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[FreeBSD/releng/9.2.git] / sys / cam / cam_compat.c
1 /*-
2  * CAM ioctl compatibility shims
3  *
4  * Copyright (c) 2013 Scott Long
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions, and the following disclaimer,
12  *    without modification, immediately at the beginning of the file.
13  * 2. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/types.h>
36 #include <sys/kernel.h>
37 #include <sys/conf.h>
38 #include <sys/fcntl.h>
39
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/sysctl.h>
43 #include <sys/kthread.h>
44
45 #include <cam/cam.h>
46 #include <cam/cam_ccb.h>
47 #include <cam/cam_compat.h>
48
49 #include <cam/scsi/scsi_pass.h>
50
51 #include "opt_cam.h"
52
53 int
54 cam_compat_ioctl(struct cdev *dev, u_long *cmd, caddr_t *addr, int *flag, struct thread *td)
55 {
56         int error;
57
58         switch (*cmd) {
59         case CAMIOCOMMAND_0x16:
60         {
61                 union ccb *ccb;
62
63                 ccb = (union ccb *)*addr;
64                 if (ccb->ccb_h.flags & CAM_SG_LIST_PHYS_0x16) {
65                         ccb->ccb_h.flags &= ~CAM_SG_LIST_PHYS_0x16;
66                         ccb->ccb_h.flags |= CAM_DATA_SG_PADDR;
67                 }
68                 if (ccb->ccb_h.flags & CAM_DATA_PHYS_0x16) {
69                         ccb->ccb_h.flags &= ~CAM_DATA_PHYS_0x16;
70                         ccb->ccb_h.flags |= CAM_DATA_PADDR;
71                 }
72                 if (ccb->ccb_h.flags & CAM_SCATTER_VALID_0x16) {
73                         ccb->ccb_h.flags &= CAM_SCATTER_VALID_0x16;
74                         ccb->ccb_h.flags |= CAM_DATA_SG;
75                 }
76                 *cmd = CAMIOCOMMAND;
77                 error = EAGAIN;
78                 break;
79         }
80         case CAMGETPASSTHRU_0x16:
81                 *cmd = CAMGETPASSTHRU;
82                 error = EAGAIN;
83                 break;
84         default:
85                 error = ENOTTY;
86         }
87
88         return (error);
89 }