1 | /* $NetBSD: drm_module.c,v 1.11 2015/04/13 22:24:34 pgoyette 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_module.c,v 1.11 2015/04/13 22:24:34 pgoyette Exp $" ); |
34 | |
35 | #include <sys/types.h> |
36 | #include <sys/conf.h> |
37 | #include <sys/device.h> |
38 | #include <sys/module.h> |
39 | #ifndef _MODULE |
40 | #include <sys/once.h> |
41 | #endif |
42 | #include <sys/reboot.h> |
43 | #include <sys/systm.h> |
44 | |
45 | #include <linux/mutex.h> |
46 | |
47 | #include <drm/drmP.h> |
48 | #include <drm/drm_encoder_slave.h> |
49 | #include <drm/drm_sysctl.h> |
50 | |
51 | /* |
52 | * XXX I2C stuff should be moved to a separate drmkms_i2c module. |
53 | */ |
54 | MODULE(MODULE_CLASS_DRIVER, drmkms, "drmkms_linux" ); |
55 | |
56 | struct mutex drm_global_mutex; |
57 | |
58 | struct drm_sysctl_def drm_def = DRM_SYSCTL_INIT(); |
59 | |
60 | static int |
61 | drm_init(void) |
62 | { |
63 | extern int linux_guarantee_initialized(void); |
64 | int error; |
65 | |
66 | error = linux_guarantee_initialized(); |
67 | if (error) |
68 | return error; |
69 | |
70 | if (ISSET(boothowto, AB_DEBUG)) |
71 | drm_debug = ~(unsigned int)0; |
72 | |
73 | spin_lock_init(&drm_minor_lock); |
74 | idr_init(&drm_minors_idr); |
75 | linux_mutex_init(&drm_global_mutex); |
76 | drm_connector_ida_init(); |
77 | drm_global_init(); |
78 | drm_sysctl_init(&drm_def); |
79 | drm_i2c_encoders_init(); |
80 | |
81 | return 0; |
82 | } |
83 | |
84 | int drm_guarantee_initialized(void); /* XXX */ |
85 | int |
86 | drm_guarantee_initialized(void) |
87 | { |
88 | #ifdef _MODULE |
89 | return 0; |
90 | #else |
91 | static ONCE_DECL(drm_init_once); |
92 | |
93 | return RUN_ONCE(&drm_init_once, &drm_init); |
94 | #endif |
95 | } |
96 | |
97 | static void |
98 | drm_fini(void) |
99 | { |
100 | |
101 | drm_i2c_encoders_fini(); |
102 | drm_sysctl_fini(&drm_def); |
103 | drm_global_release(); |
104 | drm_connector_ida_destroy(); |
105 | linux_mutex_destroy(&drm_global_mutex); |
106 | idr_destroy(&drm_minors_idr); |
107 | spin_lock_destroy(&drm_minor_lock); |
108 | } |
109 | |
110 | static int |
111 | drmkms_modcmd(modcmd_t cmd, void *arg __unused) |
112 | { |
113 | #ifdef _MODULE |
114 | devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR; |
115 | #endif |
116 | int error; |
117 | |
118 | switch (cmd) { |
119 | case MODULE_CMD_INIT: |
120 | #ifdef _MODULE |
121 | error = drm_init(); |
122 | #else |
123 | error = drm_guarantee_initialized(); |
124 | #endif |
125 | if (error) |
126 | return error; |
127 | #ifdef _MODULE |
128 | error = devsw_attach("drm" , NULL, &bmajor, |
129 | &drm_cdevsw, &cmajor); |
130 | if (error) { |
131 | aprint_error("drmkms: unable to attach devsw: %d\n" , |
132 | error); |
133 | return error; |
134 | } |
135 | #endif |
136 | return 0; |
137 | |
138 | case MODULE_CMD_FINI: |
139 | #ifdef _MODULE |
140 | error = devsw_detach(NULL, &drm_cdevsw); |
141 | if (error) |
142 | return error; |
143 | #endif |
144 | drm_fini(); |
145 | return 0; |
146 | |
147 | default: |
148 | return ENOTTY; |
149 | } |
150 | } |
151 | |