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>

1 files changed, 113 insertions, 0 deletions

diff --git a/kernel/drivers/gpu/drm/nouveau/nv10_fence.c b/kernel/drivers/gpu/drm/nouveau/nv10_fence.c
new file mode 100644
index 000000000..5e1ea1cdc
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nv10_fence.c
@@ -0,0 +1,113 @@
+/*
+ * 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 <bskeggs@redhat.com>
+ */
+
+#include "nouveau_drm.h"
+#include "nouveau_dma.h"
+#include "nv10_fence.h"
+
+int
+nv10_fence_emit(struct nouveau_fence *fence)
+{
+	struct nouveau_channel *chan = fence->channel;
+	int ret = RING_SPACE(chan, 2);
+	if (ret == 0) {
+		BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
+		OUT_RING  (chan, fence->base.seqno);
+		FIRE_RING (chan);
+	}
+	return ret;
+}
+
+
+static int
+nv10_fence_sync(struct nouveau_fence *fence,
+		struct nouveau_channel *prev, struct nouveau_channel *chan)
+{
+	return -ENODEV;
+}
+
+u32
+nv10_fence_read(struct nouveau_channel *chan)
+{
+	return nvif_rd32(chan, 0x0048);
+}
+
+void
+nv10_fence_context_del(struct nouveau_channel *chan)
+{
+	struct nv10_fence_chan *fctx = chan->fence;
+	int i;
+	nouveau_fence_context_del(&fctx->base);
+	for (i = 0; i < ARRAY_SIZE(fctx->head); i++)
+		nvif_object_fini(&fctx->head[i]);
+	nvif_object_fini(&fctx->sema);
+	chan->fence = NULL;
+	nouveau_fence_context_free(&fctx->base);
+}
+
+int
+nv10_fence_context_new(struct nouveau_channel *chan)
+{
+	struct nv10_fence_chan *fctx;
+
+	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
+	if (!fctx)
+		return -ENOMEM;
+
+	nouveau_fence_context_new(chan, &fctx->base);
+	fctx->base.emit = nv10_fence_emit;
+	fctx->base.read = nv10_fence_read;
+	fctx->base.sync = nv10_fence_sync;
+	return 0;
+}
+
+void
+nv10_fence_destroy(struct nouveau_drm *drm)
+{
+	struct nv10_fence_priv *priv = drm->fence;
+	nouveau_bo_unmap(priv->bo);
+	if (priv->bo)
+		nouveau_bo_unpin(priv->bo);
+	nouveau_bo_ref(NULL, &priv->bo);
+	drm->fence = NULL;
+	kfree(priv);
+}
+
+int
+nv10_fence_create(struct nouveau_drm *drm)
+{
+	struct nv10_fence_priv *priv;
+
+	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->base.dtor = nv10_fence_destroy;
+	priv->base.context_new = nv10_fence_context_new;
+	priv->base.context_del = nv10_fence_context_del;
+	priv->base.contexts = 31;
+	priv->base.context_base = fence_context_alloc(priv->base.contexts);
+	spin_lock_init(&priv->lock);
+	return 0;
+}