projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'soundwire-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
[linux-block.git] / drivers / mmc / core / block.c
CommitLineData
7c45b226 1// SPDX-License-Identifier: GPL-2.0
1da177e4
LT		 2/*
3 * Block driver for media (i.e., flash cards)
4 *
5 * Copyright 2002 Hewlett-Packard Company
979ce720 6 * Copyright 2005-2008 Pierre Ossman
1da177e4
LT		 7 *
8 * Use consistent with the GNU GPL is permitted,
9 * provided that this copyright notice is
10 * preserved in its entirety in all copies and derived works.
11 *
12 * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
13 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
14 * FITNESS FOR ANY PARTICULAR PURPOSE.
15 *
16 * Many thanks to Alessandro Rubini and Jonathan Corbet!
17 *
18 * Author: Andrew Christian
19 * 28 May 2002
20 */
21#include <linux/moduleparam.h>
22#include <linux/module.h>
23#include <linux/init.h>
24
1da177e4
LT		 25#include <linux/kernel.h>
26#include <linux/fs.h>
5a0e3ad6 27#include <linux/slab.h>
1da177e4
LT		 28#include <linux/errno.h>
29#include <linux/hdreg.h>
30#include <linux/kdev_t.h>
edb25572 31#include <linux/kref.h>
1da177e4 32#include <linux/blkdev.h>
97548575 33#include <linux/cdev.h>
a621aaed 34#include <linux/mutex.h>
ec5a19dd 35#include <linux/scatterlist.h>
a7bbb573 36#include <linux/string_helpers.h>
cb87ea28
JC		 37#include <linux/delay.h>
38#include <linux/capability.h>
39#include <linux/compat.h>
e94cfef6 40#include <linux/pm_runtime.h>
b10fa99e 41#include <linux/idr.h>
627c3ccf 42#include <linux/debugfs.h>
1da177e4 43
cb87ea28 44#include <linux/mmc/ioctl.h>
1da177e4 45#include <linux/mmc/card.h>
385e3227 46#include <linux/mmc/host.h>
da7fbe58
PO		 47#include <linux/mmc/mmc.h>
48#include <linux/mmc/sd.h>
1da177e4 49
7c0f6ba6 50#include <linux/uaccess.h>
1da177e4 51
98ac2162 52#include "queue.h"
48ab086d 53#include "block.h"
55244c56 54#include "core.h"
4facdde1 55#include "card.h"
93f1c150 56#include "crypto.h"
5857b29b 57#include "host.h"
4facdde1 58#include "bus.h"
55244c56 59#include "mmc_ops.h"
28fc64af 60#include "quirks.h"
55244c56 61#include "sd_ops.h"
1da177e4 62
6b0b6285 63MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 64#ifdef MODULE_PARAM_PREFIX
65#undef MODULE_PARAM_PREFIX
66#endif
67#define MODULE_PARAM_PREFIX "mmcblk."
68
6b7a363d
AH		 69/*
70 * Set a 10 second timeout for polling write request busy state. Note, mmc core
71 * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10
72 * second software timer to timeout the whole request, so 10 seconds should be
73 * ample.
74 */
75#define MMC_BLK_TIMEOUT_MS (10 * 1000)
775a9362 76#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
a0e95766 77#define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
6a7a6b45 78
5e71b7a6 79static DEFINE_MUTEX(block_mutex);
6b0b6285 80
1da177e4 81/*
5e71b7a6
OJ		 82 * The defaults come from config options but can be overriden by module
83 * or bootarg options.
1da177e4 84 */
5e71b7a6 85static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
1dff3144 86
5e71b7a6
OJ		 87/*
88 * We've only got one major, so number of mmcblk devices is
a26eba61 89 * limited to (1 << 20) / number of minors per device. It is also
b10fa99e 90 * limited by the MAX_DEVICES below.
5e71b7a6
OJ		 91 */
92static int max_devices;
93
a26eba61
BH		 94#define MAX_DEVICES 256
95
b10fa99e 96static DEFINE_IDA(mmc_blk_ida);
97548575 97static DEFINE_IDA(mmc_rpmb_ida);
1da177e4 98
6966e609
UH		 99struct mmc_blk_busy_data {
100 struct mmc_card *card;
101 u32 status;
102};
103
1da177e4
LT		 104/*
105 * There is one mmc_blk_data per slot.
106 */
107struct mmc_blk_data {
307d8e6f 108 struct device *parent;
1da177e4
LT		 109 struct gendisk *disk;
110 struct mmc_queue queue;
371a689f 111 struct list_head part;
97548575 112 struct list_head rpmbs;
1da177e4 113
d0c97cfb
AW		 114 unsigned int flags;
115#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
116#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
117
edb25572 118 struct kref kref;
a6f6c96b 119 unsigned int read_only;
371a689f 120 unsigned int part_type;
67716327
AH		 121 unsigned int reset_done;
122#define MMC_BLK_READ BIT(0)
123#define MMC_BLK_WRITE BIT(1)
124#define MMC_BLK_DISCARD BIT(2)
125#define MMC_BLK_SECDISCARD BIT(3)
1e8e55b6 126#define MMC_BLK_CQE_RECOVERY BIT(4)
f7b6fc32 127#define MMC_BLK_TRIM BIT(5)
371a689f
AW		 128
129 /*
130 * Only set in main mmc_blk_data associated
fc95e30b 131 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 132 * track of the current selected device partition.
133 */
134 unsigned int part_curr;
406e1480 135#define MMC_BLK_PART_INVALID UINT_MAX /* Unknown partition active */
add710ea 136 int area_type;
f9f0da98
AH		 137
138 /* debugfs files (only in main mmc_blk_data) */
139 struct dentry *status_dentry;
140 struct dentry *ext_csd_dentry;
1da177e4
LT		 141};
142
97548575
LW		 143/* Device type for RPMB character devices */
144static dev_t mmc_rpmb_devt;
145
146/* Bus type for RPMB character devices */
147static struct bus_type mmc_rpmb_bus_type = {
148 .name = "mmc_rpmb",
149};
150
151/**
152 * struct mmc_rpmb_data - special RPMB device type for these areas
153 * @dev: the device for the RPMB area
154 * @chrdev: character device for the RPMB area
155 * @id: unique device ID number
156 * @part_index: partition index (0 on first)
157 * @md: parent MMC block device
158 * @node: list item, so we can put this device on a list
159 */
160struct mmc_rpmb_data {
161 struct device dev;
162 struct cdev chrdev;
163 int id;
164 unsigned int part_index;
165 struct mmc_blk_data *md;
166 struct list_head node;
167};
168
a621aaed 169static DEFINE_MUTEX(open_lock);
1da177e4 170
5e71b7a6
OJ		 171module_param(perdev_minors, int, 0444);
172MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
173
8d1e977d 174static inline int mmc_blk_part_switch(struct mmc_card *card,
1f797edc 175 unsigned int part_type);
511ce378
BW		 176static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
177 struct mmc_card *card,
b3fa3e6d 178 int recovery_mode,
511ce378
BW		 179 struct mmc_queue *mq);
180static void mmc_blk_hsq_req_done(struct mmc_request *mrq);
568898cb 181static int mmc_spi_err_check(struct mmc_card *card);
f19c5a73 182static int mmc_blk_busy_cb(void *cb_data, bool *busy);
cdf8a6fb 183
1da177e4
LT		 184static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
185{
186 struct mmc_blk_data *md;
187
a621aaed 188 mutex_lock(&open_lock);
1da177e4 189 md = disk->private_data;
edb25572 190 if (md && !kref_get_unless_zero(&md->kref))
1da177e4 191 md = NULL;
a621aaed 192 mutex_unlock(&open_lock);
1da177e4
LT		 193
194 return md;
195}
196
371a689f
AW		 197static inline int mmc_get_devidx(struct gendisk *disk)
198{
382c55f8 199 int devidx = disk->first_minor / perdev_minors;
371a689f
AW		 200 return devidx;
201}
202
edb25572 203static void mmc_blk_kref_release(struct kref *ref)
1da177e4 204{
edb25572
SB		 205 struct mmc_blk_data *md = container_of(ref, struct mmc_blk_data, kref);
206 int devidx;
249cda33 207
edb25572
SB		 208 devidx = mmc_get_devidx(md->disk);
209 ida_simple_remove(&mmc_blk_ida, devidx);
210
211 mutex_lock(&open_lock);
212 md->disk->private_data = NULL;
a621aaed 213 mutex_unlock(&open_lock);
edb25572
SB		 214
215 put_disk(md->disk);
216 kfree(md);
217}
218
219static void mmc_blk_put(struct mmc_blk_data *md)
220{
221 kref_put(&md->kref, mmc_blk_kref_release);
1da177e4
LT		 222}
223
add710ea
JR		 224static ssize_t power_ro_lock_show(struct device *dev,
225 struct device_attribute *attr, char *buf)
226{
227 int ret;
228 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
229 struct mmc_card *card = md->queue.card;
230 int locked = 0;
231
232 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
233 locked = 2;
234 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
235 locked = 1;
236
237 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
238
9098f84c
TW		 239 mmc_blk_put(md);
240
add710ea
JR		 241 return ret;
242}
243
244static ssize_t power_ro_lock_store(struct device *dev,
245 struct device_attribute *attr, const char *buf, size_t count)
246{
247 int ret;
248 struct mmc_blk_data *md, *part_md;
0493f6fe
LW		 249 struct mmc_queue *mq;
250 struct request *req;
add710ea
JR		 251 unsigned long set;
252
253 if (kstrtoul(buf, 0, &set))
254 return -EINVAL;
255
256 if (set != 1)
257 return count;
258
259 md = mmc_blk_get(dev_to_disk(dev));
0493f6fe 260 mq = &md->queue;
add710ea 261
0493f6fe 262 /* Dispatch locking to the block layer */
0bf6d96c 263 req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_OUT, 0);
fb8e456e
AH		 264 if (IS_ERR(req)) {
265 count = PTR_ERR(req);
266 goto out_put;
267 }
0493f6fe 268 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
003fb0a5 269 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
b84ba30b 270 blk_execute_rq(req, false);
0493f6fe 271 ret = req_to_mmc_queue_req(req)->drv_op_result;
0bf6d96c 272 blk_mq_free_request(req);
add710ea
JR		 273
274 if (!ret) {
275 pr_info("%s: Locking boot partition ro until next power on\n",
276 md->disk->disk_name);
277 set_disk_ro(md->disk, 1);
278
279 list_for_each_entry(part_md, &md->part, part)
280 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
281 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
282 set_disk_ro(part_md->disk, 1);
283 }
284 }
fb8e456e 285out_put:
add710ea
JR		 286 mmc_blk_put(md);
287 return count;
288}
289
29e6a5e0
CH		 290static DEVICE_ATTR(ro_lock_until_next_power_on, 0,
291 power_ro_lock_show, power_ro_lock_store);
292
371a689f
AW		 293static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
294 char *buf)
295{
296 int ret;
297 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
298
0031a98a 299 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 300 get_disk_ro(dev_to_disk(dev)) ^
301 md->read_only);
302 mmc_blk_put(md);
303 return ret;
304}
305
306static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
307 const char *buf, size_t count)
308{
309 int ret;
310 char *end;
311 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
312 unsigned long set = simple_strtoul(buf, &end, 0);
313 if (end == buf) {
314 ret = -EINVAL;
315 goto out;
316 }
317
318 set_disk_ro(dev_to_disk(dev), set || md->read_only);
319 ret = count;
320out:
321 mmc_blk_put(md);
322 return ret;
323}
324
29e6a5e0
CH		 325static DEVICE_ATTR(force_ro, 0644, force_ro_show, force_ro_store);
326
327static struct attribute *mmc_disk_attrs[] = {
328 &dev_attr_force_ro.attr,
329 &dev_attr_ro_lock_until_next_power_on.attr,
330 NULL,
331};
332
333static umode_t mmc_disk_attrs_is_visible(struct kobject *kobj,
334 struct attribute *a, int n)
335{
0e8bb666 336 struct device *dev = kobj_to_dev(kobj);
29e6a5e0
CH		 337 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
338 umode_t mode = a->mode;
339
340 if (a == &dev_attr_ro_lock_until_next_power_on.attr &&
341 (md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
342 md->queue.card->ext_csd.boot_ro_lockable) {
343 mode = S_IRUGO;
344 if (!(md->queue.card->ext_csd.boot_ro_lock &
345 EXT_CSD_BOOT_WP_B_PWR_WP_DIS))
346 mode |= S_IWUSR;
347 }
348
349 mmc_blk_put(md);
350 return mode;
351}
352
353static const struct attribute_group mmc_disk_attr_group = {
354 .is_visible = mmc_disk_attrs_is_visible,
355 .attrs = mmc_disk_attrs,
356};
357
358static const struct attribute_group *mmc_disk_attr_groups[] = {
359 &mmc_disk_attr_group,
360 NULL,
361};
362
05bdb996 363static int mmc_blk_open(struct gendisk *disk, blk_mode_t mode)
1da177e4 364{
d32e2bf8 365 struct mmc_blk_data *md = mmc_blk_get(disk);
1da177e4
LT		 366 int ret = -ENXIO;
367
2a48fc0a 368 mutex_lock(&block_mutex);
1da177e4 369 if (md) {
1da177e4 370 ret = 0;
05bdb996 371 if ((mode & BLK_OPEN_WRITE) && md->read_only) {
70bb0896 372 mmc_blk_put(md);
a00fc090 373 ret = -EROFS;
70bb0896 374 }
1da177e4 375 }
2a48fc0a 376 mutex_unlock(&block_mutex);
1da177e4
LT		 377
378 return ret;
379}
380
ae220766 381static void mmc_blk_release(struct gendisk *disk)
1da177e4 382{
a5a1561f 383 struct mmc_blk_data *md = disk->private_data;
1da177e4 384
2a48fc0a 385 mutex_lock(&block_mutex);
1da177e4 386 mmc_blk_put(md);
2a48fc0a 387 mutex_unlock(&block_mutex);
1da177e4
LT		 388}
389
390static int
a885c8c4 391mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 392{
a885c8c4
CH		 393 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
394 geo->heads = 4;
395 geo->sectors = 16;
396 return 0;
1da177e4
LT		 397}
398
cb87ea28
JC		 399struct mmc_blk_ioc_data {
400 struct mmc_ioc_cmd ic;
401 unsigned char *buf;
402 u64 buf_bytes;
97548575 403 struct mmc_rpmb_data *rpmb;
cb87ea28
JC		 404};
405
406static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
407 struct mmc_ioc_cmd __user *user)
408{
409 struct mmc_blk_ioc_data *idata;
410 int err;
411
1ff8950c 412 idata = kmalloc(sizeof(*idata), GFP_KERNEL);
cb87ea28
JC		 413 if (!idata) {
414 err = -ENOMEM;
aea253ec 415 goto out;
cb87ea28
JC		 416 }
417
418 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
419 err = -EFAULT;
aea253ec 420 goto idata_err;
cb87ea28
JC		 421 }
422
423 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
424 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
425 err = -EOVERFLOW;
aea253ec 426 goto idata_err;
cb87ea28
JC		 427 }
428
bfe5b1b1
VV		 429 if (!idata->buf_bytes) {
430 idata->buf = NULL;
4d6144de 431 return idata;
bfe5b1b1 432 }
4d6144de 433
97a0c313
ME		 434 idata->buf = memdup_user((void __user *)(unsigned long)
435 idata->ic.data_ptr, idata->buf_bytes);
436 if (IS_ERR(idata->buf)) {
437 err = PTR_ERR(idata->buf);
aea253ec 438 goto idata_err;
cb87ea28
JC		 439 }
440
cb87ea28
JC		 441 return idata;
442
aea253ec 443idata_err:
cb87ea28 444 kfree(idata);
aea253ec 445out:
cb87ea28 446 return ERR_PTR(err);
cb87ea28
JC		 447}
448
a5f5774c
JH		 449static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
450 struct mmc_blk_ioc_data *idata)
451{
452 struct mmc_ioc_cmd *ic = &idata->ic;
453
454 if (copy_to_user(&(ic_ptr->response), ic->response,
455 sizeof(ic->response)))
456 return -EFAULT;
457
458 if (!idata->ic.write_flag) {
459 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
460 idata->buf, idata->buf_bytes))
461 return -EFAULT;
462 }
463
464 return 0;
465}
466
a5f5774c
JH		 467static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
468 struct mmc_blk_ioc_data *idata)
cb87ea28 469{
a44f7cb9 470 struct mmc_command cmd = {}, sbc = {};
c7836d15
MY		 471 struct mmc_data data = {};
472 struct mmc_request mrq = {};
cb87ea28 473 struct scatterlist sg;
f19c5a73 474 bool r1b_resp;
51f5b305 475 unsigned int busy_timeout_ms;
cb87ea28 476 int err;
97548575 477 unsigned int target_part;
cb87ea28 478
a5f5774c
JH		 479 if (!card || !md || !idata)
480 return -EINVAL;
cb87ea28 481
97548575
LW		 482 /*
483 * The RPMB accesses comes in from the character device, so we
484 * need to target these explicitly. Else we just target the
485 * partition type for the block device the ioctl() was issued
486 * on.
