1 /* $NetBSD: nouveau_nvif_mmu.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $ */
2
3 /*
4 * Copyright 2017 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 #include <sys/cdefs.h>
25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvif_mmu.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $");
26
27 #include <nvif/mmu.h>
28
29 #include <nvif/class.h>
30 #include <nvif/if0008.h>
31
32 void
nvif_mmu_fini(struct nvif_mmu * mmu)33 nvif_mmu_fini(struct nvif_mmu *mmu)
34 {
35 kfree(mmu->kind);
36 kfree(mmu->type);
37 kfree(mmu->heap);
38 nvif_object_fini(&mmu->object);
39 }
40
41 int
nvif_mmu_init(struct nvif_object * parent,s32 oclass,struct nvif_mmu * mmu)42 nvif_mmu_init(struct nvif_object *parent, s32 oclass, struct nvif_mmu *mmu)
43 {
44 static const struct nvif_mclass mems[] = {
45 { NVIF_CLASS_MEM_GF100, -1 },
46 { NVIF_CLASS_MEM_NV50 , -1 },
47 { NVIF_CLASS_MEM_NV04 , -1 },
48 {}
49 };
50 struct nvif_mmu_v0 args;
51 int ret, i;
52
53 args.version = 0;
54 mmu->heap = NULL;
55 mmu->type = NULL;
56 mmu->kind = NULL;
57
58 ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
59 &mmu->object);
60 if (ret)
61 goto done;
62
63 mmu->dmabits = args.dmabits;
64 mmu->heap_nr = args.heap_nr;
65 mmu->type_nr = args.type_nr;
66 mmu->kind_nr = args.kind_nr;
67
68 ret = nvif_mclass(&mmu->object, mems);
69 if (ret < 0)
70 goto done;
71 mmu->mem = mems[ret].oclass;
72
73 mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
74 GFP_KERNEL);
75 mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
76 GFP_KERNEL);
77 if (ret = -ENOMEM, !mmu->heap || !mmu->type)
78 goto done;
79
80 mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
81 GFP_KERNEL);
82 if (!mmu->kind && mmu->kind_nr)
83 goto done;
84
85 for (i = 0; i < mmu->heap_nr; i++) {
86 struct nvif_mmu_heap_v0 args = { .index = i };
87
88 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
89 &args, sizeof(args));
90 if (ret)
91 goto done;
92
93 mmu->heap[i].size = args.size;
94 }
95
96 for (i = 0; i < mmu->type_nr; i++) {
97 struct nvif_mmu_type_v0 args = { .index = i };
98
99 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
100 &args, sizeof(args));
101 if (ret)
102 goto done;
103
104 mmu->type[i].type = 0;
105 if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
106 if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
107 if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
108 if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
109 if (args.kind ) mmu->type[i].type |= NVIF_MEM_KIND;
110 if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
111 if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
112 if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
113 mmu->type[i].heap = args.heap;
114 }
115
116 if (mmu->kind_nr) {
117 struct nvif_mmu_kind_v0 *kind;
118 size_t argc = struct_size(kind, data, mmu->kind_nr);
119
120 if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
121 goto done;
122 kind->version = 0;
123 kind->count = mmu->kind_nr;
124
125 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
126 kind, argc);
127 if (ret == 0)
128 memcpy(mmu->kind, kind->data, kind->count);
129 mmu->kind_inv = kind->kind_inv;
130 kfree(kind);
131 }
132
133 done:
134 if (ret)
135 nvif_mmu_fini(mmu);
136 return ret;
137 }
138