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Update to mapped_ioctl and linux emulation


From: Brock Johnson <wildefire@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 24 Feb 2005 10:50:32 -0600

Hi all,

I've been working with Simon Schubert on updating mapped_ioctl to handle some special cases under the linux emulator (drm and oss sound emulation), the attached patch fixes/adds support for mapping entire ioctl ranges to other ranges. I've been running with this for a couple days now and it's been fine here but we'd like to get more testing in. Assuming no objections or bugs show up, Simon has said he'll commit this on Monday evening.


Thanks, Brock
Index: conf/options
===================================================================
RCS file: /home/dcvs/src/sys/conf/options,v
retrieving revision 1.30
diff -u -r1.30 options
--- conf/options	11 Feb 2005 22:25:56 -0000	1.30
+++ conf/options	24 Feb 2005 15:54:08 -0000
@@ -1,5 +1,5 @@
 # $FreeBSD: src/sys/conf/options,v 1.191.2.53 2003/06/04 17:56:58 sam Exp $
-# $DragonFly: src/sys/conf/options,v 1.30 2005/02/11 22:25:56 joerg Exp $
+# $DragonFly$
 #
 #        On the handling of kernel options
 #
@@ -354,6 +354,7 @@
 
 # DRM options
 DRM_DEBUG		opt_drm.h
+DRM_LINUX		opt_drm.h
 
 # ATM (HARP version)
 ATM_CORE		opt_atm.h
Index: dev/drm/drm_drv.h
===================================================================
RCS file: /home/dcvs/src/sys/dev/drm/drm_drv.h,v
retrieving revision 1.10
diff -u -r1.10 drm_drv.h
--- dev/drm/drm_drv.h	18 Sep 2004 16:25:54 -0000	1.10
+++ dev/drm/drm_drv.h	24 Feb 2005 15:53:12 -0000
@@ -29,7 +29,7 @@
  *    Gareth Hughes <gareth@xxxxxxxxxxx>
  *
  * $FreeBSD: src/sys/dev/drm/drm_drv.h,v 1.13.2.1 2003/04/26 07:05:28 anholt Exp $
- * $DragonFly: src/sys/dev/drm/drm_drv.h,v 1.10 2004/09/18 16:25:54 joerg Exp $
+ * $DragonFly$
  */
 
 /*
@@ -1144,10 +1144,9 @@
 #define LINUX_IOCTL_DRM_MIN		0x6400
 #define LINUX_IOCTL_DRM_MAX		0x64ff
 
-static ioctl_map_func DRM(ioctl_dirmap);
 static struct ioctl_map_range DRM(ioctl_cmds)[] = {
-	/* XXX: we should have a BSD #define for the range */
-	MAPPED_IOCTL_MAPRANGE(LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX, LINUX_IOCTL_DRM_MIN, DRM(ioctl_dirmap)),
+	MAPPED_IOCTL_MAPRANGE(LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX, LINUX_IOCTL_DRM_MIN,
+			      LINUX_IOCTL_DRM_MAX, NULL, linux_gen_dirmap),
 	MAPPED_IOCTL_MAPF(0, 0, NULL)
 };
 
@@ -1162,11 +1161,4 @@
 SYSUNINIT(DRM(unregister), SI_SUB_KLD, SI_ORDER_MIDDLE, 
     mapped_ioctl_unregister_handler, &DRM(ioctl_handler));
 
-static int
-DRM(ioctl_dirmap)(struct file *fp, u_long cmd, u_long ocmd, caddr_t data, struct thread *td)
-{
-	return(linux_ioctl_dirmap(fp, cmd + (ocmd - LINUX_IOCTL_DRM_MIN),
-				  ocmd, data, td));
-}
-
 #endif /* DRM_LINUX */
Index: emulation/linux/linux_ioctl.c
===================================================================
RCS file: /home/dcvs/src/sys/emulation/linux/linux_ioctl.c,v
retrieving revision 1.16
diff -u -r1.16 linux_ioctl.c
--- emulation/linux/linux_ioctl.c	17 Feb 2005 13:59:36 -0000	1.16
+++ emulation/linux/linux_ioctl.c	24 Feb 2005 15:53:36 -0000
@@ -27,7 +27,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * $FreeBSD: src/sys/compat/linux/linux_ioctl.c,v 1.55.2.11 2003/05/01 20:16:09 anholt Exp $
- * $DragonFly: src/sys/emulation/linux/linux_ioctl.c,v 1.16 2005/02/17 13:59:36 joerg Exp $
+ * $DragonFly$
  */
 
