src/gallium/drivers/r600/r600_upload.c

   1 /*
   2  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Jerome Glisse <jglisse@redhat.com>
  25  */
  26 #include <errno.h>
  27 #include "util/u_inlines.h"
  28 #include "util/u_memory.h"
  29 #include "r600.h"
  30 #include "r600_pipe.h"
  31 #include "r600_resource.h"
  32
  33 struct r600_upload {
  34         struct r600_pipe_context        *rctx;
  35         struct r600_bo                  *buffer;
  36         char                            *ptr;
  37         unsigned                        size;
  38         unsigned                        default_size;
  39         unsigned                        total_alloc_size;
  40         unsigned                        offset;
  41         unsigned                        alignment;
  42 };
  43
  44 struct r600_upload *r600_upload_create(struct r600_pipe_context *rctx,
  45                                         unsigned default_size,
  46                                         unsigned alignment)
  47 {
  48         struct r600_upload *upload = CALLOC_STRUCT(r600_upload);
  49
  50         if (upload == NULL)
  51                 return NULL;
  52
  53         upload->rctx = rctx;
  54         upload->size = 0;
  55         upload->default_size = default_size;
  56         upload->alignment = alignment;
  57         upload->ptr = NULL;
  58         upload->buffer = NULL;
  59         upload->total_alloc_size = 0;
  60
  61         return upload;
  62 }
  63
  64 void r600_upload_flush(struct r600_upload *upload)
  65 {
  66         if (upload->buffer) {
  67                 r600_bo_reference(upload->rctx->radeon, &upload->buffer, NULL);
  68         }
  69         upload->default_size = MAX2(upload->total_alloc_size, upload->default_size);
  70         upload->total_alloc_size = 0;
  71         upload->size = 0;
  72         upload->offset = 0;
  73         upload->ptr = NULL;
  74         upload->buffer = NULL;
  75 }
  76
  77 void r600_upload_destroy(struct r600_upload *upload)
  78 {
  79         r600_upload_flush(upload);
  80         FREE(upload);
  81 }
  82
  83 int r600_upload_buffer(struct r600_upload *upload, unsigned offset,
  84                         unsigned size, struct r600_resource_buffer *in_buffer,
  85                         unsigned *out_offset, unsigned *out_size,
  86                         struct r600_bo **out_buffer)
  87 {
  88         unsigned alloc_size = align(size, upload->alignment);
  89         const void *in_ptr = NULL;
  90
  91         if (upload->offset + alloc_size > upload->size) {
  92                 if (upload->size) {
  93                         r600_bo_reference(upload->rctx->radeon, &upload->buffer, NULL);
  94                 }
  95                 upload->size = align(MAX2(upload->default_size, alloc_size), 4096);
  96                 upload->total_alloc_size += upload->size;
  97                 upload->offset = 0;
  98                 upload->buffer = r600_bo(upload->rctx->radeon, upload->size, 4096, PIPE_BIND_VERTEX_BUFFER, 0);
  99                 if (upload->buffer == NULL) {
 100                         return -ENOMEM;
 101                 }
 102                 upload->ptr = r600_bo_map(upload->rctx->radeon, upload->buffer, 0, NULL);
 103         }
 104
 105         in_ptr = in_buffer->user_buffer;
 106         memcpy(upload->ptr + upload->offset, (uint8_t *) in_ptr + offset, size);
 107         *out_offset = upload->offset;
 108         *out_size = upload->size;
 109         *out_buffer = NULL;
 110         r600_bo_reference(upload->rctx->radeon, out_buffer, upload->buffer);
 111         upload->offset += alloc_size;
 112
 113         return 0;
 114 }