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mmc: sdhci: removed unneeded function wrappers
[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>
b10fa99e 38#include <linux/idr.h>
1da177e4 39
cb87ea28 40#include <linux/mmc/ioctl.h>
1da177e4 41#include <linux/mmc/card.h>
385e3227 42#include <linux/mmc/host.h>
da7fbe58
PO		 43#include <linux/mmc/mmc.h>
44#include <linux/mmc/sd.h>
1da177e4 45
1da177e4
LT		 46#include <asm/uaccess.h>
47
98ac2162 48#include "queue.h"
1da177e4 49
6b0b6285 50MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 51#ifdef MODULE_PARAM_PREFIX
52#undef MODULE_PARAM_PREFIX
53#endif
54#define MODULE_PARAM_PREFIX "mmcblk."
55
6a7a6b45
AW		 56#define INAND_CMD38_ARG_EXT_CSD 113
57#define INAND_CMD38_ARG_ERASE 0x00
58#define INAND_CMD38_ARG_TRIM 0x01
59#define INAND_CMD38_ARG_SECERASE 0x80
60#define INAND_CMD38_ARG_SECTRIM1 0x81
61#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 62#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 63#define MMC_SANITIZE_REQ_TIMEOUT 240000
64#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 65
d3df0465 66#define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
ce39f9d1
SJ		 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
a26eba61 81 * limited to (1 << 20) / number of minors per device. It is also
b10fa99e 82 * limited by the MAX_DEVICES below.
5e71b7a6
OJ		 83 */
84static int max_devices;
85
a26eba61
BH		 86#define MAX_DEVICES 256
87
b10fa99e
UH		 88static DEFINE_IDA(mmc_blk_ida);
89static DEFINE_SPINLOCK(mmc_blk_lock);
1da177e4 90
1da177e4
LT		 91/*
92 * There is one mmc_blk_data per slot.
93 */
94struct mmc_blk_data {
95 spinlock_t lock;
96 struct gendisk *disk;
97 struct mmc_queue queue;
371a689f 98 struct list_head part;
1da177e4 99
d0c97cfb
AW		 100 unsigned int flags;
101#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
102#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 103#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 104
1da177e4 105 unsigned int usage;
a6f6c96b 106 unsigned int read_only;
371a689f 107 unsigned int part_type;
67716327
AH		 108 unsigned int reset_done;
109#define MMC_BLK_READ BIT(0)
110#define MMC_BLK_WRITE BIT(1)
111#define MMC_BLK_DISCARD BIT(2)
112#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 113
114 /*
115 * Only set in main mmc_blk_data associated
fc95e30b 116 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 117 * track of the current selected device partition.
118 */
119 unsigned int part_curr;
120 struct device_attribute force_ro;
add710ea
JR		 121 struct device_attribute power_ro_lock;
122 int area_type;
1da177e4
LT		 123};
124
a621aaed 125static DEFINE_MUTEX(open_lock);
1da177e4 126
ce39f9d1
SJ		 127enum {
128 MMC_PACKED_NR_IDX = -1,
129 MMC_PACKED_NR_ZERO,
130 MMC_PACKED_NR_SINGLE,
131};
132
5e71b7a6
OJ		 133module_param(perdev_minors, int, 0444);
134MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
135
8d1e977d
LP		 136static inline int mmc_blk_part_switch(struct mmc_card *card,
137 struct mmc_blk_data *md);
138static int get_card_status(struct mmc_card *card, u32 *status, int retries);
139
ce39f9d1
SJ		 140static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
141{
142 struct mmc_packed *packed = mqrq->packed;
143
144 BUG_ON(!packed);
145
146 mqrq->cmd_type = MMC_PACKED_NONE;
147 packed->nr_entries = MMC_PACKED_NR_ZERO;
148 packed->idx_failure = MMC_PACKED_NR_IDX;
149 packed->retries = 0;
150 packed->blocks = 0;
151}
152
1da177e4
LT		 153static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
154{
155 struct mmc_blk_data *md;
156
a621aaed 157 mutex_lock(&open_lock);
1da177e4
LT		 158 md = disk->private_data;
159 if (md && md->usage == 0)
160 md = NULL;
161 if (md)
162 md->usage++;
a621aaed 163 mutex_unlock(&open_lock);
1da177e4
LT		 164
165 return md;
166}
167
371a689f
AW		 168static inline int mmc_get_devidx(struct gendisk *disk)
169{
382c55f8 170 int devidx = disk->first_minor / perdev_minors;
371a689f
AW		 171 return devidx;
172}
173
1da177e4
LT		 174static void mmc_blk_put(struct mmc_blk_data *md)
175{
a621aaed 176 mutex_lock(&open_lock);
1da177e4
LT		 177 md->usage--;
178 if (md->usage == 0) {
371a689f 179 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 180 blk_cleanup_queue(md->queue.queue);
181
b10fa99e
UH		 182 spin_lock(&mmc_blk_lock);
183 ida_remove(&mmc_blk_ida, devidx);
184 spin_unlock(&mmc_blk_lock);
1dff3144 185
1da177e4 186 put_disk(md->disk);
1da177e4
LT		 187 kfree(md);
188 }
a621aaed 189 mutex_unlock(&open_lock);
1da177e4
LT		 190}
191
add710ea
JR		 192static ssize_t power_ro_lock_show(struct device *dev,
193 struct device_attribute *attr, char *buf)
194{
195 int ret;
196 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
197 struct mmc_card *card = md->queue.card;
198 int locked = 0;
199
200 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
201 locked = 2;
202 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
203 locked = 1;
204
205 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
206
9098f84c
TW		 207 mmc_blk_put(md);
208
add710ea
JR		 209 return ret;
210}
211
212static ssize_t power_ro_lock_store(struct device *dev,
213 struct device_attribute *attr, const char *buf, size_t count)
214{
215 int ret;
216 struct mmc_blk_data *md, *part_md;
217 struct mmc_card *card;
218 unsigned long set;
219
220 if (kstrtoul(buf, 0, &set))
221 return -EINVAL;
222
223 if (set != 1)
224 return count;
225
226 md = mmc_blk_get(dev_to_disk(dev));
227 card = md->queue.card;
228
e94cfef6 229 mmc_get_card(card);
add710ea
JR		 230
231 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
232 card->ext_csd.boot_ro_lock |
233 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
234 card->ext_csd.part_time);
235 if (ret)
236 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
237 else
238 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
239
e94cfef6 240 mmc_put_card(card);
add710ea
JR		 241
242 if (!ret) {
243 pr_info("%s: Locking boot partition ro until next power on\n",
244 md->disk->disk_name);
245 set_disk_ro(md->disk, 1);
246
247 list_for_each_entry(part_md, &md->part, part)
248 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
249 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
250 set_disk_ro(part_md->disk, 1);
251 }
252 }
253
254 mmc_blk_put(md);
255 return count;
256}
257
371a689f
AW		 258static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
259 char *buf)
260{
261 int ret;
262 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
263
0031a98a 264 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 265 get_disk_ro(dev_to_disk(dev)) ^
266 md->read_only);
267 mmc_blk_put(md);
268 return ret;
269}
270
271static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
272 const char *buf, size_t count)
273{
274 int ret;
275 char *end;
276 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
277 unsigned long set = simple_strtoul(buf, &end, 0);
278 if (end == buf) {
279 ret = -EINVAL;
280 goto out;
281 }
282
283 set_disk_ro(dev_to_disk(dev), set || md->read_only);
284 ret = count;
285out:
286 mmc_blk_put(md);
287 return ret;
288}
289
a5a1561f 290static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 291{
a5a1561f 292 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 293 int ret = -ENXIO;
294
2a48fc0a 295 mutex_lock(&block_mutex);
1da177e4
LT		 296 if (md) {
297 if (md->usage == 2)
a5a1561f 298 check_disk_change(bdev);
1da177e4 299 ret = 0;
a00fc090 300
a5a1561f 301 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 302 mmc_blk_put(md);
a00fc090 303 ret = -EROFS;
70bb0896 304 }
1da177e4 305 }
2a48fc0a 306 mutex_unlock(&block_mutex);
1da177e4
LT		 307
308 return ret;
309}
310
db2a144b 311static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 312{
a5a1561f 313 struct mmc_blk_data *md = disk->private_data;
1da177e4 314
2a48fc0a 315 mutex_lock(&block_mutex);
1da177e4 316 mmc_blk_put(md);
2a48fc0a 317 mutex_unlock(&block_mutex);
1da177e4
LT		 318}
319
320static int
a885c8c4 321mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 322{
a885c8c4
CH		 323 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
324 geo->heads = 4;
325 geo->sectors = 16;
326 return 0;
1da177e4
LT		 327}
328
cb87ea28
JC		 329struct mmc_blk_ioc_data {
330 struct mmc_ioc_cmd ic;
331 unsigned char *buf;
332 u64 buf_bytes;
333};
334
335static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
336 struct mmc_ioc_cmd __user *user)
337{
338 struct mmc_blk_ioc_data *idata;
339 int err;
340
1ff8950c 341 idata = kmalloc(sizeof(*idata), GFP_KERNEL);
cb87ea28
JC		 342 if (!idata) {
343 err = -ENOMEM;
aea253ec 344 goto out;
cb87ea28
JC		 345 }
346
347 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
348 err = -EFAULT;
aea253ec 349 goto idata_err;
cb87ea28
JC		 350 }
351
352 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
353 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
354 err = -EOVERFLOW;
aea253ec 355 goto idata_err;
cb87ea28
JC		 356 }
357
4d6144de
JR		 358 if (!idata->buf_bytes)
359 return idata;
360
1ff8950c 361 idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
cb87ea28
JC		 362 if (!idata->buf) {
363 err = -ENOMEM;
aea253ec 364 goto idata_err;
cb87ea28
JC		 365 }
366
367 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
368 idata->ic.data_ptr, idata->buf_bytes)) {
369 err = -EFAULT;
370 goto copy_err;
371 }
372
373 return idata;
374
375copy_err:
376 kfree(idata->buf);
aea253ec 377idata_err:
cb87ea28 378 kfree(idata);
aea253ec 379out:
cb87ea28 380 return ERR_PTR(err);
cb87ea28
JC		 381}
382
a5f5774c
JH		 383static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
384 struct mmc_blk_ioc_data *idata)
385{
386 struct mmc_ioc_cmd *ic = &idata->ic;
387
388 if (copy_to_user(&(ic_ptr->response), ic->response,
389 sizeof(ic->response)))
390 return -EFAULT;
391
392 if (!idata->ic.write_flag) {
393 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
394 idata->buf, idata->buf_bytes))
395 return -EFAULT;
396 }
397
398 return 0;
399}
400
8d1e977d
LP		 401static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
402 u32 retries_max)
403{
404 int err;
405 u32 retry_count = 0;
406
407 if (!status || !retries_max)
408 return -EINVAL;
409
410 do {
411 err = get_card_status(card, status, 5);
412 if (err)
413 break;
414
415 if (!R1_STATUS(*status) &&
416 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
417 break; /* RPMB programming operation complete */
418
419 /*
420 * Rechedule to give the MMC device a chance to continue
421 * processing the previous command without being polled too
422 * frequently.
