drivers/gator/gator_trace_gpu.c

   1 /**
   2  * Copyright (C) ARM Limited 2010-2014. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include "gator.h"
  10
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/time.h>
  14 #include <linux/math64.h>
  15
  16 #ifdef MALI_SUPPORT
  17 #ifdef MALI_DIR_MIDGARD
  18 /* New DDK Directory structure with kernel/drivers/gpu/arm/midgard*/
  19 #include "mali_linux_trace.h"
  20 #else
  21 /* Old DDK Directory structure with kernel/drivers/gpu/arm/t6xx*/
  22 #include "linux/mali_linux_trace.h"
  23 #endif
  24 #endif
  25
  26 /*
  27  * Taken from MALI_PROFILING_EVENT_TYPE_* items in Mali DDK.
  28  */
  29 #define EVENT_TYPE_SINGLE  0
  30 #define EVENT_TYPE_START   1
  31 #define EVENT_TYPE_STOP    2
  32 #define EVENT_TYPE_SUSPEND 3
  33 #define EVENT_TYPE_RESUME  4
  34
  35 /* Note whether tracepoints have been registered */
  36 static int mali_timeline_trace_registered;
  37 static int mali_job_slots_trace_registered;
  38
  39 enum {
  40         GPU_UNIT_NONE = 0,
  41         GPU_UNIT_VP,
  42         GPU_UNIT_FP,
  43         GPU_UNIT_CL,
  44         NUMBER_OF_GPU_UNITS
  45 };
  46
  47 #if defined(MALI_SUPPORT)
  48
  49 struct mali_activity {
  50         int core;
  51         int key;
  52         int count;
  53         int last_activity;
  54         int last_pid;
  55 };
  56
  57 #define NUMBER_OF_GPU_CORES 16
  58 static struct mali_activity mali_activities[NUMBER_OF_GPU_UNITS*NUMBER_OF_GPU_CORES];
  59 static DEFINE_SPINLOCK(mali_activities_lock);
  60
  61 /* Only one event should be running on a unit and core at a time (ie,
  62  * a start event can only be followed by a stop and vice versa), but
  63  * because the kernel only knows when a job is enqueued and not
  64  * started, it is possible for a start1, start2, stop1, stop2. Change
  65  * it back into start1, stop1, start2, stop2 by queueing up start2 and
  66  * releasing it when stop1 is received.
  67  */
  68
  69 static int mali_activity_index(int core, int key)
  70 {
  71         int i;
  72
  73         for (i = 0; i < ARRAY_SIZE(mali_activities); ++i) {
  74                 if ((mali_activities[i].core == core) && (mali_activities[i].key == key))
  75                         break;
  76                 if ((mali_activities[i].core == 0) && (mali_activities[i].key == 0)) {
  77                         mali_activities[i].core = core;
  78                         mali_activities[i].key = key;
  79                         break;
  80                 }
  81         }
  82         BUG_ON(i >= ARRAY_SIZE(mali_activities));
  83
  84         return i;
  85 }
  86
  87 static void mali_activity_enqueue(int core, int key, int activity, int pid)
  88 {
  89         int i;
  90         int count;
  91
  92         spin_lock(&mali_activities_lock);
  93         i = mali_activity_index(core, key);
  94
  95         count = mali_activities[i].count;
  96         BUG_ON(count < 0);
  97         ++mali_activities[i].count;
  98         if (count) {
  99                 mali_activities[i].last_activity = activity;
 100                 mali_activities[i].last_pid = pid;
 101         }
 102         spin_unlock(&mali_activities_lock);
 103
 104         if (!count)
 105                 gator_marshal_activity_switch(core, key, activity, pid);
 106 }
 107
 108 static void mali_activity_stop(int core, int key)
 109 {
 110         int i;
 111         int count;
 112         int last_activity = 0;
 113         int last_pid = 0;
 114
 115         spin_lock(&mali_activities_lock);
 116         i = mali_activity_index(core, key);
 117
 118         if (mali_activities[i].count == 0) {
 119                 spin_unlock(&mali_activities_lock);
 120                 return;
 121         }
 122         --mali_activities[i].count;
 123         count = mali_activities[i].count;
 124         if (count) {
