agp/intel-gtt: export the gtt pagetable iomapping

We need this because ppgtt page directory entries need to be in the
global gtt pagetable.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 0a305ac..5cf47ac 100644 (file)
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -680,6 +680,7 @@ static int intel_gtt_init(void)
                iounmap(intel_private.registers);
                return -ENOMEM;
        }
+       intel_private.base.gtt = intel_private.gtt;
 
        global_cache_flush();   /* FIXME: ? */
 

diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 6d4c77a..0a0001b 100644 (file)
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -17,6 +17,8 @@ const struct intel_gtt {
        unsigned int do_idle_maps : 1;
        /* Share the scratch page dma with ppgtts. */
        dma_addr_t scratch_page_dma;
+       /* for ppgtt PDE access */
+       u32 __iomem *gtt;
 } *intel_gtt_get(void);
 
 void intel_gtt_chipset_flush(void);