src/mesa/drivers/dri/i965/brw_state_batch.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics 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 <keithw@vmware.com>
  30   */
  31
  32 #include "brw_state.h"
  33 #include "intel_batchbuffer.h"
  34 #include "main/imports.h"
  35 #include "util/ralloc.h"
  36
  37 static void
  38 brw_track_state_batch(struct brw_context *brw,
  39                       enum aub_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 aub_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 }