Messages in this thread | | | Date | Tue, 17 Oct 2023 14:38:36 +0530 | Subject | Re: [PATCH v2] bus: mhi: host: Add tracing support | From | Krishna Chaitanya Chundru <> |
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On 10/16/2023 8:43 PM, Steven Rostedt wrote: > On Fri, 13 Oct 2023 15:22:19 +0530 > Krishna chaitanya chundru <quic_krichai@quicinc.com> wrote: > >> +++ b/include/trace/events/mhi_host.h >> @@ -0,0 +1,287 @@ >> +/* 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> >> +#define MHI_STATE \ >> + EM(MHI_STATE_RESET, "RESET") \ >> + EM(MHI_STATE_READY, "READY") \ >> + EM(MHI_STATE_M0, "M0") \ >> + EM(MHI_STATE_M1, "M1") \ >> + EM(MHI_STATE_M2, "M2") \ >> + EM(MHI_STATE_M3, "M3") \ >> + EM(MHI_STATE_M3_FAST, "M3 FAST") \ >> + EM(MHI_STATE_BHI, "BHI") \ >> + EMe(MHI_STATE_SYS_ERR, "SYS ERROR") >> + >> +#define MHI_EE \ >> + EM(MHI_EE_PBL, "PRIMARY BOOTLOADER") \ >> + EM(MHI_EE_SBL, "SECONDARY BOOTLOADER") \ >> + EM(MHI_EE_AMSS, "MISSION MODE") \ >> + EM(MHI_EE_RDDM, "RAMDUMP DOWNLOAD MODE") \ >> + EM(MHI_EE_WFW, "WLAN FIRMWARE") \ >> + EM(MHI_EE_PTHRU, "PASS THROUGH") \ >> + EM(MHI_EE_EDL, "EMERGENCY DOWNLOAD") \ >> + EM(MHI_EE_FP, "FLASH PROGRAMMER") \ >> + EM(MHI_EE_DISABLE_TRANSITION, "DISABLE") \ >> + EMe(MHI_EE_NOT_SUPPORTED, "NOT SUPPORTED") >> + >> +#define MHI_PM_STATE \ >> + EM(MHI_PM_STATE_DISABLE, "DISABLE") \ >> + EM(MHI_PM_STATE_POR, "POWER ON RESET") \ >> + EM(MHI_PM_STATE_M0, "M0") \ >> + EM(MHI_PM_STATE_M2, "M2") \ >> + EM(MHI_PM_STATE_M3_ENTER, "M?->M3") \ >> + EM(MHI_PM_STATE_M3, "M3") \ >> + EM(MHI_PM_STATE_M3_EXIT, "M3->M0") \ >> + EM(MHI_PM_STATE_FW_DL_ERR, "Firmware Download Error") \ >> + EM(MHI_PM_STATE_SYS_ERR_DETECT, "SYS ERROR Detect") \ >> + EM(MHI_PM_STATE_SYS_ERR_PROCESS, "SYS ERROR Process") \ >> + EM(MHI_PM_STATE_SHUTDOWN_PROCESS, "SHUTDOWN Process") \ >> + EMe(MHI_PM_STATE_LD_ERR_FATAL_DETECT, "Linkdown or Error Fatal Detect") >> + >> +#define MHI_CH_STATE \ >> + EM(MHI_CH_STATE_TYPE_RESET, "RESET") \ >> + EM(MHI_CH_STATE_TYPE_STOP, "STOP") \ >> + EMe(MHI_CH_STATE_TYPE_START, "START") >> + >> +#define MHI_DEV_ST_TRANSITION \ >> + EM(DEV_ST_TRANSITION_PBL, "PBL") \ >> + EM(DEV_ST_TRANSITION_READY, "READY") \ >> + EM(DEV_ST_TRANSITION_SBL, "SBL") \ >> + EM(DEV_ST_TRANSITION_MISSION_MODE, "MISSION MODE") \ >> + EM(DEV_ST_TRANSITION_FP, "FLASH PROGRAMMER") \ >> + EM(DEV_ST_TRANSITION_SYS_ERR, "SYS ERROR") \ >> + EMe(DEV_ST_TRANSITION_DISABLE, "DISABLE") >> + >> +/* Enums require being exported to userspace, for user tool parsing */ >> +#undef EM >> +#undef EMe >> +#define EM(a, b) TRACE_DEFINE_ENUM(a); >> +#define EMe(a, b) TRACE_DEFINE_ENUM(a); >> + >> +MHI_STATE >> +MHI_EE >> +MHI_PM_STATE >> +MHI_CH_STATE >> +MHI_DEV_ST_TRANSITION >> + >> +/* >> + * Now redefine the EM() and EMe() macros to map the enums to the strings >> + * that will be printed in the output. >> + */ >> +#undef EM >> +#undef EMe >> +#define EM(a, b) {a, b}, >> +#define EMe(a, b) {a, b} >> + >> +TRACE_EVENT(mhi_gen_tre, >> + >> + TP_PROTO(const char *name, int ch_num, u64 wp, __le64 tre_ptr, >> + __le32 dword0, __le32 dword1), >> + >> + TP_ARGS(name, ch_num, wp, tre_ptr, dword0, dword1), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, ch_num) > This is fine as __string() is four bytes in the event (2 bytes for offset > where the string exists, and 2 bytes for its length). > >> + __field(u64, wp) >> + __field(__le64, tre_ptr) > Which makes the two 8 byte fields aligned. Good! > >> + __field(__le32, dword0) >> + __field(__le32, 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, int local_ee, int state, int dev_ee, int