agp: switch AGP to use page array instead of unsigned long array

This switches AGP to use an array of pages for tracking the
pages allocated to the GART. This should enable GEM on PAE to work
a lot better as we can pass highmem pages to the PAT code and it will
do the right thing with them.

Signed-off-by: Dave Airlie <airlied@redhat.com>

21 files changed, 152 insertions, 146 deletions

diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index 46f507531177..178e2e9e9f09 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -107,7 +107,7 @@ struct agp_bridge_driver {
 	void (*agp_enable)(struct agp_bridge_data *, u32);
 	void (*cleanup)(void);
 	void (*tlb_flush)(struct agp_memory *);
-	unsigned long (*mask_memory)(struct agp_bridge_data *, unsigned long, int);
+	unsigned long (*mask_memory)(struct agp_bridge_data *, struct page *, int);
 	void (*cache_flush)(void);
 	int (*create_gatt_table)(struct agp_bridge_data *);
 	int (*free_gatt_table)(struct agp_bridge_data *);
@@ -115,9 +115,9 @@ struct agp_bridge_driver {
 	int (*remove_memory)(struct agp_memory *, off_t, int);
 	struct agp_memory *(*alloc_by_type) (size_t, int);
 	void (*free_by_type)(struct agp_memory *);
-	void *(*agp_alloc_page)(struct agp_bridge_data *);
+	struct page *(*agp_alloc_page)(struct agp_bridge_data *);
 	int (*agp_alloc_pages)(struct agp_bridge_data *, struct agp_memory *, size_t);
-	void (*agp_destroy_page)(void *, int flags);
+	void (*agp_destroy_page)(struct page *, int flags);
 	void (*agp_destroy_pages)(struct agp_memory *);
 	int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
 	void (*chipset_flush)(struct agp_bridge_data *);
@@ -278,10 +278,10 @@ int agp_generic_insert_memory(struct agp_memory *mem, off_t pg_start, int type);
 int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type);
 struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type);
 void agp_generic_free_by_type(struct agp_memory *curr);
-void *agp_generic_alloc_page(struct agp_bridge_data *bridge);
+struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge);
 int agp_generic_alloc_pages(struct agp_bridge_data *agp_bridge,
 			    struct agp_memory *memory, size_t page_count);
-void agp_generic_destroy_page(void *addr, int flags);
+void agp_generic_destroy_page(struct page *page, int flags);
 void agp_generic_destroy_pages(struct agp_memory *memory);
 void agp_free_key(int key);
 int agp_num_entries(void);
@@ -291,7 +291,7 @@ int agp_3_5_enable(struct agp_bridge_data *bridge);
 void global_cache_flush(void);
 void get_agp_version(struct agp_bridge_data *bridge);
 unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
-	unsigned long addr, int type);
+				      struct page *page, int type);
 int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
 				  int type);
 struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev);
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c
index 58f26ed2a96b..201ef3ffd484 100644
--- a/drivers/char/agp/ali-agp.c
+++ b/drivers/char/agp/ali-agp.c
@@ -141,37 +141,37 @@ static void m1541_cache_flush(void)
 	}
 }
 
-static void *m1541_alloc_page(struct agp_bridge_data *bridge)
+static struct page *m1541_alloc_page(struct agp_bridge_data *bridge)
 {
-	void *addr = agp_generic_alloc_page(agp_bridge);
+	struct page *page = agp_generic_alloc_page(agp_bridge);
 	u32 temp;
 
-	if (!addr)
+	if (!page)
 		return NULL;
 
 	pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 	pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 			(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
-			  virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN ));
-	return addr;
+			  phys_to_gart(page_to_phys(page))) | ALI_CACHE_FLUSH_EN ));
+	return page;
 }
 
-static void ali_destroy_page(void * addr, int flags)
+static void ali_destroy_page(struct page *page, int flags)
 {
-	if (addr) {
+	if (page) {
 		if (flags & AGP_PAGE_DESTROY_UNMAP) {
 			global_cache_flush();	/* is this really needed?  --hch */
-			agp_generic_destroy_page(addr, flags);
+			agp_generic_destroy_page(page, flags);
 		} else
-			agp_generic_destroy_page(addr, flags);
+			agp_generic_destroy_page(page, flags);
 	}
 }
 
-static void m1541_destroy_page(void * addr, int flags)
+static void m1541_destroy_page(struct page *page, int flags)
 {
 	u32 temp;
 
-	if (addr == NULL)
+	if (page == NULL)
 		return;
 
 	if (flags & AGP_PAGE_DESTROY_UNMAP) {
@@ -180,9 +180,9 @@ static void m1541_destroy_page(void * addr, int flags)
 		pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 		pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 				       (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
-					 virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
+					 phys_to_gart(page_to_phys(page))) | ALI_CACHE_FLUSH_EN));
 	}
-	agp_generic_destroy_page(addr, flags);
+	agp_generic_destroy_page(page, flags);
 }
 
