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 ME |
73 | #define MMC_SANITIZE_REQ_TIMEOUT 240000 |
74 | #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) | |
a0e95766 | 75 | #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) |
6a7a6b45 | 76 | |
d3df0465 | 77 | #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \ |
ce39f9d1 | 78 | (rq_data_dir(req) == WRITE)) |
5e71b7a6 | 79 | static DEFINE_MUTEX(block_mutex); |
6b0b6285 | 80 | |
1da177e4 | 81 | /* |
5e71b7a6 OJ |
82 | * The defaults come from config options but can be overriden by module |
83 | * or bootarg options. | |
1da177e4 | 84 | */ |
5e71b7a6 | 85 | static int perdev_minors = CONFIG_MMC_BLOCK_MINORS; |
1dff3144 | 86 | |
5e71b7a6 OJ |
87 | /* |
88 | * We've only got one major, so number of mmcblk devices is | |
a26eba61 | 89 | * limited to (1 << 20) / number of minors per device. It is also |
b10fa99e | 90 | * limited by the MAX_DEVICES below. |
5e71b7a6 OJ |
91 | */ |
92 | static int max_devices; | |
93 | ||
a26eba61 BH |
94 | #define MAX_DEVICES 256 |
95 | ||
b10fa99e | 96 | static DEFINE_IDA(mmc_blk_ida); |
97548575 | 97 | static DEFINE_IDA(mmc_rpmb_ida); |
1da177e4 | 98 | |
1da177e4 LT |
99 | /* |
100 | * There is one mmc_blk_data per slot. | |
101 | */ | |
102 | struct mmc_blk_data { | |
307d8e6f | 103 | struct device *parent; |
1da177e4 LT |
104 | struct gendisk *disk; |
105 | struct mmc_queue queue; | |
371a689f | 106 | struct list_head part; |
97548575 | 107 | struct list_head rpmbs; |
1da177e4 | 108 | |
d0c97cfb AW |
109 | unsigned int flags; |
110 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
111 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
112 | ||
1da177e4 | 113 | unsigned int usage; |
a6f6c96b | 114 | unsigned int read_only; |
371a689f | 115 | unsigned int part_type; |
67716327 AH |
116 | unsigned int reset_done; |
117 | #define MMC_BLK_READ BIT(0) | |
118 | #define MMC_BLK_WRITE BIT(1) | |
119 | #define MMC_BLK_DISCARD BIT(2) | |
120 | #define MMC_BLK_SECDISCARD BIT(3) | |
1e8e55b6 | 121 | #define MMC_BLK_CQE_RECOVERY BIT(4) |
371a689f AW |
122 | |
123 | /* | |
124 | * Only set in main mmc_blk_data associated | |
fc95e30b | 125 | * with mmc_card with dev_set_drvdata, and keeps |
371a689f AW |
126 | * track of the current selected device partition. |
127 | */ | |
128 | unsigned int part_curr; | |
129 | struct device_attribute force_ro; | |
add710ea JR |
130 | struct device_attribute power_ro_lock; |
131 | int area_type; | |
f9f0da98 AH |
132 | |
133 | /* debugfs files (only in main mmc_blk_data) */ | |
134 | struct dentry *status_dentry; | |
135 | struct dentry *ext_csd_dentry; | |
1da177e4 LT |
136 | }; |
137 | ||
97548575 LW |
138 | /* Device type for RPMB character devices */ |
139 | static dev_t mmc_rpmb_devt; | |
140 | ||
141 | /* Bus type for RPMB character devices */ | |
142 | static struct bus_type mmc_rpmb_bus_type = { | |
143 | .name = "mmc_rpmb", | |
144 | }; | |
145 | ||
146 | /** | |
147 | * struct mmc_rpmb_data - special RPMB device type for these areas | |
148 | * @dev: the device for the RPMB area | |
149 | * @chrdev: character device for the RPMB area | |
150 | * @id: unique device ID number | |
151 | * @part_index: partition index (0 on first) | |
152 | * @md: parent MMC block device | |
153 | * @node: list item, so we can put this device on a list | |
154 | */ | |
155 | struct mmc_rpmb_data { | |
156 | struct device dev; | |
157 | struct cdev chrdev; | |
158 | int id; | |
159 | unsigned int part_index; | |
160 | struct mmc_blk_data *md; | |
161 | struct list_head node; | |
162 | }; | |
163 | ||
a621aaed | 164 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 165 | |
5e71b7a6 OJ |
166 | module_param(perdev_minors, int, 0444); |
167 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
168 | ||
8d1e977d | 169 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 170 | unsigned int part_type); |
511ce378 BW |
171 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
172 | struct mmc_card *card, | |
173 | int disable_multi, | |
174 | struct mmc_queue *mq); | |
175 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq); | |
cdf8a6fb | 176 | |
1da177e4 LT |
177 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
178 | { | |
179 | struct mmc_blk_data *md; | |
180 | ||
a621aaed | 181 | mutex_lock(&open_lock); |
1da177e4 LT |
182 | md = disk->private_data; |
183 | if (md && md->usage == 0) | |
184 | md = NULL; | |
185 | if (md) | |
186 | md->usage++; | |
a621aaed | 187 | mutex_unlock(&open_lock); |
1da177e4 LT |
188 | |
189 | return md; | |
190 | } | |
191 | ||
371a689f AW |
192 | static inline int mmc_get_devidx(struct gendisk *disk) |
193 | { | |
382c55f8 | 194 | int devidx = disk->first_minor / perdev_minors; |
371a689f AW |
195 | return devidx; |
196 | } | |
197 | ||
1da177e4 LT |
198 | static void mmc_blk_put(struct mmc_blk_data *md) |
199 | { | |
a621aaed | 200 | mutex_lock(&open_lock); |
1da177e4 LT |
201 | md->usage--; |
202 | if (md->usage == 0) { | |
371a689f | 203 | int devidx = mmc_get_devidx(md->disk); |
41e3efd0 | 204 | blk_put_queue(md->queue.queue); |
a04848c7 | 205 | ida_simple_remove(&mmc_blk_ida, devidx); |
1da177e4 | 206 | put_disk(md->disk); |
1da177e4 LT |
207 | kfree(md); |
208 | } | |
a621aaed | 209 | mutex_unlock(&open_lock); |
1da177e4 LT |
210 | } |
211 | ||
add710ea JR |
212 | static ssize_t power_ro_lock_show(struct device *dev, |
213 | struct device_attribute *attr, char *buf) | |
214 | { | |
215 | int ret; | |
216 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
217 | struct mmc_card *card = md->queue.card; | |
218 | int locked = 0; | |
219 | ||
220 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN) | |
221 | locked = 2; | |
222 | else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) | |
223 | locked = 1; | |
224 | ||
225 | ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); | |
226 | ||
9098f84c TW |
227 | mmc_blk_put(md); |
228 | ||
add710ea JR |
229 | return ret; |
230 | } | |
231 | ||
232 | static ssize_t power_ro_lock_store(struct device *dev, | |
233 | struct device_attribute *attr, const char *buf, size_t count) | |
234 | { | |
235 | int ret; | |
236 | struct mmc_blk_data *md, *part_md; | |
0493f6fe LW |
237 | struct mmc_queue *mq; |
238 | struct request *req; | |
add710ea JR |
239 | unsigned long set; |
240 | ||
241 | if (kstrtoul(buf, 0, &set)) | |
242 | return -EINVAL; | |
243 | ||
244 | if (set != 1) | |
245 | return count; | |
246 | ||
247 | md = mmc_blk_get(dev_to_disk(dev)); | |
0493f6fe | 248 | mq = &md->queue; |
add710ea | 249 | |
0493f6fe | 250 | /* Dispatch locking to the block layer */ |
ff005a06 | 251 | req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0); |
fb8e456e AH |
252 | if (IS_ERR(req)) { |
253 | count = PTR_ERR(req); | |
254 | goto out_put; | |
255 | } | |
0493f6fe LW |
256 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; |
257 | blk_execute_rq(mq->queue, NULL, req, 0); | |
258 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 259 | blk_put_request(req); |
add710ea JR |
260 | |
261 | if (!ret) { | |
262 | pr_info("%s: Locking boot partition ro until next power on\n", | |
263 | md->disk->disk_name); | |
264 | set_disk_ro(md->disk, 1); | |
265 | ||
266 | list_for_each_entry(part_md, &md->part, part) | |
267 | if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) { | |
268 | pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name); | |
269 | set_disk_ro(part_md->disk, 1); | |
270 | } | |
271 | } | |
fb8e456e | 272 | out_put: |
add710ea JR |
273 | mmc_blk_put(md); |
274 | return count; | |
275 | } | |
276 | ||
371a689f AW |
277 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
278 | char *buf) | |
279 | { | |
280 | int ret; | |
281 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
282 | ||
0031a98a | 283 | ret = snprintf(buf, PAGE_SIZE, "%d\n", |
371a689f AW |
284 | get_disk_ro(dev_to_disk(dev)) ^ |
285 | md->read_only); | |
286 | mmc_blk_put(md); | |
287 | return ret; | |
288 | } | |
289 | ||
290 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
291 | const char *buf, size_t count) | |
292 | { | |
293 | int ret; | |
294 | char *end; | |
295 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
296 | unsigned long set = simple_strtoul(buf, &end, 0); | |
297 | if (end == buf) { | |
298 | ret = -EINVAL; | |
299 | goto out; | |
300 | } | |
301 | ||
302 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
303 | ret = count; | |
304 | out: | |
305 | mmc_blk_put(md); | |
306 | return ret; | |
307 | } | |
308 | ||
a5a1561f | 309 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 310 | { |
a5a1561f | 311 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
312 | int ret = -ENXIO; |
313 | ||
2a48fc0a | 314 | mutex_lock(&block_mutex); |
1da177e4 LT |
315 | if (md) { |
316 | if (md->usage == 2) | |
a5a1561f | 317 | check_disk_change(bdev); |
1da177e4 | 318 | ret = 0; |
a00fc090 | 319 | |
a5a1561f | 320 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 321 | mmc_blk_put(md); |
a00fc090 | 322 | ret = -EROFS; |
70bb0896 | 323 | } |
1da177e4 | 324 | } |
2a48fc0a | 325 | mutex_unlock(&block_mutex); |
1da177e4 LT |
326 | |
327 | return ret; | |
328 | } | |
329 | ||
db2a144b | 330 | static void mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 331 | { |
a5a1561f | 332 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 333 | |
2a48fc0a | 334 | mutex_lock(&block_mutex); |
1da177e4 | 335 | mmc_blk_put(md); |
2a48fc0a | 336 | mutex_unlock(&block_mutex); |
1da177e4 LT |
337 | } |
338 | ||
339 | static int | |
a885c8c4 | 340 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 341 | { |
a885c8c4 CH |
342 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
343 | geo->heads = 4; | |
344 | geo->sectors = 16; | |
345 | return 0; | |
1da177e4 LT |
346 | } |
347 | ||
cb87ea28 JC |
348 | struct mmc_blk_ioc_data { |
349 | struct mmc_ioc_cmd ic; | |
350 | unsigned char *buf; | |
351 | u64 buf_bytes; | |
97548575 | 352 | struct mmc_rpmb_data *rpmb; |
cb87ea28 JC |
353 | }; |
354 | ||
355 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
356 | struct mmc_ioc_cmd __user *user) | |
357 | { | |
358 | struct mmc_blk_ioc_data *idata; | |
359 | int err; | |
360 | ||
1ff8950c | 361 | idata = kmalloc(sizeof(*idata), GFP_KERNEL); |
cb87ea28 JC |
362 | if (!idata) { |
363 | err = -ENOMEM; | |
aea253ec | 364 | goto out; |
cb87ea28 JC |
365 | } |
366 | ||
367 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
368 | err = -EFAULT; | |
aea253ec | 369 | goto idata_err; |
cb87ea28 JC |
370 | } |
371 | ||
372 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
373 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
374 | err = -EOVERFLOW; | |
aea253ec | 375 | goto idata_err; |
cb87ea28 JC |
376 | } |
377 | ||
bfe5b1b1 VV |
378 | if (!idata->buf_bytes) { |
379 | idata->buf = NULL; | |
4d6144de | 380 | return idata; |
bfe5b1b1 | 381 | } |
4d6144de | 382 | |
97a0c313 ME |
383 | idata->buf = memdup_user((void __user *)(unsigned long) |
384 | idata->ic.data_ptr, idata->buf_bytes); | |
385 | if (IS_ERR(idata->buf)) { | |
386 | err = PTR_ERR(idata->buf); | |
aea253ec | 387 | goto idata_err; |
cb87ea28 JC |
388 | } |
389 | ||
cb87ea28 JC |
390 | return idata; |
391 | ||
aea253ec | 392 | idata_err: |
cb87ea28 | 393 | kfree(idata); |
aea253ec | 394 | out: |
cb87ea28 | 395 | return ERR_PTR(err); |
cb87ea28 JC |
396 | } |
397 | ||
a5f5774c JH |
398 | static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, |
399 | struct mmc_blk_ioc_data *idata) | |
400 | { | |
401 | struct mmc_ioc_cmd *ic = &idata->ic; | |
402 | ||
403 | if (copy_to_user(&(ic_ptr->response), ic->response, | |
404 | sizeof(ic->response))) | |
405 | return -EFAULT; | |
406 | ||
407 | if (!idata->ic.write_flag) { | |
408 | if (copy_to_user((void __user *)(unsigned long)ic->data_ptr, | |
409 | idata->buf, idata->buf_bytes)) | |
410 | return -EFAULT; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
775a9362 ME |
416 | static int ioctl_do_sanitize(struct mmc_card *card) |
417 | { | |
418 | int err; | |
419 | ||
a2d1086d | 420 | if (!mmc_can_sanitize(card)) { |
775a9362 ME |
421 | pr_warn("%s: %s - SANITIZE is not supported\n", |
422 | mmc_hostname(card->host), __func__); | |
423 | err = -EOPNOTSUPP; | |
424 | goto out; | |
425 | } | |
426 | ||
427 | pr_debug("%s: %s - SANITIZE IN PROGRESS...\n", | |
428 | mmc_hostname(card->host), __func__); | |
429 | ||
430 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
431 | EXT_CSD_SANITIZE_START, 1, | |
432 | MMC_SANITIZE_REQ_TIMEOUT); | |
433 | ||
434 | if (err) | |
435 | pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n", | |
436 | mmc_hostname(card->host), __func__, err); | |
437 | ||
438 | pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host), | |
439 | __func__); | |
440 | out: | |
441 | return err; | |
442 | } | |
443 | ||
a0d4c7eb CJ |
444 | static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, |
445 | u32 *resp_errs) | |
446 | { | |
447 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); | |
448 | int err = 0; | |
449 | u32 status; | |
450 | ||
451 | do { | |
452 | bool done = time_after(jiffies, timeout); | |
453 | ||
454 | err = __mmc_send_status(card, &status, 5); | |
455 | if (err) { | |
456 | dev_err(mmc_dev(card->host), | |
457 | "error %d requesting status\n", err); | |
458 | return err; | |
459 | } | |
460 | ||
461 | /* Accumulate any response error bits seen */ | |
462 | if (resp_errs) | |
463 | *resp_errs |= status; | |
464 | ||
465 | /* | |
466 | * Timeout if the device never becomes ready for data and never | |
467 | * leaves the program state. | |
468 | */ | |
469 | if (done) { | |
470 | dev_err(mmc_dev(card->host), | |
471 | "Card stuck in wrong state! %s status: %#x\n", | |
472 | __func__, status); | |
473 | return -ETIMEDOUT; | |
474 | } | |
40c96853 | 475 | } while (!mmc_ready_for_data(status)); |
a0d4c7eb CJ |
476 | |
