i965_drv_video/intel_batchbuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
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  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  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
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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  26  **************************************************************************/
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <assert.h>
  31
  32 #include <va/va_backend.h>
  33
  34 #include "intel_batchbuffer.h"
  35
  36 static void
  37 intel_batchbuffer_reset(struct intel_batchbuffer *batch)
  38 {
  39     struct intel_driver_data *intel = batch->intel;
  40     int batch_size = BATCH_SIZE;
  41
  42     assert(batch->flag == I915_EXEC_RENDER ||
  43            batch->flag == I915_EXEC_BLT ||
  44            batch->flag == I915_EXEC_BSD);
  45
  46     dri_bo_unreference(batch->buffer);
  47     batch->buffer = dri_bo_alloc(intel->bufmgr,
  48                                  "batch buffer",
  49                                  batch_size,
  50                                  0x1000);
  51     assert(batch->buffer);
  52     dri_bo_map(batch->buffer, 1);
  53     assert(batch->buffer->virtual);
  54     batch->map = batch->buffer->virtual;
  55     batch->size = batch_size;
  56     batch->ptr = batch->map;
  57     batch->atomic = 0;
  58 }
  59
  60 static unsigned int
  61 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  62 {
  63     return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  64 }
  65
  66
  67 struct intel_batchbuffer *
  68 intel_batchbuffer_new(struct intel_driver_data *intel, int flag)
  69 {
  70     struct intel_batchbuffer *batch = calloc(1, sizeof(*batch));
  71     assert(flag == I915_EXEC_RENDER ||
  72            flag == I915_EXEC_BSD ||
  73            flag == I915_EXEC_BLT);
  74
  75     batch->intel = intel;
  76     batch->flag = flag;
  77     batch->run = drm_intel_bo_mrb_exec;
  78     intel_batchbuffer_reset(batch);
  79
  80     return batch;
  81 }
  82
  83 void intel_batchbuffer_free(struct intel_batchbuffer *batch)
  84 {
  85     if (batch->map) {
  86         dri_bo_unmap(batch->buffer);
  87         batch->map = NULL;
  88     }
  89
  90     dri_bo_unreference(batch->buffer);
  91     free(batch);
  92 }
  93
  94 void
  95 intel_batchbuffer_flush(struct intel_batchbuffer *batch)
  96 {
  97     unsigned int used = batch->ptr - batch->map;
  98
  99     if (used == 0) {
 100         return;
 101     }
 102
 103     if ((used & 4) == 0) {
 104         *(unsigned int*)batch->ptr = 0;
 105         batch->ptr += 4;
 106     }
 107
 108     *(unsigned int*)batch->ptr = MI_BATCH_BUFFER_END;
 109     batch->ptr += 4;
 110     dri_bo_unmap(batch->buffer);
 111     used = batch->ptr - batch->map;
 112     batch->run(batch->buffer, used, 0, 0, 0, batch->flag);
 113     intel_batchbuffer_reset(batch);
 114 }
 115
 116 void
 117 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, unsigned int x)
 118 {
 119     assert(intel_batchbuffer_space(batch) >= 4);
 120     *(unsigned int *)batch->ptr = x;
 121     batch->ptr += 4;
 122 }
 123
 124 void
 125 intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch, dri_bo *bo,
 126                                 uint32_t read_domains, uint32_t write_domains,
 127                                 uint32_t delta)
 128 {
 129     assert(batch->ptr - batch->map < batch->size);
 130     dri_bo_emit_reloc(batch->buffer, read_domains, write_domains,
 131                       delta, batch->ptr - batch->map, bo);
 132     intel_batchbuffer_emit_dword(batch, bo->offset + delta);
 133 }
 134
 135 void
 136 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 137                                    unsigned int size)
 138 {
 139     assert(size < batch->size - 8);
 140
 141     if (intel_batchbuffer_space(batch) < size) {
 142         intel_batchbuffer_flush(batch);
 143     }
 144 }
 145
 146 void
 147 intel_batchbuffer_data(struct intel_batchbuffer *batch,
 148                           void *data,
 149                           unsigned int size)
 150 {
 151     assert((size & 3) == 0);