 
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index 3f98254b911f..ba9bde71eaaf 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -325,7 +325,7 @@ static int amd_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
 		addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 		cur_gatt = GET_GATT(addr);
 		writel(agp_generic_mask_memory(agp_bridge,
-			mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
+			mem->pages[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 		readl(cur_gatt+GET_GATT_OFF(addr));	/* PCI Posting. */
 	}
 	amd_irongate_tlbflush(mem);
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index d765afda9c2a..3bf5dda90f4a 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -79,7 +79,7 @@ static int amd64_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		tmp = agp_bridge->driver->mask_memory(agp_bridge,
-			mem->memory[i], mask_type);
+			mem->pages[i], mask_type);
 
 		BUG_ON(tmp & 0xffffff0000000ffcULL);
 		pte = (tmp & 0x000000ff00000000ULL) >> 28;
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c
index f1537eece07f..4d38baa209f5 100644
--- a/drivers/char/agp/ati-agp.c
+++ b/drivers/char/agp/ati-agp.c
@@ -296,8 +296,9 @@ static int ati_insert_memory(struct agp_memory * mem,
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 		cur_gatt = GET_GATT(addr);
-		writel(agp_bridge->driver->mask_memory(agp_bridge,
-			mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
+		writel(agp_bridge->driver->mask_memory(agp_bridge,	
+						       mem->pages[i], mem->type),
+		       cur_gatt+GET_GATT_OFF(addr));
 		readl(cur_gatt+GET_GATT_OFF(addr));	/* PCI Posting. */
 	}
 	agp_bridge->driver->tlb_flush(mem);
diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
index 8c617ad7497f..cfa5a649dfe7 100644
--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -141,17 +141,17 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
 	bridge->version = &agp_current_version;
 
 	if (bridge->driver->needs_scratch_page) {
-		void *addr = bridge->driver->agp_alloc_page(bridge);
+		struct page *page = bridge->driver->agp_alloc_page(bridge);
 
-		if (!addr) {
+		if (!page) {
 			dev_err(&bridge->dev->dev,
 				"can't get memory for scratch page\n");
 			return -ENOMEM;
 		}
 
-		bridge->scratch_page_real = virt_to_gart(addr);
+		bridge->scratch_page_real = phys_to_gart(page_to_phys(page));
 		bridge->scratch_page =
-		    bridge->driver->mask_memory(bridge, bridge->scratch_page_real, 0);
+		    bridge->driver->mask_memory(bridge, page, 0);
 	}
 
 	size_value = bridge->driver->fetch_size();
diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index 453543a1f293..35d50f2861b6 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -65,8 +65,9 @@ static const struct gatt_mask efficeon_generic_masks[] =
 };
 
 /* This function does the same thing as mask_memory() for this chipset... */
-static inline unsigned long efficeon_mask_memory(unsigned long addr)
+static inline unsigned long efficeon_mask_memory(struct page *page)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	return addr | 0x00000001;
 }
 
@@ -257,7 +258,7 @@ static int efficeon_insert_memory(struct agp_memory * mem, off_t pg_start, int t
 	last_page = NULL;
 	for (i = 0; i < count; i++) {
 		int index = pg_start + i;
-		unsigned long insert = efficeon_mask_memory(mem->memory[i]);
+		unsigned long insert = efficeon_mask_memory(mem->pages[i]);
 
 		page = (unsigned int *) efficeon_private.l1_table[index >> 10];
 
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 2224b762b7fb..1e8b461b91f1 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -95,13 +95,13 @@ EXPORT_SYMBOL(agp_flush_chipset);
 
 void agp_alloc_page_array(size_t size, struct agp_memory *mem)
 {
-	mem->memory = NULL;
+	mem->pages = NULL;
 	mem->vmalloc_flag = false;
 
 	if (size <= 2*PAGE_SIZE)
-		mem->memory = kmalloc(size, GFP_KERNEL | __GFP_NORETRY);
-	if (mem->memory == NULL) {
-		mem->memory = vmalloc(size);
+		mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NORETRY);
+	if (mem->pages == NULL) {
+		mem->pages = vmalloc(size);
 		mem->vmalloc_flag = true;
 	}
 }
@@ -110,9 +110,9 @@ EXPORT_SYMBOL(agp_alloc_page_array);
 void agp_free_page_array(struct agp_memory *mem)
 {
 	if (mem->vmalloc_flag) {
-		vfree(mem->memory);
+		vfree(mem->pages);
 	} else {
-		kfree(mem->memory);
+		kfree(mem->pages);
 	}
 }
 EXPORT_SYMBOL(agp_free_page_array);
@@ -136,7 +136,7 @@ static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages)
 
 	agp_alloc_page_array(alloc_size, new);
 
-	if (new->memory == NULL) {
+	if (new->pages == NULL) {
 		agp_free_key(new->key);
 		kfree(new);
 		return NULL;
@@ -162,7 +162,7 @@ struct agp_memory *agp_create_memory(int scratch_pages)
 
 	agp_alloc_page_array(PAGE_SIZE * scratch_pages, new);
 
