From 3d030e41d96f46c14faf79f19c3cf1b9961815c8 Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Fri, 26 Jan 2018 11:21:37 +0100 Subject: nvme: add tracepoint for nvme_setup_cmd Add tracepoints for nvme_setup_cmd() for tracing admin and/or nvm commands. Examples of the two tracepoints are as follows for trace_nvme_setup_admin_cmd(): kworker/u8:0-5 [003] .... 2.998792: nvme_setup_admin_cmd: cmdid=14, flags=0x0, meta=0x0, cmd=(nvme_admin_create_cq cqid=1, qsize=1023, cq_flags=0x3, irq_vector=0) and trace_nvme_setup_nvm_cmd(): dd-205 [001] .... 3.503929: nvme_setup_nvm_cmd: qid=1, nsid=1, cmdid=989, flags=0x0, meta=0x0, cmd=(nvme_cmd_read slba=4096, len=2047, ctrl=0x0, dsmgmt=0, reftag=0) Signed-off-by: Johannes Thumshirn Reviewed-by: Hannes Reinecke Reviewed-by: Martin K. Petersen Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/trace.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 drivers/nvme/host/trace.c (limited to 'drivers/nvme/host/trace.c') 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 +#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); + } +} -- cgit v1.2.3