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
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_vm *
34 nvkm_bar_kmap(struct nvkm_bar *bar)
35 {
36 	/* disallow kmap() until after vm has been bootstrapped */
37 	if (bar && bar->func->kmap && bar->subdev.oneinit)
38 		return bar->func->kmap(bar);
39 	return NULL;
40 }
41 
42 int
43 nvkm_bar_umap(struct nvkm_bar *bar, u64 size, int type, struct nvkm_vma *vma)
44 {
45 	return bar->func->umap(bar, size, type, vma);
46 }
47 
48 static int
49 nvkm_bar_oneinit(struct nvkm_subdev *subdev)
50 {
51 	struct nvkm_bar *bar = nvkm_bar(subdev);
52 	return bar->func->oneinit(bar);
53 }
54 
55 static int
56 nvkm_bar_init(struct nvkm_subdev *subdev)
57 {
58 	struct nvkm_bar *bar = nvkm_bar(subdev);
59 	return bar->func->init(bar);
60 }
61 
62 static void *
63 nvkm_bar_dtor(struct nvkm_subdev *subdev)
64 {
65 	struct nvkm_bar *bar = nvkm_bar(subdev);
66 	return bar->func->dtor(bar);
67 }
68 
69 static const struct nvkm_subdev_func
70 nvkm_bar = {
71 	.dtor = nvkm_bar_dtor,
72 	.oneinit = nvkm_bar_oneinit,
73 	.init = nvkm_bar_init,
74 };
75 
76 void
77 nvkm_bar_ctor(const struct nvkm_bar_func *func, struct nvkm_device *device,
78 	      int index, struct nvkm_bar *bar)
79 {
80 	nvkm_subdev_ctor(&nvkm_bar, device, index, &bar->subdev);
81 	bar->func = func;
82 	spin_lock_init(&bar->lock);
83 }
84