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SubjectRe: [PATCH V1] mmc: sdhci-msm: Add eMMC and SD card err_stat sysfs entry
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On 17/11/2021 08:20, Shaik Sajida Bhanu wrote:
> Add sysfs entry to query eMMC and SD card errors statistics.
> This feature is useful for debug and testing.

Did you consider making it part of cqhci.c so that all drivers using
cqhci could benefit?

>
> Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
> ---
> drivers/mmc/host/cqhci.h | 1 +
> drivers/mmc/host/sdhci-msm.c | 192 +++++++++++++++++++++++++++++++++++++++++++
> drivers/mmc/host/sdhci.c | 17 ++++
> drivers/mmc/host/sdhci.h | 1 +
> include/linux/mmc/host.h | 1 +
> 5 files changed, 212 insertions(+)
>
> diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
> index ba9387e..f72a1d6 100644
> --- a/drivers/mmc/host/cqhci.h
> +++ b/drivers/mmc/host/cqhci.h
> @@ -286,6 +286,7 @@ struct cqhci_host_ops {
> u64 *data);
> void (*pre_enable)(struct mmc_host *mmc);
> void (*post_disable)(struct mmc_host *mmc);
> + void (*err_stats)(struct mmc_host *mmc, unsigned long flags);
> #ifdef CONFIG_MMC_CRYPTO
> int (*program_key)(struct cqhci_host *cq_host,
> const union cqhci_crypto_cfg_entry *cfg, int slot);
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 50c71e0..e1dcd2d 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -242,6 +242,23 @@ struct sdhci_msm_variant_ops {
> u32 offset);
> };
>
> +enum {
> + MMC_ERR_CMD_TIMEOUT,
> + MMC_ERR_CMD_CRC,
> + MMC_ERR_DAT_TIMEOUT,
> + MMC_ERR_DAT_CRC,
> + MMC_ERR_AUTO_CMD,
> + MMC_ERR_ADMA,
> + MMC_ERR_TUNING,
> + MMC_ERR_CMDQ_RED,
> + MMC_ERR_CMDQ_GCE,
> + MMC_ERR_CMDQ_ICCE,
> + MMC_ERR_REQ_TIMEOUT,
> + MMC_ERR_CMDQ_REQ_TIMEOUT,
> + MMC_ERR_ICE_CFG,
> + MMC_ERR_MAX,
> +};
> +
> /*
> * From V5, register spaces have changed. Wrap this info in a structure
> * and choose the data_structure based on version info mentioned in DT.
> @@ -285,6 +302,8 @@ struct sdhci_msm_host {
> u32 dll_config;
> u32 ddr_config;
> bool vqmmc_enabled;
> + bool err_occurred;
> + u32 err_stats[MMC_ERR_MAX];
> };
>
> static const struct sdhci_msm_offset *sdhci_priv_msm_offset(struct sdhci_host *host)
> @@ -2106,9 +2125,20 @@ static void sdhci_msm_set_timeout(struct sdhci_host *host, struct mmc_command *c
> host->data_timeout = 22LL * NSEC_PER_SEC;
> }
>
> +void sdhci_msm_cqe_err_stats(struct mmc_host *mmc, unsigned long flags)
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + if (flags & BIT(0))
> + msm_host->err_stats[MMC_ERR_CMDQ_REQ_TIMEOUT]++;
> +}
> +
> static const struct cqhci_host_ops sdhci_msm_cqhci_ops = {
> .enable = sdhci_msm_cqe_enable,
> .disable = sdhci_msm_cqe_disable,
> + .err_stats = sdhci_msm_cqe_err_stats,
> #ifdef CONFIG_MMC_CRYPTO
> .program_key = sdhci_msm_program_key,
> #endif
> @@ -2403,6 +2433,46 @@ static void sdhci_msm_dump_vendor_regs(struct sdhci_host *host)
> readl_relaxed(host->ioaddr +
> msm_offset->core_vendor_spec_func2),
> readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec3));
> + msm_host->err_occurred = true;
> +}
> +
> +void sdhci_msm_err_stats(struct sdhci_host *host, u32 intmask)
> +{
> + int command;
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + if (!msm_host->err_occurred)
> + msm_host->err_stats[MMC_ERR_CMD_TIMEOUT] = 0;
> +
> + if (host && host->mmc && host->mmc->timer) {
> + msm_host->err_stats[MMC_ERR_REQ_TIMEOUT]++;
> + host->mmc->timer = false;
> + }
> +
> + if (intmask & SDHCI_INT_CRC) {