477 | return err; | |
478 | } | |
479 | ||
a5f5774c JH |
480 | static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, |
481 | struct mmc_blk_ioc_data *idata) | |
cb87ea28 | 482 | { |
a44f7cb9 | 483 | struct mmc_command cmd = {}, sbc = {}; |
c7836d15 MY |
484 | struct mmc_data data = {}; |
485 | struct mmc_request mrq = {}; | |
cb87ea28 JC |
486 | struct scatterlist sg; |
487 | int err; | |
97548575 | 488 | unsigned int target_part; |
cb87ea28 | 489 | |
a5f5774c JH |
490 | if (!card || !md || !idata) |
491 | return -EINVAL; | |
cb87ea28 | 492 | |
97548575 LW |
493 | /* |
494 | * The RPMB accesses comes in from the character device, so we | |
495 | * need to target these explicitly. Else we just target the | |
496 | * partition type for the block device the ioctl() was issued | |
497 | * on. | |
498 | */ | |
499 | if (idata->rpmb) { | |
500 | /* Support multiple RPMB partitions */ | |
501 | target_part = idata->rpmb->part_index; | |
502 | target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB; | |
503 | } else { | |
504 | target_part = md->part_type; | |
505 | } | |
8d1e977d | 506 | |
4d6144de JR |
507 | cmd.opcode = idata->ic.opcode; |
508 | cmd.arg = idata->ic.arg; | |
509 | cmd.flags = idata->ic.flags; | |
510 | ||
511 | if (idata->buf_bytes) { | |
512 | data.sg = &sg; | |
513 | data.sg_len = 1; | |
514 | data.blksz = idata->ic.blksz; | |
515 | data.blocks = idata->ic.blocks; | |
516 | ||
517 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
518 | ||
519 | if (idata->ic.write_flag) | |
520 | data.flags = MMC_DATA_WRITE; | |
521 | else | |
522 | data.flags = MMC_DATA_READ; | |
523 | ||
524 | /* data.flags must already be set before doing this. */ | |
525 | mmc_set_data_timeout(&data, card); | |
526 | ||
527 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
528 | if (idata->ic.data_timeout_ns) | |
529 | data.timeout_ns = idata->ic.data_timeout_ns; | |
530 | ||
531 | if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { | |
532 | /* | |
533 | * Pretend this is a data transfer and rely on the | |
534 | * host driver to compute timeout. When all host | |
535 | * drivers support cmd.cmd_timeout for R1B, this | |
536 | * can be changed to: | |
537 | * | |
538 | * mrq.data = NULL; | |
539 | * cmd.cmd_timeout = idata->ic.cmd_timeout_ms; | |
540 | */ | |
541 | data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000; | |
542 | } | |
543 | ||
544 | mrq.data = &data; | |
545 | } | |
546 | ||
547 | mrq.cmd = &cmd; | |
548 | ||
97548575 | 549 | err = mmc_blk_part_switch(card, target_part); |
8d1e977d | 550 | if (err) |
a5f5774c | 551 | return err; |
8d1e977d | 552 | |
cb87ea28 JC |
553 | if (idata->ic.is_acmd) { |
554 | err = mmc_app_cmd(card->host, card); | |
555 | if (err) | |
a5f5774c | 556 | return err; |
cb87ea28 JC |
557 | } |
558 | ||
97548575 | 559 | if (idata->rpmb) { |
a44f7cb9 WS |
560 | sbc.opcode = MMC_SET_BLOCK_COUNT; |
561 | /* | |
562 | * We don't do any blockcount validation because the max size | |
563 | * may be increased by a future standard. We just copy the | |
564 | * 'Reliable Write' bit here. | |
565 | */ | |
566 | sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31)); | |
567 | sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
568 | mrq.sbc = &sbc; | |
8d1e977d LP |
569 | } |
570 | ||
a82e484e YG |
571 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) && |
572 | (cmd.opcode == MMC_SWITCH)) { | |
775a9362 ME |
573 | err = ioctl_do_sanitize(card); |
574 | ||
575 | if (err) | |
576 | pr_err("%s: ioctl_do_sanitize() failed. err = %d", | |
577 | __func__, err); | |
578 | ||
a5f5774c | 579 | return err; |
775a9362 ME |
580 | } |
581 | ||
cb87ea28 JC |
582 | mmc_wait_for_req(card->host, &mrq); |
583 | ||
584 | if (cmd.error) { | |
585 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
586 | __func__, cmd.error); | |
a5f5774c | 587 | return cmd.error; |
cb87ea28 JC |
588 | } |
589 | if (data.error) { | |
590 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
591 | __func__, data.error); | |
a5f5774c | 592 | return data.error; |
cb87ea28 JC |
593 | } |
594 | ||
a0e95766 BS |
595 | /* |
596 | * Make sure the cache of the PARTITION_CONFIG register and | |
597 | * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write | |
598 | * changed it successfully. | |
599 | */ | |
600 | if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) && | |
601 | (cmd.opcode == MMC_SWITCH)) { | |
602 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); | |
603 | u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg); | |
604 | ||
605 | /* | |
606 | * Update cache so the next mmc_blk_part_switch call operates | |
607 | * on up-to-date data. | |
608 | */ | |
609 | card->ext_csd.part_config = value; | |
610 | main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK; | |
611 | } | |
612 | ||
cb87ea28 JC |
613 | /* |
614 | * According to the SD specs, some commands require a delay after | |
615 | * issuing the command. | |
616 | */ | |
617 | if (idata->ic.postsleep_min_us) | |
618 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
619 | ||
a5f5774c | 620 | memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp)); |
cb87ea28 | 621 | |
a0d4c7eb | 622 | if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) { |
8d1e977d | 623 | /* |
a0d4c7eb | 624 | * Ensure RPMB/R1B command has completed by polling CMD13 |
8d1e977d LP |
625 | * "Send Status". |
626 | */ | |
a0d4c7eb | 627 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, NULL); |
8d1e977d LP |
628 | } |
629 | ||
a5f5774c JH |
630 | return err; |
631 | } | |
632 | ||
2fe20bae | 633 | static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md, |
97548575 LW |
634 | struct mmc_ioc_cmd __user *ic_ptr, |
635 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
636 | { |
637 | struct mmc_blk_ioc_data *idata; | |
3ecd8cf2 | 638 | struct mmc_blk_ioc_data *idatas[1]; |
614f0388 | 639 | struct mmc_queue *mq; |
a5f5774c | 640 | struct mmc_card *card; |
b093410c | 641 | int err = 0, ioc_err = 0; |
614f0388 | 642 | struct request *req; |
a5f5774c JH |
643 | |
644 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); | |
645 | if (IS_ERR(idata)) | |
646 | return PTR_ERR(idata); | |
97548575 LW |
647 | /* This will be NULL on non-RPMB ioctl():s */ |
648 | idata->rpmb = rpmb; | |
a5f5774c | 649 | |
a5f5774c JH |
650 | card = md->queue.card; |
651 | if (IS_ERR(card)) { | |
652 | err = PTR_ERR(card); | |
653 | goto cmd_done; | |
654 | } | |
655 | ||
614f0388 LW |
656 | /* |
657 | * Dispatch the ioctl() into the block request queue. | |
658 | */ | |
659 | mq = &md->queue; | |
660 | req = blk_get_request(mq->queue, | |
ff005a06 | 661 | idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
662 | if (IS_ERR(req)) { |
663 | err = PTR_ERR(req); | |
664 | goto cmd_done; | |
665 | } | |
3ecd8cf2 | 666 | idatas[0] = idata; |
97548575 LW |
667 | req_to_mmc_queue_req(req)->drv_op = |
668 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 669 | req_to_mmc_queue_req(req)->drv_op_data = idatas; |
3ecd8cf2 | 670 | req_to_mmc_queue_req(req)->ioc_count = 1; |
614f0388 | 671 | blk_execute_rq(mq->queue, NULL, req, 0); |
0493f6fe | 672 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
b093410c | 673 | err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata); |
614f0388 | 674 | blk_put_request(req); |
a5f5774c | 675 | |
cb87ea28 | 676 | cmd_done: |
cb87ea28 JC |
677 | kfree(idata->buf); |
678 | kfree(idata); | |
b093410c | 679 | return ioc_err ? ioc_err : err; |
cb87ea28 JC |
680 | } |
681 | ||
2fe20bae | 682 | static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md, |
97548575 LW |
683 | struct mmc_ioc_multi_cmd __user *user, |
684 | struct mmc_rpmb_data *rpmb) | |
a5f5774c JH |
685 | { |
686 | struct mmc_blk_ioc_data **idata = NULL; | |
687 | struct mmc_ioc_cmd __user *cmds = user->cmds; | |
688 | struct mmc_card *card; | |
3ecd8cf2 | 689 | struct mmc_queue *mq; |
b093410c | 690 | int i, err = 0, ioc_err = 0; |
a5f5774c | 691 | __u64 num_of_cmds; |
3ecd8cf2 | 692 | struct request *req; |
a5f5774c JH |
693 | |
694 | if (copy_from_user(&num_of_cmds, &user->num_of_cmds, | |
695 | sizeof(num_of_cmds))) | |
696 | return -EFAULT; | |
697 | ||
aab2ee03 GU |
698 | if (!num_of_cmds) |
699 | return 0; | |
700 | ||
a5f5774c JH |
701 | if (num_of_cmds > MMC_IOC_MAX_CMDS) |
702 | return -EINVAL; | |
703 | ||
704 | idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL); | |
705 | if (!idata) | |
706 | return -ENOMEM; | |
707 | ||
708 | for (i = 0; i < num_of_cmds; i++) { | |
709 | idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]); | |
710 | if (IS_ERR(idata[i])) { | |
711 | err = PTR_ERR(idata[i]); | |
712 | num_of_cmds = i; | |
713 | goto cmd_err; | |
714 | } | |
97548575 LW |
715 | /* This will be NULL on non-RPMB ioctl():s */ |
716 | idata[i]->rpmb = rpmb; | |
a5f5774c JH |
717 | } |
718 | ||
a5f5774c JH |
719 | card = md->queue.card; |
720 | if (IS_ERR(card)) { | |
721 | err = PTR_ERR(card); | |
2fe20bae | 722 | goto cmd_err; |
a5f5774c JH |
723 | } |
724 | ||
a5f5774c | 725 | |
3ecd8cf2 LW |
726 | /* |
727 | * Dispatch the ioctl()s into the block request queue. | |
728 | */ | |
729 | mq = &md->queue; | |
730 | req = blk_get_request(mq->queue, | |
ff005a06 | 731 | idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
fb8e456e AH |
732 | if (IS_ERR(req)) { |
733 | err = PTR_ERR(req); | |
734 | goto cmd_err; | |
735 | } | |
97548575 LW |
736 | req_to_mmc_queue_req(req)->drv_op = |
737 | rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; | |
69f7599e | 738 | req_to_mmc_queue_req(req)->drv_op_data = idata; |
3ecd8cf2 LW |
739 | req_to_mmc_queue_req(req)->ioc_count = num_of_cmds; |
740 | blk_execute_rq(mq->queue, NULL, req, 0); | |
0493f6fe | 741 | ioc_err = req_to_mmc_queue_req(req)->drv_op_result; |
a5f5774c JH |
742 | |
743 | /* copy to user if data and response */ | |
b093410c | 744 | for (i = 0; i < num_of_cmds && !err; i++) |
a5f5774c | 745 | err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]); |
a5f5774c | 746 | |
3ecd8cf2 LW |
747 | blk_put_request(req); |
748 | ||
a5f5774c JH |
749 | cmd_err: |
750 | for (i = 0; i < num_of_cmds; i++) { | |
751 | kfree(idata[i]->buf); | |
752 | kfree(idata[i]); | |
753 | } | |
754 | kfree(idata); | |
b093410c | 755 | return ioc_err ? ioc_err : err; |
a5f5774c JH |
756 | } |
757 | ||
61fe0e2b LW |
758 | static int mmc_blk_check_blkdev(struct block_device *bdev) |
759 | { | |
760 | /* | |
761 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
762 | * whole block device, not on a partition. This prevents overspray | |
763 | * between sibling partitions. | |
764 | */ | |
765 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
766 | return -EPERM; | |
767 | return 0; | |
768 | } | |
769 | ||
cb87ea28 JC |
770 | static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, |
771 | unsigned int cmd, unsigned long arg) | |
772 | { | |
2fe20bae | 773 | struct mmc_blk_data *md; |
61fe0e2b LW |
774 | int ret; |
775 | ||
a5f5774c JH |
776 | switch (cmd) { |
777 | case MMC_IOC_CMD: | |
61fe0e2b LW |
778 | ret = mmc_blk_check_blkdev(bdev); |
779 | if (ret) | |
780 | return ret; | |
2fe20bae LW |
781 | md = mmc_blk_get(bdev->bd_disk); |
782 | if (!md) | |
783 | return -EINVAL; | |
784 | ret = mmc_blk_ioctl_cmd(md, | |
97548575 LW |
785 | (struct mmc_ioc_cmd __user *)arg, |
786 | NULL); | |
2fe20bae LW |
787 | mmc_blk_put(md); |
788 | return ret; | |
a5f5774c | 789 | case MMC_IOC_MULTI_CMD: |
61fe0e2b LW |
790 | ret = mmc_blk_check_blkdev(bdev); |
791 | if (ret) | |
792 | return ret; | |
2fe20bae LW |
793 | md = mmc_blk_get(bdev->bd_disk); |
794 | if (!md) | |
795 | return -EINVAL; | |
796 | ret = mmc_blk_ioctl_multi_cmd(md, | |
97548575 LW |
797 | (struct mmc_ioc_multi_cmd __user *)arg, |
798 | NULL); | |
2fe20bae LW |
799 | mmc_blk_put(md); |
800 | return ret; | |
a5f5774c JH |
801 | default: |
802 | return -EINVAL; | |
803 | } | |
cb87ea28 JC |
804 | } |
805 | ||
806 | #ifdef CONFIG_COMPAT | |
807 | static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
808 | unsigned int cmd, unsigned long arg) | |
809 | { | |
810 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
811 | } | |
812 | #endif | |
813 | ||
83d5cde4 | 814 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
815 | .open = mmc_blk_open, |
816 | .release = mmc_blk_release, | |
a885c8c4 | 817 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 818 | .owner = THIS_MODULE, |
cb87ea28 JC |
819 | .ioctl = mmc_blk_ioctl, |
820 | #ifdef CONFIG_COMPAT | |
821 | .compat_ioctl = mmc_blk_compat_ioctl, | |
822 | #endif | |
1da177e4 LT |
823 | }; |
824 | ||
025e3d5f AH |
825 | static int mmc_blk_part_switch_pre(struct mmc_card *card, |
826 | unsigned int part_type) | |
827 | { | |
828 | int ret = 0; | |
829 | ||
830 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
831 | if (card->ext_csd.cmdq_en) { | |
832 | ret = mmc_cmdq_disable(card); | |
833 | if (ret) | |
834 | return ret; | |
835 | } | |
836 | mmc_retune_pause(card->host); | |
837 | } | |
838 | ||
839 | return ret; | |
840 | } | |
841 | ||
842 | static int mmc_blk_part_switch_post(struct mmc_card *card, | |
843 | unsigned int part_type) | |
844 | { | |
845 | int ret = 0; | |
846 | ||
847 | if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { | |
848 | mmc_retune_unpause(card->host); | |
849 | if (card->reenable_cmdq && !card->ext_csd.cmdq_en) | |
850 | ret = mmc_cmdq_enable(card); | |
851 | } | |
852 | ||
853 | return ret; | |
854 | } | |
855 | ||
371a689f | 856 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
1f797edc | 857 | unsigned int part_type) |
371a689f | 858 | { |
025e3d5f | 859 | int ret = 0; |
fc95e30b | 860 | struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); |
0d7d85ca | 861 | |
1f797edc | 862 | if (main_md->part_curr == part_type) |
371a689f AW |
863 | return 0; |
864 | ||
865 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
