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| author | Lee Susman <lsusman@codeaurora.org> | 2016-12-22 18:42:03 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-01-05 18:10:04 -0500 |
| commit | 1a07f2d96eb9085396cbfb2d6d42d4003aa2934a (patch) | |
| tree | 8fd5227aa9e3bded8b153cbbfcfc67e0cf5a92f2 /include/trace | |
| parent | 911a0771b6fa7bac5eae753c17c87ecb77c77283 (diff) | |
| download | talos-obmc-linux-1a07f2d96eb9085396cbfb2d6d42d4003aa2934a.tar.gz talos-obmc-linux-1a07f2d96eb9085396cbfb2d6d42d4003aa2934a.zip | |
scsi: ufs: add trace event for ufs commands
Use the ftrace infrastructure to conditionally trace ufs command events.
New trace event is created, which samples the following ufs command data:
- device name
- optional identification string
- task tag
- doorbell register
- number of transfer bytes
- interrupt status register
- request start LBA
- command opcode
Currently we only fully trace read(10) and write(10) commands.
All other commands which pass through ufshcd_send_command() will be
printed with "-1" in the lba and transfer_len fields.
Usage:
echo 1 > /sys/kernel/debug/tracing/events/ufs/enable
cat /sys/kernel/debug/tracing/trace_pipe
Signed-off-by: Lee Susman <lsusman@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/ufs.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/trace/events/ufs.h b/include/trace/events/ufs.h index e9634dff51a8..bf6f82673492 100644 --- a/include/trace/events/ufs.h +++ b/include/trace/events/ufs.h @@ -219,6 +219,44 @@ DEFINE_EVENT(ufshcd_template, ufshcd_init, TP_PROTO(const char *dev_name, int err, s64 usecs, int dev_state, int link_state), TP_ARGS(dev_name, err, usecs, dev_state, link_state)); + +TRACE_EVENT(ufshcd_command, + TP_PROTO(const char *dev_name, const char *str, unsigned int tag, + u32 doorbell, int transfer_len, u32 intr, u64 lba, + u8 opcode), + + TP_ARGS(dev_name, str, tag, doorbell, transfer_len, intr, lba, opcode), + + TP_STRUCT__entry( + __string(dev_name, dev_name) + __string(str, str) + __field(unsigned int, tag) + __field(u32, doorbell) + __field(int, transfer_len) + __field(u32, intr) + __field(u64, lba) + __field(u8, opcode) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name); + __assign_str(str, str); + __entry->tag = tag; + __entry->doorbell = doorbell; + __entry->transfer_len = transfer_len; + __entry->intr = intr; + __entry->lba = lba; + __entry->opcode = opcode; + ), + + TP_printk( + "%s: %s: tag: %u, DB: 0x%x, size: %d, IS: %u, LBA: %llu, opcode: 0x%x", + __get_str(str), __get_str(dev_name), __entry->tag, + __entry->doorbell, __entry->transfer_len, + __entry->intr, __entry->lba, (u32)__entry->opcode + ) +); + #endif /* if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ) */ /* This part must be outside protection */ |
