2 * Copyright (C) 2009-2010 Francisco Jerez.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #include "nouveau_driver.h"
28 #include "nouveau_context.h"
31 * Returns a pointer to a chunk of 'size' bytes long GART memory. 'bo'
32 * and 'offset' will point to the returned memory.
35 nouveau_get_scratch(struct gl_context
*ctx
, unsigned size
,
36 struct nouveau_bo
**bo
, unsigned *offset
)
38 struct nouveau_client
*client
= context_client(ctx
);
39 struct nouveau_scratch_state
*scratch
=
40 &to_nouveau_context(ctx
)->scratch
;
43 if (scratch
->buf
&& size
<= NOUVEAU_SCRATCH_SIZE
- scratch
->offset
) {
44 nouveau_bo_ref(scratch
->bo
[scratch
->index
], bo
);
46 buf
= scratch
->buf
+ scratch
->offset
;
47 *offset
= scratch
->offset
;
48 scratch
->offset
+= size
;
50 } else if (size
<= NOUVEAU_SCRATCH_SIZE
) {
51 scratch
->index
= (scratch
->index
+ 1) % NOUVEAU_SCRATCH_COUNT
;
52 nouveau_bo_ref(scratch
->bo
[scratch
->index
], bo
);
54 nouveau_bo_map(*bo
, NOUVEAU_BO_WR
, client
);
55 buf
= scratch
->buf
= (*bo
)->map
;
58 scratch
->offset
= size
;
61 nouveau_bo_new(context_dev(ctx
), NOUVEAU_BO_GART
|
62 NOUVEAU_BO_MAP
, 0, size
, NULL
, bo
);
64 nouveau_bo_map(*bo
, NOUVEAU_BO_WR
, client
);
74 nouveau_scratch_init(struct gl_context
*ctx
)
76 struct nouveau_scratch_state
*scratch
=
77 &to_nouveau_context(ctx
)->scratch
;
80 for (i
= 0; i
< NOUVEAU_SCRATCH_COUNT
; i
++) {
81 ret
= nouveau_bo_new(context_dev(ctx
), NOUVEAU_BO_GART
|
82 NOUVEAU_BO_MAP
, 0, NOUVEAU_SCRATCH_SIZE
,
83 NULL
, &scratch
->bo
[i
]);
89 nouveau_scratch_destroy(struct gl_context
*ctx
)
91 struct nouveau_scratch_state
*scratch
=
92 &to_nouveau_context(ctx
)->scratch
;
95 for (i
= 0; i
< NOUVEAU_SCRATCH_COUNT
; i
++)
96 nouveau_bo_ref(NULL
, &scratch
->bo
[i
]);