diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/core/core.c | 118 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 113 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.h | 1 |
3 files changed, 113 insertions, 119 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index d48be0b218ff..d7c934c67197 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -53,12 +53,6 @@ /* If the device is not responding */ #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ -/* - * Background operations can take a long time, depending on the housekeeping - * operations the card has to perform. - */ -#define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ - /* The max erase timeout, used when host->max_busy_timeout isn't specified */ #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ @@ -362,73 +356,6 @@ static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) return 0; } -/** - * mmc_start_bkops - start BKOPS for supported cards - * @card: MMC card to start BKOPS - * @form_exception: A flag to indicate if this function was - * called due to an exception raised by the card - * - * Start background operations whenever requested. - * When the urgent BKOPS bit is set in a R1 command response - * then background operations should be started immediately. -*/ -void mmc_start_bkops(struct mmc_card *card, bool from_exception) -{ - int err; - int timeout; - bool use_busy_signal; - - if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) - return; - - err = mmc_read_bkops_status(card); - if (err) { - pr_err("%s: Failed to read bkops status: %d\n", - mmc_hostname(card->host), err); - return; - } - - if (!card->ext_csd.raw_bkops_status) - return; - - if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && - from_exception) - return; - - mmc_claim_host(card->host); - if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { - timeout = MMC_BKOPS_MAX_TIMEOUT; - use_busy_signal = true; - } else { - timeout = 0; - use_busy_signal = false; - } - - mmc_retune_hold(card->host); - - err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BKOPS_START, 1, timeout, 0, - use_busy_signal, true, false); - if (err) { - pr_warn("%s: Error %d starting bkops\n", - mmc_hostname(card->host), err); - mmc_retune_release(card->host); - goto out; - } - - /* - * For urgent bkops status (LEVEL_2 and more) - * bkops executed synchronously, otherwise - * the operation is in progress - */ - if (!use_busy_signal) - mmc_card_set_doing_bkops(card); - else - mmc_retune_release(card->host); -out: - mmc_release_host(card->host); -} - /* * mmc_wait_data_done() - done callback for data request * @mrq: done data request @@ -841,51 +768,6 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries EXPORT_SYMBOL(mmc_wait_for_cmd); /** - * mmc_stop_bkops - stop ongoing BKOPS - * @card: MMC card to check BKOPS - * - * Send HPI command to stop ongoing background operations to - * allow rapid servicing of foreground operations, e.g. read/ - * writes. Wait until the card comes out of the programming state - * to avoid errors in servicing read/write requests. - */ -int mmc_stop_bkops(struct mmc_card *card) -{ - int err = 0; - - err = mmc_interrupt_hpi(card); - - /* - * If err is EINVAL, we can't issue an HPI. - * It should complete the BKOPS. - */ - if (!err || (err == -EINVAL)) { - mmc_card_clr_doing_bkops(card); - mmc_retune_release(card->host); - err = 0; - } - - return err; -} - -int mmc_read_bkops_status(struct mmc_card *card) -{ - int err; - u8 *ext_csd; - - mmc_claim_host(card->host); - err = mmc_get_ext_csd(card, &ext_csd); - mmc_release_host(card->host); - if (err) - return err; - - card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; - card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; - kfree(ext_csd); - return 0; -} - -/** * mmc_set_data_timeout - set the timeout for a data command * @data: data phase for command * @card: the MMC card associated with the data transfer diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index ae1fc4818240..a631f74efca9 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -19,6 +19,7 @@ #include <linux/mmc/mmc.h> #include "core.h" +#include "card.h" #include "host.h" #include "mmc_ops.h" @@ -845,6 +846,118 @@ int mmc_can_ext_csd(struct mmc_card *card) return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3); } +/** + * mmc_stop_bkops - stop ongoing BKOPS + * @card: MMC card to check BKOPS + * + * Send HPI command to stop ongoing background operations to + * allow rapid servicing of foreground operations, e.g. read/ + * writes. Wait until the card comes out of the programming state + * to avoid errors in servicing read/write requests. + */ +int mmc_stop_bkops(struct mmc_card *card) +{ + int err = 0; + + err = mmc_interrupt_hpi(card); + + /* + * If err is EINVAL, we can't issue an HPI. + * It should complete the BKOPS. + */ + if (!err || (err == -EINVAL)) { + mmc_card_clr_doing_bkops(card); + mmc_retune_release(card->host); + err = 0; + } + + return err; +} + +static int mmc_read_bkops_status(struct mmc_card *card) +{ + int err; + u8 *ext_csd; + + mmc_claim_host(card->host); + err = mmc_get_ext_csd(card, &ext_csd); + mmc_release_host(card->host); + if (err) + return err; + + card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; + card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; + kfree(ext_csd); + return 0; +} + +/** + * mmc_start_bkops - start BKOPS for supported cards + * @card: MMC card to start BKOPS + * @form_exception: A flag to indicate if this function was + * called due to an exception raised by the card + * + * Start background operations whenever requested. + * When the urgent BKOPS bit is set in a R1 command response + * then background operations should be started immediately. +*/ +void mmc_start_bkops(struct mmc_card *card, bool from_exception) +{ + int err; + int timeout; + bool use_busy_signal; + + if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) + return; + + err = mmc_read_bkops_status(card); + if (err) { + pr_err("%s: Failed to read bkops status: %d\n", + mmc_hostname(card->host), err); + return; + } + + if (!card->ext_csd.raw_bkops_status) + return; + + if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && + from_exception) + return; + + mmc_claim_host(card->host); + if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { + timeout = MMC_OPS_TIMEOUT_MS; + use_busy_signal = true; + } else { + timeout = 0; + use_busy_signal = false; + } + + mmc_retune_hold(card->host); + + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BKOPS_START, 1, timeout, 0, + use_busy_signal, true, false); + if (err) { + pr_warn("%s: Error %d starting bkops\n", + mmc_hostname(card->host), err); + mmc_retune_release(card->host); + goto out; + } + + /* + * For urgent bkops status (LEVEL_2 and more) + * bkops executed synchronously, otherwise + * the operation is in progress + */ + if (!use_busy_signal) + mmc_card_set_doing_bkops(card); + else + mmc_retune_release(card->host); +out: + mmc_release_host(card->host); +} + static int mmc_cmdq_switch(struct mmc_card *card, bool enable) { u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0; diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index b8d05529a6ce..2e97271efc14 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -43,7 +43,6 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, unsigned int timeout_ms); int mmc_stop_bkops(struct mmc_card *card); -int mmc_read_bkops_status(struct mmc_card *card); void mmc_start_bkops(struct mmc_card *card, bool from_exception); int mmc_can_reset(struct mmc_card *card); int mmc_flush_cache(struct mmc_card *card); |
