src/mesa/drivers/dri/i915/intel_batchbuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "intel_context.h"
  29 #include "intel_batchbuffer.h"
  30 #include "intel_buffer_objects.h"
  31 #include "intel_reg.h"
  32 #include "intel_bufmgr.h"
  33 #include "intel_buffers.h"
  34
  35 static void
  36 intel_batchbuffer_reset(struct intel_context *intel);
  37
  38 void
  39 intel_batchbuffer_init(struct intel_context *intel)
  40 {
  41    intel_batchbuffer_reset(intel);
  42
  43    intel->batch.cpu_map = malloc(intel->maxBatchSize);
  44    intel->batch.map = intel->batch.cpu_map;
  45 }
  46
  47 static void
  48 intel_batchbuffer_reset(struct intel_context *intel)
  49 {
  50    if (intel->batch.last_bo != NULL) {
  51       drm_intel_bo_unreference(intel->batch.last_bo);
  52       intel->batch.last_bo = NULL;
  53    }
  54    intel->batch.last_bo = intel->batch.bo;
  55
  56    intel->batch.bo = drm_intel_bo_alloc(intel->bufmgr, "batchbuffer",
  57                                         intel->maxBatchSize, 4096);
  58
  59    intel->batch.reserved_space = BATCH_RESERVED;
  60    intel->batch.used = 0;
  61 }
  62
  63 void
  64 intel_batchbuffer_free(struct intel_context *intel)
  65 {
  66    free(intel->batch.cpu_map);
  67    drm_intel_bo_unreference(intel->batch.last_bo);
  68    drm_intel_bo_unreference(intel->batch.bo);
  69 }
  70
  71 static void
  72 do_batch_dump(struct intel_context *intel)
  73 {
  74    struct drm_intel_decode *decode;
  75    struct intel_batchbuffer *batch = &intel->batch;
  76    int ret;
  77
  78    decode = drm_intel_decode_context_alloc(intel->intelScreen->deviceID);
  79    if (!decode)
  80       return;
  81
  82    ret = drm_intel_bo_map(batch->bo, false);
  83    if (ret == 0) {
  84       drm_intel_decode_set_batch_pointer(decode,
  85                                          batch->bo->virtual,
  86                                          batch->bo->offset,
  87                                          batch->used);
  88    } else {
  89       fprintf(stderr,
  90               "WARNING: failed to map batchbuffer (%s), "
  91               "dumping uploaded data instead.\n", strerror(ret));
  92
  93       drm_intel_decode_set_batch_pointer(decode,
  94                                          batch->map,
  95                                          batch->bo->offset,
  96                                          batch->used);
  97    }
  98
  99    drm_intel_decode(decode);
 100
 101    drm_intel_decode_context_free(decode);
 102
 103    if (ret == 0) {
 104       drm_intel_bo_unmap(batch->bo);
 105
 106       if (intel->vtbl.debug_batch != NULL)
 107          intel->vtbl.debug_batch(intel);
 108    }
 109 }
 110
 111 /* TODO: Push this whole function into bufmgr.
 112  */
 113 static int
 114 do_flush_locked(struct intel_context *intel)
 115 {
 116    struct intel_batchbuffer *batch = &intel->batch;
 117    int ret = 0;
 118
 119    ret = drm_intel_bo_subdata(batch->bo, 0, 4*batch->used, batch->map);
 120
 121    if (!intel->intelScreen->no_hw) {
 122       if (ret == 0) {
 123          if (unlikely(INTEL_DEBUG & DEBUG_AUB) && intel->vtbl.annotate_aub)
 124             intel->vtbl.annotate_aub(intel);
 125          ret = drm_intel_bo_mrb_exec(batch->bo, 4 * batch->used, NULL, 0, 0,
 126                                      I915_EXEC_RENDER);
 127       }
 128    }
 129
 130    if (unlikely(INTEL_DEBUG & DEBUG_BATCH))
 131       do_batch_dump(intel);
 132
 133    if (ret != 0) {
 134       fprintf(stderr, "intel_do_flush_locked failed: %s\n", strerror(-ret));
 135       exit(1);
 136    }
 137    intel->vtbl.new_batch(intel);
 138
 139    return ret;
 140 }
 141
 142 int
 143 _intel_batchbuffer_flush(struct intel_context *intel,
 144                          const char *file, int line)
 145 {
 146    int ret;
 147
 148    if (intel->batch.used == 0)
 149       return 0;
 150
 151    if (intel->first_post_swapbuffers_batch == NULL) {