423 */
424 usleep_range(1000, 5000);
425 } while (++retry_count < retries_max);
426
427 if (retry_count == retries_max)
428 err = -EPERM;
429
430 return err;
431}
432
775a9362
ME		 433static int ioctl_do_sanitize(struct mmc_card *card)
434{
435 int err;
436
a2d1086d 437 if (!mmc_can_sanitize(card)) {
775a9362
ME		 438 pr_warn("%s: %s - SANITIZE is not supported\n",
439 mmc_hostname(card->host), __func__);
440 err = -EOPNOTSUPP;
441 goto out;
442 }
443
444 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
445 mmc_hostname(card->host), __func__);
446
447 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
448 EXT_CSD_SANITIZE_START, 1,
449 MMC_SANITIZE_REQ_TIMEOUT);
450
451 if (err)
452 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
453 mmc_hostname(card->host), __func__, err);
454
455 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
456 __func__);
457out:
458 return err;
459}
460
a5f5774c
JH		 461static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
462 struct mmc_blk_ioc_data *idata)
cb87ea28 463{
cb87ea28
JC		 464 struct mmc_command cmd = {0};
465 struct mmc_data data = {0};
ad5fd972 466 struct mmc_request mrq = {NULL};
cb87ea28
JC		 467 struct scatterlist sg;
468 int err;
8d1e977d
LP		 469 int is_rpmb = false;
470 u32 status = 0;
cb87ea28 471
a5f5774c
JH		 472 if (!card || !md || !idata)
473 return -EINVAL;
cb87ea28 474
8d1e977d
LP		 475 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
476 is_rpmb = true;
477
4d6144de
JR		 478 cmd.opcode = idata->ic.opcode;
479 cmd.arg = idata->ic.arg;
480 cmd.flags = idata->ic.flags;
481
482 if (idata->buf_bytes) {
483 data.sg = &sg;
484 data.sg_len = 1;
485 data.blksz = idata->ic.blksz;
486 data.blocks = idata->ic.blocks;
487
488 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
489
490 if (idata->ic.write_flag)
491 data.flags = MMC_DATA_WRITE;
492 else
493 data.flags = MMC_DATA_READ;
494
495 /* data.flags must already be set before doing this. */
496 mmc_set_data_timeout(&data, card);
497
498 /* Allow overriding the timeout_ns for empirical tuning. */
499 if (idata->ic.data_timeout_ns)
500 data.timeout_ns = idata->ic.data_timeout_ns;
501
502 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
503 /*
504 * Pretend this is a data transfer and rely on the
505 * host driver to compute timeout. When all host
506 * drivers support cmd.cmd_timeout for R1B, this
507 * can be changed to:
508 *
509 * mrq.data = NULL;
510 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
511 */
512 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
513 }
514
515 mrq.data = &data;
516 }
517
518 mrq.cmd = &cmd;
519
8d1e977d
LP		 520 err = mmc_blk_part_switch(card, md);
521 if (err)
a5f5774c 522 return err;
8d1e977d 523
cb87ea28
JC		 524 if (idata->ic.is_acmd) {
525 err = mmc_app_cmd(card->host, card);
526 if (err)
a5f5774c 527 return err;
cb87ea28
JC		 528 }
529
8d1e977d
LP		 530 if (is_rpmb) {
531 err = mmc_set_blockcount(card, data.blocks,
532 idata->ic.write_flag & (1 << 31));
533 if (err)
a5f5774c 534 return err;
8d1e977d
LP		 535 }
536
a82e484e
YG		 537 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
538 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 539 err = ioctl_do_sanitize(card);
540
541 if (err)
542 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
543 __func__, err);
544
a5f5774c 545 return err;
775a9362
ME		 546 }
547
cb87ea28
JC		 548 mmc_wait_for_req(card->host, &mrq);
549
550 if (cmd.error) {
551 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
552 __func__, cmd.error);
a5f5774c 553 return cmd.error;
cb87ea28
JC		 554 }
555 if (data.error) {
556 dev_err(mmc_dev(card->host), "%s: data error %d\n",
557 __func__, data.error);
a5f5774c 558 return data.error;
cb87ea28
JC		 559 }
560
561 /*
562 * According to the SD specs, some commands require a delay after
563 * issuing the command.
564 */
565 if (idata->ic.postsleep_min_us)
566 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
567
a5f5774c 568 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
cb87ea28 569
8d1e977d
LP		 570 if (is_rpmb) {
571 /*
572 * Ensure RPMB command has completed by polling CMD13
573 * "Send Status".
574 */
575 err = ioctl_rpmb_card_status_poll(card, &status, 5);
576 if (err)
577 dev_err(mmc_dev(card->host),
578 "%s: Card Status=0x%08X, error %d\n",
579 __func__, status, err);
580 }
581
a5f5774c
JH		 582 return err;
583}
584
585static int mmc_blk_ioctl_cmd(struct block_device *bdev,
586 struct mmc_ioc_cmd __user *ic_ptr)
587{
588 struct mmc_blk_ioc_data *idata;
589 struct mmc_blk_data *md;
590 struct mmc_card *card;
b093410c 591 int err = 0, ioc_err = 0;
a5f5774c 592
83c742c3
SL		 593 /*
594 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
595 * whole block device, not on a partition. This prevents overspray
596 * between sibling partitions.
597 */
598 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
599 return -EPERM;
600
a5f5774c
JH		 601 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
602 if (IS_ERR(idata))
603 return PTR_ERR(idata);
604
605 md = mmc_blk_get(bdev->bd_disk);
606 if (!md) {
607 err = -EINVAL;
608 goto cmd_err;
609 }
610
611 card = md->queue.card;
612 if (IS_ERR(card)) {
613 err = PTR_ERR(card);
614 goto cmd_done;
615 }
616
617 mmc_get_card(card);
618
b093410c 619 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
a5f5774c 620
e94cfef6 621 mmc_put_card(card);
cb87ea28 622
b093410c 623 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
a5f5774c 624
cb87ea28
JC		 625cmd_done:
626 mmc_blk_put(md);
1c02f000 627cmd_err:
cb87ea28
JC		 628 kfree(idata->buf);
629 kfree(idata);
b093410c 630 return ioc_err ? ioc_err : err;
cb87ea28
JC		 631}
632
a5f5774c
JH		 633static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
634 struct mmc_ioc_multi_cmd __user *user)
635{
636 struct mmc_blk_ioc_data **idata = NULL;
637 struct mmc_ioc_cmd __user *cmds = user->cmds;
638 struct mmc_card *card;
639 struct mmc_blk_data *md;
b093410c 640 int i, err = 0, ioc_err = 0;
a5f5774c
JH		 641 __u64 num_of_cmds;
642
83c742c3
SL		 643 /*
644 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
645 * whole block device, not on a partition. This prevents overspray
646 * between sibling partitions.