 125                 last_activity = mali_activities[i].last_activity;
 126                 last_pid = mali_activities[i].last_pid;
 127         }
 128         spin_unlock(&mali_activities_lock);
 129
 130         gator_marshal_activity_switch(core, key, 0, 0);
 131         if (count)
 132                 gator_marshal_activity_switch(core, key, last_activity, last_pid);
 133 }
 134
 135 void mali_activity_clear(struct mali_counter mali_activity[], size_t mali_activity_size)
 136 {
 137         int activity;
 138         int cores;
 139         int core;
 140
 141         for (activity = 0; activity < mali_activity_size; ++activity) {
 142                 cores = mali_activity[activity].cores;
 143                 if (cores < 0)
 144                         cores = 1;
 145                 for (core = 0; core < cores; ++core) {
 146                         if (mali_activity[activity].enabled) {
 147                                 preempt_disable();
 148                                 gator_marshal_activity_switch(core, mali_activity[activity].key, 0, 0);
 149                                 preempt_enable();
 150                         }
 151                 }
 152         }
 153 }
 154
 155 #endif
 156
 157 #if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_MIDGARD)
 158 #include "gator_events_mali_4xx.h"
 159
 160 /*
 161  * Taken from MALI_PROFILING_EVENT_CHANNEL_* in Mali DDK.
 162  */
 163 enum {
 164         EVENT_CHANNEL_SOFTWARE = 0,
 165         EVENT_CHANNEL_VP0 = 1,
 166         EVENT_CHANNEL_FP0 = 5,
 167         EVENT_CHANNEL_FP1,
 168         EVENT_CHANNEL_FP2,
 169         EVENT_CHANNEL_FP3,
 170         EVENT_CHANNEL_FP4,
 171         EVENT_CHANNEL_FP5,
 172         EVENT_CHANNEL_FP6,
 173         EVENT_CHANNEL_FP7,
 174         EVENT_CHANNEL_GPU = 21
 175 };
 176
 177 /**
 178  * These events are applicable when the type MALI_PROFILING_EVENT_TYPE_SINGLE is used from the GPU channel
 179  */
 180 enum {
 181         EVENT_REASON_SINGLE_GPU_NONE = 0,
 182         EVENT_REASON_SINGLE_GPU_FREQ_VOLT_CHANGE = 1,
 183 };
 184
 185 struct mali_counter mali_activity[2];
 186
 187 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))
 188 {
 189         unsigned int component, state;
 190
 191         /* do as much work as possible before disabling interrupts */
 192         component = (event_id >> 16) & 0xFF;    /* component is an 8-bit field */
 193         state = (event_id >> 24) & 0xF; /* state is a 4-bit field */
 194
 195         switch (state) {
 196         case EVENT_TYPE_START:
 197                 if (component == EVENT_CHANNEL_VP0) {
 198                         /* tgid = d0; pid = d1; */
 199                         if (mali_activity[1].enabled)
 200                                 mali_activity_enqueue(0, mali_activity[1].key, 1, d1);
 201                 } else if (component >= EVENT_CHANNEL_FP0 && component <= EVENT_CHANNEL_FP7) {
 202                         /* tgid = d0; pid = d1; */
 203                         if (mali_activity[0].enabled)
 204                                 mali_activity_enqueue(component - EVENT_CHANNEL_FP0, mali_activity[0].key, 1, d1);
 205                 }
 206                 break;
 207
 208         case EVENT_TYPE_STOP:
 209                 if (component == EVENT_CHANNEL_VP0) {
 210                         if (mali_activity[1].enabled)
 211                                 mali_activity_stop(0, mali_activity[1].key);
 212                 } else if (component >= EVENT_CHANNEL_FP0 && component <= EVENT_CHANNEL_FP7) {
 213                         if (mali_activity[0].enabled)
 214                                 mali_activity_stop(component - EVENT_CHANNEL_FP0, mali_activity[0].key);
 215                 }
 216                 break;
 217
 218         case EVENT_TYPE_SINGLE:
 219                 if (component == EVENT_CHANNEL_GPU) {
