agp: Switch agp_{un,}map_page() to take struct page * argument

Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/char/agp/agp.h

@@ -122,8 +122,8 @@ struct agp_bridge_driver {
 	int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
 	void (*chipset_flush)(struct agp_bridge_data *);
 
-	int (*agp_map_page)(void *addr, dma_addr_t *ret);
-	void (*agp_unmap_page)(void *addr, dma_addr_t dma);
+	int (*agp_map_page)(struct page *page, dma_addr_t *ret);
+	void (*agp_unmap_page)(struct page *page, dma_addr_t dma);
 	int (*agp_map_memory)(struct agp_memory *mem);
 	void (*agp_unmap_memory)(struct agp_memory *mem);
 };
@@ -139,7 +139,7 @@ struct agp_bridge_data {
 	u32 __iomem *gatt_table;
 	u32 *gatt_table_real;
 	unsigned long scratch_page;
-	unsigned long scratch_page_real;
+	struct page *scratch_page_page;
 	dma_addr_t scratch_page_dma;
 	unsigned long gart_bus_addr;
 	unsigned long gatt_bus_addr;

drivers/char/agp/backend.c

@@ -149,9 +149,9 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
 			return -ENOMEM;
 		}
 
-		bridge->scratch_page_real = phys_to_gart(page_to_phys(page));
+		bridge->scratch_page_page = page;
 		if (bridge->driver->agp_map_page) {
-			if (bridge->driver->agp_map_page(phys_to_virt(page_to_phys(page)),
+			if (bridge->driver->agp_map_page(page,
 							 &bridge->scratch_page_dma)) {
 				dev_err(&bridge->dev->dev,
 					"unable to dma-map scratch page\n");
@@ -205,13 +205,12 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
 err_out:
 	if (bridge->driver->needs_scratch_page &&
 	    bridge->driver->agp_unmap_page) {
-		void *va = gart_to_virt(bridge->scratch_page_real);
-
-		bridge->driver->agp_unmap_page(va, bridge->scratch_page_dma);
+		bridge->driver->agp_unmap_page(bridge->scratch_page_page,
+					       bridge->scratch_page_dma);
 	}
 err_out_nounmap:
 	if (bridge->driver->needs_scratch_page) {
-		void *va = gart_to_virt(bridge->scratch_page_real);
+		void *va = page_address(bridge->scratch_page_page);
 
 		bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_UNMAP);
 		bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_FREE);
@@ -238,11 +237,11 @@ static void agp_backend_cleanup(struct agp_bridge_data *bridge)
 
 	if (bridge->driver->agp_destroy_page &&
 	    bridge->driver->needs_scratch_page) {
-		void *va = gart_to_virt(bridge->scratch_page_real);
+		void *va = page_address(bridge->scratch_page_page);
 
 		if (bridge->driver->agp_unmap_page)
-			bridge->driver->agp_unmap_page(va,
-					       bridge->scratch_page_dma);
+			bridge->driver->agp_unmap_page(bridge->scratch_page_page,
+						       bridge->scratch_page_dma);
 
 		bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_UNMAP);
 		bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_FREE);

drivers/char/agp/intel-agp.c

@@ -181,19 +181,19 @@ static struct _intel_private {
 } intel_private;
 
 #ifdef USE_PCI_DMA_API
-static int intel_agp_map_page(void *addr, dma_addr_t *ret)
+static int intel_agp_map_page(struct page *page, dma_addr_t *ret)
 {
-	*ret = pci_map_single(intel_private.pcidev, addr,
-			      PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	*ret = pci_map_page(intel_private.pcidev, page, 0,
+			    PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 	if (pci_dma_mapping_error(intel_private.pcidev, *ret))
 		return -EINVAL;
 	return 0;
 }
 
-static void intel_agp_unmap_page(void *addr, dma_addr_t dma)
+static void intel_agp_unmap_page(struct page *page, dma_addr_t dma)
 {
-	pci_unmap_single(intel_private.pcidev, dma,
-			 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	pci_unmap_page(intel_private.pcidev, dma,
+		       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 }
 
 static int intel_agp_map_memory(struct agp_memory *mem)