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"),
6 * to deal in the Software without restriction, including without limitation
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
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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
31void *
32swr_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
79void
80swr_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
88void
89swr_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}
102