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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   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   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
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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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_work.h"
  29 #include "api.h"
  30
  31 void *
  32 swr_copy_to_scratch_space(struct swr_context *ctx,
  33                           struct swr_scratch_space *space,
  34                           const void *user_buffer,
  35                           unsigned int size)
  36 {
  37    void *ptr;
  38    assert(space);
  39    assert(size);
  40
  41    /* Allocate enough so that MAX_DRAWS_IN_FLIGHT sets fit. */
  42    uint32_t max_size_in_flight = size * ctx->max_draws_in_flight;
  43
  44    /* Need to grow space */
  45    if (max_size_in_flight > space->current_size) {
  46       space->current_size = max_size_in_flight;
  47
  48       if (space->base) {
  49          /* defer delete, use aligned-free */
  50          struct swr_screen *screen = swr_screen(ctx->pipe.screen);
  51          swr_fence_work_free(screen->flush_fence, space->base, true);
  52          space->base = NULL;
  53       }
  54
  55       if (!space->base) {
  56          space->base = (uint8_t *)AlignedMalloc(space->current_size,
  57                                                 sizeof(void *));
  58          space->head = (void *)space->base;
  59       }
  60    }
  61
  62    /* Wrap */
  63    if (((uint8_t *)space->head + size)
  64        >= ((uint8_t *)space->base + space->current_size)) {
  65       space->head = space->base;
  66    }
  67
  68    ptr = space->head;
  69    space->head = (uint8_t *)space->head + size;
  70
  71    /* Copy user_buffer to scratch */
  72    if (user_buffer)
  73       memcpy(ptr, user_buffer, size);
  74
  75    return ptr;
  76 }
  77
  78
  79 void
  80 swr_init_scratch_buffers(struct swr_context *ctx)
  81 {
  82    struct swr_scratch_buffers *scratch;
  83
  84    scratch = CALLOC_STRUCT(swr_scratch_buffers);
  85    ctx->scratch = scratch;
  86 }
  87
  88 void
  89 swr_destroy_scratch_buffers(struct swr_context *ctx)
  90 {
  91    struct swr_scratch_buffers *scratch = ctx->scratch;
  92
  93    if (scratch) {
  94       AlignedFree(scratch->vs_constants.base);
  95       AlignedFree(scratch->fs_constants.base);
  96       AlignedFree(scratch->gs_constants.base);
  97       AlignedFree(scratch->vertex_buffer.base);
  98       AlignedFree(scratch->index_buffer.base);
  99       FREE(scratch);
 100    }
 101 }