647 */
648 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
649 return -EPERM;
650
a5f5774c
JH		 651 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
652 sizeof(num_of_cmds)))
653 return -EFAULT;
654
655 if (num_of_cmds > MMC_IOC_MAX_CMDS)
656 return -EINVAL;
657
658 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
659 if (!idata)
660 return -ENOMEM;
661
662 for (i = 0; i < num_of_cmds; i++) {
663 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
664 if (IS_ERR(idata[i])) {
665 err = PTR_ERR(idata[i]);
666 num_of_cmds = i;
667 goto cmd_err;
668 }
669 }
670
671 md = mmc_blk_get(bdev->bd_disk);
f00ab14c
OJ		 672 if (!md) {
673 err = -EINVAL;
a5f5774c 674 goto cmd_err;
f00ab14c 675 }
a5f5774c
JH		 676
677 card = md->queue.card;
678 if (IS_ERR(card)) {
679 err = PTR_ERR(card);
680 goto cmd_done;
681 }
682
683 mmc_get_card(card);
684
b093410c
GG		 685 for (i = 0; i < num_of_cmds && !ioc_err; i++)
686 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
a5f5774c
JH		 687
688 mmc_put_card(card);
689
690 /* copy to user if data and response */
b093410c 691 for (i = 0; i < num_of_cmds && !err; i++)
a5f5774c 692 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
a5f5774c
JH		 693
694cmd_done:
695 mmc_blk_put(md);
696cmd_err:
697 for (i = 0; i < num_of_cmds; i++) {
698 kfree(idata[i]->buf);
699 kfree(idata[i]);
700 }
701 kfree(idata);
b093410c 702 return ioc_err ? ioc_err : err;
a5f5774c
JH		 703}
704
cb87ea28
JC		 705static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
706 unsigned int cmd, unsigned long arg)
707{
a5f5774c
JH		 708 switch (cmd) {
709 case MMC_IOC_CMD:
710 return mmc_blk_ioctl_cmd(bdev,
711 (struct mmc_ioc_cmd __user *)arg);
712 case MMC_IOC_MULTI_CMD:
713 return mmc_blk_ioctl_multi_cmd(bdev,
714 (struct mmc_ioc_multi_cmd __user *)arg);
715 default:
716 return -EINVAL;
717 }
cb87ea28
JC		 718}
719
720#ifdef CONFIG_COMPAT
721static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
722 unsigned int cmd, unsigned long arg)
723{
724 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
725}
726#endif
727
83d5cde4 728static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 729 .open = mmc_blk_open,
730 .release = mmc_blk_release,
a885c8c4 731 .getgeo = mmc_blk_getgeo,
1da177e4 732 .owner = THIS_MODULE,
cb87ea28
JC		 733 .ioctl = mmc_blk_ioctl,
734#ifdef CONFIG_COMPAT
735 .compat_ioctl = mmc_blk_compat_ioctl,
736#endif
1da177e4
LT		 737};
738
371a689f
AW		 739static inline int mmc_blk_part_switch(struct mmc_card *card,
740 struct mmc_blk_data *md)
741{
742 int ret;
fc95e30b 743 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 744
371a689f
AW		 745 if (main_md->part_curr == md->part_type)
746 return 0;
747
748 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 749 u8 part_config = card->ext_csd.part_config;
750
751 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
752 part_config |= md->part_type;
371a689f
AW		 753
754 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 755 EXT_CSD_PART_CONFIG, part_config,
371a689f
AW		 756 card->ext_csd.part_time);
757 if (ret)
758 return ret;
0d7d85ca
AH		 759
760 card->ext_csd.part_config = part_config;
67716327 761 }
371a689f
AW		 762
763 main_md->part_curr = md->part_type;
764 return 0;
765}
766
ec5a19dd
PO		 767static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
768{
769 int err;
051913da
BD		 770 u32 result;
771 __be32 *blocks;
ec5a19dd 772
ad5fd972 773 struct mmc_request mrq = {NULL};
1278dba1 774 struct mmc_command cmd = {0};
a61ad2b4 775 struct mmc_data data = {0};
ec5a19dd
PO		 776
777 struct scatterlist sg;
778
ec5a19dd
PO		 779 cmd.opcode = MMC_APP_CMD;
780 cmd.arg = card->rca << 16;
7213d175 781 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 782
783 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 784 if (err)
785 return (u32)-1;
786 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 787 return (u32)-1;
788
789 memset(&cmd, 0, sizeof(struct mmc_command));
790
791 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
792 cmd.arg = 0;
7213d175 793 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 794
ec5a19dd
PO		 795 data.blksz = 4;
796 data.blocks = 1;
797 data.flags = MMC_DATA_READ;
798 data.sg = &sg;
799 data.sg_len = 1;
d380443c 800 mmc_set_data_timeout(&data, card);
ec5a19dd 801
ec5a19dd
PO		 802 mrq.cmd = &cmd;
803 mrq.data = &data;
804
051913da
BD		 805 blocks = kmalloc(4, GFP_KERNEL);
806 if (!blocks)
807 return (u32)-1;
808
809 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 810
811 mmc_wait_for_req(card->host, &mrq);
812
051913da
BD		 813 result = ntohl(*blocks);
814 kfree(blocks);
815
17b0429d 816 if (cmd.error || data.error)
051913da 817 result = (u32)-1;
ec5a19dd 818
051913da 819 return result;
ec5a19dd
PO		 820}
821
0a2d4048 822static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 823{
1278dba1 824 struct mmc_command cmd = {0};
504f191f
AH		 825 int err;
826
504f191f
AH		 827 cmd.opcode = MMC_SEND_STATUS;
828 if (!mmc_host_is_spi(card->host))
829 cmd.arg = card->rca << 16;
830 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 831 err = mmc_wait_for_cmd(card->host, &cmd, retries);
832 if (err == 0)
833 *status = cmd.resp[0];
834 return err;
504f191f
AH		 835}
836
c49433fb 837static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 838 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 839{
840 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
841 int err = 0;
842 u32 status;
843
844 do {
845 err = get_card_status(card, &status, 5);
846 if (err) {
847 pr_err("%s: error %d requesting status\n",
848 req->rq_disk->disk_name, err);
849 return err;
850 }
851
852 if (status & R1_ERROR) {
853 pr_err("%s: %s: error sending status cmd, status %#x\n",
854 req->rq_disk->disk_name, __func__, status);
855 *gen_err = 1;
856 }
857
95a91298
UH		 858 /* We may rely on the host hw to handle busy detection.*/
859 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
860 hw_busy_detect)
861 break;
862
c49433fb
UH		 863 /*
864 * Timeout if the device never becomes ready for data and never
865 * leaves the program state.
866 */
867 if (time_after(jiffies, timeout)) {
868 pr_err("%s: Card stuck in programming state! %s %s\n",
869 mmc_hostname(card->host),
870 req->rq_disk->disk_name, __func__);
871 return -ETIMEDOUT;
872 }
873
874 /*
875 * Some cards mishandle the status bits,
876 * so make sure to check both the busy
877 * indication and the card state.
878 */
879 } while (!(status & R1_READY_FOR_DATA) ||
880 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
881
882 return err;
883}
884
bb5cba40
UH		 885static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
886 struct request *req, int *gen_err, u32 *stop_status)
887{
888 struct mmc_host *host = card->host;
889 struct mmc_command cmd = {0};
890 int err;
891 bool use_r1b_resp = rq_data_dir(req) == WRITE;
892
893 /*
894 * Normally we use R1B responses for WRITE, but in cases where the host
895 * has specified a max_busy_timeout we need to validate it. A failure
896 * means we need to prevent the host from doing hw busy detection, which
897 * is done by converting to a R1 response instead.
898 */
899 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
900 use_r1b_resp = false;
901
902 cmd.opcode = MMC_STOP_TRANSMISSION;
903 if (use_r1b_resp) {
904 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
905 cmd.busy_timeout = timeout_ms;
906 } else {
907 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
908 }
909
910 err = mmc_wait_for_cmd(host, &cmd, 5);
911 if (err)
912 return err;
913
914 *stop_status = cmd.resp[0];
915
916 /* No need to check card status in case of READ. */
917 if (rq_data_dir(req) == READ)
918 return 0;
919
920 if (!mmc_host_is_spi(host) &&
921 (*stop_status & R1_ERROR)) {
922 pr_err("%s: %s: general error sending stop command, resp %#x\n",
923 req->rq_disk->disk_name, __func__, *stop_status);
924 *gen_err = 1;
925 }
926
927 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
928}
929
a8ad82cc 930#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 931#define ERR_RETRY 2
932#define ERR_ABORT 1
933#define ERR_CONTINUE 0
934
935static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
936 bool status_valid, u32 status)
937{
938 switch (error) {
939 case -EILSEQ:
940 /* response crc error, retry the r/w cmd */
941 pr_err("%s: %s sending %s command, card status %#x\n",
942 req->rq_disk->disk_name, "response CRC error",
943 name, status);
944 return ERR_RETRY;
945
946 case -ETIMEDOUT:
947 pr_err("%s: %s sending %s command, card status %#x\n",
948 req->rq_disk->disk_name, "timed out", name, status);
949
950 /* If the status cmd initially failed, retry the r/w cmd */
951 if (!status_valid)
952 return ERR_RETRY;
953
954 /*
955 * If it was a r/w cmd crc error, or illegal command
956 * (eg, issued in wrong state) then retry - we should
957 * have corrected the state problem above.
958 */
959 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
960 return ERR_RETRY;
961
962 /* Otherwise abort the command */
963 return ERR_ABORT;
964
965 default:
966 /* We don't understand the error code the driver gave us */
967 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
968 req->rq_disk->disk_name, error, status);
969 return ERR_ABORT;
970 }
971}
972
973/*
974 * Initial r/w and stop cmd error recovery.
975 * We don't know whether the card received the r/w cmd or not, so try to
976 * restore things back to a sane state. Essentially, we do this as follows:
977 * - Obtain card status. If the first attempt to obtain card status fails,
978 * the status word will reflect the failed status cmd, not the failed
979 * r/w cmd. If we fail to obtain card status, it suggests we can no
980 * longer communicate with the card.
981 * - Check the card state. If the card received the cmd but there was a
982 * transient problem with the response, it might still be in a data transfer
983 * mode. Try to send it a stop command. If this fails, we can't recover.
984 * - If the r/w cmd failed due to a response CRC error, it was probably
985 * transient, so retry the cmd.
986 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
987 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
988 * illegal cmd, retry.
989 * Otherwise we don't understand what happened, so abort.
990 */
991static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 992 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 993{
994 bool prev_cmd_status_valid = true;
995 u32 status, stop_status = 0;
996 int err, retry;
997
a8ad82cc
SRT		 998 if (mmc_card_removed(card))
999 return ERR_NOMEDIUM;
1000
a01f3ccf
RKAL		 1001 /*
1002 * Try to get card status which indicates both the card state
1003 * and why there was no response. If the first attempt fails,
1004 * we can't be sure the returned status is for the r/w command.
1005 */
1006 for (retry = 2; retry >= 0; retry--) {
1007 err = get_card_status(card, &status, 0);
1008 if (!err)
1009 break;
1010
6f398ad2
AH		 1011 /* Re-tune if needed */
1012 mmc_retune_recheck(card->host);
1013
a01f3ccf
RKAL		 1014 prev_cmd_status_valid = false;
1015 pr_err("%s: error %d sending status command, %sing\n",
1016 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1017 }
1018
1019 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 1020 if (err) {
1021 /* Check if the card is removed */
1022 if (mmc_detect_card_removed(card->host))
1023 return ERR_NOMEDIUM;
a01f3ccf 1024 return ERR_ABORT;
a8ad82cc 1025 }
a01f3ccf 1026
67716327
AH		 1027 /* Flag ECC errors */
1028 if ((status & R1_CARD_ECC_FAILED) ||
1029 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1030 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1031 *ecc_err = 1;
1032
c8760069
KY		 1033 /* Flag General errors */
1034 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1035 if ((status & R1_ERROR) ||
1036 (brq->stop.resp[0] & R1_ERROR)) {
1037 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1038 req->rq_disk->disk_name, __func__,
1039 brq->stop.resp[0], status);
1040 *gen_err = 1;
1041 }
1042
a01f3ccf
RKAL		 1043 /*
1044 * Check the current card state. If it is in some data transfer
1045 * mode, tell it to stop (and hopefully transition back to TRAN.)
1046 */
1047 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1048 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 1049 err = send_stop(card,
1050 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1051 req, gen_err, &stop_status);
1052 if (err) {
a01f3ccf
RKAL		 1053 pr_err("%s: error %d sending stop command\n",
1054 req->rq_disk->disk_name, err);
bb5cba40
UH		 1055 /*
1056 * If the stop cmd also timed out, the card is probably
1057 * not present, so abort. Other errors are bad news too.
1058 */
a01f3ccf 1059 return ERR_ABORT;
bb5cba40
UH		 1060 }
1061
67716327
AH		 1062 if (stop_status & R1_CARD_ECC_FAILED)
1063 *ecc_err = 1;
a01f3ccf
RKAL		 1064 }
1065
1066 /* Check for set block count errors */
1067 if (brq->sbc.error)
1068 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1069 prev_cmd_status_valid, status);
1070
1071 /* Check for r/w command errors */
1072 if (brq->cmd.error)
1073 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1074 prev_cmd_status_valid, status);
1075
67716327
AH		 1076 /* Data errors */
1077 if (!brq->stop.error)
1078 return ERR_CONTINUE;
1079
a01f3ccf 1080 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 1081 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 1082 req->rq_disk->disk_name, brq->stop.error,
1083 brq->cmd.resp[0], status);
1084
1085 /*
1086 * Subsitute in our own stop status as this will give the error
1087 * state which happened during the execution of the r/w command.
