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mmc: core: Capture eMMC and SD card errors 

Add changes to capture eMMC and SD card errors.
This is useful for debug and testing.

Signed-off-by: Liangliang Lu <quic_luliang@quicinc.com>
Signed-off-by: Sayali Lokhande <quic_sayalil@quicinc.com>
Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: Ram Prakash Gupta <quic_rampraka@quicinc.com>
Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1653674036-21829-2-git-send-email-quic_c_sbhanu@quicinc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shaik Sajida Bhanu 2022-05-27 23:23:52 +05:30 committed by Ulf Hansson
parent f0c88b04f3
commit 91f059c95c
2 changed files with 35 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/mmc/core/core.c
View File

@ -943,9 +943,11 @@ int mmc_execute_tuning(struct mmc_card *card)
}
/* Only print error when we don't check for card removal */
if (!host->detect_change)
if (!host->detect_change) {
pr_err("%s: tuning execution failed: %d\n",
mmc_hostname(host), err);
mmc_debugfs_err_stats_inc(host, MMC_ERR_TUNING);
}
return err;
}
@ -2244,6 +2246,12 @@ void mmc_rescan(struct work_struct *work)
if (freqs[i] <= host->f_min)
break;
}
/*
* Ignore the command timeout errors observed during
* the card init as those are excepted.
*/
host->err_stats[MMC_ERR_CMD_TIMEOUT] = 0;
mmc_release_host(host);
out:

26
include/linux/mmc/host.h
View File

@ -93,6 +93,25 @@ 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_CTRL_TIMEOUT,
MMC_ERR_UNEXPECTED_IRQ,
MMC_ERR_MAX,
};
struct mmc_host_ops {
/*
* It is optional for the host to implement pre_req and post_req in
@ -501,6 +520,7 @@ struct mmc_host {
/* Host Software Queue support */
bool hsq_enabled;
u32 err_stats[MMC_ERR_MAX];
unsigned long private[] ____cacheline_aligned;
};
@ -635,6 +655,12 @@ 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_inc(struct mmc_host *host,
enum mmc_err_stat stat)
{
host->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);