scsi: pm80xx: Add pm80xx_mpi_build_cmd() tracepoint

pm8001_mpi_build_cmd() prepares and sends all commands to a controller.
Having pm80xx_mpi_build_cmd tracepoint can help us with latency issues.

this patch depends on patch "scsi: pm80xx: Add tracepoints".

Link: https://lore.kernel.org/r/20211115215750.131696-3-changyuanl@google.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Co-developed-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Changyuan Lyu <changyuanl@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c
index f8e29d5..c814e50 100644 (file)
--- a/drivers/scsi/pm8001/pm8001_hwi.c
+++ b/drivers/scsi/pm8001/pm8001_hwi.c
@@ -42,6 +42,7 @@
  #include "pm8001_hwi.h"
  #include "pm8001_chips.h"
  #include "pm8001_ctl.h"
+ #include "pm80xx_tracepoints.h"
 
 /**
  * read_main_config_table - read the configure table and save it.
@@ -1324,6 +1325,10 @@ int pm8001_mpi_build_cmd(struct pm8001_hba_info *pm8001_ha,
        unsigned long flags;
        int q_index = circularQ - pm8001_ha->inbnd_q_tbl;
        int rv;
+       u32 htag = le32_to_cpu(*(__le32 *)payload);
+
+       trace_pm80xx_mpi_build_cmd(pm8001_ha->id, opCode, htag, q_index,
+               circularQ->producer_idx, le32_to_cpu(circularQ->consumer_index));
 
        if (WARN_ON(q_index >= pm8001_ha->max_q_num))
                return -EINVAL;

diff --git a/drivers/scsi/pm8001/pm80xx_tracepoints.h b/drivers/scsi/pm8001/pm80xx_tracepoints.h
index 84fcfec..5e669a8 100644 (file)
--- a/drivers/scsi/pm8001/pm80xx_tracepoints.h
+++ b/drivers/scsi/pm8001/pm80xx_tracepoints.h
@@ -75,6 +75,34 @@ TRACE_EVENT(pm80xx_request_complete,
                    __entry->running_req)
 );
 
+TRACE_EVENT(pm80xx_mpi_build_cmd,
+           TP_PROTO(u32 id, u32 opc, u32 htag, u32 qi, u32 pi, u32 ci),
+
+           TP_ARGS(id, opc, htag, qi, pi, ci),
+
+           TP_STRUCT__entry(
+                   __field(u32, id)
+                   __field(u32, opc)
+                   __field(u32, htag)
+                   __field(u32, qi)
+                   __field(u32, pi)
+                   __field(u32, ci)
+                   ),
+
+           TP_fast_assign(
+                   __entry->id = id;
+                   __entry->opc = opc;
+                   __entry->htag = htag;
+                   __entry->qi = qi;
+                   __entry->pi = pi;
+                   __entry->ci = ci;
+                   ),
+
+           TP_printk("ctlr_id = %u opc = %#x htag = %#x QI = %u PI = %u CI = %u",
+                   __entry->id, __entry->opc, __entry->htag, __entry->qi,
+                   __entry->pi, __entry->ci)
+);
+
 #endif /* _TRACE_PM80XX_H_ */
 
 #undef TRACE_INCLUDE_PATH