866 | u8 part_config = card->ext_csd.part_config; |
867 | ||
1f797edc | 868 | ret = mmc_blk_part_switch_pre(card, part_type); |
025e3d5f AH |
869 | if (ret) |
870 | return ret; | |
57da0c04 | 871 | |
0d7d85ca | 872 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
1f797edc | 873 | part_config |= part_type; |
371a689f AW |
874 | |
875 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 876 | EXT_CSD_PART_CONFIG, part_config, |
371a689f | 877 | card->ext_csd.part_time); |
57da0c04 | 878 | if (ret) { |
1f797edc | 879 | mmc_blk_part_switch_post(card, part_type); |
371a689f | 880 | return ret; |
57da0c04 | 881 | } |
0d7d85ca AH |
882 | |
883 | card->ext_csd.part_config = part_config; | |
57da0c04 | 884 | |
025e3d5f | 885 | ret = mmc_blk_part_switch_post(card, main_md->part_curr); |
67716327 | 886 | } |
371a689f | 887 | |
1f797edc | 888 | main_md->part_curr = part_type; |
025e3d5f | 889 | return ret; |
371a689f AW |
890 | } |
891 | ||
169f03a0 | 892 | static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) |
ec5a19dd PO |
893 | { |
894 | int err; | |
051913da BD |
895 | u32 result; |
896 | __be32 *blocks; | |
ec5a19dd | 897 | |
c7836d15 MY |
898 | struct mmc_request mrq = {}; |
899 | struct mmc_command cmd = {}; | |
900 | struct mmc_data data = {}; | |
ec5a19dd PO |
901 | |
902 | struct scatterlist sg; | |
903 | ||
ec5a19dd PO |
904 | cmd.opcode = MMC_APP_CMD; |
905 | cmd.arg = card->rca << 16; | |
7213d175 | 906 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
907 | |
908 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 | 909 | if (err) |
169f03a0 | 910 | return err; |
7213d175 | 911 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) |
169f03a0 | 912 | return -EIO; |
ec5a19dd PO |
913 | |
914 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
915 | ||
916 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
917 | cmd.arg = 0; | |
7213d175 | 918 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 919 | |
ec5a19dd PO |
920 | data.blksz = 4; |
921 | data.blocks = 1; | |
922 | data.flags = MMC_DATA_READ; | |
923 | data.sg = &sg; | |
924 | data.sg_len = 1; | |
d380443c | 925 | mmc_set_data_timeout(&data, card); |
ec5a19dd | 926 | |
ec5a19dd PO |
927 | mrq.cmd = &cmd; |
928 | mrq.data = &data; | |
929 | ||
051913da BD |
930 | blocks = kmalloc(4, GFP_KERNEL); |
931 | if (!blocks) | |
169f03a0 | 932 | return -ENOMEM; |
051913da BD |
933 | |
934 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
935 | |
936 | mmc_wait_for_req(card->host, &mrq); | |
937 | ||
051913da BD |
938 | result = ntohl(*blocks); |
939 | kfree(blocks); | |
940 | ||
17b0429d | 941 | if (cmd.error || data.error) |
169f03a0 LW |
942 | return -EIO; |
943 | ||
944 | *written_blocks = result; | |
ec5a19dd | 945 | |
169f03a0 | 946 | return 0; |
ec5a19dd PO |
947 | } |
948 | ||
92c0a0cc AH |
949 | static unsigned int mmc_blk_clock_khz(struct mmc_host *host) |
950 | { | |
951 | if (host->actual_clock) | |
952 | return host->actual_clock / 1000; | |
953 | ||
954 | /* Clock may be subject to a divisor, fudge it by a factor of 2. */ | |
955 | if (host->ios.clock) | |
956 | return host->ios.clock / 2000; | |
957 | ||
958 | /* How can there be no clock */ | |
959 | WARN_ON_ONCE(1); | |
960 | return 100; /* 100 kHz is minimum possible value */ | |
961 | } | |
962 | ||
963 | static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host, | |
964 | struct mmc_data *data) | |
965 | { | |
966 | unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); | |
967 | unsigned int khz; | |
968 | ||
969 | if (data->timeout_clks) { | |
970 | khz = mmc_blk_clock_khz(host); | |
971 | ms += DIV_ROUND_UP(data->timeout_clks, khz); | |
972 | } | |
973 | ||
974 | return ms; | |
975 | } | |
976 | ||
67716327 AH |
977 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
978 | int type) | |
979 | { | |
980 | int err; | |
981 | ||
982 | if (md->reset_done & type) | |
983 | return -EEXIST; | |
984 | ||
985 | md->reset_done |= type; | |
986 | err = mmc_hw_reset(host); | |
987 | /* Ensure we switch back to the correct partition */ | |
988 | if (err != -EOPNOTSUPP) { | |
fc95e30b UH |
989 | struct mmc_blk_data *main_md = |
990 | dev_get_drvdata(&host->card->dev); | |
67716327 AH |
991 | int part_err; |
992 | ||
993 | main_md->part_curr = main_md->part_type; | |
1f797edc | 994 | part_err = mmc_blk_part_switch(host->card, md->part_type); |
67716327 AH |
995 | if (part_err) { |
996 | /* | |
997 | * We have failed to get back into the correct | |
998 | * partition, so we need to abort the whole request. | |
999 | */ | |
1000 | return -ENODEV; | |
1001 | } | |
1002 | } | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
1007 | { | |
1008 | md->reset_done &= ~type; | |
1009 | } | |
1010 | ||
5ec12396 LW |
1011 | /* |
1012 | * The non-block commands come back from the block layer after it queued it and | |
1013 | * processed it with all other requests and then they get issued in this | |
1014 | * function. | |
1015 | */ | |
1016 | static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) | |
1017 | { | |
1018 | struct mmc_queue_req *mq_rq; | |
1019 | struct mmc_card *card = mq->card; | |
1020 | struct mmc_blk_data *md = mq->blkdata; | |
69f7599e | 1021 | struct mmc_blk_ioc_data **idata; |
97548575 | 1022 | bool rpmb_ioctl; |
627c3ccf LW |
1023 | u8 **ext_csd; |
1024 | u32 status; | |
0493f6fe | 1025 | int ret; |
5ec12396 LW |
1026 | int i; |
1027 | ||
1028 | mq_rq = req_to_mmc_queue_req(req); | |
97548575 | 1029 | rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB); |
5ec12396 LW |
1030 | |
1031 | switch (mq_rq->drv_op) { | |
1032 | case MMC_DRV_OP_IOCTL: | |
97548575 | 1033 | case MMC_DRV_OP_IOCTL_RPMB: |
69f7599e | 1034 | idata = mq_rq->drv_op_data; |
7432b49b | 1035 | for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) { |
69f7599e | 1036 | ret = __mmc_blk_ioctl_cmd(card, md, idata[i]); |
0493f6fe | 1037 | if (ret) |
5ec12396 LW |
1038 | break; |
1039 | } | |
5ec12396 | 1040 | /* Always switch back to main area after RPMB access */ |
97548575 LW |
1041 | if (rpmb_ioctl) |
1042 | mmc_blk_part_switch(card, 0); | |
0493f6fe LW |
1043 | break; |
1044 | case MMC_DRV_OP_BOOT_WP: | |
1045 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, | |
1046 | card->ext_csd.boot_ro_lock | | |
1047 | EXT_CSD_BOOT_WP_B_PWR_WP_EN, | |
1048 | card->ext_csd.part_time); | |
1049 | if (ret) | |
1050 | pr_err("%s: Locking boot partition ro until next power on failed: %d\n", | |
1051 | md->disk->disk_name, ret); | |
1052 | else | |
1053 | card->ext_csd.boot_ro_lock |= | |
1054 | EXT_CSD_BOOT_WP_B_PWR_WP_EN; | |
5ec12396 | 1055 | break; |
627c3ccf LW |
1056 | case MMC_DRV_OP_GET_CARD_STATUS: |
1057 | ret = mmc_send_status(card, &status); | |
1058 | if (!ret) | |
1059 | ret = status; | |
1060 | break; | |
1061 | case MMC_DRV_OP_GET_EXT_CSD: | |
1062 | ext_csd = mq_rq->drv_op_data; | |
1063 | ret = mmc_get_ext_csd(card, ext_csd); | |
1064 | break; | |
5ec12396 | 1065 | default: |
0493f6fe LW |
1066 | pr_err("%s: unknown driver specific operation\n", |
1067 | md->disk->disk_name); | |
1068 | ret = -EINVAL; | |
5ec12396 LW |
1069 | break; |
1070 | } | |
0493f6fe | 1071 | mq_rq->drv_op_result = ret; |
0fbfd125 | 1072 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
5ec12396 LW |
1073 | } |
1074 | ||
df061588 | 1075 | static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
bd788c96 | 1076 | { |
7db3028e | 1077 | struct mmc_blk_data *md = mq->blkdata; |
bd788c96 | 1078 | struct mmc_card *card = md->queue.card; |
01904ff7 | 1079 | unsigned int from, nr; |
67716327 | 1080 | int err = 0, type = MMC_BLK_DISCARD; |
2a842aca | 1081 | blk_status_t status = BLK_STS_OK; |
bd788c96 | 1082 | |
bd788c96 | 1083 | if (!mmc_can_erase(card)) { |
2a842aca | 1084 | status = BLK_STS_NOTSUPP; |
8cb6ed17 | 1085 | goto fail; |
bd788c96 AH |
1086 | } |
1087 | ||
1088 | from = blk_rq_pos(req); | |
1089 | nr = blk_rq_sectors(req); | |
1090 | ||
164b50b3 GU |
1091 | do { |
1092 | err = 0; | |
1093 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
1094 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1095 | INAND_CMD38_ARG_EXT_CSD, | |
01904ff7 | 1096 | card->erase_arg == MMC_TRIM_ARG ? |
164b50b3 GU |
1097 | INAND_CMD38_ARG_TRIM : |
1098 | INAND_CMD38_ARG_ERASE, | |
ad91619a | 1099 | card->ext_csd.generic_cmd6_time); |
164b50b3 GU |
1100 | } |
1101 | if (!err) | |
01904ff7 | 1102 | err = mmc_erase(card, from, nr, card->erase_arg); |
164b50b3 | 1103 | } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); |
2a842aca CH |
1104 | if (err) |
1105 | status = BLK_STS_IOERR; | |
1106 | else | |
67716327 | 1107 | mmc_blk_reset_success(md, type); |
8cb6ed17 | 1108 | fail: |
0fbfd125 | 1109 | blk_mq_end_request(req, status); |
bd788c96 AH |
1110 | } |
1111 | ||
df061588 | 1112 | static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
49804548 AH |
1113 | struct request *req) |
1114 | { | |
7db3028e | 1115 | struct mmc_blk_data *md = mq->blkdata; |
49804548 | 1116 | struct mmc_card *card = md->queue.card; |
775a9362 | 1117 | unsigned int from, nr, arg; |
67716327 | 1118 | int err = 0, type = MMC_BLK_SECDISCARD; |
2a842aca | 1119 | blk_status_t status = BLK_STS_OK; |
49804548 | 1120 | |
775a9362 | 1121 | if (!(mmc_can_secure_erase_trim(card))) { |
2a842aca | 1122 | status = BLK_STS_NOTSUPP; |
49804548 AH |
1123 | goto out; |
1124 | } | |
1125 | ||
28302812 AH |
1126 | from = blk_rq_pos(req); |
1127 | nr = blk_rq_sectors(req); | |
1128 | ||
775a9362 ME |
1129 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) |
1130 | arg = MMC_SECURE_TRIM1_ARG; | |
1131 | else | |
1132 | arg = MMC_SECURE_ERASE_ARG; | |
d9ddd629 | 1133 | |
67716327 | 1134 | retry: |
6a7a6b45 AW |
1135 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1136 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1137 | INAND_CMD38_ARG_EXT_CSD, | |
1138 | arg == MMC_SECURE_TRIM1_ARG ? | |
1139 | INAND_CMD38_ARG_SECTRIM1 : | |
1140 | INAND_CMD38_ARG_SECERASE, | |
ad91619a | 1141 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1142 | if (err) |
28302812 | 1143 | goto out_retry; |
6a7a6b45 | 1144 | } |
28302812 | 1145 | |
49804548 | 1146 | err = mmc_erase(card, from, nr, arg); |
28302812 AH |
1147 | if (err == -EIO) |
1148 | goto out_retry; | |
2a842aca CH |
1149 | if (err) { |
1150 | status = BLK_STS_IOERR; | |
28302812 | 1151 | goto out; |
2a842aca | 1152 | } |
28302812 AH |
1153 | |
1154 | if (arg == MMC_SECURE_TRIM1_ARG) { | |
6a7a6b45 AW |
1155 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
1156 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
1157 | INAND_CMD38_ARG_EXT_CSD, | |
1158 | INAND_CMD38_ARG_SECTRIM2, | |
ad91619a | 1159 | card->ext_csd.generic_cmd6_time); |
6a7a6b45 | 1160 | if (err) |
28302812 | 1161 | goto out_retry; |
6a7a6b45 | 1162 | } |
28302812 | 1163 | |
49804548 | 1164 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
28302812 AH |
1165 | if (err == -EIO) |
1166 | goto out_retry; | |
2a842aca CH |
1167 | if (err) { |
1168 | status = BLK_STS_IOERR; | |
28302812 | 1169 | goto out; |
2a842aca | 1170 | } |
6a7a6b45 | 1171 | } |
28302812 | 1172 | |
28302812 AH |
1173 | out_retry: |
1174 | if (err && !mmc_blk_reset(md, card->host, type)) | |
67716327 AH |
1175 | goto retry; |
1176 | if (!err) | |
1177 | mmc_blk_reset_success(md, type); | |
28302812 | 1178 | out: |
0fbfd125 | 1179 | blk_mq_end_request(req, status); |
49804548 AH |
1180 | } |
1181 | ||
df061588 | 1182 | static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
f4c5522b | 1183 | { |
7db3028e | 1184 | struct mmc_blk_data *md = mq->blkdata; |
881d1c25 SJ |
1185 | struct mmc_card *card = md->queue.card; |
1186 | int ret = 0; | |
1187 | ||
1188 | ret = mmc_flush_cache(card); | |
0fbfd125 | 1189 | blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); |
f4c5522b AW |
1190 | } |
1191 | ||
1192 | /* | |
1193 | * Reformat current write as a reliable write, supporting | |
1194 | * both legacy and the enhanced reliable write MMC cards. | |
1195 | * In each transfer we'll handle only as much as a single | |
1196 | * reliable write can handle, thus finish the request in | |
1197 | * partial completions. | |
1198 | */ | |
d0c97cfb AW |
1199 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
1200 | struct mmc_card *card, | |
1201 | struct request *req) | |
f4c5522b | 1202 | { |
f4c5522b AW |
1203 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
1204 | /* Legacy mode imposes restrictions on transfers. */ | |
9cb38f7a | 1205 | if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors)) |
f4c5522b AW |
1206 | brq->data.blocks = 1; |
1207 | ||
1208 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
1209 | brq->data.blocks = card->ext_csd.rel_sectors; | |
1210 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
1211 | brq->data.blocks = 1; | |
1212 | } | |
f4c5522b AW |
1213 | } |
1214 | ||
f47a1fe3 AH |
1215 | #define CMD_ERRORS_EXCL_OOR \ |
1216 | (R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
4c2b8f26 RKAL |
1217 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ |
1218 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
a04e6bae | 1219 | R1_CARD_ECC_FAILED | /* Card ECC failed */ \ |
4c2b8f26 RKAL |
1220 | R1_CC_ERROR | /* Card controller error */ \ |
1221 | R1_ERROR) /* General/unknown error */ | |
1222 | ||
f47a1fe3 AH |
1223 | #define CMD_ERRORS \ |
1224 | (CMD_ERRORS_EXCL_OOR | \ | |
1225 | R1_OUT_OF_RANGE) /* Command argument out of range */ \ | |
1226 | ||
d83c2dba | 1227 | static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) |
a04e6bae | 1228 | { |
d83c2dba | 1229 | u32 val; |
a04e6bae | 1230 | |
d83c2dba SL |
1231 | /* |
1232 | * Per the SD specification(physical layer version 4.10)[1], | |
1233 | * section 4.3.3, it explicitly states that "When the last | |
1234 | * block of user area is read using CMD18, the host should | |
