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mmc: core: Export mmc_get_ext_csd()
[deliverable/linux.git] / drivers / mmc / card / block.c
CommitLineData
1da177e4
LT		 1/*
2 * Block driver for media (i.e., flash cards)
3 *
4 * Copyright 2002 Hewlett-Packard Company
979ce720 5 * Copyright 2005-2008 Pierre Ossman
1da177e4
LT		 6 *
7 * Use consistent with the GNU GPL is permitted,
8 * provided that this copyright notice is
9 * preserved in its entirety in all copies and derived works.
10 *
11 * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
12 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
13 * FITNESS FOR ANY PARTICULAR PURPOSE.
14 *
15 * Many thanks to Alessandro Rubini and Jonathan Corbet!
16 *
17 * Author: Andrew Christian
18 * 28 May 2002
19 */
20#include <linux/moduleparam.h>
21#include <linux/module.h>
22#include <linux/init.h>
23
1da177e4
LT		 24#include <linux/kernel.h>
25#include <linux/fs.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/errno.h>
28#include <linux/hdreg.h>
29#include <linux/kdev_t.h>
30#include <linux/blkdev.h>
a621aaed 31#include <linux/mutex.h>
ec5a19dd 32#include <linux/scatterlist.h>
a7bbb573 33#include <linux/string_helpers.h>
cb87ea28
JC		 34#include <linux/delay.h>
35#include <linux/capability.h>
36#include <linux/compat.h>
e94cfef6 37#include <linux/pm_runtime.h>
1da177e4 38
cb87ea28 39#include <linux/mmc/ioctl.h>
1da177e4 40#include <linux/mmc/card.h>
385e3227 41#include <linux/mmc/host.h>
da7fbe58
PO		 42#include <linux/mmc/mmc.h>
43#include <linux/mmc/sd.h>
1da177e4 44
1da177e4
LT		 45#include <asm/uaccess.h>
46
98ac2162 47#include "queue.h"
1da177e4 48
6b0b6285 49MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 50#ifdef MODULE_PARAM_PREFIX
51#undef MODULE_PARAM_PREFIX
52#endif
53#define MODULE_PARAM_PREFIX "mmcblk."
54
6a7a6b45
AW		 55#define INAND_CMD38_ARG_EXT_CSD 113
56#define INAND_CMD38_ARG_ERASE 0x00
57#define INAND_CMD38_ARG_TRIM 0x01
58#define INAND_CMD38_ARG_SECERASE 0x80
59#define INAND_CMD38_ARG_SECTRIM1 0x81
60#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 61#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 62#define MMC_SANITIZE_REQ_TIMEOUT 240000
63#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 64
ce39f9d1
SJ		 65#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
66 (req->cmd_flags & REQ_META)) && \
67 (rq_data_dir(req) == WRITE))
68#define PACKED_CMD_VER 0x01
69#define PACKED_CMD_WR 0x02
70
5e71b7a6 71static DEFINE_MUTEX(block_mutex);
6b0b6285 72
1da177e4 73/*
5e71b7a6
OJ		 74 * The defaults come from config options but can be overriden by module
75 * or bootarg options.
1da177e4 76 */
5e71b7a6 77static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
1dff3144 78
5e71b7a6
OJ		 79/*
80 * We've only got one major, so number of mmcblk devices is
81 * limited to 256 / number of minors per device.
82 */
83static int max_devices;
84
85/* 256 minors, so at most 256 separate devices */
86static DECLARE_BITMAP(dev_use, 256);
f06c9153 87static DECLARE_BITMAP(name_use, 256);
1da177e4 88
1da177e4
LT		 89/*
90 * There is one mmc_blk_data per slot.
91 */
92struct mmc_blk_data {
93 spinlock_t lock;
94 struct gendisk *disk;
95 struct mmc_queue queue;
371a689f 96 struct list_head part;
1da177e4 97
d0c97cfb
AW		 98 unsigned int flags;
99#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
100#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 101#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 102
1da177e4 103 unsigned int usage;
a6f6c96b 104 unsigned int read_only;
371a689f 105 unsigned int part_type;
f06c9153 106 unsigned int name_idx;
67716327
AH		 107 unsigned int reset_done;
108#define MMC_BLK_READ BIT(0)
109#define MMC_BLK_WRITE BIT(1)
110#define MMC_BLK_DISCARD BIT(2)
111#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 112
113 /*
114 * Only set in main mmc_blk_data associated
fc95e30b 115 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 116 * track of the current selected device partition.
117 */
118 unsigned int part_curr;
119 struct device_attribute force_ro;
add710ea
JR		 120 struct device_attribute power_ro_lock;
121 int area_type;
1da177e4
LT		 122};
123
a621aaed 124static DEFINE_MUTEX(open_lock);
1da177e4 125
ce39f9d1
SJ		 126enum {
127 MMC_PACKED_NR_IDX = -1,
128 MMC_PACKED_NR_ZERO,
129 MMC_PACKED_NR_SINGLE,
130};
131
5e71b7a6
OJ		 132module_param(perdev_minors, int, 0444);
133MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
134
8d1e977d
LP		 135static inline int mmc_blk_part_switch(struct mmc_card *card,
136 struct mmc_blk_data *md);
137static int get_card_status(struct mmc_card *card, u32 *status, int retries);
138
ce39f9d1
SJ		 139static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
140{
141 struct mmc_packed *packed = mqrq->packed;
142
143 BUG_ON(!packed);
144
145 mqrq->cmd_type = MMC_PACKED_NONE;
146 packed->nr_entries = MMC_PACKED_NR_ZERO;
147 packed->idx_failure = MMC_PACKED_NR_IDX;
148 packed->retries = 0;
149 packed->blocks = 0;
150}
151
1da177e4
LT		 152static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
153{
154 struct mmc_blk_data *md;
155
a621aaed 156 mutex_lock(&open_lock);
1da177e4
LT		 157 md = disk->private_data;
158 if (md && md->usage == 0)
159 md = NULL;
160 if (md)
161 md->usage++;
a621aaed 162 mutex_unlock(&open_lock);
1da177e4
LT		 163
164 return md;
165}
166
371a689f
AW		 167static inline int mmc_get_devidx(struct gendisk *disk)
168{
169 int devmaj = MAJOR(disk_devt(disk));
170 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
171
172 if (!devmaj)
173 devidx = disk->first_minor / perdev_minors;
174 return devidx;
175}
176
1da177e4
LT		 177static void mmc_blk_put(struct mmc_blk_data *md)
178{
a621aaed 179 mutex_lock(&open_lock);
1da177e4
LT		 180 md->usage--;
181 if (md->usage == 0) {
371a689f 182 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 183 blk_cleanup_queue(md->queue.queue);
184
1dff3144
DW		 185 __clear_bit(devidx, dev_use);
186
1da177e4 187 put_disk(md->disk);
1da177e4
LT		 188 kfree(md);
189 }
a621aaed 190 mutex_unlock(&open_lock);
1da177e4
LT		 191}
192
add710ea
JR		 193static ssize_t power_ro_lock_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
195{
196 int ret;
197 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
198 struct mmc_card *card = md->queue.card;
199 int locked = 0;
200
201 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
202 locked = 2;
203 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
204 locked = 1;
205
206 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
207
208 return ret;
209}
210
211static ssize_t power_ro_lock_store(struct device *dev,
212 struct device_attribute *attr, const char *buf, size_t count)
213{
214 int ret;
215 struct mmc_blk_data *md, *part_md;
216 struct mmc_card *card;
217 unsigned long set;
218
219 if (kstrtoul(buf, 0, &set))
220 return -EINVAL;
221
222 if (set != 1)
223 return count;
224
225 md = mmc_blk_get(dev_to_disk(dev));
226 card = md->queue.card;
227
e94cfef6 228 mmc_get_card(card);
add710ea
JR		 229
230 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
231 card->ext_csd.boot_ro_lock |
232 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
233 card->ext_csd.part_time);
234 if (ret)
235 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
236 else
237 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
238
e94cfef6 239 mmc_put_card(card);
add710ea
JR		 240
241 if (!ret) {
242 pr_info("%s: Locking boot partition ro until next power on\n",
243 md->disk->disk_name);
244 set_disk_ro(md->disk, 1);
245
246 list_for_each_entry(part_md, &md->part, part)
247 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
248 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
249 set_disk_ro(part_md->disk, 1);
250 }
251 }
252
253 mmc_blk_put(md);
254 return count;
255}
256
371a689f
AW		 257static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
258 char *buf)
259{
260 int ret;
261 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
262
0031a98a 263 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 264 get_disk_ro(dev_to_disk(dev)) ^
265 md->read_only);
266 mmc_blk_put(md);
267 return ret;
268}
269
270static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
271 const char *buf, size_t count)
272{
273 int ret;
274 char *end;
275 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
276 unsigned long set = simple_strtoul(buf, &end, 0);
277 if (end == buf) {
278 ret = -EINVAL;
279 goto out;
280 }
281
282 set_disk_ro(dev_to_disk(dev), set || md->read_only);
283 ret = count;
284out:
285 mmc_blk_put(md);
286 return ret;
287}
288
a5a1561f 289static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 290{
a5a1561f 291 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 292 int ret = -ENXIO;
293
2a48fc0a 294 mutex_lock(&block_mutex);
1da177e4
LT		 295 if (md) {
296 if (md->usage == 2)
a5a1561f 297 check_disk_change(bdev);
1da177e4 298 ret = 0;
a00fc090 299
a5a1561f 300 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 301 mmc_blk_put(md);
a00fc090 302 ret = -EROFS;
70bb0896 303 }
1da177e4 304 }
2a48fc0a 305 mutex_unlock(&block_mutex);
1da177e4
LT		 306
307 return ret;
308}
309
db2a144b 310static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 311{
a5a1561f 312 struct mmc_blk_data *md = disk->private_data;
1da177e4 313
2a48fc0a 314 mutex_lock(&block_mutex);
1da177e4 315 mmc_blk_put(md);
2a48fc0a 316 mutex_unlock(&block_mutex);
1da177e4
LT		 317}
318
319static int
a885c8c4 320mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 321{
a885c8c4
CH		 322 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
323 geo->heads = 4;
324 geo->sectors = 16;
325 return 0;
1da177e4
LT		 326}
327
cb87ea28
JC		 328struct mmc_blk_ioc_data {
329 struct mmc_ioc_cmd ic;
330 unsigned char *buf;
331 u64 buf_bytes;
332};
333
334static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
335 struct mmc_ioc_cmd __user *user)
336{
337 struct mmc_blk_ioc_data *idata;
338 int err;
339
340 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
341 if (!idata) {
342 err = -ENOMEM;
aea253ec 343 goto out;
cb87ea28
JC		 344 }
345
346 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
347 err = -EFAULT;
aea253ec 348 goto idata_err;
cb87ea28
JC		 349 }
350
351 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
352 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
353 err = -EOVERFLOW;
aea253ec 354 goto idata_err;
cb87ea28
JC		 355 }
356
4d6144de
JR		 357 if (!idata->buf_bytes)
358 return idata;
359
cb87ea28
JC		 360 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
361 if (!idata->buf) {
362 err = -ENOMEM;
aea253ec 363 goto idata_err;
cb87ea28
JC		 364 }
365
366 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
367 idata->ic.data_ptr, idata->buf_bytes)) {
368 err = -EFAULT;
369 goto copy_err;
370 }
371
372 return idata;
373
374copy_err:
375 kfree(idata->buf);
aea253ec 376idata_err:
cb87ea28 377 kfree(idata);
aea253ec 378out:
cb87ea28 379 return ERR_PTR(err);
cb87ea28
JC		 380}
381
8d1e977d
LP		 382static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
383 u32 retries_max)
384{
385 int err;
386 u32 retry_count = 0;
387
388 if (!status || !retries_max)
389 return -EINVAL;
390
391 do {
392 err = get_card_status(card, status, 5);
393 if (err)
394 break;
395
396 if (!R1_STATUS(*status) &&
397 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
398 break; /* RPMB programming operation complete */
399
400 /*
401 * Rechedule to give the MMC device a chance to continue
402 * processing the previous command without being polled too
403 * frequently.