 #include <sys/param.h>
@@ -1190,12 +1190,12 @@
 /*
  * generic linux -> BSD syscall direction mapper
  */
-int
-linux_ioctl_dirmap(struct file *fp, u_long cmd, u_long ocmd, caddr_t data, struct thread *td)
+u_long
+linux_gen_dirmap(u_long lstart, u_long lend, u_long bstart, u_long bend, u_long cmd, u_long ocmd)
 {
 	static u_int32_t dirbits[4] = { IOC_VOID, IOC_IN, IOC_OUT, IOC_INOUT };
 
-	return (fo_ioctl(fp, (cmd & ~IOC_DIRMASK) | dirbits[ocmd >> 30], data, td));
+	return (((cmd & ~IOC_DIRMASK) | dirbits[ocmd >> 30]));
 }
 
 
@@ -1247,60 +1247,15 @@
 	MAPPED_IOCTL_IOWR(LINUX_CDROMSUBCHNL, linux_ioctl_CDROMSUBCHNL, struct linux_cdrom_subchnl),
 	MAPPED_IOCTL_MAP(LINUX_CDROMRESET, CDIOCRESET),
 	/* sound ioctl */
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_VOLUME, SOUND_MIXER_WRITE_VOLUME, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_BASS, SOUND_MIXER_WRITE_BASS, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_TREBLE, SOUND_MIXER_WRITE_TREBLE, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_SYNTH, SOUND_MIXER_WRITE_SYNTH, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_PCM, SOUND_MIXER_WRITE_PCM, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_SPEAKER, SOUND_MIXER_WRITE_SPEAKER, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_LINE, SOUND_MIXER_WRITE_LINE, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_MIC, SOUND_MIXER_WRITE_MIC, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_CD, SOUND_MIXER_WRITE_CD, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_IMIX, SOUND_MIXER_WRITE_IMIX, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_ALTPCM, SOUND_MIXER_WRITE_ALTPCM, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_RECLEV, SOUND_MIXER_WRITE_RECLEV, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_IGAIN, SOUND_MIXER_WRITE_IGAIN, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_OGAIN, SOUND_MIXER_WRITE_OGAIN, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_LINE1, SOUND_MIXER_WRITE_LINE1, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_LINE2, SOUND_MIXER_WRITE_LINE2, linux_ioctl_dirmap),
-	MAPPED_IOCTL_MAPF(LINUX_SOUND_MIXER_WRITE_LINE3, SOUND_MIXER_WRITE_LINE3, linux_ioctl_dirmap),
+	MAPPED_IOCTL_MAPRANGE(LINUX_SOUND_MIXER_WRITE_MIN, LINUX_SOUND_MIXER_WRITE_MAX,
+			      LINUX_SOUND_MIXER_WRITE_MIN, LINUX_SOUND_MIXER_WRITE_MAX,
+			      NULL, linux_gen_dirmap),
 	MAPPED_IOCTL_IOR(LINUX_OSS_GETVERSION, linux_ioctl_OSS_GETVERSION, int),
 	MAPPED_IOCTL_MAP(LINUX_SOUND_MIXER_READ_DEVMASK, SOUND_MIXER_READ_DEVMASK),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_RESET, SNDCTL_DSP_RESET),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SYNC, SNDCTL_DSP_SYNC),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SPEED, SNDCTL_DSP_SPEED),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_STEREO, SNDCTL_DSP_STEREO),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETBLKSIZE, SNDCTL_DSP_GETBLKSIZE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SETFMT, SNDCTL_DSP_SETFMT),
-	MAPPED_IOCTL_MAP(LINUX_SOUND_PCM_WRITE_CHANNELS, SOUND_PCM_WRITE_CHANNELS),
