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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 | */ | |
5b85057a | 24 | #include "priv.h" |
ebb945a9 | 25 | |
4acfd707 | 26 | #include <core/client.h> |
8f0649b5 | 27 | #include <engine/fifo.h> |
ebb945a9 | 28 | |
0710cc31 BS |
29 | #include <nvif/class.h> |
30 | ||
31 | struct nvkm_dmaobj * | |
32 | nvkm_dma_search(struct nvkm_dma *dma, struct nvkm_client *client, u64 object) | |
33 | { | |
34 | struct rb_node *node = client->dmaroot.rb_node; | |
35 | while (node) { | |
36 | struct nvkm_dmaobj *dmaobj = | |
37 | container_of(node, typeof(*dmaobj), rb); | |
38 | if (object < dmaobj->handle) | |
39 | node = node->rb_left; | |
40 | else | |
41 | if (object > dmaobj->handle) | |
42 | node = node->rb_right; | |
43 | else | |
44 | return dmaobj; | |
45 | } | |
46 | return NULL; | |
47 | } | |
48 | ||
49 | static int | |
50 | nvkm_dma_oclass_new(struct nvkm_device *device, | |
51 | const struct nvkm_oclass *oclass, void *data, u32 size, | |
52 | struct nvkm_object **pobject) | |
53 | { | |
54 | struct nvkm_dma *dma = nvkm_dma(oclass->engine); | |
0710cc31 BS |
55 | struct nvkm_dmaobj *dmaobj = NULL; |
56 | struct nvkm_client *client = oclass->client; | |
57 | struct rb_node **ptr = &client->dmaroot.rb_node; | |
58 | struct rb_node *parent = NULL; | |
59 | int ret; | |
60 | ||
bd70563f | 61 | ret = dma->func->class_new(dma, oclass, data, size, &dmaobj); |
0710cc31 BS |
62 | if (dmaobj) |
63 | *pobject = &dmaobj->object; | |
64 | if (ret) | |
65 | return ret; | |
66 | ||
67 | dmaobj->handle = oclass->object; | |
68 | ||
69 | while (*ptr) { | |
70 | struct nvkm_dmaobj *obj = container_of(*ptr, typeof(*obj), rb); | |
71 | parent = *ptr; | |
72 | if (dmaobj->handle < obj->handle) | |
73 | ptr = &parent->rb_left; | |
74 | else | |
75 | if (dmaobj->handle > obj->handle) | |
76 | ptr = &parent->rb_right; | |
77 | else | |
78 | return -EEXIST; | |
79 | } | |
80 | ||
81 | rb_link_node(&dmaobj->rb, parent, ptr); | |
82 | rb_insert_color(&dmaobj->rb, &client->dmaroot); | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static const struct nvkm_device_oclass | |
87 | nvkm_dma_oclass_base = { | |
88 | .ctor = nvkm_dma_oclass_new, | |
f027f491 BS |
89 | }; |
90 | ||
8f0649b5 BS |
91 | static int |
92 | nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size, | |
93 | struct nvkm_object **pobject) | |
94 | { | |
95 | return nvkm_dma_oclass_new(oclass->engine->subdev.device, | |
96 | oclass, data, size, pobject); | |
97 | } | |
98 | ||
0710cc31 BS |
99 | static const struct nvkm_sclass |
100 | nvkm_dma_sclass[] = { | |
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101 | { 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, |
102 | { 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, | |
103 | { 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, | |
0710cc31 BS |
104 | }; |
105 | ||
106 | static int | |
107 | nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index, | |
108 | const struct nvkm_device_oclass **class) | |
f027f491 | 109 | { |
0710cc31 BS |
110 | const int count = ARRAY_SIZE(nvkm_dma_sclass); |
111 | if (index < count) { | |
112 | const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index]; | |
113 | sclass->base = oclass[0]; | |
114 | sclass->engn = oclass; | |
115 | *class = &nvkm_dma_oclass_base; | |
116 | return index; | |
117 | } | |
118 | return count; | |
f027f491 BS |
119 | } |
120 | ||
f86770aa | 121 | static int |
8f0649b5 | 122 | nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index) |
0710cc31 | 123 | { |
8f0649b5 BS |
124 | const int count = ARRAY_SIZE(nvkm_dma_sclass); |
125 | if (index < count) { | |
126 | oclass->base = nvkm_dma_sclass[index]; | |
127 | return index; | |
128 | } | |
129 | return count; | |
0710cc31 | 130 | } |
f027f491 | 131 | |
bd70563f BS |
132 | static void * |
133 | nvkm_dma_dtor(struct nvkm_engine *engine) | |
134 | { | |
135 | return nvkm_dma(engine); | |
136 | } | |
137 | ||
8f0649b5 BS |
138 | static const struct nvkm_engine_func |
139 | nvkm_dma = { | |
bd70563f | 140 | .dtor = nvkm_dma_dtor, |
8f0649b5 BS |
141 | .base.sclass = nvkm_dma_oclass_base_get, |
142 | .fifo.sclass = nvkm_dma_oclass_fifo_get, | |
0710cc31 | 143 | }; |
b2c81703 BS |
144 | |
145 | int | |
bd70563f BS |
146 | nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device, |
147 | int index, struct nvkm_dma **pdma) | |
bc98540b | 148 | { |
bd70563f | 149 | struct nvkm_dma *dma; |
bc98540b | 150 | |
bd70563f BS |
151 | if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL))) |
152 | return -ENOMEM; | |
153 | dma->func = func; | |
bc98540b | 154 | |
bd70563f BS |
155 | return nvkm_engine_ctor(&nvkm_dma, device, index, |
156 | 0, true, &dma->engine); | |
bc98540b | 157 | } |