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Date: Tue, 6 Feb 2024 11:56:36 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Cc: Manivannan Sadhasivam <mani@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	linux-kernel@vger.kernel.org, mhi@lists.linux.dev,
	linux-arm-msm@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
	quic_vbadigan@quicinc.com, quic_ramkri@quicinc.com,
	quic_nitegupt@quicinc.com, quic_skananth@quicinc.com,
	quic_parass@quicinc.com
Subject: Re: [PATCH v11] bus: mhi: host: Add tracing support
Message-ID: <20240206062636.GA8333@thinkpad>
References: <20240206-ftrace_support-v11-1-3f71dc187544@quicinc.com>
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In-Reply-To: <20240206-ftrace_support-v11-1-3f71dc187544@quicinc.com>

On Tue, Feb 06, 2024 at 10:02:05AM +0530, Krishna chaitanya chundru wrote:
> This change adds ftrace support for following functions which
> helps in debugging the issues when there is Channel state & MHI
> state change and also when we receive data and control events:
> 1. mhi_intvec_mhi_states
> 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
> 
> Change the implementation of the arrays which has enum to strings mapping
> to make it consistent in both trace header file and other files.
> 
> Where ever the trace events are added, debug messages are removed.
> 
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>

There are a lot of checkpatch errors. Please fix them and resubmit.

- Mani

> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Reviewed-by: "Steven Rostedt (Google)" <rostedt@goodmis.org>
> ---
> Changes in v11:
> - Rebased with mhi next.
> - Link to v10: https://lore.kernel.org/r/20240131-ftrace_support-v10-1-4349306b8f81@quicinc.com
> 
> Changes in v10:
> - Modified command_start and command_end traces to take string as input to mention correct
> - string as suggested by mani
> - As sugggested by mani modified the print format from lower format to upper case format.
> - Link to v9: https://lore.kernel.org/r/20240105-ftrace_support-v9-1-a2dca64cc6ea@quicinc.com
> 
> Changes in v9:
> - Change the implementations of some array so that the strings to enum mapping
> - is same in both trace header and other files as suggested by steve.
> - Link to v8: https://lore.kernel.org/r/20231207-ftrace_support-v8-1-7f62d4558555@quicinc.com
> 
> Changes in v8:
> - Pass the structure and derefernce the variables in TP_fast_assign as suggested by steve
> - Link to v7: https://lore.kernel.org/r/20231206-ftrace_support-v7-1-aca49a04268b@quicinc.com
> 
> Changes in v7:
> - change log format as pointed by mani.
> - Link to v6: https://lore.kernel.org/r/20231204-ftrace_support-v6-1-9b206546dac2@quicinc.com
> 
> Changes in v6:
> - use 'rp' directly as suggested by jeffrey.
> - Link to v5: https://lore.kernel.org/r/20231127-ftrace_support-v5-1-eb67daead4f1@quicinc.com
> 
> Changes in v5:
> - Use DECLARE_EVENT_CLASS for multiple events as suggested by steve.
> - Instead of converting to u64 to print address, use %px to print the address to avoid
> - warnings in some platforms.
> - Link to v4: https://lore.kernel.org/r/20231111-ftrace_support-v4-1-c83602399461@quicinc.com
> 
> Changes in v4:
> - Fix compilation issues in previous patch which happended due to rebasing.
> - In the defconfig FTRACE config is not enabled due to that the compilation issue is not
> - seen in my workspace.
> - Link to v3: https://lore.kernel.org/r/20231111-ftrace_support-v3-1-f358d2911a74@quicinc.com
> 
> Changes in v3:
> - move trace header file from include/trace/events to drivers/bus/mhi/host/ so that
> - we can include driver header files.
> - Use macros directly in the trace events as suggested Jeffrey Hugo.
> - Reorder the structure in the events as suggested by steve to avoid holes in the buffer.
> - removed the mhi_to_physical function as this can give security issues.
> - removed macros to define strings as we can get those from driver headers.
> - Link to v2: https://lore.kernel.org/r/20231013-ftrace_support-v2-1-6e893ce010b5@quicinc.com
> 
> Changes in v2:
> - Passing the raw state into the trace event and using  __print_symbolic() as suggested by bjorn.
> - Change mhi_pm_st_worker to mhi_pm_st_transition as suggested by bjorn.
