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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Block driver for media (i.e., flash cards) | |
3 | * | |
4 | * Copyright 2002 Hewlett-Packard Company | |
979ce720 | 5 | * Copyright 2005-2008 Pierre Ossman |
1da177e4 LT |
6 | * |
7 | * Use consistent with the GNU GPL is permitted, | |
8 | * provided that this copyright notice is | |
9 | * preserved in its entirety in all copies and derived works. | |
10 | * | |
11 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |
12 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |
13 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |
14 | * | |
15 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |
16 | * | |
17 | * Author: Andrew Christian | |
18 | * 28 May 2002 | |
19 | */ | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/fs.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/hdreg.h> | |
29 | #include <linux/kdev_t.h> | |
30 | #include <linux/blkdev.h> | |
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 | 73 | #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) |
a0e95766 | 74 | #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) |
6a7a6b45 | 75 | |
d3df0465 | 76 | #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \ |
ce39f9d1 | 77 | (rq_data_dir(req) == WRITE)) |
5e71b7a6 | 78 | static DEFINE_MUTEX(block_mutex); |
6b0b6285 | 79 | |
1da177e4 | 80 | /* |
5e71b7a6 OJ |
81 | * The defaults come from config options but can be overriden by module |
82 | * or bootarg options. | |
1da177e4 | 83 | */ |
5e71b7a6 | 84 | static int perdev_minors = CONFIG_MMC_BLOCK_MINORS; |
1dff3144 | 85 | |
5e71b7a6 OJ |
86 | /* |
87 | * We've only got one major, so number of mmcblk devices is | |
a26eba61 | 88 | * limited to (1 << 20) / number of minors per device. It is also |
b10fa99e | 89 | * limited by the MAX_DEVICES below. |
5e71b7a6 OJ |
90 | */ |
91 | static int max_devices; | |
92 | ||
a26eba61 BH |
93 | #define MAX_DEVICES 256 |
94 | ||
b10fa99e | 95 | static DEFINE_IDA(mmc_blk_ida); |
97548575 | 96 | static DEFINE_IDA(mmc_rpmb_ida); |
1da177e4 | 97 | |
1da177e4 LT |
98 | /* |
99 | * There is one mmc_blk_data per slot. | |
100 | */ | |
101 | struct mmc_blk_data { | |
307d8e6f | 102 | struct device *parent; |
1da177e4 LT |
103 | struct gendisk *disk; |
104 | struct mmc_queue queue; | |
371a689f | 105 | struct list_head part; |
97548575 | 106 | struct list_head rpmbs; |
1da177e4 | 107 | |
d0c97cfb AW |
108 | unsigned int flags; |
109 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
110 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
111 | ||
1da177e4 | 112 | unsigned int usage; |
a6f6c96b | 113 | unsigned int read_only; |
371a689f | 114 | unsigned int part_type; |
67716327 AH |
115 | unsigned int reset_done; |
116 | #define MMC_BLK_READ BIT(0) | |
117 | #define MMC_BLK_WRITE BIT(1) | |
118 | #define MMC_BLK_DISCARD BIT(2) | |
119 | #define MMC_BLK_SECDISCARD BIT(3) | |
1e8e55b6 | 120 | #define MMC_BLK_CQE_RECOVERY BIT(4) |
371a689f AW |
121 | |
122 | /* | |
123 | * Only set in main mmc_blk_data associated | |
fc95e30b | 124 | * with mmc_card with dev_set_drvdata, and keeps |
371a689f AW |
125 | * track of the current selected device partition. |
126 | */ | |
127 | unsigned int part_curr; | |
128 | struct device_attribute force_ro; | |
add710ea JR |
129 | struct device_attribute power_ro_lock; |
130 | int area_type; | |
f9f0da98 AH |
131 | |
132 | /* debugfs files (only in main mmc_blk_data) */ | |
133 | struct dentry *status_dentry; | |
134 | struct dentry *ext_csd_dentry; | |
1da177e4 LT |
135 | }; |
136 | ||
97548575 LW |
137 | /* Device type for RPMB character devices */ |
138 | static dev_t mmc_rpmb_devt; | |
139 | ||
140 | /* Bus type for RPMB character devices */ | |
141 | static struct bus_type mmc_rpmb_bus_type = { | |
142 | .name = "mmc_rpmb", | |
143 | }; | |
144 | ||
145 | /** | |
146 | * struct mmc_rpmb_data - special RPMB device type for these areas | |
147 | * @dev: the device for the RPMB area | |
148 | * @chrdev: character device for the RPMB area | |
149 | * @id: unique device ID number | |
150 | * @part_index: partition index (0 on first) | |
151 | * @md: parent MMC block device | |
152 | * @node: list item, so we can put this device on a list | |
153 | */ | |
154 | struct mmc_rpmb_data { | |
155 | struct device dev; | |
156 | struct cdev chrdev; | |
157 | int id; | |
158 | unsigned int part_index; | |
159 | struct mmc_blk_data *md; | |
160 | struct list_head node; | |
161 | }; | |
162 | ||
a621aaed | 163 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 164 | |
5e71b7a6 OJ |
165 | module_param(perdev_minors, int, 0444); |
166 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
167 | ||
8d1e977d | 168 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 169 | unsigned int part_type); |
511ce378 BW |
170 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
171 | struct mmc_card *card, | |
172 | int disable_multi, | |
173 | struct mmc_queue *mq); | |
174 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq); | |
cdf8a6fb | 175 | |
1da177e4 LT |
176 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
177 | { | |
178 | struct mmc_blk_data *md; | |
179 | ||
a621aaed | 180 | mutex_lock(&open_lock); |
1da177e4 LT |
181 | md = disk->private_data; |
182 | if (md && md->usage == 0) | |
183 | md = NULL; | |
184 | if (md) | |
185 | md->usage++; | |
a621aaed | 186 | mutex_unlock(&open_lock); |
1da177e4 LT |
187 | |
188 | return md; | |
189 | } | |
190 | ||
371a689f AW |
191 | static inline int mmc_get_devidx(struct gendisk *disk) |
192 | { | |
382c55f8 | 193 | int devidx = disk->first_minor / perdev_minors; |
371a689f AW |
194 | return devidx; |
195 | } | |
196 | ||
1da177e4 LT |
197 | static void mmc_blk_put(struct mmc_blk_data *md) |
198 | { | |
a621aaed | 199 | mutex_lock(&open_lock); |
1da177e4 LT |
200 | md->usage--; |
201 | if (md->usage == 0) { | |
371a689f | 202 | int devidx = mmc_get_devidx(md->disk); |
41e3efd0 | 203 | blk_put_queue(md->queue.queue); |
a04848c7 | 204 | ida_simple_remove(&mmc_blk_ida, devidx); |
1da177e4 | 205 | put_disk(md->disk); |
1da177e4 LT |
206 | kfree(md); |
207 | } | |
a621aaed | 208 | mutex_unlock(&open_lock); |
1da177e4 LT |
209 | } |
210 | ||
add710ea JR |
211 | static ssize_t power_ro_lock_show(struct device *dev, |
212 | struct device_attribute *attr, char *buf) | |
213 | { | |
214 | int ret; | |
215 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
216 | struct mmc_card *card = md->queue.card; | |
217 | int locked = 0; | |
218 | ||
219 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN) | |
220 | locked = 2; | |
221 | else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) | |
222 | locked = 1; | |
223 | ||
224 | ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); | |
225 | ||
9098f84c TW |
226 | mmc_blk_put(md); |
227 | ||
add710ea JR |
228 | return ret; |
229 | } | |
230 | ||
231 | static ssize_t power_ro_lock_store(struct device *dev, | |
232 | struct device_attribute *attr, const char *buf, size_t count) | |
233 | { | |
234 | int ret; | |
235 | struct mmc_blk_data *md, *part_md; | |
0493f6fe LW |
236 | struct mmc_queue *mq; |
237 | struct request *req; | |
add710ea JR |
238 | unsigned long set; |
239 | ||
240 | if (kstrtoul(buf, 0, &set)) | |
241 | return -EINVAL; | |
242 | ||
243 | if (set != 1) | |
244 | return count; | |
245 | ||
246 | md = mmc_blk_get(dev_to_disk(dev)); | |
0493f6fe | 247 | mq = &md->queue; |
add710ea | 248 | |
0493f6fe | 249 | /* Dispatch locking to the block layer */ |
ff005a06 | 250 | req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0); |
fb8e456e AH |
251 | if (IS_ERR(req)) { |
252 | count = PTR_ERR(req); | |
253 | goto out_put; | |
254 | } | |
0493f6fe LW |
255 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; |
256 | blk_execute_rq(mq->queue, NULL, req, 0); | |
257 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 258 | blk_put_request(req); |
add710ea JR |
259 | |
260 | if (!ret) { | |
261 | pr_info("%s: Locking boot partition ro until next power on\n", | |
262 | md->disk->disk_name); | |
263 | set_disk_ro(md->disk, 1); | |
264 | ||
265 | list_for_each_entry(part_md, &md->part, part) | |
266 | if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) { | |
267 | pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name); | |
268 | set_disk_ro(part_md->disk, 1); | |
269 | } | |
270 | } | |
fb8e456e | 271 | out_put: |
add710ea JR |
272 | mmc_blk_put(md); |
273 | return count; | |
274 | } | |
275 | ||
371a689f AW |
276 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
277 | char *buf) | |
278 | { | |
279 | int ret; | |
280 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
281 | ||
0031a98a | 282 | ret = snprintf(buf, PAGE_SIZE, "%d\n", |
371a689f AW |
283 | get_disk_ro(dev_to_disk(dev)) ^ |
284 | md->read_only); | |
285 | mmc_blk_put(md); | |
286 | return ret; | |
287 | } | |
288 | ||
289 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
290 | const char *buf, size_t count) | |
291 | { | |
292 | int ret; | |
293 | char *end; | |
294 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
295 | unsigned long set = simple_strtoul(buf, &end, 0); | |
296 | if (end == buf) { | |
297 | ret = -EINVAL; | |
298 | goto out; | |
299 | } | |
300 | ||
301 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
302 | ret = count; | |
303 | out: | |
304 | mmc_blk_put(md); | |
305 | return ret; | |
306 | } | |
307 | ||
a5a1561f | 308 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 309 | { |
a5a1561f | 310 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
311 | int ret = -ENXIO; |
312 | ||
2a48fc0a | 313 | mutex_lock(&block_mutex); |
1da177e4 LT |
314 | if (md) { |
315 | if (md->usage == 2) | |
a5a1561f | 316 | check_disk_change(bdev); |
1da177e4 | 317 | ret = 0; |
a00fc090 | 318 | |
a5a1561f | 319 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 320 | mmc_blk_put(md); |
a00fc090 | 321 | ret = -EROFS; |
70bb0896 | 322 | } |
1da177e4 | 323 | } |
2a48fc0a | 324 | mutex_unlock(&block_mutex); |
1da177e4 LT |
325 | |
326 | return ret; | |
327 | } | |
328 | ||
db2a144b | 329 | static void mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 330 | { |
a5a1561f | 331 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 332 | |
2a48fc0a | 333 | mutex_lock(&block_mutex); |
1da177e4 | 334 | mmc_blk_put(md); |
2a48fc0a | 335 | mutex_unlock(&block_mutex); |
1da177e4 LT |
336 | } |
337 | ||
338 | static int | |
a885c8c4 | 339 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 340 | { |
a885c8c4 CH |
341 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
342 | geo->heads = 4; | |
343 | geo->sectors = 16; | |
344 | return 0; | |
1da177e4 LT |
345 | } |
346 | ||
cb87ea28 JC |
347 | struct mmc_blk_ioc_data { |
348 | struct mmc_ioc_cmd ic; | |
349 | unsigned char *buf; | |
350 | u64 buf_bytes; | |
97548575 | 351 | struct mmc_rpmb_data *rpmb; |
cb87ea28 JC |
352 | }; |
353 | ||
354 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
355 | struct mmc_ioc_cmd __user *user) | |
356 | { | |
357 | struct mmc_blk_ioc_data *idata; | |
358 | int err; | |
359 | ||
1ff8950c | 360 | idata = kmalloc(sizeof(*idata), GFP_KERNEL); |
cb87ea28 JC |
361 | if (!idata) { |
362 | err = -ENOMEM; | |
aea253ec | 363 | goto out; |
cb87ea28 JC |
364 | } |
365 | ||
366 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
367 | err = -EFAULT; | |
aea253ec | 368 | goto idata_err; |
cb87ea28 JC |
369 | } |
370 | ||
371 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
372 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
373 | err = -EOVERFLOW; | |
aea253ec | 374 | goto idata_err; |
cb87ea28 JC |
375 | } |
376 | ||
bfe5b1b1 VV |
377 | if (!idata->buf_bytes) { |
378 | idata->buf = NULL; | |
4d6144de | 379 | return idata; |
bfe5b1b1 | 380 | } |
4d6144de | 381 | |
97a0c313 ME |
382 | idata->buf = memdup_user((void __user *)(unsigned long) |
383 | idata->ic.data_ptr, idata->buf_bytes); | |
384 | if (IS_ERR(idata->buf)) { | |
385 | err = PTR_ERR(idata->buf); | |
aea253ec | 386 | goto idata_err; |
cb87ea28 JC |
387 | } |
388 | ||
cb87ea28 JC |
389 | return idata; |
390 | ||
aea253ec | 391 | idata_err: |
cb87ea28 | 392 | kfree(idata); |
aea253ec | 393 | out: |
cb87ea28 | 394 | return ERR_PTR(err); |
cb87ea28 JC |
395 | } |
396 | ||
a5f5774c JH |
397 | static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, |
398 | struct mmc_blk_ioc_data *idata) | |
399 | { | |
400 | struct mmc_ioc_cmd *ic = &idata->ic; | |
401 | ||
402 | if (copy_to_user(&(ic_ptr->response), ic->response, | |
403 | sizeof(ic->response))) | |
404 | return -EFAULT; | |
405 | ||
406 | if (!idata->ic.write_flag) { | |
407 | if (copy_to_user((void __user *)(unsigned long)ic->data_ptr, | |
408 | idata->buf, idata->buf_bytes)) | |
409 | return -EFAULT; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
a0d4c7eb CJ |
415 | static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, |
416 | u32 *resp_errs) | |
417 | { | |
418 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); | |
419 | int err = 0; | |
420 | u32 status; | |
421 | ||
422 | do { | |
423 | bool done = time_after(jiffies, timeout); | |
424 | ||
425 | err = __mmc_send_status(card, &status, 5); | |
426 | if (err) { | |
427 | dev_err(mmc_dev(card->host), | |
428 | "error %d requesting status\n", err); | |
429 | return err; | |
430 | } | |
431 | ||
432 | /* Accumulate any response error bits seen */ | |
433 | if (resp_errs) | |
434 | *resp_errs |= status; | |
435 | ||
436 | /* | |
437 | * Timeout if the device never becomes ready for data and never | |
438 | * leaves the program state. | |
439 | */ | |
440 | if (done) { | |
441 | dev_err(mmc_dev(card->host), | |
442 | "Card stuck in wrong state! %s status: %#x\n", | |
443 | __func__, status); | |
444 | return -ETIMEDOUT; | |
445 | } | |
