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
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);
struct mmc_card *card;
struct mmc_command cmd = {0};
struct mmc_data data = {0};
- struct mmc_request mrq = {0};
+ struct mmc_request mrq = {NULL};
struct scatterlist sg;
int err;
{
int ret;
struct mmc_blk_data *main_md = mmc_get_drvdata(card);
+
if (main_md->part_curr == md->part_type)
return 0;
if (mmc_card_mmc(card)) {
- card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
- card->ext_csd.part_config |= md->part_type;
+ u8 part_config = card->ext_csd.part_config;
+
+ part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
+ part_config |= md->part_type;
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_PART_CONFIG, card->ext_csd.part_config,
+ EXT_CSD_PART_CONFIG, part_config,
card->ext_csd.part_time);
if (ret)
return ret;
-}
+
+ card->ext_csd.part_config = part_config;
+ }
main_md->part_curr = md->part_type;
return 0;
u32 result;
__be32 *blocks;
- struct mmc_request mrq = {0};
+ struct mmc_request mrq = {NULL};
struct mmc_command cmd = {0};
struct mmc_data data = {0};
unsigned int timeout_us;
* 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;
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.)
*/
if (err)
return ERR_ABORT;
+ if (stop_status & R1_CARD_ECC_FAILED)
+ *ecc_err = 1;
}
/* Check for set block count errors */
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,
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;
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,
}
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);
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;
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,
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);
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
* 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:
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,
/*
* Reliable writes are used to implement Forced Unit Access and
* REQ_META accesses, and are supported only on MMCs.
+ *
+ * XXX: this really needs a good explanation of why REQ_META
+ * is treated special.
*/
bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
(req->cmd_flags & REQ_META)) &&
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;
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) {
/*
* 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);
}
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
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);
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)
ret = mmc_blk_part_switch(card, md);
if (ret) {
+ if (req) {
+ spin_lock_irq(&md->lock);
+ __blk_end_request_all(req, -EIO);
+ spin_unlock_irq(&md->lock);
+ }
ret = 0;
goto out;
}
if (!mmc_card_mmc(card))
return 0;
- if (card->ext_csd.boot_size) {
+ if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) {
ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0,
card->ext_csd.boot_size >> 9,
true,
git.openpandora.org / pandora-kernel.git / blobdiff