From 94ab96c4d8203c236c6a5a8d8a6a761ccf808662 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@ppcg5.localdomain>
Date: Sun, 5 Nov 2006 20:38:44 +1100
Subject: nouveau: add compat ioc32 support

---
 linux-core/Makefile.kernel |  1 +
 linux-core/nouveau_drv.c   |  3 ++
 linux-core/nouveau_ioc32.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++
 shared-core/nouveau_drv.h  |  3 ++
 4 files changed, 80 insertions(+)
 create mode 100644 linux-core/nouveau_ioc32.c

diff --git a/linux-core/Makefile.kernel b/linux-core/Makefile.kernel
index 950259bd..71605de6 100644
--- a/linux-core/Makefile.kernel
+++ b/linux-core/Makefile.kernel
@@ -35,6 +35,7 @@ radeon-objs += radeon_ioc32.o
 mga-objs    += mga_ioc32.o
 r128-objs   += r128_ioc32.o
 i915-objs   += i915_ioc32.o
+nouveau-objs += nouveau_ioc32.o
 endif
 
 obj-m			+= drm.o
diff --git a/linux-core/nouveau_drv.c b/linux-core/nouveau_drv.c
index 8ad1d849..57b55ce1 100644
--- a/linux-core/nouveau_drv.c
+++ b/linux-core/nouveau_drv.c
@@ -60,6 +60,9 @@ static struct drm_driver driver = {
 		.mmap = drm_mmap,
 		.poll = drm_poll,
 		.fasync = drm_fasync,
+#if defined(CONFIG_COMPAT) && LINUX_VERSION_CODE > KERNEL_VERSION(2,6,9)
+		.compat_ioctl = nouveau_compat_ioctl,
+#endif
 	},
 	.pci_driver = {
 		.name = DRIVER_NAME,
diff --git a/linux-core/nouveau_ioc32.c b/linux-core/nouveau_ioc32.c
new file mode 100644
index 00000000..a752a581
--- /dev/null
+++ b/linux-core/nouveau_ioc32.c
@@ -0,0 +1,73 @@
+/**
+ * \file mga_ioc32.c
+ *
+ * 32-bit ioctl compatibility routines for the MGA DRM.
+ *
+ * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
+ *
+ *
+ * Copyright (C) Paul Mackerras 2005
+ * Copyright (C) Egbert Eich 2003,2004
+ * Copyright (C) Dave Airlie 2005
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <linux/compat.h>
+#include <linux/ioctl32.h>
+
+#include "drmP.h"
+#include "drm.h"
+
+#include "nouveau_drm.h"
+
+/**
+ * Called whenever a 32-bit process running under a 64-bit kernel
+ * performs an ioctl on /dev/dri/card<n>.
+ *
+ * \param filp file pointer.
+ * \param cmd command.
+ * \param arg user argument.
+ * \return zero on success or negative number on failure.
+ */
+long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
+			 unsigned long arg)
+{
+	unsigned int nr = DRM_IOCTL_NR(cmd);
+	drm_ioctl_compat_t *fn = NULL;
+	int ret;
+
+	if (nr < DRM_COMMAND_BASE)
+		return drm_compat_ioctl(filp, cmd, arg);
+
+#if 0
+	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls))
+		fn = nouveau_compat_ioctls[nr - DRM_COMMAND_BASE];
+#endif
+	lock_kernel();	  /* XXX for now */
+	if (fn != NULL)
+		ret = (*fn)(filp, cmd, arg);
+	else
+		ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
diff --git a/shared-core/nouveau_drv.h b/shared-core/nouveau_drv.h
index 4b35e6d1..f579026a 100644
--- a/shared-core/nouveau_drv.h
+++ b/shared-core/nouveau_drv.h
@@ -171,6 +171,9 @@ extern void        nouveau_irq_preinstall(drm_device_t*);
 extern void        nouveau_irq_postinstall(drm_device_t*);
 extern void        nouveau_irq_uninstall(drm_device_t*);
 
+extern long nouveau_compat_ioctl(struct file *filp, unsigned int cmd,
+				unsigned long arg);
+
 #if defined(__powerpc__)
 #define NV_READ(reg)        in_be32((void __iomem *)(dev_priv->mmio)->handle + (reg) )
 #define NV_WRITE(reg,val)   out_be32((void __iomem *)(dev_priv->mmio)->handle + (reg) , (val) )
-- 
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