1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24#define nv04_dmaobj(p) container_of((p), struct nv04_dmaobj, base)
25#include "user.h"
26
27#include <core/gpuobj.h>
28#include <subdev/fb.h>
29#include <subdev/mmu/vmm.h>
30
31#include <nvif/class.h>
32
33struct nv04_dmaobj {
34	struct nvkm_dmaobj base;
35	bool clone;
36	u32 flags0;
37	u32 flags2;
38};
39
40static int
41nv04_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
42		 int align, struct nvkm_gpuobj **pgpuobj)
43{
44	struct nv04_dmaobj *dmaobj = nv04_dmaobj(base);
45	struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device;
46	u64 offset = dmaobj->base.start & 0xfffff000;
47	u64 adjust = dmaobj->base.start & 0x00000fff;
48	u32 length = dmaobj->base.limit - dmaobj->base.start;
49	int ret;
50
51	if (dmaobj->clone) {
52		struct nvkm_memory *pgt =
53			device->mmu->vmm->pd->pt[0]->memory;
54		if (!dmaobj->base.start)
55			return nvkm_gpuobj_wrap(pgt, pgpuobj);
56		nvkm_kmap(pgt);
57		offset  = nvkm_ro32(pgt, 8 + (offset >> 10));
58		offset &= 0xfffff000;
59		nvkm_done(pgt);
60	}
61
62	ret = nvkm_gpuobj_new(device, 16, align, false, parent, pgpuobj);
63	if (ret == 0) {
64		nvkm_kmap(*pgpuobj);
65		nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0 | (adjust << 20));
66		nvkm_wo32(*pgpuobj, 0x04, length);
67		nvkm_wo32(*pgpuobj, 0x08, dmaobj->flags2 | offset);
68		nvkm_wo32(*pgpuobj, 0x0c, dmaobj->flags2 | offset);
69		nvkm_done(*pgpuobj);
70	}
71
72	return ret;
73}
74
75static const struct nvkm_dmaobj_func
76nv04_dmaobj_func = {
77	.bind = nv04_dmaobj_bind,
78};
79
80int
81nv04_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
82		void *data, u32 size, struct nvkm_dmaobj **pdmaobj)
83{
84	struct nvkm_device *device = dma->engine.subdev.device;
85	struct nv04_dmaobj *dmaobj;
86	int ret;
87
88	if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL)))
89		return -ENOMEM;
90	*pdmaobj = &dmaobj->base;
91
92	ret = nvkm_dmaobj_ctor(&nv04_dmaobj_func, dma, oclass,
93			       &data, &size, &dmaobj->base);
94	if (ret)
95		return ret;
96
97	if (dmaobj->base.target == NV_MEM_TARGET_VM) {
98		if (device->mmu->func == &nv04_mmu)
99			dmaobj->clone = true;
100		dmaobj->base.target = NV_MEM_TARGET_PCI;
101		dmaobj->base.access = NV_MEM_ACCESS_RW;
102	}
103
104	dmaobj->flags0 = oclass->base.oclass;
105	switch (dmaobj->base.target) {
106	case NV_MEM_TARGET_VRAM:
107		dmaobj->flags0 |= 0x00003000;
108		break;
109	case NV_MEM_TARGET_PCI:
110		dmaobj->flags0 |= 0x00023000;
111		break;
112	case NV_MEM_TARGET_PCI_NOSNOOP:
113		dmaobj->flags0 |= 0x00033000;
114		break;
115	default:
116		return -EINVAL;
117	}
118
119	switch (dmaobj->base.access) {
120	case NV_MEM_ACCESS_RO:
121		dmaobj->flags0 |= 0x00004000;
122		break;
123	case NV_MEM_ACCESS_WO:
124		dmaobj->flags0 |= 0x00008000;
125		fallthrough;
126	case NV_MEM_ACCESS_RW:
127		dmaobj->flags2 |= 0x00000002;
128		break;
129	default:
130		return -EINVAL;
131	}
132
133	return 0;
134}
135