This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / platforms / cell / spufs / gang.c

diff --git a/arch/powerpc/platforms/cell/spufs/gang.c b/arch/powerpc/platforms/cell/spufs/gang.c
new file mode 100644 (file)
index 0000000..212ea78
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/gang.c
@@ -0,0 +1,81 @@
+/*
+ * 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);
+       INIT_LIST_HEAD(&gang->list);
+
+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);
+       list_del_init(&ctx->gang_list);
+       gang->contexts--;
+       mutex_unlock(&gang->mutex);
+
+       put_spu_gang(gang);
+}