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  1. /*
  2.  * Copyright © 2011 Intel Corporation
  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 FROM,
  20.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21.  * SOFTWARE.
  22.  *
  23.  * Authors:
  24.  *    Chris Wilson <chris@chris-wilson.co.uk>
  25.  *
  26.  */
  27.  
  28. #include <linux/kernel.h>
  29. #include "../bitmap.h"
  30.  
  31. #include "sna.h"
  32. #include "sna_render.h"
  33. #include <memory.h>
  34.  
  35. #if DEBUG_STREAM
  36. #undef DBG
  37. #define DBG(x) ErrorF x
  38. #endif
  39.  
  40. int sna_static_stream_init(struct sna_static_stream *stream)
  41. {
  42.         stream->used = 0;
  43.         stream->size = 64*1024;
  44.  
  45.         stream->data = malloc(stream->size);
  46.         return stream->data != NULL;
  47. }
  48.  
  49. static uint32_t sna_static_stream_alloc(struct sna_static_stream *stream,
  50.                                         uint32_t len, uint32_t align)
  51. {
  52.         uint32_t offset = ALIGN(stream->used, align);
  53.         uint32_t size = offset + len;
  54.  
  55.         if (size > stream->size) {
  56. /*
  57.                 do
  58.                         stream->size *= 2;
  59.                 while (stream->size < size);
  60.  
  61.                 stream->data = realloc(stream->data, stream->size);
  62. */
  63.         dbgprintf("%s: EPIC FAIL\n", __FUNCTION__);
  64.         return 0;
  65.         }
  66.  
  67.         stream->used = size;
  68.         return offset;
  69. }
  70.  
  71. uint32_t sna_static_stream_add(struct sna_static_stream *stream,
  72.                                const void *data, uint32_t len, uint32_t align)
  73. {
  74.         uint32_t offset = sna_static_stream_alloc(stream, len, align);
  75.         memcpy(stream->data + offset, data, len);
  76.         return offset;
  77. }
  78.  
  79. void *sna_static_stream_map(struct sna_static_stream *stream,
  80.                             uint32_t len, uint32_t align)
  81. {
  82.         uint32_t offset = sna_static_stream_alloc(stream, len, align);
  83.         return memset(stream->data + offset, 0, len);
  84. }
  85.  
  86. uint32_t sna_static_stream_offsetof(struct sna_static_stream *stream, void *ptr)
  87. {
  88.         return (uint8_t *)ptr - stream->data;
  89. }
  90.  
  91.  
  92. struct kgem_bo *sna_static_stream_fini(struct sna *sna,
  93.                                        struct sna_static_stream *stream)
  94. {
  95.         struct kgem_bo *bo;
  96.  
  97.         DBG(("uploaded %d bytes of static state\n", stream->used));
  98.  
  99.         bo = kgem_create_linear(&sna->kgem, stream->used);
  100.         if (bo && !kgem_bo_write(&sna->kgem, bo, stream->data, stream->used)) {
  101. //       kgem_bo_destroy(&sna->kgem, bo);
  102.                 return NULL;
  103.         }
  104.  
  105.         free(stream->data);
  106.     LEAVE();
  107.         return bo;
  108. }
  109.