> + command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
> + if (command != MMC_SEND_TUNING_BLOCK ||
> + command != MMC_SEND_TUNING_BLOCK_HS200)
> + msm_host->err_stats[MMC_ERR_CMD_CRC]++;
> + } else if ((intmask & SDHCI_INT_TIMEOUT) ||
> + (intmask & SDHCI_INT_DATA_TIMEOUT))
> + msm_host->err_stats[MMC_ERR_CMD_TIMEOUT]++;
> + else if (intmask & SDHCI_INT_DATA_CRC) {
> + command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
> + if (command != MMC_SEND_TUNING_BLOCK ||
> + command != MMC_SEND_TUNING_BLOCK_HS200)
> + msm_host->err_stats[MMC_ERR_DAT_CRC]++;
> + } else if (intmask & SDHCI_INT_DATA_TIMEOUT)
> + msm_host->err_stats[MMC_ERR_DAT_TIMEOUT]++;
> + else if (intmask & CQHCI_IS_RED)
> + msm_host->err_stats[MMC_ERR_CMDQ_RED]++;
> + else if (intmask & CQHCI_IS_GCE)
> + msm_host->err_stats[MMC_ERR_CMDQ_GCE]++;
> + else if (intmask & CQHCI_IS_ICCE)
> + msm_host->err_stats[MMC_ERR_CMDQ_ICCE]++;
> + else if (intmask & SDHCI_INT_ADMA_ERROR)
> + msm_host->err_stats[MMC_ERR_ADMA]++;
> }
>
> static const struct sdhci_msm_variant_ops mci_var_ops = {
> @@ -2456,6 +2526,7 @@ static const struct sdhci_ops sdhci_msm_ops = {
> .dump_vendor_regs = sdhci_msm_dump_vendor_regs,
> .set_power = sdhci_set_power_noreg,
> .set_timeout = sdhci_msm_set_timeout,
> + .err_stats = sdhci_msm_err_stats,
> };
>
> static const struct sdhci_pltfm_data sdhci_msm_pdata = {
> @@ -2482,6 +2553,125 @@ static inline void sdhci_msm_get_of_property(struct platform_device *pdev,
> of_property_read_u32(node, "qcom,dll-config", &msm_host->dll_config);
> }
>
> +static ssize_t err_state_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> +
> + if (!host || !host->mmc)
> + return -EINVAL;
> +
> + return scnprintf(buf, PAGE_SIZE, "%d\n", !!msm_host->err_occurred);
> +}
> +
> +static ssize_t err_state_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> + unsigned int val;
> +
> + if (kstrtouint(buf, 0, &val))
> + return -EINVAL;
> + if (!host || !host->mmc)
> + return -EINVAL;
> +
> + msm_host->err_occurred = !!val;
> + if (!val)
> + memset(msm_host->err_stats, 0, sizeof(msm_host->err_stats));
> +
> + return count;
> +}
> +static DEVICE_ATTR_RW(err_state);
> +
> +static ssize_t err_stats_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct sdhci_host *host = dev_get_drvdata(dev);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> + char tmp[100];
> +
> + if (!host || !host->mmc)
> + return -EINVAL;
> +
> + scnprintf(tmp, sizeof(tmp), "# Command Timeout Error: %d\n",
> + msm_host->err_stats[MMC_ERR_CMD_TIMEOUT]);
> + strlcpy(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Command CRC Error: %d\n",
> + msm_host->err_stats[MMC_ERR_CMD_CRC]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Data Timeout Error: %d\n",
> + msm_host->err_stats[MMC_ERR_DAT_TIMEOUT]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Data CRC Error: %d\n",
> + msm_host->err_stats[MMC_ERR_DAT_CRC]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Auto-Cmd Error: %d\n",
> + msm_host->err_stats[MMC_ERR_ADMA]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# ADMA Error: %d\n",
> + msm_host->err_stats[MMC_ERR_ADMA]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Tuning Error: %d\n",
> + msm_host->err_stats[MMC_ERR_TUNING]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# CMDQ RED Errors: %d\n",
> + msm_host->err_stats[MMC_ERR_CMDQ_RED]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# CMDQ GCE Errors: %d\n",
