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[2001:b400:e283:474:753d:295c:237e:167b]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-6f4d2af2a98sm22223760b3a.169.2024.05.22.04.09.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 May 2024 04:09:46 -0700 (PDT) From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org, dlunev@chromium.org, Victor Shih , Ben Chuang , Victor Shih Subject: [PATCH V16 08/23] mmc: core: Support UHS-II Auto Command Error Recovery Date: Wed, 22 May 2024 19:08:54 +0800 Message-Id: <20240522110909.10060-9-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240522110909.10060-1-victorshihgli@gmail.com> References: <20240522110909.10060-1-victorshihgli@gmail.com> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Victor Shih Add UHS-II Auto Command Error Recovery functionality into the MMC request processing flow. Signed-off-by: Ben Chuang Signed-off-by: Victor Shih --- Updates in V16: - Separate the Error Recovery mechanism from patch#7 to patch#8. --- drivers/mmc/core/core.c | 4 ++ drivers/mmc/core/core.h | 1 + drivers/mmc/core/sd_uhs2.c | 80 ++++++++++++++++++++++++++++++++++++++ include/linux/mmc/host.h | 6 +++ 4 files changed, 91 insertions(+) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 68496c51a521..18642afc405f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -403,6 +403,10 @@ void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) while (1) { wait_for_completion(&mrq->completion); + if (host->ops->get_cd(host)) + if (mrq->cmd->error || (mrq->data && mrq->data->error)) + mmc_sd_uhs2_error_recovery(host, mrq); + cmd = mrq->cmd; if (!cmd->error || !cmd->retries || diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 920323faa834..259d47c8bb19 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -82,6 +82,7 @@ int mmc_attach_mmc(struct mmc_host *host); int mmc_attach_sd(struct mmc_host *host); int mmc_attach_sdio(struct mmc_host *host); int mmc_attach_sd_uhs2(struct mmc_host *host); +void mmc_sd_uhs2_error_recovery(struct mmc_host *mmc, struct mmc_request *mrq); /* Module parameters */ extern bool use_spi_crc; diff --git a/drivers/mmc/core/sd_uhs2.c b/drivers/mmc/core/sd_uhs2.c index 85939a2582dc..d5acb4e6ccac 100644 --- a/drivers/mmc/core/sd_uhs2.c +++ b/drivers/mmc/core/sd_uhs2.c @@ -1324,3 +1324,83 @@ int mmc_attach_sd_uhs2(struct mmc_host *host) return err; } + +static void sd_uhs2_abort_trans(struct mmc_host *mmc) +{ + struct mmc_request mrq = {}; + struct mmc_command cmd = {0}; + struct uhs2_command uhs2_cmd = {}; + int err; + + mrq.cmd = &cmd; + mmc->ongoing_mrq = &mrq; + + uhs2_cmd.header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD | + mmc->card->uhs2_config.node_id; + uhs2_cmd.arg = ((UHS2_DEV_CMD_TRANS_ABORT & 0xFF) << 8) | + UHS2_NATIVE_CMD_WRITE | + (UHS2_DEV_CMD_TRANS_ABORT >> 8); + + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, 0, 0); + err = mmc_wait_for_cmd(mmc, &cmd, 0); + + if (err) + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n", + mmc_hostname(mmc), __func__, err); +} + +static void sd_uhs2_abort_status_read(struct mmc_host *mmc) +{ + struct mmc_request mrq = {}; + struct mmc_command cmd = {0}; + struct uhs2_command uhs2_cmd = {}; + int err; + + mrq.cmd = &cmd; + mmc->ongoing_mrq = &mrq; + + uhs2_cmd.header = UHS2_NATIVE_PACKET | + UHS2_PACKET_TYPE_CCMD | + mmc->card->uhs2_config.node_id; + uhs2_cmd.arg = ((UHS2_DEV_STATUS_REG & 0xFF) << 8) | + UHS2_NATIVE_CMD_READ | + UHS2_NATIVE_CMD_PLEN_4B | + (UHS2_DEV_STATUS_REG >> 8); + + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, 0, 0); + err = mmc_wait_for_cmd(mmc, &cmd, 0); + + if (err) + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n", + mmc_hostname(mmc), __func__, err); +} + +void mmc_sd_uhs2_error_recovery(struct mmc_host *mmc, struct mmc_request *mrq) +{ + mmc->ops->uhs2_reset_cmd_data(mmc); + + if (mrq->data) { + if (mrq->data->error && mmc_card_uhs2(mmc)) { + if (mrq->cmd) { + switch (mrq->cmd->error) { + case ETIMEDOUT: + case EILSEQ: + case EIO: + sd_uhs2_abort_trans(mmc); + sd_uhs2_abort_status_read(mmc); + break; + default: + break; + } + } + } + } else { + if (mrq->cmd) { + switch (mrq->cmd->error) { + case ETIMEDOUT: + sd_uhs2_abort_trans(mmc); + break; + } + } + } +} diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index fc9520b3bfa4..c914a58f7e1e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -271,6 +271,12 @@ struct mmc_host_ops { * negative errno in case of a failure or zero for success. */ int (*uhs2_control)(struct mmc_host *host, enum sd_uhs2_operation op); + + /* + * The uhs2_reset_cmd_data callback is used to excute reset + * when a auto command error occurs. + */ + void (*uhs2_reset_cmd_data)(struct mmc_host *host); }; struct mmc_cqe_ops {