1 | /* $NetBSD: drm_pci_module.c,v 1.4 2015/03/06 01:24:24 riastradh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Taylor R. Campbell. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: drm_pci_module.c,v 1.4 2015/03/06 01:24:24 riastradh Exp $" ); |
34 | |
35 | #include <sys/module.h> |
36 | #include <sys/once.h> |
37 | |
38 | #include <drm/drmP.h> |
39 | |
40 | MODULE(MODULE_CLASS_MISC, drmkms_pci, "drmkms,pci" ); |
41 | |
42 | const struct drm_agp_hooks drmkms_pci_agp_hooks = { |
43 | .agph_acquire_ioctl = &drm_agp_acquire_ioctl, |
44 | .agph_release_ioctl = &drm_agp_release_ioctl, |
45 | .agph_enable_ioctl = &drm_agp_enable_ioctl, |
46 | .agph_info_ioctl = &drm_agp_info_ioctl, |
47 | .agph_alloc_ioctl = &drm_agp_alloc_ioctl, |
48 | .agph_free_ioctl = &drm_agp_free_ioctl, |
49 | .agph_bind_ioctl = &drm_agp_bind_ioctl, |
50 | .agph_unbind_ioctl = &drm_agp_unbind_ioctl, |
51 | .agph_release = &drm_agp_release, |
52 | .agph_clear = &drm_agp_clear, |
53 | }; |
54 | |
55 | static int |
56 | drmkms_pci_agp_init(void) |
57 | { |
58 | int error; |
59 | |
60 | error = drm_agp_register(&drmkms_pci_agp_hooks); |
61 | if (error) |
62 | return error; |
63 | |
64 | return 0; |
65 | } |
66 | |
67 | int |
68 | drmkms_pci_agp_guarantee_initialized(void) |
69 | { |
70 | #ifdef _MODULE |
71 | return 0; |
72 | #else |
73 | static ONCE_DECL(drmkms_pci_agp_init_once); |
74 | |
75 | return RUN_ONCE(&drmkms_pci_agp_init_once, &drmkms_pci_agp_init); |
76 | #endif |
77 | } |
78 | |
79 | static void |
80 | drmkms_pci_agp_fini(void) |
81 | { |
82 | |
83 | drm_agp_deregister(&drmkms_pci_agp_hooks); |
84 | } |
85 | |
86 | static int |
87 | drmkms_pci_modcmd(modcmd_t cmd, void *arg __unused) |
88 | { |
89 | int error; |
90 | |
91 | switch (cmd) { |
92 | case MODULE_CMD_INIT: |
93 | #ifdef _MODULE |
94 | error = drmkms_pci_agp_init(); |
95 | #else |
96 | error = drmkms_pci_agp_guarantee_initialized(); |
97 | #endif |
98 | if (error) |
99 | return error; |
100 | return 0; |
101 | |
102 | case MODULE_CMD_FINI: |
103 | drmkms_pci_agp_fini(); |
104 | return 0; |
105 | |
106 | default: |
107 | return ENOTTY; |
108 | } |
109 | } |
110 | |