]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/mmc/card/block.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: MMC_GOLDFISH should depend on HAS_DMA
[mirror_ubuntu-artful-kernel.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");
829b6962
AS		 50
51#ifdef KERNEL
5e71b7a6
OJ		 52#ifdef MODULE_PARAM_PREFIX
53#undef MODULE_PARAM_PREFIX
54#endif
55#define MODULE_PARAM_PREFIX "mmcblk."
829b6962 56#endif
5e71b7a6 57
6a7a6b45
AW		 58#define INAND_CMD38_ARG_EXT_CSD 113
59#define INAND_CMD38_ARG_ERASE 0x00
60#define INAND_CMD38_ARG_TRIM 0x01
61#define INAND_CMD38_ARG_SECERASE 0x80
62#define INAND_CMD38_ARG_SECTRIM1 0x81
63#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 64#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 65#define MMC_SANITIZE_REQ_TIMEOUT 240000
66#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 67
ce39f9d1
SJ		 68#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
69 (req->cmd_flags & REQ_META)) && \
70 (rq_data_dir(req) == WRITE))
71#define PACKED_CMD_VER 0x01
72#define PACKED_CMD_WR 0x02
73
5e71b7a6 74static DEFINE_MUTEX(block_mutex);
6b0b6285 75
1da177e4 76/*
5e71b7a6
OJ		 77 * The defaults come from config options but can be overriden by module
78 * or bootarg options.
1da177e4 79 */
5e71b7a6 80static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
1dff3144 81
5e71b7a6
OJ		 82/*
83 * We've only got one major, so number of mmcblk devices is
a26eba61
BH		 84 * limited to (1 << 20) / number of minors per device. It is also
85 * currently limited by the size of the static bitmaps below.
5e71b7a6
OJ		 86 */
87static int max_devices;
88
a26eba61
BH		 89#define MAX_DEVICES 256
90
91/* TODO: Replace these with struct ida */
92static DECLARE_BITMAP(dev_use, MAX_DEVICES);
93static DECLARE_BITMAP(name_use, MAX_DEVICES);
1da177e4 94
1da177e4
LT		 95/*
96 * There is one mmc_blk_data per slot.
97 */
98struct mmc_blk_data {
99 spinlock_t lock;
100 struct gendisk *disk;
101 struct mmc_queue queue;
371a689f 102 struct list_head part;
1da177e4 103
d0c97cfb
AW		 104 unsigned int flags;
105#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
106#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 107#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 108
1da177e4 109 unsigned int usage;
a6f6c96b 110 unsigned int read_only;
371a689f 111 unsigned int part_type;
f06c9153 112 unsigned int name_idx;
67716327
AH		 113 unsigned int reset_done;
114#define MMC_BLK_READ BIT(0)
115#define MMC_BLK_WRITE BIT(1)
116#define MMC_BLK_DISCARD BIT(2)
117#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 118
119 /*
120 * Only set in main mmc_blk_data associated
fc95e30b 121 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 122 * track of the current selected device partition.
123 */
124 unsigned int part_curr;
125 struct device_attribute force_ro;
add710ea
JR		 126 struct device_attribute power_ro_lock;
127 int area_type;
1da177e4
LT		 128};
129
a621aaed 130static DEFINE_MUTEX(open_lock);
1da177e4 131
ce39f9d1
SJ		 132enum {
133 MMC_PACKED_NR_IDX = -1,
134 MMC_PACKED_NR_ZERO,
135 MMC_PACKED_NR_SINGLE,
136};
137
5e71b7a6
OJ		 138module_param(perdev_minors, int, 0444);
139MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
140
8d1e977d
LP		 141static inline int mmc_blk_part_switch(struct mmc_card *card,
142 struct mmc_blk_data *md);
143static int get_card_status(struct mmc_card *card, u32 *status, int retries);
144
ce39f9d1
SJ		 145static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
146{
147 struct mmc_packed *packed = mqrq->packed;
148
149 BUG_ON(!packed);
150
151 mqrq->cmd_type = MMC_PACKED_NONE;
152 packed->nr_entries = MMC_PACKED_NR_ZERO;
153 packed->idx_failure = MMC_PACKED_NR_IDX;
154 packed->retries = 0;
155 packed->blocks = 0;
156}
157
1da177e4
LT		 158static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
159{
160 struct mmc_blk_data *md;
161
a621aaed 162 mutex_lock(&open_lock);
1da177e4
LT		 163 md = disk->private_data;
164 if (md && md->usage == 0)
165 md = NULL;
166 if (md)
167 md->usage++;
a621aaed 168 mutex_unlock(&open_lock);
1da177e4
LT		 169
170 return md;
171}
172
371a689f
AW		 173static inline int mmc_get_devidx(struct gendisk *disk)
174{
175 int devmaj = MAJOR(disk_devt(disk));
176 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
177
178 if (!devmaj)
179 devidx = disk->first_minor / perdev_minors;
180 return devidx;
181}
182
1da177e4
LT		 183static void mmc_blk_put(struct mmc_blk_data *md)
184{
a621aaed 185 mutex_lock(&open_lock);
1da177e4
LT		 186 md->usage--;
187 if (md->usage == 0) {
371a689f 188 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 189 blk_cleanup_queue(md->queue.queue);
190
1dff3144
DW		 191 __clear_bit(devidx, dev_use);
192
1da177e4 193 put_disk(md->disk);
1da177e4
LT		 194 kfree(md);
195 }
a621aaed 196 mutex_unlock(&open_lock);
1da177e4
LT		 197}
198
add710ea
JR		 199static ssize_t power_ro_lock_show(struct device *dev,
200 struct device_attribute *attr, char *buf)
201{
202 int ret;
203 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
204 struct mmc_card *card = md->queue.card;
205 int locked = 0;
206
207 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
208 locked = 2;
209 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
210 locked = 1;
211
212 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
213
9098f84c
TW		 214 mmc_blk_put(md);
215
add710ea
JR		 216 return ret;
217}
218
219static ssize_t power_ro_lock_store(struct device *dev,
220 struct device_attribute *attr, const char *buf, size_t count)
221{
222 int ret;
223 struct mmc_blk_data *md, *part_md;
224 struct mmc_card *card;
225 unsigned long set;
226
227 if (kstrtoul(buf, 0, &set))
228 return -EINVAL;
229
230 if (set != 1)
231 return count;
232
233 md = mmc_blk_get(dev_to_disk(dev));
234 card = md->queue.card;
235
e94cfef6 236 mmc_get_card(card);
add710ea
JR		 237
238 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
239 card->ext_csd.boot_ro_lock |
240 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
241 card->ext_csd.part_time);
242 if (ret)
243 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
244 else
245 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
246
e94cfef6 247 mmc_put_card(card);
add710ea
JR		 248
249 if (!ret) {
250 pr_info("%s: Locking boot partition ro until next power on\n",
251 md->disk->disk_name);
252 set_disk_ro(md->disk, 1);
253
254 list_for_each_entry(part_md, &md->part, part)
255 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
256 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
257 set_disk_ro(part_md->disk, 1);
258 }
259 }
260
261 mmc_blk_put(md);
262 return count;
263}
264
371a689f
AW		 265static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
266 char *buf)
267{
268 int ret;
269 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
270
0031a98a 271 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 272 get_disk_ro(dev_to_disk(dev)) ^
273 md->read_only);
274 mmc_blk_put(md);
275 return ret;
276}
277
278static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
280{
281 int ret;
282 char *end;
283 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
284 unsigned long set = simple_strtoul(buf, &end, 0);
285 if (end == buf) {
286 ret = -EINVAL;
287 goto out;
288 }
289
290 set_disk_ro(dev_to_disk(dev), set || md->read_only);
291 ret = count;
292out:
293 mmc_blk_put(md);
294 return ret;
295}
296
a5a1561f 297static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 298{
a5a1561f 299 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 300 int ret = -ENXIO;
301
2a48fc0a 302 mutex_lock(&block_mutex);
1da177e4
LT		 303 if (md) {
304 if (md->usage == 2)
a5a1561f 305 check_disk_change(bdev);
1da177e4 306 ret = 0;
a00fc090 307
a5a1561f 308 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 309 mmc_blk_put(md);
a00fc090 310 ret = -EROFS;
70bb0896 311 }
1da177e4 312 }
2a48fc0a 313 mutex_unlock(&block_mutex);
1da177e4
LT		 314
315 return ret;
316}
317
db2a144b 318static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 319{
a5a1561f 320 struct mmc_blk_data *md = disk->private_data;
1da177e4 321
2a48fc0a 322 mutex_lock(&block_mutex);
1da177e4 323 mmc_blk_put(md);
2a48fc0a 324 mutex_unlock(&block_mutex);
1da177e4
LT		 325}
326
327static int
a885c8c4 328mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 329{
a885c8c4
CH		 330 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
331 geo->heads = 4;
332 geo->sectors = 16;
333 return 0;
1da177e4
LT		 334}
335
cb87ea28
JC		 336struct mmc_blk_ioc_data {
337 struct mmc_ioc_cmd ic;
338 unsigned char *buf;
339 u64 buf_bytes;
340};
341
342static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
343 struct mmc_ioc_cmd __user *user)
344{
345 struct mmc_blk_ioc_data *idata;
346 int err;
347
348 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
349 if (!idata) {
350 err = -ENOMEM;
aea253ec 351 goto out;
cb87ea28
JC		 352 }
353
354 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
355 err = -EFAULT;
aea253ec 356 goto idata_err;
cb87ea28
JC		 357 }
358
359 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
360 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
361 err = -EOVERFLOW;
aea253ec 362 goto idata_err;
cb87ea28
JC		 363 }
364
4d6144de
JR		 365 if (!idata->buf_bytes)
366 return idata;
367
cb87ea28
JC		 368 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
369 if (!idata->buf) {
370 err = -ENOMEM;
aea253ec 371 goto idata_err;
cb87ea28
JC		 372 }
373
374 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
375 idata->ic.data_ptr, idata->buf_bytes)) {
376 err = -EFAULT;
377 goto copy_err;
378 }
379
380 return idata;
381
382copy_err:
383 kfree(idata->buf);
aea253ec 384idata_err:
cb87ea28 385 kfree(idata);
aea253ec 386out:
cb87ea28 387 return ERR_PTR(err);
cb87ea28
JC		 388}
389
a5f5774c
JH		 390static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
391 struct mmc_blk_ioc_data *idata)
392{
393 struct mmc_ioc_cmd *ic = &idata->ic;
394
395 if (copy_to_user(&(ic_ptr->response), ic->response,
396 sizeof(ic->response)))
397 return -EFAULT;
398
399 if (!idata->ic.write_flag) {
400 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
401 idata->buf, idata->buf_bytes))
402 return -EFAULT;
403 }
404
405 return 0;
406}
407
8d1e977d
LP		 408static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
409 u32 retries_max)
410{
411 int err;
412 u32 retry_count = 0;
413
414 if (!status || !retries_max)
415 return -EINVAL;
416
417 do {
418 err = get_card_status(card, status, 5);
419 if (err)
420 break;
421
422 if (!R1_STATUS(*status) &&
423 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
424 break; /* RPMB programming operation complete */
425
426 /*
427 * Rechedule to give the MMC device a chance to continue
428 * processing the previous command without being polled too
429 * frequently.
