Commit | Line | Data |
---|---|---|
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> | |
97548575 | 31 | #include <linux/cdev.h> |
a621aaed | 32 | #include <linux/mutex.h> |
ec5a19dd | 33 | #include <linux/scatterlist.h> |
a7bbb573 | 34 | #include <linux/string_helpers.h> |
cb87ea28 JC |
35 | #include <linux/delay.h> |
36 | #include <linux/capability.h> | |
37 | #include <linux/compat.h> | |
e94cfef6 | 38 | #include <linux/pm_runtime.h> |
b10fa99e | 39 | #include <linux/idr.h> |
627c3ccf | 40 | #include <linux/debugfs.h> |
1da177e4 | 41 | |
cb87ea28 | 42 | #include <linux/mmc/ioctl.h> |
1da177e4 | 43 | #include <linux/mmc/card.h> |
385e3227 | 44 | #include <linux/mmc/host.h> |
da7fbe58 PO |
45 | #include <linux/mmc/mmc.h> |
46 | #include <linux/mmc/sd.h> | |
1da177e4 | 47 | |
7c0f6ba6 | 48 | #include <linux/uaccess.h> |
1da177e4 | 49 | |
98ac2162 | 50 | #include "queue.h" |
48ab086d | 51 | #include "block.h" |
55244c56 | 52 | #include "core.h" |
4facdde1 | 53 | #include "card.h" |
5857b29b | 54 | #include "host.h" |
4facdde1 | 55 | #include "bus.h" |
55244c56 | 56 | #include "mmc_ops.h" |
28fc64af | 57 | #include "quirks.h" |
55244c56 | 58 | #include "sd_ops.h" |
1da177e4 | 59 | |
6b0b6285 | 60 | MODULE_ALIAS("mmc:block"); |
5e71b7a6 OJ |
61 | #ifdef MODULE_PARAM_PREFIX |
62 | #undef MODULE_PARAM_PREFIX | |
63 | #endif | |
64 | #define MODULE_PARAM_PREFIX "mmcblk." | |
65 | ||
6b7a363d AH |
66 | /* |
67 | * Set a 10 second timeout for polling write request busy state. Note, mmc core | |
68 | * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10 | |
69 | * second software timer to timeout the whole request, so 10 seconds should be | |
70 | * ample. | |
71 | */ | |
72 | #define MMC_BLK_TIMEOUT_MS (10 * 1000) | |
775a9362 ME |
73 | #define MMC_SANITIZE_REQ_TIMEOUT 240000 |
74 | #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) | |
a0e95766 | 75 | #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) |
6a7a6b45 | 76 | |
d3df0465 | 77 | #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \ |
ce39f9d1 | 78 | (rq_data_dir(req) == WRITE)) |
5e71b7a6 | 79 | static 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 | 85 | static 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 | */ |
92 | static int max_devices; | |
93 | ||
a26eba61 BH |
94 | #define MAX_DEVICES 256 |
95 | ||
b10fa99e | 96 | static DEFINE_IDA(mmc_blk_ida); |
97548575 | 97 | static DEFINE_IDA(mmc_rpmb_ida); |
1da177e4 | 98 | |
1da177e4 LT |
99 | /* |
100 | * There is one mmc_blk_data per slot. | |
101 | */ | |
102 | struct mmc_blk_data { | |
307d8e6f | 103 | struct device *parent; |
1da177e4 LT |
104 | struct gendisk *disk; |
105 | struct mmc_queue queue; | |
371a689f | 106 | struct list_head part; |
97548575 | 107 | struct list_head rpmbs; |
1da177e4 | 108 | |
d0c97cfb AW |
109 | unsigned int flags; |
110 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
111 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
112 | ||
1da177e4 | 113 | unsigned int usage; |
a6f6c96b | 114 | unsigned int read_only; |
371a689f | 115 | unsigned int part_type; |
67716327 AH |
116 | unsigned int reset_done; |
117 | #define MMC_BLK_READ BIT(0) | |
118 | #define MMC_BLK_WRITE BIT(1) | |
119 | #define MMC_BLK_DISCARD BIT(2) | |
120 | #define MMC_BLK_SECDISCARD BIT(3) | |
1e8e55b6 | 121 | #define MMC_BLK_CQE_RECOVERY BIT(4) |
371a689f AW |
122 | |
123 | /* | |
124 | * Only set in main mmc_blk_data associated | |
fc95e30b | 125 | * with mmc_card with dev_set_drvdata, and keeps |
371a689f AW |
126 | * track of the current selected device partition. |
127 | */ | |
128 | unsigned int part_curr; | |
129 | struct device_attribute force_ro; | |
add710ea JR |
130 | struct device_attribute power_ro_lock; |
131 | int area_type; | |
f9f0da98 AH |
132 | |
133 | /* debugfs files (only in main mmc_blk_data) */ | |
134 | struct dentry *status_dentry; | |
135 | struct dentry *ext_csd_dentry; | |
1da177e4 LT |
136 | }; |
137 | ||
97548575 LW |
138 | /* Device type for RPMB character devices */ |
139 | static dev_t mmc_rpmb_devt; | |
140 | ||
141 | /* Bus type for RPMB character devices */ | |
142 | static struct bus_type mmc_rpmb_bus_type = { | |
143 | .name = "mmc_rpmb", | |
144 | }; | |
145 | ||
146 | /** | |
147 | * struct mmc_rpmb_data - special RPMB device type for these areas | |
148 | * @dev: the device for the RPMB area | |
149 | * @chrdev: character device for the RPMB area | |
150 | * @id: unique device ID number | |
151 | * @part_index: partition index (0 on first) | |
152 | * @md: parent MMC block device | |
153 | * @node: list item, so we can put this device on a list | |
154 | */ | |
155 | struct mmc_rpmb_data { | |
156 | struct device dev; | |
157 | struct cdev chrdev; | |
158 | int id; | |
159 | unsigned int part_index; | |
160 | struct mmc_blk_data *md; | |
161 | struct list_head node; | |
162 | }; | |
163 | ||
a621aaed | 164 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 165 | |
5e71b7a6 OJ |
166 | module_param(perdev_minors, int, 0444); |
167 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
168 | ||
8d1e977d | 169 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 170 | unsigned int part_type); |
cdf8a6fb | 171 | |
1da177e4 LT |
172 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
173 | { | |
174 | struct mmc_blk_data *md; | |
175 | ||
a621aaed | 176 | mutex_lock(&open_lock); |
1da177e4 LT |
177 | md = disk->private_data; |
178 | if (md && md->usage == 0) | |
179 | md = NULL; | |
180 | if (md) | |
181 | md->usage++; | |
a621aaed | 182 | mutex_unlock(&open_lock); |
1da177e4 LT |
183 | |
184 | return md; | |
185 | } | |
186 | ||
371a689f AW |
187 | static inline int mmc_get_devidx(struct gendisk *disk) |
188 | { | |
382c55f8 | 189 | int devidx = disk->first_minor / perdev_minors; |
371a689f AW |
190 | return devidx; |
191 | } | |
192 | ||
1da177e4 LT |
193 | static void mmc_blk_put(struct mmc_blk_data *md) |
194 | { | |
a621aaed | 195 | mutex_lock(&open_lock); |
1da177e4 LT |
196 | md->usage--; |
197 | if (md->usage == 0) { | |
371a689f | 198 | int devidx = mmc_get_devidx(md->disk); |
41e3efd0 | 199 | blk_put_queue(md->queue.queue); |
a04848c7 | 200 | ida_simple_remove(&mmc_blk_ida, devidx); |
1da177e4 | 201 | put_disk(md->disk); |
1da177e4 LT |
202 | kfree(md); |
203 | } | |
a621aaed | 204 | mutex_unlock(&open_lock); |
1da177e4 LT |
205 | } |
206 | ||
add710ea JR |
207 | static ssize_t power_ro_lock_show(struct device *dev, |
208 | struct device_attribute *attr, char *buf) | |
209 | { | |
210 | int ret; | |
211 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
212 | struct mmc_card *card = md->queue.card; | |
213 | int locked = 0; | |
214 | ||
215 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN) | |
216 | locked = 2; | |
217 | else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) | |
218 | locked = 1; | |
219 | ||
220 | ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); | |
221 | ||
9098f84c TW |
222 | mmc_blk_put(md); |
223 | ||
add710ea JR |
224 | return ret; |
225 | } | |
226 | ||
227 | static ssize_t power_ro_lock_store(struct device *dev, | |
228 | struct device_attribute *attr, const char *buf, size_t count) | |
229 | { | |
230 | int ret; | |
231 | struct mmc_blk_data *md, *part_md; | |
0493f6fe LW |
232 | struct mmc_queue *mq; |
233 | struct request *req; | |
add710ea JR |
234 | unsigned long set; |
235 | ||
236 | if (kstrtoul(buf, 0, &set)) | |
237 | return -EINVAL; | |
238 | ||
239 | if (set != 1) | |
240 | return count; | |
241 | ||
242 | md = mmc_blk_get(dev_to_disk(dev)); | |
0493f6fe | 243 | mq = &md->queue; |
add710ea | 244 | |
0493f6fe | 245 | /* Dispatch locking to the block layer */ |
ff005a06 | 246 | req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0); |
fb8e456e AH |
247 | if (IS_ERR(req)) { |
248 | count = PTR_ERR(req); | |
249 | goto out_put; | |
250 | } | |
0493f6fe LW |
251 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; |
252 | blk_execute_rq(mq->queue, NULL, req, 0); | |
253 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 254 | blk_put_request(req); |
add710ea JR |
255 | |
256 | if (!ret) { | |
257 | pr_info("%s: Locking boot partition ro until next power on\n", | |
258 | md->disk->disk_name); | |
259 | set_disk_ro(md->disk, 1); | |
260 | ||
261 | list_for_each_entry(part_md, &md->part, part) | |
262 | if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) { | |
263 | pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name); | |
264 | set_disk_ro(part_md->disk, 1); | |
265 | } | |
266 | } | |
fb8e456e | 267 | out_put: |
add710ea JR |
268 | mmc_blk_put(md); |
269 | return count; | |
270 | } | |
271 | ||
371a689f AW |
272 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
273 | char *buf) | |
274 | { | |
275 | int ret; | |
276 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
277 | ||
0031a98a | 278 | ret = snprintf(buf, PAGE_SIZE, "%d\n", |
371a689f AW |
279 | get_disk_ro(dev_to_disk(dev)) ^ |
280 | md->read_only); | |
281 | mmc_blk_put(md); | |
282 | return ret; | |
283 | } | |
284 | ||
285 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
286 | const char *buf, size_t count) | |
287 | { | |
288 | int ret; | |
289 | char *end; | |
290 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
291 | unsigned long set = simple_strtoul(buf, &end, 0); | |
292 | if (end == buf) { | |
293 | ret = -EINVAL; | |
294 | goto out; | |
295 | } | |
296 | ||
297 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
298 | ret = count; | |
299 | out: | |
300 | mmc_blk_put(md); | |
301 | return ret; | |
302 | } | |
303 | ||
a5a1561f | 304 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 305 | { |
a5a1561f | 306 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
307 | int ret = -ENXIO; |
308 | ||
2a48fc0a | 309 | mutex_lock(&block_mutex); |
1da177e4 LT |
310 | if (md) { |
311 | if (md->usage == 2) | |
a5a1561f | 312 | check_disk_change(bdev); |
1da177e4 | 313 | ret = 0; |
a00fc090 | 314 | |
a5a1561f | 315 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 316 | mmc_blk_put(md); |
a00fc090 | 317 | ret = -EROFS; |
70bb0896 | 318 | } |
1da177e4 | 319 | } |
2a48fc0a | 320 | mutex_unlock(&block_mutex); |
1da177e4 LT |
321 | |
322 | return ret; | |
323 | } | |
324 | ||
db2a144b | 325 | static void mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 326 | { |
a5a1561f | 327 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 328 | |
2a48fc0a | 329 | mutex_lock(&block_mutex); |
1da177e4 | 330 | mmc_blk_put(md); |
2a48fc0a | 331 | mutex_unlock(&block_mutex); |
1da177e4 LT |
332 | } |
333 | ||
334 | static int | |
a885c8c4 | 335 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 336 | { |
a885c8c4 CH |
337 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
338 | geo->heads = 4; | |
339 | geo->sectors = 16; | |
340 | return 0; | |
1da177e4 LT |
341 | } |
342 | ||
cb87ea28 JC |
343 | struct mmc_blk_ioc_data { |
344 | struct mmc_ioc_cmd ic; | |
345 | unsigned char *buf; | |
346 | u64 buf_bytes; | |
97548575 | 347 | struct mmc_rpmb_data *rpmb; |
cb87ea28 JC |
348 | }; |
349 | ||
350 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
351 | struct mmc_ioc_cmd __user *user) | |
352 | { | |
353 | struct mmc_blk_ioc_data *idata; | |
354 | int err; | |
355 | ||
1ff8950c | 356 | idata = kmalloc(sizeof(*idata), GFP_KERNEL); |
cb87ea28 JC |
357 | if (!idata) { |
358 | err = -ENOMEM; | |
aea253ec | 359 | goto out; |
cb87ea28 JC |
360 | } |
361 | ||
362 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
363 | err = -EFAULT; | |
aea253ec | 364 | goto idata_err; |
cb87ea28 JC |
365 | } |
366 | ||
367 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
368 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
369 | err = -EOVERFLOW; | |
aea253ec | 370 | goto idata_err; |
cb87ea28 JC |
371 | } |
372 | ||
bfe5b1b1 VV |
373 | if (!idata->buf_bytes) { |
374 | idata->buf = NULL; | |
4d6144de | 375 | return idata; |
bfe5b1b1 | 376 | } |
4d6144de | 377 | |
97a0c313 ME |
378 | idata->buf = memdup_user((void __user *)(unsigned long) |
379 | idata->ic.data_ptr, idata->buf_bytes); | |
380 | if (IS_ERR(idata->buf)) { | |
381 | err = PTR_ERR(idata->buf); | |
aea253ec | 382 | goto idata_err; |
cb87ea28 JC |
383 | } |
384 | ||
cb87ea28 JC |
385 | return idata; |
386 | ||
aea253ec | 387 | idata_err: |
cb87ea28 | 388 | kfree(idata); |
aea253ec | 389 | out: |
cb87ea28 | 390 | return ERR_PTR(err); |
cb87ea28 JC |
391 | } |
392 | ||
a5f5774c JH |
393 | static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, |
394 | struct mmc_blk_ioc_data *idata) | |
395 | { | |
396 | struct mmc_ioc_cmd *ic = &idata->ic; | |
397 | ||
398 | if (copy_to_user(&(ic_ptr->response), ic->response, | |
399 | sizeof(ic->response))) | |
400 | return -EFAULT; | |
401 | ||
402 | if (!idata->ic.write_flag) { | |
403 | if (copy_to_user((void __user *)(unsigned long)ic->data_ptr, | |
404 | idata->buf, idata->buf_bytes)) | |
405 | return -EFAULT; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
8d1e977d LP |
411 | static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status, |
412 | u32 retries_max) | |
413 | { | |
414 | int err; | |
415 | u32 retry_count = 0; | |
416 | ||
417 | if (!status || !retries_max) | |
418 | return -EINVAL; | |
419 | ||
420 | do { | |
2185bc2c | 421 | err = __mmc_send_status(card, status, 5); |
8d1e977d LP |
422 | if (err) |
423 | break; | |
424 | ||
425 | if (!R1_STATUS(*status) && | |
426 | (R1_CURRENT_STATE(*status) != R1_STATE_PRG)) | |
427 | break; /* RPMB programming operation complete */ | |
428 | ||
429 | /* | |
430 | * Rechedule to give the MMC device a chance to continue | |
431 | * processing the previous command without being polled too | |
432 | * frequently. | |
433 | */ | |
434 | usleep_range(1000, 5000); | |
435 | } while (++retry_count < retries_max); | |
436 | ||
437 | if (retry_count == retries_max) | |
438 | err = -EPERM; | |
439 | ||
440 | return err; | |
441 | } | |
