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_WITH_PARTIAL] = "min_power_with_partial",
114 [ATA_LPM_MIN_POWER] = "min_power",
115};
116
117static ssize_t ata_scsi_lpm_store(struct device *device,
118 struct device_attribute *attr,
119 const char *buf, size_t count)
120{
121 struct Scsi_Host *shost = class_to_shost(device);
122 struct ata_port *ap = ata_shost_to_port(shost);
123 struct ata_link *link;
124 struct ata_device *dev;
125 enum ata_lpm_policy policy;
126 unsigned long flags;
127
128 /* UNKNOWN is internal state, iterate from MAX_POWER */
129 for (policy = ATA_LPM_MAX_POWER;
130 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
131 const char *name = ata_lpm_policy_names[policy];
132
133 if (strncmp(name, buf, strlen(name)) == 0)
134 break;
135 }
136 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
137 return -EINVAL;
138
139 spin_lock_irqsave(ap->lock, flags);
140
141 ata_for_each_link(link, ap, EDGE) {
142 ata_for_each_dev(dev, &ap->link, ENABLED) {
143 if (dev->horkage & ATA_HORKAGE_NOLPM) {
144 count = -EOPNOTSUPP;
145 goto out_unlock;
146 }
147 }
148 }
149
150 ap->target_lpm_policy = policy;
151 ata_port_schedule_eh(ap);
152out_unlock:
153 spin_unlock_irqrestore(ap->lock, flags);
154 return count;
155}
156
157static ssize_t ata_scsi_lpm_show(struct device *dev,
158 struct device_attribute *attr, char *buf)
159{
160 struct Scsi_Host *shost = class_to_shost(dev);
161 struct ata_port *ap = ata_shost_to_port(shost);
162
163 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
164 return -EINVAL;
165
166 return snprintf(buf, PAGE_SIZE, "%s\n",
167 ata_lpm_policy_names[ap->target_lpm_policy]);
168}
169DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
170 ata_scsi_lpm_show, ata_scsi_lpm_store);
171EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
172
173static ssize_t ata_scsi_park_show(struct device *device,
174 struct device_attribute *attr, char *buf)
175{
176 struct scsi_device *sdev = to_scsi_device(device);
177 struct ata_port *ap;
178 struct ata_link *link;
179 struct ata_device *dev;
180 unsigned long now;
181 unsigned int uninitialized_var(msecs);
182 int rc = 0;
183
184 ap = ata_shost_to_port(sdev->host);
185
186 spin_lock_irq(ap->lock);
187 dev = ata_scsi_find_dev(ap, sdev);
188 if (!dev) {
189 rc = -ENODEV;
190 goto unlock;
191 }
192 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
193 rc = -EOPNOTSUPP;
194 goto unlock;
195 }
196
197 link = dev->link;
198 now = jiffies;
199 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
200 link->eh_context.unloaded_mask & (1 << dev->devno) &&
201 time_after(dev->unpark_deadline, now))
202 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
203 else
204 msecs = 0;
205
206unlock:
207 spin_unlock_irq(ap->lock);
208
209 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
210}
211
212static ssize_t ata_scsi_park_store(struct device *device,
213 struct device_attribute *attr,
214 const char *buf, size_t len)
215{
216 struct scsi_device *sdev = to_scsi_device(device);
217 struct ata_port *ap;
218 struct ata_device *dev;
219 long int input;
220 unsigned long flags;
221 int rc;
222
223 rc = kstrtol(buf, 10, &input);
224 if (rc)
225 return rc;
226 if (input < -2)
227 return -EINVAL;
228 if (input > ATA_TMOUT_MAX_PARK) {
229 rc = -EOVERFLOW;
230 input = ATA_TMOUT_MAX_PARK;
231 }
232
233 ap = ata_shost_to_port(sdev->host);
234
235 spin_lock_irqsave(ap->lock, flags);
236 dev = ata_scsi_find_dev(ap, sdev);
237 if (unlikely(!dev)) {
238 rc = -ENODEV;
239 goto unlock;
240 }
241 if (dev->class != ATA_DEV_ATA &&
242 dev->class != ATA_DEV_ZAC) {
243 rc = -EOPNOTSUPP;
244 goto unlock;
245 }
246
247 if (input >= 0) {
248 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
249 rc = -EOPNOTSUPP;
250 goto unlock;
251 }
252
253 dev->unpark_deadline = ata_deadline(jiffies, input);
254 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
255 ata_port_schedule_eh(ap);
256 complete(&ap->park_req_pending);
257 } else {
258 switch (input) {
259 case -1:
260 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
261 break;
262 case -2:
263 dev->flags |= ATA_DFLAG_NO_UNLOAD;
264 break;
265 }
266 }
267unlock:
268 spin_unlock_irqrestore(ap->lock, flags);
269
270 return rc ? rc : len;
271}
272DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
273 ata_scsi_park_show, ata_scsi_park_store);
274EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
275
276static ssize_t ata_ncq_prio_enable_show(struct device *device,
277 struct device_attribute *attr,
278 char *buf)
279{
280 struct scsi_device *sdev = to_scsi_device(device);
281 struct ata_port *ap;
282 struct ata_device *dev;
283 bool ncq_prio_enable;
284 int rc = 0;
285
286 ap = ata_shost_to_port(sdev->host);
287
288 spin_lock_irq(ap->lock);
289 dev = ata_scsi_find_dev(ap, sdev);
290 if (!dev) {
291 rc = -ENODEV;
292 goto unlock;
293 }
294
295 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
296
297unlock:
298 spin_unlock_irq(ap->lock);
299
300 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
301}
302
303static ssize_t ata_ncq_prio_enable_store(struct device *device,
304 struct device_attribute *attr,
305 const char *buf, size_t len)
306{
307 struct scsi_device *sdev = to_scsi_device(device);
308 struct ata_port *ap;
309 struct ata_device *dev;
310 long int input;
311 int rc;
312
313 rc = kstrtol(buf, 10, &input);
314 if (rc)
315 return rc;
316 if ((input < 0) || (input > 1))
317 return -EINVAL;
318
319 ap = ata_shost_to_port(sdev->host);
320 dev = ata_scsi_find_dev(ap, sdev);
321 if (unlikely(!dev))
322 return -ENODEV;
323
324 spin_lock_irq(ap->lock);
325 if (input)
326 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
327 else
328 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
329
330 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
331 dev->link->eh_info.flags |= ATA_EHI_QUIET;
332 ata_port_schedule_eh(ap);
333 spin_unlock_irq(ap->lock);
334
335 ata_port_wait_eh(ap);
336
337 if (input) {
338 spin_lock_irq(ap->lock);
339 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
340 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
341 rc = -EIO;
342 }
343 spin_unlock_irq(ap->lock);
344 }
345
346 return rc ? rc : len;
347}
348
349DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
350 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
351EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
352
353void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
354 u8 sk, u8 asc, u8 ascq)
355{
356 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
357
358 if (!cmd)
359 return;
360
361 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
362
363 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
364}
365
366void ata_scsi_set_sense_information(struct ata_device *dev,
367 struct scsi_cmnd *cmd,
368 const struct ata_taskfile *tf)
369{
370 u64 information;
371
372 if (!cmd)
373 return;
374
375 information = ata_tf_read_block(tf, dev);
376 if (information == U64_MAX)
377 return;
378
379 scsi_set_sense_information(cmd->sense_buffer,
380 SCSI_SENSE_BUFFERSIZE, information);
381}
382
383static void ata_scsi_set_invalid_field(struct ata_device *dev,
384 struct scsi_cmnd *cmd, u16 field, u8 bit)
385{
386 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
387 /* "Invalid field in CDB" */
388 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
389 field, bit, 1);
390}
391
392static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
393 struct scsi_cmnd *cmd, u16 field)
394{
395 /* "Invalid field in parameter list" */
396 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
397 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
398 field, 0xff, 0);
399}
400
401static ssize_t
402ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
403 const char *buf, size_t count)
404{
405 struct Scsi_Host *shost = class_to_shost(dev);
406 struct ata_port *ap = ata_shost_to_port(shost);
407 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
408 return ap->ops->em_store(ap, buf, count);
409 return -EINVAL;
410}
411
412static ssize_t
413ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
414 char *buf)
415{
416 struct Scsi_Host *shost = class_to_shost(dev);
417 struct ata_port *ap = ata_shost_to_port(shost);
418
419 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
420 return ap->ops->em_show(ap, buf);
421 return -EINVAL;
422}
423DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
424 ata_scsi_em_message_show, ata_scsi_em_message_store);
425EXPORT_SYMBOL_GPL(dev_attr_em_message);
426
427static ssize_t
428ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
429 char *buf)
430{
431 struct Scsi_Host *shost = class_to_shost(dev);
432 struct ata_port *ap = ata_shost_to_port(shost);
433
434 return snprintf(buf, 23, "%d\n", ap->em_message_type);
435}
436DEVICE_ATTR(em_message_type, S_IRUGO,
437 ata_scsi_em_message_type_show, NULL);
438EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
439
440static ssize_t
441ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
442 char *buf)
443{
444 struct scsi_device *sdev = to_scsi_device(dev);
445 struct ata_port *ap = ata_shost_to_port(sdev->host);
446 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
447
448 if (atadev && ap->ops->sw_activity_show &&
449 (ap->flags & ATA_FLAG_SW_ACTIVITY))
450 return ap->ops->sw_activity_show(atadev, buf);
451 return -EINVAL;
452}
453
454static ssize_t
455ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
456 const char *buf, size_t count)
457{
458 struct scsi_device *sdev = to_scsi_device(dev);
459 struct ata_port *ap = ata_shost_to_port(sdev->host);
460 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
461 enum sw_activity val;
462 int rc;
463
464 if (atadev && ap->ops->sw_activity_store &&
465 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
466 val = simple_strtoul(buf, NULL, 0);
467 switch (val) {
468 case OFF: case BLINK_ON: case BLINK_OFF:
469 rc = ap->ops->sw_activity_store(atadev, val);
470 if (!rc)
471 return count;
472 else
473 return rc;
474 }
475 }
476 return -EINVAL;
477}
478DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
479 ata_scsi_activity_store);
480EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
481
482struct device_attribute *ata_common_sdev_attrs[] = {
483 &dev_attr_unload_heads,
484 &dev_attr_ncq_prio_enable,
485 NULL
486};
487EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
488
489/**
490 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
491 * @sdev: SCSI device for which BIOS geometry is to be determined
492 * @bdev: block device associated with @sdev
493 * @capacity: capacity of SCSI device
494 * @geom: location to which geometry will be output
495 *
496 * Generic bios head/sector/cylinder calculator
497 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
498 * mapping. Some situations may arise where the disk is not
499 * bootable if this is not used.
500 *
501 * LOCKING:
502 * Defined by the SCSI layer. We don't really care.
503 *
504 * RETURNS:
505 * Zero.
506 */
507int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
508 sector_t capacity, int geom[])
509{
510 geom[0] = 255;
511 geom[1] = 63;
512 sector_div(capacity, 255*63);
513 geom[2] = capacity;
514
515 return 0;
516}
517
518/**
519 * ata_scsi_unlock_native_capacity - unlock native capacity
520 * @sdev: SCSI device to adjust device capacity for
521 *
522 * This function is called if a partition on @sdev extends beyond
523 * the end of the device. It requests EH to unlock HPA.
524 *
525 * LOCKING:
526 * Defined by the SCSI layer. Might sleep.
527 */
528void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
529{
530 struct ata_port *ap = ata_shost_to_port(sdev->host);
531 struct ata_device *dev;
532 unsigned long flags;
533
534 spin_lock_irqsave(ap->lock, flags);
535
536 dev = ata_scsi_find_dev(ap, sdev);
537 if (dev && dev->n_sectors < dev->n_native_sectors) {
538 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
539 dev->link->eh_info.action |= ATA_EH_RESET;
540 ata_port_schedule_eh(ap);
541 }
542
543 spin_unlock_irqrestore(ap->lock, flags);
544 ata_port_wait_eh(ap);
545}
546
547/**
548 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
549 * @ap: target port
550 * @sdev: SCSI device to get identify data for
551 * @arg: User buffer area for identify data
552 *
553 * LOCKING:
554 * Defined by the SCSI layer. We don't really care.
555 *
556 * RETURNS:
557 * Zero on success, negative errno on error.
558 */
559static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
560 void __user *arg)
561{
562 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
563 u16 __user *dst = arg;
564 char buf[40];
565
566 if (!dev)
567 return -ENOMSG;
568
569 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
570 return -EFAULT;
571
572 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
573 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
574 return -EFAULT;
575
576 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
577 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
578 return -EFAULT;
579
580 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
581 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
582 return -EFAULT;
583
584 return 0;
585}
586
587/**
588 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
589 * @scsidev: Device to which we are issuing command
590 * @arg: User provided data for issuing command
591 *
592 * LOCKING:
593 * Defined by the SCSI layer. We don't really care.
594 *
595 * RETURNS:
596 * Zero on success, negative errno on error.
597 */
598int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
599{
600 int rc = 0;
601 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
602 u8 scsi_cmd[MAX_COMMAND_SIZE];
603 u8 args[4], *argbuf = NULL;
604 int argsize = 0;
605 enum dma_data_direction data_dir;
606 struct scsi_sense_hdr sshdr;
607 int cmd_result;
608
609 if (arg == NULL)
610 return -EINVAL;
611
612 if (copy_from_user(args, arg, sizeof(args)))
613 return -EFAULT;
614
615 memset(sensebuf, 0, sizeof(sensebuf));
616 memset(scsi_cmd, 0, sizeof(scsi_cmd));
617
618 if (args[3]) {
619 argsize = ATA_SECT_SIZE * args[3];
620 argbuf = kmalloc(argsize, GFP_KERNEL);
621 if (argbuf == NULL) {
622 rc = -ENOMEM;
623 goto error;
624 }
625
626 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
627 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
628 block count in sector count field */
629 data_dir = DMA_FROM_DEVICE;
630 } else {
631 scsi_cmd[1] = (3 << 1); /* Non-data */
632 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
633 data_dir = DMA_NONE;
634 }
635
636 scsi_cmd[0] = ATA_16;
637
638 scsi_cmd[4] = args[2];
639 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
640 scsi_cmd[6] = args[3];
641 scsi_cmd[8] = args[1];
642 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
643 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
644 } else {
645 scsi_cmd[6] = args[1];
646 }
647 scsi_cmd[14] = args[0];
648
649 /* Good values for timeout and retries? Values below
650 from scsi_ioctl_send_command() for default case... */
651 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
652 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
653
654 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
655 u8 *desc = sensebuf + 8;
656 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
657
658 /* If we set cc then ATA pass-through will cause a
659 * check condition even if no error. Filter that. */
660 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
661 if (sshdr.sense_key == RECOVERED_ERROR &&
662 sshdr.asc == 0 && sshdr.ascq == 0x1d)
663 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
664 }
665
666 /* Send userspace a few ATA registers (same as drivers/ide) */
667 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
668 desc[0] == 0x09) { /* code is "ATA Descriptor" */
669 args[0] = desc[13]; /* status */
670 args[1] = desc[3]; /* error */
671 args[2] = desc[5]; /* sector count (0:7) */
672 if (copy_to_user(arg, args, sizeof(args)))
673 rc = -EFAULT;
674 }
675 }
676
677
678 if (cmd_result) {
679 rc = -EIO;
680 goto error;
681 }
682
683 if ((argbuf)
684 && copy_to_user(arg + sizeof(args), argbuf, argsize))
685 rc = -EFAULT;
686error:
687 kfree(argbuf);
688 return rc;
689}
690
691/**
692 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
693 * @scsidev: Device to which we are issuing command
694 * @arg: User provided data for issuing command
695 *
696 * LOCKING:
697 * Defined by the SCSI layer. We don't really care.