1235 | * ignore OUT_OF_RANGE error that may occur even the sequence | |
1236 | * is correct". And JESD84-B51 for eMMC also has a similar | |
1237 | * statement on section 6.8.3. | |
1238 | * | |
1239 | * Multiple block read/write could be done by either predefined | |
1240 | * method, namely CMD23, or open-ending mode. For open-ending mode, | |
1241 | * we should ignore the OUT_OF_RANGE error as it's normal behaviour. | |
1242 | * | |
1243 | * However the spec[1] doesn't tell us whether we should also | |
1244 | * ignore that for predefined method. But per the spec[1], section | |
1245 | * 4.15 Set Block Count Command, it says"If illegal block count | |
1246 | * is set, out of range error will be indicated during read/write | |
1247 | * operation (For example, data transfer is stopped at user area | |
1248 | * boundary)." In another word, we could expect a out of range error | |
1249 | * in the response for the following CMD18/25. And if argument of | |
1250 | * CMD23 + the argument of CMD18/25 exceed the max number of blocks, | |
1251 | * we could also expect to get a -ETIMEDOUT or any error number from | |
1252 | * the host drivers due to missing data response(for write)/data(for | |
1253 | * read), as the cards will stop the data transfer by itself per the | |
1254 | * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode. | |
1255 | */ | |
1256 | ||
1257 | if (!brq->stop.error) { | |
1258 | bool oor_with_open_end; | |
1259 | /* If there is no error yet, check R1 response */ | |
1260 | ||
1261 | val = brq->stop.resp[0] & CMD_ERRORS; | |
1262 | oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc; | |
1263 | ||
1264 | if (val && !oor_with_open_end) | |
1265 | brq->stop.error = -EIO; | |
1266 | } | |
a04e6bae WS |
1267 | } |
1268 | ||
ca5717f7 | 1269 | static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, |
d3377c01 AH |
1270 | int disable_multi, bool *do_rel_wr_p, |
1271 | bool *do_data_tag_p) | |
1da177e4 | 1272 | { |
ca5717f7 AH |
1273 | struct mmc_blk_data *md = mq->blkdata; |
1274 | struct mmc_card *card = md->queue.card; | |
54d49d77 | 1275 | struct mmc_blk_request *brq = &mqrq->brq; |
67e69d52 | 1276 | struct request *req = mmc_queue_req_to_req(mqrq); |
d3377c01 | 1277 | bool do_rel_wr, do_data_tag; |
1da177e4 | 1278 | |
f4c5522b AW |
1279 | /* |
1280 | * Reliable writes are used to implement Forced Unit Access and | |
d3df0465 | 1281 | * are supported only on MMCs. |
f4c5522b | 1282 | */ |
d3377c01 AH |
1283 | do_rel_wr = (req->cmd_flags & REQ_FUA) && |
1284 | rq_data_dir(req) == WRITE && | |
1285 | (md->flags & MMC_BLK_REL_WR); | |
f4c5522b | 1286 | |
54d49d77 | 1287 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
ca5717f7 | 1288 | |
54d49d77 | 1289 | brq->mrq.data = &brq->data; |
93482b3d | 1290 | brq->mrq.tag = req->tag; |
1da177e4 | 1291 | |
54d49d77 PF |
1292 | brq->stop.opcode = MMC_STOP_TRANSMISSION; |
1293 | brq->stop.arg = 0; | |
ca5717f7 AH |
1294 | |
1295 | if (rq_data_dir(req) == READ) { | |
1296 | brq->data.flags = MMC_DATA_READ; | |
1297 | brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1298 | } else { | |
1299 | brq->data.flags = MMC_DATA_WRITE; | |
1300 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1301 | } | |
1302 | ||
1303 | brq->data.blksz = 512; | |
54d49d77 | 1304 | brq->data.blocks = blk_rq_sectors(req); |
93482b3d AH |
1305 | brq->data.blk_addr = blk_rq_pos(req); |
1306 | ||
1307 | /* | |
1308 | * The command queue supports 2 priorities: "high" (1) and "simple" (0). | |
1309 | * The eMMC will give "high" priority tasks priority over "simple" | |
1310 | * priority tasks. Here we always set "simple" priority by not setting | |
1311 | * MMC_DATA_PRIO. | |
1312 | */ | |
6a79e391 | 1313 | |
54d49d77 PF |
1314 | /* |
1315 | * The block layer doesn't support all sector count | |
1316 | * restrictions, so we need to be prepared for too big | |
1317 | * requests. | |
1318 | */ | |
1319 | if (brq->data.blocks > card->host->max_blk_count) | |
1320 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1321 | |
2bf22b39 | 1322 | if (brq->data.blocks > 1) { |
41591b38 CB |
1323 | /* |
1324 | * Some SD cards in SPI mode return a CRC error or even lock up | |
1325 | * completely when trying to read the last block using a | |
1326 | * multiblock read command. | |
1327 | */ | |
1328 | if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) && | |
1329 | (blk_rq_pos(req) + blk_rq_sectors(req) == | |
1330 | get_capacity(md->disk))) | |
1331 | brq->data.blocks--; | |
1332 | ||
2bf22b39 PW |
1333 | /* |
1334 | * After a read error, we redo the request one sector | |
1335 | * at a time in order to accurately determine which | |
1336 | * sectors can be read successfully. | |
1337 | */ | |
1338 | if (disable_multi) | |
1339 | brq->data.blocks = 1; | |
1340 | ||
2e47e842 KM |
1341 | /* |
1342 | * Some controllers have HW issues while operating | |
1343 | * in multiple I/O mode | |
1344 | */ | |
1345 | if (card->host->ops->multi_io_quirk) | |
1346 | brq->data.blocks = card->host->ops->multi_io_quirk(card, | |
1347 | (rq_data_dir(req) == READ) ? | |
1348 | MMC_DATA_READ : MMC_DATA_WRITE, | |
1349 | brq->data.blocks); | |
2bf22b39 | 1350 | } |
d0c97cfb | 1351 | |
93482b3d | 1352 | if (do_rel_wr) { |
ca5717f7 | 1353 | mmc_apply_rel_rw(brq, card, req); |
93482b3d AH |
1354 | brq->data.flags |= MMC_DATA_REL_WR; |
1355 | } | |
ca5717f7 AH |
1356 | |
1357 | /* | |
1358 | * Data tag is used only during writing meta data to speed | |
1359 | * up write and any subsequent read of this meta data | |
1360 | */ | |
d3377c01 AH |
1361 | do_data_tag = card->ext_csd.data_tag_unit_size && |
1362 | (req->cmd_flags & REQ_META) && | |
1363 | (rq_data_dir(req) == WRITE) && | |
1364 | ((brq->data.blocks * brq->data.blksz) >= | |
1365 | card->ext_csd.data_tag_unit_size); | |
ca5717f7 | 1366 | |
93482b3d AH |
1367 | if (do_data_tag) |
1368 | brq->data.flags |= MMC_DATA_DAT_TAG; | |
1369 | ||
ca5717f7 AH |
1370 | mmc_set_data_timeout(&brq->data, card); |
1371 | ||
1372 | brq->data.sg = mqrq->sg; | |
1373 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1374 | ||
1375 | /* | |
1376 | * Adjust the sg list so it is the same size as the | |
1377 | * request. | |
1378 | */ | |
1379 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1380 | int i, data_size = brq->data.blocks << 9; | |
1381 | struct scatterlist *sg; | |
1382 | ||
1383 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1384 | data_size -= sg->length; | |
1385 | if (data_size <= 0) { | |
1386 | sg->length += data_size; | |
1387 | i++; | |
1388 | break; | |
1389 | } | |
1390 | } | |
1391 | brq->data.sg_len = i; | |
1392 | } | |
1393 | ||
d3377c01 AH |
1394 | if (do_rel_wr_p) |
1395 | *do_rel_wr_p = do_rel_wr; | |
1396 | ||
1397 | if (do_data_tag_p) | |
1398 | *do_data_tag_p = do_data_tag; | |
ca5717f7 AH |
1399 | } |
1400 | ||
1e8e55b6 AH |
1401 | #define MMC_CQE_RETRIES 2 |
1402 | ||
1403 | static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) | |
1404 | { | |
1405 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1406 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1407 | struct request_queue *q = req->q; | |
1408 | struct mmc_host *host = mq->card->host; | |
1409 | unsigned long flags; | |
1410 | bool put_card; | |
1411 | int err; | |
1412 | ||
1413 | mmc_cqe_post_req(host, mrq); | |
1414 | ||
1415 | if (mrq->cmd && mrq->cmd->error) | |
1416 | err = mrq->cmd->error; | |
1417 | else if (mrq->data && mrq->data->error) | |
1418 | err = mrq->data->error; | |
1419 | else | |
1420 | err = 0; | |
1421 | ||
1422 | if (err) { | |
1423 | if (mqrq->retries++ < MMC_CQE_RETRIES) | |
1424 | blk_mq_requeue_request(req, true); | |
1425 | else | |
1426 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1427 | } else if (mrq->data) { | |
1428 | if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered)) | |
1429 | blk_mq_requeue_request(req, true); | |
1430 | else | |
1431 | __blk_mq_end_request(req, BLK_STS_OK); | |
1432 | } else { | |
1433 | blk_mq_end_request(req, BLK_STS_OK); | |
1434 | } | |
1435 | ||
f5d72c5c | 1436 | spin_lock_irqsave(&mq->lock, flags); |
1e8e55b6 AH |
1437 | |
1438 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
1439 | ||
1440 | put_card = (mmc_tot_in_flight(mq) == 0); | |
1441 | ||
1442 | mmc_cqe_check_busy(mq); | |
1443 | ||
f5d72c5c | 1444 | spin_unlock_irqrestore(&mq->lock, flags); |
1e8e55b6 AH |
1445 | |
1446 | if (!mq->cqe_busy) | |
1447 | blk_mq_run_hw_queues(q, true); | |
1448 | ||
1449 | if (put_card) | |
1450 | mmc_put_card(mq->card, &mq->ctx); | |
1451 | } | |
1452 | ||
1453 | void mmc_blk_cqe_recovery(struct mmc_queue *mq) | |
1454 | { | |
1455 | struct mmc_card *card = mq->card; | |
1456 | struct mmc_host *host = card->host; | |
1457 | int err; | |
1458 | ||
1459 | pr_debug("%s: CQE recovery start\n", mmc_hostname(host)); | |
1460 | ||
1461 | err = mmc_cqe_recovery(host); | |
1462 | if (err) | |
1463 | mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY); | |
1464 | else | |
1465 | mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY); | |
1466 | ||
1467 | pr_debug("%s: CQE recovery done\n", mmc_hostname(host)); | |
1468 | } | |
1469 | ||
1470 | static void mmc_blk_cqe_req_done(struct mmc_request *mrq) | |
1471 | { | |
1472 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
1473 | brq.mrq); | |
1474 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1475 | struct request_queue *q = req->q; | |
1476 | struct mmc_queue *mq = q->queuedata; | |
1477 | ||
1478 | /* | |
1479 | * Block layer timeouts race with completions which means the normal | |
1480 | * completion path cannot be used during recovery. | |
1481 | */ | |
1482 | if (mq->in_recovery) | |
1483 | mmc_blk_cqe_complete_rq(mq, req); | |
1484 | else | |
1485 | blk_mq_complete_request(req); | |
1486 | } | |
1487 | ||
1488 | static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
1489 | { | |
1490 | mrq->done = mmc_blk_cqe_req_done; | |
1491 | mrq->recovery_notifier = mmc_cqe_recovery_notifier; | |
1492 | ||
1493 | return mmc_cqe_start_req(host, mrq); | |
1494 | } | |
1495 | ||
1496 | static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq, | |
1497 | struct request *req) | |
1498 | { | |
1499 | struct mmc_blk_request *brq = &mqrq->brq; | |
1500 | ||
1501 | memset(brq, 0, sizeof(*brq)); | |
1502 | ||
1503 | brq->mrq.cmd = &brq->cmd; | |
1504 | brq->mrq.tag = req->tag; | |
1505 | ||
1506 | return &brq->mrq; | |
1507 | } | |
1508 | ||
1509 | static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req) | |
1510 | { | |
1511 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1512 | struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req); | |
1513 | ||
1514 | mrq->cmd->opcode = MMC_SWITCH; | |
1515 | mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1516 | (EXT_CSD_FLUSH_CACHE << 16) | | |
1517 | (1 << 8) | | |
1518 | EXT_CSD_CMD_SET_NORMAL; | |
1519 | mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B; | |
1520 | ||
1521 | return mmc_blk_cqe_start_req(mq->card->host, mrq); | |
1522 | } | |
1523 | ||
511ce378 BW |
1524 | static int mmc_blk_hsq_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1525 | { | |
1526 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1527 | struct mmc_host *host = mq->card->host; | |
1528 | int err; | |
1529 | ||
1530 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
1531 | mqrq->brq.mrq.done = mmc_blk_hsq_req_done; | |
1532 | mmc_pre_req(host, &mqrq->brq.mrq); | |
1533 | ||
1534 | err = mmc_cqe_start_req(host, &mqrq->brq.mrq); | |
1535 | if (err) | |
1536 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
1537 | ||
1538 | return err; | |
1539 | } | |
1540 | ||
1e8e55b6 AH |
1541 | static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1542 | { | |
1543 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
511ce378 BW |
1544 | struct mmc_host *host = mq->card->host; |
1545 | ||
1546 | if (host->hsq_enabled) | |
1547 | return mmc_blk_hsq_issue_rw_rq(mq, req); | |
1e8e55b6 AH |
1548 | |
1549 | mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL); | |
1550 | ||
1551 | return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq); | |
1552 | } | |
1553 | ||
ca5717f7 AH |
1554 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
1555 | struct mmc_card *card, | |
1556 | int disable_multi, | |
1557 | struct mmc_queue *mq) | |
1558 | { | |
1559 | u32 readcmd, writecmd; | |
1560 | struct mmc_blk_request *brq = &mqrq->brq; | |
67e69d52 | 1561 | struct request *req = mmc_queue_req_to_req(mqrq); |
ca5717f7 AH |
1562 | struct mmc_blk_data *md = mq->blkdata; |
1563 | bool do_rel_wr, do_data_tag; | |
1564 | ||
1565 | mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag); | |
1566 | ||
1567 | brq->mrq.cmd = &brq->cmd; | |
1568 | ||
1569 | brq->cmd.arg = blk_rq_pos(req); | |
1570 | if (!mmc_card_blockaddr(card)) | |
1571 | brq->cmd.arg <<= 9; | |
1572 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1573 | ||
54d49d77 PF |
1574 | if (brq->data.blocks > 1 || do_rel_wr) { |
1575 | /* SPI multiblock writes terminate using a special | |
1576 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1577 | */ |
54d49d77 PF |
1578 | if (!mmc_host_is_spi(card->host) || |
1579 | rq_data_dir(req) == READ) | |
1580 | brq->mrq.stop = &brq->stop; | |
1581 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1582 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1583 | } else { | |
1584 | brq->mrq.stop = NULL; | |
1585 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1586 | writecmd = MMC_WRITE_BLOCK; | |
1587 | } | |
ca5717f7 | 1588 | brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd; |
4265900e | 1589 | |
54d49d77 PF |
1590 | /* |
1591 | * Pre-defined multi-block transfers are preferable to | |
1592 | * open ended-ones (and necessary for reliable writes). | |
1593 | * However, it is not sufficient to just send CMD23, | |
