xref: /linux/drivers/gpu/drm/nouveau/nvkm/subdev/bar/base.c (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
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