442 | ||
775a9362 ME |
443 | static int ioctl_do_sanitize(struct mmc_card *card) |
444 | { | |
445 | int err; | |
446 | ||
a2d1086d | 447 | if (!mmc_can_sanitize(card)) { |
775a9362 ME |
448 | pr_warn("%s: %s - SANITIZE is not supported\n", |
449 | mmc_hostname(card->host), __func__); | |
450 | err = -EOPNOTSUPP; | |
451 | goto out; | |
452 | } | |
453 | ||
454 | pr_debug("%s: %s - SANITIZE IN PROGRESS...\n", | |
455 | mmc_hostname(card->host), __func__); | |
456 | ||
457 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
458 | EXT_CSD_SANITIZE_START, 1, | |
459 | MMC_SANITIZE_REQ_TIMEOUT); | |
460 | ||
461 | if (err) | |
462 | pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n", | |
463 | mmc_hostname(card->host), __func__, err); | |
464 | ||
465 | pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host), | |
466 | __func__); | |
467 | out: | |
468 | return err; | |
469 | } | |
470 | ||
a5f5774c JH |
471 | static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, |
472 | struct mmc_blk_ioc_data *idata) | |
cb87ea28 | 473 | { |
a44f7cb9 | 474 | struct mmc_command cmd = {}, sbc = {}; |
c7836d15 MY |
475 | struct mmc_data data = {}; |
476 | struct mmc_request mrq = {}; | |
cb87ea28 JC |
477 | struct scatterlist sg; |
478 | int err; | |
97548575 | 479 | unsigned int target_part; |
8d1e977d | 480 | u32 status = 0; |
cb87ea28 | 481 | |
a5f5774c JH |
482 | if (!card || !md || !idata) |
483 | return -EINVAL; | |
cb87ea28 | 484 | |
97548575 LW |
485 | /* |
486 | * The RPMB accesses comes in from the character device, so we | |
487 | * need to target these explicitly. Else we just target the | |
488 | * partition type for the block device the ioctl() was issued | |
489 | * on. | |
490 | */ | |
491 | if (idata->rpmb) { | |
492 | /* Support multiple RPMB partitions */ | |
493 | target_part = idata->rpmb->part_index; | |
494 | target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB; | |
495 | } else { | |
496 | target_part = md->part_type; | |
497 | } | |
8d1e977d | 498 | |
4d6144de JR |
499 | cmd.opcode = idata->ic.opcode; |
500 | cmd.arg = idata->ic.arg; | |
501 | cmd.flags = idata->ic.flags; | |
502 | ||
503 | if (idata->buf_bytes) { | |
504 | data.sg = &sg; | |
505 | data.sg_len = 1; | |
506 | data.blksz = idata->ic.blksz; | |
507 | data.blocks = idata->ic.blocks; | |
508 | ||
509 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
510 | ||
511 | if (idata->ic.write_flag) | |
512 | data.flags = MMC_DATA_WRITE; | |
513 | else | |
514 | data.flags = MMC_DATA_READ; | |
515 | ||
516 | /* data.flags must already be set before doing this. */ | |
517 | mmc_set_data_timeout(&data, card); | |
518 | ||
519 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
520 | if (idata->ic.data_timeout_ns) | |
521 | data.timeout_ns = idata->ic.data_timeout_ns; | |
522 | ||
523 | if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { | |
524 | /* | |
525 | * Pretend this is a data transfer and rely on the | |
526 | * host driver to compute timeout. When all host | |
527 | * drivers support cmd.cmd_timeout for R1B, this | |
528 | * can be changed to: | |
529 | * | |
530 | * mrq.data = NULL; | |
531 | * cmd.cmd_timeout = idata->ic.cmd_timeout_ms; | |
532 | */ | |
533 | data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000; | |
534 | } | |
535 | ||
536 | mrq.data = &data; | |
537 | } | |
538 | ||
539 | mrq.cmd = &cmd; | |
540 | ||
97548575 | 541 | err = mmc_blk_part_switch(card, target_part); |
8d1e977d | 542 | if (err) |
a5f5774c | 543 | return err; |
8d1e977d | 544 | |
cb87ea28 JC |
545 | if (idata->ic.is_acmd) { |
546 | err = mmc_app_cmd(card->host, card); | |
547 | if (err) | |
a5f5774c | 548 | return err; |
cb87ea28 JC |
549 | } |
550 | ||
97548575 | 551 | if (idata->rpmb) { |
a44f7cb9 WS |
552 | sbc.opcode = MMC_SET_BLOCK_COUNT; |
553 | /* | |
554 | * We don't do any blockcount validation because the max size | |
555 | * may be increased by a future standard. We just copy the | |
556 | * 'Reliable Write' bit here. | |
557 | */ | |
558 | sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31)); | |
559 | sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
560 | mrq.sbc = &sbc; | |
8d1e977d LP |
561 | } |
562 | ||
a82e484e YG |
563 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) && |
564 | (cmd.opcode == MMC_SWITCH)) { | |
775a9362 ME |
565 | err = ioctl_do_sanitize(card); |
566 | ||
567 | if (err) | |
568 | pr_err("%s: ioctl_do_sanitize() failed. err = %d", | |
569 | __func__, err); | |
570 | ||
a5f5774c | 571 | return err; |
775a9362 ME |
572 | } |
573 | ||
cb87ea28 JC |
574 | mmc_wait_for_req(card->host, &mrq); |
575 | ||
576 | if (cmd.error) { | |
577 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
578 | __func__, cmd.error); | |
a5f5774c | 579 | return cmd.error; |
cb87ea28 JC |
580 | } |
581 | if (data.error) { | |
582 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
583 | __func__, data.error); | |
a5f5774c | 584 | return data.error; |
cb87ea28 JC |
585 | } |
586 | ||
a0e95766 BS |
587 | /* |
588 | * Make sure the cache of the PARTITION_CONFIG register and | |
589 | * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write | |
590 | * changed it successfully. | |
591 | */ | |
592 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) && | |
593 | (cmd.opcode == MMC_SWITCH)) { | |
594 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); | |
595 | u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg); | |
596 | ||
597 | /* | |
598 | * Update cache so the next mmc_blk_part_switch call operates | |
599 | * on up-to-date data. | |
600 | */ | |
601 | card->ext_csd.part_config = value; | |
602 | main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK; | |
603 | } | |
604 | ||
cb87ea28 JC |
605 | /* |
606 | * According to the SD specs, some commands require a delay after | |
607 | * issuing the command. | |
608 | */ | |
609 | if (idata->ic.postsleep_min_us) | |
610 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
611 | ||
a5f5774c | 612 | memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp)); |
cb87ea28 | 613 | |
97548575 | 614 | if (idata->rpmb) { |
8d1e977d LP |
615 | /* |
616 | * Ensure RPMB command has completed by polling CMD13 | |
617 | * "Send Status". | |
618 | */ | |
619 | err = ioctl_rpmb_card_status_poll(card, &status, 5); | |
620 | if (err) | |
621 | dev_err(mmc_dev(card->host), | |
622 | "%s: Card Status=0x%08X, error %d\n", | |
623 | __func__, status, err); | |
624 | } | |
625 | ||
a5f5774c JH |
626 | return err; |
627 | } | |
628 | ||
2fe20bae | 629 | static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md, |
97548575 LW |
630 | struct mmc_ioc_cmd __user *ic_ptr, |
631 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
632 | { |
633 | struct mmc_blk_ioc_data *idata; | |
3ecd8cf2 | 634 | struct mmc_blk_ioc_data *idatas[1]; |
614f0388 | 635 | struct mmc_queue *mq; |
a5f5774c | 636 | struct mmc_card *card; |
b093410c | 637 | int err = 0, ioc_err = 0; |
614f0388 | 638 | struct request *req; |
a5f5774c JH |
639 | |
640 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); | |
641 | if (IS_ERR(idata)) | |
642 | return PTR_ERR(idata); | |
97548575 LW |
643 | /* This will be NULL on non-RPMB ioctl():s */ |
644 | idata->rpmb = rpmb; | |
a5f5774c | 645 | |
a5f5774c JH |
646 | card = md->queue.card; |
647 | if (IS_ERR(card)) { | |
648 | err = PTR_ERR(card); | |
649 | goto cmd_done; | |
650 | } | |
651 | ||
614f0388 LW |
652 | /* |
653 | * Dispatch the ioctl() into the block request queue. | |
654 | */ | |
655 | mq = &md->queue; | |
656 | req = blk_get_request(mq->queue, | |
ff005a06 | 657 | idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
658 | if (IS_ERR(req)) { |
659 | err = PTR_ERR(req); | |
660 | goto cmd_done; | |
661 | } | |
3ecd8cf2 | 662 | idatas[0] = idata; |
97548575 LW |
663 | req_to_mmc_queue_req(req)->drv_op = |
664 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 665 | req_to_mmc_queue_req(req)->drv_op_data = idatas; |
3ecd8cf2 | 666 | req_to_mmc_queue_req(req)->ioc_count = 1; |
614f0388 | 667 | blk_execute_rq(mq->queue, NULL, req, 0); |
0493f6fe | 668 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
b093410c | 669 | err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata); |
614f0388 | 670 | blk_put_request(req); |
a5f5774c | 671 | |
cb87ea28 | 672 | cmd_done: |
cb87ea28 JC |
673 | kfree(idata->buf); |
674 | kfree(idata); | |
b093410c | 675 | return ioc_err ? ioc_err : err; |
cb87ea28 JC |
676 | } |
677 | ||
2fe20bae | 678 | static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md, |
97548575 LW |
679 | struct mmc_ioc_multi_cmd __user *user, |
680 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
681 | { |
682 | struct mmc_blk_ioc_data **idata = NULL; | |
683 | struct mmc_ioc_cmd __user *cmds = user->cmds; | |
684 | struct mmc_card *card; | |
3ecd8cf2 | 685 | struct mmc_queue *mq; |
b093410c | 686 | int i, err = 0, ioc_err = 0; |
a5f5774c | 687 | __u64 num_of_cmds; |
3ecd8cf2 | 688 | struct request *req; |
a5f5774c JH |
689 | |
690 | if (copy_from_user(&num_of_cmds, &user->num_of_cmds, | |
691 | sizeof(num_of_cmds))) | |
692 | return -EFAULT; | |
693 | ||
aab2ee03 GU |
694 | if (!num_of_cmds) |
695 | return 0; | |
696 | ||
a5f5774c JH |
697 | if (num_of_cmds > MMC_IOC_MAX_CMDS) |
698 | return -EINVAL; | |
699 | ||
700 | idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL); | |
701 | if (!idata) | |
702 | return -ENOMEM; | |
703 | ||
704 | for (i = 0; i < num_of_cmds; i++) { | |
705 | idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]); | |
706 | if (IS_ERR(idata[i])) { | |
707 | err = PTR_ERR(idata[i]); | |
708 | num_of_cmds = i; | |
709 | goto cmd_err; | |
710 | } | |
97548575 LW |
711 | /* This will be NULL on non-RPMB ioctl():s */ |
712 | idata[i]->rpmb = rpmb; | |
a5f5774c JH |
713 | } |
714 | ||
a5f5774c JH |
715 | card = md->queue.card; |
716 | if (IS_ERR(card)) { | |
717 | err = PTR_ERR(card); | |
2fe20bae | 718 | goto cmd_err; |
a5f5774c JH |
719 | } |
720 | ||
a5f5774c | 721 | |
3ecd8cf2 LW |
722 | /* |
723 | * Dispatch the ioctl()s into the block request queue. | |
724 | */ | |
725 | mq = &md->queue; | |
726 | req = blk_get_request(mq->queue, | |
ff005a06 | 727 | idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
728 | if (IS_ERR(req)) { |
729 | err = PTR_ERR(req); | |
730 | goto cmd_err; | |
731 | } | |
97548575 LW |
732 | req_to_mmc_queue_req(req)->drv_op = |
733 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 734 | req_to_mmc_queue_req(req)->drv_op_data = idata; |
3ecd8cf2 LW |
735 | req_to_mmc_queue_req(req)->ioc_count = num_of_cmds; |
736 | blk_execute_rq(mq->queue, NULL, req, 0); | |
0493f6fe | 737 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
a5f5774c JH |
738 | |
739 | /* copy to user if data and response */ | |
b093410c | 740 | for (i = 0; i < num_of_cmds && !err; i++) |
a5f5774c | 741 | err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]); |
a5f5774c | 742 | |
3ecd8cf2 LW |
743 | blk_put_request(req); |
744 | ||
a5f5774c JH |
745 | cmd_err: |
746 | for (i = 0; i < num_of_cmds; i++) { | |
747 | kfree(idata[i]->buf); | |
748 | kfree(idata[i]); | |
749 | } | |
750 | kfree(idata); | |
b093410c | 751 | return ioc_err ? ioc_err : err; |
a5f5774c JH |
752 | } |
753 | ||
61fe0e2b LW |
754 | static int mmc_blk_check_blkdev(struct block_device *bdev) |
755 | { | |
756 | /* | |
757 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
758 | * whole block device, not on a partition. This prevents overspray | |
759 | * between sibling partitions. | |
760 | */ | |
761 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
762 | return -EPERM; | |
763 | return 0; | |
764 | } | |
765 | ||
cb87ea28 JC |
766 | static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, |
767 | unsigned int cmd, unsigned long arg) | |
768 | { | |
2fe20bae | 769 | struct mmc_blk_data *md; |
61fe0e2b LW |
770 | int ret; |
771 | ||
a5f5774c JH |
772 | switch (cmd) { |
773 | case MMC_IOC_CMD: | |
61fe0e2b LW |
774 | ret = mmc_blk_check_blkdev(bdev); |
775 | if (ret) | |
776 | return ret; | |
2fe20bae LW |
777 | md = mmc_blk_get(bdev->bd_disk); |
778 | if (!md) | |
779 | return -EINVAL; | |
780 | ret = mmc_blk_ioctl_cmd(md, | |
97548575 LW |
781 | (struct mmc_ioc_cmd __user *)arg, |
782 | NULL); | |
2fe20bae LW |
783 | mmc_blk_put(md); |
784 | return ret; | |
a5f5774c | 785 | case MMC_IOC_MULTI_CMD: |
61fe0e2b LW |
786 | ret = mmc_blk_check_blkdev(bdev); |
787 | if (ret) | |
788 | return ret; | |
2fe20bae LW |
789 | md = mmc_blk_get(bdev->bd_disk); |
790 | if (!md) | |
791 | return -EINVAL; | |
792 | ret = mmc_blk_ioctl_multi_cmd(md, | |
97548575 LW |
793 | (struct mmc_ioc_multi_cmd __user *)arg, |
794 | NULL); | |
2fe20bae LW |
795 | mmc_blk_put(md); |
796 | return ret; | |
a5f5774c JH |
797 | default: |
798 | return -EINVAL; | |
799 | } | |
cb87ea28 JC |
800 | } |
801 | ||
802 | #ifdef CONFIG_COMPAT | |
803 | static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
804 | unsigned int cmd, unsigned long arg) | |
805 | { | |
806 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
807 | } | |
808 | #endif | |
809 | ||
83d5cde4 | 810 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
811 | .open = mmc_blk_open, |
812 | .release = mmc_blk_release, | |
a885c8c4 | 813 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 814 | .owner = THIS_MODULE, |
cb87ea28 JC |
815 | .ioctl = mmc_blk_ioctl, |
816 | #ifdef CONFIG_COMPAT | |
817 | .compat_ioctl = mmc_blk_compat_ioctl, | |
818 | #endif | |
1da177e4 LT |
819 | }; |
820 | ||
025e3d5f AH |
821 | static int mmc_blk_part_switch_pre(struct mmc_card *card, |
822 | unsigned int part_type) | |
823 | { | |
824 | int ret = 0; | |
825 | ||
826 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
827 | if (card->ext_csd.cmdq_en) { | |
828 | ret = mmc_cmdq_disable(card); | |
829 | if (ret) | |
830 | return ret; | |
831 | } | |
832 | mmc_retune_pause(card->host); | |
