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Message-ID: <d643e80e-a7a7-818f-5d75-09d198e1a5b3@intel.com>
Date: Tue, 26 Apr 2022 10:51:31 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Shaik Sajida Bhanu <quic_c_sbhanu@...cinc.com>,
ulf.hansson@...aro.org, wsa+renesas@...g-engineering.com,
yoshihiro.shimoda.uh@...esas.com, linus.walleij@...aro.org,
digetx@...il.com, briannorris@...omium.org,
quic_riteshh@...cinc.com
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
quic_asutoshd@...cinc.com, quic_rampraka@...cinc.com,
quic_pragalla@...cinc.com, quic_sartgarg@...cinc.com,
quic_nitirawa@...cinc.com, quic_sayalil@...cinc.com,
Liangliang Lu <quic_luliang@...cinc.com>,
"Bao D . Nguyen" <quic_nguyenb@...cinc.com>
Subject: Re: [PATCH V5 2/5] mmc: sdhci: Capture eMMC and SD card errors
On 25/04/22 19:00, Shaik Sajida Bhanu wrote:
> Add changes to capture eMMC and SD card errors.
> This is useful for debug and testing.
>
> Signed-off-by: Liangliang Lu <quic_luliang@...cinc.com>
> Signed-off-by: Sayali Lokhande <quic_sayalil@...cinc.com>
> Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
> Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@...cinc.com>
Looks good. A couple of minor comments.
> ---
> drivers/mmc/host/sdhci.c | 54 ++++++++++++++++++++++++++++++++++++------------
> drivers/mmc/host/sdhci.h | 3 +++
> include/linux/mmc/mmc.h | 6 ++++++
> 3 files changed, 50 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 2215202..1cda28ba 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -224,6 +224,7 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
> if (timedout) {
> pr_err("%s: Reset 0x%x never completed.\n",
> mmc_hostname(host->mmc), (int)mask);
> + sdhci_err_stats_inc(host, CTRL_TIMEOUT);
> sdhci_dumpregs(host);
> return;
> }
> @@ -1716,6 +1717,7 @@ static bool sdhci_send_command_retry(struct sdhci_host *host,
> if (!timeout--) {
> pr_err("%s: Controller never released inhibit bit(s).\n",
> mmc_hostname(host->mmc));
> + sdhci_err_stats_inc(host, CTRL_TIMEOUT);
> sdhci_dumpregs(host);
> cmd->error = -EIO;
> return false;
> @@ -1965,6 +1967,7 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
> if (timedout) {
> pr_err("%s: Internal clock never stabilised.\n",
> mmc_hostname(host->mmc));
> + sdhci_err_stats_inc(host, CTRL_TIMEOUT);
> sdhci_dumpregs(host);
> return;
> }
> @@ -1987,6 +1990,7 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
> if (timedout) {
> pr_err("%s: PLL clock never stabilised.\n",
> mmc_hostname(host->mmc));
> + sdhci_err_stats_inc(host, CTRL_TIMEOUT);
> sdhci_dumpregs(host);
> return;
> }
> @@ -3161,6 +3165,7 @@ static void sdhci_timeout_timer(struct timer_list *t)
> if (host->cmd && !sdhci_data_line_cmd(host->cmd)) {
> pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
> mmc_hostname(host->mmc));
> + sdhci_err_stats_inc(host, REQ_TIMEOUT);
> sdhci_dumpregs(host);
>
> host->cmd->error = -ETIMEDOUT;
> @@ -3183,6 +3188,7 @@ static void sdhci_timeout_data_timer(struct timer_list *t)
> (host->cmd && sdhci_data_line_cmd(host->cmd))) {
> pr_err("%s: Timeout waiting for hardware interrupt.\n",
> mmc_hostname(host->mmc));
> + sdhci_err_stats_inc(host, REQ_TIMEOUT);
> sdhci_dumpregs(host);
>
> if (host->data) {
> @@ -3234,17 +3240,21 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
> return;
> pr_err("%s: Got command interrupt 0x%08x even though no command operation was in progress.\n",
> mmc_hostname(host->mmc), (unsigned)intmask);
> + sdhci_err_stats_inc(host, UNEXPECTED_IRQ);
> sdhci_dumpregs(host);
> return;
> }
>
> if (intmask & (SDHCI_INT_TIMEOUT | SDHCI_INT_CRC |
> SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) {
> - if (intmask & SDHCI_INT_TIMEOUT)
> + if (intmask & SDHCI_INT_TIMEOUT) {
> host->cmd->error = -ETIMEDOUT;
> - else
> + sdhci_err_stats_inc(host, CMD_TIMEOUT);
> + } else {
> host->cmd->error = -EILSEQ;
> -
> + if (!mmc_op_tuning(host->cmd->opcode))
> + sdhci_err_stats_inc(host, CMD_CRC);
> + }
> /* Treat data command CRC error the same as data CRC error */
> if (host->cmd->data &&
> (intmask & (SDHCI_INT_CRC | SDHCI_INT_TIMEOUT)) ==
> @@ -3266,6 +3276,8 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
> -ETIMEDOUT :
> -EILSEQ;
>
> + sdhci_err_stats_inc(host, AUTO_CMD);
> +
> if (sdhci_auto_cmd23(host, mrq)) {
> mrq->sbc->error = err;
> __sdhci_finish_mrq(host, mrq);
> @@ -3342,6 +3354,7 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
