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-rw-r--r--drivers/nvme/host/trace.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c
new file mode 100644
index 000000000000..41944bbef835
--- /dev/null
+++ b/drivers/nvme/host/trace.c
@@ -0,0 +1,130 @@
+/*
+ * NVM Express device driver tracepoints
+ * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <asm/unaligned.h>
+#include "trace.h"
+
+static const char *nvme_trace_create_sq(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u16 sqid = get_unaligned_le16(cdw10);
+ u16 qsize = get_unaligned_le16(cdw10 + 2);
+ u16 sq_flags = get_unaligned_le16(cdw10 + 4);
+ u16 cqid = get_unaligned_le16(cdw10 + 6);
+
+
+ trace_seq_printf(p, "sqid=%u, qsize=%u, sq_flags=0x%x, cqid=%u",
+ sqid, qsize, sq_flags, cqid);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvme_trace_create_cq(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u16 cqid = get_unaligned_le16(cdw10);
+ u16 qsize = get_unaligned_le16(cdw10 + 2);
+ u16 cq_flags = get_unaligned_le16(cdw10 + 4);
+ u16 irq_vector = get_unaligned_le16(cdw10 + 6);
+
+ trace_seq_printf(p, "cqid=%u, qsize=%u, cq_flags=0x%x, irq_vector=%u",
+ cqid, qsize, cq_flags, irq_vector);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvme_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ u8 cns = cdw10[0];
+ u16 ctrlid = get_unaligned_le16(cdw10 + 2);
+
+ trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
+ 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);
+ u64 slba = get_unaligned_le64(cdw10);
+ u16 length = get_unaligned_le16(cdw10 + 8);
+ u16 control = get_unaligned_le16(cdw10 + 10);
+ u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
+ u32 reftag = get_unaligned_le32(cdw10 + 16);
+
+ trace_seq_printf(p,
+ "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
+ slba, length, control, dsmgmt, reftag);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvme_trace_dsm(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "nr=%u, attributes=%u",
+ get_unaligned_le32(cdw10),
+ get_unaligned_le32(cdw10 + 4));
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *nvme_trace_common(struct trace_seq *p, u8 *cdw10)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *nvme_trace_parse_admin_cmd(struct trace_seq *p,
+ u8 opcode, u8 *cdw10)
+{
+ switch (opcode) {
+ case nvme_admin_create_sq:
+ return nvme_trace_create_sq(p, cdw10);
+ case nvme_admin_create_cq:
+ return nvme_trace_create_cq(p, cdw10);
+ case nvme_admin_identify:
+ return nvme_trace_admin_identify(p, cdw10);
+ default:
+ return nvme_trace_common(p, cdw10);
+ }
+}
+
+const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p,
+ u8 opcode, u8 *cdw10)
+{
+ switch (opcode) {
+ case nvme_cmd_read:
+ case nvme_cmd_write:
+ case nvme_cmd_write_zeroes:
+ return nvme_trace_read_write(p, cdw10);
+ case nvme_cmd_dsm:
+ return nvme_trace_dsm(p, cdw10);
+ default:
+ return nvme_trace_common(p, cdw10);
+ }
+}