1/*	$NetBSD: nouveau_nvkm_engine_mpeg_nv40.c,v 1.3 2021/12/18 23:45:36 riastradh Exp $	*/
2
3/*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26#include <sys/cdefs.h>
27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_mpeg_nv40.c,v 1.3 2021/12/18 23:45:36 riastradh Exp $");
28
29#include "nv31.h"
30
31#include <subdev/instmem.h>
32
33#include <nvif/class.h>
34
35bool
36nv40_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
37{
38	struct nvkm_instmem *imem = device->imem;
39	struct nv31_mpeg *mpeg = nv31_mpeg(device->mpeg);
40	struct nvkm_subdev *subdev = &mpeg->engine.subdev;
41	u32 inst = data << 4;
42	u32 dma0 = nvkm_instmem_rd32(imem, inst + 0);
43	u32 dma1 = nvkm_instmem_rd32(imem, inst + 4);
44	u32 dma2 = nvkm_instmem_rd32(imem, inst + 8);
45	u32 base = (dma2 & 0xfffff000) | (dma0 >> 20);
46	u32 size = dma1 + 1;
47
48	/* only allow linear DMA objects */
49	if (!(dma0 & 0x00002000)) {
50		nvkm_error(subdev, "inst %08x dma0 %08x dma1 %08x dma2 %08x\n",
51			   inst, dma0, dma1, dma2);
52		return false;
53	}
54
55	if (mthd == 0x0190) {
56		/* DMA_CMD */
57		nvkm_mask(device, 0x00b300, 0x00030000, (dma0 & 0x00030000));
58		nvkm_wr32(device, 0x00b334, base);
59		nvkm_wr32(device, 0x00b324, size);
60	} else
61	if (mthd == 0x01a0) {
62		/* DMA_DATA */
63		nvkm_mask(device, 0x00b300, 0x000c0000, (dma0 & 0x00030000) << 2);
64		nvkm_wr32(device, 0x00b360, base);
65		nvkm_wr32(device, 0x00b364, size);
66	} else {
67		/* DMA_IMAGE, VRAM only */
68		if (dma0 & 0x00030000)
69			return false;
70
71		nvkm_wr32(device, 0x00b370, base);
72		nvkm_wr32(device, 0x00b374, size);
73	}
74
75	return true;
76}
77
78static const struct nv31_mpeg_func
79nv40_mpeg = {
80	.mthd_dma = nv40_mpeg_mthd_dma,
81};
82
83int
84nv40_mpeg_new(struct nvkm_device *device, int index, struct nvkm_engine **pmpeg)
85{
86	return nv31_mpeg_new_(&nv40_mpeg, device, index, pmpeg);
87}
88