[PATCH v6 00/25] coresight: allow to build coresight as modules

[PATCH v6 00/25] coresight: allow to build coresight as modules

[Tingwei Zhang]

Allow to build coresight as modules. This gives developers the feasibility to
test their code without reboot.

This series is based on below two series.

 - "coresight: allow to build components as modules"
   https://lkml.org/lkml/2018/6/5/989
 - "coresight: make drivers modular"
   https://lkml.org/lkml/2020/1/17/468

Change from v5:
Add below CTI clean up change from Mike into series
 -https://lists.linaro.org/pipermail/coresight/2020-July/004349.html
Increase module reference count when enabling CTI device (Mike)

Change from v4:
Fix error handling in coresight_grab_devicei() (Greg)
Add coresight: cti: Fix remove sysfs link error from Mike
 -https://lists.linaro.org/pipermail/coresight/2020-July/004275.html
Move cti_remove_conn_xrefs() into cti_remove() (Mike)
Align patch subject to coresight: <component>: <description> (Mike)

Change from v3:
Rebase to coresight-next (Mike and Mathieu)
Reorder try_get_module() (Suzuki)
Clean up etmdrvdata[] in device remote path (Mike)
Move cti_remove_conn_xrefs to cti_remove (Mike)

Change from v2:
Rebase to 5.8-rc5. Export coresight_add_sysfs_link and
coresight_remove_sysfs_link
Fix one cut and paste error on MODULE_DESCRIPTION of CTI

Change from v1:
Use try_module_get() to avoid module to be unloaded when device is used
in active trace session. (Mathieu P)

Change from above two series.
This series adds the support to dynamically remove module when the device in
that module is enabled and used by some trace path. It disables all trace
paths with that device and release the trace path.

Kim Phillips (7):
  coresight: use IS_ENABLED for CONFIGs that may be modules
  coresight: etm3x: allow etm3x to be built as a module
  coresight: etm4x: allow etm4x to be built as a module
  coresight: etb: allow etb to be built as a module
  coresight: tpiu: allow tpiu to be built as a module
  coresight: tmc: allow tmc to be built as a module
  coresight: allow funnel and replicator drivers to be built as modules

Mian Yousaf Kaukab (4):
  coresight: export global symbols
  coresight: funnel: remove multiple init calls from funnel driver
  coresight: replicator: remove multiple init calls
  coresight: tmc-etr: add function to register catu ops

Mike Leach (1):
  coresight: cti: Fix remove sysfs link error

Tingwei Zhang (13):
  coresight: cpu_debug: add module name in Kconfig
  coresight: cpu_debug: define MODULE_DEVICE_TABLE
  coresight: add coresight prefix to barrier_pkt
  coresight: add try_get_module() in coresight_grab_device()
  coresight: stm: allow to build coresight-stm as a module
  coresight: etm: perf: Fix warning caused by etm_setup_aux failure
  coresight: cti: add function to register cti associate ops
  coresight: cti: Fix bug clearing sysfs links on callback
  coresight: cti: don't disable ect device if it's not enabled
  coresight: cti: increase reference count when enabling cti
  coresight: cti: allow cti to be built as a module
  coresight: catu: allow catu drivers to be built as modules
  coresight: allow the coresight core driver to be built as a module

 drivers/hwtracing/coresight/Kconfig           |  54 +++++--
 drivers/hwtracing/coresight/Makefile          |  22 +--
 drivers/hwtracing/coresight/coresight-catu.c  |  37 ++++-
 drivers/hwtracing/coresight/coresight-catu.h  |   2 -
 .../{coresight.c => coresight-core.c}         | 134 +++++++++++++++---
 .../hwtracing/coresight/coresight-cpu-debug.c |   2 +
 .../{coresight-cti.c => coresight-cti-core.c} |  62 ++++++--
 drivers/hwtracing/coresight/coresight-etb10.c |  22 ++-
 .../hwtracing/coresight/coresight-etm-perf.c  |  13 +-
 .../hwtracing/coresight/coresight-etm-perf.h  |   5 +-
 ...resight-etm3x.c => coresight-etm3x-core.c} |  27 +++-
 ...resight-etm4x.c => coresight-etm4x-core.c} |  26 +++-
 .../hwtracing/coresight/coresight-funnel.c    |  62 +++++++-
 .../hwtracing/coresight/coresight-platform.c  |   1 +
 drivers/hwtracing/coresight/coresight-priv.h  |  24 ++--
 .../coresight/coresight-replicator.c          |  63 +++++++-
 drivers/hwtracing/coresight/coresight-stm.c   |  20 ++-
 drivers/hwtracing/coresight/coresight-sysfs.c |   2 +
 .../{coresight-tmc.c => coresight-tmc-core.c} |  19 ++-
 .../hwtracing/coresight/coresight-tmc-etf.c   |   2 +-
 .../hwtracing/coresight/coresight-tmc-etr.c   |  21 ++-
 drivers/hwtracing/coresight/coresight-tmc.h   |   3 +
 drivers/hwtracing/coresight/coresight-tpiu.c  |  19 ++-
 include/linux/coresight.h                     |   3 +-
 24 files changed, 559 insertions(+), 86 deletions(-)
 rename drivers/hwtracing/coresight/{coresight.c => coresight-core.c} (93%)
 rename drivers/hwtracing/coresight/{coresight-cti.c => coresight-cti-core.c} (94%)
 rename drivers/hwtracing/coresight/{coresight-etm3x.c => coresight-etm3x-core.c} (97%)
 rename drivers/hwtracing/coresight/{coresight-etm4x.c => coresight-etm4x-core.c} (98%)
 rename drivers/hwtracing/coresight/{coresight-tmc.c => coresight-tmc-core.c} (96%)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 01/25] coresight: cpu_debug: add module name in Kconfig

[Tingwei Zhang]

Provide name of cpu_debug module in Kconfig help section.

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 02dbb5ca3bcf..4663fd1bbffc 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -110,6 +110,9 @@ config CORESIGHT_CPU_DEBUG
 	  properly, please refer Documentation/trace/coresight/coresight-cpu-debug.rst
 	  for detailed description and the example for usage.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-cpu-debug.
+
 config CORESIGHT_CTI
 	bool "CoreSight Cross Trigger Interface (CTI) driver"
 	depends on ARM || ARM64
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 02/25] coresight: cpu_debug: define MODULE_DEVICE_TABLE

[Tingwei Zhang]

Define a MODULE_DEVICE_TABLE for cpu_debug so module can
be auto loaded on boot.

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 drivers/hwtracing/coresight/coresight-cpu-debug.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
index 96544b348c27..1d0880b3764a 100644
--- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
+++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
@@ -665,6 +665,8 @@ static const struct amba_id debug_ids[] = {
 	{},
 };
 
+MODULE_DEVICE_TABLE(amba, debug_ids);
+
 static struct amba_driver debug_driver = {
 	.drv = {
 		.name   = "coresight-cpu-debug",
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 03/25] coresight: use IS_ENABLED for CONFIGs that may be modules

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Checking for ifdef CONFIG_x fails if CONFIG_x=m.  Use IS_ENABLED
that is true for both built-ins and modules, instead.  Required
when building coresight components as modules.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 drivers/hwtracing/coresight/coresight-etm-perf.h | 2 +-
 drivers/hwtracing/coresight/coresight-priv.h     | 2 +-
 include/linux/coresight.h                        | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h
index 015213abe00a..05f89723e282 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.h
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.h
@@ -57,7 +57,7 @@ struct etm_event_data {
 	struct list_head * __percpu *path;
 };
 
-#ifdef CONFIG_CORESIGHT
+#if IS_ENABLED(CONFIG_CORESIGHT)
 int etm_perf_symlink(struct coresight_device *csdev, bool link);
 int etm_perf_add_symlink_sink(struct coresight_device *csdev);
 void etm_perf_del_symlink_sink(struct coresight_device *csdev);
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index f2dc625ea585..d801a2755432 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -165,7 +165,7 @@ int coresight_make_links(struct coresight_device *orig,
 void coresight_remove_links(struct coresight_device *orig,
 			    struct coresight_connection *conn);
 
-#ifdef CONFIG_CORESIGHT_SOURCE_ETM3X
+#if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X)
 extern int etm_readl_cp14(u32 off, unsigned int *val);
 extern int etm_writel_cp14(u32 off, u32 val);
 #else
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 58fffdecdbfd..3bb738f9a326 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -324,7 +324,7 @@ struct coresight_ops {
 	const struct coresight_ops_ect *ect_ops;
 };
 
-#ifdef CONFIG_CORESIGHT
+#if IS_ENABLED(CONFIG_CORESIGHT)
 extern struct coresight_device *
 coresight_register(struct coresight_desc *desc);
 extern void coresight_unregister(struct coresight_device *csdev);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 04/25] coresight: add coresight prefix to barrier_pkt

[Tingwei Zhang]

Add coresight prefix to make it specific. It will be a export symbol.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 drivers/hwtracing/coresight/coresight-etb10.c   | 2 +-
 drivers/hwtracing/coresight/coresight-priv.h    | 8 ++++----
 drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 +-
 drivers/hwtracing/coresight/coresight.c         | 3 ++-
 4 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 03e3f2590191..04ee9cda988d 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -525,7 +525,7 @@ static unsigned long etb_update_buffer(struct coresight_device *csdev,
 
 	cur = buf->cur;
 	offset = buf->offset;
-	barrier = barrier_pkt;
+	barrier = coresight_barrier_pkt;
 
 	for (i = 0; i < to_read; i += 4) {
 		buf_ptr = buf->data_pages[cur] + offset;
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index d801a2755432..dcb8aeb6af62 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -66,8 +66,8 @@ static DEVICE_ATTR_RO(name)
 #define coresight_simple_reg64(type, name, lo_off, hi_off)		\
 	__coresight_simple_func(type, NULL, name, lo_off, hi_off)
 
-extern const u32 barrier_pkt[4];
-#define CORESIGHT_BARRIER_PKT_SIZE (sizeof(barrier_pkt))
+extern const u32 coresight_barrier_pkt[4];
+#define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt))
 
 enum etm_addr_type {
 	ETM_ADDR_TYPE_NONE,
@@ -104,10 +104,10 @@ struct cs_buffers {
 static inline void coresight_insert_barrier_packet(void *buf)
 {
 	if (buf)
-		memcpy(buf, barrier_pkt, CORESIGHT_BARRIER_PKT_SIZE);
+		memcpy(buf, coresight_barrier_pkt,
+				CORESIGHT_BARRIER_PKT_SIZE);
 }
 
-
 static inline void CS_LOCK(void __iomem *addr)
 {
 	do {
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index 6375504ba8b0..44402d413ebb 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -519,7 +519,7 @@ static unsigned long tmc_update_etf_buffer(struct coresight_device *csdev,
 
 	cur = buf->cur;
 	offset = buf->offset;
-	barrier = barrier_pkt;
+	barrier = coresight_barrier_pkt;
 
 	/* for every byte to read */
 	for (i = 0; i < to_read; i += 4) {
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index e9c90f2de34a..310b1b825dd1 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -53,7 +53,8 @@ static struct list_head *stm_path;
  * beginning of the data collected in a buffer.  That way the decoder knows that
  * it needs to look for another sync sequence.
  */
-const u32 barrier_pkt[4] = {0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
+const u32 coresight_barrier_pkt[4] = {
+		0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
 
 static int coresight_id_match(struct device *dev, void *data)
 {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 05/25] coresight: export global symbols

[Tingwei Zhang]

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

Export symbols used among coresight modules.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight-etm-perf.c | 1 +
 drivers/hwtracing/coresight/coresight-sysfs.c    | 2 ++
 drivers/hwtracing/coresight/coresight-tmc-etr.c  | 6 ++++++
 drivers/hwtracing/coresight/coresight.c          | 8 ++++++++
 4 files changed, 17 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 1a3169e69bb1..dcb0592418ae 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -517,6 +517,7 @@ int etm_perf_symlink(struct coresight_device *csdev, bool link)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(etm_perf_symlink);
 
 static ssize_t etm_perf_sink_name_show(struct device *dev,
 				       struct device_attribute *dattr,
diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
index 82afeaf2ccc4..34d2a2d31d00 100644
--- a/drivers/hwtracing/coresight/coresight-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-sysfs.c
@@ -102,6 +102,7 @@ int coresight_add_sysfs_link(struct coresight_sysfs_link *info)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(coresight_add_sysfs_link);
 
 void coresight_remove_sysfs_link(struct coresight_sysfs_link *info)
 {
@@ -122,6 +123,7 @@ void coresight_remove_sysfs_link(struct coresight_sysfs_link *info)
 	info->orig->nr_links--;
 	info->target->nr_links--;
 }
+EXPORT_SYMBOL_GPL(coresight_remove_sysfs_link);
 
 /*
  * coresight_make_links: Make a link for a connection from a @orig
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index b29c2db94d96..ad991a37e2d2 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -255,6 +255,7 @@ void tmc_free_sg_table(struct tmc_sg_table *sg_table)
 	tmc_free_table_pages(sg_table);
 	tmc_free_data_pages(sg_table);
 }
+EXPORT_SYMBOL_GPL(tmc_free_sg_table);
 
 /*
  * Alloc pages for the table. Since this will be used by the device,
@@ -340,6 +341,7 @@ struct tmc_sg_table *tmc_alloc_sg_table(struct device *dev,
 
 	return sg_table;
 }
+EXPORT_SYMBOL_GPL(tmc_alloc_sg_table);
 
 /*
  * tmc_sg_table_sync_data_range: Sync the data buffer written
@@ -360,6 +362,7 @@ void tmc_sg_table_sync_data_range(struct tmc_sg_table *table,
 					PAGE_SIZE, DMA_FROM_DEVICE);
 	}
 }
+EXPORT_SYMBOL_GPL(tmc_sg_table_sync_data_range);
 
 /* tmc_sg_sync_table: Sync the page table */
 void tmc_sg_table_sync_table(struct tmc_sg_table *sg_table)
@@ -372,6 +375,7 @@ void tmc_sg_table_sync_table(struct tmc_sg_table *sg_table)
 		dma_sync_single_for_device(real_dev, table_pages->daddrs[i],
 					   PAGE_SIZE, DMA_TO_DEVICE);
 }
+EXPORT_SYMBOL_GPL(tmc_sg_table_sync_table);
 
 /*
  * tmc_sg_table_get_data: Get the buffer pointer for data @offset
@@ -401,6 +405,7 @@ ssize_t tmc_sg_table_get_data(struct tmc_sg_table *sg_table,
 		*bufpp = page_address(data_pages->pages[pg_idx]) + pg_offset;
 	return len;
 }
+EXPORT_SYMBOL_GPL(tmc_sg_table_get_data);
 
 #ifdef ETR_SG_DEBUG
 /* Map a dma address to virtual address */
@@ -766,6 +771,7 @@ tmc_etr_get_catu_device(struct tmc_drvdata *drvdata)
 
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(tmc_etr_get_catu_device);
 
 static inline int tmc_etr_enable_catu(struct tmc_drvdata *drvdata,
 				      struct etr_buf *etr_buf)
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 310b1b825dd1..b7151c5f81b1 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -55,6 +55,7 @@ static struct list_head *stm_path;
  */
 const u32 coresight_barrier_pkt[4] = {
 		0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
+EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
 
 static int coresight_id_match(struct device *dev, void *data)
 {
@@ -180,6 +181,7 @@ int coresight_claim_device_unlocked(void __iomem *base)
 	coresight_clear_claim_tags(base);
 	return -EBUSY;
 }
+EXPORT_SYMBOL_GPL(coresight_claim_device_unlocked);
 
 int coresight_claim_device(void __iomem *base)
 {
@@ -191,6 +193,7 @@ int coresight_claim_device(void __iomem *base)
 
 	return rc;
 }
+EXPORT_SYMBOL_GPL(coresight_claim_device);
 
 /*
  * coresight_disclaim_device_unlocked : Clear the claim tags for the device.
@@ -209,6 +212,7 @@ void coresight_disclaim_device_unlocked(void __iomem *base)
 		 */
 		WARN_ON_ONCE(1);
 }
+EXPORT_SYMBOL_GPL(coresight_disclaim_device_unlocked);
 
 void coresight_disclaim_device(void __iomem *base)
 {
@@ -216,6 +220,7 @@ void coresight_disclaim_device(void __iomem *base)
 	coresight_disclaim_device_unlocked(base);
 	CS_LOCK(base);
 }
+EXPORT_SYMBOL_GPL(coresight_disclaim_device);
 
 /* enable or disable an associated CTI device of the supplied CS device */
 static int
@@ -468,6 +473,7 @@ void coresight_disable_path(struct list_head *path)
 {
 	coresight_disable_path_from(path, NULL);
 }
+EXPORT_SYMBOL_GPL(coresight_disable_path);
 
 int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data)
 {
@@ -1377,6 +1383,7 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value)
 
 	return -EAGAIN;
 }
+EXPORT_SYMBOL_GPL(coresight_timeout);
 
 struct bus_type coresight_bustype = {
 	.name	= "coresight",
@@ -1553,6 +1560,7 @@ bool coresight_loses_context_with_cpu(struct device *dev)
 	return fwnode_property_present(dev_fwnode(dev),
 				       "arm,coresight-loses-context-with-cpu");
 }
+EXPORT_SYMBOL_GPL(coresight_loses_context_with_cpu);
 
 /*
  * coresight_alloc_device_name - Get an index for a given device in the
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 06/25] coresight: add try_get_module() in coresight_grab_device()

[Tingwei Zhang]

When coresight device is in an active session, driver module of
that device should not be removed. Use try_get_module() in
coresight_grab_device() to prevent module to be unloaded.
Use get_device()/put_device() to protect device data
in the middle of active session.

