Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Block driver for media (i.e., flash cards) | |
3 | * | |
4 | * Copyright 2002 Hewlett-Packard Company | |
979ce720 | 5 | * Copyright 2005-2008 Pierre Ossman |
1da177e4 LT |
6 | * |
7 | * Use consistent with the GNU GPL is permitted, | |
8 | * provided that this copyright notice is | |
9 | * preserved in its entirety in all copies and derived works. | |
10 | * | |
11 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |
12 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |
13 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |
14 | * | |
15 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |
16 | * | |
17 | * Author: Andrew Christian | |
18 | * 28 May 2002 | |
19 | */ | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/fs.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/hdreg.h> | |
29 | #include <linux/kdev_t.h> | |
30 | #include <linux/blkdev.h> | |
a621aaed | 31 | #include <linux/mutex.h> |
ec5a19dd | 32 | #include <linux/scatterlist.h> |
a7bbb573 | 33 | #include <linux/string_helpers.h> |
cb87ea28 JC |
34 | #include <linux/delay.h> |
35 | #include <linux/capability.h> | |
36 | #include <linux/compat.h> | |
e94cfef6 | 37 | #include <linux/pm_runtime.h> |
b10fa99e | 38 | #include <linux/idr.h> |
1da177e4 | 39 | |
cb87ea28 | 40 | #include <linux/mmc/ioctl.h> |
1da177e4 | 41 | #include <linux/mmc/card.h> |
385e3227 | 42 | #include <linux/mmc/host.h> |
da7fbe58 PO |
43 | #include <linux/mmc/mmc.h> |
44 | #include <linux/mmc/sd.h> | |
1da177e4 | 45 | |
7c0f6ba6 | 46 | #include <linux/uaccess.h> |
1da177e4 | 47 | |
98ac2162 | 48 | #include "queue.h" |
48ab086d | 49 | #include "block.h" |
55244c56 | 50 | #include "core.h" |
4facdde1 | 51 | #include "card.h" |
5857b29b | 52 | #include "host.h" |
4facdde1 | 53 | #include "bus.h" |
55244c56 | 54 | #include "mmc_ops.h" |
28fc64af | 55 | #include "quirks.h" |
55244c56 | 56 | #include "sd_ops.h" |
1da177e4 | 57 | |
6b0b6285 | 58 | MODULE_ALIAS("mmc:block"); |
5e71b7a6 OJ |
59 | #ifdef MODULE_PARAM_PREFIX |
60 | #undef MODULE_PARAM_PREFIX | |
61 | #endif | |
62 | #define MODULE_PARAM_PREFIX "mmcblk." | |
63 | ||
8fee476b | 64 | #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ |
775a9362 ME |
65 | #define MMC_SANITIZE_REQ_TIMEOUT 240000 |
66 | #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) | |
6a7a6b45 | 67 | |
d3df0465 | 68 | #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \ |
ce39f9d1 | 69 | (rq_data_dir(req) == WRITE)) |
5e71b7a6 | 70 | static DEFINE_MUTEX(block_mutex); |
6b0b6285 | 71 | |
1da177e4 | 72 | /* |
5e71b7a6 OJ |
73 | * The defaults come from config options but can be overriden by module |
74 | * or bootarg options. | |
1da177e4 | 75 | */ |
5e71b7a6 | 76 | static int perdev_minors = CONFIG_MMC_BLOCK_MINORS; |
1dff3144 | 77 | |
5e71b7a6 OJ |
78 | /* |
79 | * We've only got one major, so number of mmcblk devices is | |
a26eba61 | 80 | * limited to (1 << 20) / number of minors per device. It is also |
b10fa99e | 81 | * limited by the MAX_DEVICES below. |
5e71b7a6 OJ |
82 | */ |
83 | static int max_devices; | |
84 | ||
a26eba61 BH |
85 | #define MAX_DEVICES 256 |
86 | ||
b10fa99e | 87 | static DEFINE_IDA(mmc_blk_ida); |
1da177e4 | 88 | |
1da177e4 LT |
89 | /* |
90 | * There is one mmc_blk_data per slot. | |
91 | */ | |
92 | struct mmc_blk_data { | |
93 | spinlock_t lock; | |
307d8e6f | 94 | struct device *parent; |
1da177e4 LT |
95 | struct gendisk *disk; |
96 | struct mmc_queue queue; | |
371a689f | 97 | struct list_head part; |
1da177e4 | 98 | |
d0c97cfb AW |
99 | unsigned int flags; |
100 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
101 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
102 | ||
1da177e4 | 103 | unsigned int usage; |
a6f6c96b | 104 | unsigned int read_only; |
371a689f | 105 | unsigned int part_type; |
67716327 AH |
106 | unsigned int reset_done; |
107 | #define MMC_BLK_READ BIT(0) | |
108 | #define MMC_BLK_WRITE BIT(1) | |
109 | #define MMC_BLK_DISCARD BIT(2) | |
110 | #define MMC_BLK_SECDISCARD BIT(3) | |
371a689f AW |
111 | |
112 | /* | |
113 | * Only set in main mmc_blk_data associated | |
fc95e30b | 114 | * with mmc_card with dev_set_drvdata, and keeps |
371a689f AW |
115 | * track of the current selected device partition. |
116 | */ | |
117 | unsigned int part_curr; | |
118 | struct device_attribute force_ro; | |
add710ea JR |
119 | struct device_attribute power_ro_lock; |
120 | int area_type; | |
1da177e4 LT |
121 | }; |
122 | ||
a621aaed | 123 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 124 | |
5e71b7a6 OJ |
125 | module_param(perdev_minors, int, 0444); |
126 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
127 | ||
8d1e977d LP |
128 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
129 | struct mmc_blk_data *md); | |
130 | static int get_card_status(struct mmc_card *card, u32 *status, int retries); | |
131 | ||
1da177e4 LT |
132 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
133 | { | |
134 | struct mmc_blk_data *md; | |
135 | ||
a621aaed | 136 | mutex_lock(&open_lock); |
1da177e4 LT |
137 | md = disk->private_data; |
138 | if (md && md->usage == 0) | |
139 | md = NULL; | |
140 | if (md) | |
141 | md->usage++; | |
a621aaed | 142 | mutex_unlock(&open_lock); |
1da177e4 LT |
143 | |
144 | return md; | |
145 | } | |
146 | ||
371a689f AW |
147 | static inline int mmc_get_devidx(struct gendisk *disk) |
148 | { | |
382c55f8 | 149 | int devidx = disk->first_minor / perdev_minors; |
371a689f AW |
150 | return devidx; |
151 | } | |
152 | ||
1da177e4 LT |
153 | static void mmc_blk_put(struct mmc_blk_data *md) |
154 | { | |
a621aaed | 155 | mutex_lock(&open_lock); |
1da177e4 LT |
156 | md->usage--; |
157 | if (md->usage == 0) { | |
371a689f | 158 | int devidx = mmc_get_devidx(md->disk); |
5fa83ce2 | 159 | blk_cleanup_queue(md->queue.queue); |
a04848c7 | 160 | ida_simple_remove(&mmc_blk_ida, devidx); |
1da177e4 | 161 | put_disk(md->disk); |
1da177e4 LT |
162 | kfree(md); |
163 | } | |
a621aaed | 164 | mutex_unlock(&open_lock); |
1da177e4 LT |
165 | } |
166 | ||
add710ea JR |
167 | static ssize_t power_ro_lock_show(struct device *dev, |
168 | struct device_attribute *attr, char *buf) | |
169 | { | |
170 | int ret; | |
171 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
172 | struct mmc_card *card = md->queue.card; | |
173 | int locked = 0; | |
174 | ||
175 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN) | |
176 | locked = 2; | |
177 | else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) | |
178 | locked = 1; | |
179 | ||
180 | ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); | |
181 | ||
9098f84c TW |
182 | mmc_blk_put(md); |
183 | ||
add710ea JR |
184 | return ret; |
185 | } | |
186 | ||
187 | static ssize_t power_ro_lock_store(struct device *dev, | |
188 | struct device_attribute *attr, const char *buf, size_t count) | |
189 | { | |
190 | int ret; | |
191 | struct mmc_blk_data *md, *part_md; | |
192 | struct mmc_card *card; | |
0493f6fe LW |
193 | struct mmc_queue *mq; |
194 | struct request *req; | |
add710ea JR |
195 | unsigned long set; |
196 | ||
197 | if (kstrtoul(buf, 0, &set)) | |
198 | return -EINVAL; | |
199 | ||
200 | if (set != 1) | |
201 | return count; | |
202 | ||
203 | md = mmc_blk_get(dev_to_disk(dev)); | |
0493f6fe | 204 | mq = &md->queue; |
add710ea JR |
205 | card = md->queue.card; |
206 | ||
0493f6fe LW |
207 | /* Dispatch locking to the block layer */ |
208 | req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, __GFP_RECLAIM); | |
209 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; | |
210 | blk_execute_rq(mq->queue, NULL, req, 0); | |
211 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
add710ea JR |
212 | |
213 | if (!ret) { | |
214 | pr_info("%s: Locking boot partition ro until next power on\n", | |
215 | md->disk->disk_name); | |
216 | set_disk_ro(md->disk, 1); | |
217 | ||
218 | list_for_each_entry(part_md, &md->part, part) | |
219 | if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) { | |
220 | pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name); | |
221 | set_disk_ro(part_md->disk, 1); | |
222 | } | |
223 | } | |
224 | ||
225 | mmc_blk_put(md); | |
226 | return count; | |
227 | } | |
228 | ||
371a689f AW |
229 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
230 | char *buf) | |
231 | { | |
232 | int ret; | |
233 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
234 | ||
0031a98a | 235 | ret = snprintf(buf, PAGE_SIZE, "%d\n", |
371a689f AW |
236 | get_disk_ro(dev_to_disk(dev)) ^ |
237 | md->read_only); | |
238 | mmc_blk_put(md); | |
239 | return ret; | |
240 | } | |
241 | ||
242 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
243 | const char *buf, size_t count) | |
244 | { | |
245 | int ret; | |
246 | char *end; | |
247 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
248 | unsigned long set = simple_strtoul(buf, &end, 0); | |
249 | if (end == buf) { | |
250 | ret = -EINVAL; | |
251 | goto out; | |
252 | } | |
253 | ||
254 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
255 | ret = count; | |
256 | out: | |
257 | mmc_blk_put(md); | |
258 | return ret; | |
259 | } | |
260 | ||
a5a1561f | 261 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 262 | { |
a5a1561f | 263 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
264 | int ret = -ENXIO; |
265 | ||
2a48fc0a | 266 | mutex_lock(&block_mutex); |
1da177e4 LT |
267 | if (md) { |
268 | if (md->usage == 2) | |
a5a1561f | 269 | check_disk_change(bdev); |
1da177e4 | 270 | ret = 0; |
a00fc090 | 271 | |
a5a1561f | 272 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 273 | mmc_blk_put(md); |
a00fc090 | 274 | ret = -EROFS; |
70bb0896 | 275 | } |
1da177e4 | 276 | } |
2a48fc0a | 277 | mutex_unlock(&block_mutex); |
1da177e4 LT |
278 | |
279 | return ret; | |
280 | } | |
281 | ||
db2a144b | 282 | static void mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 283 | { |
a5a1561f | 284 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 285 | |
2a48fc0a | 286 | mutex_lock(&block_mutex); |
1da177e4 | 287 | mmc_blk_put(md); |
2a48fc0a | 288 | mutex_unlock(&block_mutex); |
1da177e4 LT |
289 | } |
290 | ||
291 | static int | |
a885c8c4 | 292 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 293 | { |
a885c8c4 CH |
294 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
295 | geo->heads = 4; | |
296 | geo->sectors = 16; | |
297 | return 0; | |
1da177e4 LT |
298 | } |
299 | ||
cb87ea28 JC |
300 | struct mmc_blk_ioc_data { |
301 | struct mmc_ioc_cmd ic; | |
302 | unsigned char *buf; | |
303 | u64 buf_bytes; | |
304 | }; | |
305 | ||
306 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
307 | struct mmc_ioc_cmd __user *user) | |
308 | { | |
309 | struct mmc_blk_ioc_data *idata; | |
310 | int err; | |
311 | ||
1ff8950c | 312 | idata = kmalloc(sizeof(*idata), GFP_KERNEL); |
cb87ea28 JC |
313 | if (!idata) { |
314 | err = -ENOMEM; | |
aea253ec | 315 | goto out; |
cb87ea28 JC |
316 | } |
317 | ||
318 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
319 | err = -EFAULT; | |
aea253ec | 320 | goto idata_err; |
cb87ea28 JC |
321 | } |
322 | ||
