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f7733625ec
Currently, exception event status can be read from wExceptionEventStatus
attribute (sysfs file attributes/exception_event_status under the UFS host
controller device directory). Polling that attribute to track UFS exception
events is impractical, so add a tracepoint to track exception events for
testing and debugging purposes.
Note, by the time the exception event status is read, the exception event
may have cleared, so the value can be zero - see example below.
Note also, only enabled exception events can be reported. A subsequent
patch adds the ability for users to enable selected exception events via
debugfs.
Example with driver instrumented to enable all exception events:
# echo 1 > /sys/kernel/debug/tracing/events/ufs/ufshcd_exception_event/enable
... do some I/O ...
# cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 3/3 #P:5
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# ||| / delay
# TASK-PID CPU# |||| TIMESTAMP FUNCTION
# | | | |||| | |
kworker/2:2-173 [002] .... 731.486419: ufshcd_exception_event: 0000:00:12.5: status 0x0
kworker/2:2-173 [002] .... 732.608918: ufshcd_exception_event: 0000:00:12.5: status 0x4
kworker/2:2-173 [002] .... 732.609312: ufshcd_exception_event: 0000:00:12.5: status 0x4
Link: https://lore.kernel.org/r/20210209062437.6954-2-adrian.hunter@intel.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
377 lines
9.9 KiB
C
377 lines
9.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM ufs
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#if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_UFS_H
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#include <linux/tracepoint.h>
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#define str_opcode(opcode) \
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__print_symbolic(opcode, \
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{ WRITE_16, "WRITE_16" }, \
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{ WRITE_10, "WRITE_10" }, \
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{ READ_16, "READ_16" }, \
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{ READ_10, "READ_10" }, \
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{ SYNCHRONIZE_CACHE, "SYNC" }, \
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{ UNMAP, "UNMAP" })
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#define UFS_LINK_STATES \
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EM(UIC_LINK_OFF_STATE, "UIC_LINK_OFF_STATE") \
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EM(UIC_LINK_ACTIVE_STATE, "UIC_LINK_ACTIVE_STATE") \
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EMe(UIC_LINK_HIBERN8_STATE, "UIC_LINK_HIBERN8_STATE")
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#define UFS_PWR_MODES \
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EM(UFS_ACTIVE_PWR_MODE, "UFS_ACTIVE_PWR_MODE") \
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EM(UFS_SLEEP_PWR_MODE, "UFS_SLEEP_PWR_MODE") \
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EM(UFS_POWERDOWN_PWR_MODE, "UFS_POWERDOWN_PWR_MODE") \
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EMe(UFS_DEEPSLEEP_PWR_MODE, "UFS_DEEPSLEEP_PWR_MODE")
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#define UFSCHD_CLK_GATING_STATES \
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EM(CLKS_OFF, "CLKS_OFF") \
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EM(CLKS_ON, "CLKS_ON") \
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EM(REQ_CLKS_OFF, "REQ_CLKS_OFF") \
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EMe(REQ_CLKS_ON, "REQ_CLKS_ON")
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#define UFS_CMD_TRACE_STRINGS \
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EM(UFS_CMD_SEND, "send_req") \
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EM(UFS_CMD_COMP, "complete_rsp") \
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EM(UFS_DEV_COMP, "dev_complete") \
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EM(UFS_QUERY_SEND, "query_send") \
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EM(UFS_QUERY_COMP, "query_complete") \
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EM(UFS_QUERY_ERR, "query_complete_err") \
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EM(UFS_TM_SEND, "tm_send") \
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EM(UFS_TM_COMP, "tm_complete") \
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EMe(UFS_TM_ERR, "tm_complete_err")
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#define UFS_CMD_TRACE_TSF_TYPES \
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EM(UFS_TSF_CDB, "CDB") \
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EM(UFS_TSF_OSF, "OSF") \
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EM(UFS_TSF_TM_INPUT, "TM_INPUT") \
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EMe(UFS_TSF_TM_OUTPUT, "TM_OUTPUT")
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/* Enums require being exported to userspace, for user tool parsing */
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#undef EM
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#undef EMe
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define EMe(a, b) TRACE_DEFINE_ENUM(a);
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UFS_LINK_STATES;
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UFS_PWR_MODES;
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UFSCHD_CLK_GATING_STATES;
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UFS_CMD_TRACE_STRINGS
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UFS_CMD_TRACE_TSF_TYPES
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/*
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* Now redefine the EM() and EMe() macros to map the enums to the strings
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* that will be printed in the output.
