1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvif/chan506f.c b/drivers/gpu/drm/nouveau/nvif/chan506f.c
new file mode 100644
index 000000000000..d3900887c4a7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvif/chan506f.c
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+ */
+#include <nvif/chan.h>
+
+void
+nvif_chan506f_gpfifo_kick(struct nvif_chan *chan)
+{
+	wmb();
+	nvif_wr32(&chan->userd, 0x8c, chan->gpfifo.cur);
+}
+
+void
+nvif_chan506f_gpfifo_push(struct nvif_chan *chan, bool main, u64 addr, u32 size, bool no_prefetch)
+{
+	u32 gpptr = chan->gpfifo.cur << 3;
+
+	if (WARN_ON(!chan->gpfifo.free))
+		return;
+
+	nvif_wr32(&chan->gpfifo, gpptr + 0, lower_32_bits(addr));
+	nvif_wr32(&chan->gpfifo, gpptr + 4, upper_32_bits(addr) |
+					    (main ? 0 : BIT(9)) |
+					    (size >> 2) << 10 |
+					    (no_prefetch ? BIT(31) : 0));
+
+	chan->gpfifo.cur = (chan->gpfifo.cur + 1) & chan->gpfifo.max;
+	chan->gpfifo.free--;
+	if (!chan->gpfifo.free)
+		chan->push.end = chan->push.cur;
+}
+
+static u32
+nvif_chan506f_gpfifo_read_get(struct nvif_chan *chan)
+{
+	return nvif_rd32(&chan->userd, 0x88);
+}
+
+static u32
+nvif_chan506f_read_get(struct nvif_chan *chan)
+{
+	u32 tlgetlo = nvif_rd32(&chan->userd, 0x58);
+	u32 tlgethi = nvif_rd32(&chan->userd, 0x5c);
+	struct nvif_push *push = &chan->push;
+
+	/* Update cached GET pointer if TOP_LEVEL_GET is valid. */
+	if (tlgethi & BIT(31)) {
+		u64 tlget = ((u64)(tlgethi & 0xff) << 32) | tlgetlo;
+
+		push->hw.get = (tlget - push->addr) >> 2;
+	}
+
+	return push->hw.get;
+}
+
+static const struct nvif_chan_func
+nvif_chan506f = {
+	.push.read_get = nvif_chan506f_read_get,
+	.gpfifo.read_get = nvif_chan506f_gpfifo_read_get,
+	.gpfifo.push = nvif_chan506f_gpfifo_push,
+	.gpfifo.kick = nvif_chan506f_gpfifo_kick,
+};
+
+int
+nvif_chan506f_ctor(struct nvif_chan *chan, void *userd, void *gpfifo, u32 gpfifo_size,
+		   void *push, u64 push_addr, u32 push_size)
+{
+	nvif_chan_gpfifo_ctor(&nvif_chan506f, userd, gpfifo, gpfifo_size,
+			      push, push_addr, push_size, chan);
+	return 0;
+}