File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c b/drivers/gpu/drm/nouveau/nv04_fence.c
new file mode 100644
index 0000000..f3d705d
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv04_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
+ */
+
+#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->base.seqno);
+ 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 nv04_nvsw_get_ref_v0 args = {};
+ WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,
+ &args, sizeof(args)));
+ return args.ref;
+}
+
+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;
+ nouveau_fence_context_free(&fctx->base);
+}
+
+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(chan, &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;
+ priv->base.contexts = 15;
+ priv->base.context_base = fence_context_alloc(priv->base.contexts);
+ return 0;
+}