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Date: Sat, 12 Mar 2022 18:15:36 +0000
From: "Sajida Bhanu (Temp) (QUIC)" <quic_c_sbhanu@...cinc.com>
To: Adrian Hunter <adrian.hunter@...el.com>,
"Sajida Bhanu (Temp) (QUIC)" <quic_c_sbhanu@...cinc.com>,
"Asutosh Das (asd)" <asutoshd@...cinc.com>,
"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
"agross@...nel.org" <agross@...nel.org>,
"bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "Veerabhadrarao Badiganti (QUIC)" <quic_vbadigan@...cinc.com>,
"Ram Prakash Gupta (QUIC)" <quic_rampraka@...cinc.com>,
"Pradeep Pragallapati (QUIC)" <quic_pragalla@...cinc.com>,
"Sarthak Garg (QUIC)" <quic_sartgarg@...cinc.com>,
"Nitin Rawat (QUIC)" <quic_nitirawa@...cinc.com>,
"Sayali Lokhande (QUIC)" <quic_sayalil@...cinc.com>,
Sayali Lokhande <sayalil@...eaurora.org>,
"Bao D . Nguyen" <nguyenb@...eaurora.org>
Subject: RE: [PATCH V4 6/7] mmc: sdhci: Set error state for mmc driver
Hi,
Thanks for the review.
Please find the inline comments.
Thanks,
Sajida
> -----Original Message-----
> From: Adrian Hunter <adrian.hunter@...el.com>
> Sent: Tuesday, March 8, 2022 3:36 PM
> To: Sajida Bhanu (Temp) (QUIC) <quic_c_sbhanu@...cinc.com>; Asutosh
> Das (asd) <asutoshd@...cinc.com>; ulf.hansson@...aro.org;
> agross@...nel.org; bjorn.andersson@...aro.org; linux-
> mmc@...r.kernel.org; linux-arm-msm@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Cc: Veerabhadrarao Badiganti (QUIC) <quic_vbadigan@...cinc.com>; Ram
> Prakash Gupta (QUIC) <quic_rampraka@...cinc.com>; Pradeep Pragallapati
> (QUIC) <quic_pragalla@...cinc.com>; Sarthak Garg (QUIC)
> <quic_sartgarg@...cinc.com>; Nitin Rawat (QUIC)
> <quic_nitirawa@...cinc.com>; Sayali Lokhande (QUIC)
> <quic_sayalil@...cinc.com>; Sayali Lokhande <sayalil@...eaurora.org>; Bao
> D . Nguyen <nguyenb@...eaurora.org>
> Subject: Re: [PATCH V4 6/7] mmc: sdhci: Set error state for mmc driver
>
> On 2.3.2022 15.03, Shaik Sajida Bhanu wrote:
> > Set error state if any errors observed in eMMC and SD card driver level.
> >
> > Signed-off-by: Liangliang Lu <luliang@...eaurora.org>
> > Signed-off-by: Sayali Lokhande <sayalil@...eaurora.org>
> > Signed-off-by: Bao D. Nguyen <nguyenb@...eaurora.org>
> > Signed-off-by: Ram Prakash Gupta <quic_rampraka@...cinc.com>
> > Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@...cinc.com>
> > ---
> > drivers/mmc/host/sdhci.c | 22 ++++++++++++++++++++++
> > 1 file changed, 22 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index
> > 741fb06..4ba3797 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -224,6 +224,8 @@ 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);
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host-
> >mmc);
>
> I really do not understand why this cannot be another err_stats entry such as
> MMC_ERR_DRIVER and then as below?
>
> sdhci_err_stats_inc(host, DRIVER);
>
>
Hi,
err_stats having all the error types.
err_state is not the error type, if err_state set means some errors occurred in driver and we will go and check err_stats to know exact error.
Thanks,
Sajida
> > sdhci_dumpregs(host);
> > return;
> > }
> > @@ -1716,6 +1718,8 @@ 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));
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host-
> >mmc);
> > sdhci_dumpregs(host);
> > cmd->error = -EIO;
> > return false;
> > @@ -1965,6 +1969,8 @@ void sdhci_enable_clk(struct sdhci_host *host,
> u16 clk)
> > if (timedout) {
> > pr_err("%s: Internal clock never stabilised.\n",
> > mmc_hostname(host->mmc));
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host-
> >mmc);
> > sdhci_dumpregs(host);
> > return;
> > }
> > @@ -1987,6 +1993,8 @@ void sdhci_enable_clk(struct sdhci_host *host,
> u16 clk)
> > if (timedout) {
> > pr_err("%s: PLL clock never stabilised.\n",
> > mmc_hostname(host->mmc));
> > + if (host->mmc && !host->mmc->err_state)
> > +
> mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> > return;
> > }
> > @@ -3162,6 +3170,8 @@ static void sdhci_timeout_timer(struct timer_list
> *t)
> > mmc_debugfs_err_stats_inc(host->mmc,
> MMC_ERR_REQ_TIMEOUT);
> > pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
> > mmc_hostname(host->mmc));
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> >
> > host->cmd->error = -ETIMEDOUT;
> > @@ -3185,6 +3195,8 @@ static void sdhci_timeout_data_timer(struct
> timer_list *t)
> > mmc_debugfs_err_stats_inc(host->mmc,
> MMC_ERR_REQ_TIMEOUT);
> > pr_err("%s: Timeout waiting for hardware interrupt.\n",
> > mmc_hostname(host->mmc));
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> >
> > if (host->data) {
> > @@ -3236,6 +3248,8 @@ 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);
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> > return;
> > }
> > @@ -3289,6 +3303,8 @@ static void sdhci_adma_show_error(struct
> sdhci_host *host)
> > void *desc = host->adma_table;
> > dma_addr_t dma = host->adma_addr;
> >
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> >
> > while (true) {
> > @@ -3378,6 +3394,8 @@ 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);
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> >
> > return;
> > @@ -3599,6 +3617,8 @@ 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);
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> > }
> >
> > @@ -3962,6 +3982,8 @@ 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);
> > + if (host->mmc && !host->mmc->err_state)
> > + mmc_debugfs_err_stats_enable(host->mmc);
> > sdhci_dumpregs(host);
> > }
> >
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