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight.c | 39 +++++++++++++++++++++----
 1 file changed, 34 insertions(+), 5 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index b7151c5f81b1..1626bc885dfe 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -640,7 +640,7 @@ struct coresight_device *coresight_get_sink_by_id(u32 id)
  * don't appear on the trace path, they should be handled along with the
  * the master device.
  */
-static void coresight_grab_device(struct coresight_device *csdev)
+static int coresight_grab_device(struct coresight_device *csdev)
 {
 	int i;
 
@@ -648,10 +648,30 @@ static void coresight_grab_device(struct coresight_device *csdev)
 		struct coresight_device *child;
 
 		child  = csdev->pdata->conns[i].child_dev;
-		if (child && child->type == CORESIGHT_DEV_TYPE_HELPER)
+		if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
+			if (!try_module_get(child->dev.parent->driver->owner))
+				goto err;
+			get_device(child->dev.parent);
 			pm_runtime_get_sync(child->dev.parent);
+		}
 	}
+	if (!try_module_get(csdev->dev.parent->driver->owner))
+		goto err;
+	get_device(csdev->dev.parent);
 	pm_runtime_get_sync(csdev->dev.parent);
+	return 0;
+err:
+	for (i--; i >= 0; i--) {
+		struct coresight_device *child;
+
+		child  = csdev->pdata->conns[i].child_dev;
+		if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
+			pm_runtime_put(child->dev.parent);
+			put_device(child->dev.parent);
+			module_put(child->dev.parent->driver->owner);
+		}
+	}
+	return -ENODEV;
 }
 
 /*
@@ -663,12 +683,17 @@ static void coresight_drop_device(struct coresight_device *csdev)
 	int i;
 
 	pm_runtime_put(csdev->dev.parent);
+	put_device(csdev->dev.parent);
+	module_put(csdev->dev.parent->driver->owner);
 	for (i = 0; i < csdev->pdata->nr_outport; i++) {
 		struct coresight_device *child;
 
 		child  = csdev->pdata->conns[i].child_dev;
-		if (child && child->type == CORESIGHT_DEV_TYPE_HELPER)
+		if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
 			pm_runtime_put(child->dev.parent);
+			put_device(child->dev.parent);
+			module_put(child->dev.parent->driver->owner);
+		}
 	}
 }
 
@@ -687,7 +712,7 @@ static int _coresight_build_path(struct coresight_device *csdev,
 				 struct coresight_device *sink,
 				 struct list_head *path)
 {
-	int i;
+	int i, ret;
 	bool found = false;
 	struct coresight_node *node;
 
@@ -721,7 +746,11 @@ static int _coresight_build_path(struct coresight_device *csdev,
 	if (!node)
 		return -ENOMEM;
 
-	coresight_grab_device(csdev);
+	ret = coresight_grab_device(csdev);
+	if (ret) {
+		kfree(node);
+		return ret;
+	}
 	node->csdev = csdev;
 	list_add(&node->link, path);
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 07/25] coresight: stm: allow to build coresight-stm as a module

[Tingwei Zhang]

- Kconfig becomes a tristate, to allow =m
- add a stm_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig         |  5 ++++-
 drivers/hwtracing/coresight/coresight-stm.c | 20 +++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 4663fd1bbffc..6433f835fc97 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -86,7 +86,7 @@ config CORESIGHT_SOURCE_ETM4X
 	  data tracing may also be available.
 
 config CORESIGHT_STM
-	bool "CoreSight System Trace Macrocell driver"
+	tristate "CoreSight System Trace Macrocell driver"
 	depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
 	select CORESIGHT_LINKS_AND_SINKS
 	select STM
@@ -96,6 +96,9 @@ config CORESIGHT_STM
 	  logging useful software events or data coming from various entities
 	  in the system, possibly running different OSs
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-stm.
+
 config CORESIGHT_CPU_DEBUG
 	tristate "CoreSight CPU Debug driver"
 	depends on ARM || ARM64
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 673d2f56ed1e..b74072e78436 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -948,6 +948,17 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
+static int __exit stm_remove(struct amba_device *adev)
+{
+	struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	coresight_unregister(drvdata->csdev);
+
+	stm_unregister_device(&drvdata->stm);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int stm_runtime_suspend(struct device *dev)
 {
@@ -980,6 +991,8 @@ static const struct amba_id stm_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, stm_ids);
+
 static struct amba_driver stm_driver = {
 	.drv = {
 		.name   = "coresight-stm",
@@ -988,7 +1001,12 @@ static struct amba_driver stm_driver = {
 		.suppress_bind_attrs = true,
 	},
 	.probe          = stm_probe,
+	.remove         = stm_remove,
 	.id_table	= stm_ids,
 };
 
-builtin_amba_driver(stm_driver);
+module_amba_driver(stm_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_DESCRIPTION("Arm CoreSight System Trace Macrocell driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 08/25] coresight: etm: perf: Fix warning caused by etm_setup_aux failure

[Tingwei Zhang]

When coresight_build_path() fails on all the cpus, etm_setup_aux
calls etm_free_aux() to free allocated event_data.
WARN_ON(cpumask_empty(mask) will be triggered since cpu mask is empty.
Check event_data->snk_config is not NULL first to avoid this
warning.

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight-etm-perf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index dcb0592418ae..3728c44e5763 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -126,10 +126,10 @@ static void free_sink_buffer(struct etm_event_data *event_data)
 	cpumask_t *mask = &event_data->mask;
 	struct coresight_device *sink;
 
-	if (WARN_ON(cpumask_empty(mask)))
+	if (!event_data->snk_config)
 		return;
 
-	if (!event_data->snk_config)
+	if (WARN_ON(cpumask_empty(mask)))
 		return;
 
 	cpu = cpumask_first(mask);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 09/25] coresight: etm3x: allow etm3x to be built as a module

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-etm3x as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- append -core to source file name to allow module to
  be called coresight-etm3x by the Makefile
- add an etm_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 +++-
 drivers/hwtracing/coresight/Makefile          |  3 ++-
 ...resight-etm3x.c => coresight-etm3x-core.c} | 27 ++++++++++++++++++-
 3 files changed, 32 insertions(+), 3 deletions(-)
 rename drivers/hwtracing/coresight/{coresight-etm3x.c => coresight-etm3x-core.c} (97%)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 6433f835fc97..8fd9fd139cf3 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -65,7 +65,7 @@ config CORESIGHT_SINK_ETBV10
 	  special enhancement or added features.
 
 config CORESIGHT_SOURCE_ETM3X
-	bool "CoreSight Embedded Trace Macrocell 3.x driver"
+	tristate "CoreSight Embedded Trace Macrocell 3.x driver"
 	depends on !ARM64
 	select CORESIGHT_LINKS_AND_SINKS
 	help
@@ -74,6 +74,9 @@ config CORESIGHT_SOURCE_ETM3X
 	  This is primarily useful for instruction level tracing.  Depending
 	  the ETM version data tracing may also be available.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-etm3x.
+
 config CORESIGHT_SOURCE_ETM4X
 	bool "CoreSight Embedded Trace Macrocell 4.x driver"
 	depends on ARM64
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index 19497d1d92bf..d619cfd0abd8 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -11,7 +11,8 @@ obj-$(CONFIG_CORESIGHT_SINK_TPIU) += coresight-tpiu.o
 obj-$(CONFIG_CORESIGHT_SINK_ETBV10) += coresight-etb10.o
 obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
 					   coresight-replicator.o
-obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \
+obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o
+coresight-etm3x-y := coresight-etm3x-core.o coresight-etm-cp14.o \
 					coresight-etm3x-sysfs.o
 obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
 					coresight-etm4x-sysfs.o
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
similarity index 97%
rename from drivers/hwtracing/coresight/coresight-etm3x.c
rename to drivers/hwtracing/coresight/coresight-etm3x-core.c
index bf22dcfd3327..82b333c40006 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -895,6 +895,23 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
+static int __exit etm_remove(struct amba_device *adev)
+{
+	struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	etm_perf_symlink(drvdata->csdev, false);
+
+	if (--etm_count == 0) {
+		cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING);
+		if (hp_online)
+			cpuhp_remove_state_nocalls(hp_online);
+	}
+
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int etm_runtime_suspend(struct device *dev)
 {
@@ -937,6 +954,8 @@ static const struct amba_id etm_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, etm_ids);
+
 static struct amba_driver etm_driver = {
 	.drv = {
 		.name	= "coresight-etm3x",
@@ -945,6 +964,12 @@ static struct amba_driver etm_driver = {
 		.suppress_bind_attrs = true,
 	},
 	.probe		= etm_probe,
+	.remove         = etm_remove,
 	.id_table	= etm_ids,
 };
-builtin_amba_driver(etm_driver);
+module_amba_driver(etm_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 10/25] coresight: etm4x: allow etm4x to be built as a module

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-etm4x as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- append -core to source file name to allow module to
  be called coresight-etm4x by the Makefile
- add an etm4_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 +++-
 drivers/hwtracing/coresight/Makefile          |  4 +--
 ...resight-etm4x.c => coresight-etm4x-core.c} | 26 ++++++++++++++++++-
 3 files changed, 31 insertions(+), 4 deletions(-)
 rename drivers/hwtracing/coresight/{coresight-etm4x.c => coresight-etm4x-core.c} (98%)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 8fd9fd139cf3..d6e107bbd30b 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -78,7 +78,7 @@ config CORESIGHT_SOURCE_ETM3X
 	  module will be called coresight-etm3x.
 
 config CORESIGHT_SOURCE_ETM4X
-	bool "CoreSight Embedded Trace Macrocell 4.x driver"
+	tristate "CoreSight Embedded Trace Macrocell 4.x driver"
 	depends on ARM64
 	select CORESIGHT_LINKS_AND_SINKS
 	select PID_IN_CONTEXTIDR
@@ -88,6 +88,9 @@ config CORESIGHT_SOURCE_ETM4X
 	  for instruction level tracing. Depending on the implemented version
 	  data tracing may also be available.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-etm4x.
+
 config CORESIGHT_STM
 	tristate "CoreSight System Trace Macrocell driver"
 	depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index d619cfd0abd8..271dc255454f 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -14,8 +14,8 @@ obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
 obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o
 coresight-etm3x-y := coresight-etm3x-core.o coresight-etm-cp14.o \
 					coresight-etm3x-sysfs.o
-obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
-					coresight-etm4x-sysfs.o
+obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o
+coresight-etm4x-y := coresight-etm4x-core.o coresight-etm4x-sysfs.o
 obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
 obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
 obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
similarity index 98%
rename from drivers/hwtracing/coresight/coresight-etm4x.c
rename to drivers/hwtracing/coresight/coresight-etm4x-core.c
index 6d7d2169bfb2..8149853d5e9d 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1573,6 +1573,21 @@ static struct amba_cs_uci_id uci_id_etm4[] = {
 	}
 };
 
+static int __exit etm4_remove(struct amba_device *adev)
+{
+	struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	etm_perf_symlink(drvdata->csdev, false);
+
+	etmdrvdata[drvdata->cpu] = NULL;
+	etm4_pm_clear();
+
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
+
 static const struct amba_id etm4_ids[] = {
 	CS_AMBA_ID(0x000bb95d),			/* Cortex-A53 */
 	CS_AMBA_ID(0x000bb95e),			/* Cortex-A57 */
@@ -1590,12 +1605,21 @@ static const struct amba_id etm4_ids[] = {
 	{},
 };
 
+MODULE_DEVICE_TABLE(amba, etm4_ids);
+
 static struct amba_driver etm4x_driver = {
 	.drv = {
 		.name   = "coresight-etm4x",
+		.owner  = THIS_MODULE,
 		.suppress_bind_attrs = true,
 	},
 	.probe		= etm4_probe,
+	.remove         = etm4_remove,
 	.id_table	= etm4_ids,
 };
-builtin_amba_driver(etm4x_driver);
+module_amba_driver(etm4x_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace v4 driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 11/25] coresight: etb: allow etb to be built as a module

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-etb10 as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- add an etb_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 ++++-
 drivers/hwtracing/coresight/coresight-etb10.c | 20 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index d6e107bbd30b..996d84a1edb8 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -57,13 +57,16 @@ config CORESIGHT_SINK_TPIU
 	  the on-board coresight memory can handle.
 
 config CORESIGHT_SINK_ETBV10
-	bool "Coresight ETBv1.0 driver"
+	tristate "Coresight ETBv1.0 driver"
 	depends on CORESIGHT_LINKS_AND_SINKS
 	help
 	  This enables support for the Embedded Trace Buffer version 1.0 driver
 	  that complies with the generic implementation of the component without
 	  special enhancement or added features.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-etb10.
+
 config CORESIGHT_SOURCE_ETM3X
 	tristate "CoreSight Embedded Trace Macrocell 3.x driver"
 	depends on !ARM64
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 04ee9cda988d..b40756497c9a 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -801,6 +801,16 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
+static int __exit etb_remove(struct amba_device *adev)
+{
+	struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	misc_deregister(&drvdata->miscdev);
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int etb_runtime_suspend(struct device *dev)
 {
@@ -835,6 +845,8 @@ static const struct amba_id etb_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, etb_ids);
+
 static struct amba_driver etb_driver = {
 	.drv = {
 		.name	= "coresight-etb10",
@@ -844,6 +856,12 @@ static struct amba_driver etb_driver = {
 
 	},
 	.probe		= etb_probe,
+	.remove		= etb_remove,
 	.id_table	= etb_ids,
 };
-builtin_amba_driver(etb_driver);
+module_amba_driver(etb_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Embedded Trace Buffer driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 12/25] coresight: tpiu: allow tpiu to be built as a module

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-tpiu as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- add a tpiu_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig          |  5 ++++-
 drivers/hwtracing/coresight/coresight-tpiu.c | 19 ++++++++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 996d84a1edb8..8fd9887fb03b 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -46,7 +46,7 @@ config CORESIGHT_CATU
 	   mode where the address is not translated.
 
 config CORESIGHT_SINK_TPIU
-	bool "Coresight generic TPIU driver"
+	tristate "Coresight generic TPIU driver"
 	depends on CORESIGHT_LINKS_AND_SINKS
 	help
 	  This enables support for the Trace Port Interface Unit driver,
@@ -56,6 +56,9 @@ config CORESIGHT_SINK_TPIU
 	  connected to an external host for use case capturing more traces than
 	  the on-board coresight memory can handle.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-tpiu.
+
 config CORESIGHT_SINK_ETBV10
 	tristate "Coresight ETBv1.0 driver"
 	depends on CORESIGHT_LINKS_AND_SINKS
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index f8583e4032a6..e4ddd9801535 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -173,6 +173,15 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
 	return PTR_ERR(drvdata->csdev);
 }
 
+static int __exit tpiu_remove(struct amba_device *adev)
+{
+	struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int tpiu_runtime_suspend(struct device *dev)
 {
@@ -216,6 +225,8 @@ static const struct amba_id tpiu_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, tpiu_ids);
+
 static struct amba_driver tpiu_driver = {
 	.drv = {
 		.name	= "coresight-tpiu",
@@ -224,6 +235,12 @@ static struct amba_driver tpiu_driver = {
 		.suppress_bind_attrs = true,
 	},
 	.probe		= tpiu_probe,
+	.remove         = tpiu_remove,
 	.id_table	= tpiu_ids,
 };
-builtin_amba_driver(tpiu_driver);
+module_amba_driver(tpiu_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight TPIU (Trace Port Interface Unit) driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 13/25] coresight: tmc: allow tmc to be built as a module

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-tmc as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- append -core to source file name to allow module to
  be called coresight-tmc by the Makefile
- add an tmc_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  6 +++++-
 drivers/hwtracing/coresight/Makefile          |  6 +++---
 .../{coresight-tmc.c => coresight-tmc-core.c} | 19 ++++++++++++++++++-
 3 files changed, 26 insertions(+), 5 deletions(-)
 rename drivers/hwtracing/coresight/{coresight-tmc.c => coresight-tmc-core.c} (96%)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 8fd9887fb03b..fc48ae086746 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -25,7 +25,8 @@ config CORESIGHT_LINKS_AND_SINKS
 	  entity at run time to form a complete trace path.
 
 config CORESIGHT_LINK_AND_SINK_TMC
-	bool "Coresight generic TMC driver"
+	tristate "Coresight generic TMC driver"
+
 	depends on CORESIGHT_LINKS_AND_SINKS
 	help
 	  This enables support for the Trace Memory Controller driver.
@@ -34,6 +35,9 @@ config CORESIGHT_LINK_AND_SINK_TMC
 	  complies with the generic implementation of the component without
 	  special enhancement or added features.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-tmc.
+
 config CORESIGHT_CATU
 	bool "Coresight Address Translation Unit (CATU) driver"
 	depends on CORESIGHT_LINK_AND_SINK_TMC
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index 271dc255454f..f2a568b969c4 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -4,9 +4,9 @@
 #
 obj-$(CONFIG_CORESIGHT) += coresight.o coresight-etm-perf.o \
 			   coresight-platform.o coresight-sysfs.o
-obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o \
-					     coresight-tmc-etf.o \
-					     coresight-tmc-etr.o
+obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o
+coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \
+		      coresight-tmc-etr.o
 obj-$(CONFIG_CORESIGHT_SINK_TPIU) += coresight-tpiu.o
 obj-$(CONFIG_CORESIGHT_SINK_ETBV10) += coresight-etb10.o
 obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
similarity index 96%
rename from drivers/hwtracing/coresight/coresight-tmc.c
rename to drivers/hwtracing/coresight/coresight-tmc-core.c
index 7040d583bed9..29d191ba7ccf 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -561,6 +561,16 @@ static void tmc_shutdown(struct amba_device *adev)
 	spin_unlock_irqrestore(&drvdata->spinlock, flags);
 }
 