-	MAPPED_IOCTL_MAP(LINUX_SOUND_PCM_WRITE_FILTER, SOUND_PCM_WRITE_FILTER),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_POST, SNDCTL_DSP_POST),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SUBDIVIDE, SNDCTL_DSP_SUBDIVIDE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SETFRAGMENT, SNDCTL_DSP_SETFRAGMENT),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETFMTS, SNDCTL_DSP_GETFMTS),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETOSPACE, SNDCTL_DSP_GETOSPACE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETISPACE, SNDCTL_DSP_GETISPACE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_NONBLOCK, SNDCTL_DSP_NONBLOCK),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETCAPS, SNDCTL_DSP_GETCAPS),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_SETTRIGGER, SNDCTL_DSP_SETTRIGGER),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETIPTR, SNDCTL_DSP_GETIPTR),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETOPTR, SNDCTL_DSP_GETOPTR),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_DSP_GETODELAY, SNDCTL_DSP_GETODELAY),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_RESET, SNDCTL_SEQ_RESET),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_SYNC, SNDCTL_SEQ_SYNC),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SYNTH_INFO, SNDCTL_SYNTH_INFO),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_CTRLRATE, SNDCTL_SEQ_CTRLRATE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_GETOUTCOUNT, SNDCTL_SEQ_GETOUTCOUNT),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_GETINCOUNT, SNDCTL_SEQ_GETINCOUNT),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_PERCMODE, SNDCTL_SEQ_PERCMODE),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_FM_LOAD_INSTR, SNDCTL_FM_LOAD_INSTR),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_TESTMIDI, SNDCTL_SEQ_TESTMIDI),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_RESETSAMPLES, SNDCTL_SEQ_RESETSAMPLES),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_NRSYNTHS, SNDCTL_SEQ_NRSYNTHS),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_NRMIDIS, SNDCTL_SEQ_NRMIDIS),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_MIDI_INFO, SNDCTL_MIDI_INFO),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SEQ_TRESHOLD, SNDCTL_SEQ_TRESHOLD),
-	MAPPED_IOCTL_MAP(LINUX_SNDCTL_SYNTH_MEMAVL, SNDCTL_SYNTH_MEMAVL),
+	MAPPED_IOCTL_MAPRANGE(LINUX_SNDCTL_DSP_MIN, LINUX_SNDCTL_DSP_MAX, LINUX_SNDCTL_DSP_MIN,
+			      LINUX_SNDCTL_DSP_MAX, NULL, linux_gen_dirmap),
+	MAPPED_IOCTL_MAPRANGE(LINUX_SNDCTL_SEQ_MIN, LINUX_SNDCTL_SEQ_MAX, LINUX_SNDCTL_SEQ_MIN,
+			      LINUX_SNDCTL_SEQ_MAX, NULL, linux_gen_dirmap),
 	/* console ioctl */
 	MAPPED_IOCTL_MAP(LINUX_KIOCSOUND, KIOCSOUND),
 	MAPPED_IOCTL_MAP(LINUX_KDMKTONE, KDMKTONE),
Index: emulation/linux/linux_ioctl.h
===================================================================
RCS file: /home/dcvs/src/sys/emulation/linux/linux_ioctl.h,v
retrieving revision 1.4
diff -u -r1.4 linux_ioctl.h
--- emulation/linux/linux_ioctl.h	15 Aug 2004 14:15:00 -0000	1.4
+++ emulation/linux/linux_ioctl.h	24 Feb 2005 15:53:51 -0000
@@ -26,7 +26,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * $FreeBSD: src/sys/compat/linux/linux_ioctl.h,v 1.4.2.4 2003/05/01 20:16:09 anholt Exp $
- * $DragonFly: src/sys/emulation/linux/linux_ioctl.h,v 1.4 2004/08/15 14:15:00 joerg Exp $
+ * $DragonFly$
  */
 