-	if (new->memory == NULL) {
+	if (new->pages == NULL) {
 		agp_free_key(new->key);
 		kfree(new);
 		return NULL;
@@ -206,15 +206,13 @@ void agp_free_memory(struct agp_memory *curr)
 		} else {
 
 			for (i = 0; i < curr->page_count; i++) {
-				curr->memory[i] = (unsigned long)gart_to_virt(
-					curr->memory[i]);
 				curr->bridge->driver->agp_destroy_page(
-					(void *)curr->memory[i],
+					curr->pages[i],
 					AGP_PAGE_DESTROY_UNMAP);
 			}
 			for (i = 0; i < curr->page_count; i++) {
 				curr->bridge->driver->agp_destroy_page(
-					(void *)curr->memory[i],
+					curr->pages[i],
 					AGP_PAGE_DESTROY_FREE);
 			}
 		}
@@ -282,13 +280,13 @@ struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge,
 	}
 
 	for (i = 0; i < page_count; i++) {
-		void *addr = bridge->driver->agp_alloc_page(bridge);
+		struct page *page = bridge->driver->agp_alloc_page(bridge);
 
-		if (addr == NULL) {
+		if (page == NULL) {
 			agp_free_memory(new);
 			return NULL;
 		}
-		new->memory[i] = virt_to_gart(addr);
+		new->pages[i] = page;
 		new->page_count++;
 	}
 	new->bridge = bridge;
@@ -1134,7 +1132,7 @@ int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type)
 	}
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
-		writel(bridge->driver->mask_memory(bridge, mem->memory[i], mask_type),
+		writel(bridge->driver->mask_memory(bridge, mem->pages[i], mask_type),
 		       bridge->gatt_table+j);
 	}
 	readl(bridge->gatt_table+j-1);	/* PCI Posting. */
@@ -1204,7 +1202,7 @@ struct agp_memory *agp_generic_alloc_user(size_t page_count, int type)
 		return NULL;
 
 	for (i = 0; i < page_count; i++)
-		new->memory[i] = 0;
+		new->pages[i] = 0;
 	new->page_count = 0;
 	new->type = type;
 	new->num_scratch_pages = pages;
@@ -1237,23 +1235,20 @@ int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *m
 		get_page(page);
 		atomic_inc(&agp_bridge->current_memory_agp);
 
-		/* set_memory_array_uc() needs virtual address */
-		mem->memory[i] = (unsigned long)page_address(page);
+		mem->pages[i] = page;
 		mem->page_count++;
 	}
 
 #ifdef CONFIG_X86
-	set_memory_array_uc(mem->memory, num_pages);
+	set_pages_array_uc(mem->pages, num_pages);
 #endif
 	ret = 0;
 out:
-	for (i = 0; i < mem->page_count; i++)
-		mem->memory[i] = virt_to_gart((void *)mem->memory[i]);
 	return ret;
 }
 EXPORT_SYMBOL(agp_generic_alloc_pages);
 
-void *agp_generic_alloc_page(struct agp_bridge_data *bridge)
+struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge)
 {
 	struct page * page;
 
@@ -1265,56 +1260,47 @@ void *agp_generic_alloc_page(struct agp_bridge_data *bridge)
 
 	get_page(page);
 	atomic_inc(&agp_bridge->current_memory_agp);
-	return page_address(page);
+	return page;
 }
 EXPORT_SYMBOL(agp_generic_alloc_page);
 
 void agp_generic_destroy_pages(struct agp_memory *mem)
 {
 	int i;
-	void *addr;
 	struct page *page;
 
 	if (!mem)
 		return;
 
-	for (i = 0; i < mem->page_count; i++)
-		mem->memory[i] = (unsigned long)gart_to_virt(mem->memory[i]);
-
 #ifdef CONFIG_X86
-	set_memory_array_wb(mem->memory, mem->page_count);
+	set_pages_array_wb(mem->pages, mem->page_count);
 #endif
 
 	for (i = 0; i < mem->page_count; i++) {
-		addr = (void *)mem->memory[i];
-		page = virt_to_page(addr);
+		page = mem->pages[i];
 
 #ifndef CONFIG_X86
 		unmap_page_from_agp(page);
 #endif
-
 		put_page(page);
-		free_page((unsigned long)addr);
+		__free_page(page);
 		atomic_dec(&agp_bridge->current_memory_agp);
-		mem->memory[i] = 0;
+		mem->pages[i] = NULL;
 	}
 }
 EXPORT_SYMBOL(agp_generic_destroy_pages);
 
-void agp_generic_destroy_page(void *addr, int flags)
+void agp_generic_destroy_page(struct page *page, int flags)
 {
-	struct page *page;
-
-	if (addr == NULL)
+	if (page == NULL)
 		return;
 
