dev, link, ENABLED) {
4586 struct scsi_device *sdev;
4587 int channel = 0, id = 0;
4588
4589 if (dev->sdev)
4590 continue;
4591
4592 if (ata_is_host_link(link))
4593 id = dev->devno;
4594 else
4595 channel = link->pmp;
4596
4597 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4598 NULL);
4599 if (!IS_ERR(sdev)) {
4600 dev->sdev = sdev;
4601 scsi_device_put(sdev);
4602 } else {
4603 dev->sdev = NULL;
4604 }
4605 }
4606 }
4607
4608 /* If we scanned while EH was in progress or allocation
4609 * failure occurred, scan would have failed silently. Check
4610 * whether all devices are attached.
4611 */
4612 ata_for_each_link(link, ap, EDGE) {
4613 ata_for_each_dev(dev, link, ENABLED) {
4614 if (!dev->sdev)
4615 goto exit_loop;
4616 }
4617 }
4618 exit_loop:
4619 if (!link)
4620 return;
4621
4622 /* we're missing some SCSI devices */
4623 if (sync) {
4624 /* If caller requested synchrnous scan && we've made
4625 * any progress, sleep briefly and repeat.
4626 */
4627 if (dev != last_failed_dev) {
4628 msleep(100);
4629 last_failed_dev = dev;
4630 goto repeat;
4631 }
4632
4633 /* We might be failing to detect boot device, give it
4634 * a few more chances.
4635 */
4636 if (--tries) {
4637 msleep(100);
4638 goto repeat;
4639 }
4640
4641 ata_port_err(ap,
4642 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4643 }
4644
4645 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4646 round_jiffies_relative(HZ));
4647}
4648
4649/**
4650 * ata_scsi_offline_dev - offline attached SCSI device
4651 * @dev: ATA device to offline attached SCSI device for
4652 *
4653 * This function is called from ata_eh_hotplug() and responsible
4654 * for taking the SCSI device attached to @dev offline. This
4655 * function is called with host lock which protects dev->sdev
4656 * against clearing.
4657 *
4658 * LOCKING:
4659 * spin_lock_irqsave(host lock)
4660 *
4661 * RETURNS:
4662 * 1 if attached SCSI device exists, 0 otherwise.
4663 */
4664int ata_scsi_offline_dev(struct ata_device *dev)
4665{
4666 if (dev->sdev) {
4667 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4668 return 1;
4669 }
4670 return 0;
4671}
4672
4673/**
4674 * ata_scsi_remove_dev - remove attached SCSI device
4675 * @dev: ATA device to remove attached SCSI device for
4676 *
4677 * This function is called from ata_eh_scsi_hotplug() and
4678 * responsible for removing the SCSI device attached to @dev.
4679 *
4680 * LOCKING:
4681 * Kernel thread context (may sleep).
4682 */
4683static void ata_scsi_remove_dev(struct ata_device *dev)
4684{
4685 struct ata_port *ap = dev->link->ap;
4686 struct scsi_device *sdev;
4687 unsigned long flags;
4688
4689 /* Alas, we need to grab scan_mutex to ensure SCSI device
4690 * state doesn't change underneath us and thus
4691 * scsi_device_get() always succeeds. The mutex locking can
4692 * be removed if there is __scsi_device_get() interface which
4693 * increments reference counts regardless of device state.
4694 */
4695 mutex_lock(&ap->scsi_host->scan_mutex);
4696 spin_lock_irqsave(ap->lock, flags);
4697
4698 /* clearing dev->sdev is protected by host lock */
4699 sdev = dev->sdev;
4700 dev->sdev = NULL;
4701
4702 if (sdev) {
4703 /* If user initiated unplug races with us, sdev can go
4704 * away underneath us after the host lock and
4705 * scan_mutex are released. Hold onto it.
4706 */
4707 if (scsi_device_get(sdev) == 0) {
4708 /* The following ensures the attached sdev is
4709 * offline on return from ata_scsi_offline_dev()
4710 * regardless it wins or loses the race
4711 * against this function.
4712 */
4713 scsi_device_set_state(sdev, SDEV_OFFLINE);
4714 } else {
4715 WARN_ON(1);
4716 sdev = NULL;
4717 }
4718 }
4719
4720 spin_unlock_irqrestore(ap->lock, flags);
4721 mutex_unlock(&ap->scsi_host->scan_mutex);
4722
4723 if (sdev) {
4724 ata_dev_info(dev, "detaching (SCSI %s)\n",
4725 dev_name(&sdev->sdev_gendev));
4726
4727 scsi_remove_device(sdev);
4728 scsi_device_put(sdev);
4729 }
4730}
4731
4732static void ata_scsi_handle_link_detach(struct ata_link *link)
4733{
4734 struct ata_port *ap = link->ap;
4735 struct ata_device *dev;
4736
4737 ata_for_each_dev(dev, link, ALL) {
4738 unsigned long flags;
4739
4740 if (!(dev->flags & ATA_DFLAG_DETACHED))
4741 continue;
4742
4743 spin_lock_irqsave(ap->lock, flags);
4744 dev->flags &= ~ATA_DFLAG_DETACHED;
4745 spin_unlock_irqrestore(ap->lock, flags);
4746
4747 if (zpodd_dev_enabled(dev))
4748 zpodd_exit(dev);
4749
4750 ata_scsi_remove_dev(dev);
4751 }
4752}
4753
4754/**
4755 * ata_scsi_media_change_notify - send media change event
4756 * @dev: Pointer to the disk device with media change event
4757 *
4758 * Tell the block layer to send a media change notification
4759 * event.
4760 *
4761 * LOCKING:
4762 * spin_lock_irqsave(host lock)
4763 */
4764void ata_scsi_media_change_notify(struct ata_device *dev)
4765{
4766 if (dev->sdev)
4767 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4768 GFP_ATOMIC);
4769}
4770
4771/**
4772 * ata_scsi_hotplug - SCSI part of hotplug
4773 * @work: Pointer to ATA port to perform SCSI hotplug on
4774 *
4775 * Perform SCSI part of hotplug. It's executed from a separate
4776 * workqueue after EH completes. This is necessary because SCSI
4777 * hot plugging requires working EH and hot unplugging is
4778 * synchronized with hot plugging with a mutex.
4779 *
4780 * LOCKING:
4781 * Kernel thread context (may sleep).
4782 */
4783void ata_scsi_hotplug(struct work_struct *work)
4784{
4785 struct ata_port *ap =
4786 container_of(work, struct ata_port, hotplug_task.work);
4787 int i;
4788
4789 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4790 DPRINTK("ENTER/EXIT - unloading\n");
4791 return;
4792 }
4793
4794 DPRINTK("ENTER\n");
4795 mutex_lock(&ap->scsi_scan_mutex);
4796
4797 /* Unplug detached devices. We cannot use link iterator here
4798 * because PMP links have to be scanned even if PMP is
4799 * currently not attached. Iterate manually.
4800 */
4801 ata_scsi_handle_link_detach(&ap->link);
4802 if (ap->pmp_link)
4803 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4804 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4805
4806 /* scan for new ones */
4807 ata_scsi_scan_host(ap, 0);
4808
4809 mutex_unlock(&ap->scsi_scan_mutex);
4810 DPRINTK("EXIT\n");
4811}
4812
4813/**
4814 * ata_scsi_user_scan - indication for user-initiated bus scan
4815 * @shost: SCSI host to scan
4816 * @channel: Channel to scan
4817 * @id: ID to scan
4818 * @lun: LUN to scan
4819 *
4820 * This function is called when user explicitly requests bus
4821 * scan. Set probe pending flag and invoke EH.
4822 *
4823 * LOCKING:
4824 * SCSI layer (we don't care)
4825 *
4826 * RETURNS:
4827 * Zero.
4828 */
4829int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4830 unsigned int id, u64 lun)
4831{
4832 struct ata_port *ap = ata_shost_to_port(shost);
4833 unsigned long flags;
4834 int devno, rc = 0;
4835
4836 if (!ap->ops->error_handler)
4837 return -EOPNOTSUPP;
4838
4839 if (lun != SCAN_WILD_CARD && lun)
4840 return -EINVAL;
4841
4842 if (!sata_pmp_attached(ap)) {
4843 if (channel != SCAN_WILD_CARD && channel)
4844 return -EINVAL;
4845 devno = id;
4846 } else {
4847 if (id != SCAN_WILD_CARD && id)
4848 return -EINVAL;
4849 devno = channel;
4850 }
4851
4852 spin_lock_irqsave(ap->lock, flags);
4853
4854 if (devno == SCAN_WILD_CARD) {
4855 struct ata_link *link;
4856
4857 ata_for_each_link(link, ap, EDGE) {
4858 struct ata_eh_info *ehi = &link->eh_info;
4859 ehi->probe_mask |= ATA_ALL_DEVICES;
4860 ehi->action |= ATA_EH_RESET;
4861 }
4862 } else {
4863 struct ata_device *dev = ata_find_dev(ap, devno);
4864
4865 if (dev) {
4866 struct ata_eh_info *ehi = &dev->link->eh_info;
4867 ehi->probe_mask |= 1 << dev->devno;
4868 ehi->action |= ATA_EH_RESET;
4869 } else
4870 rc = -EINVAL;
4871 }
4872
4873 if (rc == 0) {
4874 ata_port_schedule_eh(ap);
4875 spin_unlock_irqrestore(ap->lock, flags);
4876 ata_port_wait_eh(ap);
4877 } else
4878 spin_unlock_irqrestore(ap->lock, flags);
4879
4880 return rc;
4881}
4882
4883/**
4884 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4885 * @work: Pointer to ATA port to perform scsi_rescan_device()
4886 *
4887 * After ATA pass thru (SAT) commands are executed successfully,
4888 * libata need to propagate the changes to SCSI layer.
4889 *
4890 * LOCKING:
4891 * Kernel thread context (may sleep).
4892 */
4893void ata_scsi_dev_rescan(struct work_struct *work)
4894{
4895 struct ata_port *ap =
4896 container_of(work, struct ata_port, scsi_rescan_task);
4897 struct ata_link *link;
4898 struct ata_device *dev;
4899 unsigned long flags;
4900
4901 mutex_lock(&ap->scsi_scan_mutex);
4902 spin_lock_irqsave(ap->lock, flags);
4903
4904 ata_for_each_link(link, ap, EDGE) {
4905 ata_for_each_dev(dev, link, ENABLED) {
4906 struct scsi_device *sdev = dev->sdev;
4907
4908 if (!sdev)
4909 continue;
4910 if (scsi_device_get(sdev))
4911 continue;
4912
4913 spin_unlock_irqrestore(ap->lock, flags);
4914 scsi_rescan_device(&(sdev->sdev_gendev));
4915 scsi_device_put(sdev);
4916 spin_lock_irqsave(ap->lock, flags);
4917 }
4918 }
4919
4920 spin_unlock_irqrestore(ap->lock, flags);
4921 mutex_unlock(&ap->scsi_scan_mutex);
4922}
4923
4924/**
4925 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4926 * @host: ATA host container for all SAS ports
4927 * @port_info: Information from low-level host driver
4928 * @shost: SCSI host that the scsi device is attached to
4929 *
4930 * LOCKING:
4931 * PCI/etc. bus probe sem.
4932 *
4933 * RETURNS:
4934 * ata_port pointer on success / NULL on failure.
4935 */
4936
4937struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4938 struct ata_port_info *port_info,
4939 struct Scsi_Host *shost)
4940{
4941 struct ata_port *ap;
4942
4943 ap = ata_port_alloc(host);
4944 if (!ap)
4945 return NULL;
4946
4947 ap->port_no = 0;
4948 ap->lock = &host->lock;
4949 ap->pio_mask = port_info->pio_mask;
4950 ap->mwdma_mask = port_info->mwdma_mask;
4951 ap->udma_mask = port_info->udma_mask;
4952 ap->flags |= port_info->flags;
4953 ap->ops = port_info->port_ops;
4954 ap->cbl = ATA_CBL_SATA;
4955
4956 return ap;
4957}
4958EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4959
4960/**
4961 * ata_sas_port_start - Set port up for dma.
4962 * @ap: Port to initialize
4963 *
4964 * Called just after data structures for each port are
4965 * initialized.
4966 *
4967 * May be used as the port_start() entry in ata_port_operations.
4968 *
4969 * LOCKING:
4970 * Inherited from caller.
4971 */
4972int ata_sas_port_start(struct ata_port *ap)
4973{
4974 /*
4975 * the port is marked as frozen at allocation time, but if we don't
4976 * have new eh, we won't thaw it
4977 */
4978 if (!ap->ops->error_handler)
4979 ap->pflags &= ~ATA_PFLAG_FROZEN;
4980 return 0;
4981}
4982EXPORT_SYMBOL_GPL(ata_sas_port_start);
4983
4984/**
4985 * ata_port_stop - Undo ata_sas_port_start()
4986 * @ap: Port to shut down
4987 *
4988 * May be used as the port_stop() entry in ata_port_operations.
4989 *
4990 * LOCKING:
4991 * Inherited from caller.
4992 */
4993
4994void ata_sas_port_stop(struct ata_port *ap)
4995{
4996}
4997EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4998
4999/**
5000 * ata_sas_async_probe - simply schedule probing and return
5001 * @ap: Port to probe
5002 *
5003 * For batch scheduling of probe for sas attached ata devices, assumes
5004 * the port has already been through ata_sas_port_init()
5005 */
5006void ata_sas_async_probe(struct ata_port *ap)
5007{
5008 __ata_port_probe(ap);
5009}
5010EXPORT_SYMBOL_GPL(ata_sas_async_probe);
5011
5012int ata_sas_sync_probe(struct ata_port *ap)
5013{
5014 return ata_port_probe(ap);
5015}
5016EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
5017
5018
5019/**
5020 * ata_sas_port_init - Initialize a SATA device
5021 * @ap: SATA port to initialize
5022 *
5023 * LOCKING:
5024 * PCI/etc. bus probe sem.
5025 *
5026 * RETURNS:
5027 * Zero on success, non-zero on error.
5028 */
5029
5030int ata_sas_port_init(struct ata_port *ap)
5031{
5032 int rc = ap->ops->port_start(ap);
5033
5034 if (rc)
5035 return rc;
5036 ap->print_id = atomic_inc_return(&ata_print_id);
5037 return 0;
5038}
5039EXPORT_SYMBOL_GPL(ata_sas_port_init);
5040
5041int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
5042{
5043 return ata_tport_add(parent, ap);
5044}
5045EXPORT_SYMBOL_GPL(ata_sas_tport_add);
5046
5047void ata_sas_tport_delete(struct ata_port *ap)
5048{
5049 ata_tport_delete(ap);
5050}
5051EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
5052
5053/**
5054 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5055 * @ap: SATA port to destroy
5056 *
5057 */
5058
5059void ata_sas_port_destroy(struct ata_port *ap)
5060{
5061 if (ap->ops->port_stop)
5062 ap->ops->port_stop(ap);
5063 kfree(ap);
5064}
5065EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5066
5067/**
5068 * ata_sas_slave_configure - Default slave_config routine for libata devices
5069 * @sdev: SCSI device to configure
5070 * @ap: ATA port to which SCSI device is attached
5071 *
5072 * RETURNS:
5073 * Zero.
5074 */
5075
5076int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5077{
5078 ata_scsi_sdev_config(sdev);
5079 ata_scsi_dev_config(sdev, ap->link.device);
5080 return 0;
5081}
5082EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5083
5084/**
5085 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5086 * @cmd: SCSI command to be sent
5087 * @ap: ATA port to which the command is being sent
5088 *
5089 * RETURNS:
5090 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5091 * 0 otherwise.
