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  1. /*
  2.  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
  3.  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
  4.  develop this 3D driver.
  5.  
  6.  Permission is hereby granted, free of charge, to any person obtaining
  7.  a 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, sublicense, 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
  16.  portions of the Software.
  17.  
  18.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19.  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21.  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22.  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23.  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24.  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  
  26.  **********************************************************************/
  27.  /*
  28.   * Authors:
  29.   *   Keith Whitwell <keith@tungstengraphics.com>
  30.   */
  31.  
  32. #include "brw_state.h"
  33. #include "intel_batchbuffer.h"
  34. #include "main/imports.h"
  35. #include "glsl/ralloc.h"
  36.  
  37. static void
  38. brw_track_state_batch(struct brw_context *brw,
  39.                       enum state_struct_type type,
  40.                       uint32_t offset,
  41.                       int size)
  42. {
  43.    struct intel_batchbuffer *batch = &brw->batch;
  44.  
  45.    if (!brw->state_batch_list) {
  46.       /* Our structs are always aligned to at least 32 bytes, so
  47.        * our array doesn't need to be any larger
  48.        */
  49.       brw->state_batch_list = ralloc_size(brw, sizeof(*brw->state_batch_list) *
  50.                                           batch->bo->size / 32);
  51.    }
  52.  
  53.    brw->state_batch_list[brw->state_batch_count].offset = offset;
  54.    brw->state_batch_list[brw->state_batch_count].size = size;
  55.    brw->state_batch_list[brw->state_batch_count].type = type;
  56.    brw->state_batch_count++;
  57. }
  58.  
  59. /**
  60.  * Convenience function to populate a single drm_intel_aub_annotation data
  61.  * structure.
  62.  */
  63. static inline void
  64. make_annotation(drm_intel_aub_annotation *annotation, uint32_t type,
  65.                 uint32_t subtype, uint32_t ending_offset)
  66. {
  67.    annotation->type = type;
  68.    annotation->subtype = subtype;
  69.    annotation->ending_offset = ending_offset;
  70. }
  71.  
  72. /**
  73.  * Generate a set of aub file annotations for the current batch buffer, and
  74.  * deliver them to DRM.
  75.  *
  76.  * The "used" section of the batch buffer (the portion containing batch
  77.  * commands) is annotated with AUB_TRACE_TYPE_BATCH.  The remainder of the
  78.  * batch buffer (which contains data structures pointed to by batch commands)
  79.  * is annotated according to the type of each data structure.
  80.  */
  81. void
  82. brw_annotate_aub(struct brw_context *brw)
  83. {
  84.    unsigned annotation_count = 2 * brw->state_batch_count + 1;
  85.    drm_intel_aub_annotation annotations[annotation_count];
  86.    int a = 0;
  87.    make_annotation(&annotations[a++], AUB_TRACE_TYPE_BATCH, 0,
  88.                    4*brw->batch.used);
  89.    for (int i = brw->state_batch_count; i-- > 0; ) {
  90.       uint32_t type = brw->state_batch_list[i].type;
  91.       uint32_t start_offset = brw->state_batch_list[i].offset;
  92.       uint32_t end_offset = start_offset + brw->state_batch_list[i].size;
  93.       make_annotation(&annotations[a++], AUB_TRACE_TYPE_NOTYPE, 0,
  94.                       start_offset);
  95.       make_annotation(&annotations[a++], AUB_TRACE_TYPE(type),
  96.                       AUB_TRACE_SUBTYPE(type), end_offset);
  97.    }
  98.    assert(a == annotation_count);
  99.    drm_intel_bufmgr_gem_set_aub_annotations(brw->batch.bo, annotations,
  100.                                             annotation_count);
  101. }
  102.  
  103. /**
  104.  * Allocates a block of space in the batchbuffer for indirect state.
  105.  *
  106.  * We don't want to allocate separate BOs for every bit of indirect
  107.  * state in the driver.  It means overallocating by a significant
  108.  * margin (4096 bytes, even if the object is just a 20-byte surface
  109.  * state), and more buffers to walk and count for aperture size checking.
  110.  *
  111.  * However, due to the restrictions inposed by the aperture size
  112.  * checking performance hacks, we can't have the batch point at a
  113.  * separate indirect state buffer, because once the batch points at
  114.  * it, no more relocations can be added to it.  So, we sneak these
  115.  * buffers in at the top of the batchbuffer.
  116.  */
  117. void *
  118. brw_state_batch(struct brw_context *brw,
  119.                 enum state_struct_type type,
  120.                 int size,
  121.                 int alignment,
  122.                 uint32_t *out_offset)
  123. {
  124.    struct intel_batchbuffer *batch = &brw->batch;
  125.    uint32_t offset;
  126.  
  127.    assert(size < batch->bo->size);
  128.    offset = ROUND_DOWN_TO(batch->state_batch_offset - size, alignment);
  129.  
  130.    /* If allocating from the top would wrap below the batchbuffer, or
  131.     * if the batch's used space (plus the reserved pad) collides with our
  132.     * space, then flush and try again.
  133.     */
  134.    if (batch->state_batch_offset < size ||
  135.        offset < 4*batch->used + batch->reserved_space) {
  136.       intel_batchbuffer_flush(brw);
  137.       offset = ROUND_DOWN_TO(batch->state_batch_offset - size, alignment);
  138.    }
  139.  
  140.    batch->state_batch_offset = offset;
  141.  
  142.    if (unlikely(INTEL_DEBUG & (DEBUG_BATCH | DEBUG_AUB)))
  143.       brw_track_state_batch(brw, type, offset, size);
  144.  
  145.    *out_offset = offset;
  146.    return batch->map + (offset>>2);
  147. }
  148.