430 */
431 usleep_range(1000, 5000);
432 } while (++retry_count < retries_max);
433
434 if (retry_count == retries_max)
435 err = -EPERM;
436
437 return err;
438}
439
775a9362
ME		 440static int ioctl_do_sanitize(struct mmc_card *card)
441{
442 int err;
443
a2d1086d 444 if (!mmc_can_sanitize(card)) {
775a9362
ME		 445 pr_warn("%s: %s - SANITIZE is not supported\n",
446 mmc_hostname(card->host), __func__);
447 err = -EOPNOTSUPP;
448 goto out;
449 }
450
451 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
452 mmc_hostname(card->host), __func__);
453
454 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
455 EXT_CSD_SANITIZE_START, 1,
456 MMC_SANITIZE_REQ_TIMEOUT);
457
458 if (err)
459 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
460 mmc_hostname(card->host), __func__, err);
461
462 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
463 __func__);
464out:
465 return err;
466}
467
a5f5774c
JH		 468static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
469 struct mmc_blk_ioc_data *idata)
cb87ea28 470{
cb87ea28
JC		 471 struct mmc_command cmd = {0};
472 struct mmc_data data = {0};
ad5fd972 473 struct mmc_request mrq = {NULL};
cb87ea28
JC		 474 struct scatterlist sg;
475 int err;
8d1e977d
LP		 476 int is_rpmb = false;
477 u32 status = 0;
cb87ea28 478
a5f5774c
JH		 479 if (!card || !md || !idata)
480 return -EINVAL;
cb87ea28 481
8d1e977d
LP		 482 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
483 is_rpmb = true;
484
4d6144de
JR		 485 cmd.opcode = idata->ic.opcode;
486 cmd.arg = idata->ic.arg;
487 cmd.flags = idata->ic.flags;
488
489 if (idata->buf_bytes) {
490 data.sg = &sg;
491 data.sg_len = 1;
492 data.blksz = idata->ic.blksz;
493 data.blocks = idata->ic.blocks;
494
495 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
496
497 if (idata->ic.write_flag)
498 data.flags = MMC_DATA_WRITE;
499 else
500 data.flags = MMC_DATA_READ;
501
502 /* data.flags must already be set before doing this. */
503 mmc_set_data_timeout(&data, card);
504
505 /* Allow overriding the timeout_ns for empirical tuning. */
506 if (idata->ic.data_timeout_ns)
507 data.timeout_ns = idata->ic.data_timeout_ns;
508
509 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
510 /*
511 * Pretend this is a data transfer and rely on the
512 * host driver to compute timeout. When all host
513 * drivers support cmd.cmd_timeout for R1B, this
514 * can be changed to:
515 *
516 * mrq.data = NULL;
517 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
518 */
519 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
520 }
521
522 mrq.data = &data;
523 }
524
525 mrq.cmd = &cmd;
526
8d1e977d
LP		 527 err = mmc_blk_part_switch(card, md);
528 if (err)
a5f5774c 529 return err;
8d1e977d 530
cb87ea28
JC		 531 if (idata->ic.is_acmd) {
532 err = mmc_app_cmd(card->host, card);
533 if (err)
a5f5774c 534 return err;
cb87ea28
JC		 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)
a5f5774c 541 return err;
8d1e977d
LP		 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
a5f5774c 552 return err;
775a9362
ME		 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);
a5f5774c 560 return cmd.error;
cb87ea28
JC		 561 }
562 if (data.error) {
563 dev_err(mmc_dev(card->host), "%s: data error %d\n",
564 __func__, data.error);
a5f5774c 565 return data.error;
cb87ea28
JC		 566 }
567
568 /*
569 * According to the SD specs, some commands require a delay after
570 * issuing the command.
571 */
572 if (idata->ic.postsleep_min_us)
573 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
574
a5f5774c 575 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
cb87ea28 576
8d1e977d
LP		 577 if (is_rpmb) {
578 /*
579 * Ensure RPMB command has completed by polling CMD13
580 * "Send Status".
581 */
582 err = ioctl_rpmb_card_status_poll(card, &status, 5);
583 if (err)
584 dev_err(mmc_dev(card->host),
585 "%s: Card Status=0x%08X, error %d\n",
586 __func__, status, err);
587 }
588
a5f5774c
JH		 589 return err;
590}
591
592static int mmc_blk_ioctl_cmd(struct block_device *bdev,
593 struct mmc_ioc_cmd __user *ic_ptr)
594{
595 struct mmc_blk_ioc_data *idata;
596 struct mmc_blk_data *md;
597 struct mmc_card *card;
b093410c 598 int err = 0, ioc_err = 0;
a5f5774c
JH		 599
600 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
601 if (IS_ERR(idata))
602 return PTR_ERR(idata);
603
604 md = mmc_blk_get(bdev->bd_disk);
605 if (!md) {
606 err = -EINVAL;
607 goto cmd_err;
608 }
609
610 card = md->queue.card;
611 if (IS_ERR(card)) {
612 err = PTR_ERR(card);
613 goto cmd_done;
614 }
615
616 mmc_get_card(card);
617
b093410c 618 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
a5f5774c 619
e94cfef6 620 mmc_put_card(card);
cb87ea28 621
b093410c 622 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
a5f5774c 623
cb87ea28
JC		 624cmd_done:
625 mmc_blk_put(md);
1c02f000 626cmd_err:
cb87ea28
JC		 627 kfree(idata->buf);
628 kfree(idata);
b093410c 629 return ioc_err ? ioc_err : err;
cb87ea28
JC		 630}
631
a5f5774c
JH		 632static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
633 struct mmc_ioc_multi_cmd __user *user)
634{
635 struct mmc_blk_ioc_data **idata = NULL;
636 struct mmc_ioc_cmd __user *cmds = user->cmds;
637 struct mmc_card *card;
638 struct mmc_blk_data *md;
b093410c 639 int i, err = 0, ioc_err = 0;
a5f5774c
JH		 640 __u64 num_of_cmds;
641
642 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
643 sizeof(num_of_cmds)))
644 return -EFAULT;
645
646 if (num_of_cmds > MMC_IOC_MAX_CMDS)
647 return -EINVAL;
648
649 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
650 if (!idata)
651 return -ENOMEM;
652
653 for (i = 0; i < num_of_cmds; i++) {
654 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
655 if (IS_ERR(idata[i])) {
656 err = PTR_ERR(idata[i]);
657 num_of_cmds = i;
658 goto cmd_err;
659 }
660 }
661
662 md = mmc_blk_get(bdev->bd_disk);
663 if (!md)
664 goto cmd_err;
665
666 card = md->queue.card;
667 if (IS_ERR(card)) {
668 err = PTR_ERR(card);
669 goto cmd_done;
670 }
671
672 mmc_get_card(card);
673
b093410c
GG		 674 for (i = 0; i < num_of_cmds && !ioc_err; i++)
675 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
a5f5774c
JH		 676
677 mmc_put_card(card);
678
679 /* copy to user if data and response */
b093410c 680 for (i = 0; i < num_of_cmds && !err; i++)
a5f5774c 681 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
a5f5774c
JH		 682
683cmd_done:
684 mmc_blk_put(md);
685cmd_err:
686 for (i = 0; i < num_of_cmds; i++) {
687 kfree(idata[i]->buf);
688 kfree(idata[i]);
689 }
690 kfree(idata);
b093410c 691 return ioc_err ? ioc_err : err;
a5f5774c
JH		 692}
693
cb87ea28
JC		 694static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
695 unsigned int cmd, unsigned long arg)
696{
a5f5774c
JH		 697 /*
698 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
699 * whole block device, not on a partition. This prevents overspray
700 * between sibling partitions.
701 */
702 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
703 return -EPERM;
704
705 switch (cmd) {
706 case MMC_IOC_CMD:
707 return mmc_blk_ioctl_cmd(bdev,
708 (struct mmc_ioc_cmd __user *)arg);
709 case MMC_IOC_MULTI_CMD:
710 return mmc_blk_ioctl_multi_cmd(bdev,
711 (struct mmc_ioc_multi_cmd __user *)arg);
712 default:
713 return -EINVAL;
714 }
cb87ea28
JC		 715}
716
717#ifdef CONFIG_COMPAT
718static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
719 unsigned int cmd, unsigned long arg)
720{
721 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
722}
723#endif
724
83d5cde4 725static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 726 .open = mmc_blk_open,
727 .release = mmc_blk_release,
a885c8c4 728 .getgeo = mmc_blk_getgeo,
1da177e4 729 .owner = THIS_MODULE,
cb87ea28
JC		 730 .ioctl = mmc_blk_ioctl,
731#ifdef CONFIG_COMPAT
732 .compat_ioctl = mmc_blk_compat_ioctl,
733#endif
1da177e4
LT		 734};
735
371a689f
AW		 736static inline int mmc_blk_part_switch(struct mmc_card *card,
737 struct mmc_blk_data *md)
738{
739 int ret;
fc95e30b 740 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 741
371a689f
AW		 742 if (main_md->part_curr == md->part_type)
743 return 0;
744
745 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 746 u8 part_config = card->ext_csd.part_config;
747
748 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
749 part_config |= md->part_type;
371a689f
AW		 750
751 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 752 EXT_CSD_PART_CONFIG, part_config,
371a689f
AW		 753 card->ext_csd.part_time);
754 if (ret)
755 return ret;
0d7d85ca
AH		 756
757 card->ext_csd.part_config = part_config;
67716327 758 }
371a689f
AW		 759
760 main_md->part_curr = md->part_type;
761 return 0;
762}
763
ec5a19dd
PO		 764static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
765{
766 int err;
051913da
BD		 767 u32 result;
768 __be32 *blocks;
ec5a19dd 769
ad5fd972 770 struct mmc_request mrq = {NULL};
1278dba1 771 struct mmc_command cmd = {0};
a61ad2b4 772 struct mmc_data data = {0};
ec5a19dd
PO		 773
774 struct scatterlist sg;
775
ec5a19dd
PO		 776 cmd.opcode = MMC_APP_CMD;
777 cmd.arg = card->rca << 16;
7213d175 778 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 779
780 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 781 if (err)
782 return (u32)-1;
783 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 784 return (u32)-1;
785
786 memset(&cmd, 0, sizeof(struct mmc_command));
787
788 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
789 cmd.arg = 0;
7213d175 790 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 791
ec5a19dd
PO		 792 data.blksz = 4;
793 data.blocks = 1;
794 data.flags = MMC_DATA_READ;
795 data.sg = &sg;
796 data.sg_len = 1;
d380443c 797 mmc_set_data_timeout(&data, card);
ec5a19dd 798
ec5a19dd
PO		 799 mrq.cmd = &cmd;
800 mrq.data = &data;
801
051913da
BD		 802 blocks = kmalloc(4, GFP_KERNEL);
803 if (!blocks)
804 return (u32)-1;
805
806 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 807
808 mmc_wait_for_req(card->host, &mrq);
809
051913da
BD		 810 result = ntohl(*blocks);
811 kfree(blocks);
812
17b0429d 813 if (cmd.error || data.error)
051913da 814 result = (u32)-1;
ec5a19dd 815
051913da 816 return result;
ec5a19dd
PO		 817}
818
0a2d4048 819static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 820{
1278dba1 821 struct mmc_command cmd = {0};
504f191f
AH		 822 int err;
823
504f191f
AH		 824 cmd.opcode = MMC_SEND_STATUS;
825 if (!mmc_host_is_spi(card->host))
826 cmd.arg = card->rca << 16;
827 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 828 err = mmc_wait_for_cmd(card->host, &cmd, retries);
829 if (err == 0)
830 *status = cmd.resp[0];
831 return err;
504f191f
AH		 832}
833
c49433fb 834static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 835 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 836{
837 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
838 int err = 0;
839 u32 status;
840
841 do {
842 err = get_card_status(card, &status, 5);
843 if (err) {
844 pr_err("%s: error %d requesting status\n",
845 req->rq_disk->disk_name, err);
846 return err;
847 }
848
849 if (status & R1_ERROR) {
850 pr_err("%s: %s: error sending status cmd, status %#x\n",
851 req->rq_disk->disk_name, __func__, status);
852 *gen_err = 1;
853 }
854
95a91298
UH		 855 /* We may rely on the host hw to handle busy detection.*/
856 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
857 hw_busy_detect)
858 break;
859
c49433fb
UH		 860 /*
861 * Timeout if the device never becomes ready for data and never
862 * leaves the program state.