+static int __exit tmc_remove(struct amba_device *adev)
+{
+	struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	misc_deregister(&drvdata->miscdev);
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
 static const struct amba_id tmc_ids[] = {
 	CS_AMBA_ID(0x000bb961),
 	/* Coresight SoC 600 TMC-ETR/ETS */
@@ -572,6 +582,8 @@ static const struct amba_id tmc_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, tmc_ids);
+
 static struct amba_driver tmc_driver = {
 	.drv = {
 		.name   = "coresight-tmc",
@@ -580,6 +592,11 @@ static struct amba_driver tmc_driver = {
 	},
 	.probe		= tmc_probe,
 	.shutdown	= tmc_shutdown,
+	.remove		= tmc_remove,
 	.id_table	= tmc_ids,
 };
-builtin_amba_driver(tmc_driver);
+module_amba_driver(tmc_driver);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_DESCRIPTION("Arm CoreSight Trace Memory Controller driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 14/25] coresight: funnel: remove multiple init calls from funnel driver

[Tingwei Zhang]

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

Dynamic-funnel uses module_amba_driver to register. Whereas
static-funnel uses builtin_platform_driver. Combine these init calls
into a single module_init/exit pair in preparation to make the driver
modular.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 .../hwtracing/coresight/coresight-funnel.c    | 30 +++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 900690a9f7f0..46b277ed8606 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -341,7 +341,6 @@ static struct platform_driver static_funnel_driver = {
 		.suppress_bind_attrs = true,
 	},
 };
-builtin_platform_driver(static_funnel_driver);
 
 static int dynamic_funnel_probe(struct amba_device *adev,
 				const struct amba_id *id)
@@ -372,4 +371,31 @@ static struct amba_driver dynamic_funnel_driver = {
 	.probe		= dynamic_funnel_probe,
 	.id_table	= dynamic_funnel_ids,
 };
-builtin_amba_driver(dynamic_funnel_driver);
+
+static int __init funnel_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&static_funnel_driver);
+	if (ret) {
+		pr_info("Error registering platform driver\n");
+		return ret;
+	}
+
+	ret = amba_driver_register(&dynamic_funnel_driver);
+	if (ret) {
+		pr_info("Error registering amba driver\n");
+		platform_driver_unregister(&static_funnel_driver);
+	}
+
+	return ret;
+}
+
+static void __exit funnel_exit(void)
+{
+	platform_driver_unregister(&static_funnel_driver);
+	amba_driver_unregister(&dynamic_funnel_driver);
+}
+
+module_init(funnel_init);
+module_exit(funnel_exit);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 15/25] coresight: replicator: remove multiple init calls

[Tingwei Zhang]

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

Dynamic-replicator uses module_amba_driver to register. Whereas
static-replicator uses builtin_platform_driver. Combine these init
calls into a single module_init/exit pair in preparation to make the
driver modular.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 .../coresight/coresight-replicator.c          | 30 +++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 78acf29c49ca..6b30bcee7458 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -360,7 +360,6 @@ static struct platform_driver static_replicator_driver = {
 		.suppress_bind_attrs = true,
 	},
 };
-builtin_platform_driver(static_replicator_driver);
 
 static int dynamic_replicator_probe(struct amba_device *adev,
 				    const struct amba_id *id)
@@ -383,4 +382,31 @@ static struct amba_driver dynamic_replicator_driver = {
 	.probe		= dynamic_replicator_probe,
 	.id_table	= dynamic_replicator_ids,
 };
-builtin_amba_driver(dynamic_replicator_driver);
+
+static int __init replicator_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&static_replicator_driver);
+	if (ret) {
+		pr_info("Error registering platform driver\n");
+		return ret;
+	}
+
+	ret = amba_driver_register(&dynamic_replicator_driver);
+	if (ret) {
+		pr_info("Error registering amba driver\n");
+		platform_driver_unregister(&static_replicator_driver);
+	}
+
+	return ret;
+}
+
+static void __exit replicator_exit(void)
+{
+	platform_driver_unregister(&static_replicator_driver);
+	amba_driver_unregister(&dynamic_replicator_driver);
+}
+
+module_init(replicator_init);
+module_exit(replicator_exit);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 16/25] coresight: allow funnel and replicator drivers to be built as modules

[Tingwei Zhang]

From: Kim Phillips <kim.phillips@arm.com>

Allow to build coresight-funnel and coresight-replicator as modules,
for ease of development.

- Kconfig becomes a tristate, to allow =m
- add funnel_remove and replicator_remove functions,
  for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 ++-
 .../hwtracing/coresight/coresight-funnel.c    | 32 ++++++++++++++++++
 .../coresight/coresight-replicator.c          | 33 +++++++++++++++++++
 3 files changed, 69 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index fc48ae086746..f31778dd0b5d 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -17,13 +17,16 @@ menuconfig CORESIGHT
 
 if CORESIGHT
 config CORESIGHT_LINKS_AND_SINKS
-	bool "CoreSight Link and Sink drivers"
+	tristate "CoreSight Link and Sink drivers"
 	help
 	  This enables support for CoreSight link and sink drivers that are
 	  responsible for transporting and collecting the trace data
 	  respectively.  Link and sinks are dynamically aggregated with a trace
 	  entity at run time to form a complete trace path.
 
+	  To compile these drivers as modules, choose M here: the
+	  modules will be called coresight-funnel and coresight-replicator.
+
 config CORESIGHT_LINK_AND_SINK_TMC
 	tristate "Coresight generic TMC driver"
 
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 46b277ed8606..062694ef9879 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -274,6 +274,15 @@ static int funnel_probe(struct device *dev, struct resource *res)
 	return ret;
 }
 
+static int __exit funnel_remove(struct device *dev)
+{
+	struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
+
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int funnel_runtime_suspend(struct device *dev)
 {
@@ -319,20 +328,31 @@ static int static_funnel_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int __exit static_funnel_remove(struct platform_device *pdev)
+{
+	funnel_remove(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
 static const struct of_device_id static_funnel_match[] = {
 	{.compatible = "arm,coresight-static-funnel"},
 	{}
 };
 
+MODULE_DEVICE_TABLE(of, static_funnel_match);
+
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id static_funnel_ids[] = {
 	{"ARMHC9FE", 0},
 	{},
 };
+MODULE_DEVICE_TABLE(acpi, static_funnel_ids);
 #endif
 
 static struct platform_driver static_funnel_driver = {
 	.probe          = static_funnel_probe,
+	.probe          = static_funnel_remove,
 	.driver         = {
 		.name   = "coresight-static-funnel",
 		.of_match_table = static_funnel_match,
@@ -348,6 +368,11 @@ static int dynamic_funnel_probe(struct amba_device *adev,
 	return funnel_probe(&adev->dev, &adev->res);
 }
 
+static int __exit dynamic_funnel_remove(struct amba_device *adev)
+{
+	return funnel_remove(&adev->dev);
+}
+
 static const struct amba_id dynamic_funnel_ids[] = {
 	{
 		.id     = 0x000bb908,
@@ -361,6 +386,8 @@ static const struct amba_id dynamic_funnel_ids[] = {
 	{ 0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, dynamic_funnel_ids);
+
 static struct amba_driver dynamic_funnel_driver = {
 	.drv = {
 		.name	= "coresight-dynamic-funnel",
@@ -369,6 +396,7 @@ static struct amba_driver dynamic_funnel_driver = {
 		.suppress_bind_attrs = true,
 	},
 	.probe		= dynamic_funnel_probe,
+	.remove		= dynamic_funnel_remove,
 	.id_table	= dynamic_funnel_ids,
 };
 
@@ -399,3 +427,7 @@ static void __exit funnel_exit(void)
 
 module_init(funnel_init);
 module_exit(funnel_exit);
+
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Funnel Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 6b30bcee7458..05db434c79d0 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -291,6 +291,14 @@ static int replicator_probe(struct device *dev, struct resource *res)
 	return ret;
 }
 
+static int __exit replicator_remove(struct device *dev)
+{
+	struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
+
+	coresight_unregister(drvdata->csdev);
+	return 0;
+}
+
 static int static_replicator_probe(struct platform_device *pdev)
 {
 	int ret;
@@ -310,6 +318,13 @@ static int static_replicator_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int __exit static_replicator_remove(struct platform_device *pdev)
+{
+	replicator_remove(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int replicator_runtime_suspend(struct device *dev)
 {
@@ -342,18 +357,22 @@ static const struct of_device_id static_replicator_match[] = {
 	{.compatible = "arm,coresight-static-replicator"},
 	{}
 };
+MODULE_DEVICE_TABLE(of, static_replicator_match);
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id static_replicator_acpi_ids[] = {
 	{"ARMHC985", 0}, /* ARM CoreSight Static Replicator */
 	{}
 };
+MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids);
 #endif
 
 static struct platform_driver static_replicator_driver = {
 	.probe          = static_replicator_probe,
+	.remove         = static_replicator_remove,
 	.driver         = {
 		.name   = "coresight-static-replicator",
+		.owner	= THIS_MODULE,
 		.of_match_table = of_match_ptr(static_replicator_match),
 		.acpi_match_table = ACPI_PTR(static_replicator_acpi_ids),
 		.pm	= &replicator_dev_pm_ops,
@@ -367,19 +386,28 @@ static int dynamic_replicator_probe(struct amba_device *adev,
 	return replicator_probe(&adev->dev, &adev->res);
 }
 
+static int __exit dynamic_replicator_remove(struct amba_device *adev)
+{
+	return replicator_remove(&adev->dev);
+}
+
 static const struct amba_id dynamic_replicator_ids[] = {
 	CS_AMBA_ID(0x000bb909),
 	CS_AMBA_ID(0x000bb9ec),		/* Coresight SoC-600 */
 	{},
 };
 
+MODULE_DEVICE_TABLE(amba, dynamic_replicator_ids);
+
 static struct amba_driver dynamic_replicator_driver = {
 	.drv = {
 		.name	= "coresight-dynamic-replicator",
 		.pm	= &replicator_dev_pm_ops,
+		.owner	= THIS_MODULE,
 		.suppress_bind_attrs = true,
 	},
 	.probe		= dynamic_replicator_probe,
+	.remove         = dynamic_replicator_remove,
 	.id_table	= dynamic_replicator_ids,
 };
 
@@ -410,3 +438,8 @@ static void __exit replicator_exit(void)
 
 module_init(replicator_init);
 module_exit(replicator_exit);
+
+MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 17/25] coresight: cti: add function to register cti associate ops

[Tingwei Zhang]

Add static cti_assoc_ops to coresight core driver. Let cti
driver register the add_assoc and remove_assoc call back.
Avoid coresight core driver to depend on cti driver.

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight-cti.c  | 32 ++++++++++++++++++--
 drivers/hwtracing/coresight/coresight-priv.h | 14 ++++-----
 drivers/hwtracing/coresight/coresight.c      | 21 +++++++++++--
 3 files changed, 53 insertions(+), 14 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c
index 3ccc703dc940..1f470c47ba70 100644
--- a/drivers/hwtracing/coresight/coresight-cti.c
+++ b/drivers/hwtracing/coresight/coresight-cti.c
@@ -589,7 +589,6 @@ void cti_add_assoc_to_csdev(struct coresight_device *csdev)
 cti_add_done:
 	mutex_unlock(&ect_mutex);
 }
-EXPORT_SYMBOL_GPL(cti_add_assoc_to_csdev);
 
 /*
  * Removing the associated devices is easier.
@@ -616,7 +615,15 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev)
 	}
 	mutex_unlock(&ect_mutex);
 }
-EXPORT_SYMBOL_GPL(cti_remove_assoc_from_csdev);
+
+/*
+ * Operations to add and remove associated CTI.
+ * Register to coresight core driver as call back function.
+ */
+static struct cti_assoc_op cti_assoc_ops = {
+	.add = cti_add_assoc_to_csdev,
+	.remove = cti_remove_assoc_from_csdev
+};
 
 /*
  * Update the cross references where the associated device was found
@@ -972,4 +979,23 @@ static struct amba_driver cti_driver = {
 	.probe		= cti_probe,
 	.id_table	= cti_ids,
 };
-builtin_amba_driver(cti_driver);
+
+static int __init cti_init(void)
+{
+	int ret;
+
+	ret = amba_driver_register(&cti_driver);
+	if (ret)
+		pr_info("Error registering cti driver\n");
+	coresight_set_cti_ops(&cti_assoc_ops);
+	return ret;
+}
+
+static void __exit cti_exit(void)
+{
+	coresight_remove_cti_ops();
+	amba_driver_unregister(&cti_driver);
+}
+
+module_init(cti_init);
+module_exit(cti_exit);
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index dcb8aeb6af62..6cde6cf42554 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -173,15 +173,13 @@ static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
 static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
 #endif
 
-#ifdef CONFIG_CORESIGHT_CTI
-extern void cti_add_assoc_to_csdev(struct coresight_device *csdev);
-extern void cti_remove_assoc_from_csdev(struct coresight_device *csdev);
+struct cti_assoc_op {
+	void (*add)(struct coresight_device *csdev);
+	void (*remove)(struct coresight_device *csdev);
+};
 
-#else
-static inline void cti_add_assoc_to_csdev(struct coresight_device *csdev) {}
-static inline void
-cti_remove_assoc_from_csdev(struct coresight_device *csdev) {}
-#endif
+extern void coresight_set_cti_ops(const struct cti_assoc_op *cti_op);
+extern void coresight_remove_cti_ops(void);
 
 /*
  * Macros and inline functions to handle CoreSight UCI data and driver
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 1626bc885dfe..25578579559b 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -57,6 +57,20 @@ const u32 coresight_barrier_pkt[4] = {
 		0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
 EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
 
+static const struct cti_assoc_op *cti_assoc_ops;
+
+void coresight_set_cti_ops(const struct cti_assoc_op *cti_op)
+{
+	cti_assoc_ops = cti_op;
+}
+EXPORT_SYMBOL_GPL(coresight_set_cti_ops);
+
+void coresight_remove_cti_ops(void)
+{
+	cti_assoc_ops = NULL;
+}
+EXPORT_SYMBOL_GPL(coresight_remove_cti_ops);
+
 static int coresight_id_match(struct device *dev, void *data)
 {
 	int trace_id, i_trace_id;
@@ -1224,7 +1238,8 @@ static void coresight_device_release(struct device *dev)
 {
 	struct coresight_device *csdev = to_coresight_device(dev);
 
-	cti_remove_assoc_from_csdev(csdev);
+	if (cti_assoc_ops && cti_assoc_ops->remove)
+		cti_assoc_ops->remove(csdev);
 	fwnode_handle_put(csdev->dev.fwnode);
 	kfree(csdev->refcnt);
 	kfree(csdev);
@@ -1535,8 +1550,8 @@ struct coresight_device *coresight_register(struct coresight_desc *desc)
 		ret = coresight_fixup_device_conns(csdev);
 	if (!ret)
 		ret = coresight_fixup_orphan_conns(csdev);
-	if (!ret)
-		cti_add_assoc_to_csdev(csdev);
+	if (!ret && cti_assoc_ops && cti_assoc_ops->add)
+		cti_assoc_ops->add(csdev);
 
 	mutex_unlock(&coresight_mutex);
 	if (ret) {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 18/25] coresight: cti: Fix remove sysfs link error

[Tingwei Zhang]

From: Mike Leach <mike.leach@linaro.org>

CTI code to remove sysfs link to other devices on shutdown, incorrectly
tries to remove a single ended link when these are all double ended. This
implementation leaves elements in the link info structure undefined which
results in a crash in recent tests for driver module unload.

This patch corrects the link removal code.

Fixes: 73274abb6557 (coresight: cti: Add in sysfs links to other coresight devices)
Reported-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mike Leach <mike.leach@linaro.org>
---
 drivers/hwtracing/coresight/coresight-cti.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c
index 1f470c47ba70..1c34db7d1b1b 100644
--- a/drivers/hwtracing/coresight/coresight-cti.c
+++ b/drivers/hwtracing/coresight/coresight-cti.c
@@ -511,12 +511,15 @@ static bool cti_add_sysfs_link(struct cti_drvdata *drvdata,
 	return !link_err;
 }
 
-static void cti_remove_sysfs_link(struct cti_trig_con *tc)
+static void cti_remove_sysfs_link(struct cti_drvdata *drvdata,
+				  struct cti_trig_con *tc)
 {
 	struct coresight_sysfs_link link_info;
 
+	link_info.orig = drvdata->csdev;
 	link_info.orig_name = tc->con_dev_name;
 	link_info.target = tc->con_dev;
+	link_info.target_name = dev_name(&drvdata->csdev->dev);
 	coresight_remove_sysfs_link(&link_info);
 }
 
@@ -606,7 +609,7 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev)
 		ctidev = &ctidrv->ctidev;
 		list_for_each_entry(tc, &ctidev->trig_cons, node) {
 			if (tc->con_dev == csdev->ect_dev) {
-				cti_remove_sysfs_link(tc);
+				cti_remove_sysfs_link(ctidrv, tc);
 				tc->con_dev = NULL;
 				break;
 			}
@@ -658,7 +661,7 @@ static void cti_remove_conn_xrefs(struct cti_drvdata *drvdata)
 		if (tc->con_dev) {
 			coresight_set_assoc_ectdev_mutex(tc->con_dev,
 							 NULL);
-			cti_remove_sysfs_link(tc);
+			cti_remove_sysfs_link(drvdata, tc);
 			tc->con_dev = NULL;
 		}
 	}
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 19/25] coresight: cti: Fix bug clearing sysfs links on callback

[Tingwei Zhang]

During module unload, a coresight driver module will call back into
the CTI driver to remove any links between the two devices.

The current code has 2 issues:-
1) in the CTI driver the matching code is matching to the wrong device
so misses all the links.
2) The callback is called too late in the unload process resulting in a
crash.

This fixes both the issues.

