From: Minwoo Im <minwoo.im.dev@gmail.com>
Date: Sun, 4 Aug 2019 16:50:49 +0900
Subject: [PATCH] nvme: trace: parse Get LBA Status command in detail
References: bsc#1156419,jsc#SLE-8281
Git-commit: 177b06ed0997bdaa9671c615a37649ab9aec889e
Patch-mainline: v5.4-rc1

Four different fields are in CDWs of Get LBA Status command which means
it would be great if we can see in detail when tracing.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/nvme/host/trace.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c
index 9778eb0406b3..5c3cb6928f3c 100644
--- a/drivers/nvme/host/trace.c
+++ b/drivers/nvme/host/trace.c
@@ -86,6 +86,22 @@ static const char *nvme_trace_admin_get_features(struct trace_seq *p,
 	return ret;
 }
 
+static const char *nvme_trace_get_lba_status(struct trace_seq *p,
+					     u8 *cdw10)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	u64 slba = get_unaligned_le64(cdw10);
+	u32 mndw = get_unaligned_le32(cdw10 + 8);
+	u16 rl = get_unaligned_le16(cdw10 + 12);
+	u8 atype = cdw10[15];
+
+	trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
+			slba, mndw, rl, atype);
+	trace_seq_putc(p, 0);
+
+	return ret;
+}
+
 static const char *nvme_trace_read_write(struct trace_seq *p, u8 *cdw10)
 {
 	const char *ret = trace_seq_buffer_ptr(p);
@@ -141,6 +157,8 @@ const char *nvme_trace_parse_admin_cmd(struct trace_seq *p,
 		return nvme_trace_admin_identify(p, cdw10);
 	case nvme_admin_get_features:
 		return nvme_trace_admin_get_features(p, cdw10);
+	case nvme_admin_get_lba_status:
+		return nvme_trace_get_lba_status(p, cdw10);
 	default:
 		return nvme_trace_common(p, cdw10);
 	}
-- 
2.16.4