> - Fixed the kernel test rebot issues.
> - Link to v1: https://lore.kernel.org/r/20231005-ftrace_support-v1-1-23a2f394fa49@quicinc.com
> ---
>  drivers/bus/mhi/common.h        |  38 +++---
>  drivers/bus/mhi/host/init.c     |  64 +++++----
>  drivers/bus/mhi/host/internal.h |  41 ++++++
>  drivers/bus/mhi/host/main.c     |  19 ++-
>  drivers/bus/mhi/host/pm.c       |   7 +-
>  drivers/bus/mhi/host/trace.h    | 280 ++++++++++++++++++++++++++++++++++++++++
>  6 files changed, 384 insertions(+), 65 deletions(-)
> 
> diff --git a/drivers/bus/mhi/common.h b/drivers/bus/mhi/common.h
> index f794b9c8049e..dda340aaed95 100644
> --- a/drivers/bus/mhi/common.h
> +++ b/drivers/bus/mhi/common.h
> @@ -297,30 +297,30 @@ struct mhi_ring_element {
>  	__le32 dword[2];
>  };
>  
> +#define MHI_STATE_LIST				\
> +	mhi_state(RESET,	"RESET")	\
> +	mhi_state(READY,	"READY")	\
> +	mhi_state(M0,		"M0")		\
> +	mhi_state(M1,		"M1")		\
> +	mhi_state(M2,		"M2")		\
> +	mhi_state(M3,		"M3")		\
> +	mhi_state(M3_FAST,	"M3_FAST")	\
> +	mhi_state(BHI,		"BHI")		\
> +	mhi_state_end(SYS_ERR,	"SYS ERROR")
> +
> +#undef mhi_state
> +#undef mhi_state_end
> +
> +#define mhi_state(a, b)		case MHI_STATE_##a: return b;
> +#define mhi_state_end(a, b)	case MHI_STATE_##a: return b;
> +
>  static inline const char *mhi_state_str(enum mhi_state state)
>  {
>  	switch (state) {
> -	case MHI_STATE_RESET:
> -		return "RESET";
> -	case MHI_STATE_READY:
> -		return "READY";
> -	case MHI_STATE_M0:
> -		return "M0";
> -	case MHI_STATE_M1:
> -		return "M1";
> -	case MHI_STATE_M2:
> -		return "M2";
> -	case MHI_STATE_M3:
> -		return "M3";
> -	case MHI_STATE_M3_FAST:
> -		return "M3 FAST";
> -	case MHI_STATE_BHI:
> -		return "BHI";
> -	case MHI_STATE_SYS_ERR:
> -		return "SYS ERROR";
> +	MHI_STATE_LIST
>  	default:
>  		return "Unknown state";
>  	}
> -};
> +}
>  
>  #endif /* _MHI_COMMON_H */
> diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c
> index 6d3b045ab259..944da46e6f11 100644
> --- a/drivers/bus/mhi/host/init.c
> +++ b/drivers/bus/mhi/host/init.c
> @@ -20,51 +20,49 @@
>  #include <linux/wait.h>
>  #include "internal.h"
>  
> +#define CREATE_TRACE_POINTS
> +#include "trace.h"
> +
>  static DEFINE_IDA(mhi_controller_ida);
>  
> +#undef mhi_ee
> +#undef mhi_ee_end
> +
> +#define mhi_ee(a, b)		[MHI_EE_##a] = b,
> +#define mhi_ee_end(a, b)	[MHI_EE_##a] = b,
> +
>  const char * const mhi_ee_str[MHI_EE_MAX] = {
> -	[MHI_EE_PBL] = "PRIMARY BOOTLOADER",
> -	[MHI_EE_SBL] = "SECONDARY BOOTLOADER",
> -	[MHI_EE_AMSS] = "MISSION MODE",
> -	[MHI_EE_RDDM] = "RAMDUMP DOWNLOAD MODE",
> -	[MHI_EE_WFW] = "WLAN FIRMWARE",
> -	[MHI_EE_PTHRU] = "PASS THROUGH",
> -	[MHI_EE_EDL] = "EMERGENCY DOWNLOAD",
> -	[MHI_EE_FP] = "FLASH PROGRAMMER",
> -	[MHI_EE_DISABLE_TRANSITION] = "DISABLE",
> -	[MHI_EE_NOT_SUPPORTED] = "NOT SUPPORTED",
> +	MHI_EE_LIST
>  };
>  
> +#undef dev_st_trans
> +#undef dev_st_trans_end
> +
> +#define dev_st_trans(a, b)	[DEV_ST_TRANSITION_##a] = b,
> +#define dev_st_trans_end(a, b)	[DEV_ST_TRANSITION_##a] = b,