40c96853 | 446 | } while (!mmc_ready_for_data(status)); |
a0d4c7eb CJ |
447 | |
448 | return err; | |
449 | } | |
450 | ||
a5f5774c JH |
451 | static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, |
452 | struct mmc_blk_ioc_data *idata) | |
cb87ea28 | 453 | { |
a44f7cb9 | 454 | struct mmc_command cmd = {}, sbc = {}; |
c7836d15 MY |
455 | struct mmc_data data = {}; |
456 | struct mmc_request mrq = {}; | |
cb87ea28 JC |
457 | struct scatterlist sg; |
458 | int err; | |
97548575 | 459 | unsigned int target_part; |
cb87ea28 | 460 | |
a5f5774c JH |
461 | if (!card || !md || !idata) |
462 | return -EINVAL; | |
cb87ea28 | 463 | |
97548575 LW |
464 | /* |
465 | * The RPMB accesses comes in from the character device, so we | |
466 | * need to target these explicitly. Else we just target the | |
467 | * partition type for the block device the ioctl() was issued | |
468 | * on. | |
469 | */ | |
470 | if (idata->rpmb) { | |
471 | /* Support multiple RPMB partitions */ | |
472 | target_part = idata->rpmb->part_index; | |
473 | target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB; | |
474 | } else { | |
475 | target_part = md->part_type; | |
476 | } | |
8d1e977d | 477 | |
4d6144de JR |
478 | cmd.opcode = idata->ic.opcode; |
479 | cmd.arg = idata->ic.arg; | |
480 | cmd.flags = idata->ic.flags; | |
481 | ||
482 | if (idata->buf_bytes) { | |
483 | data.sg = &sg; | |
484 | data.sg_len = 1; | |
485 | data.blksz = idata->ic.blksz; | |
486 | data.blocks = idata->ic.blocks; | |
487 | ||
488 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
489 | ||
490 | if (idata->ic.write_flag) | |
491 | data.flags = MMC_DATA_WRITE; | |
492 | else | |
493 | data.flags = MMC_DATA_READ; | |
494 | ||
495 | /* data.flags must already be set before doing this. */ | |
496 | mmc_set_data_timeout(&data, card); | |
497 | ||
498 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
499 | if (idata->ic.data_timeout_ns) | |
500 | data.timeout_ns = idata->ic.data_timeout_ns; | |
501 | ||
502 | if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { | |
503 | /* | |
504 | * Pretend this is a data transfer and rely on the | |
505 | * host driver to compute timeout. When all host | |
506 | * drivers support cmd.cmd_timeout for R1B, this | |
507 | * can be changed to: | |
508 | * | |
509 | * mrq.data = NULL; | |
510 | * cmd.cmd_timeout = idata->ic.cmd_timeout_ms; | |
511 | */ | |
512 | data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000; | |
513 | } | |
514 | ||
515 | mrq.data = &data; | |
516 | } | |
517 | ||
518 | mrq.cmd = &cmd; | |
519 | ||
97548575 | 520 | err = mmc_blk_part_switch(card, target_part); |
8d1e977d | 521 | if (err) |
a5f5774c | 522 | return err; |
8d1e977d | 523 | |
cb87ea28 JC |
524 | if (idata->ic.is_acmd) { |
525 | err = mmc_app_cmd(card->host, card); | |
526 | if (err) | |
a5f5774c | 527 | return err; |
cb87ea28 JC |
528 | } |
529 | ||
97548575 | 530 | if (idata->rpmb) { |
a44f7cb9 WS |
531 | sbc.opcode = MMC_SET_BLOCK_COUNT; |
532 | /* | |
533 | * We don't do any blockcount validation because the max size | |
534 | * may be increased by a future standard. We just copy the | |
535 | * 'Reliable Write' bit here. | |
536 | */ | |
537 | sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31)); | |
538 | sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
539 | mrq.sbc = &sbc; | |
8d1e977d LP |
540 | } |
541 | ||
a82e484e | 542 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) && |
55c2b8b9 UH |
543 | (cmd.opcode == MMC_SWITCH)) |
544 | return mmc_sanitize(card); | |
775a9362 | 545 | |
cb87ea28 JC |
546 | mmc_wait_for_req(card->host, &mrq); |
547 | ||
548 | if (cmd.error) { | |
549 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
550 | __func__, cmd.error); | |
a5f5774c | 551 | return cmd.error; |
cb87ea28 JC |
552 | } |
553 | if (data.error) { | |
554 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
555 | __func__, data.error); | |
a5f5774c | 556 | return data.error; |
cb87ea28 JC |
557 | } |
558 | ||
a0e95766 BS |
559 | /* |
560 | * Make sure the cache of the PARTITION_CONFIG register and | |
561 | * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write | |
562 | * changed it successfully. | |
563 | */ | |
564 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) && | |
565 | (cmd.opcode == MMC_SWITCH)) { | |
566 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); | |
567 | u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg); | |
568 | ||
569 | /* | |
570 | * Update cache so the next mmc_blk_part_switch call operates | |
571 | * on up-to-date data. | |
572 | */ | |
573 | card->ext_csd.part_config = value; | |
574 | main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK; | |
575 | } | |
576 | ||
cb87ea28 JC |
577 | /* |
578 | * According to the SD specs, some commands require a delay after | |
579 | * issuing the command. | |
580 | */ | |
581 | if (idata->ic.postsleep_min_us) | |
582 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
583 | ||
a5f5774c | 584 | memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp)); |
cb87ea28 | 585 | |
a0d4c7eb | 586 | if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) { |
8d1e977d | 587 | /* |
a0d4c7eb | 588 | * Ensure RPMB/R1B command has completed by polling CMD13 |
8d1e977d LP |
589 | * "Send Status". |
590 | */ | |
a0d4c7eb | 591 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, NULL); |
8d1e977d LP |
592 | } |
593 | ||
a5f5774c JH |
594 | return err; |
595 | } | |
596 | ||
2fe20bae | 597 | static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md, |
97548575 LW |
598 | struct mmc_ioc_cmd __user *ic_ptr, |
599 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
600 | { |
601 | struct mmc_blk_ioc_data *idata; | |
3ecd8cf2 | 602 | struct mmc_blk_ioc_data *idatas[1]; |
614f0388 | 603 | struct mmc_queue *mq; |
a5f5774c | 604 | struct mmc_card *card; |
b093410c | 605 | int err = 0, ioc_err = 0; |
614f0388 | 606 | struct request *req; |
a5f5774c JH |
607 | |
608 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); | |
609 | if (IS_ERR(idata)) | |
610 | return PTR_ERR(idata); | |
97548575 LW |
611 | /* This will be NULL on non-RPMB ioctl():s */ |
612 | idata->rpmb = rpmb; | |
a5f5774c | 613 | |
a5f5774c JH |
614 | card = md->queue.card; |
615 | if (IS_ERR(card)) { | |
616 | err = PTR_ERR(card); | |
617 | goto cmd_done; | |
618 | } | |
619 | ||
614f0388 LW |
620 | /* |
621 | * Dispatch the ioctl() into the block request queue. | |
622 | */ | |
623 | mq = &md->queue; | |
624 | req = blk_get_request(mq->queue, | |
ff005a06 | 625 | idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
626 | if (IS_ERR(req)) { |
627 | err = PTR_ERR(req); | |
628 | goto cmd_done; | |
629 | } | |
3ecd8cf2 | 630 | idatas[0] = idata; |
97548575 LW |
631 | req_to_mmc_queue_req(req)->drv_op = |
632 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 633 | req_to_mmc_queue_req(req)->drv_op_data = idatas; |
3ecd8cf2 | 634 | req_to_mmc_queue_req(req)->ioc_count = 1; |
614f0388 | 635 | blk_execute_rq(mq->queue, NULL, req, 0); |
0493f6fe | 636 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
b093410c | 637 | err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata); |
614f0388 | 638 | blk_put_request(req); |
a5f5774c | 639 | |
cb87ea28 | 640 | cmd_done: |
cb87ea28 JC |
641 | kfree(idata->buf); |
642 | kfree(idata); | |
b093410c | 643 | return ioc_err ? ioc_err : err; |
cb87ea28 JC |
644 | } |
645 | ||
2fe20bae | 646 | static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md, |
97548575 LW |
647 | struct mmc_ioc_multi_cmd __user *user, |
648 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
649 | { |
650 | struct mmc_blk_ioc_data **idata = NULL; | |
651 | struct mmc_ioc_cmd __user *cmds = user->cmds; | |
652 | struct mmc_card *card; | |
3ecd8cf2 | 653 | struct mmc_queue *mq; |
b093410c | 654 | int i, err = 0, ioc_err = 0; |
a5f5774c | 655 | __u64 num_of_cmds; |
3ecd8cf2 | 656 | struct request *req; |
a5f5774c JH |
657 | |
658 | if (copy_from_user(&num_of_cmds, &user->num_of_cmds, | |
659 | sizeof(num_of_cmds))) | |
660 | return -EFAULT; | |
661 | ||
aab2ee03 GU |
662 | if (!num_of_cmds) |
663 | return 0; | |
664 | ||
a5f5774c JH |
665 | if (num_of_cmds > MMC_IOC_MAX_CMDS) |
666 | return -EINVAL; | |
667 | ||
668 | idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL); | |
669 | if (!idata) | |
670 | return -ENOMEM; | |
671 | ||
672 | for (i = 0; i < num_of_cmds; i++) { | |
673 | idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]); | |
674 | if (IS_ERR(idata[i])) { | |
675 | err = PTR_ERR(idata[i]); | |
676 | num_of_cmds = i; | |
677 | goto cmd_err; | |
678 | } | |
97548575 LW |
679 | /* This will be NULL on non-RPMB ioctl():s */ |
680 | idata[i]->rpmb = rpmb; | |
a5f5774c JH |
681 | } |
682 | ||
a5f5774c JH |
683 | card = md->queue.card; |
684 | if (IS_ERR(card)) { | |
685 | err = PTR_ERR(card); | |
2fe20bae | 686 | goto cmd_err; |
a5f5774c JH |
687 | } |
688 | ||
a5f5774c | 689 | |
3ecd8cf2 LW |
690 | /* |
691 | * Dispatch the ioctl()s into the block request queue. | |
692 | */ | |
693 | mq = &md->queue; | |
694 | req = blk_get_request(mq->queue, | |
ff005a06 | 695 | idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
696 | if (IS_ERR(req)) { |
697 | err = PTR_ERR(req); | |
698 | goto cmd_err; | |
699 | } | |
97548575 LW |
700 | req_to_mmc_queue_req(req)->drv_op = |
701 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 702 | req_to_mmc_queue_req(req)->drv_op_data = idata; |
3ecd8cf2 LW |
703 | req_to_mmc_queue_req(req)->ioc_count = num_of_cmds; |
704 | blk_execute_rq(mq->queue, NULL, req, 0); | |
0493f6fe | 705 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
a5f5774c JH |
706 | |
707 | /* copy to user if data and response */ | |
b093410c | 708 | for (i = 0; i < num_of_cmds && !err; i++) |
a5f5774c | 709 | err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]); |
a5f5774c | 710 | |
3ecd8cf2 LW |
711 | blk_put_request(req); |
712 | ||
a5f5774c JH |
713 | cmd_err: |
714 | for (i = 0; i < num_of_cmds; i++) { | |
715 | kfree(idata[i]->buf); | |
716 | kfree(idata[i]); | |
717 | } | |
718 | kfree(idata); | |
b093410c | 719 | return ioc_err ? ioc_err : err; |
a5f5774c JH |
720 | } |
721 | ||
61fe0e2b LW |
722 | static int mmc_blk_check_blkdev(struct block_device *bdev) |
723 | { | |
724 | /* | |
725 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
726 | * whole block device, not on a partition. This prevents overspray | |
727 | * between sibling partitions. | |
728 | */ | |
729 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
730 | return -EPERM; | |
731 | return 0; | |
732 | } | |
733 | ||
cb87ea28 JC |
734 | static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, |
735 | unsigned int cmd, unsigned long arg) | |
736 | { | |
2fe20bae | 737 | struct mmc_blk_data *md; |
61fe0e2b LW |
738 | int ret; |
739 | ||
a5f5774c JH |
740 | switch (cmd) { |
741 | case MMC_IOC_CMD: | |
61fe0e2b LW |
742 | ret = mmc_blk_check_blkdev(bdev); |
743 | if (ret) | |
744 | return ret; | |
2fe20bae LW |
745 | md = mmc_blk_get(bdev->bd_disk); |
746 | if (!md) | |
747 | return -EINVAL; | |
748 | ret = mmc_blk_ioctl_cmd(md, | |
97548575 LW |
749 | (struct mmc_ioc_cmd __user *)arg, |
750 | NULL); | |
2fe20bae LW |
751 | mmc_blk_put(md); |
752 | return ret; | |
a5f5774c | 753 | case MMC_IOC_MULTI_CMD: |
61fe0e2b LW |
754 | ret = mmc_blk_check_blkdev(bdev); |
755 | if (ret) | |
756 | return ret; | |
2fe20bae LW |
757 | md = mmc_blk_get(bdev->bd_disk); |
758 | if (!md) | |
759 | return -EINVAL; | |
760 | ret = mmc_blk_ioctl_multi_cmd(md, | |
97548575 LW |
761 | (struct mmc_ioc_multi_cmd __user *)arg, |
762 | NULL); | |
2fe20bae LW |
763 | mmc_blk_put(md); |
764 | return ret; | |
a5f5774c JH |
765 | default: |
766 | return -EINVAL; | |
767 | } | |
cb87ea28 JC |
768 | } |
769 | ||
770 | #ifdef CONFIG_COMPAT | |
771 | static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
772 | unsigned int cmd, unsigned long arg) | |
773 | { | |
774 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
775 | } | |
776 | #endif | |
777 | ||
83d5cde4 | 778 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
779 | .open = mmc_blk_open, |
780 | .release = mmc_blk_release, | |
a885c8c4 | 781 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 782 | .owner = THIS_MODULE, |
cb87ea28 JC |
783 | .ioctl = mmc_blk_ioctl, |
784 | #ifdef CONFIG_COMPAT | |
785 | .compat_ioctl = mmc_blk_compat_ioctl, | |
786 | #endif | |
1da177e4 LT |
787 | }; |
788 | ||
025e3d5f AH |
789 | static int mmc_blk_part_switch_pre(struct mmc_card *card, |
790 | unsigned int part_type) | |
791 | { | |
792 | int ret = 0; | |
793 | ||
794 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
795 | if (card->ext_csd.cmdq_en) { | |
796 | ret = mmc_cmdq_disable(card); | |
797 | if (ret) | |
798 | return ret; | |
799 | } | |
800 | mmc_retune_pause(card->host); | |
801 | } | |
802 | ||
803 | return ret; | |
804 | } | |
805 | ||
806 | static int mmc_blk_part_switch_post(struct mmc_card *card, | |
807 | unsigned int part_type) | |
808 | { | |
809 | int ret = 0; | |
810 | ||
811 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
812 | mmc_retune_unpause(card->host); | |
813 | if (card->reenable_cmdq && !card->ext_csd.cmdq_en) | |
814 | ret = mmc_cmdq_enable(card); | |
815 | } | |
816 | ||
817 | return ret; | |
818 | } | |
819 | ||
371a689f | 820 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 821 | unsigned int part_type) |
371a689f | 822 | { |
025e3d5f | 823 | int ret = 0; |
fc95e30b | 824 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); |
0d7d85ca | 825 | |
1f797edc | 826 | if (main_md->part_curr == part_type) |
371a689f AW |
827 | return 0; |
828 | ||
829 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
830 | u8 part_config = card->ext_csd.part_config; |
831 | ||
1f797edc | 832 | ret = mmc_blk_part_switch_pre(card, part_type); |
