xref: /openbmc/linux/drivers/gpu/drm/nouveau/nvif/mmu.c (revision b830f94f)
1 /*
2  * Copyright 2017 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 #include <nvif/mmu.h>
23 
24 #include <nvif/class.h>
25 #include <nvif/if0008.h>
26 
27 void
28 nvif_mmu_fini(struct nvif_mmu *mmu)
29 {
30 	kfree(mmu->kind);
31 	kfree(mmu->type);
32 	kfree(mmu->heap);
33 	nvif_object_fini(&mmu->object);
34 }
35 
36 int
37 nvif_mmu_init(struct nvif_object *parent, s32 oclass, struct nvif_mmu *mmu)
38 {
39 	static const struct nvif_mclass mems[] = {
40 		{ NVIF_CLASS_MEM_GF100, -1 },
41 		{ NVIF_CLASS_MEM_NV50 , -1 },
42 		{ NVIF_CLASS_MEM_NV04 , -1 },
43 		{}
44 	};
45 	struct nvif_mmu_v0 args;
46 	int ret, i;
47 
48 	args.version = 0;
49 	mmu->heap = NULL;
50 	mmu->type = NULL;
51 	mmu->kind = NULL;
52 
53 	ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
54 			       &mmu->object);
55 	if (ret)
56 		goto done;
57 
58 	mmu->dmabits = args.dmabits;
59 	mmu->heap_nr = args.heap_nr;
60 	mmu->type_nr = args.type_nr;
61 	mmu->kind_nr = args.kind_nr;
62 
63 	ret = nvif_mclass(&mmu->object, mems);
64 	if (ret < 0)
65 		goto done;
66 	mmu->mem = mems[ret].oclass;
67 
68 	mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
69 				  GFP_KERNEL);
70 	mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
71 				  GFP_KERNEL);
72 	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
73 		goto done;
74 
75 	mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
76 				  GFP_KERNEL);
77 	if (!mmu->kind && mmu->kind_nr)
78 		goto done;
79 
80 	for (i = 0; i < mmu->heap_nr; i++) {
81 		struct nvif_mmu_heap_v0 args = { .index = i };
82 
83 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
84 				       &args, sizeof(args));
85 		if (ret)
86 			goto done;
87 
88 		mmu->heap[i].size = args.size;
89 	}
90 
91 	for (i = 0; i < mmu->type_nr; i++) {
92 		struct nvif_mmu_type_v0 args = { .index = i };
93 
94 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
95 				       &args, sizeof(args));
96 		if (ret)
97 			goto done;
98 
99 		mmu->type[i].type = 0;
100 		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
101 		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
102 		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
103 		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
104 		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
105 		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
106 		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
107 		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
108 		mmu->type[i].heap = args.heap;
109 	}
110 
111 	if (mmu->kind_nr) {
112 		struct nvif_mmu_kind_v0 *kind;
113 		u32 argc = sizeof(*kind) + sizeof(*kind->data) * mmu->kind_nr;
114 
115 		if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
116 			goto done;
117 		kind->version = 0;
118 		kind->count = mmu->kind_nr;
119 
120 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
121 				       kind, argc);
122 		if (ret == 0)
123 			memcpy(mmu->kind, kind->data, kind->count);
124 		kfree(kind);
125 	}
126 
127 done:
128 	if (ret)
129 		nvif_mmu_fini(mmu);
130 	return ret;
131 }
132