5092 */
5093
5094int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5095{
5096 int rc = 0;
5097
5098 ata_scsi_dump_cdb(ap, cmd);
5099
5100 if (likely(ata_dev_enabled(ap->link.device)))
5101 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5102 else {
5103 cmd->result = (DID_BAD_TARGET << 16);
5104 cmd->scsi_done(cmd);
5105 }
5106 return rc;
5107}
5108EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5109
5110int ata_sas_allocate_tag(struct ata_port *ap)
5111{
5112 unsigned int max_queue = ap->host->n_tags;
5113 unsigned int i, tag;
5114
5115 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5116 tag = tag < max_queue ? tag : 0;
5117
5118 /* the last tag is reserved for internal command. */
5119 if (ata_tag_internal(tag))
5120 continue;
5121
5122 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5123 ap->sas_last_tag = tag;
5124 return tag;
5125 }
5126 }
5127 return -1;
5128}
5129
5130void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5131{
5132 clear_bit(tag, &ap->sas_tag_allocated);
5133}
1/*
2 * libata-scsi.c - helper library for ATA
3 *
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/driver-api/libata.rst
29 *
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
33 *
34 */
35
36#include <linux/slab.h>
37#include <linux/kernel.h>
38#include <linux/blkdev.h>
39#include <linux/spinlock.h>
40#include <linux/export.h>
41#include <scsi/scsi.h>
42#include <scsi/scsi_host.h>
43#include <scsi/scsi_cmnd.h>
44#include <scsi/scsi_eh.h>
45#include <scsi/scsi_device.h>
46#include <scsi/scsi_tcq.h>
47#include <scsi/scsi_transport.h>
48#include <linux/libata.h>
49#include <linux/hdreg.h>
50#include <linux/uaccess.h>
51#include <linux/suspend.h>
52#include <asm/unaligned.h>
53#include <linux/ioprio.h>
54
55#include "libata.h"
56#include "libata-transport.h"
57
58#define ATA_SCSI_RBUF_SIZE 4096
59
60static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
61static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62
63typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64
65static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
66 const struct scsi_device *scsidev);
67static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
68 const struct scsi_device *scsidev);
69
70#define RW_RECOVERY_MPAGE 0x1
71#define RW_RECOVERY_MPAGE_LEN 12
72#define CACHE_MPAGE 0x8
73#define CACHE_MPAGE_LEN 20
74#define CONTROL_MPAGE 0xa
75#define CONTROL_MPAGE_LEN 12
76#define ALL_MPAGES 0x3f
77#define ALL_SUB_MPAGES 0xff
78
79
80static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE,
82 RW_RECOVERY_MPAGE_LEN - 2,
83 (1 << 7), /* AWRE */
84 0, /* read retry count */
85 0, 0, 0, 0,
86 0, /* write retry count */
87 0, 0, 0
88};
89
90static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 CACHE_MPAGE,
92 CACHE_MPAGE_LEN - 2,
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
96 0, 0, 0, 0, 0, 0, 0
97};
98
99static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE,
101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
106};
107
108static const char *ata_lpm_policy_names[] = {
109 [ATA_LPM_UNKNOWN] = "max_performance",
110 [ATA_LPM_MAX_POWER] = "max_performance",
111 [ATA_LPM_MED_POWER] = "medium_power",
112 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
113 [ATA_LPM_MIN_POWER] = "min_power",
114};
115
116static ssize_t ata_scsi_lpm_store(struct device *device,
117 struct device_attribute *attr,
118 const char *buf, size_t count)
119{
120 struct Scsi_Host *shost = class_to_shost(device);
121 struct ata_port *ap = ata_shost_to_port(shost);
122 struct ata_link *link;
123 struct ata_device *dev;
124 enum ata_lpm_policy policy;
125 unsigned long flags;
126
127 /* UNKNOWN is internal state, iterate from MAX_POWER */
128 for (policy = ATA_LPM_MAX_POWER;
129 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
130 const char *name = ata_lpm_policy_names[policy];
131
132 if (strncmp(name, buf, strlen(name)) == 0)
133 break;
134 }
135 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 return -EINVAL;
137
138 spin_lock_irqsave(ap->lock, flags);
139
140 ata_for_each_link(link, ap, EDGE) {
141 ata_for_each_dev(dev, &ap->link, ENABLED) {
142 if (dev->horkage & ATA_HORKAGE_NOLPM) {
143 count = -EOPNOTSUPP;
144 goto out_unlock;
145 }
146 }
147 }
148
149 ap->target_lpm_policy = policy;
150 ata_port_schedule_eh(ap);
151out_unlock:
152 spin_unlock_irqrestore(ap->lock, flags);
153 return count;
154}
155
156static ssize_t ata_scsi_lpm_show(struct device *dev,
157 struct device_attribute *attr, char *buf)
158{
159 struct Scsi_Host *shost = class_to_shost(dev);
160 struct ata_port *ap = ata_shost_to_port(shost);
161
162 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return -EINVAL;
164
165 return snprintf(buf, PAGE_SIZE, "%s\n",
166 ata_lpm_policy_names[ap->target_lpm_policy]);
167}
168DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
169 ata_scsi_lpm_show, ata_scsi_lpm_store);
170EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
171
172static ssize_t ata_scsi_park_show(struct device *device,
173 struct device_attribute *attr, char *buf)
174{
175 struct scsi_device *sdev = to_scsi_device(device);
176 struct ata_port *ap;
177 struct ata_link *link;
178 struct ata_device *dev;
179 unsigned long now;
180 unsigned int uninitialized_var(msecs);
181 int rc = 0;
182
183 ap = ata_shost_to_port(sdev->host);
184
185 spin_lock_irq(ap->lock);
186 dev = ata_scsi_find_dev(ap, sdev);
187 if (!dev) {
188 rc = -ENODEV;
189 goto unlock;
190 }
191 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
192 rc = -EOPNOTSUPP;
193 goto unlock;
194 }
195
196 link = dev->link;
197 now = jiffies;
198 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
199 link->eh_context.unloaded_mask & (1 << dev->devno) &&
200 time_after(dev->unpark_deadline, now))
201 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
202 else
203 msecs = 0;
204
205unlock:
206 spin_unlock_irq(ap->lock);
207
208 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209}
210
211static ssize_t ata_scsi_park_store(struct device *device,
212 struct device_attribute *attr,
213 const char *buf, size_t len)
214{
215 struct scsi_device *sdev = to_scsi_device(device);
216 struct ata_port *ap;
217 struct ata_device *dev;
218 long int input;
219 unsigned long flags;
220 int rc;
221
222 rc = kstrtol(buf, 10, &input);
223 if (rc)
224 return rc;
225 if (input < -2)
226 return -EINVAL;
227 if (input > ATA_TMOUT_MAX_PARK) {
228 rc = -EOVERFLOW;
229 input = ATA_TMOUT_MAX_PARK;
230 }
231
232 ap = ata_shost_to_port(sdev->host);
233
234 spin_lock_irqsave(ap->lock, flags);
235 dev = ata_scsi_find_dev(ap, sdev);
236 if (unlikely(!dev)) {
237 rc = -ENODEV;
238 goto unlock;
239 }
240 if (dev->class != ATA_DEV_ATA &&
241 dev->class != ATA_DEV_ZAC) {
242 rc = -EOPNOTSUPP;
243 goto unlock;
244 }
245
246 if (input >= 0) {
247 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
248 rc = -EOPNOTSUPP;
249 goto unlock;
250 }
251
252 dev->unpark_deadline = ata_deadline(jiffies, input);
253 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
254 ata_port_schedule_eh(ap);
255 complete(&ap->park_req_pending);
256 } else {
257 switch (input) {
258 case -1:
259 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
260 break;
261 case -2:
262 dev->flags |= ATA_DFLAG_NO_UNLOAD;
263 break;
264 }
265 }
266unlock:
267 spin_unlock_irqrestore(ap->lock, flags);
268
269 return rc ? rc : len;
270}
271DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
272 ata_scsi_park_show, ata_scsi_park_store);
273EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
274
275static ssize_t ata_ncq_prio_enable_show(struct device *device,
276 struct device_attribute *attr,
277 char *buf)
278{
279 struct scsi_device *sdev = to_scsi_device(device);
280 struct ata_port *ap;
281 struct ata_device *dev;
282 bool ncq_prio_enable;
283 int rc = 0;
284
285 ap = ata_shost_to_port(sdev->host);
286
287 spin_lock_irq(ap->lock);
288 dev = ata_scsi_find_dev(ap, sdev);
289 if (!dev) {
290 rc = -ENODEV;
291 goto unlock;
292 }
293
294 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
295
296unlock:
297 spin_unlock_irq(ap->lock);
298
299 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
300}
301
302static ssize_t ata_ncq_prio_enable_store(struct device *device,
303 struct device_attribute *attr,
304 const char *buf, size_t len)
305{
306 struct scsi_device *sdev = to_scsi_device(device);
307 struct ata_port *ap;
308 struct ata_device *dev;
309 long int input;
310 int rc;
311
312 rc = kstrtol(buf, 10, &input);
313 if (rc)
314 return rc;
315 if ((input < 0) || (input > 1))
316 return -EINVAL;
317
318 ap = ata_shost_to_port(sdev->host);
319 dev = ata_scsi_find_dev(ap, sdev);
320 if (unlikely(!dev))
321 return -ENODEV;
322
323 spin_lock_irq(ap->lock);
324 if (input)
325 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
326 else
327 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
328
329 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
330 dev->link->eh_info.flags |= ATA_EHI_QUIET;
331 ata_port_schedule_eh(ap);
332 spin_unlock_irq(ap->lock);
333
334 ata_port_wait_eh(ap);
335
336 if (input) {
337 spin_lock_irq(ap->lock);
338 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
339 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
340 rc = -EIO;
341 }
342 spin_unlock_irq(ap->lock);
343 }
344
345 return rc ? rc : len;
346}
347
348DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
349 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
350EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
351
352void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
353 u8 sk, u8 asc, u8 ascq)
354{
355 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
356
357 if (!cmd)
358 return;
359
360 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
361
362 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
363}
364
365void ata_scsi_set_sense_information(struct ata_device *dev,
366 struct scsi_cmnd *cmd,
367 const struct ata_taskfile *tf)
368{
369 u64 information;
370
371 if (!cmd)
372 return;
373
374 information = ata_tf_read_block(tf, dev);
375 if (information == U64_MAX)
376 return;
377
378 scsi_set_sense_information(cmd->sense_buffer,
379 SCSI_SENSE_BUFFERSIZE, information);
380}
381
382static void ata_scsi_set_invalid_field(struct ata_device *dev,
383 struct scsi_cmnd *cmd, u16 field, u8 bit)
384{
385 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
386 /* "Invalid field in CDB" */
387 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
388 field, bit, 1);
389}
390
391static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
392 struct scsi_cmnd *cmd, u16 field)
393{
394 /* "Invalid field in parameter list" */
395 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
396 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
397 field, 0xff, 0);
398}
399
400static ssize_t
401ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
402 const char *buf, size_t count)
403{
404 struct Scsi_Host *shost = class_to_shost(dev);
405 struct ata_port *ap = ata_shost_to_port(shost);
406 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
407 return ap->ops->em_store(ap, buf, count);
408 return -EINVAL;
409}
410
411static ssize_t
412ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
413 char *buf)
414{
415 struct Scsi_Host *shost = class_to_shost(dev);
416 struct ata_port *ap = ata_shost_to_port(shost);
417
418 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
419 return ap->ops->em_show(ap, buf);
420 return -EINVAL;
421}
422DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
423 ata_scsi_em_message_show, ata_scsi_em_message_store);
424EXPORT_SYMBOL_GPL(dev_attr_em_message);
425
426static ssize_t
427ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
428 char *buf)
429{
430 struct Scsi_Host *shost = class_to_shost(dev);
431 struct ata_port *ap = ata_shost_to_port(shost);
432
433 return snprintf(buf, 23, "%d\n", ap->em_message_type);
434}
435DEVICE_ATTR(em_message_type, S_IRUGO,
436 ata_scsi_em_message_type_show, NULL);
437EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
438
439static ssize_t
440ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
441 char *buf)
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
447 if (atadev && ap->ops->sw_activity_show &&
448 (ap->flags & ATA_FLAG_SW_ACTIVITY))
449 return ap->ops->sw_activity_show(atadev, buf);
450 return -EINVAL;
451}
452
453static ssize_t
454ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
455 const char *buf, size_t count)
456{
457 struct scsi_device *sdev = to_scsi_device(dev);
458 struct ata_port *ap = ata_shost_to_port(sdev->host);
459 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
460 enum sw_activity val;
461 int rc;
462
463 if (atadev && ap->ops->sw_activity_store &&
464 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
465 val = simple_strtoul(buf, NULL, 0);
466 switch (val) {
467 case OFF: case BLINK_ON: case BLINK_OFF:
468 rc = ap->ops->sw_activity_store(atadev, val);
469 if (!rc)
470 return count;
471 else
472 return rc;
473 }
474 }
475 return -EINVAL;
476}
477DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
478 ata_scsi_activity_store);
479EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
480
481struct device_attribute *ata_common_sdev_attrs[] = {
482 &dev_attr_unload_heads,
483 &dev_attr_ncq_prio_enable,
484 NULL
485};
486EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
487
488/**
489 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
490 * @sdev: SCSI device for which BIOS geometry is to be determined
491 * @bdev: block device associated with @sdev
492 * @capacity: capacity of SCSI device
493 * @geom: location to which geometry will be output
494 *
495 * Generic bios head/sector/cylinder calculator
496 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
497 * mapping. Some situations may arise where the disk is not
498 * bootable if this is not used.
499 *
500 * LOCKING:
501 * Defined by the SCSI layer. We don't really care.
502 *
503 * RETURNS:
504 * Zero.
505 */
506int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
507 sector_t capacity, int geom[])
508{
509 geom[0] = 255;
510 geom[1] = 63;
511 sector_div(capacity, 255*63);
512 geom[2] = capacity;
513
514 return 0;
515}
516
517/**
518 * ata_scsi_unlock_native_capacity - unlock native capacity
519 * @sdev: SCSI device to adjust device capacity for
520 *
521 * This function is called if a partition on @sdev extends beyond
522 * the end of the device. It requests EH to unlock HPA.
523 *
524 * LOCKING:
525 * Defined by the SCSI layer. Might sleep.
526 */
527void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
528{
529 struct ata_port *ap = ata_shost_to_port(sdev->host);
530 struct ata_device *dev;
531 unsigned long flags;
532
533 spin_lock_irqsave(ap->lock, flags);
534
535 dev = ata_scsi_find_dev(ap, sdev);
536 if (dev && dev->n_sectors < dev->n_native_sectors) {
537 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
538 dev->link->eh_info.action |= ATA_EH_RESET;
539 ata_port_schedule_eh(ap);
540 }
541
542 spin_unlock_irqrestore(ap->lock, flags);
543 ata_port_wait_eh(ap);
544}
545
546/**
547 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
548 * @ap: target port
549 * @sdev: SCSI device to get identify data for
550 * @arg: User buffer area for identify data
551 *
552 * LOCKING:
553 * Defined by the SCSI layer. We don't really care.
554 *
555 * RETURNS:
556 * Zero on success, negative errno on error.
557 */
558static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
559 void __user *arg)
560{
561 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
562 u16 __user *dst = arg;
563 char buf[40];
564
565 if (!dev)
566 return -ENOMSG;
567
568 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
569 return -EFAULT;
570
571 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
572 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
573 return -EFAULT;
574
575 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
576 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
577 return -EFAULT;
578
579 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
580 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
581 return -EFAULT;
582
583 return 0;
584}
585
586/**
587 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
588 * @scsidev: Device to which we are issuing command
589 * @arg: User provided data for issuing command
590 *
591 * LOCKING:
592 * Defined by the SCSI layer. We don't really care.
593 *
594 * RETURNS:
595 * Zero on success, negative errno on error.
596 */
597int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
598{
599 int rc = 0;
600 u8 scsi_cmd[MAX_COMMAND_SIZE];
601 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
602 int argsize = 0;
603 enum dma_data_direction data_dir;
604 struct scsi_sense_hdr sshdr;
605 int cmd_result;
606
607 if (arg == NULL)
608 return -EINVAL;
609
610 if (copy_from_user(args, arg, sizeof(args)))
611 return -EFAULT;
612
613 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
614 if (!sensebuf)
615 return -ENOMEM;
616
617 memset(scsi_cmd, 0, sizeof(scsi_cmd));
618
619 if (args[3]) {
620 argsize = ATA_SECT_SIZE * args[3];
621 argbuf = kmalloc(argsize, GFP_KERNEL);
622 if (argbuf == NULL) {
623 rc = -ENOMEM;
624 goto error;
625 }
626
627 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
628 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
629 block count in sector count field */
630 data_dir = DMA_FROM_DEVICE;
631 } else {
632 scsi_cmd[1] = (3 << 1); /* Non-data */
633 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
634 data_dir = DMA_NONE;
635 }
636
637 scsi_cmd[0] = ATA_16;
638
639 scsi_cmd[4] = args[2];
640 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
641 scsi_cmd[6] = args[3];
642 scsi_cmd[8] = args[1];
643 scsi_cmd[10] = 0x4f;
644 scsi_cmd[12] = 0xc2;
645 } else {
646 scsi_cmd[6] = args[1];
647 }
648 scsi_cmd[14] = args[0];
649
650 /* Good values for timeout and retries? Values below
651 from scsi_ioctl_send_command() for default case... */
652 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
653 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
654
655 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
656 u8 *desc = sensebuf + 8;
657 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
658
659 /* If we set cc then ATA pass-through will cause a
660 * check condition even if no error. Filter that. */
661 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
662 if (sshdr.sense_key == RECOVERED_ERROR &&
663 sshdr.asc == 0 && sshdr.ascq == 0x1d)
664 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
665 }
666
667 /* Send userspace a few ATA registers (same as drivers/ide) */
668 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
669 desc[0] == 0x09) { /* code is "ATA Descriptor" */
670 args[0] = desc[13]; /* status */
671 args[1] = desc[3]; /* error */
672 args[2] = desc[5]; /* sector count (0:7) */
673 if (copy_to_user(arg, args, sizeof(args)))
674 rc = -EFAULT;
675 }
676 }
677
678
679 if (cmd_result) {
680 rc = -EIO;
681 goto error;
682 }
683
684 if ((argbuf)
685 && copy_to_user(arg + sizeof(args), argbuf, argsize))
686 rc = -EFAULT;
687error:
688 kfree(sensebuf);
689 kfree(argbuf);
690 return rc;
691}
692
693/**
694 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
695 * @scsidev: Device to which we are issuing command
696 * @arg: User provided data for issuing command
697 *
698 * LOCKING:
699 * Defined by the SCSI layer. We don't really care.
700 *
701 * RETURNS:
702 * Zero on success, negative errno on error.
703 */
704int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
705{
706 int rc = 0;
707 u8 scsi_cmd[MAX_COMMAND_SIZE];
708 u8 args[7], *sensebuf = NULL;
709 struct scsi_sense_hdr sshdr;
710 int cmd_result;
711
712 if (arg == NULL)
713 return -EINVAL;
714
715 if (copy_from_user(args, arg, sizeof(args)))
716 return -EFAULT;
717
718 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
719 if (!sensebuf)
720 return -ENOMEM;
721
722 memset(scsi_cmd, 0, sizeof(scsi_cmd));
723 scsi_cmd[0] = ATA_16;
724 scsi_cmd[1] = (3 << 1); /* Non-data */
725 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
726 scsi_cmd[4] = args[1];
727 scsi_cmd[6] = args[2];
728 scsi_cmd[8] = args[3];
729 scsi_cmd[10] = args[4];
730 scsi_cmd[12] = args[5];
731 scsi_cmd[13] = args[6] & 0x4f;
732 scsi_cmd[14] = args[0];
733
734 /* Good values for timeout and retries? Values below
735 from scsi_ioctl_send_command() for default case... */
736 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
737 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
738
739 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
740 u8 *desc = sensebuf + 8;
741 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
742
743 /* If we set cc then ATA pass-through will cause a
744 * check condition even if no error. Filter that. */
745 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
746 if (sshdr.sense_key == RECOVERED_ERROR &&
747 sshdr.asc == 0 && sshdr.ascq == 0x1d)
748 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
749 }
750
751 /* Send userspace ATA registers */
752 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
753 desc[0] == 0x09) {/* code is "ATA Descriptor" */
754 args[0] = desc[13]; /* status */
755 args[1] = desc[3]; /* error */
756 args[2] = desc[5]; /* sector count (0:7) */
757 args[3] = desc[7]; /* lbal */
758 args[4] = desc[9]; /* lbam */
759 args[5] = desc[11]; /* lbah */
760 args[6] = desc[12]; /* select */
761 if (copy_to_user(arg, args, sizeof(args)))
762 rc = -EFAULT;
763 }
764 }
765
766 if (cmd_result) {
767 rc = -EIO;
768 goto error;
769 }
770
771 error:
772 kfree(sensebuf);
773 return rc;
774}
775
776static int ata_ioc32(struct ata_port *ap)
777{
778 if (ap->flags & ATA_FLAG_PIO_DMA)
779 return 1;
780 if (ap->pflags & ATA_PFLAG_PIO32)
781 return 1;
782 return 0;
783}
784
785int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
786 int cmd, void __user *arg)
787{
788 unsigned long val;
789 int rc = -EINVAL;
790 unsigned long flags;
791
792 switch (cmd) {
793 case HDIO_GET_32BIT:
794 spin_lock_irqsave(ap->lock, flags);
795 val = ata_ioc32(ap);
796 spin_unlock_irqrestore(ap->lock, flags);
797 return put_user(val, (unsigned long __user *)arg);
798
799 case HDIO_SET_32BIT:
800 val = (unsigned long) arg;
801 rc = 0;
802 spin_lock_irqsave(ap->lock, flags);
803 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
804 if (val)
805 ap->pflags |= ATA_PFLAG_PIO32;
806 else
807 ap->pflags &= ~ATA_PFLAG_PIO32;
808 } else {
809 if (val != ata_ioc32(ap))
810 rc = -EINVAL;
811 }
812 spin_unlock_irqrestore(ap->lock, flags);
813 return rc;
814
815 case HDIO_GET_IDENTITY:
816 return ata_get_identity(ap, scsidev, arg);
817
818 case HDIO_DRIVE_CMD:
819 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
820 return -EACCES;
821 return ata_cmd_ioctl(scsidev, arg);
822
823 case HDIO_DRIVE_TASK:
824 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
825 return -EACCES;
826 return ata_task_ioctl(scsidev, arg);
827
828 default:
829 rc = -ENOTTY;
830 break;
831 }
832
833 return rc;
834}
835EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
836
837int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
838{
839 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
840 scsidev, cmd, arg);
841}
842EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
843
844/**
845 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
846 * @dev: ATA device to which the new command is attached
847 * @cmd: SCSI command that originated this ATA command
848 *
849 * Obtain a reference to an unused ata_queued_cmd structure,
850 * which is the basic libata structure representing a single
851 * ATA command sent to the hardware.
852 *
853 * If a command was available, fill in the SCSI-specific
854 * portions of the structure with information on the
855 * current command.
856 *
857 * LOCKING:
858 * spin_lock_irqsave(host lock)
859 *
860 * RETURNS:
861 * Command allocated, or %NULL if none available.
862 */
863static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
864 struct scsi_cmnd *cmd)
865{
866 struct ata_queued_cmd *qc;
867
868 qc = ata_qc_new_init(dev, cmd->request->tag);
869 if (qc) {
870 qc->scsicmd = cmd;
871 qc->scsidone = cmd->scsi_done;
872
873 qc->sg = scsi_sglist(cmd);
874 qc->n_elem = scsi_sg_count(cmd);
875 } else {
876 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
877 cmd->scsi_done(cmd);
878 }
879
880 return qc;
881}
882
883static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
884{
885 struct scsi_cmnd *scmd = qc->scsicmd;
886
887 qc->extrabytes = scmd->request->extra_len;
888 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
889}
890
891/**
892 * ata_dump_status - user friendly display of error info
893 * @id: id of the port in question
894 * @tf: ptr to filled out taskfile
895 *
896 * Decode and dump the ATA error/status registers for the user so
897 * that they have some idea what really happened at the non
898 * make-believe layer.
899 *
900 * LOCKING:
901 * inherited from caller
902 */
903static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
904{
905 u8 stat = tf->command, err = tf->feature;
906
907 pr_warn("ata%u: status=0x%02x { ", id, stat);
908 if (stat & ATA_BUSY) {
909 pr_cont("Busy }\n"); /* Data is not valid in this case */
910 } else {
911 if (stat & ATA_DRDY) pr_cont("DriveReady ");
912 if (stat & ATA_DF) pr_cont("DeviceFault ");
913 if (stat & ATA_DSC) pr_cont("SeekComplete ");
914 if (stat & ATA_DRQ) pr_cont("DataRequest ");
915 if (stat & ATA_CORR) pr_cont("CorrectedError ");
916 if (stat & ATA_SENSE) pr_cont("Sense ");
917 if (stat & ATA_ERR) pr_cont("Error ");
918 pr_cont("}\n");
919
920 if (err) {
921 pr_warn("ata%u: error=0x%02x { ", id, err);
922 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
923 if (err & ATA_ICRC) {
924 if (err & ATA_ABORTED)
925 pr_cont("BadCRC ");
926 else pr_cont("Sector ");
927 }
928 if (err & ATA_UNC) pr_cont("UncorrectableError ");
929 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
930 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
931 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
932 pr_cont("}\n");
933 }
934 }
935}
936
937/**
938 * ata_to_sense_error - convert ATA error to SCSI error
939 * @id: ATA device number
940 * @drv_stat: value contained in ATA status register
941 * @drv_err: value contained in ATA error register
942 * @sk: the sense key we'll fill out
943 * @asc: the additional sense code we'll fill out
944 * @ascq: the additional sense code qualifier we'll fill out
945 * @verbose: be verbose
946 *
947 * Converts an ATA error into a SCSI error. Fill out pointers to
948 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
949 * format sense blocks.
