mrsas_linux.c revision 275976 
1/*
2 * Copyright (c) 2014, LSI Corp. All rights reserved. Author: Kashyap Desai,
3 * Sibananda Sahu Support: freebsdraid@lsi.com
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer. 2. Redistributions
11 * in binary form must reproduce the above copyright notice, this list of
12 * conditions and the following disclaimer in the documentation and/or other
13 * materials provided with the distribution. 3. Neither the name of the
14 * <ORGANIZATION> nor the names of its contributors may be used to endorse or
15 * promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 *
30 * The views and conclusions contained in the software and documentation are
31 * those of the authors and should not be interpreted as representing
32 * official policies,either expressed or implied, of the FreeBSD Project.
33 *
34 * Send feedback to: <megaraidfbsd@lsi.com> Mail to: LSI Corporation, 1621
35 * Barber Lane, Milpitas, CA 95035 ATTN: MegaRaid FreeBSD
36 *
37 */
38
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: stable/10/sys/dev/mrsas/mrsas_linux.c 275976 2014-12-21 02:35:22Z smh $");
41
42#include <sys/param.h>
43#include <sys/systm.h>
44
45#if (__FreeBSD_version > 900000)
46#include <sys/capability.h>
47#endif
48
49#include <sys/conf.h>
50#include <sys/kernel.h>
51#include <sys/module.h>
52#include <sys/file.h>
53#include <sys/proc.h>
54#include <machine/bus.h>
55
56#if defined(__amd64__)			/* Assume amd64 wants 32 bit Linux */
57#include <machine/../linux32/linux.h>
58#include <machine/../linux32/linux32_proto.h>
59#else
60#include <machine/../linux/linux.h>
61#include <machine/../linux/linux_proto.h>
62#endif
63#include <compat/linux/linux_ioctl.h>
64#include <compat/linux/linux_util.h>
65
66#include <dev/mrsas/mrsas.h>
67#include <dev/mrsas/mrsas_ioctl.h>
68
69/* There are multiple ioctl number ranges that need to be handled */
70#define	MRSAS_LINUX_IOCTL_MIN  0x4d00
71#define	MRSAS_LINUX_IOCTL_MAX  0x4d01
72
73static linux_ioctl_function_t mrsas_linux_ioctl;
74static struct linux_ioctl_handler mrsas_linux_handler = {mrsas_linux_ioctl,
75	MRSAS_LINUX_IOCTL_MIN,
76MRSAS_LINUX_IOCTL_MAX};
77
78SYSINIT(mrsas_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
79    linux_ioctl_register_handler, &mrsas_linux_handler);
80SYSUNINIT(mrsas_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
81    linux_ioctl_unregister_handler, &mrsas_linux_handler);
82
83static struct linux_device_handler mrsas_device_handler =
84{"mrsas", "megaraid_sas", "mrsas0", "megaraid_sas_ioctl_node", -1, 0, 1};
85
86SYSINIT(mrsas_register2, SI_SUB_KLD, SI_ORDER_MIDDLE,
87    linux_device_register_handler, &mrsas_device_handler);
88SYSUNINIT(mrsas_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
89    linux_device_unregister_handler, &mrsas_device_handler);
90
91static int
92mrsas_linux_modevent(module_t mod __unused, int cmd __unused, void *data __unused)
93{
94	return (0);
95}
96
97/*
98 * mrsas_linux_ioctl:	linux emulator IOCtl commands entry point.
99 *
100 * This function is the entry point for IOCtls from linux binaries.
101 * It calls the mrsas_ioctl function for processing
102 * depending on the IOCTL command received.
103 */
104static int
105mrsas_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
106{
107#if (__FreeBSD_version >= 1000000)
108	cap_rights_t rights;
109
110#endif
111	struct file *fp;
112	int error;
113	u_long cmd = args->cmd;
114
115	if (cmd != MRSAS_LINUX_CMD32) {
116		error = ENOTSUP;
117		goto END;
118	}
119#if (__FreeBSD_version >= 1000000)
120	error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
121#elif (__FreeBSD_version <= 900000)
122	error = fget(p, args->fd, &fp);
123#else					/* For FreeBSD version greater than
124					 * 9.0.0 but less than 10.0.0 */
125	error = fget(p, args->fd, CAP_IOCTL, &fp);
126#endif
127	if (error != 0)
128		goto END;
129
130	error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
131	fdrop(fp, p);
132END:
133	return (error);
134}
135
136DEV_MODULE(mrsas_linux, mrsas_linux_modevent, NULL);
137MODULE_DEPEND(mrsas, linux, 1, 1, 1);
138