xref: /freebsd/sys/cam/cam_compat.c (revision a98ff317388a00b992f1bf8404dee596f9383f5e)
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 }
90