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Subject[PATCH v2] scsi: ufs: core: Add trace event for MCQ
Date
Added a new trace event to record MCQ relevant information
for each request in MCQ mode, include hardware queue ID,
SQ tail slot, CQ head slot and CQ tail slot.

Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
---
drivers/ufs/core/ufshcd.c | 14 +++++++++++---
include/trace/events/ufs.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+), 3 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 3b3cf78..67cb90d 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -426,6 +426,7 @@ static void ufshcd_add_command_trace(struct ufs_hba *hba, unsigned int tag,
struct ufshcd_lrb *lrbp = &hba->lrb[tag];
struct scsi_cmnd *cmd = lrbp->cmd;
struct request *rq = scsi_cmd_to_rq(cmd);
+ struct ufs_hw_queue *hwq;
int transfer_len = -1;

if (!cmd)
@@ -456,9 +457,16 @@ static void ufshcd_add_command_trace(struct ufs_hba *hba, unsigned int tag,
}

intr = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
- doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
- trace_ufshcd_command(dev_name(hba->dev), str_t, tag,
- doorbell, transfer_len, intr, lba, opcode, group_id);
+
+ if (is_mcq_enabled(hba)) {
+ hwq = ufshcd_mcq_req_to_hwq(hba, rq);
+ trace_ufshcd_command_mcq(dev_name(hba->dev), str_t, tag,
+ hwq, transfer_len, intr, lba, opcode, group_id);
+ } else {
+ doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
+ trace_ufshcd_command(dev_name(hba->dev), str_t, tag,
+ doorbell, transfer_len, intr, lba, opcode, group_id);
+ }
}

static void ufshcd_print_clk_freqs(struct ufs_hba *hba)
diff --git a/include/trace/events/ufs.h b/include/trace/events/ufs.h
index 599739e..4fccc34 100644
--- a/include/trace/events/ufs.h
+++ b/include/trace/events/ufs.h
@@ -10,6 +10,7 @@
#define _TRACE_UFS_H

#include <linux/tracepoint.h>
+#include <ufs/ufshcd.h>

#define str_opcode(opcode) \
__print_symbolic(opcode, \
@@ -307,6 +308,53 @@ TRACE_EVENT(ufshcd_command,
)
);

+TRACE_EVENT(ufshcd_command_mcq,
+ TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t,
+ unsigned int tag, struct ufs_hw_queue *hwq, int transfer_len,
+ u32 intr, u64 lba, u8 opcode, u8 group_id),
+
+ TP_ARGS(dev_name, str_t, tag, hwq, transfer_len, intr, lba, opcode, group_id),
+
+ TP_STRUCT__entry(
+ __string(dev_name, dev_name)
+ __field(enum ufs_trace_str_t, str_t)
+ __field(unsigned int, tag)
+ __field(u32, hwq_id)
+ __field(u32, sq_tail)
+ __field(u32, cq_head)
+ __field(u32, cq_tail)
+ __field(int, transfer_len)
+ __field(u32, intr)
+ __field(u64, lba)
+ __field(u8, opcode)
+ __field(u8, group_id)
+ ),
+
+ TP_fast_assign(
+ __assign_str(dev_name, dev_name);
+ __entry->str_t = str_t;
+ __entry->tag = tag;
+ __entry->hwq_id = hwq->id;
+ __entry->sq_tail = hwq->sq_tail_slot;
+ __entry->cq_head = hwq->cq_head_slot;
+ __entry->cq_tail = hwq->cq_tail_slot;
+ __entry->transfer_len = transfer_len;
+ __entry->intr = intr;
+ __entry->lba = lba;
+ __entry->opcode = opcode;
+ __entry->group_id = group_id;
+ ),
+
+ TP_printk(
+ "%s: %s: tag: %u, hwq_id: %d, size: %d, IS: %u, LBA: %llu, opcode: 0x%x (%s), group_id: 0x%x, sq_tail_slot: %d, cq_head_slot: %d, cq_tail_slot: %d",
+ show_ufs_cmd_trace_str(__entry->str_t), __get_str(dev_name),
+ __entry->tag, __entry->hwq_id, __entry->transfer_len,
+ __entry->intr, __entry->lba, (u32)__entry->opcode,
+ str_opcode(__entry->opcode), (u32)__entry->group_id,
+ __entry->sq_tail, __entry->cq_head, __entry->cq_tail
+ )
+);
+
TRACE_EVENT(ufshcd_uic_command,
TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t, u32 cmd,
u32 arg1, u32 arg2, u32 arg3),
--
2.7.4
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