 #ifndef _LINUX_IOCTL_H_
@@ -169,65 +169,17 @@
 /*
  * sound
  */
-#define	LINUX_SOUND_MIXER_WRITE_VOLUME	0x4d00
-#define	LINUX_SOUND_MIXER_WRITE_BASS	0x4d01
-#define	LINUX_SOUND_MIXER_WRITE_TREBLE	0x4d02
-#define	LINUX_SOUND_MIXER_WRITE_SYNTH	0x4d03
-#define	LINUX_SOUND_MIXER_WRITE_PCM	0x4d04
-#define	LINUX_SOUND_MIXER_WRITE_SPEAKER	0x4d05
-#define	LINUX_SOUND_MIXER_WRITE_LINE	0x4d06
-#define	LINUX_SOUND_MIXER_WRITE_MIC	0x4d07
-#define	LINUX_SOUND_MIXER_WRITE_CD	0x4d08
-#define	LINUX_SOUND_MIXER_WRITE_IMIX	0x4d09
-#define	LINUX_SOUND_MIXER_WRITE_ALTPCM	0x4d0A
-#define	LINUX_SOUND_MIXER_WRITE_RECLEV	0x4d0B
-#define	LINUX_SOUND_MIXER_WRITE_IGAIN	0x4d0C
-#define	LINUX_SOUND_MIXER_WRITE_OGAIN	0x4d0D
-#define	LINUX_SOUND_MIXER_WRITE_LINE1	0x4d0E
-#define	LINUX_SOUND_MIXER_WRITE_LINE2	0x4d0F
-#define	LINUX_SOUND_MIXER_WRITE_LINE3	0x4d10
+#define	LINUX_SOUND_MIXER_WRITE_MIN	0x4d00
+#define	LINUX_SOUND_MIXER_WRITE_MAX	0x4d18
 #define	LINUX_OSS_GETVERSION		0x4d76
 #define	LINUX_SOUND_MIXER_READ_DEVMASK	0x4dfe
-#define	LINUX_SNDCTL_DSP_RESET		0x5000
-#define	LINUX_SNDCTL_DSP_SYNC		0x5001
-#define	LINUX_SNDCTL_DSP_SPEED		0x5002
-#define	LINUX_SNDCTL_DSP_STEREO		0x5003
-#define	LINUX_SNDCTL_DSP_GETBLKSIZE	0x5004
-#define	LINUX_SNDCTL_DSP_SETBLKSIZE	LINUX_SNDCTL_DSP_GETBLKSIZE
-#define	LINUX_SNDCTL_DSP_SETFMT		0x5005
-#define	LINUX_SOUND_PCM_WRITE_CHANNELS	0x5006
-#define	LINUX_SOUND_PCM_WRITE_FILTER	0x5007
-#define	LINUX_SNDCTL_DSP_POST		0x5008
-#define	LINUX_SNDCTL_DSP_SUBDIVIDE	0x5009
-#define	LINUX_SNDCTL_DSP_SETFRAGMENT	0x500A
-#define	LINUX_SNDCTL_DSP_GETFMTS	0x500B
-#define	LINUX_SNDCTL_DSP_GETOSPACE	0x500C
-#define	LINUX_SNDCTL_DSP_GETISPACE	0x500D
-#define	LINUX_SNDCTL_DSP_NONBLOCK	0x500E
-#define	LINUX_SNDCTL_DSP_GETCAPS	0x500F
-#define	LINUX_SNDCTL_DSP_GETTRIGGER	0x5010
-#define	LINUX_SNDCTL_DSP_SETTRIGGER	LINUX_SNDCTL_DSP_GETTRIGGER
-#define	LINUX_SNDCTL_DSP_GETIPTR	0x5011
-#define	LINUX_SNDCTL_DSP_GETOPTR	0x5012
-#define	LINUX_SNDCTL_DSP_GETODELAY	0x5017
-#define	LINUX_SNDCTL_SEQ_RESET		0x5100
-#define	LINUX_SNDCTL_SEQ_SYNC		0x5101
-#define	LINUX_SNDCTL_SYNTH_INFO		0x5102
-#define	LINUX_SNDCTL_SEQ_CTRLRATE	0x5103
-#define	LINUX_SNDCTL_SEQ_GETOUTCOUNT	0x5104
-#define	LINUX_SNDCTL_SEQ_GETINCOUNT	0x5105
-#define	LINUX_SNDCTL_SEQ_PERCMODE	0x5106
-#define	LINUX_SNDCTL_FM_LOAD_INSTR	0x5107
-#define	LINUX_SNDCTL_SEQ_TESTMIDI	0x5108
-#define	LINUX_SNDCTL_SEQ_RESETSAMPLES	0x5109
-#define	LINUX_SNDCTL_SEQ_NRSYNTHS	0x510A
-#define	LINUX_SNDCTL_SEQ_NRMIDIS	0x510B
-#define	LINUX_SNDCTL_MIDI_INFO		0x510C
-#define	LINUX_SNDCTL_SEQ_TRESHOLD	0x510D
-#define	LINUX_SNDCTL_SYNTH_MEMAVL	0x510E
+#define	LINUX_SNDCTL_DSP_MIN		0x5000
+#define	LINUX_SNDCTL_DSP_MAX		0x5017
+#define	LINUX_SNDCTL_SEQ_MIN		0x5100
+#define	LINUX_SNDCTL_SEQ_MAX		0x5116
 
