diff options
Diffstat (limited to 'drivers/mmc/card/block.c')
| -rw-r--r-- | drivers/mmc/card/block.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 172a768036d..21056b9ef0a 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -57,6 +57,7 @@ MODULE_ALIAS("mmc:block"); #define INAND_CMD38_ARG_SECERASE 0x80 #define INAND_CMD38_ARG_SECTRIM1 0x81 #define INAND_CMD38_ARG_SECTRIM2 0x88 +#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ static DEFINE_MUTEX(block_mutex); @@ -126,6 +127,10 @@ enum mmc_blk_status { module_param(perdev_minors, int, 0444); MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); +static inline int mmc_blk_part_switch(struct mmc_card *card, + struct mmc_blk_data *md); +static int get_card_status(struct mmc_card *card, u32 *status, int retries); + static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) { struct mmc_blk_data *md; @@ -357,6 +362,38 @@ out: return ERR_PTR(err); } +static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status, + u32 retries_max) +{ + int err; + u32 retry_count = 0; + + if (!status || !retries_max) + return -EINVAL; + + do { + err = get_card_status(card, status, 5); + if (err) + break; + + if (!R1_STATUS(*status) && + (R1_CURRENT_STATE(*status) != R1_STATE_PRG)) + break; /* RPMB programming operation complete */ + + /* + * Rechedule to give the MMC device a chance to continue + * processing the previous command without being polled too + * frequently. + */ + usleep_range(1000, 5000); + } while (++retry_count < retries_max); + + if (retry_count == retries_max) + err = -EPERM; + + return err; +} + static int mmc_blk_ioctl_cmd(struct block_device *bdev, struct mmc_ioc_cmd __user *ic_ptr) { @@ -368,6 +405,8 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev, struct mmc_request mrq = {NULL}; struct scatterlist sg; int err; + int is_rpmb = false; + u32 status = 0; /* * The caller must have CAP_SYS_RAWIO, and must be calling this on the @@ -387,6 +426,9 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev, goto cmd_err; } + if (md->area_type & MMC_BLK_DATA_AREA_RPMB) + is_rpmb = true; + card = md->queue.card; if (IS_ERR(card)) { err = PTR_ERR(card); @@ -437,12 +479,23 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev, mmc_claim_host(card->host); + err = mmc_blk_part_switch(card, md); + if (err) + goto cmd_rel_host; + if (idata->ic.is_acmd) { err = mmc_app_cmd(card->host, card); if (err) goto cmd_rel_host; } + if (is_rpmb) { + err = mmc_set_blockcount(card, data.blocks, + idata->ic.write_flag & (1 << 31)); + if (err) + goto cmd_rel_host; + } + mmc_wait_for_req(card->host, &mrq); if (cmd.error) { @@ -478,6 +531,18 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev, } } + if (is_rpmb) { + /* + * Ensure RPMB command has completed by polling CMD13 + * "Send Status". + */ + err = ioctl_rpmb_card_status_poll(card, &status, 5); + if (err) + dev_err(mmc_dev(card->host), + "%s: Card Status=0x%08X, error %d\n", + __func__, status, err); + } + cmd_rel_host: mmc_release_host(card->host); @@ -1034,6 +1099,9 @@ static int mmc_blk_err_check(struct mmc_card *card, */ if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { u32 status; + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(MMC_BLK_TIMEOUT_MS); do { int err = get_card_status(card, &status, 5); if (err) { @@ -1041,6 +1109,17 @@ static int mmc_blk_err_check(struct mmc_card *card, req->rq_disk->disk_name, err); return MMC_BLK_CMD_ERR; } + + /* Timeout if the device never becomes ready for data + * and never leaves the program state. + */ + if (time_after(jiffies, timeout)) { + pr_err("%s: Card stuck in programming state!"\ + " %s %s\n", mmc_hostname(card->host), + req->rq_disk->disk_name, __func__); + + return MMC_BLK_CMD_ERR; + } /* * Some cards mishandle the status bits, * so make sure to check both the busy @@ -1504,6 +1583,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, md->disk->queue = md->queue.queue; md->disk->driverfs_dev = parent; set_disk_ro(md->disk, md->read_only || default_ro); + if (area_type & MMC_BLK_DATA_AREA_RPMB) + md->disk->flags |= GENHD_FL_NO_PART_SCAN; /* * As discussed on lkml, GENHD_FL_REMOVABLE should: |