833 | } | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
838 | static int mmc_blk_part_switch_post(struct mmc_card *card, | |
839 | unsigned int part_type) | |
840 | { | |
841 | int ret = 0; | |
842 | ||
843 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
844 | mmc_retune_unpause(card->host); | |
845 | if (card->reenable_cmdq && !card->ext_csd.cmdq_en) | |
846 | ret = mmc_cmdq_enable(card); | |
847 | } | |
848 | ||
849 | return ret; | |
850 | } | |
851 | ||
371a689f | 852 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 853 | unsigned int part_type) |
371a689f | 854 | { |
025e3d5f | 855 | int ret = 0; |
fc95e30b | 856 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); |
0d7d85ca | 857 | |
1f797edc | 858 | if (main_md->part_curr == part_type) |
371a689f AW |
859 | return 0; |
860 | ||
861 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
862 | u8 part_config = card->ext_csd.part_config; |
863 | ||
1f797edc | 864 | ret = mmc_blk_part_switch_pre(card, part_type); |
025e3d5f AH |
865 | if (ret) |
866 | return ret; | |
57da0c04 | 867 | |
0d7d85ca | 868 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
1f797edc | 869 | part_config |= part_type; |
371a689f AW |
870 | |
871 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 872 | EXT_CSD_PART_CONFIG, part_config, |
371a689f | 873 | card->ext_csd.part_time); |
57da0c04 | 874 | if (ret) { |
1f797edc | 875 | mmc_blk_part_switch_post(card, part_type); |
371a689f | 876 | return ret; |
57da0c04 | 877 | } |
0d7d85ca AH |
878 | |
879 | card->ext_csd.part_config = part_config; | |
57da0c04 | 880 | |
025e3d5f | 881 | ret = mmc_blk_part_switch_post(card, main_md->part_curr); |
67716327 | 882 | } |
371a689f | 883 | |
1f797edc | 884 | main_md->part_curr = part_type; |
025e3d5f | 885 | return ret; |
371a689f AW |
886 | } |
887 | ||
169f03a0 | 888 | static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) |
ec5a19dd PO |
889 | { |
890 | int err; | |
051913da BD |
891 | u32 result; |
892 | __be32 *blocks; | |
ec5a19dd | 893 | |
c7836d15 MY |
894 | struct mmc_request mrq = {}; |
895 | struct mmc_command cmd = {}; | |
896 | struct mmc_data data = {}; | |
ec5a19dd PO |
897 | |
898 | struct scatterlist sg; | |
899 | ||
ec5a19dd PO |
900 | cmd.opcode = MMC_APP_CMD; |
901 | cmd.arg = card->rca << 16; | |
7213d175 | 902 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
903 | |
904 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 | 905 | if (err) |
169f03a0 | 906 | return err; |
7213d175 | 907 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) |
169f03a0 | 908 | return -EIO; |
ec5a19dd PO |
909 | |
910 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
911 | ||
912 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
913 | cmd.arg = 0; | |
7213d175 | 914 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 915 | |
ec5a19dd PO |
916 | data.blksz = 4; |
917 | data.blocks = 1; | |
918 | data.flags = MMC_DATA_READ; | |
919 | data.sg = &sg; | |
920 | data.sg_len = 1; | |
d380443c | 921 | mmc_set_data_timeout(&data, card); |
ec5a19dd | 922 | |
ec5a19dd PO |
923 | mrq.cmd = &cmd; |
924 | mrq.data = &data; | |
925 | ||
051913da BD |
926 | blocks = kmalloc(4, GFP_KERNEL); |
927 | if (!blocks) | |
169f03a0 | 928 | return -ENOMEM; |
051913da BD |
929 | |
930 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
931 | |
932 | mmc_wait_for_req(card->host, &mrq); | |
933 | ||
051913da BD |
934 | result = ntohl(*blocks); |
935 | kfree(blocks); | |
936 | ||
17b0429d | 937 | if (cmd.error || data.error) |
169f03a0 LW |
938 | return -EIO; |
939 | ||
940 | *written_blocks = result; | |
ec5a19dd | 941 | |
169f03a0 | 942 | return 0; |
ec5a19dd PO |
943 | } |
944 | ||
92c0a0cc AH |
945 | static unsigned int mmc_blk_clock_khz(struct mmc_host *host) |
946 | { | |
947 | if (host->actual_clock) | |
948 | return host->actual_clock / 1000; | |
949 | ||
950 | /* Clock may be subject to a divisor, fudge it by a factor of 2. */ | |
951 | if (host->ios.clock) | |
952 | return host->ios.clock / 2000; | |
953 | ||
954 | /* How can there be no clock */ | |
955 | WARN_ON_ONCE(1); | |
956 | return 100; /* 100 kHz is minimum possible value */ | |
957 | } | |
958 | ||
959 | static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host, | |
960 | struct mmc_data *data) | |
961 | { | |
962 | unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); | |
963 | unsigned int khz; | |
964 | ||
965 | if (data->timeout_clks) { | |
966 | khz = mmc_blk_clock_khz(host); | |
967 | ms += DIV_ROUND_UP(data->timeout_clks, khz); | |
968 | } | |
969 | ||
970 | return ms; | |
971 | } | |
972 | ||
0987c6b0 AH |
973 | static inline bool mmc_blk_in_tran_state(u32 status) |
974 | { | |
975 | /* | |
976 | * Some cards mishandle the status bits, so make sure to check both the | |
977 | * busy indication and the card state. | |
978 | */ | |
979 | return status & R1_READY_FOR_DATA && | |
980 | (R1_CURRENT_STATE(status) == R1_STATE_TRAN); | |
981 | } | |
982 | ||
c49433fb | 983 | static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, |
0fbfd125 | 984 | struct request *req, u32 *resp_errs) |
c49433fb UH |
985 | { |
986 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); | |
987 | int err = 0; | |
988 | u32 status; | |
989 | ||
990 | do { | |
7701885e AH |
991 | bool done = time_after(jiffies, timeout); |
992 | ||
2185bc2c | 993 | err = __mmc_send_status(card, &status, 5); |
c49433fb UH |
994 | if (err) { |
995 | pr_err("%s: error %d requesting status\n", | |
996 | req->rq_disk->disk_name, err); | |
997 | return err; | |
998 | } | |
999 | ||
c89b4851 AH |
1000 | /* Accumulate any response error bits seen */ |
1001 | if (resp_errs) | |
1002 | *resp_errs |= status; | |
c49433fb UH |
1003 | |
1004 | /* | |
1005 | * Timeout if the device never becomes ready for data and never | |
1006 | * leaves the program state. | |
1007 | */ | |
7701885e | 1008 | if (done) { |
0987c6b0 | 1009 | pr_err("%s: Card stuck in wrong state! %s %s status: %#x\n", |
c49433fb | 1010 | mmc_hostname(card->host), |
0987c6b0 | 1011 | req->rq_disk->disk_name, __func__, status); |
c49433fb UH |
1012 | return -ETIMEDOUT; |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * Some cards mishandle the status bits, | |
1017 | * so make sure to check both the busy | |
1018 | * indication and the card state. | |
1019 | */ | |
0987c6b0 | 1020 | } while (!mmc_blk_in_tran_state(status)); |
c49433fb UH |
1021 | |
1022 | return err; | |
1023 | } | |
1024 | ||
67716327 AH |
1025 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
1026 | int type) | |
1027 | { | |
1028 | int err; | |
1029 | ||
1030 | if (md->reset_done & type) | |
1031 | return -EEXIST; | |
1032 | ||
1033 | md->reset_done |= type; | |
1034 | err = mmc_hw_reset(host); | |
1035 | /* Ensure we switch back to the correct partition */ | |
1036 | if (err != -EOPNOTSUPP) { | |
fc95e30b UH |
1037 | struct mmc_blk_data *main_md = |
1038 | dev_get_drvdata(&host->card->dev); | |
67716327 AH |
1039 | int part_err; |
1040 | ||
1041 | main_md->part_curr = main_md->part_type; | |
1f797edc | 1042 | part_err = mmc_blk_part_switch(host->card, md->part_type); |
67716327 AH |
1043 | if (part_err) { |
1044 | /* | |
1045 | * We have failed to get back into the correct | |
1046 | * partition, so we need to abort the whole request. | |
1047 | */ | |
1048 | return -ENODEV; | |
1049 | } | |
1050 | } | |
1051 | return err; | |
1052 | } | |
1053 | ||
1054 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
1055 | { | |
1056 | md->reset_done &= ~type; | |
1057 | } | |
1058 | ||
5ec12396 LW |
1059 | /* |
1060 | * The non-block commands come back from the block layer after it queued it and | |
1061 | * processed it with all other requests and then they get issued in this | |
1062 | * function. | |
1063 | */ | |
1064 | static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) | |
1065 | { | |
1066 | struct mmc_queue_req *mq_rq; | |
1067 | struct mmc_card *card = mq->card; | |
1068 | struct mmc_blk_data *md = mq->blkdata; | |
69f7599e | 1069 | struct mmc_blk_ioc_data **idata; |
97548575 | 1070 | bool rpmb_ioctl; |
627c3ccf LW |
1071 | u8 **ext_csd; |
1072 | u32 status; | |
0493f6fe | 1073 | int ret; |
5ec12396 LW |
1074 | int i; |
1075 | ||
1076 | mq_rq = req_to_mmc_queue_req(req); | |
97548575 | 1077 | rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB); |
5ec12396 LW |
1078 | |
1079 | switch (mq_rq->drv_op) { | |
1080 | case MMC_DRV_OP_IOCTL: | |
97548575 | 1081 | case MMC_DRV_OP_IOCTL_RPMB: |
69f7599e | 1082 | idata = mq_rq->drv_op_data; |
7432b49b | 1083 | for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) { |
69f7599e | 1084 | ret = __mmc_blk_ioctl_cmd(card, md, idata[i]); |
0493f6fe | 1085 | if (ret) |
5ec12396 LW |
1086 | break; |
1087 | } | |
5ec12396 | 1088 | /* Always switch back to main area after RPMB access */ |
97548575 LW |
1089 | if (rpmb_ioctl) |
1090 | mmc_blk_part_switch(card, 0); | |
0493f6fe LW |
1091 | break; |
1092 | case MMC_DRV_OP_BOOT_WP: | |
1093 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, | |
1094 | card->ext_csd.boot_ro_lock | | |
1095 | EXT_CSD_BOOT_WP_B_PWR_WP_EN, | |
1096 | card->ext_csd.part_time); | |
1097 | if (ret) | |
1098 | pr_err("%s: Locking boot partition ro until next power on failed: %d\n", | |
1099 | md->disk->disk_name, ret); | |
1100 | else | |
1101 | card->ext_csd.boot_ro_lock |= | |
1102 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; | |
5ec12396 | 1103 | break; |
627c3ccf LW |
1104 | case MMC_DRV_OP_GET_CARD_STATUS: |
1105 | ret = mmc_send_status(card, &status); | |
1106 | if (!ret) | |
1107 | ret = status; | |
1108 | break; | |
1109 | case MMC_DRV_OP_GET_EXT_CSD: | |
1110 | ext_csd = mq_rq->drv_op_data; | |
1111 | ret = mmc_get_ext_csd(card, ext_csd); | |
1112 | break; | |
5ec12396 | 1113 | default: |
0493f6fe LW |
1114 | pr_err("%s: unknown driver specific operation\n", |
1115 | md->disk->disk_name); | |
1116 | ret = -EINVAL; | |
5ec12396 LW |
1117 | break; |
1118 | } | |
0493f6fe | 1119 | mq_rq->drv_op_result = ret; |
0fbfd125 | 1120 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
5ec12396 LW |
1121 | } |
1122 | ||
df061588 | 1123 | static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
bd788c96 | 1124 | { |
7db3028e | 1125 | struct mmc_blk_data *md = mq->blkdata; |
bd788c96 AH |
1126 | struct mmc_card *card = md->queue.card; |
1127 | unsigned int from, nr, arg; | |
67716327 | 1128 | int err = 0, type = MMC_BLK_DISCARD; |
2a842aca | 1129 | blk_status_t status = BLK_STS_OK; |
bd788c96 | 1130 | |
bd788c96 | 1131 | if (!mmc_can_erase(card)) { |
2a842aca | 1132 | status = BLK_STS_NOTSUPP; |
8cb6ed17 | 1133 | goto fail; |
bd788c96 AH |
1134 | } |
1135 | ||
1136 | from = blk_rq_pos(req); | |
1137 | nr = blk_rq_sectors(req); | |
1138 | ||
b3bf9153 KP |
1139 | if (mmc_can_discard(card)) |
1140 | arg = MMC_DISCARD_ARG; | |
1141 | else if (mmc_can_trim(card)) | |
bd788c96 AH |
1142 | arg = MMC_TRIM_ARG; |
1143 | else | |
1144 | arg = MMC_ERASE_ARG; | |
164b50b3 GU |
1145 | do { |
1146 | err = 0; | |
1147 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
1148 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1149 | INAND_CMD38_ARG_EXT_CSD, | |
1150 | arg == MMC_TRIM_ARG ? | |
1151 | INAND_CMD38_ARG_TRIM : | |
1152 | INAND_CMD38_ARG_ERASE, | |
1153 | 0); | |
1154 | } | |
1155 | if (!err) | |
1156 | err = mmc_erase(card, from, nr, arg); | |
1157 | } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); | |
2a842aca CH |
1158 | if (err) |
1159 | status = BLK_STS_IOERR; | |
1160 | else | |
67716327 | 1161 | mmc_blk_reset_success(md, type); |
8cb6ed17 | 1162 | fail: |
0fbfd125 | 1163 | blk_mq_end_request(req, status); |
bd788c96 AH |
1164 | } |
1165 | ||
df061588 | 1166 | static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
49804548 AH |
1167 | struct request *req) |
1168 | { | |
7db3028e | 1169 | struct mmc_blk_data *md = mq->blkdata; |
49804548 | 1170 | struct mmc_card *card = md->queue.card; |
775a9362 | 1171 | unsigned int from, nr, arg; |
67716327 | 1172 | int err = 0, type = MMC_BLK_SECDISCARD; |
2a842aca | 1173 | blk_status_t status = BLK_STS_OK; |
49804548 | 1174 | |
775a9362 | 1175 | if (!(mmc_can_secure_erase_trim(card))) { |
2a842aca | 1176 | status = BLK_STS_NOTSUPP; |
49804548 AH |
1177 | goto out; |
1178 | } | |
1179 | ||
28302812 AH |
1180 | from = blk_rq_pos(req); |
1181 | nr = blk_rq_sectors(req); | |
1182 | ||
775a9362 ME |
1183 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) |
1184 | arg = MMC_SECURE_TRIM1_ARG; | |
1185 | else | |
1186 | arg = MMC_SECURE_ERASE_ARG; | |
d9ddd629 | 1187 | |
67716327 | 1188 | retry: |
6a7a6b45 AW |
1189 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1190 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1191 | INAND_CMD38_ARG_EXT_CSD, | |
1192 | arg == MMC_SECURE_TRIM1_ARG ? | |
1193 | INAND_CMD38_ARG_SECTRIM1 : | |
1194 | INAND_CMD38_ARG_SECERASE, | |
1195 | 0); | |
1196 | if (err) | |
28302812 | 1197 | goto out_retry; |
6a7a6b45 | 1198 | } |
28302812 | 1199 | |
49804548 | 1200 | err = mmc_erase(card, from, nr, arg); |
28302812 AH |
1201 | if (err == -EIO) |
1202 | goto out_retry; | |
2a842aca CH |
1203 | if (err) { |
1204 | status = BLK_STS_IOERR; | |
28302812 | 1205 | goto out; |
2a842aca | 1206 | } |
28302812 AH |
1207 | |
1208 | if (arg == MMC_SECURE_TRIM1_ARG) { | |
6a7a6b45 AW |
1209 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1210 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1211 | INAND_CMD38_ARG_EXT_CSD, | |
1212 | INAND_CMD38_ARG_SECTRIM2, | |
1213 | 0); | |
1214 | if (err) | |
28302812 | 1215 | goto out_retry; |
6a7a6b45 | 1216 | } |
28302812 | 1217 | |
49804548 | 1218 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
28302812 AH |
1219 | if (err == -EIO) |
1220 | goto out_retry; | |
2a842aca CH |
1221 | if (err) { |
1222 | status = BLK_STS_IOERR; | |
28302812 | 1223 | goto out; |
2a842aca | 1224 | } |
6a7a6b45 | 1225 | } |
