diff options
Diffstat (limited to 'drivers/mmc/core/block.c')
| -rw-r--r-- | drivers/mmc/core/block.c | 547 |
1 files changed, 426 insertions, 121 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 00c33edb9fb9..fb6eb2d79b4f 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -33,6 +33,7 @@ #include <linux/cdev.h> #include <linux/mutex.h> #include <linux/scatterlist.h> +#include <linux/string.h> #include <linux/string_helpers.h> #include <linux/delay.h> #include <linux/capability.h> @@ -40,6 +41,7 @@ #include <linux/pm_runtime.h> #include <linux/idr.h> #include <linux/debugfs.h> +#include <linux/rpmb.h> #include <linux/mmc/ioctl.h> #include <linux/mmc/card.h> @@ -48,6 +50,7 @@ #include <linux/mmc/sd.h> #include <linux/uaccess.h> +#include <linux/unaligned.h> #include "queue.h" #include "block.h" @@ -76,6 +79,10 @@ MODULE_ALIAS("mmc:block"); #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) #define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8) +#define RPMB_FRAME_SIZE sizeof(struct rpmb_frame) +#define CHECK_SIZE_NEQ(val) ((val) != sizeof(struct rpmb_frame)) +#define CHECK_SIZE_ALIGNED(val) IS_ALIGNED((val), sizeof(struct rpmb_frame)) + static DEFINE_MUTEX(block_mutex); /* @@ -144,7 +151,7 @@ struct mmc_blk_data { static dev_t mmc_rpmb_devt; /* Bus type for RPMB character devices */ -static struct bus_type mmc_rpmb_bus_type = { +static const struct bus_type mmc_rpmb_bus_type = { .name = "mmc_rpmb", }; @@ -155,6 +162,7 @@ static struct bus_type mmc_rpmb_bus_type = { * @id: unique device ID number * @part_index: partition index (0 on first) * @md: parent MMC block device + * @rdev: registered RPMB device * @node: list item, so we can put this device on a list */ struct mmc_rpmb_data { @@ -163,6 +171,7 @@ struct mmc_rpmb_data { int id; unsigned int part_index; struct mmc_blk_data *md; + struct rpmb_dev *rdev; struct list_head node; }; @@ -178,6 +187,8 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, int recovery_mode, struct mmc_queue *mq); static void mmc_blk_hsq_req_done(struct mmc_request *mrq); +static int mmc_spi_err_check(struct mmc_card *card); +static int mmc_blk_busy_cb(void *cb_data, bool *busy); static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) { @@ -204,7 +215,7 @@ static void mmc_blk_kref_release(struct kref *ref) int devidx; devidx = mmc_get_devidx(md->disk); - ida_simple_remove(&mmc_blk_ida, devidx); + ida_free(&mmc_blk_ida, devidx); mutex_lock(&open_lock); md->disk->private_data = NULL; @@ -232,7 +243,7 @@ static ssize_t power_ro_lock_show(struct device *dev, else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN) locked = 1; - ret = snprintf(buf, PAGE_SIZE, "%d\n", locked); + ret = sysfs_emit(buf, "%d\n", locked); mmc_blk_put(md); @@ -264,6 +275,7 @@ static ssize_t power_ro_lock_store(struct device *dev, goto out_put; } req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP; + req_to_mmc_queue_req(req)->drv_op_result = -EIO; blk_execute_rq(req, false); ret = req_to_mmc_queue_req(req)->drv_op_result; blk_mq_free_request(req); @@ -293,9 +305,9 @@ static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, int ret; struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); - ret = snprintf(buf, PAGE_SIZE, "%d\n", - get_disk_ro(dev_to_disk(dev)) ^ - md->read_only); + ret = sysfs_emit(buf, "%d\n", + get_disk_ro(dev_to_disk(dev)) ^ + md->read_only); mmc_blk_put(md); return ret; } @@ -304,10 +316,10 @@ static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret; - char *end; struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); - unsigned long set = simple_strtoul(buf, &end, 0); - if (end == buf) { + unsigned long set; + + if (kstrtoul(buf, 0, &set)) { ret = -EINVAL; goto out; } @@ -337,10 +349,10 @@ static umode_t mmc_disk_attrs_is_visible(struct kobject *kobj, if (a == &dev_attr_ro_lock_until_next_power_on.attr && (md->area_type & MMC_BLK_DATA_AREA_BOOT) && md->queue.card->ext_csd.boot_ro_lockable) { - mode = S_IRUGO; + mode = 0444; if (!