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-rw-r--r--drivers/char/agp/agp.h6
-rw-r--r--drivers/char/agp/backend.c20
-rw-r--r--drivers/char/agp/generic.c9
-rw-r--r--include/linux/agp_backend.h6
4 files changed, 40 insertions, 1 deletions
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index ce110a3..17e6d0d 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -121,6 +121,11 @@ struct agp_bridge_driver {
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 *);
+
+ int (*agp_map_page)(void *addr, dma_addr_t *ret);
+ void (*agp_unmap_page)(void *addr, dma_addr_t dma);
+ int (*agp_map_memory)(struct agp_memory *mem);
+ void (*agp_unmap_memory)(struct agp_memory *mem);
};
struct agp_bridge_data {
@@ -135,6 +140,7 @@ struct agp_bridge_data {
u32 *gatt_table_real;
unsigned long scratch_page;
unsigned long scratch_page_real;
+ dma_addr_t scratch_page_dma;
unsigned long gart_bus_addr;
unsigned long gatt_bus_addr;
u32 mode;
diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
index 3bd7e50..19ac366 100644
--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -152,6 +152,15 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
bridge->scratch_page_real = phys_to_gart(page_to_phys(page));
bridge->scratch_page = bridge->driver->mask_memory(bridge,
phys_to_gart(page_to_phys(page)), 0);
+
+ if (bridge->driver->agp_map_page &&
+ bridge->driver->agp_map_page(phys_to_virt(page_to_phys(page)),
+ &bridge->scratch_page_dma)) {
+ dev_err(&bridge->dev->dev,
+ "unable to dma-map scratch page\n");
+ rc = -ENOMEM;
+ goto err_out_nounmap;
+ }
}
size_value = bridge->driver->fetch_size();
@@ -191,6 +200,13 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
return 0;
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);
+ }
+err_out_nounmap:
if (bridge->driver->needs_scratch_page) {
void *va = gart_to_virt(bridge->scratch_page_real);
@@ -221,6 +237,10 @@ static void agp_backend_cleanup(struct agp_bridge_data *bridge)
bridge->driver->needs_scratch_page) {
void *va = gart_to_virt(bridge->scratch_page_real);
+ if (bridge->driver->agp_unmap_page)
+ bridge->driver->agp_unmap_page(va,
+ bridge->scratch_page_dma);
+
bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_UNMAP);
bridge->driver->agp_destroy_page(va, AGP_PAGE_DESTROY_FREE);
}
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index a3bcc7e..28f0208 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -437,6 +437,12 @@ int agp_bind_memory(struct agp_memory *curr, off_t pg_start)
curr->bridge->driver->cache_flush();
curr->is_flushed = true;
}
+
+ if (curr->bridge->driver->agp_map_memory) {
+ ret_val = curr->bridge->driver->agp_map_memory(curr);
+ if (ret_val)
+ return ret_val;
+ }
ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type);
if (ret_val != 0)
@@ -478,6 +484,9 @@ int agp_unbind_memory(struct agp_memory *curr)
if (ret_val != 0)
return ret_val;
+ if (curr->bridge->driver->agp_unmap_memory)
+ curr->bridge->driver->agp_unmap_memory(curr);
+
curr->is_bound = false;
curr->pg_start = 0;
spin_lock(&curr->bridge->mapped_lock);
diff --git a/include/linux/agp_backend.h b/include/linux/agp_backend.h
index 76fa794..8a294d6 100644
--- a/include/linux/agp_backend.h
+++ b/include/linux/agp_backend.h
@@ -79,9 +79,13 @@ struct agp_memory {
u32 physical;
bool is_bound;
bool is_flushed;
- bool vmalloc_flag;
+ bool vmalloc_flag;
+ bool sg_vmalloc_flag;
/* list of agp_memory mapped to the aperture */
struct list_head mapped_list;
+ /* DMA-mapped addresses */
+ struct scatterlist *sg_list;
+ int num_sg;
};
#define AGP_NORMAL_MEMORY 0