487 */
488 if (idata->rpmb) {
489 /* Support multiple RPMB partitions */
490 target_part = idata->rpmb->part_index;
491 target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
492 } else {
493 target_part = md->part_type;
494 }
8d1e977d 495
4d6144de
JR		 496 cmd.opcode = idata->ic.opcode;
497 cmd.arg = idata->ic.arg;
498 cmd.flags = idata->ic.flags;
499
500 if (idata->buf_bytes) {
501 data.sg = &sg;
502 data.sg_len = 1;
503 data.blksz = idata->ic.blksz;
504 data.blocks = idata->ic.blocks;
505
506 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
507
508 if (idata->ic.write_flag)
509 data.flags = MMC_DATA_WRITE;
510 else
511 data.flags = MMC_DATA_READ;
512
513 /* data.flags must already be set before doing this. */
514 mmc_set_data_timeout(&data, card);
515
516 /* Allow overriding the timeout_ns for empirical tuning. */
517 if (idata->ic.data_timeout_ns)
518 data.timeout_ns = idata->ic.data_timeout_ns;
519
4d6144de
JR		 520 mrq.data = &data;
521 }
522
523 mrq.cmd = &cmd;
524
97548575 525 err = mmc_blk_part_switch(card, target_part);
8d1e977d 526 if (err)
a5f5774c 527 return err;
8d1e977d 528
cb87ea28
JC		 529 if (idata->ic.is_acmd) {
530 err = mmc_app_cmd(card->host, card);
531 if (err)
a5f5774c 532 return err;
cb87ea28
JC		 533 }
534
97548575 535 if (idata->rpmb) {
a44f7cb9
WS		 536 sbc.opcode = MMC_SET_BLOCK_COUNT;
537 /*
538 * We don't do any blockcount validation because the max size
539 * may be increased by a future standard. We just copy the
540 * 'Reliable Write' bit here.
541 */
542 sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31));
543 sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
544 mrq.sbc = &sbc;
8d1e977d
LP		 545 }
546
a82e484e 547 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
55c2b8b9 548 (cmd.opcode == MMC_SWITCH))
4f111d04 549 return mmc_sanitize(card, idata->ic.cmd_timeout_ms);
775a9362 550
51f5b305
UH		 551 /* If it's an R1B response we need some more preparations. */
552 busy_timeout_ms = idata->ic.cmd_timeout_ms ? : MMC_BLK_TIMEOUT_MS;
553 r1b_resp = (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B;
554 if (r1b_resp)
f19c5a73 555 mmc_prepare_busy_cmd(card->host, &cmd, busy_timeout_ms);
51f5b305 556
cb87ea28 557 mmc_wait_for_req(card->host, &mrq);
e72a55f2 558 memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp));
cb87ea28
JC		 559
560 if (cmd.error) {
561 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
562 __func__, cmd.error);
a5f5774c 563 return cmd.error;
cb87ea28
JC		 564 }
565 if (data.error) {
566 dev_err(mmc_dev(card->host), "%s: data error %d\n",
567 __func__, data.error);
a5f5774c 568 return data.error;
cb87ea28
JC		 569 }
570
a0e95766
BS		 571 /*
572 * Make sure the cache of the PARTITION_CONFIG register and
573 * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write
574 * changed it successfully.
575 */
576 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
577 (cmd.opcode == MMC_SWITCH)) {
578 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
579 u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg);
580
581 /*
582 * Update cache so the next mmc_blk_part_switch call operates
583 * on up-to-date data.
584 */
585 card->ext_csd.part_config = value;
586 main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK;
587 }
588
aea0440a
AA		 589 /*
590 * Make sure to update CACHE_CTRL in case it was changed. The cache
591 * will get turned back on if the card is re-initialized, e.g.
592 * suspend/resume or hw reset in recovery.
593 */
594 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) &&
595 (cmd.opcode == MMC_SWITCH)) {
596 u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1;
597
598 card->ext_csd.cache_ctrl = value;
599 }
600
cb87ea28
JC		 601 /*
602 * According to the SD specs, some commands require a delay after
603 * issuing the command.
604 */
605 if (idata->ic.postsleep_min_us)
606 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
607
568898cb
CL		 608 if (mmc_host_is_spi(card->host)) {
609 if (idata->ic.write_flag || r1b_resp || cmd.flags & MMC_RSP_SPI_BUSY)
610 return mmc_spi_err_check(card);
611 return err;
612 }
f19c5a73
UH		 613
614 /*
615 * Ensure RPMB, writes and R1B responses are completed by polling with
616 * CMD13. Note that, usually we don't need to poll when using HW busy
617 * detection, but here it's needed since some commands may indicate the
618 * error through the R1 status bits.
619 */
620 if (idata->rpmb || idata->ic.write_flag || r1b_resp) {
621 struct mmc_blk_busy_data cb_data = {
622 .card = card,
623 };
624
625 err = __mmc_poll_for_busy(card->host, 0, busy_timeout_ms,
626 &mmc_blk_busy_cb, &cb_data);
627
628 idata->ic.response[0] = cb_data.status;
629 }
8d1e977d 630
a5f5774c
JH		 631 return err;
632}
633
2fe20bae 634static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
97548575
LW		 635 struct mmc_ioc_cmd __user *ic_ptr,
636 struct mmc_rpmb_data *rpmb)
a5f5774c
JH		 637{
638 struct mmc_blk_ioc_data *idata;
3ecd8cf2 639 struct mmc_blk_ioc_data *idatas[1];
614f0388 640 struct mmc_queue *mq;
a5f5774c 641 struct mmc_card *card;
b093410c 642 int err = 0, ioc_err = 0;
614f0388 643 struct request *req;
a5f5774c
JH		 644
645 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
646 if (IS_ERR(idata))
647 return PTR_ERR(idata);
97548575
LW		 648 /* This will be NULL on non-RPMB ioctl():s */
649 idata->rpmb = rpmb;
a5f5774c 650
a5f5774c
JH		 651 card = md->queue.card;
652 if (IS_ERR(card)) {
653 err = PTR_ERR(card);
654 goto cmd_done;
655 }
656
614f0388
LW		 657 /*
658 * Dispatch the ioctl() into the block request queue.
659 */
660 mq = &md->queue;
0bf6d96c 661 req = blk_mq_alloc_request(mq->queue,
ff005a06 662 idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
fb8e456e
AH		 663 if (IS_ERR(req)) {
664 err = PTR_ERR(req);
665 goto cmd_done;
666 }
3ecd8cf2 667 idatas[0] = idata;
97548575
LW		 668 req_to_mmc_queue_req(req)->drv_op =
669 rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
003fb0a5 670 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
69f7599e 671 req_to_mmc_queue_req(req)->drv_op_data = idatas;
3ecd8cf2 672 req_to_mmc_queue_req(req)->ioc_count = 1;
b84ba30b 673 blk_execute_rq(req, false);
0493f6fe 674 ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
b093410c 675 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
0bf6d96c 676 blk_mq_free_request(req);
a5f5774c 677
cb87ea28 678cmd_done:
cb87ea28
JC		 679 kfree(idata->buf);
680 kfree(idata);
b093410c 681 return ioc_err ? ioc_err : err;
cb87ea28
JC		 682}
683
2fe20bae 684static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
97548575
LW		 685 struct mmc_ioc_multi_cmd __user *user,
686 struct mmc_rpmb_data *rpmb)
a5f5774c
JH		 687{
688 struct mmc_blk_ioc_data **idata = NULL;
689 struct mmc_ioc_cmd __user *cmds = user->cmds;
690 struct mmc_card *card;
3ecd8cf2 691 struct mmc_queue *mq;
103da066 692 int err = 0, ioc_err = 0;
a5f5774c 693 __u64 num_of_cmds;
103da066 694 unsigned int i, n;
3ecd8cf2 695 struct request *req;
a5f5774c
JH		 696
697 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
698 sizeof(num_of_cmds)))
699 return -EFAULT;
700
aab2ee03
GU		 701 if (!num_of_cmds)
702 return 0;
703
a5f5774c
JH		 704 if (num_of_cmds > MMC_IOC_MAX_CMDS)
705 return -EINVAL;
706
103da066
SS		 707 n = num_of_cmds;
708 idata = kcalloc(n, sizeof(*idata), GFP_KERNEL);
a5f5774c
JH		 709 if (!idata)
710 return -ENOMEM;
711
103da066 712 for (i = 0; i < n; i++) {
a5f5774c
JH		 713 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
714 if (IS_ERR(idata[i])) {
715 err = PTR_ERR(idata[i]);
103da066 716 n = i;
a5f5774c
JH		 717 goto cmd_err;
718 }
97548575
LW		 719 /* This will be NULL on non-RPMB ioctl():s */
720 idata[i]->rpmb = rpmb;
a5f5774c
JH		 721 }
722
a5f5774c
JH		 723 card = md->queue.card;
724 if (IS_ERR(card)) {
725 err = PTR_ERR(card);
2fe20bae 726 goto cmd_err;
a5f5774c
JH		 727 }
728
a5f5774c 729
3ecd8cf2
LW		 730 /*
731 * Dispatch the ioctl()s into the block request queue.
732 */
733 mq = &md->queue;
0bf6d96c 734 req = blk_mq_alloc_request(mq->queue,
ff005a06 735 idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
fb8e456e
AH		 736 if (IS_ERR(req)) {
737 err = PTR_ERR(req);
738 goto cmd_err;
739 }
97548575
LW		 740 req_to_mmc_queue_req(req)->drv_op =
741 rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
003fb0a5 742 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
69f7599e 743 req_to_mmc_queue_req(req)->drv_op_data = idata;
103da066 744 req_to_mmc_queue_req(req)->ioc_count = n;
b84ba30b 745 blk_execute_rq(req, false);
0493f6fe 746 ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
a5f5774c
JH		 747
748 /* copy to user if data and response */
103da066 749 for (i = 0; i < n && !err; i++)
a5f5774c 750 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
a5f5774c 751
0bf6d96c 752 blk_mq_free_request(req);
3ecd8cf2 753
a5f5774c 754cmd_err:
103da066 755 for (i = 0; i < n; i++) {
a5f5774c
JH		 756 kfree(idata[i]->buf);
757 kfree(idata[i]);
758 }
759 kfree(idata);
b093410c 760 return ioc_err ? ioc_err : err;
a5f5774c
JH		 761}
762
61fe0e2b
LW		 763static int mmc_blk_check_blkdev(struct block_device *bdev)
764{
765 /*
766 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
767 * whole block device, not on a partition. This prevents overspray
768 * between sibling partitions.
