xref: /freebsd/sys/dev/mrsas/mrsas_linux.c (revision a7623790fb345e6dc986dfd31df0ace115e6f2e4)
1 /*
2  * Copyright (c) 2015, AVAGO Tech. All rights reserved. Author: Kashyap Desai,
3  * Copyright (c) 2014, LSI Corp. All rights reserved. Author: Kashyap Desai,
4  * Sibananda Sahu Support: freebsdraid@avagotech.com
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  * 1. Redistributions of source code must retain the above copyright notice,
11  * this list of conditions and the following disclaimer. 2. Redistributions
12  * in binary form must reproduce the above copyright notice, this list of
13  * conditions and the following disclaimer in the documentation and/or other
14  * materials provided with the distribution. 3. Neither the name of the
15  * <ORGANIZATION> nor the names of its contributors may be used to endorse or
16  * promote products derived from this software without specific prior written
17  * permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23  * 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  * The views and conclusions contained in the software and documentation are
32  * those of the authors and should not be interpreted as representing
33  * official policies,either expressed or implied, of the FreeBSD Project.
34  *
35  * Send feedback to: <megaraidfbsd@avagotech.com> Mail to: AVAGO TECHNOLOGIES, 1621
36  * Barber Lane, Milpitas, CA 95035 ATTN: MegaRaid FreeBSD
37  *
38  */
39 
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42 
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 
46 #if (__FreeBSD_version >= 1001511)
47 #include <sys/capsicum.h>
48 #elif (__FreeBSD_version > 900000)
49 #include <sys/capability.h>
50 #endif
51 
52 #include <sys/conf.h>
53 #include <sys/kernel.h>
54 #include <sys/module.h>
55 #include <sys/file.h>
56 #include <sys/proc.h>
57 #include <machine/bus.h>
58 
59 #if defined(__amd64__)			/* Assume amd64 wants 32 bit Linux */
60 #include <machine/../linux32/linux.h>
61 #include <machine/../linux32/linux32_proto.h>
62 #else
63 #include <machine/../linux/linux.h>
64 #include <machine/../linux/linux_proto.h>
65 #endif
66 #include <compat/linux/linux_ioctl.h>
67 #include <compat/linux/linux_util.h>
68 
69 #include <dev/mrsas/mrsas.h>
70 #undef COMPAT_FREEBSD32
71 #include <dev/mrsas/mrsas_ioctl.h>
72 
73 /* There are multiple ioctl number ranges that need to be handled */
74 #define	MRSAS_LINUX_IOCTL_MIN  0x4d00
75 #define	MRSAS_LINUX_IOCTL_MAX  0x4d01
76 
77 static linux_ioctl_function_t mrsas_linux_ioctl;
78 static struct linux_ioctl_handler mrsas_linux_handler = {mrsas_linux_ioctl,
79 	MRSAS_LINUX_IOCTL_MIN,
80 MRSAS_LINUX_IOCTL_MAX};
81 
82 SYSINIT(mrsas_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
83     linux_ioctl_register_handler, &mrsas_linux_handler);
84 SYSUNINIT(mrsas_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
85     linux_ioctl_unregister_handler, &mrsas_linux_handler);
86 
87 static struct linux_device_handler mrsas_device_handler =
88 {"mrsas", "megaraid_sas", "mrsas0", "megaraid_sas_ioctl_node", -1, 0, 1};
89 
90 SYSINIT(mrsas_register2, SI_SUB_KLD, SI_ORDER_MIDDLE,
91     linux_device_register_handler, &mrsas_device_handler);
92 SYSUNINIT(mrsas_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
93     linux_device_unregister_handler, &mrsas_device_handler);
94 
95 static int
96 mrsas_linux_modevent(module_t mod __unused, int cmd __unused, void *data __unused)
97 {
98 	return (0);
99 }
100 
101 /*
102  * mrsas_linux_ioctl:	linux emulator IOCtl commands entry point.
103  *
104  * This function is the entry point for IOCtls from linux binaries.
105  * It calls the mrsas_ioctl function for processing
106  * depending on the IOCTL command received.
107  */
108 static int
109 mrsas_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
110 {
111 #if (__FreeBSD_version >= 1000000)
112 	cap_rights_t rights;
113 
114 #endif
115 	struct file *fp;
116 	int error;
117 	u_long cmd = args->cmd;
118 
119 	if (cmd != MRSAS_LINUX_CMD32) {
120 		error = ENOTSUP;
121 		goto END;
122 	}
123 #if (__FreeBSD_version >= 1000000)
124 	error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
125 #elif (__FreeBSD_version <= 900000)
126 	error = fget(p, args->fd, &fp);
127 #else					/* For FreeBSD version greater than
128 					 * 9.0.0 but less than 10.0.0 */
129 	error = fget(p, args->fd, CAP_IOCTL, &fp);
130 #endif
131 	if (error != 0)
132 		goto END;
133 
134 	error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
135 	fdrop(fp, p);
136 END:
137 	return (error);
138 }
139 
140 DEV_MODULE(mrsas_linux, mrsas_linux_modevent, NULL);
141 MODULE_DEPEND(mrsas, linux, 1, 1, 1);
142