linux_module.c revision 1.2 
1/*	$NetBSD: linux_module.c,v 1.2 2014/03/18 18:20:43 riastradh 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 1.2 2014/03/18 18:20:43 riastradh Exp $");
34
35#include <sys/module.h>
36
37#include <linux/highmem.h>
38#include <linux/mutex.h>
39#include <linux/workqueue.h>
40
41MODULE(MODULE_CLASS_MISC, drmkms_linux, NULL);
42
43#ifndef _MODULE
44/*
45 * XXX Mega-kludge.  See drm_init in drm_drv.c for details.
46 */
47int linux_suppress_init = 0;
48#endif
49
50static int
51drmkms_linux_modcmd(modcmd_t cmd, void *arg __unused)
52{
53	int error;
54
55	switch (cmd) {
56	case MODULE_CMD_INIT:
57#ifndef _MODULE
58		if (linux_suppress_init)
59			return 0;
60#endif
61		error = linux_kmap_init();
62		if (error) {
63			aprint_error("drmkms_linux:"
64			    " unable to initialize linux kmap: %d",
65			    error);
66			goto init_fail0;
67		}
68		error = linux_workqueue_init();
69		if (error) {
70			aprint_error("drmkms_linux:"
71			    " unable to initialize workqueues: %d",
72			    error);
73			goto init_fail1;
74		}
75		return 0;
76
77init_fail1:	linux_kmap_fini();
78init_fail0:	return error;
79
80	case MODULE_CMD_FINI:
81		linux_workqueue_fini();
82		linux_kmap_fini();
83		return 0;
84
85	default:
86		return ENOTTY;
87	}
88}
89