[PATCH 2/8] agp/intel-gtt: export the gtt pagetable iomapping

[daniel.vetter at ffwll.ch (Daniel Vetter)]

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

Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/char/agp/intel-gtt.c |    2 ++
 include/drm/intel-gtt.h      |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 0a305ac..71a55bd 100644
--- 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: ? */
 
@@ -1175,6 +1176,7 @@ static void gen6_write_entry(dma_addr_t addr, unsigned int entry,
 
 	/* gen6 has bit11-4 for physical addr bit39-32 */
 	addr |= (addr >> 28) & 0xff0;
+
 	writel(addr | pte_flags, intel_private.gtt + entry);
 }
 
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 6d4c77a..0a0001b 100644
--- 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);
-- 
1.7.6.3