769 */
fa01b1e9 770 if (!capable(CAP_SYS_RAWIO) || bdev_is_partition(bdev))
61fe0e2b
LW		 771 return -EPERM;
772 return 0;
773}
774
05bdb996 775static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode,
cb87ea28
JC		 776 unsigned int cmd, unsigned long arg)
777{
2fe20bae 778 struct mmc_blk_data *md;
61fe0e2b
LW		 779 int ret;
780
a5f5774c
JH		 781 switch (cmd) {
782 case MMC_IOC_CMD:
61fe0e2b
LW		 783 ret = mmc_blk_check_blkdev(bdev);
784 if (ret)
785 return ret;
2fe20bae
LW		 786 md = mmc_blk_get(bdev->bd_disk);
787 if (!md)
788 return -EINVAL;
789 ret = mmc_blk_ioctl_cmd(md,
97548575
LW		 790 (struct mmc_ioc_cmd __user *)arg,
791 NULL);
2fe20bae
LW		 792 mmc_blk_put(md);
793 return ret;
a5f5774c 794 case MMC_IOC_MULTI_CMD:
61fe0e2b
LW		 795 ret = mmc_blk_check_blkdev(bdev);
796 if (ret)
797 return ret;
2fe20bae
LW		 798 md = mmc_blk_get(bdev->bd_disk);
799 if (!md)
800 return -EINVAL;
801 ret = mmc_blk_ioctl_multi_cmd(md,
97548575
LW		 802 (struct mmc_ioc_multi_cmd __user *)arg,
803 NULL);
2fe20bae
LW		 804 mmc_blk_put(md);
805 return ret;
a5f5774c
JH		 806 default:
807 return -EINVAL;
808 }
cb87ea28
JC		 809}
810
811#ifdef CONFIG_COMPAT
05bdb996 812static int mmc_blk_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
cb87ea28
JC		 813 unsigned int cmd, unsigned long arg)
814{
815 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
816}
817#endif
818
dc913385
DO		 819static int mmc_blk_alternative_gpt_sector(struct gendisk *disk,
820 sector_t *sector)
821{
822 struct mmc_blk_data *md;
823 int ret;
824
825 md = mmc_blk_get(disk);
826 if (!md)
827 return -EINVAL;
828
829 if (md->queue.card)
830 ret = mmc_card_alternative_gpt_sector(md->queue.card, sector);
831 else
832 ret = -ENODEV;
833
834 mmc_blk_put(md);
835
836 return ret;
837}
838
83d5cde4 839static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 840 .open = mmc_blk_open,
841 .release = mmc_blk_release,
a885c8c4 842 .getgeo = mmc_blk_getgeo,
1da177e4 843 .owner = THIS_MODULE,
cb87ea28
JC		 844 .ioctl = mmc_blk_ioctl,
845#ifdef CONFIG_COMPAT
846 .compat_ioctl = mmc_blk_compat_ioctl,
847#endif
dc913385 848 .alternative_gpt_sector = mmc_blk_alternative_gpt_sector,
1da177e4
LT		 849};
850
025e3d5f
AH		 851static int mmc_blk_part_switch_pre(struct mmc_card *card,
852 unsigned int part_type)
853{
854 int ret = 0;
855
856 if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
857 if (card->ext_csd.cmdq_en) {
858 ret = mmc_cmdq_disable(card);
859 if (ret)
860 return ret;
861 }
862 mmc_retune_pause(card->host);
863 }
864
865 return ret;
866}
867
868static int mmc_blk_part_switch_post(struct mmc_card *card,
869 unsigned int part_type)
870{
871 int ret = 0;
872
873 if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
874 mmc_retune_unpause(card->host);
875 if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
876 ret = mmc_cmdq_enable(card);
877 }
878
879 return ret;
880}
881
371a689f 882static inline int mmc_blk_part_switch(struct mmc_card *card,
1f797edc 883 unsigned int part_type)
371a689f 884{
025e3d5f 885 int ret = 0;
fc95e30b 886 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 887
1f797edc 888 if (main_md->part_curr == part_type)
371a689f
AW		 889 return 0;
890
891 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 892 u8 part_config = card->ext_csd.part_config;
893
1f797edc 894 ret = mmc_blk_part_switch_pre(card, part_type);
025e3d5f
AH		 895 if (ret)
896 return ret;
57da0c04 897
0d7d85ca 898 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1f797edc 899 part_config |= part_type;
371a689f
AW		 900
901 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 902 EXT_CSD_PART_CONFIG, part_config,
371a689f 903 card->ext_csd.part_time);
57da0c04 904 if (ret) {
1f797edc 905 mmc_blk_part_switch_post(card, part_type);
371a689f 906 return ret;
57da0c04 907 }
0d7d85ca
AH		 908
909 card->ext_csd.part_config = part_config;
57da0c04 910
025e3d5f 911 ret = mmc_blk_part_switch_post(card, main_md->part_curr);
67716327 912 }
371a689f 913
1f797edc 914 main_md->part_curr = part_type;
025e3d5f 915 return ret;
371a689f
AW		 916}
917
169f03a0 918static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
ec5a19dd
PO		 919{
920 int err;
051913da
BD		 921 u32 result;
922 __be32 *blocks;
ec5a19dd 923
c7836d15
MY		 924 struct mmc_request mrq = {};
925 struct mmc_command cmd = {};
926 struct mmc_data data = {};
ec5a19dd
PO		 927
928 struct scatterlist sg;
929
13433b9e 930 err = mmc_app_cmd(card->host, card);
7213d175 931 if (err)
169f03a0 932 return err;
ec5a19dd
PO		 933
934 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
935 cmd.arg = 0;
7213d175 936 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 937
ec5a19dd
PO		 938 data.blksz = 4;
939 data.blocks = 1;
940 data.flags = MMC_DATA_READ;
941 data.sg = &sg;
942 data.sg_len = 1;
d380443c 943 mmc_set_data_timeout(&data, card);
ec5a19dd 944
ec5a19dd
PO		 945 mrq.cmd = &cmd;
946 mrq.data = &data;
947
051913da
BD		 948 blocks = kmalloc(4, GFP_KERNEL);
949 if (!blocks)
169f03a0 950 return -ENOMEM;
051913da
BD		 951
952 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 953
954 mmc_wait_for_req(card->host, &mrq);
955
051913da
BD		 956 result = ntohl(*blocks);
957 kfree(blocks);
958
17b0429d 959 if (cmd.error || data.error)
169f03a0
LW		 960 return -EIO;
961
962 *written_blocks = result;
ec5a19dd 963
169f03a0 964 return 0;
ec5a19dd
PO		 965}
966
92c0a0cc
AH		 967static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
968{
969 if (host->actual_clock)
970 return host->actual_clock / 1000;
971
972 /* Clock may be subject to a divisor, fudge it by a factor of 2. */
973 if (host->ios.clock)
974 return host->ios.clock / 2000;
975
976 /* How can there be no clock */
977 WARN_ON_ONCE(1);
978 return 100; /* 100 kHz is minimum possible value */
979}
980
981static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
982 struct mmc_data *data)
983{
984 unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
985 unsigned int khz;
986
987 if (data->timeout_clks) {
988 khz = mmc_blk_clock_khz(host);
989 ms += DIV_ROUND_UP(data->timeout_clks, khz);
990 }
991
992 return ms;
993}
994
406e1480
CL		 995/*
996 * Attempts to reset the card and get back to the requested partition.
997 * Therefore any error here must result in cancelling the block layer
998 * request, it must not be reattempted without going through the mmc_blk
999 * partition sanity checks.
1000 */
67716327
AH		 1001static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1002 int type)
1003{
1004 int err;
406e1480 1005 struct mmc_blk_data *main_md = dev_get_drvdata(&host->card->dev);
67716327
AH		 1006
1007 if (md->reset_done & type)
1008 return -EEXIST;
1009
1010 md->reset_done |= type;
b71597ed 1011 err = mmc_hw_reset(host->card);
406e1480
CL		 1012 /*
1013 * A successful reset will leave the card in the main partition, but
1014 * upon failure it might not be, so set it to MMC_BLK_PART_INVALID
1015 * in that case.
1016 */
1017 main_md->part_curr = err ? MMC_BLK_PART_INVALID : main_md->part_type;
1018 if (err)
1019 return err;
67716327 1020 /* Ensure we switch back to the correct partition */
406e1480
CL		 1021 if (mmc_blk_part_switch(host->card, md->part_type))
1022 /*
1023 * We have failed to get back into the correct
1024 * partition, so we need to abort the whole request.
1025 */
1026 return -ENODEV;
1027 return 0;
67716327
AH		 1028}
1029
1030static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1031{
1032 md->reset_done &= ~type;
1033}
1034
5ec12396
LW		 1035/*
1036 * The non-block commands come back from the block layer after it queued it and
1037 * processed it with all other requests and then they get issued in this
1038 * function.
1039 */
1040static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
1041{
1042 struct mmc_queue_req *mq_rq;
1043 struct mmc_card *card = mq->card;
1044 struct mmc_blk_data *md = mq->blkdata;
69f7599e 1045 struct mmc_blk_ioc_data **idata;
97548575 1046 bool rpmb_ioctl;
627c3ccf
LW		 1047 u8 **ext_csd;
1048 u32 status;
0493f6fe 1049 int ret;
5ec12396
LW		 1050 int i;
1051
1052 mq_rq = req_to_mmc_queue_req(req);
97548575 1053 rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB);
5ec12396
LW		 1054
1055 switch (mq_rq->drv_op) {
1056 case MMC_DRV_OP_IOCTL:
70b52f09
BH		 1057 if (card->ext_csd.cmdq_en) {
1058 ret = mmc_cmdq_disable(card);
1059 if (ret)
1060 break;
1061 }
1062 fallthrough;
97548575 1063 case MMC_DRV_OP_IOCTL_RPMB:
69f7599e 1064 idata = mq_rq->drv_op_data;
7432b49b 1065 for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
69f7599e 1066 ret = __mmc_blk_ioctl_cmd(card, md, idata[i]);
0493f6fe 1067 if (ret)
5ec12396
LW		 1068 break;
1069 }
5ec12396 1070 /* Always switch back to main area after RPMB access */
97548575
LW		 1071 if (rpmb_ioctl)
1072 mmc_blk_part_switch(card, 0);
70b52f09
BH		 1073 else if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
1074 mmc_cmdq_enable(card);
0493f6fe
LW		 1075 break;
1076 case MMC_DRV_OP_BOOT_WP:
1077 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
1078 card->ext_csd.boot_ro_lock |
1079 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
1080 card->ext_csd.part_time);
1081 if (ret)
1082 pr_err("%s: Locking boot partition ro until next power on failed: %d\n",
1083 md->disk->disk_name, ret);
1084 else
1085 card->ext_csd.boot_ro_lock |=
1086 EXT_CSD_BOOT_WP_B_PWR_WP_EN;
5ec12396 1087 break;
627c3ccf
LW		 1088 case MMC_DRV_OP_GET_CARD_STATUS:
1089 ret = mmc_send_status(card, &status);
1090 if (!ret)
1091 ret = status;
1092 break;
1093 case MMC_DRV_OP_GET_EXT_CSD:
1094 ext_csd = mq_rq->drv_op_data;
1095 ret = mmc_get_ext_csd(card, ext_csd);
1096 break;
5ec12396 1097 default:
0493f6fe
LW		 1098 pr_err("%s: unknown driver specific operation\n",
1099 md->disk->disk_name);
1100 ret = -EINVAL;
5ec12396
LW		 1101 break;
1102 }
0493f6fe 1103 mq_rq->drv_op_result = ret;
0fbfd125 1104 blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
5ec12396
LW		 1105}
1106
f7b6fc32
VW		 1107static void mmc_blk_issue_erase_rq(struct mmc_queue *mq, struct request *req,
1108 int type, unsigned int erase_arg)
bd788c96 1109{
7db3028e 1110 struct mmc_blk_data *md = mq->blkdata;
bd788c96 1111 struct mmc_card *card = md->queue.card;
01904ff7 1112 unsigned int from, nr;
f7b6fc32 1113 int err = 0;
2a842aca 1114 blk_status_t status = BLK_STS_OK;
bd788c96 1115
bd788c96 1116 if (!mmc_can_erase(card)) {
2a842aca 1117 status = BLK_STS_NOTSUPP;
8cb6ed17 1118 goto fail;
bd788c96
AH		 1119 }
1120
1121 from = blk_rq_pos(req);
1122 nr = blk_rq_sectors(req);
1123
164b50b3
GU		 1124 do {
1125 err = 0;
1126 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1127 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1128 INAND_CMD38_ARG_EXT_CSD,
f7b6fc32 1129 erase_arg == MMC_TRIM_ARG ?
164b50b3
GU		 1130 INAND_CMD38_ARG_TRIM :
1131 INAND_CMD38_ARG_ERASE,
ad91619a 1132 card->ext_csd.generic_cmd6_time);
164b50b3
GU		 1133 }
1134 if (!err)
f7b6fc32 1135 err = mmc_erase(card, from, nr, erase_arg);
164b50b3 1136 } while (err == -EIO && !mmc_blk_reset(md, card->host, type));
2a842aca
CH		 1137 if (err)
1138 status = BLK_STS_IOERR;
1139 else
67716327 1140 mmc_blk_reset_success(md, type);
8cb6ed17 1141fail:
0fbfd125 1142 blk_mq_end_request(req, status);
bd788c96
AH		 1143}
1144
f7b6fc32
VW		 1145static void mmc_blk_issue_trim_rq(struct mmc_queue *mq, struct request *req)
1146{
1147 mmc_blk_issue_erase_rq(mq, req, MMC_BLK_TRIM, MMC_TRIM_ARG);
1148}
1149
1150static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1151{
1152 struct mmc_blk_data *md = mq->blkdata;
1153 struct mmc_card *card = md->queue.card;
07d2872b 1154 unsigned int arg = card->erase_arg;
f7b6fc32 1155
07d2872b
AA		 1156 if (mmc_card_broken_sd_discard(card))
1157 arg = SD_ERASE_ARG;
1158
1159 mmc_blk_issue_erase_rq(mq, req, MMC_BLK_DISCARD, arg);
f7b6fc32
VW		 1160}
1161
df061588 1162static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
49804548
AH		 1163 struct request *req)
1164{
7db3028e 1165 struct mmc_blk_data *md = mq->blkdata;
49804548 1166 struct mmc_card *card = md->queue.card;
775a9362 1167 unsigned int from, nr, arg;
67716327 1168 int err = 0, type = MMC_BLK_SECDISCARD;
2a842aca 1169 blk_status_t status = BLK_STS_OK;
49804548 1170
775a9362 1171 if (!(mmc_can_secure_erase_trim(card))) {
2a842aca 1172 status = BLK_STS_NOTSUPP;
49804548
AH		 1173 goto out;
1174 }
1175
28302812
AH		 1176 from = blk_rq_pos(req);
1177 nr = blk_rq_sectors(req);
1178
775a9362
ME		 1179 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1180 arg = MMC_SECURE_TRIM1_ARG;
1181 else
1182 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1183
67716327 1184retry:
6a7a6b45
AW		 1185 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1186 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1187 INAND_CMD38_ARG_EXT_CSD,
1188 arg == MMC_SECURE_TRIM1_ARG ?
