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Commit 6f270ddf authored by Subhash Jadavani's avatar Subhash Jadavani Committed by David Keitel
Browse files

scsi: ufs: debugfs: add option to read local DME attribute 



This patch adds the debugfs capability to read the DME attribute of
local UniPro/M-PHY. This should help for debugging.

Change-Id: I2dea471f6bcf591a69206e127d3c9e3febbbc68f
Signed-off-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
parent 279f4d7c

drivers/scsi/ufs/debugfs.c

+49 −0
Original line number Original line Diff line number Diff line
@@ -725,6 +725,44 @@ static const struct file_operations ufsdbg_power_mode_desc = { 
	.write		= ufsdbg_power_mode_write,

	.write		= ufsdbg_power_mode_write,

};

};





static int ufsdbg_dme_local_read(void *data, u64 *attr_val)

{

	int ret;

	struct ufs_hba *hba = data;

	u32 read_val = 0;



	if (!hba)

		return -EINVAL;



	pm_runtime_get_sync(hba->dev);

	ret = ufshcd_dme_get(hba,

			UIC_ARG_MIB(hba->debugfs_files.dme_local_attr_id),

			&read_val);

	pm_runtime_put_sync(hba->dev);



	if (!ret)

		*attr_val = (u64)read_val;



	return ret;

}



static int ufsdbg_dme_local_set_attr_id(void *data, u64 attr_id)

{

	struct ufs_hba *hba = data;



	if (!hba)

		return -EINVAL;



	hba->debugfs_files.dme_local_attr_id = (u32)attr_id;



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(ufsdbg_dme_local_read_ops,

			ufsdbg_dme_local_read,

			ufsdbg_dme_local_set_attr_id,

			"%llu\n");



void ufsdbg_add_debugfs(struct ufs_hba *hba)

void ufsdbg_add_debugfs(struct ufs_hba *hba)

{

{

	if (!hba) {

	if (!hba) {
@@ -808,6 +846,17 @@ void ufsdbg_add_debugfs(struct ufs_hba *hba) 
		goto err;

		goto err;

	}

	}





	hba->debugfs_files.dme_local_read =

		debugfs_create_file("dme_local_read", S_IRUSR | S_IWUSR,

				    hba->debugfs_files.debugfs_root, hba,

				    &ufsdbg_dme_local_read_ops);

	if (!hba->debugfs_files.dme_local_read) {

		dev_err(hba->dev,

			"%s:  failed create dme_local_read debugfs entry\n",

			__func__);

		goto err;

	}



	ufsdbg_setup_fault_injection(hba);

	ufsdbg_setup_fault_injection(hba);





	return;

	return;

include/linux/scsi/ufs/ufshcd.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -377,6 +377,8 @@ struct debugfs_files { 
	struct dentry *host_regs;

	struct dentry *host_regs;

	struct dentry *dump_dev_desc;

	struct dentry *dump_dev_desc;

	struct dentry *power_mode;

	struct dentry *power_mode;

	struct dentry *dme_local_read;

	u32 dme_local_attr_id;

#ifdef CONFIG_UFS_FAULT_INJECTION

#ifdef CONFIG_UFS_FAULT_INJECTION

	struct fault_attr fail_attr;

	struct fault_attr fail_attr;

#endif

#endif