Messages in this thread Patch in this message | | | From | Johannes Thumshirn <> | Subject | [PATCH 1/2] nvme: add tracepoint for nvme_setup_cmd | Date | Tue, 16 Jan 2018 11:34:00 +0100 |
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Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> --- drivers/nvme/host/core.c | 69 +++++++++++++++++++++++++++++++++++++++++++++ include/trace/events/nvme.h | 64 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 133 insertions(+) create mode 100644 include/trace/events/nvme.h
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 839650e0926a..4b6a56fe6ccf 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -29,6 +29,9 @@ #include <linux/pm_qos.h> #include <asm/unaligned.h> +#define CREATE_TRACE_POINTS +#include <trace/events/nvme.h> + #include "nvme.h" #include "fabrics.h" @@ -80,6 +83,71 @@ static struct class *nvme_subsys_class; static void nvme_ns_remove(struct nvme_ns *ns); static int nvme_revalidate_disk(struct gendisk *disk); +static const char *nvme_trace_read_write(struct trace_seq *p, + struct nvme_rw_command rw) +{ + const char *ret = trace_seq_buffer_ptr(p); + + trace_seq_printf(p, "slba=%llu, length=%u, control=0x%x, dsmgmt=%u, reftag=%u", + (unsigned long long)le64_to_cpu(rw.slba), + le16_to_cpu(rw.length), le16_to_cpu(rw.control), + le32_to_cpu(rw.dsmgmt), le32_to_cpu(rw.reftag)); + trace_seq_putc(p, 0); + + return ret; +} + +static const char *nvme_trace_dsm(struct trace_seq *p, struct nvme_dsm_cmd dsm) +{ + const char *ret = trace_seq_buffer_ptr(p); + + trace_seq_printf(p, "nr=%u, attributes=%u", + le32_to_cpu(dsm.nr), le32_to_cpu(dsm.attributes)); + trace_seq_putc(p, 0); + + return ret; +} + +static const char *nvme_trace_write_zeroes(struct trace_seq *p, + struct nvme_write_zeroes_cmd wz) +{ + const char *ret = trace_seq_buffer_ptr(p); + + trace_seq_printf(p, "slba=%llu, length=%u, control=%u, dsmgmt=%u, reftag=%u", + (unsigned long long) le64_to_cpu(wz.slba), + le16_to_cpu(wz.length), le16_to_cpu(wz.control), + le32_to_cpu(wz.dsmgmt), le32_to_cpu(wz.reftag)); + trace_seq_putc(p, 0); + + return ret; +} + +static const char *nvme_trace_common(struct trace_seq *p, + struct nvme_common_command c) +{ + const char *ret = trace_seq_buffer_ptr(p); + + trace_seq_printf(p, "cdw2=%*ph, cdw10=%*ph", 4, c.cdw2, 24, c.cdw10); + trace_seq_putc(p, 0); + + return ret; +} + +const char *nvme_trace_parse_cmd(struct trace_seq *p, struct nvme_command cmd) +{ + switch (cmd.common.opcode) { + case nvme_cmd_read: + case nvme_cmd_write: + return nvme_trace_read_write(p, cmd.rw); + case nvme_cmd_dsm: + return nvme_trace_dsm(p, cmd.dsm); + case nvme_cmd_write_zeroes: + return nvme_trace_write_zeroes(p, cmd.write_zeroes); + default: + return nvme_trace_common(p, cmd.common); + } +} + static __le32 nvme_get_log_dw10(u8 lid, size_t size) { return cpu_to_le32((((size / 4) - 1) << 16) | lid); @@ -591,6 +659,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, } cmd->common.command_id = req->tag; + trace_nvme_setup_cmd(cmd); return ret; } EXPORT_SYMBOL_GPL(nvme_setup_cmd); diff --git a/include/trace/events/nvme.h b/include/trace/events/nvme.h new file mode 100644 index 000000000000..2e93bc7d4f84 --- /dev/null +++ b/include/trace/events/nvme.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM nvme + +#if !defined(_TRACE_NVME_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_NVME_H + +#include <linux/nvme.h> +#include <linux/tracepoint.h> +#include <linux/trace_seq.h> + +#define nvme_opcode_name(opcode) { opcode, #opcode } +#define show_opcode_name(val) \ + __print_symbolic(val, \ + nvme_opcode_name(nvme_cmd_flush), \ + nvme_opcode_name(nvme_cmd_write), \ + nvme_opcode_name(nvme_cmd_read), \ + nvme_opcode_name(nvme_cmd_write_uncor), \ + nvme_opcode_name(nvme_cmd_compare), \ + nvme_opcode_name(nvme_cmd_write_zeroes), \ + nvme_opcode_name(nvme_cmd_dsm), \ + nvme_opcode_name(nvme_cmd_resv_register), \ + nvme_opcode_name(nvme_cmd_resv_report), \ + nvme_opcode_name(nvme_cmd_resv_acquire), \ + nvme_opcode_name(nvme_cmd_resv_release)) + +const char *nvme_trace_parse_cmd(struct trace_seq *p, struct nvme_command cmnd); +#define __parse_nvme_cmd(cmd) nvme_trace_parse_cmd(p, cmd) + +TRACE_EVENT(nvme_setup_cmd, + + TP_PROTO(struct nvme_command *cmd), + + TP_ARGS(cmd), + + TP_STRUCT__entry( + __field( __u8, opcode ) + __field( __u8, flags ) + __field( __u16, cid ) + __field( __le32, nsid ) + __field( __le64, metadata ) + __field_struct( struct nvme_command, cmnd ) + ), + + TP_fast_assign( + __entry->opcode = cmd->common.opcode; + __entry->flags = cmd->common.flags; + __entry->cid = cmd->common.command_id; + __entry->nsid = cmd->common.nsid; + __entry->metadata = cmd->common.metadata; + memcpy(&__entry->cmnd, cmd, sizeof(__entry->cmnd)); + ), + + TP_printk("nsid=%u, command_id=%u, flags=0x%x, metadata=0x%llx, cmd=(%s %s)", + le32_to_cpu(__entry->nsid), __entry->cid, __entry->flags, + (unsigned long long) le64_to_cpu(__entry->metadata), + show_opcode_name(__entry->opcode), + __parse_nvme_cmd(__entry->cmnd)) +); + +#endif /* _TRACE_NVME_H */ + +/* This part must be boutside protection */ +#include <trace/define_trace.h> -- 2.12.3
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