1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-debugfs.c b/drivers/scsi/ufs/ufs-debugfs.c
new file mode 100644
index 000000000000..dee98dc72d29
--- /dev/null
+++ b/drivers/scsi/ufs/ufs-debugfs.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2020 Intel Corporation
+
+#include <linux/debugfs.h>
+
+#include "ufs-debugfs.h"
+#include "ufshcd.h"
+
+static struct dentry *ufs_debugfs_root;
+
+void __init ufs_debugfs_init(void)
+{
+	ufs_debugfs_root = debugfs_create_dir("ufshcd", NULL);
+}
+
+void __exit ufs_debugfs_exit(void)
+{
+	debugfs_remove_recursive(ufs_debugfs_root);
+}
+
+static int ufs_debugfs_stats_show(struct seq_file *s, void *data)
+{
+	struct ufs_hba *hba = s->private;
+	struct ufs_event_hist *e = hba->ufs_stats.event;
+
+#define PRT(fmt, typ) \
+	seq_printf(s, fmt, e[UFS_EVT_ ## typ].cnt)
+
+	PRT("PHY Adapter Layer errors (except LINERESET): %llu\n", PA_ERR);
+	PRT("Data Link Layer errors: %llu\n", DL_ERR);
+	PRT("Network Layer errors: %llu\n", NL_ERR);
+	PRT("Transport Layer errors: %llu\n", TL_ERR);
+	PRT("Generic DME errors: %llu\n", DME_ERR);
+	PRT("Auto-hibernate errors: %llu\n", AUTO_HIBERN8_ERR);
+	PRT("IS Fatal errors (CEFES, SBFES, HCFES, DFES): %llu\n", FATAL_ERR);
+	PRT("DME Link Startup errors: %llu\n", LINK_STARTUP_FAIL);
+	PRT("PM Resume errors: %llu\n", RESUME_ERR);
+	PRT("PM Suspend errors : %llu\n", SUSPEND_ERR);
+	PRT("Logical Unit Resets: %llu\n", DEV_RESET);
+	PRT("Host Resets: %llu\n", HOST_RESET);
+	PRT("SCSI command aborts: %llu\n", ABORT);
+#undef PRT
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(ufs_debugfs_stats);
+
+void ufs_debugfs_hba_init(struct ufs_hba *hba)
+{
+	hba->debugfs_root = debugfs_create_dir(dev_name(hba->dev), ufs_debugfs_root);
+	debugfs_create_file("stats", 0400, hba->debugfs_root, hba, &ufs_debugfs_stats_fops);
+}
+
+void ufs_debugfs_hba_exit(struct ufs_hba *hba)
+{
+	debugfs_remove_recursive(hba->debugfs_root);
+}