On 2.3.2022 15.03, Shaik Sajida Bhanu wrote:
> 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: Ram Prakash Gupta <quic_rampraka@xxxxxxxxxxx>
> Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@xxxxxxxxxxx>
> ---
> drivers/mmc/core/core.c | 6 ++++++
> include/linux/mmc/host.h | 23 +++++++++++++++++++++++
> 2 files changed, 29 insertions(+)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 368f104..f3679ed 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -2242,6 +2242,12 @@ 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:
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 7afb57c..3b7f1e5 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 +517,7 @@ struct mmc_host {
>
> /* Host Software Queue support */
> bool hsq_enabled;
> + u32 err_stats[MMC_ERR_MAX];
This makes it look like err_stats has something to do with Host Software Queue.
Perhaps move it to be with debugfs_root. Also use tabs not spaces
struct dentry *debugfs_root;
u32 err_stats[MMC_ERR_MAX];
>
> unsigned long private[] ____cacheline_aligned;
> };
> @@ -635,6 +653,11 @@ 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);
