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>

1 files changed, 23 insertions, 26 deletions

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;