Fixes: 177af8285b59 (coresight: cti: Enable CTI associated with devices)
Reported-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight-cti.c | 2 +-
 drivers/hwtracing/coresight/coresight.c     | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c
index 1c34db7d1b1b..6bb06c5715db 100644
--- a/drivers/hwtracing/coresight/coresight-cti.c
+++ b/drivers/hwtracing/coresight/coresight-cti.c
@@ -608,7 +608,7 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev)
 		ctidrv = csdev_to_cti_drvdata(csdev->ect_dev);
 		ctidev = &ctidrv->ctidev;
 		list_for_each_entry(tc, &ctidev->trig_cons, node) {
-			if (tc->con_dev == csdev->ect_dev) {
+			if (tc->con_dev == csdev) {
 				cti_remove_sysfs_link(ctidrv, tc);
 				tc->con_dev = NULL;
 				break;
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 25578579559b..8b55383cfcf1 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -1238,8 +1238,6 @@ static void coresight_device_release(struct device *dev)
 {
 	struct coresight_device *csdev = to_coresight_device(dev);
 
-	if (cti_assoc_ops && cti_assoc_ops->remove)
-		cti_assoc_ops->remove(csdev);
 	fwnode_handle_put(csdev->dev.fwnode);
 	kfree(csdev->refcnt);
 	kfree(csdev);
@@ -1574,6 +1572,8 @@ void coresight_unregister(struct coresight_device *csdev)
 {
 	etm_perf_del_symlink_sink(csdev);
 	/* Remove references of that device in the topology */
+	if (cti_assoc_ops && cti_assoc_ops->remove)
+		cti_assoc_ops->remove(csdev);
 	coresight_remove_conns(csdev);
 	coresight_clear_default_sink(csdev);
 	coresight_release_platform_data(csdev, csdev->pdata);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 20/25] coresight: cti: don't disable ect device if it's not enabled

[Tingwei Zhang]

If associated ect device is not enabled at first place, disable
routine should not be called. Add ect_enabled flag to check whether
ect device is enabled. Fix the issue in below case.  Ect device is
not available when associated coresight device enabled and the
association is established after coresight device is enabled.

Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight.c | 11 ++++++++---
 include/linux/coresight.h               |  1 +
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 8b55383cfcf1..83a46cf37968 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -245,13 +245,18 @@ coresight_control_assoc_ectdev(struct coresight_device *csdev, bool enable)
 
 	if (!ect_csdev)
 		return 0;
+	if ((!ect_ops(ect_csdev)->enable) || (!ect_ops(ect_csdev)->disable))
+		return 0;
 
 	if (enable) {
-		if (ect_ops(ect_csdev)->enable)
-			ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
+		ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
+		if (ect_ret)
+			csdev->ect_enabled = true;
 	} else {
-		if (ect_ops(ect_csdev)->disable)
+		if (csdev->ect_enabled) {
 			ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
+			csdev->ect_enabled = false;
+		}
 	}
 
 	/* output warning if ECT enable is preventing trace operation */
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 3bb738f9a326..7d3c87e5b97c 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -208,6 +208,7 @@ struct coresight_device {
 	/* sysfs links between components */
 	int nr_links;
 	bool has_conns_grp;
+	bool ect_enabled; /* true only if associated ect device is enabled */
 };
 
 /*
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 21/25] coresight: cti: increase reference count when enabling cti

[Tingwei Zhang]

CTI device is enabled when associated coresight device is enabled.
Increase the module and device reference count for CTI device
when it's enabled. This can prevent CTI device be removed or
module be unloaded when CTI device is enabled by an active trace
session.

Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/coresight.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 83a46cf37968..78439b7cd8ba 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -242,19 +242,30 @@ coresight_control_assoc_ectdev(struct coresight_device *csdev, bool enable)
 {
 	int ect_ret = 0;
 	struct coresight_device *ect_csdev = csdev->ect_dev;
+	struct module *mod;
 
 	if (!ect_csdev)
 		return 0;
 	if ((!ect_ops(ect_csdev)->enable) || (!ect_ops(ect_csdev)->disable))
 		return 0;
 
+	mod = ect_csdev->dev.parent->driver->owner;
 	if (enable) {
-		ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
-		if (ect_ret)
-			csdev->ect_enabled = true;
+		if (try_module_get(mod)) {
+			ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
+			if (ect_ret) {
+				module_put(mod);
+			} else {
+				get_device(ect_csdev->dev.parent);
+				csdev->ect_enabled = true;
+			}
+		} else
+			ect_ret = -ENODEV;
 	} else {
 		if (csdev->ect_enabled) {
 			ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
+			put_device(ect_csdev->dev.parent);
+			module_put(mod);
 			csdev->ect_enabled = false;
 		}
 	}
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 22/25] coresight: cti: allow cti to be built as a module

[Tingwei Zhang]

Allow to build coresight-cti as a module, for ease of development.

- Kconfig becomes a tristate, to allow =m
- append -core to source file name to allow module to
  be called coresight-cti by the Makefile
- add an cti_remove function, for module unload
- move cti_remove_conn_xrefs to cti_remove
- add a MODULE_DEVICE_TABLE for autoloading on boot

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 ++++-
 drivers/hwtracing/coresight/Makefile          |  4 ++--
 .../{coresight-cti.c => coresight-cti-core.c} | 19 ++++++++++++++++++-
 .../hwtracing/coresight/coresight-platform.c  |  1 +
 drivers/hwtracing/coresight/coresight.c       |  1 +
 5 files changed, 26 insertions(+), 4 deletions(-)
 rename drivers/hwtracing/coresight/{coresight-cti.c => coresight-cti-core.c} (98%)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index f31778dd0b5d..b04aae2ceecc 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -136,7 +136,7 @@ config CORESIGHT_CPU_DEBUG
 	  module will be called coresight-cpu-debug.
 
 config CORESIGHT_CTI
-	bool "CoreSight Cross Trigger Interface (CTI) driver"
+	tristate "CoreSight Cross Trigger Interface (CTI) driver"
 	depends on ARM || ARM64
 	help
 	  This driver provides support for CoreSight CTI and CTM components.
@@ -147,6 +147,9 @@ config CORESIGHT_CTI
 	  halt compared to disabling sources and sinks normally in driver
 	  software.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight-cti.
+
 config CORESIGHT_CTI_INTEGRATION_REGS
 	bool "Access CTI CoreSight Integration Registers"
 	depends on CORESIGHT_CTI
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index f2a568b969c4..0359d5a1588f 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -19,6 +19,6 @@ coresight-etm4x-y := coresight-etm4x-core.o coresight-etm4x-sysfs.o
 obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
 obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
 obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
-obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o \
-				coresight-cti-platform.o \
+obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o
+coresight-cti-y := coresight-cti-core.o	coresight-cti-platform.o \
 				coresight-cti-sysfs.o
diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti-core.c
similarity index 98%
rename from drivers/hwtracing/coresight/coresight-cti.c
rename to drivers/hwtracing/coresight/coresight-cti-core.c
index 6bb06c5715db..ca31da6cf1c0 100644
--- a/drivers/hwtracing/coresight/coresight-cti.c
+++ b/drivers/hwtracing/coresight/coresight-cti-core.c
@@ -838,7 +838,6 @@ static void cti_device_release(struct device *dev)
 	struct cti_drvdata *ect_item, *ect_tmp;
 
 	mutex_lock(&ect_mutex);
-	cti_remove_conn_xrefs(drvdata);
 	cti_pm_release(drvdata);
 
 	/* remove from the list */
@@ -853,6 +852,18 @@ static void cti_device_release(struct device *dev)
 	if (drvdata->csdev_release)
 		drvdata->csdev_release(dev);
 }
+static int __exit cti_remove(struct amba_device *adev)
+{
+	struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	mutex_lock(&ect_mutex);
+	cti_remove_conn_xrefs(drvdata);
+	mutex_unlock(&ect_mutex);
+
+	coresight_unregister(drvdata->csdev);
+
+	return 0;
+}
 
 static int cti_probe(struct amba_device *adev, const struct amba_id *id)
 {
@@ -972,6 +983,7 @@ static const struct amba_id cti_ids[] = {
 	CS_AMBA_UCI_ID(0x000bb9ed, uci_id_cti), /* Coresight CTI (SoC 600) */
 	{ 0, 0},
 };
+MODULE_DEVICE_TABLE(amba, cti_ids);
 
 static struct amba_driver cti_driver = {
 	.drv = {
@@ -980,6 +992,7 @@ static struct amba_driver cti_driver = {
 		.suppress_bind_attrs = true,
 	},
 	.probe		= cti_probe,
+	.remove		= cti_remove,
 	.id_table	= cti_ids,
 };
 
@@ -1002,3 +1015,7 @@ static void __exit cti_exit(void)
 
 module_init(cti_init);
 module_exit(cti_exit);
+
+MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight CTI Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index bfd44231d7ad..635d55c1d580 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -75,6 +75,7 @@ coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode)
 	}
 	return csdev;
 }
+EXPORT_SYMBOL_GPL(coresight_find_csdev_by_fwnode);
 
 #ifdef CONFIG_OF
 static inline bool of_coresight_legacy_ep_is_input(struct device_node *ep)
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 78439b7cd8ba..3b4abdda1f72 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -289,6 +289,7 @@ void coresight_set_assoc_ectdev_mutex(struct coresight_device *csdev,
 	csdev->ect_dev = ect_csdev;
 	mutex_unlock(&coresight_mutex);
 }
+EXPORT_SYMBOL_GPL(coresight_set_assoc_ectdev_mutex);
 
 static int coresight_enable_sink(struct coresight_device *csdev,
 				 u32 mode, void *data)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 23/25] coresight: tmc-etr: add function to register catu ops

[Tingwei Zhang]

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 1801804a7762..47696a7d24a7 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,
@@ -582,4 +582,22 @@ 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 ad991a37e2d2..714f9e867e5f 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 6e8d2dc33d17..b91ec7dde7bc 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -326,4 +326,7 @@ 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


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 24/25] coresight: catu: allow catu drivers to be built as modules

[Tingwei Zhang]

Allow to build coresight-catu as modules, for ease of development.
- Kconfig becomes a tristate, to allow =m
- add catu_remove functions, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig          |  5 ++++-
 drivers/hwtracing/coresight/coresight-catu.c | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index b04aae2ceecc..dfe407cde262 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -42,7 +42,7 @@ config CORESIGHT_LINK_AND_SINK_TMC
 	  module will be called coresight-tmc.
 
 config CORESIGHT_CATU
-	bool "Coresight Address Translation Unit (CATU) driver"
+	tristate "Coresight Address Translation Unit (CATU) driver"
 	depends on CORESIGHT_LINK_AND_SINK_TMC
 	help
 	   Enable support for the Coresight Address Translation Unit (CATU).
@@ -52,6 +52,9 @@ config CORESIGHT_CATU
 	   by looking up the provided table. CATU can also be used in pass-through
 	   mode where the address is not translated.
 
+	   To compile this driver as a module, choose M here: the
+	   module will be called coresight-catu.
+
 config CORESIGHT_SINK_TPIU
 	tristate "Coresight generic TPIU driver"
 	depends on CORESIGHT_LINKS_AND_SINKS
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 47696a7d24a7..7428cbe67921 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -567,11 +567,21 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
+static int __exit catu_remove(struct amba_device *adev)
+{
+	struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+
+	coresight_unregister(drvdata->csdev);
+	return 0;
+}
+
 static struct amba_id catu_ids[] = {
 	CS_AMBA_ID(0x000bb9ee),
 	{},
 };
 
+MODULE_DEVICE_TABLE(amba, catu_ids);
+
 static struct amba_driver catu_driver = {
 	.drv = {
 		.name			= "coresight-catu",
@@ -579,6 +589,7 @@ static struct amba_driver catu_driver = {
 		.suppress_bind_attrs	= true,
 	},
 	.probe				= catu_probe,
+	.remove				= catu_remove,
 	.id_table			= catu_ids,
 };
 
@@ -601,3 +612,7 @@ static void __exit catu_exit(void)
 
 module_init(catu_init);
 module_exit(catu_exit);
+
+MODULE_AUTHOR("Suzuki K Poulose <suzuki.poulose@arm.com>");
+MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
+MODULE_LICENSE("GPL v2");
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 25/25] coresight: allow the coresight core driver to be built as a module

[Tingwei Zhang]

Enhance coresight developer's efficiency to debug coresight drivers.
- Kconfig becomes a tristate, to allow =m
- append -core to source file name to allow module to
  be called coresight by the Makefile
- modules can have only one init/exit, so we add the etm_perf
  register/unregister function calls to the core init/exit
  functions.
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
---
 drivers/hwtracing/coresight/Kconfig           |  5 ++-
 drivers/hwtracing/coresight/Makefile          |  5 ++-
 .../{coresight.c => coresight-core.c}         | 42 ++++++++++++++-----
 .../hwtracing/coresight/coresight-etm-perf.c  |  8 +++-
 .../hwtracing/coresight/coresight-etm-perf.h  |  3 ++
 5 files changed, 48 insertions(+), 15 deletions(-)
 rename drivers/hwtracing/coresight/{coresight.c => coresight-core.c} (98%)

diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index dfe407cde262..c1198245461d 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -3,7 +3,7 @@
 # Coresight configuration
 #
 menuconfig CORESIGHT
-	bool "CoreSight Tracing Support"
+	tristate "CoreSight Tracing Support"
 	depends on ARM || ARM64
 	depends on OF || ACPI
 	select ARM_AMBA
@@ -15,6 +15,9 @@ menuconfig CORESIGHT
 	  specification and configure the right series of components when a
 	  trace source gets enabled.
 
+	  To compile this driver as a module, choose M here: the
+	  module will be called coresight.
+
 if CORESIGHT
 config CORESIGHT_LINKS_AND_SINKS
 	tristate "CoreSight Link and Sink drivers"
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index 0359d5a1588f..1b35b55bd420 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -2,8 +2,9 @@
 #
 # Makefile for CoreSight drivers.
 #
-obj-$(CONFIG_CORESIGHT) += coresight.o coresight-etm-perf.o \
-			   coresight-platform.o coresight-sysfs.o
+obj-$(CONFIG_CORESIGHT) += coresight.o
+coresight-y := coresight-core.o  coresight-etm-perf.o coresight-platform.o \
+		coresight-sysfs.o
 obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o
 coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \
 		      coresight-tmc-etr.o
diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight-core.c
similarity index 98%
rename from drivers/hwtracing/coresight/coresight.c
rename to drivers/hwtracing/coresight/coresight-core.c
index 3b4abdda1f72..5cd200031613 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -1444,16 +1444,6 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value)
 }
 EXPORT_SYMBOL_GPL(coresight_timeout);
 
-struct bus_type coresight_bustype = {
-	.name	= "coresight",
-};
-
-static int __init coresight_init(void)
-{
-	return bus_register(&coresight_bustype);
-}
-postcore_initcall(coresight_init);
-
 /*
  * coresight_release_platform_data: Release references to the devices connected
  * to the output port of this device.
@@ -1662,3 +1652,35 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict,
 	return name;
 }
 EXPORT_SYMBOL_GPL(coresight_alloc_device_name);
+
+struct bus_type coresight_bustype = {
+	.name	= "coresight",
+};
+
+static int __init coresight_init(void)
+{
+	int ret;
+
+	ret = bus_register(&coresight_bustype);
+	if (ret)
+		return ret;
+
+	ret = etm_perf_init();
+	if (ret)
+		bus_unregister(&coresight_bustype);
+
+	return ret;
+}
+
+static void __exit coresight_exit(void)
+{
+	etm_perf_exit();
+	bus_unregister(&coresight_bustype);
+}
+
+module_init(coresight_init);
+module_exit(coresight_exit);
+
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
+MODULE_DESCRIPTION("Arm CoreSight tracer driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 3728c44e5763..668b3ff11576 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -591,7 +591,7 @@ void etm_perf_del_symlink_sink(struct coresight_device *csdev)
 	csdev->ea = NULL;
 }
 
-static int __init etm_perf_init(void)
+int __init etm_perf_init(void)
 {
 	int ret;
 
@@ -618,4 +618,8 @@ static int __init etm_perf_init(void)
 
 	return ret;
 }
-device_initcall(etm_perf_init);
+
+void __exit etm_perf_exit(void)
+{
+	perf_pmu_unregister(&etm_pmu);
+}
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h
index 05f89723e282..3e4f2ad5e193 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.h
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.h
@@ -82,4 +82,7 @@ static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
 
 #endif /* CONFIG_CORESIGHT */
 
+int __init etm_perf_init(void);
+void __exit etm_perf_exit(void);
+
 #endif
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 01/25] coresight: cpu_debug: add module name in Kconfig

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> Provide name of cpu_debug module in Kconfig help section.
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 02dbb5ca3bcf..4663fd1bbffc 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -110,6 +110,9 @@ config CORESIGHT_CPU_DEBUG
>           properly, please refer Documentation/trace/coresight/coresight-cpu-debug.rst
>           for detailed description and the example for usage.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-cpu-debug.
> +
>  config CORESIGHT_CTI
>         bool "CoreSight Cross Trigger Interface (CTI) driver"
>         depends on ARM || ARM64
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Tested by: Mike Leach <mike.leach@linaro.org>

-- 
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 05/25] coresight: export global symbols

[Mike Leach]