1594 | * and avoid the final CMD12, as on an error condition | |
1595 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1596 | * with Auto-CMD23 enhancements provided by some | |
1597 | * hosts, means that the complexity of dealing | |
1598 | * with this is best left to the host. If CMD23 is | |
1599 | * supported by card and host, we'll fill sbc in and let | |
1600 | * the host deal with handling it correctly. This means | |
1601 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1602 | * change of behavior will be observed. | |
1603 | * | |
1604 | * N.B: Some MMC cards experience perf degradation. | |
1605 | * We'll avoid using CMD23-bounded multiblock writes for | |
1606 | * these, while retaining features like reliable writes. | |
1607 | */ | |
4265900e SD |
1608 | if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && |
1609 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || | |
1610 | do_data_tag)) { | |
54d49d77 PF |
1611 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; |
1612 | brq->sbc.arg = brq->data.blocks | | |
4265900e SD |
1613 | (do_rel_wr ? (1 << 31) : 0) | |
1614 | (do_data_tag ? (1 << 29) : 0); | |
54d49d77 PF |
1615 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; |
1616 | brq->mrq.sbc = &brq->sbc; | |
1617 | } | |
54d49d77 | 1618 | } |
6a79e391 | 1619 | |
81196976 | 1620 | #define MMC_MAX_RETRIES 5 |
7eb43d53 | 1621 | #define MMC_DATA_RETRIES 2 |
81196976 AH |
1622 | #define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1) |
1623 | ||
7eb43d53 AH |
1624 | static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout) |
1625 | { | |
1626 | struct mmc_command cmd = { | |
1627 | .opcode = MMC_STOP_TRANSMISSION, | |
1628 | .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC, | |
1629 | /* Some hosts wait for busy anyway, so provide a busy timeout */ | |
1630 | .busy_timeout = timeout, | |
1631 | }; | |
1632 | ||
1633 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
1634 | } | |
1635 | ||
1636 | static int mmc_blk_fix_state(struct mmc_card *card, struct request *req) | |
1637 | { | |
1638 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1639 | struct mmc_blk_request *brq = &mqrq->brq; | |
1640 | unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data); | |
1641 | int err; | |
1642 | ||
1643 | mmc_retune_hold_now(card->host); | |
1644 | ||
1645 | mmc_blk_send_stop(card, timeout); | |
1646 | ||
3869468e | 1647 | err = card_busy_detect(card, timeout, NULL); |
7eb43d53 AH |
1648 | |
1649 | mmc_retune_release(card->host); | |
1650 | ||
1651 | return err; | |
1652 | } | |
1653 | ||
81196976 AH |
1654 | #define MMC_READ_SINGLE_RETRIES 2 |
1655 | ||
1656 | /* Single sector read during recovery */ | |
1657 | static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) | |
1658 | { | |
1659 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1660 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
1661 | struct mmc_card *card = mq->card; | |
1662 | struct mmc_host *host = card->host; | |
1663 | blk_status_t error = BLK_STS_OK; | |
1664 | int retries = 0; | |
1665 | ||
1666 | do { | |
1667 | u32 status; | |
1668 | int err; | |
1669 | ||
1670 | mmc_blk_rw_rq_prep(mqrq, card, 1, mq); | |
1671 | ||
1672 | mmc_wait_for_req(host, mrq); | |
1673 | ||
1674 | err = mmc_send_status(card, &status); | |
1675 | if (err) | |
1676 | goto error_exit; | |
1677 | ||
1678 | if (!mmc_host_is_spi(host) && | |
40c96853 | 1679 | !mmc_ready_for_data(status)) { |
7eb43d53 | 1680 | err = mmc_blk_fix_state(card, req); |
81196976 AH |
1681 | if (err) |
1682 | goto error_exit; | |
1683 | } | |
1684 | ||
1685 | if (mrq->cmd->error && retries++ < MMC_READ_SINGLE_RETRIES) | |
1686 | continue; | |
1687 | ||
1688 | retries = 0; | |
1689 | ||
1690 | if (mrq->cmd->error || | |
1691 | mrq->data->error || | |
1692 | (!mmc_host_is_spi(host) && | |
1693 | (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS))) | |
1694 | error = BLK_STS_IOERR; | |
1695 | else | |
1696 | error = BLK_STS_OK; | |
1697 | ||
1698 | } while (blk_update_request(req, error, 512)); | |
1699 | ||
1700 | return; | |
1701 | ||
1702 | error_exit: | |
1703 | mrq->data->bytes_xfered = 0; | |
1704 | blk_update_request(req, BLK_STS_IOERR, 512); | |
1705 | /* Let it try the remaining request again */ | |
1706 | if (mqrq->retries > MMC_MAX_RETRIES - 1) | |
1707 | mqrq->retries = MMC_MAX_RETRIES - 1; | |
1708 | } | |
1709 | ||
7eb43d53 AH |
1710 | static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) |
1711 | { | |
1712 | return !!brq->mrq.sbc; | |
1713 | } | |
1714 | ||
1715 | static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) | |
1716 | { | |
1717 | return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; | |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * Check for errors the host controller driver might not have seen such as | |
1722 | * response mode errors or invalid card state. | |
1723 | */ | |
1724 | static bool mmc_blk_status_error(struct request *req, u32 status) | |
1725 | { | |
1726 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1727 | struct mmc_blk_request *brq = &mqrq->brq; | |
1728 | struct mmc_queue *mq = req->q->queuedata; | |
1729 | u32 stop_err_bits; | |
1730 | ||
1731 | if (mmc_host_is_spi(mq->card->host)) | |
aa950144 | 1732 | return false; |
7eb43d53 AH |
1733 | |
1734 | stop_err_bits = mmc_blk_stop_err_bits(brq); | |
1735 | ||
1736 | return brq->cmd.resp[0] & CMD_ERRORS || | |
1737 | brq->stop.resp[0] & stop_err_bits || | |
1738 | status & stop_err_bits || | |
40c96853 | 1739 | (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status)); |
7eb43d53 AH |
1740 | } |
1741 | ||
1742 | static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq) | |
1743 | { | |
1744 | return !brq->sbc.error && !brq->cmd.error && | |
1745 | !(brq->cmd.resp[0] & CMD_ERRORS); | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * Requests are completed by mmc_blk_mq_complete_rq() which sets simple | |
1750 | * policy: | |
1751 | * 1. A request that has transferred at least some data is considered | |
1752 | * successful and will be requeued if there is remaining data to | |
1753 | * transfer. | |
1754 | * 2. Otherwise the number of retries is incremented and the request | |
1755 | * will be requeued if there are remaining retries. | |
1756 | * 3. Otherwise the request will be errored out. | |
1757 | * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and | |
1758 | * mqrq->retries. So there are only 4 possible actions here: | |
1759 | * 1. do not accept the bytes_xfered value i.e. set it to zero | |
1760 | * 2. change mqrq->retries to determine the number of retries | |
1761 | * 3. try to reset the card | |
1762 | * 4. read one sector at a time | |
1763 | */ | |
81196976 AH |
1764 | static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) |
1765 | { | |
1766 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1767 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1768 | struct mmc_blk_request *brq = &mqrq->brq; | |
1769 | struct mmc_blk_data *md = mq->blkdata; | |
1770 | struct mmc_card *card = mq->card; | |
7eb43d53 AH |
1771 | u32 status; |
1772 | u32 blocks; | |
1773 | int err; | |
81196976 | 1774 | |
7eb43d53 AH |
1775 | /* |
1776 | * Some errors the host driver might not have seen. Set the number of | |
1777 | * bytes transferred to zero in that case. | |
1778 | */ | |
1779 | err = __mmc_send_status(card, &status, 0); | |
1780 | if (err || mmc_blk_status_error(req, status)) | |
1781 | brq->data.bytes_xfered = 0; | |
81196976 AH |
1782 | |
1783 | mmc_retune_release(card->host); | |
1784 | ||
1785 | /* | |
7eb43d53 AH |
1786 | * Try again to get the status. This also provides an opportunity for |
1787 | * re-tuning. | |
81196976 | 1788 | */ |
7eb43d53 AH |
1789 | if (err) |
1790 | err = __mmc_send_status(card, &status, 0); | |
81196976 | 1791 | |
7eb43d53 AH |
1792 | /* |
1793 | * Nothing more to do after the number of bytes transferred has been | |
1794 | * updated and there is no card. | |
1795 | */ | |
1796 | if (err && mmc_detect_card_removed(card->host)) | |
1797 | return; | |
81196976 | 1798 | |
7eb43d53 AH |
1799 | /* Try to get back to "tran" state */ |
1800 | if (!mmc_host_is_spi(mq->card->host) && | |
40c96853 | 1801 | (err || !mmc_ready_for_data(status))) |
7eb43d53 AH |
1802 | err = mmc_blk_fix_state(mq->card, req); |
1803 | ||
1804 | /* | |
1805 | * Special case for SD cards where the card might record the number of | |
1806 | * blocks written. | |
1807 | */ | |
1808 | if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) && | |
1809 | rq_data_dir(req) == WRITE) { | |
1810 | if (mmc_sd_num_wr_blocks(card, &blocks)) | |
1811 | brq->data.bytes_xfered = 0; | |
1812 | else | |
1813 | brq->data.bytes_xfered = blocks << 9; | |
81196976 | 1814 | } |
7eb43d53 AH |
1815 | |
1816 | /* Reset if the card is in a bad state */ | |
1817 | if (!mmc_host_is_spi(mq->card->host) && | |
1818 | err && mmc_blk_reset(md, card->host, type)) { | |
1819 | pr_err("%s: recovery failed!\n", req->rq_disk->disk_name); | |
81196976 | 1820 | mqrq->retries = MMC_NO_RETRIES; |
7eb43d53 AH |
1821 | return; |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * If anything was done, just return and if there is anything remaining | |
1826 | * on the request it will get requeued. | |
1827 | */ | |
1828 | if (brq->data.bytes_xfered) | |
1829 | return; | |
1830 | ||
1831 | /* Reset before last retry */ | |
1832 | if (mqrq->retries + 1 == MMC_MAX_RETRIES) | |
1833 | mmc_blk_reset(md, card->host, type); | |
1834 | ||
1835 | /* Command errors fail fast, so use all MMC_MAX_RETRIES */ | |
1836 | if (brq->sbc.error || brq->cmd.error) | |
1837 | return; | |
1838 | ||
1839 | /* Reduce the remaining retries for data errors */ | |
1840 | if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) { | |
1841 | mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES; | |
1842 | return; | |
1843 | } | |
1844 | ||
1845 | /* FIXME: Missing single sector read for large sector size */ | |
1846 | if (!mmc_large_sector(card) && rq_data_dir(req) == READ && | |
1847 | brq->data.blocks > 1) { | |
1848 | /* Read one sector at a time */ | |
1849 | mmc_blk_read_single(mq, req); | |
1850 | return; | |
81196976 AH |
1851 | } |
1852 | } | |
1853 | ||
10f21df4 AH |
1854 | static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) |
1855 | { | |
1856 | mmc_blk_eval_resp_error(brq); | |
1857 | ||
1858 | return brq->sbc.error || brq->cmd.error || brq->stop.error || | |
1859 | brq->data.error || brq->cmd.resp[0] & CMD_ERRORS; | |
1860 | } | |
1861 | ||
88a51646 AH |
1862 | static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) |
1863 | { | |
1864 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
f47a1fe3 | 1865 | u32 status = 0; |
88a51646 AH |
1866 | int err; |
1867 | ||
1868 | if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) | |
1869 | return 0; | |
1870 | ||
3869468e | 1871 | err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, &status); |
88a51646 | 1872 | |
f47a1fe3 AH |
1873 | /* |
1874 | * Do not assume data transferred correctly if there are any error bits | |
1875 | * set. | |
1876 | */ | |
1877 | if (status & mmc_blk_stop_err_bits(&mqrq->brq)) { | |
1878 | mqrq->brq.data.bytes_xfered = 0; | |
88a51646 AH |
1879 | err = err ? err : -EIO; |
1880 | } | |
1881 | ||
f47a1fe3 AH |
1882 | /* Copy the exception bit so it will be seen later on */ |
1883 | if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT) | |
1884 | mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; | |
1885 | ||
88a51646 AH |
1886 | return err; |
1887 | } | |
1888 | ||
10f21df4 AH |
1889 | static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq, |
1890 | struct request *req) | |
1891 | { | |
1892 | int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; | |
1893 | ||
1894 | mmc_blk_reset_success(mq->blkdata, type); | |
1895 | } | |
1896 | ||
81196976 AH |
1897 | static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req) |
1898 | { | |
1899 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
1900 | unsigned int nr_bytes = mqrq->brq.data.bytes_xfered; | |
1901 | ||
1902 | if (nr_bytes) { | |
1903 | if (blk_update_request(req, BLK_STS_OK, nr_bytes)) | |
1904 | blk_mq_requeue_request(req, true); | |
1905 | else | |
1906 | __blk_mq_end_request(req, BLK_STS_OK); | |
1907 | } else if (!blk_rq_bytes(req)) { | |
1908 | __blk_mq_end_request(req, BLK_STS_IOERR); | |
1909 | } else if (mqrq->retries++ < MMC_MAX_RETRIES) { | |
1910 | blk_mq_requeue_request(req, true); | |
1911 | } else { | |
1912 | if (mmc_card_removed(mq->card)) | |
1913 | req->rq_flags |= RQF_QUIET; | |
1914 | blk_mq_end_request(req, BLK_STS_IOERR); | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq, | |
1919 | struct mmc_queue_req *mqrq) | |
1920 | { | |
1921 | return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) && | |
1922 | (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT || | |
1923 | mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT); | |
1924 | } | |
1925 | ||
1926 | static void mmc_blk_urgent_bkops(struct mmc_queue *mq, | |
1927 | struct mmc_queue_req *mqrq) | |
1928 | { | |
1929 | if (mmc_blk_urgent_bkops_needed(mq, mqrq)) | |
0c204979 | 1930 | mmc_run_bkops(mq->card); |
81196976 AH |
1931 | } |
1932 | ||
511ce378 BW |
1933 | static void mmc_blk_hsq_req_done(struct mmc_request *mrq) |
1934 | { | |
1935 | struct mmc_queue_req *mqrq = | |
1936 | container_of(mrq, struct mmc_queue_req, brq.mrq); | |
1937 | struct request *req = mmc_queue_req_to_req(mqrq); | |
1938 | struct request_queue *q = req->q; | |
1939 | struct mmc_queue *mq = q->queuedata; | |
1940 | struct mmc_host *host = mq->card->host; | |
1941 | unsigned long flags; | |
1942 | ||
1943 | if (mmc_blk_rq_error(&mqrq->brq) || | |
1944 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
1945 | spin_lock_irqsave(&mq->lock, flags); | |