dev_state), >> + >> + TP_ARGS(name, local_ee, state, dev_ee, dev_state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, local_ee) >> + __field(int, state) >> + __field(int, dev_ee) >> + __field(int, dev_state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, name); >> + __entry->local_ee = local_ee; >> + __entry->state = state; >> + __entry->dev_ee = dev_ee; >> + __entry->dev_state = dev_state; >> + ), >> + >> + TP_printk("%s: local ee: %s state: %s device ee: %s state: %s\n", >> + __get_str(name), >> + __print_symbolic(__entry->local_ee, MHI_EE), >> + __print_symbolic(__entry->state, MHI_STATE), >> + __print_symbolic(__entry->dev_ee, MHI_EE), >> + __print_symbolic(__entry->dev_state, MHI_STATE)) >> +); >> + >> +TRACE_EVENT(mhi_tryset_pm_state, >> + >> + TP_PROTO(const char *name, int pm_state), >> + >> + TP_ARGS(name, pm_state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, pm_state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, 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)) >> +); >> + >> +TRACE_EVENT(mhi_process_data_event_ring, >> + >> + TP_PROTO(const char *name, __le64 ptr, __le32 dword0, __le32 dword1), >> + >> + TP_ARGS(name, ptr, dword0, dword1), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(__le64, ptr) > Here, I would switch the __field(__le64, ptr) with the __string(). > > __field(__le64, ptr) > __string(name, name) > > otherwise you just created a 4 byte hole in the ring buffer, wasting > precious ring buffer space. > >> + __field(__le32, dword0) >> + __field(__le32, 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, __le64 ptr, __le32 dword0, __le32 dword1, int state), >> + >> + TP_ARGS(name, rp, ptr, dword0, dword1, state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(u64, rp) >> + __field(__le64, ptr) > I would move __string(name, name) here (after the two 8 byte fields). > > -- Steve
I will reoder as suggested in my next patch.
-- KC.
>> + __field(__le32, dword0) >> + __field(__le32, dword1) >> + __field(int, state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, name); >> + __entry->rp = rp; >> + __entry->ptr = ptr; >> + __entry->dword0 = dword0; >> + __entry->dword1 = dword1; >> + __entry->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, __print_symbolic(__entry->state, MHI_STATE)) >> +); >> + >> +TRACE_EVENT(mhi_update_channel_state_start, >> + >> + TP_PROTO(const char *name, int ch_num, int state), >> + >> + TP_ARGS(name, ch_num, state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, ch_num) >> + __field(int, state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, name); >> + __entry->ch_num = ch_num; >> + __entry->state = state; >> + ), >> + >> + TP_printk("%s: ch%d: Updating state to: %s\n", >> + __get_str(name), __entry->ch_num, >> + __print_symbolic(__entry->state, MHI_CH_STATE)) >> +); >> + >> +TRACE_EVENT(mhi_update_channel_state_end, >> + >> + TP_PROTO(const char *name, int ch_num, int state), >> + >> + TP_ARGS(name, ch_num, state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, ch_num) >> + __field(int, state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, name); >> + __entry->ch_num = ch_num; >> + __entry->state = state; >> + ), >> + >> + TP_printk("%s: ch%d: Updated state to: %s\n", >> + __get_str(name), __entry->ch_num, >> + __print_symbolic(__entry->state, MHI_CH_STATE)) >> +); >> + >> +TRACE_EVENT(mhi_pm_st_transition, >> + >> + TP_PROTO(const char *name, int state), >> + >> + TP_ARGS(name, state), >> + >> + TP_STRUCT__entry( >> + __string(name, name) >> + __field(int, state) >> + ), >> + >> + TP_fast_assign( >> + __assign_str(name, name); >> + __entry->state = state; >> + ), >> + >> + TP_printk("%s: Handling state transition: %s\n", __get_str(name), >> + __print_symbolic(__entry->state, MHI_DEV_ST_TRANSITION)) >> +); >> + >> +#endif >> +#include <trace/define_trace.h>
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