This change adds ftrace support for following:
1. mhi_intvec_threaded_handler
2. mhi_process_data_event_ring
3. mhi_process_ctrl_ev_ring
4. mhi_gen_tre
5. mhi_update_channel_state
6. mhi_tryset_pm_state
7. mhi_pm_st_worker
Usage:
echo 1 > /sys/kernel/debug/tracing/events/mhi_host/enable
cat /sys/kernel/debug/tracing/trace
Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
---
MAINTAINERS | 1 +
drivers/bus/mhi/host/init.c | 3 +
drivers/bus/mhi/host/internal.h | 1 +
drivers/bus/mhi/host/main.c | 27 ++++--
drivers/bus/mhi/host/pm.c | 7 +-
include/trace/events/mhi_host.h | 207 ++++++++++++++++++++++++++++++++++++++++
6 files changed, 234 insertions(+), 12 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 35977b269d5e..4339c668a6ab 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13862,6 +13862,7 @@ F: Documentation/mhi/
F: drivers/bus/mhi/
F: drivers/pci/endpoint/functions/pci-epf-mhi.c
F: include/linux/mhi.h
+F: include/trace/events/mhi_host.h
MICROBLAZE ARCHITECTURE
M: Michal Simek <monstr@xxxxxxxxx>
diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
index f78aefd2d7a3..3afa90a204fd 100644
--- a/drivers/bus/mhi/host/init.c
+++ b/drivers/bus/mhi/host/init.c
@@ -20,6 +20,9 @@
#include <linux/wait.h>
#include "internal.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/mhi_host.h>
+
static DEFINE_IDA(mhi_controller_ida);
const char * const mhi_ee_str[MHI_EE_MAX] = {
diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h
index 2e139e76de4c..a80a317a59a9 100644
--- a/drivers/bus/mhi/host/internal.h
+++ b/drivers/bus/mhi/host/internal.h
@@ -7,6 +7,7 @@
#ifndef _MHI_INT_H
#define _MHI_INT_H
+#include <trace/events/mhi_host.h>
#include "../common.h"
extern struct bus_type mhi_bus_type;
diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
index dcf627b36e82..499590437e9b 100644
--- a/drivers/bus/mhi/host/main.c
+++ b/drivers/bus/mhi/host/main.c
@@ -491,11 +491,10 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv)
state = mhi_get_mhi_state(mhi_cntrl);
ee = mhi_get_exec_env(mhi_cntrl);
- dev_dbg(dev, "local ee: %s state: %s device ee: %s state: %s\n",
- TO_MHI_EXEC_STR(mhi_cntrl->ee),
- mhi_state_str(mhi_cntrl->dev_state),
- TO_MHI_EXEC_STR(ee), mhi_state_str(state));
+ trace_mhi_intvec_threaded_handler(mhi_cntrl->mhi_dev->name, TO_MHI_EXEC_STR(mhi_cntrl->ee),
+ mhi_state_str(mhi_cntrl->dev_state),
+ TO_MHI_EXEC_STR(ee), mhi_state_str(state));
if (state == MHI_STATE_SYS_ERR) {
dev_dbg(dev, "System error detected\n");
pm_state = mhi_tryset_pm_state(mhi_cntrl,
@@ -832,6 +831,11 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
while (dev_rp != local_rp) {
enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
+ trace_mhi_process_ctrl_ev_ring(mhi_cntrl->mhi_dev->name, (u64)(local_rp),
+ local_rp->ptr, local_rp->dword[0],
+ local_rp->dword[1],
+ mhi_state_str(MHI_TRE_GET_EV_STATE(local_rp)));
+
switch (type) {
case MHI_PKT_TYPE_BW_REQ_EVENT:
{
@@ -997,6 +1001,9 @@ int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
while (dev_rp != local_rp && event_quota > 0) {
enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp);
+ trace_mhi_process_data_event_ring(mhi_cntrl->mhi_dev->name, local_rp->ptr,
+ local_rp->dword[0], local_rp->dword[1]);
+
chan = MHI_TRE_GET_EV_CHID(local_rp);
WARN_ON(chan >= mhi_cntrl->max_chan);
@@ -1235,6 +1242,8 @@ int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(info->len);
mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, eot, eob, chain);
+ trace_mhi_gen_tre(mhi_cntrl->mhi_dev->name, mhi_chan->chan, (u64)(mhi_tre),
+ mhi_tre->ptr, mhi_tre->dword[0], mhi_tre->dword[1]);
/* increment WP */
mhi_add_ring_element(mhi_cntrl, tre_ring);
mhi_add_ring_element(mhi_cntrl, buf_ring);
@@ -1327,9 +1336,8 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl,
enum mhi_cmd_type cmd = MHI_CMD_NOP;
int ret;
- dev_dbg(dev, "%d: Updating channel state to: %s\n", mhi_chan->chan,
- TO_CH_STATE_TYPE_STR(to_state));
-
+ trace_mhi_update_channel_state_start(mhi_cntrl->mhi_dev->name, mhi_chan->chan,
+ TO_CH_STATE_TYPE_STR(to_state));
switch (to_state) {
case MHI_CH_STATE_TYPE_RESET:
write_lock_irq(&mhi_chan->lock);
@@ -1396,9 +1404,8 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl,
write_unlock_irq(&mhi_chan->lock);
}
- dev_dbg(dev, "%d: Channel state change to %s successful\n",
- mhi_chan->chan, TO_CH_STATE_TYPE_STR(to_state));
-
+ trace_mhi_update_channel_state_end(mhi_cntrl->mhi_dev->name, mhi_chan->chan,
+ TO_CH_STATE_TYPE_STR(to_state));
exit_channel_update:
mhi_cntrl->runtime_put(mhi_cntrl);
mhi_device_put(mhi_cntrl->mhi_dev);
diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
index 8a4362d75fc4..1a0ccb8ff115 100644
--- a/drivers/bus/mhi/host/pm.c
+++ b/drivers/bus/mhi/host/pm.c
@@ -123,6 +123,8 @@ enum mhi_pm_state __must_check mhi_tryset_pm_state(struct mhi_controller *mhi_cn
if (unlikely(!(dev_state_transitions[index].to_states & state)))
return cur_state;
+ trace_mhi_tryset_pm_state(mhi_cntrl->mhi_dev->name, to_mhi_pm_state_str(state));
+
mhi_cntrl->pm_state = state;
return mhi_cntrl->pm_state;
}
@@ -761,8 +763,9 @@ void mhi_pm_st_worker(struct work_struct *work)
list_for_each_entry_safe(itr, tmp, &head, node) {
list_del(&itr->node);
- dev_dbg(dev, "Handling state transition: %s\n",
- TO_DEV_STATE_TRANS_STR(itr->state));
+
+ trace_mhi_pm_st_worker(mhi_cntrl->mhi_dev->name,
+ TO_DEV_STATE_TRANS_STR(itr->state));
switch (itr->state) {
case DEV_ST_TRANSITION_PBL:
diff --git a/include/trace/events/mhi_host.h b/include/trace/events/mhi_host.h
new file mode 100644
index 000000000000..bcb2f12bc1bb
--- /dev/null
+++ b/include/trace/events/mhi_host.h
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM mhi_host
+
+#if !defined(_TRACE_EVENT_MHI_HOST_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_EVENT_MHI_HOST_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(mhi_gen_tre,
+
+ TP_PROTO(const char *name, int ch_num, u64 wp, u64 tre_ptr, int dword0, int dword1),
+
+ TP_ARGS(name, ch_num, wp, tre_ptr, dword0, dword1),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(int, ch_num)
+ __field(u64, wp)
+ __field(u64, tre_ptr)
+ __field(int, dword0)
+ __field(int, dword1)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ch_num = ch_num;
+ __entry->wp = wp;
+ __entry->tre_ptr = tre_ptr;
+ __entry->dword0 = dword0;
+ __entry->dword1 = dword1;
+ ),
+
+ TP_printk("%s: Chan: %d WP: 0x%llx TRE: 0x%llx 0x%08x 0x%08x\n",
+ __get_str(name), __entry->ch_num, __entry->wp, __entry->tre_ptr,
+ __entry->dword0, __entry->dword1)
+);
+
+TRACE_EVENT(mhi_intvec_threaded_handler,
+
+ TP_PROTO(const char *name, const char *local_ee, const char *state, const char *dev_ee,
+ const char *dev_state),
+
+ TP_ARGS(name, local_ee, state, dev_ee, dev_state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __string(local_ee, local_ee)
+ __string(state, state)
+ __string(dev_ee, dev_ee)