> +
>  const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX] = {
> -	[DEV_ST_TRANSITION_PBL] = "PBL",
> -	[DEV_ST_TRANSITION_READY] = "READY",
> -	[DEV_ST_TRANSITION_SBL] = "SBL",
> -	[DEV_ST_TRANSITION_MISSION_MODE] = "MISSION MODE",
> -	[DEV_ST_TRANSITION_FP] = "FLASH PROGRAMMER",
> -	[DEV_ST_TRANSITION_SYS_ERR] = "SYS ERROR",
> -	[DEV_ST_TRANSITION_DISABLE] = "DISABLE",
> +	DEV_ST_TRANSITION_LIST
>  };
>  
> +#undef ch_state_type
> +#undef ch_state_type_end
> +
> +#define ch_state_type(a, b)	[MHI_CH_STATE_TYPE_##a] = b,
> +#define ch_state_type_end(a, b)	[MHI_CH_STATE_TYPE_##a] = b,
> +
>  const char * const mhi_ch_state_type_str[MHI_CH_STATE_TYPE_MAX] = {
> -	[MHI_CH_STATE_TYPE_RESET] = "RESET",
> -	[MHI_CH_STATE_TYPE_STOP] = "STOP",
> -	[MHI_CH_STATE_TYPE_START] = "START",
> +	MHI_CH_STATE_TYPE_LIST
>  };
>  
> +#undef mhi_pm_state
> +#undef mhi_pm_state_end
> +
> +#define mhi_pm_state(a, b)	[MHI_PM_STATE_##a] = b,
> +#define mhi_pm_state_end(a, b)	[MHI_PM_STATE_##a] = b,
> +
>  static const char * const mhi_pm_state_str[] = {
> -	[MHI_PM_STATE_DISABLE] = "DISABLE",
> -	[MHI_PM_STATE_POR] = "POWER ON RESET",
> -	[MHI_PM_STATE_M0] = "M0",
> -	[MHI_PM_STATE_M2] = "M2",
> -	[MHI_PM_STATE_M3_ENTER] = "M?->M3",
> -	[MHI_PM_STATE_M3] = "M3",
> -	[MHI_PM_STATE_M3_EXIT] = "M3->M0",
> -	[MHI_PM_STATE_FW_DL_ERR] = "Firmware Download Error",
> -	[MHI_PM_STATE_SYS_ERR_DETECT] = "SYS ERROR Detect",
> -	[MHI_PM_STATE_SYS_ERR_PROCESS] = "SYS ERROR Process",
> -	[MHI_PM_STATE_SYS_ERR_FAIL] = "SYS ERROR Failure",
> -	[MHI_PM_STATE_SHUTDOWN_PROCESS] = "SHUTDOWN Process",
> -	[MHI_PM_STATE_LD_ERR_FATAL_DETECT] = "Linkdown or Error Fatal Detect",
> +	MHI_PM_STATE_LIST
>  };
>  
>  const char *to_mhi_pm_state_str(u32 state)
> diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h
> index 4b6deea17bcd..091244cf17c6 100644
> --- a/drivers/bus/mhi/host/internal.h
> +++ b/drivers/bus/mhi/host/internal.h
> @@ -42,6 +42,11 @@ enum mhi_ch_state_type {
>  	MHI_CH_STATE_TYPE_MAX,
>  };
>  
> +#define MHI_CH_STATE_TYPE_LIST				\
> +	ch_state_type(RESET,		"RESET")	\
> +	ch_state_type(STOP,		"STOP")		\
> +	ch_state_type_end(START,	"START")
> +
>  extern const char * const mhi_ch_state_type_str[MHI_CH_STATE_TYPE_MAX];
>  #define TO_CH_STATE_TYPE_STR(state) (((state) >= MHI_CH_STATE_TYPE_MAX) ? \
>  				     "INVALID_STATE" : \
> @@ -50,6 +55,18 @@ extern const char * const mhi_ch_state_type_str[MHI_CH_STATE_TYPE_MAX];
>  #define MHI_INVALID_BRSTMODE(mode) (mode != MHI_DB_BRST_DISABLE && \
>  				    mode != MHI_DB_BRST_ENABLE)
>  
> +#define MHI_EE_LIST						\
> +	mhi_ee(PBL,			"PRIMARY BOOTLOADER")	\
> +	mhi_ee(SBL,			"SECONDARY BOOTLOADER")	\
> +	mhi_ee(AMSS,			"MISSION MODE")		\
> +	mhi_ee(RDDM,			"RAMDUMP DOWNLOAD MODE")\
> +	mhi_ee(WFW,			"WLAN FIRMWARE")	\
> +	mhi_ee(PTHRU,			"PASS THROUGH")		\
> +	mhi_ee(EDL,			"EMERGENCY DOWNLOAD")	\
> +	mhi_ee(FP,			"FLASH PROGRAMMER")	\
> +	mhi_ee(DISABLE_TRANSITION,	"DISABLE")		\