950 *
951 * LOCKING:
952 * spin_lock_irqsave(host lock)
953 */
954static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
955 u8 *asc, u8 *ascq, int verbose)
956{
957 int i;
958
959 /* Based on the 3ware driver translation table */
960 static const unsigned char sense_table[][4] = {
961 /* BBD|ECC|ID|MAR */
962 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
963 // Device busy Aborted command
964 /* BBD|ECC|ID */
965 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
966 // Device busy Aborted command
967 /* ECC|MC|MARK */
968 {0x61, HARDWARE_ERROR, 0x00, 0x00},
969 // Device fault Hardware error
970 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
971 {0x84, ABORTED_COMMAND, 0x47, 0x00},
972 // Data CRC error SCSI parity error
973 /* MC|ID|ABRT|TRK0|MARK */
974 {0x37, NOT_READY, 0x04, 0x00},
975 // Unit offline Not ready
976 /* MCR|MARK */
977 {0x09, NOT_READY, 0x04, 0x00},
978 // Unrecovered disk error Not ready
979 /* Bad address mark */
980 {0x01, MEDIUM_ERROR, 0x13, 0x00},
981 // Address mark not found for data field
982 /* TRK0 - Track 0 not found */
983 {0x02, HARDWARE_ERROR, 0x00, 0x00},
984 // Hardware error
985 /* Abort: 0x04 is not translated here, see below */
986 /* Media change request */
987 {0x08, NOT_READY, 0x04, 0x00},
988 // FIXME: faking offline
989 /* SRV/IDNF - ID not found */
990 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
991 // Logical address out of range
992 /* MC - Media Changed */
993 {0x20, UNIT_ATTENTION, 0x28, 0x00},
994 // Not ready to ready change, medium may have changed
995 /* ECC - Uncorrectable ECC error */
996 {0x40, MEDIUM_ERROR, 0x11, 0x04},
997 // Unrecovered read error
998 /* BBD - block marked bad */
999 {0x80, MEDIUM_ERROR, 0x11, 0x04},
1000 // Block marked bad Medium error, unrecovered read error
1001 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1002 };
1003 static const unsigned char stat_table[][4] = {
1004 /* Must be first because BUSY means no other bits valid */
1005 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1006 // Busy, fake parity for now
1007 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1008 // Device ready, unaligned write command
1009 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1010 // Device fault, internal target failure
1011 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1012 // Timed out in xfer, fake parity for now
1013 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1014 // Recovered ECC error Medium error, recovered
1015 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1016 };
1017
1018 /*
1019 * Is this an error we can process/parse
1020 */
1021 if (drv_stat & ATA_BUSY) {
1022 drv_err = 0; /* Ignore the err bits, they're invalid */
1023 }
1024
1025 if (drv_err) {
1026 /* Look for drv_err */
1027 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1028 /* Look for best matches first */
1029 if ((sense_table[i][0] & drv_err) ==
1030 sense_table[i][0]) {
1031 *sk = sense_table[i][1];
1032 *asc = sense_table[i][2];
1033 *ascq = sense_table[i][3];
1034 goto translate_done;
1035 }
1036 }
1037 }
1038
1039 /*
1040 * Fall back to interpreting status bits. Note that if the drv_err
1041 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1042 * is not descriptive enough.
1043 */
1044 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1045 if (stat_table[i][0] & drv_stat) {
1046 *sk = stat_table[i][1];
1047 *asc = stat_table[i][2];
1048 *ascq = stat_table[i][3];
1049 goto translate_done;
1050 }
1051 }
1052
1053 /*
1054 * We need a sensible error return here, which is tricky, and one
1055 * that won't cause people to do things like return a disk wrongly.
1056 */
1057 *sk = ABORTED_COMMAND;
1058 *asc = 0x00;
1059 *ascq = 0x00;
1060
1061 translate_done:
1062 if (verbose)
1063 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1064 id, drv_stat, drv_err, *sk, *asc, *ascq);
1065 return;
1066}
1067
1068/*
1069 * ata_gen_passthru_sense - Generate check condition sense block.
1070 * @qc: Command that completed.
1071 *
1072 * This function is specific to the ATA descriptor format sense
1073 * block specified for the ATA pass through commands. Regardless
1074 * of whether the command errored or not, return a sense
1075 * block. Copy all controller registers into the sense
1076 * block. If there was no error, we get the request from an ATA
1077 * passthrough command, so we use the following sense data:
1078 * sk = RECOVERED ERROR
1079 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1080 *
1081 *
1082 * LOCKING:
1083 * None.
1084 */
1085static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1086{
1087 struct scsi_cmnd *cmd = qc->scsicmd;
1088 struct ata_taskfile *tf = &qc->result_tf;
1089 unsigned char *sb = cmd->sense_buffer;
1090 unsigned char *desc = sb + 8;
1091 int verbose = qc->ap->ops->error_handler == NULL;
1092 u8 sense_key, asc, ascq;
1093
1094 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1095
1096 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1097
1098 /*
1099 * Use ata_to_sense_error() to map status register bits
1100 * onto sense key, asc & ascq.
1101 */
1102 if (qc->err_mask ||
1103 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1104 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1105 &sense_key, &asc, &ascq, verbose);
1106 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1107 } else {
1108 /*
1109 * ATA PASS-THROUGH INFORMATION AVAILABLE
1110 * Always in descriptor format sense.
1111 */
1112 scsi_build_sense_buffer(1, cmd->sense_buffer,
1113 RECOVERED_ERROR, 0, 0x1D);
1114 }
1115
1116 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1117 u8 len;
1118
1119 /* descriptor format */
1120 len = sb[7];
1121 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1122 if (!desc) {
1123 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1124 return;
1125 sb[7] = len + 14;
1126 desc = sb + 8 + len;
1127 }
1128 desc[0] = 9;
1129 desc[1] = 12;
1130 /*
1131 * Copy registers into sense buffer.
1132 */
1133 desc[2] = 0x00;
1134 desc[3] = tf->feature; /* == error reg */
1135 desc[5] = tf->nsect;
1136 desc[7] = tf->lbal;
1137 desc[9] = tf->lbam;
1138 desc[11] = tf->lbah;
1139 desc[12] = tf->device;
1140 desc[13] = tf->command; /* == status reg */
1141
1142 /*
1143 * Fill in Extend bit, and the high order bytes
1144 * if applicable.
1145 */
1146 if (tf->flags & ATA_TFLAG_LBA48) {
1147 desc[2] |= 0x01;
1148 desc[4] = tf->hob_nsect;
1149 desc[6] = tf->hob_lbal;
1150 desc[8] = tf->hob_lbam;
1151 desc[10] = tf->hob_lbah;
1152 }
1153 } else {
1154 /* Fixed sense format */
1155 desc[0] = tf->feature;
1156 desc[1] = tf->command; /* status */
1157 desc[2] = tf->device;
1158 desc[3] = tf->nsect;
1159 desc[7] = 0;
1160 if (tf->flags & ATA_TFLAG_LBA48) {
1161 desc[8] |= 0x80;
1162 if (tf->hob_nsect)
1163 desc[8] |= 0x40;
1164 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1165 desc[8] |= 0x20;
1166 }
1167 desc[9] = tf->lbal;
1168 desc[10] = tf->lbam;
1169 desc[11] = tf->lbah;
1170 }
1171}
1172
1173/**
1174 * ata_gen_ata_sense - generate a SCSI fixed sense block
1175 * @qc: Command that we are erroring out
1176 *
1177 * Generate sense block for a failed ATA command @qc. Descriptor
1178 * format is used to accommodate LBA48 block address.
1179 *
1180 * LOCKING:
1181 * None.
1182 */
1183static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1184{
1185 struct ata_device *dev = qc->dev;
1186 struct scsi_cmnd *cmd = qc->scsicmd;
1187 struct ata_taskfile *tf = &qc->result_tf;
1188 unsigned char *sb = cmd->sense_buffer;
1189 int verbose = qc->ap->ops->error_handler == NULL;
1190 u64 block;
1191 u8 sense_key, asc, ascq;
1192
1193 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1194
1195 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1196
1197 if (ata_dev_disabled(dev)) {
1198 /* Device disabled after error recovery */
1199 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1200 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1201 return;
1202 }
1203 /* Use ata_to_sense_error() to map status register bits
1204 * onto sense key, asc & ascq.
1205 */
1206 if (qc->err_mask ||
1207 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1208 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1209 &sense_key, &asc, &ascq, verbose);
1210 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1211 } else {
1212 /* Could not decode error */
1213 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1214 tf->command, qc->err_mask);
1215 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1216 return;
1217 }
1218
1219 block = ata_tf_read_block(&qc->result_tf, dev);
1220 if (block == U64_MAX)
1221 return;
1222
1223 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1224}
1225
1226static void ata_scsi_sdev_config(struct scsi_device *sdev)
1227{
1228 sdev->use_10_for_rw = 1;
1229 sdev->use_10_for_ms = 1;
1230 sdev->no_write_same = 1;
1231
1232 /* Schedule policy is determined by ->qc_defer() callback and
1233 * it needs to see every deferred qc. Set dev_blocked to 1 to
1234 * prevent SCSI midlayer from automatically deferring
1235 * requests.
1236 */
1237 sdev->max_device_blocked = 1;
1238}
1239
1240/**
1241 * atapi_drain_needed - Check whether data transfer may overflow
1242 * @rq: request to be checked
1243 *
1244 * ATAPI commands which transfer variable length data to host
1245 * might overflow due to application error or hardware bug. This
1246 * function checks whether overflow should be drained and ignored
1247 * for @request.
1248 *
1249 * LOCKING:
1250 * None.
1251 *
1252 * RETURNS:
1253 * 1 if ; otherwise, 0.
1254 */
1255static int atapi_drain_needed(struct request *rq)
1256{
1257 if (likely(!blk_rq_is_passthrough(rq)))
1258 return 0;
1259
1260 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1261 return 0;
1262
1263 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1264}
1265
1266static int ata_scsi_dev_config(struct scsi_device *sdev,
1267 struct ata_device *dev)
1268{
1269 struct request_queue *q = sdev->request_queue;
1270
1271 if (!ata_id_has_unload(dev->id))
1272 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1273
1274 /* configure max sectors */
1275 blk_queue_max_hw_sectors(q, dev->max_sectors);
1276
1277 if (dev->class == ATA_DEV_ATAPI) {
1278 void *buf;
1279
1280 sdev->sector_size = ATA_SECT_SIZE;
1281
1282 /* set DMA padding */
1283 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1284
1285 /* configure draining */
1286 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1287 if (!buf) {
1288 ata_dev_err(dev, "drain buffer allocation failed\n");
1289 return -ENOMEM;
1290 }
1291
1292 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1293 } else {
1294 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1295 sdev->manage_start_stop = 1;
1296 }
1297
1298 /*
1299 * ata_pio_sectors() expects buffer for each sector to not cross
1300 * page boundary. Enforce it by requiring buffers to be sector
1301 * aligned, which works iff sector_size is not larger than
1302 * PAGE_SIZE. ATAPI devices also need the alignment as
1303 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1304 */
1305 if (sdev->sector_size > PAGE_SIZE)
1306 ata_dev_warn(dev,
1307 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1308 sdev->sector_size);
1309
1310 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1311
1312 if (dev->flags & ATA_DFLAG_AN)
1313 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1314
1315 if (dev->flags & ATA_DFLAG_NCQ) {
1316 int depth;
1317
1318 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1319 depth = min(ATA_MAX_QUEUE - 1, depth);
1320 scsi_change_queue_depth(sdev, depth);
1321 }
1322
1323 blk_queue_flush_queueable(q, false);
1324
1325 if (dev->flags & ATA_DFLAG_TRUSTED)
1326 sdev->security_supported = 1;
1327
1328 dev->sdev = sdev;
1329 return 0;
1330}
1331
1332/**
1333 * ata_scsi_slave_config - Set SCSI device attributes
1334 * @sdev: SCSI device to examine
1335 *
1336 * This is called before we actually start reading
1337 * and writing to the device, to configure certain
1338 * SCSI mid-layer behaviors.
1339 *
1340 * LOCKING:
1341 * Defined by SCSI layer. We don't really care.
1342 */
1343
1344int ata_scsi_slave_config(struct scsi_device *sdev)
1345{
1346 struct ata_port *ap = ata_shost_to_port(sdev->host);
1347 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1348 int rc = 0;
1349
1350 ata_scsi_sdev_config(sdev);
1351
1352 if (dev)
1353 rc = ata_scsi_dev_config(sdev, dev);
1354
1355 return rc;
1356}
1357
1358/**
1359 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1360 * @sdev: SCSI device to be destroyed
1361 *
1362 * @sdev is about to be destroyed for hot/warm unplugging. If
1363 * this unplugging was initiated by libata as indicated by NULL
1364 * dev->sdev, this function doesn't have to do anything.
1365 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1366 * Clear dev->sdev, schedule the device for ATA detach and invoke
1367 * EH.
1368 *
1369 * LOCKING:
1370 * Defined by SCSI layer. We don't really care.
1371 */
1372void ata_scsi_slave_destroy(struct scsi_device *sdev)
1373{
1374 struct ata_port *ap = ata_shost_to_port(sdev->host);
1375 struct request_queue *q = sdev->request_queue;
1376 unsigned long flags;
1377 struct ata_device *dev;
1378
1379 if (!ap->ops->error_handler)
1380 return;
1381
1382 spin_lock_irqsave(ap->lock, flags);
1383 dev = __ata_scsi_find_dev(ap, sdev);
1384 if (dev && dev->sdev) {
1385 /* SCSI device already in CANCEL state, no need to offline it */
1386 dev->sdev = NULL;
1387 dev->flags |= ATA_DFLAG_DETACH;
1388 ata_port_schedule_eh(ap);
1389 }
1390 spin_unlock_irqrestore(ap->lock, flags);
1391
1392 kfree(q->dma_drain_buffer);
1393 q->dma_drain_buffer = NULL;
1394 q->dma_drain_size = 0;
1395}
1396
1397/**
1398 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1399 * @ap: ATA port to which the device change the queue depth
1400 * @sdev: SCSI device to configure queue depth for
1401 * @queue_depth: new queue depth
1402 *
1403 * libsas and libata have different approaches for associating a sdev to
1404 * its ata_port.
1405 *
1406 */
1407int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1408 int queue_depth)
1409{
1410 struct ata_device *dev;
1411 unsigned long flags;
1412
1413 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1414 return sdev->queue_depth;
1415
1416 dev = ata_scsi_find_dev(ap, sdev);
1417 if (!dev || !ata_dev_enabled(dev))
1418 return sdev->queue_depth;
1419
1420 /* NCQ enabled? */
1421 spin_lock_irqsave(ap->lock, flags);
1422 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1423 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1424 dev->flags |= ATA_DFLAG_NCQ_OFF;
1425 queue_depth = 1;
1426 }
1427 spin_unlock_irqrestore(ap->lock, flags);
1428
1429 /* limit and apply queue depth */
1430 queue_depth = min(queue_depth, sdev->host->can_queue);
1431 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1432 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1433
1434 if (sdev->queue_depth == queue_depth)
1435 return -EINVAL;
1436
1437 return scsi_change_queue_depth(sdev, queue_depth);
1438}
1439
1440/**
1441 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1442 * @sdev: SCSI device to configure queue depth for
1443 * @queue_depth: new queue depth
1444 *
1445 * This is libata standard hostt->change_queue_depth callback.
1446 * SCSI will call into this callback when user tries to set queue
1447 * depth via sysfs.
1448 *
1449 * LOCKING:
1450 * SCSI layer (we don't care)
1451 *
1452 * RETURNS:
1453 * Newly configured queue depth.
1454 */
1455int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1456{
1457 struct ata_port *ap = ata_shost_to_port(sdev->host);
1458
1459 return __ata_change_queue_depth(ap, sdev, queue_depth);
1460}
1461
1462/**
1463 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1464 * @qc: Storage for translated ATA taskfile
1465 *
1466 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1467 * (to start). Perhaps these commands should be preceded by
1468 * CHECK POWER MODE to see what power mode the device is already in.
1469 * [See SAT revision 5 at www.t10.org]
1470 *
1471 * LOCKING:
1472 * spin_lock_irqsave(host lock)
1473 *
1474 * RETURNS:
1475 * Zero on success, non-zero on error.
1476 */
1477static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1478{
1479 struct scsi_cmnd *scmd = qc->scsicmd;
1480 struct ata_taskfile *tf = &qc->tf;
1481 const u8 *cdb = scmd->cmnd;
1482 u16 fp;
1483 u8 bp = 0xff;
1484
1485 if (scmd->cmd_len < 5) {
1486 fp = 4;
1487 goto invalid_fld;
1488 }
1489
1490 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1491 tf->protocol = ATA_PROT_NODATA;
1492 if (cdb[1] & 0x1) {
1493 ; /* ignore IMMED bit, violates sat-r05 */
1494 }
1495 if (cdb[4] & 0x2) {
1496 fp = 4;
1497 bp = 1;
1498 goto invalid_fld; /* LOEJ bit set not supported */
1499 }
1500 if (((cdb[4] >> 4) & 0xf) != 0) {
1501 fp = 4;
1502 bp = 3;
1503 goto invalid_fld; /* power conditions not supported */
1504 }
1505
1506 if (cdb[4] & 0x1) {
1507 tf->nsect = 1; /* 1 sector, lba=0 */
1508
1509 if (qc->dev->flags & ATA_DFLAG_LBA) {
1510 tf->flags |= ATA_TFLAG_LBA;
1511
1512 tf->lbah = 0x0;
1513 tf->lbam = 0x0;
1514 tf->lbal = 0x0;
1515 tf->device |= ATA_LBA;
1516 } else {
1517 /* CHS */
1518 tf->lbal = 0x1; /* sect */
1519 tf->lbam = 0x0; /* cyl low */
1520 tf->lbah = 0x0; /* cyl high */
1521 }
1522
1523 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1524 } else {
1525 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1526 * or S5) causing some drives to spin up and down again.
1527 */
1528 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1529 system_state == SYSTEM_POWER_OFF)
1530 goto skip;
1531
1532 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1533 system_entering_hibernation())
1534 goto skip;
1535
1536 /* Issue ATA STANDBY IMMEDIATE command */
1537 tf->command = ATA_CMD_STANDBYNOW1;
1538 }
1539
1540 /*
1541 * Standby and Idle condition timers could be implemented but that
1542 * would require libata to implement the Power condition mode page
1543 * and allow the user to change it. Changing mode pages requires
1544 * MODE SELECT to be implemented.
1545 */
1546
1547 return 0;
1548
1549 invalid_fld:
1550 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1551 return 1;
1552 skip:
1553 scmd->result = SAM_STAT_GOOD;
1554 return 1;
1555}
1556
1557
1558/**
1559 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1560 * @qc: Storage for translated ATA taskfile
1561 *
1562 * Sets up an ATA taskfile to issue FLUSH CACHE or
1563 * FLUSH CACHE EXT.
1564 *
1565 * LOCKING:
1566 * spin_lock_irqsave(host lock)
1567 *
1568 * RETURNS:
1569 * Zero on success, non-zero on error.
1570 */
1571static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1572{
1573 struct ata_taskfile *tf = &qc->tf;
1574
1575 tf->flags |= ATA_TFLAG_DEVICE;
1576 tf->protocol = ATA_PROT_NODATA;
1577
1578 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1579 tf->command = ATA_CMD_FLUSH_EXT;
1580 else
1581 tf->command = ATA_CMD_FLUSH;
1582
1583 /* flush is critical for IO integrity, consider it an IO command */
1584 qc->flags |= ATA_QCFLAG_IO;
1585
1586 return 0;
1587}
1588
1589/**
1590 * scsi_6_lba_len - Get LBA and transfer length
1591 * @cdb: SCSI command to translate
1592 *
1593 * Calculate LBA and transfer length for 6-byte commands.
1594 *
1595 * RETURNS:
1596 * @plba: the LBA
1597 * @plen: the transfer length
1598 */
1599static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1600{
1601 u64 lba = 0;
1602 u32 len;
1603
1604 VPRINTK("six-byte command\n");
1605
1606 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1607 lba |= ((u64)cdb[2]) << 8;
1608 lba |= ((u64)cdb[3]);
1609
1610 len = cdb[4];
1611
1612 *plba = lba;
1613 *plen = len;
1614}
1615
1616/**
1617 * scsi_10_lba_len - Get LBA and transfer length
1618 * @cdb: SCSI command to translate
1619 *
1620 * Calculate LBA and transfer length for 10-byte commands.
1621 *
1622 * RETURNS:
1623 * @plba: the LBA
1624 * @plen: the transfer length
1625 */
1626static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1627{
1628 u64 lba = 0;
1629 u32 len = 0;
1630
1631 VPRINTK("ten-byte command\n");
1632
1633 lba |= ((u64)cdb[2]) << 24;
1634 lba |= ((u64)cdb[3]) << 16;
1635 lba |= ((u64)cdb[4]) << 8;
1636 lba |= ((u64)cdb[5]);
1637
1638 len |= ((u32)cdb[7]) << 8;
1639 len |= ((u32)cdb[8]);
1640
1641 *plba = lba;
1642 *plen = len;
1643}
1644
1645/**
1646 * scsi_16_lba_len - Get LBA and transfer length
1647 * @cdb: SCSI command to translate
1648 *
1649 * Calculate LBA and transfer length for 16-byte commands.
