1 | /* $NetBSD: linux_module.c,v 1.6 2015/04/13 22:24:34 pgoyette Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2014 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: linux_module.c,v 1.6 2015/04/13 22:24:34 pgoyette Exp $" ); |
34 | |
35 | #include <sys/module.h> |
36 | #ifndef _MODULE |
37 | #include <sys/once.h> |
38 | #endif |
39 | |
40 | #include <linux/highmem.h> |
41 | #include <linux/idr.h> |
42 | #include <linux/io.h> |
43 | #include <linux/mutex.h> |
44 | #include <linux/reservation.h> |
45 | #include <linux/workqueue.h> |
46 | |
47 | MODULE(MODULE_CLASS_MISC, drmkms_linux, "i2cexec" ); |
48 | |
49 | DEFINE_WW_CLASS(reservation_ww_class __cacheline_aligned); |
50 | |
51 | static int |
52 | linux_init(void) |
53 | { |
54 | int error; |
55 | |
56 | error = linux_idr_module_init(); |
57 | if (error) { |
58 | printf("linux: unable to initialize idr: %d\n" , error); |
59 | goto fail0; |
60 | } |
61 | |
62 | error = linux_kmap_init(); |
63 | if (error) { |
64 | printf("linux: unable to initialize kmap: %d\n" , error); |
65 | goto fail1; |
66 | } |
67 | |
68 | error = linux_workqueue_init(); |
69 | if (error) { |
70 | printf("linux: unable to initialize workqueues: %d\n" , error); |
71 | goto fail2; |
72 | } |
73 | |
74 | error = linux_writecomb_init(); |
75 | if (error) { |
76 | printf("linux: unable to initialize write-combining: %d\n" , |
77 | error); |
78 | goto fail3; |
79 | } |
80 | |
81 | return 0; |
82 | |
83 | fail4: __unused |
84 | linux_writecomb_fini(); |
85 | fail3: linux_workqueue_fini(); |
86 | fail2: linux_kmap_fini(); |
87 | fail1: linux_idr_module_fini(); |
88 | fail0: return error; |
89 | } |
90 | |
91 | int linux_guarantee_initialized(void); /* XXX */ |
92 | int |
93 | linux_guarantee_initialized(void) |
94 | { |
95 | #ifdef _MODULE |
96 | return 0; |
97 | #else |
98 | static ONCE_DECL(linux_init_once); |
99 | |
100 | return RUN_ONCE(&linux_init_once, &linux_init); |
101 | #endif |
102 | } |
103 | |
104 | static void |
105 | linux_fini(void) |
106 | { |
107 | |
108 | linux_writecomb_fini(); |
109 | linux_workqueue_fini(); |
110 | linux_kmap_fini(); |
111 | linux_idr_module_fini(); |
112 | } |
113 | |
114 | static int |
115 | drmkms_linux_modcmd(modcmd_t cmd, void *arg __unused) |
116 | { |
117 | |
118 | switch (cmd) { |
119 | case MODULE_CMD_INIT: |
120 | #ifdef _MODULE |
121 | return linux_init(); |
122 | #else |
123 | return linux_guarantee_initialized(); |
124 | #endif |
125 | case MODULE_CMD_FINI: |
126 | linux_fini(); |
127 | return 0; |
128 | default: |
129 | return ENOTTY; |
130 | } |
131 | } |
132 | |