1189 INAND_CMD38_ARG_SECTRIM1 :
1190 INAND_CMD38_ARG_SECERASE,
ad91619a 1191 card->ext_csd.generic_cmd6_time);
6a7a6b45 1192 if (err)
28302812 1193 goto out_retry;
6a7a6b45 1194 }
28302812 1195
49804548 1196 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1197 if (err == -EIO)
1198 goto out_retry;
2a842aca
CH		 1199 if (err) {
1200 status = BLK_STS_IOERR;
28302812 1201 goto out;
2a842aca 1202 }
28302812
AH		 1203
1204 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1205 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1206 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1207 INAND_CMD38_ARG_EXT_CSD,
1208 INAND_CMD38_ARG_SECTRIM2,
ad91619a 1209 card->ext_csd.generic_cmd6_time);
6a7a6b45 1210 if (err)
28302812 1211 goto out_retry;
6a7a6b45 1212 }
28302812 1213
49804548 1214 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1215 if (err == -EIO)
1216 goto out_retry;
2a842aca
CH		 1217 if (err) {
1218 status = BLK_STS_IOERR;
28302812 1219 goto out;
2a842aca 1220 }
6a7a6b45 1221 }
28302812 1222
28302812
AH		 1223out_retry:
1224 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1225 goto retry;
1226 if (!err)
1227 mmc_blk_reset_success(md, type);
28302812 1228out:
0fbfd125 1229 blk_mq_end_request(req, status);
49804548
AH		 1230}
1231
df061588 1232static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
f4c5522b 1233{
7db3028e 1234 struct mmc_blk_data *md = mq->blkdata;
881d1c25
SJ		 1235 struct mmc_card *card = md->queue.card;
1236 int ret = 0;
1237
8ae11ede 1238 ret = mmc_flush_cache(card->host);
0fbfd125 1239 blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
f4c5522b
AW		 1240}
1241
1242/*
1243 * Reformat current write as a reliable write, supporting
1244 * both legacy and the enhanced reliable write MMC cards.
1245 * In each transfer we'll handle only as much as a single
1246 * reliable write can handle, thus finish the request in
1247 * partial completions.
1248 */
d0c97cfb
AW		 1249static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1250 struct mmc_card *card,
1251 struct request *req)
f4c5522b 1252{
f4c5522b
AW		 1253 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1254 /* Legacy mode imposes restrictions on transfers. */
9cb38f7a 1255 if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors))
f4c5522b
AW		 1256 brq->data.blocks = 1;
1257
1258 if (brq->data.blocks > card->ext_csd.rel_sectors)
1259 brq->data.blocks = card->ext_csd.rel_sectors;
1260 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1261 brq->data.blocks = 1;
1262 }
f4c5522b
AW		 1263}
1264
f47a1fe3
AH		 1265#define CMD_ERRORS_EXCL_OOR \
1266 (R1_ADDRESS_ERROR | /* Misaligned address */ \
4c2b8f26
RKAL		 1267 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1268 R1_WP_VIOLATION | /* Tried to write to protected block */ \
a04e6bae 1269 R1_CARD_ECC_FAILED | /* Card ECC failed */ \
4c2b8f26
RKAL		 1270 R1_CC_ERROR | /* Card controller error */ \
1271 R1_ERROR) /* General/unknown error */
1272
f47a1fe3
AH		 1273#define CMD_ERRORS \
1274 (CMD_ERRORS_EXCL_OOR | \
1275 R1_OUT_OF_RANGE) /* Command argument out of range */ \
1276
d83c2dba 1277static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq)
a04e6bae 1278{
d83c2dba 1279 u32 val;
a04e6bae 1280
d83c2dba
SL		 1281 /*
1282 * Per the SD specification(physical layer version 4.10)[1],
1283 * section 4.3.3, it explicitly states that "When the last
1284 * block of user area is read using CMD18, the host should
1285 * ignore OUT_OF_RANGE error that may occur even the sequence
1286 * is correct". And JESD84-B51 for eMMC also has a similar
1287 * statement on section 6.8.3.
1288 *
1289 * Multiple block read/write could be done by either predefined
1290 * method, namely CMD23, or open-ending mode. For open-ending mode,
1291 * we should ignore the OUT_OF_RANGE error as it's normal behaviour.
1292 *
1293 * However the spec[1] doesn't tell us whether we should also
1294 * ignore that for predefined method. But per the spec[1], section
1295 * 4.15 Set Block Count Command, it says"If illegal block count
1296 * is set, out of range error will be indicated during read/write
1297 * operation (For example, data transfer is stopped at user area
1298 * boundary)." In another word, we could expect a out of range error
1299 * in the response for the following CMD18/25. And if argument of
1300 * CMD23 + the argument of CMD18/25 exceed the max number of blocks,
1301 * we could also expect to get a -ETIMEDOUT or any error number from
1302 * the host drivers due to missing data response(for write)/data(for
1303 * read), as the cards will stop the data transfer by itself per the
1304 * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode.
1305 */
1306
1307 if (!brq->stop.error) {
1308 bool oor_with_open_end;
1309 /* If there is no error yet, check R1 response */
1310
1311 val = brq->stop.resp[0] & CMD_ERRORS;
1312 oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc;
1313
1314 if (val && !oor_with_open_end)
1315 brq->stop.error = -EIO;
1316 }
a04e6bae
WS		 1317}
1318
ca5717f7 1319static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
b3fa3e6d 1320 int recovery_mode, bool *do_rel_wr_p,
d3377c01 1321 bool *do_data_tag_p)
1da177e4 1322{
ca5717f7
AH		 1323 struct mmc_blk_data *md = mq->blkdata;
1324 struct mmc_card *card = md->queue.card;
54d49d77 1325 struct mmc_blk_request *brq = &mqrq->brq;
67e69d52 1326 struct request *req = mmc_queue_req_to_req(mqrq);
d3377c01 1327 bool do_rel_wr, do_data_tag;
1da177e4 1328
f4c5522b
AW		 1329 /*
1330 * Reliable writes are used to implement Forced Unit Access and
d3df0465 1331 * are supported only on MMCs.
f4c5522b 1332 */
d3377c01
AH		 1333 do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1334 rq_data_dir(req) == WRITE &&
1335 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1336
54d49d77 1337 memset(brq, 0, sizeof(struct mmc_blk_request));
ca5717f7 1338
93f1c150
EB		 1339 mmc_crypto_prepare_req(mqrq);
1340
54d49d77 1341 brq->mrq.data = &brq->data;
93482b3d 1342 brq->mrq.tag = req->tag;
1da177e4 1343
54d49d77
PF		 1344 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1345 brq->stop.arg = 0;
ca5717f7
AH		 1346
1347 if (rq_data_dir(req) == READ) {
1348 brq->data.flags = MMC_DATA_READ;
1349 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
1350 } else {
1351 brq->data.flags = MMC_DATA_WRITE;
1352 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1353 }
1354
1355 brq->data.blksz = 512;
54d49d77 1356 brq->data.blocks = blk_rq_sectors(req);
93482b3d
AH		 1357 brq->data.blk_addr = blk_rq_pos(req);
1358
1359 /*
1360 * The command queue supports 2 priorities: "high" (1) and "simple" (0).
1361 * The eMMC will give "high" priority tasks priority over "simple"
1362 * priority tasks. Here we always set "simple" priority by not setting
1363 * MMC_DATA_PRIO.
1364 */
6a79e391 1365
54d49d77
PF		 1366 /*
1367 * The block layer doesn't support all sector count
1368 * restrictions, so we need to be prepared for too big
1369 * requests.
1370 */
1371 if (brq->data.blocks > card->host->max_blk_count)
1372 brq->data.blocks = card->host->max_blk_count;
1da177e4 1373
2bf22b39 1374 if (brq->data.blocks > 1) {
41591b38
CB		 1375 /*
1376 * Some SD cards in SPI mode return a CRC error or even lock up
1377 * completely when trying to read the last block using a
1378 * multiblock read command.
1379 */
1380 if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) &&
1381 (blk_rq_pos(req) + blk_rq_sectors(req) ==
1382 get_capacity(md->disk)))
1383 brq->data.blocks--;
1384
2bf22b39 1385 /*
b3fa3e6d 1386 * After a read error, we redo the request one (native) sector
2bf22b39
PW		 1387 * at a time in order to accurately determine which
1388 * sectors can be read successfully.
1389 */
b3fa3e6d
CL		 1390 if (recovery_mode)
1391 brq->data.blocks = queue_physical_block_size(mq->queue) >> 9;
2bf22b39 1392
2e47e842
KM		 1393 /*
1394 * Some controllers have HW issues while operating
1395 * in multiple I/O mode
1396 */
1397 if (card->host->ops->multi_io_quirk)
1398 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1399 (rq_data_dir(req) == READ) ?
1400 MMC_DATA_READ : MMC_DATA_WRITE,
1401 brq->data.blocks);
2bf22b39 1402 }
d0c97cfb 1403
93482b3d 1404 if (do_rel_wr) {
ca5717f7 1405 mmc_apply_rel_rw(brq, card, req);
93482b3d
AH		 1406 brq->data.flags |= MMC_DATA_REL_WR;
1407 }
ca5717f7
AH		 1408
1409 /*
1410 * Data tag is used only during writing meta data to speed
1411 * up write and any subsequent read of this meta data
1412 */
d3377c01
AH		 1413 do_data_tag = card->ext_csd.data_tag_unit_size &&
1414 (req->cmd_flags & REQ_META) &&
1415 (rq_data_dir(req) == WRITE) &&
1416 ((brq->data.blocks * brq->data.blksz) >=
1417 card->ext_csd.data_tag_unit_size);
ca5717f7 1418
93482b3d
AH		 1419 if (do_data_tag)
1420 brq->data.flags |= MMC_DATA_DAT_TAG;
1421
ca5717f7
AH		 1422 mmc_set_data_timeout(&brq->data, card);
1423
1424 brq->data.sg = mqrq->sg;
1425 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1426
1427 /*
1428 * Adjust the sg list so it is the same size as the
1429 * request.
1430 */
1431 if (brq->data.blocks != blk_rq_sectors(req)) {
1432 int i, data_size = brq->data.blocks << 9;
1433 struct scatterlist *sg;
1434
1435 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1436 data_size -= sg->length;
1437 if (data_size <= 0) {
1438 sg->length += data_size;
1439 i++;
1440 break;
1441 }
1442 }
1443 brq->data.sg_len = i;
1444 }
1445
d3377c01
AH		 1446 if (do_rel_wr_p)
1447 *do_rel_wr_p = do_rel_wr;
1448
1449 if (do_data_tag_p)
1450 *do_data_tag_p = do_data_tag;
ca5717f7
AH		 1451}
1452
1e8e55b6
AH		 1453#define MMC_CQE_RETRIES 2
1454
1455static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req)
1456{
1457 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1458 struct mmc_request *mrq = &mqrq->brq.mrq;
1459 struct request_queue *q = req->q;
1460 struct mmc_host *host = mq->card->host;
e6bfb1bf 1461 enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
1e8e55b6
AH		 1462 unsigned long flags;
1463 bool put_card;
1464 int err;
1465
1466 mmc_cqe_post_req(host, mrq);
1467
1468 if (mrq->cmd && mrq->cmd->error)
1469 err = mrq->cmd->error;
1470 else if (mrq->data && mrq->data->error)
1471 err = mrq->data->error;
1472 else
1473 err = 0;
1474
1475 if (err) {
1476 if (mqrq->retries++ < MMC_CQE_RETRIES)
1477 blk_mq_requeue_request(req, true);
1478 else
1479 blk_mq_end_request(req, BLK_STS_IOERR);
1480 } else if (mrq->data) {
1481 if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered))
1482 blk_mq_requeue_request(req, true);
1483 else
1484 __blk_mq_end_request(req, BLK_STS_OK);
1485 } else {
1486 blk_mq_end_request(req, BLK_STS_OK);
1487 }
1488
f5d72c5c 1489 spin_lock_irqsave(&mq->lock, flags);
1e8e55b6 1490
e6bfb1bf 1491 mq->in_flight[issue_type] -= 1;
1e8e55b6
AH		 1492
1493 put_card = (mmc_tot_in_flight(mq) == 0);
1494
1495 mmc_cqe_check_busy(mq);
1496
f5d72c5c 1497 spin_unlock_irqrestore(&mq->lock, flags);
1e8e55b6
AH		 1498
1499 if (!mq->cqe_busy)
1500 blk_mq_run_hw_queues(q, true);
1501
1502 if (put_card)
1503 mmc_put_card(mq->card, &mq->ctx);
1504}
1505
1506void mmc_blk_cqe_recovery(struct mmc_queue *mq)
1507{
1508 struct mmc_card *card = mq->card;
1509 struct mmc_host *host = card->host;
1510 int err;
1511
1512 pr_debug("%s: CQE recovery start\n", mmc_hostname(host));
1513
1514 err = mmc_cqe_recovery(host);
1515 if (err)
1516 mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY);
a051246b 1517 mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY);
1e8e55b6
AH		 1518
1519 pr_debug("%s: CQE recovery done\n", mmc_hostname(host));
1520}
1521
1522static void mmc_blk_cqe_req_done(struct mmc_request *mrq)
1523{
1524 struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
1525 brq.mrq);
1526 struct request *req = mmc_queue_req_to_req(mqrq);
1527 struct request_queue *q = req->q;
1528 struct mmc_queue *mq = q->queuedata;
1529
1530 /*
1531 * Block layer timeouts race with completions which means the normal
1532 * completion path cannot be used during recovery.