863 */
864 if (time_after(jiffies, timeout)) {
865 pr_err("%s: Card stuck in programming state! %s %s\n",
866 mmc_hostname(card->host),
867 req->rq_disk->disk_name, __func__);
868 return -ETIMEDOUT;
869 }
870
871 /*
872 * Some cards mishandle the status bits,
873 * so make sure to check both the busy
874 * indication and the card state.
875 */
876 } while (!(status & R1_READY_FOR_DATA) ||
877 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
878
879 return err;
880}
881
bb5cba40
UH		 882static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
883 struct request *req, int *gen_err, u32 *stop_status)
884{
885 struct mmc_host *host = card->host;
886 struct mmc_command cmd = {0};
887 int err;
888 bool use_r1b_resp = rq_data_dir(req) == WRITE;
889
890 /*
891 * Normally we use R1B responses for WRITE, but in cases where the host
892 * has specified a max_busy_timeout we need to validate it. A failure
893 * means we need to prevent the host from doing hw busy detection, which
894 * is done by converting to a R1 response instead.
895 */
896 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
897 use_r1b_resp = false;
898
899 cmd.opcode = MMC_STOP_TRANSMISSION;
900 if (use_r1b_resp) {
901 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
902 cmd.busy_timeout = timeout_ms;
903 } else {
904 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
905 }
906
907 err = mmc_wait_for_cmd(host, &cmd, 5);
908 if (err)
909 return err;
910
911 *stop_status = cmd.resp[0];
912
913 /* No need to check card status in case of READ. */
914 if (rq_data_dir(req) == READ)
915 return 0;
916
917 if (!mmc_host_is_spi(host) &&
918 (*stop_status & R1_ERROR)) {
919 pr_err("%s: %s: general error sending stop command, resp %#x\n",
920 req->rq_disk->disk_name, __func__, *stop_status);
921 *gen_err = 1;
922 }
923
924 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
925}
926
a8ad82cc 927#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 928#define ERR_RETRY 2
929#define ERR_ABORT 1
930#define ERR_CONTINUE 0
931
932static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
933 bool status_valid, u32 status)
934{
935 switch (error) {
936 case -EILSEQ:
937 /* response crc error, retry the r/w cmd */
938 pr_err("%s: %s sending %s command, card status %#x\n",
939 req->rq_disk->disk_name, "response CRC error",
940 name, status);
941 return ERR_RETRY;
942
943 case -ETIMEDOUT:
944 pr_err("%s: %s sending %s command, card status %#x\n",
945 req->rq_disk->disk_name, "timed out", name, status);
946
947 /* If the status cmd initially failed, retry the r/w cmd */
948 if (!status_valid)
949 return ERR_RETRY;
950
951 /*
952 * If it was a r/w cmd crc error, or illegal command
953 * (eg, issued in wrong state) then retry - we should
954 * have corrected the state problem above.
955 */
956 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
957 return ERR_RETRY;
958
959 /* Otherwise abort the command */
960 return ERR_ABORT;
961
962 default:
963 /* We don't understand the error code the driver gave us */
964 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
965 req->rq_disk->disk_name, error, status);
966 return ERR_ABORT;
967 }
968}
969
970/*
971 * Initial r/w and stop cmd error recovery.
972 * We don't know whether the card received the r/w cmd or not, so try to
973 * restore things back to a sane state. Essentially, we do this as follows:
974 * - Obtain card status. If the first attempt to obtain card status fails,
975 * the status word will reflect the failed status cmd, not the failed
976 * r/w cmd. If we fail to obtain card status, it suggests we can no
977 * longer communicate with the card.
978 * - Check the card state. If the card received the cmd but there was a
979 * transient problem with the response, it might still be in a data transfer
980 * mode. Try to send it a stop command. If this fails, we can't recover.
981 * - If the r/w cmd failed due to a response CRC error, it was probably
982 * transient, so retry the cmd.
983 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
984 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
985 * illegal cmd, retry.
986 * Otherwise we don't understand what happened, so abort.
987 */
988static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 989 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 990{
991 bool prev_cmd_status_valid = true;
992 u32 status, stop_status = 0;
993 int err, retry;
994
a8ad82cc
SRT		 995 if (mmc_card_removed(card))
996 return ERR_NOMEDIUM;
997
a01f3ccf
RKAL		 998 /*
999 * Try to get card status which indicates both the card state
1000 * and why there was no response. If the first attempt fails,
1001 * we can't be sure the returned status is for the r/w command.
1002 */
1003 for (retry = 2; retry >= 0; retry--) {
1004 err = get_card_status(card, &status, 0);
1005 if (!err)
1006 break;
1007
6f398ad2
AH		 1008 /* Re-tune if needed */
1009 mmc_retune_recheck(card->host);
1010
a01f3ccf
RKAL		 1011 prev_cmd_status_valid = false;
1012 pr_err("%s: error %d sending status command, %sing\n",
1013 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1014 }
1015
1016 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 1017 if (err) {
1018 /* Check if the card is removed */
1019 if (mmc_detect_card_removed(card->host))
1020 return ERR_NOMEDIUM;
a01f3ccf 1021 return ERR_ABORT;
a8ad82cc 1022 }
a01f3ccf 1023
67716327
AH		 1024 /* Flag ECC errors */
1025 if ((status & R1_CARD_ECC_FAILED) ||
1026 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1027 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1028 *ecc_err = 1;
1029
c8760069
KY		 1030 /* Flag General errors */
1031 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1032 if ((status & R1_ERROR) ||
1033 (brq->stop.resp[0] & R1_ERROR)) {
1034 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1035 req->rq_disk->disk_name, __func__,
1036 brq->stop.resp[0], status);
1037 *gen_err = 1;
1038 }
1039
a01f3ccf
RKAL		 1040 /*
1041 * Check the current card state. If it is in some data transfer
1042 * mode, tell it to stop (and hopefully transition back to TRAN.)
1043 */
1044 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1045 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 1046 err = send_stop(card,
1047 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1048 req, gen_err, &stop_status);
1049 if (err) {
a01f3ccf
RKAL		 1050 pr_err("%s: error %d sending stop command\n",
1051 req->rq_disk->disk_name, err);
bb5cba40
UH		 1052 /*
1053 * If the stop cmd also timed out, the card is probably
1054 * not present, so abort. Other errors are bad news too.
1055 */
a01f3ccf 1056 return ERR_ABORT;
bb5cba40
UH		 1057 }
1058
67716327
AH		 1059 if (stop_status & R1_CARD_ECC_FAILED)
1060 *ecc_err = 1;
a01f3ccf
RKAL		 1061 }
1062
1063 /* Check for set block count errors */
1064 if (brq->sbc.error)
1065 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1066 prev_cmd_status_valid, status);
1067
1068 /* Check for r/w command errors */
1069 if (brq->cmd.error)
1070 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1071 prev_cmd_status_valid, status);
1072
67716327
AH		 1073 /* Data errors */
1074 if (!brq->stop.error)
1075 return ERR_CONTINUE;
1076
a01f3ccf 1077 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 1078 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 1079 req->rq_disk->disk_name, brq->stop.error,
1080 brq->cmd.resp[0], status);
1081
1082 /*
1083 * Subsitute in our own stop status as this will give the error
1084 * state which happened during the execution of the r/w command.
1085 */
1086 if (stop_status) {
1087 brq->stop.resp[0] = stop_status;
1088 brq->stop.error = 0;
1089 }
1090 return ERR_CONTINUE;
1091}
1092
67716327
AH		 1093static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1094 int type)
1095{
1096 int err;
1097
1098 if (md->reset_done & type)
1099 return -EEXIST;
1100
1101 md->reset_done |= type;
1102 err = mmc_hw_reset(host);
1103 /* Ensure we switch back to the correct partition */
1104 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1105 struct mmc_blk_data *main_md =
1106 dev_get_drvdata(&host->card->dev);
67716327
AH		 1107 int part_err;
1108
1109 main_md->part_curr = main_md->part_type;
1110 part_err = mmc_blk_part_switch(host->card, md);
1111 if (part_err) {
1112 /*
1113 * We have failed to get back into the correct
1114 * partition, so we need to abort the whole request.