698 *
699 * RETURNS:
700 * Zero on success, negative errno on error.
701 */
702int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
703{
704 int rc = 0;
705 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
706 u8 scsi_cmd[MAX_COMMAND_SIZE];
707 u8 args[7];
708 struct scsi_sense_hdr sshdr;
709 int cmd_result;
710
711 if (arg == NULL)
712 return -EINVAL;
713
714 if (copy_from_user(args, arg, sizeof(args)))
715 return -EFAULT;
716
717 memset(sensebuf, 0, sizeof(sensebuf));
718 memset(scsi_cmd, 0, sizeof(scsi_cmd));
719 scsi_cmd[0] = ATA_16;
720 scsi_cmd[1] = (3 << 1); /* Non-data */
721 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
722 scsi_cmd[4] = args[1];
723 scsi_cmd[6] = args[2];
724 scsi_cmd[8] = args[3];
725 scsi_cmd[10] = args[4];
726 scsi_cmd[12] = args[5];
727 scsi_cmd[13] = args[6] & 0x4f;
728 scsi_cmd[14] = args[0];
729
730 /* Good values for timeout and retries? Values below
731 from scsi_ioctl_send_command() for default case... */
732 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
733 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
734
735 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
736 u8 *desc = sensebuf + 8;
737 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
738
739 /* If we set cc then ATA pass-through will cause a
740 * check condition even if no error. Filter that. */
741 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
742 if (sshdr.sense_key == RECOVERED_ERROR &&
743 sshdr.asc == 0 && sshdr.ascq == 0x1d)
744 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
745 }
746
747 /* Send userspace ATA registers */
748 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
749 desc[0] == 0x09) {/* code is "ATA Descriptor" */
750 args[0] = desc[13]; /* status */
751 args[1] = desc[3]; /* error */
752 args[2] = desc[5]; /* sector count (0:7) */
753 args[3] = desc[7]; /* lbal */
754 args[4] = desc[9]; /* lbam */
755 args[5] = desc[11]; /* lbah */
756 args[6] = desc[12]; /* select */
757 if (copy_to_user(arg, args, sizeof(args)))
758 rc = -EFAULT;
759 }
760 }
761
762 if (cmd_result) {
763 rc = -EIO;
764 goto error;
765 }
766
767 error:
768 return rc;
769}
770
771static int ata_ioc32(struct ata_port *ap)
772{
773 if (ap->flags & ATA_FLAG_PIO_DMA)
774 return 1;
775 if (ap->pflags & ATA_PFLAG_PIO32)
776 return 1;
777 return 0;
778}
779
780int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
781 unsigned int cmd, void __user *arg)
782{
783 unsigned long val;
784 int rc = -EINVAL;
785 unsigned long flags;
786
787 switch (cmd) {
788 case HDIO_GET_32BIT:
789 spin_lock_irqsave(ap->lock, flags);
790 val = ata_ioc32(ap);
791 spin_unlock_irqrestore(ap->lock, flags);
792 return put_user(val, (unsigned long __user *)arg);
793
794 case HDIO_SET_32BIT:
795 val = (unsigned long) arg;
796 rc = 0;
797 spin_lock_irqsave(ap->lock, flags);
798 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
799 if (val)
800 ap->pflags |= ATA_PFLAG_PIO32;
801 else
802 ap->pflags &= ~ATA_PFLAG_PIO32;
803 } else {
804 if (val != ata_ioc32(ap))
805 rc = -EINVAL;
806 }
807 spin_unlock_irqrestore(ap->lock, flags);
808 return rc;
809
810 case HDIO_GET_IDENTITY:
811 return ata_get_identity(ap, scsidev, arg);
812
813 case HDIO_DRIVE_CMD:
814 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
815 return -EACCES;
816 return ata_cmd_ioctl(scsidev, arg);
817
818 case HDIO_DRIVE_TASK:
819 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
820 return -EACCES;
821 return ata_task_ioctl(scsidev, arg);
822
823 default:
824 rc = -ENOTTY;
825 break;
826 }
827
828 return rc;
829}
830EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
831
832int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
833 void __user *arg)
834{
835 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
836 scsidev, cmd, arg);
837}
838EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
839
840/**
841 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
842 * @dev: ATA device to which the new command is attached
843 * @cmd: SCSI command that originated this ATA command
844 *
845 * Obtain a reference to an unused ata_queued_cmd structure,
846 * which is the basic libata structure representing a single
847 * ATA command sent to the hardware.
848 *
849 * If a command was available, fill in the SCSI-specific
850 * portions of the structure with information on the
851 * current command.
852 *
853 * LOCKING:
854 * spin_lock_irqsave(host lock)
855 *
856 * RETURNS:
857 * Command allocated, or %NULL if none available.
858 */
859static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
860 struct scsi_cmnd *cmd)
861{
862 struct ata_queued_cmd *qc;
863
864 qc = ata_qc_new_init(dev, cmd->request->tag);
865 if (qc) {
866 qc->scsicmd = cmd;
867 qc->scsidone = cmd->scsi_done;
868
869 qc->sg = scsi_sglist(cmd);
870 qc->n_elem = scsi_sg_count(cmd);
871
872 if (cmd->request->rq_flags & RQF_QUIET)
873 qc->flags |= ATA_QCFLAG_QUIET;
874 } else {
875 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
876 cmd->scsi_done(cmd);
877 }
878
879 return qc;
880}
881
882static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
883{
884 struct scsi_cmnd *scmd = qc->scsicmd;
885
886 qc->extrabytes = scmd->request->extra_len;
887 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
888}
889
890/**
891 * ata_dump_status - user friendly display of error info
892 * @id: id of the port in question
893 * @tf: ptr to filled out taskfile
894 *
895 * Decode and dump the ATA error/status registers for the user so
896 * that they have some idea what really happened at the non
897 * make-believe layer.
898 *
899 * LOCKING:
900 * inherited from caller
901 */
902static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
903{
904 u8 stat = tf->command, err = tf->feature;
905
906 pr_warn("ata%u: status=0x%02x { ", id, stat);
907 if (stat & ATA_BUSY) {
908 pr_cont("Busy }\n"); /* Data is not valid in this case */
909 } else {
910 if (stat & ATA_DRDY) pr_cont("DriveReady ");
911 if (stat & ATA_DF) pr_cont("DeviceFault ");
912 if (stat & ATA_DSC) pr_cont("SeekComplete ");
913 if (stat & ATA_DRQ) pr_cont("DataRequest ");
914 if (stat & ATA_CORR) pr_cont("CorrectedError ");
915 if (stat & ATA_SENSE) pr_cont("Sense ");
916 if (stat & ATA_ERR) pr_cont("Error ");
917 pr_cont("}\n");
918
919 if (err) {
920 pr_warn("ata%u: error=0x%02x { ", id, err);
921 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
922 if (err & ATA_ICRC) {
923 if (err & ATA_ABORTED)
924 pr_cont("BadCRC ");
925 else pr_cont("Sector ");
926 }
927 if (err & ATA_UNC) pr_cont("UncorrectableError ");
928 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
929 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
930 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
931 pr_cont("}\n");
932 }
933 }
934}
935
936/**
937 * ata_to_sense_error - convert ATA error to SCSI error
938 * @id: ATA device number
939 * @drv_stat: value contained in ATA status register
940 * @drv_err: value contained in ATA error register
941 * @sk: the sense key we'll fill out
942 * @asc: the additional sense code we'll fill out
943 * @ascq: the additional sense code qualifier we'll fill out
944 * @verbose: be verbose
945 *
946 * Converts an ATA error into a SCSI error. Fill out pointers to
947 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
948 * format sense blocks.
949 *
950 * LOCKING:
951 * spin_lock_irqsave(host lock)
952 */
953static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
954 u8 *asc, u8 *ascq, int verbose)
955{
956 int i;
957
958 /* Based on the 3ware driver translation table */
959 static const unsigned char sense_table[][4] = {
960 /* BBD|ECC|ID|MAR */
961 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
962 // Device busy Aborted command
963 /* BBD|ECC|ID */
964 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
965 // Device busy Aborted command
966 /* ECC|MC|MARK */
967 {0x61, HARDWARE_ERROR, 0x00, 0x00},
968 // Device fault Hardware error
969 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
970 {0x84, ABORTED_COMMAND, 0x47, 0x00},
971 // Data CRC error SCSI parity error
972 /* MC|ID|ABRT|TRK0|MARK */
973 {0x37, NOT_READY, 0x04, 0x00},
974 // Unit offline Not ready
975 /* MCR|MARK */
976 {0x09, NOT_READY, 0x04, 0x00},
977 // Unrecovered disk error Not ready
978 /* Bad address mark */
979 {0x01, MEDIUM_ERROR, 0x13, 0x00},
980 // Address mark not found for data field
981 /* TRK0 - Track 0 not found */
982 {0x02, HARDWARE_ERROR, 0x00, 0x00},
983 // Hardware error
984 /* Abort: 0x04 is not translated here, see below */
985 /* Media change request */
986 {0x08, NOT_READY, 0x04, 0x00},
987 // FIXME: faking offline
988 /* SRV/IDNF - ID not found */
989 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
990 // Logical address out of range
991 /* MC - Media Changed */
992 {0x20, UNIT_ATTENTION, 0x28, 0x00},
993 // Not ready to ready change, medium may have changed
994 /* ECC - Uncorrectable ECC error */
995 {0x40, MEDIUM_ERROR, 0x11, 0x04},
996 // Unrecovered read error
997 /* BBD - block marked bad */
998 {0x80, MEDIUM_ERROR, 0x11, 0x04},
999 // Block marked bad Medium error, unrecovered read error
1000 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1001 };
1002 static const unsigned char stat_table[][4] = {
1003 /* Must be first because BUSY means no other bits valid */
1004 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1005 // Busy, fake parity for now
1006 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1007 // Device ready, unaligned write command
1008 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1009 // Device fault, internal target failure
1010 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1011 // Timed out in xfer, fake parity for now
1012 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1013 // Recovered ECC error Medium error, recovered
1014 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1015 };
1016
1017 /*
1018 * Is this an error we can process/parse
1019 */
1020 if (drv_stat & ATA_BUSY) {
1021 drv_err = 0; /* Ignore the err bits, they're invalid */
1022 }
1023
1024 if (drv_err) {
1025 /* Look for drv_err */
1026 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1027 /* Look for best matches first */
1028 if ((sense_table[i][0] & drv_err) ==
1029 sense_table[i][0]) {
1030 *sk = sense_table[i][1];
1031 *asc = sense_table[i][2];
1032 *ascq = sense_table[i][3];
1033 goto translate_done;
1034 }
1035 }
1036 }
1037
1038 /*
1039 * Fall back to interpreting status bits. Note that if the drv_err
1040 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1041 * is not descriptive enough.
1042 */
1043 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1044 if (stat_table[i][0] & drv_stat) {
1045 *sk = stat_table[i][1];
1046 *asc = stat_table[i][2];
1047 *ascq = stat_table[i][3];
1048 goto translate_done;
1049 }
1050 }
1051
1052 /*
1053 * We need a sensible error return here, which is tricky, and one
1054 * that won't cause people to do things like return a disk wrongly.
1055 */
1056 *sk = ABORTED_COMMAND;
1057 *asc = 0x00;
1058 *ascq = 0x00;
1059
1060 translate_done:
1061 if (verbose)
1062 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1063 id, drv_stat, drv_err, *sk, *asc, *ascq);
1064 return;
1065}
1066
1067/*
1068 * ata_gen_passthru_sense - Generate check condition sense block.
1069 * @qc: Command that completed.
1070 *
1071 * This function is specific to the ATA descriptor format sense
1072 * block specified for the ATA pass through commands. Regardless
1073 * of whether the command errored or not, return a sense
1074 * block. Copy all controller registers into the sense
1075 * block. If there was no error, we get the request from an ATA
1076 * passthrough command, so we use the following sense data:
1077 * sk = RECOVERED ERROR
1078 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1079 *
1080 *
1081 * LOCKING:
1082 * None.
1083 */
1084static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1085{
1086 struct scsi_cmnd *cmd = qc->scsicmd;
1087 struct ata_taskfile *tf = &qc->result_tf;
1088 unsigned char *sb = cmd->sense_buffer;
1089 unsigned char *desc = sb + 8;
1090 int verbose = qc->ap->ops->error_handler == NULL;
1091 u8 sense_key, asc, ascq;
1092
1093 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1094
1095 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1096
1097 /*
1098 * Use ata_to_sense_error() to map status register bits
1099 * onto sense key, asc & ascq.
1100 */
1101 if (qc->err_mask ||
1102 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1103 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1104 &sense_key, &asc, &ascq, verbose);
1105 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1106 } else {
1107 /*
1108 * ATA PASS-THROUGH INFORMATION AVAILABLE
1109 * Always in descriptor format sense.
1110 */
1111 scsi_build_sense_buffer(1, cmd->sense_buffer,
1112 RECOVERED_ERROR, 0, 0x1D);
1113 }
1114
1115 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1116 u8 len;
1117
1118 /* descriptor format */
1119 len = sb[7];
1120 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1121 if (!desc) {
1122 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1123 return;
1124 sb[7] = len + 14;
1125 desc = sb + 8 + len;
1126 }
1127 desc[0] = 9;
1128 desc[1] = 12;
1129 /*
1130 * Copy registers into sense buffer.
1131 */
1132 desc[2] = 0x00;
1133 desc[3] = tf->feature; /* == error reg */
1134 desc[5] = tf->nsect;
1135 desc[7] = tf->lbal;
1136 desc[9] = tf->lbam;
1137 desc[11] = tf->lbah;
1138 desc[12] = tf->device;
1139 desc[13] = tf->command; /* == status reg */
1140
1141 /*
1142 * Fill in Extend bit, and the high order bytes
1143 * if applicable.