1533 */
1534 if (mq->in_recovery)
1535 mmc_blk_cqe_complete_rq(mq, req);
15f73f5b 1536 else if (likely(!blk_should_fake_timeout(req->q)))
1e8e55b6
AH		 1537 blk_mq_complete_request(req);
1538}
1539
1540static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
1541{
1542 mrq->done = mmc_blk_cqe_req_done;
1543 mrq->recovery_notifier = mmc_cqe_recovery_notifier;
1544
1545 return mmc_cqe_start_req(host, mrq);
1546}
1547
1548static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq,
1549 struct request *req)
1550{
1551 struct mmc_blk_request *brq = &mqrq->brq;
1552
1553 memset(brq, 0, sizeof(*brq));
1554
1555 brq->mrq.cmd = &brq->cmd;
1556 brq->mrq.tag = req->tag;
1557
1558 return &brq->mrq;
1559}
1560
1561static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req)
1562{
1563 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1564 struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req);
1565
1566 mrq->cmd->opcode = MMC_SWITCH;
1567 mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
1568 (EXT_CSD_FLUSH_CACHE << 16) |
1569 (1 << 8) |
1570 EXT_CSD_CMD_SET_NORMAL;
1571 mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B;
1572
1573 return mmc_blk_cqe_start_req(mq->card->host, mrq);
1574}
1575
511ce378
BW		 1576static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req)
1577{
1578 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1579 struct mmc_host *host = mq->card->host;
1580 int err;
1581
1582 mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
1583 mqrq->brq.mrq.done = mmc_blk_hsq_req_done;
1584 mmc_pre_req(host, &mqrq->brq.mrq);
1585
1586 err = mmc_cqe_start_req(host, &mqrq->brq.mrq);
1587 if (err)
1588 mmc_post_req(host, &mqrq->brq.mrq, err);
1589
1590 return err;
1591}
1592
1e8e55b6
AH		 1593static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req)
1594{
1595 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
511ce378
BW		 1596 struct mmc_host *host = mq->card->host;
1597
1598 if (host->hsq_enabled)
1599 return mmc_blk_hsq_issue_rw_rq(mq, req);
1e8e55b6
AH		 1600
1601 mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL);
1602
1603 return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq);
1604}
1605
ca5717f7
AH		 1606static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1607 struct mmc_card *card,
b3fa3e6d 1608 int recovery_mode,
ca5717f7
AH		 1609 struct mmc_queue *mq)
1610{
1611 u32 readcmd, writecmd;
1612 struct mmc_blk_request *brq = &mqrq->brq;
67e69d52 1613 struct request *req = mmc_queue_req_to_req(mqrq);
ca5717f7
AH		 1614 struct mmc_blk_data *md = mq->blkdata;
1615 bool do_rel_wr, do_data_tag;
1616
b3fa3e6d 1617 mmc_blk_data_prep(mq, mqrq, recovery_mode, &do_rel_wr, &do_data_tag);
ca5717f7
AH		 1618
1619 brq->mrq.cmd = &brq->cmd;
1620
1621 brq->cmd.arg = blk_rq_pos(req);
1622 if (!mmc_card_blockaddr(card))
1623 brq->cmd.arg <<= 9;
1624 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1625
54d49d77
PF		 1626 if (brq->data.blocks > 1 || do_rel_wr) {
1627 /* SPI multiblock writes terminate using a special
1628 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1629 */
54d49d77
PF		 1630 if (!mmc_host_is_spi(card->host) ||
1631 rq_data_dir(req) == READ)
1632 brq->mrq.stop = &brq->stop;
1633 readcmd = MMC_READ_MULTIPLE_BLOCK;
1634 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1635 } else {
1636 brq->mrq.stop = NULL;
1637 readcmd = MMC_READ_SINGLE_BLOCK;
1638 writecmd = MMC_WRITE_BLOCK;
1639 }
ca5717f7 1640 brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
4265900e 1641
54d49d77
PF		 1642 /*
1643 * Pre-defined multi-block transfers are preferable to
1644 * open ended-ones (and necessary for reliable writes).
1645 * However, it is not sufficient to just send CMD23,
1646 * and avoid the final CMD12, as on an error condition
1647 * CMD12 (stop) needs to be sent anyway. This, coupled
1648 * with Auto-CMD23 enhancements provided by some
1649 * hosts, means that the complexity of dealing
1650 * with this is best left to the host. If CMD23 is
1651 * supported by card and host, we'll fill sbc in and let
1652 * the host deal with handling it correctly. This means
1653 * that for hosts that don't expose MMC_CAP_CMD23, no
1654 * change of behavior will be observed.
1655 *
1656 * N.B: Some MMC cards experience perf degradation.
1657 * We'll avoid using CMD23-bounded multiblock writes for
1658 * these, while retaining features like reliable writes.
1659 */
4265900e
SD		 1660 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1661 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1662 do_data_tag)) {
54d49d77
PF		 1663 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1664 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1665 (do_rel_wr ? (1 << 31) : 0) |
1666 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1667 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1668 brq->mrq.sbc = &brq->sbc;
1669 }
54d49d77 1670}
6a79e391 1671
81196976 1672#define MMC_MAX_RETRIES 5
7eb43d53 1673#define MMC_DATA_RETRIES 2
81196976
AH		 1674#define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1)
1675
7eb43d53
AH		 1676static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout)
1677{
1678 struct mmc_command cmd = {
1679 .opcode = MMC_STOP_TRANSMISSION,
1680 .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC,
1681 /* Some hosts wait for busy anyway, so provide a busy timeout */
1682 .busy_timeout = timeout,
1683 };
1684
1685 return mmc_wait_for_cmd(card->host, &cmd, 5);
1686}
1687
1688static int mmc_blk_fix_state(struct mmc_card *card, struct request *req)
1689{
1690 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1691 struct mmc_blk_request *brq = &mqrq->brq;
1692 unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
1693 int err;
1694
1695 mmc_retune_hold_now(card->host);
1696
1697 mmc_blk_send_stop(card, timeout);
1698
972d5084 1699 err = mmc_poll_for_busy(card, timeout, false, MMC_BUSY_IO);
7eb43d53
AH		 1700
1701 mmc_retune_release(card->host);
1702
1703 return err;
1704}
1705
81196976
AH		 1706#define MMC_READ_SINGLE_RETRIES 2
1707
b3fa3e6d 1708/* Single (native) sector read during recovery */
81196976
AH		 1709static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
1710{
1711 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1712 struct mmc_request *mrq = &mqrq->brq.mrq;
1713 struct mmc_card *card = mq->card;
1714 struct mmc_host *host = card->host;
1715 blk_status_t error = BLK_STS_OK;
b3fa3e6d 1716 size_t bytes_per_read = queue_physical_block_size(mq->queue);
81196976
AH		 1717
1718 do {
1719 u32 status;
1720 int err;
54309fde 1721 int retries = 0;
81196976 1722
54309fde
CL		 1723 while (retries++ <= MMC_READ_SINGLE_RETRIES) {
1724 mmc_blk_rw_rq_prep(mqrq, card, 1, mq);
81196976 1725
54309fde 1726 mmc_wait_for_req(host, mrq);
81196976 1727
54309fde 1728 err = mmc_send_status(card, &status);
81196976
AH		 1729 if (err)
1730 goto error_exit;
81196976 1731
54309fde
CL		 1732 if (!mmc_host_is_spi(host) &&
1733 !mmc_ready_for_data(status)) {
1734 err = mmc_blk_fix_state(card, req);
1735 if (err)
1736 goto error_exit;
1737 }
81196976 1738
54309fde
CL		 1739 if (!mrq->cmd->error)
1740 break;
1741 }
81196976
AH		 1742
1743 if (mrq->cmd->error ||
1744 mrq->data->error ||
1745 (!mmc_host_is_spi(host) &&
1746 (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS)))
1747 error = BLK_STS_IOERR;
1748 else
1749 error = BLK_STS_OK;
1750
b3fa3e6d 1751 } while (blk_update_request(req, error, bytes_per_read));
81196976
AH		 1752
1753 return;
1754
1755error_exit:
1756 mrq->data->bytes_xfered = 0;
b3fa3e6d 1757 blk_update_request(req, BLK_STS_IOERR, bytes_per_read);
81196976
AH		 1758 /* Let it try the remaining request again */
1759 if (mqrq->retries > MMC_MAX_RETRIES - 1)
1760 mqrq->retries = MMC_MAX_RETRIES - 1;
1761}
1762
7eb43d53
AH		 1763static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq)
1764{
1765 return !!brq->mrq.sbc;
1766}
1767
1768static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq)
1769{
1770 return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR;
1771}
1772
1773/*
1774 * Check for errors the host controller driver might not have seen such as
1775 * response mode errors or invalid card state.
1776 */
1777static bool mmc_blk_status_error(struct request *req, u32 status)
1778{
1779 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1780 struct mmc_blk_request *brq = &mqrq->brq;
1781 struct mmc_queue *mq = req->q->queuedata;
1782 u32 stop_err_bits;
1783
1784 if (mmc_host_is_spi(mq->card->host))
aa950144 1785 return false;
7eb43d53
AH		 1786
1787 stop_err_bits = mmc_blk_stop_err_bits(brq);
1788
1789 return brq->cmd.resp[0] & CMD_ERRORS ||
1790 brq->stop.resp[0] & stop_err_bits ||
1791 status & stop_err_bits ||
40c96853 1792 (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status));
7eb43d53
AH		 1793}
1794
1795static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq)
1796{
1797 return !brq->sbc.error && !brq->cmd.error &&
1798 !(brq->cmd.resp[0] & CMD_ERRORS);
1799}
1800
1801/*
1802 * Requests are completed by mmc_blk_mq_complete_rq() which sets simple
1803 * policy:
1804 * 1. A request that has transferred at least some data is considered
1805 * successful and will be requeued if there is remaining data to
1806 * transfer.
1807 * 2. Otherwise the number of retries is incremented and the request
1808 * will be requeued if there are remaining retries.
1809 * 3. Otherwise the request will be errored out.
1810 * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and
1811 * mqrq->retries. So there are only 4 possible actions here:
1812 * 1. do not accept the bytes_xfered value i.e. set it to zero
1813 * 2. change mqrq->retries to determine the number of retries
1814 * 3. try to reset the card
1815 * 4. read one sector at a time
1816 */
81196976
AH		 1817static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req)
1818{
1819 int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1820 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
1821 struct mmc_blk_request *brq = &mqrq->brq;
1822 struct mmc_blk_data *md = mq->blkdata;
1823 struct mmc_card *card = mq->card;
7eb43d53
AH		 1824 u32 status;
1825 u32 blocks;
1826 int err;
81196976 1827
7eb43d53
AH		 1828 /*
1829 * Some errors the host driver might not have seen. Set the number of
1830 * bytes transferred to zero in that case.
1831 */
1832 err = __mmc_send_status(card, &status, 0);
1833 if (err || mmc_blk_status_error(req, status))
1834 brq->data.bytes_xfered = 0;
81196976
AH		 1835
1836 mmc_retune_release(card->host);
1837
1838 /*
7eb43d53
AH		 1839 * Try again to get the status. This also provides an opportunity for
1840 * re-tuning.
81196976 1841 */
7eb43d53
AH		 1842 if (err)
1843 err = __mmc_send_status(card, &status, 0);
81196976 1844
7eb43d53
AH		 1845 /*
1846 * Nothing more to do after the number of bytes transferred has been
1847 * updated and there is no card.
1848 */
1849 if (err && mmc_detect_card_removed(card->host))
1850 return;
81196976 1851
7eb43d53
AH		 1852 /* Try to get back to "tran" state */
1853 if (!mmc_host_is_spi(mq->card->host) &&
40c96853 1854 (err || !mmc_ready_for_data(status)))
7eb43d53
AH		 1855 err = mmc_blk_fix_state(mq->card, req);
1856
1857 /*
1858 * Special case for SD cards where the card might record the number of
1859 * blocks written.
1860 */
1861 if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) &&
1862 rq_data_dir(req) == WRITE) {
1863 if (mmc_sd_num_wr_blocks(card, &blocks))
1864 brq->data.bytes_xfered = 0;
1865 else
1866 brq->data.bytes_xfered = blocks << 9;
81196976 1867 }
7eb43d53
AH		 1868
1869 /* Reset if the card is in a bad state */
1870 if (!mmc_host_is_spi(mq->card->host) &&
1871 err && mmc_blk_reset(md, card->host, type)) {
f3fa33ac 1872 pr_err("%s: recovery failed!\n", req->q->disk->disk_name);
81196976 1873 mqrq->retries = MMC_NO_RETRIES;
7eb43d53
AH		 1874 return;
1875 }
1876
1877 /*
1878 * If anything was done, just return and if there is anything remaining
1879 * on the request it will get requeued.
1880 */
1881 if (brq->data.bytes_xfered)
1882 return;
1883
1884 /* Reset before last retry */
406e1480
CL		 1885 if (mqrq->retries + 1 == MMC_MAX_RETRIES &&
1886 mmc_blk_reset(md, card->host, type))
1887 return;
7eb43d53
AH		 1888
1889 /* Command errors fail fast, so use all MMC_MAX_RETRIES */
1890 if (brq->sbc.error || brq->cmd.error)
1891 return;
1892
1893 /* Reduce the remaining retries for data errors */
1894 if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) {
1895 mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES;
1896 return;
1897 }
1898
b3fa3e6d
CL		 1899 if (rq_data_dir(req) == READ && brq->data.blocks >
1900 queue_physical_block_size(mq->queue) >> 9) {
1901 /* Read one (native) sector at a time */
7eb43d53
AH		 1902 mmc_blk_read_single(mq, req);
1903 return;
81196976
AH		 1904 }
1905}
1906
10f21df4
AH		 1907static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq)
1908{
1909 mmc_blk_eval_resp_error(brq);
1910
1911 return brq->sbc.error || brq->cmd.error || brq->stop.error ||
1912 brq->data.error || brq->cmd.resp[0] & CMD_ERRORS;
1913}
1914
5d435933
CL		 1915static int mmc_spi_err_check(struct mmc_card *card)
1916{
1917 u32 status = 0;
1918 int err;
1919
1920 /*
1921 * SPI does not have a TRAN state we have to wait on, instead the
1922 * card is ready again when it no longer holds the line LOW.
1923 * We still have to ensure two things here before we know the write
1924 * was successful:
1925 * 1. The card has not disconnected during busy and we actually read our
1926 * own pull-up, thinking it was still connected, so ensure it
1927 * still responds.
1928 * 2. Check for any error bits, in particular R1_SPI_IDLE to catch a
1929 * just reconnected card after being disconnected during busy.
1930 */
1931 err = __mmc_send_status(card, &status, 0);
1932 if (err)
1933 return err;
1934 /* All R1 and R2 bits of SPI are errors in our case */
1935 if (status)
1936 return -EIO;
1937 return 0;
1938}
1939
6966e609
UH		 1940static int mmc_blk_busy_cb(void *cb_data, bool *busy)
1941{
1942 struct mmc_blk_busy_data *data = cb_data;
1943 u32 status = 0;
1944 int err;
1945
1946 err = mmc_send_status(data->card, &status);
1947 if (err)
1948 return err;
1949
1950 /* Accumulate response error bits. */
1951 data->status |= status;
1952
1953 *busy = !mmc_ready_for_data(status);
1954 return 0;
1955}
1956
88a51646
AH		 1957static int mmc_blk_card_busy(struct mmc_card *card, struct request *req)
1958{
1959 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
6966e609 1960 struct mmc_blk_busy_data cb_data;
88a51646
AH		 1961 int err;
1962
5d435933 1963 if (rq_data_dir(req) == READ)
88a51646
AH		 1964 return 0;
1965
5d435933
CL		 1966 if (mmc_host_is_spi(card->host)) {
1967 err = mmc_spi_err_check(card);
1968 if (err)
1969 mqrq->brq.data.bytes_xfered = 0;
1970 return err;
1971 }
1972
6966e609
UH		 1973 cb_data.card = card;
1974 cb_data.status = 0;
1760fdb6 1975 err = __mmc_poll_for_busy(card->host, 0, MMC_BLK_TIMEOUT_MS,
2ebbdace 1976 &mmc_blk_busy_cb, &cb_data);
88a51646 1977
f47a1fe3
AH		 1978 /*
1979 * Do not assume data transferred correctly if there are any error bits
1980 * set.
