diff options
Diffstat (limited to 'drivers/mmc/card/block.c')
| -rw-r--r-- | drivers/mmc/card/block.c | 201 |
1 files changed, 142 insertions, 59 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 9b9072636687..66c7596c5546 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -94,6 +94,11 @@ struct mmc_blk_data { unsigned int read_only; unsigned int part_type; unsigned int name_idx; + unsigned int reset_done; +#define MMC_BLK_READ BIT(0) +#define MMC_BLK_WRITE BIT(1) +#define MMC_BLK_DISCARD BIT(2) +#define MMC_BLK_SECDISCARD BIT(3) /* * Only set in main mmc_blk_data associated @@ -109,11 +114,11 @@ static DEFINE_MUTEX(open_lock); enum mmc_blk_status { MMC_BLK_SUCCESS = 0, MMC_BLK_PARTIAL, - MMC_BLK_RETRY, - MMC_BLK_RETRY_SINGLE, - MMC_BLK_DATA_ERR, MMC_BLK_CMD_ERR, + MMC_BLK_RETRY, MMC_BLK_ABORT, + MMC_BLK_DATA_ERR, + MMC_BLK_ECC_ERR, }; module_param(perdev_minors, int, 0444); @@ -454,7 +459,7 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, card->ext_csd.part_time); if (ret) return ret; -} + } main_md->part_curr = md->part_type; return 0; @@ -616,7 +621,7 @@ static int mmc_blk_cmd_error(struct request *req, const char *name, int error, * Otherwise we don't understand what happened, so abort. */ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, - struct mmc_blk_request *brq) + struct mmc_blk_request *brq, int *ecc_err) { bool prev_cmd_status_valid = true; u32 status, stop_status = 0; @@ -641,6 +646,12 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, if (err) return ERR_ABORT; + /* Flag ECC errors */ + if ((status & R1_CARD_ECC_FAILED) || + (brq->stop.resp[0] & R1_CARD_ECC_FAILED) || + (brq->cmd.resp[0] & R1_CARD_ECC_FAILED)) + *ecc_err = 1; + /* * Check the current card state. If it is in some data transfer * mode, tell it to stop (and hopefully transition back to TRAN.) @@ -658,6 +669,8 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, */ if (err) return ERR_ABORT; + if (stop_status & R1_CARD_ECC_FAILED) + *ecc_err = 1; } /* Check for set block count errors */ @@ -670,6 +683,10 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error, prev_cmd_status_valid, status); + /* Data errors */ + if (!brq->stop.error) + return ERR_CONTINUE; + /* Now for stop errors. These aren't fatal to the transfer. */ pr_err("%s: error %d sending stop command, original cmd response %#x, card status %#x\n", req->rq_disk->disk_name, brq->stop.error, @@ -686,12 +703,45 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, return ERR_CONTINUE; } +static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, + int type) +{ + int err; + + if (md->reset_done & type) + return -EEXIST; + + md->reset_done |= type; + err = mmc_hw_reset(host); + /* Ensure we switch back to the correct partition */ + if (err != -EOPNOTSUPP) { + struct mmc_blk_data *main_md = mmc_get_drvdata(host->card); + int part_err; + + main_md->part_curr = main_md->part_type; + part_err = mmc_blk_part_switch(host->card, md); + if (part_err) { + /* + * We have failed to get back into the correct + * partition, so we need to abort the whole request. + */ + return -ENODEV; + } + } + return err; +} + +static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) +{ + md->reset_done &= ~type; +} + static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) { struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; unsigned int from, nr, arg; - int err = 0; + int err = 0, type = MMC_BLK_DISCARD; if (!mmc_can_erase(card)) { err = -EOPNOTSUPP; @@ -705,7 +755,7 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) arg = MMC_TRIM_ARG; else arg = MMC_ERASE_ARG; - +retry: if (card->quirks & MMC_QUIRK_INAND_CMD38) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, INAND_CMD38_ARG_EXT_CSD, @@ -718,6 +768,10 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) } err = mmc_erase(card, from, nr, arg); out: + if (err == -EIO && !mmc_blk_reset(md, card->host, type)) + goto retry; + if (!err) + mmc_blk_reset_success(md, type); spin_lock_irq(&md->lock); __blk_end_request(req, err, blk_rq_bytes(req)); spin_unlock_irq(&md->lock); @@ -731,7 +785,7 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; unsigned int from, nr, arg; - int err = 0; + int err = 0, type = MMC_BLK_SECDISCARD; if (!mmc_can_secure_erase_trim(card)) { err = -EOPNOTSUPP; @@ -745,7 +799,7 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, arg = MMC_SECURE_TRIM1_ARG; else arg = MMC_SECURE_ERASE_ARG; - +retry: if (card->quirks & MMC_QUIRK_INAND_CMD38) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, INAND_CMD38_ARG_EXT_CSD, @@ -769,6 +823,10 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); } out: + if (err == -EIO && !mmc_blk_reset(md, card->host, type)) + goto retry; + if (!err) + mmc_blk_reset_success(md, type); spin_lock_irq(&md->lock); __blk_end_request(req, err, blk_rq_bytes(req)); spin_unlock_irq(&md->lock); @@ -825,11 +883,11 @@ static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, static int mmc_blk_err_check(struct mmc_card *card, struct mmc_async_req *areq) { - enum mmc_blk_status ret = MMC_BLK_SUCCESS; struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req, mmc_active); struct mmc_blk_request *brq = &mq_mrq->brq; struct request *req = mq_mrq->req; + int ecc_err = 0; /* * sbc.error indicates a problem with the set block count @@ -841,8 +899,9 @@ static int mmc_blk_err_check(struct mmc_card *card, * stop.error indicates a problem with the stop command. Data * may have been transferred, or may still be transferring. */ - if (brq->sbc.error || brq->cmd.error || brq->stop.error) { - switch (mmc_blk_cmd_recovery(card, req, brq)) { + if (brq->sbc.error || brq->cmd.error || brq->stop.error || + brq->data.error) { + switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err)) { case ERR_RETRY: return MMC_BLK_RETRY; case ERR_ABORT: @@ -894,23 +953,21 @@ static int mmc_blk_err_check(struct mmc_card *card, brq->cmd.resp[0], brq->stop.resp[0]); if (rq_data_dir(req) == READ) { - if (brq->data.blocks > 1) { - /* Redo read one sector at a time */ - pr_warning("%s: retrying using single block read\n", - req->rq_disk->disk_name); - return MMC_BLK_RETRY_SINGLE; - } + if (ecc_err) + return MMC_BLK_ECC_ERR; return MMC_BLK_DATA_ERR; } else { return MMC_BLK_CMD_ERR; } } - if (ret == MMC_BLK_SUCCESS && - blk_rq_bytes(req) != brq->data.bytes_xfered) - ret = MMC_BLK_PARTIAL; + if (!brq->data.bytes_xfered) + return MMC_BLK_RETRY; - return ret; + if (blk_rq_bytes(req) != brq->data.bytes_xfered) + return MMC_BLK_PARTIAL; + + return MMC_BLK_SUCCESS; } static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, @@ -1049,12 +1106,41 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, mmc_queue_bounce_pre(mqrq); } +static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, + struct mmc_blk_request *brq, struct request *req, + int ret) +{ + /* + * If this is an SD card and we're writing, we can first + * mark the known good sectors as ok. + * + * If the card is not SD, we can still ok written sectors + * as reported by the controller (which might be less than + * the real number of written sectors, but never more). + */ + if (mmc_card_sd(card)) { + u32 blocks; + + blocks = mmc_sd_num_wr_blocks(card); + if (blocks != (u32)-1) { + spin_lock_irq(&md->lock); + ret = __blk_end_request(req, 0, blocks << 9); + spin_unlock_irq(&md->lock); + } + } else { + spin_lock_irq(&md->lock); + ret = __blk_end_request(req, 0, brq->data.bytes_xfered); + spin_unlock_irq(&md->lock); + } + return ret; +} + static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) { struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; struct mmc_blk_request *brq = &mq->mqrq_cur->brq; - int ret = 1, disable_multi = 0, retry = 0; + int ret = 1, disable_multi = 0, retry = 0, type; enum mmc_blk_status status; struct mmc_queue_req *mq_rq; struct request *req; @@ -1076,6 +1162,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) mq_rq = container_of(areq, struct mmc_queue_req, mmc_active); brq = &mq_rq->brq; req = mq_rq->req; + type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; mmc_queue_bounce_post(mq_rq); switch (status) { @@ -1084,17 +1171,17 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) /* * A block was successfully transferred. */ + mmc_blk_reset_success(md, type); spin_lock_irq(&md->lock); ret = __blk_end_request(req, 0, brq->data.bytes_xfered); spin_unlock_irq(&md->lock); + /* + * If the blk_end_request function returns non-zero even + * though all data has been transferred and no errors + * were returned by the host controller, it's a bug. + */ if (status == MMC_BLK_SUCCESS && ret) { - /* - * The blk_end_request has returned non zero - * even though all data is transfered and no - * erros returned by host. - * If this happen it's a bug. - */ printk(KERN_ERR "%s BUG rq_tot %d d_xfer %d\n", __func__, blk_rq_bytes(req), brq->data.bytes_xfered); @@ -1103,16 +1190,36 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) } break; case MMC_BLK_CMD_ERR: - goto cmd_err; - case MMC_BLK_RETRY_SINGLE: - disable_multi = 1; - break; + ret = mmc_blk_cmd_err(md, card, brq, req, ret); + if (!mmc_blk_reset(md, card->host, type)) + break; + goto cmd_abort; case MMC_BLK_RETRY: if (retry++ < 5) break; + /* Fall through */ case MMC_BLK_ABORT: + if (!mmc_blk_reset(md, card->host, type)) + break; goto cmd_abort; - case MMC_BLK_DATA_ERR: + case MMC_BLK_DATA_ERR: { + int err; + + err = mmc_blk_reset(md, card->host, type); + if (!err) + break; + if (err == -ENODEV) + goto cmd_abort; + /* Fall through */ + } + case MMC_BLK_ECC_ERR: + if (brq->data.blocks > 1) { + /* Redo read one sector at a time */ + pr_warning("%s: retrying using single block read\n", + req->rq_disk->disk_name); + disable_multi = 1; + break; + } /* * After an error, we redo I/O one sector at a * time, so we only reach here after trying to @@ -1129,7 +1236,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) if (ret) { /* - * In case of a none complete request + * In case of a incomplete request * prepare it again and resend. */ mmc_blk_rw_rq_prep(mq_rq, card, disable_multi, mq); @@ -1139,30 +1246,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) return 1; - cmd_err: - /* - * If this is an SD card and we're writing, we can first - * mark the known good sectors as ok. - * - * If the card is not SD, we can still ok written sectors - * as reported by the controller (which might be less than - * the real number of written sectors, but never more). - */ - if (mmc_card_sd(card)) { - u32 blocks; - - blocks = mmc_sd_num_wr_blocks(card); - if (blocks != (u32)-1) { - spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, blocks << 9); - spin_unlock_irq(&md->lock); - } - } else { - spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, brq->data.bytes_xfered); - spin_unlock_irq(&md->lock); - } - cmd_abort: spin_lock_irq(&md->lock); while (ret) |