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
40MODULE(MODULE_CLASS_MISC, drmkms_pci, "drmkms,pci");
41
42const 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
55static int
56drmkms_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
67int
68drmkms_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
79static void
80drmkms_pci_agp_fini(void)
81{
82
83 drm_agp_deregister(&drmkms_pci_agp_hooks);
84}
85
86static int
87drmkms_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