 220                         unsigned int reason = (event_id & 0xffff);
 221
 222                         if (reason == EVENT_REASON_SINGLE_GPU_FREQ_VOLT_CHANGE)
 223                                 gator_events_mali_log_dvfs_event(d0, d1);
 224                 }
 225                 break;
 226
 227         default:
 228                 break;
 229         }
 230 }
 231 #endif
 232
 233 #if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_MIDGARD)
 234
 235 struct mali_counter mali_activity[3];
 236
 237 #if defined(MALI_JOB_SLOTS_EVENT_CHANGED)
 238 GATOR_DEFINE_PROBE(mali_job_slots_event, TP_PROTO(unsigned int event_id, unsigned int tgid, unsigned int pid, unsigned char job_id))
 239 #else
 240 GATOR_DEFINE_PROBE(mali_job_slots_event, TP_PROTO(unsigned int event_id, unsigned int tgid, unsigned int pid))
 241 #endif
 242 {
 243         unsigned int component, state, unit;
 244 #if !defined(MALI_JOB_SLOTS_EVENT_CHANGED)
 245         unsigned char job_id = 0;
 246 #endif
 247
 248         component = (event_id >> 16) & 0xFF;    /* component is an 8-bit field */
 249         state = (event_id >> 24) & 0xF; /* state is a 4-bit field */
 250
 251         switch (component) {
 252         case 0:
 253                 unit = GPU_UNIT_FP;
 254                 break;
 255         case 1:
 256                 unit = GPU_UNIT_VP;
 257                 break;
 258         case 2:
 259                 unit = GPU_UNIT_CL;
 260                 break;
 261         default:
 262                 unit = GPU_UNIT_NONE;
 263         }
 264
 265         if (unit != GPU_UNIT_NONE) {
 266                 switch (state) {
 267                 case EVENT_TYPE_START:
 268                         if (mali_activity[component].enabled)
 269                                 mali_activity_enqueue(0, mali_activity[component].key, 1, (pid != 0 ? pid : tgid));
 270                         break;
 271                 case EVENT_TYPE_STOP:
 272                 default: /* Some jobs can be soft-stopped, so ensure that this terminates the activity trace. */
 273                         if (mali_activity[component].enabled)
 274                                 mali_activity_stop(0, mali_activity[component].key);
 275                         break;
 276                 }
 277         }
 278 }
 279 #endif
 280
 281 static int gator_trace_gpu_start(void)
 282 {
 283         /*
 284          * Returns nonzero for installation failed
 285          * Absence of gpu trace points is not an error
 286          */
 287
 288 #if defined(MALI_SUPPORT)
 289         memset(&mali_activities, 0, sizeof(mali_activities));
 290 #endif
 291         mali_timeline_trace_registered = mali_job_slots_trace_registered = 0;
 292
 293 #if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_MIDGARD)
 294         mali_activity_clear(mali_activity, ARRAY_SIZE(mali_activity));
 295         if (!GATOR_REGISTER_TRACE(mali_timeline_event))
 296                 mali_timeline_trace_registered = 1;
 297 #endif
 298
 299 #if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_MIDGARD)
 300         mali_activity_clear(mali_activity, ARRAY_SIZE(mali_activity));
 301         if (!GATOR_REGISTER_TRACE(mali_job_slots_event))
 302                 mali_job_slots_trace_registered = 1;
 303 #endif
 304
 305         return 0;
 306 }
 307
 308 static void gator_trace_gpu_stop(void)
 309 {
 310 #if defined(MALI_SUPPORT) && (MALI_SUPPORT != MALI_MIDGARD)
 311         if (mali_timeline_trace_registered)
 312                 GATOR_UNREGISTER_TRACE(mali_timeline_event);
 313 #endif
 314
 315 #if defined(MALI_SUPPORT) && (MALI_SUPPORT == MALI_MIDGARD)
 316         if (mali_job_slots_trace_registered)
 317                 GATOR_UNREGISTER_TRACE(mali_job_slots_event);
 318 #endif
 319
 320         mali_timeline_trace_registered = mali_job_slots_trace_registered = 0;
 321 }