1144 */
1145 if (tf->flags & ATA_TFLAG_LBA48) {
1146 desc[2] |= 0x01;
1147 desc[4] = tf->hob_nsect;
1148 desc[6] = tf->hob_lbal;
1149 desc[8] = tf->hob_lbam;
1150 desc[10] = tf->hob_lbah;
1151 }
1152 } else {
1153 /* Fixed sense format */
1154 desc[0] = tf->feature;
1155 desc[1] = tf->command; /* status */
1156 desc[2] = tf->device;
1157 desc[3] = tf->nsect;
1158 desc[7] = 0;
1159 if (tf->flags & ATA_TFLAG_LBA48) {
1160 desc[8] |= 0x80;
1161 if (tf->hob_nsect)
1162 desc[8] |= 0x40;
1163 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1164 desc[8] |= 0x20;
1165 }
1166 desc[9] = tf->lbal;
1167 desc[10] = tf->lbam;
1168 desc[11] = tf->lbah;
1169 }
1170}
1171
1172/**
1173 * ata_gen_ata_sense - generate a SCSI fixed sense block
1174 * @qc: Command that we are erroring out
1175 *
1176 * Generate sense block for a failed ATA command @qc. Descriptor
1177 * format is used to accommodate LBA48 block address.
1178 *
1179 * LOCKING:
1180 * None.
1181 */
1182static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1183{
1184 struct ata_device *dev = qc->dev;
1185 struct scsi_cmnd *cmd = qc->scsicmd;
1186 struct ata_taskfile *tf = &qc->result_tf;
1187 unsigned char *sb = cmd->sense_buffer;
1188 int verbose = qc->ap->ops->error_handler == NULL;
1189 u64 block;
1190 u8 sense_key, asc, ascq;
1191
1192 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1193
1194 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1195
1196 if (ata_dev_disabled(dev)) {
1197 /* Device disabled after error recovery */
1198 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1199 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1200 return;
1201 }
1202 /* Use ata_to_sense_error() to map status register bits
1203 * onto sense key, asc & ascq.
1204 */
1205 if (qc->err_mask ||
1206 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1207 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1208 &sense_key, &asc, &ascq, verbose);
1209 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1210 } else {
1211 /* Could not decode error */
1212 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1213 tf->command, qc->err_mask);
1214 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1215 return;
1216 }
1217
1218 block = ata_tf_read_block(&qc->result_tf, dev);
1219 if (block == U64_MAX)
1220 return;
1221
1222 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1223}
1224
1225static void ata_scsi_sdev_config(struct scsi_device *sdev)
1226{
1227 sdev->use_10_for_rw = 1;
1228 sdev->use_10_for_ms = 1;
1229 sdev->no_write_same = 1;
1230
1231 /* Schedule policy is determined by ->qc_defer() callback and
1232 * it needs to see every deferred qc. Set dev_blocked to 1 to
1233 * prevent SCSI midlayer from automatically deferring
1234 * requests.
1235 */
1236 sdev->max_device_blocked = 1;
1237}
1238
1239/**
1240 * atapi_drain_needed - Check whether data transfer may overflow
1241 * @rq: request to be checked
1242 *
1243 * ATAPI commands which transfer variable length data to host
1244 * might overflow due to application error or hardware bug. This
1245 * function checks whether overflow should be drained and ignored
1246 * for @request.
1247 *
1248 * LOCKING:
1249 * None.
1250 *
1251 * RETURNS:
1252 * 1 if ; otherwise, 0.
1253 */
1254static int atapi_drain_needed(struct request *rq)
1255{
1256 if (likely(!blk_rq_is_passthrough(rq)))
1257 return 0;
1258
1259 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1260 return 0;
1261
1262 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1263}
1264
1265static int ata_scsi_dev_config(struct scsi_device *sdev,
1266 struct ata_device *dev)
1267{
1268 struct request_queue *q = sdev->request_queue;
1269
1270 if (!ata_id_has_unload(dev->id))
1271 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1272
1273 /* configure max sectors */
1274 blk_queue_max_hw_sectors(q, dev->max_sectors);
1275
1276 if (dev->class == ATA_DEV_ATAPI) {
1277 void *buf;
1278
1279 sdev->sector_size = ATA_SECT_SIZE;
1280
1281 /* set DMA padding */
1282 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1283
1284 /* configure draining */
1285 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1286 if (!buf) {
1287 ata_dev_err(dev, "drain buffer allocation failed\n");
1288 return -ENOMEM;
1289 }
1290
1291 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1292 } else {
1293 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1294 sdev->manage_start_stop = 1;
1295 }
1296
1297 /*
1298 * ata_pio_sectors() expects buffer for each sector to not cross
1299 * page boundary. Enforce it by requiring buffers to be sector
1300 * aligned, which works iff sector_size is not larger than
1301 * PAGE_SIZE. ATAPI devices also need the alignment as
1302 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1303 */
1304 if (sdev->sector_size > PAGE_SIZE)
1305 ata_dev_warn(dev,
1306 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1307 sdev->sector_size);
1308
1309 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1310
1311 if (dev->flags & ATA_DFLAG_AN)
1312 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1313
1314 if (dev->flags & ATA_DFLAG_NCQ) {
1315 int depth;
1316
1317 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1318 depth = min(ATA_MAX_QUEUE, depth);
1319 scsi_change_queue_depth(sdev, depth);
1320 }
1321
1322 if (dev->flags & ATA_DFLAG_TRUSTED)
1323 sdev->security_supported = 1;
1324
1325 dev->sdev = sdev;
1326 return 0;
1327}
1328
1329/**
1330 * ata_scsi_slave_config - Set SCSI device attributes
1331 * @sdev: SCSI device to examine
1332 *
1333 * This is called before we actually start reading
1334 * and writing to the device, to configure certain
1335 * SCSI mid-layer behaviors.
1336 *
1337 * LOCKING:
1338 * Defined by SCSI layer. We don't really care.
1339 */
1340
1341int ata_scsi_slave_config(struct scsi_device *sdev)
1342{
1343 struct ata_port *ap = ata_shost_to_port(sdev->host);
1344 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1345 int rc = 0;
1346
1347 ata_scsi_sdev_config(sdev);
1348
1349 if (dev)
1350 rc = ata_scsi_dev_config(sdev, dev);
1351
1352 return rc;
1353}
1354
1355/**
1356 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1357 * @sdev: SCSI device to be destroyed
1358 *
1359 * @sdev is about to be destroyed for hot/warm unplugging. If
1360 * this unplugging was initiated by libata as indicated by NULL
1361 * dev->sdev, this function doesn't have to do anything.
1362 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1363 * Clear dev->sdev, schedule the device for ATA detach and invoke
1364 * EH.
1365 *
1366 * LOCKING:
1367 * Defined by SCSI layer. We don't really care.
1368 */
1369void ata_scsi_slave_destroy(struct scsi_device *sdev)
1370{
1371 struct ata_port *ap = ata_shost_to_port(sdev->host);
1372 struct request_queue *q = sdev->request_queue;
1373 unsigned long flags;
1374 struct ata_device *dev;
1375
1376 if (!ap->ops->error_handler)
1377 return;
1378
1379 spin_lock_irqsave(ap->lock, flags);
1380 dev = __ata_scsi_find_dev(ap, sdev);
1381 if (dev && dev->sdev) {
1382 /* SCSI device already in CANCEL state, no need to offline it */
1383 dev->sdev = NULL;
1384 dev->flags |= ATA_DFLAG_DETACH;
1385 ata_port_schedule_eh(ap);
1386 }
1387 spin_unlock_irqrestore(ap->lock, flags);
1388
1389 kfree(q->dma_drain_buffer);
1390 q->dma_drain_buffer = NULL;
1391 q->dma_drain_size = 0;
1392}
1393
1394/**
1395 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1396 * @ap: ATA port to which the device change the queue depth
1397 * @sdev: SCSI device to configure queue depth for
1398 * @queue_depth: new queue depth
1399 *
1400 * libsas and libata have different approaches for associating a sdev to
1401 * its ata_port.
1402 *
1403 */
1404int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1405 int queue_depth)
1406{
1407 struct ata_device *dev;
1408 unsigned long flags;
1409
1410 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1411 return sdev->queue_depth;
1412
1413 dev = ata_scsi_find_dev(ap, sdev);
1414 if (!dev || !ata_dev_enabled(dev))
1415 return sdev->queue_depth;
1416
1417 /* NCQ enabled? */
1418 spin_lock_irqsave(ap->lock, flags);
1419 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1420 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1421 dev->flags |= ATA_DFLAG_NCQ_OFF;
1422 queue_depth = 1;
1423 }
1424 spin_unlock_irqrestore(ap->lock, flags);
1425
1426 /* limit and apply queue depth */
1427 queue_depth = min(queue_depth, sdev->host->can_queue);
1428 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1429 queue_depth = min(queue_depth, ATA_MAX_QUEUE);
1430
1431 if (sdev->queue_depth == queue_depth)
1432 return -EINVAL;
1433
1434 return scsi_change_queue_depth(sdev, queue_depth);
1435}
1436
1437/**
1438 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1439 * @sdev: SCSI device to configure queue depth for
1440 * @queue_depth: new queue depth
1441 *
1442 * This is libata standard hostt->change_queue_depth callback.
1443 * SCSI will call into this callback when user tries to set queue
1444 * depth via sysfs.
1445 *
1446 * LOCKING:
1447 * SCSI layer (we don't care)
1448 *
1449 * RETURNS:
1450 * Newly configured queue depth.
1451 */
1452int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1453{
1454 struct ata_port *ap = ata_shost_to_port(sdev->host);
1455
1456 return __ata_change_queue_depth(ap, sdev, queue_depth);
1457}
1458
1459/**
1460 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1461 * @qc: Storage for translated ATA taskfile
1462 *
1463 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1464 * (to start). Perhaps these commands should be preceded by
1465 * CHECK POWER MODE to see what power mode the device is already in.
1466 * [See SAT revision 5 at www.t10.org]
1467 *
1468 * LOCKING:
1469 * spin_lock_irqsave(host lock)
1470 *
1471 * RETURNS:
1472 * Zero on success, non-zero on error.
1473 */
1474static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1475{
1476 struct scsi_cmnd *scmd = qc->scsicmd;
1477 struct ata_taskfile *tf = &qc->tf;
1478 const u8 *cdb = scmd->cmnd;
1479 u16 fp;
1480 u8 bp = 0xff;
1481
1482 if (scmd->cmd_len < 5) {
1483 fp = 4;
1484 goto invalid_fld;
1485 }
1486
1487 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1488 tf->protocol = ATA_PROT_NODATA;
1489 if (cdb[1] & 0x1) {
1490 ; /* ignore IMMED bit, violates sat-r05 */
1491 }
1492 if (cdb[4] & 0x2) {
1493 fp = 4;
1494 bp = 1;
1495 goto invalid_fld; /* LOEJ bit set not supported */
1496 }
1497 if (((cdb[4] >> 4) & 0xf) != 0) {
1498 fp = 4;
1499 bp = 3;
1500 goto invalid_fld; /* power conditions not supported */
1501 }
1502
1503 if (cdb[4] & 0x1) {
1504 tf->nsect = 1; /* 1 sector, lba=0 */
1505
1506 if (qc->dev->flags & ATA_DFLAG_LBA) {
1507 tf->flags |= ATA_TFLAG_LBA;
1508
1509 tf->lbah = 0x0;
1510 tf->lbam = 0x0;
1511 tf->lbal = 0x0;
1512 tf->device |= ATA_LBA;
1513 } else {
1514 /* CHS */
1515 tf->lbal = 0x1; /* sect */
1516 tf->lbam = 0x0; /* cyl low */
1517 tf->lbah = 0x0; /* cyl high */
1518 }
1519
1520 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1521 } else {
1522 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1523 * or S5) causing some drives to spin up and down again.
1524 */
1525 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1526 system_state == SYSTEM_POWER_OFF)
1527 goto skip;
1528
1529 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1530 system_entering_hibernation())
1531 goto skip;
1532
1533 /* Issue ATA STANDBY IMMEDIATE command */
1534 tf->command = ATA_CMD_STANDBYNOW1;
1535 }
1536
1537 /*
1538 * Standby and Idle condition timers could be implemented but that
1539 * would require libata to implement the Power condition mode page
1540 * and allow the user to change it. Changing mode pages requires
1541 * MODE SELECT to be implemented.
1542 */
1543
1544 return 0;
1545
1546 invalid_fld:
1547 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1548 return 1;
1549 skip:
1550 scmd->result = SAM_STAT_GOOD;
1551 return 1;
1552}
1553
1554
1555/**
1556 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1557 * @qc: Storage for translated ATA taskfile
1558 *
1559 * Sets up an ATA taskfile to issue FLUSH CACHE or
1560 * FLUSH CACHE EXT.
1561 *
1562 * LOCKING:
1563 * spin_lock_irqsave(host lock)
1564 *
1565 * RETURNS:
1566 * Zero on success, non-zero on error.
1567 */
1568static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1569{
1570 struct ata_taskfile *tf = &qc->tf;
1571
1572 tf->flags |= ATA_TFLAG_DEVICE;
1573 tf->protocol = ATA_PROT_NODATA;
1574
1575 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1576 tf->command = ATA_CMD_FLUSH_EXT;
1577 else
1578 tf->command = ATA_CMD_FLUSH;
1579
1580 /* flush is critical for IO integrity, consider it an IO command */
1581 qc->flags |= ATA_QCFLAG_IO;
1582
1583 return 0;
1584}
1585
1586/**
1587 * scsi_6_lba_len - Get LBA and transfer length
1588 * @cdb: SCSI command to translate
1589 *
1590 * Calculate LBA and transfer length for 6-byte commands.
1591 *
1592 * RETURNS:
1593 * @plba: the LBA
1594 * @plen: the transfer length
1595 */
1596static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1597{
1598 u64 lba = 0;
1599 u32 len;
1600
1601 VPRINTK("six-byte command\n");
1602
1603 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1604 lba |= ((u64)cdb[2]) << 8;
1605 lba |= ((u64)cdb[3]);
1606
1607 len = cdb[4];
1608
1609 *plba = lba;
1610 *plen = len;
1611}
1612
1613/**
1614 * scsi_10_lba_len - Get LBA and transfer length
1615 * @cdb: SCSI command to translate
1616 *
1617 * Calculate LBA and transfer length for 10-byte commands.
1618 *
1619 * RETURNS:
1620 * @plba: the LBA
1621 * @plen: the transfer length
1622 */
1623static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1624{
1625 u64 lba = 0;
1626 u32 len = 0;
1627
1628 VPRINTK("ten-byte command\n");
1629
1630 lba |= ((u64)cdb[2]) << 24;
1631 lba |= ((u64)cdb[3]) << 16;
1632 lba |= ((u64)cdb[4]) << 8;
1633 lba |= ((u64)cdb[5]);
1634
1635 len |= ((u32)cdb[7]) << 8;
1636 len |= ((u32)cdb[8]);
1637
1638 *plba = lba;
1639 *plen = len;
1640}
1641
1642/**
1643 * scsi_16_lba_len - Get LBA and transfer length
1644 * @cdb: SCSI command to translate
1645 *
1646 * Calculate LBA and transfer length for 16-byte commands.
