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 */
24 #include "priv.h"
25
26 void
nvkm_bar_flush(struct nvkm_bar * bar)27 nvkm_bar_flush(struct nvkm_bar *bar)
28 {
29 if (bar && bar->func->flush)
30 bar->func->flush(bar);
31 }
32
33 struct nvkm_vmm *
nvkm_bar_bar1_vmm(struct nvkm_device * device)34 nvkm_bar_bar1_vmm(struct nvkm_device *device)
35 {
36 return device->bar->func->bar1.vmm(device->bar);
37 }
38
39 void
nvkm_bar_bar1_reset(struct nvkm_device * device)40 nvkm_bar_bar1_reset(struct nvkm_device *device)
41 {
42 struct nvkm_bar *bar = device->bar;
43 if (bar) {
44 bar->func->bar1.init(bar);
45 bar->func->bar1.wait(bar);
46 }
47 }
48
49 struct nvkm_vmm *
nvkm_bar_bar2_vmm(struct nvkm_device * device)50 nvkm_bar_bar2_vmm(struct nvkm_device *device)
51 {
52 /* Denies access to BAR2 when it's not initialised, used by INSTMEM
53 * to know when object access needs to go through the BAR0 window.
54 */
55 struct nvkm_bar *bar = device->bar;
56 if (bar && bar->bar2)
57 return bar->func->bar2.vmm(bar);
58 return NULL;
59 }
60
61 void
nvkm_bar_bar2_reset(struct nvkm_device * device)62 nvkm_bar_bar2_reset(struct nvkm_device *device)
63 {
64 struct nvkm_bar *bar = device->bar;
65 if (bar && bar->bar2) {
66 bar->func->bar2.init(bar);
67 bar->func->bar2.wait(bar);
68 }
69 }
70
71 void
nvkm_bar_bar2_fini(struct nvkm_device * device)72 nvkm_bar_bar2_fini(struct nvkm_device *device)
73 {
74 struct nvkm_bar *bar = device->bar;
75 if (bar && bar->bar2) {
76 bar->func->bar2.fini(bar);
77 bar->bar2 = false;
78 }
79 }
80
81 void
nvkm_bar_bar2_init(struct nvkm_device * device)82 nvkm_bar_bar2_init(struct nvkm_device *device)
83 {
84 struct nvkm_bar *bar = device->bar;
85 if (bar && bar->subdev.oneinit && !bar->bar2 && bar->func->bar2.init) {
86 bar->func->bar2.init(bar);
87 bar->func->bar2.wait(bar);
88 bar->bar2 = true;
89 }
90 }
91
92 static int
nvkm_bar_fini(struct nvkm_subdev * subdev,bool suspend)93 nvkm_bar_fini(struct nvkm_subdev *subdev, bool suspend)
94 {
95 struct nvkm_bar *bar = nvkm_bar(subdev);
96
97 if (!subdev->use.enabled)
98 return 0;
99
100 if (bar->func->bar1.fini)
101 bar->func->bar1.fini(bar);
102
103 if (!suspend) /* Handled by instmem. */
104 nvkm_bar_bar2_fini(subdev->device);
105
106 return 0;
107 }
108
109 static int
nvkm_bar_init(struct nvkm_subdev * subdev)110 nvkm_bar_init(struct nvkm_subdev *subdev)
111 {
112 struct nvkm_bar *bar = nvkm_bar(subdev);
113 bar->func->bar1.init(bar);
114 bar->func->bar1.wait(bar);
115 if (bar->func->init)
116 bar->func->init(bar);
117 return 0;
118 }
119
120 static int
nvkm_bar_oneinit(struct nvkm_subdev * subdev)121 nvkm_bar_oneinit(struct nvkm_subdev *subdev)
122 {
123 struct nvkm_bar *bar = nvkm_bar(subdev);
124 return bar->func->oneinit(bar);
125 }
126
127 static void *
nvkm_bar_dtor(struct nvkm_subdev * subdev)128 nvkm_bar_dtor(struct nvkm_subdev *subdev)
129 {
130 struct nvkm_bar *bar = nvkm_bar(subdev);
131
132 return bar->func->dtor(bar);
133 }
134
135 static const struct nvkm_subdev_func
136 nvkm_bar = {
137 .dtor = nvkm_bar_dtor,
138 .oneinit = nvkm_bar_oneinit,
139 .init = nvkm_bar_init,
140 .fini = nvkm_bar_fini,
141 };
142
143 void
nvkm_bar_ctor(const struct nvkm_bar_func * func,struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_bar * bar)144 nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device,
145 enum nvkm_subdev_type type, int inst, struct nvkm_bar *bar)
146 {
147 nvkm_subdev_ctor(&nvkm_bar, device, type, inst, &bar->subdev);
148 bar->func = func;
149 spin_lock_init(&bar->lock);
150 }
151