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authorDave Airlie <airlied@starflyer.(none)>2005-08-05 22:11:22 +1000
committerDave Airlie <airlied@linux.ie>2005-08-05 22:11:22 +1000
commitd1f2b55ad2c11f46e30547a9f7754e99b478348e (patch)
treecabf9060c4f6cb419c7ed7fdcbcc6b6a91a83ac1 /drivers/char/drm/drm_scatter.c
parentc73681e77b40697d16ada777adf2c6dc4db05917 (diff)
drm: updated DRM map patch for 32/64 bit systems
I basically combined Paul's patches with additions that I had made for PCI scatter gather. I also tried more carefully to avoid problems with the same token assigned multiple times while trying to use the base address in the token if possible to gain as much backward compatibility as possible for broken DRI clients. From: Paul Mackerras <paulus@samba.org> and Egbert Eich <eich@suse.de> Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char/drm/drm_scatter.c')
-rw-r--r--drivers/char/drm/drm_scatter.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/char/drm/drm_scatter.c b/drivers/char/drm/drm_scatter.c
index 54fddb6ea2d..ed267d49bc6 100644
--- a/drivers/char/drm/drm_scatter.c
+++ b/drivers/char/drm/drm_scatter.c
@@ -61,6 +61,12 @@ void drm_sg_cleanup( drm_sg_mem_t *entry )
DRM_MEM_SGLISTS );
}
+#ifdef _LP64
+# define ScatterHandle(x) (unsigned int)((x >> 32) + (x & ((1L << 32) - 1)))
+#else
+# define ScatterHandle(x) (unsigned int)(x)
+#endif
+
int drm_sg_alloc( struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg )
{
@@ -133,12 +139,13 @@ int drm_sg_alloc( struct inode *inode, struct file *filp,
*/
memset( entry->virtual, 0, pages << PAGE_SHIFT );
- entry->handle = (unsigned long)entry->virtual;
+ entry->handle = ScatterHandle((unsigned long)entry->virtual);
DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle );
DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual );
- for ( i = entry->handle, j = 0 ; j < pages ; i += PAGE_SIZE, j++ ) {
+ for (i = (unsigned long)entry->virtual, j = 0; j < pages;
+ i += PAGE_SIZE, j++) {
entry->pagelist[j] = vmalloc_to_page((void *)i);
if (!entry->pagelist[j])
goto failed;