On Fri, 31 Jul 2020 at 07:40, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Mian Yousaf Kaukab <ykaukab@suse.de>
>
> Export symbols used among coresight modules.
>
> Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight-etm-perf.c | 1 +
>  drivers/hwtracing/coresight/coresight-sysfs.c    | 2 ++
>  drivers/hwtracing/coresight/coresight-tmc-etr.c  | 6 ++++++
>  drivers/hwtracing/coresight/coresight.c          | 8 ++++++++
>  4 files changed, 17 insertions(+)
>
> diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
> index 1a3169e69bb1..dcb0592418ae 100644
> --- a/drivers/hwtracing/coresight/coresight-etm-perf.c
> +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
> @@ -517,6 +517,7 @@ int etm_perf_symlink(struct coresight_device *csdev, bool link)
>
>         return 0;
>  }
> +EXPORT_SYMBOL_GPL(etm_perf_symlink);
>
>  static ssize_t etm_perf_sink_name_show(struct device *dev,
>                                        struct device_attribute *dattr,
> diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
> index 82afeaf2ccc4..34d2a2d31d00 100644
> --- a/drivers/hwtracing/coresight/coresight-sysfs.c
> +++ b/drivers/hwtracing/coresight/coresight-sysfs.c
> @@ -102,6 +102,7 @@ int coresight_add_sysfs_link(struct coresight_sysfs_link *info)
>
>         return ret;
>  }
> +EXPORT_SYMBOL_GPL(coresight_add_sysfs_link);
>
>  void coresight_remove_sysfs_link(struct coresight_sysfs_link *info)
>  {
> @@ -122,6 +123,7 @@ void coresight_remove_sysfs_link(struct coresight_sysfs_link *info)
>         info->orig->nr_links--;
>         info->target->nr_links--;
>  }
> +EXPORT_SYMBOL_GPL(coresight_remove_sysfs_link);
>
>  /*
>   * coresight_make_links: Make a link for a connection from a @orig
> diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
> index b29c2db94d96..ad991a37e2d2 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
> +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
> @@ -255,6 +255,7 @@ void tmc_free_sg_table(struct tmc_sg_table *sg_table)
>         tmc_free_table_pages(sg_table);
>         tmc_free_data_pages(sg_table);
>  }
> +EXPORT_SYMBOL_GPL(tmc_free_sg_table);
>
>  /*
>   * Alloc pages for the table. Since this will be used by the device,
> @@ -340,6 +341,7 @@ struct tmc_sg_table *tmc_alloc_sg_table(struct device *dev,
>
>         return sg_table;
>  }
> +EXPORT_SYMBOL_GPL(tmc_alloc_sg_table);
>
>  /*
>   * tmc_sg_table_sync_data_range: Sync the data buffer written
> @@ -360,6 +362,7 @@ void tmc_sg_table_sync_data_range(struct tmc_sg_table *table,
>                                         PAGE_SIZE, DMA_FROM_DEVICE);
>         }
>  }
> +EXPORT_SYMBOL_GPL(tmc_sg_table_sync_data_range);
>
>  /* tmc_sg_sync_table: Sync the page table */
>  void tmc_sg_table_sync_table(struct tmc_sg_table *sg_table)
> @@ -372,6 +375,7 @@ void tmc_sg_table_sync_table(struct tmc_sg_table *sg_table)
>                 dma_sync_single_for_device(real_dev, table_pages->daddrs[i],
>                                            PAGE_SIZE, DMA_TO_DEVICE);
>  }
> +EXPORT_SYMBOL_GPL(tmc_sg_table_sync_table);
>
>  /*
>   * tmc_sg_table_get_data: Get the buffer pointer for data @offset
> @@ -401,6 +405,7 @@ ssize_t tmc_sg_table_get_data(struct tmc_sg_table *sg_table,
>                 *bufpp = page_address(data_pages->pages[pg_idx]) + pg_offset;
>         return len;
>  }
> +EXPORT_SYMBOL_GPL(tmc_sg_table_get_data);
>
>  #ifdef ETR_SG_DEBUG
>  /* Map a dma address to virtual address */
> @@ -766,6 +771,7 @@ tmc_etr_get_catu_device(struct tmc_drvdata *drvdata)
>
>         return NULL;
>  }
> +EXPORT_SYMBOL_GPL(tmc_etr_get_catu_device);
>
>  static inline int tmc_etr_enable_catu(struct tmc_drvdata *drvdata,
>                                       struct etr_buf *etr_buf)
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 310b1b825dd1..b7151c5f81b1 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -55,6 +55,7 @@ static struct list_head *stm_path;
>   */
>  const u32 coresight_barrier_pkt[4] = {
>                 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
> +EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
>
>  static int coresight_id_match(struct device *dev, void *data)
>  {
> @@ -180,6 +181,7 @@ int coresight_claim_device_unlocked(void __iomem *base)
>         coresight_clear_claim_tags(base);
>         return -EBUSY;
>  }
> +EXPORT_SYMBOL_GPL(coresight_claim_device_unlocked);
>
>  int coresight_claim_device(void __iomem *base)
>  {
> @@ -191,6 +193,7 @@ int coresight_claim_device(void __iomem *base)
>
>         return rc;
>  }
> +EXPORT_SYMBOL_GPL(coresight_claim_device);
>
>  /*
>   * coresight_disclaim_device_unlocked : Clear the claim tags for the device.
> @@ -209,6 +212,7 @@ void coresight_disclaim_device_unlocked(void __iomem *base)
>                  */
>                 WARN_ON_ONCE(1);
>  }
> +EXPORT_SYMBOL_GPL(coresight_disclaim_device_unlocked);
>
>  void coresight_disclaim_device(void __iomem *base)
>  {
> @@ -216,6 +220,7 @@ void coresight_disclaim_device(void __iomem *base)
>         coresight_disclaim_device_unlocked(base);
>         CS_LOCK(base);
>  }
> +EXPORT_SYMBOL_GPL(coresight_disclaim_device);
>
>  /* enable or disable an associated CTI device of the supplied CS device */
>  static int
> @@ -468,6 +473,7 @@ void coresight_disable_path(struct list_head *path)
>  {
>         coresight_disable_path_from(path, NULL);
>  }
> +EXPORT_SYMBOL_GPL(coresight_disable_path);
>
>  int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data)
>  {
> @@ -1377,6 +1383,7 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value)
>
>         return -EAGAIN;
>  }
> +EXPORT_SYMBOL_GPL(coresight_timeout);
>
>  struct bus_type coresight_bustype = {
>         .name   = "coresight",
> @@ -1553,6 +1560,7 @@ bool coresight_loses_context_with_cpu(struct device *dev)
>         return fwnode_property_present(dev_fwnode(dev),
>                                        "arm,coresight-loses-context-with-cpu");
>  }
> +EXPORT_SYMBOL_GPL(coresight_loses_context_with_cpu);
>
>  /*
>   * coresight_alloc_device_name - Get an index for a given device in the
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 07/25] coresight: stm: allow to build coresight-stm as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> - Kconfig becomes a tristate, to allow =m
> - add a stm_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig         |  5 ++++-
>  drivers/hwtracing/coresight/coresight-stm.c | 20 +++++++++++++++++++-
>  2 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 4663fd1bbffc..6433f835fc97 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -86,7 +86,7 @@ config CORESIGHT_SOURCE_ETM4X
>           data tracing may also be available.
>
>  config CORESIGHT_STM
> -       bool "CoreSight System Trace Macrocell driver"
> +       tristate "CoreSight System Trace Macrocell driver"
>         depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
>         select CORESIGHT_LINKS_AND_SINKS
>         select STM
> @@ -96,6 +96,9 @@ config CORESIGHT_STM
>           logging useful software events or data coming from various entities
>           in the system, possibly running different OSs
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-stm.
> +
>  config CORESIGHT_CPU_DEBUG
>         tristate "CoreSight CPU Debug driver"
>         depends on ARM || ARM64
> diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
> index 673d2f56ed1e..b74072e78436 100644
> --- a/drivers/hwtracing/coresight/coresight-stm.c
> +++ b/drivers/hwtracing/coresight/coresight-stm.c
> @@ -948,6 +948,17 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
>         return ret;
>  }
>
> +static int __exit stm_remove(struct amba_device *adev)
> +{
> +       struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       stm_unregister_device(&drvdata->stm);
> +
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int stm_runtime_suspend(struct device *dev)
>  {
> @@ -980,6 +991,8 @@ static const struct amba_id stm_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, stm_ids);
> +
>  static struct amba_driver stm_driver = {
>         .drv = {
>                 .name   = "coresight-stm",
> @@ -988,7 +1001,12 @@ static struct amba_driver stm_driver = {
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = stm_probe,
> +       .remove         = stm_remove,
>         .id_table       = stm_ids,
>  };
>
> -builtin_amba_driver(stm_driver);
> +module_amba_driver(stm_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_DESCRIPTION("Arm CoreSight System Trace Macrocell driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 06/25] coresight: add try_get_module() in coresight_grab_device()

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> When coresight device is in an active session, driver module of
> that device should not be removed. Use try_get_module() in
> coresight_grab_device() to prevent module to be unloaded.
> Use get_device()/put_device() to protect device data
> in the middle of active session.
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight.c | 39 +++++++++++++++++++++----
>  1 file changed, 34 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index b7151c5f81b1..1626bc885dfe 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -640,7 +640,7 @@ struct coresight_device *coresight_get_sink_by_id(u32 id)
>   * don't appear on the trace path, they should be handled along with the
>   * the master device.
>   */
> -static void coresight_grab_device(struct coresight_device *csdev)
> +static int coresight_grab_device(struct coresight_device *csdev)
>  {
>         int i;
>
> @@ -648,10 +648,30 @@ static void coresight_grab_device(struct coresight_device *csdev)
>                 struct coresight_device *child;
>
>                 child  = csdev->pdata->conns[i].child_dev;
> -               if (child && child->type == CORESIGHT_DEV_TYPE_HELPER)
> +               if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
> +                       if (!try_module_get(child->dev.parent->driver->owner))
> +                               goto err;
> +                       get_device(child->dev.parent);
>                         pm_runtime_get_sync(child->dev.parent);
> +               }
>         }
> +       if (!try_module_get(csdev->dev.parent->driver->owner))
> +               goto err;
> +       get_device(csdev->dev.parent);
>         pm_runtime_get_sync(csdev->dev.parent);
> +       return 0;
> +err:
> +       for (i--; i >= 0; i--) {
> +               struct coresight_device *child;
> +
> +               child  = csdev->pdata->conns[i].child_dev;
> +               if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
> +                       pm_runtime_put(child->dev.parent);
> +                       put_device(child->dev.parent);
> +                       module_put(child->dev.parent->driver->owner);
> +               }
> +       }
> +       return -ENODEV;
>  }
>
>  /*
> @@ -663,12 +683,17 @@ static void coresight_drop_device(struct coresight_device *csdev)
>         int i;
>
>         pm_runtime_put(csdev->dev.parent);
> +       put_device(csdev->dev.parent);
> +       module_put(csdev->dev.parent->driver->owner);
>         for (i = 0; i < csdev->pdata->nr_outport; i++) {
>                 struct coresight_device *child;
>
>                 child  = csdev->pdata->conns[i].child_dev;
> -               if (child && child->type == CORESIGHT_DEV_TYPE_HELPER)
> +               if (child && child->type == CORESIGHT_DEV_TYPE_HELPER) {
>                         pm_runtime_put(child->dev.parent);
> +                       put_device(child->dev.parent);
> +                       module_put(child->dev.parent->driver->owner);
> +               }
>         }
>  }
>
> @@ -687,7 +712,7 @@ static int _coresight_build_path(struct coresight_device *csdev,
>                                  struct coresight_device *sink,
>                                  struct list_head *path)
>  {
> -       int i;
> +       int i, ret;
>         bool found = false;
>         struct coresight_node *node;
>
> @@ -721,7 +746,11 @@ static int _coresight_build_path(struct coresight_device *csdev,
>         if (!node)
>                 return -ENOMEM;
>
> -       coresight_grab_device(csdev);
> +       ret = coresight_grab_device(csdev);
> +       if (ret) {
> +               kfree(node);
> +               return ret;
> +       }
>         node->csdev = csdev;
>         list_add(&node->link, path);
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>

--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 10/25] coresight: etm4x: allow etm4x to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-etm4x as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>   be called coresight-etm4x by the Makefile
> - add an etm4_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 +++-
>  drivers/hwtracing/coresight/Makefile          |  4 +--
>  ...resight-etm4x.c => coresight-etm4x-core.c} | 26 ++++++++++++++++++-
>  3 files changed, 31 insertions(+), 4 deletions(-)
>  rename drivers/hwtracing/coresight/{coresight-etm4x.c => coresight-etm4x-core.c} (98%)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 8fd9fd139cf3..d6e107bbd30b 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -78,7 +78,7 @@ config CORESIGHT_SOURCE_ETM3X
>           module will be called coresight-etm3x.
>
>  config CORESIGHT_SOURCE_ETM4X
> -       bool "CoreSight Embedded Trace Macrocell 4.x driver"
> +       tristate "CoreSight Embedded Trace Macrocell 4.x driver"
>         depends on ARM64
>         select CORESIGHT_LINKS_AND_SINKS
>         select PID_IN_CONTEXTIDR
> @@ -88,6 +88,9 @@ config CORESIGHT_SOURCE_ETM4X
>           for instruction level tracing. Depending on the implemented version
>           data tracing may also be available.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-etm4x.
> +
>  config CORESIGHT_STM
>         tristate "CoreSight System Trace Macrocell driver"
>         depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index d619cfd0abd8..271dc255454f 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -14,8 +14,8 @@ obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
>  obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o
>  coresight-etm3x-y := coresight-etm3x-core.o coresight-etm-cp14.o \
>                                         coresight-etm3x-sysfs.o
> -obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
> -                                       coresight-etm4x-sysfs.o
> +obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o
> +coresight-etm4x-y := coresight-etm4x-core.o coresight-etm4x-sysfs.o
>  obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
>  obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
>  obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> similarity index 98%
> rename from drivers/hwtracing/coresight/coresight-etm4x.c
> rename to drivers/hwtracing/coresight/coresight-etm4x-core.c
> index 6d7d2169bfb2..8149853d5e9d 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> @@ -1573,6 +1573,21 @@ static struct amba_cs_uci_id uci_id_etm4[] = {
>         }
>  };
>
> +static int __exit etm4_remove(struct amba_device *adev)
> +{
> +       struct etmv4_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       etm_perf_symlink(drvdata->csdev, false);
> +
> +       etmdrvdata[drvdata->cpu] = NULL;
> +       etm4_pm_clear();
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
> +
>  static const struct amba_id etm4_ids[] = {
>         CS_AMBA_ID(0x000bb95d),                 /* Cortex-A53 */
>         CS_AMBA_ID(0x000bb95e),                 /* Cortex-A57 */
> @@ -1590,12 +1605,21 @@ static const struct amba_id etm4_ids[] = {
>         {},
>  };
>
> +MODULE_DEVICE_TABLE(amba, etm4_ids);
> +
>  static struct amba_driver etm4x_driver = {
>         .drv = {
>                 .name   = "coresight-etm4x",
> +               .owner  = THIS_MODULE,
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = etm4_probe,
> +       .remove         = etm4_remove,
>         .id_table       = etm4_ids,
>  };
> -builtin_amba_driver(etm4x_driver);
> +module_amba_driver(etm4x_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace v4 driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>

--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 09/25] coresight: etm3x: allow etm3x to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-etm3x as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>   be called coresight-etm3x by the Makefile
> - add an etm_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 +++-
>  drivers/hwtracing/coresight/Makefile          |  3 ++-
>  ...resight-etm3x.c => coresight-etm3x-core.c} | 27 ++++++++++++++++++-
>  3 files changed, 32 insertions(+), 3 deletions(-)
>  rename drivers/hwtracing/coresight/{coresight-etm3x.c => coresight-etm3x-core.c} (97%)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 6433f835fc97..8fd9fd139cf3 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -65,7 +65,7 @@ config CORESIGHT_SINK_ETBV10
>           special enhancement or added features.
>
>  config CORESIGHT_SOURCE_ETM3X
> -       bool "CoreSight Embedded Trace Macrocell 3.x driver"
> +       tristate "CoreSight Embedded Trace Macrocell 3.x driver"
>         depends on !ARM64
>         select CORESIGHT_LINKS_AND_SINKS
>         help
> @@ -74,6 +74,9 @@ config CORESIGHT_SOURCE_ETM3X
>           This is primarily useful for instruction level tracing.  Depending
>           the ETM version data tracing may also be available.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-etm3x.
> +
>  config CORESIGHT_SOURCE_ETM4X
>         bool "CoreSight Embedded Trace Macrocell 4.x driver"
>         depends on ARM64
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index 19497d1d92bf..d619cfd0abd8 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -11,7 +11,8 @@ obj-$(CONFIG_CORESIGHT_SINK_TPIU) += coresight-tpiu.o
>  obj-$(CONFIG_CORESIGHT_SINK_ETBV10) += coresight-etb10.o
>  obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
>                                            coresight-replicator.o
> -obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \
> +obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o
> +coresight-etm3x-y := coresight-etm3x-core.o coresight-etm-cp14.o \
>                                         coresight-etm3x-sysfs.o
>  obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
>                                         coresight-etm4x-sysfs.o
> diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
> similarity index 97%
> rename from drivers/hwtracing/coresight/coresight-etm3x.c
> rename to drivers/hwtracing/coresight/coresight-etm3x-core.c
> index bf22dcfd3327..82b333c40006 100644
> --- a/drivers/hwtracing/coresight/coresight-etm3x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
> @@ -895,6 +895,23 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
>         return ret;
>  }
>
> +static int __exit etm_remove(struct amba_device *adev)
> +{
> +       struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       etm_perf_symlink(drvdata->csdev, false);
> +
> +       if (--etm_count == 0) {
> +               cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING);
> +               if (hp_online)
> +                       cpuhp_remove_state_nocalls(hp_online);
> +       }
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int etm_runtime_suspend(struct device *dev)
>  {
> @@ -937,6 +954,8 @@ static const struct amba_id etm_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, etm_ids);
> +
>  static struct amba_driver etm_driver = {
>         .drv = {
>                 .name   = "coresight-etm3x",
> @@ -945,6 +964,12 @@ static struct amba_driver etm_driver = {
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = etm_probe,
> +       .remove         = etm_remove,
>         .id_table       = etm_ids,
>  };
> -builtin_amba_driver(etm_driver);
> +module_amba_driver(etm_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Program Flow Trace driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Reviewed by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 08/25] coresight: etm: perf: Fix warning caused by etm_setup_aux failure