323 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
324 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
325 | err = -EOVERFLOW; | |
aea253ec | 326 | goto idata_err; |
cb87ea28 JC |
327 | } |
328 | ||
bfe5b1b1 VV |
329 | if (!idata->buf_bytes) { |
330 | idata->buf = NULL; | |
4d6144de | 331 | return idata; |
bfe5b1b1 | 332 | } |
4d6144de | 333 | |
1ff8950c | 334 | idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL); |
cb87ea28 JC |
335 | if (!idata->buf) { |
336 | err = -ENOMEM; | |
aea253ec | 337 | goto idata_err; |
cb87ea28 JC |
338 | } |
339 | ||
340 | if (copy_from_user(idata->buf, (void __user *)(unsigned long) | |
341 | idata->ic.data_ptr, idata->buf_bytes)) { | |
342 | err = -EFAULT; | |
343 | goto copy_err; | |
344 | } | |
345 | ||
346 | return idata; | |
347 | ||
348 | copy_err: | |
349 | kfree(idata->buf); | |
aea253ec | 350 | idata_err: |
cb87ea28 | 351 | kfree(idata); |
aea253ec | 352 | out: |
cb87ea28 | 353 | return ERR_PTR(err); |
cb87ea28 JC |
354 | } |
355 | ||
a5f5774c JH |
356 | static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, |
357 | struct mmc_blk_ioc_data *idata) | |
358 | { | |
359 | struct mmc_ioc_cmd *ic = &idata->ic; | |
360 | ||
361 | if (copy_to_user(&(ic_ptr->response), ic->response, | |
362 | sizeof(ic->response))) | |
363 | return -EFAULT; | |
364 | ||
365 | if (!idata->ic.write_flag) { | |
366 | if (copy_to_user((void __user *)(unsigned long)ic->data_ptr, | |
367 | idata->buf, idata->buf_bytes)) | |
368 | return -EFAULT; | |
369 | } | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
8d1e977d LP |
374 | static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status, |
375 | u32 retries_max) | |
376 | { | |
377 | int err; | |
378 | u32 retry_count = 0; | |
379 | ||
380 | if (!status || !retries_max) | |
381 | return -EINVAL; | |
382 | ||
383 | do { | |
384 | err = get_card_status(card, status, 5); | |
385 | if (err) | |
386 | break; | |
387 | ||
388 | if (!R1_STATUS(*status) && | |
389 | (R1_CURRENT_STATE(*status) != R1_STATE_PRG)) | |
390 | break; /* RPMB programming operation complete */ | |
391 | ||
392 | /* | |
393 | * Rechedule to give the MMC device a chance to continue | |
394 | * processing the previous command without being polled too | |
395 | * frequently. | |
396 | */ | |
397 | usleep_range(1000, 5000); | |
398 | } while (++retry_count < retries_max); | |
399 | ||
400 | if (retry_count == retries_max) | |
401 | err = -EPERM; | |
402 | ||
403 | return err; | |
404 | } | |
405 | ||
775a9362 ME |
406 | static int ioctl_do_sanitize(struct mmc_card *card) |
407 | { | |
408 | int err; | |
409 | ||
a2d1086d | 410 | if (!mmc_can_sanitize(card)) { |
775a9362 ME |
411 | pr_warn("%s: %s - SANITIZE is not supported\n", |
412 | mmc_hostname(card->host), __func__); | |
413 | err = -EOPNOTSUPP; | |
414 | goto out; | |
415 | } | |
416 | ||
417 | pr_debug("%s: %s - SANITIZE IN PROGRESS...\n", | |
418 | mmc_hostname(card->host), __func__); | |
419 | ||
420 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
421 | EXT_CSD_SANITIZE_START, 1, | |
422 | MMC_SANITIZE_REQ_TIMEOUT); | |
423 | ||
424 | if (err) | |
425 | pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n", | |
426 | mmc_hostname(card->host), __func__, err); | |
427 | ||
428 | pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host), | |
429 | __func__); | |
430 | out: | |
431 | return err; | |
432 | } | |
433 | ||
a5f5774c JH |
434 | static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, |
435 | struct mmc_blk_ioc_data *idata) | |
cb87ea28 | 436 | { |
c7836d15 MY |
437 | struct mmc_command cmd = {}; |
438 | struct mmc_data data = {}; | |
439 | struct mmc_request mrq = {}; | |
cb87ea28 JC |
440 | struct scatterlist sg; |
441 | int err; | |
829043c4 | 442 | bool is_rpmb = false; |
8d1e977d | 443 | u32 status = 0; |
cb87ea28 | 444 | |
a5f5774c JH |
445 | if (!card || !md || !idata) |
446 | return -EINVAL; | |
cb87ea28 | 447 | |
8d1e977d LP |
448 | if (md->area_type & MMC_BLK_DATA_AREA_RPMB) |
449 | is_rpmb = true; | |
450 | ||
4d6144de JR |
451 | cmd.opcode = idata->ic.opcode; |
452 | cmd.arg = idata->ic.arg; | |
453 | cmd.flags = idata->ic.flags; | |
454 | ||
455 | if (idata->buf_bytes) { | |
456 | data.sg = &sg; | |
457 | data.sg_len = 1; | |
458 | data.blksz = idata->ic.blksz; | |
459 | data.blocks = idata->ic.blocks; | |
460 | ||
461 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
462 | ||
463 | if (idata->ic.write_flag) | |
464 | data.flags = MMC_DATA_WRITE; | |
465 | else | |
466 | data.flags = MMC_DATA_READ; | |
467 | ||
468 | /* data.flags must already be set before doing this. */ | |
469 | mmc_set_data_timeout(&data, card); | |
470 | ||
471 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
472 | if (idata->ic.data_timeout_ns) | |
473 | data.timeout_ns = idata->ic.data_timeout_ns; | |
474 | ||
475 | if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { | |
476 | /* | |
477 | * Pretend this is a data transfer and rely on the | |
478 | * host driver to compute timeout. When all host | |
479 | * drivers support cmd.cmd_timeout for R1B, this | |
480 | * can be changed to: | |
481 | * | |
482 | * mrq.data = NULL; | |
483 | * cmd.cmd_timeout = idata->ic.cmd_timeout_ms; | |
484 | */ | |
485 | data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000; | |
486 | } | |
487 | ||
488 | mrq.data = &data; | |
489 | } | |
490 | ||
491 | mrq.cmd = &cmd; | |
492 | ||
8d1e977d LP |
493 | err = mmc_blk_part_switch(card, md); |
494 | if (err) | |
a5f5774c | 495 | return err; |
8d1e977d | 496 | |
cb87ea28 JC |
497 | if (idata->ic.is_acmd) { |
498 | err = mmc_app_cmd(card->host, card); | |
499 | if (err) | |
a5f5774c | 500 | return err; |
cb87ea28 JC |
501 | } |
502 | ||
8d1e977d LP |
503 | if (is_rpmb) { |
504 | err = mmc_set_blockcount(card, data.blocks, | |
505 | idata->ic.write_flag & (1 << 31)); | |
506 | if (err) | |
a5f5774c | 507 | return err; |
8d1e977d LP |
508 | } |
509 | ||
a82e484e YG |
510 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) && |
511 | (cmd.opcode == MMC_SWITCH)) { | |
775a9362 ME |
512 | err = ioctl_do_sanitize(card); |
513 | ||
514 | if (err) | |
515 | pr_err("%s: ioctl_do_sanitize() failed. err = %d", | |
516 | __func__, err); | |
517 | ||
a5f5774c | 518 | return err; |
775a9362 ME |
519 | } |
520 | ||
cb87ea28 JC |
521 | mmc_wait_for_req(card->host, &mrq); |
522 | ||
523 | if (cmd.error) { | |
524 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
525 | __func__, cmd.error); | |
a5f5774c | 526 | return cmd.error; |
cb87ea28 JC |
527 | } |
528 | if (data.error) { | |
529 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
530 | __func__, data.error); | |
a5f5774c | 531 | return data.error; |
cb87ea28 JC |
532 | } |
533 | ||
534 | /* | |
535 | * According to the SD specs, some commands require a delay after | |
536 | * issuing the command. | |
537 | */ | |
538 | if (idata->ic.postsleep_min_us) | |
539 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
540 | ||
a5f5774c | 541 | memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp)); |
cb87ea28 | 542 | |
8d1e977d LP |
543 | if (is_rpmb) { |
544 | /* | |
545 | * Ensure RPMB command has completed by polling CMD13 | |
546 | * "Send Status". | |
547 | */ | |
548 | err = ioctl_rpmb_card_status_poll(card, &status, 5); | |
549 | if (err) | |
550 | dev_err(mmc_dev(card->host), | |
551 | "%s: Card Status=0x%08X, error %d\n", | |
552 | __func__, status, err); | |
553 | } | |
554 | ||
a5f5774c JH |
555 | return err; |
556 | } | |
557 | ||
558 | static int mmc_blk_ioctl_cmd(struct block_device *bdev, | |
559 | struct mmc_ioc_cmd __user *ic_ptr) | |
560 | { | |
561 | struct mmc_blk_ioc_data *idata; | |
3ecd8cf2 | 562 | struct mmc_blk_ioc_data *idatas[1]; |
a5f5774c | 563 | struct mmc_blk_data *md; |
614f0388 | 564 | struct mmc_queue *mq; |
a5f5774c | 565 | struct mmc_card *card; |
b093410c | 566 | int err = 0, ioc_err = 0; |
614f0388 | 567 | struct request *req; |
a5f5774c | 568 | |
83c742c3 SL |
569 | /* |
570 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
571 | * whole block device, not on a partition. This prevents overspray | |
572 | * between sibling partitions. | |
573 | */ | |
574 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
575 | return -EPERM; | |
576 | ||
a5f5774c JH |
577 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); |
578 | if (IS_ERR(idata)) | |
579 | return PTR_ERR(idata); | |
580 | ||
581 | md = mmc_blk_get(bdev->bd_disk); | |
582 | if (!md) { | |
583 | err = -EINVAL; | |
584 | goto cmd_err; | |
585 | } | |
586 | ||
587 | card = md->queue.card; | |
588 | if (IS_ERR(card)) { | |
589 | err = PTR_ERR(card); | |
590 | goto cmd_done; | |
591 | } | |
592 | ||
614f0388 LW |
593 | /* |
594 | * Dispatch the ioctl() into the block request queue. | |
595 | */ | |
596 | mq = &md->queue; | |
597 | req = blk_get_request(mq->queue, | |
598 | idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, | |
599 | __GFP_RECLAIM); | |
3ecd8cf2 | 600 | idatas[0] = idata; |
02166a01 | 601 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_IOCTL; |
3ecd8cf2 LW |
602 | req_to_mmc_queue_req(req)->idata = idatas; |
603 | req_to_mmc_queue_req(req)->ioc_count = 1; | |
614f0388 | 604 | blk_execute_rq(mq->queue, NULL, req, 0); |
0493f6fe | 605 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
b093410c | 606 | err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata); |
614f0388 | 607 | blk_put_request(req); |
a5f5774c | 608 | |
cb87ea28 JC |
609 | cmd_done: |
610 | mmc_blk_put(md); | |
1c02f000 | 611 | cmd_err: |
cb87ea28 JC |
612 | kfree(idata->buf); |
613 | kfree(idata); | |
b093410c | 614 | return ioc_err ? ioc_err : err; |
cb87ea28 JC |
615 | } |
616 | ||
a5f5774c JH |
617 | static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev, |
618 | struct mmc_ioc_multi_cmd __user *user) | |
619 | { | |
620 | struct mmc_blk_ioc_data **idata = NULL; | |
621 | struct mmc_ioc_cmd __user *cmds = user->cmds; | |
622 | struct mmc_card *card; | |
623 | struct mmc_blk_data *md; | |
3ecd8cf2 | 624 | struct mmc_queue *mq; |
b093410c | 625 | int i, err = 0, ioc_err = 0; |
a5f5774c | 626 | __u64 num_of_cmds; |
3ecd8cf2 | 627 | struct request *req; |
a5f5774c | 628 | |
83c742c3 SL |
629 | /* |
630 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
631 | * whole block device, not on a partition. This prevents overspray | |
632 | * between sibling partitions. | |
633 | */ | |
634 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
635 | return -EPERM; | |
636 | ||
a5f5774c JH |
637 | if (copy_from_user(&num_of_cmds, &user->num_of_cmds, |
638 | sizeof(num_of_cmds))) | |
639 | return -EFAULT; | |
640 | ||
641 | if (num_of_cmds > MMC_IOC_MAX_CMDS) | |
642 | return -EINVAL; | |
643 | ||
644 | idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL); | |
645 | if (!idata) | |
646 | return -ENOMEM; | |
647 | ||
648 | for (i = 0; i < num_of_cmds; i++) { | |
649 | idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]); | |
650 | if (IS_ERR(idata[i])) { | |
651 | err = PTR_ERR(idata[i]); | |
652 | num_of_cmds = i; | |
653 | goto cmd_err; | |
654 | } | |
655 | } | |
656 | ||
