From 6397722f1990856a9ee268cadd65d78b44b24835 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@linux.ie>
Date: Tue, 28 Jun 2005 13:02:20 +0000
Subject: add compat code from Paul Mackerras

---
 linux-core/drmP.h        |  6 ++++++
 linux-core/drm_bufs.c    | 17 +++++++++++++++++
 linux-core/radeon_drv.c  |  3 +++
 shared-core/radeon_drv.h |  2 ++
 4 files changed, 28 insertions(+)

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index ff2af8cf..9c0e5b84 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -274,6 +274,9 @@ do {									\
 typedef int drm_ioctl_t(struct inode *inode, struct file *filp,
 			unsigned int cmd, unsigned long arg);
 
+typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
+			       unsigned long arg);
+
 typedef struct drm_ioctl_desc {
 	drm_ioctl_t *func;
 	int auth_needed;
@@ -758,6 +761,9 @@ extern void __exit drm_exit(struct drm_driver *driver);
 extern void __exit drm_cleanup_pci(struct pci_dev *pdev);
 extern int drm_ioctl(struct inode *inode, struct file *filp,
 		     unsigned int cmd, unsigned long arg);
+extern long drm_compat_ioctl(struct file *filp,
+			     unsigned int cmd, unsigned long arg);
+
 extern int drm_takedown(drm_device_t * dev);
 
 				/* Device support (drm_fops.h) */
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index b54aaeb8..d60d0823 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -109,6 +109,15 @@ int drm_initmap(drm_device_t * dev, unsigned int offset, unsigned int size,
 }
 EXPORT_SYMBOL(drm_initmap);
 
+#ifdef CONFIG_COMPAT
+/*
+ * Used to allocate 32-bit handles for _DRM_SHM regions
+ * The 0x10000000 value is chosen to be out of the way of
+ * FB/register and GART physical addresses.
+ */
+static unsigned int map32_handle = 0x10000000;
+#endif
+
 /**
  * Ioctl to specify a range of memory that is available for mapping by a non-root process.
  *
@@ -283,6 +292,13 @@ int drm_addmap(drm_device_t * dev, unsigned int offset,
 
 	down(&dev->struct_sem);
 	list_add(&list->head, &dev->maplist->head);
+#ifdef CONFIG_COMPAT
+	/* Assign a 32-bit handle for _DRM_SHM mappings */
+	/* We do it here so that dev->struct_sem protects the increment */
+	if (map->type == _DRM_SHM)
+		map->offset = map32_handle += PAGE_SIZE;
+#endif
+
 	up(&dev->struct_sem);
       found_it:
 	*map_ptr = map;
@@ -1568,3 +1584,4 @@ int drm_order( unsigned long size )
 }
 EXPORT_SYMBOL(drm_order);
 
+
diff --git a/linux-core/radeon_drv.c b/linux-core/radeon_drv.c
index 21f29fc4..7b1aa59e 100644
--- a/linux-core/radeon_drv.c
+++ b/linux-core/radeon_drv.c
@@ -102,6 +102,9 @@ static struct drm_driver driver = {
 		.mmap = drm_mmap,
 		.poll = drm_poll,
 		.fasync = drm_fasync,
+#ifdef CONFIG_COMPAT
+		.compat_ioctl = radeon_compat_ioctl,
+#endif
 		},
 	.pci_driver = {
 		.name = DRIVER_NAME,
diff --git a/shared-core/radeon_drv.h b/shared-core/radeon_drv.h
index 242f3cf2..8b05aab8 100644
--- a/shared-core/radeon_drv.h
+++ b/shared-core/radeon_drv.h
@@ -311,6 +311,8 @@ extern int radeon_driver_open_helper(drm_device_t * dev,
 				     drm_file_t * filp_priv);
 extern void radeon_driver_free_filp_priv(drm_device_t * dev,
 					 drm_file_t * filp_priv);
+extern long radeon_compat_ioctl(struct file *filp, unsigned int cmd,
+					 unsigned long arg);
 
 /* Flags for stats.boxes
  */
-- 
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