1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c b/drivers/gpu/drm/nouveau/nv04_fence.c
new file mode 100644
index 0000000..94eadd1
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv04_fence.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include <engine/fifo.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_dma.h"
+#include "nouveau_fence.h"
+
+struct nv04_fence_chan {
+	struct nouveau_fence_chan base;
+};
+
+struct nv04_fence_priv {
+	struct nouveau_fence_priv base;
+};
+
+static int
+nv04_fence_emit(struct nouveau_fence *fence)
+{
+	struct nouveau_channel *chan = fence->channel;
+	int ret = RING_SPACE(chan, 2);
+	if (ret == 0) {
+		BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
+		OUT_RING  (chan, fence->sequence);
+		FIRE_RING (chan);
+	}
+	return ret;
+}
+
+static int
+nv04_fence_sync(struct nouveau_fence *fence,
+		struct nouveau_channel *prev, struct nouveau_channel *chan)
+{
+	return -ENODEV;
+}
+
+static u32
+nv04_fence_read(struct nouveau_channel *chan)
+{
+	struct nouveau_fifo_chan *fifo = (void *)chan->object;
+	return atomic_read(&fifo->refcnt);
+}
+
+static void
+nv04_fence_context_del(struct nouveau_channel *chan)
+{
+	struct nv04_fence_chan *fctx = chan->fence;
+	nouveau_fence_context_del(&fctx->base);
+	chan->fence = NULL;
+	kfree(fctx);
+}
+
+static int
+nv04_fence_context_new(struct nouveau_channel *chan)
+{
+	struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
+	if (fctx) {
+		nouveau_fence_context_new(&fctx->base);
+		fctx->base.emit = nv04_fence_emit;
+		fctx->base.sync = nv04_fence_sync;
+		fctx->base.read = nv04_fence_read;
+		chan->fence = fctx;
+		return 0;
+	}
+	return -ENOMEM;
+}
+
+static void
+nv04_fence_destroy(struct nouveau_drm *drm)
+{
+	struct nv04_fence_priv *priv = drm->fence;
+	drm->fence = NULL;
+	kfree(priv);
+}
+
+int
+nv04_fence_create(struct nouveau_drm *drm)
+{
+	struct nv04_fence_priv *priv;
+
+	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base.dtor = nv04_fence_destroy;
+	priv->base.context_new = nv04_fence_context_new;
+	priv->base.context_del = nv04_fence_context_del;
+	return 0;
+}