404 */
405 usleep_range(1000, 5000);
406 } while (++retry_count < retries_max);
407
408 if (retry_count == retries_max)
409 err = -EPERM;
410
411 return err;
412}
413
775a9362
ME		 414static int ioctl_do_sanitize(struct mmc_card *card)
415{
416 int err;
417
a2d1086d 418 if (!mmc_can_sanitize(card)) {
775a9362
ME		 419 pr_warn("%s: %s - SANITIZE is not supported\n",
420 mmc_hostname(card->host), __func__);
421 err = -EOPNOTSUPP;
422 goto out;
423 }
424
425 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
426 mmc_hostname(card->host), __func__);
427
428 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
429 EXT_CSD_SANITIZE_START, 1,
430 MMC_SANITIZE_REQ_TIMEOUT);
431
432 if (err)
433 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
434 mmc_hostname(card->host), __func__, err);
435
436 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
437 __func__);
438out:
439 return err;
440}
441
cb87ea28
JC		 442static int mmc_blk_ioctl_cmd(struct block_device *bdev,
443 struct mmc_ioc_cmd __user *ic_ptr)
444{
445 struct mmc_blk_ioc_data *idata;
446 struct mmc_blk_data *md;
447 struct mmc_card *card;
448 struct mmc_command cmd = {0};
449 struct mmc_data data = {0};
ad5fd972 450 struct mmc_request mrq = {NULL};
cb87ea28
JC		 451 struct scatterlist sg;
452 int err;
8d1e977d
LP		 453 int is_rpmb = false;
454 u32 status = 0;
cb87ea28
JC		 455
456 /*
457 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
458 * whole block device, not on a partition. This prevents overspray
459 * between sibling partitions.
460 */
461 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
462 return -EPERM;
463
464 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
465 if (IS_ERR(idata))
466 return PTR_ERR(idata);
467
cb87ea28
JC		 468 md = mmc_blk_get(bdev->bd_disk);
469 if (!md) {
470 err = -EINVAL;
1c02f000 471 goto cmd_err;
cb87ea28
JC		 472 }
473
8d1e977d
LP		 474 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
475 is_rpmb = true;
476
cb87ea28
JC		 477 card = md->queue.card;
478 if (IS_ERR(card)) {
479 err = PTR_ERR(card);
480 goto cmd_done;
481 }
482
4d6144de
JR		 483 cmd.opcode = idata->ic.opcode;
484 cmd.arg = idata->ic.arg;
485 cmd.flags = idata->ic.flags;
486
487 if (idata->buf_bytes) {
488 data.sg = &sg;
489 data.sg_len = 1;
490 data.blksz = idata->ic.blksz;
491 data.blocks = idata->ic.blocks;
492
493 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
494
495 if (idata->ic.write_flag)
496 data.flags = MMC_DATA_WRITE;
497 else
498 data.flags = MMC_DATA_READ;
499
500 /* data.flags must already be set before doing this. */
501 mmc_set_data_timeout(&data, card);
502
503 /* Allow overriding the timeout_ns for empirical tuning. */
504 if (idata->ic.data_timeout_ns)
505 data.timeout_ns = idata->ic.data_timeout_ns;
506
507 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
508 /*
509 * Pretend this is a data transfer and rely on the
510 * host driver to compute timeout. When all host
511 * drivers support cmd.cmd_timeout for R1B, this
512 * can be changed to:
513 *
514 * mrq.data = NULL;
515 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
516 */
517 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
518 }
519
520 mrq.data = &data;
521 }
522
523 mrq.cmd = &cmd;
524
e94cfef6 525 mmc_get_card(card);
cb87ea28 526
8d1e977d
LP		 527 err = mmc_blk_part_switch(card, md);
528 if (err)
529 goto cmd_rel_host;
530
cb87ea28
JC		 531 if (idata->ic.is_acmd) {
532 err = mmc_app_cmd(card->host, card);
533 if (err)
534 goto cmd_rel_host;
535 }
536
8d1e977d
LP		 537 if (is_rpmb) {
538 err = mmc_set_blockcount(card, data.blocks,
539 idata->ic.write_flag & (1 << 31));
540 if (err)
541 goto cmd_rel_host;
542 }
543
a82e484e
YG		 544 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
545 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 546 err = ioctl_do_sanitize(card);
547
548 if (err)
549 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
550 __func__, err);
551
552 goto cmd_rel_host;
553 }
554
cb87ea28
JC		 555 mmc_wait_for_req(card->host, &mrq);
556
557 if (cmd.error) {
558 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
559 __func__, cmd.error);
560 err = cmd.error;
561 goto cmd_rel_host;
562 }
563 if (data.error) {
564 dev_err(mmc_dev(card->host), "%s: data error %d\n",
565 __func__, data.error);
566 err = data.error;
567 goto cmd_rel_host;
568 }
569
570 /*
571 * According to the SD specs, some commands require a delay after
572 * issuing the command.
573 */
574 if (idata->ic.postsleep_min_us)
575 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
576
577 if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
578 err = -EFAULT;
579 goto cmd_rel_host;
580 }
581
582 if (!idata->ic.write_flag) {
583 if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
584 idata->buf, idata->buf_bytes)) {
585 err = -EFAULT;
586 goto cmd_rel_host;
587 }
588 }
589
8d1e977d
LP		 590 if (is_rpmb) {
591 /*
592 * Ensure RPMB command has completed by polling CMD13
593 * "Send Status".
594 */
595 err = ioctl_rpmb_card_status_poll(card, &status, 5);
596 if (err)
597 dev_err(mmc_dev(card->host),
598 "%s: Card Status=0x%08X, error %d\n",
599 __func__, status, err);
600 }
601
cb87ea28 602cmd_rel_host:
e94cfef6 603 mmc_put_card(card);
cb87ea28
JC		 604
605cmd_done:
606 mmc_blk_put(md);
1c02f000 607cmd_err:
cb87ea28
JC		 608 kfree(idata->buf);
609 kfree(idata);
610 return err;
611}
612
613static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
614 unsigned int cmd, unsigned long arg)
615{
616 int ret = -EINVAL;
617 if (cmd == MMC_IOC_CMD)
618 ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
619 return ret;
620}
621
622#ifdef CONFIG_COMPAT
623static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
624 unsigned int cmd, unsigned long arg)
625{
626 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
627}
628#endif
629
83d5cde4 630static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 631 .open = mmc_blk_open,
632 .release = mmc_blk_release,
a885c8c4 633 .getgeo = mmc_blk_getgeo,
1da177e4 634 .owner = THIS_MODULE,
cb87ea28
JC		 635 .ioctl = mmc_blk_ioctl,
636#ifdef CONFIG_COMPAT
637 .compat_ioctl = mmc_blk_compat_ioctl,
638#endif
1da177e4
LT		 639};
640
371a689f
AW		 641static inline int mmc_blk_part_switch(struct mmc_card *card,
642 struct mmc_blk_data *md)
643{
644 int ret;
fc95e30b 645 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 646
371a689f
AW		 647 if (main_md->part_curr == md->part_type)
648 return 0;
649
650 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 651 u8 part_config = card->ext_csd.part_config;
652
653 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
654 part_config |= md->part_type;
371a689f
AW		 655
656 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 657 EXT_CSD_PART_CONFIG, part_config,
371a689f
AW		 658 card->ext_csd.part_time);
659 if (ret)
660 return ret;
0d7d85ca
AH		 661
662 card->ext_csd.part_config = part_config;
67716327 663 }
371a689f
AW		 664
665 main_md->part_curr = md->part_type;
666 return 0;
667}
668
ec5a19dd
PO		 669static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
670{
671 int err;
051913da
BD		 672 u32 result;
673 __be32 *blocks;
ec5a19dd 674
ad5fd972 675 struct mmc_request mrq = {NULL};
1278dba1 676 struct mmc_command cmd = {0};
a61ad2b4 677 struct mmc_data data = {0};
ec5a19dd
PO		 678
679 struct scatterlist sg;
680
ec5a19dd
PO		 681 cmd.opcode = MMC_APP_CMD;
682 cmd.arg = card->rca << 16;
7213d175 683 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 684
685 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 686 if (err)
687 return (u32)-1;
688 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 689 return (u32)-1;
690
691 memset(&cmd, 0, sizeof(struct mmc_command));
692
693 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
694 cmd.arg = 0;
7213d175 695 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 696
ec5a19dd
PO		 697 data.blksz = 4;
698 data.blocks = 1;
699 data.flags = MMC_DATA_READ;
700 data.sg = &sg;
701 data.sg_len = 1;
d380443c 702 mmc_set_data_timeout(&data, card);
ec5a19dd 703
ec5a19dd
PO		 704 mrq.cmd = &cmd;
705 mrq.data = &data;
706
051913da
BD		 707 blocks = kmalloc(4, GFP_KERNEL);
708 if (!blocks)
709 return (u32)-1;
710
711 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 712
713 mmc_wait_for_req(card->host, &mrq);
714
051913da
BD		 715 result = ntohl(*blocks);
716 kfree(blocks);
717
17b0429d 718 if (cmd.error || data.error)
051913da 719 result = (u32)-1;
ec5a19dd 720
051913da 721 return result;
ec5a19dd
PO		 722}
723
0a2d4048 724static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 725{
1278dba1 726 struct mmc_command cmd = {0};
504f191f
AH		 727 int err;
728
504f191f
AH		 729 cmd.opcode = MMC_SEND_STATUS;
730 if (!mmc_host_is_spi(card->host))
731 cmd.arg = card->rca << 16;
732 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 733 err = mmc_wait_for_cmd(card->host, &cmd, retries);
734 if (err == 0)
735 *status = cmd.resp[0];
736 return err;
504f191f
AH		 737}
738
c49433fb 739static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 740 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 741{
742 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
743 int err = 0;
744 u32 status;
745
746 do {
747 err = get_card_status(card, &status, 5);
748 if (err) {
749 pr_err("%s: error %d requesting status\n",
750 req->rq_disk->disk_name, err);
751 return err;
752 }
753
754 if (status & R1_ERROR) {
755 pr_err("%s: %s: error sending status cmd, status %#x\n",
756 req->rq_disk->disk_name, __func__, status);
757 *gen_err = 1;
758 }
759
95a91298
UH		 760 /* We may rely on the host hw to handle busy detection.*/
761 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
762 hw_busy_detect)
763 break;
764
c49433fb
UH		 765 /*
766 * Timeout if the device never becomes ready for data and never
767 * leaves the program state.