> +	mhi_ee_end(NOT_SUPPORTED,	"NOT SUPPORTED")
> +
>  extern const char * const mhi_ee_str[MHI_EE_MAX];
>  #define TO_MHI_EXEC_STR(ee) (((ee) >= MHI_EE_MAX) ? \
>  			     "INVALID_EE" : mhi_ee_str[ee])
> @@ -72,6 +89,15 @@ enum dev_st_transition {
>  	DEV_ST_TRANSITION_MAX,
>  };
>  
> +#define DEV_ST_TRANSITION_LIST					\
> +	dev_st_trans(PBL,		"PBL")			\
> +	dev_st_trans(READY,		"READY")		\
> +	dev_st_trans(SBL,		"SBL")			\
> +	dev_st_trans(MISSION_MODE,	"MISSION MODE")		\
> +	dev_st_trans(FP,		"FLASH PROGRAMMER")	\
> +	dev_st_trans(SYS_ERR,		"SYS ERROR")		\
> +	dev_st_trans_end(DISABLE,	"DISABLE")
> +
>  extern const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX];
>  #define TO_DEV_STATE_TRANS_STR(state) (((state) >= DEV_ST_TRANSITION_MAX) ? \
>  				"INVALID_STATE" : dev_state_tran_str[state])
> @@ -94,6 +120,21 @@ enum mhi_pm_state {
>  	MHI_PM_STATE_MAX
>  };
>  
> +#define MHI_PM_STATE_LIST							\
> +	mhi_pm_state(DISABLE,			"DISABLE")			\
> +	mhi_pm_state(POR,			"POWER ON RESET")		\
> +	mhi_pm_state(M0,			"M0")				\
> +	mhi_pm_state(M2,			"M2")				\
> +	mhi_pm_state(M3_ENTER,			"M?->M3")			\
> +	mhi_pm_state(M3,			"M3")				\
> +	mhi_pm_state(M3_EXIT,			"M3->M0")			\
> +	mhi_pm_state(FW_DL_ERR,			"Firmware Download Error")	\
> +	mhi_pm_state(SYS_ERR_DETECT,		"SYS ERROR Detect")		\
> +	mhi_pm_state(SYS_ERR_PROCESS,		"SYS ERROR Process")		\
> +	mhi_pm_state(SYS_ERR_FAIL,		"SYS ERROR Failure")		\
> +	mhi_pm_state(SHUTDOWN_PROCESS,		"SHUTDOWN Process")		\
> +	mhi_pm_state_end(LD_ERR_FATAL_DETECT,	"Linkdown or Error Fatal Detect")
> +
>  #define MHI_PM_DISABLE					BIT(0)
>  #define MHI_PM_POR					BIT(1)
>  #define MHI_PM_M0					BIT(2)
> diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
> index abb561db9ae1..2d38f6005da6 100644
> --- a/drivers/bus/mhi/host/main.c
> +++ b/drivers/bus/mhi/host/main.c
> @@ -15,6 +15,7 @@
>  #include <linux/skbuff.h>
>  #include <linux/slab.h>
>  #include "internal.h"
> +#include "trace.h"
>  
>  int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
>  			      void __iomem *base, u32 offset, u32 *out)
> @@ -493,11 +494,8 @@ 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_states(mhi_cntrl, ee, state);
>  	if (state == MHI_STATE_SYS_ERR) {
>  		dev_dbg(dev, "System error detected\n");
>  		pm_state = mhi_tryset_pm_state(mhi_cntrl,
> @@ -838,6 +836,8 @@ 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_ctrl_event(mhi_cntrl, local_rp);
> +
>  		switch (type) {
>  		case MHI_PKT_TYPE_BW_REQ_EVENT:
>  		{
> @@ -1003,6 +1003,8 @@ 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_data_event(mhi_cntrl, local_rp);
> +
>  		chan = MHI_TRE_GET_EV_CHID(local_rp);
>  
>  		WARN_ON(chan >= mhi_cntrl->max_chan);
> @@ -1243,6 +1245,7 @@ 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_chan, mhi_tre);
>  	/* increment WP */
>  	mhi_add_ring_element(mhi_cntrl, tre_ring);
>  	mhi_add_ring_element(mhi_cntrl, buf_ring);
> @@ -1337,9 +1340,7 @@ 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_channel_command_start(mhi_cntrl, mhi_chan, to_state, "Updating");