(md->queue.card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)) - mode |= S_IWUSR; + mode |= 0200; } mmc_blk_put(md); @@ -357,15 +369,15 @@ static const struct attribute_group *mmc_disk_attr_groups[] = { NULL, }; -static int mmc_blk_open(struct block_device *bdev, fmode_t mode) +static int mmc_blk_open(struct gendisk *disk, blk_mode_t mode) { - struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); + struct mmc_blk_data *md = mmc_blk_get(disk); int ret = -ENXIO; mutex_lock(&block_mutex); if (md) { ret = 0; - if ((mode & FMODE_WRITE) && md->read_only) { + if ((mode & BLK_OPEN_WRITE) && md->read_only) { mmc_blk_put(md); ret = -EROFS; } @@ -375,7 +387,7 @@ static int mmc_blk_open(struct block_device *bdev, fmode_t mode) return ret; } -static void mmc_blk_release(struct gendisk *disk, fmode_t mode) +static void mmc_blk_release(struct gendisk *disk) { struct mmc_blk_data *md = disk->private_data; @@ -385,9 +397,9 @@ static void mmc_blk_release(struct gendisk *disk, fmode_t mode) } static int -mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) +mmc_blk_getgeo(struct gendisk *disk, struct hd_geometry *geo) { - geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); + geo->cylinders = get_capacity(disk) / (4 * 16); geo->heads = 4; geo->sectors = 16; return 0; @@ -397,6 +409,10 @@ struct mmc_blk_ioc_data { struct mmc_ioc_cmd ic; unsigned char *buf; u64 buf_bytes; + unsigned int flags; +#define MMC_BLK_IOC_DROP BIT(0) /* drop this mrq */ +#define MMC_BLK_IOC_SBC BIT(1) /* use mrq.sbc */ + struct mmc_rpmb_data *rpmb; }; @@ -406,7 +422,7 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( struct mmc_blk_ioc_data *idata; int err; - idata = kmalloc(sizeof(*idata), GFP_KERNEL); + idata = kzalloc(sizeof(*idata), GFP_KERNEL); if (!idata) { err = -ENOMEM; goto out; @@ -462,20 +478,28 @@ static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr, } static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, - struct mmc_blk_ioc_data *idata) + struct mmc_blk_ioc_data **idatas, int i) { struct mmc_command cmd = {}, sbc = {}; struct mmc_data data = {}; struct mmc_request mrq = {}; struct scatterlist sg; - bool r1b_resp, use_r1b_resp = false; + bool r1b_resp; unsigned int busy_timeout_ms; int err; unsigned int target_part; + struct mmc_blk_ioc_data *idata = idatas[i]; + struct mmc_blk_ioc_data *prev_idata = NULL; if (!card || !md || !idata) return -EINVAL; + if (idata->flags & MMC_BLK_IOC_DROP) + return 0; + + if (idata->flags & MMC_BLK_IOC_SBC && i > 0) + prev_idata = idatas[i - 1]; + /* * The RPMB accesses comes in from the character device, so we * need to target these explicitly. Else we just target the @@ -529,7 +553,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, return err; } - if (idata->rpmb) { + if (idata->rpmb || prev_idata) { sbc.opcode = MMC_SET_BLOCK_COUNT; /* * We don't do any blockcount validation because the max size @@ -537,6 +561,8 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, * 'Reliable Write' bit here. */ sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31)); + if (prev_idata) + sbc.arg = prev_idata->ic.arg; sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; mrq.sbc = &sbc; } @@ -549,12 +575,20 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, busy_timeout_ms = idata->ic.cmd_timeout_ms ? : MMC_BLK_TIMEOUT_MS; r1b_resp = (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B; if (r1b_resp) - use_r1b_resp = mmc_prepare_busy_cmd(card->host, &cmd, - busy_timeout_ms); + mmc_prepare_busy_cmd(card->host, &cmd, busy_timeout_ms); mmc_wait_for_req(card->host, &mrq); memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp)); + if (prev_idata) { + memcpy(&prev_idata->ic.response, sbc.resp, sizeof(sbc.resp)); + if (sbc.error) { + dev_err(mmc_dev(card->host), "%s: sbc error %d\n", + __func__, sbc.error); + return sbc.error; + } + } + if (cmd.error) { dev_err(mmc_dev(card->host), "%s: cmd error %d\n", __func__, cmd.error); @@ -603,14 +637,28 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, if (idata->ic.postsleep_min_us) usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); - /* No need to poll when using HW busy detection. */ - if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) - return 0; + if (mmc_host_is_spi(card->host)) { + if (idata->ic.write_flag || r1b_resp || cmd.flags & MMC_RSP_SPI_BUSY) + return