1115 */
1116 return -ENODEV;
1117 }
1118 }
1119 return err;
1120}
1121
1122static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1123{
1124 md->reset_done &= ~type;
1125}
1126
4e93b9a6
CD		 1127int mmc_access_rpmb(struct mmc_queue *mq)
1128{
1129 struct mmc_blk_data *md = mq->data;
1130 /*
1131 * If this is a RPMB partition access, return ture
1132 */
1133 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1134 return true;
1135
1136 return false;
1137}
1138
bd788c96
AH		 1139static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1140{
1141 struct mmc_blk_data *md = mq->data;
1142 struct mmc_card *card = md->queue.card;
1143 unsigned int from, nr, arg;
67716327 1144 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1145
bd788c96
AH		 1146 if (!mmc_can_erase(card)) {
1147 err = -EOPNOTSUPP;
1148 goto out;
1149 }
1150
1151 from = blk_rq_pos(req);
1152 nr = blk_rq_sectors(req);
1153
b3bf9153
KP		 1154 if (mmc_can_discard(card))
1155 arg = MMC_DISCARD_ARG;
1156 else if (mmc_can_trim(card))
bd788c96
AH		 1157 arg = MMC_TRIM_ARG;
1158 else
1159 arg = MMC_ERASE_ARG;
67716327 1160retry:
6a7a6b45
AW		 1161 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1162 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1163 INAND_CMD38_ARG_EXT_CSD,
1164 arg == MMC_TRIM_ARG ?
1165 INAND_CMD38_ARG_TRIM :
1166 INAND_CMD38_ARG_ERASE,
1167 0);
1168 if (err)
1169 goto out;
1170 }
bd788c96
AH		 1171 err = mmc_erase(card, from, nr, arg);
1172out:
67716327
AH		 1173 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1174 goto retry;
1175 if (!err)
1176 mmc_blk_reset_success(md, type);
ecf8b5d0 1177 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1178
bd788c96
AH		 1179 return err ? 0 : 1;
1180}
1181
49804548
AH		 1182static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1183 struct request *req)
1184{
1185 struct mmc_blk_data *md = mq->data;
1186 struct mmc_card *card = md->queue.card;
775a9362 1187 unsigned int from, nr, arg;
67716327 1188 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1189
775a9362 1190 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1191 err = -EOPNOTSUPP;
1192 goto out;
1193 }
1194
28302812
AH		 1195 from = blk_rq_pos(req);
1196 nr = blk_rq_sectors(req);
1197
775a9362
ME		 1198 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1199 arg = MMC_SECURE_TRIM1_ARG;
1200 else
1201 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1202
67716327 1203retry:
6a7a6b45
AW		 1204 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1205 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1206 INAND_CMD38_ARG_EXT_CSD,
1207 arg == MMC_SECURE_TRIM1_ARG ?
1208 INAND_CMD38_ARG_SECTRIM1 :
1209 INAND_CMD38_ARG_SECERASE,
1210 0);
1211 if (err)
28302812 1212 goto out_retry;
6a7a6b45 1213 }
28302812 1214
49804548 1215 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1216 if (err == -EIO)
1217 goto out_retry;
1218 if (err)
1219 goto out;
1220
1221 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1222 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1223 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1224 INAND_CMD38_ARG_EXT_CSD,
1225 INAND_CMD38_ARG_SECTRIM2,
1226 0);
1227 if (err)
28302812 1228 goto out_retry;
6a7a6b45 1229 }
28302812 1230
49804548 1231 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1232 if (err == -EIO)
1233 goto out_retry;
1234 if (err)
1235 goto out;
6a7a6b45 1236 }
28302812 1237
28302812
AH		 1238out_retry:
1239 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1240 goto retry;
1241 if (!err)
1242 mmc_blk_reset_success(md, type);
28302812 1243out:
ecf8b5d0 1244 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1245
49804548
AH		 1246 return err ? 0 : 1;
1247}
1248
f4c5522b
AW		 1249static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1250{
1251 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1252 struct mmc_card *card = md->queue.card;
1253 int ret = 0;
1254
1255 ret = mmc_flush_cache(card);
1256 if (ret)
1257 ret = -EIO;
f4c5522b 1258
ecf8b5d0 1259 blk_end_request_all(req, ret);
f4c5522b 1260
881d1c25 1261 return ret ? 0 : 1;
f4c5522b
AW		 1262}
1263
1264/*
1265 * Reformat current write as a reliable write, supporting
1266 * both legacy and the enhanced reliable write MMC cards.
1267 * In each transfer we'll handle only as much as a single
1268 * reliable write can handle, thus finish the request in
1269 * partial completions.
1270 */
d0c97cfb
AW		 1271static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1272 struct mmc_card *card,
1273 struct request *req)
f4c5522b 1274{
f4c5522b
AW		 1275 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1276 /* Legacy mode imposes restrictions on transfers. */
1277 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1278 brq->data.blocks = 1;
1279
1280 if (brq->data.blocks > card->ext_csd.rel_sectors)
1281 brq->data.blocks = card->ext_csd.rel_sectors;
1282 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1283 brq->data.blocks = 1;
1284 }
f4c5522b
AW		 1285}
1286
4c2b8f26
RKAL		 1287#define CMD_ERRORS \
1288 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1289 R1_ADDRESS_ERROR | /* Misaligned address */ \
1290 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1291 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1292 R1_CC_ERROR | /* Card controller error */ \
1293 R1_ERROR) /* General/unknown error */
1294
ee8a43a5
PF		 1295static int mmc_blk_err_check(struct mmc_card *card,
1296 struct mmc_async_req *areq)
d78d4a8a 1297{
ee8a43a5
PF		 1298 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1299 mmc_active);
1300 struct mmc_blk_request *brq = &mq_mrq->brq;
1301 struct request *req = mq_mrq->req;
b8360a49 1302 int need_retune = card->host->need_retune;
c8760069 1303 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1304
1305 /*
1306 * sbc.error indicates a problem with the set block count
1307 * command. No data will have been transferred.
1308 *
1309 * cmd.error indicates a problem with the r/w command. No
1310 * data will have been transferred.
1311 *
1312 * stop.error indicates a problem with the stop command. Data
1313 * may have been transferred, or may still be transferring.
1314 */
67716327
AH		 1315 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1316 brq->data.error) {
c8760069 1317 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1318 case ERR_RETRY:
1319 return MMC_BLK_RETRY;
1320 case ERR_ABORT:
1321 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1322 case ERR_NOMEDIUM:
1323 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1324 case ERR_CONTINUE:
1325 break;
1326 }
1327 }
1328
1329 /*
1330 * Check for errors relating to the execution of the
1331 * initial command - such as address errors. No data
1332 * has been transferred.
1333 */
1334 if (brq->cmd.resp[0] & CMD_ERRORS) {
1335 pr_err("%s: r/w command failed, status = %#x\n",
1336 req->rq_disk->disk_name, brq->cmd.resp[0]);
1337 return MMC_BLK_ABORT;
1338 }
1339
1340 /*
1341 * Everything else is either success, or a data error of some
1342 * kind. If it was a write, we may have transitioned to
1343 * program mode, which we have to wait for it to complete.
1344 */
1345 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1346 int err;
8fee476b 1347
c8760069
KY		 1348 /* Check stop command response */
1349 if (brq->stop.resp[0] & R1_ERROR) {
1350 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1351 req->rq_disk->disk_name, __func__,
1352 brq->stop.resp[0]);
1353 gen_err = 1;
1354 }
1355
95a91298
UH		 1356 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1357 &gen_err);
c49433fb
UH		 1358 if (err)
1359 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1360 }
1361
c8760069
KY		 1362 /* if general error occurs, retry the write operation. */
1363 if (gen_err) {
1364 pr_warn("%s: retrying write for general error\n",
1365 req->rq_disk->disk_name);
1366 return MMC_BLK_RETRY;
1367 }
1368
d78d4a8a 1369 if (brq->data.error) {
b8360a49
AH		 1370 if (need_retune && !brq->retune_retry_done) {
1371 pr_info("%s: retrying because a re-tune was needed\n",
1372 req->rq_disk->disk_name);
1373 brq->retune_retry_done = 1;
1374 return MMC_BLK_RETRY;
1375 }
d78d4a8a
PF		 1376 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1377 req->rq_disk->disk_name, brq->data.error,
1378 (unsigned)blk_rq_pos(req),
1379 (unsigned)blk_rq_sectors(req),
1380 brq->cmd.resp[0], brq->stop.resp[0]);
1381
1382 if (rq_data_dir(req) == READ) {
67716327
AH		 1383 if (ecc_err)
1384 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1385 return MMC_BLK_DATA_ERR;
1386 } else {
1387 return MMC_BLK_CMD_ERR;
1388 }
1389 }
1390
67716327
AH		 1391 if (!brq->data.bytes_xfered)
1392 return MMC_BLK_RETRY;
d78d4a8a 1393
ce39f9d1
SJ		 1394 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1395 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1396 return MMC_BLK_PARTIAL;
1397 else
1398 return MMC_BLK_SUCCESS;
1399 }
1400
67716327
AH		 1401 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1402 return MMC_BLK_PARTIAL;
1403
1404 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1405}
1406
ce39f9d1
SJ		 1407static int mmc_blk_packed_err_check(struct mmc_card *card,
1408 struct mmc_async_req *areq)
1409{
1410 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1411 mmc_active);
1412 struct request *req = mq_rq->req;
1413 struct mmc_packed *packed = mq_rq->packed;
1414 int err, check, status;
1415 u8 *ext_csd;
1416
1417 BUG_ON(!packed);
1418
1419 packed->retries--;
1420 check = mmc_blk_err_check(card, areq);
1421 err = get_card_status(card, &status, 0);
1422 if (err) {
1423 pr_err("%s: error %d sending status command\n",
1424 req->rq_disk->disk_name, err);
1425 return MMC_BLK_ABORT;
1426 }
1427
1428 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1429 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1430 if (err) {
1431 pr_err("%s: error %d sending ext_csd\n",
1432 req->rq_disk->disk_name, err);
86817ffb 1433 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1434 }
1435
1436 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1437 EXT_CSD_PACKED_FAILURE) &&
1438 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1439 EXT_CSD_PACKED_GENERIC_ERROR)) {
1440 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1441 EXT_CSD_PACKED_INDEXED_ERROR) {
1442 packed->idx_failure =
1443 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1444 check = MMC_BLK_PARTIAL;
1445 }
1446 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1447 "failure index: %d\n",
1448 req->rq_disk->disk_name, packed->nr_entries,
1449 packed->blocks, packed->idx_failure);
1450 }
ce39f9d1
SJ		 1451 kfree(ext_csd);
1452 }
1453
1454 return check;
1455}
1456
54d49d77
PF		 1457static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1458 struct mmc_card *card,
1459 int disable_multi,
1460 struct mmc_queue *mq)
1da177e4 1461{
54d49d77
PF		 1462 u32 readcmd, writecmd;
1463 struct mmc_blk_request *brq = &mqrq->brq;
1464 struct request *req = mqrq->req;
1da177e4 1465 struct mmc_blk_data *md = mq->data;
4265900e 1466 bool do_data_tag;
1da177e4 1467
f4c5522b
AW		 1468 /*
1469 * Reliable writes are used to implement Forced Unit Access and
1470 * REQ_META accesses, and are supported only on MMCs.
