oprofile: make new cpu buffer functions part of the api

This patch creates the new functions

 oprofile_write_reserve()
 oprofile_add_data()
 oprofile_write_commit()

and makes them part of the oprofile api.
Signed-off-by: Robert Richter <robert.richter@amd.com>

arch/x86/oprofile/op_model_amd.c

@@ -22,7 +22,6 @@
 
 #include "op_x86_model.h"
 #include "op_counter.h"
-#include "../../../drivers/oprofile/cpu_buffer.h"
 
 #define NUM_COUNTERS 4
 #define NUM_CONTROLS 4
@@ -61,14 +60,6 @@ static unsigned long reset_value[NUM_COUNTERS];
 #define IBS_OP_LOW_VALID_BIT		(1ULL<<18)	/* bit 18 */
 #define IBS_OP_LOW_ENABLE		(1ULL<<17)	/* bit 17 */
 
-/*
- * The function interface needs to be fixed, something like add
- * data. Should then be added to linux/oprofile.h.
- */
-extern
-void oprofile_add_data(struct op_entry *entry, struct pt_regs * const regs,
-		       unsigned long pc, int code, int size);
-
 #define IBS_FETCH_SIZE	6
 #define IBS_OP_SIZE	12
 
@@ -174,16 +165,16 @@ op_amd_handle_ibs(struct pt_regs * const regs,
 		rdmsr(MSR_AMD64_IBSFETCHCTL, low, high);
 		if (high & IBS_FETCH_HIGH_VALID_BIT) {
 			rdmsrl(MSR_AMD64_IBSFETCHLINAD, msr);
-			oprofile_add_data(&entry, regs, msr, IBS_FETCH_CODE,
-					  IBS_FETCH_SIZE);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
-			op_cpu_buffer_add_data(&entry, low);
-			op_cpu_buffer_add_data(&entry, high);
+			oprofile_write_reserve(&entry, regs, msr,
+					       IBS_FETCH_CODE, IBS_FETCH_SIZE);
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
+			oprofile_add_data(&entry, low);
+			oprofile_add_data(&entry, high);
 			rdmsrl(MSR_AMD64_IBSFETCHPHYSAD, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
-			op_cpu_buffer_write_commit(&entry);
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
+			oprofile_write_commit(&entry);
 
 			/* reenable the IRQ */
 			high &= ~IBS_FETCH_HIGH_VALID_BIT;
@@ -197,26 +188,26 @@ op_amd_handle_ibs(struct pt_regs * const regs,
 		rdmsr(MSR_AMD64_IBSOPCTL, low, high);
 		if (low & IBS_OP_LOW_VALID_BIT) {
 			rdmsrl(MSR_AMD64_IBSOPRIP, msr);
-			oprofile_add_data(&entry, regs, msr, IBS_OP_CODE,
-					  IBS_OP_SIZE);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
+			oprofile_write_reserve(&entry, regs, msr,
+					       IBS_OP_CODE, IBS_OP_SIZE);
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
 			rdmsrl(MSR_AMD64_IBSOPDATA, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
 			rdmsrl(MSR_AMD64_IBSOPDATA2, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
 			rdmsrl(MSR_AMD64_IBSOPDATA3, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
 			rdmsrl(MSR_AMD64_IBSDCLINAD, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
 			rdmsrl(MSR_AMD64_IBSDCPHYSAD, msr);
-			op_cpu_buffer_add_data(&entry, (u32)msr);
-			op_cpu_buffer_add_data(&entry, (u32)(msr >> 32));
-			op_cpu_buffer_write_commit(&entry);
+			oprofile_add_data(&entry, (u32)msr);
+			oprofile_add_data(&entry, (u32)(msr >> 32));
+			oprofile_write_commit(&entry);
 
 			/* reenable the IRQ */
 			high = 0;

drivers/oprofile/cpu_buffer.c

@@ -364,10 +364,11 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
 /*
  * Add samples with data to the ring buffer.
  *
- * Use op_cpu_buffer_add_data(&entry, val) to add data and
- * op_cpu_buffer_write_commit(&entry) to commit the sample.
+ * Use oprofile_add_data(&entry, val) to add data and
+ * oprofile_write_commit(&entry) to commit the sample.
  */
-void oprofile_add_data(struct op_entry *entry, struct pt_regs * const regs,
+void
+oprofile_write_reserve(struct op_entry *entry, struct pt_regs * const regs,
 		       unsigned long pc, int code, int size)
 {
 	struct op_sample *sample;
@@ -395,6 +396,16 @@ void oprofile_add_data(struct op_entry *entry, struct pt_regs * const regs,
 	cpu_buf->sample_lost_overflow++;
 }
 
+int oprofile_add_data(struct op_entry *entry, unsigned long val)
+{
+	return op_cpu_buffer_add_data(entry, val);
+}
+
+int oprofile_write_commit(struct op_entry *entry)
+{
+	return op_cpu_buffer_write_commit(entry);
+}
+
 void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
 {
 	struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);

drivers/oprofile/cpu_buffer.h

@@ -35,13 +35,7 @@ struct op_sample {
 	unsigned long data[0];
 };
 
-struct op_entry {
-	struct ring_buffer_event *event;
-	struct op_sample *sample;
-	unsigned long irq_flags;
-	unsigned long size;
-	unsigned long *data;
-};
+struct op_entry;
 
 struct oprofile_cpu_buffer {
 	unsigned long buffer_size;

include/linux/oprofile.h

@@ -164,4 +164,22 @@ void oprofile_put_buff(unsigned long *buf, unsigned int start,
 unsigned long oprofile_get_cpu_buffer_size(void);
 void oprofile_cpu_buffer_inc_smpl_lost(void);
  
+/* cpu buffer functions */
+
+struct op_sample;
+
+struct op_entry {
+	struct ring_buffer_event *event;
+	struct op_sample *sample;
+	unsigned long irq_flags;
+	unsigned long size;
+	unsigned long *data;
+};
+
+void oprofile_write_reserve(struct op_entry *entry,
+			    struct pt_regs * const regs,
+			    unsigned long pc, int code, int size);
+int oprofile_add_data(struct op_entry *entry, unsigned long val);
+int oprofile_write_commit(struct op_entry *entry);
+
 #endif /* OPROFILE_H */