-	page = virt_to_page(addr);
 	if (flags & AGP_PAGE_DESTROY_UNMAP)
 		unmap_page_from_agp(page);
 
 	if (flags & AGP_PAGE_DESTROY_FREE) {
 		put_page(page);
-		free_page((unsigned long)addr);
+		__free_page(page);
 		atomic_dec(&agp_bridge->current_memory_agp);
 	}
 }
@@ -1361,8 +1347,9 @@ void global_cache_flush(void)
 EXPORT_SYMBOL(global_cache_flush);
 
 unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
-	unsigned long addr, int type)
+				      struct page *page, int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	/* memory type is ignored in the generic routine */
 	if (bridge->driver->masks)
 		return addr | bridge->driver->masks[0].mask;
diff --git a/drivers/char/agp/hp-agp.c b/drivers/char/agp/hp-agp.c
index 183ac3fe44fb..abea273dcc2f 100644
--- a/drivers/char/agp/hp-agp.c
+++ b/drivers/char/agp/hp-agp.c
@@ -361,13 +361,11 @@ hp_zx1_insert_memory (struct agp_memory *mem, off_t pg_start, int type)
 	for (i = 0, j = io_pg_start; i < mem->page_count; i++) {
 		unsigned long paddr;
 
-		paddr = mem->memory[i];
+		paddr = page_to_phys(mem->pages[i]);
 		for (k = 0;
 		     k < hp->io_pages_per_kpage;
 		     k++, j++, paddr += hp->io_page_size) {
-			hp->gatt[j] =
-				agp_bridge->driver->mask_memory(agp_bridge,
-					paddr, type);
+			hp->gatt[j] = HP_ZX1_PDIR_VALID_BIT | paddr;
 		}
 	}
 
@@ -397,8 +395,9 @@ hp_zx1_remove_memory (struct agp_memory *mem, off_t pg_start, int type)
 
 static unsigned long
 hp_zx1_mask_memory (struct agp_bridge_data *bridge,
-	unsigned long addr, int type)
+		    struct page *page, int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	return HP_ZX1_PDIR_VALID_BIT | addr;
 }
 
diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c
index 10da687d131a..60cc35bb5db7 100644
--- a/drivers/char/agp/i460-agp.c
+++ b/drivers/char/agp/i460-agp.c
@@ -60,6 +60,9 @@
  */
 #define WR_FLUSH_GATT(index)	RD_GATT(index)
 
+static unsigned long i460_mask_memory (struct agp_bridge_data *bridge,
+				       unsigned long addr, int type);
+
 static struct {
 	void *gatt;				/* ioremap'd GATT area */
 
@@ -74,6 +77,7 @@ static struct {
 		unsigned long *alloced_map;	/* bitmap of kernel-pages in use */
 		int refcount;			/* number of kernel pages using the large page */
 		u64 paddr;			/* physical address of large page */
+		struct page *page; 		/* page pointer */
 	} *lp_desc;
 } i460;
 
@@ -294,7 +298,7 @@ static int i460_insert_memory_small_io_page (struct agp_memory *mem,
 	void *temp;
 
 	pr_debug("i460_insert_memory_small_io_page(mem=%p, pg_start=%ld, type=%d, paddr0=0x%lx)\n",
-		 mem, pg_start, type, mem->memory[0]);
+		 mem, pg_start, type, page_to_phys(mem->pages[0]));
 
 	if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
 		return -EINVAL;
@@ -321,10 +325,9 @@ static int i460_insert_memory_small_io_page (struct agp_memory *mem,
 
 	io_page_size = 1UL << I460_IO_PAGE_SHIFT;
 	for (i = 0, j = io_pg_start; i < mem->page_count; i++) {
-		paddr = mem->memory[i];
+		paddr = phys_to_gart(page_to_phys(mem->pages[i]));
 		for (k = 0; k < I460_IOPAGES_PER_KPAGE; k++, j++, paddr += io_page_size)
-			WR_GATT(j, agp_bridge->driver->mask_memory(agp_bridge,
-				paddr, mem->type));
+			WR_GATT(j, i460_mask_memory(agp_bridge, paddr, mem->type));
 	}
 	WR_FLUSH_GATT(j - 1);
 	return 0;
@@ -364,10 +367,9 @@ static int i460_alloc_large_page (struct lp_desc *lp)
 {
 	unsigned long order = I460_IO_PAGE_SHIFT - PAGE_SHIFT;
 	size_t map_size;
-	void *lpage;
 
-	lpage = (void *) __get_free_pages(GFP_KERNEL, order);
-	if (!lpage) {
+	lp->page = alloc_pages(GFP_KERNEL, order);
+	if (!lp->page) {
 		printk(KERN_ERR PFX "Couldn't alloc 4M GART page...\n");
 		return -ENOMEM;
 	}
@@ -375,12 +377,12 @@ static int i460_alloc_large_page (struct lp_desc *lp)
 	map_size = ((I460_KPAGES_PER_IOPAGE + BITS_PER_LONG - 1) & -BITS_PER_LONG)/8;
 	lp->alloced_map = kzalloc(map_size, GFP_KERNEL);
 	if (!lp->alloced_map) {
-		free_pages((unsigned long) lpage, order);
+		__free_pages(lp->page, order);
 		printk(KERN_ERR PFX "Out of memory, we're in trouble...\n");
 		return -ENOMEM;
 	}
 