mmc_spi_err_check(card); + return err; + } - /* Ensure RPMB/R1B command has completed by polling with CMD13. */ - if (idata->rpmb || r1b_resp) - err = mmc_poll_for_busy(card, busy_timeout_ms, false, - MMC_BUSY_IO); + /* + * Ensure RPMB, writes and R1B responses are completed by polling with + * CMD13. Note that, usually we don't need to poll when using HW busy + * detection, but here it's needed since some commands may indicate the + * error through the R1 status bits. + */ + if (idata->rpmb || idata->ic.write_flag || r1b_resp) { + struct mmc_blk_busy_data cb_data = { + .card = card, + }; + + err = __mmc_poll_for_busy(card->host, 0, busy_timeout_ms, + &mmc_blk_busy_cb, &cb_data); + + idata->ic.response[0] = cb_data.status; + } return err; } @@ -651,6 +699,7 @@ static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md, idatas[0] = idata; req_to_mmc_queue_req(req)->drv_op = rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; + req_to_mmc_queue_req(req)->drv_op_result = -EIO; req_to_mmc_queue_req(req)->drv_op_data = idatas; req_to_mmc_queue_req(req)->ioc_count = 1; blk_execute_rq(req, false); @@ -722,6 +771,7 @@ static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md, } req_to_mmc_queue_req(req)->drv_op = rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL; + req_to_mmc_queue_req(req)->drv_op_result = -EIO; req_to_mmc_queue_req(req)->drv_op_data = idata; req_to_mmc_queue_req(req)->ioc_count = n; blk_execute_rq(req, false); @@ -754,7 +804,7 @@ static int mmc_blk_check_blkdev(struct block_device *bdev) return 0; } -static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, +static int mmc_blk_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg) { struct mmc_blk_data *md; @@ -791,7 +841,7 @@ static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, } #ifdef CONFIG_COMPAT -static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, +static int mmc_blk_compat_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg) { return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); @@ -833,9 +883,11 @@ static const struct block_device_operations mmc_bdops = { static int mmc_blk_part_switch_pre(struct mmc_card *card, unsigned int part_type) { + const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK; + const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB; int ret = 0; - if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { + if ((part_type & mask) == rpmb) { if (card->ext_csd.cmdq_en) { ret = mmc_cmdq_disable(card); if (ret) @@ -850,9 +902,11 @@ static int mmc_blk_part_switch_pre(struct mmc_card *card, static int mmc_blk_part_switch_post(struct mmc_card *card, unsigned int part_type) { + const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK; + const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB; int ret = 0; - if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { + if ((part_type & mask) == rpmb) { mmc_retune_unpause(card->host); if (card->reenable_cmdq && !card->ext_csd.cmdq_en) ret = mmc_cmdq_enable(card); @@ -902,30 +956,22 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) int err; u32 result; __be32 *blocks; + u8 resp_sz = mmc_card_ult_capacity(card) ? 8 : 4; struct mmc_request mrq = {}; struct mmc_command cmd = {}; struct mmc_data data = {}; - struct scatterlist sg; - cmd.opcode = MMC_APP_CMD; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(card->host, &cmd, 0); + err = mmc_app_cmd(card->host, card); if (err) return err; - if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) - return -EIO; - - memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; cmd.arg = 0; cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; - data.blksz = 4; + data.blksz = resp_sz; data.blocks = 1; data.flags = MMC_DATA_READ; data.sg = &sg; @@ -935,15 +981,27 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) mrq.cmd = &cmd; mrq.data = &data; - blocks = kmalloc(4, GFP_KERNEL); + blocks = kmalloc(resp_sz, GFP_NOIO); if (!blocks) return -ENOMEM; - sg_init_one(&sg, blocks, 4); + sg_init_one(&sg, blocks, resp_sz); mmc_wait_for_req(card->host, &mrq); - result = ntohl(*blocks); + if (mmc_card_ult_capacity(card)) { + /* + * Normally, ACMD22 