+ __string(dev_state, dev_state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __assign_str(local_ee, local_ee);
+ __assign_str(state, state);
+ __assign_str(dev_ee, dev_ee);
+ __assign_str(dev_state, dev_state);
+ ),
+
+ TP_printk("%s: local ee: %s state: %s device ee: %s state: %s\n",
+ __get_str(name), __get_str(local_ee), __get_str(state), __get_str(dev_ee),
+ __get_str(dev_state))
+);
+
+TRACE_EVENT(mhi_tryset_pm_state,
+
+ TP_PROTO(const char *name, const char *pm_state),
+
+ TP_ARGS(name, pm_state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __string(pm_state, pm_state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __assign_str(pm_state, pm_state);
+ ),
+
+ TP_printk("%s: PM state: %s\n", __get_str(name), __get_str(pm_state))
+);
+
+TRACE_EVENT(mhi_process_data_event_ring,
+
+ TP_PROTO(const char *name, u64 ptr, int dword0, int dword1),
+
+ TP_ARGS(name, ptr, dword0, dword1),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(u64, ptr)
+ __field(int, dword0)
+ __field(int, dword1)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ptr = ptr;
+ __entry->dword0 = dword0;
+ __entry->dword1 = dword1;
+ ),
+
+ TP_printk("%s: Processing Event:0x%llx 0x%08x 0x%08x\n",
+ __get_str(name), __entry->ptr, __entry->dword0, __entry->dword1)
+);
+
+TRACE_EVENT(mhi_process_ctrl_ev_ring,
+
+ TP_PROTO(const char *name, u64 rp, u64 ptr, int dword0, int dword1, const char *state),
+
+ TP_ARGS(name, rp, ptr, dword0, dword1, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(u64, rp)
+ __field(u64, ptr)
+ __field(int, dword0)
+ __field(int, dword1)
+ __string(state, state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->rp = rp;
+ __entry->ptr = ptr;
+ __entry->dword0 = dword0;
+ __entry->dword1 = dword1;
+ __assign_str(state, state);
+ ),
+
+ TP_printk("%s: RP:0x%llx Processing Event:0x%llx 0x%08x 0x%08x state:%s\n",
+ __get_str(name), __entry->rp, __entry->ptr, __entry->dword0,
+ __entry->dword1, __get_str(state))
+);
+
+TRACE_EVENT(mhi_update_channel_state_start,
+
+ TP_PROTO(const char *name, int ch_num, const char *state),
+
+ TP_ARGS(name, ch_num, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(int, ch_num)
+ __string(state, state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ch_num = ch_num;
+ __assign_str(state, state);
+ ),
+
+ TP_printk("%s: ch%d: Updating state to: %s\n",
+ __get_str(name), __entry->ch_num, __get_str(state))
+);
+
+TRACE_EVENT(mhi_update_channel_state_end,
+
+ TP_PROTO(const char *name, int ch_num, const char *state),
+
+ TP_ARGS(name, ch_num, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(int, ch_num)
+ __string(state, state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ch_num = ch_num;
+ __assign_str(state, state);
+ ),
+
+ TP_printk("%s: ch%d: Updated state to: %s\n",
+ __get_str(name), __entry->ch_num, __get_str(state))
+);
+
+TRACE_EVENT(mhi_pm_st_worker,
+
+ TP_PROTO(const char *name, const char *state),
+
+ TP_ARGS(name, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __string(state, state)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __assign_str(state, state);
+ ),
+
+ TP_printk("%s: Handling state transition: %s\n", __get_str(name), __get_str(state))
+);
+
+#endif
+#include <trace/define_trace.h>
---
base-commit: 3006adf3be79cde4d14b1800b963b82b6e5572e0
change-id: 20231005-ftrace_support-6869d4156139
Best regards,
--
Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
