From 025e3d5fe157e8a12ed4ab59d0e147046c87cbd9 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Mon, 13 Mar 2017 14:36:39 +0200 Subject: [PATCH] mmc: block: Disable Command Queue while RPMB is used RPMB does not allow Command Queue commands. Disable and re-enable the Command Queue when switching. Note that the driver only switches partitions when the queue is empty. Signed-off-by: Adrian Hunter Reviewed-by: Harjani Ritesh Reviewed-by: Linus Walleij Signed-off-by: Ulf Hansson --- drivers/mmc/core/block.c | 46 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 38 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 018488e..d189e8c 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -728,10 +728,41 @@ static const struct block_device_operations mmc_bdops = { #endif }; +static int mmc_blk_part_switch_pre(struct mmc_card *card, + unsigned int part_type) +{ + int ret = 0; + + if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { + if (card->ext_csd.cmdq_en) { + ret = mmc_cmdq_disable(card); + if (ret) + return ret; + } + mmc_retune_pause(card->host); + } + + return ret; +} + +static int mmc_blk_part_switch_post(struct mmc_card *card, + unsigned int part_type) +{ + int ret = 0; + + if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) { + mmc_retune_unpause(card->host); + if (card->reenable_cmdq && !card->ext_csd.cmdq_en) + ret = mmc_cmdq_enable(card); + } + + return ret; +} + static inline int mmc_blk_part_switch(struct mmc_card *card, struct mmc_blk_data *md) { - int ret; + int ret = 0; struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev); if (main_md->part_curr == md->part_type) @@ -740,8 +771,9 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, if (mmc_card_mmc(card)) { u8 part_config = card->ext_csd.part_config; - if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) - mmc_retune_pause(card->host); + ret = mmc_blk_part_switch_pre(card, md->part_type); + if (ret) + return ret; part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; part_config |= md->part_type; @@ -750,19 +782,17 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, EXT_CSD_PART_CONFIG, part_config, card->ext_csd.part_time); if (ret) { - if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) - mmc_retune_unpause(card->host); + mmc_blk_part_switch_post(card, md->part_type); return ret; } card->ext_csd.part_config = part_config; - if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB) - mmc_retune_unpause(card->host); + ret = mmc_blk_part_switch_post(card, main_md->part_curr); } main_md->part_curr = md->part_type; - return 0; + return ret; } static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) -- 2.7.4