1088 */
1089 if (stop_status) {
1090 brq->stop.resp[0] = stop_status;
1091 brq->stop.error = 0;
1092 }
1093 return ERR_CONTINUE;
1094}
1095
67716327
AH		 1096static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1097 int type)
1098{
1099 int err;
1100
1101 if (md->reset_done & type)
1102 return -EEXIST;
1103
1104 md->reset_done |= type;
1105 err = mmc_hw_reset(host);
1106 /* Ensure we switch back to the correct partition */
1107 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1108 struct mmc_blk_data *main_md =
1109 dev_get_drvdata(&host->card->dev);
67716327
AH		 1110 int part_err;
1111
1112 main_md->part_curr = main_md->part_type;
1113 part_err = mmc_blk_part_switch(host->card, md);
1114 if (part_err) {
1115 /*
1116 * We have failed to get back into the correct
1117 * partition, so we need to abort the whole request.
1118 */
1119 return -ENODEV;
1120 }
1121 }
1122 return err;
1123}
1124
1125static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1126{
1127 md->reset_done &= ~type;
1128}
1129
4e93b9a6
CD		 1130int mmc_access_rpmb(struct mmc_queue *mq)
1131{
1132 struct mmc_blk_data *md = mq->data;
1133 /*
1134 * If this is a RPMB partition access, return ture
1135 */
1136 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1137 return true;
1138
1139 return false;
1140}
1141
bd788c96
AH		 1142static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1143{
1144 struct mmc_blk_data *md = mq->data;
1145 struct mmc_card *card = md->queue.card;
1146 unsigned int from, nr, arg;
67716327 1147 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1148
bd788c96
AH		 1149 if (!mmc_can_erase(card)) {
1150 err = -EOPNOTSUPP;
1151 goto out;
1152 }
1153
1154 from = blk_rq_pos(req);
1155 nr = blk_rq_sectors(req);
1156
b3bf9153
KP		 1157 if (mmc_can_discard(card))
1158 arg = MMC_DISCARD_ARG;
1159 else if (mmc_can_trim(card))
bd788c96
AH		 1160 arg = MMC_TRIM_ARG;
1161 else
1162 arg = MMC_ERASE_ARG;
67716327 1163retry:
6a7a6b45
AW		 1164 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1165 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1166 INAND_CMD38_ARG_EXT_CSD,
1167 arg == MMC_TRIM_ARG ?
1168 INAND_CMD38_ARG_TRIM :
1169 INAND_CMD38_ARG_ERASE,
1170 0);
1171 if (err)
1172 goto out;
1173 }
bd788c96
AH		 1174 err = mmc_erase(card, from, nr, arg);
1175out:
67716327
AH		 1176 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1177 goto retry;
1178 if (!err)
1179 mmc_blk_reset_success(md, type);
ecf8b5d0 1180 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1181
bd788c96
AH		 1182 return err ? 0 : 1;
1183}
1184
49804548
AH		 1185static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1186 struct request *req)
1187{
1188 struct mmc_blk_data *md = mq->data;
1189 struct mmc_card *card = md->queue.card;
775a9362 1190 unsigned int from, nr, arg;
67716327 1191 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1192
775a9362 1193 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1194 err = -EOPNOTSUPP;
1195 goto out;
1196 }
1197
28302812
AH		 1198 from = blk_rq_pos(req);
1199 nr = blk_rq_sectors(req);
1200
775a9362
ME		 1201 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1202 arg = MMC_SECURE_TRIM1_ARG;
1203 else
1204 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1205
67716327 1206retry:
6a7a6b45
AW		 1207 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1208 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1209 INAND_CMD38_ARG_EXT_CSD,
1210 arg == MMC_SECURE_TRIM1_ARG ?
1211 INAND_CMD38_ARG_SECTRIM1 :
1212 INAND_CMD38_ARG_SECERASE,
1213 0);
1214 if (err)
28302812 1215 goto out_retry;
6a7a6b45 1216 }
28302812 1217
49804548 1218 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1219 if (err == -EIO)
1220 goto out_retry;
1221 if (err)
1222 goto out;
1223
1224 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1225 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1226 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1227 INAND_CMD38_ARG_EXT_CSD,
1228 INAND_CMD38_ARG_SECTRIM2,
1229 0);
1230 if (err)
28302812 1231 goto out_retry;
6a7a6b45 1232 }
28302812 1233
49804548 1234 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1235 if (err == -EIO)
1236 goto out_retry;
1237 if (err)
1238 goto out;
6a7a6b45 1239 }
28302812 1240
28302812
AH		 1241out_retry:
1242 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1243 goto retry;
1244 if (!err)
1245 mmc_blk_reset_success(md, type);
28302812 1246out:
ecf8b5d0 1247 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1248
49804548
AH		 1249 return err ? 0 : 1;
1250}
1251
f4c5522b
AW		 1252static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1253{
1254 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1255 struct mmc_card *card = md->queue.card;
1256 int ret = 0;
1257
1258 ret = mmc_flush_cache(card);
1259 if (ret)
1260 ret = -EIO;
f4c5522b 1261
ecf8b5d0 1262 blk_end_request_all(req, ret);
f4c5522b 1263
881d1c25 1264 return ret ? 0 : 1;
f4c5522b
AW		 1265}
1266
1267/*
1268 * Reformat current write as a reliable write, supporting
1269 * both legacy and the enhanced reliable write MMC cards.
1270 * In each transfer we'll handle only as much as a single
1271 * reliable write can handle, thus finish the request in
1272 * partial completions.
1273 */
d0c97cfb
AW		 1274static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1275 struct mmc_card *card,
1276 struct request *req)
f4c5522b 1277{
f4c5522b
AW		 1278 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1279 /* Legacy mode imposes restrictions on transfers. */
1280 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1281 brq->data.blocks = 1;
1282
1283 if (brq->data.blocks > card->ext_csd.rel_sectors)
1284 brq->data.blocks = card->ext_csd.rel_sectors;
1285 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1286 brq->data.blocks = 1;
1287 }
f4c5522b
AW		 1288}
1289
4c2b8f26
RKAL		 1290#define CMD_ERRORS \
1291 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1292 R1_ADDRESS_ERROR | /* Misaligned address */ \
1293 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1294 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1295 R1_CC_ERROR | /* Card controller error */ \
1296 R1_ERROR) /* General/unknown error */
1297
ee8a43a5
PF		 1298static int mmc_blk_err_check(struct mmc_card *card,
1299 struct mmc_async_req *areq)
d78d4a8a 1300{
ee8a43a5
PF		 1301 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1302 mmc_active);
1303 struct mmc_blk_request *brq = &mq_mrq->brq;
1304 struct request *req = mq_mrq->req;
b8360a49 1305 int need_retune = card->host->need_retune;
c8760069 1306 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1307
1308 /*
1309 * sbc.error indicates a problem with the set block count
1310 * command. No data will have been transferred.
1311 *
1312 * cmd.error indicates a problem with the r/w command. No
1313 * data will have been transferred.
1314 *
1315 * stop.error indicates a problem with the stop command. Data
1316 * may have been transferred, or may still be transferring.
1317 */
67716327
AH		 1318 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1319 brq->data.error) {
c8760069 1320 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1321 case ERR_RETRY:
1322 return MMC_BLK_RETRY;
1323 case ERR_ABORT:
1324 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1325 case ERR_NOMEDIUM:
1326 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1327 case ERR_CONTINUE:
1328 break;
1329 }
1330 }
1331
1332 /*
1333 * Check for errors relating to the execution of the
1334 * initial command - such as address errors. No data
1335 * has been transferred.
1336 */
1337 if (brq->cmd.resp[0] & CMD_ERRORS) {
1338 pr_err("%s: r/w command failed, status = %#x\n",
1339 req->rq_disk->disk_name, brq->cmd.resp[0]);
1340 return MMC_BLK_ABORT;
1341 }
1342
1343 /*
1344 * Everything else is either success, or a data error of some
1345 * kind. If it was a write, we may have transitioned to
1346 * program mode, which we have to wait for it to complete.
1347 */
1348 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1349 int err;
8fee476b 1350
c8760069
KY		 1351 /* Check stop command response */
1352 if (brq->stop.resp[0] & R1_ERROR) {
1353 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1354 req->rq_disk->disk_name, __func__,
1355 brq->stop.resp[0]);
1356 gen_err = 1;
1357 }
1358
95a91298
UH		 1359 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1360 &gen_err);
c49433fb
UH		 1361 if (err)
1362 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1363 }
1364
c8760069
KY		 1365 /* if general error occurs, retry the write operation. */
1366 if (gen_err) {
1367 pr_warn("%s: retrying write for general error\n",
1368 req->rq_disk->disk_name);
1369 return MMC_BLK_RETRY;
1370 }
1371
d78d4a8a 1372 if (brq->data.error) {
b8360a49 1373 if (need_retune && !brq->retune_retry_done) {
09faf61d
RK		 1374 pr_debug("%s: retrying because a re-tune was needed\n",
1375 req->rq_disk->disk_name);
b8360a49
AH		 1376 brq->retune_retry_done = 1;
1377 return MMC_BLK_RETRY;
1378 }
d78d4a8a
PF		 1379 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1380 req->rq_disk->disk_name, brq->data.error,
1381 (unsigned)blk_rq_pos(req),
1382 (unsigned)blk_rq_sectors(req),
1383 brq->cmd.resp[0], brq->stop.resp[0]);
1384
1385 if (rq_data_dir(req) == READ) {
67716327
AH		 1386 if (ecc_err)
1387 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1388 return MMC_BLK_DATA_ERR;
1389 } else {
1390 return MMC_BLK_CMD_ERR;
1391 }
1392 }
1393
67716327
AH		 1394 if (!brq->data.bytes_xfered)
1395 return MMC_BLK_RETRY;
d78d4a8a 1396
ce39f9d1
SJ		 1397 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1398 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1399 return MMC_BLK_PARTIAL;
1400 else
1401 return MMC_BLK_SUCCESS;
1402 }
1403
67716327
AH		 1404 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1405 return MMC_BLK_PARTIAL;
1406
1407 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1408}
1409
ce39f9d1
SJ		 1410static int mmc_blk_packed_err_check(struct mmc_card *card,
1411 struct mmc_async_req *areq)
1412{
1413 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1414 mmc_active);
1415 struct request *req = mq_rq->req;
1416 struct mmc_packed *packed = mq_rq->packed;
1417 int err, check, status;
1418 u8 *ext_csd;
1419
1420 BUG_ON(!packed);
1421
1422 packed->retries--;
1423 check = mmc_blk_err_check(card, areq);
1424 err = get_card_status(card, &status, 0);
1425 if (err) {
1426 pr_err("%s: error %d sending status command\n",
1427 req->rq_disk->disk_name, err);
1428 return MMC_BLK_ABORT;
1429 }
1430
1431 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1432 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1433 if (err) {
1434 pr_err("%s: error %d sending ext_csd\n",
1435 req->rq_disk->disk_name, err);
86817ffb 1436 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1437 }
1438
1439 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1440 EXT_CSD_PACKED_FAILURE) &&
1441 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1442 EXT_CSD_PACKED_GENERIC_ERROR)) {
1443 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1444 EXT_CSD_PACKED_INDEXED_ERROR) {
1445 packed->idx_failure =
1446 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1447 check = MMC_BLK_PARTIAL;
1448 }
1449 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1450 "failure index: %d\n",
1451 req->rq_disk->disk_name, packed->nr_entries,
1452 packed->blocks, packed->idx_failure);
1453 }
ce39f9d1
SJ		 1454 kfree(ext_csd);
1455 }
1456
1457 return check;
1458}
1459
54d49d77
PF		 1460static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1461 struct mmc_card *card,
1462 int disable_multi,
1463 struct mmc_queue *mq)
1da177e4 1464{
54d49d77
PF		 1465 u32 readcmd, writecmd;
1466 struct mmc_blk_request *brq = &mqrq->brq;
1467 struct request *req = mqrq->req;
1da177e4 1468 struct mmc_blk_data *md = mq->data;
4265900e 1469 bool do_data_tag;
1da177e4 1470
f4c5522b
AW		 1471 /*
1472 * Reliable writes are used to implement Forced Unit Access and
d3df0465 1473 * are supported only on MMCs.
