intel_agp: fix GTT map size on G33

G33 has 1MB GTT table range.  Fix GTT mapping in case like 512MB aperture
size.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
Acked-by: Dave Airlie <airlied@linux.ie>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 581f9222a9d..7c69bf259ca 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -919,6 +919,7 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
         struct aper_size_info_fixed *size;
         int num_entries;
         u32 temp, temp2;
+        int gtt_map_size = 256 * 1024;
 
         size = agp_bridge->current_size;
         page_order = size->page_order;
@@ -928,7 +929,9 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
         pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &temp);
         pci_read_config_dword(intel_private.pcidev, I915_PTEADDR,&temp2);
 
-        intel_private.gtt = ioremap(temp2, 256 * 1024);
+        if (IS_G33)
+            gtt_map_size = 1024 * 1024; /* 1M on G33 */
+        intel_private.gtt = ioremap(temp2, gtt_map_size);
         if (!intel_private.gtt)
                 return -ENOMEM;