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> When coresight_build_path() fails on all the cpus, etm_setup_aux
> calls etm_free_aux() to free allocated event_data.
> WARN_ON(cpumask_empty(mask) will be triggered since cpu mask is empty.
> Check event_data->snk_config is not NULL first to avoid this
> warning.
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight-etm-perf.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
> index dcb0592418ae..3728c44e5763 100644
> --- a/drivers/hwtracing/coresight/coresight-etm-perf.c
> +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
> @@ -126,10 +126,10 @@ static void free_sink_buffer(struct etm_event_data *event_data)
>         cpumask_t *mask = &event_data->mask;
>         struct coresight_device *sink;
>
> -       if (WARN_ON(cpumask_empty(mask)))
> +       if (!event_data->snk_config)
>                 return;
>
> -       if (!event_data->snk_config)
> +       if (WARN_ON(cpumask_empty(mask)))
>                 return;
>
>         cpu = cpumask_first(mask);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Reviewed by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 12/25] coresight: tpiu: allow tpiu to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-tpiu as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - add a tpiu_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig          |  5 ++++-
>  drivers/hwtracing/coresight/coresight-tpiu.c | 19 ++++++++++++++++++-
>  2 files changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 996d84a1edb8..8fd9887fb03b 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -46,7 +46,7 @@ config CORESIGHT_CATU
>            mode where the address is not translated.
>
>  config CORESIGHT_SINK_TPIU
> -       bool "Coresight generic TPIU driver"
> +       tristate "Coresight generic TPIU driver"
>         depends on CORESIGHT_LINKS_AND_SINKS
>         help
>           This enables support for the Trace Port Interface Unit driver,
> @@ -56,6 +56,9 @@ config CORESIGHT_SINK_TPIU
>           connected to an external host for use case capturing more traces than
>           the on-board coresight memory can handle.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-tpiu.
> +
>  config CORESIGHT_SINK_ETBV10
>         tristate "Coresight ETBv1.0 driver"
>         depends on CORESIGHT_LINKS_AND_SINKS
> diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
> index f8583e4032a6..e4ddd9801535 100644
> --- a/drivers/hwtracing/coresight/coresight-tpiu.c
> +++ b/drivers/hwtracing/coresight/coresight-tpiu.c
> @@ -173,6 +173,15 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
>         return PTR_ERR(drvdata->csdev);
>  }
>
> +static int __exit tpiu_remove(struct amba_device *adev)
> +{
> +       struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int tpiu_runtime_suspend(struct device *dev)
>  {
> @@ -216,6 +225,8 @@ static const struct amba_id tpiu_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, tpiu_ids);
> +
>  static struct amba_driver tpiu_driver = {
>         .drv = {
>                 .name   = "coresight-tpiu",
> @@ -224,6 +235,12 @@ static struct amba_driver tpiu_driver = {
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = tpiu_probe,
> +       .remove         = tpiu_remove,
>         .id_table       = tpiu_ids,
>  };
> -builtin_amba_driver(tpiu_driver);
> +module_amba_driver(tpiu_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight TPIU (Trace Port Interface Unit) driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Reviewed by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 11/25] coresight: etb: allow etb to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-etb10 as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - add an etb_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 ++++-
>  drivers/hwtracing/coresight/coresight-etb10.c | 20 ++++++++++++++++++-
>  2 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index d6e107bbd30b..996d84a1edb8 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -57,13 +57,16 @@ config CORESIGHT_SINK_TPIU
>           the on-board coresight memory can handle.
>
>  config CORESIGHT_SINK_ETBV10
> -       bool "Coresight ETBv1.0 driver"
> +       tristate "Coresight ETBv1.0 driver"
>         depends on CORESIGHT_LINKS_AND_SINKS
>         help
>           This enables support for the Embedded Trace Buffer version 1.0 driver
>           that complies with the generic implementation of the component without
>           special enhancement or added features.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-etb10.
> +
>  config CORESIGHT_SOURCE_ETM3X
>         tristate "CoreSight Embedded Trace Macrocell 3.x driver"
>         depends on !ARM64
> diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
> index 04ee9cda988d..b40756497c9a 100644
> --- a/drivers/hwtracing/coresight/coresight-etb10.c
> +++ b/drivers/hwtracing/coresight/coresight-etb10.c
> @@ -801,6 +801,16 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
>         return ret;
>  }
>
> +static int __exit etb_remove(struct amba_device *adev)
> +{
> +       struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       misc_deregister(&drvdata->miscdev);
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int etb_runtime_suspend(struct device *dev)
>  {
> @@ -835,6 +845,8 @@ static const struct amba_id etb_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, etb_ids);
> +
>  static struct amba_driver etb_driver = {
>         .drv = {
>                 .name   = "coresight-etb10",
> @@ -844,6 +856,12 @@ static struct amba_driver etb_driver = {
>
>         },
>         .probe          = etb_probe,
> +       .remove         = etb_remove,
>         .id_table       = etb_ids,
>  };
> -builtin_amba_driver(etb_driver);
> +module_amba_driver(etb_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Embedded Trace Buffer driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 13/25] coresight: tmc: allow tmc to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-tmc as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>   be called coresight-tmc by the Makefile
> - add an tmc_remove function, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  6 +++++-
>  drivers/hwtracing/coresight/Makefile          |  6 +++---
>  .../{coresight-tmc.c => coresight-tmc-core.c} | 19 ++++++++++++++++++-
>  3 files changed, 26 insertions(+), 5 deletions(-)
>  rename drivers/hwtracing/coresight/{coresight-tmc.c => coresight-tmc-core.c} (96%)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 8fd9887fb03b..fc48ae086746 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -25,7 +25,8 @@ config CORESIGHT_LINKS_AND_SINKS
>           entity at run time to form a complete trace path.
>
>  config CORESIGHT_LINK_AND_SINK_TMC
> -       bool "Coresight generic TMC driver"
> +       tristate "Coresight generic TMC driver"
> +
>         depends on CORESIGHT_LINKS_AND_SINKS
>         help
>           This enables support for the Trace Memory Controller driver.
> @@ -34,6 +35,9 @@ config CORESIGHT_LINK_AND_SINK_TMC
>           complies with the generic implementation of the component without
>           special enhancement or added features.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-tmc.
> +
>  config CORESIGHT_CATU
>         bool "Coresight Address Translation Unit (CATU) driver"
>         depends on CORESIGHT_LINK_AND_SINK_TMC
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index 271dc255454f..f2a568b969c4 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -4,9 +4,9 @@
>  #
>  obj-$(CONFIG_CORESIGHT) += coresight.o coresight-etm-perf.o \
>                            coresight-platform.o coresight-sysfs.o
> -obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o \
> -                                            coresight-tmc-etf.o \
> -                                            coresight-tmc-etr.o
> +obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o
> +coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \
> +                     coresight-tmc-etr.o
>  obj-$(CONFIG_CORESIGHT_SINK_TPIU) += coresight-tpiu.o
>  obj-$(CONFIG_CORESIGHT_SINK_ETBV10) += coresight-etb10.o
>  obj-$(CONFIG_CORESIGHT_LINKS_AND_SINKS) += coresight-funnel.o \
> diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
> similarity index 96%
> rename from drivers/hwtracing/coresight/coresight-tmc.c
> rename to drivers/hwtracing/coresight/coresight-tmc-core.c
> index 7040d583bed9..29d191ba7ccf 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc.c
> +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
> @@ -561,6 +561,16 @@ static void tmc_shutdown(struct amba_device *adev)
>         spin_unlock_irqrestore(&drvdata->spinlock, flags);
>  }
>
> +static int __exit tmc_remove(struct amba_device *adev)
> +{
> +       struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       misc_deregister(&drvdata->miscdev);
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
>  static const struct amba_id tmc_ids[] = {
>         CS_AMBA_ID(0x000bb961),
>         /* Coresight SoC 600 TMC-ETR/ETS */
> @@ -572,6 +582,8 @@ static const struct amba_id tmc_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, tmc_ids);
> +
>  static struct amba_driver tmc_driver = {
>         .drv = {
>                 .name   = "coresight-tmc",
> @@ -580,6 +592,11 @@ static struct amba_driver tmc_driver = {
>         },
>         .probe          = tmc_probe,
>         .shutdown       = tmc_shutdown,
> +       .remove         = tmc_remove,
>         .id_table       = tmc_ids,
>  };
> -builtin_amba_driver(tmc_driver);
> +module_amba_driver(tmc_driver);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Trace Memory Controller driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 14/25] coresight: funnel: remove multiple init calls from funnel driver

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Mian Yousaf Kaukab <ykaukab@suse.de>
>
> Dynamic-funnel uses module_amba_driver to register. Whereas
> static-funnel uses builtin_platform_driver. Combine these init calls
> into a single module_init/exit pair in preparation to make the driver
> modular.
>
> Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  .../hwtracing/coresight/coresight-funnel.c    | 30 +++++++++++++++++--
>  1 file changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 900690a9f7f0..46b277ed8606 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -341,7 +341,6 @@ static struct platform_driver static_funnel_driver = {
>                 .suppress_bind_attrs = true,
>         },
>  };
> -builtin_platform_driver(static_funnel_driver);
>
>  static int dynamic_funnel_probe(struct amba_device *adev,
>                                 const struct amba_id *id)
> @@ -372,4 +371,31 @@ static struct amba_driver dynamic_funnel_driver = {
>         .probe          = dynamic_funnel_probe,
>         .id_table       = dynamic_funnel_ids,
>  };
> -builtin_amba_driver(dynamic_funnel_driver);
> +
> +static int __init funnel_init(void)
> +{
> +       int ret;
> +
> +       ret = platform_driver_register(&static_funnel_driver);
> +       if (ret) {
> +               pr_info("Error registering platform driver\n");
> +               return ret;
> +       }
> +
> +       ret = amba_driver_register(&dynamic_funnel_driver);
> +       if (ret) {
> +               pr_info("Error registering amba driver\n");
> +               platform_driver_unregister(&static_funnel_driver);
> +       }
> +
> +       return ret;
> +}
> +
> +static void __exit funnel_exit(void)
> +{
> +       platform_driver_unregister(&static_funnel_driver);
> +       amba_driver_unregister(&dynamic_funnel_driver);
> +}
> +
> +module_init(funnel_init);
> +module_exit(funnel_exit);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 15/25] coresight: replicator: remove multiple init calls

[Mike Leach]

On Fri, 31 Jul 2020 at 07:41, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Mian Yousaf Kaukab <ykaukab@suse.de>
>
> Dynamic-replicator uses module_amba_driver to register. Whereas
> static-replicator uses builtin_platform_driver. Combine these init
> calls into a single module_init/exit pair in preparation to make the
> driver modular.
>
> Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  .../coresight/coresight-replicator.c          | 30 +++++++++++++++++--
>  1 file changed, 28 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 78acf29c49ca..6b30bcee7458 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -360,7 +360,6 @@ static struct platform_driver static_replicator_driver = {
>                 .suppress_bind_attrs = true,
>         },
>  };
> -builtin_platform_driver(static_replicator_driver);
>
>  static int dynamic_replicator_probe(struct amba_device *adev,
>                                     const struct amba_id *id)
> @@ -383,4 +382,31 @@ static struct amba_driver dynamic_replicator_driver = {
>         .probe          = dynamic_replicator_probe,
>         .id_table       = dynamic_replicator_ids,
>  };
> -builtin_amba_driver(dynamic_replicator_driver);
> +
> +static int __init replicator_init(void)
> +{
> +       int ret;
> +
> +       ret = platform_driver_register(&static_replicator_driver);
> +       if (ret) {
> +               pr_info("Error registering platform driver\n");
> +               return ret;
> +       }
> +
> +       ret = amba_driver_register(&dynamic_replicator_driver);
> +       if (ret) {
> +               pr_info("Error registering amba driver\n");
> +               platform_driver_unregister(&static_replicator_driver);
> +       }
> +
> +       return ret;
> +}
> +
> +static void __exit replicator_exit(void)
> +{
> +       platform_driver_unregister(&static_replicator_driver);
> +       amba_driver_unregister(&dynamic_replicator_driver);
> +}
> +
> +module_init(replicator_init);
> +module_exit(replicator_exit);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 17/25] coresight: cti: add function to register cti associate ops

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> Add static cti_assoc_ops to coresight core driver. Let cti
> driver register the add_assoc and remove_assoc call back.
> Avoid coresight core driver to depend on cti driver.
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight-cti.c  | 32 ++++++++++++++++++--
>  drivers/hwtracing/coresight/coresight-priv.h | 14 ++++-----
>  drivers/hwtracing/coresight/coresight.c      | 21 +++++++++++--
>  3 files changed, 53 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c
> index 3ccc703dc940..1f470c47ba70 100644
> --- a/drivers/hwtracing/coresight/coresight-cti.c
> +++ b/drivers/hwtracing/coresight/coresight-cti.c
> @@ -589,7 +589,6 @@ void cti_add_assoc_to_csdev(struct coresight_device *csdev)
>  cti_add_done:
>         mutex_unlock(&ect_mutex);
>  }
> -EXPORT_SYMBOL_GPL(cti_add_assoc_to_csdev);
>
>  /*
>   * Removing the associated devices is easier.
> @@ -616,7 +615,15 @@ void cti_remove_assoc_from_csdev(struct coresight_device *csdev)
>         }
>         mutex_unlock(&ect_mutex);
>  }
> -EXPORT_SYMBOL_GPL(cti_remove_assoc_from_csdev);
> +
> +/*
> + * Operations to add and remove associated CTI.
> + * Register to coresight core driver as call back function.
> + */
> +static struct cti_assoc_op cti_assoc_ops = {
> +       .add = cti_add_assoc_to_csdev,
> +       .remove = cti_remove_assoc_from_csdev
> +};
>
>  /*
>   * Update the cross references where the associated device was found
> @@ -972,4 +979,23 @@ static struct amba_driver cti_driver = {
>         .probe          = cti_probe,
>         .id_table       = cti_ids,
>  };
> -builtin_amba_driver(cti_driver);
> +
> +static int __init cti_init(void)
> +{
> +       int ret;
> +
> +       ret = amba_driver_register(&cti_driver);
> +       if (ret)
> +               pr_info("Error registering cti driver\n");
> +       coresight_set_cti_ops(&cti_assoc_ops);
> +       return ret;
> +}
> +
> +static void __exit cti_exit(void)
> +{
> +       coresight_remove_cti_ops();
> +       amba_driver_unregister(&cti_driver);
> +}
> +
> +module_init(cti_init);
> +module_exit(cti_exit);
> diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
> index dcb8aeb6af62..6cde6cf42554 100644
> --- a/drivers/hwtracing/coresight/coresight-priv.h
> +++ b/drivers/hwtracing/coresight/coresight-priv.h
> @@ -173,15 +173,13 @@ static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
>  static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
>  #endif
>
> -#ifdef CONFIG_CORESIGHT_CTI
> -extern void cti_add_assoc_to_csdev(struct coresight_device *csdev);
> -extern void cti_remove_assoc_from_csdev(struct coresight_device *csdev);
> +struct cti_assoc_op {
> +       void (*add)(struct coresight_device *csdev);
> +       void (*remove)(struct coresight_device *csdev);
> +};
>
> -#else
> -static inline void cti_add_assoc_to_csdev(struct coresight_device *csdev) {}
> -static inline void
> -cti_remove_assoc_from_csdev(struct coresight_device *csdev) {}
> -#endif
> +extern void coresight_set_cti_ops(const struct cti_assoc_op *cti_op);
> +extern void coresight_remove_cti_ops(void);
>
>  /*
>   * Macros and inline functions to handle CoreSight UCI data and driver
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 1626bc885dfe..25578579559b 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -57,6 +57,20 @@ const u32 coresight_barrier_pkt[4] = {
>                 0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff};
>  EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
>
> +static const struct cti_assoc_op *cti_assoc_ops;
> +
> +void coresight_set_cti_ops(const struct cti_assoc_op *cti_op)
> +{
> +       cti_assoc_ops = cti_op;
> +}
> +EXPORT_SYMBOL_GPL(coresight_set_cti_ops);
> +
> +void coresight_remove_cti_ops(void)
> +{
> +       cti_assoc_ops = NULL;
> +}
> +EXPORT_SYMBOL_GPL(coresight_remove_cti_ops);
> +
>  static int coresight_id_match(struct device *dev, void *data)
>  {
>         int trace_id, i_trace_id;
> @@ -1224,7 +1238,8 @@ static void coresight_device_release(struct device *dev)
>  {
>         struct coresight_device *csdev = to_coresight_device(dev);
>
> -       cti_remove_assoc_from_csdev(csdev);
> +       if (cti_assoc_ops && cti_assoc_ops->remove)
> +               cti_assoc_ops->remove(csdev);
>         fwnode_handle_put(csdev->dev.fwnode);
>         kfree(csdev->refcnt);
>         kfree(csdev);
> @@ -1535,8 +1550,8 @@ struct coresight_device *coresight_register(struct coresight_desc *desc)
>                 ret = coresight_fixup_device_conns(csdev);
>         if (!ret)
>                 ret = coresight_fixup_orphan_conns(csdev);
> -       if (!ret)
> -               cti_add_assoc_to_csdev(csdev);
> +       if (!ret && cti_assoc_ops && cti_assoc_ops->add)
> +               cti_assoc_ops->add(csdev);
>
>         mutex_unlock(&coresight_mutex);
>         if (ret) {
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 16/25] coresight: allow funnel and replicator drivers to be built as modules