f4c5522b 1474 */
d3df0465 1475 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
f4c5522b 1476 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1477 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1478
54d49d77
PF		 1479 memset(brq, 0, sizeof(struct mmc_blk_request));
1480 brq->mrq.cmd = &brq->cmd;
1481 brq->mrq.data = &brq->data;
1da177e4 1482
54d49d77
PF		 1483 brq->cmd.arg = blk_rq_pos(req);
1484 if (!mmc_card_blockaddr(card))
1485 brq->cmd.arg <<= 9;
1486 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1487 brq->data.blksz = 512;
1488 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1489 brq->stop.arg = 0;
54d49d77 1490 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1491
54d49d77
PF		 1492 /*
1493 * The block layer doesn't support all sector count
1494 * restrictions, so we need to be prepared for too big
1495 * requests.
1496 */
1497 if (brq->data.blocks > card->host->max_blk_count)
1498 brq->data.blocks = card->host->max_blk_count;
1da177e4 1499
2bf22b39
PW		 1500 if (brq->data.blocks > 1) {
1501 /*
1502 * After a read error, we redo the request one sector
1503 * at a time in order to accurately determine which
1504 * sectors can be read successfully.
1505 */
1506 if (disable_multi)
1507 brq->data.blocks = 1;
1508
2e47e842
KM		 1509 /*
1510 * Some controllers have HW issues while operating
1511 * in multiple I/O mode
1512 */
1513 if (card->host->ops->multi_io_quirk)
1514 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1515 (rq_data_dir(req) == READ) ?
1516 MMC_DATA_READ : MMC_DATA_WRITE,
1517 brq->data.blocks);
2bf22b39 1518 }
d0c97cfb 1519
54d49d77
PF		 1520 if (brq->data.blocks > 1 || do_rel_wr) {
1521 /* SPI multiblock writes terminate using a special
1522 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1523 */
54d49d77
PF		 1524 if (!mmc_host_is_spi(card->host) ||
1525 rq_data_dir(req) == READ)
1526 brq->mrq.stop = &brq->stop;
1527 readcmd = MMC_READ_MULTIPLE_BLOCK;
1528 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1529 } else {
1530 brq->mrq.stop = NULL;
1531 readcmd = MMC_READ_SINGLE_BLOCK;
1532 writecmd = MMC_WRITE_BLOCK;
1533 }
1534 if (rq_data_dir(req) == READ) {
1535 brq->cmd.opcode = readcmd;
f53f1102 1536 brq->data.flags = MMC_DATA_READ;
bcc3e172
UH		 1537 if (brq->mrq.stop)
1538 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1539 MMC_CMD_AC;
54d49d77
PF		 1540 } else {
1541 brq->cmd.opcode = writecmd;
f53f1102 1542 brq->data.flags = MMC_DATA_WRITE;
bcc3e172
UH		 1543 if (brq->mrq.stop)
1544 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1545 MMC_CMD_AC;
54d49d77 1546 }
d0c97cfb 1547
54d49d77
PF		 1548 if (do_rel_wr)
1549 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1550
4265900e
SD		 1551 /*
1552 * Data tag is used only during writing meta data to speed
1553 * up write and any subsequent read of this meta data
1554 */
1555 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1556 (req->cmd_flags & REQ_META) &&
1557 (rq_data_dir(req) == WRITE) &&
1558 ((brq->data.blocks * brq->data.blksz) >=
1559 card->ext_csd.data_tag_unit_size);
1560
54d49d77
PF		 1561 /*
1562 * Pre-defined multi-block transfers are preferable to
1563 * open ended-ones (and necessary for reliable writes).
1564 * However, it is not sufficient to just send CMD23,
1565 * and avoid the final CMD12, as on an error condition
1566 * CMD12 (stop) needs to be sent anyway. This, coupled
1567 * with Auto-CMD23 enhancements provided by some
1568 * hosts, means that the complexity of dealing
1569 * with this is best left to the host. If CMD23 is
1570 * supported by card and host, we'll fill sbc in and let
1571 * the host deal with handling it correctly. This means
1572 * that for hosts that don't expose MMC_CAP_CMD23, no
1573 * change of behavior will be observed.
1574 *
1575 * N.B: Some MMC cards experience perf degradation.
1576 * We'll avoid using CMD23-bounded multiblock writes for
1577 * these, while retaining features like reliable writes.
1578 */
4265900e
SD		 1579 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1580 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1581 do_data_tag)) {
54d49d77
PF		 1582 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1583 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1584 (do_rel_wr ? (1 << 31) : 0) |
1585 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1586 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1587 brq->mrq.sbc = &brq->sbc;
1588 }
98ccf149 1589
54d49d77
PF		 1590 mmc_set_data_timeout(&brq->data, card);
1591
1592 brq->data.sg = mqrq->sg;
1593 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1594
1595 /*
1596 * Adjust the sg list so it is the same size as the
1597 * request.
1598 */
1599 if (brq->data.blocks != blk_rq_sectors(req)) {
1600 int i, data_size = brq->data.blocks << 9;
1601 struct scatterlist *sg;
1602
1603 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1604 data_size -= sg->length;
1605 if (data_size <= 0) {
1606 sg->length += data_size;
1607 i++;
1608 break;
6a79e391 1609 }
6a79e391 1610 }
54d49d77
PF		 1611 brq->data.sg_len = i;
1612 }
1613
ee8a43a5
PF		 1614 mqrq->mmc_active.mrq = &brq->mrq;
1615 mqrq->mmc_active.err_check = mmc_blk_err_check;
1616
54d49d77
PF		 1617 mmc_queue_bounce_pre(mqrq);
1618}
6a79e391 1619
ce39f9d1
SJ		 1620static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1621 struct mmc_card *card)
1622{
1623 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1624 unsigned int max_seg_sz = queue_max_segment_size(q);
1625 unsigned int len, nr_segs = 0;
1626
1627 do {
1628 len = min(hdr_sz, max_seg_sz);
1629 hdr_sz -= len;
1630 nr_segs++;
1631 } while (hdr_sz);
1632
1633 return nr_segs;
1634}
1635
1636static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1637{
1638 struct request_queue *q = mq->queue;
1639 struct mmc_card *card = mq->card;
1640 struct request *cur = req, *next = NULL;
1641 struct mmc_blk_data *md = mq->data;
1642 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1643 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1644 unsigned int req_sectors = 0, phys_segments = 0;
1645 unsigned int max_blk_count, max_phys_segs;
1646 bool put_back = true;
1647 u8 max_packed_rw = 0;
1648 u8 reqs = 0;
1649
1650 if (!(md->flags & MMC_BLK_PACKED_CMD))
1651 goto no_packed;
1652
1653 if ((rq_data_dir(cur) == WRITE) &&
1654 mmc_host_packed_wr(card->host))
1655 max_packed_rw = card->ext_csd.max_packed_writes;
1656
1657 if (max_packed_rw == 0)
1658 goto no_packed;
1659
1660 if (mmc_req_rel_wr(cur) &&
1661 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1662 goto no_packed;
1663
1664 if (mmc_large_sector(card) &&
1665 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1666 goto no_packed;
1667
1668 mmc_blk_clear_packed(mqrq);
1669
1670 max_blk_count = min(card->host->max_blk_count,
1671 card->host->max_req_size >> 9);
1672 if (unlikely(max_blk_count > 0xffff))
1673 max_blk_count = 0xffff;
1674
1675 max_phys_segs = queue_max_segments(q);
1676 req_sectors += blk_rq_sectors(cur);
1677 phys_segments += cur->nr_phys_segments;
1678
1679 if (rq_data_dir(cur) == WRITE) {
1680 req_sectors += mmc_large_sector(card) ? 8 : 1;
1681 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1682 }
1683
1684 do {
1685 if (reqs >= max_packed_rw - 1) {
1686 put_back = false;
1687 break;
1688 }
1689
1690 spin_lock_irq(q->queue_lock);
1691 next = blk_fetch_request(q);
1692 spin_unlock_irq(q->queue_lock);
1693 if (!next) {
1694 put_back = false;
1695 break;
1696 }
1697
1698 if (mmc_large_sector(card) &&
1699 !IS_ALIGNED(blk_rq_sectors(next), 8))
1700 break;
1701
1702 if (next->cmd_flags & REQ_DISCARD ||
1703 next->cmd_flags & REQ_FLUSH)
1704 break;
1705
1706 if (rq_data_dir(cur) != rq_data_dir(next))
1707 break;
1708
1709 if (mmc_req_rel_wr(next) &&
1710 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1711 break;
1712
1713 req_sectors += blk_rq_sectors(next);
1714 if (req_sectors > max_blk_count)
1715 break;
1716
1717 phys_segments += next->nr_phys_segments;
1718 if (phys_segments > max_phys_segs)
1719 break;
1720
1721 list_add_tail(&next->queuelist, &mqrq->packed->list);
1722 cur = next;
1723 reqs++;
1724 } while (1);
1725
1726 if (put_back) {
1727 spin_lock_irq(q->queue_lock);
1728 blk_requeue_request(q, next);
1729 spin_unlock_irq(q->queue_lock);
1730 }
1731
1732 if (reqs > 0) {
1733 list_add(&req->queuelist, &mqrq->packed->list);
1734 mqrq->packed->nr_entries = ++reqs;
1735 mqrq->packed->retries = reqs;
1736 return reqs;
1737 }
1738
1739no_packed:
1740 mqrq->cmd_type = MMC_PACKED_NONE;
1741 return 0;
1742}
1743
1744static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1745 struct mmc_card *card,
1746 struct mmc_queue *mq)
1747{
1748 struct mmc_blk_request *brq = &mqrq->brq;
1749 struct request *req = mqrq->req;
1750 struct request *prq;
1751 struct mmc_blk_data *md = mq->data;
1752 struct mmc_packed *packed = mqrq->packed;
1753 bool do_rel_wr, do_data_tag;
1754 u32 *packed_cmd_hdr;
1755 u8 hdr_blocks;
1756 u8 i = 1;
1757
1758 BUG_ON(!packed);
1759
1760 mqrq->cmd_type = MMC_PACKED_WRITE;
1761 packed->blocks = 0;
1762 packed->idx_failure = MMC_PACKED_NR_IDX;
1763
1764 packed_cmd_hdr = packed->cmd_hdr;
1765 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1766 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1767 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1768 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1769
1770 /*
1771 * Argument for each entry of packed group
1772 */
1773 list_for_each_entry(prq, &packed->list, queuelist) {
1774 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1775 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1776 (prq->cmd_flags & REQ_META) &&
1777 (rq_data_dir(prq) == WRITE) &&
1778 ((brq->data.blocks * brq->data.blksz) >=
1779 card->ext_csd.data_tag_unit_size);
1780 /* Argument of CMD23 */
1781 packed_cmd_hdr[(i * 2)] =
1782 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1783 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1784 blk_rq_sectors(prq);
1785 /* Argument of CMD18 or CMD25 */
1786 packed_cmd_hdr[((i * 2)) + 1] =
1787 mmc_card_blockaddr(card) ?