-	lp->paddr = virt_to_gart(lpage);
+	lp->paddr = phys_to_gart(page_to_phys(lp->page));
 	lp->refcount = 0;
 	atomic_add(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp);
 	return 0;
@@ -391,7 +393,7 @@ static void i460_free_large_page (struct lp_desc *lp)
 	kfree(lp->alloced_map);
 	lp->alloced_map = NULL;
 
-	free_pages((unsigned long) gart_to_virt(lp->paddr), I460_IO_PAGE_SHIFT - PAGE_SHIFT);
+	__free_pages(lp->page, I460_IO_PAGE_SHIFT - PAGE_SHIFT);
 	atomic_sub(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp);
 }
 
@@ -439,8 +441,8 @@ static int i460_insert_memory_large_io_page (struct agp_memory *mem,
 			if (i460_alloc_large_page(lp) < 0)
 				return -ENOMEM;
 			pg = lp - i460.lp_desc;
-			WR_GATT(pg, agp_bridge->driver->mask_memory(agp_bridge,
-				lp->paddr, 0));
+			WR_GATT(pg, i460_mask_memory(agp_bridge,
+						     lp->paddr, 0));
 			WR_FLUSH_GATT(pg);
 		}
 
@@ -448,7 +450,7 @@ static int i460_insert_memory_large_io_page (struct agp_memory *mem,
 		     idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE);
 		     idx++, i++)
 		{
-			mem->memory[i] = lp->paddr + idx*PAGE_SIZE;
+			mem->pages[i] = lp->page;
 			__set_bit(idx, lp->alloced_map);
 			++lp->refcount;
 		}
@@ -463,7 +465,7 @@ static int i460_remove_memory_large_io_page (struct agp_memory *mem,
 	struct lp_desc *start, *end, *lp;
 	void *temp;
 
-	temp = agp_bridge->driver->current_size;
+	temp = agp_bridge->current_size;
 	num_entries = A_SIZE_8(temp)->num_entries;
 
 	/* Figure out what pg_start means in terms of our large GART pages */
@@ -477,7 +479,7 @@ static int i460_remove_memory_large_io_page (struct agp_memory *mem,
 		     idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE);
 		     idx++, i++)
 		{
-			mem->memory[i] = 0;
+			mem->pages[i] = NULL;
 			__clear_bit(idx, lp->alloced_map);
 			--lp->refcount;
 		}
@@ -521,7 +523,7 @@ static int i460_remove_memory (struct agp_memory *mem,
  * Let's just hope nobody counts on the allocated AGP memory being there before bind time
  * (I don't think current drivers do)...
  */
-static void *i460_alloc_page (struct agp_bridge_data *bridge)
+static struct page *i460_alloc_page (struct agp_bridge_data *bridge)
 {
 	void *page;
 
@@ -534,7 +536,7 @@ static void *i460_alloc_page (struct agp_bridge_data *bridge)
 	return page;
 }
 
-static void i460_destroy_page (void *page, int flags)
+static void i460_destroy_page (struct page *page, int flags)
 {
 	if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) {
 		agp_generic_destroy_page(page, flags);
@@ -544,13 +546,20 @@ static void i460_destroy_page (void *page, int flags)
 #endif /* I460_LARGE_IO_PAGES */
 
 static unsigned long i460_mask_memory (struct agp_bridge_data *bridge,
-	unsigned long addr, int type)
+				       unsigned long addr, int type)
 {
 	/* Make sure the returned address is a valid GATT entry */
 	return bridge->driver->masks[0].mask
 		| (((addr & ~((1 << I460_IO_PAGE_SHIFT) - 1)) & 0xfffff000) >> 12);
 }
 
+static unsigned long i460_page_mask_memory(struct agp_bridge_data *bridge,
+					   struct page *page, int type)
+{
+	unsigned long addr = phys_to_gart(page_to_phys(page));
+	return i460_mask_memory(bridge, addr, type);
+}
+
 const struct agp_bridge_driver intel_i460_driver = {
 	.owner			= THIS_MODULE,
 	.aperture_sizes		= i460_sizes,
@@ -560,7 +569,7 @@ const struct agp_bridge_driver intel_i460_driver = {
 	.fetch_size		= i460_fetch_size,
 	.cleanup		= i460_cleanup,
 	.tlb_flush		= i460_tlb_flush,
-	.mask_memory		= i460_mask_memory,
+	.mask_memory		= i460_page_mask_memory,
 	.masks			= i460_masks,
 	.agp_enable		= agp_generic_enable,
 	.cache_flush		= global_cache_flush,
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 7a748fa0dfce..35977bfb6999 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -257,7 +257,7 @@ static void intel_i810_agp_enable(struct agp_bridge_data *bridge, u32 mode)
 }
 