returns the number of written sectors as + * u32. SDUC, however, returns it as u64. This is not a + * superfluous requirement, because SDUC writes may exceed 2TB. + * For Linux mmc however, the previously write operation could + * not be more than the block layer limits, thus just make room + * for a u64 and cast the response back to u32. + */ + result = clamp_val(get_unaligned_be64(blocks), 0, UINT_MAX); + } else { + result = ntohl(*blocks); + } kfree(blocks); if (cmd.error || data.error) @@ -1022,6 +1080,20 @@ static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) md->reset_done &= ~type; } +static void mmc_blk_check_sbc(struct mmc_queue_req *mq_rq) +{ + struct mmc_blk_ioc_data **idata = mq_rq->drv_op_data; + int i; + + for (i = 1; i < mq_rq->ioc_count; i++) { + if (idata[i - 1]->ic.opcode == MMC_SET_BLOCK_COUNT && + mmc_op_multi(idata[i]->ic.opcode)) { + idata[i - 1]->flags |= MMC_BLK_IOC_DROP; + idata[i]->flags |= MMC_BLK_IOC_SBC; + } + } +} + /* * The non-block commands come back from the block layer after it queued it and * processed it with all other requests and then they get issued in this @@ -1049,11 +1121,14 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) if (ret) break; } + + mmc_blk_check_sbc(mq_rq); + fallthrough; case MMC_DRV_OP_IOCTL_RPMB: idata = mq_rq->drv_op_data; for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) { - ret = __mmc_blk_ioctl_cmd(card, md, idata[i]); + ret = __mmc_blk_ioctl_cmd(card, md, idata, i); if (ret) break; } @@ -1099,11 +1174,12 @@ static void mmc_blk_issue_erase_rq(struct mmc_queue *mq, struct request *req, { struct mmc_blk_data *md = mq->blkdata; struct mmc_card *card = md->queue.card; - unsigned int from, nr; + unsigned int nr; + sector_t from; int err = 0; blk_status_t status = BLK_STS_OK; - if (!mmc_can_erase(card)) { + if (!mmc_card_can_erase(card)) { status = BLK_STS_NOTSUPP; goto fail; } @@ -1154,11 +1230,12 @@ static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, { struct mmc_blk_data *md = mq->blkdata; struct mmc_card *card = md->queue.card; - unsigned int from, nr, arg; + unsigned int nr, arg; + sector_t from; int err = 0, type = MMC_BLK_SECDISCARD; blk_status_t status = BLK_STS_OK; - if (!(mmc_can_secure_erase_trim(card))) { + if (!(mmc_card_can_secure_erase_trim(card))) { status = BLK_STS_NOTSUPP; goto out; } @@ -1166,7 +1243,7 @@ static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, from = blk_rq_pos(req); nr = blk_rq_sectors(req); - if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) + if (mmc_card_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) arg = MMC_SECURE_TRIM1_ARG; else arg = MMC_SECURE_ERASE_ARG; @@ -1472,6 +1549,8 @@ static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) blk_mq_requeue_request(req, true); else __blk_mq_end_request(req, BLK_STS_OK); + } else if (mq->in_recovery) { + blk_mq_requeue_request(req, true); } else { blk_mq_end_request(req, BLK_STS_OK); } @@ -1648,8 +1727,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, * these, while retaining features like reliable writes. */ if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) && - (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) || - do_data_tag)) { + (do_rel_wr || !mmc_card_blk_no_cmd23(card) || do_data_tag)) { brq->sbc.opcode = MMC_SET_BLOCK_COUNT; brq->sbc.arg = brq->data.blocks | (do_rel_wr ? (1 << 31) : 0) | @@ -1657,6 +1735,11 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; brq->mrq.sbc = &brq->sbc; } + + if (mmc_card_ult_capacity(card)) { + brq->cmd.ext_addr = blk_rq_pos(req) >> 32; + brq->cmd.has_ext_addr = true; + } } #define MMC_MAX_RETRIES 5 @@ -2088,14 +2171,14 @@ static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, mmc_blk_urgent_bkops(mq, mqrq); } -static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) +static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, enum mmc_issue_type issue_type) { unsigned long flags; bool put_card; spin_lock_irqsave(&mq->lock, flags); - mq->in_flight[mmc_issue_type(mq, req)] -= 1; + mq->in_flight[issue_type] -= 1; put_card = (mmc_tot_in_flight(mq) == 0); @@ -2108,6 +2191,7 @@ static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req, bool can_sleep) { + enum mmc_issue_type issue_type = mmc_issue_type(mq, req); struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); struct mmc_request *mrq = &mqrq->brq.mrq; struct mmc_host *host = mq->card->host; @@ -2127,7 +2211,7 @@ static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req, blk_mq_complete_request(req); } - mmc_blk_mq_dec_in_flight(mq, req); + mmc_blk_mq_dec_in_flight(mq, issue_type); } void mmc_blk_mq_recovery(struct mmc_queue *mq) @@ -2152,7 +2236,7 @@ void mmc_blk_mq_recovery(struct mmc_queue *mq) static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, struct request **prev_req) { - if (mmc_host_done_complete(mq->card->host)) + if (mmc_host_can_done_complete(mq->card->host)) return; mutex_lock(&mq->complete_lock); @@ -2191,7 +2275,7 @@ static void mmc_blk_mq_req_done(struct mmc_request *mrq) struct mmc_host *host = mq->card->host; unsigned long flags; - if (!mmc_host_done_complete(host)) { + if (!mmc_host_can_done_complete(host)) { bool waiting; /* @@ -2304,7 +2388,7 @@ static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, mq->rw_wait = false; /* Release re-tuning here where there is no synchronization required */ - if (err || mmc_host_done_complete(host)) + if (err || mmc_host_can_done_complete(host)) mmc_retune_release(host); out_post_req: @@ -2370,8 +2454,10 @@ enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) } ret = mmc_blk_cqe_issue_flush(mq, req); break; - case REQ_OP_READ: case REQ_OP_WRITE: + card->written_flag = true; + fallthrough; + case REQ_OP_READ: if (host->cqe_enabled) ret = mmc_blk_cqe_issue_rw_rq(mq, req); else @@ -2396,6 +2482,56 @@ static inline int mmc_blk_readonly(struct mmc_card *card) !(card->csd.cmdclass & CCC_BLOCK_WRITE); } +/* + * Search for a declared partitions node for the disk in mmc-card related node. + * + * This is to permit support for partition table defined in DT in special case + * where a partition table is not written in the disk and is expected to be + * passed from the running system. + * + * For the user disk, "partitions" node is searched. + * For the special HW disk, "partitions-" node with the appended name is used + * following this conversion table (to adhere to JEDEC naming) + * - boot0 -> partitions-boot1 + * - boot1 -> partitions-boot2 + * - gp0 -> partitions-gp1 + * - gp1 -> partitions-gp2 + * - gp2 -> partitions-gp3 + * - gp3 -> partitions-gp4 + */ +static struct fwnode_handle *mmc_blk_get_partitions_node(struct device *mmc_dev, + const char *subname) +{ + const char *node_name = "partitions"; + + if (subname) { + mmc_dev = mmc_dev->parent; + + /* + * Check if we are allocating a BOOT disk boot0/1 disk. + * In DT we use the JEDEC naming boot1/2. + */ + if (!strcmp(subname, "boot0")) + node_name = "partitions-boot1"; + if (!strcmp(subname, "boot1")) + node_name = "partitions-boot2"; + /* + * Check if we are allocating a GP disk gp0/1/2/3 disk. + * In DT we use the JEDEC naming gp1/2/3/4. + */ + if (!strcmp(subname, "gp0")) + node_name = "partitions-gp1"; + if (!strcmp(subname, "gp1")) + node_name = "partitions-gp2"; + if (!strcmp(subname, "gp2")) + node_name = "partitions-gp3"; + if (!strcmp(subname, "gp3")) + node_name = "partitions-gp4"; + } + + return device_get_named_child_node(mmc_dev, node_name); +} + static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, struct device *parent, sector_t size, @@ -2404,13 +2540,13 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, int area_type, unsigned int part_type) { + struct fwnode_handle *disk_fwnode; struct mmc_blk_data *md; int devidx, ret; char cap_str[10]; - bool cache_enabled = false; - bool fua_enabled = false; + unsigned int features = 0; - devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL); + devidx = ida_alloc_max(&mmc_blk_ida, max_devices - 1, GFP_KERNEL); if (devidx < 0) { /* * We get -ENOSPC because there are no more any available @@ -2426,7 +2562,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, return ERR_PTR(devidx); } - md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); + md = kzalloc(sizeof(*md), GFP_KERNEL); if (!md) { ret = -ENOMEM; goto