>  	switch (to_state) {
>  	case MHI_CH_STATE_TYPE_RESET:
>  		write_lock_irq(&mhi_chan->lock);
> @@ -1406,9 +1407,7 @@ 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_channel_command_end(mhi_cntrl, mhi_chan, to_state, "Updated");
>  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 d0d033ce9984..8b40d3f01acc 100644
> --- a/drivers/bus/mhi/host/pm.c
> +++ b/drivers/bus/mhi/host/pm.c
> @@ -15,6 +15,7 @@
>  #include <linux/slab.h>
>  #include <linux/wait.h>
>  #include "internal.h"
> +#include "trace.h"
>  
>  /*
>   * Not all MHI state transitions are synchronous. Transitions like Linkdown,
> @@ -131,6 +132,7 @@ 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, state);
>  	mhi_cntrl->pm_state = state;
>  	return mhi_cntrl->pm_state;
>  }
> @@ -772,7 +774,6 @@ void mhi_pm_st_worker(struct work_struct *work)
>  	struct mhi_controller *mhi_cntrl = container_of(work,
>  							struct mhi_controller,
>  							st_worker);
> -	struct device *dev = &mhi_cntrl->mhi_dev->dev;
>  
>  	spin_lock_irq(&mhi_cntrl->transition_lock);
>  	list_splice_tail_init(&mhi_cntrl->transition_list, &head);
> @@ -780,8 +781,8 @@ 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_transition(mhi_cntrl, itr->state);
>  
>  		switch (itr->state) {
>  		case DEV_ST_TRANSITION_PBL:
> diff --git a/drivers/bus/mhi/host/trace.h b/drivers/bus/mhi/host/trace.h
> new file mode 100644
> index 000000000000..d12a98d44272
> --- /dev/null
> +++ b/drivers/bus/mhi/host/trace.h
> @@ -0,0 +1,280 @@
> +/* 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>
> +#include <linux/trace_seq.h>
> +#include "../common.h"
> +#include "internal.h"
> +
> +#undef mhi_state
> +#undef mhi_state_end
> +
> +#define mhi_state(a, b)		TRACE_DEFINE_ENUM(MHI_STATE_##a);
> +#define mhi_state_end(a, b)	TRACE_DEFINE_ENUM(MHI_STATE_##a);
> +
> +MHI_STATE_LIST
> +
> +#undef mhi_state
> +#undef mhi_state_end
> +
> +#define mhi_state(a, b)		{ MHI_STATE_##a, b },
> +#define mhi_state_end(a, b)	{ MHI_STATE_##a, b }
> +
> +#undef mhi_pm_state
> +#undef mhi_pm_state_end
> +
> +#define mhi_pm_state(a, b)		TRACE_DEFINE_ENUM(MHI_PM_STATE_##a);
> +#define mhi_pm_state_end(a, b)		TRACE_DEFINE_ENUM(MHI_PM_STATE_##a);
> +
> +MHI_PM_STATE_LIST
> +
> +#undef mhi_pm_state
> +#undef mhi_pm_state_end
> +
> +#define mhi_pm_state(a, b)		{ MHI_PM_STATE_##a, b },
> +#define mhi_pm_state_end(a, b)		{ MHI_PM_STATE_##a, b }
> +
> +#undef mhi_ee
> +#undef mhi_ee_end
> +
> +#define mhi_ee(a, b)			TRACE_DEFINE_ENUM(MHI_EE_##a);
> +#define mhi_ee_end(a, b)		TRACE_DEFINE_ENUM(MHI_EE_##a);
> +
> +MHI_EE_LIST
> +
> +#undef mhi_ee
> +#undef mhi_ee_end
> +
> +#define mhi_ee(a, b)			{ MHI_EE_##a, b },
> +#define mhi_ee_end(a, b)		{ MHI_EE_##a, b }
> +
> +#undef ch_state_type
> +#undef ch_state_type_end
> +
> +#define ch_state_type(a, b)		TRACE_DEFINE_ENUM(MHI_CH_STATE_TYPE_##a);
> +#define ch_state_type_end(a, b)		TRACE_DEFINE_ENUM(MHI_CH_STATE_TYPE_##a);
> +