65299a3b
CH		 1471 *
1472 * XXX: this really needs a good explanation of why REQ_META
1473 * is treated special.
f4c5522b
AW		 1474 */
1475 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1476 (req->cmd_flags & REQ_META)) &&
1477 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1478 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1479
54d49d77
PF		 1480 memset(brq, 0, sizeof(struct mmc_blk_request));
1481 brq->mrq.cmd = &brq->cmd;
1482 brq->mrq.data = &brq->data;
1da177e4 1483
54d49d77
PF		 1484 brq->cmd.arg = blk_rq_pos(req);
1485 if (!mmc_card_blockaddr(card))
1486 brq->cmd.arg <<= 9;
1487 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1488 brq->data.blksz = 512;
1489 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1490 brq->stop.arg = 0;
54d49d77 1491 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1492
54d49d77
PF		 1493 /*
1494 * The block layer doesn't support all sector count
1495 * restrictions, so we need to be prepared for too big
1496 * requests.
1497 */
1498 if (brq->data.blocks > card->host->max_blk_count)
1499 brq->data.blocks = card->host->max_blk_count;
1da177e4 1500
2bf22b39
PW		 1501 if (brq->data.blocks > 1) {
1502 /*
1503 * After a read error, we redo the request one sector
1504 * at a time in order to accurately determine which
1505 * sectors can be read successfully.
1506 */
1507 if (disable_multi)
1508 brq->data.blocks = 1;
1509
2e47e842
KM		 1510 /*
1511 * Some controllers have HW issues while operating
1512 * in multiple I/O mode
1513 */
1514 if (card->host->ops->multi_io_quirk)
1515 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1516 (rq_data_dir(req) == READ) ?
1517 MMC_DATA_READ : MMC_DATA_WRITE,
1518 brq->data.blocks);
2bf22b39 1519 }
d0c97cfb 1520
54d49d77
PF		 1521 if (brq->data.blocks > 1 || do_rel_wr) {
1522 /* SPI multiblock writes terminate using a special
1523 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1524 */
54d49d77
PF		 1525 if (!mmc_host_is_spi(card->host) ||
1526 rq_data_dir(req) == READ)
1527 brq->mrq.stop = &brq->stop;
1528 readcmd = MMC_READ_MULTIPLE_BLOCK;
1529 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1530 } else {
1531 brq->mrq.stop = NULL;
1532 readcmd = MMC_READ_SINGLE_BLOCK;
1533 writecmd = MMC_WRITE_BLOCK;
1534 }
1535 if (rq_data_dir(req) == READ) {
1536 brq->cmd.opcode = readcmd;
1537 brq->data.flags |= MMC_DATA_READ;
bcc3e172
UH		 1538 if (brq->mrq.stop)
1539 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1540 MMC_CMD_AC;
54d49d77
PF		 1541 } else {
1542 brq->cmd.opcode = writecmd;
1543 brq->data.flags |= MMC_DATA_WRITE;
bcc3e172
UH		 1544 if (brq->mrq.stop)
1545 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1546 MMC_CMD_AC;
54d49d77 1547 }
d0c97cfb 1548
54d49d77
PF		 1549 if (do_rel_wr)
1550 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1551
4265900e
SD		 1552 /*
1553 * Data tag is used only during writing meta data to speed
1554 * up write and any subsequent read of this meta data
1555 */
1556 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1557 (req->cmd_flags & REQ_META) &&
1558 (rq_data_dir(req) == WRITE) &&
1559 ((brq->data.blocks * brq->data.blksz) >=
1560 card->ext_csd.data_tag_unit_size);
1561
54d49d77
PF		 1562 /*
1563 * Pre-defined multi-block transfers are preferable to
1564 * open ended-ones (and necessary for reliable writes).
1565 * However, it is not sufficient to just send CMD23,
1566 * and avoid the final CMD12, as on an error condition
1567 * CMD12 (stop) needs to be sent anyway. This, coupled
1568 * with Auto-CMD23 enhancements provided by some
1569 * hosts, means that the complexity of dealing
1570 * with this is best left to the host. If CMD23 is
1571 * supported by card and host, we'll fill sbc in and let
1572 * the host deal with handling it correctly. This means
1573 * that for hosts that don't expose MMC_CAP_CMD23, no
1574 * change of behavior will be observed.
1575 *
1576 * N.B: Some MMC cards experience perf degradation.
1577 * We'll avoid using CMD23-bounded multiblock writes for
1578 * these, while retaining features like reliable writes.
1579 */
4265900e
SD		 1580 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1581 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1582 do_data_tag)) {
54d49d77
PF		 1583 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1584 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1585 (do_rel_wr ? (1 << 31) : 0) |
1586 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1587 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1588 brq->mrq.sbc = &brq->sbc;
1589 }
98ccf149 1590
54d49d77
PF		 1591 mmc_set_data_timeout(&brq->data, card);
1592
1593 brq->data.sg = mqrq->sg;
1594 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1595
1596 /*
1597 * Adjust the sg list so it is the same size as the
1598 * request.
1599 */
1600 if (brq->data.blocks != blk_rq_sectors(req)) {
1601 int i, data_size = brq->data.blocks << 9;
1602 struct scatterlist *sg;
1603
1604 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1605 data_size -= sg->length;
1606 if (data_size <= 0) {
1607 sg->length += data_size;
1608 i++;
1609 break;
6a79e391 1610 }
6a79e391 1611 }
54d49d77
PF		 1612 brq->data.sg_len = i;
1613 }
1614
ee8a43a5
PF		 1615 mqrq->mmc_active.mrq = &brq->mrq;
1616 mqrq->mmc_active.err_check = mmc_blk_err_check;
1617
54d49d77
PF		 1618 mmc_queue_bounce_pre(mqrq);
1619}
6a79e391 1620
ce39f9d1
SJ		 1621static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1622 struct mmc_card *card)
1623{
1624 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1625 unsigned int max_seg_sz = queue_max_segment_size(q);
1626 unsigned int len, nr_segs = 0;
1627
1628 do {
1629 len = min(hdr_sz, max_seg_sz);
1630 hdr_sz -= len;
1631 nr_segs++;
1632 } while (hdr_sz);
1633
1634 return nr_segs;
1635}
1636
1637static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1638{
1639 struct request_queue *q = mq->queue;
1640 struct mmc_card *card = mq->card;
1641 struct request *cur = req, *next = NULL;
1642 struct mmc_blk_data *md = mq->data;
1643 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1644 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1645 unsigned int req_sectors = 0, phys_segments = 0;
1646 unsigned int max_blk_count, max_phys_segs;
1647 bool put_back = true;
1648 u8 max_packed_rw = 0;
1649 u8 reqs = 0;
1650
1651 if (!(md->flags & MMC_BLK_PACKED_CMD))
1652 goto no_packed;
1653
1654 if ((rq_data_dir(cur) == WRITE) &&
1655 mmc_host_packed_wr(card->host))
1656 max_packed_rw = card->ext_csd.max_packed_writes;
1657
1658 if (max_packed_rw == 0)
1659 goto no_packed;
1660
1661 if (mmc_req_rel_wr(cur) &&
1662 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1663 goto no_packed;
1664
1665 if (mmc_large_sector(card) &&
1666 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1667 goto no_packed;
1668
1669 mmc_blk_clear_packed(mqrq);
1670
1671 max_blk_count = min(card->host->max_blk_count,
1672 card->host->max_req_size >> 9);
1673 if (unlikely(max_blk_count > 0xffff))
1674 max_blk_count = 0xffff;
1675
1676 max_phys_segs = queue_max_segments(q);
1677 req_sectors += blk_rq_sectors(cur);
1678 phys_segments += cur->nr_phys_segments;
1679
1680 if (rq_data_dir(cur) == WRITE) {
1681 req_sectors += mmc_large_sector(card) ? 8 : 1;
1682 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1683 }
1684
1685 do {
1686 if (reqs >= max_packed_rw - 1) {
1687 put_back = false;
1688 break;
1689 }
1690
1691 spin_lock_irq(q->queue_lock);
1692 next = blk_fetch_request(q);
1693 spin_unlock_irq(q->queue_lock);
1694 if (!next) {
1695 put_back = false;
1696 break;
1697 }
1698
1699 if (mmc_large_sector(card) &&
1700 !IS_ALIGNED(blk_rq_sectors(next), 8))
1701 break;
1702
1703 if (next->cmd_flags & REQ_DISCARD ||
1704 next->cmd_flags & REQ_FLUSH)
1705 break;
1706
1707 if (rq_data_dir(cur) != rq_data_dir(next))
1708 break;
1709
1710 if (mmc_req_rel_wr(next) &&
1711 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1712 break;
1713
1714 req_sectors += blk_rq_sectors(next);
1715 if (req_sectors > max_blk_count)
1716 break;
1717
1718 phys_segments += next->nr_phys_segments;
1719 if (phys_segments > max_phys_segs)
1720 break;
1721
1722 list_add_tail(&next->queuelist, &mqrq->packed->list);
1723 cur = next;
1724 reqs++;
1725 } while (1);
1726
1727 if (put_back) {
1728 spin_lock_irq(q->queue_lock);
1729 blk_requeue_request(q, next);
1730 spin_unlock_irq(q->queue_lock);
1731 }
1732
1733 if (reqs > 0) {
1734 list_add(&req->queuelist, &mqrq->packed->list);
1735 mqrq->packed->nr_entries = ++reqs;
1736 mqrq->packed->retries = reqs;
1737 return reqs;
1738 }
1739
1740no_packed:
1741 mqrq->cmd_type = MMC_PACKED_NONE;
1742 return 0;
1743}
1744
1745static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1746 struct mmc_card *card,
1747 struct mmc_queue *mq)
1748{
1749 struct mmc_blk_request *brq = &mqrq->brq;
1750 struct request *req = mqrq->req;
1751 struct request *prq;
1752 struct mmc_blk_data *md = mq->data;
1753 struct mmc_packed *packed = mqrq->packed;
1754 bool do_rel_wr, do_data_tag;
1755 u32 *packed_cmd_hdr;
1756 u8 hdr_blocks;
1757 u8 i = 1;
1758
1759 BUG_ON(!packed);
1760
1761 mqrq->cmd_type = MMC_PACKED_WRITE;
1762 packed->blocks = 0;
1763 packed->idx_failure = MMC_PACKED_NR_IDX;
1764
1765 packed_cmd_hdr = packed->cmd_hdr;
1766 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1767 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1768 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1769 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1770
1771 /*
1772 * Argument for each entry of packed group
1773 */
1774 list_for_each_entry(prq, &packed->list, queuelist) {
1775 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1776 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1777 (prq->cmd_flags & REQ_META) &&
1778 (rq_data_dir(prq) == WRITE) &&
1779 ((brq->data.blocks * brq->data.blksz) >=
1780 card->ext_csd.data_tag_unit_size);
1781 /* Argument of CMD23 */
1782 packed_cmd_hdr[(i * 2)] =
1783 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1784 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1785 blk_rq_sectors(prq);
1786 /* Argument of CMD18 or CMD25 */
1787 packed_cmd_hdr[((i * 2)) + 1] =
1788 mmc_card_blockaddr(card) ?