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*/
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#undef EM
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#undef EMe
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#define EM(a, b) {a, b},
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#define EMe(a, b) {a, b}
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#define show_ufs_cmd_trace_str(str_t) \
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__print_symbolic(str_t, UFS_CMD_TRACE_STRINGS)
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#define show_ufs_cmd_trace_tsf(tsf) \
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__print_symbolic(tsf, UFS_CMD_TRACE_TSF_TYPES)
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TRACE_EVENT(ufshcd_clk_gating,
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TP_PROTO(const char *dev_name, int state),
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TP_ARGS(dev_name, state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(int, state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->state = state;
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),
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TP_printk("%s: gating state changed to %s",
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__get_str(dev_name),
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__print_symbolic(__entry->state, UFSCHD_CLK_GATING_STATES))
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);
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TRACE_EVENT(ufshcd_clk_scaling,
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TP_PROTO(const char *dev_name, const char *state, const char *clk,
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u32 prev_state, u32 curr_state),
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TP_ARGS(dev_name, state, clk, prev_state, curr_state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(state, state)
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__string(clk, clk)
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__field(u32, prev_state)
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__field(u32, curr_state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__assign_str(state, state);
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__assign_str(clk, clk);
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__entry->prev_state = prev_state;
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__entry->curr_state = curr_state;
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),
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TP_printk("%s: %s %s from %u to %u Hz",
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__get_str(dev_name), __get_str(state), __get_str(clk),
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__entry->prev_state, __entry->curr_state)
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);
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TRACE_EVENT(ufshcd_auto_bkops_state,
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TP_PROTO(const char *dev_name, const char *state),
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TP_ARGS(dev_name, state),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(state, state)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__assign_str(state, state);
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),
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TP_printk("%s: auto bkops - %s",
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__get_str(dev_name), __get_str(state))
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);
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DECLARE_EVENT_CLASS(ufshcd_profiling_template,
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TP_PROTO(const char *dev_name, const char *profile_info, s64 time_us,
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int err),
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TP_ARGS(dev_name, profile_info, time_us, err),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(profile_info, profile_info)
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__field(s64, time_us)
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__field(int, err)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__assign_str(profile_info, profile_info);
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__entry->time_us = time_us;
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__entry->err = err;
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),
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TP_printk("%s: %s: took %lld usecs, err %d",
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__get_str(dev_name), __get_str(profile_info),
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__entry->time_us, __entry->err)
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);
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DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_hibern8,
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TP_PROTO(const char *dev_name, const char *profile_info, s64 time_us,
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int err),
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TP_ARGS(dev_name, profile_info, time_us, err));
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DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_clk_gating,
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TP_PROTO(const char *dev_name, const char *profile_info, s64 time_us,
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int err),
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TP_ARGS(dev_name, profile_info, time_us, err));
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DEFINE_EVENT(ufshcd_profiling_template, ufshcd_profile_clk_scaling,
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TP_PROTO(const char *dev_name, const char *profile_info, s64 time_us,
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int err),
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TP_ARGS(dev_name, profile_info, time_us, err));
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DECLARE_EVENT_CLASS(ufshcd_template,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state),
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TP_STRUCT__entry(
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__field(s64, usecs)
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__field(int, err)
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__string(dev_name, dev_name)
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__field(int, dev_state)
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__field(int, link_state)
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),
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TP_fast_assign(
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__entry->usecs = usecs;
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__entry->err = err;
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__assign_str(dev_name, dev_name);
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__entry->dev_state = dev_state;
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__entry->link_state = link_state;
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),
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TP_printk(
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"%s: took %lld usecs, dev_state: %s, link_state: %s, err %d",
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__get_str(dev_name),
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__entry->usecs,
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__print_symbolic(__entry->dev_state, UFS_PWR_MODES),
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__print_symbolic(__entry->link_state, UFS_LINK_STATES),
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__entry->err
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)
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);