025e3d5f AH |
833 | if (ret) |
834 | return ret; | |
57da0c04 | 835 | |
0d7d85ca | 836 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
1f797edc | 837 | part_config |= part_type; |
371a689f AW |
838 | |
839 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 840 | EXT_CSD_PART_CONFIG, part_config, |
371a689f | 841 | card->ext_csd.part_time); |
57da0c04 | 842 | if (ret) { |
1f797edc | 843 | mmc_blk_part_switch_post(card, part_type); |
371a689f | 844 | return ret; |
57da0c04 | 845 | } |
0d7d85ca AH |
846 | |
847 | card->ext_csd.part_config = part_config; | |
57da0c04 | 848 | |
025e3d5f | 849 | ret = mmc_blk_part_switch_post(card, main_md->part_curr); |
67716327 | 850 | } |
371a689f | 851 | |
1f797edc | 852 | main_md->part_curr = part_type; |
025e3d5f | 853 | return ret; |
371a689f AW |
854 | } |
855 | ||
169f03a0 | 856 | static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) |
ec5a19dd PO |
857 | { |
858 | int err; | |
051913da BD |
859 | u32 result; |
860 | __be32 *blocks; | |
ec5a19dd | 861 | |
c7836d15 MY |
862 | struct mmc_request mrq = {}; |
863 | struct mmc_command cmd = {}; | |
864 | struct mmc_data data = {}; | |
ec5a19dd PO |
865 | |
866 | struct scatterlist sg; | |
867 | ||
ec5a19dd PO |
868 | cmd.opcode = MMC_APP_CMD; |
869 | cmd.arg = card->rca << 16; | |
7213d175 | 870 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
871 | |
872 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 | 873 | if (err) |
169f03a0 | 874 | return err; |
7213d175 | 875 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) |
169f03a0 | 876 | return -EIO; |
ec5a19dd PO |
877 | |
878 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
879 | ||
880 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
881 | cmd.arg = 0; | |
7213d175 | 882 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 883 | |
ec5a19dd PO |
884 | data.blksz = 4; |
885 | data.blocks = 1; | |
886 | data.flags = MMC_DATA_READ; | |
887 | data.sg = &sg; | |
888 | data.sg_len = 1; | |
d380443c | 889 | mmc_set_data_timeout(&data, card); |
ec5a19dd | 890 | |
ec5a19dd PO |
891 | mrq.cmd = &cmd; |
892 | mrq.data = &data; | |
893 | ||
051913da BD |
894 | blocks = kmalloc(4, GFP_KERNEL); |
895 | if (!blocks) | |
169f03a0 | 896 | return -ENOMEM; |
051913da BD |
897 | |
898 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
899 | |
900 | mmc_wait_for_req(card->host, &mrq); | |
901 | ||
051913da BD |
902 | result = ntohl(*blocks); |
903 | kfree(blocks); | |
904 | ||
17b0429d | 905 | if (cmd.error || data.error) |
169f03a0 LW |
906 | return -EIO; |
907 | ||
908 | *written_blocks = result; | |
ec5a19dd | 909 | |
169f03a0 | 910 | return 0; |
ec5a19dd PO |
911 | } |
912 | ||
92c0a0cc AH |
913 | static unsigned int mmc_blk_clock_khz(struct mmc_host *host) |
914 | { | |
915 | if (host->actual_clock) | |
916 | return host->actual_clock / 1000; | |
917 | ||
918 | /* Clock may be subject to a divisor, fudge it by a factor of 2. */ | |
919 | if (host->ios.clock) | |
920 | return host->ios.clock / 2000; | |
921 | ||
922 | /* How can there be no clock */ | |
923 | WARN_ON_ONCE(1); | |
924 | return 100; /* 100 kHz is minimum possible value */ | |
925 | } | |
926 | ||
927 | static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host, | |
928 | struct mmc_data *data) | |
929 | { | |
930 | unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); | |
931 | unsigned int khz; | |
932 | ||
933 | if (data->timeout_clks) { | |
934 | khz = mmc_blk_clock_khz(host); | |
935 | ms += DIV_ROUND_UP(data->timeout_clks, khz); | |
936 | } | |
937 | ||
938 | return ms; | |
939 | } | |
940 | ||
67716327 AH |
941 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
942 | int type) | |
943 | { | |
944 | int err; | |
945 | ||
946 | if (md->reset_done & type) | |
947 | return -EEXIST; | |
948 | ||
949 | md->reset_done |= type; | |
950 | err = mmc_hw_reset(host); | |
951 | /* Ensure we switch back to the correct partition */ | |
952 | if (err != -EOPNOTSUPP) { | |
fc95e30b UH |
953 | struct mmc_blk_data *main_md = |
954 | dev_get_drvdata(&host->card->dev); | |
67716327 AH |
955 | int part_err; |
956 | ||
957 | main_md->part_curr = main_md->part_type; | |
1f797edc | 958 | part_err = mmc_blk_part_switch(host->card, md->part_type); |
67716327 AH |
959 | if (part_err) { |
960 | /* | |
961 | * We have failed to get back into the correct | |
962 | * partition, so we need to abort the whole request. | |
963 | */ | |
964 | return -ENODEV; | |
965 | } | |
966 | } | |
967 | return err; | |
968 | } | |
969 | ||
970 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
971 | { | |
972 | md->reset_done &= ~type; | |
973 | } | |
974 | ||
5ec12396 LW |
975 | /* |
976 | * The non-block commands come back from the block layer after it queued it and | |
977 | * processed it with all other requests and then they get issued in this | |
978 | * function. | |
979 | */ | |
980 | static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) | |
981 | { | |
982 | struct mmc_queue_req *mq_rq; | |
983 | struct mmc_card *card = mq->card; | |
984 | struct mmc_blk_data *md = mq->blkdata; | |
69f7599e | 985 | struct mmc_blk_ioc_data **idata; |
97548575 | 986 | bool rpmb_ioctl; |
627c3ccf LW |
987 | u8 **ext_csd; |
988 | u32 status; | |
0493f6fe | 989 | int ret; |
5ec12396 LW |
990 | int i; |
991 | ||
992 | mq_rq = req_to_mmc_queue_req(req); | |
97548575 | 993 | rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB); |
5ec12396 LW |
994 | |
995 | switch (mq_rq->drv_op) { | |
996 | case MMC_DRV_OP_IOCTL: | |
97548575 | 997 | case MMC_DRV_OP_IOCTL_RPMB: |
69f7599e | 998 | idata = mq_rq->drv_op_data; |
7432b49b | 999 | for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) { |
69f7599e | 1000 | ret = __mmc_blk_ioctl_cmd(card, md, idata[i]); |
0493f6fe | 1001 | if (ret) |
5ec12396 LW |
1002 | break; |
1003 | } | |
5ec12396 | 1004 | /* Always switch back to main area after RPMB access */ |
97548575 LW |
1005 | if (rpmb_ioctl) |
1006 | mmc_blk_part_switch(card, 0); | |
0493f6fe LW |
1007 | break; |
1008 | case MMC_DRV_OP_BOOT_WP: | |
1009 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, | |
1010 | card->ext_csd.boot_ro_lock | | |
1011 | EXT_CSD_BOOT_WP_B_PWR_WP_EN, | |
1012 | card->ext_csd.part_time); | |
1013 | if (ret) | |
1014 | pr_err("%s: Locking boot partition ro until next power on failed: %d\n", | |
1015 | md->disk->disk_name, ret); | |
1016 | else | |
1017 | card->ext_csd.boot_ro_lock |= | |
1018 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; | |
5ec12396 | 1019 | break; |
627c3ccf LW |
1020 | case MMC_DRV_OP_GET_CARD_STATUS: |
1021 | ret = mmc_send_status(card, &status); | |
1022 | if (!ret) | |
1023 | ret = status; | |
1024 | break; | |
1025 | case MMC_DRV_OP_GET_EXT_CSD: | |
1026 | ext_csd = mq_rq->drv_op_data; | |
1027 | ret = mmc_get_ext_csd(card, ext_csd); | |
1028 | break; | |
5ec12396 | 1029 | default: |
0493f6fe LW |
1030 | pr_err("%s: unknown driver specific operation\n", |
1031 | md->disk->disk_name); | |
1032 | ret = -EINVAL; | |
5ec12396 LW |
1033 | break; |
1034 | } | |
0493f6fe | 1035 | mq_rq->drv_op_result = ret; |
0fbfd125 | 1036 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
5ec12396 LW |
1037 | } |
1038 | ||
df061588 | 1039 | static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
bd788c96 | 1040 | { |
7db3028e | 1041 | struct mmc_blk_data *md = mq->blkdata; |
bd788c96 | 1042 | struct mmc_card *card = md->queue.card; |
01904ff7 | 1043 | unsigned int from, nr; |
67716327 | 1044 | int err = 0, type = MMC_BLK_DISCARD; |
2a842aca | 1045 | blk_status_t status = BLK_STS_OK; |
bd788c96 | 1046 | |
bd788c96 | 1047 | if (!mmc_can_erase(card)) { |
2a842aca | 1048 | status = BLK_STS_NOTSUPP; |
8cb6ed17 | 1049 | goto fail; |
bd788c96 AH |
1050 | } |
1051 | ||
1052 | from = blk_rq_pos(req); | |
1053 | nr = blk_rq_sectors(req); | |
1054 | ||
164b50b3 GU |
1055 | do { |
1056 | err = 0; | |
1057 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
1058 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1059 | INAND_CMD38_ARG_EXT_CSD, | |
01904ff7 | 1060 | card->erase_arg == MMC_TRIM_ARG ? |
164b50b3 GU |
1061 | INAND_CMD38_ARG_TRIM : |
1062 | INAND_CMD38_ARG_ERASE, | |
ad91619a | 1063 | card->ext_csd.generic_cmd6_time); |
164b50b3 GU |
1064 | } |
1065 | if (!err) | |
01904ff7 | 1066 | err = mmc_erase(card, from, nr, card->erase_arg); |
164b50b3 | 1067 | } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); |
2a842aca CH |
1068 | if (err) |
1069 | status = BLK_STS_IOERR; | |
1070 | else | |
67716327 | 1071 | mmc_blk_reset_success(md, type); |
8cb6ed17 | 1072 | fail: |
0fbfd125 | 1073 | blk_mq_end_request(req, status); |
bd788c96 AH |
1074 | } |
1075 | ||
df061588 | 1076 | static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
49804548 AH |
1077 | struct request *req) |
1078 | { | |
7db3028e | 1079 | struct mmc_blk_data *md = mq->blkdata; |
49804548 | 1080 | struct mmc_card *card = md->queue.card; |
775a9362 | 1081 | unsigned int from, nr, arg; |
67716327 | 1082 | int err = 0, type = MMC_BLK_SECDISCARD; |
2a842aca | 1083 | blk_status_t status = BLK_STS_OK; |
49804548 | 1084 | |
775a9362 | 1085 | if (!(mmc_can_secure_erase_trim(card))) { |
2a842aca | 1086 | status = BLK_STS_NOTSUPP; |
49804548 AH |
1087 | goto out; |
1088 | } | |
1089 | ||
28302812 AH |
1090 | from = blk_rq_pos(req); |
1091 | nr = blk_rq_sectors(req); | |
1092 | ||
775a9362 ME |
1093 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) |
1094 | arg = MMC_SECURE_TRIM1_ARG; | |
1095 | else | |
1096 | arg = MMC_SECURE_ERASE_ARG; | |
d9ddd629 | 1097 | |
67716327 | 1098 | retry: |
6a7a6b45 AW |
1099 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1100 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1101 | INAND_CMD38_ARG_EXT_CSD, | |
1102 | arg == MMC_SECURE_TRIM1_ARG ? | |
1103 | INAND_CMD38_ARG_SECTRIM1 : | |
1104 | INAND_CMD38_ARG_SECERASE, | |
ad91619a | 1105 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1106 | if (err) |
28302812 | 1107 | goto out_retry; |
6a7a6b45 | 1108 | } |
28302812 | 1109 | |
49804548 | 1110 | err = mmc_erase(card, from, nr, arg); |
28302812 AH |
1111 | if (err == -EIO) |
1112 | goto out_retry; | |
2a842aca CH |
1113 | if (err) { |
1114 | status = BLK_STS_IOERR; | |
28302812 | 1115 | goto out; |
2a842aca | 1116 | } |
28302812 AH |
1117 | |
1118 | if (arg == MMC_SECURE_TRIM1_ARG) { | |
6a7a6b45 AW |
1119 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1120 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1121 | INAND_CMD38_ARG_EXT_CSD, | |
1122 | INAND_CMD38_ARG_SECTRIM2, | |
ad91619a | 1123 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1124 | if (err) |
28302812 | 1125 | goto out_retry; |
6a7a6b45 | 1126 | } |
28302812 | 1127 | |
49804548 | 1128 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
28302812 AH |
1129 | if (err == -EIO) |
1130 | goto out_retry; | |
2a842aca CH |
1131 | if (err) { |
1132 | status = BLK_STS_IOERR; | |
28302812 | 1133 | goto out; |
2a842aca | 1134 | } |
6a7a6b45 | 1135 | } |
28302812 | 1136 | |
28302812 AH |
1137 | out_retry: |
1138 | if (err && !mmc_blk_reset(md, card->host, type)) | |
67716327 AH |
1139 | goto retry; |
1140 | if (!err) | |
1141 | mmc_blk_reset_success(md, type); | |
28302812 | 1142 | out: |
0fbfd125 | 1143 | blk_mq_end_request(req, status); |
49804548 AH |
1144 | } |
1145 | ||
df061588 | 1146 | static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
f4c5522b | 1147 | { |
7db3028e | 1148 | struct mmc_blk_data *md = mq->blkdata; |
881d1c25 SJ |
1149 | struct mmc_card *card = md->queue.card; |
1150 | int ret = 0; | |
1151 | ||
1152 | ret = mmc_flush_cache(card); | |
0fbfd125 | 1153 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
f4c5522b AW |
1154 | } |
1155 | ||
1156 | /* | |
1157 | * Reformat current write as a reliable write, supporting | |
1158 | * both legacy and the enhanced reliable write MMC cards. | |
1159 | * In each transfer we'll handle only as much as a single | |
1160 | * reliable write can handle, thus finish the request in | |
1161 | * partial completions. | |
1162 | */ | |
d0c97cfb AW |
1163 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
1164 | struct mmc_card *card, | |
1165 | struct request *req) | |
f4c5522b | 1166 | { |
f4c5522b AW |
1167 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
1168 | /* Legacy mode imposes restrictions on transfers. */ | |
9cb38f7a | 1169 | if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors)) |
f4c5522b AW |
1170 | brq->data.blocks = 1; |
1171 | ||
1172 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
1173 | brq->data.blocks = card->ext_csd.rel_sectors; | |
1174 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
1175 | brq->data.blocks = 1; | |
1176 | } | |
f4c5522b AW |
1177 | } |
1178 | ||
f47a1fe3 AH |
1179 | #define CMD_ERRORS_EXCL_OOR \ |
1180 | (R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
4c2b8f26 RKAL |
1181 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ |
1182 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
a04e6bae | 1183 | R1_CARD_ECC_FAILED | /* Card ECC failed */ \ |
4c2b8f26 RKAL |
1184 | R1_CC_ERROR | /* Card controller error */ \ |
1185 | R1_ERROR) /* General/unknown error */ | |
1186 | ||
f47a1fe3 AH |
1187 | #define CMD_ERRORS \ |
1188 | (CMD_ERRORS_EXCL_OOR | \ | |
1189 | R1_OUT_OF_RANGE) /* Command argument out of range */ \ | |
1190 | ||
d83c2dba | 1191 | static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) |
a04e6bae | 1192 | { |
d83c2dba | 1193 | u32 val; |
a04e6bae | 1194 | |
d83c2dba SL |
1195 | /* |
1196 | * Per the SD specification(physical layer version 4.10)[1], | |
1197 | * section 4.3.3, it explicitly states that "When the last | |
1198 | * block of user area is read using CMD18, the host should | |
1199 | * ignore OUT_OF_RANGE error that may occur even the sequence | |