768 */
769 if (time_after(jiffies, timeout)) {
770 pr_err("%s: Card stuck in programming state! %s %s\n",
771 mmc_hostname(card->host),
772 req->rq_disk->disk_name, __func__);
773 return -ETIMEDOUT;
774 }
775
776 /*
777 * Some cards mishandle the status bits,
778 * so make sure to check both the busy
779 * indication and the card state.
780 */
781 } while (!(status & R1_READY_FOR_DATA) ||
782 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
783
784 return err;
785}
786
bb5cba40
UH		 787static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
788 struct request *req, int *gen_err, u32 *stop_status)
789{
790 struct mmc_host *host = card->host;
791 struct mmc_command cmd = {0};
792 int err;
793 bool use_r1b_resp = rq_data_dir(req) == WRITE;
794
795 /*
796 * Normally we use R1B responses for WRITE, but in cases where the host
797 * has specified a max_busy_timeout we need to validate it. A failure
798 * means we need to prevent the host from doing hw busy detection, which
799 * is done by converting to a R1 response instead.
800 */
801 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
802 use_r1b_resp = false;
803
804 cmd.opcode = MMC_STOP_TRANSMISSION;
805 if (use_r1b_resp) {
806 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
807 cmd.busy_timeout = timeout_ms;
808 } else {
809 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
810 }
811
812 err = mmc_wait_for_cmd(host, &cmd, 5);
813 if (err)
814 return err;
815
816 *stop_status = cmd.resp[0];
817
818 /* No need to check card status in case of READ. */
819 if (rq_data_dir(req) == READ)
820 return 0;
821
822 if (!mmc_host_is_spi(host) &&
823 (*stop_status & R1_ERROR)) {
824 pr_err("%s: %s: general error sending stop command, resp %#x\n",
825 req->rq_disk->disk_name, __func__, *stop_status);
826 *gen_err = 1;
827 }
828
829 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
830}
831
a8ad82cc 832#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 833#define ERR_RETRY 2
834#define ERR_ABORT 1
835#define ERR_CONTINUE 0
836
837static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
838 bool status_valid, u32 status)
839{
840 switch (error) {
841 case -EILSEQ:
842 /* response crc error, retry the r/w cmd */
843 pr_err("%s: %s sending %s command, card status %#x\n",
844 req->rq_disk->disk_name, "response CRC error",
845 name, status);
846 return ERR_RETRY;
847
848 case -ETIMEDOUT:
849 pr_err("%s: %s sending %s command, card status %#x\n",
850 req->rq_disk->disk_name, "timed out", name, status);
851
852 /* If the status cmd initially failed, retry the r/w cmd */
853 if (!status_valid)
854 return ERR_RETRY;
855
856 /*
857 * If it was a r/w cmd crc error, or illegal command
858 * (eg, issued in wrong state) then retry - we should
859 * have corrected the state problem above.
860 */
861 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
862 return ERR_RETRY;
863
864 /* Otherwise abort the command */
865 return ERR_ABORT;
866
867 default:
868 /* We don't understand the error code the driver gave us */
869 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
870 req->rq_disk->disk_name, error, status);
871 return ERR_ABORT;
872 }
873}
874
875/*
876 * Initial r/w and stop cmd error recovery.
877 * We don't know whether the card received the r/w cmd or not, so try to
878 * restore things back to a sane state. Essentially, we do this as follows:
879 * - Obtain card status. If the first attempt to obtain card status fails,
880 * the status word will reflect the failed status cmd, not the failed
881 * r/w cmd. If we fail to obtain card status, it suggests we can no
882 * longer communicate with the card.
883 * - Check the card state. If the card received the cmd but there was a
884 * transient problem with the response, it might still be in a data transfer
885 * mode. Try to send it a stop command. If this fails, we can't recover.
886 * - If the r/w cmd failed due to a response CRC error, it was probably
887 * transient, so retry the cmd.
888 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
889 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
890 * illegal cmd, retry.
891 * Otherwise we don't understand what happened, so abort.
892 */
893static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 894 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 895{
896 bool prev_cmd_status_valid = true;
897 u32 status, stop_status = 0;
898 int err, retry;
899
a8ad82cc
SRT		 900 if (mmc_card_removed(card))
901 return ERR_NOMEDIUM;
902
a01f3ccf
RKAL		 903 /*
904 * Try to get card status which indicates both the card state
905 * and why there was no response. If the first attempt fails,
906 * we can't be sure the returned status is for the r/w command.
907 */
908 for (retry = 2; retry >= 0; retry--) {
909 err = get_card_status(card, &status, 0);
910 if (!err)
911 break;
912
913 prev_cmd_status_valid = false;
914 pr_err("%s: error %d sending status command, %sing\n",
915 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
916 }
917
918 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 919 if (err) {
920 /* Check if the card is removed */
921 if (mmc_detect_card_removed(card->host))
922 return ERR_NOMEDIUM;
a01f3ccf 923 return ERR_ABORT;
a8ad82cc 924 }
a01f3ccf 925
67716327
AH		 926 /* Flag ECC errors */
927 if ((status & R1_CARD_ECC_FAILED) ||
928 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
929 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
930 *ecc_err = 1;
931
c8760069
KY		 932 /* Flag General errors */
933 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
934 if ((status & R1_ERROR) ||
935 (brq->stop.resp[0] & R1_ERROR)) {
936 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
937 req->rq_disk->disk_name, __func__,
938 brq->stop.resp[0], status);
939 *gen_err = 1;
940 }
941
a01f3ccf
RKAL		 942 /*
943 * Check the current card state. If it is in some data transfer
944 * mode, tell it to stop (and hopefully transition back to TRAN.)
945 */
946 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
947 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 948 err = send_stop(card,
949 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
950 req, gen_err, &stop_status);
951 if (err) {
a01f3ccf
RKAL		 952 pr_err("%s: error %d sending stop command\n",
953 req->rq_disk->disk_name, err);
bb5cba40
UH		 954 /*
955 * If the stop cmd also timed out, the card is probably
956 * not present, so abort. Other errors are bad news too.
957 */
a01f3ccf 958 return ERR_ABORT;
bb5cba40
UH		 959 }
960
67716327
AH		 961 if (stop_status & R1_CARD_ECC_FAILED)
962 *ecc_err = 1;
a01f3ccf
RKAL		 963 }
964
965 /* Check for set block count errors */
966 if (brq->sbc.error)
967 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
968 prev_cmd_status_valid, status);
969
970 /* Check for r/w command errors */
971 if (brq->cmd.error)
972 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
973 prev_cmd_status_valid, status);
974
67716327
AH		 975 /* Data errors */
976 if (!brq->stop.error)
977 return ERR_CONTINUE;
978
a01f3ccf 979 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 980 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 981 req->rq_disk->disk_name, brq->stop.error,
982 brq->cmd.resp[0], status);
983
984 /*
985 * Subsitute in our own stop status as this will give the error
986 * state which happened during the execution of the r/w command.
987 */
988 if (stop_status) {
989 brq->stop.resp[0] = stop_status;
990 brq->stop.error = 0;
991 }
992 return ERR_CONTINUE;
993}
994
67716327
AH		 995static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
996 int type)
997{
998 int err;
999
1000 if (md->reset_done & type)
1001 return -EEXIST;
1002
1003 md->reset_done |= type;
1004 err = mmc_hw_reset(host);
1005 /* Ensure we switch back to the correct partition */
1006 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1007 struct mmc_blk_data *main_md =
1008 dev_get_drvdata(&host->card->dev);
67716327
AH		 1009 int part_err;
1010
1011 main_md->part_curr = main_md->part_type;
1012 part_err = mmc_blk_part_switch(host->card, md);
1013 if (part_err) {
1014 /*
1015 * We have failed to get back into the correct
1016 * partition, so we need to abort the whole request.
1017 */
1018 return -ENODEV;
1019 }
1020 }
1021 return err;
1022}
1023
1024static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1025{
1026 md->reset_done &= ~type;
1027}
1028
bd788c96
AH		 1029static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1030{
1031 struct mmc_blk_data *md = mq->data;
1032 struct mmc_card *card = md->queue.card;
1033 unsigned int from, nr, arg;
67716327 1034 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1035
bd788c96
AH		 1036 if (!mmc_can_erase(card)) {
1037 err = -EOPNOTSUPP;
1038 goto out;
1039 }
1040
1041 from = blk_rq_pos(req);
1042 nr = blk_rq_sectors(req);
1043
b3bf9153
KP		 1044 if (mmc_can_discard(card))
1045 arg = MMC_DISCARD_ARG;
1046 else if (mmc_can_trim(card))
bd788c96
AH		 1047 arg = MMC_TRIM_ARG;
1048 else
1049 arg = MMC_ERASE_ARG;
67716327 1050retry:
6a7a6b45
AW		 1051 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1052 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1053 INAND_CMD38_ARG_EXT_CSD,
1054 arg == MMC_TRIM_ARG ?
