linux-kernel - Re: [PATCH] soc: qcom: rpmh-rsc: Include state in trace event

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Date:   Wed, 21 Jun 2023 02:36:50 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Maulik Shah <quic_mkshah@...cinc.com>
Cc:     Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: qcom: rpmh-rsc: Include state in trace event

On 21.06.2023 01:00, Bjorn Andersson wrote:
> When tracing messages written to the RSC it's very useful to know the
> type of TCS being targeted, in particular if/when the code borrows a
> WAKE TCS for ACTIVE votes.
> 
> Add the "state" of the message to the traced information.
> 
> While at it, drop the "send-msg:" substring, as this is already captured
> by the trace event itself.
> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> ---
Acked-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  drivers/soc/qcom/rpmh-rsc.c   |  2 +-
>  drivers/soc/qcom/trace-rpmh.h | 16 ++++++++++++----
>  2 files changed, 13 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
> index 0dd4363ebac8..a021dc71807b 100644
> --- a/drivers/soc/qcom/rpmh-rsc.c
> +++ b/drivers/soc/qcom/rpmh-rsc.c
> @@ -516,7 +516,7 @@ static void __tcs_buffer_write(struct rsc_drv *drv, int tcs_id, int cmd_id,
>  		write_tcs_cmd(drv, drv->regs[RSC_DRV_CMD_MSGID], tcs_id, j, msgid);
>  		write_tcs_cmd(drv, drv->regs[RSC_DRV_CMD_ADDR], tcs_id, j, cmd->addr);
>  		write_tcs_cmd(drv, drv->regs[RSC_DRV_CMD_DATA], tcs_id, j, cmd->data);
> -		trace_rpmh_send_msg(drv, tcs_id, j, msgid, cmd);
> +		trace_rpmh_send_msg(drv, tcs_id, msg->state, j, msgid, cmd);
>  	}
>  
>  	cmd_enable |= read_tcs_reg(drv, drv->regs[RSC_DRV_CMD_ENABLE], tcs_id);
> diff --git a/drivers/soc/qcom/trace-rpmh.h b/drivers/soc/qcom/trace-rpmh.h
> index 12b676b20cb2..be6b42ecc1f8 100644
> --- a/drivers/soc/qcom/trace-rpmh.h
> +++ b/drivers/soc/qcom/trace-rpmh.h
> @@ -38,14 +38,15 @@ TRACE_EVENT(rpmh_tx_done,
>  
>  TRACE_EVENT(rpmh_send_msg,
>  
> -	TP_PROTO(struct rsc_drv *d, int m, int n, u32 h,
> +	TP_PROTO(struct rsc_drv *d, int m, enum rpmh_state state, int n, u32 h,
>  		 const struct tcs_cmd *c),
>  
> -	TP_ARGS(d, m, n, h, c),
> +	TP_ARGS(d, m, state, n, h, c),
>  
>  	TP_STRUCT__entry(
>  			 __string(name, d->name)
>  			 __field(int, m)
> +			 __field(u32, state)
>  			 __field(int, n)
>  			 __field(u32, hdr)
>  			 __field(u32, addr)
> @@ -56,6 +57,7 @@ TRACE_EVENT(rpmh_send_msg,
>  	TP_fast_assign(
>  		       __assign_str(name, d->name);
>  		       __entry->m = m;
> +		       __entry->state = state;
>  		       __entry->n = n;
>  		       __entry->hdr = h;
>  		       __entry->addr = c->addr;
> @@ -63,8 +65,14 @@ TRACE_EVENT(rpmh_send_msg,
>  		       __entry->wait = c->wait;
>  	),
>  
> -	TP_printk("%s: send-msg: tcs(m): %d cmd(n): %d msgid: %#x addr: %#x data: %#x complete: %d",
> -		  __get_str(name), __entry->m, __entry->n, __entry->hdr,
> +	TP_printk("%s: tcs(m): %d [%s] cmd(n): %d msgid: %#x addr: %#x data: %#x complete: %d",
> +		  __get_str(name), __entry->m,
> +		  __print_symbolic(__entry->state,
> +				   { RPMH_SLEEP_STATE, "sleep" },
> +				   { RPMH_WAKE_ONLY_STATE, "wake" },
> +				   { RPMH_ACTIVE_ONLY_STATE, "active" }),
> +		  __entry->n,
> +		  __entry->hdr,
>  		  __entry->addr, __entry->data, __entry->wait)
>  );
>