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