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> From: Kim Phillips <kim.phillips@arm.com>
>
> Allow to build coresight-funnel and coresight-replicator as modules,
> for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - add funnel_remove and replicator_remove functions,
>   for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 ++-
>  .../hwtracing/coresight/coresight-funnel.c    | 32 ++++++++++++++++++
>  .../coresight/coresight-replicator.c          | 33 +++++++++++++++++++
>  3 files changed, 69 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index fc48ae086746..f31778dd0b5d 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -17,13 +17,16 @@ menuconfig CORESIGHT
>
>  if CORESIGHT
>  config CORESIGHT_LINKS_AND_SINKS
> -       bool "CoreSight Link and Sink drivers"
> +       tristate "CoreSight Link and Sink drivers"
>         help
>           This enables support for CoreSight link and sink drivers that are
>           responsible for transporting and collecting the trace data
>           respectively.  Link and sinks are dynamically aggregated with a trace
>           entity at run time to form a complete trace path.
>
> +         To compile these drivers as modules, choose M here: the
> +         modules will be called coresight-funnel and coresight-replicator.
> +
>  config CORESIGHT_LINK_AND_SINK_TMC
>         tristate "Coresight generic TMC driver"
>
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 46b277ed8606..062694ef9879 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -274,6 +274,15 @@ static int funnel_probe(struct device *dev, struct resource *res)
>         return ret;
>  }
>
> +static int __exit funnel_remove(struct device *dev)
> +{
> +       struct funnel_drvdata *drvdata = dev_get_drvdata(dev);
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int funnel_runtime_suspend(struct device *dev)
>  {
> @@ -319,20 +328,31 @@ static int static_funnel_probe(struct platform_device *pdev)
>         return ret;
>  }
>
> +static int __exit static_funnel_remove(struct platform_device *pdev)
> +{
> +       funnel_remove(&pdev->dev);
> +       pm_runtime_disable(&pdev->dev);
> +       return 0;
> +}
> +
>  static const struct of_device_id static_funnel_match[] = {
>         {.compatible = "arm,coresight-static-funnel"},
>         {}
>  };
>
> +MODULE_DEVICE_TABLE(of, static_funnel_match);
> +
>  #ifdef CONFIG_ACPI
>  static const struct acpi_device_id static_funnel_ids[] = {
>         {"ARMHC9FE", 0},
>         {},
>  };
> +MODULE_DEVICE_TABLE(acpi, static_funnel_ids);
>  #endif
>
>  static struct platform_driver static_funnel_driver = {
>         .probe          = static_funnel_probe,
> +       .probe          = static_funnel_remove,
>         .driver         = {
>                 .name   = "coresight-static-funnel",
>                 .of_match_table = static_funnel_match,
> @@ -348,6 +368,11 @@ static int dynamic_funnel_probe(struct amba_device *adev,
>         return funnel_probe(&adev->dev, &adev->res);
>  }
>
> +static int __exit dynamic_funnel_remove(struct amba_device *adev)
> +{
> +       return funnel_remove(&adev->dev);
> +}
> +
>  static const struct amba_id dynamic_funnel_ids[] = {
>         {
>                 .id     = 0x000bb908,
> @@ -361,6 +386,8 @@ static const struct amba_id dynamic_funnel_ids[] = {
>         { 0, 0},
>  };
>
> +MODULE_DEVICE_TABLE(amba, dynamic_funnel_ids);
> +
>  static struct amba_driver dynamic_funnel_driver = {
>         .drv = {
>                 .name   = "coresight-dynamic-funnel",
> @@ -369,6 +396,7 @@ static struct amba_driver dynamic_funnel_driver = {
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = dynamic_funnel_probe,
> +       .remove         = dynamic_funnel_remove,
>         .id_table       = dynamic_funnel_ids,
>  };
>
> @@ -399,3 +427,7 @@ static void __exit funnel_exit(void)
>
>  module_init(funnel_init);
>  module_exit(funnel_exit);
> +
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Funnel Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 6b30bcee7458..05db434c79d0 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -291,6 +291,14 @@ static int replicator_probe(struct device *dev, struct resource *res)
>         return ret;
>  }
>
> +static int __exit replicator_remove(struct device *dev)
> +{
> +       struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
> +
> +       coresight_unregister(drvdata->csdev);
> +       return 0;
> +}
> +
>  static int static_replicator_probe(struct platform_device *pdev)
>  {
>         int ret;
> @@ -310,6 +318,13 @@ static int static_replicator_probe(struct platform_device *pdev)
>         return ret;
>  }
>
> +static int __exit static_replicator_remove(struct platform_device *pdev)
> +{
> +       replicator_remove(&pdev->dev);
> +       pm_runtime_disable(&pdev->dev);
> +       return 0;
> +}
> +
>  #ifdef CONFIG_PM
>  static int replicator_runtime_suspend(struct device *dev)
>  {
> @@ -342,18 +357,22 @@ static const struct of_device_id static_replicator_match[] = {
>         {.compatible = "arm,coresight-static-replicator"},
>         {}
>  };
> +MODULE_DEVICE_TABLE(of, static_replicator_match);
>
>  #ifdef CONFIG_ACPI
>  static const struct acpi_device_id static_replicator_acpi_ids[] = {
>         {"ARMHC985", 0}, /* ARM CoreSight Static Replicator */
>         {}
>  };
> +MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids);
>  #endif
>
>  static struct platform_driver static_replicator_driver = {
>         .probe          = static_replicator_probe,
> +       .remove         = static_replicator_remove,
>         .driver         = {
>                 .name   = "coresight-static-replicator",
> +               .owner  = THIS_MODULE,
>                 .of_match_table = of_match_ptr(static_replicator_match),
>                 .acpi_match_table = ACPI_PTR(static_replicator_acpi_ids),
>                 .pm     = &replicator_dev_pm_ops,
> @@ -367,19 +386,28 @@ static int dynamic_replicator_probe(struct amba_device *adev,
>         return replicator_probe(&adev->dev, &adev->res);
>  }
>
> +static int __exit dynamic_replicator_remove(struct amba_device *adev)
> +{
> +       return replicator_remove(&adev->dev);
> +}
> +
>  static const struct amba_id dynamic_replicator_ids[] = {
>         CS_AMBA_ID(0x000bb909),
>         CS_AMBA_ID(0x000bb9ec),         /* Coresight SoC-600 */
>         {},
>  };
>
> +MODULE_DEVICE_TABLE(amba, dynamic_replicator_ids);
> +
>  static struct amba_driver dynamic_replicator_driver = {
>         .drv = {
>                 .name   = "coresight-dynamic-replicator",
>                 .pm     = &replicator_dev_pm_ops,
> +               .owner  = THIS_MODULE,
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = dynamic_replicator_probe,
> +       .remove         = dynamic_replicator_remove,
>         .id_table       = dynamic_replicator_ids,
>  };
>
> @@ -410,3 +438,8 @@ static void __exit replicator_exit(void)
>
>  module_init(replicator_init);
>  module_exit(replicator_exit);
> +
> +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 22/25] coresight: cti: allow cti to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> Allow to build coresight-cti as a module, for ease of development.
>
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>   be called coresight-cti by the Makefile
> - add an cti_remove function, for module unload
> - move cti_remove_conn_xrefs to cti_remove
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 ++++-
>  drivers/hwtracing/coresight/Makefile          |  4 ++--
>  .../{coresight-cti.c => coresight-cti-core.c} | 19 ++++++++++++++++++-
>  .../hwtracing/coresight/coresight-platform.c  |  1 +
>  drivers/hwtracing/coresight/coresight.c       |  1 +
>  5 files changed, 26 insertions(+), 4 deletions(-)
>  rename drivers/hwtracing/coresight/{coresight-cti.c => coresight-cti-core.c} (98%)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index f31778dd0b5d..b04aae2ceecc 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -136,7 +136,7 @@ config CORESIGHT_CPU_DEBUG
>           module will be called coresight-cpu-debug.
>
>  config CORESIGHT_CTI
> -       bool "CoreSight Cross Trigger Interface (CTI) driver"
> +       tristate "CoreSight Cross Trigger Interface (CTI) driver"
>         depends on ARM || ARM64
>         help
>           This driver provides support for CoreSight CTI and CTM components.
> @@ -147,6 +147,9 @@ config CORESIGHT_CTI
>           halt compared to disabling sources and sinks normally in driver
>           software.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight-cti.
> +
>  config CORESIGHT_CTI_INTEGRATION_REGS
>         bool "Access CTI CoreSight Integration Registers"
>         depends on CORESIGHT_CTI
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index f2a568b969c4..0359d5a1588f 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -19,6 +19,6 @@ coresight-etm4x-y := coresight-etm4x-core.o coresight-etm4x-sysfs.o
>  obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
>  obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
>  obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
> -obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o \
> -                               coresight-cti-platform.o \
> +obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o
> +coresight-cti-y := coresight-cti-core.o        coresight-cti-platform.o \
>                                 coresight-cti-sysfs.o
> diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti-core.c
> similarity index 98%
> rename from drivers/hwtracing/coresight/coresight-cti.c
> rename to drivers/hwtracing/coresight/coresight-cti-core.c
> index 6bb06c5715db..ca31da6cf1c0 100644
> --- a/drivers/hwtracing/coresight/coresight-cti.c
> +++ b/drivers/hwtracing/coresight/coresight-cti-core.c
> @@ -838,7 +838,6 @@ static void cti_device_release(struct device *dev)
>         struct cti_drvdata *ect_item, *ect_tmp;
>
>         mutex_lock(&ect_mutex);
> -       cti_remove_conn_xrefs(drvdata);
>         cti_pm_release(drvdata);
>
>         /* remove from the list */
> @@ -853,6 +852,18 @@ static void cti_device_release(struct device *dev)
>         if (drvdata->csdev_release)
>                 drvdata->csdev_release(dev);
>  }
> +static int __exit cti_remove(struct amba_device *adev)
> +{
> +       struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       mutex_lock(&ect_mutex);
> +       cti_remove_conn_xrefs(drvdata);
> +       mutex_unlock(&ect_mutex);
> +
> +       coresight_unregister(drvdata->csdev);
> +
> +       return 0;
> +}
>
>  static int cti_probe(struct amba_device *adev, const struct amba_id *id)
>  {
> @@ -972,6 +983,7 @@ static const struct amba_id cti_ids[] = {
>         CS_AMBA_UCI_ID(0x000bb9ed, uci_id_cti), /* Coresight CTI (SoC 600) */
>         { 0, 0},
>  };
> +MODULE_DEVICE_TABLE(amba, cti_ids);
>
>  static struct amba_driver cti_driver = {
>         .drv = {
> @@ -980,6 +992,7 @@ static struct amba_driver cti_driver = {
>                 .suppress_bind_attrs = true,
>         },
>         .probe          = cti_probe,
> +       .remove         = cti_remove,
>         .id_table       = cti_ids,
>  };
>
> @@ -1002,3 +1015,7 @@ static void __exit cti_exit(void)
>
>  module_init(cti_init);
>  module_exit(cti_exit);
> +
> +MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight CTI Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
> index bfd44231d7ad..635d55c1d580 100644
> --- a/drivers/hwtracing/coresight/coresight-platform.c
> +++ b/drivers/hwtracing/coresight/coresight-platform.c
> @@ -75,6 +75,7 @@ coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode)
>         }
>         return csdev;
>  }
> +EXPORT_SYMBOL_GPL(coresight_find_csdev_by_fwnode);
>
>  #ifdef CONFIG_OF
>  static inline bool of_coresight_legacy_ep_is_input(struct device_node *ep)
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 78439b7cd8ba..3b4abdda1f72 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -289,6 +289,7 @@ void coresight_set_assoc_ectdev_mutex(struct coresight_device *csdev,
>         csdev->ect_dev = ect_csdev;
>         mutex_unlock(&coresight_mutex);
>  }
> +EXPORT_SYMBOL_GPL(coresight_set_assoc_ectdev_mutex);
>
>  static int coresight_enable_sink(struct coresight_device *csdev,
>                                  u32 mode, void *data)
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Tested by: Mike Leach <mike.leach@linaro.org>

--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 23/25] coresight: tmc-etr: add function to register catu ops

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> 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 1801804a7762..47696a7d24a7 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,
> @@ -582,4 +582,22 @@ 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 ad991a37e2d2..714f9e867e5f 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 6e8d2dc33d17..b91ec7dde7bc 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc.h
> +++ b/drivers/hwtracing/coresight/coresight-tmc.h
> @@ -326,4 +326,7 @@ 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
>

Reviewed by: Mike Leach <mike.leach@linaro.org>

--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 25/25] coresight: allow the coresight core driver to be built as a module

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> Enhance coresight developer's efficiency to debug coresight drivers.
> - Kconfig becomes a tristate, to allow =m
> - append -core to source file name to allow module to
>   be called coresight by the Makefile
> - modules can have only one init/exit, so we add the etm_perf
>   register/unregister function calls to the core init/exit
>   functions.
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Randy Dunlap <rdunlap@infradead.org>
> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Russell King <linux@armlinux.org.uk>
> Signed-off-by: Kim Phillips <kim.phillips@arm.com>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig           |  5 ++-
>  drivers/hwtracing/coresight/Makefile          |  5 ++-
>  .../{coresight.c => coresight-core.c}         | 42 ++++++++++++++-----
>  .../hwtracing/coresight/coresight-etm-perf.c  |  8 +++-
>  .../hwtracing/coresight/coresight-etm-perf.h  |  3 ++
>  5 files changed, 48 insertions(+), 15 deletions(-)
>  rename drivers/hwtracing/coresight/{coresight.c => coresight-core.c} (98%)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index dfe407cde262..c1198245461d 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -3,7 +3,7 @@
>  # Coresight configuration
>  #
>  menuconfig CORESIGHT
> -       bool "CoreSight Tracing Support"
> +       tristate "CoreSight Tracing Support"
>         depends on ARM || ARM64
>         depends on OF || ACPI
>         select ARM_AMBA
> @@ -15,6 +15,9 @@ menuconfig CORESIGHT
>           specification and configure the right series of components when a
>           trace source gets enabled.
>
> +         To compile this driver as a module, choose M here: the
> +         module will be called coresight.
> +
>  if CORESIGHT
>  config CORESIGHT_LINKS_AND_SINKS
>         tristate "CoreSight Link and Sink drivers"
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index 0359d5a1588f..1b35b55bd420 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -2,8 +2,9 @@
>  #
>  # Makefile for CoreSight drivers.
>  #
> -obj-$(CONFIG_CORESIGHT) += coresight.o coresight-etm-perf.o \
> -                          coresight-platform.o coresight-sysfs.o
> +obj-$(CONFIG_CORESIGHT) += coresight.o
> +coresight-y := coresight-core.o  coresight-etm-perf.o coresight-platform.o \
> +               coresight-sysfs.o
>  obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o
>  coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \
>                       coresight-tmc-etr.o
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight-core.c
> similarity index 98%
> rename from drivers/hwtracing/coresight/coresight.c
> rename to drivers/hwtracing/coresight/coresight-core.c
> index 3b4abdda1f72..5cd200031613 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight-core.c
> @@ -1444,16 +1444,6 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value)
>  }
>  EXPORT_SYMBOL_GPL(coresight_timeout);
>
> -struct bus_type coresight_bustype = {
> -       .name   = "coresight",
> -};
> -
> -static int __init coresight_init(void)
> -{
> -       return bus_register(&coresight_bustype);
> -}
> -postcore_initcall(coresight_init);
> -
>  /*
>   * coresight_release_platform_data: Release references to the devices connected
>   * to the output port of this device.
> @@ -1662,3 +1652,35 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict,
>         return name;
>  }
>  EXPORT_SYMBOL_GPL(coresight_alloc_device_name);
> +
> +struct bus_type coresight_bustype = {
> +       .name   = "coresight",
> +};
> +
> +static int __init coresight_init(void)
> +{
> +       int ret;
> +
> +       ret = bus_register(&coresight_bustype);
> +       if (ret)
> +               return ret;
> +
> +       ret = etm_perf_init();
> +       if (ret)
> +               bus_unregister(&coresight_bustype);
> +
> +       return ret;
> +}
> +
> +static void __exit coresight_exit(void)
> +{
> +       etm_perf_exit();
> +       bus_unregister(&coresight_bustype);
> +}
> +
> +module_init(coresight_init);
> +module_exit(coresight_exit);
> +
> +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
> +MODULE_DESCRIPTION("Arm CoreSight tracer driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
> index 3728c44e5763..668b3ff11576 100644
> --- a/drivers/hwtracing/coresight/coresight-etm-perf.c
> +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
> @@ -591,7 +591,7 @@ void etm_perf_del_symlink_sink(struct coresight_device *csdev)
>         csdev->ea = NULL;
>  }
>
> -static int __init etm_perf_init(void)
> +int __init etm_perf_init(void)
>  {
>         int ret;
>
> @@ -618,4 +618,8 @@ static int __init etm_perf_init(void)
>
>         return ret;
>  }
> -device_initcall(etm_perf_init);
> +
> +void __exit etm_perf_exit(void)
> +{
> +       perf_pmu_unregister(&etm_pmu);
> +}
> diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/drivers/hwtracing/coresight/coresight-etm-perf.h
> index 05f89723e282..3e4f2ad5e193 100644
> --- a/drivers/hwtracing/coresight/coresight-etm-perf.h
> +++ b/drivers/hwtracing/coresight/coresight-etm-perf.h
> @@ -82,4 +82,7 @@ static inline void *etm_perf_sink_config(struct perf_output_handle *handle)
>
>  #endif /* CONFIG_CORESIGHT */
>
> +int __init etm_perf_init(void);
> +void __exit etm_perf_exit(void);
> +
>  #endif
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