1788 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1789 packed->blocks += blk_rq_sectors(prq);
1790 i++;
1791 }
1792
1793 memset(brq, 0, sizeof(struct mmc_blk_request));
1794 brq->mrq.cmd = &brq->cmd;
1795 brq->mrq.data = &brq->data;
1796 brq->mrq.sbc = &brq->sbc;
1797 brq->mrq.stop = &brq->stop;
1798
1799 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1800 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1801 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1802
1803 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1804 brq->cmd.arg = blk_rq_pos(req);
1805 if (!mmc_card_blockaddr(card))
1806 brq->cmd.arg <<= 9;
1807 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1808
1809 brq->data.blksz = 512;
1810 brq->data.blocks = packed->blocks + hdr_blocks;
f53f1102 1811 brq->data.flags = MMC_DATA_WRITE;
ce39f9d1
SJ		 1812
1813 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1814 brq->stop.arg = 0;
1815 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1816
1817 mmc_set_data_timeout(&brq->data, card);
1818
1819 brq->data.sg = mqrq->sg;
1820 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1821
1822 mqrq->mmc_active.mrq = &brq->mrq;
1823 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1824
1825 mmc_queue_bounce_pre(mqrq);
1826}
1827
67716327
AH		 1828static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1829 struct mmc_blk_request *brq, struct request *req,
1830 int ret)
1831{
ce39f9d1
SJ		 1832 struct mmc_queue_req *mq_rq;
1833 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1834
67716327
AH		 1835 /*
1836 * If this is an SD card and we're writing, we can first
1837 * mark the known good sectors as ok.
1838 *
1839 * If the card is not SD, we can still ok written sectors
1840 * as reported by the controller (which might be less than
1841 * the real number of written sectors, but never more).
1842 */
1843 if (mmc_card_sd(card)) {
1844 u32 blocks;
1845
1846 blocks = mmc_sd_num_wr_blocks(card);
1847 if (blocks != (u32)-1) {
ecf8b5d0 1848 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1849 }
1850 } else {
ce39f9d1
SJ		 1851 if (!mmc_packed_cmd(mq_rq->cmd_type))
1852 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1853 }
1854 return ret;
1855}
1856
ce39f9d1
SJ		 1857static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1858{
1859 struct request *prq;
1860 struct mmc_packed *packed = mq_rq->packed;
1861 int idx = packed->idx_failure, i = 0;
1862 int ret = 0;
1863
1864 BUG_ON(!packed);
1865
1866 while (!list_empty(&packed->list)) {
1867 prq = list_entry_rq(packed->list.next);
1868 if (idx == i) {
1869 /* retry from error index */
1870 packed->nr_entries -= idx;
1871 mq_rq->req = prq;
1872 ret = 1;
1873
1874 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1875 list_del_init(&prq->queuelist);
1876 mmc_blk_clear_packed(mq_rq);
1877 }
1878 return ret;
1879 }
1880 list_del_init(&prq->queuelist);
1881 blk_end_request(prq, 0, blk_rq_bytes(prq));
1882 i++;
1883 }
1884
1885 mmc_blk_clear_packed(mq_rq);
1886 return ret;
1887}
1888
1889static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1890{
1891 struct request *prq;
1892 struct mmc_packed *packed = mq_rq->packed;
1893
1894 BUG_ON(!packed);
1895
1896 while (!list_empty(&packed->list)) {
1897 prq = list_entry_rq(packed->list.next);
1898 list_del_init(&prq->queuelist);
1899 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1900 }
1901
1902 mmc_blk_clear_packed(mq_rq);
1903}
1904
1905static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1906 struct mmc_queue_req *mq_rq)
1907{
1908 struct request *prq;
1909 struct request_queue *q = mq->queue;
1910 struct mmc_packed *packed = mq_rq->packed;
1911
1912 BUG_ON(!packed);
1913
1914 while (!list_empty(&packed->list)) {
1915 prq = list_entry_rq(packed->list.prev);
1916 if (prq->queuelist.prev != &packed->list) {
1917 list_del_init(&prq->queuelist);
1918 spin_lock_irq(q->queue_lock);
1919 blk_requeue_request(mq->queue, prq);
1920 spin_unlock_irq(q->queue_lock);
1921 } else {
1922 list_del_init(&prq->queuelist);
1923 }
1924 }
1925
1926 mmc_blk_clear_packed(mq_rq);
1927}
1928
ee8a43a5 1929static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1930{
1931 struct mmc_blk_data *md = mq->data;
1932 struct mmc_card *card = md->queue.card;
1933 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
b8360a49 1934 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
d78d4a8a 1935 enum mmc_blk_status status;
ee8a43a5 1936 struct mmc_queue_req *mq_rq;
a5075eb9 1937 struct request *req = rqc;
ee8a43a5 1938 struct mmc_async_req *areq;
ce39f9d1
SJ		 1939 const u8 packed_nr = 2;
1940 u8 reqs = 0;
1da177e4 1941
ee8a43a5
PF		 1942 if (!rqc && !mq->mqrq_prev->req)
1943 return 0;
98ccf149 1944
ce39f9d1
SJ		 1945 if (rqc)
1946 reqs = mmc_blk_prep_packed_list(mq, rqc);
1947
ee8a43a5
PF		 1948 do {
1949 if (rqc) {
a5075eb9
SD		 1950 /*
1951 * When 4KB native sector is enabled, only 8 blocks
1952 * multiple read or write is allowed
1953 */
1954 if ((brq->data.blocks & 0x07) &&
1955 (card->ext_csd.data_sector_size == 4096)) {
1956 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1957 req->rq_disk->disk_name);
ce39f9d1 1958 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1959 goto cmd_abort;
1960 }
ce39f9d1
SJ		 1961
1962 if (reqs >= packed_nr)
1963 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1964 card, mq);
1965 else
1966 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1967 areq = &mq->mqrq_cur->mmc_active;
1968 } else
1969 areq = NULL;
1970 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1971 if (!areq) {
1972 if (status == MMC_BLK_NEW_REQUEST)
1973 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1974 return 0;
2220eedf 1975 }
ee8a43a5
PF		 1976
1977 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1978 brq = &mq_rq->brq;
1979 req = mq_rq->req;
67716327 1980 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1981 mmc_queue_bounce_post(mq_rq);
98ccf149 1982
d78d4a8a
PF		 1983 switch (status) {
1984 case MMC_BLK_SUCCESS:
1985 case MMC_BLK_PARTIAL:
1986 /*
1987 * A block was successfully transferred.
1988 */
67716327 1989 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1990
1991 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1992 ret = mmc_blk_end_packed_req(mq_rq);
1993 break;
1994 } else {
1995 ret = blk_end_request(req, 0,
d78d4a8a 1996 brq->data.bytes_xfered);
ce39f9d1
SJ		 1997 }
1998
67716327
AH		 1999 /*
2000 * If the blk_end_request function returns non-zero even
2001 * though all data has been transferred and no errors
2002 * were returned by the host controller, it's a bug.
2003 */
ee8a43a5 2004 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 2005 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 2006 __func__, blk_rq_bytes(req),
2007 brq->data.bytes_xfered);
2008 rqc = NULL;
2009 goto cmd_abort;
2010 }
d78d4a8a
PF		 2011 break;
2012 case MMC_BLK_CMD_ERR:
67716327 2013 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
29535f7b
DW		 2014 if (mmc_blk_reset(md, card->host, type))
2015 goto cmd_abort;
2016 if (!ret)
2017 goto start_new_req;
2018 break;
d78d4a8a 2019 case MMC_BLK_RETRY:
b8360a49 2020 retune_retry_done = brq->retune_retry_done;
d78d4a8a 2021 if (retry++ < 5)
a01f3ccf 2022 break;
67716327 2023 /* Fall through */
d78d4a8a 2024 case MMC_BLK_ABORT:
67716327
AH		 2025 if (!mmc_blk_reset(md, card->host, type))
2026 break;
4c2b8f26 2027 goto cmd_abort;
67716327
AH		 2028 case MMC_BLK_DATA_ERR: {
2029 int err;
2030
2031 err = mmc_blk_reset(md, card->host, type);
2032 if (!err)
2033 break;
ce39f9d1
SJ		 2034 if (err == -ENODEV ||
2035 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 2036 goto cmd_abort;
2037 /* Fall through */
2038 }
2039 case MMC_BLK_ECC_ERR:
2040 if (brq->data.blocks > 1) {
2041 /* Redo read one sector at a time */
6606110d
JP		 2042 pr_warn("%s: retrying using single block read\n",
2043 req->rq_disk->disk_name);
67716327
AH		 2044 disable_multi = 1;
2045 break;
2046 }
d78d4a8a
PF		 2047 /*
2048 * After an error, we redo I/O one sector at a
2049 * time, so we only reach here after trying to
2050 * read a single sector.