657 | md = mmc_blk_get(bdev->bd_disk); | |
f00ab14c OJ |
658 | if (!md) { |
659 | err = -EINVAL; | |
a5f5774c | 660 | goto cmd_err; |
f00ab14c | 661 | } |
a5f5774c JH |
662 | |
663 | card = md->queue.card; | |
664 | if (IS_ERR(card)) { | |
665 | err = PTR_ERR(card); | |
666 | goto cmd_done; | |
667 | } | |
668 | ||
3c866568 | 669 | |
3ecd8cf2 LW |
670 | /* |
671 | * Dispatch the ioctl()s into the block request queue. | |
672 | */ | |
673 | mq = &md->queue; | |
674 | req = blk_get_request(mq->queue, | |
675 | idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, | |
676 | __GFP_RECLAIM); | |
02166a01 | 677 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_IOCTL; |
3ecd8cf2 LW |
678 | req_to_mmc_queue_req(req)->idata = idata; |
679 | req_to_mmc_queue_req(req)->ioc_count = num_of_cmds; | |
680 | blk_execute_rq(mq->queue, NULL, req, 0); | |
0493f6fe | 681 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
a5f5774c JH |
682 | |
683 | /* copy to user if data and response */ | |
b093410c | 684 | for (i = 0; i < num_of_cmds && !err; i++) |
a5f5774c | 685 | err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]); |
a5f5774c | 686 | |
3ecd8cf2 LW |
687 | blk_put_request(req); |
688 | ||
a5f5774c JH |
689 | cmd_done: |
690 | mmc_blk_put(md); | |
691 | cmd_err: | |
692 | for (i = 0; i < num_of_cmds; i++) { | |
693 | kfree(idata[i]->buf); | |
694 | kfree(idata[i]); | |
695 | } | |
696 | kfree(idata); | |
b093410c | 697 | return ioc_err ? ioc_err : err; |
a5f5774c JH |
698 | } |
699 | ||
cb87ea28 JC |
700 | static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, |
701 | unsigned int cmd, unsigned long arg) | |
702 | { | |
a5f5774c JH |
703 | switch (cmd) { |
704 | case MMC_IOC_CMD: | |
705 | return mmc_blk_ioctl_cmd(bdev, | |
706 | (struct mmc_ioc_cmd __user *)arg); | |
707 | case MMC_IOC_MULTI_CMD: | |
708 | return mmc_blk_ioctl_multi_cmd(bdev, | |
709 | (struct mmc_ioc_multi_cmd __user *)arg); | |
710 | default: | |
711 | return -EINVAL; | |
712 | } | |
cb87ea28 JC |
713 | } |
714 | ||
715 | #ifdef CONFIG_COMPAT | |
716 | static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
717 | unsigned int cmd, unsigned long arg) | |
718 | { | |
719 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
720 | } | |
721 | #endif | |
722 | ||
83d5cde4 | 723 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
724 | .open = mmc_blk_open, |
725 | .release = mmc_blk_release, | |
a885c8c4 | 726 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 727 | .owner = THIS_MODULE, |
cb87ea28 JC |
728 | .ioctl = mmc_blk_ioctl, |
729 | #ifdef CONFIG_COMPAT | |
730 | .compat_ioctl = mmc_blk_compat_ioctl, | |
731 | #endif | |
1da177e4 LT |
732 | }; |
733 | ||
025e3d5f AH |
734 | static int mmc_blk_part_switch_pre(struct mmc_card *card, |
735 | unsigned int part_type) | |
736 | { | |
737 | int ret = 0; | |
738 | ||
739 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
740 | if (card->ext_csd.cmdq_en) { | |
741 | ret = mmc_cmdq_disable(card); | |
742 | if (ret) | |
743 | return ret; | |
744 | } | |
745 | mmc_retune_pause(card->host); | |
746 | } | |
747 | ||
748 | return ret; | |
749 | } | |
750 | ||
751 | static int mmc_blk_part_switch_post(struct mmc_card *card, | |
752 | unsigned int part_type) | |
753 | { | |
754 | int ret = 0; | |
755 | ||
756 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
757 | mmc_retune_unpause(card->host); | |
758 | if (card->reenable_cmdq && !card->ext_csd.cmdq_en) | |
759 | ret = mmc_cmdq_enable(card); | |
760 | } | |
761 | ||
762 | return ret; | |
763 | } | |
764 | ||
371a689f AW |
765 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
766 | struct mmc_blk_data *md) | |
767 | { | |
025e3d5f | 768 | int ret = 0; |
fc95e30b | 769 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); |
0d7d85ca | 770 | |
371a689f AW |
771 | if (main_md->part_curr == md->part_type) |
772 | return 0; | |
773 | ||
774 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
775 | u8 part_config = card->ext_csd.part_config; |
776 | ||
025e3d5f AH |
777 | ret = mmc_blk_part_switch_pre(card, md->part_type); |
778 | if (ret) | |
779 | return ret; | |
57da0c04 | 780 | |
0d7d85ca AH |
781 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
782 | part_config |= md->part_type; | |
371a689f AW |
783 | |
784 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 785 | EXT_CSD_PART_CONFIG, part_config, |
371a689f | 786 | card->ext_csd.part_time); |
57da0c04 | 787 | if (ret) { |
025e3d5f | 788 | mmc_blk_part_switch_post(card, md->part_type); |
371a689f | 789 | return ret; |
57da0c04 | 790 | } |
0d7d85ca AH |
791 | |
792 | card->ext_csd.part_config = part_config; | |
57da0c04 | 793 | |
025e3d5f | 794 | ret = mmc_blk_part_switch_post(card, main_md->part_curr); |
67716327 | 795 | } |
371a689f AW |
796 | |
797 | main_md->part_curr = md->part_type; | |
025e3d5f | 798 | return ret; |
371a689f AW |
799 | } |
800 | ||
169f03a0 | 801 | static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) |
ec5a19dd PO |
802 | { |
803 | int err; | |
051913da BD |
804 | u32 result; |
805 | __be32 *blocks; | |
ec5a19dd | 806 | |
c7836d15 MY |
807 | struct mmc_request mrq = {}; |
808 | struct mmc_command cmd = {}; | |
809 | struct mmc_data data = {}; | |
ec5a19dd PO |
810 | |
811 | struct scatterlist sg; | |
812 | ||
ec5a19dd PO |
813 | cmd.opcode = MMC_APP_CMD; |
814 | cmd.arg = card->rca << 16; | |
7213d175 | 815 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
816 | |
817 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 | 818 | if (err) |
169f03a0 | 819 | return err; |
7213d175 | 820 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) |
169f03a0 | 821 | return -EIO; |
ec5a19dd PO |
822 | |
823 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
824 | ||
825 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
826 | cmd.arg = 0; | |
7213d175 | 827 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 828 | |
ec5a19dd PO |
829 | data.blksz = 4; |
830 | data.blocks = 1; | |
831 | data.flags = MMC_DATA_READ; | |
832 | data.sg = &sg; | |
833 | data.sg_len = 1; | |
d380443c | 834 | mmc_set_data_timeout(&data, card); |
ec5a19dd | 835 | |
ec5a19dd PO |
836 | mrq.cmd = &cmd; |
837 | mrq.data = &data; | |
838 | ||
051913da BD |
839 | blocks = kmalloc(4, GFP_KERNEL); |
840 | if (!blocks) | |
169f03a0 | 841 | return -ENOMEM; |
051913da BD |
842 | |
843 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
844 | |
845 | mmc_wait_for_req(card->host, &mrq); | |
846 | ||
051913da BD |
847 | result = ntohl(*blocks); |
848 | kfree(blocks); | |
849 | ||
17b0429d | 850 | if (cmd.error || data.error) |
169f03a0 LW |
851 | return -EIO; |
852 | ||
853 | *written_blocks = result; | |
ec5a19dd | 854 | |
169f03a0 | 855 | return 0; |
ec5a19dd PO |
856 | } |
857 | ||
0a2d4048 | 858 | static int get_card_status(struct mmc_card *card, u32 *status, int retries) |
504f191f | 859 | { |
c7836d15 | 860 | struct mmc_command cmd = {}; |
504f191f AH |
861 | int err; |
862 | ||
504f191f AH |
863 | cmd.opcode = MMC_SEND_STATUS; |
864 | if (!mmc_host_is_spi(card->host)) | |
865 | cmd.arg = card->rca << 16; | |
866 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; | |
0a2d4048 RKAL |
867 | err = mmc_wait_for_cmd(card->host, &cmd, retries); |
868 | if (err == 0) | |
869 | *status = cmd.resp[0]; | |
870 | return err; | |
504f191f AH |
871 | } |
872 | ||
c49433fb | 873 | static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, |
c44d6cef | 874 | bool hw_busy_detect, struct request *req, bool *gen_err) |
c49433fb UH |
875 | { |
876 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); | |
877 | int err = 0; | |
878 | u32 status; | |
879 | ||
880 | do { | |
881 | err = get_card_status(card, &status, 5); | |
882 | if (err) { | |
883 | pr_err("%s: error %d requesting status\n", | |
884 | req->rq_disk->disk_name, err); | |
885 | return err; | |
886 | } | |
887 | ||
888 | if (status & R1_ERROR) { | |
889 | pr_err("%s: %s: error sending status cmd, status %#x\n", | |
890 | req->rq_disk->disk_name, __func__, status); | |
c44d6cef | 891 | *gen_err = true; |
c49433fb UH |
892 | } |
893 | ||
95a91298 UH |
894 | /* We may rely on the host hw to handle busy detection.*/ |
895 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && | |
896 | hw_busy_detect) | |
897 | break; | |
898 | ||
c49433fb UH |
899 | /* |
900 | * Timeout if the device never becomes ready for data and never | |
901 | * leaves the program state. | |
902 | */ | |
903 | if (time_after(jiffies, timeout)) { | |
904 | pr_err("%s: Card stuck in programming state! %s %s\n", | |
905 | mmc_hostname(card->host), | |
906 | req->rq_disk->disk_name, __func__); | |
907 | return -ETIMEDOUT; | |
908 | } | |
909 | ||
910 | /* | |
911 | * Some cards mishandle the status bits, | |
912 | * so make sure to check both the busy | |
913 | * indication and the card state. | |
914 | */ | |
915 | } while (!(status & R1_READY_FOR_DATA) || | |
916 | (R1_CURRENT_STATE(status) == R1_STATE_PRG)); | |
917 | ||
918 | return err; | |
919 | } | |
920 | ||
bb5cba40 | 921 | static int send_stop(struct mmc_card *card, unsigned int timeout_ms, |
c44d6cef | 922 | struct request *req, bool *gen_err, u32 *stop_status) |
bb5cba40 UH |
923 | { |
924 | struct mmc_host *host = card->host; | |
c7836d15 | 925 | struct mmc_command cmd = {}; |
bb5cba40 UH |
926 | int err; |
927 | bool use_r1b_resp = rq_data_dir(req) == WRITE; | |
928 | ||
929 | /* | |
930 | * Normally we use R1B responses for WRITE, but in cases where the host | |
931 | * has specified a max_busy_timeout we need to validate it. A failure | |
932 | * means we need to prevent the host from doing hw busy detection, which | |
933 | * is done by converting to a R1 response instead. | |
934 | */ | |
935 | if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) | |
936 | use_r1b_resp = false; | |
937 | ||
938 | cmd.opcode = MMC_STOP_TRANSMISSION; | |
939 | if (use_r1b_resp) { | |
940 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
941 | cmd.busy_timeout = timeout_ms; | |
942 | } else { | |
943 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
944 | } | |
945 | ||
946 | err = mmc_wait_for_cmd(host, &cmd, 5); | |
947 | if (err) | |
948 | return err; | |
949 | ||
950 | *stop_status = cmd.resp[0]; | |
951 | ||
952 | /* No need to check card status in case of READ. */ | |
953 | if (rq_data_dir(req) == READ) | |
954 | return 0; | |
955 | ||
956 | if (!mmc_host_is_spi(host) && | |
957 | (*stop_status & R1_ERROR)) { | |
958 | pr_err("%s: %s: general error sending stop command, resp %#x\n", | |
959 | req->rq_disk->disk_name, __func__, *stop_status); | |
c44d6cef | 960 | *gen_err = true; |
bb5cba40 UH |
961 | } |
962 | ||
963 | return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err); | |
964 | } | |
965 | ||
a8ad82cc | 966 | #define ERR_NOMEDIUM 3 |
a01f3ccf RKAL |
967 | #define ERR_RETRY 2 |
968 | #define ERR_ABORT 1 | |
969 | #define ERR_CONTINUE 0 | |
970 | ||
971 | static int mmc_blk_cmd_error(struct request *req, const char *name, int error, | |
972 | bool status_valid, u32 status) | |
973 | { | |
974 | switch (error) { | |
975 | case -EILSEQ: | |
