From 1a07f2d96eb9085396cbfb2d6d42d4003aa2934a Mon Sep 17 00:00:00 2001 From: Lee Susman Date: Thu, 22 Dec 2016 18:42:03 -0800 Subject: 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 Signed-off-by: Subhash Jadavani Signed-off-by: Martin K. Petersen --- include/trace/events/ufs.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'include/trace') 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 */ -- cgit v1.2.3