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authorAdrian Hunter <adrian.hunter@intel.com>2017-03-13 14:36:39 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2017-04-24 21:42:03 +0200
commit025e3d5fe157e8a12ed4ab59d0e147046c87cbd9 (patch)
tree98a908cd9aa3a0a8c5e16499fa23bb1b1adf30f3 /drivers/mmc
parent9d4579a85c84340044b10ffa6cd576397f59dc93 (diff)
downloadlinux-025e3d5fe157e8a12ed4ab59d0e147046c87cbd9.tar.bz2
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 <adrian.hunter@intel.com> Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/block.c46
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 018488e7f194..d189e8c4436e 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)