/**
* Copyright (C) ARM Limited 2010-2014. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "gator.h"
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/math64.h>
#ifdef MALI_SUPPORT
#ifdef MALI_DIR_MIDGARD
/* New DDK Directory structure with kernel/drivers/gpu/arm/midgard*/
#include "mali_linux_trace.h"
#else
/* Old DDK Directory structure with kernel/drivers/gpu/arm/t6xx*/
#include "linux/mali_linux_trace.h"
#endif
#endif
/*
* Taken from MALI_PROFILING_EVENT_TYPE_* items in Mali DDK.
*/
#define EVENT_TYPE_SINGLE 0
#define EVENT_TYPE_START 1
#define EVENT_TYPE_STOP 2
#define EVENT_TYPE_SUSPEND 3
#define EVENT_TYPE_RESUME 4
/* Note whether tracepoints have been registered */
static int mali_timeline_trace_registered;
static int mali_job_slots_trace_registered;
enum {
GPU_UNIT_NONE = 0,
GPU_UNIT_VP,
GPU_UNIT_FP,
GPU_UNIT_CL,
NUMBER_OF_GPU_UNITS
};
#if defined(MALI_SUPPORT)
struct mali_activity {
int core;
int key;
int count;
int last_activity;
int last_pid;
};
#define NUMBER_OF_GPU_CORES 16
static struct mali_activity mali_activities[NUMBER_OF_GPU_UNITS*NUMBER_OF_GPU_CORES];
static DEFINE_SPINLOCK(mali_activities_lock);
/* Only one event should be running on a unit and core at a time (ie, a start
* event can only be followed by a stop and vice versa), but because the kernel
* only knows when a job is enqueued and not started, it is possible for a
* start1, start2, stop1, stop2. Change it back into start1, stop1, start2,
* stop2 by queueing up start2 and releasing it when stop1 is received.
*/
static int mali_activity_index(int core, int key)
{
int i;
for (i = 0; i < ARRAY_SIZE(mali_activities); ++i) {
if ((mali_activities[i].core == core) && (mali_activities[i].key == key)) {
break;
}
if ((mali_activities[i].core == 0) && (mali_activities[i].key == 0)) {
mali_activities[i].core = core;
mali_activities[i].key = key;
break;
}
}
BUG_ON(i >= ARRAY_SIZE(mali_activities));
return i;
}
static void mali_activity_enqueue(int core, int key, int activity, int pid)
{
int i;
int count;
spin_lock(&mali_activities_lock);
i = mali_activity_index(core, key);
count = mali_activities[i].count;
BUG_ON(count < 0);
++mali_activities[i].count;
if (count) {
mali_activities[i].last_activity = activity;
mali_activities[i].last_pid = pid;
}
spin_unlock(&mali_activities_lock);
if (!count) {
gator_marshal_activity_switch(core, key, activity, pid);
}
}
static void mali_activity_stop(int core, int key)
{
int i;
int count;
int last_activity = 0;
int last_pid = 0;
spin_lock(&mali_activities_lock);
i = mali_activity_index(core, key);
if (mali_activities[i].count == 0) {
spin_unlock(&mali_activities_lock);
return;
}
--mali_activities[i].count;
count = mali_activities[i].count;
if (count) {
last_activity = mali_activities[i].last_activity;
last_pid = mali_activities[i].last_pid;
}
spin_unlock(&mali_activities_lock);
gator_marshal_activity_switch(core, key, 0, 0);
if (count) {
gator_marshal_activity_switch(core, key, last_activity, last_pid);
}
}
void mali_activity_clear(mali_counter mali_activity[], size_t mali_activity_size)
{
int activity;
int cores;
int core;
for (activity = 0; activity < mali_activity_size; ++activity) {
cores = mali_activity[activity].cores;
if (cores < 0) {
cores = 1;
}
for (core = 0; core < cores; ++core) {
if (mali_activity[activity].enabled) {
gator_marshal_activity_switch(core, mali_activity[activity].key, 0, 0);
}
}
}
}
#endif
#if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_T6xx)
#include "gator_events_mali_4xx.h"
/*
* Taken from MALI_PROFILING_EVENT_CHANNEL_* in Mali DDK.