1200 | * is correct". And JESD84-B51 for eMMC also has a similar | |
1201 | * statement on section 6.8.3. | |
1202 | * | |
1203 | * Multiple block read/write could be done by either predefined | |
1204 | * method, namely CMD23, or open-ending mode. For open-ending mode, | |
1205 | * we should ignore the OUT_OF_RANGE error as it's normal behaviour. | |
1206 | * | |
1207 | * However the spec[1] doesn't tell us whether we should also | |
1208 | * ignore that for predefined method. But per the spec[1], section | |
1209 | * 4.15 Set Block Count Command, it says"If illegal block count | |
1210 | * is set, out of range error will be indicated during read/write | |
1211 | * operation (For example, data transfer is stopped at user area | |
1212 | * boundary)." In another word, we could expect a out of range error | |
1213 | * in the response for the following CMD18/25. And if argument of | |
1214 | * CMD23 + the argument of CMD18/25 exceed the max number of blocks, | |
1215 | * we could also expect to get a -ETIMEDOUT or any error number from | |
1216 | * the host drivers due to missing data response(for write)/data(for | |
1217 | * read), as the cards will stop the data transfer by itself per the | |
1218 | * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode. | |
1219 | */ | |
1220 | ||
1221 | if (!brq->stop.error) { | |
1222 | bool oor_with_open_end; | |
1223 | /* If there is no error yet, check R1 response */ | |
1224 | ||
1225 | val = brq->stop.resp[0] & CMD_ERRORS; | |
1226 | oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc; | |
1227 | ||
1228 | if (val && !oor_with_open_end) | |
1229 | brq->stop.error = -EIO; | |
1230 | } | |
a04e6bae WS |
1231 | } |
1232 | ||
ca5717f7 | 1233 | static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, |
d3377c01 AH |
1234 | int disable_multi, bool *do_rel_wr_p, |
1235 | bool *do_data_tag_p) | |
1da177e4 | 1236 | { |
ca5717f7 AH |
1237 | struct mmc_blk_data *md = mq->blkdata; |
1238 | struct mmc_card *card = md->queue.card; | |
54d49d77 | 1239 | struct mmc_blk_request *brq = &mqrq->brq; |
67e69d52 | 1240 | struct request *req = mmc_queue_req_to_req(mqrq); |
d3377c01 | 1241 | bool do_rel_wr, do_data_tag; |
1da177e4 | 1242 | |
f4c5522b AW |
1243 | /* |
1244 | * Reliable writes are used to implement Forced Unit Access and | |
d3df0465 | 1245 | * are supported only on MMCs. |
f4c5522b | 1246 | */ |
d3377c01 AH |
1247 | do_rel_wr = (req->cmd_flags & REQ_FUA) && |
1248 | rq_data_dir(req) == WRITE && | |
1249 | (md->flags & MMC_BLK_REL_WR); | |
f4c5522b | 1250 | |
54d49d77 | 1251 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
ca5717f7 | 1252 | |
54d49d77 | 1253 | brq->mrq.data = &brq->data; |
93482b3d | 1254 | brq->mrq.tag = req->tag; |
1da177e4 | 1255 | |
54d49d77 PF |
1256 | brq->stop.opcode = MMC_STOP_TRANSMISSION; |
1257 | brq->stop.arg = 0; | |
ca5717f7 AH |
1258 | |
1259 | if (rq_data_dir(req) == READ) { | |
1260 | brq->data.flags = MMC_DATA_READ; | |
1261 | brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1262 | } else { | |
1263 | brq->data.flags = MMC_DATA_WRITE; | |
1264 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1265 | } | |
1266 | ||
1267 | brq->data.blksz = 512; | |
54d49d77 | 1268 | brq->data.blocks = blk_rq_sectors(req); |
93482b3d AH |
1269 | brq->data.blk_addr = blk_rq_pos(req); |
1270 | ||
1271 | /* | |
1272 | * The command queue supports 2 priorities: "high" (1) and "simple" (0). | |
1273 | * The eMMC will give "high" priority tasks priority over "simple" | |
1274 | * priority tasks. Here we always set "simple" priority by not setting | |
1275 | * MMC_DATA_PRIO. | |
1276 | */ | |
6a79e391 | 1277 | |
54d49d77 PF |
1278 | /* |
1279 | * The block layer doesn't support all sector count | |
1280 | * restrictions, so we need to be prepared for too big | |
1281 | * requests. | |
1282 | */ | |
1283 | if (brq->data.blocks > card->host->max_blk_count) | |
1284 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1285 | |
2bf22b39 | 1286 | if (brq->data.blocks > 1) { |
41591b38 CB |
1287 | /* |
1288 | * Some SD cards in SPI mode return a CRC error or even lock up | |
1289 | * completely when trying to read the last block using a | |
1290 | * multiblock read command. | |
1291 | */ | |
1292 | if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) && | |
1293 | (blk_rq_pos(req) + blk_rq_sectors(req) == | |
1294 | get_capacity(md->disk))) | |
1295 | brq->data.blocks--; | |
1296 | ||
2bf22b39 PW |
1297 | /* |
1298 | * After a read error, we redo the request one sector | |
1299 | * at a time in order to accurately determine which | |
1300 | * sectors can be read successfully. | |
1301 | */ | |
1302 | if (disable_multi) | |
1303 | brq->data.blocks = 1; | |
1304 | ||
2e47e842 KM |
1305 | /* |
1306 | * Some controllers have HW issues while operating | |
1307 | * in multiple I/O mode | |
1308 | */ | |
1309 | if (card->host->ops->multi_io_quirk) | |
1310 | brq->data.blocks = card->host->ops->multi_io_quirk(card, | |
1311 | (rq_data_dir(req) == READ) ? | |
1312 | MMC_DATA_READ : MMC_DATA_WRITE, | |
1313 | brq->data.blocks); | |
2bf22b39 | 1314 | } |
d0c97cfb | 1315 | |
93482b3d | 1316 | if (do_rel_wr) { |
ca5717f7 | 1317 | mmc_apply_rel_rw(brq, card, req); |
93482b3d AH |
1318 | brq->data.flags |= MMC_DATA_REL_WR; |
1319 | } | |
ca5717f7 AH |
1320 | |
1321 | /* | |
1322 | * Data tag is used only during writing meta data to speed | |
1323 | * up write and any subsequent read of this meta data | |
1324 | */ | |
d3377c01 AH |
1325 | do_data_tag = card->ext_csd.data_tag_unit_size && |
1326 | (req->cmd_flags & REQ_META) && | |
1327 | (rq_data_dir(req) == WRITE) && | |
1328 | ((brq->data.blocks * brq->data.blksz) >= | |
1329 | card->ext_csd.data_tag_unit_size); | |
ca5717f7 | 1330 | |
93482b3d AH |
1331 | if (do_data_tag) |
1332 | brq->data.flags |= MMC_DATA_DAT_TAG; | |
1333 | ||
ca5717f7 AH |
1334 | mmc_set_data_timeout(&brq->data, card); |
1335 | ||
1336 | brq->data.sg = mqrq->sg; | |
1337 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1338 | ||
1339 | /* | |
1340 | * Adjust the sg list so it is the same size as the | |
1341 | * request. | |
1342 | */ | |
1343 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1344 | int i, data_size = brq->data.blocks << 9; | |
1345 | struct scatterlist *sg; | |
1346 | ||
1347 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1348 | data_size -= sg->length; | |
1349 | if (data_size <= 0) { | |
1350 | sg->length += data_size; | |
1351 | i++; | |
1352 | break; | |
1353 | } | |
1354 | } | |
1355 | brq->data.sg_len = i; | |
1356 | } | |
1357 | ||
d3377c01 AH |
1358 | if (do_rel_wr_p) |
1359 | *do_rel_wr_p = do_rel_wr; | |
1360 | ||
1361 | if (do_data_tag_p) | |
1362 | *do_data_tag_p = do_data_tag; | |
ca5717f7 AH |
1363 | } |
1364 | ||
1e8e55b6 AH |
1365 | #define MMC_CQE_RETRIES 2 |
1366 | ||
1367 | static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) | |
1368 | { | |
1369 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1370 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1371 | struct request_queue *q = req->q; | |
1372 | struct mmc_host *host = mq->card->host; | |
e6bfb1bf | 1373 | enum mmc_issue_type issue_type = mmc_issue_type(mq, req); |
1e8e55b6 AH |
1374 | unsigned long flags; |
1375 | bool put_card; | |
1376 | int err; | |
1377 | ||
1378 | mmc_cqe_post_req(host, mrq); | |
1379 | ||
1380 | if (mrq->cmd && mrq->cmd->error) | |
1381 | err = mrq->cmd->error; | |
1382 | else if (mrq->data && mrq->data->error) | |
1383 | err = mrq->data->error; | |
1384 | else | |
1385 | err = 0; | |
1386 | ||
1387 | if (err) { | |
1388 | if (mqrq->retries++ < MMC_CQE_RETRIES) | |
1389 | blk_mq_requeue_request(req, true); | |
1390 | else | |
1391 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1392 | } else if (mrq->data) { | |
1393 | if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered)) | |
1394 | blk_mq_requeue_request(req, true); | |
1395 | else | |
1396 | __blk_mq_end_request(req, BLK_STS_OK); | |
1397 | } else { | |
1398 | blk_mq_end_request(req, BLK_STS_OK); | |
1399 | } | |
1400 | ||
f5d72c5c | 1401 | spin_lock_irqsave(&mq->lock, flags); |
1e8e55b6 | 1402 | |
e6bfb1bf | 1403 | mq->in_flight[issue_type] -= 1; |
1e8e55b6 AH |
1404 | |
1405 | put_card = (mmc_tot_in_flight(mq) == 0); | |
1406 | ||
1407 | mmc_cqe_check_busy(mq); | |
1408 | ||
f5d72c5c | 1409 | spin_unlock_irqrestore(&mq->lock, flags); |
1e8e55b6 AH |
1410 | |
1411 | if (!mq->cqe_busy) | |
1412 | blk_mq_run_hw_queues(q, true); | |
1413 | ||
1414 | if (put_card) | |
1415 | mmc_put_card(mq->card, &mq->ctx); | |
1416 | } | |
1417 | ||
1418 | void mmc_blk_cqe_recovery(struct mmc_queue *mq) | |
1419 | { | |
1420 | struct mmc_card *card = mq->card; | |
1421 | struct mmc_host *host = card->host; | |
1422 | int err; | |
1423 | ||
1424 | pr_debug("%s: CQE recovery start\n", mmc_hostname(host)); | |
1425 | ||
1426 | err = mmc_cqe_recovery(host); | |
1427 | if (err) | |
1428 | mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY); | |
1429 | else | |
1430 | mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY); | |
1431 | ||
1432 | pr_debug("%s: CQE recovery done\n", mmc_hostname(host)); | |
1433 | } | |
1434 | ||
1435 | static void mmc_blk_cqe_req_done(struct mmc_request *mrq) | |
1436 | { | |
1437 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
1438 | brq.mrq); | |
1439 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1440 | struct request_queue *q = req->q; | |
1441 | struct mmc_queue *mq = q->queuedata; | |
1442 | ||
1443 | /* | |
1444 | * Block layer timeouts race with completions which means the normal | |
1445 | * completion path cannot be used during recovery. | |
1446 | */ | |
1447 | if (mq->in_recovery) | |
1448 | mmc_blk_cqe_complete_rq(mq, req); | |
1449 | else | |
1450 | blk_mq_complete_request(req); | |
1451 | } | |
1452 | ||
1453 | static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
1454 | { | |
1455 | mrq->done = mmc_blk_cqe_req_done; | |
1456 | mrq->recovery_notifier = mmc_cqe_recovery_notifier; | |
1457 | ||
1458 | return mmc_cqe_start_req(host, mrq); | |
1459 | } | |
1460 | ||
1461 | static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq, | |
1462 | struct request *req) | |
1463 | { | |
1464 | struct mmc_blk_request *brq = &mqrq->brq; | |
1465 | ||
1466 | memset(brq, 0, sizeof(*brq)); | |
1467 | ||
1468 | brq->mrq.cmd = &brq->cmd; | |
1469 | brq->mrq.tag = req->tag; | |
1470 | ||
1471 | return &brq->mrq; | |
1472 | } | |
1473 | ||
1474 | static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req) | |
1475 | { | |
1476 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1477 | struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req); | |
1478 | ||
1479 | mrq->cmd->opcode = MMC_SWITCH; | |
1480 | mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1481 | (EXT_CSD_FLUSH_CACHE << 16) | | |
1482 | (1 << 8) | | |
1483 | EXT_CSD_CMD_SET_NORMAL; | |
1484 | mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B; | |
1485 | ||
1486 | return mmc_blk_cqe_start_req(mq->card->host, mrq); | |
1487 | } | |
1488 | ||
511ce378 BW |
1489 | static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1490 | { | |
1491 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1492 | struct mmc_host *host = mq->card->host; | |
1493 | int err; | |
1494 | ||
1495 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
1496 | mqrq->brq.mrq.done = mmc_blk_hsq_req_done; | |
1497 | mmc_pre_req(host, &mqrq->brq.mrq); | |
1498 | ||
1499 | err = mmc_cqe_start_req(host, &mqrq->brq.mrq); | |
1500 | if (err) | |
1501 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
1502 | ||
1503 | return err; | |
1504 | } | |
1505 | ||
1e8e55b6 AH |
1506 | static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1507 | { | |
1508 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
511ce378 BW |
1509 | struct mmc_host *host = mq->card->host; |
1510 | ||
1511 | if (host->hsq_enabled) | |
1512 | return mmc_blk_hsq_issue_rw_rq(mq, req); | |
1e8e55b6 AH |
1513 | |
1514 | mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL); | |
1515 | ||
1516 | return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq); | |
1517 | } | |
1518 | ||
ca5717f7 AH |
1519 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
1520 | struct mmc_card *card, | |
1521 | int disable_multi, | |
1522 | struct mmc_queue *mq) | |
1523 | { | |
1524 | u32 readcmd, writecmd; | |
1525 | struct mmc_blk_request *brq = &mqrq->brq; | |
67e69d52 | 1526 | struct request *req = mmc_queue_req_to_req(mqrq); |
ca5717f7 AH |
1527 | struct mmc_blk_data *md = mq->blkdata; |
1528 | bool do_rel_wr, do_data_tag; | |
1529 | ||
1530 | mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag); | |
1531 | ||
1532 | brq->mrq.cmd = &brq->cmd; | |
1533 | ||
1534 | brq->cmd.arg = blk_rq_pos(req); | |
1535 | if (!mmc_card_blockaddr(card)) | |
1536 | brq->cmd.arg <<= 9; | |
1537 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1538 | ||
54d49d77 PF |
1539 | if (brq->data.blocks > 1 || do_rel_wr) { |
1540 | /* SPI multiblock writes terminate using a special | |
1541 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1542 | */ |
54d49d77 PF |
1543 | if (!mmc_host_is_spi(card->host) || |
1544 | rq_data_dir(req) == READ) | |
1545 | brq->mrq.stop = &brq->stop; | |
1546 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1547 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1548 | } else { | |
1549 | brq->mrq.stop = NULL; | |
1550 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1551 | writecmd = MMC_WRITE_BLOCK; | |
1552 | } | |
ca5717f7 | 1553 | brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd; |
4265900e | 1554 | |
54d49d77 PF |
1555 | /* |
1556 | * Pre-defined multi-block transfers are preferable to | |
1557 | * open ended-ones (and necessary for reliable writes). | |