out; @@ -2440,7 +2576,19 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, */ md->read_only = mmc_blk_readonly(card); - md->disk = mmc_init_queue(&md->queue, card); + if (mmc_host_can_cmd23(card->host) && mmc_card_can_cmd23(card)) + md->flags |= MMC_BLK_CMD23; + + if (md->flags & MMC_BLK_CMD23 && + ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || + card->ext_csd.rel_sectors)) { + md->flags |= MMC_BLK_REL_WR; + features |= (BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA); + } else if (mmc_cache_enabled(card->host)) { + features |= BLK_FEAT_WRITE_CACHE; + } + + md->disk = mmc_init_queue(&md->queue, card, features); if (IS_ERR(md->disk)) { ret = PTR_ERR(md->disk); goto err_kfree; @@ -2460,7 +2608,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, md->disk->private_data = md; md->parent = parent; set_disk_ro(md->disk, md->read_only || default_ro); - if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT)) + if (area_type & MMC_BLK_DATA_AREA_RPMB) md->disk->flags |= GENHD_FL_NO_PART; /* @@ -2480,36 +2628,18 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, set_capacity(md->disk, size); - if (mmc_host_cmd23(card->host)) { - if ((mmc_card_mmc(card) && - card->csd.mmca_vsn >= CSD_SPEC_VER_3) || - (mmc_card_sd(card) && - card->scr.cmds & SD_SCR_CMD23_SUPPORT)) - md->flags |= MMC_BLK_CMD23; - } - - if (md->flags & MMC_BLK_CMD23 && - ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || - card->ext_csd.rel_sectors)) { - md->flags |= MMC_BLK_REL_WR; - fua_enabled = true; - cache_enabled = true; - } - if (mmc_cache_enabled(card->host)) - cache_enabled = true; - - blk_queue_write_cache(md->queue.queue, cache_enabled, fua_enabled); - string_get_size((u64)size, 512, STRING_UNITS_2, cap_str, sizeof(cap_str)); - pr_info("%s: %s %s %s %s\n", + pr_info("%s: %s %s %s%s\n", md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), - cap_str, md->read_only ? "(ro)" : ""); + cap_str, md->read_only ? " (ro)" : ""); /* used in ->open, must be set before add_disk: */ if (area_type == MMC_BLK_DATA_AREA_MAIN) dev_set_drvdata(&card->dev, md); - ret = device_add_disk(md->parent, md->disk, mmc_disk_attr_groups); + disk_fwnode = mmc_blk_get_partitions_node(parent, subname); + ret = add_disk_fwnode(md->parent, md->disk, mmc_disk_attr_groups, + disk_fwnode); if (ret) goto err_put_disk; return md; @@ -2520,7 +2650,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, err_kfree: kfree(md); out: - ida_simple_remove(&mmc_blk_ida, devidx); + ida_free(&mmc_blk_ida, devidx); return ERR_PTR(ret); } @@ -2615,7 +2745,6 @@ static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp) get_device(&rpmb->dev); filp->private_data = rpmb; - mmc_blk_get(rpmb->md->disk); return nonseekable_open(inode, filp); } @@ -2625,7 +2754,6 @@ static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp) struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev, struct mmc_rpmb_data, chrdev); - mmc_blk_put(rpmb->md); put_device(&rpmb->dev); return 0; @@ -2635,7 +2763,6 @@ static const struct file_operations mmc_rpmb_fileops = { .release = mmc_rpmb_chrdev_release, .open = mmc_rpmb_chrdev_open, .owner = THIS_MODULE, - .llseek = no_llseek, .unlocked_ioctl = mmc_rpmb_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = mmc_rpmb_ioctl_compat, @@ -2646,10 +2773,159 @@ static void mmc_blk_rpmb_device_release(struct device *dev) { struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); - ida_simple_remove(&mmc_rpmb_ida, rpmb->id); + rpmb_dev_unregister(rpmb->rdev); + mmc_blk_put(rpmb->md); + ida_free(&mmc_rpmb_ida, rpmb->id); kfree(rpmb); } +static void free_idata(struct mmc_blk_ioc_data **idata, unsigned int cmd_count) +{ + unsigned int n; + + for (n = 0; n < cmd_count; n++) + kfree(idata[n]); + kfree(idata); +} + +static struct mmc_blk_ioc_data **alloc_idata(struct mmc_rpmb_data *rpmb, + unsigned int cmd_count) +{ + struct mmc_blk_ioc_data **idata; + unsigned int n; + + idata = kcalloc(cmd_count, sizeof(*idata), GFP_KERNEL); + if (!idata) + return NULL; + + for (n = 0; n < cmd_count; n++) { + idata[n] = kcalloc(1, sizeof(**idata), GFP_KERNEL); + if (!idata[n]) { + free_idata(idata, n); + return NULL; + } + idata[n]->rpmb = rpmb; + } + + return idata; +} + +static void set_idata(struct mmc_blk_ioc_data *idata, u32 opcode, + int write_flag, u8 *buf, unsigned int buf_bytes) +{ + /* + * The size of an RPMB frame must match what's expected by the + * hardware. + */ + static_assert(!CHECK_SIZE_NEQ(512), "RPMB frame size must be 512 bytes"); + + idata->ic.opcode = opcode; + idata->ic.