[PATCH V7 2/4] mmc: sdhci: Capture eMMC and SD card errors
From: Shaik Sajida Bhanu
Date: Wed May 25 2022 - 08:29:20 EST
Add changes to capture eMMC and SD card errors.
This is useful for debug and testing.
Signed-off-by: Liangliang Lu <quic_luliang@xxxxxxxxxxx>
Signed-off-by: Sayali Lokhande <quic_sayalil@xxxxxxxxxxx>
Signed-off-by: Bao D. Nguyen <quic_nguyenb@xxxxxxxxxxx>
Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@xxxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 33 ++++++++++++++++++++++++++-------
drivers/mmc/host/sdhci.h | 3 +++
include/linux/mmc/mmc.h | 6 ++++++
3 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 4805566..95c1b39 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -183,6 +183,7 @@ void sdhci_reset(struct sdhci_host *host, u8 mask)
if (timeout == 0) {
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;
}
@@ -1093,6 +1094,7 @@ void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
if (timeout == 0) {
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;
sdhci_finish_mrq(host, cmd->mrq);
@@ -1363,6 +1365,7 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
if (timeout == 0) {
pr_err("%s: Internal clock never stabilised.\n",
mmc_hostname(host->mmc));
+ sdhci_err_stats_inc(host, CTRL_TIMEOUT);
sdhci_dumpregs(host);
return;
}
@@ -2362,6 +2365,7 @@ static void sdhci_timeout_timer(unsigned long data)
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;
@@ -2385,6 +2389,7 @@ static void sdhci_timeout_data_timer(unsigned long data)
(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) {
@@ -2421,16 +2426,21 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *mask)
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);
+ }
/*
* If this command initiates a data phase and a response
@@ -2524,6 +2534,7 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
if (data_cmd && (data_cmd->flags & MMC_RSP_BUSY)) {
if (intmask & SDHCI_INT_DATA_TIMEOUT) {
data_cmd->error = -ETIMEDOUT;
+ sdhci_err_stats_inc(host, CMD_TIMEOUT);
sdhci_finish_mrq(host, data_cmd->mrq);
return;
}
@@ -2551,22 +2562,29 @@ 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;
- else if ((intmask & SDHCI_INT_DATA_CRC) &&
+ if (!mmc_op_tuning(SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))))
+ sdhci_err_stats_inc(host, DAT_CRC);
+ } 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;
- else if (intmask & SDHCI_INT_ADMA_ERROR) {
+ if (!mmc_op_tuning(SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))))
+ sdhci_err_stats_inc(host, DAT_CRC);
+ } else if (intmask & SDHCI_INT_ADMA_ERROR) {
pr_err("%s: ADMA error\n", mmc_hostname(host->mmc));
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);
@@ -2720,6 +2738,7 @@ 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);
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c722cd2..492a350 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -321,6 +321,9 @@ struct sdhci_adma2_64_desc {
/* Allow for a a command request and a data request at the same time */
#define SDHCI_MAX_MRQS 2
+#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 c376209..2d66c89 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -90,6 +90,12 @@ 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:
*
--
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