28302812 | 1226 | |
28302812 AH |
1227 | out_retry: |
1228 | if (err && !mmc_blk_reset(md, card->host, type)) | |
67716327 AH |
1229 | goto retry; |
1230 | if (!err) | |
1231 | mmc_blk_reset_success(md, type); | |
28302812 | 1232 | out: |
0fbfd125 | 1233 | blk_mq_end_request(req, status); |
49804548 AH |
1234 | } |
1235 | ||
df061588 | 1236 | static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
f4c5522b | 1237 | { |
7db3028e | 1238 | struct mmc_blk_data *md = mq->blkdata; |
881d1c25 SJ |
1239 | struct mmc_card *card = md->queue.card; |
1240 | int ret = 0; | |
1241 | ||
1242 | ret = mmc_flush_cache(card); | |
0fbfd125 | 1243 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
f4c5522b AW |
1244 | } |
1245 | ||
1246 | /* | |
1247 | * Reformat current write as a reliable write, supporting | |
1248 | * both legacy and the enhanced reliable write MMC cards. | |
1249 | * In each transfer we'll handle only as much as a single | |
1250 | * reliable write can handle, thus finish the request in | |
1251 | * partial completions. | |
1252 | */ | |
d0c97cfb AW |
1253 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
1254 | struct mmc_card *card, | |
1255 | struct request *req) | |
f4c5522b | 1256 | { |
f4c5522b AW |
1257 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
1258 | /* Legacy mode imposes restrictions on transfers. */ | |
9cb38f7a | 1259 | if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors)) |
f4c5522b AW |
1260 | brq->data.blocks = 1; |
1261 | ||
1262 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
1263 | brq->data.blocks = card->ext_csd.rel_sectors; | |
1264 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
1265 | brq->data.blocks = 1; | |
1266 | } | |
f4c5522b AW |
1267 | } |
1268 | ||
f47a1fe3 AH |
1269 | #define CMD_ERRORS_EXCL_OOR \ |
1270 | (R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
4c2b8f26 RKAL |
1271 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ |
1272 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
a04e6bae | 1273 | R1_CARD_ECC_FAILED | /* Card ECC failed */ \ |
4c2b8f26 RKAL |
1274 | R1_CC_ERROR | /* Card controller error */ \ |
1275 | R1_ERROR) /* General/unknown error */ | |
1276 | ||
f47a1fe3 AH |
1277 | #define CMD_ERRORS \ |
1278 | (CMD_ERRORS_EXCL_OOR | \ | |
1279 | R1_OUT_OF_RANGE) /* Command argument out of range */ \ | |
1280 | ||
d83c2dba | 1281 | static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) |
a04e6bae | 1282 | { |
d83c2dba | 1283 | u32 val; |
a04e6bae | 1284 | |
d83c2dba SL |
1285 | /* |
1286 | * Per the SD specification(physical layer version 4.10)[1], | |
1287 | * section 4.3.3, it explicitly states that "When the last | |
1288 | * block of user area is read using CMD18, the host should | |
1289 | * ignore OUT_OF_RANGE error that may occur even the sequence | |
1290 | * is correct". And JESD84-B51 for eMMC also has a similar | |
1291 | * statement on section 6.8.3. | |
1292 | * | |
1293 | * Multiple block read/write could be done by either predefined | |
1294 | * method, namely CMD23, or open-ending mode. For open-ending mode, | |
1295 | * we should ignore the OUT_OF_RANGE error as it's normal behaviour. | |
1296 | * | |
1297 | * However the spec[1] doesn't tell us whether we should also | |
1298 | * ignore that for predefined method. But per the spec[1], section | |
1299 | * 4.15 Set Block Count Command, it says"If illegal block count | |
1300 | * is set, out of range error will be indicated during read/write | |
1301 | * operation (For example, data transfer is stopped at user area | |
1302 | * boundary)." In another word, we could expect a out of range error | |
1303 | * in the response for the following CMD18/25. And if argument of | |
1304 | * CMD23 + the argument of CMD18/25 exceed the max number of blocks, | |
1305 | * we could also expect to get a -ETIMEDOUT or any error number from | |
1306 | * the host drivers due to missing data response(for write)/data(for | |
1307 | * read), as the cards will stop the data transfer by itself per the | |
1308 | * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode. | |
1309 | */ | |
1310 | ||
1311 | if (!brq->stop.error) { | |
1312 | bool oor_with_open_end; | |
1313 | /* If there is no error yet, check R1 response */ | |
1314 | ||
1315 | val = brq->stop.resp[0] & CMD_ERRORS; | |
1316 | oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc; | |
1317 | ||
1318 | if (val && !oor_with_open_end) | |
1319 | brq->stop.error = -EIO; | |
1320 | } | |
a04e6bae WS |
1321 | } |
1322 | ||
ca5717f7 | 1323 | static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, |
d3377c01 AH |
1324 | int disable_multi, bool *do_rel_wr_p, |
1325 | bool *do_data_tag_p) | |
1da177e4 | 1326 | { |
ca5717f7 AH |
1327 | struct mmc_blk_data *md = mq->blkdata; |
1328 | struct mmc_card *card = md->queue.card; | |
54d49d77 | 1329 | struct mmc_blk_request *brq = &mqrq->brq; |
67e69d52 | 1330 | struct request *req = mmc_queue_req_to_req(mqrq); |
d3377c01 | 1331 | bool do_rel_wr, do_data_tag; |
1da177e4 | 1332 | |
f4c5522b AW |
1333 | /* |
1334 | * Reliable writes are used to implement Forced Unit Access and | |
d3df0465 | 1335 | * are supported only on MMCs. |
f4c5522b | 1336 | */ |
d3377c01 AH |
1337 | do_rel_wr = (req->cmd_flags & REQ_FUA) && |
1338 | rq_data_dir(req) == WRITE && | |
1339 | (md->flags & MMC_BLK_REL_WR); | |
f4c5522b | 1340 | |
54d49d77 | 1341 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
ca5717f7 | 1342 | |
54d49d77 | 1343 | brq->mrq.data = &brq->data; |
93482b3d | 1344 | brq->mrq.tag = req->tag; |
1da177e4 | 1345 | |
54d49d77 PF |
1346 | brq->stop.opcode = MMC_STOP_TRANSMISSION; |
1347 | brq->stop.arg = 0; | |
ca5717f7 AH |
1348 | |
1349 | if (rq_data_dir(req) == READ) { | |
1350 | brq->data.flags = MMC_DATA_READ; | |
1351 | brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1352 | } else { | |
1353 | brq->data.flags = MMC_DATA_WRITE; | |
1354 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1355 | } | |
1356 | ||
1357 | brq->data.blksz = 512; | |
54d49d77 | 1358 | brq->data.blocks = blk_rq_sectors(req); |
93482b3d AH |
1359 | brq->data.blk_addr = blk_rq_pos(req); |
1360 | ||
1361 | /* | |
1362 | * The command queue supports 2 priorities: "high" (1) and "simple" (0). | |
1363 | * The eMMC will give "high" priority tasks priority over "simple" | |
1364 | * priority tasks. Here we always set "simple" priority by not setting | |
1365 | * MMC_DATA_PRIO. | |
1366 | */ | |
6a79e391 | 1367 | |
54d49d77 PF |
1368 | /* |
1369 | * The block layer doesn't support all sector count | |
1370 | * restrictions, so we need to be prepared for too big | |
1371 | * requests. | |
1372 | */ | |
1373 | if (brq->data.blocks > card->host->max_blk_count) | |
1374 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1375 | |
2bf22b39 | 1376 | if (brq->data.blocks > 1) { |
41591b38 CB |
1377 | /* |
1378 | * Some SD cards in SPI mode return a CRC error or even lock up | |
1379 | * completely when trying to read the last block using a | |
1380 | * multiblock read command. | |
1381 | */ | |
1382 | if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) && | |
1383 | (blk_rq_pos(req) + blk_rq_sectors(req) == | |
1384 | get_capacity(md->disk))) | |
1385 | brq->data.blocks--; | |
1386 | ||
2bf22b39 PW |
1387 | /* |
1388 | * After a read error, we redo the request one sector | |
1389 | * at a time in order to accurately determine which | |
1390 | * sectors can be read successfully. | |
1391 | */ | |
1392 | if (disable_multi) | |
1393 | brq->data.blocks = 1; | |
1394 | ||
2e47e842 KM |
1395 | /* |
1396 | * Some controllers have HW issues while operating | |
1397 | * in multiple I/O mode | |
1398 | */ | |
1399 | if (card->host->ops->multi_io_quirk) | |
1400 | brq->data.blocks = card->host->ops->multi_io_quirk(card, | |
1401 | (rq_data_dir(req) == READ) ? | |
1402 | MMC_DATA_READ : MMC_DATA_WRITE, | |
1403 | brq->data.blocks); | |
2bf22b39 | 1404 | } |
d0c97cfb | 1405 | |
93482b3d | 1406 | if (do_rel_wr) { |
ca5717f7 | 1407 | mmc_apply_rel_rw(brq, card, req); |
93482b3d AH |
1408 | brq->data.flags |= MMC_DATA_REL_WR; |
1409 | } | |
ca5717f7 AH |
1410 | |
1411 | /* | |
1412 | * Data tag is used only during writing meta data to speed | |
1413 | * up write and any subsequent read of this meta data | |
1414 | */ | |
d3377c01 AH |
1415 | do_data_tag = card->ext_csd.data_tag_unit_size && |
1416 | (req->cmd_flags & REQ_META) && | |
1417 | (rq_data_dir(req) == WRITE) && | |
1418 | ((brq->data.blocks * brq->data.blksz) >= | |
1419 | card->ext_csd.data_tag_unit_size); | |
ca5717f7 | 1420 | |
93482b3d AH |
1421 | if (do_data_tag) |
1422 | brq->data.flags |= MMC_DATA_DAT_TAG; | |
1423 | ||
ca5717f7 AH |
1424 | mmc_set_data_timeout(&brq->data, card); |
1425 | ||
1426 | brq->data.sg = mqrq->sg; | |
1427 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1428 | ||
1429 | /* | |
1430 | * Adjust the sg list so it is the same size as the | |
1431 | * request. | |
1432 | */ | |
1433 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1434 | int i, data_size = brq->data.blocks << 9; | |
1435 | struct scatterlist *sg; | |
1436 | ||
1437 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1438 | data_size -= sg->length; | |
1439 | if (data_size <= 0) { | |
1440 | sg->length += data_size; | |
1441 | i++; | |
1442 | break; | |
1443 | } | |
1444 | } | |
1445 | brq->data.sg_len = i; | |
1446 | } | |
1447 | ||
d3377c01 AH |
1448 | if (do_rel_wr_p) |
1449 | *do_rel_wr_p = do_rel_wr; | |
1450 | ||
1451 | if (do_data_tag_p) | |
1452 | *do_data_tag_p = do_data_tag; | |
ca5717f7 AH |
1453 | } |
1454 | ||
1e8e55b6 AH |
1455 | #define MMC_CQE_RETRIES 2 |
1456 | ||
1457 | static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) | |
1458 | { | |
1459 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1460 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1461 | struct request_queue *q = req->q; | |
1462 | struct mmc_host *host = mq->card->host; | |
1463 | unsigned long flags; | |
1464 | bool put_card; | |
1465 | int err; | |
1466 | ||
1467 | mmc_cqe_post_req(host, mrq); | |
1468 | ||
1469 | if (mrq->cmd && mrq->cmd->error) | |
1470 | err = mrq->cmd->error; | |
1471 | else if (mrq->data && mrq->data->error) | |
1472 | err = mrq->data->error; | |
1473 | else | |
1474 | err = 0; | |
1475 | ||
1476 | if (err) { | |
1477 | if (mqrq->retries++ < MMC_CQE_RETRIES) | |
1478 | blk_mq_requeue_request(req, true); | |
1479 | else | |
1480 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1481 | } else if (mrq->data) { | |
1482 | if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered)) | |
1483 | blk_mq_requeue_request(req, true); | |
1484 | else | |
1485 | __blk_mq_end_request(req, BLK_STS_OK); | |
1486 | } else { | |
1487 | blk_mq_end_request(req, BLK_STS_OK); | |
1488 | } | |
1489 | ||
f5d72c5c | 1490 | spin_lock_irqsave(&mq->lock, flags); |
1e8e55b6 AH |
1491 | |
1492 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
1493 | ||
1494 | put_card = (mmc_tot_in_flight(mq) == 0); | |
1495 | ||
1496 | mmc_cqe_check_busy(mq); | |
1497 | ||
f5d72c5c | 1498 | spin_unlock_irqrestore(&mq->lock, flags); |
1e8e55b6 AH |
1499 | |
1500 | if (!mq->cqe_busy) | |
1501 | blk_mq_run_hw_queues(q, true); | |
1502 | ||
1503 | if (put_card) | |
1504 | mmc_put_card(mq->card, &mq->ctx); | |
1505 | } | |
1506 | ||
1507 | void mmc_blk_cqe_recovery(struct mmc_queue *mq) | |
1508 | { | |
1509 | struct mmc_card *card = mq->card; | |
1510 | struct mmc_host *host = card->host; | |
1511 | int err; | |
1512 | ||
1513 | pr_debug("%s: CQE recovery start\n", mmc_hostname(host)); | |
1514 | ||
1515 | err = mmc_cqe_recovery(host); | |
1516 | if (err) | |
1517 | mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY); | |
1518 | else | |
1519 | mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY); | |
1520 | ||
1521 | pr_debug("%s: CQE recovery done\n", mmc_hostname(host)); | |
1522 | } | |
1523 | ||
1524 | static void mmc_blk_cqe_req_done(struct mmc_request *mrq) | |
1525 | { | |
1526 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
1527 | brq.mrq); | |
1528 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1529 | struct request_queue *q = req->q; | |
1530 | struct mmc_queue *mq = q->queuedata; | |
1531 | ||
1532 | /* | |
1533 | * Block layer timeouts race with completions which means the normal | |
1534 | * completion path cannot be used during recovery. | |
1535 | */ | |
1536 | if (mq->in_recovery) | |
1537 | mmc_blk_cqe_complete_rq(mq, req); | |
1538 | else | |
1539 | blk_mq_complete_request(req); | |
1540 | } | |
1541 | ||
1542 | static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
1543 | { | |
1544 | mrq->done = mmc_blk_cqe_req_done; | |
1545 | mrq->recovery_notifier = mmc_cqe_recovery_notifier; | |
1546 | ||
1547 | return mmc_cqe_start_req(host, mrq); | |
1548 | } | |
1549 | ||
1550 | static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq, | |
1551 | struct request *req) | |
1552 | { | |
1553 | struct mmc_blk_request *brq = &mqrq->brq; | |
1554 | ||
1555 | memset(brq, 0, sizeof(*brq)); | |
1556 | ||
1557 | brq->mrq.cmd = &brq->cmd; | |
1558 | brq->mrq.tag = req->tag; | |
1559 | ||
1560 | return &brq->mrq; | |
1561 | } | |
1562 | ||
1563 | static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req) | |
1564 | { | |
1565 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1566 | struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req); | |
1567 | ||
1568 | mrq->cmd->opcode = MMC_SWITCH; | |
1569 | mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1570 | (EXT_CSD_FLUSH_CACHE << 16) | | |
1571 | (1 << 8) | | |
1572 | EXT_CSD_CMD_SET_NORMAL; | |
1573 | mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B; | |
1574 | ||
1575 | return mmc_blk_cqe_start_req(mq->card->host, mrq); | |
1576 | } | |
1577 | ||
1578 | static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req) | |
1579 | { | |
1580 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1581 | ||