976 | /* response crc error, retry the r/w cmd */ | |
977 | pr_err("%s: %s sending %s command, card status %#x\n", | |
978 | req->rq_disk->disk_name, "response CRC error", | |
979 | name, status); | |
980 | return ERR_RETRY; | |
981 | ||
982 | case -ETIMEDOUT: | |
983 | pr_err("%s: %s sending %s command, card status %#x\n", | |
984 | req->rq_disk->disk_name, "timed out", name, status); | |
985 | ||
986 | /* If the status cmd initially failed, retry the r/w cmd */ | |
cc4d04be KS |
987 | if (!status_valid) { |
988 | pr_err("%s: status not valid, retrying timeout\n", | |
989 | req->rq_disk->disk_name); | |
a01f3ccf | 990 | return ERR_RETRY; |
cc4d04be | 991 | } |
a01f3ccf RKAL |
992 | |
993 | /* | |
994 | * If it was a r/w cmd crc error, or illegal command | |
995 | * (eg, issued in wrong state) then retry - we should | |
996 | * have corrected the state problem above. | |
997 | */ | |
cc4d04be KS |
998 | if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) { |
999 | pr_err("%s: command error, retrying timeout\n", | |
1000 | req->rq_disk->disk_name); | |
a01f3ccf | 1001 | return ERR_RETRY; |
cc4d04be | 1002 | } |
a01f3ccf RKAL |
1003 | |
1004 | /* Otherwise abort the command */ | |
1005 | return ERR_ABORT; | |
1006 | ||
1007 | default: | |
1008 | /* We don't understand the error code the driver gave us */ | |
1009 | pr_err("%s: unknown error %d sending read/write command, card status %#x\n", | |
1010 | req->rq_disk->disk_name, error, status); | |
1011 | return ERR_ABORT; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * Initial r/w and stop cmd error recovery. | |
1017 | * We don't know whether the card received the r/w cmd or not, so try to | |
1018 | * restore things back to a sane state. Essentially, we do this as follows: | |
1019 | * - Obtain card status. If the first attempt to obtain card status fails, | |
1020 | * the status word will reflect the failed status cmd, not the failed | |
1021 | * r/w cmd. If we fail to obtain card status, it suggests we can no | |
1022 | * longer communicate with the card. | |
1023 | * - Check the card state. If the card received the cmd but there was a | |
1024 | * transient problem with the response, it might still be in a data transfer | |
1025 | * mode. Try to send it a stop command. If this fails, we can't recover. | |
1026 | * - If the r/w cmd failed due to a response CRC error, it was probably | |
1027 | * transient, so retry the cmd. | |
1028 | * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry. | |
1029 | * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or | |
1030 | * illegal cmd, retry. | |
1031 | * Otherwise we don't understand what happened, so abort. | |
1032 | */ | |
1033 | static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, | |
2cc64587 | 1034 | struct mmc_blk_request *brq, bool *ecc_err, bool *gen_err) |
a01f3ccf RKAL |
1035 | { |
1036 | bool prev_cmd_status_valid = true; | |
1037 | u32 status, stop_status = 0; | |
1038 | int err, retry; | |
1039 | ||
a8ad82cc SRT |
1040 | if (mmc_card_removed(card)) |
1041 | return ERR_NOMEDIUM; | |
1042 | ||
a01f3ccf RKAL |
1043 | /* |
1044 | * Try to get card status which indicates both the card state | |
1045 | * and why there was no response. If the first attempt fails, | |
1046 | * we can't be sure the returned status is for the r/w command. | |
1047 | */ | |
1048 | for (retry = 2; retry >= 0; retry--) { | |
1049 | err = get_card_status(card, &status, 0); | |
1050 | if (!err) | |
1051 | break; | |
1052 | ||
6f398ad2 AH |
1053 | /* Re-tune if needed */ |
1054 | mmc_retune_recheck(card->host); | |
1055 | ||
a01f3ccf RKAL |
1056 | prev_cmd_status_valid = false; |
1057 | pr_err("%s: error %d sending status command, %sing\n", | |
1058 | req->rq_disk->disk_name, err, retry ? "retry" : "abort"); | |
1059 | } | |
1060 | ||
1061 | /* We couldn't get a response from the card. Give up. */ | |
a8ad82cc SRT |
1062 | if (err) { |
1063 | /* Check if the card is removed */ | |
1064 | if (mmc_detect_card_removed(card->host)) | |
1065 | return ERR_NOMEDIUM; | |
a01f3ccf | 1066 | return ERR_ABORT; |
a8ad82cc | 1067 | } |
a01f3ccf | 1068 | |
67716327 AH |
1069 | /* Flag ECC errors */ |
1070 | if ((status & R1_CARD_ECC_FAILED) || | |
1071 | (brq->stop.resp[0] & R1_CARD_ECC_FAILED) || | |
1072 | (brq->cmd.resp[0] & R1_CARD_ECC_FAILED)) | |
2cc64587 | 1073 | *ecc_err = true; |
67716327 | 1074 | |
c8760069 KY |
1075 | /* Flag General errors */ |
1076 | if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) | |
1077 | if ((status & R1_ERROR) || | |
1078 | (brq->stop.resp[0] & R1_ERROR)) { | |
1079 | pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n", | |
1080 | req->rq_disk->disk_name, __func__, | |
1081 | brq->stop.resp[0], status); | |
c44d6cef | 1082 | *gen_err = true; |
c8760069 KY |
1083 | } |
1084 | ||
a01f3ccf RKAL |
1085 | /* |
1086 | * Check the current card state. If it is in some data transfer | |
1087 | * mode, tell it to stop (and hopefully transition back to TRAN.) | |
1088 | */ | |
1089 | if (R1_CURRENT_STATE(status) == R1_STATE_DATA || | |
1090 | R1_CURRENT_STATE(status) == R1_STATE_RCV) { | |
bb5cba40 UH |
1091 | err = send_stop(card, |
1092 | DIV_ROUND_UP(brq->data.timeout_ns, 1000000), | |
1093 | req, gen_err, &stop_status); | |
1094 | if (err) { | |
a01f3ccf RKAL |
1095 | pr_err("%s: error %d sending stop command\n", |
1096 | req->rq_disk->disk_name, err); | |
bb5cba40 UH |
1097 | /* |
1098 | * If the stop cmd also timed out, the card is probably | |
1099 | * not present, so abort. Other errors are bad news too. | |
1100 | */ | |
a01f3ccf | 1101 | return ERR_ABORT; |
bb5cba40 UH |
1102 | } |
1103 | ||
67716327 | 1104 | if (stop_status & R1_CARD_ECC_FAILED) |
2cc64587 | 1105 | *ecc_err = true; |
a01f3ccf RKAL |
1106 | } |
1107 | ||
1108 | /* Check for set block count errors */ | |
1109 | if (brq->sbc.error) | |
1110 | return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error, | |
1111 | prev_cmd_status_valid, status); | |
1112 | ||
1113 | /* Check for r/w command errors */ | |
1114 | if (brq->cmd.error) | |
1115 | return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error, | |
1116 | prev_cmd_status_valid, status); | |
1117 | ||
67716327 AH |
1118 | /* Data errors */ |
1119 | if (!brq->stop.error) | |
1120 | return ERR_CONTINUE; | |
1121 | ||
a01f3ccf | 1122 | /* Now for stop errors. These aren't fatal to the transfer. */ |
5e1344eb | 1123 | pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n", |
a01f3ccf RKAL |
1124 | req->rq_disk->disk_name, brq->stop.error, |
1125 | brq->cmd.resp[0], status); | |
1126 | ||
1127 | /* | |
1128 | * Subsitute in our own stop status as this will give the error | |
1129 | * state which happened during the execution of the r/w command. | |
1130 | */ | |
1131 | if (stop_status) { | |
1132 | brq->stop.resp[0] = stop_status; | |
1133 | brq->stop.error = 0; | |
1134 | } | |
1135 | return ERR_CONTINUE; | |
1136 | } | |
1137 | ||
67716327 AH |
1138 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
1139 | int type) | |
1140 | { | |
1141 | int err; | |
1142 | ||
1143 | if (md->reset_done & type) | |
1144 | return -EEXIST; | |
1145 | ||
1146 | md->reset_done |= type; | |
1147 | err = mmc_hw_reset(host); | |
1148 | /* Ensure we switch back to the correct partition */ | |
1149 | if (err != -EOPNOTSUPP) { | |
fc95e30b UH |
1150 | struct mmc_blk_data *main_md = |
1151 | dev_get_drvdata(&host->card->dev); | |
67716327 AH |
1152 | int part_err; |
1153 | ||
1154 | main_md->part_curr = main_md->part_type; | |
1155 | part_err = mmc_blk_part_switch(host->card, md); | |
1156 | if (part_err) { | |
1157 | /* | |
1158 | * We have failed to get back into the correct | |
1159 | * partition, so we need to abort the whole request. | |
1160 | */ | |
1161 | return -ENODEV; | |
1162 | } | |
1163 | } | |
1164 | return err; | |
1165 | } | |
1166 | ||
1167 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
1168 | { | |
1169 | md->reset_done &= ~type; | |
1170 | } | |
1171 | ||
4e93b9a6 CD |
1172 | int mmc_access_rpmb(struct mmc_queue *mq) |
1173 | { | |
7db3028e | 1174 | struct mmc_blk_data *md = mq->blkdata; |
4e93b9a6 CD |
1175 | /* |
1176 | * If this is a RPMB partition access, return ture | |
1177 | */ | |
1178 | if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) | |
1179 | return true; | |
1180 | ||
1181 | return false; | |
1182 | } | |
1183 | ||
5ec12396 LW |
1184 | /* |
1185 | * The non-block commands come back from the block layer after it queued it and | |
1186 | * processed it with all other requests and then they get issued in this | |
1187 | * function. | |
1188 | */ | |
1189 | static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) | |
1190 | { | |
1191 | struct mmc_queue_req *mq_rq; | |
1192 | struct mmc_card *card = mq->card; | |
1193 | struct mmc_blk_data *md = mq->blkdata; | |
0493f6fe | 1194 | int ret; |
5ec12396 LW |
1195 | int i; |
1196 | ||
1197 | mq_rq = req_to_mmc_queue_req(req); | |
1198 | ||
1199 | switch (mq_rq->drv_op) { | |
1200 | case MMC_DRV_OP_IOCTL: | |
1201 | for (i = 0; i < mq_rq->ioc_count; i++) { | |
0493f6fe LW |
1202 | ret = __mmc_blk_ioctl_cmd(card, md, mq_rq->idata[i]); |
1203 | if (ret) | |
5ec12396 LW |
1204 | break; |
1205 | } | |
5ec12396 LW |
1206 | /* Always switch back to main area after RPMB access */ |
1207 | if (md->area_type & MMC_BLK_DATA_AREA_RPMB) | |
1208 | mmc_blk_part_switch(card, dev_get_drvdata(&card->dev)); | |
0493f6fe LW |
1209 | break; |
1210 | case MMC_DRV_OP_BOOT_WP: | |
1211 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, | |
1212 | card->ext_csd.boot_ro_lock | | |
1213 | EXT_CSD_BOOT_WP_B_PWR_WP_EN, | |
1214 | card->ext_csd.part_time); | |
1215 | if (ret) | |
1216 | pr_err("%s: Locking boot partition ro until next power on failed: %d\n", | |
1217 | md->disk->disk_name, ret); | |
1218 | else | |
1219 | card->ext_csd.boot_ro_lock |= | |
1220 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; | |
5ec12396 LW |
1221 | break; |
1222 | default: | |
0493f6fe LW |
1223 | pr_err("%s: unknown driver specific operation\n", |
1224 | md->disk->disk_name); | |
1225 | ret = -EINVAL; | |
5ec12396 LW |
1226 | break; |
1227 | } | |
0493f6fe LW |
1228 | mq_rq->drv_op_result = ret; |
1229 | blk_end_request_all(req, ret); | |
5ec12396 LW |
1230 | } |
1231 | ||
df061588 | 1232 | static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
bd788c96 | 1233 | { |
7db3028e | 1234 | struct mmc_blk_data *md = mq->blkdata; |
bd788c96 AH |
1235 | struct mmc_card *card = md->queue.card; |
1236 | unsigned int from, nr, arg; | |
67716327 | 1237 | int err = 0, type = MMC_BLK_DISCARD; |
bd788c96 | 1238 | |
bd788c96 AH |
1239 | if (!mmc_can_erase(card)) { |
1240 | err = -EOPNOTSUPP; | |
8cb6ed17 | 1241 | goto fail; |
bd788c96 AH |
1242 | } |
1243 | ||
1244 | from = blk_rq_pos(req); | |
1245 | nr = blk_rq_sectors(req); | |
1246 | ||
b3bf9153 KP |
1247 | if (mmc_can_discard(card)) |
1248 | arg = MMC_DISCARD_ARG; | |
1249 | else if (mmc_can_trim(card)) | |
bd788c96 AH |
1250 | arg = MMC_TRIM_ARG; |
1251 | else | |
1252 | arg = MMC_ERASE_ARG; | |
164b50b3 GU |
1253 | do { |
1254 | err = 0; | |