1650 *
1651 * RETURNS:
1652 * @plba: the LBA
1653 * @plen: the transfer length
1654 */
1655static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1656{
1657 u64 lba = 0;
1658 u32 len = 0;
1659
1660 VPRINTK("sixteen-byte command\n");
1661
1662 lba |= ((u64)cdb[2]) << 56;
1663 lba |= ((u64)cdb[3]) << 48;
1664 lba |= ((u64)cdb[4]) << 40;
1665 lba |= ((u64)cdb[5]) << 32;
1666 lba |= ((u64)cdb[6]) << 24;
1667 lba |= ((u64)cdb[7]) << 16;
1668 lba |= ((u64)cdb[8]) << 8;
1669 lba |= ((u64)cdb[9]);
1670
1671 len |= ((u32)cdb[10]) << 24;
1672 len |= ((u32)cdb[11]) << 16;
1673 len |= ((u32)cdb[12]) << 8;
1674 len |= ((u32)cdb[13]);
1675
1676 *plba = lba;
1677 *plen = len;
1678}
1679
1680/**
1681 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1682 * @qc: Storage for translated ATA taskfile
1683 *
1684 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1685 *
1686 * LOCKING:
1687 * spin_lock_irqsave(host lock)
1688 *
1689 * RETURNS:
1690 * Zero on success, non-zero on error.
1691 */
1692static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1693{
1694 struct scsi_cmnd *scmd = qc->scsicmd;
1695 struct ata_taskfile *tf = &qc->tf;
1696 struct ata_device *dev = qc->dev;
1697 u64 dev_sectors = qc->dev->n_sectors;
1698 const u8 *cdb = scmd->cmnd;
1699 u64 block;
1700 u32 n_block;
1701 u16 fp;
1702
1703 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1704 tf->protocol = ATA_PROT_NODATA;
1705
1706 if (cdb[0] == VERIFY) {
1707 if (scmd->cmd_len < 10) {
1708 fp = 9;
1709 goto invalid_fld;
1710 }
1711 scsi_10_lba_len(cdb, &block, &n_block);
1712 } else if (cdb[0] == VERIFY_16) {
1713 if (scmd->cmd_len < 16) {
1714 fp = 15;
1715 goto invalid_fld;
1716 }
1717 scsi_16_lba_len(cdb, &block, &n_block);
1718 } else {
1719 fp = 0;
1720 goto invalid_fld;
1721 }
1722
1723 if (!n_block)
1724 goto nothing_to_do;
1725 if (block >= dev_sectors)
1726 goto out_of_range;
1727 if ((block + n_block) > dev_sectors)
1728 goto out_of_range;
1729
1730 if (dev->flags & ATA_DFLAG_LBA) {
1731 tf->flags |= ATA_TFLAG_LBA;
1732
1733 if (lba_28_ok(block, n_block)) {
1734 /* use LBA28 */
1735 tf->command = ATA_CMD_VERIFY;
1736 tf->device |= (block >> 24) & 0xf;
1737 } else if (lba_48_ok(block, n_block)) {
1738 if (!(dev->flags & ATA_DFLAG_LBA48))
1739 goto out_of_range;
1740
1741 /* use LBA48 */
1742 tf->flags |= ATA_TFLAG_LBA48;
1743 tf->command = ATA_CMD_VERIFY_EXT;
1744
1745 tf->hob_nsect = (n_block >> 8) & 0xff;
1746
1747 tf->hob_lbah = (block >> 40) & 0xff;
1748 tf->hob_lbam = (block >> 32) & 0xff;
1749 tf->hob_lbal = (block >> 24) & 0xff;
1750 } else
1751 /* request too large even for LBA48 */
1752 goto out_of_range;
1753
1754 tf->nsect = n_block & 0xff;
1755
1756 tf->lbah = (block >> 16) & 0xff;
1757 tf->lbam = (block >> 8) & 0xff;
1758 tf->lbal = block & 0xff;
1759
1760 tf->device |= ATA_LBA;
1761 } else {
1762 /* CHS */
1763 u32 sect, head, cyl, track;
1764
1765 if (!lba_28_ok(block, n_block))
1766 goto out_of_range;
1767
1768 /* Convert LBA to CHS */
1769 track = (u32)block / dev->sectors;
1770 cyl = track / dev->heads;
1771 head = track % dev->heads;
1772 sect = (u32)block % dev->sectors + 1;
1773
1774 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1775 (u32)block, track, cyl, head, sect);
1776
1777 /* Check whether the converted CHS can fit.
1778 Cylinder: 0-65535
1779 Head: 0-15
1780 Sector: 1-255*/
1781 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1782 goto out_of_range;
1783
1784 tf->command = ATA_CMD_VERIFY;
1785 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1786 tf->lbal = sect;
1787 tf->lbam = cyl;
1788 tf->lbah = cyl >> 8;
1789 tf->device |= head;
1790 }
1791
1792 return 0;
1793
1794invalid_fld:
1795 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1796 return 1;
1797
1798out_of_range:
1799 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1800 /* "Logical Block Address out of range" */
1801 return 1;
1802
1803nothing_to_do:
1804 scmd->result = SAM_STAT_GOOD;
1805 return 1;
1806}
1807
1808/**
1809 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1810 * @qc: Storage for translated ATA taskfile
1811 *
1812 * Converts any of six SCSI read/write commands into the
1813 * ATA counterpart, including starting sector (LBA),
1814 * sector count, and taking into account the device's LBA48
1815 * support.
1816 *
1817 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1818 * %WRITE_16 are currently supported.
1819 *
1820 * LOCKING:
1821 * spin_lock_irqsave(host lock)
1822 *
1823 * RETURNS:
1824 * Zero on success, non-zero on error.
1825 */
1826static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1827{
1828 struct scsi_cmnd *scmd = qc->scsicmd;
1829 const u8 *cdb = scmd->cmnd;
1830 struct request *rq = scmd->request;
1831 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1832 unsigned int tf_flags = 0;
1833 u64 block;
1834 u32 n_block;
1835 int rc;
1836 u16 fp = 0;
1837
1838 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1839 tf_flags |= ATA_TFLAG_WRITE;
1840
1841 /* Calculate the SCSI LBA, transfer length and FUA. */
1842 switch (cdb[0]) {
1843 case READ_10:
1844 case WRITE_10:
1845 if (unlikely(scmd->cmd_len < 10)) {
1846 fp = 9;
1847 goto invalid_fld;
1848 }
1849 scsi_10_lba_len(cdb, &block, &n_block);
1850 if (cdb[1] & (1 << 3))
1851 tf_flags |= ATA_TFLAG_FUA;
1852 break;
1853 case READ_6:
1854 case WRITE_6:
1855 if (unlikely(scmd->cmd_len < 6)) {
1856 fp = 5;
1857 goto invalid_fld;
1858 }
1859 scsi_6_lba_len(cdb, &block, &n_block);
1860
1861 /* for 6-byte r/w commands, transfer length 0
1862 * means 256 blocks of data, not 0 block.
1863 */
1864 if (!n_block)
1865 n_block = 256;
1866 break;
1867 case READ_16:
1868 case WRITE_16:
1869 if (unlikely(scmd->cmd_len < 16)) {
1870 fp = 15;
1871 goto invalid_fld;
1872 }
1873 scsi_16_lba_len(cdb, &block, &n_block);
1874 if (cdb[1] & (1 << 3))
1875 tf_flags |= ATA_TFLAG_FUA;
1876 break;
1877 default:
1878 DPRINTK("no-byte command\n");
1879 fp = 0;
1880 goto invalid_fld;
1881 }
1882
1883 /* Check and compose ATA command */
1884 if (!n_block)
1885 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1886 * length 0 means transfer 0 block of data.
1887 * However, for ATA R/W commands, sector count 0 means
1888 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1889 *
1890 * WARNING: one or two older ATA drives treat 0 as 0...
1891 */
1892 goto nothing_to_do;
1893
1894 qc->flags |= ATA_QCFLAG_IO;
1895 qc->nbytes = n_block * scmd->device->sector_size;
1896
1897 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1898 qc->tag, class);
1899
1900 if (likely(rc == 0))
1901 return 0;
1902
1903 if (rc == -ERANGE)
1904 goto out_of_range;
1905 /* treat all other errors as -EINVAL, fall through */
1906invalid_fld:
1907 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1908 return 1;
1909
1910out_of_range:
1911 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1912 /* "Logical Block Address out of range" */
1913 return 1;
1914
1915nothing_to_do:
1916 scmd->result = SAM_STAT_GOOD;
1917 return 1;
1918}
1919
1920static void ata_qc_done(struct ata_queued_cmd *qc)
1921{
1922 struct scsi_cmnd *cmd = qc->scsicmd;
1923 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1924
1925 ata_qc_free(qc);
1926 done(cmd);
1927}
1928
1929static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1930{
1931 struct ata_port *ap = qc->ap;
1932 struct scsi_cmnd *cmd = qc->scsicmd;
1933 u8 *cdb = cmd->cmnd;
1934 int need_sense = (qc->err_mask != 0);
1935
1936 /* For ATA pass thru (SAT) commands, generate a sense block if
1937 * user mandated it or if there's an error. Note that if we
1938 * generate because the user forced us to [CK_COND =1], a check
1939 * condition is generated and the ATA register values are returned
1940 * whether the command completed successfully or not. If there
1941 * was no error, we use the following sense data:
1942 * sk = RECOVERED ERROR
1943 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1944 */
1945 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1946 ((cdb[2] & 0x20) || need_sense))
1947 ata_gen_passthru_sense(qc);
1948 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1949 cmd->result = SAM_STAT_CHECK_CONDITION;
1950 else if (need_sense)
1951 ata_gen_ata_sense(qc);
1952 else
1953 cmd->result = SAM_STAT_GOOD;
1954
1955 if (need_sense && !ap->ops->error_handler)
1956 ata_dump_status(ap->print_id, &qc->result_tf);
1957
1958 ata_qc_done(qc);
1959}
1960
1961/**
1962 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1963 * @dev: ATA device to which the command is addressed
1964 * @cmd: SCSI command to execute
1965 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1966 *
1967 * Our ->queuecommand() function has decided that the SCSI
1968 * command issued can be directly translated into an ATA
1969 * command, rather than handled internally.
1970 *
1971 * This function sets up an ata_queued_cmd structure for the
1972 * SCSI command, and sends that ata_queued_cmd to the hardware.
1973 *
1974 * The xlat_func argument (actor) returns 0 if ready to execute
1975 * ATA command, else 1 to finish translation. If 1 is returned
1976 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1977 * to be set reflecting an error condition or clean (early)
1978 * termination.
1979 *
1980 * LOCKING:
1981 * spin_lock_irqsave(host lock)
1982 *
1983 * RETURNS:
1984 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1985 * needs to be deferred.
1986 */
1987static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1988 ata_xlat_func_t xlat_func)
1989{
1990 struct ata_port *ap = dev->link->ap;
1991 struct ata_queued_cmd *qc;
1992 int rc;
1993
1994 VPRINTK("ENTER\n");
1995
1996 qc = ata_scsi_qc_new(dev, cmd);
1997 if (!qc)
1998 goto err_mem;
1999
2000 /* data is present; dma-map it */
2001 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2002 cmd->sc_data_direction == DMA_TO_DEVICE) {
2003 if (unlikely(scsi_bufflen(cmd) < 1)) {
2004 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2005 goto err_did;
2006 }
2007
2008 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2009
2010 qc->dma_dir = cmd->sc_data_direction;
2011 }
2012
2013 qc->complete_fn = ata_scsi_qc_complete;
2014
2015 if (xlat_func(qc))
2016 goto early_finish;
2017
2018 if (ap->ops->qc_defer) {
2019 if ((rc = ap->ops->qc_defer(qc)))
2020 goto defer;
2021 }
2022
2023 /* select device, send command to hardware */
2024 ata_qc_issue(qc);
2025
2026 VPRINTK("EXIT\n");
2027 return 0;
2028
2029early_finish:
2030 ata_qc_free(qc);
2031 cmd->scsi_done(cmd);
2032 DPRINTK("EXIT - early finish (good or error)\n");
2033 return 0;
2034
2035err_did:
2036 ata_qc_free(qc);
2037 cmd->result = (DID_ERROR << 16);
2038 cmd->scsi_done(cmd);
2039err_mem:
2040 DPRINTK("EXIT - internal\n");
2041 return 0;
2042
2043defer:
2044 ata_qc_free(qc);
2045 DPRINTK("EXIT - defer\n");
2046 if (rc == ATA_DEFER_LINK)
2047 return SCSI_MLQUEUE_DEVICE_BUSY;
2048 else
2049 return SCSI_MLQUEUE_HOST_BUSY;
2050}
2051
2052struct ata_scsi_args {
2053 struct ata_device *dev;
2054 u16 *id;
2055 struct scsi_cmnd *cmd;
2056};
2057
2058/**
2059 * ata_scsi_rbuf_get - Map response buffer.
2060 * @cmd: SCSI command containing buffer to be mapped.
2061 * @flags: unsigned long variable to store irq enable status
2062 * @copy_in: copy in from user buffer
2063 *
2064 * Prepare buffer for simulated SCSI commands.
2065 *
2066 * LOCKING:
2067 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2068 *
2069 * RETURNS:
2070 * Pointer to response buffer.
2071 */
2072static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2073 unsigned long *flags)
2074{
2075 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2076
2077 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2078 if (copy_in)
2079 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2080 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2081 return ata_scsi_rbuf;
2082}
2083
2084/**
2085 * ata_scsi_rbuf_put - Unmap response buffer.
2086 * @cmd: SCSI command containing buffer to be unmapped.
2087 * @copy_out: copy out result
2088 * @flags: @flags passed to ata_scsi_rbuf_get()
2089 *
2090 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2091 * @copy_back is true.
2092 *
2093 * LOCKING:
2094 * Unlocks ata_scsi_rbuf_lock.
2095 */
2096static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2097 unsigned long *flags)
2098{
2099 if (copy_out)
2100 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2101 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2102 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2103}
2104
2105/**
2106 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2107 * @args: device IDENTIFY data / SCSI command of interest.
2108 * @actor: Callback hook for desired SCSI command simulator
2109 *
2110 * Takes care of the hard work of simulating a SCSI command...
2111 * Mapping the response buffer, calling the command's handler,
2112 * and handling the handler's return value. This return value
2113 * indicates whether the handler wishes the SCSI command to be
2114 * completed successfully (0), or not (in which case cmd->result
2115 * and sense buffer are assumed to be set).
2116 *
2117 * LOCKING:
2118 * spin_lock_irqsave(host lock)
2119 */
2120static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2121 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2122{
2123 u8 *rbuf;
2124 unsigned int rc;
2125 struct scsi_cmnd *cmd = args->cmd;
2126 unsigned long flags;
2127
2128 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2129 rc = actor(args, rbuf);
2130 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2131
2132 if (rc == 0)
2133 cmd->result = SAM_STAT_GOOD;
2134}
2135
2136/**
2137 * ata_scsiop_inq_std - Simulate INQUIRY command
2138 * @args: device IDENTIFY data / SCSI command of interest.
2139 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2140 *
2141 * Returns standard device identification data associated
2142 * with non-VPD INQUIRY command output.
2143 *
2144 * LOCKING:
2145 * spin_lock_irqsave(host lock)
2146 */
2147static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2148{
2149 static const u8 versions[] = {
2150 0x00,
2151 0x60, /* SAM-3 (no version claimed) */
2152
2153 0x03,
2154 0x20, /* SBC-2 (no version claimed) */
2155
2156 0x03,
2157 0x00 /* SPC-3 (no version claimed) */
2158 };
2159 static const u8 versions_zbc[] = {
2160 0x00,
2161 0xA0, /* SAM-5 (no version claimed) */
2162
2163 0x06,
2164 0x00, /* SBC-4 (no version claimed) */
2165
2166 0x05,
2167 0xC0, /* SPC-5 (no version claimed) */
2168
2169 0x60,
2170 0x24, /* ZBC r05 */
2171 };
2172
2173 u8 hdr[] = {
2174 TYPE_DISK,
2175 0,
2176 0x5, /* claim SPC-3 version compatibility */
2177 2,
2178 95 - 4,
2179 0,
2180 0,
2181 2
2182 };
2183
2184 VPRINTK("ENTER\n");
2185
2186 /* set scsi removable (RMB) bit per ata bit, or if the
2187 * AHCI port says it's external (Hotplug-capable, eSATA).
2188 */
2189 if (ata_id_removable(args->id) ||
2190 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2191 hdr[1] |= (1 << 7);
2192
2193 if (args->dev->class == ATA_DEV_ZAC) {
2194 hdr[0] = TYPE_ZBC;
2195 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2196 }
2197
2198 memcpy(rbuf, hdr, sizeof(hdr));
2199 memcpy(&rbuf[8], "ATA ", 8);
2200 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2201
2202 /* From SAT, use last 2 words from fw rev unless they are spaces */
2203 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2204 if (strncmp(&rbuf[32], " ", 4) == 0)
2205 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2206
2207 if (rbuf[32] == 0 || rbuf[32] == ' ')
2208 memcpy(&rbuf[32], "n/a ", 4);
2209
2210 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2211 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2212 else
2213 memcpy(rbuf + 58, versions, sizeof(versions));
2214
2215 return 0;
2216}
2217
2218/**
2219 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2220 * @args: device IDENTIFY data / SCSI command of interest.
2221 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2222 *
2223 * Returns list of inquiry VPD pages available.
2224 *
2225 * LOCKING:
2226 * spin_lock_irqsave(host lock)
2227 */
2228static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2229{
2230 int num_pages;
2231 static const u8 pages[] = {
2232 0x00, /* page 0x00, this page */
2233 0x80, /* page 0x80, unit serial no page */
2234 0x83, /* page 0x83, device ident page */
2235 0x89, /* page 0x89, ata info page */
2236 0xb0, /* page 0xb0, block limits page */
2237 0xb1, /* page 0xb1, block device characteristics page */
2238 0xb2, /* page 0xb2, thin provisioning page */
2239 0xb6, /* page 0xb6, zoned block device characteristics */
2240 };
2241
2242 num_pages = sizeof(pages);
2243 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2244 num_pages--;
2245 rbuf[3] = num_pages; /* number of supported VPD pages */
2246 memcpy(rbuf + 4, pages, num_pages);
2247 return 0;
2248}
2249
2250/**
2251 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2252 * @args: device IDENTIFY data / SCSI command of interest.
2253 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2254 *
2255 * Returns ATA device serial number.
2256 *
2257 * LOCKING:
2258 * spin_lock_irqsave(host lock)
2259 */
2260static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2261{
2262 static const u8 hdr[] = {
2263 0,
2264 0x80, /* this page code */
2265 0,
2266 ATA_ID_SERNO_LEN, /* page len */
2267 };
2268
2269 memcpy(rbuf, hdr, sizeof(hdr));
2270 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2271 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2272 return 0;
2273}
2274
2275/**
2276 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2277 * @args: device IDENTIFY data / SCSI command of interest.
2278 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2279 *
2280 * Yields two logical unit device identification designators:
2281 * - vendor specific ASCII containing the ATA serial number
2282 * - SAT defined "t10 vendor id based" containing ASCII vendor
2283 * name ("ATA "), model and serial numbers.
2284 *
2285 * LOCKING:
2286 * spin_lock_irqsave(host lock)
2287 */
2288static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2289{
2290 const int sat_model_serial_desc_len = 68;
2291 int num;
2292
2293 rbuf[1] = 0x83; /* this page code */
2294 num = 4;
2295
2296 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2297 rbuf[num + 0] = 2;
2298 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2299 num += 4;
2300 ata_id_string(args->id, (unsigned char *) rbuf + num,
2301 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2302 num += ATA_ID_SERNO_LEN;
2303
2304 /* SAT defined lu model and serial numbers descriptor */
2305 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2306 rbuf[num + 0] = 2;
2307 rbuf[num + 1] = 1;
2308 rbuf[num + 3] = sat_model_serial_desc_len;
2309 num += 4;
2310 memcpy(rbuf + num, "ATA ", 8);
2311 num += 8;
2312 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2313 ATA_ID_PROD_LEN);
2314 num += ATA_ID_PROD_LEN;
2315 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2316 ATA_ID_SERNO_LEN);
2317 num += ATA_ID_SERNO_LEN;
2318
2319 if (ata_id_has_wwn(args->id)) {
2320 /* SAT defined lu world wide name */
2321 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2322 rbuf[num + 0] = 1;
2323 rbuf[num + 1] = 3;
2324 rbuf[num + 3] = ATA_ID_WWN_LEN;
2325 num += 4;
2326 ata_id_string(args->id, (unsigned char *) rbuf + num,
2327 ATA_ID_WWN, ATA_ID_WWN_LEN);
2328 num += ATA_ID_WWN_LEN;
2329 }
2330 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2331 return 0;
2332}
2333
2334/**
2335 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2336 * @args: device IDENTIFY data / SCSI command of interest.
2337 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2338 *
2339 * Yields SAT-specified ATA VPD page.
