Commit 91f059c9 authored by Shaik Sajida Bhanu's avatar Shaik Sajida Bhanu Committed by Ulf Hansson
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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: default avatarLiangliang Lu <quic_luliang@quicinc.com>
Signed-off-by: default avatarSayali Lokhande <quic_sayalil@quicinc.com>
Signed-off-by: default avatarBao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: default avatarRam Prakash Gupta <quic_rampraka@quicinc.com>
Signed-off-by: default avatarShaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
Acked-by: default avatarAdrian 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: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent f0c88b04

drivers/mmc/core/core.c

+9 −1
Original line number Diff line number Diff line
@@ -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:

include/linux/mmc/host.h

+26 −0
Original line number Diff line number Diff line
@@ -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);