Tested by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 24/25] coresight: catu: allow catu drivers to be built as modules

[Mike Leach]

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> Allow to build coresight-catu as modules, for ease of development.
> - Kconfig becomes a tristate, to allow =m
> - add catu_remove functions, for module unload
> - add a MODULE_DEVICE_TABLE for autoloading on boot
>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/Kconfig          |  5 ++++-
>  drivers/hwtracing/coresight/coresight-catu.c | 15 +++++++++++++++
>  2 files changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index b04aae2ceecc..dfe407cde262 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -42,7 +42,7 @@ config CORESIGHT_LINK_AND_SINK_TMC
>           module will be called coresight-tmc.
>
>  config CORESIGHT_CATU
> -       bool "Coresight Address Translation Unit (CATU) driver"
> +       tristate "Coresight Address Translation Unit (CATU) driver"
>         depends on CORESIGHT_LINK_AND_SINK_TMC
>         help
>            Enable support for the Coresight Address Translation Unit (CATU).
> @@ -52,6 +52,9 @@ config CORESIGHT_CATU
>            by looking up the provided table. CATU can also be used in pass-through
>            mode where the address is not translated.
>
> +          To compile this driver as a module, choose M here: the
> +          module will be called coresight-catu.
> +
>  config CORESIGHT_SINK_TPIU
>         tristate "Coresight generic TPIU driver"
>         depends on CORESIGHT_LINKS_AND_SINKS
> diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
> index 47696a7d24a7..7428cbe67921 100644
> --- a/drivers/hwtracing/coresight/coresight-catu.c
> +++ b/drivers/hwtracing/coresight/coresight-catu.c
> @@ -567,11 +567,21 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
>         return ret;
>  }
>
> +static int __exit catu_remove(struct amba_device *adev)
> +{
> +       struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> +
> +       coresight_unregister(drvdata->csdev);
> +       return 0;
> +}
> +
>  static struct amba_id catu_ids[] = {
>         CS_AMBA_ID(0x000bb9ee),
>         {},
>  };
>
> +MODULE_DEVICE_TABLE(amba, catu_ids);
> +
>  static struct amba_driver catu_driver = {
>         .drv = {
>                 .name                   = "coresight-catu",
> @@ -579,6 +589,7 @@ static struct amba_driver catu_driver = {
>                 .suppress_bind_attrs    = true,
>         },
>         .probe                          = catu_probe,
> +       .remove                         = catu_remove,
>         .id_table                       = catu_ids,
>  };
>
> @@ -601,3 +612,7 @@ static void __exit catu_exit(void)
>
>  module_init(catu_init);
>  module_exit(catu_exit);
> +
> +MODULE_AUTHOR("Suzuki K Poulose <suzuki.poulose@arm.com>");
> +MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");

Name here should be the "CATU" not replicator

> +MODULE_LICENSE("GPL v2");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>

With the above change

Reviewed by: Mike Leach <mike.leach@linaro.org>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 20/25] coresight: cti: don't disable ect device if it's not enabled

[Mike Leach]

Hi Tingwei,

On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> If associated ect device is not enabled at first place, disable
> routine should not be called. Add ect_enabled flag to check whether
> ect device is enabled. Fix the issue in below case.  Ect device is
> not available when associated coresight device enabled and the
> association is established after coresight device is enabled.
>
> Signed-off-by: Mike Leach <mike.leach@linaro.org>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight.c | 11 ++++++++---
>  include/linux/coresight.h               |  1 +
>  2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 8b55383cfcf1..83a46cf37968 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -245,13 +245,18 @@ coresight_control_assoc_ectdev(struct coresight_device *csdev, bool enable)
>
>         if (!ect_csdev)
>                 return 0;
> +       if ((!ect_ops(ect_csdev)->enable) || (!ect_ops(ect_csdev)->disable))
> +               return 0;
>
>         if (enable) {
> -               if (ect_ops(ect_csdev)->enable)
> -                       ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> +               ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> +               if (ect_ret)

Should this be:-
if (!ect_ret)

However, this problem is corrected in the next patch - so the set as
tested overall works.

This needs fixing or it might be better to combine this patch and the
next patch into a single patch?
Both are required because the CTI can be loaded as a module. Both
adjust the same block of functionality.

Mathieu may have a view on the best solution option here.

Mike



> +                       csdev->ect_enabled = true;
>         } else {
> -               if (ect_ops(ect_csdev)->disable)
> +               if (csdev->ect_enabled) {
>                         ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
> +                       csdev->ect_enabled = false;
> +               }
>         }
>
>         /* output warning if ECT enable is preventing trace operation */
> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> index 3bb738f9a326..7d3c87e5b97c 100644
> --- a/include/linux/coresight.h
> +++ b/include/linux/coresight.h
> @@ -208,6 +208,7 @@ struct coresight_device {
>         /* sysfs links between components */
>         int nr_links;
>         bool has_conns_grp;
> +       bool ect_enabled; /* true only if associated ect device is enabled */
>  };
>
>  /*
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 21/25] coresight: cti: increase reference count when enabling cti

[Mike Leach]

Please see my comment from the previous patch regarding the function here.

Mike


On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
>
> CTI device is enabled when associated coresight device is enabled.
> Increase the module and device reference count for CTI device
> when it's enabled. This can prevent CTI device be removed or
> module be unloaded when CTI device is enabled by an active trace
> session.
>
> Signed-off-by: Mike Leach <mike.leach@linaro.org>
> Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> ---
>  drivers/hwtracing/coresight/coresight.c | 17 ++++++++++++++---
>  1 file changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index 83a46cf37968..78439b7cd8ba 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -242,19 +242,30 @@ coresight_control_assoc_ectdev(struct coresight_device *csdev, bool enable)
>  {
>         int ect_ret = 0;
>         struct coresight_device *ect_csdev = csdev->ect_dev;
> +       struct module *mod;
>
>         if (!ect_csdev)
>                 return 0;
>         if ((!ect_ops(ect_csdev)->enable) || (!ect_ops(ect_csdev)->disable))
>                 return 0;
>
> +       mod = ect_csdev->dev.parent->driver->owner;
>         if (enable) {
> -               ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> -               if (ect_ret)
> -                       csdev->ect_enabled = true;
> +               if (try_module_get(mod)) {
> +                       ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> +                       if (ect_ret) {
> +                               module_put(mod);
> +                       } else {
> +                               get_device(ect_csdev->dev.parent);
> +                               csdev->ect_enabled = true;
> +                       }
> +               } else
> +                       ect_ret = -ENODEV;
>         } else {
>                 if (csdev->ect_enabled) {
>                         ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
> +                       put_device(ect_csdev->dev.parent);
> +                       module_put(mod);
>                         csdev->ect_enabled = false;
>                 }
>         }
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>


--
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 20/25] coresight: cti: don't disable ect device if it's not enabled

[Tingwei Zhang]

Hi Mike,
On Tue, Aug 04, 2020 at 01:13:06AM +0800, Mike Leach wrote:
> Hi Tingwei,
> 
> On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
> >
> > If associated ect device is not enabled at first place, disable
> > routine should not be called. Add ect_enabled flag to check whether
> > ect device is enabled. Fix the issue in below case.  Ect device is
> > not available when associated coresight device enabled and the
> > association is established after coresight device is enabled.
> >
> > Signed-off-by: Mike Leach <mike.leach@linaro.org>
> > Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> > ---
> >  drivers/hwtracing/coresight/coresight.c | 11 ++++++++---
> >  include/linux/coresight.h               |  1 +
> >  2 files changed, 9 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/hwtracing/coresight/coresight.c 
> > b/drivers/hwtracing/coresight/coresight.c
> > index 8b55383cfcf1..83a46cf37968 100644
> > --- a/drivers/hwtracing/coresight/coresight.c
> > +++ b/drivers/hwtracing/coresight/coresight.c
> > @@ -245,13 +245,18 @@ coresight_control_assoc_ectdev(struct 
> > coresight_device *csdev, bool enable)
> >
> >         if (!ect_csdev)
> >                 return 0;
> > +       if ((!ect_ops(ect_csdev)->enable) || 
> > (!ect_ops(ect_csdev)->disable))
> > +               return 0;
> >
> >         if (enable) {
> > -               if (ect_ops(ect_csdev)->enable)
> > -                       ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> > +               ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> > +               if (ect_ret)
> 
> Should this be:-
> if (!ect_ret)
> 
> However, this problem is corrected in the next patch - so the set as
> tested overall works.

Thanks a lot for testing this series, Mike.

Sorry for this stupid mistake. I'll address it in v7.

> 
> This needs fixing or it might be better to combine this patch and the
> next patch into a single patch?
> Both are required because the CTI can be loaded as a module. Both
> adjust the same block of functionality.

I separate them into two since this patch adds ect_enabled flag and
next patch add module and device reference. Kind of two things in
my opinion. I'm open for discusion and merge them into one path.

Thanks,
Tingwei

> 
> Mathieu may have a view on the best solution option here.
> 
> Mike
> 
> 
> 
> > +                       csdev->ect_enabled = true;
> >         } else {
> > -               if (ect_ops(ect_csdev)->disable)
> > +               if (csdev->ect_enabled) {
> >                         ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
> > +                       csdev->ect_enabled = false;
> > +               }
> >         }
> >
> >         /* output warning if ECT enable is preventing trace operation */
> > diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> > index 3bb738f9a326..7d3c87e5b97c 100644
> > --- a/include/linux/coresight.h
> > +++ b/include/linux/coresight.h
> > @@ -208,6 +208,7 @@ struct coresight_device {
> >         /* sysfs links between components */
> >         int nr_links;
> >         bool has_conns_grp;
> > +       bool ect_enabled; /* true only if associated ect device is enabled 
> > */
> >  };
> >
> >  /*
> > --
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> > a Linux Foundation Collaborative Project
> >
> 
> 
> --
> Mike Leach
> Principal Engineer, ARM Ltd.
> Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 24/25] coresight: catu: allow catu drivers to be built as modules

[Tingwei Zhang]

Hi Mike,
On Tue, Aug 04, 2020 at 01:12:23AM +0800, Mike Leach wrote:
> On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
> >
> > Allow to build coresight-catu as modules, for ease of development.
> > - Kconfig becomes a tristate, to allow =m
> > - add catu_remove functions, for module unload
> > - add a MODULE_DEVICE_TABLE for autoloading on boot
> >
> > Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> > ---
> >  drivers/hwtracing/coresight/Kconfig          |  5 ++++-
> >  drivers/hwtracing/coresight/coresight-catu.c | 15 +++++++++++++++
> >  2 files changed, 19 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/hwtracing/coresight/Kconfig 
> > b/drivers/hwtracing/coresight/Kconfig
> > index b04aae2ceecc..dfe407cde262 100644
> > --- a/drivers/hwtracing/coresight/Kconfig
> > +++ b/drivers/hwtracing/coresight/Kconfig
> > @@ -42,7 +42,7 @@ config CORESIGHT_LINK_AND_SINK_TMC
> >           module will be called coresight-tmc.
> >
> >  config CORESIGHT_CATU
> > -       bool "Coresight Address Translation Unit (CATU) driver"
> > +       tristate "Coresight Address Translation Unit (CATU) driver"
> >         depends on CORESIGHT_LINK_AND_SINK_TMC
> >         help
> >            Enable support for the Coresight Address Translation Unit 
> > (CATU).
> > @@ -52,6 +52,9 @@ config CORESIGHT_CATU
> >            by looking up the provided table. CATU can also be used in 
> > pass-through
> >            mode where the address is not translated.
> >
> > +          To compile this driver as a module, choose M here: the
> > +          module will be called coresight-catu.
> > +
> >  config CORESIGHT_SINK_TPIU
> >         tristate "Coresight generic TPIU driver"
> >         depends on CORESIGHT_LINKS_AND_SINKS
> > diff --git a/drivers/hwtracing/coresight/coresight-catu.c 
> > b/drivers/hwtracing/coresight/coresight-catu.c
> > index 47696a7d24a7..7428cbe67921 100644
> > --- a/drivers/hwtracing/coresight/coresight-catu.c
> > +++ b/drivers/hwtracing/coresight/coresight-catu.c
> > @@ -567,11 +567,21 @@ static int catu_probe(struct amba_device *adev, 
> > const struct amba_id *id)
> >         return ret;
> >  }
> >
> > +static int __exit catu_remove(struct amba_device *adev)
> > +{
> > +       struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
> > +
> > +       coresight_unregister(drvdata->csdev);
> > +       return 0;
> > +}
> > +
> >  static struct amba_id catu_ids[] = {
> >         CS_AMBA_ID(0x000bb9ee),
> >         {},
> >  };
> >
> > +MODULE_DEVICE_TABLE(amba, catu_ids);
> > +
> >  static struct amba_driver catu_driver = {
> >         .drv = {
> >                 .name                   = "coresight-catu",
> > @@ -579,6 +589,7 @@ static struct amba_driver catu_driver = {
> >                 .suppress_bind_attrs    = true,
> >         },
> >         .probe                          = catu_probe,
> > +       .remove                         = catu_remove,
> >         .id_table                       = catu_ids,
> >  };
> >
> > @@ -601,3 +612,7 @@ static void __exit catu_exit(void)
> >
> >  module_init(catu_init);
> >  module_exit(catu_exit);
> > +
> > +MODULE_AUTHOR("Suzuki K Poulose <suzuki.poulose@arm.com>");
> > +MODULE_DESCRIPTION("Arm CoreSight Replicator Driver");
> 
> Name here should be the "CATU" not replicator
>
I'll address it in v7.

Thanks,
Tingwei 
> > +MODULE_LICENSE("GPL v2");
> > --
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> > a Linux Foundation Collaborative Project
> >
> 
> With the above change
> 
> Reviewed by: Mike Leach <mike.leach@linaro.org>
> 
> 
> --
> Mike Leach
> Principal Engineer, ARM Ltd.
> Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v6 20/25] coresight: cti: don't disable ect device if it's not enabled

[Mike Leach]

Hi Tingwei,

On Tue, 4 Aug 2020 at 01:22, Tingwei Zhang <tingweiz@codeaurora.org> wrote:
>
> Hi Mike,
> On Tue, Aug 04, 2020 at 01:13:06AM +0800, Mike Leach wrote:
> > Hi Tingwei,
> >
> > On Fri, 31 Jul 2020 at 07:42, Tingwei Zhang <tingwei@codeaurora.org> wrote:
> > >
> > > If associated ect device is not enabled at first place, disable
> > > routine should not be called. Add ect_enabled flag to check whether
> > > ect device is enabled. Fix the issue in below case.  Ect device is
> > > not available when associated coresight device enabled and the
> > > association is established after coresight device is enabled.
> > >
> > > Signed-off-by: Mike Leach <mike.leach@linaro.org>
> > > Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
> > > ---
> > >  drivers/hwtracing/coresight/coresight.c | 11 ++++++++---
> > >  include/linux/coresight.h               |  1 +
> > >  2 files changed, 9 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/drivers/hwtracing/coresight/coresight.c
> > > b/drivers/hwtracing/coresight/coresight.c
> > > index 8b55383cfcf1..83a46cf37968 100644
> > > --- a/drivers/hwtracing/coresight/coresight.c
> > > +++ b/drivers/hwtracing/coresight/coresight.c
> > > @@ -245,13 +245,18 @@ coresight_control_assoc_ectdev(struct
> > > coresight_device *csdev, bool enable)
> > >
> > >         if (!ect_csdev)
> > >                 return 0;
> > > +       if ((!ect_ops(ect_csdev)->enable) ||
> > > (!ect_ops(ect_csdev)->disable))
> > > +               return 0;
> > >
> > >         if (enable) {
> > > -               if (ect_ops(ect_csdev)->enable)
> > > -                       ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> > > +               ect_ret = ect_ops(ect_csdev)->enable(ect_csdev);
> > > +               if (ect_ret)
> >
> > Should this be:-
> > if (!ect_ret)
> >
> > However, this problem is corrected in the next patch - so the set as
> > tested overall works.
>
> Thanks a lot for testing this series, Mike.
>
> Sorry for this stupid mistake. I'll address it in v7.
>
> >
> > This needs fixing or it might be better to combine this patch and the
> > next patch into a single patch?
> > Both are required because the CTI can be loaded as a module. Both
> > adjust the same block of functionality.
>
> I separate them into two since this patch adds ect_enabled flag and
> next patch add module and device reference. Kind of two things in
> my opinion. I'm open for discusion and merge them into one path.
>

I don't mind which solution is used.
I mention it because I have had objections in the past where two
patches in a set change the same piece of code.

Regards

Mike

> Thanks,
> Tingwei
>
> >
> > Mathieu may have a view on the best solution option here.
> >
> > Mike
> >
> >
> >
> > > +                       csdev->ect_enabled = true;
> > >         } else {
> > > -               if (ect_ops(ect_csdev)->disable)
> > > +               if (csdev->ect_enabled) {
> > >                         ect_ret = ect_ops(ect_csdev)->disable(ect_csdev);
> > > +                       csdev->ect_enabled = false;
> > > +               }
> > >         }
> > >
> > >         /* output warning if ECT enable is preventing trace operation */
> > > diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> > > index 3bb738f9a326..7d3c87e5b97c 100644
> > > --- a/include/linux/coresight.h
> > > +++ b/include/linux/coresight.h
> > > @@ -208,6 +208,7 @@ struct coresight_device {
> > >         /* sysfs links between components */
> > >         int nr_links;
> > >         bool has_conns_grp;
> > > +       bool ect_enabled; /* true only if associated ect device is enabled
> > > */
> > >  };
> > >
> > >  /*
> > > --
> > > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> > > a Linux Foundation Collaborative Project
> > >
> >
> >
> > --
> > Mike Leach
> > Principal Engineer, ARM Ltd.
> > Manchester Design Centre. UK



-- 
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel