[POWERPC] spufs: Add isolated-mode SPE recycling support

[linux-2.6-omap-h63xx.git] / arch / powerpc / platforms / cell / spufs / file.c

diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 8ca330671ad191bc4a3d680195f2dda41a45c701..5b8ba6c3aa3c9d61277d35ce5da54cf05e5b6fae 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -1343,6 +1343,37 @@ static struct file_operations spufs_mfc_fops = {
        .mmap    = spufs_mfc_mmap,
 };
 
+
+static int spufs_recycle_open(struct inode *inode, struct file *file)
+{
+       file->private_data = SPUFS_I(inode)->i_ctx;
+       return nonseekable_open(inode, file);
+}
+
+static ssize_t spufs_recycle_write(struct file *file,
+               const char __user *buffer, size_t size, loff_t *pos)
+{
+       struct spu_context *ctx = file->private_data;
+       int ret;
+
+       if (!(ctx->flags & SPU_CREATE_ISOLATE))
+               return -EINVAL;
+
+       if (size < 1)
+               return -EINVAL;
+
+       ret = spu_recycle_isolated(ctx);
+
+       if (ret)
+               return ret;
+       return size;
+}
+
+static struct file_operations spufs_recycle_fops = {
+       .open    = spufs_recycle_open,
+       .write   = spufs_recycle_write,
+};
+
 static void spufs_npc_set(void *data, u64 val)
 {
        struct spu_context *ctx = data;
@@ -1551,5 +1582,6 @@ struct tree_descr spufs_dir_nosched_contents[] = {
        { "psmap", &spufs_psmap_fops, 0666, },
        { "phys-id", &spufs_id_ops, 0666, },
        { "object-id", &spufs_object_id_ops, 0666, },
+       { "recycle", &spufs_recycle_fops, 0222, },
        {},
 };