src/mesa/drivers/dri/i965/intel_upload.c

   1 /*
   2  * Copyright 2003 VMware, Inc.
   3  * Copyright © 2007 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * 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 DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * @file intel_upload.c
  27  *
  28  * Batched upload via BOs.
  29  */
  30
  31 #include "main/imports.h"
  32 #include "main/mtypes.h"
  33 #include "main/macros.h"
  34 #include "main/bufferobj.h"
  35
  36 #include "brw_context.h"
  37 #include "intel_blit.h"
  38 #include "intel_buffer_objects.h"
  39 #include "intel_batchbuffer.h"
  40 #include "intel_fbo.h"
  41 #include "intel_mipmap_tree.h"
  42 #include "intel_regions.h"
  43
  44 #include "brw_context.h"
  45
  46 #define INTEL_UPLOAD_SIZE (64*1024)
  47
  48 void
  49 intel_upload_finish(struct brw_context *brw)
  50 {
  51    if (!brw->upload.bo)
  52       return;
  53
  54    if (brw->upload.buffer_len) {
  55       drm_intel_bo_subdata(brw->upload.bo,
  56                            brw->upload.buffer_offset,
  57                            brw->upload.buffer_len,
  58                            brw->upload.buffer);
  59       brw->upload.buffer_len = 0;
  60    }
  61
  62    drm_intel_bo_unreference(brw->upload.bo);
  63    brw->upload.bo = NULL;
  64 }
  65
  66 static void
  67 wrap_buffers(struct brw_context *brw, GLuint size)
  68 {
  69    intel_upload_finish(brw);
  70
  71    if (size < INTEL_UPLOAD_SIZE)
  72       size = INTEL_UPLOAD_SIZE;
  73
  74    brw->upload.bo = drm_intel_bo_alloc(brw->bufmgr, "upload", size, 0);
  75    brw->upload.offset = 0;
  76 }
  77
  78 void
  79 intel_upload_data(struct brw_context *brw,
  80                   const void *ptr, GLuint size, GLuint align,
  81                   drm_intel_bo **return_bo,
  82                   GLuint *return_offset)
  83 {
  84    GLuint base, delta;
  85
  86    base = (brw->upload.offset + align - 1) / align * align;
  87    if (brw->upload.bo == NULL || base + size > brw->upload.bo->size) {
  88       wrap_buffers(brw, size);
  89       base = 0;
  90    }
  91
  92    drm_intel_bo_reference(brw->upload.bo);
  93    *return_bo = brw->upload.bo;
  94    *return_offset = base;
  95
  96    delta = base - brw->upload.offset;
  97    if (brw->upload.buffer_len &&
  98        brw->upload.buffer_len + delta + size > sizeof(brw->upload.buffer)) {
  99       drm_intel_bo_subdata(brw->upload.bo,
 100                            brw->upload.buffer_offset,
 101                            brw->upload.buffer_len,
 102                            brw->upload.buffer);
 103       brw->upload.buffer_len = 0;
 104    }
 105
 106    if (size < sizeof(brw->upload.buffer)) {
 107       if (brw->upload.buffer_len == 0)
 108          brw->upload.buffer_offset = base;
 109       else
 110          brw->upload.buffer_len += delta;
 111
 112       memcpy(brw->upload.buffer + brw->upload.buffer_len, ptr, size);
 113       brw->upload.buffer_len += size;
 114    } else {
 115       drm_intel_bo_subdata(brw->upload.bo, base, size, ptr);
 116    }
 117
 118    brw->upload.offset = base + size;
 119 }
 120
 121 void *
 122 intel_upload_map(struct brw_context *brw, GLuint size, GLuint align)
 123 {
 124    GLuint base, delta;
 125    char *ptr;
 126
 127    base = (brw->upload.offset + align - 1) / align * align;
 128    if (brw->upload.bo == NULL || base + size > brw->upload.bo->size) {
 129       wrap_buffers(brw, size);
 130       base = 0;
 131    }
 132
 133    delta = base - brw->upload.offset;
 134    if (brw->upload.buffer_len &&
 135        brw->upload.buffer_len + delta + size > sizeof(brw->upload.buffer)) {
 136       drm_intel_bo_subdata(brw->upload.bo,
 137                            brw->upload.buffer_offset,
 138                            brw->upload.buffer_len,
 139                            brw->upload.buffer);
 140       brw->upload.buffer_len = 0;
 141    }
 142
 143    if (size <= sizeof(brw->upload.buffer)) {
 144       if (brw->upload.buffer_len == 0)
 145          brw->upload.buffer_offset = base;
 146       else
 147          brw->upload.buffer_len += delta;
 148
 149       ptr = brw->upload.buffer + brw->upload.buffer_len;
 150       brw->upload.buffer_len += size;
 151    } else {
 152       ptr = malloc(size);
 153    }
 154
 155    return ptr;
 156 }
 157
 158 void
 159 intel_upload_unmap(struct brw_context *brw,
 160                    const void *ptr, GLuint size, GLuint align,
 161                    drm_intel_bo **return_bo,
 162                    GLuint *return_offset)
 163 {
 164    GLuint base;
 165
 166    base = (brw->upload.offset + align - 1) / align * align;
 167    if (size > sizeof(brw->upload.buffer)) {
 168       drm_intel_bo_subdata(brw->upload.bo, base, size, ptr);
 169       free((void*)ptr);
 170    }
 171
 172    drm_intel_bo_reference(brw->upload.bo);
 173    *return_bo = brw->upload.bo;
 174    *return_offset = base;
 175
 176    brw->upload.offset = base + size;
 177 }