1255 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
1256 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1257 | INAND_CMD38_ARG_EXT_CSD, | |
1258 | arg == MMC_TRIM_ARG ? | |
1259 | INAND_CMD38_ARG_TRIM : | |
1260 | INAND_CMD38_ARG_ERASE, | |
1261 | 0); | |
1262 | } | |
1263 | if (!err) | |
1264 | err = mmc_erase(card, from, nr, arg); | |
1265 | } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); | |
67716327 AH |
1266 | if (!err) |
1267 | mmc_blk_reset_success(md, type); | |
8cb6ed17 | 1268 | fail: |
ecf8b5d0 | 1269 | blk_end_request(req, err, blk_rq_bytes(req)); |
bd788c96 AH |
1270 | } |
1271 | ||
df061588 | 1272 | static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
49804548 AH |
1273 | struct request *req) |
1274 | { | |
7db3028e | 1275 | struct mmc_blk_data *md = mq->blkdata; |
49804548 | 1276 | struct mmc_card *card = md->queue.card; |
775a9362 | 1277 | unsigned int from, nr, arg; |
67716327 | 1278 | int err = 0, type = MMC_BLK_SECDISCARD; |
49804548 | 1279 | |
775a9362 | 1280 | if (!(mmc_can_secure_erase_trim(card))) { |
49804548 AH |
1281 | err = -EOPNOTSUPP; |
1282 | goto out; | |
1283 | } | |
1284 | ||
28302812 AH |
1285 | from = blk_rq_pos(req); |
1286 | nr = blk_rq_sectors(req); | |
1287 | ||
775a9362 ME |
1288 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) |
1289 | arg = MMC_SECURE_TRIM1_ARG; | |
1290 | else | |
1291 | arg = MMC_SECURE_ERASE_ARG; | |
d9ddd629 | 1292 | |
67716327 | 1293 | retry: |
6a7a6b45 AW |
1294 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1295 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1296 | INAND_CMD38_ARG_EXT_CSD, | |
1297 | arg == MMC_SECURE_TRIM1_ARG ? | |
1298 | INAND_CMD38_ARG_SECTRIM1 : | |
1299 | INAND_CMD38_ARG_SECERASE, | |
1300 | 0); | |
1301 | if (err) | |
28302812 | 1302 | goto out_retry; |
6a7a6b45 | 1303 | } |
28302812 | 1304 | |
49804548 | 1305 | err = mmc_erase(card, from, nr, arg); |
28302812 AH |
1306 | if (err == -EIO) |
1307 | goto out_retry; | |
1308 | if (err) | |
1309 | goto out; | |
1310 | ||
1311 | if (arg == MMC_SECURE_TRIM1_ARG) { | |
6a7a6b45 AW |
1312 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1313 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1314 | INAND_CMD38_ARG_EXT_CSD, | |
1315 | INAND_CMD38_ARG_SECTRIM2, | |
1316 | 0); | |
1317 | if (err) | |
28302812 | 1318 | goto out_retry; |
6a7a6b45 | 1319 | } |
28302812 | 1320 | |
49804548 | 1321 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
28302812 AH |
1322 | if (err == -EIO) |
1323 | goto out_retry; | |
1324 | if (err) | |
1325 | goto out; | |
6a7a6b45 | 1326 | } |
28302812 | 1327 | |
28302812 AH |
1328 | out_retry: |
1329 | if (err && !mmc_blk_reset(md, card->host, type)) | |
67716327 AH |
1330 | goto retry; |
1331 | if (!err) | |
1332 | mmc_blk_reset_success(md, type); | |
28302812 | 1333 | out: |
ecf8b5d0 | 1334 | blk_end_request(req, err, blk_rq_bytes(req)); |
49804548 AH |
1335 | } |
1336 | ||
df061588 | 1337 | static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
f4c5522b | 1338 | { |
7db3028e | 1339 | struct mmc_blk_data *md = mq->blkdata; |
881d1c25 SJ |
1340 | struct mmc_card *card = md->queue.card; |
1341 | int ret = 0; | |
1342 | ||
1343 | ret = mmc_flush_cache(card); | |
1344 | if (ret) | |
1345 | ret = -EIO; | |
f4c5522b | 1346 | |
ecf8b5d0 | 1347 | blk_end_request_all(req, ret); |
f4c5522b AW |
1348 | } |
1349 | ||
1350 | /* | |
1351 | * Reformat current write as a reliable write, supporting | |
1352 | * both legacy and the enhanced reliable write MMC cards. | |
1353 | * In each transfer we'll handle only as much as a single | |
1354 | * reliable write can handle, thus finish the request in | |
1355 | * partial completions. | |
1356 | */ | |
d0c97cfb AW |
1357 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
1358 | struct mmc_card *card, | |
1359 | struct request *req) | |
f4c5522b | 1360 | { |
f4c5522b AW |
1361 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
1362 | /* Legacy mode imposes restrictions on transfers. */ | |
9cb38f7a | 1363 | if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors)) |
f4c5522b AW |
1364 | brq->data.blocks = 1; |
1365 | ||
1366 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
1367 | brq->data.blocks = card->ext_csd.rel_sectors; | |
1368 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
1369 | brq->data.blocks = 1; | |
1370 | } | |
f4c5522b AW |
1371 | } |
1372 | ||
4c2b8f26 RKAL |
1373 | #define CMD_ERRORS \ |
1374 | (R1_OUT_OF_RANGE | /* Command argument out of range */ \ | |
1375 | R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
1376 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ | |
1377 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
1378 | R1_CC_ERROR | /* Card controller error */ \ | |
1379 | R1_ERROR) /* General/unknown error */ | |
1380 | ||
8e8b3f51 LW |
1381 | static enum mmc_blk_status mmc_blk_err_check(struct mmc_card *card, |
1382 | struct mmc_async_req *areq) | |
d78d4a8a | 1383 | { |
ee8a43a5 | 1384 | struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req, |
74f5ba35 | 1385 | areq); |
ee8a43a5 | 1386 | struct mmc_blk_request *brq = &mq_mrq->brq; |
67e69d52 | 1387 | struct request *req = mmc_queue_req_to_req(mq_mrq); |
b8360a49 | 1388 | int need_retune = card->host->need_retune; |
2cc64587 | 1389 | bool ecc_err = false; |
c44d6cef | 1390 | bool gen_err = false; |
d78d4a8a PF |
1391 | |
1392 | /* | |
1393 | * sbc.error indicates a problem with the set block count | |
1394 | * command. No data will have been transferred. | |
1395 | * | |
1396 | * cmd.error indicates a problem with the r/w command. No | |
1397 | * data will have been transferred. | |
1398 | * | |
1399 | * stop.error indicates a problem with the stop command. Data | |
1400 | * may have been transferred, or may still be transferring. | |
1401 | */ | |
67716327 AH |
1402 | if (brq->sbc.error || brq->cmd.error || brq->stop.error || |
1403 | brq->data.error) { | |
c8760069 | 1404 | switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) { |
d78d4a8a PF |
1405 | case ERR_RETRY: |
1406 | return MMC_BLK_RETRY; | |
1407 | case ERR_ABORT: | |
1408 | return MMC_BLK_ABORT; | |
a8ad82cc SRT |
1409 | case ERR_NOMEDIUM: |
1410 | return MMC_BLK_NOMEDIUM; | |
d78d4a8a PF |
1411 | case ERR_CONTINUE: |
1412 | break; | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Check for errors relating to the execution of the | |
1418 | * initial command - such as address errors. No data | |
1419 | * has been transferred. | |
1420 | */ | |
1421 | if (brq->cmd.resp[0] & CMD_ERRORS) { | |
1422 | pr_err("%s: r/w command failed, status = %#x\n", | |
1423 | req->rq_disk->disk_name, brq->cmd.resp[0]); | |
1424 | return MMC_BLK_ABORT; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Everything else is either success, or a data error of some | |
1429 | * kind. If it was a write, we may have transitioned to | |
1430 | * program mode, which we have to wait for it to complete. | |
1431 | */ | |
1432 | if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { | |
c49433fb | 1433 | int err; |
8fee476b | 1434 | |
c8760069 KY |
1435 | /* Check stop command response */ |
1436 | if (brq->stop.resp[0] & R1_ERROR) { | |
1437 | pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n", | |
1438 | req->rq_disk->disk_name, __func__, | |
1439 | brq->stop.resp[0]); | |
c44d6cef | 1440 | gen_err = true; |
c8760069 KY |
1441 | } |
1442 | ||
95a91298 UH |
1443 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req, |
1444 | &gen_err); | |
c49433fb UH |
1445 | if (err) |
1446 | return MMC_BLK_CMD_ERR; | |
d78d4a8a PF |
1447 | } |
1448 | ||
c8760069 KY |
1449 | /* if general error occurs, retry the write operation. */ |
1450 | if (gen_err) { | |
1451 | pr_warn("%s: retrying write for general error\n", | |
1452 | req->rq_disk->disk_name); | |
1453 | return MMC_BLK_RETRY; | |
1454 | } | |
1455 | ||
d78d4a8a | 1456 | if (brq->data.error) { |
b8360a49 | 1457 | if (need_retune && !brq->retune_retry_done) { |
09faf61d RK |
1458 | pr_debug("%s: retrying because a re-tune was needed\n", |
1459 | req->rq_disk->disk_name); | |
b8360a49 AH |
1460 | brq->retune_retry_done = 1; |
1461 | return MMC_BLK_RETRY; | |
1462 | } | |
d78d4a8a PF |
1463 | pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n", |
1464 | req->rq_disk->disk_name, brq->data.error, | |
1465 | (unsigned)blk_rq_pos(req), | |
1466 | (unsigned)blk_rq_sectors(req), | |
1467 | brq->cmd.resp[0], brq->stop.resp[0]); | |
1468 | ||
1469 | if (rq_data_dir(req) == READ) { | |
67716327 AH |
1470 | if (ecc_err) |
1471 | return MMC_BLK_ECC_ERR; | |
d78d4a8a PF |
1472 | return MMC_BLK_DATA_ERR; |
1473 | } else { | |
1474 | return MMC_BLK_CMD_ERR; | |
1475 | } | |
1476 | } | |
1477 | ||
67716327 AH |
1478 | if (!brq->data.bytes_xfered) |
1479 | return MMC_BLK_RETRY; | |
d78d4a8a | 1480 | |
67716327 AH |
1481 | if (blk_rq_bytes(req) != brq->data.bytes_xfered) |
1482 | return MMC_BLK_PARTIAL; | |
1483 | ||
1484 | return MMC_BLK_SUCCESS; | |
d78d4a8a PF |
1485 | } |
1486 | ||
ca5717f7 AH |
1487 | static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, |
1488 | int disable_multi, bool *do_rel_wr, | |
1489 | bool *do_data_tag) | |
1da177e4 | 1490 | { |
ca5717f7 AH |
1491 | struct mmc_blk_data *md = mq->blkdata; |
1492 | struct mmc_card *card = md->queue.card; | |
54d49d77 | 1493 | struct mmc_blk_request *brq = &mqrq->brq; |
67e69d52 | 1494 | struct request *req = mmc_queue_req_to_req(mqrq); |
1da177e4 | 1495 | |
f4c5522b AW |
1496 | /* |
1497 | * Reliable writes are used to implement Forced Unit Access and | |
d3df0465 | 1498 | * are supported only on MMCs. |
f4c5522b | 1499 | */ |
ca5717f7 AH |
1500 | *do_rel_wr = (req->cmd_flags & REQ_FUA) && |
1501 | rq_data_dir(req) == WRITE && | |
1502 | (md->flags & MMC_BLK_REL_WR); | |
f4c5522b | 1503 | |
54d49d77 | 1504 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
ca5717f7 | 1505 | |
54d49d77 | 1506 | brq->mrq.data = &brq->data; |
1da177e4 | 1507 | |
54d49d77 PF |
1508 | brq->stop.opcode = MMC_STOP_TRANSMISSION; |
1509 | brq->stop.arg = 0; | |
ca5717f7 AH |
1510 | |
1511 | if (rq_data_dir(req) == READ) { | |
1512 | brq->data.flags = MMC_DATA_READ; | |
1513 | brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1514 | } else { | |
1515 | brq->data.flags = MMC_DATA_WRITE; | |
1516 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1517 | } | |
1518 | ||
1519 | brq->data.blksz = 512; | |
54d49d77 | 1520 | brq->data.blocks = blk_rq_sectors(req); |
6a79e391 | 1521 | |
54d49d77 PF |
1522 | /* |
1523 | * The block layer doesn't support all sector count | |
1524 | * restrictions, so we need to be prepared for too big | |
1525 | * requests. | |
1526 | */ | |
1527 | if (brq->data.blocks > card->host->max_blk_count) | |
1528 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1529 | |
2bf22b39 PW |
1530 | if (brq->data.blocks > 1) { |
1531 | /* | |
1532 | * After a read error, we redo the request one sector | |
1533 | * at a time in order to accurately determine which | |
1534 | * sectors can be read successfully. | |
1535 | */ | |
1536 | if (disable_multi) | |
1537 | brq->data.blocks = 1; | |
1538 | ||