2340 *
2341 * LOCKING:
2342 * spin_lock_irqsave(host lock)
2343 */
2344static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2345{
2346 struct ata_taskfile tf;
2347
2348 memset(&tf, 0, sizeof(tf));
2349
2350 rbuf[1] = 0x89; /* our page code */
2351 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2352 rbuf[3] = (0x238 & 0xff);
2353
2354 memcpy(&rbuf[8], "linux ", 8);
2355 memcpy(&rbuf[16], "libata ", 16);
2356 memcpy(&rbuf[32], DRV_VERSION, 4);
2357
2358 /* we don't store the ATA device signature, so we fake it */
2359
2360 tf.command = ATA_DRDY; /* really, this is Status reg */
2361 tf.lbal = 0x1;
2362 tf.nsect = 0x1;
2363
2364 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2365 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2366
2367 rbuf[56] = ATA_CMD_ID_ATA;
2368
2369 memcpy(&rbuf[60], &args->id[0], 512);
2370 return 0;
2371}
2372
2373static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2374{
2375 u16 min_io_sectors;
2376
2377 rbuf[1] = 0xb0;
2378 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2379
2380 /*
2381 * Optimal transfer length granularity.
2382 *
2383 * This is always one physical block, but for disks with a smaller
2384 * logical than physical sector size we need to figure out what the
2385 * latter is.
2386 */
2387 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2388 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2389
2390 /*
2391 * Optimal unmap granularity.
2392 *
2393 * The ATA spec doesn't even know about a granularity or alignment
2394 * for the TRIM command. We can leave away most of the unmap related
2395 * VPD page entries, but we have specifify a granularity to signal
2396 * that we support some form of unmap - in thise case via WRITE SAME
2397 * with the unmap bit set.
2398 */
2399 if (ata_id_has_trim(args->id)) {
2400 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2401 put_unaligned_be32(1, &rbuf[28]);
2402 }
2403
2404 return 0;
2405}
2406
2407static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2408{
2409 int form_factor = ata_id_form_factor(args->id);
2410 int media_rotation_rate = ata_id_rotation_rate(args->id);
2411 u8 zoned = ata_id_zoned_cap(args->id);
2412
2413 rbuf[1] = 0xb1;
2414 rbuf[3] = 0x3c;
2415 rbuf[4] = media_rotation_rate >> 8;
2416 rbuf[5] = media_rotation_rate;
2417 rbuf[7] = form_factor;
2418 if (zoned)
2419 rbuf[8] = (zoned << 4);
2420
2421 return 0;
2422}
2423
2424static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2425{
2426 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2427 rbuf[1] = 0xb2;
2428 rbuf[3] = 0x4;
2429 rbuf[5] = 1 << 6; /* TPWS */
2430
2431 return 0;
2432}
2433
2434static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2435{
2436 /*
2437 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2438 */
2439 rbuf[1] = 0xb6;
2440 rbuf[3] = 0x3C;
2441
2442 /*
2443 * URSWRZ bit is only meaningful for host-managed ZAC drives
2444 */
2445 if (args->dev->zac_zoned_cap & 1)
2446 rbuf[4] |= 1;
2447 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2448 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2449 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2450
2451 return 0;
2452}
2453
2454/**
2455 * modecpy - Prepare response for MODE SENSE
2456 * @dest: output buffer
2457 * @src: data being copied
2458 * @n: length of mode page
2459 * @changeable: whether changeable parameters are requested
2460 *
2461 * Generate a generic MODE SENSE page for either current or changeable
2462 * parameters.
2463 *
2464 * LOCKING:
2465 * None.
2466 */
2467static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2468{
2469 if (changeable) {
2470 memcpy(dest, src, 2);
2471 memset(dest + 2, 0, n - 2);
2472 } else {
2473 memcpy(dest, src, n);
2474 }
2475}
2476
2477/**
2478 * ata_msense_caching - Simulate MODE SENSE caching info page
2479 * @id: device IDENTIFY data
2480 * @buf: output buffer
2481 * @changeable: whether changeable parameters are requested
2482 *
2483 * Generate a caching info page, which conditionally indicates
2484 * write caching to the SCSI layer, depending on device
2485 * capabilities.
2486 *
2487 * LOCKING:
2488 * None.
2489 */
2490static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2491{
2492 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2493 if (changeable) {
2494 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2495 } else {
2496 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2497 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2498 }
2499 return sizeof(def_cache_mpage);
2500}
2501
2502/**
2503 * ata_msense_control - Simulate MODE SENSE control mode page
2504 * @dev: ATA device of interest
2505 * @buf: output buffer
2506 * @changeable: whether changeable parameters are requested
2507 *
2508 * Generate a generic MODE SENSE control mode page.
2509 *
2510 * LOCKING:
2511 * None.
2512 */
2513static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2514 bool changeable)
2515{
2516 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2517 if (changeable) {
2518 buf[2] |= (1 << 2); /* ata_mselect_control() */
2519 } else {
2520 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2521
2522 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2523 }
2524 return sizeof(def_control_mpage);
2525}
2526
2527/**
2528 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2529 * @buf: output buffer
2530 * @changeable: whether changeable parameters are requested
2531 *
2532 * Generate a generic MODE SENSE r/w error recovery page.
2533 *
2534 * LOCKING:
2535 * None.
2536 */
2537static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2538{
2539 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2540 changeable);
2541 return sizeof(def_rw_recovery_mpage);
2542}
2543
2544/*
2545 * We can turn this into a real blacklist if it's needed, for now just
2546 * blacklist any Maxtor BANC1G10 revision firmware
2547 */
2548static int ata_dev_supports_fua(u16 *id)
2549{
2550 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2551
2552 if (!libata_fua)
2553 return 0;
2554 if (!ata_id_has_fua(id))
2555 return 0;
2556
2557 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2558 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2559
2560 if (strcmp(model, "Maxtor"))
2561 return 1;
2562 if (strcmp(fw, "BANC1G10"))
2563 return 1;
2564
2565 return 0; /* blacklisted */
2566}
2567
2568/**
2569 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2570 * @args: device IDENTIFY data / SCSI command of interest.
2571 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2572 *
2573 * Simulate MODE SENSE commands. Assume this is invoked for direct
2574 * access devices (e.g. disks) only. There should be no block
2575 * descriptor for other device types.
2576 *
2577 * LOCKING:
2578 * spin_lock_irqsave(host lock)
2579 */
2580static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2581{
2582 struct ata_device *dev = args->dev;
2583 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2584 static const u8 sat_blk_desc[] = {
2585 0, 0, 0, 0, /* number of blocks: sat unspecified */
2586 0,
2587 0, 0x2, 0x0 /* block length: 512 bytes */
2588 };
2589 u8 pg, spg;
2590 unsigned int ebd, page_control, six_byte;
2591 u8 dpofua, bp = 0xff;
2592 u16 fp;
2593
2594 VPRINTK("ENTER\n");
2595
2596 six_byte = (scsicmd[0] == MODE_SENSE);
2597 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2598 /*
2599 * LLBA bit in msense(10) ignored (compliant)
2600 */
2601
2602 page_control = scsicmd[2] >> 6;
2603 switch (page_control) {
2604 case 0: /* current */
2605 case 1: /* changeable */
2606 case 2: /* defaults */
2607 break; /* supported */
2608 case 3: /* saved */
2609 goto saving_not_supp;
2610 default:
2611 fp = 2;
2612 bp = 6;
2613 goto invalid_fld;
2614 }
2615
2616 if (six_byte)
2617 p += 4 + (ebd ? 8 : 0);
2618 else
2619 p += 8 + (ebd ? 8 : 0);
2620
2621 pg = scsicmd[2] & 0x3f;
2622 spg = scsicmd[3];
2623 /*
2624 * No mode subpages supported (yet) but asking for _all_
2625 * subpages may be valid
2626 */
2627 if (spg && (spg != ALL_SUB_MPAGES)) {
2628 fp = 3;
2629 goto invalid_fld;
2630 }
2631
2632 switch(pg) {
2633 case RW_RECOVERY_MPAGE:
2634 p += ata_msense_rw_recovery(p, page_control == 1);
2635 break;
2636
2637 case CACHE_MPAGE:
2638 p += ata_msense_caching(args->id, p, page_control == 1);
2639 break;
2640
2641 case CONTROL_MPAGE:
2642 p += ata_msense_control(args->dev, p, page_control == 1);
2643 break;
2644
2645 case ALL_MPAGES:
2646 p += ata_msense_rw_recovery(p, page_control == 1);
2647 p += ata_msense_caching(args->id, p, page_control == 1);
2648 p += ata_msense_control(args->dev, p, page_control == 1);
2649 break;
2650
2651 default: /* invalid page code */
2652 fp = 2;
2653 goto invalid_fld;
2654 }
2655
2656 dpofua = 0;
2657 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2658 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2659 dpofua = 1 << 4;
2660
2661 if (six_byte) {
2662 rbuf[0] = p - rbuf - 1;
2663 rbuf[2] |= dpofua;
2664 if (ebd) {
2665 rbuf[3] = sizeof(sat_blk_desc);
2666 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2667 }
2668 } else {
2669 unsigned int output_len = p - rbuf - 2;
2670
2671 rbuf[0] = output_len >> 8;
2672 rbuf[1] = output_len;
2673 rbuf[3] |= dpofua;
2674 if (ebd) {
2675 rbuf[7] = sizeof(sat_blk_desc);
2676 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2677 }
2678 }
2679 return 0;
2680
2681invalid_fld:
2682 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2683 return 1;
2684
2685saving_not_supp:
2686 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2687 /* "Saving parameters not supported" */
2688 return 1;
2689}
2690
2691/**
2692 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2693 * @args: device IDENTIFY data / SCSI command of interest.
2694 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2695 *
2696 * Simulate READ CAPACITY commands.
2697 *
2698 * LOCKING:
2699 * None.
2700 */
2701static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2702{
2703 struct ata_device *dev = args->dev;
2704 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2705 u32 sector_size; /* physical sector size in bytes */
2706 u8 log2_per_phys;
2707 u16 lowest_aligned;
2708
2709 sector_size = ata_id_logical_sector_size(dev->id);
2710 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2711 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2712
2713 VPRINTK("ENTER\n");
2714
2715 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2716 if (last_lba >= 0xffffffffULL)
2717 last_lba = 0xffffffff;
2718
2719 /* sector count, 32-bit */
2720 rbuf[0] = last_lba >> (8 * 3);
2721 rbuf[1] = last_lba >> (8 * 2);
2722 rbuf[2] = last_lba >> (8 * 1);
2723 rbuf[3] = last_lba;
2724
2725 /* sector size */
2726 rbuf[4] = sector_size >> (8 * 3);
2727 rbuf[5] = sector_size >> (8 * 2);
2728 rbuf[6] = sector_size >> (8 * 1);
2729 rbuf[7] = sector_size;
2730 } else {
2731 /* sector count, 64-bit */
2732 rbuf[0] = last_lba >> (8 * 7);
2733 rbuf[1] = last_lba >> (8 * 6);
2734 rbuf[2] = last_lba >> (8 * 5);
2735 rbuf[3] = last_lba >> (8 * 4);
2736 rbuf[4] = last_lba >> (8 * 3);
2737 rbuf[5] = last_lba >> (8 * 2);
2738 rbuf[6] = last_lba >> (8 * 1);
2739 rbuf[7] = last_lba;
2740
2741 /* sector size */
2742 rbuf[ 8] = sector_size >> (8 * 3);
2743 rbuf[ 9] = sector_size >> (8 * 2);
2744 rbuf[10] = sector_size >> (8 * 1);
2745 rbuf[11] = sector_size;
2746
2747 rbuf[12] = 0;
2748 rbuf[13] = log2_per_phys;
2749 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2750 rbuf[15] = lowest_aligned;
2751
2752 if (ata_id_has_trim(args->id) &&
2753 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2754 rbuf[14] |= 0x80; /* LBPME */
2755
2756 if (ata_id_has_zero_after_trim(args->id) &&
2757 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2758 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2759 rbuf[14] |= 0x40; /* LBPRZ */
2760 }
2761 }
2762 if (ata_id_zoned_cap(args->id) ||
2763 args->dev->class == ATA_DEV_ZAC)
2764 rbuf[12] = (1 << 4); /* RC_BASIS */
2765 }
2766 return 0;
2767}
2768
2769/**
2770 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2771 * @args: device IDENTIFY data / SCSI command of interest.
2772 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2773 *
2774 * Simulate REPORT LUNS command.
2775 *
2776 * LOCKING:
2777 * spin_lock_irqsave(host lock)
2778 */
2779static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2780{
2781 VPRINTK("ENTER\n");
2782 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2783
2784 return 0;
2785}
2786
2787static void atapi_sense_complete(struct ata_queued_cmd *qc)
2788{
2789 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2790 /* FIXME: not quite right; we don't want the
2791 * translation of taskfile registers into
2792 * a sense descriptors, since that's only
2793 * correct for ATA, not ATAPI
2794 */
2795 ata_gen_passthru_sense(qc);
2796 }
2797
2798 ata_qc_done(qc);
2799}
2800
2801/* is it pointless to prefer PIO for "safety reasons"? */
2802static inline int ata_pio_use_silly(struct ata_port *ap)
2803{
2804 return (ap->flags & ATA_FLAG_PIO_DMA);
2805}
2806
2807static void atapi_request_sense(struct ata_queued_cmd *qc)
2808{
2809 struct ata_port *ap = qc->ap;
2810 struct scsi_cmnd *cmd = qc->scsicmd;
2811
2812 DPRINTK("ATAPI request sense\n");
2813
2814 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2815
2816#ifdef CONFIG_ATA_SFF
2817 if (ap->ops->sff_tf_read)
2818 ap->ops->sff_tf_read(ap, &qc->tf);
2819#endif
2820
2821 /* fill these in, for the case where they are -not- overwritten */
2822 cmd->sense_buffer[0] = 0x70;
2823 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2824
2825 ata_qc_reinit(qc);
2826
2827 /* setup sg table and init transfer direction */
2828 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2829 ata_sg_init(qc, &qc->sgent, 1);
2830 qc->dma_dir = DMA_FROM_DEVICE;
2831
2832 memset(&qc->cdb, 0, qc->dev->cdb_len);
2833 qc->cdb[0] = REQUEST_SENSE;
2834 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2835
2836 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2837 qc->tf.command = ATA_CMD_PACKET;
2838
2839 if (ata_pio_use_silly(ap)) {
2840 qc->tf.protocol = ATAPI_PROT_DMA;
2841 qc->tf.feature |= ATAPI_PKT_DMA;
2842 } else {
2843 qc->tf.protocol = ATAPI_PROT_PIO;
2844 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2845 qc->tf.lbah = 0;
2846 }
2847 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2848
2849 qc->complete_fn = atapi_sense_complete;
2850
2851 ata_qc_issue(qc);
2852
2853 DPRINTK("EXIT\n");
2854}
2855
2856/*
2857 * ATAPI devices typically report zero for their SCSI version, and sometimes
2858 * deviate from the spec WRT response data format. If SCSI version is
2859 * reported as zero like normal, then we make the following fixups:
2860 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2861 * modern device.
2862 * 2) Ensure response data format / ATAPI information are always correct.
2863 */
2864static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2865{
2866 u8 buf[4];
2867
2868 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2869 if (buf[2] == 0) {
2870 buf[2] = 0x5;
2871 buf[3] = 0x32;
2872 }
2873 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2874}
2875
2876static void atapi_qc_complete(struct ata_queued_cmd *qc)
2877{
2878 struct scsi_cmnd *cmd = qc->scsicmd;
2879 unsigned int err_mask = qc->err_mask;
2880
2881 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2882
2883 /* handle completion from new EH */
2884 if (unlikely(qc->ap->ops->error_handler &&
2885 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2886
2887 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2888 /* FIXME: not quite right; we don't want the
2889 * translation of taskfile registers into a
2890 * sense descriptors, since that's only
2891 * correct for ATA, not ATAPI
2892 */
2893 ata_gen_passthru_sense(qc);
2894 }
2895
2896 /* SCSI EH automatically locks door if sdev->locked is
2897 * set. Sometimes door lock request continues to
2898 * fail, for example, when no media is present. This
2899 * creates a loop - SCSI EH issues door lock which
2900 * fails and gets invoked again to acquire sense data
2901 * for the failed command.
2902 *
2903 * If door lock fails, always clear sdev->locked to
2904 * avoid this infinite loop.
2905 *
2906 * This may happen before SCSI scan is complete. Make
2907 * sure qc->dev->sdev isn't NULL before dereferencing.
2908 */
2909 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2910 qc->dev->sdev->locked = 0;
2911
2912 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2913 ata_qc_done(qc);
2914 return;
2915 }
2916
2917 /* successful completion or old EH failure path */
2918 if (unlikely(err_mask & AC_ERR_DEV)) {
2919 cmd->result = SAM_STAT_CHECK_CONDITION;
2920 atapi_request_sense(qc);
2921 return;
2922 } else if (unlikely(err_mask)) {
2923 /* FIXME: not quite right; we don't want the
2924 * translation of taskfile registers into
2925 * a sense descriptors, since that's only
2926 * correct for ATA, not ATAPI
2927 */
2928 ata_gen_passthru_sense(qc);
2929 } else {
2930 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2931 atapi_fixup_inquiry(cmd);
2932 cmd->result = SAM_STAT_GOOD;
2933 }
2934
2935 ata_qc_done(qc);
2936}
2937/**
2938 * atapi_xlat - Initialize PACKET taskfile
2939 * @qc: command structure to be initialized
2940 *
2941 * LOCKING:
2942 * spin_lock_irqsave(host lock)
2943 *
2944 * RETURNS:
2945 * Zero on success, non-zero on failure.
2946 */
2947static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2948{
2949 struct scsi_cmnd *scmd = qc->scsicmd;
2950 struct ata_device *dev = qc->dev;
2951 int nodata = (scmd->sc_data_direction == DMA_NONE);
2952 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2953 unsigned int nbytes;
2954
2955 memset(qc->cdb, 0, dev->cdb_len);
2956 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2957
2958 qc->complete_fn = atapi_qc_complete;
2959
2960 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2961 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2962 qc->tf.flags |= ATA_TFLAG_WRITE;
2963 DPRINTK("direction: write\n");
2964 }
2965
2966 qc->tf.command = ATA_CMD_PACKET;
2967 ata_qc_set_pc_nbytes(qc);
2968
2969 /* check whether ATAPI DMA is safe */
2970 if (!nodata && !using_pio && atapi_check_dma(qc))
2971 using_pio = 1;
2972
2973 /* Some controller variants snoop this value for Packet
2974 * transfers to do state machine and FIFO management. Thus we
2975 * want to set it properly, and for DMA where it is
2976 * effectively meaningless.
2977 */
2978 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2979
2980 /* Most ATAPI devices which honor transfer chunk size don't
2981 * behave according to the spec when odd chunk size which
2982 * matches the transfer length is specified. If the number of
2983 * bytes to transfer is 2n+1. According to the spec, what
2984 * should happen is to indicate that 2n+1 is going to be
2985 * transferred and transfer 2n+2 bytes where the last byte is
2986 * padding.
2987 *
2988 * In practice, this doesn't happen. ATAPI devices first
2989 * indicate and transfer 2n bytes and then indicate and
2990 * transfer 2 bytes where the last byte is padding.
2991 *
2992 * This inconsistency confuses several controllers which
2993 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2994 * These controllers use actual number of transferred bytes to
2995 * update DMA poitner and transfer of 4n+2 bytes make those
2996 * controller push DMA pointer by 4n+4 bytes because SATA data
2997 * FISes are aligned to 4 bytes. This causes data corruption
2998 * and buffer overrun.
2999 *
3000 * Always setting nbytes to even number solves this problem
3001 * because then ATAPI devices don't have to split data at 2n
3002 * boundaries.
3003 */
3004 if (nbytes & 0x1)
3005 nbytes++;
3006
3007 qc->tf.lbam = (nbytes & 0xFF);
3008 qc->tf.lbah = (nbytes >> 8);
3009
3010 if (nodata)
3011 qc->tf.protocol = ATAPI_PROT_NODATA;
3012 else if (using_pio)
3013 qc->tf.protocol = ATAPI_PROT_PIO;
3014 else {
3015 /* DMA data xfer */
3016 qc->tf.protocol = ATAPI_PROT_DMA;
3017 qc->tf.feature |= ATAPI_PKT_DMA;
3018
3019 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3020 (scmd->sc_data_direction != DMA_TO_DEVICE))
3021 /* some SATA bridges need us to indicate data xfer direction */
3022 qc->tf.feature |= ATAPI_DMADIR;
3023 }
3024
3025
3026 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3027 as ATAPI tape drives don't get this right otherwise */
3028 return 0;
3029}
3030
3031static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3032{
3033 if (!sata_pmp_attached(ap)) {
3034 if (likely(devno >= 0 &&
3035 devno < ata_link_max_devices(&ap->link)))
3036 return &ap->link.device[devno];
3037 } else {
3038 if (likely(devno >= 0 &&
3039 devno < ap->nr_pmp_links))
3040 return &ap->pmp_link[devno].device[0];
3041 }
3042
3043 return NULL;
3044}
3045
3046static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3047 const struct scsi_device *scsidev)
3048{
3049 int devno;
3050
3051 /* skip commands not addressed to targets we simulate */
3052 if (!sata_pmp_attached(ap)) {
3053 if (unlikely(scsidev->channel || scsidev->lun))
3054 return NULL;
3055 devno = scsidev->id;
3056 } else {
3057 if (unlikely(scsidev->id || scsidev->lun))
3058 return NULL;
3059 devno = scsidev->channel;
3060 }
3061
3062 return ata_find_dev(ap, devno);
3063}
3064
3065/**
3066 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3067 * @ap: ATA port to which the device is attached
3068 * @scsidev: SCSI device from which we derive the ATA device
3069 *
3070 * Given various information provided in struct scsi_cmnd,
3071 * map that onto an ATA bus, and using that mapping
3072 * determine which ata_device is associated with the
3073 * SCSI command to be sent.
