diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/platforms/cell/spufs/gang.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/powerpc/platforms/cell/spufs/gang.c')
-rw-r--r-- | kernel/arch/powerpc/platforms/cell/spufs/gang.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/platforms/cell/spufs/gang.c b/kernel/arch/powerpc/platforms/cell/spufs/gang.c new file mode 100644 index 000000000..71a443253 --- /dev/null +++ b/kernel/arch/powerpc/platforms/cell/spufs/gang.c @@ -0,0 +1,87 @@ +/* + * SPU file system + * + * (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/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); +} |