1789 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1790 packed->blocks += blk_rq_sectors(prq);
1791 i++;
1792 }
1793
1794 memset(brq, 0, sizeof(struct mmc_blk_request));
1795 brq->mrq.cmd = &brq->cmd;
1796 brq->mrq.data = &brq->data;
1797 brq->mrq.sbc = &brq->sbc;
1798 brq->mrq.stop = &brq->stop;
1799
1800 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1801 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1802 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1803
1804 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1805 brq->cmd.arg = blk_rq_pos(req);
1806 if (!mmc_card_blockaddr(card))
1807 brq->cmd.arg <<= 9;
1808 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1809
1810 brq->data.blksz = 512;
1811 brq->data.blocks = packed->blocks + hdr_blocks;
1812 brq->data.flags |= MMC_DATA_WRITE;
1813
1814 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1815 brq->stop.arg = 0;
1816 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1817
1818 mmc_set_data_timeout(&brq->data, card);
1819
1820 brq->data.sg = mqrq->sg;
1821 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1822
1823 mqrq->mmc_active.mrq = &brq->mrq;
1824 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1825
1826 mmc_queue_bounce_pre(mqrq);
1827}
1828
67716327
AH		 1829static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1830 struct mmc_blk_request *brq, struct request *req,
1831 int ret)
1832{
ce39f9d1
SJ		 1833 struct mmc_queue_req *mq_rq;
1834 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1835
67716327
AH		 1836 /*
1837 * If this is an SD card and we're writing, we can first
1838 * mark the known good sectors as ok.
1839 *
1840 * If the card is not SD, we can still ok written sectors
1841 * as reported by the controller (which might be less than
1842 * the real number of written sectors, but never more).
1843 */
1844 if (mmc_card_sd(card)) {
1845 u32 blocks;
1846
1847 blocks = mmc_sd_num_wr_blocks(card);
1848 if (blocks != (u32)-1) {
ecf8b5d0 1849 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1850 }
1851 } else {
ce39f9d1
SJ		 1852 if (!mmc_packed_cmd(mq_rq->cmd_type))
1853 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1854 }
1855 return ret;
1856}
1857
ce39f9d1
SJ		 1858static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1859{
1860 struct request *prq;
1861 struct mmc_packed *packed = mq_rq->packed;
1862 int idx = packed->idx_failure, i = 0;
1863 int ret = 0;
1864
1865 BUG_ON(!packed);
1866
1867 while (!list_empty(&packed->list)) {
1868 prq = list_entry_rq(packed->list.next);
1869 if (idx == i) {
1870 /* retry from error index */
1871 packed->nr_entries -= idx;
1872 mq_rq->req = prq;
1873 ret = 1;
1874
1875 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1876 list_del_init(&prq->queuelist);
1877 mmc_blk_clear_packed(mq_rq);
1878 }
1879 return ret;
1880 }
1881 list_del_init(&prq->queuelist);
1882 blk_end_request(prq, 0, blk_rq_bytes(prq));
1883 i++;
1884 }
1885
1886 mmc_blk_clear_packed(mq_rq);
1887 return ret;
1888}
1889
1890static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1891{
1892 struct request *prq;
1893 struct mmc_packed *packed = mq_rq->packed;
1894
1895 BUG_ON(!packed);
1896
1897 while (!list_empty(&packed->list)) {
1898 prq = list_entry_rq(packed->list.next);
1899 list_del_init(&prq->queuelist);
1900 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1901 }
1902
1903 mmc_blk_clear_packed(mq_rq);
1904}
1905
1906static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1907 struct mmc_queue_req *mq_rq)
1908{
1909 struct request *prq;
1910 struct request_queue *q = mq->queue;
1911 struct mmc_packed *packed = mq_rq->packed;
1912
1913 BUG_ON(!packed);
1914
1915 while (!list_empty(&packed->list)) {
1916 prq = list_entry_rq(packed->list.prev);
1917 if (prq->queuelist.prev != &packed->list) {
1918 list_del_init(&prq->queuelist);
1919 spin_lock_irq(q->queue_lock);
1920 blk_requeue_request(mq->queue, prq);
1921 spin_unlock_irq(q->queue_lock);
1922 } else {
1923 list_del_init(&prq->queuelist);
1924 }
1925 }
1926
1927 mmc_blk_clear_packed(mq_rq);
1928}
1929
ee8a43a5 1930static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1931{
1932 struct mmc_blk_data *md = mq->data;
1933 struct mmc_card *card = md->queue.card;
1934 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
b8360a49 1935 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
d78d4a8a 1936 enum mmc_blk_status status;
ee8a43a5 1937 struct mmc_queue_req *mq_rq;
a5075eb9 1938 struct request *req = rqc;
ee8a43a5 1939 struct mmc_async_req *areq;
ce39f9d1
SJ		 1940 const u8 packed_nr = 2;
1941 u8 reqs = 0;
1da177e4 1942
ee8a43a5
PF		 1943 if (!rqc && !mq->mqrq_prev->req)
1944 return 0;
98ccf149 1945
ce39f9d1
SJ		 1946 if (rqc)
1947 reqs = mmc_blk_prep_packed_list(mq, rqc);
1948
ee8a43a5
PF		 1949 do {
1950 if (rqc) {
a5075eb9
SD		 1951 /*
1952 * When 4KB native sector is enabled, only 8 blocks
1953 * multiple read or write is allowed
1954 */
1955 if ((brq->data.blocks & 0x07) &&
1956 (card->ext_csd.data_sector_size == 4096)) {
1957 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1958 req->rq_disk->disk_name);
ce39f9d1 1959 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1960 goto cmd_abort;
1961 }
ce39f9d1
SJ		 1962
1963 if (reqs >= packed_nr)
1964 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1965 card, mq);
1966 else
1967 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1968 areq = &mq->mqrq_cur->mmc_active;
1969 } else
1970 areq = NULL;
1971 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1972 if (!areq) {
1973 if (status == MMC_BLK_NEW_REQUEST)
1974 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1975 return 0;
2220eedf 1976 }
ee8a43a5
PF		 1977
1978 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1979 brq = &mq_rq->brq;
1980 req = mq_rq->req;
67716327 1981 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1982 mmc_queue_bounce_post(mq_rq);
98ccf149 1983
d78d4a8a
PF		 1984 switch (status) {
1985 case MMC_BLK_SUCCESS:
1986 case MMC_BLK_PARTIAL:
1987 /*
1988 * A block was successfully transferred.
1989 */
67716327 1990 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1991
1992 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1993 ret = mmc_blk_end_packed_req(mq_rq);
1994 break;
1995 } else {
1996 ret = blk_end_request(req, 0,
d78d4a8a 1997 brq->data.bytes_xfered);
ce39f9d1
SJ		 1998 }
1999
67716327
AH		 2000 /*
2001 * If the blk_end_request function returns non-zero even
2002 * though all data has been transferred and no errors
2003 * were returned by the host controller, it's a bug.
2004 */
ee8a43a5 2005 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 2006 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 2007 __func__, blk_rq_bytes(req),
2008 brq->data.bytes_xfered);
2009 rqc = NULL;
2010 goto cmd_abort;
2011 }
d78d4a8a
PF		 2012 break;
2013 case MMC_BLK_CMD_ERR:
67716327 2014 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
29535f7b
DW		 2015 if (mmc_blk_reset(md, card->host, type))
2016 goto cmd_abort;
2017 if (!ret)
2018 goto start_new_req;
2019 break;
d78d4a8a 2020 case MMC_BLK_RETRY:
b8360a49 2021 retune_retry_done = brq->retune_retry_done;
d78d4a8a 2022 if (retry++ < 5)
a01f3ccf 2023 break;
67716327 2024 /* Fall through */
d78d4a8a 2025 case MMC_BLK_ABORT:
67716327
AH		 2026 if (!mmc_blk_reset(md, card->host, type))
2027 break;
4c2b8f26 2028 goto cmd_abort;
67716327
AH		 2029 case MMC_BLK_DATA_ERR: {
2030 int err;
2031
2032 err = mmc_blk_reset(md, card->host, type);
2033 if (!err)
2034 break;
ce39f9d1
SJ		 2035 if (err == -ENODEV ||
2036 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 2037 goto cmd_abort;
2038 /* Fall through */
2039 }
2040 case MMC_BLK_ECC_ERR:
2041 if (brq->data.blocks > 1) {
2042 /* Redo read one sector at a time */
6606110d
JP		 2043 pr_warn("%s: retrying using single block read\n",
2044 req->rq_disk->disk_name);
67716327
AH		 2045 disable_multi = 1;
2046 break;
2047 }
d78d4a8a
PF		 2048 /*
2049 * After an error, we redo I/O one sector at a
2050 * time, so we only reach here after trying to
2051 * read a single sector.
2052 */
ecf8b5d0 2053 ret = blk_end_request(req, -EIO,
d78d4a8a 2054 brq->data.blksz);
ee8a43a5
PF		 2055 if (!ret)
2056 goto start_new_req;
d78d4a8a 2057 break;
a8ad82cc
SRT		 2058 case MMC_BLK_NOMEDIUM:
2059 goto cmd_abort;
2220eedf
KD		 2060 default:
2061 pr_err("%s: Unhandled return value (%d)",
2062 req->rq_disk->disk_name, status);
2063 goto cmd_abort;
4c2b8f26
RKAL		 2064 }
2065
ee8a43a5 2066 if (ret) {
ce39f9d1
SJ		 2067 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2068 if (!mq_rq->packed->retries)
2069 goto cmd_abort;
2070 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2071 mmc_start_req(card->host,
2072 &mq_rq->mmc_active, NULL);
2073 } else {
2074
2075 /*
2076 * In case of a incomplete request
2077 * prepare it again and resend.