3074 *
3075 * LOCKING:
3076 * spin_lock_irqsave(host lock)
3077 *
3078 * RETURNS:
3079 * Associated ATA device, or %NULL if not found.
3080 */
3081static struct ata_device *
3082ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3083{
3084 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3085
3086 if (unlikely(!dev || !ata_dev_enabled(dev)))
3087 return NULL;
3088
3089 return dev;
3090}
3091
3092/*
3093 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3094 * @byte1: Byte 1 from pass-thru CDB.
3095 *
3096 * RETURNS:
3097 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3098 */
3099static u8
3100ata_scsi_map_proto(u8 byte1)
3101{
3102 switch((byte1 & 0x1e) >> 1) {
3103 case 3: /* Non-data */
3104 return ATA_PROT_NODATA;
3105
3106 case 6: /* DMA */
3107 case 10: /* UDMA Data-in */
3108 case 11: /* UDMA Data-Out */
3109 return ATA_PROT_DMA;
3110
3111 case 4: /* PIO Data-in */
3112 case 5: /* PIO Data-out */
3113 return ATA_PROT_PIO;
3114
3115 case 12: /* FPDMA */
3116 return ATA_PROT_NCQ;
3117
3118 case 0: /* Hard Reset */
3119 case 1: /* SRST */
3120 case 8: /* Device Diagnostic */
3121 case 9: /* Device Reset */
3122 case 7: /* DMA Queued */
3123 case 15: /* Return Response Info */
3124 default: /* Reserved */
3125 break;
3126 }
3127
3128 return ATA_PROT_UNKNOWN;
3129}
3130
3131/**
3132 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3133 * @qc: command structure to be initialized
3134 *
3135 * Handles either 12, 16, or 32-byte versions of the CDB.
3136 *
3137 * RETURNS:
3138 * Zero on success, non-zero on failure.
3139 */
3140static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3141{
3142 struct ata_taskfile *tf = &(qc->tf);
3143 struct scsi_cmnd *scmd = qc->scsicmd;
3144 struct ata_device *dev = qc->dev;
3145 const u8 *cdb = scmd->cmnd;
3146 u16 fp;
3147 u16 cdb_offset = 0;
3148
3149 /* 7Fh variable length cmd means a ata pass-thru(32) */
3150 if (cdb[0] == VARIABLE_LENGTH_CMD)
3151 cdb_offset = 9;
3152
3153 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3154 if (tf->protocol == ATA_PROT_UNKNOWN) {
3155 fp = 1;
3156 goto invalid_fld;
3157 }
3158
3159 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0)
3160 tf->protocol = ATA_PROT_NCQ_NODATA;
3161
3162 /* enable LBA */
3163 tf->flags |= ATA_TFLAG_LBA;
3164
3165 /*
3166 * 12 and 16 byte CDBs use different offsets to
3167 * provide the various register values.
3168 */
3169 if (cdb[0] == ATA_16) {
3170 /*
3171 * 16-byte CDB - may contain extended commands.
3172 *
3173 * If that is the case, copy the upper byte register values.
3174 */
3175 if (cdb[1] & 0x01) {
3176 tf->hob_feature = cdb[3];
3177 tf->hob_nsect = cdb[5];
3178 tf->hob_lbal = cdb[7];
3179 tf->hob_lbam = cdb[9];
3180 tf->hob_lbah = cdb[11];
3181 tf->flags |= ATA_TFLAG_LBA48;
3182 } else
3183 tf->flags &= ~ATA_TFLAG_LBA48;
3184
3185 /*
3186 * Always copy low byte, device and command registers.
3187 */
3188 tf->feature = cdb[4];
3189 tf->nsect = cdb[6];
3190 tf->lbal = cdb[8];
3191 tf->lbam = cdb[10];
3192 tf->lbah = cdb[12];
3193 tf->device = cdb[13];
3194 tf->command = cdb[14];
3195 } else if (cdb[0] == ATA_12) {
3196 /*
3197 * 12-byte CDB - incapable of extended commands.
3198 */
3199 tf->flags &= ~ATA_TFLAG_LBA48;
3200
3201 tf->feature = cdb[3];
3202 tf->nsect = cdb[4];
3203 tf->lbal = cdb[5];
3204 tf->lbam = cdb[6];
3205 tf->lbah = cdb[7];
3206 tf->device = cdb[8];
3207 tf->command = cdb[9];
3208 } else {
3209 /*
3210 * 32-byte CDB - may contain extended command fields.
3211 *
3212 * If that is the case, copy the upper byte register values.
3213 */
3214 if (cdb[10] & 0x01) {
3215 tf->hob_feature = cdb[20];
3216 tf->hob_nsect = cdb[22];
3217 tf->hob_lbal = cdb[16];
3218 tf->hob_lbam = cdb[15];
3219 tf->hob_lbah = cdb[14];
3220 tf->flags |= ATA_TFLAG_LBA48;
3221 } else
3222 tf->flags &= ~ATA_TFLAG_LBA48;
3223
3224 tf->feature = cdb[21];
3225 tf->nsect = cdb[23];
3226 tf->lbal = cdb[19];
3227 tf->lbam = cdb[18];
3228 tf->lbah = cdb[17];
3229 tf->device = cdb[24];
3230 tf->command = cdb[25];
3231 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3232 }
3233
3234 /* For NCQ commands copy the tag value */
3235 if (ata_is_ncq(tf->protocol))
3236 tf->nsect = qc->tag << 3;
3237
3238 /* enforce correct master/slave bit */
3239 tf->device = dev->devno ?
3240 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3241
3242 switch (tf->command) {
3243 /* READ/WRITE LONG use a non-standard sect_size */
3244 case ATA_CMD_READ_LONG:
3245 case ATA_CMD_READ_LONG_ONCE:
3246 case ATA_CMD_WRITE_LONG:
3247 case ATA_CMD_WRITE_LONG_ONCE:
3248 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3249 fp = 1;
3250 goto invalid_fld;
3251 }
3252 qc->sect_size = scsi_bufflen(scmd);
3253 break;
3254
3255 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3256 case ATA_CMD_CFA_WRITE_NE:
3257 case ATA_CMD_CFA_TRANS_SECT:
3258 case ATA_CMD_CFA_WRITE_MULT_NE:
3259 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3260 case ATA_CMD_READ:
3261 case ATA_CMD_READ_EXT:
3262 case ATA_CMD_READ_QUEUED:
3263 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3264 case ATA_CMD_FPDMA_READ:
3265 case ATA_CMD_READ_MULTI:
3266 case ATA_CMD_READ_MULTI_EXT:
3267 case ATA_CMD_PIO_READ:
3268 case ATA_CMD_PIO_READ_EXT:
3269 case ATA_CMD_READ_STREAM_DMA_EXT:
3270 case ATA_CMD_READ_STREAM_EXT:
3271 case ATA_CMD_VERIFY:
3272 case ATA_CMD_VERIFY_EXT:
3273 case ATA_CMD_WRITE:
3274 case ATA_CMD_WRITE_EXT:
3275 case ATA_CMD_WRITE_FUA_EXT:
3276 case ATA_CMD_WRITE_QUEUED:
3277 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3278 case ATA_CMD_FPDMA_WRITE:
3279 case ATA_CMD_WRITE_MULTI:
3280 case ATA_CMD_WRITE_MULTI_EXT:
3281 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3282 case ATA_CMD_PIO_WRITE:
3283 case ATA_CMD_PIO_WRITE_EXT:
3284 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3285 case ATA_CMD_WRITE_STREAM_EXT:
3286 qc->sect_size = scmd->device->sector_size;
3287 break;
3288
3289 /* Everything else uses 512 byte "sectors" */
3290 default:
3291 qc->sect_size = ATA_SECT_SIZE;
3292 }
3293
3294 /*
3295 * Set flags so that all registers will be written, pass on
3296 * write indication (used for PIO/DMA setup), result TF is
3297 * copied back and we don't whine too much about its failure.
3298 */
3299 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3300 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3301 tf->flags |= ATA_TFLAG_WRITE;
3302
3303 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3304
3305 /*
3306 * Set transfer length.
3307 *
3308 * TODO: find out if we need to do more here to
3309 * cover scatter/gather case.
3310 */
3311 ata_qc_set_pc_nbytes(qc);
3312
3313 /* We may not issue DMA commands if no DMA mode is set */
3314 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3315 fp = 1;
3316 goto invalid_fld;
3317 }
3318
3319 /* We may not issue NCQ commands to devices not supporting NCQ */
3320 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3321 fp = 1;
3322 goto invalid_fld;
3323 }
3324
3325 /* sanity check for pio multi commands */
3326 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3327 fp = 1;
3328 goto invalid_fld;
3329 }
3330
3331 if (is_multi_taskfile(tf)) {
3332 unsigned int multi_count = 1 << (cdb[1] >> 5);
3333
3334 /* compare the passed through multi_count
3335 * with the cached multi_count of libata
3336 */
3337 if (multi_count != dev->multi_count)
3338 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3339 multi_count);
3340 }
3341
3342 /*
3343 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3344 * SET_FEATURES - XFER MODE must be preceded/succeeded
3345 * by an update to hardware-specific registers for each
3346 * controller (i.e. the reason for ->set_piomode(),
3347 * ->set_dmamode(), and ->post_set_mode() hooks).
3348 */
3349 if (tf->command == ATA_CMD_SET_FEATURES &&
3350 tf->feature == SETFEATURES_XFER) {
3351 fp = (cdb[0] == ATA_16) ? 4 : 3;
3352 goto invalid_fld;
3353 }
3354
3355 /*
3356 * Filter TPM commands by default. These provide an
3357 * essentially uncontrolled encrypted "back door" between
3358 * applications and the disk. Set libata.allow_tpm=1 if you
3359 * have a real reason for wanting to use them. This ensures
3360 * that installed software cannot easily mess stuff up without
3361 * user intent. DVR type users will probably ship with this enabled
3362 * for movie content management.
3363 *
3364 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3365 * for this and should do in future but that it is not sufficient as
3366 * DCS is an optional feature set. Thus we also do the software filter
3367 * so that we comply with the TC consortium stated goal that the user
3368 * can turn off TC features of their system.
3369 */
3370 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3371 fp = (cdb[0] == ATA_16) ? 14 : 9;
3372 goto invalid_fld;
3373 }
3374
3375 return 0;
3376
3377 invalid_fld:
3378 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3379 return 1;
3380}
3381
3382/**
3383 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3384 * @cmd: SCSI command being translated
3385 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3386 * @sector: Starting sector
3387 * @count: Total Range of request in logical sectors
3388 *
3389 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3390 * descriptor.
3391 *
3392 * Upto 64 entries of the format:
3393 * 63:48 Range Length
3394 * 47:0 LBA
3395 *
3396 * Range Length of 0 is ignored.
3397 * LBA's should be sorted order and not overlap.
3398 *
3399 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3400 *
3401 * Return: Number of bytes copied into sglist.
3402 */
3403static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3404 u64 sector, u32 count)
3405{
3406 struct scsi_device *sdp = cmd->device;
3407 size_t len = sdp->sector_size;
3408 size_t r;
3409 __le64 *buf;
3410 u32 i = 0;
3411 unsigned long flags;
3412
3413 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3414
3415 if (len > ATA_SCSI_RBUF_SIZE)
3416 len = ATA_SCSI_RBUF_SIZE;
3417
3418 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3419 buf = ((void *)ata_scsi_rbuf);
3420 memset(buf, 0, len);
3421 while (i < trmax) {
3422 u64 entry = sector |
3423 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3424 buf[i++] = __cpu_to_le64(entry);
3425 if (count <= 0xffff)
3426 break;
3427 count -= 0xffff;
3428 sector += 0xffff;
3429 }
3430 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3431 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3432
3433 return r;
3434}
3435
3436/**
3437 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3438 * @qc: Command to be translated
3439 *
3440 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3441 * an SCT Write Same command.
3442 * Based on WRITE SAME has the UNMAP flag:
3443 *
3444 * - When set translate to DSM TRIM
3445 * - When clear translate to SCT Write Same
3446 */
3447static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3448{
3449 struct ata_taskfile *tf = &qc->tf;
3450 struct scsi_cmnd *scmd = qc->scsicmd;
3451 struct scsi_device *sdp = scmd->device;
3452 size_t len = sdp->sector_size;
3453 struct ata_device *dev = qc->dev;
3454 const u8 *cdb = scmd->cmnd;
3455 u64 block;
3456 u32 n_block;
3457 const u32 trmax = len >> 3;
3458 u32 size;
3459 u16 fp;
3460 u8 bp = 0xff;
3461 u8 unmap = cdb[1] & 0x8;
3462
3463 /* we may not issue DMA commands if no DMA mode is set */
3464 if (unlikely(!dev->dma_mode))
3465 goto invalid_opcode;
3466
3467 /*
3468 * We only allow sending this command through the block layer,
3469 * as it modifies the DATA OUT buffer, which would corrupt user
3470 * memory for SG_IO commands.
3471 */
3472 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3473 goto invalid_opcode;
3474
3475 if (unlikely(scmd->cmd_len < 16)) {
3476 fp = 15;
3477 goto invalid_fld;
3478 }
3479 scsi_16_lba_len(cdb, &block, &n_block);
3480
3481 if (!unmap ||
3482 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3483 !ata_id_has_trim(dev->id)) {
3484 fp = 1;
3485 bp = 3;
3486 goto invalid_fld;
3487 }
3488 /* If the request is too large the cmd is invalid */
3489 if (n_block > 0xffff * trmax) {
3490 fp = 2;
3491 goto invalid_fld;
3492 }
3493
3494 /*
3495 * WRITE SAME always has a sector sized buffer as payload, this
3496 * should never be a multiple entry S/G list.
3497 */
3498 if (!scsi_sg_count(scmd))
3499 goto invalid_param_len;
3500
3501 /*
3502 * size must match sector size in bytes
3503 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3504 * is defined as number of 512 byte blocks to be transferred.
3505 */
3506
3507 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3508 if (size != len)
3509 goto invalid_param_len;
3510
3511 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3512 /* Newer devices support queued TRIM commands */
3513 tf->protocol = ATA_PROT_NCQ;
3514 tf->command = ATA_CMD_FPDMA_SEND;
3515 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3516 tf->nsect = qc->tag << 3;
3517 tf->hob_feature = (size / 512) >> 8;
3518 tf->feature = size / 512;
3519
3520 tf->auxiliary = 1;
3521 } else {
3522 tf->protocol = ATA_PROT_DMA;
3523 tf->hob_feature = 0;
3524 tf->feature = ATA_DSM_TRIM;
3525 tf->hob_nsect = (size / 512) >> 8;
3526 tf->nsect = size / 512;
3527 tf->command = ATA_CMD_DSM;
3528 }
3529
3530 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3531 ATA_TFLAG_WRITE;
3532
3533 ata_qc_set_pc_nbytes(qc);
3534
3535 return 0;
3536
3537invalid_fld:
3538 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3539 return 1;
3540invalid_param_len:
3541 /* "Parameter list length error" */
3542 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3543 return 1;
3544invalid_opcode:
3545 /* "Invalid command operation code" */
3546 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3547 return 1;
3548}
3549
3550/**
3551 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3552 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3553 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3554 *
3555 * Yields a subset to satisfy scsi_report_opcode()
3556 *
3557 * LOCKING:
3558 * spin_lock_irqsave(host lock)
3559 */
3560static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3561{
3562 struct ata_device *dev = args->dev;
3563 u8 *cdb = args->cmd->cmnd;
3564 u8 supported = 0;
3565 unsigned int err = 0;
3566
3567 if (cdb[2] != 1) {
3568 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3569 err = 2;
3570 goto out;
3571 }
3572 switch (cdb[3]) {
3573 case INQUIRY:
3574 case MODE_SENSE:
3575 case MODE_SENSE_10:
3576 case READ_CAPACITY:
3577 case SERVICE_ACTION_IN_16:
3578 case REPORT_LUNS:
3579 case REQUEST_SENSE:
3580 case SYNCHRONIZE_CACHE:
3581 case REZERO_UNIT:
3582 case SEEK_6:
3583 case SEEK_10:
3584 case TEST_UNIT_READY:
3585 case SEND_DIAGNOSTIC:
3586 case MAINTENANCE_IN:
3587 case READ_6:
3588 case READ_10:
3589 case READ_16:
3590 case WRITE_6:
3591 case WRITE_10:
3592 case WRITE_16:
3593 case ATA_12:
3594 case ATA_16:
3595 case VERIFY:
3596 case VERIFY_16:
3597 case MODE_SELECT:
3598 case MODE_SELECT_10:
3599 case START_STOP:
3600 supported = 3;
3601 break;
3602 case ZBC_IN:
3603 case ZBC_OUT:
3604 if (ata_id_zoned_cap(dev->id) ||
3605 dev->class == ATA_DEV_ZAC)
3606 supported = 3;
3607 break;
3608 case SECURITY_PROTOCOL_IN:
3609 case SECURITY_PROTOCOL_OUT:
3610 if (dev->flags & ATA_DFLAG_TRUSTED)
3611 supported = 3;
3612 break;
3613 default:
3614 break;
3615 }
3616out:
3617 rbuf[1] = supported; /* supported */
3618 return err;
3619}
3620
3621/**
3622 * ata_scsi_report_zones_complete - convert ATA output
3623 * @qc: command structure returning the data
3624 *
3625 * Convert T-13 little-endian field representation into
3626 * T-10 big-endian field representation.
3627 * What a mess.
3628 */
3629static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3630{
3631 struct scsi_cmnd *scmd = qc->scsicmd;
3632 struct sg_mapping_iter miter;
3633 unsigned long flags;
3634 unsigned int bytes = 0;
3635
3636 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3637 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3638
3639 local_irq_save(flags);
3640 while (sg_miter_next(&miter)) {
3641 unsigned int offset = 0;
3642
3643 if (bytes == 0) {
3644 char *hdr;
3645 u32 list_length;
3646 u64 max_lba, opt_lba;
3647 u16 same;
3648
3649 /* Swizzle header */
3650 hdr = miter.addr;
3651 list_length = get_unaligned_le32(&hdr[0]);
3652 same = get_unaligned_le16(&hdr[4]);
3653 max_lba = get_unaligned_le64(&hdr[8]);
3654 opt_lba = get_unaligned_le64(&hdr[16]);
3655 put_unaligned_be32(list_length, &hdr[0]);
3656 hdr[4] = same & 0xf;
3657 put_unaligned_be64(max_lba, &hdr[8]);
3658 put_unaligned_be64(opt_lba, &hdr[16]);
3659 offset += 64;
3660 bytes += 64;
3661 }
3662 while (offset < miter.length) {
3663 char *rec;
3664 u8 cond, type, non_seq, reset;
3665 u64 size, start, wp;
3666
3667 /* Swizzle zone descriptor */
3668 rec = miter.addr + offset;
3669 type = rec[0] & 0xf;
3670 cond = (rec[1] >> 4) & 0xf;
3671 non_seq = (rec[1] & 2);
3672 reset = (rec[1] & 1);
3673 size = get_unaligned_le64(&rec[8]);
3674 start = get_unaligned_le64(&rec[16]);
3675 wp = get_unaligned_le64(&rec[24]);
3676 rec[0] = type;
3677 rec[1] = (cond << 4) | non_seq | reset;
3678 put_unaligned_be64(size, &rec[8]);
3679 put_unaligned_be64(start, &rec[16]);
3680 put_unaligned_be64(wp, &rec[24]);
3681 WARN_ON(offset + 64 > miter.length);
3682 offset += 64;
3683 bytes += 64;
3684 }
3685 }
3686 sg_miter_stop(&miter);
3687 local_irq_restore(flags);
3688
3689 ata_scsi_qc_complete(qc);
3690}
3691
3692static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3693{
3694 struct ata_taskfile *tf = &qc->tf;
3695 struct scsi_cmnd *scmd = qc->scsicmd;
3696 const u8 *cdb = scmd->cmnd;
3697 u16 sect, fp = (u16)-1;
3698 u8 sa, options, bp = 0xff;
3699 u64 block;
3700 u32 n_block;
3701
3702 if (unlikely(scmd->cmd_len < 16)) {
3703 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3704 scmd->cmd_len);
3705 fp = 15;
3706 goto invalid_fld;
3707 }
3708 scsi_16_lba_len(cdb, &block, &n_block);
3709 if (n_block != scsi_bufflen(scmd)) {
3710 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3711 n_block, scsi_bufflen(scmd));
3712 goto invalid_param_len;
3713 }
3714 sa = cdb[1] & 0x1f;
3715 if (sa != ZI_REPORT_ZONES) {
3716 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3717 fp = 1;
3718 goto invalid_fld;
3719 }
3720 /*
3721 * ZAC allows only for transfers in 512 byte blocks,
3722 * and uses a 16 bit value for the transfer count.
