From patchwork Fri Nov 3 13:20:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 10040033 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 638A6602DA for ; Fri, 3 Nov 2017 13:22:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63737295EE for ; Fri, 3 Nov 2017 13:22:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5878F295EF; Fri, 3 Nov 2017 13:22:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED60A295F5 for ; Fri, 3 Nov 2017 13:22:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756349AbdKCNVw (ORCPT ); Fri, 3 Nov 2017 09:21:52 -0400 Received: from mga09.intel.com ([134.134.136.24]:43703 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756289AbdKCNVQ (ORCPT ); Fri, 3 Nov 2017 09:21:16 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Nov 2017 06:21:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,338,1505804400"; d="scan'208";a="917240951" Received: from ahunter-desktop.fi.intel.com ([10.237.72.168]) by FMSMGA003.fm.intel.com with ESMTP; 03 Nov 2017 06:21:11 -0700 From: Adrian Hunter To: Ulf Hansson Cc: linux-mmc , linux-block , linux-kernel , Bough Chen , Alex Lemberg , Mateusz Nowak , Yuliy Izrailov , Jaehoon Chung , Dong Aisheng , Das Asutosh , Zhangfei Gao , Sahitya Tummala , Harjani Ritesh , Venu Byravarasu , Linus Walleij , Shawn Lin , Christoph Hellwig Subject: [PATCH V13 09/10] mmc: block: blk-mq: Stop using card_busy_detect() Date: Fri, 3 Nov 2017 15:20:19 +0200 Message-Id: <1509715220-31885-10-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1509715220-31885-1-git-send-email-adrian.hunter@intel.com> References: <1509715220-31885-1-git-send-email-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP card_busy_detect() doesn't set a correct timeout, and it doesn't take care of error status bits. Stop using it for blk-mq. Signed-off-by: Adrian Hunter --- drivers/mmc/core/block.c | 117 +++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 109 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 0c29b1d8d545..5c5ff3c34313 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1426,15 +1426,18 @@ static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, } } -#define CMD_ERRORS \ - (R1_OUT_OF_RANGE | /* Command argument out of range */ \ - R1_ADDRESS_ERROR | /* Misaligned address */ \ +#define CMD_ERRORS_EXCL_OOR \ + (R1_ADDRESS_ERROR | /* Misaligned address */ \ R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ R1_WP_VIOLATION | /* Tried to write to protected block */ \ R1_CARD_ECC_FAILED | /* Card ECC failed */ \ R1_CC_ERROR | /* Card controller error */ \ R1_ERROR) /* General/unknown error */ +#define CMD_ERRORS \ + (CMD_ERRORS_EXCL_OOR | \ + R1_OUT_OF_RANGE) /* Command argument out of range */ \ + static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) { u32 val; @@ -1951,6 +1954,95 @@ static void mmc_blk_ss_read(struct mmc_queue *mq, struct request *req) mqrq->retries = MMC_NO_RETRIES; } +static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) +{ + return !!brq->mrq.sbc; +} + +static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) +{ + return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; +} + +static inline bool mmc_blk_in_tran_state(u32 status) +{ + /* + * Some cards mishandle the status bits, so make sure to check both the + * busy indication and the card state. + */ + return status & R1_READY_FOR_DATA && + (R1_CURRENT_STATE(status) == R1_STATE_TRAN); +} + +static unsigned int mmc_blk_clock_khz(struct mmc_host *host) +{ + if (host->actual_clock) + return host->actual_clock / 1000; + + /* Clock may be subject to a divisor, fudge it by a factor of 2. */ + if (host->ios.clock) + return host->ios.clock / 2000; + + /* How can there be no clock */ + WARN_ON_ONCE(1); + return 100; /* 100 kHz is minimum possible value */ +} + +static unsigned long mmc_blk_data_timeout_jiffies(struct mmc_host *host, + struct mmc_data *data) +{ + unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); + unsigned int khz; + + if (data->timeout_clks) { + khz = mmc_blk_clock_khz(host); + ms += DIV_ROUND_UP(data->timeout_clks, khz); + } + + return msecs_to_jiffies(ms); +} + +static int mmc_blk_card_stuck(struct mmc_card *card, struct request *req, + u32 *resp_errs) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_data *data = &mqrq->brq.data; + unsigned long timeout; + u32 status; + int err; + + timeout = jiffies + mmc_blk_data_timeout_jiffies(card->host, data); + + while (1) { + bool done = time_after(jiffies, timeout); + + err = __mmc_send_status(card, &status, 5); + if (err) { + pr_err("%s: error %d requesting status\n", + req->rq_disk->disk_name, err); + break; + } + + /* Accumulate any response error bits seen */ + if (resp_errs) + *resp_errs |= status; + + if (mmc_blk_in_tran_state(status)) + break; + + /* Timeout if the device never becomes ready */ + if (done) { + pr_err("%s: Card stuck in wrong state! %s %s\n", + mmc_hostname(card->host), + req->rq_disk->disk_name, __func__); + err = -ETIMEDOUT; + break; + } + } + + return err; +} + static void mmc_blk_rw_recovery(struct mmc_queue *mq, struct request *req) { int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; @@ -2097,17 +2189,26 @@ static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) { struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); - bool gen_err = false; + u32 status = 0; int err; if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) return 0; - err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req, &gen_err); + err = mmc_blk_card_stuck(card, req, &status); + + /* + * Do not assume data transferred correctly if there are any error bits + * set. + */ + if (!err && status & mmc_blk_stop_err_bits(&mqrq->brq)) { + mqrq->brq.data.bytes_xfered = 0; + err = -EIO; + } - /* Copy the general error bit so it will be seen later on */ - if (gen_err) - mqrq->brq.stop.resp[0] |= R1_ERROR; + /* Copy the exception bit so it will be seen later on */ + if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT) + mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; return err; }