-#define	LINUX_IOCTL_SOUND_MIN	LINUX_SOUND_MIXER_WRITE_VOLUME
-#define	LINUX_IOCTL_SOUND_MAX	LINUX_SNDCTL_SYNTH_MEMAVL
+#define	LINUX_IOCTL_SOUND_MIN	LINUX_SOUND_MIXER_WRITE_MIN
+#define	LINUX_IOCTL_SOUND_MAX	LINUX_SNDCTL_SEQ_MAX
 
 /*
  * termio
@@ -634,15 +586,12 @@
 #define	LINUX_ASYNC_CALLOUT_NOHUP	0x0400
 #define	LINUX_ASYNC_FLAGS		0x0FFF
 
-#define	LINUX_IOCTL_DRM_MIN	0x6400
-#define	LINUX_IOCTL_DRM_MAX	0x64ff
-
 /*
  * This doesn't really belong here, but I can't think of a better
  * place to put it.
  */
 struct ifnet;
 int		 linux_ifname(struct ifnet *, char *, size_t);
-int		 linux_ioctl_dirmap(struct file *, u_long, u_long, caddr_t, struct thread *);
+u_long		 linux_gen_dirmap(u_long, u_long, u_long, u_long, u_long, u_long);
 
 #endif /* !_LINUX_IOCTL_H_ */
Index: kern/sys_generic.c
===================================================================
RCS file: /home/dcvs/src/sys/kern/sys_generic.c,v
retrieving revision 1.18
diff -u -r1.18 sys_generic.c
--- kern/sys_generic.c	13 Sep 2004 23:41:18 -0000	1.18
+++ kern/sys_generic.c	24 Feb 2005 16:26:25 -0000
@@ -37,7 +37,7 @@
  *
  *	@(#)sys_generic.c	8.5 (Berkeley) 1/21/94
  * $FreeBSD: src/sys/kern/sys_generic.c,v 1.55.2.10 2001/03/17 10:39:32 peter Exp $
- * $DragonFly: src/sys/kern/sys_generic.c,v 1.18 2004/09/13 23:41:18 drhodus Exp $
+ * $DragonFly$
  */
 
 #include "opt_ktrace.h"
@@ -434,7 +434,8 @@
 
 		LIST_FOREACH(e, &map->mapping, entries) {
 			for (iomc = e->cmd_ranges; iomc->start != 0 ||
-			     iomc->maptocmd != 0 || iomc->func != NULL;
+			     iomc->maptocmd != 0 || iomc->wrapfunc != NULL ||
+			     iomc->mapfunc != NULL;
 			     iomc++) {
 				if (maskcmd >= iomc->start &&
 				    maskcmd <= iomc->end)
@@ -443,13 +444,13 @@
 
 			/* Did we find a match? */
 			if (iomc->start != 0 || iomc->maptocmd != 0 ||
-			    iomc->func != NULL)
+			    iomc->wrapfunc != NULL || iomc->mapfunc != NULL)
 				break;
 		}
 
 		if (iomc == NULL ||
 		    (iomc->start == 0 && iomc->maptocmd == 0
-		     && iomc->func == NULL)) {
+		     && iomc->wrapfunc == NULL && iomc->mapfunc == NULL)) {
 			printf("%s: 'ioctl' fd=%d, cmd=0x%lx ('%c',%d) not implemented\n",
 			       map->sys, fd, maskcmd,
 			       (int)((maskcmd >> 8) & 0xff),
@@ -457,7 +458,37 @@
 			return(EINVAL);
 		}
 
-		com = iomc->maptocmd;
+		/*
+		 * If it's a non-range one to one mapping, maptocmd should be
+		 * correct. If it's a ranged one to one mapping, we pass the
+		 * original value of com, and for a range mapped to a different
+		 * range, we need a mapping function to translate the ioctl
+		 * to our native ioctl. Ex. 6500-65ff <-> 9500-95ff
+		 */
+		if (iomc->start == iomc->end && iomc->maptocmd == iomc->maptoend) {
+			com = iomc->maptocmd;
+		} else if (iomc->start == iomc->maptocmd && iomc->end == iomc->maptoend) {
+			if (iomc->mapfunc != NULL) {
+				com = ocom;
+				com = iomc->mapfunc(iomc->start, iomc->end,
+						    iomc->maptocmd, iomc->maptoend,
+						    com, ocom);
+			} else {
+				com = ocom;
+			}
+		} else {
+			if (iomc->mapfunc != NULL) {
+				com = iomc->mapfunc(iomc->start, iomc->end,
+						    iomc->maptocmd, iomc->maptoend,
+						    com, ocom);
+			} else {
+				printf("%s: Invalid mapping for fd=%d, cmd=%#lx ('%c',%d)\n",
+				       map->sys, fd, maskcmd,
+				       (int)((maskcmd >> 8) & 0xff),
+				       (int)(maskcmd & 0xff));
+				return(EINVAL);
+			}
+		}
 	}
 
