coresight: Move all sysfs code to sysfs file

At the moment the core file contains both sysfs functionality and
core functionality, while the Perf mode is in a separate file in
coresight-etm-perf.c

Many of the functions have ambiguous names like
coresight_enable_source() which actually only work in relation to the
sysfs mode. To avoid further confusion, move everything that isn't core
functionality into the sysfs file and append  _sysfs to the ambiguous
functions.
Signed-off-by: James Clark <james.clark@arm.com>
Link: https://lore.kernel.org/r/20240129154050.569566-7-james.clark@arm.comSigned-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>

drivers/hwtracing/coresight/coresight-etm3x-core.c

@@ -714,7 +714,7 @@ static int etm_online_cpu(unsigned int cpu)
 		return 0;
 
 	if (etmdrvdata[cpu]->boot_enable && !etmdrvdata[cpu]->sticky_enable)
-		coresight_enable(etmdrvdata[cpu]->csdev);
+		coresight_enable_sysfs(etmdrvdata[cpu]->csdev);
 	return 0;
 }
 
@@ -924,7 +924,7 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
 	dev_info(&drvdata->csdev->dev,
 		 "%s initialized\n", (char *)coresight_get_uci_data(id));
 	if (boot_enable) {
-		coresight_enable(drvdata->csdev);
+		coresight_enable_sysfs(drvdata->csdev);
 		drvdata->boot_enable = true;
 	}
 

drivers/hwtracing/coresight/coresight-etm4x-core.c

@@ -1648,7 +1648,7 @@ static int etm4_online_cpu(unsigned int cpu)
 		return etm4_probe_cpu(cpu);
 
 	if (etmdrvdata[cpu]->boot_enable && !etmdrvdata[cpu]->sticky_enable)
-		coresight_enable(etmdrvdata[cpu]->csdev);
+		coresight_enable_sysfs(etmdrvdata[cpu]->csdev);
 	return 0;
 }
 
@@ -2096,7 +2096,7 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg)
 		 drvdata->cpu, type_name, major, minor);
 
 	if (boot_enable) {
-		coresight_enable(drvdata->csdev);
+		coresight_enable_sysfs(drvdata->csdev);
 		drvdata->boot_enable = true;
 	}
 

drivers/hwtracing/coresight/coresight-priv.h

@@ -12,6 +12,9 @@
 #include <linux/coresight.h>
 #include <linux/pm_runtime.h>
 
+extern struct mutex coresight_mutex;
+extern struct device_type coresight_dev_type[];
+
 /*
  * Coresight management registers (0xf00-0xfcc)
  * 0xfa0 - 0xfa4: Management	registers in PFTv1.0
@@ -229,8 +232,6 @@ void coresight_add_helper(struct coresight_device *csdev,
 
 void coresight_set_percpu_sink(int cpu, struct coresight_device *csdev);
 struct coresight_device *coresight_get_percpu_sink(int cpu);
-int coresight_enable_source(struct coresight_device *csdev, enum cs_mode mode,
-			    void *data);
 void coresight_disable_source(struct coresight_device *csdev, void *data);
 
 #endif

drivers/hwtracing/coresight/coresight-stm.c

@@ -332,7 +332,7 @@ static int stm_generic_link(struct stm_data *stm_data,
 	if (!drvdata || !drvdata->csdev)
 		return -EINVAL;
 
-	return coresight_enable(drvdata->csdev);
+	return coresight_enable_sysfs(drvdata->csdev);
 }
 
 static void stm_generic_unlink(struct stm_data *stm_data,
@@ -343,7 +343,7 @@ static void stm_generic_unlink(struct stm_data *stm_data,
 	if (!drvdata || !drvdata->csdev)
 		return;
 
-	coresight_disable(drvdata->csdev);
+	coresight_disable_sysfs(drvdata->csdev);
 }
 
 static phys_addr_t

include/linux/coresight.h

@@ -578,8 +578,8 @@ static inline bool coresight_is_percpu_sink(struct coresight_device *csdev)
 extern struct coresight_device *
 coresight_register(struct coresight_desc *desc);
 extern void coresight_unregister(struct coresight_device *csdev);
-extern int coresight_enable(struct coresight_device *csdev);
-extern void coresight_disable(struct coresight_device *csdev);
+extern int coresight_enable_sysfs(struct coresight_device *csdev);
+extern void coresight_disable_sysfs(struct coresight_device *csdev);
 extern int coresight_timeout(struct csdev_access *csa, u32 offset,
 			     int position, int value);
 
@@ -609,8 +609,8 @@ static inline struct coresight_device *
 coresight_register(struct coresight_desc *desc) { return NULL; }
 static inline void coresight_unregister(struct coresight_device *csdev) {}
 static inline int
-coresight_enable(struct coresight_device *csdev) { return -ENOSYS; }
-static inline void coresight_disable(struct coresight_device *csdev) {}
+coresight_enable_sysfs(struct coresight_device *csdev) { return -ENOSYS; }
+static inline void coresight_disable_sysfs(struct coresight_device *csdev) {}
 
 static inline int coresight_timeout(struct csdev_access *csa, u32 offset,
 				    int position, int value)