1 | /* $NetBSD: nouveau_subdev_bar_base.c,v 1.5 2016/04/12 15:12:12 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2012 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 | * Authors: Ben Skeggs |
25 | */ |
26 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bar_base.c,v 1.5 2016/04/12 15:12:12 riastradh Exp $" ); |
29 | |
30 | #include <core/object.h> |
31 | |
32 | #include <subdev/fb.h> |
33 | #include <subdev/vm.h> |
34 | |
35 | #include "priv.h" |
36 | |
37 | struct nouveau_barobj { |
38 | struct nouveau_object base; |
39 | struct nouveau_vma vma; |
40 | #ifdef __NetBSD__ |
41 | bus_space_tag_t iomemt; |
42 | bus_space_handle_t iomemh; |
43 | #else |
44 | void __iomem *iomem; |
45 | #endif |
46 | }; |
47 | |
48 | static int |
49 | nouveau_barobj_ctor(struct nouveau_object *parent, |
50 | struct nouveau_object *engine, |
51 | struct nouveau_oclass *oclass, void *mem, u32 size, |
52 | struct nouveau_object **pobject) |
53 | { |
54 | struct nouveau_bar *bar = (void *)engine; |
55 | struct nouveau_barobj *barobj; |
56 | int ret; |
57 | |
58 | ret = nouveau_object_create(parent, engine, oclass, 0, &barobj); |
59 | *pobject = nv_object(barobj); |
60 | if (ret) |
61 | return ret; |
62 | |
63 | ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma); |
64 | if (ret) |
65 | return ret; |
66 | |
67 | #ifdef __NetBSD__ |
68 | { |
69 | /* Yes, truncation is really intended here. */ |
70 | uint32_t offset = barobj->vma.offset & 0xffffffffUL; |
71 | |
72 | KASSERTMSG(offset < bar->iomemsz, |
73 | "bar object vma exceeds range: %" PRIx32" > %" PRIxMAX, |
74 | offset, (uintmax_t)bar->iomemsz); |
75 | |
76 | barobj->iomemt = bar->iomemt; |
77 | /* XXX errno NetBSD->Linux */ |
78 | ret = -bus_space_subregion(bar->iomemt, bar->iomemh, offset, |
79 | bar->iomemsz - offset, &barobj->iomemh); |
80 | if (ret) |
81 | return ret; |
82 | } |
83 | #else |
84 | barobj->iomem = bar->iomem + (u32)barobj->vma.offset; |
85 | #endif |
86 | return 0; |
87 | } |
88 | |
89 | static void |
90 | nouveau_barobj_dtor(struct nouveau_object *object) |
91 | { |
92 | struct nouveau_bar *bar = (void *)object->engine; |
93 | struct nouveau_barobj *barobj = (void *)object; |
94 | if (barobj->vma.node) |
95 | bar->unmap(bar, &barobj->vma); |
96 | nouveau_object_destroy(&barobj->base); |
97 | } |
98 | |
99 | static u32 |
100 | nouveau_barobj_rd32(struct nouveau_object *object, u64 addr) |
101 | { |
102 | struct nouveau_barobj *barobj = (void *)object; |
103 | #ifdef __NetBSD__ |
104 | return bus_space_read_4(barobj->iomemt, barobj->iomemh, addr); |
105 | #else |
106 | return ioread32_native(barobj->iomem + addr); |
107 | #endif |
108 | } |
109 | |
110 | static void |
111 | nouveau_barobj_wr32(struct nouveau_object *object, u64 addr, u32 data) |
112 | { |
113 | struct nouveau_barobj *barobj = (void *)object; |
114 | #ifdef __NetBSD__ |
115 | bus_space_write_4(barobj->iomemt, barobj->iomemh, addr, data); |
116 | #else |
117 | iowrite32_native(data, barobj->iomem + addr); |
118 | #endif |
119 | } |
120 | |
121 | static struct nouveau_oclass |
122 | nouveau_barobj_oclass = { |
123 | .ofuncs = &(struct nouveau_ofuncs) { |
124 | .ctor = nouveau_barobj_ctor, |
125 | .dtor = nouveau_barobj_dtor, |
126 | .init = nouveau_object_init, |
127 | .fini = nouveau_object_fini, |
128 | .rd32 = nouveau_barobj_rd32, |
129 | .wr32 = nouveau_barobj_wr32, |
130 | }, |
131 | }; |
132 | |
133 | int |
134 | nouveau_bar_alloc(struct nouveau_bar *bar, struct nouveau_object *parent, |
135 | struct nouveau_mem *mem, struct nouveau_object **pobject) |
136 | { |
137 | struct nouveau_object *engine = nv_object(bar); |
138 | return nouveau_object_ctor(parent, engine, &nouveau_barobj_oclass, |
139 | mem, 0, pobject); |
140 | } |
141 | |
142 | int |
143 | nouveau_bar_create_(struct nouveau_object *parent, |
144 | struct nouveau_object *engine, |
145 | struct nouveau_oclass *oclass, int length, void **pobject) |
146 | { |
147 | struct nouveau_device *device = nv_device(parent); |
148 | struct nouveau_bar *bar; |
149 | int ret; |
150 | |
151 | ret = nouveau_subdev_create_(parent, engine, oclass, 0, "BARCTL" , |
152 | "bar" , length, pobject); |
153 | bar = *pobject; |
154 | if (ret) |
155 | return ret; |
156 | |
157 | #ifdef __NetBSD__ |
158 | if (nv_device_resource_len(device, 3) != 0) { |
159 | bar->iomemt = nv_device_resource_tag(device, 3); |
160 | bar->iomemsz = nv_device_resource_len(device, 3); |
161 | if (bus_space_map(bar->iomemt, nv_device_resource_start(device, 3), |
162 | bar->iomemsz, 0, &bar->iomemh)) |
163 | bar->iomemsz = 0; /* XXX Fail? */ |
164 | } |
165 | #else |
166 | if (nv_device_resource_len(device, 3) != 0) |
167 | bar->iomem = ioremap(nv_device_resource_start(device, 3), |
168 | nv_device_resource_len(device, 3)); |
169 | #endif |
170 | return 0; |
171 | } |
172 | |
173 | void |
174 | nouveau_bar_destroy(struct nouveau_bar *bar) |
175 | { |
176 | #ifdef __NetBSD__ |
177 | if (bar->iomemsz) |
178 | bus_space_unmap(bar->iomemt, bar->iomemh, bar->iomemsz); |
179 | #else |
180 | if (bar->iomem) |
181 | iounmap(bar->iomem); |
182 | #endif |
183 | nouveau_subdev_destroy(&bar->base); |
184 | } |
185 | |
186 | void |
187 | _nouveau_bar_dtor(struct nouveau_object *object) |
188 | { |
189 | struct nouveau_bar *bar = (void *)object; |
190 | nouveau_bar_destroy(bar); |
191 | } |
192 | |