 	switch (com) {
@@ -531,8 +562,8 @@
 		 *  If there is a override function,
 		 *  call it instead of directly routing the call
 		 */
-		if (map != NULL && iomc->func != NULL)
-			error = iomc->func(fp, com, ocom, data, td);
+		if (map != NULL && iomc->wrapfunc != NULL)
+			error = iomc->wrapfunc(fp, com, ocom, data, td);
 		else
 			error = fo_ioctl(fp, com, data, td);
 		/*
Index: sys/mapped_ioctl.h
===================================================================
RCS file: /home/dcvs/src/sys/sys/mapped_ioctl.h,v
retrieving revision 1.1
diff -u -r1.1 mapped_ioctl.h
--- sys/mapped_ioctl.h	13 Aug 2004 11:59:00 -0000	1.1
+++ sys/mapped_ioctl.h	24 Feb 2005 15:52:50 -0000
@@ -31,7 +31,7 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  * 
- * $DragonFly: src/sys/sys/mapped_ioctl.h,v 1.1 2004/08/13 11:59:00 joerg Exp $
+ * $DragonFly$
  */
 #ifndef _SYS_MAPPED_IOCTL_H_
 #define _SYS_MAPPED_IOCTL_H_
@@ -42,23 +42,26 @@
 struct thread;
 struct ioctl_map_entry;
 
-typedef int	(ioctl_map_func)(struct file *, u_long, u_long, caddr_t,
+typedef int	(ioctl_wrap_func)(struct file *, u_long, u_long, caddr_t,
 				 struct thread *);
+typedef u_long	(ioctl_map_func)(u_long, u_long, u_long, u_long, u_long, u_long);
 
 struct ioctl_map_range {
 	u_long		start;
 	u_long		end;
 	u_long		maptocmd;
-	ioctl_map_func *func;
+	u_long		maptoend;
+	ioctl_wrap_func *wrapfunc;
+	ioctl_map_func  *mapfunc;
 };
 
-#define MAPPED_IOCTL_MAPRANGE(c,e,t,f)	{ (c), (e), (t), (f) }
-#define MAPPED_IOCTL_MAPF(c,t,f)    MAPPED_IOCTL_MAPRANGE((c), (c), (t), (f))
-#define MAPPED_IOCTL_MAP(c,t)	    MAPPED_IOCTL_MAPF((c), (t), NULL)
-#define MAPPED_IOCTL_IO(c,f)	    MAPPED_IOCTL_MAPF((c), _IO(0, 0), (f))
-#define MAPPED_IOCTL_IOR(c,f,t)	    MAPPED_IOCTL_MAPF((c), _IOR(0, 0, t), (f))
-#define MAPPED_IOCTL_IOW(c,f,t)	    MAPPED_IOCTL_MAPF((c), _IOW(0, 0, t), (f))
-#define MAPPED_IOCTL_IOWR(c,f,t)    MAPPED_IOCTL_MAPF((c), _IOWR(0, 0, t), (f))
+#define MAPPED_IOCTL_MAPRANGE(c,e,t,r,f,m)	{ (c), (e), (t), (r), (f), (m) }
+#define MAPPED_IOCTL_MAPF(c,t,f)		MAPPED_IOCTL_MAPRANGE((c), (c), (t), (t), (f), NULL)
+#define MAPPED_IOCTL_MAP(c,t)			MAPPED_IOCTL_MAPF((c), (t), NULL)
+#define MAPPED_IOCTL_IO(c,f)			MAPPED_IOCTL_MAPF((c), _IO(0, 0), (f))
+#define MAPPED_IOCTL_IOR(c,f,t) 		MAPPED_IOCTL_MAPF((c), _IOR(0, 0, t), (f))
+#define MAPPED_IOCTL_IOW(c,f,t) 		MAPPED_IOCTL_MAPF((c), _IOW(0, 0, t), (f))
+#define MAPPED_IOCTL_IOWR(c,f,t)		MAPPED_IOCTL_MAPF((c), _IOWR(0, 0, t), (f))
 
 struct ioctl_map {
 	u_long mask;


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