1647 *
1648 * RETURNS:
1649 * @plba: the LBA
1650 * @plen: the transfer length
1651 */
1652static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1653{
1654 u64 lba = 0;
1655 u32 len = 0;
1656
1657 VPRINTK("sixteen-byte command\n");
1658
1659 lba |= ((u64)cdb[2]) << 56;
1660 lba |= ((u64)cdb[3]) << 48;
1661 lba |= ((u64)cdb[4]) << 40;
1662 lba |= ((u64)cdb[5]) << 32;
1663 lba |= ((u64)cdb[6]) << 24;
1664 lba |= ((u64)cdb[7]) << 16;
1665 lba |= ((u64)cdb[8]) << 8;
1666 lba |= ((u64)cdb[9]);
1667
1668 len |= ((u32)cdb[10]) << 24;
1669 len |= ((u32)cdb[11]) << 16;
1670 len |= ((u32)cdb[12]) << 8;
1671 len |= ((u32)cdb[13]);
1672
1673 *plba = lba;
1674 *plen = len;
1675}
1676
1677/**
1678 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1679 * @qc: Storage for translated ATA taskfile
1680 *
1681 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1682 *
1683 * LOCKING:
1684 * spin_lock_irqsave(host lock)
1685 *
1686 * RETURNS:
1687 * Zero on success, non-zero on error.
1688 */
1689static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1690{
1691 struct scsi_cmnd *scmd = qc->scsicmd;
1692 struct ata_taskfile *tf = &qc->tf;
1693 struct ata_device *dev = qc->dev;
1694 u64 dev_sectors = qc->dev->n_sectors;
1695 const u8 *cdb = scmd->cmnd;
1696 u64 block;
1697 u32 n_block;
1698 u16 fp;
1699
1700 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1701 tf->protocol = ATA_PROT_NODATA;
1702
1703 if (cdb[0] == VERIFY) {
1704 if (scmd->cmd_len < 10) {
1705 fp = 9;
1706 goto invalid_fld;
1707 }
1708 scsi_10_lba_len(cdb, &block, &n_block);
1709 } else if (cdb[0] == VERIFY_16) {
1710 if (scmd->cmd_len < 16) {
1711 fp = 15;
1712 goto invalid_fld;
1713 }
1714 scsi_16_lba_len(cdb, &block, &n_block);
1715 } else {
1716 fp = 0;
1717 goto invalid_fld;
1718 }
1719
1720 if (!n_block)
1721 goto nothing_to_do;
1722 if (block >= dev_sectors)
1723 goto out_of_range;
1724 if ((block + n_block) > dev_sectors)
1725 goto out_of_range;
1726
1727 if (dev->flags & ATA_DFLAG_LBA) {
1728 tf->flags |= ATA_TFLAG_LBA;
1729
1730 if (lba_28_ok(block, n_block)) {
1731 /* use LBA28 */
1732 tf->command = ATA_CMD_VERIFY;
1733 tf->device |= (block >> 24) & 0xf;
1734 } else if (lba_48_ok(block, n_block)) {
1735 if (!(dev->flags & ATA_DFLAG_LBA48))
1736 goto out_of_range;
1737
1738 /* use LBA48 */
1739 tf->flags |= ATA_TFLAG_LBA48;
1740 tf->command = ATA_CMD_VERIFY_EXT;
1741
1742 tf->hob_nsect = (n_block >> 8) & 0xff;
1743
1744 tf->hob_lbah = (block >> 40) & 0xff;
1745 tf->hob_lbam = (block >> 32) & 0xff;
1746 tf->hob_lbal = (block >> 24) & 0xff;
1747 } else
1748 /* request too large even for LBA48 */
1749 goto out_of_range;
1750
1751 tf->nsect = n_block & 0xff;
1752
1753 tf->lbah = (block >> 16) & 0xff;
1754 tf->lbam = (block >> 8) & 0xff;
1755 tf->lbal = block & 0xff;
1756
1757 tf->device |= ATA_LBA;
1758 } else {
1759 /* CHS */
1760 u32 sect, head, cyl, track;
1761
1762 if (!lba_28_ok(block, n_block))
1763 goto out_of_range;
1764
1765 /* Convert LBA to CHS */
1766 track = (u32)block / dev->sectors;
1767 cyl = track / dev->heads;
1768 head = track % dev->heads;
1769 sect = (u32)block % dev->sectors + 1;
1770
1771 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1772 (u32)block, track, cyl, head, sect);
1773
1774 /* Check whether the converted CHS can fit.
1775 Cylinder: 0-65535
1776 Head: 0-15
1777 Sector: 1-255*/
1778 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1779 goto out_of_range;
1780
1781 tf->command = ATA_CMD_VERIFY;
1782 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1783 tf->lbal = sect;
1784 tf->lbam = cyl;
1785 tf->lbah = cyl >> 8;
1786 tf->device |= head;
1787 }
1788
1789 return 0;
1790
1791invalid_fld:
1792 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1793 return 1;
1794
1795out_of_range:
1796 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1797 /* "Logical Block Address out of range" */
1798 return 1;
1799
1800nothing_to_do:
1801 scmd->result = SAM_STAT_GOOD;
1802 return 1;
1803}
1804
1805/**
1806 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1807 * @qc: Storage for translated ATA taskfile
1808 *
1809 * Converts any of six SCSI read/write commands into the
1810 * ATA counterpart, including starting sector (LBA),
1811 * sector count, and taking into account the device's LBA48
1812 * support.
1813 *
1814 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1815 * %WRITE_16 are currently supported.
1816 *
1817 * LOCKING:
1818 * spin_lock_irqsave(host lock)
1819 *
1820 * RETURNS:
1821 * Zero on success, non-zero on error.
1822 */
1823static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1824{
1825 struct scsi_cmnd *scmd = qc->scsicmd;
1826 const u8 *cdb = scmd->cmnd;
1827 struct request *rq = scmd->request;
1828 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1829 unsigned int tf_flags = 0;
1830 u64 block;
1831 u32 n_block;
1832 int rc;
1833 u16 fp = 0;
1834
1835 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1836 tf_flags |= ATA_TFLAG_WRITE;
1837
1838 /* Calculate the SCSI LBA, transfer length and FUA. */
1839 switch (cdb[0]) {
1840 case READ_10:
1841 case WRITE_10:
1842 if (unlikely(scmd->cmd_len < 10)) {
1843 fp = 9;
1844 goto invalid_fld;
1845 }
1846 scsi_10_lba_len(cdb, &block, &n_block);
1847 if (cdb[1] & (1 << 3))
1848 tf_flags |= ATA_TFLAG_FUA;
1849 break;
1850 case READ_6:
1851 case WRITE_6:
1852 if (unlikely(scmd->cmd_len < 6)) {
1853 fp = 5;
1854 goto invalid_fld;
1855 }
1856 scsi_6_lba_len(cdb, &block, &n_block);
1857
1858 /* for 6-byte r/w commands, transfer length 0
1859 * means 256 blocks of data, not 0 block.
1860 */
1861 if (!n_block)
1862 n_block = 256;
1863 break;
1864 case READ_16:
1865 case WRITE_16:
1866 if (unlikely(scmd->cmd_len < 16)) {
1867 fp = 15;
1868 goto invalid_fld;
1869 }
1870 scsi_16_lba_len(cdb, &block, &n_block);
1871 if (cdb[1] & (1 << 3))
1872 tf_flags |= ATA_TFLAG_FUA;
1873 break;
1874 default:
1875 DPRINTK("no-byte command\n");
1876 fp = 0;
1877 goto invalid_fld;
1878 }
1879
1880 /* Check and compose ATA command */
1881 if (!n_block)
1882 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1883 * length 0 means transfer 0 block of data.
1884 * However, for ATA R/W commands, sector count 0 means
1885 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1886 *
1887 * WARNING: one or two older ATA drives treat 0 as 0...
1888 */
1889 goto nothing_to_do;
1890
1891 qc->flags |= ATA_QCFLAG_IO;
1892 qc->nbytes = n_block * scmd->device->sector_size;
1893
1894 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1895 qc->hw_tag, class);
1896
1897 if (likely(rc == 0))
1898 return 0;
1899
1900 if (rc == -ERANGE)
1901 goto out_of_range;
1902 /* treat all other errors as -EINVAL, fall through */
1903invalid_fld:
1904 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1905 return 1;
1906
1907out_of_range:
1908 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1909 /* "Logical Block Address out of range" */
1910 return 1;
1911
1912nothing_to_do:
1913 scmd->result = SAM_STAT_GOOD;
1914 return 1;
1915}
1916
1917static void ata_qc_done(struct ata_queued_cmd *qc)
1918{
1919 struct scsi_cmnd *cmd = qc->scsicmd;
1920 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1921
1922 ata_qc_free(qc);
1923 done(cmd);
1924}
1925
1926static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1927{
1928 struct ata_port *ap = qc->ap;
1929 struct scsi_cmnd *cmd = qc->scsicmd;
1930 u8 *cdb = cmd->cmnd;
1931 int need_sense = (qc->err_mask != 0);
1932
1933 /* For ATA pass thru (SAT) commands, generate a sense block if
1934 * user mandated it or if there's an error. Note that if we
1935 * generate because the user forced us to [CK_COND =1], a check
1936 * condition is generated and the ATA register values are returned
1937 * whether the command completed successfully or not. If there
1938 * was no error, we use the following sense data:
1939 * sk = RECOVERED ERROR
1940 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1941 */
1942 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1943 ((cdb[2] & 0x20) || need_sense))
1944 ata_gen_passthru_sense(qc);
1945 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1946 cmd->result = SAM_STAT_CHECK_CONDITION;
1947 else if (need_sense)
1948 ata_gen_ata_sense(qc);
1949 else
1950 cmd->result = SAM_STAT_GOOD;
1951
1952 if (need_sense && !ap->ops->error_handler)
1953 ata_dump_status(ap->print_id, &qc->result_tf);
1954
1955 ata_qc_done(qc);
1956}
1957
1958/**
1959 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1960 * @dev: ATA device to which the command is addressed
1961 * @cmd: SCSI command to execute
1962 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1963 *
1964 * Our ->queuecommand() function has decided that the SCSI
1965 * command issued can be directly translated into an ATA
1966 * command, rather than handled internally.
1967 *
1968 * This function sets up an ata_queued_cmd structure for the
1969 * SCSI command, and sends that ata_queued_cmd to the hardware.
1970 *
1971 * The xlat_func argument (actor) returns 0 if ready to execute
1972 * ATA command, else 1 to finish translation. If 1 is returned
1973 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1974 * to be set reflecting an error condition or clean (early)
1975 * termination.
1976 *
1977 * LOCKING:
1978 * spin_lock_irqsave(host lock)
1979 *
1980 * RETURNS:
1981 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1982 * needs to be deferred.
1983 */
1984static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1985 ata_xlat_func_t xlat_func)
1986{
1987 struct ata_port *ap = dev->link->ap;
1988 struct ata_queued_cmd *qc;
1989 int rc;
1990
1991 VPRINTK("ENTER\n");
1992
1993 qc = ata_scsi_qc_new(dev, cmd);
1994 if (!qc)
1995 goto err_mem;
1996
1997 /* data is present; dma-map it */
1998 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1999 cmd->sc_data_direction == DMA_TO_DEVICE) {
2000 if (unlikely(scsi_bufflen(cmd) < 1)) {
2001 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2002 goto err_did;
2003 }
2004
2005 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2006
2007 qc->dma_dir = cmd->sc_data_direction;
2008 }
2009
2010 qc->complete_fn = ata_scsi_qc_complete;
2011
2012 if (xlat_func(qc))
2013 goto early_finish;
2014
2015 if (ap->ops->qc_defer) {
2016 if ((rc = ap->ops->qc_defer(qc)))
2017 goto defer;
2018 }
2019
2020 /* select device, send command to hardware */
2021 ata_qc_issue(qc);
2022
2023 VPRINTK("EXIT\n");
2024 return 0;
2025
2026early_finish:
2027 ata_qc_free(qc);
2028 cmd->scsi_done(cmd);
2029 DPRINTK("EXIT - early finish (good or error)\n");
2030 return 0;
2031
2032err_did:
2033 ata_qc_free(qc);
2034 cmd->result = (DID_ERROR << 16);
2035 cmd->scsi_done(cmd);
2036err_mem:
2037 DPRINTK("EXIT - internal\n");
2038 return 0;
2039
2040defer:
2041 ata_qc_free(qc);
2042 DPRINTK("EXIT - defer\n");
2043 if (rc == ATA_DEFER_LINK)
2044 return SCSI_MLQUEUE_DEVICE_BUSY;
2045 else
2046 return SCSI_MLQUEUE_HOST_BUSY;
2047}
2048
2049struct ata_scsi_args {
2050 struct ata_device *dev;
2051 u16 *id;
2052 struct scsi_cmnd *cmd;
2053};
2054
2055/**
2056 * ata_scsi_rbuf_get - Map response buffer.
2057 * @cmd: SCSI command containing buffer to be mapped.
2058 * @flags: unsigned long variable to store irq enable status
2059 * @copy_in: copy in from user buffer
2060 *
2061 * Prepare buffer for simulated SCSI commands.
2062 *
2063 * LOCKING:
2064 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2065 *
2066 * RETURNS:
2067 * Pointer to response buffer.
2068 */
2069static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2070 unsigned long *flags)
2071{
2072 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2073
2074 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2075 if (copy_in)
2076 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2077 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2078 return ata_scsi_rbuf;
2079}
2080
2081/**
2082 * ata_scsi_rbuf_put - Unmap response buffer.
2083 * @cmd: SCSI command containing buffer to be unmapped.
2084 * @copy_out: copy out result
2085 * @flags: @flags passed to ata_scsi_rbuf_get()
2086 *
2087 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2088 * @copy_back is true.
2089 *
2090 * LOCKING:
2091 * Unlocks ata_scsi_rbuf_lock.
2092 */
2093static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2094 unsigned long *flags)
2095{
2096 if (copy_out)
2097 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2098 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2099 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2100}
2101
2102/**
2103 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2104 * @args: device IDENTIFY data / SCSI command of interest.
2105 * @actor: Callback hook for desired SCSI command simulator
2106 *
2107 * Takes care of the hard work of simulating a SCSI command...
2108 * Mapping the response buffer, calling the command's handler,
2109 * and handling the handler's return value. This return value
2110 * indicates whether the handler wishes the SCSI command to be
2111 * completed successfully (0), or not (in which case cmd->result
2112 * and sense buffer are assumed to be set).
2113 *
2114 * LOCKING:
2115 * spin_lock_irqsave(host lock)
2116 */
2117static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2118 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2119{
2120 u8 *rbuf;
2121 unsigned int rc;
2122 struct scsi_cmnd *cmd = args->cmd;
2123 unsigned long flags;
2124
2125 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2126 rc = actor(args, rbuf);
2127 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2128
2129 if (rc == 0)
2130 cmd->result = SAM_STAT_GOOD;
2131}
2132
2133/**
2134 * ata_scsiop_inq_std - Simulate INQUIRY command
2135 * @args: device IDENTIFY data / SCSI command of interest.
