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From: Tingwei Zhang <tingwei@codeaurora.org>
To: Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: tsoni@codeaurora.org,
	Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
	Kim Phillips <kim.phillips@arm.com>,
	Mao Jinlong <jinlmao@codeaurora.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	coresight@lists.linaro.org, Randy Dunlap <rdunlap@infradead.org>,
	Mian Yousaf Kaukab <ykaukab@suse.de>,
	Russell King <linux@armlinux.org.uk>,
	Tingwei Zhang <tingwei@codeaurora.org>,
	Leo Yan <leo.yan@linaro.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v1 17/21] coresight: tmc-etr: add function to register catu ops
Date: Wed,  1 Jul 2020 15:14:23 +0800	[thread overview]
Message-ID: <20200701071427.10477-18-tingwei@codeaurora.org> (raw)
In-Reply-To: <20200701071427.10477-1-tingwei@codeaurora.org>

From: Mian Yousaf Kaukab <ykaukab@suse.de>

Make etr_catu_buf_ops static. Instead of directly accessing it in
etr_buf_ops[], add a function to let catu driver register the ops at
runtime. Break circular dependency between tmc-etr and catu drivers.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight-catu.c  | 22 +++++++++++++++++--
 drivers/hwtracing/coresight/coresight-catu.h  |  2 --
 .../hwtracing/coresight/coresight-tmc-etr.c   | 15 +++++++++++--
 drivers/hwtracing/coresight/coresight-tmc.h   |  3 +++
 4 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 16ebf38a9f66..9d51df7d08f9 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -358,7 +358,7 @@ static int catu_alloc_etr_buf(struct tmc_drvdata *tmc_drvdata,
 	return 0;
 }
 
-const struct etr_buf_operations etr_catu_buf_ops = {
+static const struct etr_buf_operations etr_catu_buf_ops = {
 	.alloc = catu_alloc_etr_buf,
 	.free = catu_free_etr_buf,
 	.sync = catu_sync_etr_buf,
@@ -585,4 +585,22 @@ static struct amba_driver catu_driver = {
 	.id_table			= catu_ids,
 };
 
-builtin_amba_driver(catu_driver);
+static int __init catu_init(void)
+{
+	int ret;
+
+	ret = amba_driver_register(&catu_driver);
+	if (ret)
+		pr_info("Error registering catu driver\n");
+	tmc_etr_set_catu_ops(&etr_catu_buf_ops);
+	return ret;
+}
+
+static void __exit catu_exit(void)
+{
+	tmc_etr_remove_catu_ops();
+	amba_driver_unregister(&catu_driver);
+}
+
+module_init(catu_init);
+module_exit(catu_exit);
diff --git a/drivers/hwtracing/coresight/coresight-catu.h b/drivers/hwtracing/coresight/coresight-catu.h
index 80ceee3c739c..6160c2d75a56 100644
--- a/drivers/hwtracing/coresight/coresight-catu.h
+++ b/drivers/hwtracing/coresight/coresight-catu.h
@@ -108,6 +108,4 @@ static inline bool coresight_is_catu_device(struct coresight_device *csdev)
 	return true;
 }
 
-extern const struct etr_buf_operations etr_catu_buf_ops;
-
 #endif
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index b86c76ae26b9..8f84f294d0d8 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -794,10 +794,21 @@ static inline void tmc_etr_disable_catu(struct tmc_drvdata *drvdata)
 static const struct etr_buf_operations *etr_buf_ops[] = {
 	[ETR_MODE_FLAT] = &etr_flat_buf_ops,
 	[ETR_MODE_ETR_SG] = &etr_sg_buf_ops,
-	[ETR_MODE_CATU] = IS_ENABLED(CONFIG_CORESIGHT_CATU)
-						? &etr_catu_buf_ops : NULL,
+	[ETR_MODE_CATU] = NULL,
 };
 
+void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu)
+{
+	etr_buf_ops[ETR_MODE_CATU] = catu;
+}
+EXPORT_SYMBOL_GPL(tmc_etr_set_catu_ops);
+
+void tmc_etr_remove_catu_ops(void)
+{
+	etr_buf_ops[ETR_MODE_CATU] = NULL;
+}
+EXPORT_SYMBOL_GPL(tmc_etr_remove_catu_ops);
+
 static inline int tmc_etr_mode_alloc_buf(int mode,
 					 struct tmc_drvdata *drvdata,
 					 struct etr_buf *etr_buf, int node,
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 71de978575f3..db431e230a40 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -325,4 +325,7 @@ tmc_sg_table_buf_size(struct tmc_sg_table *sg_table)
 
 struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvdata);
 
+void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu);
+void tmc_etr_remove_catu_ops(void);
+
 #endif
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


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  parent reply	other threads:[~2020-07-01  7:19 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  7:14 [PATCH v1 00/21] coresight: allow to build coresight as modules Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 01/21] coresight: cpu_debug: add module name in Kconfig Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 02/21] coresight: cpu_debug: define MODULE_DEVICE_TABLE Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 03/21] coresight: use IS_ENABLED for CONFIGs that may be modules Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 04/21] coresight: add coresight prefix to barrier_pkt Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 05/21] coresight: export global symbols Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 06/21] Allow to build coresight-stm as a module, for ease of development Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 07/21] coresight: allow etm3x to be built as a module Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 08/21] coresight: allow etm4x " Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 09/21] coresight: allow etb " Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 10/21] coresight: allow tpiu " Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 11/21] coresight: allow tmc " Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 12/21] coresight: remove multiple init calls from funnel driver Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 13/21] coresight: remove multiple init calls from replicator driver Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 14/21] coresight: allow funnel and replicator drivers to be built as modules Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 15/21] coresight: cti: add function to register cti associate ops Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 16/21] coresight: allow cti to be built as a module Tingwei Zhang
2020-07-01  7:14 ` Tingwei Zhang [this message]
2020-07-01  7:14 ` [PATCH v1 18/21] coresight: allow catu drivers to be built as modules Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 19/21] coresight: disable trace path with device being removed Tingwei Zhang
2020-07-13 22:11   ` Mathieu Poirier
2020-07-14  1:10     ` tingwei
2020-07-01  7:14 ` [PATCH v1 20/21] coresight: allow the coresight core driver to be built as a module Tingwei Zhang
2020-07-01  7:14 ` [PATCH v1 21/21] coresight: perf: clean up perf event on device unregister path Tingwei Zhang

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