 /* Exists to support ARGB cursors */
-static void *i8xx_alloc_pages(void)
+static struct page *i8xx_alloc_pages(void)
 {
 	struct page *page;
 
@@ -272,17 +272,14 @@ static void *i8xx_alloc_pages(void)
 	}
 	get_page(page);
 	atomic_inc(&agp_bridge->current_memory_agp);
-	return page_address(page);
+	return page;
 }
 
-static void i8xx_destroy_pages(void *addr)
+static void i8xx_destroy_pages(struct page *page)
 {
-	struct page *page;
-
-	if (addr == NULL)
+	if (page == NULL)
 		return;
 
-	page = virt_to_page(addr);
 	set_pages_wb(page, 4);
 	put_page(page);
 	__free_pages(page, 2);
@@ -346,7 +343,7 @@ static int intel_i810_insert_entries(struct agp_memory *mem, off_t pg_start,
 			global_cache_flush();
 		for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 			writel(agp_bridge->driver->mask_memory(agp_bridge,
-							       mem->memory[i],
+							       mem->pages[i],
 							       mask_type),
 			       intel_private.registers+I810_PTE_BASE+(j*4));
 		}
@@ -389,37 +386,37 @@ static int intel_i810_remove_entries(struct agp_memory *mem, off_t pg_start,
 static struct agp_memory *alloc_agpphysmem_i8xx(size_t pg_count, int type)
 {
 	struct agp_memory *new;
-	void *addr;
+	struct page *page;
 
 	switch (pg_count) {
-	case 1: addr = agp_bridge->driver->agp_alloc_page(agp_bridge);
+	case 1: page = agp_bridge->driver->agp_alloc_page(agp_bridge);
 		break;
 	case 4:
 		/* kludge to get 4 physical pages for ARGB cursor */
-		addr = i8xx_alloc_pages();
+		page = i8xx_alloc_pages();
 		break;
 	default:
 		return NULL;
 	}
 
-	if (addr == NULL)
+	if (page == NULL)
 		return NULL;
 
 	new = agp_create_memory(pg_count);
 	if (new == NULL)
 		return NULL;
 
-	new->memory[0] = virt_to_gart(addr);
+	new->pages[0] = page;
 	if (pg_count == 4) {
 		/* kludge to get 4 physical pages for ARGB cursor */
-		new->memory[1] = new->memory[0] + PAGE_SIZE;
-		new->memory[2] = new->memory[1] + PAGE_SIZE;
-		new->memory[3] = new->memory[2] + PAGE_SIZE;
+		new->pages[1] = new->pages[0] + 1;
+		new->pages[2] = new->pages[1] + 1;
+		new->pages[3] = new->pages[2] + 1;
 	}
 	new->page_count = pg_count;
 	new->num_scratch_pages = pg_count;
 	new->type = AGP_PHYS_MEMORY;
-	new->physical = new->memory[0];
+	new->physical = page_to_phys(new->pages[0]);
 	return new;
 }
 
@@ -451,13 +448,11 @@ static void intel_i810_free_by_type(struct agp_memory *curr)
 	agp_free_key(curr->key);
 	if (curr->type == AGP_PHYS_MEMORY) {
 		if (curr->page_count == 4)
-			i8xx_destroy_pages(gart_to_virt(curr->memory[0]));
+			i8xx_destroy_pages(curr->pages[0]);
 		else {
-			void *va = gart_to_virt(curr->memory[0]);
-
-			agp_bridge->driver->agp_destroy_page(va,
+			agp_bridge->driver->agp_destroy_page(curr->pages[0],
 							     AGP_PAGE_DESTROY_UNMAP);
-			agp_bridge->driver->agp_destroy_page(va,
+			agp_bridge->driver->agp_destroy_page(curr->pages[0],
 							     AGP_PAGE_DESTROY_FREE);
 		}
 		agp_free_page_array(curr);
@@ -466,8 +461,9 @@ static void intel_i810_free_by_type(struct agp_memory *curr)
 }
 
 static unsigned long intel_i810_mask_memory(struct agp_bridge_data *bridge,
-	unsigned long addr, int type)
+					    struct page *page, int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	/* Type checking must be done elsewhere */
 	return addr | bridge->driver->masks[type].mask;
 }
@@ -855,7 +851,7 @@ static int intel_i830_insert_entries(struct agp_memory *mem, off_t pg_start,
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		writel(agp_bridge->driver->mask_memory(agp_bridge,
-						       mem->memory[i], mask_type),
+						       mem->pages[i], mask_type),
 		       intel_private.registers+I810_PTE_BASE+(j*4));
 	}
 	readl(intel_private.registers+I810_PTE_BASE+((j-1)*4));
@@ -1085,7 +1081,7 @@ static int intel_i915_insert_entries(struct agp_memory *mem, off_t pg_start,
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		writel(agp_bridge->driver->mask_memory(agp_bridge,
-			mem->memory[i], mask_type), intel_private.gtt+j);
+						       mem->pages[i], mask_type), intel_private.gtt+j);
 	}
 
