68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
|
|
* SPU file system -- SPU context management
|
|
*
|
|
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
|
|
*
|
|
* Author: Arnd Bergmann <arndb@de.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <asm/spu.h>
|
|
#include "spufs.h"
|
|
|
|
struct spu_context *alloc_spu_context(void)
|
|
{
|
|
struct spu_context *ctx;
|
|
ctx = kmalloc(sizeof *ctx, GFP_KERNEL);
|
|
if (!ctx)
|
|
goto out;
|
|
ctx->spu = spu_alloc();
|
|
if (!ctx->spu)
|
|
goto out_free;
|
|
init_rwsem(&ctx->backing_sema);
|
|
spin_lock_init(&ctx->mmio_lock);
|
|
kref_init(&ctx->kref);
|
|
goto out;
|
|
out_free:
|
|
kfree(ctx);
|
|
ctx = NULL;
|
|
out:
|
|
return ctx;
|
|
}
|
|
|
|
void destroy_spu_context(struct kref *kref)
|
|
{
|
|
struct spu_context *ctx;
|
|
ctx = container_of(kref, struct spu_context, kref);
|
|
if (ctx->spu)
|
|
spu_free(ctx->spu);
|
|
kfree(ctx);
|
|
}
|
|
|
|
struct spu_context * get_spu_context(struct spu_context *ctx)
|
|
{
|
|
kref_get(&ctx->kref);
|
|
return ctx;
|
|
}
|
|
|
|
int put_spu_context(struct spu_context *ctx)
|
|
{
|
|
return kref_put(&ctx->kref, &destroy_spu_context);
|
|
}
|
|
|
|
|