diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/gang.c')
-rw-r--r-- | arch/powerpc/platforms/cell/spufs/gang.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/gang.c b/arch/powerpc/platforms/cell/spufs/gang.c new file mode 100644 index 0000000000..827d338dea --- /dev/null +++ b/arch/powerpc/platforms/cell/spufs/gang.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SPU file system + * + * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 + * + * Author: Arnd Bergmann <arndb@de.ibm.com> + */ + +#include <linux/list.h> +#include <linux/slab.h> + +#include "spufs.h" + +struct spu_gang *alloc_spu_gang(void) +{ + struct spu_gang *gang; + + gang = kzalloc(sizeof *gang, GFP_KERNEL); + if (!gang) + goto out; + + kref_init(&gang->kref); + mutex_init(&gang->mutex); + mutex_init(&gang->aff_mutex); + INIT_LIST_HEAD(&gang->list); + INIT_LIST_HEAD(&gang->aff_list_head); + +out: + return gang; +} + +static void destroy_spu_gang(struct kref *kref) +{ + struct spu_gang *gang; + gang = container_of(kref, struct spu_gang, kref); + WARN_ON(gang->contexts || !list_empty(&gang->list)); + kfree(gang); +} + +struct spu_gang *get_spu_gang(struct spu_gang *gang) +{ + kref_get(&gang->kref); + return gang; +} + +int put_spu_gang(struct spu_gang *gang) +{ + return kref_put(&gang->kref, &destroy_spu_gang); +} + +void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx) +{ + mutex_lock(&gang->mutex); + ctx->gang = get_spu_gang(gang); + list_add(&ctx->gang_list, &gang->list); + gang->contexts++; + mutex_unlock(&gang->mutex); +} + +void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx) +{ + mutex_lock(&gang->mutex); + WARN_ON(ctx->gang != gang); + if (!list_empty(&ctx->aff_list)) { + list_del_init(&ctx->aff_list); + gang->aff_flags &= ~AFF_OFFSETS_SET; + } + list_del_init(&ctx->gang_list); + gang->contexts--; + mutex_unlock(&gang->mutex); + + put_spu_gang(gang); +} |