1946 | mq->recovery_needed = true; | |
1947 | mq->recovery_req = req; | |
1948 | spin_unlock_irqrestore(&mq->lock, flags); | |
1949 | ||
1950 | host->cqe_ops->cqe_recovery_start(host); | |
1951 | ||
1952 | schedule_work(&mq->recovery_work); | |
1953 | return; | |
1954 | } | |
1955 | ||
1956 | mmc_blk_rw_reset_success(mq, req); | |
1957 | ||
1958 | /* | |
1959 | * Block layer timeouts race with completions which means the normal | |
1960 | * completion path cannot be used during recovery. | |
1961 | */ | |
1962 | if (mq->in_recovery) | |
1963 | mmc_blk_cqe_complete_rq(mq, req); | |
1964 | else | |
1965 | blk_mq_complete_request(req); | |
1966 | } | |
1967 | ||
81196976 AH |
1968 | void mmc_blk_mq_complete(struct request *req) |
1969 | { | |
1970 | struct mmc_queue *mq = req->q->queuedata; | |
1971 | ||
1e8e55b6 AH |
1972 | if (mq->use_cqe) |
1973 | mmc_blk_cqe_complete_rq(mq, req); | |
1974 | else | |
1975 | mmc_blk_mq_complete_rq(mq, req); | |
81196976 AH |
1976 | } |
1977 | ||
1978 | static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, | |
1979 | struct request *req) | |
1980 | { | |
1981 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
88a51646 | 1982 | struct mmc_host *host = mq->card->host; |
81196976 | 1983 | |
88a51646 AH |
1984 | if (mmc_blk_rq_error(&mqrq->brq) || |
1985 | mmc_blk_card_busy(mq->card, req)) { | |
1986 | mmc_blk_mq_rw_recovery(mq, req); | |
1987 | } else { | |
1988 | mmc_blk_rw_reset_success(mq, req); | |
1989 | mmc_retune_release(host); | |
1990 | } | |
81196976 AH |
1991 | |
1992 | mmc_blk_urgent_bkops(mq, mqrq); | |
1993 | } | |
1994 | ||
1995 | static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) | |
1996 | { | |
81196976 AH |
1997 | unsigned long flags; |
1998 | bool put_card; | |
1999 | ||
f5d72c5c | 2000 | spin_lock_irqsave(&mq->lock, flags); |
81196976 AH |
2001 | |
2002 | mq->in_flight[mmc_issue_type(mq, req)] -= 1; | |
2003 | ||
2004 | put_card = (mmc_tot_in_flight(mq) == 0); | |
2005 | ||
f5d72c5c | 2006 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2007 | |
2008 | if (put_card) | |
2009 | mmc_put_card(mq->card, &mq->ctx); | |
2010 | } | |
2011 | ||
2012 | static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) | |
2013 | { | |
2014 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2015 | struct mmc_request *mrq = &mqrq->brq.mrq; | |
2016 | struct mmc_host *host = mq->card->host; | |
2017 | ||
2018 | mmc_post_req(host, mrq, 0); | |
2019 | ||
10f21df4 AH |
2020 | /* |
2021 | * Block layer timeouts race with completions which means the normal | |
2022 | * completion path cannot be used during recovery. | |
2023 | */ | |
2024 | if (mq->in_recovery) | |
2025 | mmc_blk_mq_complete_rq(mq, req); | |
2026 | else | |
2027 | blk_mq_complete_request(req); | |
81196976 AH |
2028 | |
2029 | mmc_blk_mq_dec_in_flight(mq, req); | |
2030 | } | |
2031 | ||
10f21df4 AH |
2032 | void mmc_blk_mq_recovery(struct mmc_queue *mq) |
2033 | { | |
2034 | struct request *req = mq->recovery_req; | |
2035 | struct mmc_host *host = mq->card->host; | |
2036 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2037 | ||
2038 | mq->recovery_req = NULL; | |
2039 | mq->rw_wait = false; | |
2040 | ||
2041 | if (mmc_blk_rq_error(&mqrq->brq)) { | |
2042 | mmc_retune_hold_now(host); | |
2043 | mmc_blk_mq_rw_recovery(mq, req); | |
2044 | } | |
2045 | ||
2046 | mmc_blk_urgent_bkops(mq, mqrq); | |
2047 | ||
2048 | mmc_blk_mq_post_req(mq, req); | |
2049 | } | |
2050 | ||
81196976 AH |
2051 | static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, |
2052 | struct request **prev_req) | |
2053 | { | |
10f21df4 AH |
2054 | if (mmc_host_done_complete(mq->card->host)) |
2055 | return; | |
2056 | ||
81196976 AH |
2057 | mutex_lock(&mq->complete_lock); |
2058 | ||
2059 | if (!mq->complete_req) | |
2060 | goto out_unlock; | |
2061 | ||
2062 | mmc_blk_mq_poll_completion(mq, mq->complete_req); | |
2063 | ||
2064 | if (prev_req) | |
2065 | *prev_req = mq->complete_req; | |
2066 | else | |
2067 | mmc_blk_mq_post_req(mq, mq->complete_req); | |
2068 | ||
2069 | mq->complete_req = NULL; | |
2070 | ||
2071 | out_unlock: | |
2072 | mutex_unlock(&mq->complete_lock); | |
2073 | } | |
2074 | ||
2075 | void mmc_blk_mq_complete_work(struct work_struct *work) | |
2076 | { | |
2077 | struct mmc_queue *mq = container_of(work, struct mmc_queue, | |
2078 | complete_work); | |
2079 | ||
2080 | mmc_blk_mq_complete_prev_req(mq, NULL); | |
2081 | } | |
2082 | ||
2083 | static void mmc_blk_mq_req_done(struct mmc_request *mrq) | |
2084 | { | |
2085 | struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, | |
2086 | brq.mrq); | |
2087 | struct request *req = mmc_queue_req_to_req(mqrq); | |
2088 | struct request_queue *q = req->q; | |
2089 | struct mmc_queue *mq = q->queuedata; | |
10f21df4 | 2090 | struct mmc_host *host = mq->card->host; |
81196976 | 2091 | unsigned long flags; |
81196976 | 2092 | |
10f21df4 AH |
2093 | if (!mmc_host_done_complete(host)) { |
2094 | bool waiting; | |
81196976 | 2095 | |
10f21df4 AH |
2096 | /* |
2097 | * We cannot complete the request in this context, so record | |
2098 | * that there is a request to complete, and that a following | |
2099 | * request does not need to wait (although it does need to | |
2100 | * complete complete_req first). | |
2101 | */ | |
f5d72c5c | 2102 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2103 | mq->complete_req = req; |
2104 | mq->rw_wait = false; | |
2105 | waiting = mq->waiting; | |
f5d72c5c | 2106 | spin_unlock_irqrestore(&mq->lock, flags); |
10f21df4 AH |
2107 | |
2108 | /* | |
2109 | * If 'waiting' then the waiting task will complete this | |
2110 | * request, otherwise queue a work to do it. Note that | |
2111 | * complete_work may still race with the dispatch of a following | |
2112 | * request. | |
2113 | */ | |
2114 | if (waiting) | |
2115 | wake_up(&mq->wait); | |
2116 | else | |
dcf6e2e3 | 2117 | queue_work(mq->card->complete_wq, &mq->complete_work); |
10f21df4 AH |
2118 | |
2119 | return; | |
2120 | } | |
2121 | ||
2122 | /* Take the recovery path for errors or urgent background operations */ | |
2123 | if (mmc_blk_rq_error(&mqrq->brq) || | |
2124 | mmc_blk_urgent_bkops_needed(mq, mqrq)) { | |
f5d72c5c | 2125 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2126 | mq->recovery_needed = true; |
2127 | mq->recovery_req = req; | |
f5d72c5c | 2128 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 | 2129 | wake_up(&mq->wait); |
10f21df4 AH |
2130 | schedule_work(&mq->recovery_work); |
2131 | return; | |
2132 | } | |
2133 | ||
2134 | mmc_blk_rw_reset_success(mq, req); | |
2135 | ||
2136 | mq->rw_wait = false; | |
2137 | wake_up(&mq->wait); | |
2138 | ||
2139 | mmc_blk_mq_post_req(mq, req); | |
81196976 AH |
2140 | } |
2141 | ||
2142 | static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) | |
2143 | { | |
81196976 AH |
2144 | unsigned long flags; |
2145 | bool done; | |
2146 | ||
2147 | /* | |
10f21df4 AH |
2148 | * Wait while there is another request in progress, but not if recovery |
2149 | * is needed. Also indicate whether there is a request waiting to start. | |
81196976 | 2150 | */ |
f5d72c5c | 2151 | spin_lock_irqsave(&mq->lock, flags); |
10f21df4 AH |
2152 | if (mq->recovery_needed) { |
2153 | *err = -EBUSY; | |
2154 | done = true; | |
2155 | } else { | |
2156 | done = !mq->rw_wait; | |
2157 | } | |
81196976 | 2158 | mq->waiting = !done; |
f5d72c5c | 2159 | spin_unlock_irqrestore(&mq->lock, flags); |
81196976 AH |
2160 | |
2161 | return done; | |
2162 | } | |
2163 | ||
2164 | static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req) | |
2165 | { | |
2166 | int err = 0; | |
2167 | ||
2168 | wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err)); | |
2169 | ||
2170 | /* Always complete the previous request if there is one */ | |
2171 | mmc_blk_mq_complete_prev_req(mq, prev_req); | |
2172 | ||
2173 | return err; | |
2174 | } | |
2175 | ||
2176 | static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, | |
2177 | struct request *req) | |
2178 | { | |
2179 | struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); | |
2180 | struct mmc_host *host = mq->card->host; | |
2181 | struct request *prev_req = NULL; | |
2182 | int err = 0; | |
2183 | ||
2184 | mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); | |
2185 | ||
2186 | mqrq->brq.mrq.done = mmc_blk_mq_req_done; | |
2187 | ||
2188 | mmc_pre_req(host, &mqrq->brq.mrq); | |
2189 | ||
2190 | err = mmc_blk_rw_wait(mq, &prev_req); | |
2191 | if (err) | |
2192 | goto out_post_req; | |
2193 | ||
2194 | mq->rw_wait = true; | |
2195 | ||
2196 | err = mmc_start_request(host, &mqrq->brq.mrq); | |
2197 | ||
2198 | if (prev_req) | |
2199 | mmc_blk_mq_post_req(mq, prev_req); | |
2200 | ||
10f21df4 | 2201 | if (err) |
81196976 | 2202 | mq->rw_wait = false; |
10f21df4 AH |
2203 | |
2204 | /* Release re-tuning here where there is no synchronization required */ | |
2205 | if (err || mmc_host_done_complete(host)) | |
81196976 | 2206 | mmc_retune_release(host); |
81196976 AH |
2207 | |
2208 | out_post_req: | |
2209 | if (err) | |
2210 | mmc_post_req(host, &mqrq->brq.mrq, err); | |
2211 | ||
2212 | return err; | |
2213 | } | |
2214 | ||
2215 | static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host) | |
2216 | { | |
1e8e55b6 AH |
2217 | if (mq->use_cqe) |
2218 | return host->cqe_ops->cqe_wait_for_idle(host); | |
2219 | ||
81196976 AH |
2220 | return mmc_blk_rw_wait(mq, NULL); |
2221 | } | |
2222 | ||
2223 | enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) | |
2224 | { | |
2225 | struct mmc_blk_data *md = mq->blkdata; | |
2226 | struct mmc_card *card = md->queue.card; | |
2227 | struct mmc_host *host = card->host; | |
2228 | int ret; | |
2229 | ||
2230 | ret = mmc_blk_part_switch(card, md->part_type); | |
2231 | if (ret) | |
2232 | return MMC_REQ_FAILED_TO_START; | |
2233 | ||
2234 | switch (mmc_issue_type(mq, req)) { | |
2235 | case MMC_ISSUE_SYNC: | |
2236 | ret = mmc_blk_wait_for_idle(mq, host); | |
2237 | if (ret) | |
2238 | return MMC_REQ_BUSY; | |
2239 | switch (req_op(req)) { | |
2240 | case REQ_OP_DRV_IN: | |
2241 | case REQ_OP_DRV_OUT: | |
2242 | mmc_blk_issue_drv_op(mq, req); | |
2243 | break; | |
2244 | case REQ_OP_DISCARD: | |
2245 | mmc_blk_issue_discard_rq(mq, req); | |
2246 | break; | |
2247 | case REQ_OP_SECURE_ERASE: | |
2248 | mmc_blk_issue_secdiscard_rq(mq, req); | |
2249 | break; | |
2250 | case REQ_OP_FLUSH: | |
2251 | mmc_blk_issue_flush(mq, req); | |
2252 | break; | |
2253 | default: | |
2254 | WARN_ON_ONCE(1); | |
2255 | return MMC_REQ_FAILED_TO_START; | |
2256 | } | |
2257 | return MMC_REQ_FINISHED; | |
1e8e55b6 | 2258 | case MMC_ISSUE_DCMD: |
81196976 AH |
2259 | case MMC_ISSUE_ASYNC: |
2260 | switch (req_op(req)) { | |
1e8e55b6 AH |
2261 | case REQ_OP_FLUSH: |
2262 | ret = mmc_blk_cqe_issue_flush(mq, req); | |
2263 | break; | |
81196976 AH |
2264 | case REQ_OP_READ: |
2265 | case REQ_OP_WRITE: | |
1e8e55b6 AH |
2266 | if (mq->use_cqe) |
2267 | ret = mmc_blk_cqe_issue_rw_rq(mq, req); | |
2268 | else | |
2269 | ret = mmc_blk_mq_issue_rw_rq(mq, req); | |
81196976 AH |
2270 | break; |
2271 | default: | |
2272 | WARN_ON_ONCE(1); | |
2273 | ret = -EINVAL; | |
2274 | } | |
2275 | if (!ret) | |
2276 | return MMC_REQ_STARTED; | |
2277 | return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START; | |
2278 | default: | |
2279 | WARN_ON_ONCE(1); | |
2280 | return MMC_REQ_FAILED_TO_START; | |
2281 | } | |
2282 | } | |
2283 | ||
a6f6c96b RK |
2284 | static inline int mmc_blk_readonly(struct mmc_card *card) |
2285 | { | |
2286 | return mmc_card_readonly(card) || | |
2287 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
2288 | } | |
2289 | ||
371a689f AW |
2290 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
2291 | struct device *parent, | |
2292 | sector_t size, | |
2293 | bool default_ro, | |
add710ea JR |
2294 | const char *subname, |
2295 | int area_type) | |
1da177e4 LT |
2296 | { |
2297 | struct mmc_blk_data *md; | |
2298 | int devidx, ret; | |
2299 | ||
a04848c7 | 2300 | devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); |
e7b42769 SL |
2301 | if (devidx < 0) { |
2302 | /* | |
2303 | * We get -ENOSPC because there are no more any available | |
2304 | * devidx. The reason may be that, either userspace haven't yet | |
2305 | * unmounted the partitions, which postpones mmc_blk_release() | |
2306 | * from being called, or the device has more partitions than | |
2307 | * what we support. | |
2308 | */ | |
2309 | if (devidx == -ENOSPC) | |
2310 | dev_err(mmc_dev(card->host), | |
2311 | "no more device IDs available\n"); | |
2312 | ||
a04848c7 | 2313 | return ERR_PTR(devidx); |
e7b42769 | 2314 | } |
1da177e4 | 2315 | |
dd00cc48 | 2316 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
2317 | if (!md) { |
2318 | ret = -ENOMEM; | |
2319 | goto out; | |
2320 | } | |
1da177e4 | 2321 | |
add710ea JR |
2322 | md->area_type = area_type; |
2323 | ||
a6f6c96b RK |
2324 | /* |
2325 | * Set the read-only status based on the supported commands | |
2326 | * and the write protect switch. | |
2327 | */ | |
2328 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 2329 | |
5e71b7a6 | 2330 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
2331 | if (md->disk == NULL) { |
2332 | ret = -ENOMEM; | |
2333 | goto err_kfree; | |
2334 | } | |
1da177e4 | 2335 | |
371a689f | 2336 | INIT_LIST_HEAD(&md->part); |
97548575 | 2337 | INIT_LIST_HEAD(&md->rpmbs); |
a6f6c96b | 2338 | md->usage = 1; |
1da177e4 | 2339 | |
f5d72c5c | 2340 | ret = mmc_init_queue(&md->queue, card); |
a6f6c96b RK |
2341 | if (ret) |
2342 | goto err_putdisk; | |
1da177e4 | 2343 | |
7db3028e | 2344 | md->queue.blkdata = md; |
d2b18394 | 2345 | |
41e3efd0 AH |
2346 | /* |
2347 | * Keep an extra reference to the queue so that we can shutdown the | |
2348 | * queue (i.e. call blk_cleanup_queue()) while there are still | |
