Merge "scsi: ufs: expose driver run time data and hci regs via debugfs" (923f2a35) · Commits · e / devices / android_kernel_sony_msm8994

drivers/scsi/ufs/debugfs.c

+95 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,8 @@

		#include "debugfs.h"

		#define BUFF_LINE_CAPACITY 16

		static int ufsdbg_tag_stats_show(struct seq_file file, void data)
		{
		struct ufs_hba hba = (struct ufs_hba )file->private;
		@@ -130,6 +132,83 @@ exit:
		return ret;
		}

		static void
		ufsdbg_pr_buf_to_std(struct seq_file file, void buff, int size, char *str)
		{
		int i;
		char linebuf[38];
		int lines = size/BUFF_LINE_CAPACITY +
		(size % BUFF_LINE_CAPACITY ? 1 : 0);

		for (i = 0; i < lines; i++) {
		hex_dump_to_buffer(buff + i * BUFF_LINE_CAPACITY,
		BUFF_LINE_CAPACITY, BUFF_LINE_CAPACITY, 4,
		linebuf, sizeof(linebuf), false);
		seq_printf(file, "%s [%x]: %s\n", str, i * BUFF_LINE_CAPACITY,
		linebuf);
		}
		}

		static int ufsdbg_host_regs_show(struct seq_file file, void data)
		{
		struct ufs_hba hba = (struct ufs_hba )file->private;

		ufsdbg_pr_buf_to_std(file, hba->mmio_base, UFSHCI_REG_SPACE_SIZE,
		"host regs");
		return 0;
		}

		static int ufsdbg_host_regs_open(struct inode inode, struct file file)
		{
		return single_open(file, ufsdbg_host_regs_show, inode->i_private);
		}

		static const struct file_operations ufsdbg_host_regs_fops = {
		.open = ufsdbg_host_regs_open,
		.read = seq_read,
		};

		static int ufsdbg_show_hba_show(struct seq_file file, void data)
		{
		struct ufs_hba hba = (struct ufs_hba )file->private;

		seq_printf(file, "hba->outstanding_tasks = 0x%x\n",
		(u32)hba->outstanding_tasks);
		seq_printf(file, "hba->outstanding_reqs = 0x%x\n",
		(u32)hba->outstanding_reqs);

		seq_printf(file, "hba->capabilities = 0x%x\n", hba->capabilities);
		seq_printf(file, "hba->nutrs = %d\n", hba->nutrs);
		seq_printf(file, "hba->nutmrs = %d\n", hba->nutmrs);
		seq_printf(file, "hba->ufs_version = 0x%x\n", hba->ufs_version);
		seq_printf(file, "hba->irq = 0x%x\n", hba->irq);
		seq_printf(file, "hba->auto_bkops_enabled = %d\n",
		hba->auto_bkops_enabled);

		seq_printf(file, "hba->ufshcd_state = 0x%x\n", hba->ufshcd_state);
		seq_printf(file, "hba->eh_flags = 0x%x\n", hba->eh_flags);
		seq_printf(file, "hba->intr_mask = 0x%x\n", hba->intr_mask);
		seq_printf(file, "hba->ee_ctrl_mask = 0x%x\n", hba->ee_ctrl_mask);

		/* HBA Errors */
		seq_printf(file, "hba->errors = 0x%x\n", hba->errors);
		seq_printf(file, "hba->uic_error = 0x%x\n", hba->uic_error);
		seq_printf(file, "hba->saved_err = 0x%x\n", hba->saved_err);
		seq_printf(file, "hba->saved_uic_err = 0x%x\n", hba->saved_uic_err);

		return 0;
		}

		static int ufsdbg_show_hba_open(struct inode inode, struct file file)
		{
		return single_open(file, ufsdbg_show_hba_show, inode->i_private);
		}

		static const struct file_operations ufsdbg_show_hba_fops = {
		.open = ufsdbg_show_hba_open,
		.read = seq_read,
		};

		void ufsdbg_add_debugfs(struct ufs_hba *hba)
		{
		if (!hba) {
		@@ -167,6 +246,22 @@ void ufsdbg_add_debugfs(struct ufs_hba *hba)
		goto err;
		}

		hba->debugfs_files.host_regs = debugfs_create_file("host_regs", S_IRUSR,
		hba->debugfs_files.debugfs_root, hba,
		&ufsdbg_host_regs_fops);
		if (!hba->debugfs_files.host_regs) {
		dev_err(hba->dev, "%s: NULL hcd regs file, exiting", __func__);
		goto err;
		}

		hba->debugfs_files.show_hba = debugfs_create_file("show_hba", S_IRUSR,
		hba->debugfs_files.debugfs_root, hba,
		&ufsdbg_show_hba_fops);
		if (!hba->debugfs_files.show_hba) {
		dev_err(hba->dev, "%s: NULL hba file, exiting", __func__);
		goto err;
		}

		return;

		err:

drivers/scsi/ufs/ufshcd.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -210,6 +210,8 @@ struct ufs_stats {
		struct debugfs_files {
		struct dentry *debugfs_root;
		struct dentry *tag_stats;
		struct dentry *show_hba;
		struct dentry *host_regs;
		};
		#endif