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Date: Mon, 9 May 2022 15:04:50 +0530
From: "Sajida Bhanu (Temp)" <quic_c_sbhanu@...cinc.com>
To: Adrian Hunter <adrian.hunter@...el.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
Hi,
Thank you for the review.
Please find the review comments.
Thanks,
Sajida
On 4/26/2022 1:21 PM, Adrian Hunter wrote:
> 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.
Thank you
>
>> ---
>> 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
Sure Thank you
>
>> 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.
Yes... Thank you for pointing.
We need to update this, will update this in patch set.
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