From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH V5 12/25] mmc: block: Disable Command Queue while RPMB is used Date: Mon, 24 Oct 2016 11:37:27 +0300 Message-ID: <1477298260-5064-13-git-send-email-adrian.hunter@intel.com> References: <1477298260-5064-1-git-send-email-adrian.hunter@intel.com> Return-path: Received: from mga09.intel.com ([134.134.136.24]:33721 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935974AbcJXInX (ORCPT ); Mon, 24 Oct 2016 04:43:23 -0400 In-Reply-To: <1477298260-5064-1-git-send-email-adrian.hunter@intel.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Ulf Hansson Cc: linux-mmc , Alex Lemberg , Mateusz Nowak , Yuliy Izrailov , Jaehoon Chung , Dong Aisheng , Das Asutosh , Zhangfei Gao , Dorfman Konstantin , David Griego , Sahitya Tummala , Harjani Ritesh , Venu Byravarasu 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 --- drivers/mmc/card/block.c | 46 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 38 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 85c9f14a2c53..8a3d92ae22b3 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -746,10 +746,41 @@ static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, #endif }; +static int mmc_blk_part_switch_pre(struct mmc_card *card, + unsigned int part_type) +{ + int ret; + + 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 0; +} + +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) @@ -758,8 +789,9 @@ 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; @@ -768,19 +800,17 @@ 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 u32 mmc_sd_num_wr_blocks(struct mmc_card *card) -- 1.9.1