src/intel_batchbuffer.c

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   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
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  12  * the following conditions:
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <assert.h>
  31
  32 #include "intel_batchbuffer.h"
  33
  34 static void
  35 intel_batchbuffer_reset(struct intel_batchbuffer *batch)
  36 {
  37     struct intel_driver_data *intel = batch->intel;
  38     int batch_size = BATCH_SIZE;
  39
  40     assert(batch->flag == I915_EXEC_RENDER ||
  41            batch->flag == I915_EXEC_BLT ||
  42            batch->flag == I915_EXEC_BSD);
  43
  44     dri_bo_unreference(batch->buffer);
  45     batch->buffer = dri_bo_alloc(intel->bufmgr,
  46                                  "batch buffer",
  47                                  batch_size,
  48                                  0x1000);
  49     assert(batch->buffer);
  50     dri_bo_map(batch->buffer, 1);
  51     assert(batch->buffer->virtual);
  52     batch->map = batch->buffer->virtual;
  53     batch->size = batch_size;
  54     batch->ptr = batch->map;
  55     batch->atomic = 0;
  56 }
  57
  58 static unsigned int
  59 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  60 {
  61     return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  62 }
  63
  64
  65 struct intel_batchbuffer *
  66 intel_batchbuffer_new(struct intel_driver_data *intel, int flag)
  67 {
  68     struct intel_batchbuffer *batch = calloc(1, sizeof(*batch));
  69     assert(flag == I915_EXEC_RENDER ||
  70            flag == I915_EXEC_BSD ||
  71            flag == I915_EXEC_BLT);
  72
  73     batch->intel = intel;
  74     batch->flag = flag;
  75     batch->run = drm_intel_bo_mrb_exec;
  76     intel_batchbuffer_reset(batch);
  77
  78     return batch;
  79 }
  80
  81 void intel_batchbuffer_free(struct intel_batchbuffer *batch)
  82 {
  83     if (batch->map) {
  84         dri_bo_unmap(batch->buffer);
  85         batch->map = NULL;
  86     }
  87
  88     dri_bo_unreference(batch->buffer);
  89     free(batch);
  90 }
  91
  92 void
  93 intel_batchbuffer_flush(struct intel_batchbuffer *batch)
  94 {
  95     unsigned int used = batch->ptr - batch->map;
  96
  97     if (used == 0) {
  98         return;
  99     }
 100
 101     if ((used & 4) == 0) {
 102         *(unsigned int*)batch->ptr = 0;
 103         batch->ptr += 4;
 104     }
 105
 106     *(unsigned int*)batch->ptr = MI_BATCH_BUFFER_END;
 107     batch->ptr += 4;
 108     dri_bo_unmap(batch->buffer);
 109     used = batch->ptr - batch->map;
 110     batch->run(batch->buffer, used, 0, 0, 0, batch->flag);
 111     intel_batchbuffer_reset(batch);
 112 }
 113
 114 void
 115 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, unsigned int x)
 116 {
 117     assert(intel_batchbuffer_space(batch) >= 4);
 118     *(unsigned int *)batch->ptr = x;
 119     batch->ptr += 4;
 120 }
 121
 122 void
 123 intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch, dri_bo *bo,
 124                                 uint32_t read_domains, uint32_t write_domains,
 125                                 uint32_t delta)
 126 {
 127     assert(batch->ptr - batch->map < batch->size);
 128     dri_bo_emit_reloc(batch->buffer, read_domains, write_domains,
 129                       delta, batch->ptr - batch->map, bo);
 130     intel_batchbuffer_emit_dword(batch, bo->offset + delta);
 131 }
 132
 133 void
 134 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 135                                    unsigned int size)
 136 {
 137     assert(size < batch->size - 8);
 138
 139     if (intel_batchbuffer_space(batch) < size) {
 140         intel_batchbuffer_flush(batch);
 141     }
 142 }
 143
 144 void
 145 intel_batchbuffer_data(struct intel_batchbuffer *batch,
 146                           void *data,
 147                           unsigned int size)
 148 {
 149     assert((size & 3) == 0);
 150     intel_batchbuffer_require_space(batch, size);
 151
 152     assert(batch->ptr);
 153     memcpy(batch->ptr, data, size);
 154     batch->ptr += size;
 155 }
 156
 157 void
 158 intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch)
 159 {
 160     struct intel_driver_data *intel = batch->intel;
 161
 162     if (IS_GEN6(intel->device_id) ||
