scsi: ufs: Add trace event for UIC commands
Use the ftrace infrastructure to conditionally trace UFS UIC command events. New trace event "ufshcd_uic_command" is created, which samples the following UFS UIC command data: - Device name - Optional identification string - UIC command opcode - UIC command argument1 - UIC command argument2 - UIC command argement3 Usage: echo 1 > /sys/kernel/debug/tracing/events/ufs/enable cat /sys/kernel/debug/tracing/trace_pipe Link: https://lore.kernel.org/r/20200615072235.23042-3-stanley.chu@mediatek.com Acked-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -311,6 +311,26 @@ static void ufshcd_add_tm_upiu_trace(struct ufs_hba *hba, unsigned int tag,
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&descp->input_param1);
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&descp->input_param1);
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}
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}
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static void ufshcd_add_uic_command_trace(struct ufs_hba *hba,
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struct uic_command *ucmd,
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const char *str)
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{
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u32 cmd;
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if (!trace_ufshcd_uic_command_enabled())
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return;
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if (!strcmp(str, "send"))
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cmd = ucmd->command;
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else
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cmd = ufshcd_readl(hba, REG_UIC_COMMAND);
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trace_ufshcd_uic_command(dev_name(hba->dev), str, cmd,
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ufshcd_readl(hba, REG_UIC_COMMAND_ARG_1),
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ufshcd_readl(hba, REG_UIC_COMMAND_ARG_2),
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ufshcd_readl(hba, REG_UIC_COMMAND_ARG_3));
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}
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static void ufshcd_add_command_trace(struct ufs_hba *hba,
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static void ufshcd_add_command_trace(struct ufs_hba *hba,
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unsigned int tag, const char *str)
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unsigned int tag, const char *str)
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{
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{
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@ -2030,6 +2050,8 @@ ufshcd_dispatch_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
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ufshcd_writel(hba, uic_cmd->argument2, REG_UIC_COMMAND_ARG_2);
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ufshcd_writel(hba, uic_cmd->argument2, REG_UIC_COMMAND_ARG_2);
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ufshcd_writel(hba, uic_cmd->argument3, REG_UIC_COMMAND_ARG_3);
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ufshcd_writel(hba, uic_cmd->argument3, REG_UIC_COMMAND_ARG_3);
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ufshcd_add_uic_command_trace(hba, uic_cmd, "send");
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/* Write UIC Cmd */
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/* Write UIC Cmd */
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ufshcd_writel(hba, uic_cmd->command & COMMAND_OPCODE_MASK,
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ufshcd_writel(hba, uic_cmd->command & COMMAND_OPCODE_MASK,
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REG_UIC_COMMAND);
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REG_UIC_COMMAND);
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@ -4835,6 +4857,10 @@ static irqreturn_t ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status)
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complete(hba->uic_async_done);
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complete(hba->uic_async_done);
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retval = IRQ_HANDLED;
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retval = IRQ_HANDLED;
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}
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}
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if (retval == IRQ_HANDLED)
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ufshcd_add_uic_command_trace(hba, hba->active_uic_cmd,
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"complete");
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return retval;
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return retval;
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}
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}
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@ -249,6 +249,37 @@ TRACE_EVENT(ufshcd_command,
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)
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)
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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, const char *str, u32 cmd,
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u32 arg1, u32 arg2, u32 arg3),
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TP_ARGS(dev_name, str, cmd, arg1, arg2, arg3),
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TP_STRUCT__entry(
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__string(dev_name, dev_name)
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__string(str, str)
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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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__assign_str(str, str);
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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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__get_str(str), __get_str(dev_name), __entry->cmd,
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__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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TRACE_EVENT(ufshcd_upiu,
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TP_PROTO(const char *dev_name, const char *str, void *hdr, void *tsf),
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TP_PROTO(const char *dev_name, const char *str, void *hdr, void *tsf),
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