2136 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2137 *
2138 * Returns standard device identification data associated
2139 * with non-VPD INQUIRY command output.
2140 *
2141 * LOCKING:
2142 * spin_lock_irqsave(host lock)
2143 */
2144static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2145{
2146 static const u8 versions[] = {
2147 0x00,
2148 0x60, /* SAM-3 (no version claimed) */
2149
2150 0x03,
2151 0x20, /* SBC-2 (no version claimed) */
2152
2153 0x03,
2154 0x00 /* SPC-3 (no version claimed) */
2155 };
2156 static const u8 versions_zbc[] = {
2157 0x00,
2158 0xA0, /* SAM-5 (no version claimed) */
2159
2160 0x06,
2161 0x00, /* SBC-4 (no version claimed) */
2162
2163 0x05,
2164 0xC0, /* SPC-5 (no version claimed) */
2165
2166 0x60,
2167 0x24, /* ZBC r05 */
2168 };
2169
2170 u8 hdr[] = {
2171 TYPE_DISK,
2172 0,
2173 0x5, /* claim SPC-3 version compatibility */
2174 2,
2175 95 - 4,
2176 0,
2177 0,
2178 2
2179 };
2180
2181 VPRINTK("ENTER\n");
2182
2183 /* set scsi removable (RMB) bit per ata bit, or if the
2184 * AHCI port says it's external (Hotplug-capable, eSATA).
2185 */
2186 if (ata_id_removable(args->id) ||
2187 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2188 hdr[1] |= (1 << 7);
2189
2190 if (args->dev->class == ATA_DEV_ZAC) {
2191 hdr[0] = TYPE_ZBC;
2192 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2193 }
2194
2195 memcpy(rbuf, hdr, sizeof(hdr));
2196 memcpy(&rbuf[8], "ATA ", 8);
2197 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2198
2199 /* From SAT, use last 2 words from fw rev unless they are spaces */
2200 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2201 if (strncmp(&rbuf[32], " ", 4) == 0)
2202 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2203
2204 if (rbuf[32] == 0 || rbuf[32] == ' ')
2205 memcpy(&rbuf[32], "n/a ", 4);
2206
2207 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2208 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2209 else
2210 memcpy(rbuf + 58, versions, sizeof(versions));
2211
2212 return 0;
2213}
2214
2215/**
2216 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2217 * @args: device IDENTIFY data / SCSI command of interest.
2218 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2219 *
2220 * Returns list of inquiry VPD pages available.
2221 *
2222 * LOCKING:
2223 * spin_lock_irqsave(host lock)
2224 */
2225static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2226{
2227 int num_pages;
2228 static const u8 pages[] = {
2229 0x00, /* page 0x00, this page */
2230 0x80, /* page 0x80, unit serial no page */
2231 0x83, /* page 0x83, device ident page */
2232 0x89, /* page 0x89, ata info page */
2233 0xb0, /* page 0xb0, block limits page */
2234 0xb1, /* page 0xb1, block device characteristics page */
2235 0xb2, /* page 0xb2, thin provisioning page */
2236 0xb6, /* page 0xb6, zoned block device characteristics */
2237 };
2238
2239 num_pages = sizeof(pages);
2240 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2241 num_pages--;
2242 rbuf[3] = num_pages; /* number of supported VPD pages */
2243 memcpy(rbuf + 4, pages, num_pages);
2244 return 0;
2245}
2246
2247/**
2248 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2249 * @args: device IDENTIFY data / SCSI command of interest.
2250 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2251 *
2252 * Returns ATA device serial number.
2253 *
2254 * LOCKING:
2255 * spin_lock_irqsave(host lock)
2256 */
2257static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2258{
2259 static const u8 hdr[] = {
2260 0,
2261 0x80, /* this page code */
2262 0,
2263 ATA_ID_SERNO_LEN, /* page len */
2264 };
2265
2266 memcpy(rbuf, hdr, sizeof(hdr));
2267 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2268 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2269 return 0;
2270}
2271
2272/**
2273 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2274 * @args: device IDENTIFY data / SCSI command of interest.
2275 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2276 *
2277 * Yields two logical unit device identification designators:
2278 * - vendor specific ASCII containing the ATA serial number
2279 * - SAT defined "t10 vendor id based" containing ASCII vendor
2280 * name ("ATA "), model and serial numbers.
2281 *
2282 * LOCKING:
2283 * spin_lock_irqsave(host lock)
2284 */
2285static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2286{
2287 const int sat_model_serial_desc_len = 68;
2288 int num;
2289
2290 rbuf[1] = 0x83; /* this page code */
2291 num = 4;
2292
2293 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2294 rbuf[num + 0] = 2;
2295 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2296 num += 4;
2297 ata_id_string(args->id, (unsigned char *) rbuf + num,
2298 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2299 num += ATA_ID_SERNO_LEN;
2300
2301 /* SAT defined lu model and serial numbers descriptor */
2302 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2303 rbuf[num + 0] = 2;
2304 rbuf[num + 1] = 1;
2305 rbuf[num + 3] = sat_model_serial_desc_len;
2306 num += 4;
2307 memcpy(rbuf + num, "ATA ", 8);
2308 num += 8;
2309 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2310 ATA_ID_PROD_LEN);
2311 num += ATA_ID_PROD_LEN;
2312 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2313 ATA_ID_SERNO_LEN);
2314 num += ATA_ID_SERNO_LEN;
2315
2316 if (ata_id_has_wwn(args->id)) {
2317 /* SAT defined lu world wide name */
2318 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2319 rbuf[num + 0] = 1;
2320 rbuf[num + 1] = 3;
2321 rbuf[num + 3] = ATA_ID_WWN_LEN;
2322 num += 4;
2323 ata_id_string(args->id, (unsigned char *) rbuf + num,
2324 ATA_ID_WWN, ATA_ID_WWN_LEN);
2325 num += ATA_ID_WWN_LEN;
2326 }
2327 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2328 return 0;
2329}
2330
2331/**
2332 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2333 * @args: device IDENTIFY data / SCSI command of interest.
2334 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2335 *
2336 * Yields SAT-specified ATA VPD page.
2337 *
2338 * LOCKING:
2339 * spin_lock_irqsave(host lock)
2340 */
2341static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2342{
2343 struct ata_taskfile tf;
2344
2345 memset(&tf, 0, sizeof(tf));
2346
2347 rbuf[1] = 0x89; /* our page code */
2348 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2349 rbuf[3] = (0x238 & 0xff);
2350
2351 memcpy(&rbuf[8], "linux ", 8);
2352 memcpy(&rbuf[16], "libata ", 16);
2353 memcpy(&rbuf[32], DRV_VERSION, 4);
2354
2355 /* we don't store the ATA device signature, so we fake it */
2356
2357 tf.command = ATA_DRDY; /* really, this is Status reg */
2358 tf.lbal = 0x1;
2359 tf.nsect = 0x1;
2360
2361 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2362 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2363
2364 rbuf[56] = ATA_CMD_ID_ATA;
2365
2366 memcpy(&rbuf[60], &args->id[0], 512);
2367 return 0;
2368}
2369
2370static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2371{
2372 u16 min_io_sectors;
2373
2374 rbuf[1] = 0xb0;
2375 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2376
2377 /*
2378 * Optimal transfer length granularity.
2379 *
2380 * This is always one physical block, but for disks with a smaller
2381 * logical than physical sector size we need to figure out what the
2382 * latter is.
2383 */
2384 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2385 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2386
2387 /*
2388 * Optimal unmap granularity.
2389 *
2390 * The ATA spec doesn't even know about a granularity or alignment
2391 * for the TRIM command. We can leave away most of the unmap related
2392 * VPD page entries, but we have specifify a granularity to signal
2393 * that we support some form of unmap - in thise case via WRITE SAME
2394 * with the unmap bit set.
2395 */
2396 if (ata_id_has_trim(args->id)) {
2397 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2398 put_unaligned_be32(1, &rbuf[28]);
2399 }
2400
2401 return 0;
2402}
2403
2404static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2405{
2406 int form_factor = ata_id_form_factor(args->id);
2407 int media_rotation_rate = ata_id_rotation_rate(args->id);
2408 u8 zoned = ata_id_zoned_cap(args->id);
2409
2410 rbuf[1] = 0xb1;
2411 rbuf[3] = 0x3c;
2412 rbuf[4] = media_rotation_rate >> 8;
2413 rbuf[5] = media_rotation_rate;
2414 rbuf[7] = form_factor;
2415 if (zoned)
2416 rbuf[8] = (zoned << 4);
2417
2418 return 0;
2419}
2420
2421static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2422{
2423 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2424 rbuf[1] = 0xb2;
2425 rbuf[3] = 0x4;
2426 rbuf[5] = 1 << 6; /* TPWS */
2427
2428 return 0;
2429}
2430
2431static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2432{
2433 /*
2434 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2435 */
2436 rbuf[1] = 0xb6;
2437 rbuf[3] = 0x3C;
2438
2439 /*
2440 * URSWRZ bit is only meaningful for host-managed ZAC drives
2441 */
2442 if (args->dev->zac_zoned_cap & 1)
2443 rbuf[4] |= 1;
2444 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2445 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2446 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2447
2448 return 0;
2449}
2450
2451/**
2452 * modecpy - Prepare response for MODE SENSE
2453 * @dest: output buffer
2454 * @src: data being copied
2455 * @n: length of mode page
2456 * @changeable: whether changeable parameters are requested
2457 *
2458 * Generate a generic MODE SENSE page for either current or changeable
2459 * parameters.
2460 *
2461 * LOCKING:
2462 * None.
2463 */
2464static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2465{
2466 if (changeable) {
2467 memcpy(dest, src, 2);
2468 memset(dest + 2, 0, n - 2);
2469 } else {
2470 memcpy(dest, src, n);
2471 }
2472}
2473
2474/**
2475 * ata_msense_caching - Simulate MODE SENSE caching info page
2476 * @id: device IDENTIFY data
2477 * @buf: output buffer
2478 * @changeable: whether changeable parameters are requested
2479 *
2480 * Generate a caching info page, which conditionally indicates
2481 * write caching to the SCSI layer, depending on device
2482 * capabilities.
2483 *
2484 * LOCKING:
2485 * None.
2486 */
2487static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2488{
2489 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2490 if (changeable) {
2491 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2492 } else {
2493 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2494 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2495 }
2496 return sizeof(def_cache_mpage);
2497}
2498
2499/**
2500 * ata_msense_control - Simulate MODE SENSE control mode page
2501 * @dev: ATA device of interest
2502 * @buf: output buffer
2503 * @changeable: whether changeable parameters are requested
2504 *
2505 * Generate a generic MODE SENSE control mode page.
2506 *
2507 * LOCKING:
2508 * None.
2509 */
2510static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2511 bool changeable)
2512{
2513 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2514 if (changeable) {
2515 buf[2] |= (1 << 2); /* ata_mselect_control() */
2516 } else {
2517 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2518
2519 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2520 }
2521 return sizeof(def_control_mpage);
2522}
2523
2524/**
2525 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2526 * @buf: output buffer
2527 * @changeable: whether changeable parameters are requested
2528 *
2529 * Generate a generic MODE SENSE r/w error recovery page.
2530 *
2531 * LOCKING:
2532 * None.
2533 */
2534static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2535{
2536 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2537 changeable);
2538 return sizeof(def_rw_recovery_mpage);
2539}
2540
2541/*
2542 * We can turn this into a real blacklist if it's needed, for now just
2543 * blacklist any Maxtor BANC1G10 revision firmware
2544 */
2545static int ata_dev_supports_fua(u16 *id)
2546{
2547 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2548
2549 if (!libata_fua)
2550 return 0;
2551 if (!ata_id_has_fua(id))
2552 return 0;
2553
2554 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2555 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2556
2557 if (strcmp(model, "Maxtor"))
2558 return 1;
2559 if (strcmp(fw, "BANC1G10"))
2560 return 1;
2561
2562 return 0; /* blacklisted */
2563}
2564
2565/**
2566 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2567 * @args: device IDENTIFY data / SCSI command of interest.
2568 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2569 *
2570 * Simulate MODE SENSE commands. Assume this is invoked for direct
2571 * access devices (e.g. disks) only. There should be no block
2572 * descriptor for other device types.
2573 *
2574 * LOCKING:
2575 * spin_lock_irqsave(host lock)
2576 */
2577static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2578{
2579 struct ata_device *dev = args->dev;
2580 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2581 static const u8 sat_blk_desc[] = {
2582 0, 0, 0, 0, /* number of blocks: sat unspecified */
2583 0,
2584 0, 0x2, 0x0 /* block length: 512 bytes */
2585 };
2586 u8 pg, spg;
2587 unsigned int ebd, page_control, six_byte;
2588 u8 dpofua, bp = 0xff;
2589 u16 fp;
2590
2591 VPRINTK("ENTER\n");
2592
2593 six_byte = (scsicmd[0] == MODE_SENSE);
2594 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2595 /*
2596 * LLBA bit in msense(10) ignored (compliant)
2597 */
2598
2599 page_control = scsicmd[2] >> 6;
2600 switch (page_control) {
2601 case 0: /* current */
2602 case 1: /* changeable */
2603 case 2: /* defaults */
2604 break; /* supported */
2605 case 3: /* saved */
2606 goto saving_not_supp;
2607 default:
2608 fp = 2;
2609 bp = 6;
2610 goto invalid_fld;
2611 }
2612
2613 if (six_byte)
2614 p += 4 + (ebd ? 8 : 0);
2615 else
2616 p += 8 + (ebd ? 8 : 0);
2617
2618 pg = scsicmd[2] & 0x3f;
2619 spg = scsicmd[3];
2620 /*
2621 * No mode subpages supported (yet) but asking for _all_
2622 * subpages may be valid
2623 */
2624 if (spg && (spg != ALL_SUB_MPAGES)) {
2625 fp = 3;
2626 goto invalid_fld;
2627 }
2628
2629 switch(pg) {
2630 case RW_RECOVERY_MPAGE:
2631 p += ata_msense_rw_recovery(p, page_control == 1);
2632 break;
2633
2634 case CACHE_MPAGE:
2635 p += ata_msense_caching(args->id, p, page_control == 1);
2636 break;
2637
2638 case CONTROL_MPAGE:
2639 p += ata_msense_control(args->dev, p, page_control == 1);
2640 break;
2641
2642 case ALL_MPAGES:
2643 p += ata_msense_rw_recovery(p, page_control == 1);
2644 p += ata_msense_caching(args->id, p, page_control == 1);
2645 p += ata_msense_control(args->dev, p, page_control == 1);
2646 break;
2647
2648 default: /* invalid page code */
2649 fp = 2;
2650 goto invalid_fld;
2651 }
2652
2653 dpofua = 0;
2654 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2655 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2656 dpofua = 1 << 4;
2657
2658 if (six_byte) {
2659 rbuf[0] = p - rbuf - 1;
2660 rbuf[2] |= dpofua;
2661 if (ebd) {
2662 rbuf[3] = sizeof(sat_blk_desc);
2663 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2664 }
2665 } else {
2666 unsigned int output_len = p - rbuf - 2;
2667
2668 rbuf[0] = output_len >> 8;
2669 rbuf[1] = output_len;
2670 rbuf[3] |= dpofua;
2671 if (ebd) {
2672 rbuf[7] = sizeof(sat_blk_desc);
2673 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2674 }
2675 }
2676 return 0;
2677
2678invalid_fld:
2679 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2680 return 1;
2681
2682saving_not_supp:
2683 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2684 /* "Saving parameters not supported" */
2685 return 1;
2686}
2687
2688/**
2689 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2690 * @args: device IDENTIFY data / SCSI command of interest.