 152     intel_batchbuffer_require_space(batch, size);
 153
 154     assert(batch->ptr);
 155     memcpy(batch->ptr, data, size);
 156     batch->ptr += size;
 157 }
 158
 159 void
 160 intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch)
 161 {
 162     struct intel_driver_data *intel = batch->intel;
 163
 164     if (IS_GEN6(intel->device_id)) {
 165         if (batch->flag == I915_EXEC_RENDER) {
 166             BEGIN_BATCH(batch, 4);
 167             OUT_BATCH(batch, CMD_PIPE_CONTROL | 0x2);
 168             OUT_BATCH(batch,
 169                       CMD_PIPE_CONTROL_WC_FLUSH |
 170                       CMD_PIPE_CONTROL_TC_FLUSH |
 171                       CMD_PIPE_CONTROL_NOWRITE);
 172             OUT_BATCH(batch, 0);
 173             OUT_BATCH(batch, 0);
 174             ADVANCE_BATCH(batch);
 175         } else {
 176             if (batch->flag == I915_EXEC_BLT) {
 177                 BEGIN_BLT_BATCH(batch, 4);
 178                 OUT_BLT_BATCH(batch, MI_FLUSH_DW);
 179                 OUT_BLT_BATCH(batch, 0);
 180                 OUT_BLT_BATCH(batch, 0);
 181                 OUT_BLT_BATCH(batch, 0);
 182                 ADVANCE_BLT_BATCH(batch);
 183             } else {
 184                 assert(batch->flag == I915_EXEC_BSD);
 185                 BEGIN_BCS_BATCH(batch, 4);
 186                 OUT_BCS_BATCH(batch, MI_FLUSH_DW | MI_FLUSH_DW_VIDEO_PIPELINE_CACHE_INVALIDATE);
 187                 OUT_BCS_BATCH(batch, 0);
 188                 OUT_BCS_BATCH(batch, 0);
 189                 OUT_BCS_BATCH(batch, 0);
 190                 ADVANCE_BCS_BATCH(batch);
 191             }
 192         }
 193     } else {
 194         if (batch->flag == I915_EXEC_RENDER) {
 195             BEGIN_BATCH(batch, 1);
 196             OUT_BATCH(batch, MI_FLUSH | MI_FLUSH_STATE_INSTRUCTION_CACHE_INVALIDATE);
 197             ADVANCE_BATCH(batch);
 198         } else {
 199             assert(batch->flag == I915_EXEC_BSD);
 200             BEGIN_BCS_BATCH(batch, 1);
 201             OUT_BCS_BATCH(batch, MI_FLUSH | MI_FLUSH_STATE_INSTRUCTION_CACHE_INVALIDATE);
 202             ADVANCE_BCS_BATCH(batch);
 203         }
 204     }
 205 }
 206
 207 void
 208 intel_batchbuffer_begin_batch(struct intel_batchbuffer *batch, int total)
 209 {
 210     batch->emit_total = total * 4;
 211     batch->emit_start = batch->ptr;
 212 }
 213
 214 void
 215 intel_batchbuffer_advance_batch(struct intel_batchbuffer *batch)
 216 {
 217     assert(batch->emit_total == (batch->ptr - batch->emit_start));
 218 }
 219
 220 void
 221 intel_batchbuffer_check_batchbuffer_flag(struct intel_batchbuffer *batch, int flag)
 222 {
 223     if (flag != I915_EXEC_RENDER &&
 224         flag != I915_EXEC_BLT &&
 225         flag != I915_EXEC_BSD)
 226         return;
 227
 228     if (batch->flag == flag)
 229         return;
 230
 231     intel_batchbuffer_flush(batch);
 232     batch->flag = flag;
 233 }
 234
 235 int
 236 intel_batchbuffer_check_free_space(struct intel_batchbuffer *batch, int size)
 237 {
 238     return intel_batchbuffer_space(batch) >= size;
 239 }
 240
 241 static void
 242 intel_batchbuffer_start_atomic_helper(struct intel_batchbuffer *batch,
 243                                       int flag,
 244                                       unsigned int size)
 245 {
 246     assert(!batch->atomic);
 247     intel_batchbuffer_check_batchbuffer_flag(batch, flag);
 248     intel_batchbuffer_require_space(batch, size);
 249     batch->atomic = 1;
 250 }
 251
 252 void
 253 intel_batchbuffer_start_atomic(struct intel_batchbuffer *batch, unsigned int size)
 254 {
 255     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_RENDER, size);
 256 }
 257
 258 void
 259 intel_batchbuffer_start_atomic_blt(struct intel_batchbuffer *batch, unsigned int size)
 260 {
 261     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_BLT, size);
 262 }
 263
 264 void
 265 intel_batchbuffer_start_atomic_bcs(struct intel_batchbuffer *batch, unsigned int size)
 266 {
 267     intel_batchbuffer_start_atomic_helper(batch, I915_EXEC_BSD, size);
 268 }
 269
 270 void
 271 intel_batchbuffer_end_atomic(struct intel_batchbuffer *batch)
 272 {
 273     assert(batch->atomic);
 274     batch->atomic = 0;
 275 }