> +MHI_CH_STATE_TYPE_LIST
> +
> +#undef ch_state_type
> +#undef ch_state_type_end
> +
> +#define ch_state_type(a, b)		{ MHI_CH_STATE_TYPE_##a, b },
> +#define ch_state_type_end(a, b)		{ MHI_CH_STATE_TYPE_##a, b }
> +
> +#undef dev_st_trans
> +#undef dev_st_trans_end
> +
> +#define dev_st_trans(a, b)		TRACE_DEFINE_ENUM(DEV_ST_TRANSITION_##a);
> +#define dev_st_trans_end(a, b)		TRACE_DEFINE_ENUM(DEV_ST_TRANSITION_##a);
> +
> +DEV_ST_TRANSITION_LIST
> +
> +#undef dev_st_trans
> +#undef dev_st_trans_end
> +
> +#define dev_st_trans(a, b)		{ DEV_ST_TRANSITION_##a, b },
> +#define dev_st_trans_end(a, b)		{ DEV_ST_TRANSITION_##a, b }
> +
> +TRACE_EVENT(mhi_gen_tre,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
> +		 struct mhi_ring_element *mhi_tre),
> +
> +	TP_ARGS(mhi_cntrl, mhi_chan, mhi_tre),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(int, ch_num)
> +		__field(void *, wp)
> +		__field(__le64, tre_ptr)
> +		__field(__le32, dword0)
> +		__field(__le32, dword1)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		__entry->ch_num = mhi_chan->chan;
> +		__entry->wp = mhi_tre;
> +		__entry->tre_ptr = mhi_tre->ptr;
> +		__entry->dword0 = mhi_tre->dword[0];
> +		__entry->dword1 = mhi_tre->dword[1];
> +	),
> +
> +	TP_printk("%s: Chan: %d TRE: 0x%p TRE buf: 0x%llx DWORD0: 0x%08x DWORD1: 0x%08x\n",
> +		  __get_str(name), __entry->ch_num, __entry->wp, __entry->tre_ptr,
> +		  __entry->dword0, __entry->dword1)
> +);
> +
> +TRACE_EVENT(mhi_intvec_states,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, int dev_ee, int dev_state),
> +
> +	TP_ARGS(mhi_cntrl, dev_ee, dev_state),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(int, local_ee)
> +		__field(int, state)
> +		__field(int, dev_ee)
> +		__field(int, dev_state)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		__entry->local_ee = mhi_cntrl->ee;
> +		__entry->state = mhi_cntrl->dev_state;
> +		__entry->dev_ee = dev_ee;
> +		__entry->dev_state = dev_state;
> +	),
> +
> +	TP_printk("%s: Local EE: %s State: %s Device EE: %s Dev State: %s\n",
> +		  __get_str(name),
> +		  __print_symbolic(__entry->local_ee, MHI_EE_LIST),
> +		  __print_symbolic(__entry->state, MHI_STATE_LIST),
> +		  __print_symbolic(__entry->dev_ee, MHI_EE_LIST),
> +		  __print_symbolic(__entry->dev_state, MHI_STATE_LIST))
> +);
> +
> +TRACE_EVENT(mhi_tryset_pm_state,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, int pm_state),
> +
> +	TP_ARGS(mhi_cntrl, pm_state),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(int, pm_state)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		if (pm_state)
> +			pm_state = __fls(pm_state);
> +		__entry->pm_state = pm_state;
> +	),
> +
> +	TP_printk("%s: PM state: %s\n", __get_str(name),
> +		  __print_symbolic(__entry->pm_state, MHI_PM_STATE_LIST))
> +);
> +
> +DECLARE_EVENT_CLASS(mhi_process_event_ring,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_ring_element *rp),
> +
> +	TP_ARGS(mhi_cntrl, rp),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(__le32, dword0)