1981 */
6966e609 1982 if (cb_data.status & mmc_blk_stop_err_bits(&mqrq->brq)) {
f47a1fe3 1983 mqrq->brq.data.bytes_xfered = 0;
88a51646
AH		 1984 err = err ? err : -EIO;
1985 }
1986
f47a1fe3 1987 /* Copy the exception bit so it will be seen later on */
6966e609 1988 if (mmc_card_mmc(card) && cb_data.status & R1_EXCEPTION_EVENT)
f47a1fe3
AH		 1989 mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT;
1990
88a51646
AH		 1991 return err;
1992}
1993
10f21df4
AH		 1994static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq,
1995 struct request *req)
1996{
1997 int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1998
1999 mmc_blk_reset_success(mq->blkdata, type);
2000}
2001
81196976
AH		 2002static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req)
2003{
2004 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2005 unsigned int nr_bytes = mqrq->brq.data.bytes_xfered;
2006
2007 if (nr_bytes) {
2008 if (blk_update_request(req, BLK_STS_OK, nr_bytes))
2009 blk_mq_requeue_request(req, true);
2010 else
2011 __blk_mq_end_request(req, BLK_STS_OK);
2012 } else if (!blk_rq_bytes(req)) {
2013 __blk_mq_end_request(req, BLK_STS_IOERR);
2014 } else if (mqrq->retries++ < MMC_MAX_RETRIES) {
2015 blk_mq_requeue_request(req, true);
2016 } else {
2017 if (mmc_card_removed(mq->card))
2018 req->rq_flags |= RQF_QUIET;
2019 blk_mq_end_request(req, BLK_STS_IOERR);
2020 }
2021}
2022
2023static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq,
2024 struct mmc_queue_req *mqrq)
2025{
2026 return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) &&
2027 (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT ||
2028 mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT);
2029}
2030
2031static void mmc_blk_urgent_bkops(struct mmc_queue *mq,
2032 struct mmc_queue_req *mqrq)
2033{
2034 if (mmc_blk_urgent_bkops_needed(mq, mqrq))
0c204979 2035 mmc_run_bkops(mq->card);
81196976
AH		 2036}
2037
511ce378
BW		 2038static void mmc_blk_hsq_req_done(struct mmc_request *mrq)
2039{
2040 struct mmc_queue_req *mqrq =
2041 container_of(mrq, struct mmc_queue_req, brq.mrq);
2042 struct request *req = mmc_queue_req_to_req(mqrq);
2043 struct request_queue *q = req->q;
2044 struct mmc_queue *mq = q->queuedata;
2045 struct mmc_host *host = mq->card->host;
2046 unsigned long flags;
2047
2048 if (mmc_blk_rq_error(&mqrq->brq) ||
2049 mmc_blk_urgent_bkops_needed(mq, mqrq)) {
2050 spin_lock_irqsave(&mq->lock, flags);
2051 mq->recovery_needed = true;
2052 mq->recovery_req = req;
2053 spin_unlock_irqrestore(&mq->lock, flags);
2054
2055 host->cqe_ops->cqe_recovery_start(host);
2056
2057 schedule_work(&mq->recovery_work);
2058 return;
2059 }
2060
2061 mmc_blk_rw_reset_success(mq, req);
2062
2063 /*
2064 * Block layer timeouts race with completions which means the normal
2065 * completion path cannot be used during recovery.
2066 */
2067 if (mq->in_recovery)
2068 mmc_blk_cqe_complete_rq(mq, req);
15f73f5b 2069 else if (likely(!blk_should_fake_timeout(req->q)))
511ce378
BW		 2070 blk_mq_complete_request(req);
2071}
2072
81196976
AH		 2073void mmc_blk_mq_complete(struct request *req)
2074{
2075 struct mmc_queue *mq = req->q->queuedata;
407a1c57 2076 struct mmc_host *host = mq->card->host;
81196976 2077
407a1c57 2078 if (host->cqe_enabled)
1e8e55b6 2079 mmc_blk_cqe_complete_rq(mq, req);
15f73f5b 2080 else if (likely(!blk_should_fake_timeout(req->q)))
1e8e55b6 2081 mmc_blk_mq_complete_rq(mq, req);
81196976
AH		 2082}
2083
2084static void mmc_blk_mq_poll_completion(struct mmc_queue *mq,
2085 struct request *req)
2086{
2087 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
88a51646 2088 struct mmc_host *host = mq->card->host;
81196976 2089
88a51646
AH		 2090 if (mmc_blk_rq_error(&mqrq->brq) ||
2091 mmc_blk_card_busy(mq->card, req)) {
2092 mmc_blk_mq_rw_recovery(mq, req);
2093 } else {
2094 mmc_blk_rw_reset_success(mq, req);
2095 mmc_retune_release(host);
2096 }
81196976
AH		 2097
2098 mmc_blk_urgent_bkops(mq, mqrq);
2099}
2100
4b430d4a 2101static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, enum mmc_issue_type issue_type)
81196976 2102{
81196976
AH		 2103 unsigned long flags;
2104 bool put_card;
2105
f5d72c5c 2106 spin_lock_irqsave(&mq->lock, flags);
81196976 2107
4b430d4a 2108 mq->in_flight[issue_type] -= 1;
81196976
AH		 2109
2110 put_card = (mmc_tot_in_flight(mq) == 0);
2111
f5d72c5c 2112 spin_unlock_irqrestore(&mq->lock, flags);
81196976
AH		 2113
2114 if (put_card)
2115 mmc_put_card(mq->card, &mq->ctx);
2116}
2117
639d3531
SAS		 2118static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req,
2119 bool can_sleep)
81196976 2120{
4b430d4a 2121 enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
81196976
AH		 2122 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2123 struct mmc_request *mrq = &mqrq->brq.mrq;
2124 struct mmc_host *host = mq->card->host;
2125
2126 mmc_post_req(host, mrq, 0);
2127
10f21df4
AH		 2128 /*
2129 * Block layer timeouts race with completions which means the normal
2130 * completion path cannot be used during recovery.
2131 */
639d3531 2132 if (mq->in_recovery) {
10f21df4 2133 mmc_blk_mq_complete_rq(mq, req);
639d3531
SAS		 2134 } else if (likely(!blk_should_fake_timeout(req->q))) {
2135 if (can_sleep)
2136 blk_mq_complete_request_direct(req, mmc_blk_mq_complete);
2137 else
2138 blk_mq_complete_request(req);
2139 }
81196976 2140
4b430d4a 2141 mmc_blk_mq_dec_in_flight(mq, issue_type);
81196976
AH		 2142}
2143
10f21df4
AH		 2144void mmc_blk_mq_recovery(struct mmc_queue *mq)
2145{
2146 struct request *req = mq->recovery_req;
2147 struct mmc_host *host = mq->card->host;
2148 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2149
2150 mq->recovery_req = NULL;
2151 mq->rw_wait = false;
2152
2153 if (mmc_blk_rq_error(&mqrq->brq)) {
2154 mmc_retune_hold_now(host);
2155 mmc_blk_mq_rw_recovery(mq, req);
2156 }
2157
2158 mmc_blk_urgent_bkops(mq, mqrq);
2159
639d3531 2160 mmc_blk_mq_post_req(mq, req, true);
10f21df4
AH		 2161}
2162
81196976
AH		 2163static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
2164 struct request **prev_req)
2165{
10f21df4
AH		 2166 if (mmc_host_done_complete(mq->card->host))
2167 return;
2168
81196976
AH		 2169 mutex_lock(&mq->complete_lock);
2170
2171 if (!mq->complete_req)
2172 goto out_unlock;
2173
2174 mmc_blk_mq_poll_completion(mq, mq->complete_req);
2175
2176 if (prev_req)
2177 *prev_req = mq->complete_req;
2178 else
639d3531 2179 mmc_blk_mq_post_req(mq, mq->complete_req, true);
81196976
AH		 2180
2181 mq->complete_req = NULL;
2182
2183out_unlock:
2184 mutex_unlock(&mq->complete_lock);
2185}
2186
2187void mmc_blk_mq_complete_work(struct work_struct *work)
2188{
2189 struct mmc_queue *mq = container_of(work, struct mmc_queue,
2190 complete_work);
2191
2192 mmc_blk_mq_complete_prev_req(mq, NULL);
2193}
2194
2195static void mmc_blk_mq_req_done(struct mmc_request *mrq)
2196{
2197 struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
2198 brq.mrq);
2199 struct request *req = mmc_queue_req_to_req(mqrq);
2200 struct request_queue *q = req->q;
2201 struct mmc_queue *mq = q->queuedata;
10f21df4 2202 struct mmc_host *host = mq->card->host;
81196976 2203 unsigned long flags;
81196976 2204
10f21df4
AH		 2205 if (!mmc_host_done_complete(host)) {
2206 bool waiting;
81196976 2207
10f21df4
AH		 2208 /*
2209 * We cannot complete the request in this context, so record
2210 * that there is a request to complete, and that a following
2211 * request does not need to wait (although it does need to
2212 * complete complete_req first).
2213 */
f5d72c5c 2214 spin_lock_irqsave(&mq->lock, flags);
10f21df4
AH		 2215 mq->complete_req = req;
2216 mq->rw_wait = false;
2217 waiting = mq->waiting;
f5d72c5c 2218 spin_unlock_irqrestore(&mq->lock, flags);
10f21df4
AH		 2219
2220 /*
2221 * If 'waiting' then the waiting task will complete this
2222 * request, otherwise queue a work to do it. Note that
2223 * complete_work may still race with the dispatch of a following
2224 * request.
2225 */
2226 if (waiting)
2227 wake_up(&mq->wait);
2228 else
dcf6e2e3 2229 queue_work(mq->card->complete_wq, &mq->complete_work);
10f21df4
AH		 2230
2231 return;
2232 }
2233
2234 /* Take the recovery path for errors or urgent background operations */
2235 if (mmc_blk_rq_error(&mqrq->brq) ||
2236 mmc_blk_urgent_bkops_needed(mq, mqrq)) {
f5d72c5c 2237 spin_lock_irqsave(&mq->lock, flags);
10f21df4
AH		 2238 mq->recovery_needed = true;
2239 mq->recovery_req = req;
f5d72c5c 2240 spin_unlock_irqrestore(&mq->lock, flags);
81196976 2241 wake_up(&mq->wait);
10f21df4
AH		 2242 schedule_work(&mq->recovery_work);
2243 return;
2244 }
2245
2246 mmc_blk_rw_reset_success(mq, req);
2247
2248 mq->rw_wait = false;
2249 wake_up(&mq->wait);
2250
639d3531
SAS		 2251 /* context unknown */
2252 mmc_blk_mq_post_req(mq, req, false);
81196976
AH		 2253}
2254
2255static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err)
2256{
81196976
AH		 2257 unsigned long flags;
2258 bool done;
2259
2260 /*
10f21df4
AH		 2261 * Wait while there is another request in progress, but not if recovery
2262 * is needed. Also indicate whether there is a request waiting to start.
81196976 2263 */
f5d72c5c 2264 spin_lock_irqsave(&mq->lock, flags);
10f21df4
AH		 2265 if (mq->recovery_needed) {
2266 *err = -EBUSY;
2267 done = true;
2268 } else {
2269 done = !mq->rw_wait;
2270 }
81196976 2271 mq->waiting = !done;
f5d72c5c 2272 spin_unlock_irqrestore(&mq->lock, flags);
81196976
AH		 2273
2274 return done;
2275}
2276
2277static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req)
2278{
2279 int err = 0;
2280
2281 wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err));
2282
2283 /* Always complete the previous request if there is one */
2284 mmc_blk_mq_complete_prev_req(mq, prev_req);
2285
2286 return err;
2287}
2288
2289static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq,
2290 struct request *req)
2291{
2292 struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
2293 struct mmc_host *host = mq->card->host;
2294 struct request *prev_req = NULL;
2295 int err = 0;
2296
2297 mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
2298
2299 mqrq->brq.mrq.done = mmc_blk_mq_req_done;
2300
2301 mmc_pre_req(host, &mqrq->brq.mrq);
2302
2303 err = mmc_blk_rw_wait(mq, &prev_req);
2304 if (err)
2305 goto out_post_req;
2306
2307 mq->rw_wait = true;
2308
2309 err = mmc_start_request(host, &mqrq->brq.mrq);
2310
2311 if (prev_req)
639d3531 2312 mmc_blk_mq_post_req(mq, prev_req, true);
81196976 2313
10f21df4 2314 if (err)
81196976 2315 mq->rw_wait = false;
10f21df4
AH		 2316
2317 /* Release re-tuning here where there is no synchronization required */
2318 if (err || mmc_host_done_complete(host))
81196976 2319 mmc_retune_release(host);
81196976
AH		 2320
2321out_post_req:
2322 if (err)
2323 mmc_post_req(host, &mqrq->brq.mrq, err);
2324
2325 return err;
2326}
2327
2328static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host)
2329{
407a1c57 2330 if (host->cqe_enabled)
1e8e55b6
AH		 2331 return host->cqe_ops->cqe_wait_for_idle(host);
2332
81196976
AH		 2333 return mmc_blk_rw_wait(mq, NULL);
2334}
2335
2336enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req)
2337{
2338 struct mmc_blk_data *md = mq->blkdata;
2339 struct mmc_card *card = md->queue.card;
2340 struct mmc_host *host = card->host;
2341 int ret;
2342
2343 ret = mmc_blk_part_switch(card, md->part_type);
2344 if (ret)
2345 return MMC_REQ_FAILED_TO_START;
2346
2347 switch (mmc_issue_type(mq, req)) {
2348 case MMC_ISSUE_SYNC:
2349 ret = mmc_blk_wait_for_idle(mq, host);
2350 if (ret)
2351 return MMC_REQ_BUSY;
2352 switch (req_op(req)) {
2353 case REQ_OP_DRV_IN:
2354 case REQ_OP_DRV_OUT:
2355 mmc_blk_issue_drv_op(mq, req);
2356 break;
2357 case REQ_OP_DISCARD:
2358 mmc_blk_issue_discard_rq(mq, req);
2359 break;
2360 case REQ_OP_SECURE_ERASE:
2361 mmc_blk_issue_secdiscard_rq(mq, req);
2362 break;
f7b6fc32
VW		 2363 case REQ_OP_WRITE_ZEROES:
2364 mmc_blk_issue_trim_rq(mq, req);
2365 break;
81196976
AH		 2366 case REQ_OP_FLUSH:
2367 mmc_blk_issue_flush(mq, req);
2368 break;
2369 default:
2370 WARN_ON_ONCE(1);
2371 return MMC_REQ_FAILED_TO_START;
2372 }
2373 return MMC_REQ_FINISHED;
1e8e55b6 2374 case MMC_ISSUE_DCMD:
81196976
AH		 2375 case MMC_ISSUE_ASYNC:
2376 switch (req_op(req)) {
1e8e55b6 2377 case REQ_OP_FLUSH:
97fce126
AA		 2378 if (!mmc_cache_enabled(host)) {
2379 blk_mq_end_request(req, BLK_STS_OK);
2380 return MMC_REQ_FINISHED;
2381 }
1e8e55b6
AH		 2382 ret = mmc_blk_cqe_issue_flush(mq, req);
2383 break;
81196976
AH		 2384 case REQ_OP_READ:
2385 case REQ_OP_WRITE:
407a1c57 2386 if (host->cqe_enabled)
1e8e55b6
AH		 2387 ret = mmc_blk_cqe_issue_rw_rq(mq, req);
2388 else
2389 ret = mmc_blk_mq_issue_rw_rq(mq, req);
81196976
AH		 2390 break;
2391 default:
2392 WARN_ON_ONCE(1);
2393 ret = -EINVAL;
2394 }
2395 if (!ret)
2396 return MMC_REQ_STARTED;
2397 return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START;
2398 default:
2399 WARN_ON_ONCE(1);
2400 return MMC_REQ_FAILED_TO_START;
2401 }
2402}
2403
a6f6c96b
RK		 2404static inline int mmc_blk_readonly(struct mmc_card *card)
2405{
2406 return mmc_card_readonly(card) ||
2407 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2408}
2409
371a689f
AW		 2410static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2411 struct device *parent,
2412 sector_t size,
2413 bool default_ro,
add710ea 2414 const char *subname,
a94dcfce
CH		 2415 int area_type,
2416 unsigned int part_type)
1da177e4
LT		 2417{
2418 struct mmc_blk_data *md;
2419 int devidx, ret;
ce999ed1 2420 char cap_str[10];
08ebf903
MW		 2421 bool cache_enabled = false;
2422 bool fua_enabled = false;
1da177e4 2423
a04848c7 2424 devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
e7b42769
SL		 2425 if (devidx < 0) {
2426 /*
2427 * We get -ENOSPC because there are no more any available
2428 * devidx. The reason may be that, either userspace haven't yet
2429 * unmounted the partitions, which postpones mmc_blk_release()
2430 * from being called, or the device has more partitions than
2431 * what we support.
