fbdev: allow passing more than one aperture for handoff

It removes a hack from nouveau code which had to detect which
region to pass to kick vesafb/efifb.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 15 insertions, 2 deletions

diff --git a/include/linux/fb.h b/include/linux/fb.h
index c10163b4c40e..de5ff5fa8380 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -403,6 +403,7 @@ struct fb_cursor {
 #include <linux/notifier.h>
 #include <linux/list.h>
 #include <linux/backlight.h>
+#include <linux/slab.h>
 #include <asm/io.h>
 
 struct vm_area_struct;
@@ -862,10 +863,22 @@ struct fb_info {
         /* we need the PCI or similiar aperture base/size not
            smem_start/size as smem_start may just be an object
            allocated inside the aperture so may not actually overlap */
-        resource_size_t aperture_base;
-        resource_size_t aperture_size;
+        struct apertures_struct {
+                unsigned int count;
+                struct aperture {
+                        resource_size_t base;
+                        resource_size_t size;
+                } ranges[0];
+        } *apertures;
 };
 
+static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
+        struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
+                        + max_num * sizeof(struct aperture), GFP_KERNEL);
+        a->count = max_num;
+        return a;
+}
+
 #ifdef MODULE
 #define FBINFO_DEFAULT  FBINFO_MODULE
 #else