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + idata->ic.write_flag = write_flag; + idata->ic.blksz = RPMB_FRAME_SIZE; + idata->ic.blocks = buf_bytes / idata->ic.blksz; + idata->buf = buf; + idata->buf_bytes = buf_bytes; +} + +static int mmc_route_rpmb_frames(struct device *dev, u8 *req, + unsigned int req_len, u8 *resp, + unsigned int resp_len) +{ + struct rpmb_frame *frm = (struct rpmb_frame *)req; + struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev); + struct mmc_blk_data *md = rpmb->md; + struct mmc_blk_ioc_data **idata; + struct mmc_queue_req *mq_rq; + unsigned int cmd_count; + struct request *rq; + u16 req_type; + bool write; + int ret; + + if (IS_ERR(md->queue.card)) + return PTR_ERR(md->queue.card); + + if (req_len < RPMB_FRAME_SIZE) + return -EINVAL; + + req_type = be16_to_cpu(frm->req_resp); + switch (req_type) { + case RPMB_PROGRAM_KEY: + if (CHECK_SIZE_NEQ(req_len) || CHECK_SIZE_NEQ(resp_len)) + return -EINVAL; + write = true; + break; + case RPMB_GET_WRITE_COUNTER: + if (CHECK_SIZE_NEQ(req_len) || CHECK_SIZE_NEQ(resp_len)) + return -EINVAL; + write = false; + break; + case RPMB_WRITE_DATA: + if (!CHECK_SIZE_ALIGNED(req_len) || CHECK_SIZE_NEQ(resp_len)) + return -EINVAL; + write = true; + break; + case RPMB_READ_DATA: + if (CHECK_SIZE_NEQ(req_len) || !CHECK_SIZE_ALIGNED(resp_len)) + return -EINVAL; + write = false; + break; + default: + return -EINVAL; + } + + /* Write operations require 3 commands, read operations require 2 */ + cmd_count = write ? 3 : 2; + + idata = alloc_idata(rpmb, cmd_count); + if (!idata) + return -ENOMEM; + + if (write) { + struct rpmb_frame *resp_frm = (struct rpmb_frame *)resp; + + /* Send write request frame(s) */ + set_idata(idata[0], MMC_WRITE_MULTIPLE_BLOCK, + 1 | MMC_CMD23_ARG_REL_WR, req, req_len); + + /* Send result request frame */ + memset(resp_frm, 0, RPMB_FRAME_SIZE); + resp_frm->req_resp = cpu_to_be16(RPMB_RESULT_READ); + set_idata(idata[1], MMC_WRITE_MULTIPLE_BLOCK, 1, resp, + resp_len); + + /* Read response frame */ + set_idata(idata[2], MMC_READ_MULTIPLE_BLOCK, 0, resp, resp_len); + } else { + /* Send write request frame(s) */ + set_idata(idata[0], MMC_WRITE_MULTIPLE_BLOCK, 1, req, req_len); + + /* Read response frame */ + set_idata(idata[1], MMC_READ_MULTIPLE_BLOCK, 0, resp, resp_len); + } + + rq = blk_mq_alloc_request(md->queue.queue, REQ_OP_DRV_OUT, 0); + if (IS_ERR(rq)) { + ret = PTR_ERR(rq); + goto out; + } + + mq_rq = req_to_mmc_queue_req(rq); + mq_rq->drv_op = MMC_DRV_OP_IOCTL_RPMB; + mq_rq->drv_op_result = -EIO; + mq_rq->drv_op_data = idata; + mq_rq->ioc_count = cmd_count; + blk_execute_rq(rq, false); + ret = req_to_mmc_queue_req(rq)->drv_op_result; + + blk_mq_free_request(rq); + +out: + free_idata(idata, cmd_count); + return ret; +} + static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, struct mmc_blk_data *md, unsigned int part_index, @@ -2662,13 +2938,13 @@ static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, struct mmc_rpmb_data *rpmb; /* This creates the minor number for the RPMB char device */ - devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL); + devidx = ida_alloc_max(&mmc_rpmb_ida, max_devices - 1, GFP_KERNEL); if (devidx < 0) return devidx; rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL); if (!rpmb) { - ida_simple_remove(&mmc_rpmb_ida, devidx); + ida_free(&mmc_rpmb_ida, devidx); return -ENOMEM; } @@ -2684,6 +2960,7 @@ static int mmc_blk_alloc_rpmb_part(struct mmc_card *card, rpmb->dev.release = mmc_blk_rpmb_device_release; device_initialize(&rpmb->dev); dev_set_drvdata(&rpmb->dev, rpmb); + mmc_blk_get(md->disk); rpmb->md = md; cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops); @@ -2806,6 +3083,7 @@ static int mmc_dbg_card_status_get(void *data, u64 *val) if (IS_ERR(req)) return