3723 */
3724 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3725 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3726 goto invalid_param_len;
3727 }
3728 sect = n_block / 512;
3729 options = cdb[14] & 0xbf;
3730
3731 if (ata_ncq_enabled(qc->dev) &&
3732 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3733 tf->protocol = ATA_PROT_NCQ;
3734 tf->command = ATA_CMD_FPDMA_RECV;
3735 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3736 tf->nsect = qc->tag << 3;
3737 tf->feature = sect & 0xff;
3738 tf->hob_feature = (sect >> 8) & 0xff;
3739 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3740 } else {
3741 tf->command = ATA_CMD_ZAC_MGMT_IN;
3742 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3743 tf->protocol = ATA_PROT_DMA;
3744 tf->hob_feature = options;
3745 tf->hob_nsect = (sect >> 8) & 0xff;
3746 tf->nsect = sect & 0xff;
3747 }
3748 tf->device = ATA_LBA;
3749 tf->lbah = (block >> 16) & 0xff;
3750 tf->lbam = (block >> 8) & 0xff;
3751 tf->lbal = block & 0xff;
3752 tf->hob_lbah = (block >> 40) & 0xff;
3753 tf->hob_lbam = (block >> 32) & 0xff;
3754 tf->hob_lbal = (block >> 24) & 0xff;
3755
3756 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3757 qc->flags |= ATA_QCFLAG_RESULT_TF;
3758
3759 ata_qc_set_pc_nbytes(qc);
3760
3761 qc->complete_fn = ata_scsi_report_zones_complete;
3762
3763 return 0;
3764
3765invalid_fld:
3766 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3767 return 1;
3768
3769invalid_param_len:
3770 /* "Parameter list length error" */
3771 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3772 return 1;
3773}
3774
3775static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3776{
3777 struct ata_taskfile *tf = &qc->tf;
3778 struct scsi_cmnd *scmd = qc->scsicmd;
3779 struct ata_device *dev = qc->dev;
3780 const u8 *cdb = scmd->cmnd;
3781 u8 all, sa;
3782 u64 block;
3783 u32 n_block;
3784 u16 fp = (u16)-1;
3785
3786 if (unlikely(scmd->cmd_len < 16)) {
3787 fp = 15;
3788 goto invalid_fld;
3789 }
3790
3791 sa = cdb[1] & 0x1f;
3792 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3793 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3794 fp = 1;
3795 goto invalid_fld;
3796 }
3797
3798 scsi_16_lba_len(cdb, &block, &n_block);
3799 if (n_block) {
3800 /*
3801 * ZAC MANAGEMENT OUT doesn't define any length
3802 */
3803 goto invalid_param_len;
3804 }
3805 if (block > dev->n_sectors)
3806 goto out_of_range;
3807
3808 all = cdb[14] & 0x1;
3809
3810 if (ata_ncq_enabled(qc->dev) &&
3811 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3812 tf->protocol = ATA_PROT_NCQ_NODATA;
3813 tf->command = ATA_CMD_NCQ_NON_DATA;
3814 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3815 tf->nsect = qc->tag << 3;
3816 tf->auxiliary = sa | ((u16)all << 8);
3817 } else {
3818 tf->protocol = ATA_PROT_NODATA;
3819 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3820 tf->feature = sa;
3821 tf->hob_feature = all;
3822 }
3823 tf->lbah = (block >> 16) & 0xff;
3824 tf->lbam = (block >> 8) & 0xff;
3825 tf->lbal = block & 0xff;
3826 tf->hob_lbah = (block >> 40) & 0xff;
3827 tf->hob_lbam = (block >> 32) & 0xff;
3828 tf->hob_lbal = (block >> 24) & 0xff;
3829 tf->device = ATA_LBA;
3830 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3831
3832 return 0;
3833
3834 invalid_fld:
3835 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3836 return 1;
3837 out_of_range:
3838 /* "Logical Block Address out of range" */
3839 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3840 return 1;
3841invalid_param_len:
3842 /* "Parameter list length error" */
3843 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3844 return 1;
3845}
3846
3847/**
3848 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3849 * @qc: Storage for translated ATA taskfile
3850 * @buf: input buffer
3851 * @len: number of valid bytes in the input buffer
3852 * @fp: out parameter for the failed field on error
3853 *
3854 * Prepare a taskfile to modify caching information for the device.
3855 *
3856 * LOCKING:
3857 * None.
3858 */
3859static int ata_mselect_caching(struct ata_queued_cmd *qc,
3860 const u8 *buf, int len, u16 *fp)
3861{
3862 struct ata_taskfile *tf = &qc->tf;
3863 struct ata_device *dev = qc->dev;
3864 u8 mpage[CACHE_MPAGE_LEN];
3865 u8 wce;
3866 int i;
3867
3868 /*
3869 * The first two bytes of def_cache_mpage are a header, so offsets
3870 * in mpage are off by 2 compared to buf. Same for len.
3871 */
3872
3873 if (len != CACHE_MPAGE_LEN - 2) {
3874 if (len < CACHE_MPAGE_LEN - 2)
3875 *fp = len;
3876 else
3877 *fp = CACHE_MPAGE_LEN - 2;
3878 return -EINVAL;
3879 }
3880
3881 wce = buf[0] & (1 << 2);
3882
3883 /*
3884 * Check that read-only bits are not modified.
3885 */
3886 ata_msense_caching(dev->id, mpage, false);
3887 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3888 if (i == 0)
3889 continue;
3890 if (mpage[i + 2] != buf[i]) {
3891 *fp = i;
3892 return -EINVAL;
3893 }
3894 }
3895
3896 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3897 tf->protocol = ATA_PROT_NODATA;
3898 tf->nsect = 0;
3899 tf->command = ATA_CMD_SET_FEATURES;
3900 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3901 return 0;
3902}
3903
3904/**
3905 * ata_mselect_control - Simulate MODE SELECT for control page
3906 * @qc: Storage for translated ATA taskfile
3907 * @buf: input buffer
3908 * @len: number of valid bytes in the input buffer
3909 * @fp: out parameter for the failed field on error
3910 *
3911 * Prepare a taskfile to modify caching information for the device.
3912 *
3913 * LOCKING:
3914 * None.
3915 */
3916static int ata_mselect_control(struct ata_queued_cmd *qc,
3917 const u8 *buf, int len, u16 *fp)
3918{
3919 struct ata_device *dev = qc->dev;
3920 u8 mpage[CONTROL_MPAGE_LEN];
3921 u8 d_sense;
3922 int i;
3923
3924 /*
3925 * The first two bytes of def_control_mpage are a header, so offsets
3926 * in mpage are off by 2 compared to buf. Same for len.
3927 */
3928
3929 if (len != CONTROL_MPAGE_LEN - 2) {
3930 if (len < CONTROL_MPAGE_LEN - 2)
3931 *fp = len;
3932 else
3933 *fp = CONTROL_MPAGE_LEN - 2;
3934 return -EINVAL;
3935 }
3936
3937 d_sense = buf[0] & (1 << 2);
3938
3939 /*
3940 * Check that read-only bits are not modified.
3941 */
3942 ata_msense_control(dev, mpage, false);
3943 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3944 if (i == 0)
3945 continue;
3946 if (mpage[2 + i] != buf[i]) {
3947 *fp = i;
3948 return -EINVAL;
3949 }
3950 }
3951 if (d_sense & (1 << 2))
3952 dev->flags |= ATA_DFLAG_D_SENSE;
3953 else
3954 dev->flags &= ~ATA_DFLAG_D_SENSE;
3955 return 0;
3956}
3957
3958/**
3959 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3960 * @qc: Storage for translated ATA taskfile
3961 *
3962 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3963 * Assume this is invoked for direct access devices (e.g. disks) only.
3964 * There should be no block descriptor for other device types.
3965 *
3966 * LOCKING:
3967 * spin_lock_irqsave(host lock)
3968 */
3969static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3970{
3971 struct scsi_cmnd *scmd = qc->scsicmd;
3972 const u8 *cdb = scmd->cmnd;
3973 const u8 *p;
3974 u8 pg, spg;
3975 unsigned six_byte, pg_len, hdr_len, bd_len;
3976 int len;
3977 u16 fp = (u16)-1;
3978 u8 bp = 0xff;
3979
3980 VPRINTK("ENTER\n");
3981
3982 six_byte = (cdb[0] == MODE_SELECT);
3983 if (six_byte) {
3984 if (scmd->cmd_len < 5) {
3985 fp = 4;
3986 goto invalid_fld;
3987 }
3988
3989 len = cdb[4];
3990 hdr_len = 4;
3991 } else {
3992 if (scmd->cmd_len < 9) {
3993 fp = 8;
3994 goto invalid_fld;
3995 }
3996
3997 len = (cdb[7] << 8) + cdb[8];
3998 hdr_len = 8;
3999 }
4000
4001 /* We only support PF=1, SP=0. */
4002 if ((cdb[1] & 0x11) != 0x10) {
4003 fp = 1;
4004 bp = (cdb[1] & 0x01) ? 1 : 5;
4005 goto invalid_fld;
4006 }
4007
4008 /* Test early for possible overrun. */
4009 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4010 goto invalid_param_len;
4011
4012 p = page_address(sg_page(scsi_sglist(scmd)));
4013
4014 /* Move past header and block descriptors. */
4015 if (len < hdr_len)
4016 goto invalid_param_len;
4017
4018 if (six_byte)
4019 bd_len = p[3];
4020 else
4021 bd_len = (p[6] << 8) + p[7];
4022
4023 len -= hdr_len;
4024 p += hdr_len;
4025 if (len < bd_len)
4026 goto invalid_param_len;
4027 if (bd_len != 0 && bd_len != 8) {
4028 fp = (six_byte) ? 3 : 6;
4029 fp += bd_len + hdr_len;
4030 goto invalid_param;
4031 }
4032
4033 len -= bd_len;
4034 p += bd_len;
4035 if (len == 0)
4036 goto skip;
4037
4038 /* Parse both possible formats for the mode page headers. */
4039 pg = p[0] & 0x3f;
4040 if (p[0] & 0x40) {
4041 if (len < 4)
4042 goto invalid_param_len;
4043
4044 spg = p[1];
4045 pg_len = (p[2] << 8) | p[3];
4046 p += 4;
4047 len -= 4;
4048 } else {
4049 if (len < 2)
4050 goto invalid_param_len;
4051
4052 spg = 0;
4053 pg_len = p[1];
4054 p += 2;
4055 len -= 2;
4056 }
4057
4058 /*
4059 * No mode subpages supported (yet) but asking for _all_
4060 * subpages may be valid
4061 */
4062 if (spg && (spg != ALL_SUB_MPAGES)) {
4063 fp = (p[0] & 0x40) ? 1 : 0;
4064 fp += hdr_len + bd_len;
4065 goto invalid_param;
4066 }
4067 if (pg_len > len)
4068 goto invalid_param_len;
4069
4070 switch (pg) {
4071 case CACHE_MPAGE:
4072 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4073 fp += hdr_len + bd_len;
4074 goto invalid_param;
4075 }
4076 break;
4077 case CONTROL_MPAGE:
4078 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4079 fp += hdr_len + bd_len;
4080 goto invalid_param;
4081 } else {
4082 goto skip; /* No ATA command to send */
4083 }
4084 break;
4085 default: /* invalid page code */
4086 fp = bd_len + hdr_len;
4087 goto invalid_param;
4088 }
4089
4090 /*
4091 * Only one page has changeable data, so we only support setting one
4092 * page at a time.
4093 */
4094 if (len > pg_len)
4095 goto invalid_param;
4096
4097 return 0;
4098
4099 invalid_fld:
4100 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4101 return 1;
4102
4103 invalid_param:
4104 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4105 return 1;
4106
4107 invalid_param_len:
4108 /* "Parameter list length error" */
4109 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4110 return 1;
4111
4112 skip:
4113 scmd->result = SAM_STAT_GOOD;
4114 return 1;
4115}
4116
4117static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
4118{
4119 if (len == 0)
4120 return ATA_CMD_TRUSTED_NONDATA;
4121 else if (send)
4122 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
4123 else
4124 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
4125}
4126
4127static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
4128{
4129 struct scsi_cmnd *scmd = qc->scsicmd;
4130 const u8 *cdb = scmd->cmnd;
4131 struct ata_taskfile *tf = &qc->tf;
4132 u8 secp = cdb[1];
4133 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
4134 u16 spsp = get_unaligned_be16(&cdb[2]);
4135 u32 len = get_unaligned_be32(&cdb[6]);
4136 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4137
4138 /*
4139 * We don't support the ATA "security" protocol.
4140 */
4141 if (secp == 0xef) {
4142 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4143 return 1;
4144 }
4145
4146 if (cdb[4] & 7) { /* INC_512 */
4147 if (len > 0xffff) {
4148 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4149 return 1;
4150 }
4151 } else {
4152 if (len > 0x01fffe00) {
4153 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4154 return 1;
4155 }
4156
4157 /* convert to the sector-based ATA addressing */
4158 len = (len + 511) / 512;
4159 }
4160
4161 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4162 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4163 if (send)
4164 tf->flags |= ATA_TFLAG_WRITE;
4165 tf->command = ata_scsi_trusted_op(len, send, dma);
4166 tf->feature = secp;
4167 tf->lbam = spsp & 0xff;
4168 tf->lbah = spsp >> 8;
4169
4170 if (len) {
4171 tf->nsect = len & 0xff;
4172 tf->lbal = len >> 8;
4173 } else {
4174 if (!send)
4175 tf->lbah = (1 << 7);
4176 }
4177
4178 ata_qc_set_pc_nbytes(qc);
4179 return 0;
4180}
4181
4182/**
4183 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4184 * @qc: Command to be translated
4185 *
4186 * Translate a SCSI variable length CDB to specified commands.
4187 * It checks a service action value in CDB to call corresponding handler.
4188 *
4189 * RETURNS:
4190 * Zero on success, non-zero on failure
4191 *
4192 */
4193static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4194{
4195 struct scsi_cmnd *scmd = qc->scsicmd;
4196 const u8 *cdb = scmd->cmnd;
4197 const u16 sa = get_unaligned_be16(&cdb[8]);
4198
4199 /*
4200 * if service action represents a ata pass-thru(32) command,
4201 * then pass it to ata_scsi_pass_thru handler.
4202 */
4203 if (sa == ATA_32)
4204 return ata_scsi_pass_thru(qc);
4205
4206 /* unsupported service action */
4207 return 1;
4208}
4209
4210/**
4211 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4212 * @dev: ATA device
4213 * @cmd: SCSI command opcode to consider
4214 *
4215 * Look up the SCSI command given, and determine whether the
4216 * SCSI command is to be translated or simulated.
4217 *
4218 * RETURNS:
4219 * Pointer to translation function if possible, %NULL if not.
4220 */
4221
4222static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4223{
4224 switch (cmd) {
4225 case READ_6:
4226 case READ_10:
4227 case READ_16:
4228
4229 case WRITE_6:
4230 case WRITE_10:
4231 case WRITE_16:
4232 return ata_scsi_rw_xlat;
4233
4234 case WRITE_SAME_16:
4235 return ata_scsi_write_same_xlat;
4236
4237 case SYNCHRONIZE_CACHE:
4238 if (ata_try_flush_cache(dev))
4239 return ata_scsi_flush_xlat;
4240 break;
4241
4242 case VERIFY:
4243 case VERIFY_16:
4244 return ata_scsi_verify_xlat;
4245
4246 case ATA_12:
4247 case ATA_16:
4248 return ata_scsi_pass_thru;
4249
4250 case VARIABLE_LENGTH_CMD:
4251 return ata_scsi_var_len_cdb_xlat;
4252
4253 case MODE_SELECT:
4254 case MODE_SELECT_10:
4255 return ata_scsi_mode_select_xlat;
4256 break;
4257
4258 case ZBC_IN:
4259 return ata_scsi_zbc_in_xlat;
4260
4261 case ZBC_OUT:
4262 return ata_scsi_zbc_out_xlat;
4263
4264 case SECURITY_PROTOCOL_IN:
4265 case SECURITY_PROTOCOL_OUT:
4266 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4267 break;
4268 return ata_scsi_security_inout_xlat;
4269
4270 case START_STOP:
4271 return ata_scsi_start_stop_xlat;
4272 }
4273
4274 return NULL;
4275}
4276
4277/**
4278 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4279 * @ap: ATA port to which the command was being sent
4280 * @cmd: SCSI command to dump
4281 *
4282 * Prints the contents of a SCSI command via printk().
4283 */
4284
4285static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4286 struct scsi_cmnd *cmd)
4287{
4288#ifdef ATA_DEBUG
4289 struct scsi_device *scsidev = cmd->device;
4290
4291 DPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4292 ap->print_id,
4293 scsidev->channel, scsidev->id, scsidev->lun,
4294 cmd->cmnd);
4295#endif
4296}
4297
4298static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4299 struct ata_device *dev)
4300{
4301 u8 scsi_op = scmd->cmnd[0];
4302 ata_xlat_func_t xlat_func;
4303 int rc = 0;
4304
4305 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4306 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4307 goto bad_cdb_len;
4308
4309 xlat_func = ata_get_xlat_func(dev, scsi_op);
4310 } else {
4311 if (unlikely(!scmd->cmd_len))
4312 goto bad_cdb_len;
4313
4314 xlat_func = NULL;
4315 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4316 /* relay SCSI command to ATAPI device */
4317 int len = COMMAND_SIZE(scsi_op);
4318 if (unlikely(len > scmd->cmd_len ||
4319 len > dev->cdb_len ||
4320 scmd->cmd_len > ATAPI_CDB_LEN))
4321 goto bad_cdb_len;
4322
4323 xlat_func = atapi_xlat;
4324 } else {
4325 /* ATA_16 passthru, treat as an ATA command */
4326 if (unlikely(scmd->cmd_len > 16))
4327 goto bad_cdb_len;
4328
4329 xlat_func = ata_get_xlat_func(dev, scsi_op);
4330 }
4331 }
4332
4333 if (xlat_func)
4334 rc = ata_scsi_translate(dev, scmd, xlat_func);
4335 else
4336 ata_scsi_simulate(dev, scmd);
4337
4338 return rc;
4339
4340 bad_cdb_len:
4341 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4342 scmd->cmd_len, scsi_op, dev->cdb_len);
4343 scmd->result = DID_ERROR << 16;
4344 scmd->scsi_done(scmd);
4345 return 0;
4346}
4347
4348/**
4349 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4350 * @shost: SCSI host of command to be sent
4351 * @cmd: SCSI command to be sent
4352 *
4353 * In some cases, this function translates SCSI commands into
4354 * ATA taskfiles, and queues the taskfiles to be sent to
4355 * hardware. In other cases, this function simulates a
4356 * SCSI device by evaluating and responding to certain
4357 * SCSI commands. This creates the overall effect of
4358 * ATA and ATAPI devices appearing as SCSI devices.
4359 *
4360 * LOCKING:
4361 * ATA host lock
4362 *
4363 * RETURNS:
4364 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4365 * 0 otherwise.
4366 */
4367int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4368{
4369 struct ata_port *ap;
4370 struct ata_device *dev;
4371 struct scsi_device *scsidev = cmd->device;
4372 int rc = 0;
4373 unsigned long irq_flags;
4374
4375 ap = ata_shost_to_port(shost);
4376
4377 spin_lock_irqsave(ap->lock, irq_flags);
4378
4379 ata_scsi_dump_cdb(ap, cmd);
4380
4381 dev = ata_scsi_find_dev(ap, scsidev);
4382 if (likely(dev))
4383 rc = __ata_scsi_queuecmd(cmd, dev);
4384 else {
4385 cmd->result = (DID_BAD_TARGET << 16);
4386 cmd->scsi_done(cmd);
4387 }
4388
4389 spin_unlock_irqrestore(ap->lock, irq_flags);
4390
4391 return rc;
4392}
4393
4394/**
4395 * ata_scsi_simulate - simulate SCSI command on ATA device
4396 * @dev: the target device
4397 * @cmd: SCSI command being sent to device.
4398 *
4399 * Interprets and directly executes a select list of SCSI commands
4400 * that can be handled internally.