1558 | * However, it is not sufficient to just send CMD23, | |
1559 | * and avoid the final CMD12, as on an error condition | |
1560 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1561 | * with Auto-CMD23 enhancements provided by some | |
1562 | * hosts, means that the complexity of dealing | |
1563 | * with this is best left to the host. If CMD23 is | |
1564 | * supported by card and host, we'll fill sbc in and let | |
1565 | * the host deal with handling it correctly. This means | |
1566 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1567 | * change of behavior will be observed. | |
1568 | * | |
1569 | * N.B: Some MMC cards experience perf degradation. | |
1570 | * We'll avoid using CMD23-bounded multiblock writes for | |
1571 | * these, while retaining features like reliable writes. | |
1572 | */ | |
4265900e SD |
1573 | if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && |
1574 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || | |
1575 | do_data_tag)) { | |
54d49d77 PF |
1576 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; |
1577 | brq->sbc.arg = brq->data.blocks | | |
4265900e SD |
1578 | (do_rel_wr ? (1 << 31) : 0) | |
1579 | (do_data_tag ? (1 << 29) : 0); | |
54d49d77 PF |
1580 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1581 | brq->mrq.sbc = &brq->sbc; | |
1582 | } | |
54d49d77 | 1583 | } |
6a79e391 | 1584 | |
81196976 | 1585 | #define MMC_MAX_RETRIES 5 |
7eb43d53 | 1586 | #define MMC_DATA_RETRIES 2 |
81196976 AH |
1587 | #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1) |
1588 | ||
7eb43d53 AH |
1589 | static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout) |
1590 | { | |
1591 | struct mmc_command cmd = { | |
1592 | .opcode = MMC_STOP_TRANSMISSION, | |
1593 | .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC, | |
1594 | /* Some hosts wait for busy anyway, so provide a busy timeout */ | |
1595 | .busy_timeout = timeout, | |
1596 | }; | |
1597 | ||
1598 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
1599 | } | |
1600 | ||
1601 | static int mmc_blk_fix_state(struct mmc_card *card, struct request *req) | |
1602 | { | |
1603 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1604 | struct mmc_blk_request *brq = &mqrq->brq; | |
1605 | unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data); | |
1606 | int err; | |
1607 | ||
1608 | mmc_retune_hold_now(card->host); | |
1609 | ||
1610 | mmc_blk_send_stop(card, timeout); | |
1611 | ||
3869468e | 1612 | err = card_busy_detect(card, timeout, NULL); |
7eb43d53 AH |
1613 | |
1614 | mmc_retune_release(card->host); | |
1615 | ||
1616 | return err; | |
1617 | } | |
1618 | ||
81196976 AH |
1619 | #define MMC_READ_SINGLE_RETRIES 2 |
1620 | ||
1621 | /* Single sector read during recovery */ | |
1622 | static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) | |
1623 | { | |
1624 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1625 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1626 | struct mmc_card *card = mq->card; | |
1627 | struct mmc_host *host = card->host; | |
1628 | blk_status_t error = BLK_STS_OK; | |
1629 | int retries = 0; | |
1630 | ||
1631 | do { | |
1632 | u32 status; | |
1633 | int err; | |
1634 | ||
1635 | mmc_blk_rw_rq_prep(mqrq, card, 1, mq); | |
1636 | ||
1637 | mmc_wait_for_req(host, mrq); | |
1638 | ||
1639 | err = mmc_send_status(card, &status); | |
1640 | if (err) | |
1641 | goto error_exit; | |
1642 | ||
1643 | if (!mmc_host_is_spi(host) && | |
40c96853 | 1644 | !mmc_ready_for_data(status)) { |
7eb43d53 | 1645 | err = mmc_blk_fix_state(card, req); |
81196976 AH |
1646 | if (err) |
1647 | goto error_exit; | |
1648 | } | |
1649 | ||
1650 | if (mrq->cmd->error && retries++ < MMC_READ_SINGLE_RETRIES) | |
1651 | continue; | |
1652 | ||
1653 | retries = 0; | |
1654 | ||
1655 | if (mrq->cmd->error || | |
1656 | mrq->data->error || | |
1657 | (!mmc_host_is_spi(host) && | |
1658 | (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS))) | |
1659 | error = BLK_STS_IOERR; | |
1660 | else | |
1661 | error = BLK_STS_OK; | |
1662 | ||
1663 | } while (blk_update_request(req, error, 512)); | |
1664 | ||
1665 | return; | |
1666 | ||
1667 | error_exit: | |
1668 | mrq->data->bytes_xfered = 0; | |
1669 | blk_update_request(req, BLK_STS_IOERR, 512); | |
1670 | /* Let it try the remaining request again */ | |
1671 | if (mqrq->retries > MMC_MAX_RETRIES - 1) | |
1672 | mqrq->retries = MMC_MAX_RETRIES - 1; | |
1673 | } | |
1674 | ||
7eb43d53 AH |
1675 | static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) |
1676 | { | |
1677 | return !!brq->mrq.sbc; | |
1678 | } | |
1679 | ||
1680 | static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) | |
1681 | { | |
1682 | return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; | |
1683 | } | |
1684 | ||
1685 | /* | |
1686 | * Check for errors the host controller driver might not have seen such as | |
1687 | * response mode errors or invalid card state. | |
1688 | */ | |
1689 | static bool mmc_blk_status_error(struct request *req, u32 status) | |
1690 | { | |
1691 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1692 | struct mmc_blk_request *brq = &mqrq->brq; | |
1693 | struct mmc_queue *mq = req->q->queuedata; | |
1694 | u32 stop_err_bits; | |
1695 | ||
1696 | if (mmc_host_is_spi(mq->card->host)) | |
aa950144 | 1697 | return false; |
7eb43d53 AH |
1698 | |
1699 | stop_err_bits = mmc_blk_stop_err_bits(brq); | |
1700 | ||
1701 | return brq->cmd.resp[0] & CMD_ERRORS || | |
1702 | brq->stop.resp[0] & stop_err_bits || | |
1703 | status & stop_err_bits || | |
40c96853 | 1704 | (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status)); |
7eb43d53 AH |
1705 | } |
1706 | ||
1707 | static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq) | |
1708 | { | |
1709 | return !brq->sbc.error && !brq->cmd.error && | |
1710 | !(brq->cmd.resp[0] & CMD_ERRORS); | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Requests are completed by mmc_blk_mq_complete_rq() which sets simple | |
1715 | * policy: | |
1716 | * 1. A request that has transferred at least some data is considered | |
1717 | * successful and will be requeued if there is remaining data to | |
1718 | * transfer. | |
1719 | * 2. Otherwise the number of retries is incremented and the request | |
1720 | * will be requeued if there are remaining retries. | |
1721 | * 3. Otherwise the request will be errored out. | |
1722 | * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and | |
1723 | * mqrq->retries. So there are only 4 possible actions here: | |
1724 | * 1. do not accept the bytes_xfered value i.e. set it to zero | |
1725 | * 2. change mqrq->retries to determine the number of retries | |
1726 | * 3. try to reset the card | |
1727 | * 4. read one sector at a time | |
1728 | */ | |
81196976 AH |
1729 | static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) |
1730 | { | |
1731 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1732 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1733 | struct mmc_blk_request *brq = &mqrq->brq; | |
1734 | struct mmc_blk_data *md = mq->blkdata; | |
1735 | struct mmc_card *card = mq->card; | |
7eb43d53 AH |
1736 | u32 status; |
1737 | u32 blocks; | |
1738 | int err; | |
81196976 | 1739 | |
7eb43d53 AH |
1740 | /* |
1741 | * Some errors the host driver might not have seen. Set the number of | |
1742 | * bytes transferred to zero in that case. | |
1743 | */ | |
1744 | err = __mmc_send_status(card, &status, 0); | |
1745 | if (err || mmc_blk_status_error(req, status)) | |
1746 | brq->data.bytes_xfered = 0; | |
81196976 AH |
1747 | |
1748 | mmc_retune_release(card->host); | |
1749 | ||
1750 | /* | |
7eb43d53 AH |
1751 | * Try again to get the status. This also provides an opportunity for |
1752 | * re-tuning. | |
81196976 | 1753 | */ |
7eb43d53 AH |
1754 | if (err) |
1755 | err = __mmc_send_status(card, &status, 0); | |
81196976 | 1756 | |
7eb43d53 AH |
1757 | /* |
1758 | * Nothing more to do after the number of bytes transferred has been | |
1759 | * updated and there is no card. | |
1760 | */ | |
1761 | if (err && mmc_detect_card_removed(card->host)) | |
1762 | return; | |
81196976 | 1763 | |
7eb43d53 AH |
1764 | /* Try to get back to "tran" state */ |
1765 | if (!mmc_host_is_spi(mq->card->host) && | |
40c96853 | 1766 | (err || !mmc_ready_for_data(status))) |
7eb43d53 AH |
1767 | err = mmc_blk_fix_state(mq->card, req); |
1768 | ||
1769 | /* | |
1770 | * Special case for SD cards where the card might record the number of | |
1771 | * blocks written. | |
1772 | */ | |
1773 | if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) && | |
1774 | rq_data_dir(req) == WRITE) { | |
1775 | if (mmc_sd_num_wr_blocks(card, &blocks)) | |
1776 | brq->data.bytes_xfered = 0; | |
1777 | else | |
1778 | brq->data.bytes_xfered = blocks << 9; | |
81196976 | 1779 | } |
7eb43d53 AH |
1780 | |
1781 | /* Reset if the card is in a bad state */ | |
1782 | if (!mmc_host_is_spi(mq->card->host) && | |
1783 | err && mmc_blk_reset(md, card->host, type)) { | |
1784 | pr_err("%s: recovery failed!\n", req->rq_disk->disk_name); | |
81196976 | 1785 | mqrq->retries = MMC_NO_RETRIES; |
7eb43d53 AH |
1786 | return; |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * If anything was done, just return and if there is anything remaining | |
1791 | * on the request it will get requeued. | |
1792 | */ | |
1793 | if (brq->data.bytes_xfered) | |
1794 | return; | |
1795 | ||
1796 | /* Reset before last retry */ | |
1797 | if (mqrq->retries + 1 == MMC_MAX_RETRIES) | |
1798 | mmc_blk_reset(md, card->host, type); | |
1799 | ||
1800 | /* Command errors fail fast, so use all MMC_MAX_RETRIES */ | |
1801 | if (brq->sbc.error || brq->cmd.error) | |
1802 | return; | |
1803 | ||
1804 | /* Reduce the remaining retries for data errors */ | |
1805 | if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) { | |
1806 | mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES; | |
1807 | return; | |
1808 | } | |
1809 | ||
1810 | /* FIXME: Missing single sector read for large sector size */ | |
1811 | if (!mmc_large_sector(card) && rq_data_dir(req) == READ && | |
1812 | brq->data.blocks > 1) { | |
1813 | /* Read one sector at a time */ | |
1814 | mmc_blk_read_single(mq, req); | |
1815 | return; | |
81196976 AH |
1816 | } |
1817 | } | |
1818 | ||
10f21df4 AH |
1819 | static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) |
1820 | { | |
1821 | mmc_blk_eval_resp_error(brq); | |
1822 | ||
1823 | return brq->sbc.error || brq->cmd.error || brq->stop.error || | |
1824 | brq->data.error || brq->cmd.resp[0] & CMD_ERRORS; | |
1825 | } | |
1826 | ||
88a51646 AH |
1827 | static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) |
1828 | { | |
1829 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
f47a1fe3 | 1830 | u32 status = 0; |
88a51646 AH |
1831 | int err; |
1832 | ||
1833 | if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) | |
1834 | return 0; | |
1835 | ||
3869468e | 1836 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, &status); |
88a51646 | 1837 | |
f47a1fe3 AH |
1838 | /* |
1839 | * Do not assume data transferred correctly if there are any error bits | |
1840 | * set. | |
1841 | */ | |
1842 | if (status & mmc_blk_stop_err_bits(&mqrq->brq)) { | |
1843 | mqrq->brq.data.bytes_xfered = 0; | |
88a51646 AH |
1844 | err = err ? err : -EIO; |
1845 | } | |
1846 | ||
f47a1fe3 AH |
1847 | /* Copy the exception bit so it will be seen later on */ |
1848 | if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT) | |
1849 | mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; | |
1850 | ||
88a51646 AH |
1851 | return err; |
1852 | } | |
1853 | ||
10f21df4 AH |
1854 | static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq, |
1855 | struct request *req) | |
1856 | { | |
1857 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1858 | ||
1859 | mmc_blk_reset_success(mq->blkdata, type); | |
1860 | } | |
1861 | ||
81196976 AH |
1862 | static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req) |
1863 | { | |
1864 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1865 | unsigned int nr_bytes = mqrq->brq.data.bytes_xfered; | |
1866 | ||
1867 | if (nr_bytes) { | |
1868 | if (blk_update_request(req, BLK_STS_OK, nr_bytes)) | |
1869 | blk_mq_requeue_request(req, true); | |
1870 | else | |
1871 | __blk_mq_end_request(req, BLK_STS_OK); | |
1872 | } else if (!blk_rq_bytes(req)) { | |
1873 | __blk_mq_end_request(req, BLK_STS_IOERR); | |
1874 | } else if (mqrq->retries++ < MMC_MAX_RETRIES) { | |
1875 | blk_mq_requeue_request(req, true); | |
1876 | } else { | |
1877 | if (mmc_card_removed(mq->card)) | |
1878 | req->rq_flags |= RQF_QUIET; | |
1879 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq, | |
1884 | struct mmc_queue_req *mqrq) | |
1885 | { | |
1886 | return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) && | |
1887 | (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT || | |
1888 | mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT); | |
1889 | } | |
1890 | ||
1891 | static void mmc_blk_urgent_bkops(struct mmc_queue *mq, | |
1892 | struct mmc_queue_req *mqrq) | |
1893 | { | |
1894 | if (mmc_blk_urgent_bkops_needed(mq, mqrq)) | |
0c204979 | 1895 | mmc_run_bkops(mq->card); |
81196976 AH |
1896 | } |
1897 | ||
511ce378 BW |
1898 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq) |
1899 | { | |
1900 | struct mmc_queue_req *mqrq = | |
1901 | container_of(mrq, struct mmc_queue_req, brq.mrq); | |
1902 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1903 | struct request_queue *q = req->q; | |
1904 | struct mmc_queue *mq = q->queuedata; | |
1905 | struct mmc_host *host = mq->card->host; | |
1906 | unsigned long flags; | |
1907 | ||
1908 | if (mmc_blk_rq_error(&mqrq->brq) || | |
1909 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
1910 | spin_lock_irqsave(&mq->lock, flags); | |