2e47e842 KM |
1539 | /* |
1540 | * Some controllers have HW issues while operating | |
1541 | * in multiple I/O mode | |
1542 | */ | |
1543 | if (card->host->ops->multi_io_quirk) | |
1544 | brq->data.blocks = card->host->ops->multi_io_quirk(card, | |
1545 | (rq_data_dir(req) == READ) ? | |
1546 | MMC_DATA_READ : MMC_DATA_WRITE, | |
1547 | brq->data.blocks); | |
2bf22b39 | 1548 | } |
d0c97cfb | 1549 | |
ca5717f7 AH |
1550 | if (*do_rel_wr) |
1551 | mmc_apply_rel_rw(brq, card, req); | |
1552 | ||
1553 | /* | |
1554 | * Data tag is used only during writing meta data to speed | |
1555 | * up write and any subsequent read of this meta data | |
1556 | */ | |
1557 | *do_data_tag = card->ext_csd.data_tag_unit_size && | |
1558 | (req->cmd_flags & REQ_META) && | |
1559 | (rq_data_dir(req) == WRITE) && | |
1560 | ((brq->data.blocks * brq->data.blksz) >= | |
1561 | card->ext_csd.data_tag_unit_size); | |
1562 | ||
1563 | mmc_set_data_timeout(&brq->data, card); | |
1564 | ||
1565 | brq->data.sg = mqrq->sg; | |
1566 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1567 | ||
1568 | /* | |
1569 | * Adjust the sg list so it is the same size as the | |
1570 | * request. | |
1571 | */ | |
1572 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1573 | int i, data_size = brq->data.blocks << 9; | |
1574 | struct scatterlist *sg; | |
1575 | ||
1576 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1577 | data_size -= sg->length; | |
1578 | if (data_size <= 0) { | |
1579 | sg->length += data_size; | |
1580 | i++; | |
1581 | break; | |
1582 | } | |
1583 | } | |
1584 | brq->data.sg_len = i; | |
1585 | } | |
1586 | ||
1587 | mqrq->areq.mrq = &brq->mrq; | |
1588 | ||
1589 | mmc_queue_bounce_pre(mqrq); | |
1590 | } | |
1591 | ||
1592 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, | |
1593 | struct mmc_card *card, | |
1594 | int disable_multi, | |
1595 | struct mmc_queue *mq) | |
1596 | { | |
1597 | u32 readcmd, writecmd; | |
1598 | struct mmc_blk_request *brq = &mqrq->brq; | |
67e69d52 | 1599 | struct request *req = mmc_queue_req_to_req(mqrq); |
ca5717f7 AH |
1600 | struct mmc_blk_data *md = mq->blkdata; |
1601 | bool do_rel_wr, do_data_tag; | |
1602 | ||
1603 | mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag); | |
1604 | ||
1605 | brq->mrq.cmd = &brq->cmd; | |
1606 | ||
1607 | brq->cmd.arg = blk_rq_pos(req); | |
1608 | if (!mmc_card_blockaddr(card)) | |
1609 | brq->cmd.arg <<= 9; | |
1610 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1611 | ||
54d49d77 PF |
1612 | if (brq->data.blocks > 1 || do_rel_wr) { |
1613 | /* SPI multiblock writes terminate using a special | |
1614 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1615 | */ |
54d49d77 PF |
1616 | if (!mmc_host_is_spi(card->host) || |
1617 | rq_data_dir(req) == READ) | |
1618 | brq->mrq.stop = &brq->stop; | |
1619 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1620 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1621 | } else { | |
1622 | brq->mrq.stop = NULL; | |
1623 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1624 | writecmd = MMC_WRITE_BLOCK; | |
1625 | } | |
ca5717f7 | 1626 | brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd; |
4265900e | 1627 | |
54d49d77 PF |
1628 | /* |
1629 | * Pre-defined multi-block transfers are preferable to | |
1630 | * open ended-ones (and necessary for reliable writes). | |
1631 | * However, it is not sufficient to just send CMD23, | |
1632 | * and avoid the final CMD12, as on an error condition | |
1633 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1634 | * with Auto-CMD23 enhancements provided by some | |
1635 | * hosts, means that the complexity of dealing | |
1636 | * with this is best left to the host. If CMD23 is | |
1637 | * supported by card and host, we'll fill sbc in and let | |
1638 | * the host deal with handling it correctly. This means | |
1639 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1640 | * change of behavior will be observed. | |
1641 | * | |
1642 | * N.B: Some MMC cards experience perf degradation. | |
1643 | * We'll avoid using CMD23-bounded multiblock writes for | |
1644 | * these, while retaining features like reliable writes. | |
1645 | */ | |
4265900e SD |
1646 | if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && |
1647 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || | |
1648 | do_data_tag)) { | |
54d49d77 PF |
1649 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; |
1650 | brq->sbc.arg = brq->data.blocks | | |
4265900e SD |
1651 | (do_rel_wr ? (1 << 31) : 0) | |
1652 | (do_data_tag ? (1 << 29) : 0); | |
54d49d77 PF |
1653 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1654 | brq->mrq.sbc = &brq->sbc; | |
1655 | } | |
98ccf149 | 1656 | |
74f5ba35 | 1657 | mqrq->areq.err_check = mmc_blk_err_check; |
54d49d77 | 1658 | } |
6a79e391 | 1659 | |
0e65f10c LW |
1660 | static bool mmc_blk_rw_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, |
1661 | struct mmc_blk_request *brq, struct request *req, | |
1662 | bool old_req_pending) | |
67716327 | 1663 | { |
0e65f10c LW |
1664 | bool req_pending; |
1665 | ||
67716327 AH |
1666 | /* |
1667 | * If this is an SD card and we're writing, we can first | |
1668 | * mark the known good sectors as ok. | |
1669 | * | |
1670 | * If the card is not SD, we can still ok written sectors | |
1671 | * as reported by the controller (which might be less than | |
1672 | * the real number of written sectors, but never more). | |
1673 | */ | |
1674 | if (mmc_card_sd(card)) { | |
1675 | u32 blocks; | |
169f03a0 | 1676 | int err; |
67716327 | 1677 | |
169f03a0 | 1678 | err = mmc_sd_num_wr_blocks(card, &blocks); |
0e65f10c LW |
1679 | if (err) |
1680 | req_pending = old_req_pending; | |
1681 | else | |
1682 | req_pending = blk_end_request(req, 0, blocks << 9); | |
5dd784d2 | 1683 | } else { |
0e65f10c | 1684 | req_pending = blk_end_request(req, 0, brq->data.bytes_xfered); |
ce39f9d1 | 1685 | } |
0e65f10c | 1686 | return req_pending; |
ce39f9d1 SJ |
1687 | } |
1688 | ||
cdf8a6fb AH |
1689 | static void mmc_blk_rw_cmd_abort(struct mmc_queue *mq, struct mmc_card *card, |
1690 | struct request *req, | |
1691 | struct mmc_queue_req *mqrq) | |
4e1f7800 | 1692 | { |
4e1f7800 LW |
1693 | if (mmc_card_removed(card)) |
1694 | req->rq_flags |= RQF_QUIET; | |
0e65f10c | 1695 | while (blk_end_request(req, -EIO, blk_rq_cur_bytes(req))); |
304419d8 | 1696 | mq->qcnt--; |
4e1f7800 LW |
1697 | } |
1698 | ||
b2928e10 LW |
1699 | /** |
1700 | * mmc_blk_rw_try_restart() - tries to restart the current async request | |
1701 | * @mq: the queue with the card and host to restart | |
1702 | * @req: a new request that want to be started after the current one | |
1703 | */ | |
8ddfe07e AH |
1704 | static void mmc_blk_rw_try_restart(struct mmc_queue *mq, struct request *req, |
1705 | struct mmc_queue_req *mqrq) | |
efb5a05e LW |
1706 | { |
1707 | if (!req) | |
1708 | return; | |
1709 | ||
b2928e10 LW |
1710 | /* |
1711 | * If the card was removed, just cancel everything and return. | |
1712 | */ | |
1713 | if (mmc_card_removed(mq->card)) { | |
efb5a05e LW |
1714 | req->rq_flags |= RQF_QUIET; |
1715 | blk_end_request_all(req, -EIO); | |
304419d8 | 1716 | mq->qcnt--; /* FIXME: just set to 0? */ |
b2928e10 | 1717 | return; |
efb5a05e | 1718 | } |
b2928e10 | 1719 | /* Else proceed and try to restart the current async request */ |
8ddfe07e AH |
1720 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); |
1721 | mmc_start_areq(mq->card->host, &mqrq->areq, NULL); | |
efb5a05e LW |
1722 | } |
1723 | ||
acd8dbd6 | 1724 | static void mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *new_req) |
54d49d77 | 1725 | { |
7db3028e | 1726 | struct mmc_blk_data *md = mq->blkdata; |
54d49d77 | 1727 | struct mmc_card *card = md->queue.card; |
5be80375 | 1728 | struct mmc_blk_request *brq; |
0e65f10c | 1729 | int disable_multi = 0, retry = 0, type, retune_retry_done = 0; |
d78d4a8a | 1730 | enum mmc_blk_status status; |
cdf8a6fb | 1731 | struct mmc_queue_req *mqrq_cur = NULL; |
ee8a43a5 | 1732 | struct mmc_queue_req *mq_rq; |
acd8dbd6 | 1733 | struct request *old_req; |
7d552a48 LW |
1734 | struct mmc_async_req *new_areq; |
1735 | struct mmc_async_req *old_areq; | |
0e65f10c | 1736 | bool req_pending = true; |
1da177e4 | 1737 | |
cdf8a6fb | 1738 | if (new_req) { |
304419d8 LW |
1739 | mqrq_cur = req_to_mmc_queue_req(new_req); |
1740 | mq->qcnt++; | |
cdf8a6fb AH |
1741 | } |
1742 | ||
1743 | if (!mq->qcnt) | |
df061588 | 1744 | return; |
98ccf149 | 1745 | |
ee8a43a5 | 1746 | do { |
acd8dbd6 | 1747 | if (new_req) { |
a5075eb9 SD |
1748 | /* |
1749 | * When 4KB native sector is enabled, only 8 blocks | |
1750 | * multiple read or write is allowed | |
1751 | */ | |
e87c8561 | 1752 | if (mmc_large_sector(card) && |
acd8dbd6 | 1753 | !IS_ALIGNED(blk_rq_sectors(new_req), 8)) { |
a5075eb9 | 1754 | pr_err("%s: Transfer size is not 4KB sector size aligned\n", |
acd8dbd6 | 1755 | new_req->rq_disk->disk_name); |
cdf8a6fb | 1756 | mmc_blk_rw_cmd_abort(mq, card, new_req, mqrq_cur); |
df061588 | 1757 | return; |
a5075eb9 | 1758 | } |
ce39f9d1 | 1759 | |
8ddfe07e AH |
1760 | mmc_blk_rw_rq_prep(mqrq_cur, card, 0, mq); |
1761 | new_areq = &mqrq_cur->areq; | |
ee8a43a5 | 1762 | } else |
7d552a48 LW |
1763 | new_areq = NULL; |
1764 | ||
c3399ef5 | 1765 | old_areq = mmc_start_areq(card->host, new_areq, &status); |
7d552a48 | 1766 | if (!old_areq) { |
da0dbaff LW |
1767 | /* |
1768 | * We have just put the first request into the pipeline | |
1769 | * and there is nothing more to do until it is | |
1770 | * complete. | |
1771 | */ | |
df061588 | 1772 | return; |
2220eedf | 1773 | } |
ee8a43a5 | 1774 | |
da0dbaff LW |
1775 | /* |
1776 | * An asynchronous request has been completed and we proceed | |
1777 | * to handle the result of it. | |
1778 | */ | |
74f5ba35 | 1779 | mq_rq = container_of(old_areq, struct mmc_queue_req, areq); |
ee8a43a5 | 1780 | brq = &mq_rq->brq; |
67e69d52 | 1781 | old_req = mmc_queue_req_to_req(mq_rq); |
acd8dbd6 | 1782 | type = rq_data_dir(old_req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; |
ee8a43a5 | 1783 | mmc_queue_bounce_post(mq_rq); |
98ccf149 | 1784 | |
d78d4a8a PF |
1785 | switch (status) { |
1786 | case MMC_BLK_SUCCESS: | |
1787 | case MMC_BLK_PARTIAL: | |
1788 | /* | |
1789 | * A block was successfully transferred. | |
1790 | */ | |
67716327 | 1791 | mmc_blk_reset_success(md, type); |
ce39f9d1 | 1792 | |
0e65f10c LW |
1793 | req_pending = blk_end_request(old_req, 0, |
1794 | brq->data.bytes_xfered); | |
67716327 AH |
1795 | /* |
1796 | * If the blk_end_request function returns non-zero even | |
1797 | * though all data has been transferred and no errors | |
1798 | * were returned by the host controller, it's a bug. | |
1799 | */ | |
0e65f10c | 1800 | if (status == MMC_BLK_SUCCESS && req_pending) { |
a3c76eb9 | 1801 | pr_err("%s BUG rq_tot %d d_xfer %d\n", |
acd8dbd6 | 1802 | __func__, blk_rq_bytes(old_req), |
ee8a43a5 | 1803 | brq->data.bytes_xfered); |
cdf8a6fb | 1804 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
df061588 | 1805 | return; |
ee8a43a5 | 1806 | } |
d78d4a8a PF |
1807 | break; |