2432 */
2433 if (devidx == -ENOSPC)
2434 dev_err(mmc_dev(card->host),
2435 "no more device IDs available\n");
2436
a04848c7 2437 return ERR_PTR(devidx);
e7b42769 2438 }
1da177e4 2439
dd00cc48 2440 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2441 if (!md) {
2442 ret = -ENOMEM;
2443 goto out;
2444 }
1da177e4 2445
add710ea
JR		 2446 md->area_type = area_type;
2447
a6f6c96b
RK		 2448 /*
2449 * Set the read-only status based on the supported commands
2450 * and the write protect switch.
2451 */
2452 md->read_only = mmc_blk_readonly(card);
1da177e4 2453
607d968a
CH		 2454 md->disk = mmc_init_queue(&md->queue, card);
2455 if (IS_ERR(md->disk)) {
2456 ret = PTR_ERR(md->disk);
a6f6c96b
RK		 2457 goto err_kfree;
2458 }
1da177e4 2459
371a689f 2460 INIT_LIST_HEAD(&md->part);
97548575 2461 INIT_LIST_HEAD(&md->rpmbs);
edb25572
SB		 2462 kref_init(&md->kref);
2463
7db3028e 2464 md->queue.blkdata = md;
a94dcfce 2465 md->part_type = part_type;
d2b18394 2466
fe6b4c88 2467 md->disk->major = MMC_BLOCK_MAJOR;
1033d103 2468 md->disk->minors = perdev_minors;
5e71b7a6 2469 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2470 md->disk->fops = &mmc_bdops;
2471 md->disk->private_data = md;
307d8e6f 2472 md->parent = parent;
371a689f 2473 set_disk_ro(md->disk, md->read_only || default_ro);
f5b4d71f 2474 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
79b0f79a 2475 md->disk->flags |= GENHD_FL_NO_PART;
a6f6c96b
RK		 2476
2477 /*
2478 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2479 *
2480 * - be set for removable media with permanent block devices
2481 * - be unset for removable block devices with permanent media
2482 *
2483 * Since MMC block devices clearly fall under the second
2484 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2485 * should use the block device creation/destruction hotplug
2486 * messages to tell when the card is present.
2487 */
2488
f06c9153 2489 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
9aaf3437 2490 "mmcblk%u%s", card->host->index, subname ? subname : "");
a6f6c96b 2491
371a689f 2492 set_capacity(md->disk, size);
d0c97cfb 2493
f0d89972 2494 if (mmc_host_cmd23(card->host)) {
0ed50abb
DG		 2495 if ((mmc_card_mmc(card) &&
2496 card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
f0d89972
AW		 2497 (mmc_card_sd(card) &&
2498 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2499 md->flags |= MMC_BLK_CMD23;
2500 }
d0c97cfb 2501
08ebf903 2502 if (md->flags & MMC_BLK_CMD23 &&
d0c97cfb
AW		 2503 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2504 card->ext_csd.rel_sectors)) {
2505 md->flags |= MMC_BLK_REL_WR;
08ebf903
MW		 2506 fua_enabled = true;
2507 cache_enabled = true;
d0c97cfb 2508 }
08ebf903
MW		 2509 if (mmc_cache_enabled(card->host))
2510 cache_enabled = true;
2511
2512 blk_queue_write_cache(md->queue.queue, cache_enabled, fua_enabled);
d0c97cfb 2513
ce999ed1
UH		 2514 string_get_size((u64)size, 512, STRING_UNITS_2,
2515 cap_str, sizeof(cap_str));
78ce88e7 2516 pr_info("%s: %s %s %s%s\n",
ce999ed1 2517 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
78ce88e7 2518 cap_str, md->read_only ? " (ro)" : "");
ce999ed1 2519
a94dcfce
CH		 2520 /* used in ->open, must be set before add_disk: */
2521 if (area_type == MMC_BLK_DATA_AREA_MAIN)
2522 dev_set_drvdata(&card->dev, md);
9c1aaec4
LC		 2523 ret = device_add_disk(md->parent, md->disk, mmc_disk_attr_groups);
2524 if (ret)
bf14fad1 2525 goto err_put_disk;
371a689f
AW		 2526 return md;
2527
bf14fad1
ML		 2528 err_put_disk:
2529 put_disk(md->disk);
9c1aaec4 2530 blk_mq_free_tag_set(&md->queue.tag_set);
371a689f
AW		 2531 err_kfree:
2532 kfree(md);
2533 out:
a04848c7 2534 ida_simple_remove(&mmc_blk_ida, devidx);
371a689f
AW		 2535 return ERR_PTR(ret);
2536}
2537
2538static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2539{
2540 sector_t size;
a6f6c96b 2541
85a18ad9
PO		 2542 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2543 /*
2544 * The EXT_CSD sector count is in number or 512 byte
2545 * sectors.
2546 */
371a689f 2547 size = card->ext_csd.sectors;
85a18ad9
PO		 2548 } else {
2549 /*
2550 * The CSD capacity field is in units of read_blkbits.
2551 * set_capacity takes units of 512 bytes.
2552 */
087de9ed
KM		 2553 size = (typeof(sector_t))card->csd.capacity
2554 << (card->csd.read_blkbits - 9);
85a18ad9 2555 }
371a689f 2556
7a30f2af 2557 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
a94dcfce 2558 MMC_BLK_DATA_AREA_MAIN, 0);
371a689f 2559}
a6f6c96b 2560
371a689f
AW		 2561static int mmc_blk_alloc_part(struct mmc_card *card,
2562 struct mmc_blk_data *md,
2563 unsigned int part_type,
2564 sector_t size,
2565 bool default_ro,
add710ea
JR		 2566 const char *subname,
2567 int area_type)
371a689f 2568{
371a689f
AW		 2569 struct mmc_blk_data *part_md;
2570
2571 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
a94dcfce 2572 subname, area_type, part_type);
371a689f
AW		 2573 if (IS_ERR(part_md))
2574 return PTR_ERR(part_md);
371a689f
AW		 2575 list_add(&part_md->part, &md->part);
2576
371a689f
AW		 2577 return 0;
2578}
2579
97548575
LW		 2580/**
2581 * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev
2582 * @filp: the character device file
2583 * @cmd: the ioctl() command
2584 * @arg: the argument from userspace
2585 *
2586 * This will essentially just redirect the ioctl()s coming in over to
2587 * the main block device spawning the RPMB character device.
2588 */
2589static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
2590 unsigned long arg)
2591{
2592 struct mmc_rpmb_data *rpmb = filp->private_data;
2593 int ret;
2594
2595 switch (cmd) {
2596 case MMC_IOC_CMD:
2597 ret = mmc_blk_ioctl_cmd(rpmb->md,
2598 (struct mmc_ioc_cmd __user *)arg,
2599 rpmb);
2600 break;
2601 case MMC_IOC_MULTI_CMD:
2602 ret = mmc_blk_ioctl_multi_cmd(rpmb->md,
2603 (struct mmc_ioc_multi_cmd __user *)arg,
2604 rpmb);
2605 break;
2606 default:
2607 ret = -EINVAL;
2608 break;
2609 }
2610
b25b750d 2611 return ret;
97548575
LW		 2612}
2613
2614#ifdef CONFIG_COMPAT
2615static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd,
2616 unsigned long arg)
2617{
2618 return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2619}
2620#endif
2621
2622static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp)
2623{
2624 struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
2625 struct mmc_rpmb_data, chrdev);
2626
2627 get_device(&rpmb->dev);
2628 filp->private_data = rpmb;
1c87f735 2629 mmc_blk_get(rpmb->md->disk);
97548575
LW		 2630
2631 return nonseekable_open(inode, filp);
2632}
2633
2634static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
2635{
2636 struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
2637 struct mmc_rpmb_data, chrdev);
2638
1c87f735 2639 mmc_blk_put(rpmb->md);
202500d2 2640 put_device(&rpmb->dev);
97548575
LW		 2641
2642 return 0;
2643}
2644
2645static const struct file_operations mmc_rpmb_fileops = {
2646 .release = mmc_rpmb_chrdev_release,
2647 .open = mmc_rpmb_chrdev_open,
2648 .owner = THIS_MODULE,
2649 .llseek = no_llseek,
2650 .unlocked_ioctl = mmc_rpmb_ioctl,
2651#ifdef CONFIG_COMPAT
2652 .compat_ioctl = mmc_rpmb_ioctl_compat,
2653#endif
2654};
2655
1c87f735
LW		 2656static void mmc_blk_rpmb_device_release(struct device *dev)
2657{
2658 struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
2659
2660 ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
2661 kfree(rpmb);
2662}
97548575
LW		 2663
2664static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
2665 struct mmc_blk_data *md,
2666 unsigned int part_index,
2667 sector_t size,
2668 const char *subname)
2669{
2670 int devidx, ret;
2671 char rpmb_name[DISK_NAME_LEN];
2672 char cap_str[10];
2673 struct mmc_rpmb_data *rpmb;
2674
2675 /* This creates the minor number for the RPMB char device */
2676 devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
2677 if (devidx < 0)
2678 return devidx;
2679
2680 rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
1c87f735
LW		 2681 if (!rpmb) {
2682 ida_simple_remove(&mmc_rpmb_ida, devidx);
97548575 2683 return -ENOMEM;
1c87f735 2684 }
97548575
LW		 2685
2686 snprintf(rpmb_name, sizeof(rpmb_name),
2687 "mmcblk%u%s", card->host->index, subname ? subname : "");
2688
2689 rpmb->id = devidx;
2690 rpmb->part_index = part_index;
2691 rpmb->dev.init_name = rpmb_name;
2692 rpmb->dev.bus = &mmc_rpmb_bus_type;
2693 rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id);
2694 rpmb->dev.parent = &card->dev;
1c87f735 2695 rpmb->dev.release = mmc_blk_rpmb_device_release;
97548575
LW		 2696 device_initialize(&rpmb->dev);
2697 dev_set_drvdata(&rpmb->dev, rpmb);
2698 rpmb->md = md;
2699
2700 cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops);
2701 rpmb->chrdev.owner = THIS_MODULE;
2702 ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev);
2703 if (ret) {
2704 pr_err("%s: could not add character device\n", rpmb_name);
1c87f735 2705 goto out_put_device;
97548575
LW		 2706 }
2707
2708 list_add(&rpmb->node, &md->rpmbs);
2709
2710 string_get_size((u64)size, 512, STRING_UNITS_2,
2711 cap_str, sizeof(cap_str));
2712
ce999ed1
UH		 2713 pr_info("%s: %s %s %s, chardev (%d:%d)\n",
2714 rpmb_name, mmc_card_id(card), mmc_card_name(card), cap_str,
97548575
LW		 2715 MAJOR(mmc_rpmb_devt), rpmb->id);
2716
2717 return 0;
2718
1c87f735
LW		 2719out_put_device:
2720 put_device(&rpmb->dev);
97548575
LW		 2721 return ret;
2722}
2723
2724static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb)
1c87f735 2725
97548575
LW		 2726{
2727 cdev_device_del(&rpmb->chrdev, &rpmb->dev);
1c87f735 2728 put_device(&rpmb->dev);
97548575
LW		 2729}
2730
e0c368d5
NJ		 2731/* MMC Physical partitions consist of two boot partitions and
2732 * up to four general purpose partitions.
2733 * For each partition enabled in EXT_CSD a block device will be allocatedi
2734 * to provide access to the partition.
2735 */
2736
371a689f
AW		 2737static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2738{
97548575 2739 int idx, ret;
371a689f
AW		 2740
2741 if (!mmc_card_mmc(card))
2742 return 0;
2743
e0c368d5 2744 for (idx = 0; idx < card->nr_parts; idx++) {
97548575
LW		 2745 if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) {
2746 /*
2747 * RPMB partitions does not provide block access, they
2748 * are only accessed using ioctl():s. Thus create
2749 * special RPMB block devices that do not have a
2750 * backing block queue for these.