1582 | mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL); | |
1583 | ||
1584 | return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq); | |
1585 | } | |
1586 | ||
ca5717f7 AH |
1587 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
1588 | struct mmc_card *card, | |
1589 | int disable_multi, | |
1590 | struct mmc_queue *mq) | |
1591 | { | |
1592 | u32 readcmd, writecmd; | |
1593 | struct mmc_blk_request *brq = &mqrq->brq; | |
67e69d52 | 1594 | struct request *req = mmc_queue_req_to_req(mqrq); |
ca5717f7 AH |
1595 | struct mmc_blk_data *md = mq->blkdata; |
1596 | bool do_rel_wr, do_data_tag; | |
1597 | ||
1598 | mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag); | |
1599 | ||
1600 | brq->mrq.cmd = &brq->cmd; | |
1601 | ||
1602 | brq->cmd.arg = blk_rq_pos(req); | |
1603 | if (!mmc_card_blockaddr(card)) | |
1604 | brq->cmd.arg <<= 9; | |
1605 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1606 | ||
54d49d77 PF |
1607 | if (brq->data.blocks > 1 || do_rel_wr) { |
1608 | /* SPI multiblock writes terminate using a special | |
1609 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1610 | */ |
54d49d77 PF |
1611 | if (!mmc_host_is_spi(card->host) || |
1612 | rq_data_dir(req) == READ) | |
1613 | brq->mrq.stop = &brq->stop; | |
1614 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1615 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1616 | } else { | |
1617 | brq->mrq.stop = NULL; | |
1618 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1619 | writecmd = MMC_WRITE_BLOCK; | |
1620 | } | |
ca5717f7 | 1621 | brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd; |
4265900e | 1622 | |
54d49d77 PF |
1623 | /* |
1624 | * Pre-defined multi-block transfers are preferable to | |
1625 | * open ended-ones (and necessary for reliable writes). | |
1626 | * However, it is not sufficient to just send CMD23, | |
1627 | * and avoid the final CMD12, as on an error condition | |
1628 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1629 | * with Auto-CMD23 enhancements provided by some | |
1630 | * hosts, means that the complexity of dealing | |
1631 | * with this is best left to the host. If CMD23 is | |
1632 | * supported by card and host, we'll fill sbc in and let | |
1633 | * the host deal with handling it correctly. This means | |
1634 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1635 | * change of behavior will be observed. | |
1636 | * | |
1637 | * N.B: Some MMC cards experience perf degradation. | |
1638 | * We'll avoid using CMD23-bounded multiblock writes for | |
1639 | * these, while retaining features like reliable writes. | |
1640 | */ | |
4265900e SD |
1641 | if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && |
1642 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || | |
1643 | do_data_tag)) { | |
54d49d77 PF |
1644 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; |
1645 | brq->sbc.arg = brq->data.blocks | | |
4265900e SD |
1646 | (do_rel_wr ? (1 << 31) : 0) | |
1647 | (do_data_tag ? (1 << 29) : 0); | |
54d49d77 PF |
1648 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1649 | brq->mrq.sbc = &brq->sbc; | |
1650 | } | |
54d49d77 | 1651 | } |
6a79e391 | 1652 | |
81196976 | 1653 | #define MMC_MAX_RETRIES 5 |
7eb43d53 | 1654 | #define MMC_DATA_RETRIES 2 |
81196976 AH |
1655 | #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1) |
1656 | ||
7eb43d53 AH |
1657 | static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout) |
1658 | { | |
1659 | struct mmc_command cmd = { | |
1660 | .opcode = MMC_STOP_TRANSMISSION, | |
1661 | .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC, | |
1662 | /* Some hosts wait for busy anyway, so provide a busy timeout */ | |
1663 | .busy_timeout = timeout, | |
1664 | }; | |
1665 | ||
1666 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
1667 | } | |
1668 | ||
1669 | static int mmc_blk_fix_state(struct mmc_card *card, struct request *req) | |
1670 | { | |
1671 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1672 | struct mmc_blk_request *brq = &mqrq->brq; | |
1673 | unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data); | |
1674 | int err; | |
1675 | ||
1676 | mmc_retune_hold_now(card->host); | |
1677 | ||
1678 | mmc_blk_send_stop(card, timeout); | |
1679 | ||
0fbfd125 | 1680 | err = card_busy_detect(card, timeout, req, NULL); |
7eb43d53 AH |
1681 | |
1682 | mmc_retune_release(card->host); | |
1683 | ||
1684 | return err; | |
1685 | } | |
1686 | ||
81196976 AH |
1687 | #define MMC_READ_SINGLE_RETRIES 2 |
1688 | ||
1689 | /* Single sector read during recovery */ | |
1690 | static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) | |
1691 | { | |
1692 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1693 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1694 | struct mmc_card *card = mq->card; | |
1695 | struct mmc_host *host = card->host; | |
1696 | blk_status_t error = BLK_STS_OK; | |
1697 | int retries = 0; | |
1698 | ||
1699 | do { | |
1700 | u32 status; | |
1701 | int err; | |
1702 | ||
1703 | mmc_blk_rw_rq_prep(mqrq, card, 1, mq); | |
1704 | ||
1705 | mmc_wait_for_req(host, mrq); | |
1706 | ||
1707 | err = mmc_send_status(card, &status); | |
1708 | if (err) | |
1709 | goto error_exit; | |
1710 | ||
1711 | if (!mmc_host_is_spi(host) && | |
7eb43d53 AH |
1712 | !mmc_blk_in_tran_state(status)) { |
1713 | err = mmc_blk_fix_state(card, req); | |
81196976 AH |
1714 | if (err) |
1715 | goto error_exit; | |
1716 | } | |
1717 | ||
1718 | if (mrq->cmd->error && retries++ < MMC_READ_SINGLE_RETRIES) | |
1719 | continue; | |
1720 | ||
1721 | retries = 0; | |
1722 | ||
1723 | if (mrq->cmd->error || | |
1724 | mrq->data->error || | |
1725 | (!mmc_host_is_spi(host) && | |
1726 | (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS))) | |
1727 | error = BLK_STS_IOERR; | |
1728 | else | |
1729 | error = BLK_STS_OK; | |
1730 | ||
1731 | } while (blk_update_request(req, error, 512)); | |
1732 | ||
1733 | return; | |
1734 | ||
1735 | error_exit: | |
1736 | mrq->data->bytes_xfered = 0; | |
1737 | blk_update_request(req, BLK_STS_IOERR, 512); | |
1738 | /* Let it try the remaining request again */ | |
1739 | if (mqrq->retries > MMC_MAX_RETRIES - 1) | |
1740 | mqrq->retries = MMC_MAX_RETRIES - 1; | |
1741 | } | |
1742 | ||
7eb43d53 AH |
1743 | static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) |
1744 | { | |
1745 | return !!brq->mrq.sbc; | |
1746 | } | |
1747 | ||
1748 | static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) | |
1749 | { | |
1750 | return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; | |
1751 | } | |
1752 | ||
1753 | /* | |
1754 | * Check for errors the host controller driver might not have seen such as | |
1755 | * response mode errors or invalid card state. | |
1756 | */ | |
1757 | static bool mmc_blk_status_error(struct request *req, u32 status) | |
1758 | { | |
1759 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1760 | struct mmc_blk_request *brq = &mqrq->brq; | |
1761 | struct mmc_queue *mq = req->q->queuedata; | |
1762 | u32 stop_err_bits; | |
1763 | ||
1764 | if (mmc_host_is_spi(mq->card->host)) | |
aa950144 | 1765 | return false; |
7eb43d53 AH |
1766 | |
1767 | stop_err_bits = mmc_blk_stop_err_bits(brq); | |
1768 | ||
1769 | return brq->cmd.resp[0] & CMD_ERRORS || | |
1770 | brq->stop.resp[0] & stop_err_bits || | |
1771 | status & stop_err_bits || | |
1772 | (rq_data_dir(req) == WRITE && !mmc_blk_in_tran_state(status)); | |
1773 | } | |
1774 | ||
1775 | static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq) | |
1776 | { | |
1777 | return !brq->sbc.error && !brq->cmd.error && | |
1778 | !(brq->cmd.resp[0] & CMD_ERRORS); | |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * Requests are completed by mmc_blk_mq_complete_rq() which sets simple | |
1783 | * policy: | |
1784 | * 1. A request that has transferred at least some data is considered | |
1785 | * successful and will be requeued if there is remaining data to | |
1786 | * transfer. | |
1787 | * 2. Otherwise the number of retries is incremented and the request | |
1788 | * will be requeued if there are remaining retries. | |
1789 | * 3. Otherwise the request will be errored out. | |
1790 | * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and | |
1791 | * mqrq->retries. So there are only 4 possible actions here: | |
1792 | * 1. do not accept the bytes_xfered value i.e. set it to zero | |
1793 | * 2. change mqrq->retries to determine the number of retries | |
1794 | * 3. try to reset the card | |
1795 | * 4. read one sector at a time | |
1796 | */ | |
81196976 AH |
1797 | static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) |
1798 | { | |
1799 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1800 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1801 | struct mmc_blk_request *brq = &mqrq->brq; | |
1802 | struct mmc_blk_data *md = mq->blkdata; | |
1803 | struct mmc_card *card = mq->card; | |
7eb43d53 AH |
1804 | u32 status; |
1805 | u32 blocks; | |
1806 | int err; | |
81196976 | 1807 | |
7eb43d53 AH |
1808 | /* |
1809 | * Some errors the host driver might not have seen. Set the number of | |
1810 | * bytes transferred to zero in that case. | |
1811 | */ | |
1812 | err = __mmc_send_status(card, &status, 0); | |
1813 | if (err || mmc_blk_status_error(req, status)) | |
1814 | brq->data.bytes_xfered = 0; | |
81196976 AH |
1815 | |
1816 | mmc_retune_release(card->host); | |
1817 | ||
1818 | /* | |
7eb43d53 AH |
1819 | * Try again to get the status. This also provides an opportunity for |
1820 | * re-tuning. | |
81196976 | 1821 | */ |
7eb43d53 AH |
1822 | if (err) |
1823 | err = __mmc_send_status(card, &status, 0); | |
81196976 | 1824 | |
7eb43d53 AH |
1825 | /* |
1826 | * Nothing more to do after the number of bytes transferred has been | |
1827 | * updated and there is no card. | |
1828 | */ | |
1829 | if (err && mmc_detect_card_removed(card->host)) | |
1830 | return; | |
81196976 | 1831 | |
7eb43d53 AH |
1832 | /* Try to get back to "tran" state */ |
1833 | if (!mmc_host_is_spi(mq->card->host) && | |
1834 | (err || !mmc_blk_in_tran_state(status))) | |
1835 | err = mmc_blk_fix_state(mq->card, req); | |
1836 | ||
1837 | /* | |
1838 | * Special case for SD cards where the card might record the number of | |
1839 | * blocks written. | |
1840 | */ | |
1841 | if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) && | |
1842 | rq_data_dir(req) == WRITE) { | |
1843 | if (mmc_sd_num_wr_blocks(card, &blocks)) | |
1844 | brq->data.bytes_xfered = 0; | |
1845 | else | |
1846 | brq->data.bytes_xfered = blocks << 9; | |
81196976 | 1847 | } |
7eb43d53 AH |
1848 | |
1849 | /* Reset if the card is in a bad state */ | |
1850 | if (!mmc_host_is_spi(mq->card->host) && | |
1851 | err && mmc_blk_reset(md, card->host, type)) { | |
1852 | pr_err("%s: recovery failed!\n", req->rq_disk->disk_name); | |
81196976 | 1853 | mqrq->retries = MMC_NO_RETRIES; |
7eb43d53 AH |
1854 | return; |
1855 | } | |
1856 | ||
1857 | /* | |
1858 | * If anything was done, just return and if there is anything remaining | |
1859 | * on the request it will get requeued. | |
1860 | */ | |
1861 | if (brq->data.bytes_xfered) | |
1862 | return; | |
1863 | ||
1864 | /* Reset before last retry */ | |
1865 | if (mqrq->retries + 1 == MMC_MAX_RETRIES) | |
1866 | mmc_blk_reset(md, card->host, type); | |
1867 | ||
1868 | /* Command errors fail fast, so use all MMC_MAX_RETRIES */ | |
1869 | if (brq->sbc.error || brq->cmd.error) | |
1870 | return; | |
1871 | ||
1872 | /* Reduce the remaining retries for data errors */ | |
1873 | if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) { | |
1874 | mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES; | |
1875 | return; | |
1876 | } | |
1877 | ||
1878 | /* FIXME: Missing single sector read for large sector size */ | |
1879 | if (!mmc_large_sector(card) && rq_data_dir(req) == READ && | |
1880 | brq->data.blocks > 1) { | |
1881 | /* Read one sector at a time */ | |
1882 | mmc_blk_read_single(mq, req); | |
1883 | return; | |
81196976 AH |
1884 | } |
1885 | } | |
1886 | ||
10f21df4 AH |
1887 | static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) |
1888 | { | |
1889 | mmc_blk_eval_resp_error(brq); | |
1890 | ||
1891 | return brq->sbc.error || brq->cmd.error || brq->stop.error || | |
1892 | brq->data.error || brq->cmd.resp[0] & CMD_ERRORS; | |
1893 | } | |
1894 | ||
88a51646 AH |
1895 | static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) |
1896 | { | |
1897 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
f47a1fe3 | 1898 | u32 status = 0; |
88a51646 AH |
1899 | int err; |
1900 | ||
1901 | if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) | |
1902 | return 0; | |
1903 | ||
0fbfd125 | 1904 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, req, &status); |
88a51646 | 1905 | |
f47a1fe3 AH |
1906 | /* |
1907 | * Do not assume data transferred correctly if there are any error bits | |
1908 | * set. | |
1909 | */ | |
1910 | if (status & mmc_blk_stop_err_bits(&mqrq->brq)) { | |
1911 | mqrq->brq.data.bytes_xfered = 0; | |
88a51646 AH |
1912 | err = err ? err : -EIO; |
1913 | } | |
1914 | ||
f47a1fe3 AH |
1915 | /* Copy the exception bit so it will be seen later on */ |
1916 | if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT) | |
1917 | mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; | |
1918 | ||
88a51646 AH |
1919 | return err; |
1920 | } | |
1921 | ||
10f21df4 AH |
1922 | static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq, |
1923 | struct request *req) | |
1924 | { | |
1925 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1926 | ||
1927 | mmc_blk_reset_success(mq->blkdata, type); | |
1928 | } | |
1929 | ||
81196976 AH |
1930 | static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req) |
1931 | { | |
1932 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1933 | unsigned int nr_bytes = mqrq->brq.data.bytes_xfered; | |