> +		__field(__le32, dword1)
> +		__field(int, state)
> +		__field(__le64, ptr)
> +		__field(void *, rp)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		__entry->rp = rp;
> +		__entry->ptr = rp->ptr;
> +		__entry->dword0 = rp->dword[0];
> +		__entry->dword1 = rp->dword[1];
> +		__entry->state = MHI_TRE_GET_EV_STATE(rp);
> +	),
> +
> +	TP_printk("%s: TRE: 0x%p TRE buf: 0x%llx DWORD0: 0x%08x DWORD1: 0x%08x State: %s\n",
> +		  __get_str(name), __entry->rp, __entry->ptr, __entry->dword0,
> +		  __entry->dword1, __print_symbolic(__entry->state, MHI_STATE_LIST))
> +);
> +
> +DEFINE_EVENT(mhi_process_event_ring, mhi_data_event,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_ring_element *rp),
> +
> +	TP_ARGS(mhi_cntrl, rp)
> +);
> +
> +DEFINE_EVENT(mhi_process_event_ring, mhi_ctrl_event,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_ring_element *rp),
> +
> +	TP_ARGS(mhi_cntrl, rp)
> +);
> +
> +DECLARE_EVENT_CLASS(mhi_update_channel_state,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, int state,
> +		 const char *reason),
> +
> +	TP_ARGS(mhi_cntrl, mhi_chan, state, reason),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(int, ch_num)
> +		__field(int, state)
> +		__field(const char *, reason)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		__entry->ch_num = mhi_chan->chan;
> +		__entry->state = state;
> +		__entry->reason = reason;
> +	),
> +
> +	TP_printk("%s: chan%d: %s state to: %s\n",
> +		  __get_str(name),  __entry->ch_num, __entry->reason,
> +		  __print_symbolic(__entry->state, MHI_CH_STATE_TYPE_LIST))
> +);
> +
> +DEFINE_EVENT(mhi_update_channel_state, mhi_channel_command_start,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, int state,
> +		 const char *reason),
> +
> +	TP_ARGS(mhi_cntrl, mhi_chan, state, reason)
> +);
> +
> +DEFINE_EVENT(mhi_update_channel_state, mhi_channel_command_end,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, int state,
> +		 const char *reason),
> +
> +	TP_ARGS(mhi_cntrl, mhi_chan, state, reason)
> +);
> +
> +TRACE_EVENT(mhi_pm_st_transition,
> +
> +	TP_PROTO(struct mhi_controller *mhi_cntrl, int state),
> +
> +	TP_ARGS(mhi_cntrl, state),
> +
> +	TP_STRUCT__entry(
> +		__string(name, mhi_cntrl->mhi_dev->name)
> +		__field(int, state)
> +	),
> +
> +	TP_fast_assign(
> +		__assign_str(name, mhi_cntrl->mhi_dev->name);
> +		__entry->state = state;
> +	),
> +
> +	TP_printk("%s: Handling state transition: %s\n", __get_str(name),
> +		  __print_symbolic(__entry->state, DEV_ST_TRANSITION_LIST))
> +);
> +
> +#endif
> +#undef TRACE_INCLUDE_PATH
> +#define TRACE_INCLUDE_PATH ../../drivers/bus/mhi/host
> +#undef TRACE_INCLUDE_FILE
> +#define TRACE_INCLUDE_FILE trace
> +
> +#include <trace/define_trace.h>
> 
> ---
> base-commit: ae1d892d518af5c092f2b1f8e6921996c6a95cb3
> change-id: 20240206-ftrace_support-8ef0fbecf85e
> 
> Best regards,
> -- 
> Krishna chaitanya chundru <quic_krichai@quicinc.com>
> 

-- 
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