1911 | mq->recovery_needed = true; | |
1912 | mq->recovery_req = req; | |
1913 | spin_unlock_irqrestore(&mq->lock, flags); | |
1914 | ||
1915 | host->cqe_ops->cqe_recovery_start(host); | |
1916 | ||
1917 | schedule_work(&mq->recovery_work); | |
1918 | return; | |
1919 | } | |
1920 | ||
1921 | mmc_blk_rw_reset_success(mq, req); | |
1922 | ||
1923 | /* | |
1924 | * Block layer timeouts race with completions which means the normal | |
1925 | * completion path cannot be used during recovery. | |
1926 | */ | |
1927 | if (mq->in_recovery) | |
1928 | mmc_blk_cqe_complete_rq(mq, req); | |
1929 | else | |
1930 | blk_mq_complete_request(req); | |
1931 | } | |
1932 | ||
81196976 AH |
1933 | void mmc_blk_mq_complete(struct request *req) |
1934 | { | |
1935 | struct mmc_queue *mq = req->q->queuedata; | |
1936 | ||
1e8e55b6 AH |
1937 | if (mq->use_cqe) |
1938 | mmc_blk_cqe_complete_rq(mq, req); | |
1939 | else | |
1940 | mmc_blk_mq_complete_rq(mq, req); | |
81196976 AH |
1941 | } |
1942 | ||
1943 | static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, | |
1944 | struct request *req) | |
1945 | { | |
1946 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
88a51646 | 1947 | struct mmc_host *host = mq->card->host; |
81196976 | 1948 | |
88a51646 AH |
1949 | if (mmc_blk_rq_error(&mqrq->brq) || |
1950 | mmc_blk_card_busy(mq->card, req)) { | |
1951 | mmc_blk_mq_rw_recovery(mq, req); | |
1952 | } else { | |
1953 | mmc_blk_rw_reset_success(mq, req); | |
1954 | mmc_retune_release(host); | |
1955 | } | |
81196976 AH |
1956 | |
1957 | mmc_blk_urgent_bkops(mq, mqrq); | |
1958 | } | |
1959 | ||
1960 | static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) | |
1961 | { | |
81196976 AH |
1962 | unsigned long flags; |
1963 | bool put_card; | |
1964 | ||
f5d72c5c | 1965 | spin_lock_irqsave(&mq->lock, flags); |
81196976 AH |
1966 | |
1967 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
1968 | ||
1969 | put_card = (mmc_tot_in_flight(mq) == 0); | |
1970 | ||
f5d72c5c | 1971 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
1972 | |
1973 | if (put_card) | |
1974 | mmc_put_card(mq->card, &mq->ctx); | |
1975 | } | |
1976 | ||
1977 | static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) | |
1978 | { | |
1979 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1980 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1981 | struct mmc_host *host = mq->card->host; | |
1982 | ||
1983 | mmc_post_req(host, mrq, 0); | |
1984 | ||
10f21df4 AH |
1985 | /* |
1986 | * Block layer timeouts race with completions which means the normal | |
1987 | * completion path cannot be used during recovery. | |
1988 | */ | |
1989 | if (mq->in_recovery) | |
1990 | mmc_blk_mq_complete_rq(mq, req); | |
1991 | else | |
1992 | blk_mq_complete_request(req); | |
81196976 AH |
1993 | |
1994 | mmc_blk_mq_dec_in_flight(mq, req); | |
1995 | } | |
1996 | ||
10f21df4 AH |
1997 | void mmc_blk_mq_recovery(struct mmc_queue *mq) |
1998 | { | |
1999 | struct request *req = mq->recovery_req; | |
2000 | struct mmc_host *host = mq->card->host; | |
2001 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2002 | ||
2003 | mq->recovery_req = NULL; | |
2004 | mq->rw_wait = false; | |
2005 | ||
2006 | if (mmc_blk_rq_error(&mqrq->brq)) { | |
2007 | mmc_retune_hold_now(host); | |
2008 | mmc_blk_mq_rw_recovery(mq, req); | |
2009 | } | |
2010 | ||
2011 | mmc_blk_urgent_bkops(mq, mqrq); | |
2012 | ||
2013 | mmc_blk_mq_post_req(mq, req); | |
2014 | } | |
2015 | ||
81196976 AH |
2016 | static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, |
2017 | struct request **prev_req) | |
2018 | { | |
10f21df4 AH |
2019 | if (mmc_host_done_complete(mq->card->host)) |
2020 | return; | |
2021 | ||
81196976 AH |
2022 | mutex_lock(&mq->complete_lock); |
2023 | ||
2024 | if (!mq->complete_req) | |
2025 | goto out_unlock; | |
2026 | ||
2027 | mmc_blk_mq_poll_completion(mq, mq->complete_req); | |
2028 | ||
2029 | if (prev_req) | |
2030 | *prev_req = mq->complete_req; | |
2031 | else | |
2032 | mmc_blk_mq_post_req(mq, mq->complete_req); | |
2033 | ||
2034 | mq->complete_req = NULL; | |
2035 | ||
2036 | out_unlock: | |
2037 | mutex_unlock(&mq->complete_lock); | |
2038 | } | |
2039 | ||
2040 | void mmc_blk_mq_complete_work(struct work_struct *work) | |
2041 | { | |
2042 | struct mmc_queue *mq = container_of(work, struct mmc_queue, | |
2043 | complete_work); | |
2044 | ||
2045 | mmc_blk_mq_complete_prev_req(mq, NULL); | |
2046 | } | |
2047 | ||
2048 | static void mmc_blk_mq_req_done(struct mmc_request *mrq) | |
2049 | { | |
2050 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
2051 | brq.mrq); | |
2052 | struct request *req = mmc_queue_req_to_req(mqrq); | |
2053 | struct request_queue *q = req->q; | |
2054 | struct mmc_queue *mq = q->queuedata; | |
10f21df4 | 2055 | struct mmc_host *host = mq->card->host; |
81196976 | 2056 | unsigned long flags; |
81196976 | 2057 | |
10f21df4 AH |
2058 | if (!mmc_host_done_complete(host)) { |
2059 | bool waiting; | |
81196976 | 2060 | |
10f21df4 AH |
2061 | /* |
2062 | * We cannot complete the request in this context, so record | |
2063 | * that there is a request to complete, and that a following | |
2064 | * request does not need to wait (although it does need to | |
2065 | * complete complete_req first). | |
2066 | */ | |
f5d72c5c | 2067 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2068 | mq->complete_req = req; |
2069 | mq->rw_wait = false; | |
2070 | waiting = mq->waiting; | |
f5d72c5c | 2071 | spin_unlock_irqrestore(&mq->lock, flags); |
10f21df4 AH |
2072 | |
2073 | /* | |
2074 | * If 'waiting' then the waiting task will complete this | |
2075 | * request, otherwise queue a work to do it. Note that | |
2076 | * complete_work may still race with the dispatch of a following | |
2077 | * request. | |
2078 | */ | |
2079 | if (waiting) | |
2080 | wake_up(&mq->wait); | |
2081 | else | |
dcf6e2e3 | 2082 | queue_work(mq->card->complete_wq, &mq->complete_work); |
10f21df4 AH |
2083 | |
2084 | return; | |
2085 | } | |
2086 | ||
2087 | /* Take the recovery path for errors or urgent background operations */ | |
2088 | if (mmc_blk_rq_error(&mqrq->brq) || | |
2089 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
f5d72c5c | 2090 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2091 | mq->recovery_needed = true; |
2092 | mq->recovery_req = req; | |
f5d72c5c | 2093 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 | 2094 | wake_up(&mq->wait); |
10f21df4 AH |
2095 | schedule_work(&mq->recovery_work); |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | mmc_blk_rw_reset_success(mq, req); | |
2100 | ||
2101 | mq->rw_wait = false; | |
2102 | wake_up(&mq->wait); | |
2103 | ||
2104 | mmc_blk_mq_post_req(mq, req); | |
81196976 AH |
2105 | } |
2106 | ||
2107 | static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) | |
2108 | { | |
81196976 AH |
2109 | unsigned long flags; |
2110 | bool done; | |
2111 | ||
2112 | /* | |
10f21df4 AH |
2113 | * Wait while there is another request in progress, but not if recovery |
2114 | * is needed. Also indicate whether there is a request waiting to start. | |
81196976 | 2115 | */ |
f5d72c5c | 2116 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2117 | if (mq->recovery_needed) { |
2118 | *err = -EBUSY; | |
2119 | done = true; | |
2120 | } else { | |
2121 | done = !mq->rw_wait; | |
2122 | } | |
81196976 | 2123 | mq->waiting = !done; |
f5d72c5c | 2124 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2125 | |
2126 | return done; | |
2127 | } | |
2128 | ||
2129 | static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req) | |
2130 | { | |
2131 | int err = 0; | |
2132 | ||
2133 | wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err)); | |
2134 | ||
2135 | /* Always complete the previous request if there is one */ | |
2136 | mmc_blk_mq_complete_prev_req(mq, prev_req); | |
2137 | ||
2138 | return err; | |
2139 | } | |
2140 | ||
2141 | static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, | |
2142 | struct request *req) | |
2143 | { | |
2144 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2145 | struct mmc_host *host = mq->card->host; | |
2146 | struct request *prev_req = NULL; | |
2147 | int err = 0; | |
2148 | ||
2149 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
2150 | ||
2151 | mqrq->brq.mrq.done = mmc_blk_mq_req_done; | |
2152 | ||
2153 | mmc_pre_req(host, &mqrq->brq.mrq); | |
2154 | ||
2155 | err = mmc_blk_rw_wait(mq, &prev_req); | |
2156 | if (err) | |
2157 | goto out_post_req; | |
2158 | ||
2159 | mq->rw_wait = true; | |
2160 | ||
2161 | err = mmc_start_request(host, &mqrq->brq.mrq); | |
2162 | ||
2163 | if (prev_req) | |
2164 | mmc_blk_mq_post_req(mq, prev_req); | |
2165 | ||
10f21df4 | 2166 | if (err) |
81196976 | 2167 | mq->rw_wait = false; |
10f21df4 AH |
2168 | |
2169 | /* Release re-tuning here where there is no synchronization required */ | |
2170 | if (err || mmc_host_done_complete(host)) | |
81196976 | 2171 | mmc_retune_release(host); |
81196976 AH |
2172 | |
2173 | out_post_req: | |
2174 | if (err) | |
2175 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
2176 | ||
2177 | return err; | |
2178 | } | |
2179 | ||
2180 | static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host) | |
2181 | { | |
1e8e55b6 AH |
2182 | if (mq->use_cqe) |
2183 | return host->cqe_ops->cqe_wait_for_idle(host); | |
2184 | ||
81196976 AH |
2185 | return mmc_blk_rw_wait(mq, NULL); |
2186 | } | |
2187 | ||
2188 | enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) | |
2189 | { | |
2190 | struct mmc_blk_data *md = mq->blkdata; | |
2191 | struct mmc_card *card = md->queue.card; | |
2192 | struct mmc_host *host = card->host; | |
2193 | int ret; | |
2194 | ||
2195 | ret = mmc_blk_part_switch(card, md->part_type); | |
2196 | if (ret) | |
2197 | return MMC_REQ_FAILED_TO_START; | |
2198 | ||
2199 | switch (mmc_issue_type(mq, req)) { | |
2200 | case MMC_ISSUE_SYNC: | |
2201 | ret = mmc_blk_wait_for_idle(mq, host); | |
2202 | if (ret) | |
2203 | return MMC_REQ_BUSY; | |
2204 | switch (req_op(req)) { | |
2205 | case REQ_OP_DRV_IN: | |
2206 | case REQ_OP_DRV_OUT: | |
2207 | mmc_blk_issue_drv_op(mq, req); | |
2208 | break; | |
2209 | case REQ_OP_DISCARD: | |
2210 | mmc_blk_issue_discard_rq(mq, req); | |
2211 | break; | |
2212 | case REQ_OP_SECURE_ERASE: | |
2213 | mmc_blk_issue_secdiscard_rq(mq, req); | |
2214 | break; | |
2215 | case REQ_OP_FLUSH: | |
2216 | mmc_blk_issue_flush(mq, req); | |
2217 | break; | |
2218 | default: | |
2219 | WARN_ON_ONCE(1); | |
2220 | return MMC_REQ_FAILED_TO_START; | |
2221 | } | |
2222 | return MMC_REQ_FINISHED; | |
1e8e55b6 | 2223 | case MMC_ISSUE_DCMD: |
81196976 AH |
2224 | case MMC_ISSUE_ASYNC: |
2225 | switch (req_op(req)) { | |
1e8e55b6 AH |
2226 | case REQ_OP_FLUSH: |
2227 | ret = mmc_blk_cqe_issue_flush(mq, req); | |
2228 | break; | |
81196976 AH |
2229 | case REQ_OP_READ: |
2230 | case REQ_OP_WRITE: | |
1e8e55b6 AH |
2231 | if (mq->use_cqe) |
2232 | ret = mmc_blk_cqe_issue_rw_rq(mq, req); | |
2233 | else | |
2234 | ret = mmc_blk_mq_issue_rw_rq(mq, req); | |
81196976 AH |
2235 | break; |
2236 | default: | |
2237 | WARN_ON_ONCE(1); | |
2238 | ret = -EINVAL; | |
2239 | } | |
2240 | if (!ret) | |
2241 | return MMC_REQ_STARTED; | |
2242 | return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START; | |
2243 | default: | |
2244 | WARN_ON_ONCE(1); | |
2245 | return MMC_REQ_FAILED_TO_START; | |
2246 | } | |
2247 | } | |
2248 | ||
a6f6c96b RK |
2249 | static inline int mmc_blk_readonly(struct mmc_card *card) |
2250 | { | |
2251 | return mmc_card_readonly(card) || | |
2252 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
2253 | } | |
2254 | ||
371a689f AW |
2255 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
2256 | struct device *parent, | |
2257 | sector_t size, | |
2258 | bool default_ro, | |
add710ea JR |
2259 | const char *subname, |
2260 | int area_type) | |
1da177e4 LT |
2261 | { |
2262 | struct mmc_blk_data *md; | |
2263 | int devidx, ret; | |
2264 | ||
a04848c7 | 2265 | devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); |
e7b42769 SL |
2266 | if (devidx < 0) { |
2267 | /* | |
2268 | * We get -ENOSPC because there are no more any available | |
2269 | * devidx. The reason may be that, either userspace haven't yet | |
2270 | * unmounted the partitions, which postpones mmc_blk_release() | |
2271 | * from being called, or the device has more partitions than | |
2272 | * what we support. | |
2273 | */ | |
2274 | if (devidx == -ENOSPC) | |
2275 | dev_err(mmc_dev(card->host), | |
2276 | "no more device IDs available\n"); | |
2277 | ||
a04848c7 | 2278 | return ERR_PTR(devidx); |
e7b42769 | 2279 | } |
1da177e4 | 2280 | |
dd00cc48 | 2281 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
2282 | if (!md) { |
2283 | ret = -ENOMEM; | |
2284 | goto out; | |
2285 | } | |
1da177e4 | 2286 | |
add710ea JR |
2287 | md->area_type = area_type; |
2288 | ||
a6f6c96b RK |
2289 | /* |
2290 | * Set the read-only status based on the supported commands | |
2291 | * and the write protect switch. | |
2292 | */ | |
2293 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 2294 | |
5e71b7a6 | 2295 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
2296 | if (md->disk == NULL) { |
2297 | ret = -ENOMEM; | |
2298 | goto err_kfree; | |
2299 | } | |
1da177e4 | 2300 | |
371a689f | 2301 | INIT_LIST_HEAD(&md->part); |
97548575 | 2302 | INIT_LIST_HEAD(&md->rpmbs); |
a6f6c96b | 2303 | md->usage = 1; |
1da177e4 | 2304 | |
f5d72c5c | 2305 | ret = mmc_init_queue(&md->queue, card); |
a6f6c96b RK |
2306 | if (ret) |
2307 | goto err_putdisk; | |
1da177e4 | 2308 | |
7db3028e | 2309 | md->queue.blkdata = md; |
d2b18394 | 2310 | |
41e3efd0 AH |
2311 | /* |
2312 | * Keep an extra reference to the queue so that we can shutdown the | |
2313 | * queue (i.e. call blk_cleanup_queue()) while there are still | |
