src/gallium/drivers/swr/swr_scratch.cpp

   1 /****************************************************************************
   2  * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
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   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  ***************************************************************************/
  23
  24 #include "util/u_memory.h"
  25 #include "swr_context.h"
  26 #include "swr_screen.h"
  27 #include "swr_scratch.h"
  28 #include "swr_fence.h"
  29 #include "swr_fence_work.h"
  30 #include "api.h"
  31
  32 void *
  33 swr_copy_to_scratch_space(struct swr_context *ctx,
  34                           struct swr_scratch_space *space,
  35                           const void *user_buffer,
  36                           unsigned int size)
  37 {
  38    void *ptr;
  39    assert(space);
  40    assert(size);
  41
  42    /* Allocate enough so that MAX_DRAWS_IN_FLIGHT sets fit. */
  43    uint32_t max_size_in_flight = size * ctx->max_draws_in_flight;
  44
  45    /* Need to grow space */
  46    if (max_size_in_flight > space->current_size) {
  47       space->current_size = max_size_in_flight;
  48
  49       if (space->base) {
  50          /* defer delete, use aligned-free, fence finish enforces the defer
  51           * delete will be on the *next* fence */
  52          struct swr_screen *screen = swr_screen(ctx->pipe.screen);
  53          swr_fence_finish(ctx->pipe.screen, NULL, screen->flush_fence, 0);
  54          swr_fence_work_free(screen->flush_fence, space->base, true);
  55          space->base = NULL;
  56       }
  57
  58       if (!space->base) {
  59          space->base = (uint8_t *)AlignedMalloc(space->current_size,
  60                                                 sizeof(void *));
  61          space->head = (void *)space->base;
  62       }
  63    }
  64
  65    /* Wrap */
  66    if (((uint8_t *)space->head + size)
  67        >= ((uint8_t *)space->base + space->current_size)) {
  68       space->head = space->base;
  69    }
  70
  71    ptr = space->head;
  72    space->head = (uint8_t *)space->head + size;
  73
  74    /* Copy user_buffer to scratch */
  75    if (user_buffer)
  76       memcpy(ptr, user_buffer, size);
  77
  78    return ptr;
  79 }
  80
  81
  82 void
  83 swr_init_scratch_buffers(struct swr_context *ctx)
  84 {
  85    struct swr_scratch_buffers *scratch;
  86
  87    scratch = CALLOC_STRUCT(swr_scratch_buffers);
  88    ctx->scratch = scratch;
  89 }
  90
  91 void
  92 swr_destroy_scratch_buffers(struct swr_context *ctx)
  93 {
  94    struct swr_scratch_buffers *scratch = ctx->scratch;
  95
  96    if (scratch) {
  97       AlignedFree(scratch->vs_constants.base);
  98       AlignedFree(scratch->fs_constants.base);
  99       AlignedFree(scratch->gs_constants.base);
 100       AlignedFree(scratch->tcs_constants.base);
 101       AlignedFree(scratch->tes_constants.base);
 102       AlignedFree(scratch->vertex_buffer.base);
 103       AlignedFree(scratch->index_buffer.base);
 104       FREE(scratch);
 105    }
 106 }