1934 | ||
1935 | if (nr_bytes) { | |
1936 | if (blk_update_request(req, BLK_STS_OK, nr_bytes)) | |
1937 | blk_mq_requeue_request(req, true); | |
1938 | else | |
1939 | __blk_mq_end_request(req, BLK_STS_OK); | |
1940 | } else if (!blk_rq_bytes(req)) { | |
1941 | __blk_mq_end_request(req, BLK_STS_IOERR); | |
1942 | } else if (mqrq->retries++ < MMC_MAX_RETRIES) { | |
1943 | blk_mq_requeue_request(req, true); | |
1944 | } else { | |
1945 | if (mmc_card_removed(mq->card)) | |
1946 | req->rq_flags |= RQF_QUIET; | |
1947 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq, | |
1952 | struct mmc_queue_req *mqrq) | |
1953 | { | |
1954 | return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) && | |
1955 | (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT || | |
1956 | mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT); | |
1957 | } | |
1958 | ||
1959 | static void mmc_blk_urgent_bkops(struct mmc_queue *mq, | |
1960 | struct mmc_queue_req *mqrq) | |
1961 | { | |
1962 | if (mmc_blk_urgent_bkops_needed(mq, mqrq)) | |
0c204979 | 1963 | mmc_run_bkops(mq->card); |
81196976 AH |
1964 | } |
1965 | ||
1966 | void mmc_blk_mq_complete(struct request *req) | |
1967 | { | |
1968 | struct mmc_queue *mq = req->q->queuedata; | |
1969 | ||
1e8e55b6 AH |
1970 | if (mq->use_cqe) |
1971 | mmc_blk_cqe_complete_rq(mq, req); | |
1972 | else | |
1973 | mmc_blk_mq_complete_rq(mq, req); | |
81196976 AH |
1974 | } |
1975 | ||
1976 | static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, | |
1977 | struct request *req) | |
1978 | { | |
1979 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
88a51646 | 1980 | struct mmc_host *host = mq->card->host; |
81196976 | 1981 | |
88a51646 AH |
1982 | if (mmc_blk_rq_error(&mqrq->brq) || |
1983 | mmc_blk_card_busy(mq->card, req)) { | |
1984 | mmc_blk_mq_rw_recovery(mq, req); | |
1985 | } else { | |
1986 | mmc_blk_rw_reset_success(mq, req); | |
1987 | mmc_retune_release(host); | |
1988 | } | |
81196976 AH |
1989 | |
1990 | mmc_blk_urgent_bkops(mq, mqrq); | |
1991 | } | |
1992 | ||
1993 | static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) | |
1994 | { | |
81196976 AH |
1995 | unsigned long flags; |
1996 | bool put_card; | |
1997 | ||
f5d72c5c | 1998 | spin_lock_irqsave(&mq->lock, flags); |
81196976 AH |
1999 | |
2000 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
2001 | ||
2002 | put_card = (mmc_tot_in_flight(mq) == 0); | |
2003 | ||
f5d72c5c | 2004 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2005 | |
2006 | if (put_card) | |
2007 | mmc_put_card(mq->card, &mq->ctx); | |
2008 | } | |
2009 | ||
2010 | static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) | |
2011 | { | |
2012 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2013 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
2014 | struct mmc_host *host = mq->card->host; | |
2015 | ||
2016 | mmc_post_req(host, mrq, 0); | |
2017 | ||
10f21df4 AH |
2018 | /* |
2019 | * Block layer timeouts race with completions which means the normal | |
2020 | * completion path cannot be used during recovery. | |
2021 | */ | |
2022 | if (mq->in_recovery) | |
2023 | mmc_blk_mq_complete_rq(mq, req); | |
2024 | else | |
2025 | blk_mq_complete_request(req); | |
81196976 AH |
2026 | |
2027 | mmc_blk_mq_dec_in_flight(mq, req); | |
2028 | } | |
2029 | ||
10f21df4 AH |
2030 | void mmc_blk_mq_recovery(struct mmc_queue *mq) |
2031 | { | |
2032 | struct request *req = mq->recovery_req; | |
2033 | struct mmc_host *host = mq->card->host; | |
2034 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2035 | ||
2036 | mq->recovery_req = NULL; | |
2037 | mq->rw_wait = false; | |
2038 | ||
2039 | if (mmc_blk_rq_error(&mqrq->brq)) { | |
2040 | mmc_retune_hold_now(host); | |
2041 | mmc_blk_mq_rw_recovery(mq, req); | |
2042 | } | |
2043 | ||
2044 | mmc_blk_urgent_bkops(mq, mqrq); | |
2045 | ||
2046 | mmc_blk_mq_post_req(mq, req); | |
2047 | } | |
2048 | ||
81196976 AH |
2049 | static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, |
2050 | struct request **prev_req) | |
2051 | { | |
10f21df4 AH |
2052 | if (mmc_host_done_complete(mq->card->host)) |
2053 | return; | |
2054 | ||
81196976 AH |
2055 | mutex_lock(&mq->complete_lock); |
2056 | ||
2057 | if (!mq->complete_req) | |
2058 | goto out_unlock; | |
2059 | ||
2060 | mmc_blk_mq_poll_completion(mq, mq->complete_req); | |
2061 | ||
2062 | if (prev_req) | |
2063 | *prev_req = mq->complete_req; | |
2064 | else | |
2065 | mmc_blk_mq_post_req(mq, mq->complete_req); | |
2066 | ||
2067 | mq->complete_req = NULL; | |
2068 | ||
2069 | out_unlock: | |
2070 | mutex_unlock(&mq->complete_lock); | |
2071 | } | |
2072 | ||
2073 | void mmc_blk_mq_complete_work(struct work_struct *work) | |
2074 | { | |
2075 | struct mmc_queue *mq = container_of(work, struct mmc_queue, | |
2076 | complete_work); | |
2077 | ||
2078 | mmc_blk_mq_complete_prev_req(mq, NULL); | |
2079 | } | |
2080 | ||
2081 | static void mmc_blk_mq_req_done(struct mmc_request *mrq) | |
2082 | { | |
2083 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
2084 | brq.mrq); | |
2085 | struct request *req = mmc_queue_req_to_req(mqrq); | |
2086 | struct request_queue *q = req->q; | |
2087 | struct mmc_queue *mq = q->queuedata; | |
10f21df4 | 2088 | struct mmc_host *host = mq->card->host; |
81196976 | 2089 | unsigned long flags; |
81196976 | 2090 | |
10f21df4 AH |
2091 | if (!mmc_host_done_complete(host)) { |
2092 | bool waiting; | |
81196976 | 2093 | |
10f21df4 AH |
2094 | /* |
2095 | * We cannot complete the request in this context, so record | |
2096 | * that there is a request to complete, and that a following | |
2097 | * request does not need to wait (although it does need to | |
2098 | * complete complete_req first). | |
2099 | */ | |
f5d72c5c | 2100 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2101 | mq->complete_req = req; |
2102 | mq->rw_wait = false; | |
2103 | waiting = mq->waiting; | |
f5d72c5c | 2104 | spin_unlock_irqrestore(&mq->lock, flags); |
10f21df4 AH |
2105 | |
2106 | /* | |
2107 | * If 'waiting' then the waiting task will complete this | |
2108 | * request, otherwise queue a work to do it. Note that | |
2109 | * complete_work may still race with the dispatch of a following | |
2110 | * request. | |
2111 | */ | |
2112 | if (waiting) | |
2113 | wake_up(&mq->wait); | |
2114 | else | |
2115 | kblockd_schedule_work(&mq->complete_work); | |
2116 | ||
2117 | return; | |
2118 | } | |
2119 | ||
2120 | /* Take the recovery path for errors or urgent background operations */ | |
2121 | if (mmc_blk_rq_error(&mqrq->brq) || | |
2122 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
f5d72c5c | 2123 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2124 | mq->recovery_needed = true; |
2125 | mq->recovery_req = req; | |
f5d72c5c | 2126 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 | 2127 | wake_up(&mq->wait); |
10f21df4 AH |
2128 | schedule_work(&mq->recovery_work); |
2129 | return; | |
2130 | } | |
2131 | ||
2132 | mmc_blk_rw_reset_success(mq, req); | |
2133 | ||
2134 | mq->rw_wait = false; | |
2135 | wake_up(&mq->wait); | |
2136 | ||
2137 | mmc_blk_mq_post_req(mq, req); | |
81196976 AH |
2138 | } |
2139 | ||
2140 | static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) | |
2141 | { | |
81196976 AH |
2142 | unsigned long flags; |
2143 | bool done; | |
2144 | ||
2145 | /* | |
10f21df4 AH |
2146 | * Wait while there is another request in progress, but not if recovery |
2147 | * is needed. Also indicate whether there is a request waiting to start. | |
81196976 | 2148 | */ |
f5d72c5c | 2149 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2150 | if (mq->recovery_needed) { |
2151 | *err = -EBUSY; | |
2152 | done = true; | |
2153 | } else { | |
2154 | done = !mq->rw_wait; | |
2155 | } | |
81196976 | 2156 | mq->waiting = !done; |
f5d72c5c | 2157 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2158 | |
2159 | return done; | |
2160 | } | |
2161 | ||
2162 | static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req) | |
2163 | { | |
2164 | int err = 0; | |
2165 | ||
2166 | wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err)); | |
2167 | ||
2168 | /* Always complete the previous request if there is one */ | |
2169 | mmc_blk_mq_complete_prev_req(mq, prev_req); | |
2170 | ||
2171 | return err; | |
2172 | } | |
2173 | ||
2174 | static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, | |
2175 | struct request *req) | |
2176 | { | |
2177 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2178 | struct mmc_host *host = mq->card->host; | |
2179 | struct request *prev_req = NULL; | |
2180 | int err = 0; | |
2181 | ||
2182 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
2183 | ||
2184 | mqrq->brq.mrq.done = mmc_blk_mq_req_done; | |
2185 | ||
2186 | mmc_pre_req(host, &mqrq->brq.mrq); | |
2187 | ||
2188 | err = mmc_blk_rw_wait(mq, &prev_req); | |
2189 | if (err) | |
2190 | goto out_post_req; | |
2191 | ||
2192 | mq->rw_wait = true; | |
2193 | ||
2194 | err = mmc_start_request(host, &mqrq->brq.mrq); | |
2195 | ||
2196 | if (prev_req) | |
2197 | mmc_blk_mq_post_req(mq, prev_req); | |
2198 | ||
10f21df4 | 2199 | if (err) |
81196976 | 2200 | mq->rw_wait = false; |
10f21df4 AH |
2201 | |
2202 | /* Release re-tuning here where there is no synchronization required */ | |
2203 | if (err || mmc_host_done_complete(host)) | |
81196976 | 2204 | mmc_retune_release(host); |
81196976 AH |
2205 | |
2206 | out_post_req: | |
2207 | if (err) | |
2208 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
2209 | ||
2210 | return err; | |
2211 | } | |
2212 | ||
2213 | static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host) | |
2214 | { | |
1e8e55b6 AH |
2215 | if (mq->use_cqe) |
2216 | return host->cqe_ops->cqe_wait_for_idle(host); | |
2217 | ||
81196976 AH |
2218 | return mmc_blk_rw_wait(mq, NULL); |
2219 | } | |
2220 | ||
2221 | enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) | |
2222 | { | |
2223 | struct mmc_blk_data *md = mq->blkdata; | |
2224 | struct mmc_card *card = md->queue.card; | |
2225 | struct mmc_host *host = card->host; | |
2226 | int ret; | |
2227 | ||
2228 | ret = mmc_blk_part_switch(card, md->part_type); | |
2229 | if (ret) | |
2230 | return MMC_REQ_FAILED_TO_START; | |
2231 | ||
2232 | switch (mmc_issue_type(mq, req)) { | |
2233 | case MMC_ISSUE_SYNC: | |
2234 | ret = mmc_blk_wait_for_idle(mq, host); | |
2235 | if (ret) | |
2236 | return MMC_REQ_BUSY; | |
2237 | switch (req_op(req)) { | |
2238 | case REQ_OP_DRV_IN: | |
2239 | case REQ_OP_DRV_OUT: | |
2240 | mmc_blk_issue_drv_op(mq, req); | |
2241 | break; | |
2242 | case REQ_OP_DISCARD: | |
2243 | mmc_blk_issue_discard_rq(mq, req); | |
2244 | break; | |
2245 | case REQ_OP_SECURE_ERASE: | |
2246 | mmc_blk_issue_secdiscard_rq(mq, req); | |
2247 | break; | |
2248 | case REQ_OP_FLUSH: | |
2249 | mmc_blk_issue_flush(mq, req); | |
2250 | break; | |
2251 | default: | |
2252 | WARN_ON_ONCE(1); | |
2253 | return MMC_REQ_FAILED_TO_START; | |
2254 | } | |
2255 | return MMC_REQ_FINISHED; | |
1e8e55b6 | 2256 | case MMC_ISSUE_DCMD: |
81196976 AH |
2257 | case MMC_ISSUE_ASYNC: |
2258 | switch (req_op(req)) { | |
1e8e55b6 AH |
2259 | case REQ_OP_FLUSH: |
2260 | ret = mmc_blk_cqe_issue_flush(mq, req); | |
2261 | break; | |
81196976 AH |
2262 | case REQ_OP_READ: |
2263 | case REQ_OP_WRITE: | |
1e8e55b6 AH |
2264 | if (mq->use_cqe) |
2265 | ret = mmc_blk_cqe_issue_rw_rq(mq, req); | |
2266 | else | |
2267 | ret = mmc_blk_mq_issue_rw_rq(mq, req); | |
81196976 AH |
2268 | break; |
2269 | default: | |
2270 | WARN_ON_ONCE(1); | |
2271 | ret = -EINVAL; | |
2272 | } | |
2273 | if (!ret) | |
2274 | return MMC_REQ_STARTED; | |
2275 | return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START; | |
2276 | default: | |
2277 | WARN_ON_ONCE(1); | |
2278 | return MMC_REQ_FAILED_TO_START; | |
2279 | } | |
2280 | } | |
2281 | ||
a6f6c96b RK |
2282 | static inline int mmc_blk_readonly(struct mmc_card *card) |
2283 | { | |
2284 | return mmc_card_readonly(card) || | |
2285 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
2286 | } | |
2287 | ||
371a689f AW |
2288 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
2289 | struct device *parent, | |
2290 | sector_t size, | |
2291 | bool default_ro, | |
add710ea JR |
2292 | const char *subname, |
2293 | int area_type) | |
1da177e4 LT |
2294 | { |
2295 | struct mmc_blk_data *md; | |
2296 | int devidx, ret; | |
2297 | ||
a04848c7 | 2298 | devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); |
e7b42769 SL |
2299 | if (devidx < 0) { |
2300 | /* | |
2301 | * We get -ENOSPC because there are no more any available | |
2302 | * devidx. The reason may be that, either userspace haven't yet | |
2303 | * unmounted the partitions, which postpones mmc_blk_release() | |
2304 | * from being called, or the device has more partitions than | |
2305 | * what we support. | |
2306 | */ | |
2307 | if (devidx == -ENOSPC) | |
2308 | dev_err(mmc_dev(card->host), | |
2309 | "no more device IDs available\n"); | |
2310 | ||
a04848c7 | 2311 | return ERR_PTR(devidx); |
e7b42769 | 2312 | } |
1da177e4 | 2313 | |
dd00cc48 | 2314 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
2315 | if (!md) { |
2316 | ret = -ENOMEM; | |
2317 | goto out; | |
2318 | } | |
1da177e4 | 2319 | |
add710ea JR |
2320 | md->area_type = area_type; |
2321 | ||
a6f6c96b RK |
2322 | /* |
2323 | * Set the read-only status based on the supported commands | |
2324 | * and the write protect switch. | |
2325 | */ | |
2326 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 2327 | |
5e71b7a6 | 2328 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
2329 | if (md->disk == NULL) { |
2330 | ret = -ENOMEM; | |
2331 | goto err_kfree; | |
2332 | } | |
1da177e4 | 2333 | |
371a689f | 2334 | INIT_LIST_HEAD(&md->part); |
97548575 | 2335 | INIT_LIST_HEAD(&md->rpmbs); |
a6f6c96b | 2336 | md->usage = 1; |
1da177e4 | 2337 | |
f5d72c5c | 2338 | ret = mmc_init_queue(&md->queue, card); |