1055 INAND_CMD38_ARG_TRIM :
1056 INAND_CMD38_ARG_ERASE,
1057 0);
1058 if (err)
1059 goto out;
1060 }
bd788c96
AH		 1061 err = mmc_erase(card, from, nr, arg);
1062out:
67716327
AH		 1063 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1064 goto retry;
1065 if (!err)
1066 mmc_blk_reset_success(md, type);
ecf8b5d0 1067 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1068
bd788c96
AH		 1069 return err ? 0 : 1;
1070}
1071
49804548
AH		 1072static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1073 struct request *req)
1074{
1075 struct mmc_blk_data *md = mq->data;
1076 struct mmc_card *card = md->queue.card;
775a9362 1077 unsigned int from, nr, arg;
67716327 1078 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1079
775a9362 1080 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1081 err = -EOPNOTSUPP;
1082 goto out;
1083 }
1084
28302812
AH		 1085 from = blk_rq_pos(req);
1086 nr = blk_rq_sectors(req);
1087
775a9362
ME		 1088 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1089 arg = MMC_SECURE_TRIM1_ARG;
1090 else
1091 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1092
67716327 1093retry:
6a7a6b45
AW		 1094 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1095 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1096 INAND_CMD38_ARG_EXT_CSD,
1097 arg == MMC_SECURE_TRIM1_ARG ?
1098 INAND_CMD38_ARG_SECTRIM1 :
1099 INAND_CMD38_ARG_SECERASE,
1100 0);
1101 if (err)
28302812 1102 goto out_retry;
6a7a6b45 1103 }
28302812 1104
49804548 1105 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1106 if (err == -EIO)
1107 goto out_retry;
1108 if (err)
1109 goto out;
1110
1111 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1112 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1113 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1114 INAND_CMD38_ARG_EXT_CSD,
1115 INAND_CMD38_ARG_SECTRIM2,
1116 0);
1117 if (err)
28302812 1118 goto out_retry;
6a7a6b45 1119 }
28302812 1120
49804548 1121 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1122 if (err == -EIO)
1123 goto out_retry;
1124 if (err)
1125 goto out;
6a7a6b45 1126 }
28302812 1127
28302812
AH		 1128out_retry:
1129 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1130 goto retry;
1131 if (!err)
1132 mmc_blk_reset_success(md, type);
28302812 1133out:
ecf8b5d0 1134 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1135
49804548
AH		 1136 return err ? 0 : 1;
1137}
1138
f4c5522b
AW		 1139static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1140{
1141 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1142 struct mmc_card *card = md->queue.card;
1143 int ret = 0;
1144
1145 ret = mmc_flush_cache(card);
1146 if (ret)
1147 ret = -EIO;
f4c5522b 1148
ecf8b5d0 1149 blk_end_request_all(req, ret);
f4c5522b 1150
881d1c25 1151 return ret ? 0 : 1;
f4c5522b
AW		 1152}
1153
1154/*
1155 * Reformat current write as a reliable write, supporting
1156 * both legacy and the enhanced reliable write MMC cards.
1157 * In each transfer we'll handle only as much as a single
1158 * reliable write can handle, thus finish the request in
1159 * partial completions.
1160 */
d0c97cfb
AW		 1161static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1162 struct mmc_card *card,
1163 struct request *req)
f4c5522b 1164{
f4c5522b
AW		 1165 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1166 /* Legacy mode imposes restrictions on transfers. */
1167 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1168 brq->data.blocks = 1;
1169
1170 if (brq->data.blocks > card->ext_csd.rel_sectors)
1171 brq->data.blocks = card->ext_csd.rel_sectors;
1172 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1173 brq->data.blocks = 1;
1174 }
f4c5522b
AW		 1175}
1176
4c2b8f26
RKAL		 1177#define CMD_ERRORS \
1178 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1179 R1_ADDRESS_ERROR | /* Misaligned address */ \
1180 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1181 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1182 R1_CC_ERROR | /* Card controller error */ \
1183 R1_ERROR) /* General/unknown error */
1184
ee8a43a5
PF		 1185static int mmc_blk_err_check(struct mmc_card *card,
1186 struct mmc_async_req *areq)
d78d4a8a 1187{
ee8a43a5
PF		 1188 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1189 mmc_active);
1190 struct mmc_blk_request *brq = &mq_mrq->brq;
1191 struct request *req = mq_mrq->req;
c8760069 1192 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1193
1194 /*
1195 * sbc.error indicates a problem with the set block count
1196 * command. No data will have been transferred.
1197 *
1198 * cmd.error indicates a problem with the r/w command. No
1199 * data will have been transferred.
1200 *
1201 * stop.error indicates a problem with the stop command. Data
1202 * may have been transferred, or may still be transferring.
1203 */
67716327
AH		 1204 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1205 brq->data.error) {
c8760069 1206 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1207 case ERR_RETRY:
1208 return MMC_BLK_RETRY;
1209 case ERR_ABORT:
1210 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1211 case ERR_NOMEDIUM:
1212 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1213 case ERR_CONTINUE:
1214 break;
1215 }
1216 }
1217
1218 /*
1219 * Check for errors relating to the execution of the
1220 * initial command - such as address errors. No data
1221 * has been transferred.
1222 */
1223 if (brq->cmd.resp[0] & CMD_ERRORS) {
1224 pr_err("%s: r/w command failed, status = %#x\n",
1225 req->rq_disk->disk_name, brq->cmd.resp[0]);
1226 return MMC_BLK_ABORT;
1227 }
1228
1229 /*
1230 * Everything else is either success, or a data error of some
1231 * kind. If it was a write, we may have transitioned to
1232 * program mode, which we have to wait for it to complete.
1233 */
1234 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1235 int err;
8fee476b 1236
c8760069
KY		 1237 /* Check stop command response */
1238 if (brq->stop.resp[0] & R1_ERROR) {
1239 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1240 req->rq_disk->disk_name, __func__,
1241 brq->stop.resp[0]);
1242 gen_err = 1;
1243 }
1244
95a91298
UH		 1245 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1246 &gen_err);
c49433fb
UH		 1247 if (err)
1248 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1249 }
1250
c8760069
KY		 1251 /* if general error occurs, retry the write operation. */
1252 if (gen_err) {
1253 pr_warn("%s: retrying write for general error\n",
1254 req->rq_disk->disk_name);
1255 return MMC_BLK_RETRY;
1256 }
1257
d78d4a8a
PF		 1258 if (brq->data.error) {
1259 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1260 req->rq_disk->disk_name, brq->data.error,
1261 (unsigned)blk_rq_pos(req),
1262 (unsigned)blk_rq_sectors(req),
1263 brq->cmd.resp[0], brq->stop.resp[0]);
1264
1265 if (rq_data_dir(req) == READ) {
67716327
AH		 1266 if (ecc_err)
1267 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1268 return MMC_BLK_DATA_ERR;
1269 } else {
1270 return MMC_BLK_CMD_ERR;
1271 }
1272 }
1273
67716327
AH		 1274 if (!brq->data.bytes_xfered)
1275 return MMC_BLK_RETRY;
d78d4a8a 1276
ce39f9d1
SJ		 1277 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1278 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1279 return MMC_BLK_PARTIAL;
1280 else
1281 return MMC_BLK_SUCCESS;
1282 }
1283
67716327
AH		 1284 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1285 return MMC_BLK_PARTIAL;
1286
1287 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1288}
1289
ce39f9d1
SJ		 1290static int mmc_blk_packed_err_check(struct mmc_card *card,
1291 struct mmc_async_req *areq)
1292{
1293 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1294 mmc_active);
1295 struct request *req = mq_rq->req;
1296 struct mmc_packed *packed = mq_rq->packed;
1297 int err, check, status;
1298 u8 *ext_csd;
1299
1300 BUG_ON(!packed);
1301
1302 packed->retries--;
1303 check = mmc_blk_err_check(card, areq);
1304 err = get_card_status(card, &status, 0);
1305 if (err) {
1306 pr_err("%s: error %d sending status command\n",
1307 req->rq_disk->disk_name, err);
1308 return MMC_BLK_ABORT;
1309 }
1310
1311 if (status & R1_EXCEPTION_EVENT) {
1312 ext_csd = kzalloc(512, GFP_KERNEL);
1313 if (!ext_csd) {
1314 pr_err("%s: unable to allocate buffer for ext_csd\n",
1315 req->rq_disk->disk_name);
1316 return -ENOMEM;
1317 }
1318
1319 err = mmc_send_ext_csd(card, ext_csd);
1320 if (err) {
1321 pr_err("%s: error %d sending ext_csd\n",
1322 req->rq_disk->disk_name, err);
1323 check = MMC_BLK_ABORT;
1324 goto free;
1325 }
1326
1327 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1328 EXT_CSD_PACKED_FAILURE) &&
1329 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1330 EXT_CSD_PACKED_GENERIC_ERROR)) {
1331 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1332 EXT_CSD_PACKED_INDEXED_ERROR) {
1333 packed->idx_failure =
1334 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1335 check = MMC_BLK_PARTIAL;
1336 }
1337 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1338 "failure index: %d\n",
1339 req->rq_disk->disk_name, packed->nr_entries,
1340 packed->blocks, packed->idx_failure);
1341 }
1342free:
1343 kfree(ext_csd);
1344 }
1345
1346 return check;
1347}
1348
54d49d77
PF		 1349static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1350 struct mmc_card *card,
1351 int disable_multi,
1352 struct mmc_queue *mq)
1da177e4 1353{
54d49d77
PF		 1354 u32 readcmd, writecmd;
1355 struct mmc_blk_request *brq = &mqrq->brq;
1356 struct request *req = mqrq->req;
1da177e4 1357 struct mmc_blk_data *md = mq->data;
4265900e 1358 bool do_data_tag;
1da177e4 1359
f4c5522b
AW		 1360 /*
1361 * Reliable writes are used to implement Forced Unit Access and
1362 * REQ_META accesses, and are supported only on MMCs.