2349 | * references to the 'md'. The corresponding blk_put_queue() is in | |
2350 | * mmc_blk_put(). | |
2351 | */ | |
2352 | if (!blk_get_queue(md->queue.queue)) { | |
2353 | mmc_cleanup_queue(&md->queue); | |
2361bfb0 | 2354 | ret = -ENODEV; |
41e3efd0 AH |
2355 | goto err_putdisk; |
2356 | } | |
2357 | ||
fe6b4c88 | 2358 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 2359 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
2360 | md->disk->fops = &mmc_bdops; |
2361 | md->disk->private_data = md; | |
2362 | md->disk->queue = md->queue.queue; | |
307d8e6f | 2363 | md->parent = parent; |
371a689f | 2364 | set_disk_ro(md->disk, md->read_only || default_ro); |
382c55f8 | 2365 | md->disk->flags = GENHD_FL_EXT_DEVT; |
f5b4d71f | 2366 | if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) |
207b652c AG |
2367 | md->disk->flags |= GENHD_FL_NO_PART_SCAN |
2368 | | GENHD_FL_SUPPRESS_PARTITION_INFO; | |
a6f6c96b RK |
2369 | |
2370 | /* | |
2371 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
2372 | * | |
2373 | * - be set for removable media with permanent block devices | |
2374 | * - be unset for removable block devices with permanent media | |
2375 | * | |
2376 | * Since MMC block devices clearly fall under the second | |
2377 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
2378 | * should use the block device creation/destruction hotplug | |
2379 | * messages to tell when the card is present. | |
2380 | */ | |
2381 | ||
f06c9153 | 2382 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
9aaf3437 | 2383 | "mmcblk%u%s", card->host->index, subname ? subname : ""); |
a6f6c96b | 2384 | |
371a689f | 2385 | set_capacity(md->disk, size); |
d0c97cfb | 2386 | |
f0d89972 | 2387 | if (mmc_host_cmd23(card->host)) { |
0ed50abb DG |
2388 | if ((mmc_card_mmc(card) && |
2389 | card->csd.mmca_vsn >= CSD_SPEC_VER_3) || | |
f0d89972 AW |
2390 | (mmc_card_sd(card) && |
2391 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
2392 | md->flags |= MMC_BLK_CMD23; | |
2393 | } | |
d0c97cfb AW |
2394 | |
2395 | if (mmc_card_mmc(card) && | |
2396 | md->flags & MMC_BLK_CMD23 && | |
2397 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || | |
2398 | card->ext_csd.rel_sectors)) { | |
2399 | md->flags |= MMC_BLK_REL_WR; | |
e9d5c746 | 2400 | blk_queue_write_cache(md->queue.queue, true, true); |
d0c97cfb AW |
2401 | } |
2402 | ||
371a689f AW |
2403 | return md; |
2404 | ||
2405 | err_putdisk: | |
2406 | put_disk(md->disk); | |
2407 | err_kfree: | |
2408 | kfree(md); | |
2409 | out: | |
a04848c7 | 2410 | ida_simple_remove(&mmc_blk_ida, devidx); |
371a689f AW |
2411 | return ERR_PTR(ret); |
2412 | } | |
2413 | ||
2414 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
2415 | { | |
2416 | sector_t size; | |
a6f6c96b | 2417 | |
85a18ad9 PO |
2418 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
2419 | /* | |
2420 | * The EXT_CSD sector count is in number or 512 byte | |
2421 | * sectors. | |
2422 | */ | |
371a689f | 2423 | size = card->ext_csd.sectors; |
85a18ad9 PO |
2424 | } else { |
2425 | /* | |
2426 | * The CSD capacity field is in units of read_blkbits. | |
2427 | * set_capacity takes units of 512 bytes. | |
2428 | */ | |
087de9ed KM |
2429 | size = (typeof(sector_t))card->csd.capacity |
2430 | << (card->csd.read_blkbits - 9); | |
85a18ad9 | 2431 | } |
371a689f | 2432 | |
7a30f2af | 2433 | return mmc_blk_alloc_req(card, &card->dev, size, false, NULL, |
add710ea | 2434 | MMC_BLK_DATA_AREA_MAIN); |
371a689f | 2435 | } |
a6f6c96b | 2436 | |
371a689f AW |
2437 | static int mmc_blk_alloc_part(struct mmc_card *card, |
2438 | struct mmc_blk_data *md, | |
2439 | unsigned int part_type, | |
2440 | sector_t size, | |
2441 | bool default_ro, | |
add710ea JR |
2442 | const char *subname, |
2443 | int area_type) | |
371a689f AW |
2444 | { |
2445 | char cap_str[10]; | |
2446 | struct mmc_blk_data *part_md; | |
2447 | ||
2448 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
add710ea | 2449 | subname, area_type); |
371a689f AW |
2450 | if (IS_ERR(part_md)) |
2451 | return PTR_ERR(part_md); | |
2452 | part_md->part_type = part_type; | |
2453 | list_add(&part_md->part, &md->part); | |
2454 | ||
b9f28d86 | 2455 | string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2, |
371a689f | 2456 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2457 | pr_info("%s: %s %s partition %u %s\n", |
371a689f AW |
2458 | part_md->disk->disk_name, mmc_card_id(card), |
2459 | mmc_card_name(card), part_md->part_type, cap_str); | |
2460 | return 0; | |
2461 | } | |
2462 | ||
97548575 LW |
2463 | /** |
2464 | * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev | |
2465 | * @filp: the character device file | |
2466 | * @cmd: the ioctl() command | |
2467 | * @arg: the argument from userspace | |
2468 | * | |
2469 | * This will essentially just redirect the ioctl()s coming in over to | |
2470 | * the main block device spawning the RPMB character device. | |
2471 | */ | |
2472 | static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd, | |
2473 | unsigned long arg) | |
2474 | { | |
2475 | struct mmc_rpmb_data *rpmb = filp->private_data; | |
2476 | int ret; | |
2477 | ||
2478 | switch (cmd) { | |
2479 | case MMC_IOC_CMD: | |
2480 | ret = mmc_blk_ioctl_cmd(rpmb->md, | |
2481 | (struct mmc_ioc_cmd __user *)arg, | |
2482 | rpmb); | |
2483 | break; | |
2484 | case MMC_IOC_MULTI_CMD: | |
2485 | ret = mmc_blk_ioctl_multi_cmd(rpmb->md, | |
2486 | (struct mmc_ioc_multi_cmd __user *)arg, | |
2487 | rpmb); | |
2488 | break; | |
2489 | default: | |
2490 | ret = -EINVAL; | |
2491 | break; | |
2492 | } | |
2493 | ||
b25b750d | 2494 | return ret; |
97548575 LW |
2495 | } |
2496 | ||
2497 | #ifdef CONFIG_COMPAT | |
2498 | static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd, | |
2499 | unsigned long arg) | |
2500 | { | |
2501 | return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
2502 | } | |
2503 | #endif | |
2504 | ||
2505 | static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp) | |
2506 | { | |
2507 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2508 | struct mmc_rpmb_data, chrdev); | |
2509 | ||
2510 | get_device(&rpmb->dev); | |
2511 | filp->private_data = rpmb; | |
1c87f735 | 2512 | mmc_blk_get(rpmb->md->disk); |
97548575 LW |
2513 | |
2514 | return nonseekable_open(inode, filp); | |
2515 | } | |
2516 | ||
2517 | static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp) | |
2518 | { | |
2519 | struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, | |
2520 | struct mmc_rpmb_data, chrdev); | |
2521 | ||
2522 | put_device(&rpmb->dev); | |
1c87f735 | 2523 | mmc_blk_put(rpmb->md); |
97548575 LW |
2524 | |
2525 | return 0; | |
2526 | } | |
2527 | ||
2528 | static const struct file_operations mmc_rpmb_fileops = { | |
2529 | .release = mmc_rpmb_chrdev_release, | |
2530 | .open = mmc_rpmb_chrdev_open, | |
2531 | .owner = THIS_MODULE, | |
2532 | .llseek = no_llseek, | |
2533 | .unlocked_ioctl = mmc_rpmb_ioctl, | |
2534 | #ifdef CONFIG_COMPAT | |
2535 | .compat_ioctl = mmc_rpmb_ioctl_compat, | |
2536 | #endif | |
2537 | }; | |
2538 | ||
1c87f735 LW |
2539 | static void mmc_blk_rpmb_device_release(struct device *dev) |
2540 | { | |
2541 | struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); | |
2542 | ||
2543 | ida_simple_remove(&mmc_rpmb_ida, rpmb->id); | |
2544 | kfree(rpmb); | |
2545 | } | |
97548575 LW |
2546 | |
2547 | static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, | |
2548 | struct mmc_blk_data *md, | |
2549 | unsigned int part_index, | |
2550 | sector_t size, | |
2551 | const char *subname) | |
2552 | { | |
2553 | int devidx, ret; | |
2554 | char rpmb_name[DISK_NAME_LEN]; | |
2555 | char cap_str[10]; | |
2556 | struct mmc_rpmb_data *rpmb; | |
2557 | ||
2558 | /* This creates the minor number for the RPMB char device */ | |
2559 | devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL); | |
2560 | if (devidx < 0) | |
2561 | return devidx; | |
2562 | ||
2563 | rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL); | |
1c87f735 LW |
2564 | if (!rpmb) { |
2565 | ida_simple_remove(&mmc_rpmb_ida, devidx); | |
97548575 | 2566 | return -ENOMEM; |
1c87f735 | 2567 | } |
97548575 LW |
2568 | |
2569 | snprintf(rpmb_name, sizeof(rpmb_name), | |
2570 | "mmcblk%u%s", card->host->index, subname ? subname : ""); | |
2571 | ||
2572 | rpmb->id = devidx; | |
2573 | rpmb->part_index = part_index; | |
2574 | rpmb->dev.init_name = rpmb_name; | |
2575 | rpmb->dev.bus = &mmc_rpmb_bus_type; | |
2576 | rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id); | |
2577 | rpmb->dev.parent = &card->dev; | |
1c87f735 | 2578 | rpmb->dev.release = mmc_blk_rpmb_device_release; |
97548575 LW |
2579 | device_initialize(&rpmb->dev); |
2580 | dev_set_drvdata(&rpmb->dev, rpmb); | |
2581 | rpmb->md = md; | |
2582 | ||
2583 | cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops); | |
2584 | rpmb->chrdev.owner = THIS_MODULE; | |
2585 | ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev); | |
2586 | if (ret) { | |
2587 | pr_err("%s: could not add character device\n", rpmb_name); | |
1c87f735 | 2588 | goto out_put_device; |
97548575 LW |
2589 | } |
2590 | ||
2591 | list_add(&rpmb->node, &md->rpmbs); | |
2592 | ||
2593 | string_get_size((u64)size, 512, STRING_UNITS_2, | |
2594 | cap_str, sizeof(cap_str)); | |
2595 | ||
2596 | pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n", | |
2597 | rpmb_name, mmc_card_id(card), | |
2598 | mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str, | |
2599 | MAJOR(mmc_rpmb_devt), rpmb->id); | |
2600 | ||
2601 | return 0; | |
2602 | ||
1c87f735 LW |
2603 | out_put_device: |
2604 | put_device(&rpmb->dev); | |
97548575 LW |
2605 | return ret; |
2606 | } | |
2607 | ||
2608 | static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb) | |
1c87f735 | 2609 | |
97548575 LW |
2610 | { |
2611 | cdev_device_del(&rpmb->chrdev, &rpmb->dev); | |
1c87f735 | 2612 | put_device(&rpmb->dev); |
97548575 LW |
2613 | } |
2614 | ||
e0c368d5 NJ |
2615 | /* MMC Physical partitions consist of two boot partitions and |
2616 | * up to four general purpose partitions. | |
2617 | * For each partition enabled in EXT_CSD a block device will be allocatedi | |
2618 | * to provide access to the partition. | |
2619 | */ | |
2620 | ||
371a689f AW |
2621 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) |
2622 | { | |
97548575 | 2623 | int idx, ret; |
371a689f AW |
2624 | |
2625 | if (!mmc_card_mmc(card)) | |
2626 | return 0; | |
2627 | ||
e0c368d5 | 2628 | for (idx = 0; idx < card->nr_parts; idx++) { |
97548575 LW |
2629 | if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) { |
2630 | /* | |
2631 | * RPMB partitions does not provide block access, they | |
2632 | * are only accessed using ioctl():s. Thus create | |
2633 | * special RPMB block devices that do not have a | |
2634 | * backing block queue for these. | |
2635 | */ | |
2636 | ret = mmc_blk_alloc_rpmb_part(card, md, | |
2637 | card->part[idx].part_cfg, | |
2638 | card->part[idx].size >> 9, | |
2639 | card->part[idx].name); | |
2640 | if (ret) | |
2641 | return ret; | |
2642 | } else if (card->part[idx].size) { | |
e0c368d5 NJ |
2643 | ret = mmc_blk_alloc_part(card, md, |
2644 | card->part[idx].part_cfg, | |
2645 | card->part[idx].size >> 9, | |
2646 | card->part[idx].force_ro, | |
add710ea JR |
2647 | card->part[idx].name, |
2648 | card->part[idx].area_type); | |
e0c368d5 NJ |
2649 | if (ret) |
2650 | return ret; | |
2651 | } | |
371a689f AW |
2652 | } |
2653 | ||
97548575 | 2654 | return 0; |
1da177e4 LT |
2655 | } |
2656 | ||
371a689f AW |
2657 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
2658 | { | |
add710ea JR |
2659 | struct mmc_card *card; |
2660 | ||
371a689f | 2661 | if (md) { |
fdfa20c1 PT |
2662 | /* |
2663 | * Flush remaining requests and free queues. It | |
2664 | * is freeing the queue that stops new requests | |
2665 | * from being accepted. | |
2666 | */ | |
8efb83a2 | 2667 | card = md->queue.card; |
371a689f AW |
2668 | if (md->disk->flags & GENHD_FL_UP) { |
2669 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
add710ea JR |
2670 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && |
2671 | card->ext_csd.boot_ro_lockable) | |
2672 | device_remove_file(disk_to_dev(md->disk), | |
2673 | &md->power_ro_lock); | |
371a689f | 2674 | |
371a689f AW |
2675 | del_gendisk(md->disk); |
2676 | } | |
57678e5a | 2677 | mmc_cleanup_queue(&md->queue); |
371a689f AW |
2678 | mmc_blk_put(md); |
2679 | } | |
2680 | } | |
2681 | ||
2682 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
2683 | struct mmc_blk_data *md) | |
2684 | { | |
2685 | struct list_head *pos, *q; | |
2686 | struct mmc_blk_data *part_md; | |
97548575 | 2687 | struct mmc_rpmb_data *rpmb; |
371a689f | 2688 | |
97548575 LW |
2689 | /* Remove RPMB partitions */ |
2690 | list_for_each_safe(pos, q, &md->rpmbs) { | |
2691 | rpmb = list_entry(pos, struct mmc_rpmb_data, node); | |
2692 | list_del(pos); | |
2693 | mmc_blk_remove_rpmb_part(rpmb); | |
2694 | } | |
2695 | /* Remove block partitions */ | |
371a689f AW |
2696 | list_for_each_safe(pos, q, &md->part) { |
2697 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
2698 | list_del(pos); | |
2699 | mmc_blk_remove_req(part_md); | |
2700 | } | |
2701 | } | |
2702 | ||
2703 | static int mmc_add_disk(struct mmc_blk_data *md) | |
2704 | { | |
2705 | int ret; | |
add710ea | 2706 | struct mmc_card *card = md->queue.card; |
371a689f | 2707 | |
fef912bf | 2708 | device_add_disk(md->parent, md->disk, NULL); |
371a689f AW |
2709 | md->force_ro.show = force_ro_show; |
2710 | md->force_ro.store = force_ro_store; | |
641c3187 | 2711 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
2712 | md->force_ro.attr.name = "force_ro"; |
2713 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
2714 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
2715 | if (ret) | |
add710ea JR |
2716 | goto force_ro_fail; |
2717 | ||