a6f6c96b RK |
2339 | if (ret) |
2340 | goto err_putdisk; | |
1da177e4 | 2341 | |
7db3028e | 2342 | md->queue.blkdata = md; |
d2b18394 | 2343 | |
41e3efd0 AH |
2344 | /* |
2345 | * Keep an extra reference to the queue so that we can shutdown the | |
2346 | * queue (i.e. call blk_cleanup_queue()) while there are still | |
2347 | * references to the 'md'. The corresponding blk_put_queue() is in | |
2348 | * mmc_blk_put(). | |
2349 | */ | |
2350 | if (!blk_get_queue(md->queue.queue)) { | |
2351 | mmc_cleanup_queue(&md->queue); | |
2361bfb0 | 2352 | ret = -ENODEV; |
41e3efd0 AH |
2353 | goto err_putdisk; |
2354 | } | |
2355 | ||
fe6b4c88 | 2356 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 2357 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
2358 | md->disk->fops = &mmc_bdops; |
2359 | md->disk->private_data = md; | |
2360 | md->disk->queue = md->queue.queue; | |
307d8e6f | 2361 | md->parent = parent; |
371a689f | 2362 | set_disk_ro(md->disk, md->read_only || default_ro); |
382c55f8 | 2363 | md->disk->flags = GENHD_FL_EXT_DEVT; |
f5b4d71f | 2364 | if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) |
207b652c AG |
2365 | md->disk->flags |= GENHD_FL_NO_PART_SCAN |
2366 | | GENHD_FL_SUPPRESS_PARTITION_INFO; | |
a6f6c96b RK |
2367 | |
2368 | /* | |
2369 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
2370 | * | |
2371 | * - be set for removable media with permanent block devices | |
2372 | * - be unset for removable block devices with permanent media | |
2373 | * | |
2374 | * Since MMC block devices clearly fall under the second | |
2375 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
2376 | * should use the block device creation/destruction hotplug | |
2377 | * messages to tell when the card is present. | |
2378 | */ | |
2379 | ||
f06c9153 | 2380 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
9aaf3437 | 2381 | "mmcblk%u%s", card->host->index, subname ? subname : ""); |
a6f6c96b | 2382 | |
a5075eb9 SD |
2383 | if (mmc_card_mmc(card)) |
2384 | blk_queue_logical_block_size(md->queue.queue, | |
2385 | card->ext_csd.data_sector_size); | |
2386 | else | |
2387 | blk_queue_logical_block_size(md->queue.queue, 512); | |
2388 | ||
371a689f | 2389 | set_capacity(md->disk, size); |
d0c97cfb | 2390 | |
f0d89972 | 2391 | if (mmc_host_cmd23(card->host)) { |
0ed50abb DG |
2392 | if ((mmc_card_mmc(card) && |
2393 | card->csd.mmca_vsn >= CSD_SPEC_VER_3) || | |
f0d89972 AW |
2394 | (mmc_card_sd(card) && |
2395 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
2396 | md->flags |= MMC_BLK_CMD23; | |
2397 | } | |
d0c97cfb AW |
2398 | |
2399 | if (mmc_card_mmc(card) && | |
2400 | md->flags & MMC_BLK_CMD23 && | |
2401 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || | |
2402 | card->ext_csd.rel_sectors)) { | |
2403 | md->flags |= MMC_BLK_REL_WR; | |
e9d5c746 | 2404 | blk_queue_write_cache(md->queue.queue, true, true); |
d0c97cfb AW |
2405 | } |
2406 | ||
371a689f AW |
2407 | return md; |
2408 | ||
2409 | err_putdisk: | |
2410 | put_disk(md->disk); | |
2411 | err_kfree: | |
2412 | kfree(md); | |
2413 | out: | |
a04848c7 | 2414 | ida_simple_remove(&mmc_blk_ida, devidx); |
371a689f AW |
2415 | return ERR_PTR(ret); |
2416 | } | |
2417 | ||
2418 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
2419 | { | |
2420 | sector_t size; | |
a6f6c96b | 2421 | |
85a18ad9 PO |
2422 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
2423 | /* | |
2424 | * The EXT_CSD sector count is in number or 512 byte | |
2425 | * sectors. | |
2426 | */ | |
371a689f | 2427 | size = card->ext_csd.sectors; |
85a18ad9 PO |
2428 | } else { |
2429 | /* | |
2430 | * The CSD capacity field is in units of read_blkbits. | |
2431 | * set_capacity takes units of 512 bytes. | |
2432 | */ | |
087de9ed KM |
2433 | size = (typeof(sector_t))card->csd.capacity |
2434 | << (card->csd.read_blkbits - 9); | |
85a18ad9 | 2435 | } |
371a689f | 2436 | |
7a30f2af | 2437 | return mmc_blk_alloc_req(card, &card->dev, size, false, NULL, |
add710ea | 2438 | MMC_BLK_DATA_AREA_MAIN); |
371a689f | 2439 | } |
a6f6c96b | 2440 | |
371a689f AW |
2441 | static int mmc_blk_alloc_part(struct mmc_card *card, |
2442 | struct mmc_blk_data *md, | |
2443 | unsigned int part_type, | |
2444 | sector_t size, | |
2445 | bool default_ro, | |
add710ea JR |
2446 | const char *subname, |
2447 | int area_type) | |
371a689f AW |
2448 | { |
2449 | char cap_str[10]; | |
2450 | struct mmc_blk_data *part_md; | |
2451 | ||
2452 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
add710ea | 2453 | subname, area_type); |
371a689f AW |
2454 | if (IS_ERR(part_md)) |
2455 | return PTR_ERR(part_md); | |
2456 | part_md->part_type = part_type; | |
2457 | list_add(&part_md->part, &md->part); | |
2458 | ||
b9f28d86 | 2459 | string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2, |
371a689f | 2460 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2461 | pr_info("%s: %s %s partition %u %s\n", |
371a689f AW |
2462 | part_md->disk->disk_name, mmc_card_id(card), |
2463 | mmc_card_name(card), part_md->part_type, cap_str); | |
2464 | return 0; | |
2465 | } | |
2466 | ||
97548575 LW |
2467 | /** |
2468 | * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev | |
2469 | * @filp: the character device file | |
2470 | * @cmd: the ioctl() command | |
2471 | * @arg: the argument from userspace | |
2472 | * | |
2473 | * This will essentially just redirect the ioctl()s coming in over to | |
2474 | * the main block device spawning the RPMB character device. | |
2475 | */ | |
2476 | static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd, | |
2477 | unsigned long arg) | |
2478 | { | |
2479 | struct mmc_rpmb_data *rpmb = filp->private_data; | |
2480 | int ret; | |
2481 | ||
2482 | switch (cmd) { | |
2483 | case MMC_IOC_CMD: | |
2484 | ret = mmc_blk_ioctl_cmd(rpmb->md, | |
2485 | (struct mmc_ioc_cmd __user *)arg, | |
2486 | rpmb); | |
2487 | break; | |
2488 | case MMC_IOC_MULTI_CMD: | |
2489 | ret = mmc_blk_ioctl_multi_cmd(rpmb->md, | |
2490 | (struct mmc_ioc_multi_cmd __user *)arg, | |
2491 | rpmb); | |
2492 | break; | |
2493 | default: | |
2494 | ret = -EINVAL; | |
2495 | break; | |
2496 | } | |
2497 | ||
b25b750d | 2498 | return ret; |
97548575 LW |
2499 | } |
2500 | ||
2501 | #ifdef CONFIG_COMPAT | |
2502 | static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd, | |
2503 | unsigned long arg) | |
2504 | { | |
2505 | return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
2506 | } | |
2507 | #endif | |
2508 | ||
2509 | static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp) | |
2510 | { | |
2511 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2512 | struct mmc_rpmb_data, chrdev); | |
2513 | ||
2514 | get_device(&rpmb->dev); | |
2515 | filp->private_data = rpmb; | |
1c87f735 | 2516 | mmc_blk_get(rpmb->md->disk); |
97548575 LW |
2517 | |
2518 | return nonseekable_open(inode, filp); | |
2519 | } | |
2520 | ||
2521 | static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp) | |
2522 | { | |
2523 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2524 | struct mmc_rpmb_data, chrdev); | |
2525 | ||
2526 | put_device(&rpmb->dev); | |
1c87f735 | 2527 | mmc_blk_put(rpmb->md); |
97548575 LW |
2528 | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | static const struct file_operations mmc_rpmb_fileops = { | |
2533 | .release = mmc_rpmb_chrdev_release, | |
2534 | .open = mmc_rpmb_chrdev_open, | |
2535 | .owner = THIS_MODULE, | |
2536 | .llseek = no_llseek, | |
2537 | .unlocked_ioctl = mmc_rpmb_ioctl, | |
2538 | #ifdef CONFIG_COMPAT | |
2539 | .compat_ioctl = mmc_rpmb_ioctl_compat, | |
2540 | #endif | |
2541 | }; | |
2542 | ||
1c87f735 LW |
2543 | static void mmc_blk_rpmb_device_release(struct device *dev) |
2544 | { | |
2545 | struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); | |
2546 | ||
2547 | ida_simple_remove(&mmc_rpmb_ida, rpmb->id); | |
2548 | kfree(rpmb); | |
2549 | } | |
97548575 LW |
2550 | |
2551 | static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, | |
2552 | struct mmc_blk_data *md, | |
2553 | unsigned int part_index, | |
2554 | sector_t size, | |
2555 | const char *subname) | |
2556 | { | |
2557 | int devidx, ret; | |
2558 | char rpmb_name[DISK_NAME_LEN]; | |
2559 | char cap_str[10]; | |
2560 | struct mmc_rpmb_data *rpmb; | |
2561 | ||
2562 | /* This creates the minor number for the RPMB char device */ | |
2563 | devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL); | |
2564 | if (devidx < 0) | |
2565 | return devidx; | |
2566 | ||
2567 | rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL); | |
1c87f735 LW |
2568 | if (!rpmb) { |
2569 | ida_simple_remove(&mmc_rpmb_ida, devidx); | |
97548575 | 2570 | return -ENOMEM; |
1c87f735 | 2571 | } |
97548575 LW |
2572 | |
2573 | snprintf(rpmb_name, sizeof(rpmb_name), | |
2574 | "mmcblk%u%s", card->host->index, subname ? subname : ""); | |
2575 | ||
2576 | rpmb->id = devidx; | |
2577 | rpmb->part_index = part_index; | |
2578 | rpmb->dev.init_name = rpmb_name; | |
2579 | rpmb->dev.bus = &mmc_rpmb_bus_type; | |
2580 | rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id); | |
2581 | rpmb->dev.parent = &card->dev; | |
1c87f735 | 2582 | rpmb->dev.release = mmc_blk_rpmb_device_release; |
97548575 LW |
2583 | device_initialize(&rpmb->dev); |
2584 | dev_set_drvdata(&rpmb->dev, rpmb); | |
2585 | rpmb->md = md; | |
2586 | ||
2587 | cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops); | |
2588 | rpmb->chrdev.owner = THIS_MODULE; | |
2589 | ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev); | |
2590 | if (ret) { | |
2591 | pr_err("%s: could not add character device\n", rpmb_name); | |
1c87f735 | 2592 | goto out_put_device; |
97548575 LW |
2593 | } |
2594 | ||
2595 | list_add(&rpmb->node, &md->rpmbs); | |
2596 | ||
2597 | string_get_size((u64)size, 512, STRING_UNITS_2, | |
2598 | cap_str, sizeof(cap_str)); | |
2599 | ||
2600 | pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n", | |
2601 | rpmb_name, mmc_card_id(card), | |
2602 | mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str, | |
2603 | MAJOR(mmc_rpmb_devt), rpmb->id); | |
2604 | ||
2605 | return 0; | |
2606 | ||
1c87f735 LW |
2607 | out_put_device: |
2608 | put_device(&rpmb->dev); | |
97548575 LW |
2609 | return ret; |
2610 | } | |
2611 | ||
2612 | static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb) | |
1c87f735 | 2613 | |
97548575 LW |
2614 | { |
2615 | cdev_device_del(&rpmb->chrdev, &rpmb->dev); | |
1c87f735 | 2616 | put_device(&rpmb->dev); |
97548575 LW |
2617 | } |
2618 | ||
e0c368d5 NJ |
2619 | /* MMC Physical partitions consist of two boot partitions and |
2620 | * up to four general purpose partitions. | |
2621 | * For each partition enabled in EXT_CSD a block device will be allocatedi | |
2622 | * to provide access to the partition. | |
2623 | */ | |
2624 | ||
371a689f AW |
2625 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) |
2626 | { | |
97548575 | 2627 | int idx, ret; |
371a689f AW |
2628 | |
2629 | if (!mmc_card_mmc(card)) | |
2630 | return 0; | |
2631 | ||
e0c368d5 | 2632 | for (idx = 0; idx < card->nr_parts; idx++) { |
97548575 LW |
2633 | if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) { |
2634 | /* | |
2635 | * RPMB partitions does not provide block access, they | |
2636 | * are only accessed using ioctl():s. Thus create | |
2637 | * special RPMB block devices that do not have a | |
2638 | * backing block queue for these. | |
2639 | */ | |
2640 | ret = mmc_blk_alloc_rpmb_part(card, md, | |
2641 | card->part[idx].part_cfg, | |
2642 | card->part[idx].size >> 9, | |
2643 | card->part[idx].name); | |
2644 | if (ret) | |
2645 | return ret; | |
2646 | } else if (card->part[idx].size) { | |
e0c368d5 NJ |
2647 | ret = mmc_blk_alloc_part(card, md, |
2648 | card->part[idx].part_cfg, | |
2649 | card->part[idx].size >> 9, | |
2650 | card->part[idx].force_ro, | |
add710ea JR |
2651 | card->part[idx].name, |
2652 | card->part[idx].area_type); | |
e0c368d5 NJ |
2653 | if (ret) |
2654 | return ret; | |
2655 | } | |
371a689f AW |
2656 | } |
2657 | ||
97548575 | 2658 | return 0; |
1da177e4 LT |
2659 | } |
2660 | ||
371a689f AW |
2661 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
2662 | { | |
add710ea JR |
2663 | struct mmc_card *card; |
2664 | ||
371a689f | 2665 | if (md) { |
fdfa20c1 PT |
2666 | /* |
2667 | * Flush remaining requests and free queues. It | |
2668 | * is freeing the queue that stops new requests | |
2669 | * from being accepted. | |
2670 | */ | |
8efb83a2 | 2671 | card = md->queue.card; |
371a689f AW |
2672 | if (md->disk->flags & GENHD_FL_UP) { |
2673 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
add710ea JR |
2674 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && |
2675 | card->ext_csd.boot_ro_lockable) | |
2676 | device_remove_file(disk_to_dev(md->disk), | |
2677 | &md->power_ro_lock); | |
371a689f | 2678 | |
371a689f AW |
2679 | del_gendisk(md->disk); |
2680 | } | |
57678e5a | 2681 | mmc_cleanup_queue(&md->queue); |
371a689f AW |
2682 | mmc_blk_put(md); |
2683 | } | |
2684 | } | |
2685 | ||
2686 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
2687 | struct mmc_blk_data *md) | |
2688 | { | |
2689 | struct list_head *pos, *q; | |
2690 | struct mmc_blk_data *part_md; | |
97548575 | 2691 | struct mmc_rpmb_data *rpmb; |
371a689f | 2692 | |
97548575 LW |
2693 | /* Remove RPMB partitions */ |
2694 | list_for_each_safe(pos, q, &md->rpmbs) { | |
2695 | rpmb = list_entry(pos, struct mmc_rpmb_data, node); | |
2696 | list_del(pos); | |
2697 | mmc_blk_remove_rpmb_part(rpmb); | |
2698 | } | |
2699 | /* Remove block partitions */ | |
371a689f AW |
2700 | list_for_each_safe(pos, q, &md->part) { |
2701 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
2702 | list_del(pos); | |
2703 | mmc_blk_remove_req(part_md); | |
2704 | } | |
2705 | } | |
2706 | ||
2707 | static int mmc_add_disk(struct mmc_blk_data *md) | |
2708 | { | |
2709 | int ret; | |
