Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753586Ab2B0LR4 (ORCPT ); Mon, 27 Feb 2012 06:17:56 -0500 Received: from wolverine02.qualcomm.com ([199.106.114.251]:4977 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753502Ab2B0LRt (ORCPT ); Mon, 27 Feb 2012 06:17:49 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6632"; a="164454748" From: Yaniv Gardi To: linux-mmc@vger.kernel.org Cc: axboe@kernel.dk, ygardi@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org (open list) Subject: [PATCH v5 2/2] mmc: card: Adding support for Sanitize in eMMC v4.5 Date: Mon, 27 Feb 2012 13:17:29 +0200 Message-Id: <1330341449-25686-3-git-send-email-ygardi@codeaurora.org> X-Mailer: git-send-email 1.7.6 In-Reply-To: <1330341449-25686-1-git-send-email-ygardi@codeaurora.org> References: <1330341449-25686-1-git-send-email-ygardi@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6353 Lines: 186 Signed-off-by: Yaniv Gardi --- drivers/mmc/card/block.c | 56 ++++++++++++++++++++++++++++++++++++++------- drivers/mmc/card/queue.c | 10 +++++++- include/linux/mmc/card.h | 7 +++++ include/linux/mmc/host.h | 1 + 4 files changed, 64 insertions(+), 10 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 0c959c9..5cb4ba1 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -830,6 +830,9 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) from = blk_rq_pos(req); nr = blk_rq_sectors(req); + /* 1ST priority is DISCARD. + 2ND is TRIM + 3RD is ERASE */ if (mmc_can_discard(card)) arg = MMC_DISCARD_ARG; else if (mmc_can_trim(card)) @@ -868,18 +871,11 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, unsigned int from, nr, arg; int err = 0, type = MMC_BLK_SECDISCARD; - if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) { + if (!(mmc_can_secure_erase_trim(card))) { err = -EOPNOTSUPP; goto out; } - /* The sanitize operation is supported at v4.5 only */ - if (mmc_can_sanitize(card)) { - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_SANITIZE_START, 1, 0); - goto out; - } - from = blk_rq_pos(req); nr = blk_rq_sectors(req); @@ -922,6 +918,42 @@ out: return err ? 0 : 1; } +int mmc_blk_issue_sanitize_rq(struct mmc_queue *mq, + struct request *req) +{ + struct mmc_blk_data *md = mq->data; + struct mmc_card *card = md->queue.card; + int err = 0; + + BUG_ON(card == NULL); + BUG_ON(card->host == NULL); + + if (!(mmc_can_sanitize(card) && + (card->host->caps2 & MMC_CAP2_SANITIZE))) { + pr_err("%s: SANITIZE is not supported", __func__); + err = -EOPNOTSUPP; + goto out; + } + + mmc_sd_card_set_sanitize_in_progress(card); + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_SANITIZE_START, 1, 0); + + if (err) + pr_err("%s: mmc%d: mmc_switch() failed. err=%d\n", + __func__, card->host->index, err); + + mmc_sd_card_set_sanitize_completed(card); + +out: + spin_lock_irq(&md->lock); + __blk_end_request(req, err, blk_rq_bytes(req)); + spin_unlock_irq(&md->lock); + + return err ? 0 : 1; +} + static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) { struct mmc_blk_data *md = mq->data; @@ -1379,7 +1411,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) goto out; } - if (req && req->cmd_flags & REQ_DISCARD) { + if (req && req->cmd_flags & REQ_SANITIZE) { + /* complete ongoing async transfer before issuing sanitize */ + if (card->host && card->host->areq) + mmc_blk_issue_rw_rq(mq, NULL); + ret = mmc_blk_issue_sanitize_rq(mq, req); + } else if (req && req->cmd_flags & REQ_DISCARD) { /* complete ongoing async transfer before issuing discard */ if (card->host->areq) mmc_blk_issue_rw_rq(mq, NULL); @@ -1396,6 +1433,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) ret = mmc_blk_issue_rw_rq(mq, req); } + out: if (!req) /* release host only when there are no more requests */ diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index dcad59c..ad6605d 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -140,10 +140,15 @@ static void mmc_queue_setup_discard(struct request_queue *q, /* granularity must not be greater than max. discard */ if (card->pref_erase > max_discard) q->limits.discard_granularity = 0; - if (mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card)) + if (mmc_can_secure_erase_trim(card)) queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q); } +static void mmc_queue_setup_sanitize(struct request_queue *q) +{ + queue_flag_set_unlocked(QUEUE_FLAG_SANITIZE, q); +} + /** * mmc_init_queue - initialise a queue structure. * @mq: mmc queue @@ -181,6 +186,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, if (mmc_can_erase(card)) mmc_queue_setup_discard(mq->queue, card); + if ((mmc_can_sanitize(card) && (host->caps2 & MMC_CAP2_SANITIZE))) + mmc_queue_setup_sanitize(mq->queue); + #ifdef CONFIG_MMC_BLOCK_BOUNCE if (host->max_segs == 1) { unsigned int bouncesz; diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 9478a6b..0890e9c 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -236,6 +236,9 @@ struct mmc_card { #define MMC_POWEROFF_SHORT 2 #define MMC_POWEROFF_LONG 3 +/* card is in sanitize progress */ +#define MMC_STATE_SANITIZE_IN_PROGRESS (1<<9) + unsigned int erase_size; /* erase size in sectors */ unsigned int erase_shift; /* if erase unit is power 2 */ unsigned int pref_erase; /* in sectors */ @@ -388,6 +391,10 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data) #define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR) #define mmc_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED) #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED) +#define mmc_sd_card_set_sanitize_in_progress(c) ((c)->state |= \ + MMC_STATE_SANITIZE_IN_PROGRESS) +#define mmc_sd_card_set_sanitize_completed(c) ((c)->state &= \ + ~MMC_STATE_SANITIZE_IN_PROGRESS) #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC) #define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED) diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 9a03d03..93210aa 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -242,6 +242,7 @@ struct mmc_host { #define MMC_CAP2_CACHE_CTRL (1 << 1) /* Allow cache control */ #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */ #define MMC_CAP2_NO_MULTI_READ (1 << 3) /* Multiblock reads don't work */ +#define MMC_CAP2_SANITIZE (1<<4) /* Support Sanitize */ mmc_pm_flag_t pm_caps; /* supported pm features */ unsigned int power_notify_type; -- 1.7.6 -- Sent by a consultant of the Qualcomm Innovation Center, Inc. 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