diff options
| author | Lee Susman <lsusman@codeaurora.org> | 2014-06-24 17:28:50 +0300 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 10:57:53 -0700 |
| commit | b0c1404cb07d813f05c0936749b7b34ffc6e01bc (patch) | |
| tree | fa89c24ab643c12bef283ddb36c4e65d1efae06d /include | |
| parent | 134fbea94bfc598f838e4a842ee77b2d5522fb8a (diff) | |
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
Change-Id: Id6e16a8c0b2a833c5453ed9923384f641e374a71
Signed-off-by: Lee Susman <lsusman@codeaurora.org>
[gbroner@codeaurora.org: fix merge conflict]
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>
[subhashj@codeaurora.org: resolved merge conflicts and compilation error]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Diffstat (limited to 'include')
| -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 b239bbb43b62..5dea878179f6 100644 --- a/include/trace/events/ufs.h +++ b/include/trace/events/ufs.h @@ -203,6 +203,44 @@ DEFINE_EVENT(ufshcd_template, ufshcd_init, TP_PROTO(const char *dev_name, int err, s64 usecs, const char *dev_state, const char *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 */ |