65299a3b
CH		 1363 *
1364 * XXX: this really needs a good explanation of why REQ_META
1365 * is treated special.
f4c5522b
AW		 1366 */
1367 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1368 (req->cmd_flags & REQ_META)) &&
1369 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1370 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1371
54d49d77
PF		 1372 memset(brq, 0, sizeof(struct mmc_blk_request));
1373 brq->mrq.cmd = &brq->cmd;
1374 brq->mrq.data = &brq->data;
1da177e4 1375
54d49d77
PF		 1376 brq->cmd.arg = blk_rq_pos(req);
1377 if (!mmc_card_blockaddr(card))
1378 brq->cmd.arg <<= 9;
1379 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1380 brq->data.blksz = 512;
1381 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1382 brq->stop.arg = 0;
54d49d77 1383 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1384
54d49d77
PF		 1385 /*
1386 * The block layer doesn't support all sector count
1387 * restrictions, so we need to be prepared for too big
1388 * requests.
1389 */
1390 if (brq->data.blocks > card->host->max_blk_count)
1391 brq->data.blocks = card->host->max_blk_count;
1da177e4 1392
2bf22b39
PW		 1393 if (brq->data.blocks > 1) {
1394 /*
1395 * After a read error, we redo the request one sector
1396 * at a time in order to accurately determine which
1397 * sectors can be read successfully.
1398 */
1399 if (disable_multi)
1400 brq->data.blocks = 1;
1401
2e47e842
KM		 1402 /*
1403 * Some controllers have HW issues while operating
1404 * in multiple I/O mode
1405 */
1406 if (card->host->ops->multi_io_quirk)
1407 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1408 (rq_data_dir(req) == READ) ?
1409 MMC_DATA_READ : MMC_DATA_WRITE,
1410 brq->data.blocks);
2bf22b39 1411 }
d0c97cfb 1412
54d49d77
PF		 1413 if (brq->data.blocks > 1 || do_rel_wr) {
1414 /* SPI multiblock writes terminate using a special
1415 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1416 */
54d49d77
PF		 1417 if (!mmc_host_is_spi(card->host) ||
1418 rq_data_dir(req) == READ)
1419 brq->mrq.stop = &brq->stop;
1420 readcmd = MMC_READ_MULTIPLE_BLOCK;
1421 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1422 } else {
1423 brq->mrq.stop = NULL;
1424 readcmd = MMC_READ_SINGLE_BLOCK;
1425 writecmd = MMC_WRITE_BLOCK;
1426 }
1427 if (rq_data_dir(req) == READ) {
1428 brq->cmd.opcode = readcmd;
1429 brq->data.flags |= MMC_DATA_READ;
bcc3e172
UH		 1430 if (brq->mrq.stop)
1431 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1432 MMC_CMD_AC;
54d49d77
PF		 1433 } else {
1434 brq->cmd.opcode = writecmd;
1435 brq->data.flags |= MMC_DATA_WRITE;
bcc3e172
UH		 1436 if (brq->mrq.stop)
1437 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1438 MMC_CMD_AC;
54d49d77 1439 }
d0c97cfb 1440
54d49d77
PF		 1441 if (do_rel_wr)
1442 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1443
4265900e
SD		 1444 /*
1445 * Data tag is used only during writing meta data to speed
1446 * up write and any subsequent read of this meta data
1447 */
1448 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1449 (req->cmd_flags & REQ_META) &&
1450 (rq_data_dir(req) == WRITE) &&
1451 ((brq->data.blocks * brq->data.blksz) >=
1452 card->ext_csd.data_tag_unit_size);
1453
54d49d77
PF		 1454 /*
1455 * Pre-defined multi-block transfers are preferable to
1456 * open ended-ones (and necessary for reliable writes).
1457 * However, it is not sufficient to just send CMD23,
1458 * and avoid the final CMD12, as on an error condition
1459 * CMD12 (stop) needs to be sent anyway. This, coupled
1460 * with Auto-CMD23 enhancements provided by some
1461 * hosts, means that the complexity of dealing
1462 * with this is best left to the host. If CMD23 is
1463 * supported by card and host, we'll fill sbc in and let
1464 * the host deal with handling it correctly. This means
1465 * that for hosts that don't expose MMC_CAP_CMD23, no
1466 * change of behavior will be observed.
1467 *
1468 * N.B: Some MMC cards experience perf degradation.
1469 * We'll avoid using CMD23-bounded multiblock writes for
1470 * these, while retaining features like reliable writes.
1471 */
4265900e
SD		 1472 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1473 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1474 do_data_tag)) {
54d49d77
PF		 1475 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1476 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1477 (do_rel_wr ? (1 << 31) : 0) |
1478 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1479 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1480 brq->mrq.sbc = &brq->sbc;
1481 }
98ccf149 1482
54d49d77
PF		 1483 mmc_set_data_timeout(&brq->data, card);
1484
1485 brq->data.sg = mqrq->sg;
1486 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1487
1488 /*
1489 * Adjust the sg list so it is the same size as the
1490 * request.
1491 */
1492 if (brq->data.blocks != blk_rq_sectors(req)) {
1493 int i, data_size = brq->data.blocks << 9;
1494 struct scatterlist *sg;
1495
1496 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1497 data_size -= sg->length;
1498 if (data_size <= 0) {
1499 sg->length += data_size;
1500 i++;
1501 break;
6a79e391 1502 }
6a79e391 1503 }
54d49d77
PF		 1504 brq->data.sg_len = i;
1505 }
1506
ee8a43a5
PF		 1507 mqrq->mmc_active.mrq = &brq->mrq;
1508 mqrq->mmc_active.err_check = mmc_blk_err_check;
1509
54d49d77
PF		 1510 mmc_queue_bounce_pre(mqrq);
1511}
6a79e391 1512
ce39f9d1
SJ		 1513static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1514 struct mmc_card *card)
1515{
1516 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1517 unsigned int max_seg_sz = queue_max_segment_size(q);
1518 unsigned int len, nr_segs = 0;
1519
1520 do {
1521 len = min(hdr_sz, max_seg_sz);
1522 hdr_sz -= len;
1523 nr_segs++;
1524 } while (hdr_sz);
1525
1526 return nr_segs;
1527}
1528
1529static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1530{
1531 struct request_queue *q = mq->queue;
1532 struct mmc_card *card = mq->card;
1533 struct request *cur = req, *next = NULL;
1534 struct mmc_blk_data *md = mq->data;
1535 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1536 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1537 unsigned int req_sectors = 0, phys_segments = 0;
1538 unsigned int max_blk_count, max_phys_segs;
1539 bool put_back = true;
1540 u8 max_packed_rw = 0;
1541 u8 reqs = 0;
1542
1543 if (!(md->flags & MMC_BLK_PACKED_CMD))
1544 goto no_packed;
1545
1546 if ((rq_data_dir(cur) == WRITE) &&
1547 mmc_host_packed_wr(card->host))
1548 max_packed_rw = card->ext_csd.max_packed_writes;
1549
1550 if (max_packed_rw == 0)
1551 goto no_packed;
1552
1553 if (mmc_req_rel_wr(cur) &&
1554 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1555 goto no_packed;
1556
1557 if (mmc_large_sector(card) &&
1558 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1559 goto no_packed;
1560
1561 mmc_blk_clear_packed(mqrq);
1562
1563 max_blk_count = min(card->host->max_blk_count,
1564 card->host->max_req_size >> 9);
1565 if (unlikely(max_blk_count > 0xffff))
1566 max_blk_count = 0xffff;
1567
1568 max_phys_segs = queue_max_segments(q);
1569 req_sectors += blk_rq_sectors(cur);
1570 phys_segments += cur->nr_phys_segments;
1571
1572 if (rq_data_dir(cur) == WRITE) {
1573 req_sectors += mmc_large_sector(card) ? 8 : 1;
1574 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1575 }
1576
1577 do {
1578 if (reqs >= max_packed_rw - 1) {
1579 put_back = false;
1580 break;
1581 }
1582
1583 spin_lock_irq(q->queue_lock);
1584 next = blk_fetch_request(q);
1585 spin_unlock_irq(q->queue_lock);
1586 if (!next) {
1587 put_back = false;
1588 break;
1589 }
1590
1591 if (mmc_large_sector(card) &&
1592 !IS_ALIGNED(blk_rq_sectors(next), 8))
1593 break;
1594
1595 if (next->cmd_flags & REQ_DISCARD ||
1596 next->cmd_flags & REQ_FLUSH)
1597 break;
1598
1599 if (rq_data_dir(cur) != rq_data_dir(next))
1600 break;
1601
1602 if (mmc_req_rel_wr(next) &&
1603 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1604 break;
1605
1606 req_sectors += blk_rq_sectors(next);
1607 if (req_sectors > max_blk_count)
1608 break;
1609
1610 phys_segments += next->nr_phys_segments;
1611 if (phys_segments > max_phys_segs)
1612 break;
1613
1614 list_add_tail(&next->queuelist, &mqrq->packed->list);
1615 cur = next;
1616 reqs++;
1617 } while (1);
1618
1619 if (put_back) {
1620 spin_lock_irq(q->queue_lock);
1621 blk_requeue_request(q, next);
1622 spin_unlock_irq(q->queue_lock);
1623 }
1624
1625 if (reqs > 0) {
1626 list_add(&req->queuelist, &mqrq->packed->list);
1627 mqrq->packed->nr_entries = ++reqs;
1628 mqrq->packed->retries = reqs;
1629 return reqs;
1630 }
1631
1632no_packed:
1633 mqrq->cmd_type = MMC_PACKED_NONE;
1634 return 0;
1635}
1636
1637static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1638 struct mmc_card *card,
1639 struct mmc_queue *mq)
1640{
1641 struct mmc_blk_request *brq = &mqrq->brq;
1642 struct request *req = mqrq->req;
1643 struct request *prq;
1644 struct mmc_blk_data *md = mq->data;
1645 struct mmc_packed *packed = mqrq->packed;
1646 bool do_rel_wr, do_data_tag;
1647 u32 *packed_cmd_hdr;
1648 u8 hdr_blocks;
1649 u8 i = 1;
1650
1651 BUG_ON(!packed);
1652
1653 mqrq->cmd_type = MMC_PACKED_WRITE;
1654 packed->blocks = 0;
1655 packed->idx_failure = MMC_PACKED_NR_IDX;
1656
1657 packed_cmd_hdr = packed->cmd_hdr;
1658 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1659 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1660 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1661 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1662
1663 /*
1664 * Argument for each entry of packed group
1665 */
1666 list_for_each_entry(prq, &packed->list, queuelist) {
1667 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1668 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1669 (prq->cmd_flags & REQ_META) &&
1670 (rq_data_dir(prq) == WRITE) &&
1671 ((brq->data.blocks * brq->data.blksz) >=
1672 card->ext_csd.data_tag_unit_size);
1673 /* Argument of CMD23 */
1674 packed_cmd_hdr[(i * 2)] =
1675 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1676 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1677 blk_rq_sectors(prq);
1678 /* Argument of CMD18 or CMD25 */
1679 packed_cmd_hdr[((i * 2)) + 1] =
1680 mmc_card_blockaddr(card) ?
