linux-kernel - [PATCH 1/6] perf cs-etm: Refactor initialisation of decoder params.

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Message-Id: <20210721090706.21523-2-james.clark@arm.com>
Date:   Wed, 21 Jul 2021 10:07:00 +0100
From:   James Clark <james.clark@....com>
To:     acme@...nel.org, mathieu.poirier@...aro.org,
        coresight@...ts.linaro.org
Cc:     leo.yan@...aro.org, al.grant@....com, suzuki.poulose@....com,
        anshuman.khandual@....com, mike.leach@...aro.org,
        James Clark <james.clark@....com>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 1/6] perf cs-etm: Refactor initialisation of decoder params.

The initialisation of the decoder params is duplicated between
creation of the packet printer and packet decoder. Put them both
into one function so that future changes only need to be made in one
place.

Signed-off-by: James Clark <james.clark@....com>
---
 .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 99 +++++--------------
 1 file changed, 25 insertions(+), 74 deletions(-)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index ed1f0326f859..30889a9d0165 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -227,55 +227,6 @@ cs_etm_decoder__init_raw_frame_logging(
 }
 #endif
 
-static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder,
-						 const char *decoder_name,
-						 void *trace_config)
-{
-	u8 csid;
-
-	if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name,
-				   OCSD_CREATE_FLG_PACKET_PROC,
-				   trace_config, &csid))
-		return -1;
-
-	if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
-		return -1;
-
-	return 0;
-}
-
-static int
-cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params,
-					  struct cs_etm_decoder *decoder)
-{
-	const char *decoder_name;
-	ocsd_etmv3_cfg config_etmv3;
-	ocsd_etmv4_cfg trace_config_etmv4;
-	void *trace_config;
-
-	switch (t_params->protocol) {
-	case CS_ETM_PROTO_ETMV3:
-	case CS_ETM_PROTO_PTM:
-		cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);
-		decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ?
-							OCSD_BUILTIN_DCD_ETMV3 :
-							OCSD_BUILTIN_DCD_PTM;
-		trace_config = &config_etmv3;
-		break;
-	case CS_ETM_PROTO_ETMV4i:
-		cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
-		decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
-		trace_config = &trace_config_etmv4;
-		break;
-	default:
-		return -1;
-	}
-
-	return cs_etm_decoder__create_packet_printer(decoder,
-						     decoder_name,
-						     trace_config);
-}
-
 static ocsd_datapath_resp_t
 cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq,
 				  struct cs_etm_packet_queue *packet_queue,
@@ -629,9 +580,10 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
 	return resp;
 }
 
-static int cs_etm_decoder__create_etm_packet_decoder(
-					struct cs_etm_trace_params *t_params,
-					struct cs_etm_decoder *decoder)
+static int
+cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
+				   struct cs_etm_trace_params *t_params,
+				   struct cs_etm_decoder *decoder)
 {
 	const char *decoder_name;
 	ocsd_etmv3_cfg config_etmv3;
@@ -657,31 +609,30 @@ static int cs_etm_decoder__create_etm_packet_decoder(
 		return -1;
 	}
 
-	if (ocsd_dt_create_decoder(decoder->dcd_tree,
-				     decoder_name,
-				     OCSD_CREATE_FLG_FULL_DECODER,
-				     trace_config, &csid))
-		return -1;
+	if (d_params->operation == CS_ETM_OPERATION_DECODE) {
+		if (ocsd_dt_create_decoder(decoder->dcd_tree,
+					   decoder_name,
+					   OCSD_CREATE_FLG_FULL_DECODER,
+					   trace_config, &csid))
+			return -1;
 
-	if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,
-				       cs_etm_decoder__gen_trace_elem_printer,
-				       decoder))
-		return -1;
+		if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,
+					       cs_etm_decoder__gen_trace_elem_printer,
+					       decoder))
+			return -1;
 
-	return 0;
-}
+		return 0;
+	} else if (d_params->operation == CS_ETM_OPERATION_PRINT) {
+		if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name,
+					   OCSD_CREATE_FLG_PACKET_PROC,
+					   trace_config, &csid))
+			return -1;
 
-static int
-cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
-				   struct cs_etm_trace_params *t_params,
-				   struct cs_etm_decoder *decoder)
-{
-	if (d_params->operation == CS_ETM_OPERATION_PRINT)
-		return cs_etm_decoder__create_etm_packet_printer(t_params,
-								 decoder);
-	else if (d_params->operation == CS_ETM_OPERATION_DECODE)
-		return cs_etm_decoder__create_etm_packet_decoder(t_params,
-								 decoder);
+		if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
+			return -1;
+
+		return 0;
+	}
 
 	return -1;
 }
-- 
2.28.0