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DEFINE_EVENT(ufshcd_template, ufshcd_system_suspend,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_system_resume,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_runtime_suspend,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_runtime_resume,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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DEFINE_EVENT(ufshcd_template, ufshcd_init,
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TP_PROTO(const char *dev_name, int err, s64 usecs,
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int dev_state, int link_state),
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TP_ARGS(dev_name, err, usecs, dev_state, link_state));
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TRACE_EVENT(ufshcd_command,
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TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t,
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unsigned int tag, u32 doorbell, int transfer_len, u32 intr,
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u64 lba, u8 opcode, u8 group_id),
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TP_ARGS(dev_name, str_t, tag, doorbell, transfer_len,
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intr, lba, opcode, group_id),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(enum ufs_trace_str_t, str_t)
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__field(unsigned int, tag)
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__field(u32, doorbell)
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__field(int, transfer_len)
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__field(u32, intr)
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__field(u64, lba)
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__field(u8, opcode)
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__field(u8, group_id)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->str_t = str_t;
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__entry->tag = tag;
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__entry->doorbell = doorbell;
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__entry->transfer_len = transfer_len;
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__entry->intr = intr;
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__entry->lba = lba;
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__entry->opcode = opcode;
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__entry->group_id = group_id;
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),
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TP_printk(
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"%s: %s: tag: %u, DB: 0x%x, size: %d, IS: %u, LBA: %llu, opcode: 0x%x (%s), group_id: 0x%x",
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show_ufs_cmd_trace_str(__entry->str_t), __get_str(dev_name),
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__entry->tag, __entry->doorbell, __entry->transfer_len,
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__entry->intr, __entry->lba, (u32)__entry->opcode,
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str_opcode(__entry->opcode), (u32)__entry->group_id
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)
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);
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TRACE_EVENT(ufshcd_uic_command,
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TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t, u32 cmd,
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u32 arg1, u32 arg2, u32 arg3),
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TP_ARGS(dev_name, str_t, cmd, arg1, arg2, arg3),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(enum ufs_trace_str_t, str_t)
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__field(u32, cmd)
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__field(u32, arg1)
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__field(u32, arg2)
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__field(u32, arg3)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->str_t = str_t;
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__entry->cmd = cmd;
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__entry->arg1 = arg1;
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__entry->arg2 = arg2;
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__entry->arg3 = arg3;
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),
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TP_printk(
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"%s: %s: cmd: 0x%x, arg1: 0x%x, arg2: 0x%x, arg3: 0x%x",
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show_ufs_cmd_trace_str(__entry->str_t), __get_str(dev_name),
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__entry->cmd, __entry->arg1, __entry->arg2, __entry->arg3
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)
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);
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TRACE_EVENT(ufshcd_upiu,
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TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t, void *hdr,
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void *tsf, enum ufs_trace_tsf_t tsf_t),
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TP_ARGS(dev_name, str_t, hdr, tsf, tsf_t),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(enum ufs_trace_str_t, str_t)
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__array(unsigned char, hdr, 12)
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__array(unsigned char, tsf, 16)
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__field(enum ufs_trace_tsf_t, tsf_t)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->str_t = str_t;
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memcpy(__entry->hdr, hdr, sizeof(__entry->hdr));
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memcpy(__entry->tsf, tsf, sizeof(__entry->tsf));
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__entry->tsf_t = tsf_t;
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),
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TP_printk(
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"%s: %s: HDR:%s, %s:%s",
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show_ufs_cmd_trace_str(__entry->str_t), __get_str(dev_name),
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__print_hex(__entry->hdr, sizeof(__entry->hdr)),
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show_ufs_cmd_trace_tsf(__entry->tsf_t),
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__print_hex(__entry->tsf, sizeof(__entry->tsf))
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)
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);
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TRACE_EVENT(ufshcd_exception_event,
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TP_PROTO(const char *dev_name, u16 status),
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TP_ARGS(dev_name, status),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__field(u16, status)
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),
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TP_fast_assign(
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__assign_str(dev_name, dev_name);
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__entry->status = status;
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),
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TP_printk("%s: status 0x%x",
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__get_str(dev_name), __entry->status
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)
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);
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#endif /* if !defined(_TRACE_UFS_H) || defined(TRACE_HEADER_MULTI_READ) */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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