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74 lines
1.5 KiB
74 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SPU file system |
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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 <[email protected]> |
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*/ |
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#include <linux/list.h> |
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#include <linux/slab.h> |
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#include "spufs.h" |
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struct spu_gang *alloc_spu_gang(void) |
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{ |
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struct spu_gang *gang; |
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gang = kzalloc(sizeof *gang, GFP_KERNEL); |
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if (!gang) |
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goto out; |
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kref_init(&gang->kref); |
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mutex_init(&gang->mutex); |
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mutex_init(&gang->aff_mutex); |
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INIT_LIST_HEAD(&gang->list); |
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INIT_LIST_HEAD(&gang->aff_list_head); |
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out: |
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return gang; |
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} |
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static void destroy_spu_gang(struct kref *kref) |
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{ |
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struct spu_gang *gang; |
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gang = container_of(kref, struct spu_gang, kref); |
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WARN_ON(gang->contexts || !list_empty(&gang->list)); |
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kfree(gang); |
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} |
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struct spu_gang *get_spu_gang(struct spu_gang *gang) |
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{ |
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kref_get(&gang->kref); |
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return gang; |
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} |
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int put_spu_gang(struct spu_gang *gang) |
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{ |
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return kref_put(&gang->kref, &destroy_spu_gang); |
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} |
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void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx) |
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{ |
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mutex_lock(&gang->mutex); |
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ctx->gang = get_spu_gang(gang); |
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list_add(&ctx->gang_list, &gang->list); |
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gang->contexts++; |
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mutex_unlock(&gang->mutex); |
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} |
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void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx) |
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{ |
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mutex_lock(&gang->mutex); |
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WARN_ON(ctx->gang != gang); |
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if (!list_empty(&ctx->aff_list)) { |
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list_del_init(&ctx->aff_list); |
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gang->aff_flags &= ~AFF_OFFSETS_SET; |
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} |
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list_del_init(&ctx->gang_list); |
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gang->contexts--; |
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mutex_unlock(&gang->mutex); |
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put_spu_gang(gang); |
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}
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