1681 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1682 packed->blocks += blk_rq_sectors(prq);
1683 i++;
1684 }
1685
1686 memset(brq, 0, sizeof(struct mmc_blk_request));
1687 brq->mrq.cmd = &brq->cmd;
1688 brq->mrq.data = &brq->data;
1689 brq->mrq.sbc = &brq->sbc;
1690 brq->mrq.stop = &brq->stop;
1691
1692 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1693 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1694 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1695
1696 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1697 brq->cmd.arg = blk_rq_pos(req);
1698 if (!mmc_card_blockaddr(card))
1699 brq->cmd.arg <<= 9;
1700 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1701
1702 brq->data.blksz = 512;
1703 brq->data.blocks = packed->blocks + hdr_blocks;
1704 brq->data.flags |= MMC_DATA_WRITE;
1705
1706 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1707 brq->stop.arg = 0;
1708 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1709
1710 mmc_set_data_timeout(&brq->data, card);
1711
1712 brq->data.sg = mqrq->sg;
1713 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1714
1715 mqrq->mmc_active.mrq = &brq->mrq;
1716 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1717
1718 mmc_queue_bounce_pre(mqrq);
1719}
1720
67716327
AH		 1721static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1722 struct mmc_blk_request *brq, struct request *req,
1723 int ret)
1724{
ce39f9d1
SJ		 1725 struct mmc_queue_req *mq_rq;
1726 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1727
67716327
AH		 1728 /*
1729 * If this is an SD card and we're writing, we can first
1730 * mark the known good sectors as ok.
1731 *
1732 * If the card is not SD, we can still ok written sectors
1733 * as reported by the controller (which might be less than
1734 * the real number of written sectors, but never more).
1735 */
1736 if (mmc_card_sd(card)) {
1737 u32 blocks;
1738
1739 blocks = mmc_sd_num_wr_blocks(card);
1740 if (blocks != (u32)-1) {
ecf8b5d0 1741 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1742 }
1743 } else {
ce39f9d1
SJ		 1744 if (!mmc_packed_cmd(mq_rq->cmd_type))
1745 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1746 }
1747 return ret;
1748}
1749
ce39f9d1
SJ		 1750static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1751{
1752 struct request *prq;
1753 struct mmc_packed *packed = mq_rq->packed;
1754 int idx = packed->idx_failure, i = 0;
1755 int ret = 0;
1756
1757 BUG_ON(!packed);
1758
1759 while (!list_empty(&packed->list)) {
1760 prq = list_entry_rq(packed->list.next);
1761 if (idx == i) {
1762 /* retry from error index */
1763 packed->nr_entries -= idx;
1764 mq_rq->req = prq;
1765 ret = 1;
1766
1767 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1768 list_del_init(&prq->queuelist);
1769 mmc_blk_clear_packed(mq_rq);
1770 }
1771 return ret;
1772 }
1773 list_del_init(&prq->queuelist);
1774 blk_end_request(prq, 0, blk_rq_bytes(prq));
1775 i++;
1776 }
1777
1778 mmc_blk_clear_packed(mq_rq);
1779 return ret;
1780}
1781
1782static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1783{
1784 struct request *prq;
1785 struct mmc_packed *packed = mq_rq->packed;
1786
1787 BUG_ON(!packed);
1788
1789 while (!list_empty(&packed->list)) {
1790 prq = list_entry_rq(packed->list.next);
1791 list_del_init(&prq->queuelist);
1792 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1793 }
1794
1795 mmc_blk_clear_packed(mq_rq);
1796}
1797
1798static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1799 struct mmc_queue_req *mq_rq)
1800{
1801 struct request *prq;
1802 struct request_queue *q = mq->queue;
1803 struct mmc_packed *packed = mq_rq->packed;
1804
1805 BUG_ON(!packed);
1806
1807 while (!list_empty(&packed->list)) {
1808 prq = list_entry_rq(packed->list.prev);
1809 if (prq->queuelist.prev != &packed->list) {
1810 list_del_init(&prq->queuelist);
1811 spin_lock_irq(q->queue_lock);
1812 blk_requeue_request(mq->queue, prq);
1813 spin_unlock_irq(q->queue_lock);
1814 } else {
1815 list_del_init(&prq->queuelist);
1816 }
1817 }
1818
1819 mmc_blk_clear_packed(mq_rq);
1820}
1821
ee8a43a5 1822static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1823{
1824 struct mmc_blk_data *md = mq->data;
1825 struct mmc_card *card = md->queue.card;
1826 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
67716327 1827 int ret = 1, disable_multi = 0, retry = 0, type;
d78d4a8a 1828 enum mmc_blk_status status;
ee8a43a5 1829 struct mmc_queue_req *mq_rq;
a5075eb9 1830 struct request *req = rqc;
ee8a43a5 1831 struct mmc_async_req *areq;
ce39f9d1
SJ		 1832 const u8 packed_nr = 2;
1833 u8 reqs = 0;
1da177e4 1834
ee8a43a5
PF		 1835 if (!rqc && !mq->mqrq_prev->req)
1836 return 0;
98ccf149 1837
ce39f9d1
SJ		 1838 if (rqc)
1839 reqs = mmc_blk_prep_packed_list(mq, rqc);
1840
ee8a43a5
PF		 1841 do {
1842 if (rqc) {
a5075eb9
SD		 1843 /*
1844 * When 4KB native sector is enabled, only 8 blocks
1845 * multiple read or write is allowed
1846 */
1847 if ((brq->data.blocks & 0x07) &&
1848 (card->ext_csd.data_sector_size == 4096)) {
1849 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1850 req->rq_disk->disk_name);
ce39f9d1 1851 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1852 goto cmd_abort;
1853 }
ce39f9d1
SJ		 1854
1855 if (reqs >= packed_nr)
1856 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1857 card, mq);
1858 else
1859 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1860 areq = &mq->mqrq_cur->mmc_active;
1861 } else
1862 areq = NULL;
1863 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1864 if (!areq) {
1865 if (status == MMC_BLK_NEW_REQUEST)
1866 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1867 return 0;
2220eedf 1868 }
ee8a43a5
PF		 1869
1870 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1871 brq = &mq_rq->brq;
1872 req = mq_rq->req;
67716327 1873 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1874 mmc_queue_bounce_post(mq_rq);
98ccf149 1875
d78d4a8a
PF		 1876 switch (status) {
1877 case MMC_BLK_SUCCESS:
1878 case MMC_BLK_PARTIAL:
1879 /*
1880 * A block was successfully transferred.
1881 */
67716327 1882 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1883
1884 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1885 ret = mmc_blk_end_packed_req(mq_rq);
1886 break;
1887 } else {
1888 ret = blk_end_request(req, 0,
d78d4a8a 1889 brq->data.bytes_xfered);
ce39f9d1
SJ		 1890 }
1891
67716327
AH		 1892 /*
1893 * If the blk_end_request function returns non-zero even
1894 * though all data has been transferred and no errors
1895 * were returned by the host controller, it's a bug.
1896 */
ee8a43a5 1897 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 1898 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 1899 __func__, blk_rq_bytes(req),
1900 brq->data.bytes_xfered);
1901 rqc = NULL;
1902 goto cmd_abort;
1903 }
d78d4a8a
PF		 1904 break;
1905 case MMC_BLK_CMD_ERR:
67716327
AH		 1906 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
1907 if (!mmc_blk_reset(md, card->host, type))
1908 break;
1909 goto cmd_abort;
d78d4a8a
PF		 1910 case MMC_BLK_RETRY:
1911 if (retry++ < 5)
a01f3ccf 1912 break;
67716327 1913 /* Fall through */
d78d4a8a 1914 case MMC_BLK_ABORT:
67716327
AH		 1915 if (!mmc_blk_reset(md, card->host, type))
1916 break;
4c2b8f26 1917 goto cmd_abort;
67716327
AH		 1918 case MMC_BLK_DATA_ERR: {
1919 int err;
1920
1921 err = mmc_blk_reset(md, card->host, type);
1922 if (!err)
1923 break;
ce39f9d1
SJ		 1924 if (err == -ENODEV ||
1925 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 1926 goto cmd_abort;
1927 /* Fall through */
1928 }
1929 case MMC_BLK_ECC_ERR:
1930 if (brq->data.blocks > 1) {
1931 /* Redo read one sector at a time */
6606110d
JP		 1932 pr_warn("%s: retrying using single block read\n",
1933 req->rq_disk->disk_name);
67716327
AH		 1934 disable_multi = 1;
1935 break;
1936 }
d78d4a8a
PF		 1937 /*
1938 * After an error, we redo I/O one sector at a
1939 * time, so we only reach here after trying to
1940 * read a single sector.
1941 */
ecf8b5d0 1942 ret = blk_end_request(req, -EIO,
d78d4a8a 1943 brq->data.blksz);
ee8a43a5
PF		 1944 if (!ret)
1945 goto start_new_req;
d78d4a8a 1946 break;
a8ad82cc
SRT		 1947 case MMC_BLK_NOMEDIUM:
1948 goto cmd_abort;
2220eedf
KD		 1949 default:
1950 pr_err("%s: Unhandled return value (%d)",
1951 req->rq_disk->disk_name, status);
1952 goto cmd_abort;
4c2b8f26
RKAL		 1953 }
1954
ee8a43a5 1955 if (ret) {
ce39f9d1
SJ		 1956 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1957 if (!mq_rq->packed->retries)
1958 goto cmd_abort;
1959 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1960 mmc_start_req(card->host,
1961 &mq_rq->mmc_active, NULL);
1962 } else {
1963
1964 /*
1965 * In case of a incomplete request
1966 * prepare it again and resend.
