1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_ioc32.c b/drivers/gpu/drm/nouveau/nouveau_ioc32.c
new file mode 100644
index 000000000000..a2c30f4611ba
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_ioc32.c
@@ -0,0 +1,72 @@
+/**
+ * \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 "drmP.h"
+#include "drm.h"
+
+#include "nouveau_drv.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;
+}