Add in the Linux IOCTL shim and create the megadev0 device so

Linux LSI MegaRaid tools can run on FreeBSD until Linux emulation.

Add in the Linux IOCTL shim and create the megadev0 device so
Linux LSI MegaRaid tools can run on FreeBSD until Linux emulation.

Add glue to build the modules but don't tie it into the build
yet until I test it from the CVS repo. via the mirror on an
amd64 machine.

Tie this into the Linux32 emulation on amd64 so the tools can
run on amd64 kernel.

Cleaned up by:	ps (amr_linux.c)

4 files changed, 201 insertions, 0 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 6a7497c5c078..773b690c84d7 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -439,6 +439,7 @@ dev/amd/amd.c			optional amd
 dev/amr/amr.c			optional amr
 dev/amr/amr_cam.c		optional amr
 dev/amr/amr_disk.c		optional amr
+dev/amr/amr_linux.c		optional amr compat_linux
 dev/amr/amr_pci.c		optional amr pci
 dev/an/if_an.c			optional an
 dev/an/if_an_isa.c		optional an isa
diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
index a4fe56408b9a..c752545aa49f 100644
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -230,6 +230,7 @@ compat/linux/linux_stats.c	optional	compat_linux32
 compat/linux/linux_sysctl.c	optional	compat_linux32
 compat/linux/linux_uid16.c	optional	compat_linux32
 compat/linux/linux_util.c	optional	compat_linux32
+dev/amr/amr_linux.c		optional	compat_linux32 amr
 #
 # Windows NDIS driver support
 #
diff --git a/sys/dev/amr/amr_linux.c b/sys/dev/amr/amr_linux.c
new file mode 100644
index 000000000000..585e3e55e93a
--- /dev/null
+++ b/sys/dev/amr/amr_linux.c
@@ -0,0 +1,191 @@
+/*-
+ * Copyright (c) 2005 Paul Saab
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bio.h>
+
+#if defined(__amd64__) /* Assume amd64 wants 32 bit Linux */
+#include <machine/../linux32/linux.h>
+#include <machine/../linux32/linux32_proto.h>
+#else
+#include <machine/../linux/linux.h>
+#include <machine/../linux/linux_proto.h>
+#endif
+#include <compat/linux/linux_ioctl.h>
+
+#include <sys/bus.h>
+#include <sys/stat.h>
+
+#include <machine/bus.h>
+
+#include <dev/amr/amrreg.h>
+#include <dev/amr/amrvar.h>
+
+/* There are multiple ioctl number ranges that need to be handled */
+#define AMR_LINUX_IOCTL_MIN  0x00000
+#define AMR_LINUX_IOCTL_MAX  0x50000
+
+static linux_ioctl_function_t amr_linux_ioctl;
+static struct linux_ioctl_handler amr_linux_handler = {amr_linux_ioctl,
+						       AMR_LINUX_IOCTL_MIN,
+						       AMR_LINUX_IOCTL_MAX};
+
+SYSINIT  (amr_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
+	  linux_ioctl_register_handler, &amr_linux_handler);
+SYSUNINIT(amr_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
+	  linux_ioctl_unregister_handler, &amr_linux_handler);
+
+static d_open_t		amr_linux_open;
+static d_close_t	amr_linux_close;
+
+static int		amr_linux_isopen;
+static struct cdev *	amr_linux_dev_t;
+
+static struct cdevsw megadev_cdevsw = {
+        .d_version =    D_VERSION,
+        .d_flags =      D_NEEDGIANT,
+        .d_open =       amr_linux_open,
+        .d_close =      amr_linux_close,
+        .d_name =       "megadev",
+};
+
+
+static int
+amr_linux_open(struct cdev * dev, int flags, int fmt, d_thread_t *td)
+{
+
+	amr_linux_isopen++;
+	return (0);
+};
+
+static int
+amr_linux_close(struct cdev * dev, int flags, int fmt, d_thread_t *td)
+{
+
+	amr_linux_isopen--;
+	return (0);
+};
+
+static int
+amr_linux_init(void)
+{
+	devclass_t		devclass;
+	struct amr_softc	*sc;
+	int			i, linux_no_adapters, max_unit;
+
+	devclass = devclass_find("amr");
+	if (devclass == NULL)
+		return (0);
+
+	max_unit = devclass_get_maxunit(devclass);
+	if (max_unit == 0)
+		return (0);
+
+	for (i = 0; i < max_unit; i++) {
+		sc = devclass_get_softc(devclass, i);
+		if (sc == NULL)
+			break;
+	}
+
+	linux_no_adapters = i;
+	for (i = 0; i < linux_no_adapters; i++) {
+		sc = devclass_get_softc(devclass, i);
+		if (sc == NULL)
+			break;
+		sc->amr_linux_no_adapters = linux_no_adapters;
+	}
+
+	return (linux_no_adapters);
+}
+
+static int
+amr_linux_modevent(module_t mod, int cmd, void *data)
+{
+
+	switch (cmd) {
+	case MOD_LOAD:
+		if (amr_linux_init() == 0)
+			return (ENXIO);
+
+		if (amr_linux_dev_t)
+			return (EEXIST);
+		
+		amr_linux_dev_t = make_dev(&megadev_cdevsw, 0, UID_ROOT,
+		    GID_OPERATOR, S_IRUSR | S_IWUSR, "megadev%d", 0);
+		if (amr_linux_dev_t == NULL)
+			return (ENXIO);
+		break;
+
+	case MOD_UNLOAD:
+		if (amr_linux_isopen)
+			return (EBUSY);
+		if (amr_linux_dev_t)
+			destroy_dev(amr_linux_dev_t);
+		break;
+
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+static moduledata_t amr_linux_mod = {"amr_linux", amr_linux_modevent, NULL};
+DECLARE_MODULE(amr_linux, amr_linux_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);
+MODULE_DEPEND(amr, linux, 1, 1, 1);
+
+static int
+amr_linux_ioctl(d_thread_t *p, struct linux_ioctl_args *args)
+{
+	devclass_t		devclass;
+	struct amr_softc	*sc;
+	struct amr_linux_ioctl	ali;
+	int			adapter;
+
+	devclass = devclass_find("amr");
+	if (devclass == NULL)
+		return (ENOENT);
+
+	copyin((caddr_t)args->arg, &ali, sizeof(ali));
+	if (ali.ui.fcs.opcode == 0x82)
+		adapter = 0;
+	else
+		adapter	= (ali.ui.fcs.adapno) ^ 'm' << 8;
+
+	sc = devclass_get_softc(devclass, adapter);
+	if (sc == NULL)
+		return (ENOENT);
+
+	return (amr_linux_ioctl_int(sc->amr_dev_t, args->cmd,
+	    (caddr_t)args->arg, 0, p));
+}
diff --git a/sys/modules/amr/amr_linux/Makefile b/sys/modules/amr/amr_linux/Makefile
new file mode 100644
index 000000000000..3df7eed5e446
--- /dev/null
+++ b/sys/modules/amr/amr_linux/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/../../../dev/amr
+
+KMOD=	amr_linux
+SRCS=	amr_linux.c device_if.h bus_if.h
+
+.include <bsd.kmod.mk>