src/gallium/drivers/ilo/ilo_gpgpu.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2012-2013 LunarG, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #include "util/u_upload_mgr.h"
  29 #include "ilo_context.h"
  30 #include "ilo_render.h"
  31 #include "ilo_shader.h"
  32 #include "ilo_gpgpu.h"
  33
  34 static void
  35 launch_grid(struct ilo_context *ilo,
  36             const uint *block_layout, const uint *grid_layout,
  37             const struct pipe_constant_buffer *input, uint32_t pc)
  38 {
  39    const unsigned grid_offset[3] = { 0, 0, 0 };
  40    const unsigned thread_group_size =
  41       block_layout[0] * block_layout[1] * block_layout[2];
  42    int max_len, before_space;
  43
  44    ilo_cp_set_owner(ilo->cp, INTEL_RING_RENDER, NULL);
  45
  46    max_len = ilo_render_get_launch_grid_len(ilo->render, &ilo->state_vector);
  47    max_len += ilo_render_get_flush_len(ilo->render) * 2;
  48
  49    if (max_len > ilo_cp_space(ilo->cp)) {
  50       ilo_cp_submit(ilo->cp, "out of space");
  51       assert(max_len <= ilo_cp_space(ilo->cp));
  52    }
  53
  54    before_space = ilo_cp_space(ilo->cp);
  55
  56    while (true) {
  57       struct ilo_builder_snapshot snapshot;
  58
  59       ilo_builder_batch_snapshot(&ilo->cp->builder, &snapshot);
  60
  61       ilo_render_emit_launch_grid(ilo->render, &ilo->state_vector,
  62             grid_offset, grid_layout, thread_group_size, input, pc);
  63
  64       if (!ilo_builder_validate(&ilo->cp->builder, 0, NULL)) {
  65          ilo_builder_batch_restore(&ilo->cp->builder, &snapshot);
  66
  67          /* flush and try again */
  68          if (ilo_builder_batch_used(&ilo->cp->builder)) {
  69             ilo_cp_submit(ilo->cp, "out of aperture");
  70             continue;
  71          }
  72       }
  73
  74       break;
  75    }
  76
  77    /* sanity check size estimation */
  78    assert(before_space - ilo_cp_space(ilo->cp) <= max_len);
  79 }
  80
  81 static void
  82 ilo_launch_grid(struct pipe_context *pipe, const struct pipe_grid_info *info)
  83 {
  84    struct ilo_context *ilo = ilo_context(pipe);
  85    struct ilo_shader_state *cs = ilo->state_vector.cs;
  86    struct pipe_constant_buffer input_buf;
  87
  88    memset(&input_buf, 0, sizeof(input_buf));
  89
  90    input_buf.buffer_size =
  91       ilo_shader_get_kernel_param(cs, ILO_KERNEL_CS_INPUT_SIZE);
  92    if (input_buf.buffer_size) {
  93       u_upload_data(ilo->uploader, 0, input_buf.buffer_size, 16, info->input,
  94             &input_buf.buffer_offset, &input_buf.buffer);
  95    }
  96
  97    ilo_shader_cache_upload(ilo->shader_cache, &ilo->cp->builder);
  98
  99    launch_grid(ilo, info->block, info->grid, &input_buf, info->pc);
 100
 101    ilo_render_invalidate_hw(ilo->render);
 102
 103    if (ilo_debug & ILO_DEBUG_NOCACHE)
 104       ilo_render_emit_flush(ilo->render);
 105
 106    if (input_buf.buffer_size)
 107       pipe_resource_reference(&input_buf.buffer, NULL);
 108 }
 109
 110 /**
 111  * Initialize GPGPU-related functions.
 112  */
 113 void
 114 ilo_init_gpgpu_functions(struct ilo_context *ilo)
 115 {
 116    ilo->base.launch_grid = ilo_launch_grid;
 117 }