agp/intel-gtt: export the scratch page dma address

To implement a PPGTT for drm/i915 that fully aliases the GTT, we also
need to properly alias the scratch page.

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>

1 files changed, 4 insertions, 5 deletions

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index c92424ca1a55..0a305acb0374 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -76,7 +76,6 @@ static struct _intel_private {
         struct resource ifp_resource;
         int resource_valid;
         struct page *scratch_page;
-        dma_addr_t scratch_page_dma;
 } intel_private;
 
 #define INTEL_GTT_GEN   intel_private.driver->gen
@@ -306,9 +305,9 @@ static int intel_gtt_setup_scratch_page(void)
                 if (pci_dma_mapping_error(intel_private.pcidev, dma_addr))
                         return -EINVAL;
 
-                intel_private.scratch_page_dma = dma_addr;
+                intel_private.base.scratch_page_dma = dma_addr;
         } else
-                intel_private.scratch_page_dma = page_to_phys(page);
+                intel_private.base.scratch_page_dma = page_to_phys(page);
 
         intel_private.scratch_page = page;
 
@@ -631,7 +630,7 @@ static unsigned int intel_gtt_mappable_entries(void)
 static void intel_gtt_teardown_scratch_page(void)
 {
         set_pages_wb(intel_private.scratch_page, 1);
-        pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma,
+        pci_unmap_page(intel_private.pcidev, intel_private.base.scratch_page_dma,
                        PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
         put_page(intel_private.scratch_page);
         __free_page(intel_private.scratch_page);
@@ -975,7 +974,7 @@ void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries)
         unsigned int i;
 
         for (i = first_entry; i < (first_entry + num_entries); i++) {
-                intel_private.driver->write_entry(intel_private.scratch_page_dma,
+                intel_private.driver->write_entry(intel_private.base.scratch_page_dma,
                                                   i, 0);
         }
         readl(intel_private.gtt+i-1);