[PATCH V3 1/4] mmc: sdhci: Capture eMMC and SD card errors
From: Shaik Sajida Bhanu
Date: Thu Jan 20 2022 - 12:28:26 EST
Add changes to capture eMMC and SD card errors.
This is useful for debug and testing.
Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@xxxxxxxxxxx>
Signed-off-by: Liangliang Lu <luliang@xxxxxxxxxxxxxx>
Signed-off-by: Sayali Lokhande <sayalil@xxxxxxxxxxxxxx>
Signed-off-by: Bao D. Nguyen <nguyenb@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-msm.c | 3 ++
drivers/mmc/host/sdhci.c | 72 ++++++++++++++++++++++++++++++++++++--------
include/linux/mmc/host.h | 31 +++++++++++++++++++
3 files changed, 94 insertions(+), 12 deletions(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 50c71e0..309eb7b 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -128,6 +128,8 @@
#define MSM_MMC_AUTOSUSPEND_DELAY_MS 50
+#define MSM_MMC_ERR_STATS_ENABLE 1
+
/* Timeout value to avoid infinite waiting for pwr_irq */
#define MSM_PWR_IRQ_TIMEOUT_MS 5000
@@ -2734,6 +2736,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
if (ret)
goto pm_runtime_disable;
+ host->mmc->err_stats_enabled = MSM_MMC_ERR_STATS_ENABLE;
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..74b356e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -113,6 +113,8 @@ void sdhci_dumpregs(struct sdhci_host *host)
if (host->ops->dump_vendor_regs)
host->ops->dump_vendor_regs(host);
+ if (host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_enable(host->mmc);
SDHCI_DUMP("============================================\n");
}
EXPORT_SYMBOL_GPL(sdhci_dumpregs);
@@ -3159,6 +3161,8 @@ 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->mmc && host->mmc->err_stats_enabled)
+ 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));
sdhci_dumpregs(host);
@@ -3181,6 +3185,8 @@ 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->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_REQ_TIMEOUT);
pr_err("%s: Timeout waiting for hardware interrupt.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
@@ -3240,11 +3246,18 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
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
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_CMD_TIMEOUT);
+ } else {
host->cmd->error = -EILSEQ;
-
+ if (host->cmd->opcode != MMC_SEND_TUNING_BLOCK ||
+ host->cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) {
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_CMD_CRC);
+ }
+ }
/* Treat data command CRC error the same as data CRC error */
if (host->cmd->data &&
(intmask & (SDHCI_INT_CRC | SDHCI_INT_TIMEOUT)) ==
@@ -3265,6 +3278,8 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
int err = (auto_cmd_status & SDHCI_AUTO_CMD_TIMEOUT) ?
-ETIMEDOUT :
-EILSEQ;
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_AUTO_CMD);
if (sdhci_auto_cmd23(host, mrq)) {
mrq->sbc->error = err;
@@ -3342,6 +3357,8 @@ 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;
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_CMD_TIMEOUT);
__sdhci_finish_mrq(host, data_cmd->mrq);
return;
}
@@ -3375,18 +3392,29 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
return;
}
- if (intmask & SDHCI_INT_DATA_TIMEOUT)
+ if (intmask & SDHCI_INT_DATA_TIMEOUT) {
host->data->error = -ETIMEDOUT;
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_DAT_TIMEOUT);
+ }
else if (intmask & SDHCI_INT_DATA_END_BIT)
host->data->error = -EILSEQ;
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 (host->cmd->opcode != MMC_SEND_TUNING_BLOCK ||
+ host->cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) {
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_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);
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_ADMA);
host->data->error = -EIO;
if (host->ops->adma_workaround)
host->ops->adma_workaround(host, intmask);
@@ -3905,20 +3933,40 @@ 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 (intmask & SDHCI_INT_CRC) {
+ if (host->cmd->opcode != MMC_SEND_TUNING_BLOCK ||
+ host->cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) {
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_CMD_CRC);
+ }
+ }
+ } else if (intmask & SDHCI_INT_TIMEOUT) {
*cmd_error = -ETIMEDOUT;
- else
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_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 (intmask & SDHCI_INT_DATA_CRC) {
+ if (host->cmd->opcode != MMC_SEND_TUNING_BLOCK ||
+ host->cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) {
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_DAT_CRC);
+ }
+ }
+ } else if (intmask & SDHCI_INT_DATA_TIMEOUT) {
*data_error = -ETIMEDOUT;
- else if (intmask & SDHCI_INT_ADMA_ERROR)
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_DAT_TIMEOUT);
+ } else if (intmask & SDHCI_INT_ADMA_ERROR) {
*data_error = -EIO;
- else
+ if (host->mmc && host->mmc->err_stats_enabled)
+ mmc_debugfs_err_stats_inc(host->mmc, MMC_ERR_ADMA);
+ } else
*data_error = 0;
/* Clear selected interrupts. */
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 7afb57c..883b50b 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -93,6 +93,23 @@ struct mmc_clk_phase_map {
struct mmc_host;
+enum mmc_err_stat {
+ 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,
+};
+
struct mmc_host_ops {
/*
* It is optional for the host to implement pre_req and post_req in
@@ -500,6 +517,9 @@ struct mmc_host {
/* Host Software Queue support */
bool hsq_enabled;
+ u32 err_stats[MMC_ERR_MAX];
+ bool err_stats_enabled;
+ bool err_state;
unsigned long private[] ____cacheline_aligned;
};
@@ -635,6 +655,17 @@ static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
}
+static inline void mmc_debugfs_err_stats_enable(struct mmc_host *mmc)
+{
+ mmc->err_state = true;
+}
+
+static inline void mmc_debugfs_err_stats_inc(struct mmc_host *mmc,
+ enum mmc_err_stat stat) {
+
+ mmc->err_stats[stat] += 1;
+}
+
int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode);
int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation