Commit 7ae20fa3 authored by Shaik Sajida Bhanu's avatar Shaik Sajida Bhanu Committed by Ulf Hansson
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mmc: debugfs: Add debug fs entry for mmc driver 



Add debug fs entry to query eMMC and SD card errors statistics

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 avatarShaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1653674036-21829-4-git-send-email-quic_c_sbhanu@quicinc.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent efe8f5c9

drivers/mmc/core/debugfs.c

+56 −0
Original line number Diff line number Diff line
@@ -223,6 +223,59 @@ static int mmc_clock_opt_set(void *data, u64 val) 
DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,

	"%llu\n");



static int mmc_err_stats_show(struct seq_file *file, void *data)

{

	struct mmc_host *host = (struct mmc_host *)file->private;

	const char *desc[MMC_ERR_MAX] = {

		[MMC_ERR_CMD_TIMEOUT] = "Command Timeout Occurred",

		[MMC_ERR_CMD_CRC] = "Command CRC Errors Occurred",

		[MMC_ERR_DAT_TIMEOUT] = "Data Timeout Occurred",

		[MMC_ERR_DAT_CRC] = "Data CRC Errors Occurred",

		[MMC_ERR_AUTO_CMD] = "Auto-Cmd Error Occurred",

		[MMC_ERR_ADMA] = "ADMA Error Occurred",

		[MMC_ERR_TUNING] = "Tuning Error Occurred",

		[MMC_ERR_CMDQ_RED] = "CMDQ RED Errors",

		[MMC_ERR_CMDQ_GCE] = "CMDQ GCE Errors",

		[MMC_ERR_CMDQ_ICCE] = "CMDQ ICCE Errors",

		[MMC_ERR_REQ_TIMEOUT] = "Request Timedout",

		[MMC_ERR_CMDQ_REQ_TIMEOUT] = "CMDQ Request Timedout",

		[MMC_ERR_ICE_CFG] = "ICE Config Errors",

		[MMC_ERR_CTRL_TIMEOUT] = "Controller Timedout errors",

		[MMC_ERR_UNEXPECTED_IRQ] = "Unexpected IRQ errors",

	};

	int i;



	for (i = 0; i < MMC_ERR_MAX; i++) {

		if (desc[i])

			seq_printf(file, "# %s:\t %d\n",

					desc[i], host->err_stats[i]);

	}



	return 0;

}



static int mmc_err_stats_open(struct inode *inode, struct file *file)

{

	return single_open(file, mmc_err_stats_show, inode->i_private);

}



static ssize_t mmc_err_stats_write(struct file *filp, const char __user *ubuf,

				   size_t cnt, loff_t *ppos)

{

	struct mmc_host *host = filp->f_mapping->host->i_private;



	pr_debug("%s: Resetting MMC error statistics\n", __func__);

	memset(host->err_stats, 0, sizeof(host->err_stats));



	return cnt;

}



static const struct file_operations mmc_err_stats_fops = {

	.open	= mmc_err_stats_open,

	.read	= seq_read,

	.write	= mmc_err_stats_write,

};



void mmc_add_host_debugfs(struct mmc_host *host)

{

	struct dentry *root;
@@ -236,6 +289,9 @@ void mmc_add_host_debugfs(struct mmc_host *host) 
	debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host,

				   &mmc_clock_fops);



	debugfs_create_file("err_stats", 0600, root, host,

			    &mmc_err_stats_fops);



#ifdef CONFIG_FAIL_MMC_REQUEST

	if (fail_request)

		setup_fault_attr(&fail_default_attr, fail_request);