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 #include "user.h"
25 
26 #include <core/client.h>
27 #include <core/gpuobj.h>
28 #include <subdev/fb.h>
29 
30 #include <nvif/cl0002.h>
31 #include <nvif/unpack.h>
32 
33 static const struct nvkm_object_func nvkm_dmaobj_func;
34 struct nvkm_dmaobj *
nvkm_dmaobj_search(struct nvkm_client * client,u64 handle)35 nvkm_dmaobj_search(struct nvkm_client *client, u64 handle)
36 {
37 	struct nvkm_object *object;
38 
39 	object = nvkm_object_search(client, handle, &nvkm_dmaobj_func);
40 	if (IS_ERR(object))
41 		return (void *)object;
42 
43 	return nvkm_dmaobj(object);
44 }
45 
46 static int
nvkm_dmaobj_bind(struct nvkm_object * base,struct nvkm_gpuobj * gpuobj,int align,struct nvkm_gpuobj ** pgpuobj)47 nvkm_dmaobj_bind(struct nvkm_object *base, struct nvkm_gpuobj *gpuobj,
48 		 int align, struct nvkm_gpuobj **pgpuobj)
49 {
50 	struct nvkm_dmaobj *dmaobj = nvkm_dmaobj(base);
51 	return dmaobj->func->bind(dmaobj, gpuobj, align, pgpuobj);
52 }
53 
54 static void *
nvkm_dmaobj_dtor(struct nvkm_object * base)55 nvkm_dmaobj_dtor(struct nvkm_object *base)
56 {
57 	return nvkm_dmaobj(base);
58 }
59 
60 static const struct nvkm_object_func
61 nvkm_dmaobj_func = {
62 	.dtor = nvkm_dmaobj_dtor,
63 	.bind = nvkm_dmaobj_bind,
64 };
65 
66 int
nvkm_dmaobj_ctor(const struct nvkm_dmaobj_func * func,struct nvkm_dma * dma,const struct nvkm_oclass * oclass,void ** pdata,u32 * psize,struct nvkm_dmaobj * dmaobj)67 nvkm_dmaobj_ctor(const struct nvkm_dmaobj_func *func, struct nvkm_dma *dma,
68 		 const struct nvkm_oclass *oclass, void **pdata, u32 *psize,
69 		 struct nvkm_dmaobj *dmaobj)
70 {
71 	union {
72 		struct nv_dma_v0 v0;
73 	} *args = *pdata;
74 	struct nvkm_object *parent = oclass->parent;
75 	void *data = *pdata;
76 	u32 size = *psize;
77 	int ret = -ENOSYS;
78 
79 	nvkm_object_ctor(&nvkm_dmaobj_func, oclass, &dmaobj->object);
80 	dmaobj->func = func;
81 	dmaobj->dma = dma;
82 
83 	nvif_ioctl(parent, "create dma size %d\n", *psize);
84 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
85 		nvif_ioctl(parent, "create dma vers %d target %d access %d "
86 				   "start %016llx limit %016llx\n",
87 			   args->v0.version, args->v0.target, args->v0.access,
88 			   args->v0.start, args->v0.limit);
89 		dmaobj->target = args->v0.target;
90 		dmaobj->access = args->v0.access;
91 		dmaobj->start  = args->v0.start;
92 		dmaobj->limit  = args->v0.limit;
93 	} else
94 		return ret;
95 
96 	*pdata = data;
97 	*psize = size;
98 
99 	if (dmaobj->start > dmaobj->limit)
100 		return -EINVAL;
101 
102 	switch (dmaobj->target) {
103 	case NV_DMA_V0_TARGET_VM:
104 		dmaobj->target = NV_MEM_TARGET_VM;
105 		break;
106 	case NV_DMA_V0_TARGET_VRAM:
107 		dmaobj->target = NV_MEM_TARGET_VRAM;
108 		break;
109 	case NV_DMA_V0_TARGET_PCI:
110 		dmaobj->target = NV_MEM_TARGET_PCI;
111 		break;
112 	case NV_DMA_V0_TARGET_PCI_US:
113 	case NV_DMA_V0_TARGET_AGP:
114 		dmaobj->target = NV_MEM_TARGET_PCI_NOSNOOP;
115 		break;
116 	default:
117 		return -EINVAL;
118 	}
119 
120 	switch (dmaobj->access) {
121 	case NV_DMA_V0_ACCESS_VM:
122 		dmaobj->access = NV_MEM_ACCESS_VM;
123 		break;
124 	case NV_DMA_V0_ACCESS_RD:
125 		dmaobj->access = NV_MEM_ACCESS_RO;
126 		break;
127 	case NV_DMA_V0_ACCESS_WR:
128 		dmaobj->access = NV_MEM_ACCESS_WO;
129 		break;
130 	case NV_DMA_V0_ACCESS_RDWR:
131 		dmaobj->access = NV_MEM_ACCESS_RW;
132 		break;
133 	default:
134 		return -EINVAL;
135 	}
136 
137 	return ret;
138 }
139