2078 */
2079 mmc_blk_rw_rq_prep(mq_rq, card,
2080 disable_multi, mq);
2081 mmc_start_req(card->host,
2082 &mq_rq->mmc_active, NULL);
2083 }
b8360a49 2084 mq_rq->brq.retune_retry_done = retune_retry_done;
ee8a43a5 2085 }
1da177e4
LT		 2086 } while (ret);
2087
1da177e4
LT		 2088 return 1;
2089
a01f3ccf 2090 cmd_abort:
ce39f9d1
SJ		 2091 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2092 mmc_blk_abort_packed_req(mq_rq);
2093 } else {
2094 if (mmc_card_removed(card))
2095 req->cmd_flags |= REQ_QUIET;
2096 while (ret)
2097 ret = blk_end_request(req, -EIO,
2098 blk_rq_cur_bytes(req));
2099 }
1da177e4 2100
ee8a43a5
PF		 2101 start_new_req:
2102 if (rqc) {
7a81902f
SJ		 2103 if (mmc_card_removed(card)) {
2104 rqc->cmd_flags |= REQ_QUIET;
2105 blk_end_request_all(rqc, -EIO);
2106 } else {
ce39f9d1
SJ		 2107 /*
2108 * If current request is packed, it needs to put back.
2109 */
2110 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2111 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2112
7a81902f
SJ		 2113 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2114 mmc_start_req(card->host,
2115 &mq->mqrq_cur->mmc_active, NULL);
2116 }
ee8a43a5
PF		 2117 }
2118
1da177e4
LT		 2119 return 0;
2120}
2121
bd788c96
AH		 2122static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2123{
1a258db6
AW		 2124 int ret;
2125 struct mmc_blk_data *md = mq->data;
2126 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2127 struct mmc_host *host = card->host;
2128 unsigned long flags;
f662ae48 2129 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2130
ee8a43a5
PF		 2131 if (req && !mq->mqrq_prev->req)
2132 /* claim host only for the first request */
e94cfef6 2133 mmc_get_card(card);
ee8a43a5 2134
371a689f
AW		 2135 ret = mmc_blk_part_switch(card, md);
2136 if (ret) {
0d7d85ca 2137 if (req) {
ecf8b5d0 2138 blk_end_request_all(req, -EIO);
0d7d85ca 2139 }
371a689f
AW		 2140 ret = 0;
2141 goto out;
2142 }
1a258db6 2143
2220eedf 2144 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2145 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2146 /* complete ongoing async transfer before issuing discard */
2147 if (card->host->areq)
2148 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2149 if (req->cmd_flags & REQ_SECURE)
1a258db6 2150 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2151 else
1a258db6 2152 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2153 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2154 /* complete ongoing async transfer before issuing flush */
2155 if (card->host->areq)
2156 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2157 ret = mmc_blk_issue_flush(mq, req);
49804548 2158 } else {
2220eedf
KD		 2159 if (!req && host->areq) {
2160 spin_lock_irqsave(&host->context_info.lock, flags);
2161 host->context_info.is_waiting_last_req = true;
2162 spin_unlock_irqrestore(&host->context_info.lock, flags);
2163 }
1a258db6 2164 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2165 }
1a258db6 2166
371a689f 2167out:
ef3a69c7 2168 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2169 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2170 /*
2171 * Release host when there are no more requests
2172 * and after special request(discard, flush) is done.
2173 * In case sepecial request, there is no reentry to
2174 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2175 */
e94cfef6 2176 mmc_put_card(card);
1a258db6 2177 return ret;
bd788c96 2178}
1da177e4 2179
a6f6c96b
RK		 2180static inline int mmc_blk_readonly(struct mmc_card *card)
2181{
2182 return mmc_card_readonly(card) ||
2183 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2184}
2185
371a689f
AW		 2186static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2187 struct device *parent,
2188 sector_t size,
2189 bool default_ro,
add710ea
JR		 2190 const char *subname,
2191 int area_type)
1da177e4
LT		 2192{
2193 struct mmc_blk_data *md;
2194 int devidx, ret;
2195
5e71b7a6
OJ		 2196 devidx = find_first_zero_bit(dev_use, max_devices);
2197 if (devidx >= max_devices)
1da177e4
LT		 2198 return ERR_PTR(-ENOSPC);
2199 __set_bit(devidx, dev_use);
2200
dd00cc48 2201 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2202 if (!md) {
2203 ret = -ENOMEM;
2204 goto out;
2205 }
1da177e4 2206
f06c9153
AW		 2207 /*
2208 * !subname implies we are creating main mmc_blk_data that will be
fc95e30b 2209 * associated with mmc_card with dev_set_drvdata. Due to device
f06c9153
AW		 2210 * partitions, devidx will not coincide with a per-physical card
2211 * index anymore so we keep track of a name index.
2212 */
2213 if (!subname) {
2214 md->name_idx = find_first_zero_bit(name_use, max_devices);
2215 __set_bit(md->name_idx, name_use);
add710ea 2216 } else
f06c9153
AW		 2217 md->name_idx = ((struct mmc_blk_data *)
2218 dev_to_disk(parent)->private_data)->name_idx;
2219
add710ea
JR		 2220 md->area_type = area_type;
2221
a6f6c96b
RK		 2222 /*
2223 * Set the read-only status based on the supported commands
2224 * and the write protect switch.
2225 */
2226 md->read_only = mmc_blk_readonly(card);
1da177e4 2227
5e71b7a6 2228 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2229 if (md->disk == NULL) {
2230 ret = -ENOMEM;
2231 goto err_kfree;
2232 }
1da177e4 2233
a6f6c96b 2234 spin_lock_init(&md->lock);
371a689f 2235 INIT_LIST_HEAD(&md->part);
a6f6c96b 2236 md->usage = 1;
1da177e4 2237
d09408ad 2238 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2239 if (ret)
2240 goto err_putdisk;
1da177e4 2241
a6f6c96b
RK		 2242 md->queue.issue_fn = mmc_blk_issue_rq;
2243 md->queue.data = md;
d2b18394 2244
fe6b4c88 2245 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2246 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2247 md->disk->fops = &mmc_bdops;
2248 md->disk->private_data = md;
2249 md->disk->queue = md->queue.queue;
371a689f
AW		 2250 md->disk->driverfs_dev = parent;
2251 set_disk_ro(md->disk, md->read_only || default_ro);
f5b4d71f 2252 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2253 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2254
2255 /*
2256 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2257 *
2258 * - be set for removable media with permanent block devices
2259 * - be unset for removable block devices with permanent media
2260 *
2261 * Since MMC block devices clearly fall under the second
2262 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2263 * should use the block device creation/destruction hotplug
2264 * messages to tell when the card is present.
2265 */
2266
f06c9153 2267 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
fe821915 2268 "mmcblk%u%s", md->name_idx, subname ? subname : "");
a6f6c96b 2269
a5075eb9
SD		 2270 if (mmc_card_mmc(card))
2271 blk_queue_logical_block_size(md->queue.queue,
2272 card->ext_csd.data_sector_size);
2273 else
2274 blk_queue_logical_block_size(md->queue.queue, 512);
2275
371a689f 2276 set_capacity(md->disk, size);
d0c97cfb 2277
f0d89972
AW		 2278 if (mmc_host_cmd23(card->host)) {
2279 if (mmc_card_mmc(card) ||
2280 (mmc_card_sd(card) &&
2281 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2282 md->flags |= MMC_BLK_CMD23;
2283 }
d0c97cfb
AW		 2284
2285 if (mmc_card_mmc(card) &&
2286 md->flags & MMC_BLK_CMD23 &&
2287 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2288 card->ext_csd.rel_sectors)) {
2289 md->flags |= MMC_BLK_REL_WR;
2290 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2291 }
2292
ce39f9d1
SJ		 2293 if (mmc_card_mmc(card) &&
2294 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2295 (md->flags & MMC_BLK_CMD23) &&
2296 card->ext_csd.packed_event_en) {
2297 if (!mmc_packed_init(&md->queue, card))
2298 md->flags |= MMC_BLK_PACKED_CMD;
2299 }
2300
371a689f
AW		 2301 return md;
2302
2303 err_putdisk:
2304 put_disk(md->disk);
2305 err_kfree:
2306 kfree(md);
2307 out:
2308 return ERR_PTR(ret);
2309}
2310
2311static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2312{
2313 sector_t size;
a6f6c96b 2314
85a18ad9
PO		 2315 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2316 /*
2317 * The EXT_CSD sector count is in number or 512 byte
2318 * sectors.
2319 */
371a689f 2320 size = card->ext_csd.sectors;
85a18ad9
PO		 2321 } else {
2322 /*
2323 * The CSD capacity field is in units of read_blkbits.
2324 * set_capacity takes units of 512 bytes.
2325 */
087de9ed
KM		 2326 size = (typeof(sector_t))card->csd.capacity
2327 << (card->csd.read_blkbits - 9);
85a18ad9 2328 }
371a689f 2329
7a30f2af 2330 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2331 MMC_BLK_DATA_AREA_MAIN);
371a689f 2332}
a6f6c96b 2333
371a689f
AW		 2334static int mmc_blk_alloc_part(struct mmc_card *card,
2335 struct mmc_blk_data *md,
2336 unsigned int part_type,
2337 sector_t size,
2338 bool default_ro,
add710ea
JR		 2339 const char *subname,
2340 int area_type)
371a689f
AW		 2341{
2342 char cap_str[10];
2343 struct mmc_blk_data *part_md;
2344
2345 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2346 subname, area_type);
371a689f
AW		 2347 if (IS_ERR(part_md))
2348 return PTR_ERR(part_md);
2349 part_md->part_type = part_type;
2350 list_add(&part_md->part, &md->part);
2351
b9f28d86 2352 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2353 cap_str, sizeof(cap_str));
a3c76eb9 2354 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2355 part_md->disk->disk_name, mmc_card_id(card),
2356 mmc_card_name(card), part_md->part_type, cap_str);
2357 return 0;
2358}
2359
e0c368d5
NJ		 2360/* MMC Physical partitions consist of two boot partitions and
2361 * up to four general purpose partitions.
2362 * For each partition enabled in EXT_CSD a block device will be allocatedi
2363 * to provide access to the partition.
2364 */
2365
371a689f
AW		 2366static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2367{
e0c368d5 2368 int idx, ret = 0;
371a689f
AW		 2369
2370 if (!mmc_card_mmc(card))
2371 return 0;
2372
e0c368d5
NJ		 2373 for (idx = 0; idx < card->nr_parts; idx++) {
2374 if (card->part[idx].size) {
2375 ret = mmc_blk_alloc_part(card, md,
2376 card->part[idx].part_cfg,
2377 card->part[idx].size >> 9,
2378 card->part[idx].force_ro,
add710ea
JR		 2379 card->part[idx].name,
2380 card->part[idx].area_type);
e0c368d5
NJ		 2381 if (ret)
2382 return ret;
2383 }
371a689f
AW		 2384 }
2385
2386 return ret;
1da177e4
LT		 2387}
2388
371a689f
AW		 2389static void mmc_blk_remove_req(struct mmc_blk_data *md)
2390{
add710ea
JR		 2391 struct mmc_card *card;
2392
371a689f 2393 if (md) {
fdfa20c1
PT		 2394 /*
2395 * Flush remaining requests and free queues. It
2396 * is freeing the queue that stops new requests
2397 * from being accepted.
