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Commit b7313c18 authored by Gilad Broner's avatar Gilad Broner
Browse files

scsi: ufs: add PM QoS debug info 



Add debug-fs entry to show current state of UFS PM QoS.

Change-Id: Ic1ae582b5a657f332be8a6f8d3bbcc0434bdf3d3
Signed-off-by: default avatarGilad Broner <gbroner@codeaurora.org>
parent 3af19e24

drivers/scsi/ufs/ufs-qcom-debugfs.c

+44 −0
Original line number Diff line number Diff line
@@ -219,6 +219,39 @@ static const struct file_operations ufs_qcom_dbg_dbg_regs_desc = { 
	.read		= seq_read,

};



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

{

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

	unsigned long flags;

	int i;



	spin_lock_irqsave(host->hba->host->host_lock, flags);



	seq_printf(file, "enabled: %d\n", host->pm_qos.is_enabled);

	for (i = 0; i < host->pm_qos.num_groups && host->pm_qos.groups; i++)

		seq_printf(file,

			"CPU Group #%d(mask=0x%lx): active_reqs=%d, state=%d, latency=%d\n",

			i, host->pm_qos.groups[i].mask.bits[0],

			host->pm_qos.groups[i].active_reqs,

			host->pm_qos.groups[i].state,

			host->pm_qos.groups[i].latency_us);



	spin_unlock_irqrestore(host->hba->host->host_lock, flags);



	return 0;

}



static int ufs_qcom_dbg_pm_qos_open(struct inode *inode,

					      struct file *file)

{

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

}



static const struct file_operations ufs_qcom_dbg_pm_qos_desc = {

	.open		= ufs_qcom_dbg_pm_qos_open,

	.read		= seq_read,

};



void ufs_qcom_dbg_add_debugfs(struct ufs_hba *hba, struct dentry *root)

{

	struct ufs_qcom_host *host;
@@ -307,6 +340,17 @@ void ufs_qcom_dbg_add_debugfs(struct ufs_hba *hba, struct dentry *root) 
		goto err;

	}



	host->debugfs_files.pm_qos =

		debugfs_create_file("pm_qos", S_IRUSR,

				host->debugfs_files.debugfs_root, host,

				&ufs_qcom_dbg_pm_qos_desc);

		if (!host->debugfs_files.dbg_regs) {

			dev_err(host->hba->dev,

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

				__func__);

			goto err;

		}



	return;



err:

drivers/scsi/ufs/ufs-qcom.h

+1 −0
Original line number Diff line number Diff line
@@ -227,6 +227,7 @@ struct qcom_debugfs_files { 
	struct dentry *testbus_cfg;

	struct dentry *testbus_bus;

	struct dentry *dbg_regs;

	struct dentry *pm_qos;

};

#endif