2691 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2692 *
2693 * Simulate READ CAPACITY commands.
2694 *
2695 * LOCKING:
2696 * None.
2697 */
2698static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2699{
2700 struct ata_device *dev = args->dev;
2701 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2702 u32 sector_size; /* physical sector size in bytes */
2703 u8 log2_per_phys;
2704 u16 lowest_aligned;
2705
2706 sector_size = ata_id_logical_sector_size(dev->id);
2707 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2708 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2709
2710 VPRINTK("ENTER\n");
2711
2712 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2713 if (last_lba >= 0xffffffffULL)
2714 last_lba = 0xffffffff;
2715
2716 /* sector count, 32-bit */
2717 rbuf[0] = last_lba >> (8 * 3);
2718 rbuf[1] = last_lba >> (8 * 2);
2719 rbuf[2] = last_lba >> (8 * 1);
2720 rbuf[3] = last_lba;
2721
2722 /* sector size */
2723 rbuf[4] = sector_size >> (8 * 3);
2724 rbuf[5] = sector_size >> (8 * 2);
2725 rbuf[6] = sector_size >> (8 * 1);
2726 rbuf[7] = sector_size;
2727 } else {
2728 /* sector count, 64-bit */
2729 rbuf[0] = last_lba >> (8 * 7);
2730 rbuf[1] = last_lba >> (8 * 6);
2731 rbuf[2] = last_lba >> (8 * 5);
2732 rbuf[3] = last_lba >> (8 * 4);
2733 rbuf[4] = last_lba >> (8 * 3);
2734 rbuf[5] = last_lba >> (8 * 2);
2735 rbuf[6] = last_lba >> (8 * 1);
2736 rbuf[7] = last_lba;
2737
2738 /* sector size */
2739 rbuf[ 8] = sector_size >> (8 * 3);
2740 rbuf[ 9] = sector_size >> (8 * 2);
2741 rbuf[10] = sector_size >> (8 * 1);
2742 rbuf[11] = sector_size;
2743
2744 rbuf[12] = 0;
2745 rbuf[13] = log2_per_phys;
2746 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2747 rbuf[15] = lowest_aligned;
2748
2749 if (ata_id_has_trim(args->id) &&
2750 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2751 rbuf[14] |= 0x80; /* LBPME */
2752
2753 if (ata_id_has_zero_after_trim(args->id) &&
2754 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2755 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2756 rbuf[14] |= 0x40; /* LBPRZ */
2757 }
2758 }
2759 if (ata_id_zoned_cap(args->id) ||
2760 args->dev->class == ATA_DEV_ZAC)
2761 rbuf[12] = (1 << 4); /* RC_BASIS */
2762 }
2763 return 0;
2764}
2765
2766/**
2767 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2768 * @args: device IDENTIFY data / SCSI command of interest.
2769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2770 *
2771 * Simulate REPORT LUNS command.
2772 *
2773 * LOCKING:
2774 * spin_lock_irqsave(host lock)
2775 */
2776static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2777{
2778 VPRINTK("ENTER\n");
2779 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2780
2781 return 0;
2782}
2783
2784static void atapi_sense_complete(struct ata_queued_cmd *qc)
2785{
2786 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2787 /* FIXME: not quite right; we don't want the
2788 * translation of taskfile registers into
2789 * a sense descriptors, since that's only
2790 * correct for ATA, not ATAPI
2791 */
2792 ata_gen_passthru_sense(qc);
2793 }
2794
2795 ata_qc_done(qc);
2796}
2797
2798/* is it pointless to prefer PIO for "safety reasons"? */
2799static inline int ata_pio_use_silly(struct ata_port *ap)
2800{
2801 return (ap->flags & ATA_FLAG_PIO_DMA);
2802}
2803
2804static void atapi_request_sense(struct ata_queued_cmd *qc)
2805{
2806 struct ata_port *ap = qc->ap;
2807 struct scsi_cmnd *cmd = qc->scsicmd;
2808
2809 DPRINTK("ATAPI request sense\n");
2810
2811 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2812
2813#ifdef CONFIG_ATA_SFF
2814 if (ap->ops->sff_tf_read)
2815 ap->ops->sff_tf_read(ap, &qc->tf);
2816#endif
2817
2818 /* fill these in, for the case where they are -not- overwritten */
2819 cmd->sense_buffer[0] = 0x70;
2820 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2821
2822 ata_qc_reinit(qc);
2823
2824 /* setup sg table and init transfer direction */
2825 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2826 ata_sg_init(qc, &qc->sgent, 1);
2827 qc->dma_dir = DMA_FROM_DEVICE;
2828
2829 memset(&qc->cdb, 0, qc->dev->cdb_len);
2830 qc->cdb[0] = REQUEST_SENSE;
2831 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2832
2833 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2834 qc->tf.command = ATA_CMD_PACKET;
2835
2836 if (ata_pio_use_silly(ap)) {
2837 qc->tf.protocol = ATAPI_PROT_DMA;
2838 qc->tf.feature |= ATAPI_PKT_DMA;
2839 } else {
2840 qc->tf.protocol = ATAPI_PROT_PIO;
2841 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2842 qc->tf.lbah = 0;
2843 }
2844 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2845
2846 qc->complete_fn = atapi_sense_complete;
2847
2848 ata_qc_issue(qc);
2849
2850 DPRINTK("EXIT\n");
2851}
2852
2853/*
2854 * ATAPI devices typically report zero for their SCSI version, and sometimes
2855 * deviate from the spec WRT response data format. If SCSI version is
2856 * reported as zero like normal, then we make the following fixups:
2857 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2858 * modern device.
2859 * 2) Ensure response data format / ATAPI information are always correct.
2860 */
2861static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2862{
2863 u8 buf[4];
2864
2865 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2866 if (buf[2] == 0) {
2867 buf[2] = 0x5;
2868 buf[3] = 0x32;
2869 }
2870 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2871}
2872
2873static void atapi_qc_complete(struct ata_queued_cmd *qc)
2874{
2875 struct scsi_cmnd *cmd = qc->scsicmd;
2876 unsigned int err_mask = qc->err_mask;
2877
2878 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2879
2880 /* handle completion from new EH */
2881 if (unlikely(qc->ap->ops->error_handler &&
2882 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2883
2884 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2885 /* FIXME: not quite right; we don't want the
2886 * translation of taskfile registers into a
2887 * sense descriptors, since that's only
2888 * correct for ATA, not ATAPI
2889 */
2890 ata_gen_passthru_sense(qc);
2891 }
2892
2893 /* SCSI EH automatically locks door if sdev->locked is
2894 * set. Sometimes door lock request continues to
2895 * fail, for example, when no media is present. This
2896 * creates a loop - SCSI EH issues door lock which
2897 * fails and gets invoked again to acquire sense data
2898 * for the failed command.
2899 *
2900 * If door lock fails, always clear sdev->locked to
2901 * avoid this infinite loop.
2902 *
2903 * This may happen before SCSI scan is complete. Make
2904 * sure qc->dev->sdev isn't NULL before dereferencing.
2905 */
2906 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2907 qc->dev->sdev->locked = 0;
2908
2909 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2910 ata_qc_done(qc);
2911 return;
2912 }
2913
2914 /* successful completion or old EH failure path */
2915 if (unlikely(err_mask & AC_ERR_DEV)) {
2916 cmd->result = SAM_STAT_CHECK_CONDITION;
2917 atapi_request_sense(qc);
2918 return;
2919 } else if (unlikely(err_mask)) {
2920 /* FIXME: not quite right; we don't want the
2921 * translation of taskfile registers into
2922 * a sense descriptors, since that's only
2923 * correct for ATA, not ATAPI
2924 */
2925 ata_gen_passthru_sense(qc);
2926 } else {
2927 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2928 atapi_fixup_inquiry(cmd);
2929 cmd->result = SAM_STAT_GOOD;
2930 }
2931
2932 ata_qc_done(qc);
2933}
2934/**
2935 * atapi_xlat - Initialize PACKET taskfile
2936 * @qc: command structure to be initialized
2937 *
2938 * LOCKING:
2939 * spin_lock_irqsave(host lock)
2940 *
2941 * RETURNS:
2942 * Zero on success, non-zero on failure.
2943 */
2944static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2945{
2946 struct scsi_cmnd *scmd = qc->scsicmd;
2947 struct ata_device *dev = qc->dev;
2948 int nodata = (scmd->sc_data_direction == DMA_NONE);
2949 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2950 unsigned int nbytes;
2951
2952 memset(qc->cdb, 0, dev->cdb_len);
2953 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2954
2955 qc->complete_fn = atapi_qc_complete;
2956
2957 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2958 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2959 qc->tf.flags |= ATA_TFLAG_WRITE;
2960 DPRINTK("direction: write\n");
2961 }
2962
2963 qc->tf.command = ATA_CMD_PACKET;
2964 ata_qc_set_pc_nbytes(qc);
2965
2966 /* check whether ATAPI DMA is safe */
2967 if (!nodata && !using_pio && atapi_check_dma(qc))
2968 using_pio = 1;
2969
2970 /* Some controller variants snoop this value for Packet
2971 * transfers to do state machine and FIFO management. Thus we
2972 * want to set it properly, and for DMA where it is
2973 * effectively meaningless.
2974 */
2975 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2976
2977 /* Most ATAPI devices which honor transfer chunk size don't
2978 * behave according to the spec when odd chunk size which
2979 * matches the transfer length is specified. If the number of
2980 * bytes to transfer is 2n+1. According to the spec, what
2981 * should happen is to indicate that 2n+1 is going to be
2982 * transferred and transfer 2n+2 bytes where the last byte is
2983 * padding.
2984 *
2985 * In practice, this doesn't happen. ATAPI devices first
2986 * indicate and transfer 2n bytes and then indicate and
2987 * transfer 2 bytes where the last byte is padding.
2988 *
2989 * This inconsistency confuses several controllers which
2990 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2991 * These controllers use actual number of transferred bytes to
2992 * update DMA pointer and transfer of 4n+2 bytes make those
2993 * controller push DMA pointer by 4n+4 bytes because SATA data
2994 * FISes are aligned to 4 bytes. This causes data corruption
2995 * and buffer overrun.
2996 *
2997 * Always setting nbytes to even number solves this problem
2998 * because then ATAPI devices don't have to split data at 2n
2999 * boundaries.
3000 */
3001 if (nbytes & 0x1)
3002 nbytes++;
3003
3004 qc->tf.lbam = (nbytes & 0xFF);
3005 qc->tf.lbah = (nbytes >> 8);
3006
3007 if (nodata)
3008 qc->tf.protocol = ATAPI_PROT_NODATA;
3009 else if (using_pio)
3010 qc->tf.protocol = ATAPI_PROT_PIO;
3011 else {
3012 /* DMA data xfer */
3013 qc->tf.protocol = ATAPI_PROT_DMA;
3014 qc->tf.feature |= ATAPI_PKT_DMA;
3015
3016 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3017 (scmd->sc_data_direction != DMA_TO_DEVICE))
3018 /* some SATA bridges need us to indicate data xfer direction */
3019 qc->tf.feature |= ATAPI_DMADIR;
3020 }
3021
3022
3023 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3024 as ATAPI tape drives don't get this right otherwise */
3025 return 0;
3026}
3027
3028static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3029{
3030 if (!sata_pmp_attached(ap)) {
3031 if (likely(devno >= 0 &&
3032 devno < ata_link_max_devices(&ap->link)))
3033 return &ap->link.device[devno];
3034 } else {
3035 if (likely(devno >= 0 &&
3036 devno < ap->nr_pmp_links))
3037 return &ap->pmp_link[devno].device[0];
3038 }
3039
3040 return NULL;
3041}
3042
3043static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3044 const struct scsi_device *scsidev)
3045{
3046 int devno;
3047
3048 /* skip commands not addressed to targets we simulate */
3049 if (!sata_pmp_attached(ap)) {
3050 if (unlikely(scsidev->channel || scsidev->lun))
3051 return NULL;
3052 devno = scsidev->id;
3053 } else {
3054 if (unlikely(scsidev->id || scsidev->lun))
3055 return NULL;
3056 devno = scsidev->channel;
3057 }
3058
3059 return ata_find_dev(ap, devno);
3060}
3061
3062/**
3063 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3064 * @ap: ATA port to which the device is attached
3065 * @scsidev: SCSI device from which we derive the ATA device
3066 *
3067 * Given various information provided in struct scsi_cmnd,
3068 * map that onto an ATA bus, and using that mapping
3069 * determine which ata_device is associated with the
3070 * SCSI command to be sent.
3071 *
3072 * LOCKING:
3073 * spin_lock_irqsave(host lock)
3074 *
3075 * RETURNS:
3076 * Associated ATA device, or %NULL if not found.
3077 */
3078static struct ata_device *
3079ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3080{
3081 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3082
3083 if (unlikely(!dev || !ata_dev_enabled(dev)))
3084 return NULL;
3085
3086 return dev;
3087}
3088
3089/*
3090 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3091 * @byte1: Byte 1 from pass-thru CDB.
3092 *
3093 * RETURNS:
3094 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3095 */
3096static u8
3097ata_scsi_map_proto(u8 byte1)
3098{
3099 switch((byte1 & 0x1e) >> 1) {
3100 case 3: /* Non-data */
3101 return ATA_PROT_NODATA;
3102
3103 case 6: /* DMA */
3104 case 10: /* UDMA Data-in */
3105 case 11: /* UDMA Data-Out */
3106 return ATA_PROT_DMA;
3107
3108 case 4: /* PIO Data-in */
3109 case 5: /* PIO Data-out */
3110 return ATA_PROT_PIO;
3111
3112 case 12: /* FPDMA */
3113 return ATA_PROT_NCQ;
3114
3115 case 0: /* Hard Reset */
3116 case 1: /* SRST */
3117 case 8: /* Device Diagnostic */
3118 case 9: /* Device Reset */
3119 case 7: /* DMA Queued */
3120 case 15: /* Return Response Info */
3121 default: /* Reserved */
3122 break;
3123 }
3124
3125 return ATA_PROT_UNKNOWN;
3126}
3127
3128/**
3129 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3130 * @qc: command structure to be initialized
3131 *
3132 * Handles either 12, 16, or 32-byte versions of the CDB.
3133 *
3134 * RETURNS:
3135 * Zero on success, non-zero on failure.