> if (intmask & SDHCI_INT_DATA_TIMEOUT) {
> host->data_cmd = NULL;
> data_cmd->error = -ETIMEDOUT;
> + sdhci_err_stats_inc(host, CMD_TIMEOUT);
> __sdhci_finish_mrq(host, data_cmd->mrq);
> return;
> }
> @@ -3370,23 +3383,29 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
>
> pr_err("%s: Got data interrupt 0x%08x even though no data operation was in progress.\n",
> mmc_hostname(host->mmc), (unsigned)intmask);
> + sdhci_err_stats_inc(host, UNEXPECTED_IRQ);
> sdhci_dumpregs(host);
>
> return;
> }
>
> - if (intmask & SDHCI_INT_DATA_TIMEOUT)
> + if (intmask & SDHCI_INT_DATA_TIMEOUT) {
> host->data->error = -ETIMEDOUT;
> - else if (intmask & SDHCI_INT_DATA_END_BIT)
> + sdhci_err_stats_inc(host, DAT_TIMEOUT);
> + } else if (intmask & SDHCI_INT_DATA_END_BIT)
> host->data->error = -EILSEQ;
Seems to be missing here:
sdhci_err_stats_inc(host, DAT_CRC);
Also it would be nice to have braces {} on all arms of if-else-if
Can use checkpatch.pl --strict to see where
> else if ((intmask & SDHCI_INT_DATA_CRC) &&
> SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))
> - != MMC_BUS_TEST_R)
> + != MMC_BUS_TEST_R) {
> host->data->error = -EILSEQ;
> + if (!mmc_op_tuning(host->cmd->opcode))
> + sdhci_err_stats_inc(host, DAT_CRC);
> + }
> else if (intmask & SDHCI_INT_ADMA_ERROR) {
> pr_err("%s: ADMA error: 0x%08x\n", mmc_hostname(host->mmc),
> intmask);
> sdhci_adma_show_error(host);
> + sdhci_err_stats_inc(host, ADMA);
> host->data->error = -EIO;
> if (host->ops->adma_workaround)
> host->ops->adma_workaround(host, intmask);
> @@ -3584,6 +3603,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
> if (unexpected) {
> pr_err("%s: Unexpected interrupt 0x%08x.\n",
> mmc_hostname(host->mmc), unexpected);
> + sdhci_err_stats_inc(host, UNEXPECTED_IRQ);
> sdhci_dumpregs(host);
> }
>
> @@ -3905,20 +3925,27 @@ bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
> if (!host->cqe_on)
> return false;
>
> - if (intmask & (SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC))
> + if (intmask & (SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC)) {
> *cmd_error = -EILSEQ;
> - else if (intmask & SDHCI_INT_TIMEOUT)
> + if (!mmc_op_tuning(host->cmd->opcode))
> + sdhci_err_stats_inc(host, CMD_CRC);
> + } else if (intmask & SDHCI_INT_TIMEOUT) {
> *cmd_error = -ETIMEDOUT;
> - else
> + sdhci_err_stats_inc(host, CMD_TIMEOUT);
> + } else
> *cmd_error = 0;
>
> - if (intmask & (SDHCI_INT_DATA_END_BIT | SDHCI_INT_DATA_CRC))
> + if (intmask & (SDHCI_INT_DATA_END_BIT | SDHCI_INT_DATA_CRC)) {
> *data_error = -EILSEQ;
> - else if (intmask & SDHCI_INT_DATA_TIMEOUT)
> + if (!mmc_op_tuning(host->cmd->opcode))
> + sdhci_err_stats_inc(host, DAT_CRC);
> + } else if (intmask & SDHCI_INT_DATA_TIMEOUT) {
> *data_error = -ETIMEDOUT;
> - else if (intmask & SDHCI_INT_ADMA_ERROR)
> + sdhci_err_stats_inc(host, DAT_TIMEOUT);
> + } else if (intmask & SDHCI_INT_ADMA_ERROR) {
> *data_error = -EIO;
> - else
> + sdhci_err_stats_inc(host, ADMA);
> + } else
> *data_error = 0;
>
> /* Clear selected interrupts. */
> @@ -3934,6 +3961,7 @@ bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
> sdhci_writel(host, intmask, SDHCI_INT_STATUS);
> pr_err("%s: CQE: Unexpected interrupt 0x%08x.\n",
> mmc_hostname(host->mmc), intmask);
> + sdhci_err_stats_inc(host, UNEXPECTED_IRQ);
> sdhci_dumpregs(host);
> }
>
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index d7929d7..95a08f0 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -356,6 +356,9 @@ struct sdhci_adma2_64_desc {
> */
> #define MMC_CMD_TRANSFER_TIME (10 * NSEC_PER_MSEC) /* max 10 ms */
>
> +#define sdhci_err_stats_inc(host, err_name) \
> + mmc_debugfs_err_stats_inc((host)->mmc, MMC_ERR_##err_name)
> +
> enum sdhci_cookie {
> COOKIE_UNMAPPED,
> COOKIE_PRE_MAPPED, /* mapped by sdhci_pre_req() */
> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
> index d9a65c6..9c50bc4 100644
> --- a/include/linux/mmc/mmc.h
> +++ b/include/linux/mmc/mmc.h
> @@ -99,6 +99,12 @@ static inline bool mmc_op_multi(u32 opcode)
> opcode == MMC_READ_MULTIPLE_BLOCK;
> }
>
> +static inline bool mmc_op_tuning(u32 opcode)
> +{
> + return opcode == MMC_SEND_TUNING_BLOCK ||
> + opcode == MMC_SEND_TUNING_BLOCK_HS200;
> +}
> +
> /*
> * MMC_SWITCH argument format:
> *
There does not seem to be any:
sdhci_err_stats_inc(host, TUNING);
MMC_ERR_TUNING does not seem to get used.
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