2314 | * references to the 'md'. The corresponding blk_put_queue() is in | |
2315 | * mmc_blk_put(). | |
2316 | */ | |
2317 | if (!blk_get_queue(md->queue.queue)) { | |
2318 | mmc_cleanup_queue(&md->queue); | |
2361bfb0 | 2319 | ret = -ENODEV; |
41e3efd0 AH |
2320 | goto err_putdisk; |
2321 | } | |
2322 | ||
fe6b4c88 | 2323 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 2324 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
2325 | md->disk->fops = &mmc_bdops; |
2326 | md->disk->private_data = md; | |
2327 | md->disk->queue = md->queue.queue; | |
307d8e6f | 2328 | md->parent = parent; |
371a689f | 2329 | set_disk_ro(md->disk, md->read_only || default_ro); |
382c55f8 | 2330 | md->disk->flags = GENHD_FL_EXT_DEVT; |
f5b4d71f | 2331 | if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) |
207b652c AG |
2332 | md->disk->flags |= GENHD_FL_NO_PART_SCAN |
2333 | | GENHD_FL_SUPPRESS_PARTITION_INFO; | |
a6f6c96b RK |
2334 | |
2335 | /* | |
2336 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
2337 | * | |
2338 | * - be set for removable media with permanent block devices | |
2339 | * - be unset for removable block devices with permanent media | |
2340 | * | |
2341 | * Since MMC block devices clearly fall under the second | |
2342 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
2343 | * should use the block device creation/destruction hotplug | |
2344 | * messages to tell when the card is present. | |
2345 | */ | |
2346 | ||
f06c9153 | 2347 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
9aaf3437 | 2348 | "mmcblk%u%s", card->host->index, subname ? subname : ""); |
a6f6c96b | 2349 | |
371a689f | 2350 | set_capacity(md->disk, size); |
d0c97cfb | 2351 | |
f0d89972 | 2352 | if (mmc_host_cmd23(card->host)) { |
0ed50abb DG |
2353 | if ((mmc_card_mmc(card) && |
2354 | card->csd.mmca_vsn >= CSD_SPEC_VER_3) || | |
f0d89972 AW |
2355 | (mmc_card_sd(card) && |
2356 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
2357 | md->flags |= MMC_BLK_CMD23; | |
2358 | } | |
d0c97cfb AW |
2359 | |
2360 | if (mmc_card_mmc(card) && | |
2361 | md->flags & MMC_BLK_CMD23 && | |
2362 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || | |
2363 | card->ext_csd.rel_sectors)) { | |
2364 | md->flags |= MMC_BLK_REL_WR; | |
e9d5c746 | 2365 | blk_queue_write_cache(md->queue.queue, true, true); |
d0c97cfb AW |
2366 | } |
2367 | ||
371a689f AW |
2368 | return md; |
2369 | ||
2370 | err_putdisk: | |
2371 | put_disk(md->disk); | |
2372 | err_kfree: | |
2373 | kfree(md); | |
2374 | out: | |
a04848c7 | 2375 | ida_simple_remove(&mmc_blk_ida, devidx); |
371a689f AW |
2376 | return ERR_PTR(ret); |
2377 | } | |
2378 | ||
2379 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
2380 | { | |
2381 | sector_t size; | |
a6f6c96b | 2382 | |
85a18ad9 PO |
2383 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
2384 | /* | |
2385 | * The EXT_CSD sector count is in number or 512 byte | |
2386 | * sectors. | |
2387 | */ | |
371a689f | 2388 | size = card->ext_csd.sectors; |
85a18ad9 PO |
2389 | } else { |
2390 | /* | |
2391 | * The CSD capacity field is in units of read_blkbits. | |
2392 | * set_capacity takes units of 512 bytes. | |
2393 | */ | |
087de9ed KM |
2394 | size = (typeof(sector_t))card->csd.capacity |
2395 | << (card->csd.read_blkbits - 9); | |
85a18ad9 | 2396 | } |
371a689f | 2397 | |
7a30f2af | 2398 | return mmc_blk_alloc_req(card, &card->dev, size, false, NULL, |
add710ea | 2399 | MMC_BLK_DATA_AREA_MAIN); |
371a689f | 2400 | } |
a6f6c96b | 2401 | |
371a689f AW |
2402 | static int mmc_blk_alloc_part(struct mmc_card *card, |
2403 | struct mmc_blk_data *md, | |
2404 | unsigned int part_type, | |
2405 | sector_t size, | |
2406 | bool default_ro, | |
add710ea JR |
2407 | const char *subname, |
2408 | int area_type) | |
371a689f AW |
2409 | { |
2410 | char cap_str[10]; | |
2411 | struct mmc_blk_data *part_md; | |
2412 | ||
2413 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
add710ea | 2414 | subname, area_type); |
371a689f AW |
2415 | if (IS_ERR(part_md)) |
2416 | return PTR_ERR(part_md); | |
2417 | part_md->part_type = part_type; | |
2418 | list_add(&part_md->part, &md->part); | |
2419 | ||
b9f28d86 | 2420 | string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2, |
371a689f | 2421 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2422 | pr_info("%s: %s %s partition %u %s\n", |
371a689f AW |
2423 | part_md->disk->disk_name, mmc_card_id(card), |
2424 | mmc_card_name(card), part_md->part_type, cap_str); | |
2425 | return 0; | |
2426 | } | |
2427 | ||
97548575 LW |
2428 | /** |
2429 | * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev | |
2430 | * @filp: the character device file | |
2431 | * @cmd: the ioctl() command | |
2432 | * @arg: the argument from userspace | |
2433 | * | |
2434 | * This will essentially just redirect the ioctl()s coming in over to | |
2435 | * the main block device spawning the RPMB character device. | |
2436 | */ | |
2437 | static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd, | |
2438 | unsigned long arg) | |
2439 | { | |
2440 | struct mmc_rpmb_data *rpmb = filp->private_data; | |
2441 | int ret; | |
2442 | ||
2443 | switch (cmd) { | |
2444 | case MMC_IOC_CMD: | |
2445 | ret = mmc_blk_ioctl_cmd(rpmb->md, | |
2446 | (struct mmc_ioc_cmd __user *)arg, | |
2447 | rpmb); | |
2448 | break; | |
2449 | case MMC_IOC_MULTI_CMD: | |
2450 | ret = mmc_blk_ioctl_multi_cmd(rpmb->md, | |
2451 | (struct mmc_ioc_multi_cmd __user *)arg, | |
2452 | rpmb); | |
2453 | break; | |
2454 | default: | |
2455 | ret = -EINVAL; | |
2456 | break; | |
2457 | } | |
2458 | ||
b25b750d | 2459 | return ret; |
97548575 LW |
2460 | } |
2461 | ||
2462 | #ifdef CONFIG_COMPAT | |
2463 | static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd, | |
2464 | unsigned long arg) | |
2465 | { | |
2466 | return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
2467 | } | |
2468 | #endif | |
2469 | ||
2470 | static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp) | |
2471 | { | |
2472 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2473 | struct mmc_rpmb_data, chrdev); | |
2474 | ||
2475 | get_device(&rpmb->dev); | |
2476 | filp->private_data = rpmb; | |
1c87f735 | 2477 | mmc_blk_get(rpmb->md->disk); |
97548575 LW |
2478 | |
2479 | return nonseekable_open(inode, filp); | |
2480 | } | |
2481 | ||
2482 | static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp) | |
2483 | { | |
2484 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2485 | struct mmc_rpmb_data, chrdev); | |
2486 | ||
2487 | put_device(&rpmb->dev); | |
1c87f735 | 2488 | mmc_blk_put(rpmb->md); |
97548575 LW |
2489 | |
2490 | return 0; | |
2491 | } | |
2492 | ||
2493 | static const struct file_operations mmc_rpmb_fileops = { | |
2494 | .release = mmc_rpmb_chrdev_release, | |
2495 | .open = mmc_rpmb_chrdev_open, | |
2496 | .owner = THIS_MODULE, | |
2497 | .llseek = no_llseek, | |
2498 | .unlocked_ioctl = mmc_rpmb_ioctl, | |
2499 | #ifdef CONFIG_COMPAT | |
2500 | .compat_ioctl = mmc_rpmb_ioctl_compat, | |
2501 | #endif | |
2502 | }; | |
2503 | ||
1c87f735 LW |
2504 | static void mmc_blk_rpmb_device_release(struct device *dev) |
2505 | { | |
2506 | struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); | |
2507 | ||
2508 | ida_simple_remove(&mmc_rpmb_ida, rpmb->id); | |
2509 | kfree(rpmb); | |
2510 | } | |
97548575 LW |
2511 | |
2512 | static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, | |
2513 | struct mmc_blk_data *md, | |
2514 | unsigned int part_index, | |
2515 | sector_t size, | |
2516 | const char *subname) | |
2517 | { | |
2518 | int devidx, ret; | |
2519 | char rpmb_name[DISK_NAME_LEN]; | |
2520 | char cap_str[10]; | |
2521 | struct mmc_rpmb_data *rpmb; | |
2522 | ||
2523 | /* This creates the minor number for the RPMB char device */ | |
2524 | devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL); | |
2525 | if (devidx < 0) | |
2526 | return devidx; | |
2527 | ||
2528 | rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL); | |
1c87f735 LW |
2529 | if (!rpmb) { |
2530 | ida_simple_remove(&mmc_rpmb_ida, devidx); | |
97548575 | 2531 | return -ENOMEM; |
1c87f735 | 2532 | } |
97548575 LW |
2533 | |
2534 | snprintf(rpmb_name, sizeof(rpmb_name), | |
2535 | "mmcblk%u%s", card->host->index, subname ? subname : ""); | |
2536 | ||
2537 | rpmb->id = devidx; | |
2538 | rpmb->part_index = part_index; | |
2539 | rpmb->dev.init_name = rpmb_name; | |
2540 | rpmb->dev.bus = &mmc_rpmb_bus_type; | |
2541 | rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id); | |
2542 | rpmb->dev.parent = &card->dev; | |
1c87f735 | 2543 | rpmb->dev.release = mmc_blk_rpmb_device_release; |
97548575 LW |
2544 | device_initialize(&rpmb->dev); |
2545 | dev_set_drvdata(&rpmb->dev, rpmb); | |
2546 | rpmb->md = md; | |
2547 | ||
2548 | cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops); | |
2549 | rpmb->chrdev.owner = THIS_MODULE; | |
2550 | ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev); | |
2551 | if (ret) { | |
2552 | pr_err("%s: could not add character device\n", rpmb_name); | |
1c87f735 | 2553 | goto out_put_device; |
97548575 LW |
2554 | } |
2555 | ||
2556 | list_add(&rpmb->node, &md->rpmbs); | |
2557 | ||
2558 | string_get_size((u64)size, 512, STRING_UNITS_2, | |
2559 | cap_str, sizeof(cap_str)); | |
2560 | ||
2561 | pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n", | |
2562 | rpmb_name, mmc_card_id(card), | |
2563 | mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str, | |
2564 | MAJOR(mmc_rpmb_devt), rpmb->id); | |
2565 | ||
2566 | return 0; | |
2567 | ||
1c87f735 LW |
2568 | out_put_device: |
2569 | put_device(&rpmb->dev); | |
97548575 LW |
2570 | return ret; |
2571 | } | |
2572 | ||
2573 | static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb) | |
1c87f735 | 2574 | |
97548575 LW |
2575 | { |
2576 | cdev_device_del(&rpmb->chrdev, &rpmb->dev); | |
1c87f735 | 2577 | put_device(&rpmb->dev); |
97548575 LW |
2578 | } |
2579 | ||
e0c368d5 NJ |
2580 | /* MMC Physical partitions consist of two boot partitions and |
2581 | * up to four general purpose partitions. | |
2582 | * For each partition enabled in EXT_CSD a block device will be allocatedi | |
2583 | * to provide access to the partition. | |
2584 | */ | |
2585 | ||
371a689f AW |
2586 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) |
2587 | { | |
97548575 | 2588 | int idx, ret; |
371a689f AW |
2589 | |
2590 | if (!mmc_card_mmc(card)) | |
2591 | return 0; | |
2592 | ||
e0c368d5 | 2593 | for (idx = 0; idx < card->nr_parts; idx++) { |
97548575 LW |
2594 | if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) { |
2595 | /* | |
2596 | * RPMB partitions does not provide block access, they | |
2597 | * are only accessed using ioctl():s. Thus create | |
2598 | * special RPMB block devices that do not have a | |
2599 | * backing block queue for these. | |
2600 | */ | |
2601 | ret = mmc_blk_alloc_rpmb_part(card, md, | |
2602 | card->part[idx].part_cfg, | |
2603 | card->part[idx].size >> 9, | |
2604 | card->part[idx].name); | |
2605 | if (ret) | |
2606 | return ret; | |
2607 | } else if (card->part[idx].size) { | |
e0c368d5 NJ |
2608 | ret = mmc_blk_alloc_part(card, md, |
2609 | card->part[idx].part_cfg, | |
2610 | card->part[idx].size >> 9, | |
2611 | card->part[idx].force_ro, | |
add710ea JR |
2612 | card->part[idx].name, |
2613 | card->part[idx].area_type); | |
e0c368d5 NJ |
2614 | if (ret) |
2615 | return ret; | |
2616 | } | |
371a689f AW |
2617 | } |
2618 | ||
97548575 | 2619 | return 0; |
1da177e4 LT |
2620 | } |
2621 | ||
371a689f AW |
2622 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
2623 | { | |
add710ea JR |
2624 | struct mmc_card *card; |
2625 | ||
371a689f | 2626 | if (md) { |
fdfa20c1 PT |
2627 | /* |
2628 | * Flush remaining requests and free queues. It | |
2629 | * is freeing the queue that stops new requests | |
2630 | * from being accepted. | |
2631 | */ | |
8efb83a2 | 2632 | card = md->queue.card; |
371a689f AW |
2633 | if (md->disk->flags & GENHD_FL_UP) { |
2634 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
add710ea JR |
2635 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && |
2636 | card->ext_csd.boot_ro_lockable) | |
2637 | device_remove_file(disk_to_dev(md->disk), | |
2638 | &md->power_ro_lock); | |
371a689f | 2639 | |
371a689f AW |
2640 | del_gendisk(md->disk); |
2641 | } | |
57678e5a | 2642 | mmc_cleanup_queue(&md->queue); |
371a689f AW |
2643 | mmc_blk_put(md); |
2644 | } | |
2645 | } | |
2646 | ||
2647 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
2648 | struct mmc_blk_data *md) | |
2649 | { | |
2650 | struct list_head *pos, *q; | |
2651 | struct mmc_blk_data *part_md; | |
97548575 | 2652 | struct mmc_rpmb_data *rpmb; |
371a689f | 2653 | |
97548575 LW |
2654 | /* Remove RPMB partitions */ |
2655 | list_for_each_safe(pos, q, &md->rpmbs) { | |
2656 | rpmb = list_entry(pos, struct mmc_rpmb_data, node); | |
2657 | list_del(pos); | |
2658 | mmc_blk_remove_rpmb_part(rpmb); | |
2659 | } | |
2660 | /* Remove block partitions */ | |
371a689f AW |
2661 | list_for_each_safe(pos, q, &md->part) { |
2662 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
2663 | list_del(pos); | |
2664 | mmc_blk_remove_req(part_md); | |
2665 | } | |
2666 | } | |
2667 | ||
2668 | static int mmc_add_disk(struct mmc_blk_data *md) | |
2669 | { | |
2670 | int ret; | |
add710ea | 2671 | struct mmc_card *card = md->queue.card; |
371a689f | 2672 | |
fef912bf | 2673 | device_add_disk(md->parent, md->disk, NULL); |
371a689f AW |
2674 | md->force_ro.show = force_ro_show; |
2675 | md->force_ro.store = force_ro_store; | |
641c3187 | 2676 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
2677 | md->force_ro.attr.name = "force_ro"; |
2678 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
2679 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
2680 | if (ret) | |