1967 */
1968 mmc_blk_rw_rq_prep(mq_rq, card,
1969 disable_multi, mq);
1970 mmc_start_req(card->host,
1971 &mq_rq->mmc_active, NULL);
1972 }
ee8a43a5 1973 }
1da177e4
LT		 1974 } while (ret);
1975
1da177e4
LT		 1976 return 1;
1977
a01f3ccf 1978 cmd_abort:
ce39f9d1
SJ		 1979 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1980 mmc_blk_abort_packed_req(mq_rq);
1981 } else {
1982 if (mmc_card_removed(card))
1983 req->cmd_flags |= REQ_QUIET;
1984 while (ret)
1985 ret = blk_end_request(req, -EIO,
1986 blk_rq_cur_bytes(req));
1987 }
1da177e4 1988
ee8a43a5
PF		 1989 start_new_req:
1990 if (rqc) {
7a81902f
SJ		 1991 if (mmc_card_removed(card)) {
1992 rqc->cmd_flags |= REQ_QUIET;
1993 blk_end_request_all(rqc, -EIO);
1994 } else {
ce39f9d1
SJ		 1995 /*
1996 * If current request is packed, it needs to put back.
1997 */
1998 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
1999 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2000
7a81902f
SJ		 2001 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2002 mmc_start_req(card->host,
2003 &mq->mqrq_cur->mmc_active, NULL);
2004 }
ee8a43a5
PF		 2005 }
2006
1da177e4
LT		 2007 return 0;
2008}
2009
bd788c96
AH		 2010static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2011{
1a258db6
AW		 2012 int ret;
2013 struct mmc_blk_data *md = mq->data;
2014 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2015 struct mmc_host *host = card->host;
2016 unsigned long flags;
f662ae48 2017 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2018
ee8a43a5
PF		 2019 if (req && !mq->mqrq_prev->req)
2020 /* claim host only for the first request */
e94cfef6 2021 mmc_get_card(card);
ee8a43a5 2022
371a689f
AW		 2023 ret = mmc_blk_part_switch(card, md);
2024 if (ret) {
0d7d85ca 2025 if (req) {
ecf8b5d0 2026 blk_end_request_all(req, -EIO);
0d7d85ca 2027 }
371a689f
AW		 2028 ret = 0;
2029 goto out;
2030 }
1a258db6 2031
2220eedf 2032 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2033 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2034 /* complete ongoing async transfer before issuing discard */
2035 if (card->host->areq)
2036 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2037 if (req->cmd_flags & REQ_SECURE)
1a258db6 2038 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2039 else
1a258db6 2040 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2041 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2042 /* complete ongoing async transfer before issuing flush */
2043 if (card->host->areq)
2044 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2045 ret = mmc_blk_issue_flush(mq, req);
49804548 2046 } else {
2220eedf
KD		 2047 if (!req && host->areq) {
2048 spin_lock_irqsave(&host->context_info.lock, flags);
2049 host->context_info.is_waiting_last_req = true;
2050 spin_unlock_irqrestore(&host->context_info.lock, flags);
2051 }
1a258db6 2052 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2053 }
1a258db6 2054
371a689f 2055out:
ef3a69c7 2056 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2057 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2058 /*
2059 * Release host when there are no more requests
2060 * and after special request(discard, flush) is done.
2061 * In case sepecial request, there is no reentry to
2062 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2063 */
e94cfef6 2064 mmc_put_card(card);
1a258db6 2065 return ret;
bd788c96 2066}
1da177e4 2067
a6f6c96b
RK		 2068static inline int mmc_blk_readonly(struct mmc_card *card)
2069{
2070 return mmc_card_readonly(card) ||
2071 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2072}
2073
371a689f
AW		 2074static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2075 struct device *parent,
2076 sector_t size,
2077 bool default_ro,
add710ea
JR		 2078 const char *subname,
2079 int area_type)
1da177e4
LT		 2080{
2081 struct mmc_blk_data *md;
2082 int devidx, ret;
2083
5e71b7a6
OJ		 2084 devidx = find_first_zero_bit(dev_use, max_devices);
2085 if (devidx >= max_devices)
1da177e4
LT		 2086 return ERR_PTR(-ENOSPC);
2087 __set_bit(devidx, dev_use);
2088
dd00cc48 2089 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2090 if (!md) {
2091 ret = -ENOMEM;
2092 goto out;
2093 }
1da177e4 2094
f06c9153
AW		 2095 /*
2096 * !subname implies we are creating main mmc_blk_data that will be
fc95e30b 2097 * associated with mmc_card with dev_set_drvdata. Due to device
f06c9153
AW		 2098 * partitions, devidx will not coincide with a per-physical card
2099 * index anymore so we keep track of a name index.
2100 */
2101 if (!subname) {
2102 md->name_idx = find_first_zero_bit(name_use, max_devices);
2103 __set_bit(md->name_idx, name_use);
add710ea 2104 } else
f06c9153
AW		 2105 md->name_idx = ((struct mmc_blk_data *)
2106 dev_to_disk(parent)->private_data)->name_idx;
2107
add710ea
JR		 2108 md->area_type = area_type;
2109
a6f6c96b
RK		 2110 /*
2111 * Set the read-only status based on the supported commands
2112 * and the write protect switch.
2113 */
2114 md->read_only = mmc_blk_readonly(card);
1da177e4 2115
5e71b7a6 2116 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2117 if (md->disk == NULL) {
2118 ret = -ENOMEM;
2119 goto err_kfree;
2120 }
1da177e4 2121
a6f6c96b 2122 spin_lock_init(&md->lock);
371a689f 2123 INIT_LIST_HEAD(&md->part);
a6f6c96b 2124 md->usage = 1;
1da177e4 2125
d09408ad 2126 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2127 if (ret)
2128 goto err_putdisk;
1da177e4 2129
a6f6c96b
RK		 2130 md->queue.issue_fn = mmc_blk_issue_rq;
2131 md->queue.data = md;
d2b18394 2132
fe6b4c88 2133 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2134 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2135 md->disk->fops = &mmc_bdops;
2136 md->disk->private_data = md;
2137 md->disk->queue = md->queue.queue;
371a689f
AW		 2138 md->disk->driverfs_dev = parent;
2139 set_disk_ro(md->disk, md->read_only || default_ro);
f5b4d71f 2140 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2141 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2142
2143 /*
2144 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2145 *
2146 * - be set for removable media with permanent block devices
2147 * - be unset for removable block devices with permanent media
2148 *
2149 * Since MMC block devices clearly fall under the second
2150 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2151 * should use the block device creation/destruction hotplug
2152 * messages to tell when the card is present.
2153 */
2154
f06c9153
AW		 2155 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2156 "mmcblk%d%s", md->name_idx, subname ? subname : "");
a6f6c96b 2157
a5075eb9
SD		 2158 if (mmc_card_mmc(card))
2159 blk_queue_logical_block_size(md->queue.queue,
2160 card->ext_csd.data_sector_size);
2161 else
2162 blk_queue_logical_block_size(md->queue.queue, 512);
2163
371a689f 2164 set_capacity(md->disk, size);
d0c97cfb 2165
f0d89972
AW		 2166 if (mmc_host_cmd23(card->host)) {
2167 if (mmc_card_mmc(card) ||
2168 (mmc_card_sd(card) &&
2169 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2170 md->flags |= MMC_BLK_CMD23;
2171 }
d0c97cfb
AW		 2172
2173 if (mmc_card_mmc(card) &&
2174 md->flags & MMC_BLK_CMD23 &&
2175 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2176 card->ext_csd.rel_sectors)) {
2177 md->flags |= MMC_BLK_REL_WR;
2178 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2179 }
2180
ce39f9d1
SJ		 2181 if (mmc_card_mmc(card) &&
2182 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2183 (md->flags & MMC_BLK_CMD23) &&
2184 card->ext_csd.packed_event_en) {
2185 if (!mmc_packed_init(&md->queue, card))
2186 md->flags |= MMC_BLK_PACKED_CMD;
2187 }
2188
371a689f
AW		 2189 return md;
2190
2191 err_putdisk:
2192 put_disk(md->disk);
2193 err_kfree:
2194 kfree(md);
2195 out:
2196 return ERR_PTR(ret);
2197}
2198
2199static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2200{
2201 sector_t size;
2202 struct mmc_blk_data *md;
a6f6c96b 2203
85a18ad9
PO		 2204 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2205 /*
2206 * The EXT_CSD sector count is in number or 512 byte
2207 * sectors.
2208 */
371a689f 2209 size = card->ext_csd.sectors;
85a18ad9
PO		 2210 } else {
2211 /*
2212 * The CSD capacity field is in units of read_blkbits.
2213 * set_capacity takes units of 512 bytes.
2214 */
371a689f 2215 size = card->csd.capacity << (card->csd.read_blkbits - 9);
85a18ad9 2216 }
371a689f 2217
add710ea
JR		 2218 md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2219 MMC_BLK_DATA_AREA_MAIN);
1da177e4 2220 return md;
371a689f 2221}
a6f6c96b 2222
371a689f
AW		 2223static int mmc_blk_alloc_part(struct mmc_card *card,
2224 struct mmc_blk_data *md,
2225 unsigned int part_type,
2226 sector_t size,
2227 bool default_ro,
add710ea
JR		 2228 const char *subname,
2229 int area_type)
371a689f
AW		 2230{
2231 char cap_str[10];
2232 struct mmc_blk_data *part_md;
2233
2234 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2235 subname, area_type);
371a689f
AW		 2236 if (IS_ERR(part_md))
2237 return PTR_ERR(part_md);
2238 part_md->part_type = part_type;
2239 list_add(&part_md->part, &md->part);
2240
2241 string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2,
2242 cap_str, sizeof(cap_str));
a3c76eb9 2243 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2244 part_md->disk->disk_name, mmc_card_id(card),
2245 mmc_card_name(card), part_md->part_type, cap_str);
2246 return 0;
2247}
2248
e0c368d5
NJ		 2249/* MMC Physical partitions consist of two boot partitions and
2250 * up to four general purpose partitions.
2251 * For each partition enabled in EXT_CSD a block device will be allocatedi
2252 * to provide access to the partition.
2253 */
2254
371a689f
AW		 2255static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2256{
e0c368d5 2257 int idx, ret = 0;
371a689f
AW		 2258
2259 if (!mmc_card_mmc(card))
2260 return 0;
2261
e0c368d5
NJ		 2262 for (idx = 0; idx < card->nr_parts; idx++) {
2263 if (card->part[idx].size) {
2264 ret = mmc_blk_alloc_part(card, md,
2265 card->part[idx].part_cfg,
2266 card->part[idx].size >> 9,
2267 card->part[idx].force_ro,
add710ea
JR		 2268 card->part[idx].name,
2269 card->part[idx].area_type);
e0c368d5
NJ		 2270 if (ret)
2271 return ret;
2272 }
371a689f
AW		 2273 }
2274
2275 return ret;
1da177e4
LT		 2276}
2277
371a689f
AW		 2278static void mmc_blk_remove_req(struct mmc_blk_data *md)
2279{
add710ea
JR		 2280 struct mmc_card *card;
2281
371a689f 2282 if (md) {
fdfa20c1
PT		 2283 /*
2284 * Flush remaining requests and free queues. It
2285 * is freeing the queue that stops new requests
2286 * from being accepted.
