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| 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/linux | |
| 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/linux')
0 files changed, 0 insertions, 0 deletions