 152       intel->first_post_swapbuffers_batch = intel->batch.bo;
 153       drm_intel_bo_reference(intel->first_post_swapbuffers_batch);
 154    }
 155
 156    if (unlikely(INTEL_DEBUG & DEBUG_BATCH))
 157       fprintf(stderr, "%s:%d: Batchbuffer flush with %db used\n", file, line,
 158               4*intel->batch.used);
 159
 160    intel->batch.reserved_space = 0;
 161
 162    if (intel->vtbl.finish_batch)
 163       intel->vtbl.finish_batch(intel);
 164
 165    /* Mark the end of the buffer. */
 166    intel_batchbuffer_emit_dword(intel, MI_BATCH_BUFFER_END);
 167    if (intel->batch.used & 1) {
 168       /* Round batchbuffer usage to 2 DWORDs. */
 169       intel_batchbuffer_emit_dword(intel, MI_NOOP);
 170    }
 171
 172    intel_upload_finish(intel);
 173
 174    /* Check that we didn't just wrap our batchbuffer at a bad time. */
 175    assert(!intel->no_batch_wrap);
 176
 177    ret = do_flush_locked(intel);
 178
 179    if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) {
 180       fprintf(stderr, "waiting for idle\n");
 181       drm_intel_bo_wait_rendering(intel->batch.bo);
 182    }
 183
 184    /* Reset the buffer:
 185     */
 186    intel_batchbuffer_reset(intel);
 187
 188    return ret;
 189 }
 190
 191
 192 /*  This is the only way buffers get added to the validate list.
 193  */
 194 bool
 195 intel_batchbuffer_emit_reloc(struct intel_context *intel,
 196                              drm_intel_bo *buffer,
 197                              uint32_t read_domains, uint32_t write_domain,
 198                              uint32_t delta)
 199 {
 200    int ret;
 201
 202    ret = drm_intel_bo_emit_reloc(intel->batch.bo, 4*intel->batch.used,
 203                                  buffer, delta,
 204                                  read_domains, write_domain);
 205    assert(ret == 0);
 206    (void)ret;
 207
 208    /*
 209     * Using the old buffer offset, write in what the right data would be, in case
 210     * the buffer doesn't move and we can short-circuit the relocation processing
 211     * in the kernel
 212     */
 213    intel_batchbuffer_emit_dword(intel, buffer->offset + delta);
 214
 215    return true;
 216 }
 217
 218 bool
 219 intel_batchbuffer_emit_reloc_fenced(struct intel_context *intel,
 220                                     drm_intel_bo *buffer,
 221                                     uint32_t read_domains,
 222                                     uint32_t write_domain,
 223                                     uint32_t delta)
 224 {
 225    int ret;
 226
 227    ret = drm_intel_bo_emit_reloc_fence(intel->batch.bo, 4*intel->batch.used,
 228                                        buffer, delta,
 229                                        read_domains, write_domain);
 230    assert(ret == 0);
 231    (void)ret;
 232
 233    /*
 234     * Using the old buffer offset, write in what the right data would
 235     * be, in case the buffer doesn't move and we can short-circuit the
 236     * relocation processing in the kernel
 237     */
 238    intel_batchbuffer_emit_dword(intel, buffer->offset + delta);
 239
 240    return true;
 241 }
 242
 243 void
 244 intel_batchbuffer_data(struct intel_context *intel,
 245                        const void *data, GLuint bytes)
 246 {
 247    assert((bytes & 3) == 0);
 248    intel_batchbuffer_require_space(intel, bytes);
 249    memcpy(intel->batch.map + intel->batch.used, data, bytes);
 250    intel->batch.used += bytes >> 2;
 251 }
 252
 253 /* Emit a pipelined flush to either flush render and texture cache for
 254  * reading from a FBO-drawn texture, or flush so that frontbuffer
 255  * render appears on the screen in DRI1.
 256  *
 257  * This is also used for the always_flush_cache driconf debug option.
 258  */
 259 void
 260 intel_batchbuffer_emit_mi_flush(struct intel_context *intel)
 261 {
 262    BEGIN_BATCH(1);
 263    OUT_BATCH(MI_FLUSH);
 264    ADVANCE_BATCH();
 265 }