1808 | case MMC_BLK_CMD_ERR: | |
0e65f10c | 1809 | req_pending = mmc_blk_rw_cmd_err(md, card, brq, old_req, req_pending); |
db435505 | 1810 | if (mmc_blk_reset(md, card->host, type)) { |
8ecc3444 | 1811 | if (req_pending) |
cdf8a6fb AH |
1812 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
1813 | else | |
304419d8 | 1814 | mq->qcnt--; |
8ddfe07e | 1815 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 LW |
1816 | return; |
1817 | } | |
0e65f10c | 1818 | if (!req_pending) { |
304419d8 | 1819 | mq->qcnt--; |
8ddfe07e | 1820 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 LW |
1821 | return; |
1822 | } | |
29535f7b | 1823 | break; |
d78d4a8a | 1824 | case MMC_BLK_RETRY: |
b8360a49 | 1825 | retune_retry_done = brq->retune_retry_done; |
d78d4a8a | 1826 | if (retry++ < 5) |
a01f3ccf | 1827 | break; |
67716327 | 1828 | /* Fall through */ |
d78d4a8a | 1829 | case MMC_BLK_ABORT: |
67716327 AH |
1830 | if (!mmc_blk_reset(md, card->host, type)) |
1831 | break; | |
cdf8a6fb | 1832 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
8ddfe07e | 1833 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 | 1834 | return; |
67716327 AH |
1835 | case MMC_BLK_DATA_ERR: { |
1836 | int err; | |
1837 | ||
1838 | err = mmc_blk_reset(md, card->host, type); | |
1839 | if (!err) | |
1840 | break; | |
db435505 | 1841 | if (err == -ENODEV) { |
cdf8a6fb | 1842 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
8ddfe07e | 1843 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 LW |
1844 | return; |
1845 | } | |
67716327 AH |
1846 | /* Fall through */ |
1847 | } | |
1848 | case MMC_BLK_ECC_ERR: | |
1849 | if (brq->data.blocks > 1) { | |
1850 | /* Redo read one sector at a time */ | |
6606110d | 1851 | pr_warn("%s: retrying using single block read\n", |
acd8dbd6 | 1852 | old_req->rq_disk->disk_name); |
67716327 AH |
1853 | disable_multi = 1; |
1854 | break; | |
1855 | } | |
d78d4a8a PF |
1856 | /* |
1857 | * After an error, we redo I/O one sector at a | |
1858 | * time, so we only reach here after trying to | |
1859 | * read a single sector. | |
1860 | */ | |
0e65f10c LW |
1861 | req_pending = blk_end_request(old_req, -EIO, |
1862 | brq->data.blksz); | |
1863 | if (!req_pending) { | |
304419d8 | 1864 | mq->qcnt--; |
8ddfe07e | 1865 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 LW |
1866 | return; |
1867 | } | |
d78d4a8a | 1868 | break; |
a8ad82cc | 1869 | case MMC_BLK_NOMEDIUM: |
cdf8a6fb | 1870 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
8ddfe07e | 1871 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 | 1872 | return; |
2220eedf KD |
1873 | default: |
1874 | pr_err("%s: Unhandled return value (%d)", | |
acd8dbd6 | 1875 | old_req->rq_disk->disk_name, status); |
cdf8a6fb | 1876 | mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); |
8ddfe07e | 1877 | mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); |
db435505 | 1878 | return; |
4c2b8f26 RKAL |
1879 | } |
1880 | ||
0e65f10c | 1881 | if (req_pending) { |
03d640ae LW |
1882 | /* |
1883 | * In case of a incomplete request | |
1884 | * prepare it again and resend. | |
1885 | */ | |
1886 | mmc_blk_rw_rq_prep(mq_rq, card, | |
1887 | disable_multi, mq); | |
c3399ef5 | 1888 | mmc_start_areq(card->host, |
74f5ba35 | 1889 | &mq_rq->areq, NULL); |
b8360a49 | 1890 | mq_rq->brq.retune_retry_done = retune_retry_done; |
ee8a43a5 | 1891 | } |
0e65f10c | 1892 | } while (req_pending); |
cdf8a6fb | 1893 | |
304419d8 | 1894 | mq->qcnt--; |
1da177e4 LT |
1895 | } |
1896 | ||
df061588 | 1897 | void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
bd788c96 | 1898 | { |
1a258db6 | 1899 | int ret; |
7db3028e | 1900 | struct mmc_blk_data *md = mq->blkdata; |
1a258db6 AW |
1901 | struct mmc_card *card = md->queue.card; |
1902 | ||
cdf8a6fb | 1903 | if (req && !mq->qcnt) |
ee8a43a5 | 1904 | /* claim host only for the first request */ |
e94cfef6 | 1905 | mmc_get_card(card); |
ee8a43a5 | 1906 | |
371a689f AW |
1907 | ret = mmc_blk_part_switch(card, md); |
1908 | if (ret) { | |
0d7d85ca | 1909 | if (req) { |
ecf8b5d0 | 1910 | blk_end_request_all(req, -EIO); |
0d7d85ca | 1911 | } |
371a689f AW |
1912 | goto out; |
1913 | } | |
1a258db6 | 1914 | |
614f0388 LW |
1915 | if (req) { |
1916 | switch (req_op(req)) { | |
1917 | case REQ_OP_DRV_IN: | |
1918 | case REQ_OP_DRV_OUT: | |
1919 | /* | |
1920 | * Complete ongoing async transfer before issuing | |
1921 | * ioctl()s | |
1922 | */ | |
1923 | if (mq->qcnt) | |
1924 | mmc_blk_issue_rw_rq(mq, NULL); | |
02166a01 | 1925 | mmc_blk_issue_drv_op(mq, req); |
614f0388 LW |
1926 | break; |
1927 | case REQ_OP_DISCARD: | |
1928 | /* | |
1929 | * Complete ongoing async transfer before issuing | |
1930 | * discard. | |
1931 | */ | |
1932 | if (mq->qcnt) | |
1933 | mmc_blk_issue_rw_rq(mq, NULL); | |
1934 | mmc_blk_issue_discard_rq(mq, req); | |
1935 | break; | |
1936 | case REQ_OP_SECURE_ERASE: | |
1937 | /* | |
1938 | * Complete ongoing async transfer before issuing | |
1939 | * secure erase. | |
1940 | */ | |
1941 | if (mq->qcnt) | |
1942 | mmc_blk_issue_rw_rq(mq, NULL); | |
1943 | mmc_blk_issue_secdiscard_rq(mq, req); | |
1944 | break; | |
1945 | case REQ_OP_FLUSH: | |
1946 | /* | |
1947 | * Complete ongoing async transfer before issuing | |
1948 | * flush. | |
1949 | */ | |
1950 | if (mq->qcnt) | |
1951 | mmc_blk_issue_rw_rq(mq, NULL); | |
1952 | mmc_blk_issue_flush(mq, req); | |
1953 | break; | |
1954 | default: | |
1955 | /* Normal request, just issue it */ | |
1956 | mmc_blk_issue_rw_rq(mq, req); | |
1957 | card->host->context_info.is_waiting_last_req = false; | |
1958 | break; | |
1959 | }; | |
49804548 | 1960 | } else { |
614f0388 LW |
1961 | /* No request, flushing the pipeline with NULL */ |
1962 | mmc_blk_issue_rw_rq(mq, NULL); | |
2602b740 | 1963 | card->host->context_info.is_waiting_last_req = false; |
49804548 | 1964 | } |
1a258db6 | 1965 | |
371a689f | 1966 | out: |
cdf8a6fb | 1967 | if (!mq->qcnt) |
e94cfef6 | 1968 | mmc_put_card(card); |
bd788c96 | 1969 | } |
1da177e4 | 1970 | |
a6f6c96b RK |
1971 | static inline int mmc_blk_readonly(struct mmc_card *card) |
1972 | { | |
1973 | return mmc_card_readonly(card) || | |
1974 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
1975 | } | |
1976 | ||
371a689f AW |
1977 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
1978 | struct device *parent, | |
1979 | sector_t size, | |
1980 | bool default_ro, | |
add710ea JR |
1981 | const char *subname, |
1982 | int area_type) | |
1da177e4 LT |
1983 | { |
1984 | struct mmc_blk_data *md; | |
1985 | int devidx, ret; | |
1986 | ||
a04848c7 HK |
1987 | devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); |
1988 | if (devidx < 0) | |
1989 | return ERR_PTR(devidx); | |
1da177e4 | 1990 | |
dd00cc48 | 1991 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
1992 | if (!md) { |
1993 | ret = -ENOMEM; | |
1994 | goto out; | |
1995 | } | |
1da177e4 | 1996 | |
add710ea JR |
1997 | md->area_type = area_type; |
1998 | ||
a6f6c96b RK |
1999 | /* |
2000 | * Set the read-only status based on the supported commands | |
2001 | * and the write protect switch. | |
2002 | */ | |
2003 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 2004 | |
5e71b7a6 | 2005 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
2006 | if (md->disk == NULL) { |
2007 | ret = -ENOMEM; | |
2008 | goto err_kfree; | |
2009 | } | |
1da177e4 | 2010 | |
a6f6c96b | 2011 | spin_lock_init(&md->lock); |
371a689f | 2012 | INIT_LIST_HEAD(&md->part); |
a6f6c96b | 2013 | md->usage = 1; |
1da177e4 | 2014 | |
d09408ad | 2015 | ret = mmc_init_queue(&md->queue, card, &md->lock, subname); |
a6f6c96b RK |
2016 | if (ret) |
2017 | goto err_putdisk; | |
1da177e4 | 2018 | |
7db3028e | 2019 | md->queue.blkdata = md; |
d2b18394 | 2020 | |
fe6b4c88 | 2021 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 2022 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
2023 | md->disk->fops = &mmc_bdops; |
2024 | md->disk->private_data = md; | |
2025 | md->disk->queue = md->queue.queue; | |
307d8e6f | 2026 | md->parent = parent; |
371a689f | 2027 | set_disk_ro(md->disk, md->read_only || default_ro); |
382c55f8 | 2028 | md->disk->flags = GENHD_FL_EXT_DEVT; |
f5b4d71f | 2029 | if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) |
53d8f974 | 2030 | md->disk->flags |= GENHD_FL_NO_PART_SCAN; |
a6f6c96b RK |
2031 | |
2032 | /* | |
2033 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
2034 | * | |
2035 | * - be set for removable media with permanent block devices | |
2036 | * - be unset for removable block devices with permanent media | |
2037 | * | |
2038 | * Since MMC block devices clearly fall under the second | |
2039 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
2040 | * should use the block device creation/destruction hotplug | |
2041 | * messages to tell when the card is present. | |
2042 | */ | |
2043 | ||
f06c9153 | 2044 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
9aaf3437 | 2045 | "mmcblk%u%s", card->host->index, subname ? subname : ""); |
a6f6c96b | 2046 | |
a5075eb9 SD |
2047 | if (mmc_card_mmc(card)) |
2048 | blk_queue_logical_block_size(md->queue.queue, | |
2049 | card->ext_csd.data_sector_size); | |
2050 | else | |
2051 | blk_queue_logical_block_size(md->queue.queue, 512); | |
2052 | ||
371a689f | 2053 | set_capacity(md->disk, size); |
d0c97cfb | 2054 | |
f0d89972 | 2055 | if (mmc_host_cmd23(card->host)) { |
0ed50abb DG |
2056 | if ((mmc_card_mmc(card) && |
2057 | card->csd.mmca_vsn >= CSD_SPEC_VER_3) || | |
f0d89972 AW |
2058 | (mmc_card_sd(card) && |
2059 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
2060 | md->flags |= MMC_BLK_CMD23; | |
2061 | } | |
d0c97cfb AW |
2062 | |
2063 | if (mmc_card_mmc(card) && | |
2064 | md->flags & MMC_BLK_CMD23 && | |
2065 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || | |
2066 | card->ext_csd.rel_sectors)) { | |
2067 | md->flags |= MMC_BLK_REL_WR; | |
e9d5c746 | 2068 | blk_queue_write_cache(md->queue.queue, true, true); |
d0c97cfb AW |
2069 | } |
2070 | ||
371a689f AW |
2071 | return md; |
2072 | ||
2073 | err_putdisk: | |
2074 | put_disk(md->disk); | |
2075 | err_kfree: | |
2076 | kfree(md); | |
2077 | out: | |
a04848c7 | 2078 | ida_simple_remove(&mmc_blk_ida, devidx); |
371a689f AW |
2079 | return ERR_PTR(ret); |
2080 | } | |
2081 | ||
2082 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
2083 | { | |
2084 | sector_t size; | |
a6f6c96b | 2085 | |
85a18ad9 PO |
2086 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
2087 | /* | |
2088 | * The EXT_CSD sector count is in number or 512 byte | |
2089 | * sectors. | |
2090 | */ | |
371a689f | 2091 | size = card->ext_csd.sectors; |
85a18ad9 PO |
2092 | } else { |
2093 | /* | |
2094 | * The CSD capacity field is in units of read_blkbits. | |
2095 | * set_capacity takes units of 512 bytes. | |
2096 | */ | |
087de9ed KM |
2097 | size = (typeof(sector_t))card->csd.capacity |
2098 | << (card->csd.read_blkbits - 9); | |
85a18ad9 | 2099 | } |
371a689f | 2100 | |
7a30f2af | 2101 | return mmc_blk_alloc_req(card, &card->dev, size, false, NULL, |
add710ea | 2102 | MMC_BLK_DATA_AREA_MAIN); |
371a689f | 2103 | } |
a6f6c96b | 2104 | |
