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

source code of linux/drivers/gpu/drm/nouveau/nvif/mmu.c