 	readl(intel_private.gtt+j-1);
@@ -1200,8 +1196,9 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
  * this conditional.
  */
 static unsigned long intel_i965_mask_memory(struct agp_bridge_data *bridge,
-	unsigned long addr, int type)
+					    struct page *page, int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	/* Shift high bits down */
 	addr |= (addr >> 28) & 0xf0;
 
diff --git a/drivers/char/agp/nvidia-agp.c b/drivers/char/agp/nvidia-agp.c
index 16acee2de117..263d71dd441c 100644
--- a/drivers/char/agp/nvidia-agp.c
+++ b/drivers/char/agp/nvidia-agp.c
@@ -225,7 +225,7 @@ static int nvidia_insert_memory(struct agp_memory *mem, off_t pg_start, int type
 	}
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		writel(agp_bridge->driver->mask_memory(agp_bridge,
-			mem->memory[i], mask_type),
+			mem->pages[i], mask_type),
 			agp_bridge->gatt_table+nvidia_private.pg_offset+j);
 	}
 
diff --git a/drivers/char/agp/parisc-agp.c b/drivers/char/agp/parisc-agp.c
index 699e3422ad93..f4bb43fb8016 100644
--- a/drivers/char/agp/parisc-agp.c
+++ b/drivers/char/agp/parisc-agp.c
@@ -31,6 +31,10 @@
 #define AGP8X_MODE_BIT		3
 #define AGP8X_MODE		(1 << AGP8X_MODE_BIT)
 
+static unsigned long
+parisc_agp_mask_memory(struct agp_bridge_data *bridge, unsigned long addr,
+		       int type);
+
 static struct _parisc_agp_info {
 	void __iomem *ioc_regs;
 	void __iomem *lba_regs;
@@ -149,12 +153,12 @@ parisc_agp_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
 	for (i = 0, j = io_pg_start; i < mem->page_count; i++) {
 		unsigned long paddr;
 
-		paddr = mem->memory[i];
+		paddr = page_to_phys(mem->pages[i]);
 		for (k = 0;
 		     k < info->io_pages_per_kpage;
 		     k++, j++, paddr += info->io_page_size) {
 			info->gatt[j] =
-				agp_bridge->driver->mask_memory(agp_bridge,
+				parisc_agp_mask_memory(agp_bridge,
 					paddr, type);
 		}
 	}
@@ -185,9 +189,17 @@ parisc_agp_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
 }
 
 static unsigned long
-parisc_agp_mask_memory(struct agp_bridge_data *bridge,
-		    unsigned long addr, int type)
+parisc_agp_mask_memory(struct agp_bridge_data *bridge, unsigned long addr,
+		       int type)
+{
+	return SBA_PDIR_VALID_BIT | addr;
+}
+
+static unsigned long
+parisc_agp_page_mask_memory(struct agp_bridge_data *bridge, struct page *page,
+			    int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	return SBA_PDIR_VALID_BIT | addr;
 }
 
diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c
index b972d83bb1b2..d3ea2e4226b5 100644
--- a/drivers/char/agp/sgi-agp.c
+++ b/drivers/char/agp/sgi-agp.c
@@ -38,7 +38,7 @@ static struct aper_size_info_fixed sgi_tioca_sizes[] = {
 	{0, 0, 0},
 };
 
-static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
+static struct page *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
 {
 	struct page *page;
 	int nid;
@@ -52,7 +52,7 @@ static void *sgi_tioca_alloc_page(struct agp_bridge_data *bridge)
 
 	get_page(page);
 	atomic_inc(&agp_bridge->current_memory_agp);
-	return page_address(page);
+	return page;
 }
 
 /*
@@ -71,8 +71,9 @@ static void sgi_tioca_tlbflush(struct agp_memory *mem)
  */
 static unsigned long
 sgi_tioca_mask_memory(struct agp_bridge_data *bridge,
-		      unsigned long addr, int type)
+		      struct page *page, int type)
 {
+	unsigned long addr = phys_to_gart(page_to_phys(page));
 	return tioca_physpage_to_gart(addr);
 }
 
@@ -189,7 +190,7 @@ static int sgi_tioca_insert_memory(struct agp_memory *mem, off_t pg_start,
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		table[j] =
-		    bridge->driver->mask_memory(bridge, mem->memory[i],
+		    bridge->driver->mask_memory(bridge, mem->pages[i],
 						mem->type);
 	}
 
diff --git a/drivers/char/agp/sworks-agp.c b/drivers/char/agp/sworks-agp.c
index 6224df8b7f0a..b964a2199329 100644
--- a/drivers/char/agp/sworks-agp.c
+++ b/drivers/char/agp/sworks-agp.c
@@ -349,7 +349,7 @@ static int serverworks_insert_memory(struct agp_memory *mem,
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 		cur_gatt = SVRWRKS_GET_GATT(addr);
-		writel(agp_bridge->driver->mask_memory(agp_bridge, mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
+		writel(agp_bridge->driver->mask_memory(agp_bridge, mem->pages[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 	}
 	serverworks_tlbflush(mem);
 	return 0;
diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
index 880d3f6d5b98..f192c3b9ad41 100644
--- a/drivers/char/agp/uninorth-agp.c
+++ b/drivers/char/agp/uninorth-agp.c
@@ -173,9 +173,9 @@ static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start,
 