371a689f AW |
2105 | static int mmc_blk_alloc_part(struct mmc_card *card, |
2106 | struct mmc_blk_data *md, | |
2107 | unsigned int part_type, | |
2108 | sector_t size, | |
2109 | bool default_ro, | |
add710ea JR |
2110 | const char *subname, |
2111 | int area_type) | |
371a689f AW |
2112 | { |
2113 | char cap_str[10]; | |
2114 | struct mmc_blk_data *part_md; | |
2115 | ||
2116 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
add710ea | 2117 | subname, area_type); |
371a689f AW |
2118 | if (IS_ERR(part_md)) |
2119 | return PTR_ERR(part_md); | |
2120 | part_md->part_type = part_type; | |
2121 | list_add(&part_md->part, &md->part); | |
2122 | ||
b9f28d86 | 2123 | string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2, |
371a689f | 2124 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2125 | pr_info("%s: %s %s partition %u %s\n", |
371a689f AW |
2126 | part_md->disk->disk_name, mmc_card_id(card), |
2127 | mmc_card_name(card), part_md->part_type, cap_str); | |
2128 | return 0; | |
2129 | } | |
2130 | ||
e0c368d5 NJ |
2131 | /* MMC Physical partitions consist of two boot partitions and |
2132 | * up to four general purpose partitions. | |
2133 | * For each partition enabled in EXT_CSD a block device will be allocatedi | |
2134 | * to provide access to the partition. | |
2135 | */ | |
2136 | ||
371a689f AW |
2137 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) |
2138 | { | |
e0c368d5 | 2139 | int idx, ret = 0; |
371a689f AW |
2140 | |
2141 | if (!mmc_card_mmc(card)) | |
2142 | return 0; | |
2143 | ||
e0c368d5 NJ |
2144 | for (idx = 0; idx < card->nr_parts; idx++) { |
2145 | if (card->part[idx].size) { | |
2146 | ret = mmc_blk_alloc_part(card, md, | |
2147 | card->part[idx].part_cfg, | |
2148 | card->part[idx].size >> 9, | |
2149 | card->part[idx].force_ro, | |
add710ea JR |
2150 | card->part[idx].name, |
2151 | card->part[idx].area_type); | |
e0c368d5 NJ |
2152 | if (ret) |
2153 | return ret; | |
2154 | } | |
371a689f AW |
2155 | } |
2156 | ||
2157 | return ret; | |
1da177e4 LT |
2158 | } |
2159 | ||
371a689f AW |
2160 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
2161 | { | |
add710ea JR |
2162 | struct mmc_card *card; |
2163 | ||
371a689f | 2164 | if (md) { |
fdfa20c1 PT |
2165 | /* |
2166 | * Flush remaining requests and free queues. It | |
2167 | * is freeing the queue that stops new requests | |
2168 | * from being accepted. | |
2169 | */ | |
8efb83a2 | 2170 | card = md->queue.card; |
fdfa20c1 | 2171 | mmc_cleanup_queue(&md->queue); |
371a689f AW |
2172 | if (md->disk->flags & GENHD_FL_UP) { |
2173 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
add710ea JR |
2174 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && |
2175 | card->ext_csd.boot_ro_lockable) | |
2176 | device_remove_file(disk_to_dev(md->disk), | |
2177 | &md->power_ro_lock); | |
371a689f | 2178 | |
371a689f AW |
2179 | del_gendisk(md->disk); |
2180 | } | |
371a689f AW |
2181 | mmc_blk_put(md); |
2182 | } | |
2183 | } | |
2184 | ||
2185 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
2186 | struct mmc_blk_data *md) | |
2187 | { | |
2188 | struct list_head *pos, *q; | |
2189 | struct mmc_blk_data *part_md; | |
2190 | ||
2191 | list_for_each_safe(pos, q, &md->part) { | |
2192 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
2193 | list_del(pos); | |
2194 | mmc_blk_remove_req(part_md); | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | static int mmc_add_disk(struct mmc_blk_data *md) | |
2199 | { | |
2200 | int ret; | |
add710ea | 2201 | struct mmc_card *card = md->queue.card; |
371a689f | 2202 | |
307d8e6f | 2203 | device_add_disk(md->parent, md->disk); |
371a689f AW |
2204 | md->force_ro.show = force_ro_show; |
2205 | md->force_ro.store = force_ro_store; | |
641c3187 | 2206 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
2207 | md->force_ro.attr.name = "force_ro"; |
2208 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
2209 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
2210 | if (ret) | |
add710ea JR |
2211 | goto force_ro_fail; |
2212 | ||
2213 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && | |
2214 | card->ext_csd.boot_ro_lockable) { | |
88187398 | 2215 | umode_t mode; |
add710ea JR |
2216 | |
2217 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS) | |
2218 | mode = S_IRUGO; | |
2219 | else | |
2220 | mode = S_IRUGO | S_IWUSR; | |
2221 | ||
2222 | md->power_ro_lock.show = power_ro_lock_show; | |
2223 | md->power_ro_lock.store = power_ro_lock_store; | |
00d9ac08 | 2224 | sysfs_attr_init(&md->power_ro_lock.attr); |
add710ea JR |
2225 | md->power_ro_lock.attr.mode = mode; |
2226 | md->power_ro_lock.attr.name = | |
2227 | "ro_lock_until_next_power_on"; | |
2228 | ret = device_create_file(disk_to_dev(md->disk), | |
2229 | &md->power_ro_lock); | |
2230 | if (ret) | |
2231 | goto power_ro_lock_fail; | |
2232 | } | |
2233 | return ret; | |
2234 | ||
2235 | power_ro_lock_fail: | |
2236 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
2237 | force_ro_fail: | |
2238 | del_gendisk(md->disk); | |
371a689f AW |
2239 | |
2240 | return ret; | |
2241 | } | |
2242 | ||
96541bac | 2243 | static int mmc_blk_probe(struct mmc_card *card) |
1da177e4 | 2244 | { |
371a689f | 2245 | struct mmc_blk_data *md, *part_md; |
a7bbb573 PO |
2246 | char cap_str[10]; |
2247 | ||
912490db PO |
2248 | /* |
2249 | * Check that the card supports the command class(es) we need. | |
2250 | */ | |
2251 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
2252 | return -ENODEV; |
2253 | ||
8c7cdbf9 | 2254 | mmc_fixup_device(card, mmc_blk_fixups); |
5204d00f | 2255 | |
1da177e4 | 2256 | md = mmc_blk_alloc(card); |
304419d8 | 2257 | if (IS_ERR(md)) |
1da177e4 LT |
2258 | return PTR_ERR(md); |
2259 | ||
b9f28d86 | 2260 | string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, |
a7bbb573 | 2261 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2262 | pr_info("%s: %s %s %s %s\n", |
1da177e4 | 2263 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 2264 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 2265 | |
371a689f AW |
2266 | if (mmc_blk_alloc_parts(card, md)) |
2267 | goto out; | |
2268 | ||
96541bac | 2269 | dev_set_drvdata(&card->dev, md); |
6f60c222 | 2270 | |
371a689f AW |
2271 | if (mmc_add_disk(md)) |
2272 | goto out; | |
2273 | ||
2274 | list_for_each_entry(part_md, &md->part, part) { | |
2275 | if (mmc_add_disk(part_md)) | |
2276 | goto out; | |
2277 | } | |
e94cfef6 UH |
2278 | |
2279 | pm_runtime_set_autosuspend_delay(&card->dev, 3000); | |
2280 | pm_runtime_use_autosuspend(&card->dev); | |
2281 | ||
2282 | /* | |
2283 | * Don't enable runtime PM for SD-combo cards here. Leave that | |
2284 | * decision to be taken during the SDIO init sequence instead. | |
2285 | */ | |
2286 | if (card->type != MMC_TYPE_SD_COMBO) { | |
2287 | pm_runtime_set_active(&card->dev); | |
2288 | pm_runtime_enable(&card->dev); | |
2289 | } | |
2290 | ||
1da177e4 LT |
2291 | return 0; |
2292 | ||
2293 | out: | |
371a689f AW |
2294 | mmc_blk_remove_parts(card, md); |
2295 | mmc_blk_remove_req(md); | |
5865f287 | 2296 | return 0; |
1da177e4 LT |
2297 | } |
2298 | ||
96541bac | 2299 | static void mmc_blk_remove(struct mmc_card *card) |
1da177e4 | 2300 | { |
96541bac | 2301 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 | 2302 | |
371a689f | 2303 | mmc_blk_remove_parts(card, md); |
e94cfef6 | 2304 | pm_runtime_get_sync(&card->dev); |
ddd6fa7e AH |
2305 | mmc_claim_host(card->host); |
2306 | mmc_blk_part_switch(card, md); | |
2307 | mmc_release_host(card->host); | |
e94cfef6 UH |
2308 | if (card->type != MMC_TYPE_SD_COMBO) |
2309 | pm_runtime_disable(&card->dev); | |
2310 | pm_runtime_put_noidle(&card->dev); | |
371a689f | 2311 | mmc_blk_remove_req(md); |
96541bac | 2312 | dev_set_drvdata(&card->dev, NULL); |
1da177e4 LT |
2313 | } |
2314 | ||
96541bac | 2315 | static int _mmc_blk_suspend(struct mmc_card *card) |
1da177e4 | 2316 | { |
371a689f | 2317 | struct mmc_blk_data *part_md; |
96541bac | 2318 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 LT |
2319 | |
2320 | if (md) { | |
2321 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
2322 | list_for_each_entry(part_md, &md->part, part) { |
2323 | mmc_queue_suspend(&part_md->queue); | |
2324 | } | |
1da177e4 LT |
2325 | } |
2326 | return 0; | |
2327 | } | |
2328 | ||
96541bac | 2329 | static void mmc_blk_shutdown(struct mmc_card *card) |
76287748 | 2330 | { |
96541bac | 2331 | _mmc_blk_suspend(card); |
76287748 UH |
2332 | } |
2333 | ||
0967edc6 UH |
2334 | #ifdef CONFIG_PM_SLEEP |
2335 | static int mmc_blk_suspend(struct device *dev) | |
76287748 | 2336 | { |
96541bac UH |
2337 | struct mmc_card *card = mmc_dev_to_card(dev); |
2338 | ||
2339 | return _mmc_blk_suspend(card); | |
76287748 UH |
2340 | } |
2341 | ||
0967edc6 | 2342 | static int mmc_blk_resume(struct device *dev) |
1da177e4 | 2343 | { |
371a689f | 2344 | struct mmc_blk_data *part_md; |
fc95e30b | 2345 | struct mmc_blk_data *md = dev_get_drvdata(dev); |
1da177e4 LT |
2346 | |
2347 | if (md) { | |
371a689f AW |
2348 | /* |
2349 | * Resume involves the card going into idle state, | |
2350 | * so current partition is always the main one. | |
2351 | */ | |
2352 | md->part_curr = md->part_type; | |
1da177e4 | 2353 | mmc_queue_resume(&md->queue); |
371a689f AW |
2354 | list_for_each_entry(part_md, &md->part, part) { |
2355 | mmc_queue_resume(&part_md->queue); | |
2356 | } | |
1da177e4 LT |
2357 | } |
2358 | return 0; | |
2359 | } | |
1da177e4 LT |
2360 | #endif |
2361 | ||
0967edc6 UH |
2362 | static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume); |
2363 | ||
96541bac UH |
2364 | static struct mmc_driver mmc_driver = { |
2365 | .drv = { | |
2366 | .name = "mmcblk", | |
2367 | .pm = &mmc_blk_pm_ops, | |
2368 | }, | |
1da177e4 LT |
2369 | .probe = mmc_blk_probe, |
2370 | .remove = mmc_blk_remove, | |
76287748 | 2371 | .shutdown = mmc_blk_shutdown, |
1da177e4 LT |
2372 | }; |
2373 | ||
2374 | static int __init mmc_blk_init(void) | |
2375 | { | |
9d4e98e9 | 2376 | int res; |
1da177e4 | 2377 | |
5e71b7a6 OJ |
2378 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
2379 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
2380 | ||
a26eba61 | 2381 | max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors); |
5e71b7a6 | 2382 | |
fe6b4c88 PO |
2383 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
2384 | if (res) | |
1da177e4 | 2385 | goto out; |
1da177e4 | 2386 | |
9d4e98e9 AM |
2387 | res = mmc_register_driver(&mmc_driver); |
2388 | if (res) | |
2389 | goto out2; | |
1da177e4 | 2390 | |
9d4e98e9 AM |
2391 | return 0; |
2392 | out2: | |
2393 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); | |
1da177e4 LT |
2394 | out: |
2395 | return res; | |
2396 | } | |
2397 | ||
2398 | static void __exit mmc_blk_exit(void) | |
2399 | { | |
2400 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 2401 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
2402 | } |
2403 | ||
2404 | module_init(mmc_blk_init); | |
2405 | module_exit(mmc_blk_exit); | |
2406 | ||
2407 | MODULE_LICENSE("GPL"); | |
2408 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
2409 |