add710ea | 2710 | struct mmc_card *card = md->queue.card; |
371a689f | 2711 | |
fef912bf | 2712 | device_add_disk(md->parent, md->disk, NULL); |
371a689f AW |
2713 | md->force_ro.show = force_ro_show; |
2714 | md->force_ro.store = force_ro_store; | |
641c3187 | 2715 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
2716 | md->force_ro.attr.name = "force_ro"; |
2717 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
2718 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
2719 | if (ret) | |
add710ea JR |
2720 | goto force_ro_fail; |
2721 | ||
2722 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && | |
2723 | card->ext_csd.boot_ro_lockable) { | |
88187398 | 2724 | umode_t mode; |
add710ea JR |
2725 | |
2726 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS) | |
2727 | mode = S_IRUGO; | |
2728 | else | |
2729 | mode = S_IRUGO | S_IWUSR; | |
2730 | ||
2731 | md->power_ro_lock.show = power_ro_lock_show; | |
2732 | md->power_ro_lock.store = power_ro_lock_store; | |
00d9ac08 | 2733 | sysfs_attr_init(&md->power_ro_lock.attr); |
add710ea JR |
2734 | md->power_ro_lock.attr.mode = mode; |
2735 | md->power_ro_lock.attr.name = | |
2736 | "ro_lock_until_next_power_on"; | |
2737 | ret = device_create_file(disk_to_dev(md->disk), | |
2738 | &md->power_ro_lock); | |
2739 | if (ret) | |
2740 | goto power_ro_lock_fail; | |
2741 | } | |
2742 | return ret; | |
2743 | ||
2744 | power_ro_lock_fail: | |
2745 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
2746 | force_ro_fail: | |
2747 | del_gendisk(md->disk); | |
371a689f AW |
2748 | |
2749 | return ret; | |
2750 | } | |
2751 | ||
627c3ccf LW |
2752 | #ifdef CONFIG_DEBUG_FS |
2753 | ||
2754 | static int mmc_dbg_card_status_get(void *data, u64 *val) | |
2755 | { | |
2756 | struct mmc_card *card = data; | |
2757 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2758 | struct mmc_queue *mq = &md->queue; | |
2759 | struct request *req; | |
2760 | int ret; | |
2761 | ||
2762 | /* Ask the block layer about the card status */ | |
ff005a06 | 2763 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2764 | if (IS_ERR(req)) |
2765 | return PTR_ERR(req); | |
627c3ccf LW |
2766 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS; |
2767 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2768 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
2769 | if (ret >= 0) { | |
2770 | *val = ret; | |
2771 | ret = 0; | |
2772 | } | |
34c089e8 | 2773 | blk_put_request(req); |
627c3ccf LW |
2774 | |
2775 | return ret; | |
2776 | } | |
2777 | DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get, | |
2778 | NULL, "%08llx\n"); | |
2779 | ||
2780 | /* That is two digits * 512 + 1 for newline */ | |
2781 | #define EXT_CSD_STR_LEN 1025 | |
2782 | ||
2783 | static int mmc_ext_csd_open(struct inode *inode, struct file *filp) | |
2784 | { | |
2785 | struct mmc_card *card = inode->i_private; | |
2786 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2787 | struct mmc_queue *mq = &md->queue; | |
2788 | struct request *req; | |
2789 | char *buf; | |
2790 | ssize_t n = 0; | |
2791 | u8 *ext_csd; | |
2792 | int err, i; | |
2793 | ||
2794 | buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL); | |
2795 | if (!buf) | |
2796 | return -ENOMEM; | |
2797 | ||
2798 | /* Ask the block layer for the EXT CSD */ | |
ff005a06 | 2799 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2800 | if (IS_ERR(req)) { |
2801 | err = PTR_ERR(req); | |
2802 | goto out_free; | |
2803 | } | |
627c3ccf LW |
2804 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD; |
2805 | req_to_mmc_queue_req(req)->drv_op_data = &ext_csd; | |
2806 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2807 | err = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 2808 | blk_put_request(req); |
627c3ccf LW |
2809 | if (err) { |
2810 | pr_err("FAILED %d\n", err); | |
2811 | goto out_free; | |
2812 | } | |
2813 | ||
2814 | for (i = 0; i < 512; i++) | |
2815 | n += sprintf(buf + n, "%02x", ext_csd[i]); | |
2816 | n += sprintf(buf + n, "\n"); | |
2817 | ||
2818 | if (n != EXT_CSD_STR_LEN) { | |
2819 | err = -EINVAL; | |
0be55579 | 2820 | kfree(ext_csd); |
627c3ccf LW |
2821 | goto out_free; |
2822 | } | |
2823 | ||
2824 | filp->private_data = buf; | |
2825 | kfree(ext_csd); | |
2826 | return 0; | |
2827 | ||
2828 | out_free: | |
2829 | kfree(buf); | |
2830 | return err; | |
2831 | } | |
2832 | ||
2833 | static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf, | |
2834 | size_t cnt, loff_t *ppos) | |
2835 | { | |
2836 | char *buf = filp->private_data; | |
2837 | ||
2838 | return simple_read_from_buffer(ubuf, cnt, ppos, | |
2839 | buf, EXT_CSD_STR_LEN); | |
2840 | } | |
2841 | ||
2842 | static int mmc_ext_csd_release(struct inode *inode, struct file *file) | |
2843 | { | |
2844 | kfree(file->private_data); | |
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | static const struct file_operations mmc_dbg_ext_csd_fops = { | |
2849 | .open = mmc_ext_csd_open, | |
2850 | .read = mmc_ext_csd_read, | |
2851 | .release = mmc_ext_csd_release, | |
2852 | .llseek = default_llseek, | |
2853 | }; | |
2854 | ||
f9f0da98 | 2855 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2856 | { |
2857 | struct dentry *root; | |
2858 | ||
2859 | if (!card->debugfs_root) | |
2860 | return 0; | |
2861 | ||
2862 | root = card->debugfs_root; | |
2863 | ||
2864 | if (mmc_card_mmc(card) || mmc_card_sd(card)) { | |
f9f0da98 AH |
2865 | md->status_dentry = |
2866 | debugfs_create_file("status", S_IRUSR, root, card, | |
2867 | &mmc_dbg_card_status_fops); | |
2868 | if (!md->status_dentry) | |
627c3ccf LW |
2869 | return -EIO; |
2870 | } | |
2871 | ||
2872 | if (mmc_card_mmc(card)) { | |
f9f0da98 AH |
2873 | md->ext_csd_dentry = |
2874 | debugfs_create_file("ext_csd", S_IRUSR, root, card, | |
2875 | &mmc_dbg_ext_csd_fops); | |
2876 | if (!md->ext_csd_dentry) | |
627c3ccf LW |
2877 | return -EIO; |
2878 | } | |
2879 | ||
2880 | return 0; | |
2881 | } | |
2882 | ||
f9f0da98 AH |
2883 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2884 | struct mmc_blk_data *md) | |
2885 | { | |
2886 | if (!card->debugfs_root) | |
2887 | return; | |
2888 | ||
2889 | if (!IS_ERR_OR_NULL(md->status_dentry)) { | |
2890 | debugfs_remove(md->status_dentry); | |
2891 | md->status_dentry = NULL; | |
2892 | } | |
2893 | ||
2894 | if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) { | |
2895 | debugfs_remove(md->ext_csd_dentry); | |
2896 | md->ext_csd_dentry = NULL; | |
2897 | } | |
2898 | } | |
627c3ccf LW |
2899 | |
2900 | #else | |
2901 | ||
f9f0da98 | 2902 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2903 | { |
2904 | return 0; | |
2905 | } | |
2906 | ||
f9f0da98 AH |
2907 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2908 | struct mmc_blk_data *md) | |
2909 | { | |
2910 | } | |
2911 | ||
627c3ccf LW |
2912 | #endif /* CONFIG_DEBUG_FS */ |
2913 | ||
96541bac | 2914 | static int mmc_blk_probe(struct mmc_card *card) |
1da177e4 | 2915 | { |
371a689f | 2916 | struct mmc_blk_data *md, *part_md; |
a7bbb573 PO |
2917 | char cap_str[10]; |
2918 | ||
912490db PO |
2919 | /* |
2920 | * Check that the card supports the command class(es) we need. | |
2921 | */ | |
2922 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
2923 | return -ENODEV; |
2924 | ||
8c7cdbf9 | 2925 | mmc_fixup_device(card, mmc_blk_fixups); |
5204d00f | 2926 | |
1da177e4 | 2927 | md = mmc_blk_alloc(card); |
304419d8 | 2928 | if (IS_ERR(md)) |
1da177e4 LT |
2929 | return PTR_ERR(md); |
2930 | ||
b9f28d86 | 2931 | string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, |
a7bbb573 | 2932 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2933 | pr_info("%s: %s %s %s %s\n", |
1da177e4 | 2934 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 2935 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 2936 | |
371a689f AW |
2937 | if (mmc_blk_alloc_parts(card, md)) |
2938 | goto out; | |
2939 | ||
96541bac | 2940 | dev_set_drvdata(&card->dev, md); |
6f60c222 | 2941 | |
371a689f AW |
2942 | if (mmc_add_disk(md)) |
2943 | goto out; | |
2944 | ||
2945 | list_for_each_entry(part_md, &md->part, part) { | |
2946 | if (mmc_add_disk(part_md)) | |
2947 | goto out; | |
2948 | } | |
e94cfef6 | 2949 | |
627c3ccf | 2950 | /* Add two debugfs entries */ |
f9f0da98 | 2951 | mmc_blk_add_debugfs(card, md); |
627c3ccf | 2952 | |
e94cfef6 UH |
2953 | pm_runtime_set_autosuspend_delay(&card->dev, 3000); |
2954 | pm_runtime_use_autosuspend(&card->dev); | |
2955 | ||
2956 | /* | |
2957 | * Don't enable runtime PM for SD-combo cards here. Leave that | |
2958 | * decision to be taken during the SDIO init sequence instead. | |
2959 | */ | |
2960 | if (card->type != MMC_TYPE_SD_COMBO) { | |
2961 | pm_runtime_set_active(&card->dev); | |
2962 | pm_runtime_enable(&card->dev); | |
2963 | } | |
2964 | ||
1da177e4 LT |
2965 | return 0; |
2966 | ||
2967 | out: | |
371a689f AW |
2968 | mmc_blk_remove_parts(card, md); |
2969 | mmc_blk_remove_req(md); | |
5865f287 | 2970 | return 0; |
1da177e4 LT |
2971 | } |
2972 | ||
96541bac | 2973 | static void mmc_blk_remove(struct mmc_card *card) |
1da177e4 | 2974 | { |
96541bac | 2975 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 | 2976 | |
f9f0da98 | 2977 | mmc_blk_remove_debugfs(card, md); |
371a689f | 2978 | mmc_blk_remove_parts(card, md); |
e94cfef6 | 2979 | pm_runtime_get_sync(&card->dev); |
65f9e20e SL |
2980 | if (md->part_curr != md->part_type) { |
2981 | mmc_claim_host(card->host); | |
2982 | mmc_blk_part_switch(card, md->part_type); | |
2983 | mmc_release_host(card->host); | |
2984 | } | |
e94cfef6 UH |
2985 | if (card->type != MMC_TYPE_SD_COMBO) |
2986 | pm_runtime_disable(&card->dev); | |
2987 | pm_runtime_put_noidle(&card->dev); | |
371a689f | 2988 | mmc_blk_remove_req(md); |
96541bac | 2989 | dev_set_drvdata(&card->dev, NULL); |
1da177e4 LT |
2990 | } |
2991 | ||
96541bac | 2992 | static int _mmc_blk_suspend(struct mmc_card *card) |
1da177e4 | 2993 | { |
371a689f | 2994 | struct mmc_blk_data *part_md; |
96541bac | 2995 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 LT |
2996 | |
2997 | if (md) { | |
2998 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
2999 | list_for_each_entry(part_md, &md->part, part) { |
3000 | mmc_queue_suspend(&part_md->queue); | |
3001 | } | |
1da177e4 LT |
3002 | } |
3003 | return 0; | |
3004 | } | |
3005 | ||
96541bac | 3006 | static void mmc_blk_shutdown(struct mmc_card *card) |
76287748 | 3007 | { |
96541bac | 3008 | _mmc_blk_suspend(card); |
76287748 UH |
3009 | } |
3010 | ||
0967edc6 UH |
3011 | #ifdef CONFIG_PM_SLEEP |
3012 | static int mmc_blk_suspend(struct device *dev) | |
76287748 | 3013 | { |
96541bac UH |
3014 | struct mmc_card *card = mmc_dev_to_card(dev); |
3015 | ||
3016 | return _mmc_blk_suspend(card); | |
76287748 UH |
3017 | } |
3018 | ||
0967edc6 | 3019 | static int mmc_blk_resume(struct device *dev) |
1da177e4 | 3020 | { |
371a689f | 3021 | struct mmc_blk_data *part_md; |
fc95e30b | 3022 | struct mmc_blk_data *md = dev_get_drvdata(dev); |
1da177e4 LT |
3023 | |
3024 | if (md) { | |
371a689f AW |
3025 | /* |
3026 | * Resume involves the card going into idle state, | |
3027 | * so current partition is always the main one. | |
3028 | */ | |
3029 | md->part_curr = md->part_type; | |
1da177e4 | 3030 | mmc_queue_resume(&md->queue); |
371a689f AW |
3031 | list_for_each_entry(part_md, &md->part, part) { |
3032 | mmc_queue_resume(&part_md->queue); | |
3033 | } | |
1da177e4 LT |
3034 | } |
3035 | return 0; | |
3036 | } | |
1da177e4 LT |
3037 | #endif |
3038 | ||
0967edc6 UH |
3039 | static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume); |
3040 | ||
96541bac UH |
3041 | static struct mmc_driver mmc_driver = { |
3042 | .drv = { | |
3043 | .name = "mmcblk", | |
3044 | .pm = &mmc_blk_pm_ops, | |
3045 | }, | |
1da177e4 LT |
3046 | .probe = mmc_blk_probe, |
3047 | .remove = mmc_blk_remove, | |
76287748 | 3048 | .shutdown = mmc_blk_shutdown, |
1da177e4 LT |
3049 | }; |
3050 | ||
3051 | static int __init mmc_blk_init(void) | |
3052 | { | |
9d4e98e9 | 3053 | int res; |
1da177e4 | 3054 | |
97548575 LW |
3055 | res = bus_register(&mmc_rpmb_bus_type); |
3056 | if (res < 0) { | |
3057 | pr_err("mmcblk: could not register RPMB bus type\n"); | |
3058 | return res; | |
3059 | } | |
3060 | res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb"); | |
3061 | if (res < 0) { | |
3062 | pr_err("mmcblk: failed to allocate rpmb chrdev region\n"); | |
3063 | goto out_bus_unreg; | |
3064 | } | |
3065 | ||
5e71b7a6 OJ |
3066 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
3067 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
3068 | ||
a26eba61 | 3069 | max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors); |
5e71b7a6 | 3070 | |
fe6b4c88 PO |
3071 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
3072 | if (res) | |
97548575 | 3073 | goto out_chrdev_unreg; |
1da177e4 | 3074 | |
9d4e98e9 AM |
3075 | res = mmc_register_driver(&mmc_driver); |
3076 | if (res) | |
97548575 | 3077 | goto out_blkdev_unreg; |
1da177e4 | 3078 | |
9d4e98e9 | 3079 | return 0; |
97548575 LW |
3080 | |
3081 | out_blkdev_unreg: | |
9d4e98e9 | 3082 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 LW |
3083 | out_chrdev_unreg: |
3084 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); | |
3085 | out_bus_unreg: | |
3086 | bus_unregister(&mmc_rpmb_bus_type); | |
1da177e4 LT |
3087 | return res; |
3088 | } | |
3089 | ||
3090 | static void __exit mmc_blk_exit(void) | |
3091 | { | |
3092 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 3093 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 | 3094 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); |
d0a0852b | 3095 | bus_unregister(&mmc_rpmb_bus_type); |
1da177e4 LT |
3096 | } |
3097 | ||
3098 | module_init(mmc_blk_init); | |
3099 | module_exit(mmc_blk_exit); | |
3100 | ||
3101 | MODULE_LICENSE("GPL"); | |
3102 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
3103 |