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 
33 struct nv04_dmaobj {
34 	struct nvkm_dmaobj base;
35 	bool clone;
36 	u32 flags0;
37 	u32 flags2;
38 };
39 
40 static int
41 nv04_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 
75 static const struct nvkm_dmaobj_func
76 nv04_dmaobj_func = {
77 	.bind = nv04_dmaobj_bind,
78 };
79 
80 int
81 nv04_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