// 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); }