1 /* $NetBSD: nouveau_nvkm_subdev_bar_base.c,v 1.4 2021/12/19 11:34:45 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 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bar_base.c,v 1.4 2021/12/19 11:34:45 riastradh Exp $");
28
29 #include "priv.h"
30
31 void
nvkm_bar_flush(struct nvkm_bar * bar)32 nvkm_bar_flush(struct nvkm_bar *bar)
33 {
34 if (bar && bar->func->flush)
35 bar->func->flush(bar);
36 }
37
38 struct nvkm_vmm *
nvkm_bar_bar1_vmm(struct nvkm_device * device)39 nvkm_bar_bar1_vmm(struct nvkm_device *device)
40 {
41 return device->bar->func->bar1.vmm(device->bar);
42 }
43
44 void
nvkm_bar_bar1_reset(struct nvkm_device * device)45 nvkm_bar_bar1_reset(struct nvkm_device *device)
46 {
47 struct nvkm_bar *bar = device->bar;
48 if (bar) {
49 bar->func->bar1.init(bar);
50 bar->func->bar1.wait(bar);
51 }
52 }
53
54 struct nvkm_vmm *
nvkm_bar_bar2_vmm(struct nvkm_device * device)55 nvkm_bar_bar2_vmm(struct nvkm_device *device)
56 {
57 /* Denies access to BAR2 when it's not initialised, used by INSTMEM
58 * to know when object access needs to go through the BAR0 window.
59 */
60 struct nvkm_bar *bar = device->bar;
61 if (bar && bar->bar2)
62 return bar->func->bar2.vmm(bar);
63 return NULL;
64 }
65
66 void
nvkm_bar_bar2_reset(struct nvkm_device * device)67 nvkm_bar_bar2_reset(struct nvkm_device *device)
68 {
69 struct nvkm_bar *bar = device->bar;
70 if (bar && bar->bar2) {
71 bar->func->bar2.init(bar);
72 bar->func->bar2.wait(bar);
73 }
74 }
75
76 void
nvkm_bar_bar2_fini(struct nvkm_device * device)77 nvkm_bar_bar2_fini(struct nvkm_device *device)
78 {
79 struct nvkm_bar *bar = device->bar;
80 if (bar && bar->bar2) {
81 bar->func->bar2.fini(bar);
82 bar->bar2 = false;
83 }
84 }
85
86 void
nvkm_bar_bar2_init(struct nvkm_device * device)87 nvkm_bar_bar2_init(struct nvkm_device *device)
88 {
89 struct nvkm_bar *bar = device->bar;
90 if (bar && bar->subdev.oneinit && !bar->bar2 && bar->func->bar2.init) {
91 bar->func->bar2.init(bar);
92 bar->func->bar2.wait(bar);
93 bar->bar2 = true;
94 }
95 }
96
97 static int
nvkm_bar_fini(struct nvkm_subdev * subdev,bool suspend)98 nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend)
99 {
100 struct nvkm_bar *bar = nvkm_bar(subdev);
101 if (bar->func->bar1.fini)
102 bar->func->bar1.fini(bar);
103 return 0;
104 }
105
106 static int
nvkm_bar_init(struct nvkm_subdev * subdev)107 nvkm_bar_init(struct nvkm_subdev *subdev)
108 {
109 struct nvkm_bar *bar = nvkm_bar(subdev);
110 bar->func->bar1.init(bar);
111 bar->func->bar1.wait(bar);
112 if (bar->func->init)
113 bar->func->init(bar);
114 return 0;
115 }
116
117 static int
nvkm_bar_oneinit(struct nvkm_subdev * subdev)118 nvkm_bar_oneinit(struct nvkm_subdev *subdev)
119 {
120 struct nvkm_bar *bar = nvkm_bar(subdev);
121 return bar->func->oneinit(bar);
122 }
123
124 static void *
nvkm_bar_dtor(struct nvkm_subdev * subdev)125 nvkm_bar_dtor(struct nvkm_subdev *subdev)
126 {
127 struct nvkm_bar *bar = nvkm_bar(subdev);
128 nvkm_bar_bar2_fini(subdev->device);
129 spin_lock_destroy(&bar->lock);
130 return bar->func->dtor(bar);
131 }
132
133 static const struct nvkm_subdev_func
134 nvkm_bar = {
135 .dtor = nvkm_bar_dtor,
136 .oneinit = nvkm_bar_oneinit,
137 .init = nvkm_bar_init,
138 .fini = nvkm_bar_fini,
139 };
140
141 void
nvkm_bar_ctor(const struct nvkm_bar_func * func,struct nvkm_device * device,int index,struct nvkm_bar * bar)142 nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device,
143 int index, struct nvkm_bar *bar)
144 {
145 nvkm_subdev_ctor(&nvkm_bar, device, index, &bar->subdev);
146 bar->func = func;
147 spin_lock_init(&bar->lock);
148 }
149