add710ea JR |
2681 | goto force_ro_fail; |
2682 | ||
2683 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && | |
2684 | card->ext_csd.boot_ro_lockable) { | |
88187398 | 2685 | umode_t mode; |
add710ea JR |
2686 | |
2687 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS) | |
2688 | mode = S_IRUGO; | |
2689 | else | |
2690 | mode = S_IRUGO | S_IWUSR; | |
2691 | ||
2692 | md->power_ro_lock.show = power_ro_lock_show; | |
2693 | md->power_ro_lock.store = power_ro_lock_store; | |
00d9ac08 | 2694 | sysfs_attr_init(&md->power_ro_lock.attr); |
add710ea JR |
2695 | md->power_ro_lock.attr.mode = mode; |
2696 | md->power_ro_lock.attr.name = | |
2697 | "ro_lock_until_next_power_on"; | |
2698 | ret = device_create_file(disk_to_dev(md->disk), | |
2699 | &md->power_ro_lock); | |
2700 | if (ret) | |
2701 | goto power_ro_lock_fail; | |
2702 | } | |
2703 | return ret; | |
2704 | ||
2705 | power_ro_lock_fail: | |
2706 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
2707 | force_ro_fail: | |
2708 | del_gendisk(md->disk); | |
371a689f AW |
2709 | |
2710 | return ret; | |
2711 | } | |
2712 | ||
627c3ccf LW |
2713 | #ifdef CONFIG_DEBUG_FS |
2714 | ||
2715 | static int mmc_dbg_card_status_get(void *data, u64 *val) | |
2716 | { | |
2717 | struct mmc_card *card = data; | |
2718 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2719 | struct mmc_queue *mq = &md->queue; | |
2720 | struct request *req; | |
2721 | int ret; | |
2722 | ||
2723 | /* Ask the block layer about the card status */ | |
ff005a06 | 2724 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2725 | if (IS_ERR(req)) |
2726 | return PTR_ERR(req); | |
627c3ccf LW |
2727 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS; |
2728 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2729 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
2730 | if (ret >= 0) { | |
2731 | *val = ret; | |
2732 | ret = 0; | |
2733 | } | |
34c089e8 | 2734 | blk_put_request(req); |
627c3ccf LW |
2735 | |
2736 | return ret; | |
2737 | } | |
f6a3d9d9 Y |
2738 | DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get, |
2739 | NULL, "%08llx\n"); | |
627c3ccf LW |
2740 | |
2741 | /* That is two digits * 512 + 1 for newline */ | |
2742 | #define EXT_CSD_STR_LEN 1025 | |
2743 | ||
2744 | static int mmc_ext_csd_open(struct inode *inode, struct file *filp) | |
2745 | { | |
2746 | struct mmc_card *card = inode->i_private; | |
2747 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2748 | struct mmc_queue *mq = &md->queue; | |
2749 | struct request *req; | |
2750 | char *buf; | |
2751 | ssize_t n = 0; | |
2752 | u8 *ext_csd; | |
2753 | int err, i; | |
2754 | ||
2755 | buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL); | |
2756 | if (!buf) | |
2757 | return -ENOMEM; | |
2758 | ||
2759 | /* Ask the block layer for the EXT CSD */ | |
ff005a06 | 2760 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2761 | if (IS_ERR(req)) { |
2762 | err = PTR_ERR(req); | |
2763 | goto out_free; | |
2764 | } | |
627c3ccf LW |
2765 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD; |
2766 | req_to_mmc_queue_req(req)->drv_op_data = &ext_csd; | |
2767 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2768 | err = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 2769 | blk_put_request(req); |
627c3ccf LW |
2770 | if (err) { |
2771 | pr_err("FAILED %d\n", err); | |
2772 | goto out_free; | |
2773 | } | |
2774 | ||
2775 | for (i = 0; i < 512; i++) | |
2776 | n += sprintf(buf + n, "%02x", ext_csd[i]); | |
2777 | n += sprintf(buf + n, "\n"); | |
2778 | ||
2779 | if (n != EXT_CSD_STR_LEN) { | |
2780 | err = -EINVAL; | |
0be55579 | 2781 | kfree(ext_csd); |
627c3ccf LW |
2782 | goto out_free; |
2783 | } | |
2784 | ||
2785 | filp->private_data = buf; | |
2786 | kfree(ext_csd); | |
2787 | return 0; | |
2788 | ||
2789 | out_free: | |
2790 | kfree(buf); | |
2791 | return err; | |
2792 | } | |
2793 | ||
2794 | static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf, | |
2795 | size_t cnt, loff_t *ppos) | |
2796 | { | |
2797 | char *buf = filp->private_data; | |
2798 | ||
2799 | return simple_read_from_buffer(ubuf, cnt, ppos, | |
2800 | buf, EXT_CSD_STR_LEN); | |
2801 | } | |
2802 | ||
2803 | static int mmc_ext_csd_release(struct inode *inode, struct file *file) | |
2804 | { | |
2805 | kfree(file->private_data); | |
2806 | return 0; | |
2807 | } | |
2808 | ||
2809 | static const struct file_operations mmc_dbg_ext_csd_fops = { | |
2810 | .open = mmc_ext_csd_open, | |
2811 | .read = mmc_ext_csd_read, | |
2812 | .release = mmc_ext_csd_release, | |
2813 | .llseek = default_llseek, | |
2814 | }; | |
2815 | ||
f9f0da98 | 2816 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2817 | { |
2818 | struct dentry *root; | |
2819 | ||
2820 | if (!card->debugfs_root) | |
2821 | return 0; | |
2822 | ||
2823 | root = card->debugfs_root; | |
2824 | ||
2825 | if (mmc_card_mmc(card) || mmc_card_sd(card)) { | |
f9f0da98 | 2826 | md->status_dentry = |
f6a3d9d9 Y |
2827 | debugfs_create_file_unsafe("status", 0400, root, |
2828 | card, | |
2829 | &mmc_dbg_card_status_fops); | |
f9f0da98 | 2830 | if (!md->status_dentry) |
627c3ccf LW |
2831 | return -EIO; |
2832 | } | |
2833 | ||
2834 | if (mmc_card_mmc(card)) { | |
f9f0da98 AH |
2835 | md->ext_csd_dentry = |
2836 | debugfs_create_file("ext_csd", S_IRUSR, root, card, | |
2837 | &mmc_dbg_ext_csd_fops); | |
2838 | if (!md->ext_csd_dentry) | |
627c3ccf LW |
2839 | return -EIO; |
2840 | } | |
2841 | ||
2842 | return 0; | |
2843 | } | |
2844 | ||
f9f0da98 AH |
2845 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2846 | struct mmc_blk_data *md) | |
2847 | { | |
2848 | if (!card->debugfs_root) | |
2849 | return; | |
2850 | ||
2851 | if (!IS_ERR_OR_NULL(md->status_dentry)) { | |
2852 | debugfs_remove(md->status_dentry); | |
2853 | md->status_dentry = NULL; | |
2854 | } | |
2855 | ||
2856 | if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) { | |
2857 | debugfs_remove(md->ext_csd_dentry); | |
2858 | md->ext_csd_dentry = NULL; | |
2859 | } | |
2860 | } | |
627c3ccf LW |
2861 | |
2862 | #else | |
2863 | ||
f9f0da98 | 2864 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2865 | { |
2866 | return 0; | |
2867 | } | |
2868 | ||
f9f0da98 AH |
2869 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2870 | struct mmc_blk_data *md) | |
2871 | { | |
2872 | } | |
2873 | ||
627c3ccf LW |
2874 | #endif /* CONFIG_DEBUG_FS */ |
2875 | ||
96541bac | 2876 | static int mmc_blk_probe(struct mmc_card *card) |
1da177e4 | 2877 | { |
371a689f | 2878 | struct mmc_blk_data *md, *part_md; |
a7bbb573 PO |
2879 | char cap_str[10]; |
2880 | ||
912490db PO |
2881 | /* |
2882 | * Check that the card supports the command class(es) we need. | |
2883 | */ | |
2884 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
2885 | return -ENODEV; |
2886 | ||
8c7cdbf9 | 2887 | mmc_fixup_device(card, mmc_blk_fixups); |
5204d00f | 2888 | |
dcf6e2e3 ZH |
2889 | card->complete_wq = alloc_workqueue("mmc_complete", |
2890 | WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); | |
2891 | if (unlikely(!card->complete_wq)) { | |
2892 | pr_err("Failed to create mmc completion workqueue"); | |
2893 | return -ENOMEM; | |
2894 | } | |
2895 | ||
1da177e4 | 2896 | md = mmc_blk_alloc(card); |
304419d8 | 2897 | if (IS_ERR(md)) |
1da177e4 LT |
2898 | return PTR_ERR(md); |
2899 | ||
b9f28d86 | 2900 | string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, |
a7bbb573 | 2901 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2902 | pr_info("%s: %s %s %s %s\n", |
1da177e4 | 2903 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 2904 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 2905 | |
371a689f AW |
2906 | if (mmc_blk_alloc_parts(card, md)) |
2907 | goto out; | |
2908 | ||
96541bac | 2909 | dev_set_drvdata(&card->dev, md); |
6f60c222 | 2910 | |
371a689f AW |
2911 | if (mmc_add_disk(md)) |
2912 | goto out; | |
2913 | ||
2914 | list_for_each_entry(part_md, &md->part, part) { | |
2915 | if (mmc_add_disk(part_md)) | |
2916 | goto out; | |
2917 | } | |
e94cfef6 | 2918 | |
627c3ccf | 2919 | /* Add two debugfs entries */ |
f9f0da98 | 2920 | mmc_blk_add_debugfs(card, md); |
627c3ccf | 2921 | |
e94cfef6 UH |
2922 | pm_runtime_set_autosuspend_delay(&card->dev, 3000); |
2923 | pm_runtime_use_autosuspend(&card->dev); | |
2924 | ||
2925 | /* | |
2926 | * Don't enable runtime PM for SD-combo cards here. Leave that | |
2927 | * decision to be taken during the SDIO init sequence instead. | |
2928 | */ | |
2929 | if (card->type != MMC_TYPE_SD_COMBO) { | |
2930 | pm_runtime_set_active(&card->dev); | |
2931 | pm_runtime_enable(&card->dev); | |
2932 | } | |
2933 | ||
1da177e4 LT |
2934 | return 0; |
2935 | ||
2936 | out: | |
371a689f AW |
2937 | mmc_blk_remove_parts(card, md); |
2938 | mmc_blk_remove_req(md); | |
5865f287 | 2939 | return 0; |
1da177e4 LT |
2940 | } |
2941 | ||
96541bac | 2942 | static void mmc_blk_remove(struct mmc_card *card) |
1da177e4 | 2943 | { |
96541bac | 2944 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 | 2945 | |
f9f0da98 | 2946 | mmc_blk_remove_debugfs(card, md); |
371a689f | 2947 | mmc_blk_remove_parts(card, md); |
e94cfef6 | 2948 | pm_runtime_get_sync(&card->dev); |
65f9e20e SL |
2949 | if (md->part_curr != md->part_type) { |
2950 | mmc_claim_host(card->host); | |
2951 | mmc_blk_part_switch(card, md->part_type); | |
2952 | mmc_release_host(card->host); | |
2953 | } | |
e94cfef6 UH |
2954 | if (card->type != MMC_TYPE_SD_COMBO) |
2955 | pm_runtime_disable(&card->dev); | |
2956 | pm_runtime_put_noidle(&card->dev); | |
371a689f | 2957 | mmc_blk_remove_req(md); |
96541bac | 2958 | dev_set_drvdata(&card->dev, NULL); |
dcf6e2e3 | 2959 | destroy_workqueue(card->complete_wq); |
1da177e4 LT |
2960 | } |
2961 | ||
96541bac | 2962 | static int _mmc_blk_suspend(struct mmc_card *card) |
1da177e4 | 2963 | { |
371a689f | 2964 | struct mmc_blk_data *part_md; |
96541bac | 2965 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 LT |
2966 | |
2967 | if (md) { | |
2968 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
2969 | list_for_each_entry(part_md, &md->part, part) { |
2970 | mmc_queue_suspend(&part_md->queue); | |
2971 | } | |
1da177e4 LT |
2972 | } |
2973 | return 0; | |
2974 | } | |
2975 | ||
96541bac | 2976 | static void mmc_blk_shutdown(struct mmc_card *card) |
76287748 | 2977 | { |
96541bac | 2978 | _mmc_blk_suspend(card); |
76287748 UH |
2979 | } |
2980 | ||
0967edc6 UH |
2981 | #ifdef CONFIG_PM_SLEEP |
2982 | static int mmc_blk_suspend(struct device *dev) | |
76287748 | 2983 | { |
96541bac UH |
2984 | struct mmc_card *card = mmc_dev_to_card(dev); |
2985 | ||
2986 | return _mmc_blk_suspend(card); | |
76287748 UH |
2987 | } |
2988 | ||
0967edc6 | 2989 | static int mmc_blk_resume(struct device *dev) |
1da177e4 | 2990 | { |
371a689f | 2991 | struct mmc_blk_data *part_md; |
fc95e30b | 2992 | struct mmc_blk_data *md = dev_get_drvdata(dev); |
1da177e4 LT |
2993 | |
2994 | if (md) { | |
371a689f AW |
2995 | /* |
2996 | * Resume involves the card going into idle state, | |
2997 | * so current partition is always the main one. | |
2998 | */ | |
2999 | md->part_curr = md->part_type; | |
1da177e4 | 3000 | mmc_queue_resume(&md->queue); |
371a689f AW |
3001 | list_for_each_entry(part_md, &md->part, part) { |
3002 | mmc_queue_resume(&part_md->queue); | |
3003 | } | |
1da177e4 LT |
3004 | } |
3005 | return 0; | |
3006 | } | |
1da177e4 LT |
3007 | #endif |
3008 | ||
0967edc6 UH |
3009 | static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume); |
3010 | ||
96541bac UH |
3011 | static struct mmc_driver mmc_driver = { |
3012 | .drv = { | |
3013 | .name = "mmcblk", | |
3014 | .pm = &mmc_blk_pm_ops, | |
3015 | }, | |
1da177e4 LT |
3016 | .probe = mmc_blk_probe, |
3017 | .remove = mmc_blk_remove, | |
76287748 | 3018 | .shutdown = mmc_blk_shutdown, |
1da177e4 LT |
3019 | }; |
3020 | ||
3021 | static int __init mmc_blk_init(void) | |
3022 | { | |
9d4e98e9 | 3023 | int res; |
1da177e4 | 3024 | |
97548575 LW |
3025 | res = bus_register(&mmc_rpmb_bus_type); |
3026 | if (res < 0) { | |
3027 | pr_err("mmcblk: could not register RPMB bus type\n"); | |
3028 | return res; | |
3029 | } | |
3030 | res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb"); | |
3031 | if (res < 0) { | |
3032 | pr_err("mmcblk: failed to allocate rpmb chrdev region\n"); | |
3033 | goto out_bus_unreg; | |
3034 | } | |
3035 | ||
5e71b7a6 OJ |
3036 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
3037 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
3038 | ||
a26eba61 | 3039 | max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors); |
5e71b7a6 | 3040 | |
fe6b4c88 PO |
3041 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
3042 | if (res) | |
97548575 | 3043 | goto out_chrdev_unreg; |
1da177e4 | 3044 | |
9d4e98e9 AM |
3045 | res = mmc_register_driver(&mmc_driver); |
3046 | if (res) | |
97548575 | 3047 | goto out_blkdev_unreg; |
1da177e4 | 3048 | |
9d4e98e9 | 3049 | return 0; |
97548575 LW |
3050 | |
3051 | out_blkdev_unreg: | |
9d4e98e9 | 3052 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 LW |
3053 | out_chrdev_unreg: |
3054 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); | |
3055 | out_bus_unreg: | |
3056 | bus_unregister(&mmc_rpmb_bus_type); | |
1da177e4 LT |
3057 | return res; |
3058 | } | |
3059 | ||
3060 | static void __exit mmc_blk_exit(void) | |
3061 | { | |
3062 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 3063 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 | 3064 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); |
d0a0852b | 3065 | bus_unregister(&mmc_rpmb_bus_type); |
1da177e4 LT |
3066 | } |
3067 | ||
3068 | module_init(mmc_blk_init); | |
3069 | module_exit(mmc_blk_exit); | |
3070 | ||
3071 | MODULE_LICENSE("GPL"); | |
3072 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
3073 |