2051 */
ecf8b5d0 2052 ret = blk_end_request(req, -EIO,
d78d4a8a 2053 brq->data.blksz);
ee8a43a5
PF		 2054 if (!ret)
2055 goto start_new_req;
d78d4a8a 2056 break;
a8ad82cc
SRT		 2057 case MMC_BLK_NOMEDIUM:
2058 goto cmd_abort;
2220eedf
KD		 2059 default:
2060 pr_err("%s: Unhandled return value (%d)",
2061 req->rq_disk->disk_name, status);
2062 goto cmd_abort;
4c2b8f26
RKAL		 2063 }
2064
ee8a43a5 2065 if (ret) {
ce39f9d1
SJ		 2066 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2067 if (!mq_rq->packed->retries)
2068 goto cmd_abort;
2069 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2070 mmc_start_req(card->host,
2071 &mq_rq->mmc_active, NULL);
2072 } else {
2073
2074 /*
2075 * In case of a incomplete request
2076 * prepare it again and resend.
2077 */
2078 mmc_blk_rw_rq_prep(mq_rq, card,
2079 disable_multi, mq);
2080 mmc_start_req(card->host,
2081 &mq_rq->mmc_active, NULL);
2082 }
b8360a49 2083 mq_rq->brq.retune_retry_done = retune_retry_done;
ee8a43a5 2084 }
1da177e4
LT		 2085 } while (ret);
2086
1da177e4
LT		 2087 return 1;
2088
a01f3ccf 2089 cmd_abort:
ce39f9d1
SJ		 2090 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2091 mmc_blk_abort_packed_req(mq_rq);
2092 } else {
2093 if (mmc_card_removed(card))
2094 req->cmd_flags |= REQ_QUIET;
2095 while (ret)
2096 ret = blk_end_request(req, -EIO,
2097 blk_rq_cur_bytes(req));
2098 }
1da177e4 2099
ee8a43a5
PF		 2100 start_new_req:
2101 if (rqc) {
7a81902f
SJ		 2102 if (mmc_card_removed(card)) {
2103 rqc->cmd_flags |= REQ_QUIET;
2104 blk_end_request_all(rqc, -EIO);
2105 } else {
ce39f9d1
SJ		 2106 /*
2107 * If current request is packed, it needs to put back.
2108 */
2109 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2110 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2111
7a81902f
SJ		 2112 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2113 mmc_start_req(card->host,
2114 &mq->mqrq_cur->mmc_active, NULL);
2115 }
ee8a43a5
PF		 2116 }
2117
1da177e4
LT		 2118 return 0;
2119}
2120
bd788c96
AH		 2121static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2122{
1a258db6
AW		 2123 int ret;
2124 struct mmc_blk_data *md = mq->data;
2125 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2126 struct mmc_host *host = card->host;
2127 unsigned long flags;
f662ae48 2128 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2129
ee8a43a5
PF		 2130 if (req && !mq->mqrq_prev->req)
2131 /* claim host only for the first request */
e94cfef6 2132 mmc_get_card(card);
ee8a43a5 2133
371a689f
AW		 2134 ret = mmc_blk_part_switch(card, md);
2135 if (ret) {
0d7d85ca 2136 if (req) {
ecf8b5d0 2137 blk_end_request_all(req, -EIO);
0d7d85ca 2138 }
371a689f
AW		 2139 ret = 0;
2140 goto out;
2141 }
1a258db6 2142
2220eedf 2143 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2144 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2145 /* complete ongoing async transfer before issuing discard */
2146 if (card->host->areq)
2147 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2148 if (req->cmd_flags & REQ_SECURE)
1a258db6 2149 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2150 else
1a258db6 2151 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2152 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2153 /* complete ongoing async transfer before issuing flush */
2154 if (card->host->areq)
2155 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2156 ret = mmc_blk_issue_flush(mq, req);
49804548 2157 } else {
2220eedf
KD		 2158 if (!req && host->areq) {
2159 spin_lock_irqsave(&host->context_info.lock, flags);
2160 host->context_info.is_waiting_last_req = true;
2161 spin_unlock_irqrestore(&host->context_info.lock, flags);
2162 }
1a258db6 2163 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2164 }
1a258db6 2165
371a689f 2166out:
ef3a69c7 2167 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2168 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2169 /*
2170 * Release host when there are no more requests
2171 * and after special request(discard, flush) is done.
2172 * In case sepecial request, there is no reentry to
2173 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2174 */
e94cfef6 2175 mmc_put_card(card);
1a258db6 2176 return ret;
bd788c96 2177}
1da177e4 2178
a6f6c96b
RK		 2179static inline int mmc_blk_readonly(struct mmc_card *card)
2180{
2181 return mmc_card_readonly(card) ||
2182 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2183}
2184
371a689f
AW		 2185static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2186 struct device *parent,
2187 sector_t size,
2188 bool default_ro,
add710ea
JR		 2189 const char *subname,
2190 int area_type)
1da177e4
LT		 2191{
2192 struct mmc_blk_data *md;
2193 int devidx, ret;
2194
b10fa99e
UH		 2195again:
2196 if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2197 return ERR_PTR(-ENOMEM);
2198
2199 spin_lock(&mmc_blk_lock);
2200 ret = ida_get_new(&mmc_blk_ida, &devidx);
2201 spin_unlock(&mmc_blk_lock);
2202
2203 if (ret == -EAGAIN)
2204 goto again;
2205 else if (ret)
2206 return ERR_PTR(ret);
2207
2208 if (devidx >= max_devices) {
2209 ret = -ENOSPC;
2210 goto out;
2211 }
1da177e4 2212
dd00cc48 2213 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2214 if (!md) {
2215 ret = -ENOMEM;
2216 goto out;
2217 }
1da177e4 2218
add710ea
JR		 2219 md->area_type = area_type;
2220
a6f6c96b
RK		 2221 /*
2222 * Set the read-only status based on the supported commands
2223 * and the write protect switch.
2224 */
2225 md->read_only = mmc_blk_readonly(card);
1da177e4 2226
5e71b7a6 2227 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2228 if (md->disk == NULL) {
2229 ret = -ENOMEM;
2230 goto err_kfree;
2231 }
1da177e4 2232
a6f6c96b 2233 spin_lock_init(&md->lock);
371a689f 2234 INIT_LIST_HEAD(&md->part);
a6f6c96b 2235 md->usage = 1;
1da177e4 2236
d09408ad 2237 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2238 if (ret)
2239 goto err_putdisk;
1da177e4 2240
a6f6c96b
RK		 2241 md->queue.issue_fn = mmc_blk_issue_rq;
2242 md->queue.data = md;
d2b18394 2243
fe6b4c88 2244 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2245 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2246 md->disk->fops = &mmc_bdops;
2247 md->disk->private_data = md;
2248 md->disk->queue = md->queue.queue;
371a689f
AW		 2249 md->disk->driverfs_dev = parent;
2250 set_disk_ro(md->disk, md->read_only || default_ro);
382c55f8 2251 md->disk->flags = GENHD_FL_EXT_DEVT;
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),
9aaf3437 2268 "mmcblk%u%s", card->host->index, 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:
b10fa99e
UH		 2308 spin_lock(&mmc_blk_lock);
2309 ida_remove(&mmc_blk_ida, devidx);
2310 spin_unlock(&mmc_blk_lock);
371a689f
AW		 2311 return ERR_PTR(ret);
2312}
2313
2314static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2315{
2316 sector_t size;
a6f6c96b 2317
85a18ad9
PO		 2318 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2319 /*
2320 * The EXT_CSD sector count is in number or 512 byte
2321 * sectors.
2322 */
371a689f 2323 size = card->ext_csd.sectors;
85a18ad9
PO		 2324 } else {
2325 /*
2326 * The CSD capacity field is in units of read_blkbits.
2327 * set_capacity takes units of 512 bytes.
2328 */
087de9ed
KM		 2329 size = (typeof(sector_t))card->csd.capacity
2330 << (card->csd.read_blkbits - 9);
85a18ad9 2331 }
371a689f 2332
7a30f2af 2333 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2334 MMC_BLK_DATA_AREA_MAIN);
371a689f 2335}
a6f6c96b 2336
371a689f
AW		 2337static int mmc_blk_alloc_part(struct mmc_card *card,
2338 struct mmc_blk_data *md,
2339 unsigned int part_type,
2340 sector_t size,
2341 bool default_ro,
add710ea
JR		 2342 const char *subname,
2343 int area_type)
371a689f
AW		 2344{
2345 char cap_str[10];
2346 struct mmc_blk_data *part_md;
2347
2348 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2349 subname, area_type);
371a689f
AW		 2350 if (IS_ERR(part_md))
2351 return PTR_ERR(part_md);
2352 part_md->part_type = part_type;
2353 list_add(&part_md->part, &md->part);
2354
b9f28d86 2355 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2356 cap_str, sizeof(cap_str));
a3c76eb9 2357 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2358 part_md->disk->disk_name, mmc_card_id(card),
2359 mmc_card_name(card), part_md->part_type, cap_str);
2360 return 0;
2361}
2362
e0c368d5
NJ		 2363/* MMC Physical partitions consist of two boot partitions and
2364 * up to four general purpose partitions.
2365 * For each partition enabled in EXT_CSD a block device will be allocatedi
2366 * to provide access to the partition.
2367 */
2368
371a689f
AW		 2369static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2370{
e0c368d5 2371 int idx, ret = 0;
371a689f
AW		 2372
2373 if (!mmc_card_mmc(card))
2374 return 0;
2375
e0c368d5
NJ		 2376 for (idx = 0; idx < card->nr_parts; idx++) {
2377 if (card->part[idx].size) {
2378 ret = mmc_blk_alloc_part(card, md,
2379 card->part[idx].part_cfg,
2380 card->part[idx].size >> 9,
2381 card->part[idx].force_ro,
add710ea
JR		 2382 card->part[idx].name,
2383 card->part[idx].area_type);
e0c368d5
NJ		 2384 if (ret)
2385 return ret;
2386 }
371a689f
AW		 2387 }
2388
2389 return ret;
1da177e4
LT		 2390}
2391
371a689f
AW		 2392static void mmc_blk_remove_req(struct mmc_blk_data *md)
2393{
add710ea
JR		 2394 struct mmc_card *card;
2395
371a689f 2396 if (md) {
fdfa20c1
PT		 2397 /*
2398 * Flush remaining requests and free queues. It
2399 * is freeing the queue that stops new requests
2400 * from being accepted.