*/
enum {
EVENT_CHANNEL_SOFTWARE = 0,
EVENT_CHANNEL_VP0 = 1,
EVENT_CHANNEL_FP0 = 5,
EVENT_CHANNEL_FP1,
EVENT_CHANNEL_FP2,
EVENT_CHANNEL_FP3,
EVENT_CHANNEL_FP4,
EVENT_CHANNEL_FP5,
EVENT_CHANNEL_FP6,
EVENT_CHANNEL_FP7,
EVENT_CHANNEL_GPU = 21
};
/**
* These events are applicable when the type MALI_PROFILING_EVENT_TYPE_SINGLE is used from the GPU channel
*/
enum {
EVENT_REASON_SINGLE_GPU_NONE = 0,
EVENT_REASON_SINGLE_GPU_FREQ_VOLT_CHANGE = 1,
};
mali_counter mali_activity[2];
GATOR_DEFINE_PROBE(mali_timeline_event, TP_PROTO(unsigned int event_id, unsigned int d0, unsigned int d1, unsigned int d2, unsigned int d3, unsigned int d4))
{
unsigned int component, state;
// do as much work as possible before disabling interrupts
component = (event_id >> 16) & 0xFF; // component is an 8-bit field
state = (event_id >> 24) & 0xF; // state is a 4-bit field
switch (state) {
case EVENT_TYPE_START:
if (component == EVENT_CHANNEL_VP0) {
/* tgid = d0; pid = d1; */
if (mali_activity[1].enabled) {
mali_activity_enqueue(0, mali_activity[1].key, 1, d1);
}
} else if (component >= EVENT_CHANNEL_FP0 && component <= EVENT_CHANNEL_FP7) {
/* tgid = d0; pid = d1; */
if (mali_activity[0].enabled) {
mali_activity_enqueue(component - EVENT_CHANNEL_FP0, mali_activity[0].key, 1, d1);
}
}
break;
case EVENT_TYPE_STOP:
if (component == EVENT_CHANNEL_VP0) {
if (mali_activity[1].enabled) {
mali_activity_stop(0, mali_activity[1].key);
}
} else if (component >= EVENT_CHANNEL_FP0 && component <= EVENT_CHANNEL_FP7) {
if (mali_activity[0].enabled) {
mali_activity_stop(component - EVENT_CHANNEL_FP0, mali_activity[0].key);
}
}
break;
case EVENT_TYPE_SINGLE:
if (component == EVENT_CHANNEL_GPU) {
unsigned int reason = (event_id & 0xffff);
if (reason == EVENT_REASON_SINGLE_GPU_FREQ_VOLT_CHANGE) {
gator_events_mali_log_dvfs_event(d0, d1);
}
}
break;
default:
break;
}
}
#endif
#if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_T6xx)
mali_counter mali_activity[3];
#if defined(MALI_JOB_SLOTS_EVENT_CHANGED)
GATOR_DEFINE_PROBE(mali_job_slots_event, TP_PROTO(unsigned int event_id, unsigned int tgid, unsigned int pid, unsigned char job_id))
#else
GATOR_DEFINE_PROBE(mali_job_slots_event, TP_PROTO(unsigned int event_id, unsigned int tgid, unsigned int pid))
#endif
{
unsigned int component, state, unit;
#if !defined(MALI_JOB_SLOTS_EVENT_CHANGED)
unsigned char job_id = 0;
#endif
component = (event_id >> 16) & 0xFF; // component is an 8-bit field
state = (event_id >> 24) & 0xF; // state is a 4-bit field
switch (component) {
case 0:
unit = GPU_UNIT_FP;
break;
case 1:
unit = GPU_UNIT_VP;
break;
case 2:
unit = GPU_UNIT_CL;
break;
default:
unit = GPU_UNIT_NONE;
}
if (unit != GPU_UNIT_NONE) {
switch (state) {
case EVENT_TYPE_START:
if (mali_activity[component].enabled) {
mali_activity_enqueue(0, mali_activity[component].key, 1, (pid != 0 ? pid : tgid));
}
break;
case EVENT_TYPE_STOP:
default: // Some jobs can be soft-stopped, so ensure that this terminates the activity trace.
if (mali_activity[component].enabled) {
mali_activity_stop(0, mali_activity[component].key);
}
break;
}
}
}
#endif
static int gator_trace_gpu_start(void)
{
/*
* Returns nonzero for installation failed
* Absence of gpu trace points is not an error
*/
#if defined(MALI_SUPPORT)
memset(&mali_activities, 0, sizeof(mali_activities));
#endif
mali_timeline_trace_registered = mali_job_slots_trace_registered = 0;
#if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_T6xx)
mali_activity_clear(mali_activity, ARRAY_SIZE(mali_activity));
if (!GATOR_REGISTER_TRACE(mali_timeline_event)) {
mali_timeline_trace_registered = 1;
}
#endif
#if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_T6xx)
mali_activity_clear(mali_activity, ARRAY_SIZE(mali_activity));
if (!GATOR_REGISTER_TRACE(mali_job_slots_event)) {
mali_job_slots_trace_registered = 1;
}
#endif
return 0;
}
static void gator_trace_gpu_stop(void)
{
#if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_T6xx)
if (mali_timeline_trace_registered) {
GATOR_UNREGISTER_TRACE(mali_timeline_event);
}
#endif
#if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_T6xx)
if (mali_job_slots_trace_registered) {
GATOR_UNREGISTER_TRACE(mali_job_slots_event);
}
#endif
mali_timeline_trace_registered = mali_job_slots_trace_registered = 0;
}