> + msm_host->err_stats[MMC_ERR_CMDQ_GCE]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# CMDQ ICCE Errors: %d\n",
> + msm_host->err_stats[MMC_ERR_CMDQ_ICCE]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# CMDQ Request Timedout: %d\n",
> + msm_host->err_stats[MMC_ERR_CMDQ_REQ_TIMEOUT]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + scnprintf(tmp, sizeof(tmp), "# Request Timedout Error: %d\n",
> + msm_host->err_stats[MMC_ERR_REQ_TIMEOUT]);
> + strlcat(buf, tmp, PAGE_SIZE);
> +
> + return strlen(buf);
> +}
> +static DEVICE_ATTR_RO(err_stats);
> +
> +static struct attribute *sdhci_msm_sysfs_attrs[] = {
> + &dev_attr_err_state.attr,
> + &dev_attr_err_stats.attr,
> + NULL
> +};
> +
> +static const struct attribute_group sdhci_msm_sysfs_group = {
> + .name = "qcom",
> + .attrs = sdhci_msm_sysfs_attrs,
> +};
> +
> +static int sdhci_msm_init_sysfs(struct platform_device *pdev)
> +{
> + int ret;
> +
> + ret = sysfs_create_group(&pdev->dev.kobj, &sdhci_msm_sysfs_group);
> + if (ret)
> + dev_err(&pdev->dev, "%s: Failed sdhci_msm sysfs group err=%d\n",
> + __func__, ret);
> + return ret;
> +}
>
> static int sdhci_msm_probe(struct platform_device *pdev)
> {
> @@ -2734,6 +2924,8 @@ static int sdhci_msm_probe(struct platform_device *pdev)
> if (ret)
> goto pm_runtime_disable;
>
> + sdhci_msm_init_sysfs(pdev);
> +
> pm_runtime_mark_last_busy(&pdev->dev);
> pm_runtime_put_autosuspend(&pdev->dev);
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 07c6da1..f82a3eff 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -3159,6 +3159,13 @@ static void sdhci_timeout_timer(struct timer_list *t)
> spin_lock_irqsave(&host->lock, flags);
>
> if (host->cmd && !sdhci_data_line_cmd(host->cmd)) {
> + if (host->ops->err_stats) {
> + u32 intmask;
> +
> + host->mmc->timer = true;
> + intmask = sdhci_readl(host, SDHCI_INT_STATUS);
> + host->ops->err_stats(host, intmask);
> + }
> pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
> mmc_hostname(host->mmc));
> sdhci_dumpregs(host);
> @@ -3181,6 +3188,13 @@ static void sdhci_timeout_data_timer(struct timer_list *t)
>
> if (host->data || host->data_cmd ||
> (host->cmd && sdhci_data_line_cmd(host->cmd))) {
> + if (host->ops->err_stats) {
> + u32 intmask;
> +
> + host->mmc->timer = true;
> + intmask = sdhci_readl(host, SDHCI_INT_STATUS);
> + host->ops->err_stats(host, intmask);
> + }
> pr_err("%s: Timeout waiting for hardware interrupt.\n",
> mmc_hostname(host->mmc));
> sdhci_dumpregs(host);
> @@ -3466,6 +3480,9 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
> }
>
> intmask = sdhci_readl(host, SDHCI_INT_STATUS);
> + if (host->ops->err_stats)
> + host->ops->err_stats(host, intmask);
> +
> if (!intmask || intmask == 0xffffffff) {
> result = IRQ_NONE;
> goto out;
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index d7929d7..a1546b3 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -658,6 +658,7 @@ struct sdhci_ops {
> void (*request_done)(struct sdhci_host *host,
> struct mmc_request *mrq);
> void (*dump_vendor_regs)(struct sdhci_host *host);
> + void (*err_stats)(struct sdhci_host *host, u32 intmask);
> };
>
> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 7afb57c..33186ff 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -492,6 +492,7 @@ struct mmc_host {
> int cqe_qdepth;
> bool cqe_enabled;
> bool cqe_on;
> + bool timer;
>
> /* Inline encryption support */
> #ifdef CONFIG_MMC_CRYPTO
>

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