3136 */
3137static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3138{
3139 struct ata_taskfile *tf = &(qc->tf);
3140 struct scsi_cmnd *scmd = qc->scsicmd;
3141 struct ata_device *dev = qc->dev;
3142 const u8 *cdb = scmd->cmnd;
3143 u16 fp;
3144 u16 cdb_offset = 0;
3145
3146 /* 7Fh variable length cmd means a ata pass-thru(32) */
3147 if (cdb[0] == VARIABLE_LENGTH_CMD)
3148 cdb_offset = 9;
3149
3150 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3151 if (tf->protocol == ATA_PROT_UNKNOWN) {
3152 fp = 1;
3153 goto invalid_fld;
3154 }
3155
3156 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0)
3157 tf->protocol = ATA_PROT_NCQ_NODATA;
3158
3159 /* enable LBA */
3160 tf->flags |= ATA_TFLAG_LBA;
3161
3162 /*
3163 * 12 and 16 byte CDBs use different offsets to
3164 * provide the various register values.
3165 */
3166 if (cdb[0] == ATA_16) {
3167 /*
3168 * 16-byte CDB - may contain extended commands.
3169 *
3170 * If that is the case, copy the upper byte register values.
3171 */
3172 if (cdb[1] & 0x01) {
3173 tf->hob_feature = cdb[3];
3174 tf->hob_nsect = cdb[5];
3175 tf->hob_lbal = cdb[7];
3176 tf->hob_lbam = cdb[9];
3177 tf->hob_lbah = cdb[11];
3178 tf->flags |= ATA_TFLAG_LBA48;
3179 } else
3180 tf->flags &= ~ATA_TFLAG_LBA48;
3181
3182 /*
3183 * Always copy low byte, device and command registers.
3184 */
3185 tf->feature = cdb[4];
3186 tf->nsect = cdb[6];
3187 tf->lbal = cdb[8];
3188 tf->lbam = cdb[10];
3189 tf->lbah = cdb[12];
3190 tf->device = cdb[13];
3191 tf->command = cdb[14];
3192 } else if (cdb[0] == ATA_12) {
3193 /*
3194 * 12-byte CDB - incapable of extended commands.
3195 */
3196 tf->flags &= ~ATA_TFLAG_LBA48;
3197
3198 tf->feature = cdb[3];
3199 tf->nsect = cdb[4];
3200 tf->lbal = cdb[5];
3201 tf->lbam = cdb[6];
3202 tf->lbah = cdb[7];
3203 tf->device = cdb[8];
3204 tf->command = cdb[9];
3205 } else {
3206 /*
3207 * 32-byte CDB - may contain extended command fields.
3208 *
3209 * If that is the case, copy the upper byte register values.
3210 */
3211 if (cdb[10] & 0x01) {
3212 tf->hob_feature = cdb[20];
3213 tf->hob_nsect = cdb[22];
3214 tf->hob_lbal = cdb[16];
3215 tf->hob_lbam = cdb[15];
3216 tf->hob_lbah = cdb[14];
3217 tf->flags |= ATA_TFLAG_LBA48;
3218 } else
3219 tf->flags &= ~ATA_TFLAG_LBA48;
3220
3221 tf->feature = cdb[21];
3222 tf->nsect = cdb[23];
3223 tf->lbal = cdb[19];
3224 tf->lbam = cdb[18];
3225 tf->lbah = cdb[17];
3226 tf->device = cdb[24];
3227 tf->command = cdb[25];
3228 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3229 }
3230
3231 /* For NCQ commands copy the tag value */
3232 if (ata_is_ncq(tf->protocol))
3233 tf->nsect = qc->hw_tag << 3;
3234
3235 /* enforce correct master/slave bit */
3236 tf->device = dev->devno ?
3237 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3238
3239 switch (tf->command) {
3240 /* READ/WRITE LONG use a non-standard sect_size */
3241 case ATA_CMD_READ_LONG:
3242 case ATA_CMD_READ_LONG_ONCE:
3243 case ATA_CMD_WRITE_LONG:
3244 case ATA_CMD_WRITE_LONG_ONCE:
3245 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3246 fp = 1;
3247 goto invalid_fld;
3248 }
3249 qc->sect_size = scsi_bufflen(scmd);
3250 break;
3251
3252 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3253 case ATA_CMD_CFA_WRITE_NE:
3254 case ATA_CMD_CFA_TRANS_SECT:
3255 case ATA_CMD_CFA_WRITE_MULT_NE:
3256 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3257 case ATA_CMD_READ:
3258 case ATA_CMD_READ_EXT:
3259 case ATA_CMD_READ_QUEUED:
3260 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3261 case ATA_CMD_FPDMA_READ:
3262 case ATA_CMD_READ_MULTI:
3263 case ATA_CMD_READ_MULTI_EXT:
3264 case ATA_CMD_PIO_READ:
3265 case ATA_CMD_PIO_READ_EXT:
3266 case ATA_CMD_READ_STREAM_DMA_EXT:
3267 case ATA_CMD_READ_STREAM_EXT:
3268 case ATA_CMD_VERIFY:
3269 case ATA_CMD_VERIFY_EXT:
3270 case ATA_CMD_WRITE:
3271 case ATA_CMD_WRITE_EXT:
3272 case ATA_CMD_WRITE_FUA_EXT:
3273 case ATA_CMD_WRITE_QUEUED:
3274 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3275 case ATA_CMD_FPDMA_WRITE:
3276 case ATA_CMD_WRITE_MULTI:
3277 case ATA_CMD_WRITE_MULTI_EXT:
3278 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3279 case ATA_CMD_PIO_WRITE:
3280 case ATA_CMD_PIO_WRITE_EXT:
3281 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3282 case ATA_CMD_WRITE_STREAM_EXT:
3283 qc->sect_size = scmd->device->sector_size;
3284 break;
3285
3286 /* Everything else uses 512 byte "sectors" */
3287 default:
3288 qc->sect_size = ATA_SECT_SIZE;
3289 }
3290
3291 /*
3292 * Set flags so that all registers will be written, pass on
3293 * write indication (used for PIO/DMA setup), result TF is
3294 * copied back and we don't whine too much about its failure.
3295 */
3296 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3297 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3298 tf->flags |= ATA_TFLAG_WRITE;
3299
3300 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3301
3302 /*
3303 * Set transfer length.
3304 *
3305 * TODO: find out if we need to do more here to
3306 * cover scatter/gather case.
3307 */
3308 ata_qc_set_pc_nbytes(qc);
3309
3310 /* We may not issue DMA commands if no DMA mode is set */
3311 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3312 fp = 1;
3313 goto invalid_fld;
3314 }
3315
3316 /* We may not issue NCQ commands to devices not supporting NCQ */
3317 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3318 fp = 1;
3319 goto invalid_fld;
3320 }
3321
3322 /* sanity check for pio multi commands */
3323 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3324 fp = 1;
3325 goto invalid_fld;
3326 }
3327
3328 if (is_multi_taskfile(tf)) {
3329 unsigned int multi_count = 1 << (cdb[1] >> 5);
3330
3331 /* compare the passed through multi_count
3332 * with the cached multi_count of libata
3333 */
3334 if (multi_count != dev->multi_count)
3335 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3336 multi_count);
3337 }
3338
3339 /*
3340 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3341 * SET_FEATURES - XFER MODE must be preceded/succeeded
3342 * by an update to hardware-specific registers for each
3343 * controller (i.e. the reason for ->set_piomode(),
3344 * ->set_dmamode(), and ->post_set_mode() hooks).
3345 */
3346 if (tf->command == ATA_CMD_SET_FEATURES &&
3347 tf->feature == SETFEATURES_XFER) {
3348 fp = (cdb[0] == ATA_16) ? 4 : 3;
3349 goto invalid_fld;
3350 }
3351
3352 /*
3353 * Filter TPM commands by default. These provide an
3354 * essentially uncontrolled encrypted "back door" between
3355 * applications and the disk. Set libata.allow_tpm=1 if you
3356 * have a real reason for wanting to use them. This ensures
3357 * that installed software cannot easily mess stuff up without
3358 * user intent. DVR type users will probably ship with this enabled
3359 * for movie content management.
3360 *
3361 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3362 * for this and should do in future but that it is not sufficient as
3363 * DCS is an optional feature set. Thus we also do the software filter
3364 * so that we comply with the TC consortium stated goal that the user
3365 * can turn off TC features of their system.
3366 */
3367 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3368 fp = (cdb[0] == ATA_16) ? 14 : 9;
3369 goto invalid_fld;
3370 }
3371
3372 return 0;
3373
3374 invalid_fld:
3375 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3376 return 1;
3377}
3378
3379/**
3380 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3381 * @cmd: SCSI command being translated
3382 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3383 * @sector: Starting sector
3384 * @count: Total Range of request in logical sectors
3385 *
3386 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3387 * descriptor.
3388 *
3389 * Upto 64 entries of the format:
3390 * 63:48 Range Length
3391 * 47:0 LBA
3392 *
3393 * Range Length of 0 is ignored.
3394 * LBA's should be sorted order and not overlap.
3395 *
3396 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3397 *
3398 * Return: Number of bytes copied into sglist.
3399 */
3400static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3401 u64 sector, u32 count)
3402{
3403 struct scsi_device *sdp = cmd->device;
3404 size_t len = sdp->sector_size;
3405 size_t r;
3406 __le64 *buf;
3407 u32 i = 0;
3408 unsigned long flags;
3409
3410 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3411
3412 if (len > ATA_SCSI_RBUF_SIZE)
3413 len = ATA_SCSI_RBUF_SIZE;
3414
3415 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3416 buf = ((void *)ata_scsi_rbuf);
3417 memset(buf, 0, len);
3418 while (i < trmax) {
3419 u64 entry = sector |
3420 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3421 buf[i++] = __cpu_to_le64(entry);
3422 if (count <= 0xffff)
3423 break;
3424 count -= 0xffff;
3425 sector += 0xffff;
3426 }
3427 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3428 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3429
3430 return r;
3431}
3432
3433/**
3434 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3435 * @qc: Command to be translated
3436 *
3437 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3438 * an SCT Write Same command.
3439 * Based on WRITE SAME has the UNMAP flag:
3440 *
3441 * - When set translate to DSM TRIM
3442 * - When clear translate to SCT Write Same
3443 */
3444static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3445{
3446 struct ata_taskfile *tf = &qc->tf;
3447 struct scsi_cmnd *scmd = qc->scsicmd;
3448 struct scsi_device *sdp = scmd->device;
3449 size_t len = sdp->sector_size;
3450 struct ata_device *dev = qc->dev;
3451 const u8 *cdb = scmd->cmnd;
3452 u64 block;
3453 u32 n_block;
3454 const u32 trmax = len >> 3;
3455 u32 size;
3456 u16 fp;
3457 u8 bp = 0xff;
3458 u8 unmap = cdb[1] & 0x8;
3459
3460 /* we may not issue DMA commands if no DMA mode is set */
3461 if (unlikely(!dev->dma_mode))
3462 goto invalid_opcode;
3463
3464 /*
3465 * We only allow sending this command through the block layer,
3466 * as it modifies the DATA OUT buffer, which would corrupt user
3467 * memory for SG_IO commands.
3468 */
3469 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3470 goto invalid_opcode;
3471
3472 if (unlikely(scmd->cmd_len < 16)) {
3473 fp = 15;
3474 goto invalid_fld;
3475 }
3476 scsi_16_lba_len(cdb, &block, &n_block);
3477
3478 if (!unmap ||
3479 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3480 !ata_id_has_trim(dev->id)) {
3481 fp = 1;
3482 bp = 3;
3483 goto invalid_fld;
3484 }
3485 /* If the request is too large the cmd is invalid */
3486 if (n_block > 0xffff * trmax) {
3487 fp = 2;
3488 goto invalid_fld;
3489 }
3490
3491 /*
3492 * WRITE SAME always has a sector sized buffer as payload, this
3493 * should never be a multiple entry S/G list.
3494 */
3495 if (!scsi_sg_count(scmd))
3496 goto invalid_param_len;
3497
3498 /*
3499 * size must match sector size in bytes
3500 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3501 * is defined as number of 512 byte blocks to be transferred.
3502 */
3503
3504 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3505 if (size != len)
3506 goto invalid_param_len;
3507
3508 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3509 /* Newer devices support queued TRIM commands */
3510 tf->protocol = ATA_PROT_NCQ;
3511 tf->command = ATA_CMD_FPDMA_SEND;
3512 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3513 tf->nsect = qc->hw_tag << 3;
3514 tf->hob_feature = (size / 512) >> 8;
3515 tf->feature = size / 512;
3516
3517 tf->auxiliary = 1;
3518 } else {
3519 tf->protocol = ATA_PROT_DMA;
3520 tf->hob_feature = 0;
3521 tf->feature = ATA_DSM_TRIM;
3522 tf->hob_nsect = (size / 512) >> 8;
3523 tf->nsect = size / 512;
3524 tf->command = ATA_CMD_DSM;
3525 }
3526
3527 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3528 ATA_TFLAG_WRITE;
3529
3530 ata_qc_set_pc_nbytes(qc);
3531
3532 return 0;
3533
3534invalid_fld:
3535 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3536 return 1;
3537invalid_param_len:
3538 /* "Parameter list length error" */
3539 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3540 return 1;
3541invalid_opcode:
3542 /* "Invalid command operation code" */
3543 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3544 return 1;
3545}
3546
3547/**
3548 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3549 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3550 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3551 *
3552 * Yields a subset to satisfy scsi_report_opcode()
3553 *
3554 * LOCKING:
3555 * spin_lock_irqsave(host lock)
3556 */
3557static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3558{
3559 struct ata_device *dev = args->dev;
3560 u8 *cdb = args->cmd->cmnd;
3561 u8 supported = 0;
3562 unsigned int err = 0;
3563
3564 if (cdb[2] != 1) {
3565 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3566 err = 2;
3567 goto out;
3568 }
3569 switch (cdb[3]) {
3570 case INQUIRY:
3571 case MODE_SENSE:
3572 case MODE_SENSE_10:
3573 case READ_CAPACITY:
3574 case SERVICE_ACTION_IN_16:
3575 case REPORT_LUNS:
3576 case REQUEST_SENSE:
3577 case SYNCHRONIZE_CACHE:
3578 case REZERO_UNIT:
3579 case SEEK_6:
3580 case SEEK_10:
3581 case TEST_UNIT_READY:
3582 case SEND_DIAGNOSTIC:
3583 case MAINTENANCE_IN:
3584 case READ_6:
3585 case READ_10:
3586 case READ_16:
3587 case WRITE_6:
3588 case WRITE_10:
3589 case WRITE_16:
3590 case ATA_12:
3591 case ATA_16:
3592 case VERIFY:
3593 case VERIFY_16:
3594 case MODE_SELECT:
3595 case MODE_SELECT_10:
3596 case START_STOP:
3597 supported = 3;
3598 break;
3599 case ZBC_IN:
3600 case ZBC_OUT:
3601 if (ata_id_zoned_cap(dev->id) ||
3602 dev->class == ATA_DEV_ZAC)
3603 supported = 3;
3604 break;
3605 case SECURITY_PROTOCOL_IN:
3606 case SECURITY_PROTOCOL_OUT:
3607 if (dev->flags & ATA_DFLAG_TRUSTED)
3608 supported = 3;
3609 break;
3610 default:
3611 break;
3612 }
3613out:
3614 rbuf[1] = supported; /* supported */
3615 return err;
3616}
3617
3618/**
3619 * ata_scsi_report_zones_complete - convert ATA output
3620 * @qc: command structure returning the data
3621 *
3622 * Convert T-13 little-endian field representation into
3623 * T-10 big-endian field representation.
