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                       int index)
  43 {
  44    struct intel_batchbuffer *batch = &brw->batch;
  45
  46    if (!brw->state_batch_list) {
  47       /* Our structs are always aligned to at least 32 bytes, so
  48        * our array doesn't need to be any larger
  49        * TODO: don't use rzalloc
  50        */
  51       brw->state_batch_list = rzalloc_size(brw, sizeof(*brw->state_batch_list) *
  52                                            batch->bo->size / 32);
  53    }
  54
  55    brw->state_batch_list[brw->state_batch_count].offset = offset;
  56    brw->state_batch_list[brw->state_batch_count].size = size;
  57    brw->state_batch_list[brw->state_batch_count].type = type;
  58    brw->state_batch_list[brw->state_batch_count].index = index;
  59    brw->state_batch_count++;
  60 }
  61
  62 /**
  63  * Convenience function to populate a single drm_intel_aub_annotation data
  64  * structure.
  65  */
  66 static inline void
  67 make_annotation(drm_intel_aub_annotation *annotation, uint32_t type,
  68                 uint32_t subtype, uint32_t ending_offset)
  69 {
  70    annotation->type = type;
  71    annotation->subtype = subtype;
  72    annotation->ending_offset = ending_offset;
  73 }
  74
  75 /**
  76  * Generate a set of aub file annotations for the current batch buffer, and
  77  * deliver them to DRM.
  78  *
  79  * The "used" section of the batch buffer (the portion containing batch
  80  * commands) is annotated with AUB_TRACE_TYPE_BATCH.  The remainder of the
  81  * batch buffer (which contains data structures pointed to by batch commands)
  82  * is annotated according to the type of each data structure.
  83  */
  84 void
  85 brw_annotate_aub(struct brw_context *brw)
  86 {
  87    unsigned annotation_count = 2 * brw->state_batch_count + 1;
  88    drm_intel_aub_annotation annotations[annotation_count];
  89    int a = 0;
  90    make_annotation(&annotations[a++], AUB_TRACE_TYPE_BATCH, 0,
  91                    4 * USED_BATCH(brw->batch));
  92    for (int i = brw->state_batch_count; i-- > 0; ) {
  93       uint32_t type = brw->state_batch_list[i].type;
  94       uint32_t start_offset = brw->state_batch_list[i].offset;
  95       uint32_t end_offset = start_offset + brw->state_batch_list[i].size;
  96       make_annotation(&annotations[a++], AUB_TRACE_TYPE_NOTYPE, 0,
  97                       start_offset);
  98       make_annotation(&annotations[a++], AUB_TRACE_TYPE(type),
  99                       AUB_TRACE_SUBTYPE(type), end_offset);
 100    }
 101    assert(a == annotation_count);
 102    drm_intel_bufmgr_gem_set_aub_annotations(brw->batch.bo, annotations,
 103                                             annotation_count);
 104 }
 105
 106 /**
 107  * Allocates a block of space in the batchbuffer for indirect state.
 108  *
 109  * We don't want to allocate separate BOs for every bit of indirect
 110  * state in the driver.  It means overallocating by a significant
 111  * margin (4096 bytes, even if the object is just a 20-byte surface
 112  * state), and more buffers to walk and count for aperture size checking.
 113  *
 114  * However, due to the restrictions imposed by the aperture size
 115  * checking performance hacks, we can't have the batch point at a
 116  * separate indirect state buffer, because once the batch points at
 117  * it, no more relocations can be added to it.  So, we sneak these
 118  * buffers in at the top of the batchbuffer.
 119  */
 120 void *
 121 __brw_state_batch(struct brw_context *brw,
 122                   enum aub_state_struct_type type,
 123                   int size,
 124                   int alignment,
 125                   int index,
 126                   uint32_t *out_offset)
 127
 128 {
 129    struct intel_batchbuffer *batch = &brw->batch;
 130    uint32_t offset;
 131
 132    assert(size < batch->bo->size);
 133    offset = ROUND_DOWN_TO(batch->state_batch_offset - size, alignment);
 134
 135    /* If allocating from the top would wrap below the batchbuffer, or
 136     * if the batch's used space (plus the reserved pad) collides with our
 137     * space, then flush and try again.
 138     */
 139    if (batch->state_batch_offset < size ||
 140        offset < 4 * USED_BATCH(*batch) + batch->reserved_space) {
 141       intel_batchbuffer_flush(brw);
 142       offset = ROUND_DOWN_TO(batch->state_batch_offset - size, alignment);
 143    }
 144
 145    batch->state_batch_offset = offset;
 146
 147    if (unlikely(INTEL_DEBUG & (DEBUG_BATCH | DEBUG_AUB)))
 148       brw_track_state_batch(brw, type, offset, size, index);
 149
 150    *out_offset = offset;
 151    return batch->map + (offset>>2);
 152 }