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/*
* Copyright (C) 2009-2010 Francisco Jerez.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "nouveau_driver.h"
#include "nouveau_context.h"
/*
* Returns a pointer to a chunk of 'size' bytes long GART memory. 'bo'
* and 'offset' will point to the returned memory.
*/
void *
nouveau_get_scratch(struct gl_context *ctx, unsigned size,
struct nouveau_bo **bo, unsigned *offset)
{
struct nouveau_scratch_state *scratch =
&to_nouveau_context(ctx)->scratch;
void *buf;
if (scratch->buf && size <= NOUVEAU_SCRATCH_SIZE - scratch->offset) {
nouveau_bo_ref(scratch->bo[scratch->index], bo);
buf = scratch->buf + scratch->offset;
*offset = scratch->offset;
scratch->offset += size;
} else if (size <= NOUVEAU_SCRATCH_SIZE) {
scratch->index = (scratch->index + 1) % NOUVEAU_SCRATCH_COUNT;
nouveau_bo_ref(scratch->bo[scratch->index], bo);
nouveau_bo_map(*bo, NOUVEAU_BO_WR);
buf = scratch->buf = (*bo)->map;
nouveau_bo_unmap(*bo);
*offset = 0;
scratch->offset = size;
} else {
nouveau_bo_new(context_dev(ctx),
NOUVEAU_BO_MAP | NOUVEAU_BO_GART, 0, size, bo);
nouveau_bo_map(*bo, NOUVEAU_BO_WR);
buf = (*bo)->map;
nouveau_bo_unmap(*bo);
*offset = 0;
}
return buf;
}
void
nouveau_scratch_init(struct gl_context *ctx)
{
struct nouveau_scratch_state *scratch =
&to_nouveau_context(ctx)->scratch;
int ret, i;
for (i = 0; i < NOUVEAU_SCRATCH_COUNT; i++) {
ret = nouveau_bo_new(context_dev(ctx),
NOUVEAU_BO_MAP | NOUVEAU_BO_GART,
0, NOUVEAU_SCRATCH_SIZE, &scratch->bo[i]);
assert(!ret);
}
}
void
nouveau_scratch_destroy(struct gl_context *ctx)
{
struct nouveau_scratch_state *scratch =
&to_nouveau_context(ctx)->scratch;
int i;
for (i = 0; i < NOUVEAU_SCRATCH_COUNT; i++)
nouveau_bo_ref(NULL, &scratch->bo[i]);
}
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