3624 * What a mess.
3625 */
3626static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3627{
3628 struct scsi_cmnd *scmd = qc->scsicmd;
3629 struct sg_mapping_iter miter;
3630 unsigned long flags;
3631 unsigned int bytes = 0;
3632
3633 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3634 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3635
3636 local_irq_save(flags);
3637 while (sg_miter_next(&miter)) {
3638 unsigned int offset = 0;
3639
3640 if (bytes == 0) {
3641 char *hdr;
3642 u32 list_length;
3643 u64 max_lba, opt_lba;
3644 u16 same;
3645
3646 /* Swizzle header */
3647 hdr = miter.addr;
3648 list_length = get_unaligned_le32(&hdr[0]);
3649 same = get_unaligned_le16(&hdr[4]);
3650 max_lba = get_unaligned_le64(&hdr[8]);
3651 opt_lba = get_unaligned_le64(&hdr[16]);
3652 put_unaligned_be32(list_length, &hdr[0]);
3653 hdr[4] = same & 0xf;
3654 put_unaligned_be64(max_lba, &hdr[8]);
3655 put_unaligned_be64(opt_lba, &hdr[16]);
3656 offset += 64;
3657 bytes += 64;
3658 }
3659 while (offset < miter.length) {
3660 char *rec;
3661 u8 cond, type, non_seq, reset;
3662 u64 size, start, wp;
3663
3664 /* Swizzle zone descriptor */
3665 rec = miter.addr + offset;
3666 type = rec[0] & 0xf;
3667 cond = (rec[1] >> 4) & 0xf;
3668 non_seq = (rec[1] & 2);
3669 reset = (rec[1] & 1);
3670 size = get_unaligned_le64(&rec[8]);
3671 start = get_unaligned_le64(&rec[16]);
3672 wp = get_unaligned_le64(&rec[24]);
3673 rec[0] = type;
3674 rec[1] = (cond << 4) | non_seq | reset;
3675 put_unaligned_be64(size, &rec[8]);
3676 put_unaligned_be64(start, &rec[16]);
3677 put_unaligned_be64(wp, &rec[24]);
3678 WARN_ON(offset + 64 > miter.length);
3679 offset += 64;
3680 bytes += 64;
3681 }
3682 }
3683 sg_miter_stop(&miter);
3684 local_irq_restore(flags);
3685
3686 ata_scsi_qc_complete(qc);
3687}
3688
3689static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3690{
3691 struct ata_taskfile *tf = &qc->tf;
3692 struct scsi_cmnd *scmd = qc->scsicmd;
3693 const u8 *cdb = scmd->cmnd;
3694 u16 sect, fp = (u16)-1;
3695 u8 sa, options, bp = 0xff;
3696 u64 block;
3697 u32 n_block;
3698
3699 if (unlikely(scmd->cmd_len < 16)) {
3700 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3701 scmd->cmd_len);
3702 fp = 15;
3703 goto invalid_fld;
3704 }
3705 scsi_16_lba_len(cdb, &block, &n_block);
3706 if (n_block != scsi_bufflen(scmd)) {
3707 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3708 n_block, scsi_bufflen(scmd));
3709 goto invalid_param_len;
3710 }
3711 sa = cdb[1] & 0x1f;
3712 if (sa != ZI_REPORT_ZONES) {
3713 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3714 fp = 1;
3715 goto invalid_fld;
3716 }
3717 /*
3718 * ZAC allows only for transfers in 512 byte blocks,
3719 * and uses a 16 bit value for the transfer count.
3720 */
3721 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3722 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3723 goto invalid_param_len;
3724 }
3725 sect = n_block / 512;
3726 options = cdb[14] & 0xbf;
3727
3728 if (ata_ncq_enabled(qc->dev) &&
3729 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3730 tf->protocol = ATA_PROT_NCQ;
3731 tf->command = ATA_CMD_FPDMA_RECV;
3732 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3733 tf->nsect = qc->hw_tag << 3;
3734 tf->feature = sect & 0xff;
3735 tf->hob_feature = (sect >> 8) & 0xff;
3736 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3737 } else {
3738 tf->command = ATA_CMD_ZAC_MGMT_IN;
3739 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3740 tf->protocol = ATA_PROT_DMA;
3741 tf->hob_feature = options;
3742 tf->hob_nsect = (sect >> 8) & 0xff;
3743 tf->nsect = sect & 0xff;
3744 }
3745 tf->device = ATA_LBA;
3746 tf->lbah = (block >> 16) & 0xff;
3747 tf->lbam = (block >> 8) & 0xff;
3748 tf->lbal = block & 0xff;
3749 tf->hob_lbah = (block >> 40) & 0xff;
3750 tf->hob_lbam = (block >> 32) & 0xff;
3751 tf->hob_lbal = (block >> 24) & 0xff;
3752
3753 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3754 qc->flags |= ATA_QCFLAG_RESULT_TF;
3755
3756 ata_qc_set_pc_nbytes(qc);
3757
3758 qc->complete_fn = ata_scsi_report_zones_complete;
3759
3760 return 0;
3761
3762invalid_fld:
3763 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3764 return 1;
3765
3766invalid_param_len:
3767 /* "Parameter list length error" */
3768 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3769 return 1;
3770}
3771
3772static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3773{
3774 struct ata_taskfile *tf = &qc->tf;
3775 struct scsi_cmnd *scmd = qc->scsicmd;
3776 struct ata_device *dev = qc->dev;
3777 const u8 *cdb = scmd->cmnd;
3778 u8 all, sa;
3779 u64 block;
3780 u32 n_block;
3781 u16 fp = (u16)-1;
3782
3783 if (unlikely(scmd->cmd_len < 16)) {
3784 fp = 15;
3785 goto invalid_fld;
3786 }
3787
3788 sa = cdb[1] & 0x1f;
3789 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3790 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3791 fp = 1;
3792 goto invalid_fld;
3793 }
3794
3795 scsi_16_lba_len(cdb, &block, &n_block);
3796 if (n_block) {
3797 /*
3798 * ZAC MANAGEMENT OUT doesn't define any length
3799 */
3800 goto invalid_param_len;
3801 }
3802
3803 all = cdb[14] & 0x1;
3804 if (all) {
3805 /*
3806 * Ignore the block address (zone ID) as defined by ZBC.
3807 */
3808 block = 0;
3809 } else if (block >= dev->n_sectors) {
3810 /*
3811 * Block must be a valid zone ID (a zone start LBA).
3812 */
3813 fp = 2;
3814 goto invalid_fld;
3815 }
3816
3817 if (ata_ncq_enabled(qc->dev) &&
3818 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3819 tf->protocol = ATA_PROT_NCQ_NODATA;
3820 tf->command = ATA_CMD_NCQ_NON_DATA;
3821 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3822 tf->nsect = qc->hw_tag << 3;
3823 tf->auxiliary = sa | ((u16)all << 8);
3824 } else {
3825 tf->protocol = ATA_PROT_NODATA;
3826 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3827 tf->feature = sa;
3828 tf->hob_feature = all;
3829 }
3830 tf->lbah = (block >> 16) & 0xff;
3831 tf->lbam = (block >> 8) & 0xff;
3832 tf->lbal = block & 0xff;
3833 tf->hob_lbah = (block >> 40) & 0xff;
3834 tf->hob_lbam = (block >> 32) & 0xff;
3835 tf->hob_lbal = (block >> 24) & 0xff;
3836 tf->device = ATA_LBA;
3837 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3838
3839 return 0;
3840
3841 invalid_fld:
3842 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3843 return 1;
3844invalid_param_len:
3845 /* "Parameter list length error" */
3846 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3847 return 1;
3848}
3849
3850/**
3851 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3852 * @qc: Storage for translated ATA taskfile
3853 * @buf: input buffer
3854 * @len: number of valid bytes in the input buffer
3855 * @fp: out parameter for the failed field on error
3856 *
3857 * Prepare a taskfile to modify caching information for the device.
3858 *
3859 * LOCKING:
3860 * None.
3861 */
3862static int ata_mselect_caching(struct ata_queued_cmd *qc,
3863 const u8 *buf, int len, u16 *fp)
3864{
3865 struct ata_taskfile *tf = &qc->tf;
3866 struct ata_device *dev = qc->dev;
3867 u8 mpage[CACHE_MPAGE_LEN];
3868 u8 wce;
3869 int i;
3870
3871 /*
3872 * The first two bytes of def_cache_mpage are a header, so offsets
3873 * in mpage are off by 2 compared to buf. Same for len.
3874 */
3875
3876 if (len != CACHE_MPAGE_LEN - 2) {
3877 if (len < CACHE_MPAGE_LEN - 2)
3878 *fp = len;
3879 else
3880 *fp = CACHE_MPAGE_LEN - 2;
3881 return -EINVAL;
3882 }
3883
3884 wce = buf[0] & (1 << 2);
3885
3886 /*
3887 * Check that read-only bits are not modified.
3888 */
3889 ata_msense_caching(dev->id, mpage, false);
3890 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3891 if (i == 0)
3892 continue;
3893 if (mpage[i + 2] != buf[i]) {
3894 *fp = i;
3895 return -EINVAL;
3896 }
3897 }
3898
3899 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3900 tf->protocol = ATA_PROT_NODATA;
3901 tf->nsect = 0;
3902 tf->command = ATA_CMD_SET_FEATURES;
3903 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3904 return 0;
3905}
3906
3907/**
3908 * ata_mselect_control - Simulate MODE SELECT for control page
3909 * @qc: Storage for translated ATA taskfile
3910 * @buf: input buffer
3911 * @len: number of valid bytes in the input buffer
3912 * @fp: out parameter for the failed field on error
3913 *
3914 * Prepare a taskfile to modify caching information for the device.
3915 *
3916 * LOCKING:
3917 * None.
3918 */
3919static int ata_mselect_control(struct ata_queued_cmd *qc,
3920 const u8 *buf, int len, u16 *fp)
3921{
3922 struct ata_device *dev = qc->dev;
3923 u8 mpage[CONTROL_MPAGE_LEN];
3924 u8 d_sense;
3925 int i;
3926
3927 /*
3928 * The first two bytes of def_control_mpage are a header, so offsets
3929 * in mpage are off by 2 compared to buf. Same for len.
3930 */
3931
3932 if (len != CONTROL_MPAGE_LEN - 2) {
3933 if (len < CONTROL_MPAGE_LEN - 2)
3934 *fp = len;
3935 else
3936 *fp = CONTROL_MPAGE_LEN - 2;
3937 return -EINVAL;
3938 }
3939
3940 d_sense = buf[0] & (1 << 2);
3941
3942 /*
3943 * Check that read-only bits are not modified.
3944 */
3945 ata_msense_control(dev, mpage, false);
3946 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3947 if (i == 0)
3948 continue;
3949 if (mpage[2 + i] != buf[i]) {
3950 *fp = i;
3951 return -EINVAL;
3952 }
3953 }
3954 if (d_sense & (1 << 2))
3955 dev->flags |= ATA_DFLAG_D_SENSE;
3956 else
3957 dev->flags &= ~ATA_DFLAG_D_SENSE;
3958 return 0;
3959}
3960
3961/**
3962 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3963 * @qc: Storage for translated ATA taskfile
3964 *
3965 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3966 * Assume this is invoked for direct access devices (e.g. disks) only.
3967 * There should be no block descriptor for other device types.
3968 *
3969 * LOCKING:
3970 * spin_lock_irqsave(host lock)
3971 */
3972static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3973{
3974 struct scsi_cmnd *scmd = qc->scsicmd;
3975 const u8 *cdb = scmd->cmnd;
3976 const u8 *p;
3977 u8 pg, spg;
3978 unsigned six_byte, pg_len, hdr_len, bd_len;
3979 int len;
3980 u16 fp = (u16)-1;
3981 u8 bp = 0xff;
3982
3983 VPRINTK("ENTER\n");
3984
3985 six_byte = (cdb[0] == MODE_SELECT);
3986 if (six_byte) {
3987 if (scmd->cmd_len < 5) {
3988 fp = 4;
3989 goto invalid_fld;
3990 }
3991
3992 len = cdb[4];
3993 hdr_len = 4;
3994 } else {
3995 if (scmd->cmd_len < 9) {
3996 fp = 8;
3997 goto invalid_fld;
3998 }
3999
4000 len = (cdb[7] << 8) + cdb[8];
4001 hdr_len = 8;
4002 }
4003
4004 /* We only support PF=1, SP=0. */
4005 if ((cdb[1] & 0x11) != 0x10) {
4006 fp = 1;
4007 bp = (cdb[1] & 0x01) ? 1 : 5;
4008 goto invalid_fld;
4009 }
4010
4011 /* Test early for possible overrun. */
4012 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4013 goto invalid_param_len;
4014
4015 p = page_address(sg_page(scsi_sglist(scmd)));
4016
4017 /* Move past header and block descriptors. */
4018 if (len < hdr_len)
4019 goto invalid_param_len;
4020
4021 if (six_byte)
4022 bd_len = p[3];
4023 else
4024 bd_len = (p[6] << 8) + p[7];
4025
4026 len -= hdr_len;
4027 p += hdr_len;
4028 if (len < bd_len)
4029 goto invalid_param_len;
4030 if (bd_len != 0 && bd_len != 8) {
4031 fp = (six_byte) ? 3 : 6;
4032 fp += bd_len + hdr_len;
4033 goto invalid_param;
4034 }
4035
4036 len -= bd_len;
4037 p += bd_len;
4038 if (len == 0)
4039 goto skip;
4040
4041 /* Parse both possible formats for the mode page headers. */
4042 pg = p[0] & 0x3f;
4043 if (p[0] & 0x40) {
4044 if (len < 4)
4045 goto invalid_param_len;
4046
4047 spg = p[1];
4048 pg_len = (p[2] << 8) | p[3];
4049 p += 4;
4050 len -= 4;
4051 } else {
4052 if (len < 2)
4053 goto invalid_param_len;
4054
4055 spg = 0;
4056 pg_len = p[1];
4057 p += 2;
4058 len -= 2;
4059 }
4060
4061 /*
4062 * No mode subpages supported (yet) but asking for _all_
4063 * subpages may be valid
4064 */
4065 if (spg && (spg != ALL_SUB_MPAGES)) {
4066 fp = (p[0] & 0x40) ? 1 : 0;
4067 fp += hdr_len +