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