2718 | if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) && | |
2719 | card->ext_csd.boot_ro_lockable) { | |
88187398 | 2720 | umode_t mode; |
add710ea JR |
2721 | |
2722 | if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS) | |
2723 | mode = S_IRUGO; | |
2724 | else | |
2725 | mode = S_IRUGO | S_IWUSR; | |
2726 | ||
2727 | md->power_ro_lock.show = power_ro_lock_show; | |
2728 | md->power_ro_lock.store = power_ro_lock_store; | |
00d9ac08 | 2729 | sysfs_attr_init(&md->power_ro_lock.attr); |
add710ea JR |
2730 | md->power_ro_lock.attr.mode = mode; |
2731 | md->power_ro_lock.attr.name = | |
2732 | "ro_lock_until_next_power_on"; | |
2733 | ret = device_create_file(disk_to_dev(md->disk), | |
2734 | &md->power_ro_lock); | |
2735 | if (ret) | |
2736 | goto power_ro_lock_fail; | |
2737 | } | |
2738 | return ret; | |
2739 | ||
2740 | power_ro_lock_fail: | |
2741 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
2742 | force_ro_fail: | |
2743 | del_gendisk(md->disk); | |
371a689f AW |
2744 | |
2745 | return ret; | |
2746 | } | |
2747 | ||
627c3ccf LW |
2748 | #ifdef CONFIG_DEBUG_FS |
2749 | ||
2750 | static int mmc_dbg_card_status_get(void *data, u64 *val) | |
2751 | { | |
2752 | struct mmc_card *card = data; | |
2753 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2754 | struct mmc_queue *mq = &md->queue; | |
2755 | struct request *req; | |
2756 | int ret; | |
2757 | ||
2758 | /* Ask the block layer about the card status */ | |
ff005a06 | 2759 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2760 | if (IS_ERR(req)) |
2761 | return PTR_ERR(req); | |
627c3ccf LW |
2762 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS; |
2763 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2764 | ret = req_to_mmc_queue_req(req)->drv_op_result; | |
2765 | if (ret >= 0) { | |
2766 | *val = ret; | |
2767 | ret = 0; | |
2768 | } | |
34c089e8 | 2769 | blk_put_request(req); |
627c3ccf LW |
2770 | |
2771 | return ret; | |
2772 | } | |
f6a3d9d9 Y |
2773 | DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get, |
2774 | NULL, "%08llx\n"); | |
627c3ccf LW |
2775 | |
2776 | /* That is two digits * 512 + 1 for newline */ | |
2777 | #define EXT_CSD_STR_LEN 1025 | |
2778 | ||
2779 | static int mmc_ext_csd_open(struct inode *inode, struct file *filp) | |
2780 | { | |
2781 | struct mmc_card *card = inode->i_private; | |
2782 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); | |
2783 | struct mmc_queue *mq = &md->queue; | |
2784 | struct request *req; | |
2785 | char *buf; | |
2786 | ssize_t n = 0; | |
2787 | u8 *ext_csd; | |
2788 | int err, i; | |
2789 | ||
2790 | buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL); | |
2791 | if (!buf) | |
2792 | return -ENOMEM; | |
2793 | ||
2794 | /* Ask the block layer for the EXT CSD */ | |
ff005a06 | 2795 | req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0); |
fb8e456e AH |
2796 | if (IS_ERR(req)) { |
2797 | err = PTR_ERR(req); | |
2798 | goto out_free; | |
2799 | } | |
627c3ccf LW |
2800 | req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD; |
2801 | req_to_mmc_queue_req(req)->drv_op_data = &ext_csd; | |
2802 | blk_execute_rq(mq->queue, NULL, req, 0); | |
2803 | err = req_to_mmc_queue_req(req)->drv_op_result; | |
34c089e8 | 2804 | blk_put_request(req); |
627c3ccf LW |
2805 | if (err) { |
2806 | pr_err("FAILED %d\n", err); | |
2807 | goto out_free; | |
2808 | } | |
2809 | ||
2810 | for (i = 0; i < 512; i++) | |
2811 | n += sprintf(buf + n, "%02x", ext_csd[i]); | |
2812 | n += sprintf(buf + n, "\n"); | |
2813 | ||
2814 | if (n != EXT_CSD_STR_LEN) { | |
2815 | err = -EINVAL; | |
0be55579 | 2816 | kfree(ext_csd); |
627c3ccf LW |
2817 | goto out_free; |
2818 | } | |
2819 | ||
2820 | filp->private_data = buf; | |
2821 | kfree(ext_csd); | |
2822 | return 0; | |
2823 | ||
2824 | out_free: | |
2825 | kfree(buf); | |
2826 | return err; | |
2827 | } | |
2828 | ||
2829 | static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf, | |
2830 | size_t cnt, loff_t *ppos) | |
2831 | { | |
2832 | char *buf = filp->private_data; | |
2833 | ||
2834 | return simple_read_from_buffer(ubuf, cnt, ppos, | |
2835 | buf, EXT_CSD_STR_LEN); | |
2836 | } | |
2837 | ||
2838 | static int mmc_ext_csd_release(struct inode *inode, struct file *file) | |
2839 | { | |
2840 | kfree(file->private_data); | |
2841 | return 0; | |
2842 | } | |
2843 | ||
2844 | static const struct file_operations mmc_dbg_ext_csd_fops = { | |
2845 | .open = mmc_ext_csd_open, | |
2846 | .read = mmc_ext_csd_read, | |
2847 | .release = mmc_ext_csd_release, | |
2848 | .llseek = default_llseek, | |
2849 | }; | |
2850 | ||
f9f0da98 | 2851 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2852 | { |
2853 | struct dentry *root; | |
2854 | ||
2855 | if (!card->debugfs_root) | |
2856 | return 0; | |
2857 | ||
2858 | root = card->debugfs_root; | |
2859 | ||
2860 | if (mmc_card_mmc(card) || mmc_card_sd(card)) { | |
f9f0da98 | 2861 | md->status_dentry = |
f6a3d9d9 Y |
2862 | debugfs_create_file_unsafe("status", 0400, root, |
2863 | card, | |
2864 | &mmc_dbg_card_status_fops); | |
f9f0da98 | 2865 | if (!md->status_dentry) |
627c3ccf LW |
2866 | return -EIO; |
2867 | } | |
2868 | ||
2869 | if (mmc_card_mmc(card)) { | |
f9f0da98 AH |
2870 | md->ext_csd_dentry = |
2871 | debugfs_create_file("ext_csd", S_IRUSR, root, card, | |
2872 | &mmc_dbg_ext_csd_fops); | |
2873 | if (!md->ext_csd_dentry) | |
627c3ccf LW |
2874 | return -EIO; |
2875 | } | |
2876 | ||
2877 | return 0; | |
2878 | } | |
2879 | ||
f9f0da98 AH |
2880 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2881 | struct mmc_blk_data *md) | |
2882 | { | |
2883 | if (!card->debugfs_root) | |
2884 | return; | |
2885 | ||
2886 | if (!IS_ERR_OR_NULL(md->status_dentry)) { | |
2887 | debugfs_remove(md->status_dentry); | |
2888 | md->status_dentry = NULL; | |
2889 | } | |
2890 | ||
2891 | if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) { | |
2892 | debugfs_remove(md->ext_csd_dentry); | |
2893 | md->ext_csd_dentry = NULL; | |
2894 | } | |
2895 | } | |
627c3ccf LW |
2896 | |
2897 | #else | |
2898 | ||
f9f0da98 | 2899 | static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) |
627c3ccf LW |
2900 | { |
2901 | return 0; | |
2902 | } | |
2903 | ||
f9f0da98 AH |
2904 | static void mmc_blk_remove_debugfs(struct mmc_card *card, |
2905 | struct mmc_blk_data *md) | |
2906 | { | |
2907 | } | |
2908 | ||
627c3ccf LW |
2909 | #endif /* CONFIG_DEBUG_FS */ |
2910 | ||
96541bac | 2911 | static int mmc_blk_probe(struct mmc_card *card) |
1da177e4 | 2912 | { |
371a689f | 2913 | struct mmc_blk_data *md, *part_md; |
a7bbb573 PO |
2914 | char cap_str[10]; |
2915 | ||
912490db PO |
2916 | /* |
2917 | * Check that the card supports the command class(es) we need. | |
2918 | */ | |
2919 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
2920 | return -ENODEV; |
2921 | ||
8c7cdbf9 | 2922 | mmc_fixup_device(card, mmc_blk_fixups); |
5204d00f | 2923 | |
dcf6e2e3 ZH |
2924 | card->complete_wq = alloc_workqueue("mmc_complete", |
2925 | WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); | |
2926 | if (unlikely(!card->complete_wq)) { | |
2927 | pr_err("Failed to create mmc completion workqueue"); | |
2928 | return -ENOMEM; | |
2929 | } | |
2930 | ||
1da177e4 | 2931 | md = mmc_blk_alloc(card); |
304419d8 | 2932 | if (IS_ERR(md)) |
1da177e4 LT |
2933 | return PTR_ERR(md); |
2934 | ||
b9f28d86 | 2935 | string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, |
a7bbb573 | 2936 | cap_str, sizeof(cap_str)); |
a3c76eb9 | 2937 | pr_info("%s: %s %s %s %s\n", |
1da177e4 | 2938 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 2939 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 2940 | |
371a689f AW |
2941 | if (mmc_blk_alloc_parts(card, md)) |
2942 | goto out; | |
2943 | ||
96541bac | 2944 | dev_set_drvdata(&card->dev, md); |
6f60c222 | 2945 | |
371a689f AW |
2946 | if (mmc_add_disk(md)) |
2947 | goto out; | |
2948 | ||
2949 | list_for_each_entry(part_md, &md->part, part) { | |
2950 | if (mmc_add_disk(part_md)) | |
2951 | goto out; | |
2952 | } | |
e94cfef6 | 2953 | |
627c3ccf | 2954 | /* Add two debugfs entries */ |
f9f0da98 | 2955 | mmc_blk_add_debugfs(card, md); |
627c3ccf | 2956 | |
e94cfef6 UH |
2957 | pm_runtime_set_autosuspend_delay(&card->dev, 3000); |
2958 | pm_runtime_use_autosuspend(&card->dev); | |
2959 | ||
2960 | /* | |
2961 | * Don't enable runtime PM for SD-combo cards here. Leave that | |
2962 | * decision to be taken during the SDIO init sequence instead. | |
2963 | */ | |
2964 | if (card->type != MMC_TYPE_SD_COMBO) { | |
2965 | pm_runtime_set_active(&card->dev); | |
2966 | pm_runtime_enable(&card->dev); | |
2967 | } | |
2968 | ||
1da177e4 LT |
2969 | return 0; |
2970 | ||
2971 | out: | |
371a689f AW |
2972 | mmc_blk_remove_parts(card, md); |
2973 | mmc_blk_remove_req(md); | |
5865f287 | 2974 | return 0; |
1da177e4 LT |
2975 | } |
2976 | ||
96541bac | 2977 | static void mmc_blk_remove(struct mmc_card *card) |
1da177e4 | 2978 | { |
96541bac | 2979 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 | 2980 | |
f9f0da98 | 2981 | mmc_blk_remove_debugfs(card, md); |
371a689f | 2982 | mmc_blk_remove_parts(card, md); |
e94cfef6 | 2983 | pm_runtime_get_sync(&card->dev); |
65f9e20e SL |
2984 | if (md->part_curr != md->part_type) { |
2985 | mmc_claim_host(card->host); | |
2986 | mmc_blk_part_switch(card, md->part_type); | |
2987 | mmc_release_host(card->host); | |
2988 | } | |
e94cfef6 UH |
2989 | if (card->type != MMC_TYPE_SD_COMBO) |
2990 | pm_runtime_disable(&card->dev); | |
2991 | pm_runtime_put_noidle(&card->dev); | |
371a689f | 2992 | mmc_blk_remove_req(md); |
96541bac | 2993 | dev_set_drvdata(&card->dev, NULL); |
dcf6e2e3 | 2994 | destroy_workqueue(card->complete_wq); |
1da177e4 LT |
2995 | } |
2996 | ||
96541bac | 2997 | static int _mmc_blk_suspend(struct mmc_card *card) |
1da177e4 | 2998 | { |
371a689f | 2999 | struct mmc_blk_data *part_md; |
96541bac | 3000 | struct mmc_blk_data *md = dev_get_drvdata(&card->dev); |
1da177e4 LT |
3001 | |
3002 | if (md) { | |
3003 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
3004 | list_for_each_entry(part_md, &md->part, part) { |
3005 | mmc_queue_suspend(&part_md->queue); | |
3006 | } | |
1da177e4 LT |
3007 | } |
3008 | return 0; | |
3009 | } | |
3010 | ||
96541bac | 3011 | static void mmc_blk_shutdown(struct mmc_card *card) |
76287748 | 3012 | { |
96541bac | 3013 | _mmc_blk_suspend(card); |
76287748 UH |
3014 | } |
3015 | ||
0967edc6 UH |
3016 | #ifdef CONFIG_PM_SLEEP |
3017 | static int mmc_blk_suspend(struct device *dev) | |
76287748 | 3018 | { |
96541bac UH |
3019 | struct mmc_card *card = mmc_dev_to_card(dev); |
3020 | ||
3021 | return _mmc_blk_suspend(card); | |
76287748 UH |
3022 | } |
3023 | ||
0967edc6 | 3024 | static int mmc_blk_resume(struct device *dev) |
1da177e4 | 3025 | { |
371a689f | 3026 | struct mmc_blk_data *part_md; |
fc95e30b | 3027 | struct mmc_blk_data *md = dev_get_drvdata(dev); |
1da177e4 LT |
3028 | |
3029 | if (md) { | |
371a689f AW |
3030 | /* |
3031 | * Resume involves the card going into idle state, | |
3032 | * so current partition is always the main one. | |
3033 | */ | |
3034 | md->part_curr = md->part_type; | |
1da177e4 | 3035 | mmc_queue_resume(&md->queue); |
371a689f AW |
3036 | list_for_each_entry(part_md, &md->part, part) { |
3037 | mmc_queue_resume(&part_md->queue); | |
3038 | } | |
1da177e4 LT |
3039 | } |
3040 | return 0; | |
3041 | } | |
1da177e4 LT |
3042 | #endif |
3043 | ||
0967edc6 UH |
3044 | static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume); |
3045 | ||
96541bac UH |
3046 | static struct mmc_driver mmc_driver = { |
3047 | .drv = { | |
3048 | .name = "mmcblk", | |
3049 | .pm = &mmc_blk_pm_ops, | |
3050 | }, | |
1da177e4 LT |
3051 | .probe = mmc_blk_probe, |
3052 | .remove = mmc_blk_remove, | |
76287748 | 3053 | .shutdown = mmc_blk_shutdown, |
1da177e4 LT |
3054 | }; |
3055 | ||
3056 | static int __init mmc_blk_init(void) | |
3057 | { | |
9d4e98e9 | 3058 | int res; |
1da177e4 | 3059 | |
97548575 LW |
3060 | res = bus_register(&mmc_rpmb_bus_type); |
3061 | if (res < 0) { | |
3062 | pr_err("mmcblk: could not register RPMB bus type\n"); | |
3063 | return res; | |
3064 | } | |
3065 | res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb"); | |
3066 | if (res < 0) { | |
3067 | pr_err("mmcblk: failed to allocate rpmb chrdev region\n"); | |
3068 | goto out_bus_unreg; | |
3069 | } | |
3070 | ||
5e71b7a6 OJ |
3071 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
3072 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
3073 | ||
a26eba61 | 3074 | max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors); |
5e71b7a6 | 3075 | |
fe6b4c88 PO |
3076 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
3077 | if (res) | |
97548575 | 3078 | goto out_chrdev_unreg; |
1da177e4 | 3079 | |
9d4e98e9 AM |
3080 | res = mmc_register_driver(&mmc_driver); |
3081 | if (res) | |
97548575 | 3082 | goto out_blkdev_unreg; |
1da177e4 | 3083 | |
9d4e98e9 | 3084 | return 0; |
97548575 LW |
3085 | |
3086 | out_blkdev_unreg: | |
9d4e98e9 | 3087 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 LW |
3088 | out_chrdev_unreg: |
3089 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); | |
3090 | out_bus_unreg: | |
3091 | bus_unregister(&mmc_rpmb_bus_type); | |
1da177e4 LT |
3092 | return res; |
3093 | } | |
3094 | ||
3095 | static void __exit mmc_blk_exit(void) | |
3096 | { | |
3097 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 3098 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
97548575 | 3099 | unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); |
d0a0852b | 3100 | bus_unregister(&mmc_rpmb_bus_type); |
1da177e4 LT |
3101 | } |
3102 | ||
3103 | module_init(mmc_blk_init); | |
3104 | module_exit(mmc_blk_exit); | |
3105 | ||
3106 | MODULE_LICENSE("GPL"); | |
3107 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
3108 |