2751 */
2752 ret = mmc_blk_alloc_rpmb_part(card, md,
2753 card->part[idx].part_cfg,
2754 card->part[idx].size >> 9,
2755 card->part[idx].name);
2756 if (ret)
2757 return ret;
2758 } else if (card->part[idx].size) {
e0c368d5
NJ		 2759 ret = mmc_blk_alloc_part(card, md,
2760 card->part[idx].part_cfg,
2761 card->part[idx].size >> 9,
2762 card->part[idx].force_ro,
add710ea
JR		 2763 card->part[idx].name,
2764 card->part[idx].area_type);
e0c368d5
NJ		 2765 if (ret)
2766 return ret;
2767 }
371a689f
AW		 2768 }
2769
97548575 2770 return 0;
1da177e4
LT		 2771}
2772
371a689f
AW		 2773static void mmc_blk_remove_req(struct mmc_blk_data *md)
2774{
a94dcfce
CH		 2775 /*
2776 * Flush remaining requests and free queues. It is freeing the queue
2777 * that stops new requests from being accepted.
2778 */
2779 del_gendisk(md->disk);
2780 mmc_cleanup_queue(&md->queue);
2781 mmc_blk_put(md);
371a689f
AW		 2782}
2783
2784static void mmc_blk_remove_parts(struct mmc_card *card,
2785 struct mmc_blk_data *md)
2786{
2787 struct list_head *pos, *q;
2788 struct mmc_blk_data *part_md;
97548575 2789 struct mmc_rpmb_data *rpmb;
371a689f 2790
97548575
LW		 2791 /* Remove RPMB partitions */
2792 list_for_each_safe(pos, q, &md->rpmbs) {
2793 rpmb = list_entry(pos, struct mmc_rpmb_data, node);
2794 list_del(pos);
2795 mmc_blk_remove_rpmb_part(rpmb);
2796 }
2797 /* Remove block partitions */
371a689f
AW		 2798 list_for_each_safe(pos, q, &md->part) {
2799 part_md = list_entry(pos, struct mmc_blk_data, part);
2800 list_del(pos);
2801 mmc_blk_remove_req(part_md);
2802 }
2803}
2804
627c3ccf
LW		 2805#ifdef CONFIG_DEBUG_FS
2806
2807static int mmc_dbg_card_status_get(void *data, u64 *val)
2808{
2809 struct mmc_card *card = data;
2810 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2811 struct mmc_queue *mq = &md->queue;
2812 struct request *req;
2813 int ret;
2814
2815 /* Ask the block layer about the card status */
0bf6d96c 2816 req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0);
fb8e456e
AH		 2817 if (IS_ERR(req))
2818 return PTR_ERR(req);
627c3ccf 2819 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
003fb0a5 2820 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
b84ba30b 2821 blk_execute_rq(req, false);
627c3ccf
LW		 2822 ret = req_to_mmc_queue_req(req)->drv_op_result;
2823 if (ret >= 0) {
2824 *val = ret;
2825 ret = 0;
2826 }
0bf6d96c 2827 blk_mq_free_request(req);
627c3ccf
LW		 2828
2829 return ret;
2830}
f6a3d9d9
Y		 2831DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
2832 NULL, "%08llx\n");
627c3ccf
LW		 2833
2834/* That is two digits * 512 + 1 for newline */
2835#define EXT_CSD_STR_LEN 1025
2836
2837static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
2838{
2839 struct mmc_card *card = inode->i_private;
2840 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2841 struct mmc_queue *mq = &md->queue;
2842 struct request *req;
2843 char *buf;
2844 ssize_t n = 0;
2845 u8 *ext_csd;
2846 int err, i;
2847
2848 buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
2849 if (!buf)
2850 return -ENOMEM;
2851
2852 /* Ask the block layer for the EXT CSD */
0bf6d96c 2853 req = blk_mq_alloc_request(mq->queue, REQ_OP_DRV_IN, 0);
fb8e456e
AH		 2854 if (IS_ERR(req)) {
2855 err = PTR_ERR(req);
2856 goto out_free;
2857 }
627c3ccf 2858 req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD;
003fb0a5 2859 req_to_mmc_queue_req(req)->drv_op_result = -EIO;
627c3ccf 2860 req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
b84ba30b 2861 blk_execute_rq(req, false);
627c3ccf 2862 err = req_to_mmc_queue_req(req)->drv_op_result;
0bf6d96c 2863 blk_mq_free_request(req);
627c3ccf
LW		 2864 if (err) {
2865 pr_err("FAILED %d\n", err);
2866 goto out_free;
2867 }
2868
2869 for (i = 0; i < 512; i++)
2870 n += sprintf(buf + n, "%02x", ext_csd[i]);
2871 n += sprintf(buf + n, "\n");
2872
2873 if (n != EXT_CSD_STR_LEN) {
2874 err = -EINVAL;
0be55579 2875 kfree(ext_csd);
627c3ccf
LW		 2876 goto out_free;
2877 }
2878
2879 filp->private_data = buf;
2880 kfree(ext_csd);
2881 return 0;
2882
2883out_free:
2884 kfree(buf);
2885 return err;
2886}
2887
2888static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
2889 size_t cnt, loff_t *ppos)
2890{
2891 char *buf = filp->private_data;
2892
2893 return simple_read_from_buffer(ubuf, cnt, ppos,
2894 buf, EXT_CSD_STR_LEN);
2895}
2896
2897static int mmc_ext_csd_release(struct inode *inode, struct file *file)
2898{
2899 kfree(file->private_data);
2900 return 0;
2901}
2902
2903static const struct file_operations mmc_dbg_ext_csd_fops = {
2904 .open = mmc_ext_csd_open,
2905 .read = mmc_ext_csd_read,
2906 .release = mmc_ext_csd_release,
2907 .llseek = default_llseek,
2908};
2909
584f5488 2910static void mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
627c3ccf
LW		 2911{
2912 struct dentry *root;
2913
2914 if (!card->debugfs_root)
584f5488 2915 return;
627c3ccf
LW		 2916
2917 root = card->debugfs_root;
2918
2919 if (mmc_card_mmc(card) || mmc_card_sd(card)) {
f9f0da98 2920 md->status_dentry =
f6a3d9d9
Y		 2921 debugfs_create_file_unsafe("status", 0400, root,
2922 card,
2923 &mmc_dbg_card_status_fops);
627c3ccf
LW		 2924 }
2925
2926 if (mmc_card_mmc(card)) {
f9f0da98
AH		 2927 md->ext_csd_dentry =
2928 debugfs_create_file("ext_csd", S_IRUSR, root, card,
2929 &mmc_dbg_ext_csd_fops);
627c3ccf 2930 }
627c3ccf
LW		 2931}
2932
f9f0da98
AH		 2933static void mmc_blk_remove_debugfs(struct mmc_card *card,
2934 struct mmc_blk_data *md)
2935{
2936 if (!card->debugfs_root)
2937 return;
2938
584f5488
YF		 2939 debugfs_remove(md->status_dentry);
2940 md->status_dentry = NULL;
f9f0da98 2941
584f5488
YF		 2942 debugfs_remove(md->ext_csd_dentry);
2943 md->ext_csd_dentry = NULL;
f9f0da98 2944}
627c3ccf
LW		 2945
2946#else
2947
584f5488 2948static void mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
627c3ccf 2949{
627c3ccf
LW		 2950}
2951
f9f0da98
AH		 2952static void mmc_blk_remove_debugfs(struct mmc_card *card,
2953 struct mmc_blk_data *md)
2954{
2955}
2956
627c3ccf
LW		 2957#endif /* CONFIG_DEBUG_FS */
2958
96541bac 2959static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2960{
a94dcfce 2961 struct mmc_blk_data *md;
6f1d3247 2962 int ret = 0;
a7bbb573 2963
912490db
PO		 2964 /*
2965 * Check that the card supports the command class(es) we need.
2966 */
2967 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2968 return -ENODEV;
2969
8c7cdbf9 2970 mmc_fixup_device(card, mmc_blk_fixups);
5204d00f 2971
dcf6e2e3
ZH		 2972 card->complete_wq = alloc_workqueue("mmc_complete",
2973 WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
1d848c28 2974 if (!card->complete_wq) {
dcf6e2e3
ZH		 2975 pr_err("Failed to create mmc completion workqueue");
2976 return -ENOMEM;
2977 }
2978
1da177e4 2979 md = mmc_blk_alloc(card);
6f1d3247
UH		 2980 if (IS_ERR(md)) {
2981 ret = PTR_ERR(md);
2982 goto out_free;
2983 }
1da177e4 2984
6f1d3247
UH		 2985 ret = mmc_blk_alloc_parts(card, md);
2986 if (ret)
371a689f
AW		 2987 goto out;
2988
627c3ccf 2989 /* Add two debugfs entries */
f9f0da98 2990 mmc_blk_add_debugfs(card, md);
627c3ccf 2991
e94cfef6
UH		 2992 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2993 pm_runtime_use_autosuspend(&card->dev);
2994
2995 /*
2996 * Don't enable runtime PM for SD-combo cards here. Leave that
2997 * decision to be taken during the SDIO init sequence instead.
2998 */
3beb0ab5 2999 if (!mmc_card_sd_combo(card)) {
e94cfef6
UH		 3000 pm_runtime_set_active(&card->dev);
3001 pm_runtime_enable(&card->dev);
3002 }
3003
1da177e4
LT		 3004 return 0;
3005
6f1d3247 3006out:
371a689f
AW		 3007 mmc_blk_remove_parts(card, md);
3008 mmc_blk_remove_req(md);
6f1d3247
UH		 3009out_free:
3010 destroy_workqueue(card->complete_wq);
3011 return ret;
1da177e4
LT		 3012}
3013
96541bac 3014static void mmc_blk_remove(struct mmc_card *card)
1da177e4 3015{
96541bac 3016 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 3017
f9f0da98 3018 mmc_blk_remove_debugfs(card, md);
371a689f 3019 mmc_blk_remove_parts(card, md);
e94cfef6 3020 pm_runtime_get_sync(&card->dev);
65f9e20e
SL		 3021 if (md->part_curr != md->part_type) {
3022 mmc_claim_host(card->host);
3023 mmc_blk_part_switch(card, md->part_type);
3024 mmc_release_host(card->host);
3025 }
3beb0ab5 3026 if (!mmc_card_sd_combo(card))
e94cfef6
UH		 3027 pm_runtime_disable(&card->dev);
3028 pm_runtime_put_noidle(&card->dev);
371a689f 3029 mmc_blk_remove_req(md);
dcf6e2e3 3030 destroy_workqueue(card->complete_wq);
1da177e4
LT		 3031}
3032
96541bac 3033static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 3034{
371a689f 3035 struct mmc_blk_data *part_md;
96541bac 3036 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 3037
3038 if (md) {
3039 mmc_queue_suspend(&md->queue);
371a689f
AW		 3040 list_for_each_entry(part_md, &md->part, part) {
3041 mmc_queue_suspend(&part_md->queue);
3042 }
1da177e4
LT		 3043 }
3044 return 0;
3045}
3046
96541bac 3047static void mmc_blk_shutdown(struct mmc_card *card)
76287748 3048{
96541bac 3049 _mmc_blk_suspend(card);
76287748
UH		 3050}
3051
0967edc6
UH		 3052#ifdef CONFIG_PM_SLEEP
3053static int mmc_blk_suspend(struct device *dev)
76287748 3054{
96541bac
UH		 3055 struct mmc_card *card = mmc_dev_to_card(dev);
3056
3057 return _mmc_blk_suspend(card);
76287748
UH		 3058}
3059
0967edc6 3060static int mmc_blk_resume(struct device *dev)
1da177e4 3061{
371a689f 3062 struct mmc_blk_data *part_md;
fc95e30b 3063 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 3064
3065 if (md) {
371a689f
AW		 3066 /*
3067 * Resume involves the card going into idle state,
3068 * so current partition is always the main one.
3069 */
3070 md->part_curr = md->part_type;
1da177e4 3071 mmc_queue_resume(&md->queue);
371a689f
AW		 3072 list_for_each_entry(part_md, &md->part, part) {
3073 mmc_queue_resume(&part_md->queue);
3074 }
1da177e4
LT		 3075 }
3076 return 0;
3077}
1da177e4
LT		 3078#endif
3079
0967edc6
UH		 3080static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
3081
96541bac
UH		 3082static struct mmc_driver mmc_driver = {
3083 .drv = {
3084 .name = "mmcblk",
3085 .pm = &mmc_blk_pm_ops,
3086 },
1da177e4
LT		 3087 .probe = mmc_blk_probe,
3088 .remove = mmc_blk_remove,
76287748 3089 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 3090};
3091
3092static int __init mmc_blk_init(void)
3093{
9d4e98e9 3094 int res;
1da177e4 3095
97548575
LW		 3096 res = bus_register(&mmc_rpmb_bus_type);
3097 if (res < 0) {
3098 pr_err("mmcblk: could not register RPMB bus type\n");
3099 return res;
3100 }
3101 res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb");
3102 if (res < 0) {
3103 pr_err("mmcblk: failed to allocate rpmb chrdev region\n");
3104 goto out_bus_unreg;
3105 }
3106
5e71b7a6
OJ		 3107 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
3108 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
3109
a26eba61 3110 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 3111
fe6b4c88
PO		 3112 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
3113 if (res)
97548575 3114 goto out_chrdev_unreg;
1da177e4 3115
9d4e98e9
AM		 3116 res = mmc_register_driver(&mmc_driver);
3117 if (res)
97548575 3118 goto out_blkdev_unreg;
1da177e4 3119
9d4e98e9 3120 return 0;
97548575
LW		 3121
3122out_blkdev_unreg:
9d4e98e9 3123 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
97548575
LW		 3124out_chrdev_unreg:
3125 unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
3126out_bus_unreg:
3127 bus_unregister(&mmc_rpmb_bus_type);
1da177e4
LT		 3128 return res;
3129}
3130
3131static void __exit mmc_blk_exit(void)
3132{
3133 mmc_unregister_driver(&mmc_driver);
fe6b4c88 3134 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
97548575 3135 unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
d0a0852b 3136 bus_unregister(&mmc_rpmb_bus_type);
1da177e4
LT		 3137}
3138
3139module_init(mmc_blk_init);
3140module_exit(mmc_blk_exit);
3141
3142MODULE_LICENSE("GPL");
3143MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
3144
Linux 6.x block layer and io_uring tree(s)