4401 *
4402 * LOCKING:
4403 * spin_lock_irqsave(host lock)
4404 */
4405
4406void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4407{
4408 struct ata_scsi_args args;
4409 const u8 *scsicmd = cmd->cmnd;
4410 u8 tmp8;
4411
4412 args.dev = dev;
4413 args.id = dev->id;
4414 args.cmd = cmd;
4415
4416 switch(scsicmd[0]) {
4417 case INQUIRY:
4418 if (scsicmd[1] & 2) /* is CmdDt set? */
4419 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4420 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4421 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4422 else switch (scsicmd[2]) {
4423 case 0x00:
4424 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4425 break;
4426 case 0x80:
4427 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4428 break;
4429 case 0x83:
4430 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4431 break;
4432 case 0x89:
4433 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4434 break;
4435 case 0xb0:
4436 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4437 break;
4438 case 0xb1:
4439 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4440 break;
4441 case 0xb2:
4442 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4443 break;
4444 case 0xb6:
4445 if (dev->flags & ATA_DFLAG_ZAC) {
4446 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4447 break;
4448 }
4449 /* Fallthrough */
4450 default:
4451 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4452 break;
4453 }
4454 break;
4455
4456 case MODE_SENSE:
4457 case MODE_SENSE_10:
4458 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4459 break;
4460
4461 case READ_CAPACITY:
4462 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4463 break;
4464
4465 case SERVICE_ACTION_IN_16:
4466 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4467 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4468 else
4469 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4470 break;
4471
4472 case REPORT_LUNS:
4473 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4474 break;
4475
4476 case REQUEST_SENSE:
4477 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4478 cmd->result = (DRIVER_SENSE << 24);
4479 break;
4480
4481 /* if we reach this, then writeback caching is disabled,
4482 * turning this into a no-op.
4483 */
4484 case SYNCHRONIZE_CACHE:
4485 /* fall through */
4486
4487 /* no-op's, complete with success */
4488 case REZERO_UNIT:
4489 case SEEK_6:
4490 case SEEK_10:
4491 case TEST_UNIT_READY:
4492 break;
4493
4494 case SEND_DIAGNOSTIC:
4495 tmp8 = scsicmd[1] & ~(1 << 3);
4496 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4497 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4498 break;
4499
4500 case MAINTENANCE_IN:
4501 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4502 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4503 else
4504 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4505 break;
4506
4507 /* all other commands */
4508 default:
4509 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4510 /* "Invalid command operation code" */
4511 break;
4512 }
4513
4514 cmd->scsi_done(cmd);
4515}
4516
4517int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4518{
4519 int i, rc;
4520
4521 for (i = 0; i < host->n_ports; i++) {
4522 struct ata_port *ap = host->ports[i];
4523 struct Scsi_Host *shost;
4524
4525 rc = -ENOMEM;
4526 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4527 if (!shost)
4528 goto err_alloc;
4529
4530 shost->eh_noresume = 1;
4531 *(struct ata_port **)&shost->hostdata[0] = ap;
4532 ap->scsi_host = shost;
4533
4534 shost->transportt = ata_scsi_transport_template;
4535 shost->unique_id = ap->print_id;
4536 shost->max_id = 16;
4537 shost->max_lun = 1;
4538 shost->max_channel = 1;
4539 shost->max_cmd_len = 32;
4540
4541 /* Schedule policy is determined by ->qc_defer()
4542 * callback and it needs to see every deferred qc.
4543 * Set host_blocked to 1 to prevent SCSI midlayer from
4544 * automatically deferring requests.
4545 */
4546 shost->max_host_blocked = 1;
4547
4548 rc = scsi_add_host_with_dma(ap->scsi_host,
4549 &ap->tdev, ap->host->dev);
4550 if (rc)
4551 goto err_add;
4552 }
4553
4554 return 0;
4555
4556 err_add:
4557 scsi_host_put(host->ports[i]->scsi_host);
4558 err_alloc:
4559 while (--i >= 0) {
4560 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4561
4562 scsi_remove_host(shost);
4563 scsi_host_put(shost);
4564 }
4565 return rc;
4566}
4567
4568void ata_scsi_scan_host(struct ata_port *ap, int sync)
4569{
4570 int tries = 5;
4571 struct ata_device *last_failed_dev = NULL;
4572 struct ata_link *link;
4573 struct ata_device *dev;
4574
4575 repeat:
4576 ata_for_each_link(link, ap, EDGE) {
4577 ata_for_each_dev(dev, link, ENABLED) {
4578 struct scsi_device *sdev;
4579 int channel = 0, id = 0;
4580
4581 if (dev->sdev)
4582 continue;
4583
4584 if (ata_is_host_link(link))
4585 id = dev->devno;
4586 else
4587 channel = link->pmp;
4588
4589 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4590 NULL);
4591 if (!IS_ERR(sdev)) {
4592 dev->sdev = sdev;
4593 scsi_device_put(sdev);
4594 } else {
4595 dev->sdev = NULL;
4596 }
4597 }
4598 }
4599
4600 /* If we scanned while EH was in progress or allocation
4601 * failure occurred, scan would have failed silently. Check
4602 * whether all devices are attached.
4603 */
4604 ata_for_each_link(link, ap, EDGE) {
4605 ata_for_each_dev(dev, link, ENABLED) {
4606 if (!dev->sdev)
4607 goto exit_loop;
4608 }
4609 }
4610 exit_loop:
4611 if (!link)
4612 return;
4613
4614 /* we're missing some SCSI devices */
4615 if (sync) {
4616 /* If caller requested synchrnous scan && we've made
4617 * any progress, sleep briefly and repeat.
4618 */
4619 if (dev != last_failed_dev) {
4620 msleep(100);
4621 last_failed_dev = dev;
4622 goto repeat;
4623 }
4624
4625 /* We might be failing to detect boot device, give it
4626 * a few more chances.
4627 */
4628 if (--tries) {
4629 msleep(100);
4630 goto repeat;
4631 }
4632
4633 ata_port_err(ap,
4634 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4635 }
4636
4637 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4638 round_jiffies_relative(HZ));
4639}
4640
4641/**
4642 * ata_scsi_offline_dev - offline attached SCSI device
4643 * @dev: ATA device to offline attached SCSI device for
4644 *
4645 * This function is called from ata_eh_hotplug() and responsible
4646 * for taking the SCSI device attached to @dev offline. This
4647 * function is called with host lock which protects dev->sdev
4648 * against clearing.
4649 *
4650 * LOCKING:
4651 * spin_lock_irqsave(host lock)
4652 *
4653 * RETURNS:
4654 * 1 if attached SCSI device exists, 0 otherwise.
4655 */
4656int ata_scsi_offline_dev(struct ata_device *dev)
4657{
4658 if (dev->sdev) {
4659 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4660 return 1;
4661 }
4662 return 0;
4663}
4664
4665/**
4666 * ata_scsi_remove_dev - remove attached SCSI device
4667 * @dev: ATA device to remove attached SCSI device for
4668 *
4669 * This function is called from ata_eh_scsi_hotplug() and
4670 * responsible for removing the SCSI device attached to @dev.
4671 *
4672 * LOCKING:
4673 * Kernel thread context (may sleep).
4674 */
4675static void ata_scsi_remove_dev(struct ata_device *dev)
4676{
4677 struct ata_port *ap = dev->link->ap;
4678 struct scsi_device *sdev;
4679 unsigned long flags;
4680
4681 /* Alas, we need to grab scan_mutex to ensure SCSI device
4682 * state doesn't change underneath us and thus
4683 * scsi_device_get() always succeeds. The mutex locking can
4684 * be removed if there is __scsi_device_get() interface which
4685 * increments reference counts regardless of device state.
4686 */
4687 mutex_lock(&ap->scsi_host->scan_mutex);
4688 spin_lock_irqsave(ap->lock, flags);
4689
4690 /* clearing dev->sdev is protected by host lock */
4691 sdev = dev->sdev;
4692 dev->sdev = NULL;
4693
4694 if (sdev) {
4695 /* If user initiated unplug races with us, sdev can go
4696 * away underneath us after the host lock and
4697 * scan_mutex are released. Hold onto it.
4698 */
4699 if (scsi_device_get(sdev) == 0) {
4700 /* The following ensures the attached sdev is
4701 * offline on return from ata_scsi_offline_dev()
4702 * regardless it wins or loses the race
4703 * against this function.
4704 */
4705 scsi_device_set_state(sdev, SDEV_OFFLINE);
4706 } else {
4707 WARN_ON(1);
4708 sdev = NULL;
4709 }
4710 }
4711
4712 spin_unlock_irqrestore(ap->lock, flags);
4713 mutex_unlock(&ap->scsi_host->scan_mutex);
4714
4715 if (sdev) {
4716 ata_dev_info(dev, "detaching (SCSI %s)\n",
4717 dev_name(&sdev->sdev_gendev));
4718
4719 scsi_remove_device(sdev);
4720 scsi_device_put(sdev);
4721 }
4722}
4723
4724static void ata_scsi_handle_link_detach(struct ata_link *link)
4725{
4726 struct ata_port *ap = link->ap;
4727 struct ata_device *dev;
4728
4729 ata_for_each_dev(dev, link, ALL) {
4730 unsigned long flags;
4731
4732 if (!(dev->flags & ATA_DFLAG_DETACHED))
4733 continue;
4734
4735 spin_lock_irqsave(ap->lock, flags);
4736 dev->flags &= ~ATA_DFLAG_DETACHED;
4737 spin_unlock_irqrestore(ap->lock, flags);
4738
4739 if (zpodd_dev_enabled(dev))
4740 zpodd_exit(dev);
4741
4742 ata_scsi_remove_dev(dev);
4743 }
4744}
4745
4746/**
4747 * ata_scsi_media_change_notify - send media change event
4748 * @dev: Pointer to the disk device with media change event
4749 *
4750 * Tell the block layer to send a media change notification
4751 * event.
4752 *
4753 * LOCKING:
4754 * spin_lock_irqsave(host lock)
4755 */
4756void ata_scsi_media_change_notify(struct ata_device *dev)
4757{
4758 if (dev->sdev)
4759 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4760 GFP_ATOMIC);
4761}
4762
4763/**
4764 * ata_scsi_hotplug - SCSI part of hotplug
4765 * @work: Pointer to ATA port to perform SCSI hotplug on
4766 *
4767 * Perform SCSI part of hotplug. It's executed from a separate
4768 * workqueue after EH completes. This is necessary because SCSI
4769 * hot plugging requires working EH and hot unplugging is
4770 * synchronized with hot plugging with a mutex.
4771 *
4772 * LOCKING:
4773 * Kernel thread context (may sleep).
4774 */
4775void ata_scsi_hotplug(struct work_struct *work)
4776{
4777 struct ata_port *ap =
4778 container_of(work, struct ata_port, hotplug_task.work);
4779 int i;
4780
4781 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4782 DPRINTK("ENTER/EXIT - unloading\n");
4783 return;
4784 }
4785
4786 /*
4787 * XXX - UGLY HACK
4788 *
4789 * The block layer suspend/resume path is fundamentally broken due
4790 * to freezable kthreads and workqueue and may deadlock if a block
4791 * device gets removed while resume is in progress. I don't know
4792 * what the solution is short of removing freezable kthreads and
4793 * workqueues altogether.
4794 *
4795 * The following is an ugly hack to avoid kicking off device
4796 * removal while freezer is active. This is a joke but does avoid
4797 * this particular deadlock scenario.
4798 *
4799 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4800 * http://marc.info/?l=linux-kernel&m=138695698516487
4801 */
4802#ifdef CONFIG_FREEZER
4803 while (pm_freezing)
4804 msleep(10);
4805#endif
4806
4807 DPRINTK("ENTER\n");
4808 mutex_lock(&ap->scsi_scan_mutex);
4809
4810 /* Unplug detached devices. We cannot use link iterator here
4811 * because PMP links have to be scanned even if PMP is
4812 * currently not attached. Iterate manually.
4813 */
4814 ata_scsi_handle_link_detach(&ap->link);
4815 if (ap->pmp_link)
4816 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4817 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4818
4819 /* scan for new ones */
4820 ata_scsi_scan_host(ap, 0);
4821
4822 mutex_unlock(&ap->scsi_scan_mutex);
4823 DPRINTK("EXIT\n");
4824}
4825
4826/**
4827 * ata_scsi_user_scan - indication for user-initiated bus scan
4828 * @shost: SCSI host to scan
4829 * @channel: Channel to scan
4830 * @id: ID to scan
4831 * @lun: LUN to scan
4832 *
4833 * This function is called when user explicitly requests bus
4834 * scan. Set probe pending flag and invoke EH.
4835 *
4836 * LOCKING:
4837 * SCSI layer (we don't care)
4838 *
4839 * RETURNS:
4840 * Zero.
4841 */
4842int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4843 unsigned int id, u64 lun)
4844{
4845 struct ata_port *ap = ata_shost_to_port(shost);
4846 unsigned long flags;
4847 int devno, rc = 0;
4848
4849 if (!ap->ops->error_handler)
4850 return -EOPNOTSUPP;
4851
4852 if (lun != SCAN_WILD_CARD && lun)
4853 return -EINVAL;
4854
4855 if (!sata_pmp_attached(ap)) {
4856 if (channel != SCAN_WILD_CARD && channel)
4857 return -EINVAL;
4858 devno = id;
4859 } else {
4860 if (id != SCAN_WILD_CARD && id)
4861 return -EINVAL;
4862 devno = channel;
4863 }
4864
4865 spin_lock_irqsave(ap->lock, flags);
4866
4867 if (devno == SCAN_WILD_CARD) {
4868 struct ata_link *link;
4869
4870 ata_for_each_link(link, ap, EDGE) {
4871 struct ata_eh_info *ehi = &link->eh_info;
4872 ehi->probe_mask |= ATA_ALL_DEVICES;
4873 ehi->action |= ATA_EH_RESET;
4874 }
4875 } else {
4876 struct ata_device *dev = ata_find_dev(ap, devno);
4877
4878 if (dev) {
4879 struct ata_eh_info *ehi = &dev->link->eh_info;
4880 ehi->probe_mask |= 1 << dev->devno;
4881 ehi->action |= ATA_EH_RESET;
4882 } else
4883 rc = -EINVAL;
4884 }
4885
4886 if (rc == 0) {
4887 ata_port_schedule_eh(ap);
4888 spin_unlock_irqrestore(ap->lock, flags);
4889 ata_port_wait_eh(ap);
4890 } else
4891 spin_unlock_irqrestore(ap->lock, flags);
4892
4893 return rc;
4894}
4895
4896/**
4897 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4898 * @work: Pointer to ATA port to perform scsi_rescan_device()
4899 *
4900 * After ATA pass thru (SAT) commands are executed successfully,
4901 * libata need to propagate the changes to SCSI layer.
4902 *
4903 * LOCKING:
4904 * Kernel thread context (may sleep).
4905 */
4906void ata_scsi_dev_rescan(struct work_struct *work)
4907{
4908 struct ata_port *ap =
4909 container_of(work, struct ata_port, scsi_rescan_task);
4910 struct ata_link *link;
4911 struct ata_device *dev;
4912 unsigned long flags;
4913
4914 mutex_lock(&ap->scsi_scan_mutex);
4915 spin_lock_irqsave(ap->lock, flags);
4916
4917 ata_for_each_link(link, ap, EDGE) {
4918 ata_for_each_dev(dev, link, ENABLED) {
4919 struct scsi_device *sdev = dev->sdev;
4920
4921 if (!sdev)
4922 continue;
4923 if (scsi_device_get(sdev))
4924 continue;
4925
4926 spin_unlock_irqrestore(ap->lock, flags);
4927 scsi_rescan_device(&(sdev->sdev_gendev));
4928 scsi_device_put(sdev);
4929 spin_lock_irqsave(ap->lock, flags);
4930 }
4931 }
4932
4933 spin_unlock_irqrestore(ap->lock, flags);
4934 mutex_unlock(&ap->scsi_scan_mutex);
4935}
4936
4937/**
4938 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4939 * @host: ATA host container for all SAS ports
4940 * @port_info: Information from low-level host driver
4941 * @shost: SCSI host that the scsi device is attached to
4942 *
4943 * LOCKING:
4944 * PCI/etc. bus probe sem.
4945 *
4946 * RETURNS:
4947 * ata_port pointer on success / NULL on failure.
4948 */
4949
4950struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4951 struct ata_port_info *port_info,
4952 struct Scsi_Host *shost)
4953{
4954 struct ata_port *ap;
4955
4956 ap = ata_port_alloc(host);
4957 if (!ap)
4958 return NULL;
4959
4960 ap->port_no = 0;
4961 ap->lock = &host->lock;
4962 ap->pio_mask = port_info->pio_mask;
4963 ap->mwdma_mask = port_info->mwdma_mask;
4964 ap->udma_mask = port_info->udma_mask;
4965 ap->flags |= port_info->flags;
4966 ap->ops = port_info->port_ops;
4967 ap->cbl = ATA_CBL_SATA;
4968
4969 return ap;
4970}
4971EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4972
4973/**
4974 * ata_sas_port_start - Set port up for dma.
4975 * @ap: Port to initialize
4976 *
4977 * Called just after data structures for each port are
4978 * initialized.
4979 *
4980 * May be used as the port_start() entry in ata_port_operations.
4981 *
4982 * LOCKING:
4983 * Inherited from caller.
4984 */
4985int ata_sas_port_start(struct ata_port *ap)
4986{
4987 /*
4988 * the port is marked as frozen at allocation time, but if we don't
4989 * have new eh, we won't thaw it
4990 */
4991 if (!ap->ops->error_handler)
4992 ap->pflags &= ~ATA_PFLAG_FROZEN;
4993 return 0;
4994}
4995EXPORT_SYMBOL_GPL(ata_sas_port_start);
4996
4997/**
4998 * ata_port_stop - Undo ata_sas_port_start()
4999 * @ap: Port to shut down
5000 *
5001 * May be used as the port_stop() entry in ata_port_operations.
5002 *
5003 * LOCKING:
5004 * Inherited from caller.
5005 */
5006
5007void ata_sas_port_stop(struct ata_port *ap)
5008{
5009}
5010EXPORT_SYMBOL_GPL(ata_sas_port_stop);
5011
5012/**
5013 * ata_sas_async_probe - simply schedule probing and return
5014 * @ap: Port to probe
5015 *
5016 * For batch scheduling of probe for sas attached ata devices, assumes
5017 * the port has already been through ata_sas_port_init()
5018 */
5019void ata_sas_async_probe(struct ata_port *ap)
5020{
5021 __ata_port_probe(ap);
5022}
5023EXPORT_SYMBOL_GPL(ata_sas_async_probe);
5024
5025int ata_sas_sync_probe(struct ata_port *ap)
5026{
5027 return ata_port_probe(ap);
5028}
5029EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
5030
5031
5032/**
5033 * ata_sas_port_init - Initialize a SATA device
5034 * @ap: SATA port to initialize
5035 *
5036 * LOCKING:
5037 * PCI/etc. bus probe sem.
5038 *
5039 * RETURNS:
5040 * Zero on success, non-zero on error.
5041 */
5042
5043int ata_sas_port_init(struct ata_port *ap)
5044{
5045 int rc = ap->ops->port_start(ap);
5046
5047 if (rc)
5048 return rc;
5049 ap->print_id = atomic_inc_return(&ata_print_id);
5050 return 0;
5051}
5052EXPORT_SYMBOL_GPL(ata_sas_port_init);
5053
5054/**
5055 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5056 * @ap: SATA port to destroy
5057 *
5058 */
5059
5060void ata_sas_port_destroy(struct ata_port *ap)
5061{
5062 if (ap->ops->port_stop)
5063 ap->ops->port_stop(ap);
5064 kfree(ap);
5065}
5066EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5067
5068/**
5069 * ata_sas_slave_configure - Default slave_config routine for libata devices
5070 * @sdev: SCSI device to configure
5071 * @ap: ATA port to which SCSI device is attached
5072 *
5073 * RETURNS:
5074 * Zero.
5075 */
5076
5077int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5078{
5079 ata_scsi_sdev_config(sdev);
5080 ata_scsi_dev_config(sdev, ap->link.device);
5081 return 0;
5082}
5083EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5084
5085/**
5086 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5087 * @cmd: SCSI command to be sent
5088 * @ap: ATA port to which the command is being sent
5089 *
5090 * RETURNS:
5091 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5092 * 0 otherwise.
5093 */
5094
5095int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5096{
5097 int rc = 0;
5098
5099 ata_scsi_dump_cdb(ap, cmd);
5100
5101 if (likely(ata_dev_enabled(ap->link.device)))
5102 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5103 else {
5104 cmd->result = (DID_BAD_TARGET << 16);
5105 cmd->scsi_done(cmd);
5106 }
5107 return rc;
5108}
5109EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5110
5111int ata_sas_allocate_tag(struct ata_port *ap)
5112{
5113 unsigned int max_queue = ap->host->n_tags;
5114 unsigned int i, tag;
5115
5116 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5117 tag = tag < max_queue ? tag : 0;
5118
5119 /* the last tag is reserved for internal command. */
5120 if (tag == ATA_TAG_INTERNAL)
5121 continue;
5122
5123 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5124 ap->sas_last_tag = tag;
5125 return tag;
5126 }
5127 }
5128 return -1;
5129}
5130
5131void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5132{
5133 clear_bit(tag, &ap->sas_tag_allocated);
5134}