2398 */
8efb83a2 2399 card = md->queue.card;
fdfa20c1
PT		 2400 mmc_cleanup_queue(&md->queue);
2401 if (md->flags & MMC_BLK_PACKED_CMD)
2402 mmc_packed_clean(&md->queue);
371a689f
AW		 2403 if (md->disk->flags & GENHD_FL_UP) {
2404 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2405 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2406 card->ext_csd.boot_ro_lockable)
2407 device_remove_file(disk_to_dev(md->disk),
2408 &md->power_ro_lock);
371a689f 2409
371a689f
AW		 2410 del_gendisk(md->disk);
2411 }
371a689f
AW		 2412 mmc_blk_put(md);
2413 }
2414}
2415
2416static void mmc_blk_remove_parts(struct mmc_card *card,
2417 struct mmc_blk_data *md)
2418{
2419 struct list_head *pos, *q;
2420 struct mmc_blk_data *part_md;
2421
f06c9153 2422 __clear_bit(md->name_idx, name_use);
371a689f
AW		 2423 list_for_each_safe(pos, q, &md->part) {
2424 part_md = list_entry(pos, struct mmc_blk_data, part);
2425 list_del(pos);
2426 mmc_blk_remove_req(part_md);
2427 }
2428}
2429
2430static int mmc_add_disk(struct mmc_blk_data *md)
2431{
2432 int ret;
add710ea 2433 struct mmc_card *card = md->queue.card;
371a689f
AW		 2434
2435 add_disk(md->disk);
2436 md->force_ro.show = force_ro_show;
2437 md->force_ro.store = force_ro_store;
641c3187 2438 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2439 md->force_ro.attr.name = "force_ro";
2440 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2441 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2442 if (ret)
add710ea
JR		 2443 goto force_ro_fail;
2444
2445 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2446 card->ext_csd.boot_ro_lockable) {
88187398 2447 umode_t mode;
add710ea
JR		 2448
2449 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2450 mode = S_IRUGO;
2451 else
2452 mode = S_IRUGO | S_IWUSR;
2453
2454 md->power_ro_lock.show = power_ro_lock_show;
2455 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2456 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2457 md->power_ro_lock.attr.mode = mode;
2458 md->power_ro_lock.attr.name =
2459 "ro_lock_until_next_power_on";
2460 ret = device_create_file(disk_to_dev(md->disk),
2461 &md->power_ro_lock);
2462 if (ret)
2463 goto power_ro_lock_fail;
2464 }
2465 return ret;
2466
2467power_ro_lock_fail:
2468 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2469force_ro_fail:
2470 del_gendisk(md->disk);
371a689f
AW		 2471
2472 return ret;
2473}
2474
c59d4473
CB		 2475#define CID_MANFID_SANDISK 0x2
2476#define CID_MANFID_TOSHIBA 0x11
2477#define CID_MANFID_MICRON 0x13
3550ccdb 2478#define CID_MANFID_SAMSUNG 0x15
b5b4ff0a 2479#define CID_MANFID_KINGSTON 0x70
c59d4473 2480
6f60c222
AW		 2481static const struct mmc_fixup blk_fixups[] =
2482{
c59d4473
CB		 2483 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2484 MMC_QUIRK_INAND_CMD38),
2485 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2486 MMC_QUIRK_INAND_CMD38),
2487 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488 MMC_QUIRK_INAND_CMD38),
2489 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490 MMC_QUIRK_INAND_CMD38),
2491 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2492 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2493
2494 /*
2495 * Some MMC cards experience performance degradation with CMD23
2496 * instead of CMD12-bounded multiblock transfers. For now we'll
2497 * black list what's bad...
2498 * - Certain Toshiba cards.
2499 *
2500 * N.B. This doesn't affect SD cards.
2501 */
7d70d476
YL		 2502 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2503 MMC_QUIRK_BLK_NO_CMD23),
2504 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2505 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2506 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2507 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2508 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2509 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2510 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2511 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2512
2513 /*
2514 * Some Micron MMC cards needs longer data read timeout than
2515 * indicated in CSD.
2516 */
c59d4473 2517 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2518 MMC_QUIRK_LONG_READ_TIME),
2519
3550ccdb
IC		 2520 /*
2521 * On these Samsung MoviNAND parts, performing secure erase or
2522 * secure trim can result in unrecoverable corruption due to a
2523 * firmware bug.
2524 */
2525 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2526 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2527 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2529 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2531 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2532 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2533 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2534 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2535 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2536 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2537 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2538 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2539 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2540 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2541
b5b4ff0a
SL		 2542 /*
2543 * On Some Kingston eMMCs, performing trim can result in
2544 * unrecoverable data conrruption occasionally due to a firmware bug.
2545 */
2546 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2547 MMC_QUIRK_TRIM_BROKEN),
2548 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2549 MMC_QUIRK_TRIM_BROKEN),
2550
6f60c222
AW		 2551 END_FIXUP
2552};
2553
96541bac 2554static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2555{
371a689f 2556 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2557 char cap_str[10];
2558
912490db
PO		 2559 /*
2560 * Check that the card supports the command class(es) we need.
2561 */
2562 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2563 return -ENODEV;
2564
5204d00f
LC		 2565 mmc_fixup_device(card, blk_fixups);
2566
1da177e4
LT		 2567 md = mmc_blk_alloc(card);
2568 if (IS_ERR(md))
2569 return PTR_ERR(md);
2570
b9f28d86 2571 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2572 cap_str, sizeof(cap_str));
a3c76eb9 2573 pr_info("%s: %s %s %s %s\n",
1da177e4 2574 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2575 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2576
371a689f
AW		 2577 if (mmc_blk_alloc_parts(card, md))
2578 goto out;
2579
96541bac 2580 dev_set_drvdata(&card->dev, md);
6f60c222 2581
371a689f
AW		 2582 if (mmc_add_disk(md))
2583 goto out;
2584
2585 list_for_each_entry(part_md, &md->part, part) {
2586 if (mmc_add_disk(part_md))
2587 goto out;
2588 }
e94cfef6
UH		 2589
2590 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2591 pm_runtime_use_autosuspend(&card->dev);
2592
2593 /*
2594 * Don't enable runtime PM for SD-combo cards here. Leave that
2595 * decision to be taken during the SDIO init sequence instead.
2596 */
2597 if (card->type != MMC_TYPE_SD_COMBO) {
2598 pm_runtime_set_active(&card->dev);
2599 pm_runtime_enable(&card->dev);
2600 }
2601
1da177e4
LT		 2602 return 0;
2603
2604 out:
371a689f
AW		 2605 mmc_blk_remove_parts(card, md);
2606 mmc_blk_remove_req(md);
5865f287 2607 return 0;
1da177e4
LT		 2608}
2609
96541bac 2610static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2611{
96541bac 2612 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2613
371a689f 2614 mmc_blk_remove_parts(card, md);
e94cfef6 2615 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2616 mmc_claim_host(card->host);
2617 mmc_blk_part_switch(card, md);
2618 mmc_release_host(card->host);
e94cfef6
UH		 2619 if (card->type != MMC_TYPE_SD_COMBO)
2620 pm_runtime_disable(&card->dev);
2621 pm_runtime_put_noidle(&card->dev);
371a689f 2622 mmc_blk_remove_req(md);
96541bac 2623 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2624}
2625
96541bac 2626static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2627{
371a689f 2628 struct mmc_blk_data *part_md;
96541bac 2629 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2630
2631 if (md) {
2632 mmc_queue_suspend(&md->queue);
371a689f
AW		 2633 list_for_each_entry(part_md, &md->part, part) {
2634 mmc_queue_suspend(&part_md->queue);
2635 }
1da177e4
LT		 2636 }
2637 return 0;
2638}
2639
96541bac 2640static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2641{
96541bac 2642 _mmc_blk_suspend(card);
76287748
UH		 2643}
2644
0967edc6
UH		 2645#ifdef CONFIG_PM_SLEEP
2646static int mmc_blk_suspend(struct device *dev)
76287748 2647{
96541bac
UH		 2648 struct mmc_card *card = mmc_dev_to_card(dev);
2649
2650 return _mmc_blk_suspend(card);
76287748
UH		 2651}
2652
0967edc6 2653static int mmc_blk_resume(struct device *dev)
1da177e4 2654{
371a689f 2655 struct mmc_blk_data *part_md;
fc95e30b 2656 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2657
2658 if (md) {
371a689f
AW		 2659 /*
2660 * Resume involves the card going into idle state,
2661 * so current partition is always the main one.
2662 */
2663 md->part_curr = md->part_type;
1da177e4 2664 mmc_queue_resume(&md->queue);
371a689f
AW		 2665 list_for_each_entry(part_md, &md->part, part) {
2666 mmc_queue_resume(&part_md->queue);
2667 }
1da177e4
LT		 2668 }
2669 return 0;
2670}
1da177e4
LT		 2671#endif
2672
0967edc6
UH		 2673static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2674
96541bac
UH		 2675static struct mmc_driver mmc_driver = {
2676 .drv = {
2677 .name = "mmcblk",
2678 .pm = &mmc_blk_pm_ops,
2679 },
1da177e4
LT		 2680 .probe = mmc_blk_probe,
2681 .remove = mmc_blk_remove,
76287748 2682 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2683};
2684
2685static int __init mmc_blk_init(void)
2686{
9d4e98e9 2687 int res;
1da177e4 2688
5e71b7a6
OJ		 2689 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2690 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2691
a26eba61 2692 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2693
fe6b4c88
PO		 2694 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2695 if (res)
1da177e4 2696 goto out;
1da177e4 2697
9d4e98e9
AM		 2698 res = mmc_register_driver(&mmc_driver);
2699 if (res)
2700 goto out2;
1da177e4 2701
9d4e98e9
AM		 2702 return 0;
2703 out2:
2704 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2705 out:
2706 return res;
2707}
2708
2709static void __exit mmc_blk_exit(void)
2710{
2711 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2712 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2713}
2714
2715module_init(mmc_blk_init);
2716module_exit(mmc_blk_exit);
2717
2718MODULE_LICENSE("GPL");
2719MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2720
Ubuntu Artful kernel mirror