1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c
new file mode 100644
index 000000000..179167484
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c
@@ -0,0 +1,83 @@
+/*
+ * 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 "nv31.h"
+
+#include <subdev/instmem.h>
+
+#include <nvif/class.h>
+
+bool
+nv40_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
+{
+	struct nvkm_instmem *imem = device->imem;
+	struct nv31_mpeg *mpeg = nv31_mpeg(device->mpeg);
+	struct nvkm_subdev *subdev = &mpeg->engine.subdev;
+	u32 inst = data << 4;
+	u32 dma0 = nvkm_instmem_rd32(imem, inst + 0);
+	u32 dma1 = nvkm_instmem_rd32(imem, inst + 4);
+	u32 dma2 = nvkm_instmem_rd32(imem, inst + 8);
+	u32 base = (dma2 & 0xfffff000) | (dma0 >> 20);
+	u32 size = dma1 + 1;
+
+	/* only allow linear DMA objects */
+	if (!(dma0 & 0x00002000)) {
+		nvkm_error(subdev, "inst %08x dma0 %08x dma1 %08x dma2 %08x\n",
+			   inst, dma0, dma1, dma2);
+		return false;
+	}
+
+	if (mthd == 0x0190) {
+		/* DMA_CMD */
+		nvkm_mask(device, 0x00b300, 0x00030000, (dma0 & 0x00030000));
+		nvkm_wr32(device, 0x00b334, base);
+		nvkm_wr32(device, 0x00b324, size);
+	} else
+	if (mthd == 0x01a0) {
+		/* DMA_DATA */
+		nvkm_mask(device, 0x00b300, 0x000c0000, (dma0 & 0x00030000) << 2);
+		nvkm_wr32(device, 0x00b360, base);
+		nvkm_wr32(device, 0x00b364, size);
+	} else {
+		/* DMA_IMAGE, VRAM only */
+		if (dma0 & 0x00030000)
+			return false;
+
+		nvkm_wr32(device, 0x00b370, base);
+		nvkm_wr32(device, 0x00b374, size);
+	}
+
+	return true;
+}
+
+static const struct nv31_mpeg_func
+nv40_mpeg = {
+	.mthd_dma = nv40_mpeg_mthd_dma,
+};
+
+int
+nv40_mpeg_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+	      struct nvkm_engine **pmpeg)
+{
+	return nv31_mpeg_new_(&nv40_mpeg, device, type, inst, pmpeg);
+}