2401 */
8efb83a2 2402 card = md->queue.card;
fdfa20c1
PT		 2403 mmc_cleanup_queue(&md->queue);
2404 if (md->flags & MMC_BLK_PACKED_CMD)
2405 mmc_packed_clean(&md->queue);
371a689f
AW		 2406 if (md->disk->flags & GENHD_FL_UP) {
2407 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2408 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2409 card->ext_csd.boot_ro_lockable)
2410 device_remove_file(disk_to_dev(md->disk),
2411 &md->power_ro_lock);
371a689f 2412
371a689f
AW		 2413 del_gendisk(md->disk);
2414 }
371a689f
AW		 2415 mmc_blk_put(md);
2416 }
2417}
2418
2419static void mmc_blk_remove_parts(struct mmc_card *card,
2420 struct mmc_blk_data *md)
2421{
2422 struct list_head *pos, *q;
2423 struct mmc_blk_data *part_md;
2424
2425 list_for_each_safe(pos, q, &md->part) {
2426 part_md = list_entry(pos, struct mmc_blk_data, part);
2427 list_del(pos);
2428 mmc_blk_remove_req(part_md);
2429 }
2430}
2431
2432static int mmc_add_disk(struct mmc_blk_data *md)
2433{
2434 int ret;
add710ea 2435 struct mmc_card *card = md->queue.card;
371a689f
AW		 2436
2437 add_disk(md->disk);
2438 md->force_ro.show = force_ro_show;
2439 md->force_ro.store = force_ro_store;
641c3187 2440 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2441 md->force_ro.attr.name = "force_ro";
2442 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2443 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2444 if (ret)
add710ea
JR		 2445 goto force_ro_fail;
2446
2447 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2448 card->ext_csd.boot_ro_lockable) {
88187398 2449 umode_t mode;
add710ea
JR		 2450
2451 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2452 mode = S_IRUGO;
2453 else
2454 mode = S_IRUGO | S_IWUSR;
2455
2456 md->power_ro_lock.show = power_ro_lock_show;
2457 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2458 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2459 md->power_ro_lock.attr.mode = mode;
2460 md->power_ro_lock.attr.name =
2461 "ro_lock_until_next_power_on";
2462 ret = device_create_file(disk_to_dev(md->disk),
2463 &md->power_ro_lock);
2464 if (ret)
2465 goto power_ro_lock_fail;
2466 }
2467 return ret;
2468
2469power_ro_lock_fail:
2470 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2471force_ro_fail:
2472 del_gendisk(md->disk);
371a689f
AW		 2473
2474 return ret;
2475}
2476
c59d4473
CB		 2477#define CID_MANFID_SANDISK 0x2
2478#define CID_MANFID_TOSHIBA 0x11
2479#define CID_MANFID_MICRON 0x13
3550ccdb 2480#define CID_MANFID_SAMSUNG 0x15
b5b4ff0a 2481#define CID_MANFID_KINGSTON 0x70
c59d4473 2482
6f60c222
AW		 2483static const struct mmc_fixup blk_fixups[] =
2484{
c59d4473
CB		 2485 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2486 MMC_QUIRK_INAND_CMD38),
2487 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488 MMC_QUIRK_INAND_CMD38),
2489 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490 MMC_QUIRK_INAND_CMD38),
2491 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2492 MMC_QUIRK_INAND_CMD38),
2493 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2494 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2495
2496 /*
2497 * Some MMC cards experience performance degradation with CMD23
2498 * instead of CMD12-bounded multiblock transfers. For now we'll
2499 * black list what's bad...
2500 * - Certain Toshiba cards.
2501 *
2502 * N.B. This doesn't affect SD cards.
2503 */
7d70d476
YL		 2504 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2505 MMC_QUIRK_BLK_NO_CMD23),
2506 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2507 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2508 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2509 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2510 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2511 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2512 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2513 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2514
2515 /*
2516 * Some Micron MMC cards needs longer data read timeout than
2517 * indicated in CSD.
2518 */
c59d4473 2519 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2520 MMC_QUIRK_LONG_READ_TIME),
2521
3550ccdb
IC		 2522 /*
2523 * On these Samsung MoviNAND parts, performing secure erase or
2524 * secure trim can result in unrecoverable corruption due to a
2525 * firmware bug.
2526 */
2527 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2529 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2531 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2532 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2533 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2534 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2535 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2536 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2537 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2538 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2539 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2540 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2541 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2542 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2543
b5b4ff0a
SL		 2544 /*
2545 * On Some Kingston eMMCs, performing trim can result in
2546 * unrecoverable data conrruption occasionally due to a firmware bug.
2547 */
2548 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2549 MMC_QUIRK_TRIM_BROKEN),
2550 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2551 MMC_QUIRK_TRIM_BROKEN),
2552
6f60c222
AW		 2553 END_FIXUP
2554};
2555
96541bac 2556static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2557{
371a689f 2558 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2559 char cap_str[10];
2560
912490db
PO		 2561 /*
2562 * Check that the card supports the command class(es) we need.
2563 */
2564 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2565 return -ENODEV;
2566
5204d00f
LC		 2567 mmc_fixup_device(card, blk_fixups);
2568
1da177e4
LT		 2569 md = mmc_blk_alloc(card);
2570 if (IS_ERR(md))
2571 return PTR_ERR(md);
2572
b9f28d86 2573 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2574 cap_str, sizeof(cap_str));
a3c76eb9 2575 pr_info("%s: %s %s %s %s\n",
1da177e4 2576 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2577 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2578
371a689f
AW		 2579 if (mmc_blk_alloc_parts(card, md))
2580 goto out;
2581
96541bac 2582 dev_set_drvdata(&card->dev, md);
6f60c222 2583
371a689f
AW		 2584 if (mmc_add_disk(md))
2585 goto out;
2586
2587 list_for_each_entry(part_md, &md->part, part) {
2588 if (mmc_add_disk(part_md))
2589 goto out;
2590 }
e94cfef6
UH		 2591
2592 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2593 pm_runtime_use_autosuspend(&card->dev);
2594
2595 /*
2596 * Don't enable runtime PM for SD-combo cards here. Leave that
2597 * decision to be taken during the SDIO init sequence instead.
2598 */
2599 if (card->type != MMC_TYPE_SD_COMBO) {
2600 pm_runtime_set_active(&card->dev);
2601 pm_runtime_enable(&card->dev);
2602 }
2603
1da177e4
LT		 2604 return 0;
2605
2606 out:
371a689f
AW		 2607 mmc_blk_remove_parts(card, md);
2608 mmc_blk_remove_req(md);
5865f287 2609 return 0;
1da177e4
LT		 2610}
2611
96541bac 2612static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2613{
96541bac 2614 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2615
371a689f 2616 mmc_blk_remove_parts(card, md);
e94cfef6 2617 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2618 mmc_claim_host(card->host);
2619 mmc_blk_part_switch(card, md);
2620 mmc_release_host(card->host);
e94cfef6
UH		 2621 if (card->type != MMC_TYPE_SD_COMBO)
2622 pm_runtime_disable(&card->dev);
2623 pm_runtime_put_noidle(&card->dev);
371a689f 2624 mmc_blk_remove_req(md);
96541bac 2625 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2626}
2627
96541bac 2628static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2629{
371a689f 2630 struct mmc_blk_data *part_md;
96541bac 2631 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2632
2633 if (md) {
2634 mmc_queue_suspend(&md->queue);
371a689f
AW		 2635 list_for_each_entry(part_md, &md->part, part) {
2636 mmc_queue_suspend(&part_md->queue);
2637 }
1da177e4
LT		 2638 }
2639 return 0;
2640}
2641
96541bac 2642static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2643{
96541bac 2644 _mmc_blk_suspend(card);
76287748
UH		 2645}
2646
0967edc6
UH		 2647#ifdef CONFIG_PM_SLEEP
2648static int mmc_blk_suspend(struct device *dev)
76287748 2649{
96541bac
UH		 2650 struct mmc_card *card = mmc_dev_to_card(dev);
2651
2652 return _mmc_blk_suspend(card);
76287748
UH		 2653}
2654
0967edc6 2655static int mmc_blk_resume(struct device *dev)
1da177e4 2656{
371a689f 2657 struct mmc_blk_data *part_md;
fc95e30b 2658 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2659
2660 if (md) {
371a689f
AW		 2661 /*
2662 * Resume involves the card going into idle state,
2663 * so current partition is always the main one.
2664 */
2665 md->part_curr = md->part_type;
1da177e4 2666 mmc_queue_resume(&md->queue);
371a689f
AW		 2667 list_for_each_entry(part_md, &md->part, part) {
2668 mmc_queue_resume(&part_md->queue);
2669 }
1da177e4
LT		 2670 }
2671 return 0;
2672}
1da177e4
LT		 2673#endif
2674
0967edc6
UH		 2675static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2676
96541bac
UH		 2677static struct mmc_driver mmc_driver = {
2678 .drv = {
2679 .name = "mmcblk",
2680 .pm = &mmc_blk_pm_ops,
2681 },
1da177e4
LT		 2682 .probe = mmc_blk_probe,
2683 .remove = mmc_blk_remove,
76287748 2684 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2685};
2686
2687static int __init mmc_blk_init(void)
2688{
9d4e98e9 2689 int res;
1da177e4 2690
5e71b7a6
OJ		 2691 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2692 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2693
a26eba61 2694 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2695
fe6b4c88
PO		 2696 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2697 if (res)
1da177e4 2698 goto out;
1da177e4 2699
9d4e98e9
AM		 2700 res = mmc_register_driver(&mmc_driver);
2701 if (res)
2702 goto out2;
1da177e4 2703
9d4e98e9
AM		 2704 return 0;
2705 out2:
2706 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2707 out:
2708 return res;
2709}
2710
2711static void __exit mmc_blk_exit(void)
2712{
2713 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2714 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2715}
2716
2717module_init(mmc_blk_init);
2718module_exit(mmc_blk_exit);
2719
2720MODULE_LICENSE("GPL");
2721MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2722
Linux kernel - Deliverables
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