2287 */
8efb83a2 2288 card = md->queue.card;
fdfa20c1
PT		 2289 mmc_cleanup_queue(&md->queue);
2290 if (md->flags & MMC_BLK_PACKED_CMD)
2291 mmc_packed_clean(&md->queue);
371a689f
AW		 2292 if (md->disk->flags & GENHD_FL_UP) {
2293 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2294 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2295 card->ext_csd.boot_ro_lockable)
2296 device_remove_file(disk_to_dev(md->disk),
2297 &md->power_ro_lock);
371a689f 2298
371a689f
AW		 2299 del_gendisk(md->disk);
2300 }
371a689f
AW		 2301 mmc_blk_put(md);
2302 }
2303}
2304
2305static void mmc_blk_remove_parts(struct mmc_card *card,
2306 struct mmc_blk_data *md)
2307{
2308 struct list_head *pos, *q;
2309 struct mmc_blk_data *part_md;
2310
f06c9153 2311 __clear_bit(md->name_idx, name_use);
371a689f
AW		 2312 list_for_each_safe(pos, q, &md->part) {
2313 part_md = list_entry(pos, struct mmc_blk_data, part);
2314 list_del(pos);
2315 mmc_blk_remove_req(part_md);
2316 }
2317}
2318
2319static int mmc_add_disk(struct mmc_blk_data *md)
2320{
2321 int ret;
add710ea 2322 struct mmc_card *card = md->queue.card;
371a689f
AW		 2323
2324 add_disk(md->disk);
2325 md->force_ro.show = force_ro_show;
2326 md->force_ro.store = force_ro_store;
641c3187 2327 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2328 md->force_ro.attr.name = "force_ro";
2329 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2330 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2331 if (ret)
add710ea
JR		 2332 goto force_ro_fail;
2333
2334 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2335 card->ext_csd.boot_ro_lockable) {
88187398 2336 umode_t mode;
add710ea
JR		 2337
2338 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2339 mode = S_IRUGO;
2340 else
2341 mode = S_IRUGO | S_IWUSR;
2342
2343 md->power_ro_lock.show = power_ro_lock_show;
2344 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2345 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2346 md->power_ro_lock.attr.mode = mode;
2347 md->power_ro_lock.attr.name =
2348 "ro_lock_until_next_power_on";
2349 ret = device_create_file(disk_to_dev(md->disk),
2350 &md->power_ro_lock);
2351 if (ret)
2352 goto power_ro_lock_fail;
2353 }
2354 return ret;
2355
2356power_ro_lock_fail:
2357 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2358force_ro_fail:
2359 del_gendisk(md->disk);
371a689f
AW		 2360
2361 return ret;
2362}
2363
c59d4473
CB		 2364#define CID_MANFID_SANDISK 0x2
2365#define CID_MANFID_TOSHIBA 0x11
2366#define CID_MANFID_MICRON 0x13
3550ccdb 2367#define CID_MANFID_SAMSUNG 0x15
c59d4473 2368
6f60c222
AW		 2369static const struct mmc_fixup blk_fixups[] =
2370{
c59d4473
CB		 2371 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2372 MMC_QUIRK_INAND_CMD38),
2373 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2374 MMC_QUIRK_INAND_CMD38),
2375 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2376 MMC_QUIRK_INAND_CMD38),
2377 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2378 MMC_QUIRK_INAND_CMD38),
2379 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2380 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2381
2382 /*
2383 * Some MMC cards experience performance degradation with CMD23
2384 * instead of CMD12-bounded multiblock transfers. For now we'll
2385 * black list what's bad...
2386 * - Certain Toshiba cards.
2387 *
2388 * N.B. This doesn't affect SD cards.
2389 */
c59d4473 2390 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2391 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2392 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2393 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2394 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2395 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2396
2397 /*
2398 * Some Micron MMC cards needs longer data read timeout than
2399 * indicated in CSD.
2400 */
c59d4473 2401 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2402 MMC_QUIRK_LONG_READ_TIME),
2403
3550ccdb
IC		 2404 /*
2405 * On these Samsung MoviNAND parts, performing secure erase or
2406 * secure trim can result in unrecoverable corruption due to a
2407 * firmware bug.
2408 */
2409 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2410 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2411 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2412 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2413 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2414 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2415 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2416 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2417 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2418 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2419 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2420 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2421 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2422 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2423 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2424 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2425
6f60c222
AW		 2426 END_FIXUP
2427};
2428
6685ac62 2429static int mmc_blk_probe(struct device *dev)
1da177e4 2430{
6685ac62 2431 struct mmc_card *card = mmc_dev_to_card(dev);
371a689f 2432 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2433 char cap_str[10];
2434
912490db
PO		 2435 /*
2436 * Check that the card supports the command class(es) we need.
2437 */
2438 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2439 return -ENODEV;
2440
5204d00f
LC		 2441 mmc_fixup_device(card, blk_fixups);
2442
1da177e4
LT		 2443 md = mmc_blk_alloc(card);
2444 if (IS_ERR(md))
2445 return PTR_ERR(md);
2446
444122fd 2447 string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2,
a7bbb573 2448 cap_str, sizeof(cap_str));
a3c76eb9 2449 pr_info("%s: %s %s %s %s\n",
1da177e4 2450 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2451 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2452
371a689f
AW		 2453 if (mmc_blk_alloc_parts(card, md))
2454 goto out;
2455
fc95e30b 2456 dev_set_drvdata(dev, md);
6f60c222 2457
371a689f
AW		 2458 if (mmc_add_disk(md))
2459 goto out;
2460
2461 list_for_each_entry(part_md, &md->part, part) {
2462 if (mmc_add_disk(part_md))
2463 goto out;
2464 }
e94cfef6
UH		 2465
2466 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2467 pm_runtime_use_autosuspend(&card->dev);
2468
2469 /*
2470 * Don't enable runtime PM for SD-combo cards here. Leave that
2471 * decision to be taken during the SDIO init sequence instead.
2472 */
2473 if (card->type != MMC_TYPE_SD_COMBO) {
2474 pm_runtime_set_active(&card->dev);
2475 pm_runtime_enable(&card->dev);
2476 }
2477
1da177e4
LT		 2478 return 0;
2479
2480 out:
371a689f
AW		 2481 mmc_blk_remove_parts(card, md);
2482 mmc_blk_remove_req(md);
5865f287 2483 return 0;
1da177e4
LT		 2484}
2485
6685ac62 2486static int mmc_blk_remove(struct device *dev)
1da177e4 2487{
6685ac62 2488 struct mmc_card *card = mmc_dev_to_card(dev);
fc95e30b 2489 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4 2490
371a689f 2491 mmc_blk_remove_parts(card, md);
e94cfef6 2492 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2493 mmc_claim_host(card->host);
2494 mmc_blk_part_switch(card, md);
2495 mmc_release_host(card->host);
e94cfef6
UH		 2496 if (card->type != MMC_TYPE_SD_COMBO)
2497 pm_runtime_disable(&card->dev);
2498 pm_runtime_put_noidle(&card->dev);
371a689f 2499 mmc_blk_remove_req(md);
fc95e30b 2500 dev_set_drvdata(dev, NULL);
6685ac62
UH		 2501
2502 return 0;
1da177e4
LT		 2503}
2504
6685ac62 2505static int _mmc_blk_suspend(struct device *dev)
1da177e4 2506{
371a689f 2507 struct mmc_blk_data *part_md;
fc95e30b 2508 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2509
2510 if (md) {
2511 mmc_queue_suspend(&md->queue);
371a689f
AW		 2512 list_for_each_entry(part_md, &md->part, part) {
2513 mmc_queue_suspend(&part_md->queue);
2514 }
1da177e4
LT		 2515 }
2516 return 0;
2517}
2518
6685ac62 2519static void mmc_blk_shutdown(struct device *dev)
76287748 2520{
6685ac62 2521 _mmc_blk_suspend(dev);
76287748
UH		 2522}
2523
0967edc6
UH		 2524#ifdef CONFIG_PM_SLEEP
2525static int mmc_blk_suspend(struct device *dev)
76287748 2526{
6685ac62 2527 return _mmc_blk_suspend(dev);
76287748
UH		 2528}
2529
0967edc6 2530static int mmc_blk_resume(struct device *dev)
1da177e4 2531{
371a689f 2532 struct mmc_blk_data *part_md;
fc95e30b 2533 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2534
2535 if (md) {
371a689f
AW		 2536 /*
2537 * Resume involves the card going into idle state,
2538 * so current partition is always the main one.
2539 */
2540 md->part_curr = md->part_type;
1da177e4 2541 mmc_queue_resume(&md->queue);
371a689f
AW		 2542 list_for_each_entry(part_md, &md->part, part) {
2543 mmc_queue_resume(&part_md->queue);
2544 }
1da177e4
LT		 2545 }
2546 return 0;
2547}
1da177e4
LT		 2548#endif
2549
0967edc6
UH		 2550static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2551
6685ac62
UH		 2552static struct device_driver mmc_driver = {
2553 .name = "mmcblk",
2554 .pm = &mmc_blk_pm_ops,
1da177e4
LT		 2555 .probe = mmc_blk_probe,
2556 .remove = mmc_blk_remove,
76287748 2557 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2558};
2559
2560static int __init mmc_blk_init(void)
2561{
9d4e98e9 2562 int res;
1da177e4 2563
5e71b7a6
OJ		 2564 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2565 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2566
2567 max_devices = 256 / perdev_minors;
2568
fe6b4c88
PO		 2569 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2570 if (res)
1da177e4 2571 goto out;
1da177e4 2572
9d4e98e9
AM		 2573 res = mmc_register_driver(&mmc_driver);
2574 if (res)
2575 goto out2;
1da177e4 2576
9d4e98e9
AM		 2577 return 0;
2578 out2:
2579 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2580 out:
2581 return res;
2582}
2583
2584static void __exit mmc_blk_exit(void)
2585{
2586 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2587 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2588}
2589
2590module_init(mmc_blk_init);
2591module_exit(mmc_blk_exit);
2592
2593MODULE_LICENSE("GPL");
2594MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2595
Linux kernel - Deliverables
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