 163         IS_GEN7(intel->device_id)) {
 164         if (batch->flag == I915_EXEC_RENDER) {
 165             BEGIN_BATCH(batch, 4);
 166             OUT_BATCH(batch, CMD_PIPE_CONTROL | 0x2);
 167
 168             if (IS_GEN6(intel->device_id))
 169                 OUT_BATCH(batch,
 170                           CMD_PIPE_CONTROL_WC_FLUSH |
 171                           CMD_PIPE_CONTROL_TC_FLUSH |
 172                           CMD_PIPE_CONTROL_NOWRITE);
 173             else
 174                 OUT_BATCH(batch,
 175                           CMD_PIPE_CONTROL_WC_FLUSH |
 176                           CMD_PIPE_CONTROL_TC_FLUSH |
 177                           CMD_PIPE_CONTROL_DC_FLUSH |
 178                           CMD_PIPE_CONTROL_NOWRITE);
 179
 180             OUT_BATCH(batch, 0);
 181             OUT_BATCH(batch, 0);
 182             ADVANCE_BATCH(batch);
 183         } else {
 184             if (batch->flag == I915_EXEC_BLT) {
 185                 BEGIN_BLT_BATCH(batch, 4);
 186                 OUT_BLT_BATCH(batch, MI_FLUSH_DW);
 187                 OUT_BLT_BATCH(batch, 0);
 188                 OUT_BLT_BATCH(batch, 0);
 189                 OUT_BLT_BATCH(batch, 0);
 190                 ADVANCE_BLT_BATCH(batch);
 191             } else {
 192                 assert(batch->flag == I915_EXEC_BSD);
 193                 BEGIN_BCS_BATCH(batch, 4);
 194                 OUT_BCS_BATCH(batch, MI_FLUSH_DW | MI_FLUSH_DW_VIDEO_PIPELINE_CACHE_INVALIDATE);
 195                 OUT_BCS_BATCH(batch, 0);
 196                 OUT_BCS_BATCH(batch, 0);
 197                 OUT_BCS_BATCH(batch, 0);
 198                 ADVANCE_BCS_BATCH(batch);
 199             }
 200         }
 201     } else {
 202         if (batch->flag == I915_EXEC_RENDER) {
 203             BEGIN_BATCH(batch, 1);
 204             OUT_BATCH(batch, MI_FLUSH | MI_FLUSH_STATE_INSTRUCTION_CACHE_INVALIDATE);
 205             ADVANCE_BATCH(batch);
 206         } else {
 207             assert(batch->flag == I915_EXEC_BSD);
 208             BEGIN_BCS_BATCH(batch, 1);
 209             OUT_BCS_BATCH(batch, MI_FLUSH | MI_FLUSH_STATE_INSTRUCTION_CACHE_INVALIDATE);
 210             ADVANCE_BCS_BATCH(batch);
 211         }
 212     }
 213 }
 214
 215 void
 216 intel_batchbuffer_begin_batch(struct intel_batchbuffer *batch, int total)
 217 {
 218     batch->emit_total = total * 4;
 219     batch->emit_start = batch->ptr;
 220 }
 221
 222 void
 223 intel_batchbuffer_advance_batch(struct intel_batchbuffer *batch)
 224 {
 225     assert(batch->emit_total == (batch->ptr - batch->emit_start));
 226 }
 227
 228 void
 229 intel_batchbuffer_check_batchbuffer_flag(struct intel_batchbuffer *batch, int flag)
 230 {
 231     if (flag != I915_EXEC_RENDER &&
 232         flag != I915_EXEC_BLT &&
 233         flag != I915_EXEC_BSD)
 234         return;
 235
 236     if (batch->flag == flag)
 237         return;
 238
 239     intel_batchbuffer_flush(batch);
 240     batch->flag = flag;
 241 }
 242
 243 int
 244 intel_batchbuffer_check_free_space(struct intel_batchbuffer *batch, int size)
 245 {
 246     return intel_batchbuffer_space(batch) >= size;
 247 }
 248
 249 static void
 250 intel_batchbuffer_start_atomic_helper(struct intel_batchbuffer *batch,
 251                                       int flag,
 252                                       unsigned int size)
 253 {
 254     assert(!batch->atomic);
 255     intel_batchbuffer_check_batchbuffer_flag(batch, flag);
 256     intel_batchbuffer_require_space(batch, size);
 257     batch->atomic = 1;
 258 }
 259
 260 void
 261 intel_batchbuffer_start_atomic(struct intel_batchbuffer *batch, unsigned int size)
 262 {
 263     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_RENDER, size);
 264 }
 265
 266 void
 267 intel_batchbuffer_start_atomic_blt(struct intel_batchbuffer *batch, unsigned int size)
 268 {
 269     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_BLT, size);
 270 }
 271
 272 void
 273 intel_batchbuffer_start_atomic_bcs(struct intel_batchbuffer *batch, unsigned int size)
 274 {
 275     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_BSD, size);
 276 }
 277
 278 void
 279 intel_batchbuffer_end_atomic(struct intel_batchbuffer *batch)
 280 {
 281     assert(batch->atomic);
 282     batch->atomic = 0;
 283 }