 	for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 		agp_bridge->gatt_table[j] =
-		    cpu_to_le32((mem->memory[i] & 0xFFFFF000UL) | 0x1UL);
-		flush_dcache_range((unsigned long)__va(mem->memory[i]),
-				   (unsigned long)__va(mem->memory[i])+0x1000);
+			cpu_to_le32((page_to_phys(mem->pages[i]) & 0xFFFFF000UL) | 0x1UL);
+		flush_dcache_range((unsigned long)__va(page_to_phys(mem->pages[i])),
+				   (unsigned long)__va(page_to_phys(mem->pages[i]))+0x1000);
 	}
 	(void)in_le32((volatile u32*)&agp_bridge->gatt_table[pg_start]);
 	mb();
@@ -219,9 +219,9 @@ static int u3_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
 	}
 
 	for (i = 0; i < mem->page_count; i++) {
-		gp[i] = (mem->memory[i] >> PAGE_SHIFT) | 0x80000000UL;
-		flush_dcache_range((unsigned long)__va(mem->memory[i]),
-				   (unsigned long)__va(mem->memory[i])+0x1000);
+		gp[i] = (page_to_phys(mem->pages[i]) >> PAGE_SHIFT) | 0x80000000UL;
+		flush_dcache_range((unsigned long)__va(page_to_phys(mem->pages[i])),
+				   (unsigned long)__va(page_to_phys(mem->pages[i]))+0x1000);
 	}
 	mb();
 	flush_dcache_range((unsigned long)gp, (unsigned long) &gp[i]);
diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index 7a0d042c8d6a..d68888fe3df9 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -482,7 +482,7 @@ drm_agp_bind_pages(struct drm_device *dev,
 	}
 
 	for (i = 0; i < num_pages; i++)
-		mem->memory[i] = phys_to_gart(page_to_phys(pages[i]));
+		mem->pages[i] = pages[i];
 	mem->page_count = num_pages;
 
 	mem->is_flushed = true;
diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
index 0a436184dd88..e4865f99989c 100644
--- a/drivers/gpu/drm/drm_memory.c
+++ b/drivers/gpu/drm/drm_memory.c
@@ -59,10 +59,11 @@ int drm_mem_info(char *buf, char **start, off_t offset,
 static void *agp_remap(unsigned long offset, unsigned long size,
 		       struct drm_device * dev)
 {
-	unsigned long *phys_addr_map, i, num_pages =
+	unsigned long i, num_pages =
 	    PAGE_ALIGN(size) / PAGE_SIZE;
 	struct drm_agp_mem *agpmem;
 	struct page **page_map;
+	struct page **phys_page_map;
 	void *addr;
 
 	size = PAGE_ALIGN(size);
@@ -89,10 +90,9 @@ static void *agp_remap(unsigned long offset, unsigned long size,
 	if (!page_map)
 		return NULL;
 
-	phys_addr_map =
-	    agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
+	phys_page_map = (agpmem->memory->pages + (offset - agpmem->bound) / PAGE_SIZE);
 	for (i = 0; i < num_pages; ++i)
-		page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
+		page_map[i] = phys_page_map[i];
 	addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
 	vfree(page_map);
 
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index f95d03ac9784..7e1fbe5d4779 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -144,14 +144,14 @@ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 		 * Get the page, inc the use count, and return it
 		 */
 		offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
-		page = virt_to_page(__va(agpmem->memory->memory[offset]));
+		page = agpmem->memory->pages[offset];
 		get_page(page);
 		vmf->page = page;
 
 		DRM_DEBUG
 		    ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n",
 		     (unsigned long long)baddr,
-		     __va(agpmem->memory->memory[offset]),
+		     agpmem->memory->pages[offset],
 		     (unsigned long long)offset,
 		     page_count(page));
 		return 0;
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index e8f6d2229d8c..4648ed2f0143 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -63,8 +63,7 @@ static int ttm_agp_populate(struct ttm_backend *backend,
 		if (!page)
 			page = dummy_read_page;
 
-		mem->memory[mem->page_count++] =
-		    phys_to_gart(page_to_phys(page));
+		mem->pages[mem->page_count++] = page;
 	}
 	agp_be->mem = mem;
 	return 0;
diff --git a/include/linux/agp_backend.h b/include/linux/agp_backend.h
index 2b8df8b420fd..76fa794fdac0 100644
--- a/include/linux/agp_backend.h
+++ b/include/linux/agp_backend.h
@@ -70,7 +70,7 @@ struct agp_memory {
 	struct agp_memory *next;
 	struct agp_memory *prev;
 	struct agp_bridge_data *bridge;
-	unsigned long *memory;
+	struct page **pages;
 	size_t page_count;
 	int key;
 	int num_scratch_pages;