PTR_ERR(req); req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS; + req_to_mmc_queue_req(req)->drv_op_result = -EIO; blk_execute_rq(req, false); ret = req_to_mmc_queue_req(req)->drv_op_result; if (ret >= 0) { @@ -2844,6 +3122,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp) goto out_free; } req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD; + req_to_mmc_queue_req(req)->drv_op_result = -EIO; req_to_mmc_queue_req(req)->drv_op_data = &ext_csd; blk_execute_rq(req, false); err = req_to_mmc_queue_req(req)->drv_op_result; @@ -2894,12 +3173,12 @@ static const struct file_operations mmc_dbg_ext_csd_fops = { .llseek = default_llseek, }; -static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) +static void mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) { struct dentry *root; if (!card->debugfs_root) - return 0; + return; root = card->debugfs_root; @@ -2908,19 +3187,13 @@ static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) debugfs_create_file_unsafe("status", 0400, root, card, &mmc_dbg_card_status_fops); - if (!md->status_dentry) - return -EIO; } if (mmc_card_mmc(card)) { md->ext_csd_dentry = - debugfs_create_file("ext_csd", S_IRUSR, root, card, + debugfs_create_file("ext_csd", 0400, root, card, &mmc_dbg_ext_csd_fops); - if (!md->ext_csd_dentry) - return -EIO; } - - return 0; } static void mmc_blk_remove_debugfs(struct mmc_card *card, @@ -2929,22 +3202,17 @@ static void mmc_blk_remove_debugfs(struct mmc_card *card, if (!card->debugfs_root) return; - if (!IS_ERR_OR_NULL(md->status_dentry)) { - debugfs_remove(md->status_dentry); - md->status_dentry = NULL; - } + debugfs_remove(md->status_dentry); + md->status_dentry = NULL; - if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) { - debugfs_remove(md->ext_csd_dentry); - md->ext_csd_dentry = NULL; - } + debugfs_remove(md->ext_csd_dentry); + md->ext_csd_dentry = NULL; } #else -static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) +static void mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md) { - return 0; } static void mmc_blk_remove_debugfs(struct mmc_card *card, @@ -2954,6 +3222,42 @@ static void mmc_blk_remove_debugfs(struct mmc_card *card, #endif /* CONFIG_DEBUG_FS */ +static void mmc_blk_rpmb_add(struct mmc_card *card) +{ + struct mmc_blk_data *md = dev_get_drvdata(&card->dev); + struct mmc_rpmb_data *rpmb; + struct rpmb_dev *rdev; + unsigned int n; + u32 cid[4]; + struct rpmb_descr descr = { + .type = RPMB_TYPE_EMMC, + .route_frames = mmc_route_rpmb_frames, + .reliable_wr_count = card->ext_csd.enhanced_rpmb_supported ? + 2 : 32, + .capacity = card->ext_csd.raw_rpmb_size_mult, + .dev_id = (void *)cid, + .dev_id_len = sizeof(cid), + }; + + /* + * Provice CID as an octet array. The CID needs to be interpreted + * when used as input to derive the RPMB key since some fields + * will change due to firmware updates. + */ + for (n = 0; n < 4; n++) + cid[n] = be32_to_cpu((__force __be32)card->raw_cid[n]); + + list_for_each_entry(rpmb, &md->rpmbs, node) { + rdev = rpmb_dev_register(&rpmb->dev, &descr); + if (IS_ERR(rdev)) { + pr_warn("%s: could not register RPMB device\n", + dev_name(&rpmb->dev)); + continue; + } + rpmb->rdev = rdev; + } +} + static int mmc_blk_probe(struct mmc_card *card) { struct mmc_blk_data *md; @@ -2968,7 +3272,8 @@ static int mmc_blk_probe(struct mmc_card *card) mmc_fixup_device(card, mmc_blk_fixups); card->complete_wq = alloc_workqueue("mmc_complete", - WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); + WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_PERCPU, + 0); if (!card->complete_wq) { pr_err("Failed to create mmc completion workqueue"); return -ENOMEM; @@ -2999,6 +3304,8 @@ static int mmc_blk_probe(struct mmc_card *card) pm_runtime_enable(&card->dev); } + mmc_blk_rpmb_add(card); + return 0; out: @@ -3025,7 +3332,6 @@ static void mmc_blk_remove(struct mmc_card *card) pm_runtime_disable(&card->dev); pm_runtime_put_noidle(&card->dev); mmc_blk_remove_req(md); - dev_set_drvdata(&card->dev, NULL); destroy_workqueue(card->complete_wq); } @@ -3140,4 +3446,3 @@ module_exit(mmc_blk_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); - |
