*/
EXPORT_SYMBOL_GPL(agp_memory_reserved);
-#if defined(CONFIG_X86)
-int map_page_into_agp(struct page *page)
-{
- int i;
- i = change_page_attr(page, 1, PAGE_KERNEL_NOCACHE);
- /* Caller's responsibility to call global_flush_tlb() for
- * performance reasons */
- return i;
-}
-EXPORT_SYMBOL_GPL(map_page_into_agp);
-
-int unmap_page_from_agp(struct page *page)
-{
- int i;
- i = change_page_attr(page, 1, PAGE_KERNEL);
- /* Caller's responsibility to call global_flush_tlb() for
- * performance reasons */
- return i;
-}
-EXPORT_SYMBOL_GPL(unmap_page_from_agp);
-#endif
-
/*
* Generic routines for handling agp_memory structures -
* They use the basic page allocation routines to do the brunt of the work.
return -1;
}
+/*
+ * Use kmalloc if possible for the page list. Otherwise fall back to
+ * vmalloc. This speeds things up and also saves memory for small AGP
+ * regions.
+ */
+
+void agp_alloc_page_array(size_t size, struct agp_memory *mem)
+{
+ mem->memory = NULL;
+ mem->vmalloc_flag = 0;
+
+ if (size <= 2*PAGE_SIZE)
+ mem->memory = kmalloc(size, GFP_KERNEL | __GFP_NORETRY);
+ if (mem->memory == NULL) {
+ mem->memory = vmalloc(size);
+ mem->vmalloc_flag = 1;
+ }
+}
+EXPORT_SYMBOL(agp_alloc_page_array);
+
+void agp_free_page_array(struct agp_memory *mem)
+{
+ if (mem->vmalloc_flag) {
+ vfree(mem->memory);
+ } else {
+ kfree(mem->memory);
+ }
+}
+EXPORT_SYMBOL(agp_free_page_array);
+
+
+static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages)
+{
+ struct agp_memory *new;
+ unsigned long alloc_size = num_agp_pages*sizeof(struct page *);
+
+ new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL);
+ if (new == NULL)
+ return NULL;
+
+ new->key = agp_get_key();
+
+ if (new->key < 0) {
+ kfree(new);
+ return NULL;
+ }
+
+ agp_alloc_page_array(alloc_size, new);
+
+ if (new->memory == NULL) {
+ agp_free_key(new->key);
+ kfree(new);
+ return NULL;
+ }
+ new->num_scratch_pages = 0;
+ return new;
+}
struct agp_memory *agp_create_memory(int scratch_pages)
{
kfree(new);
return NULL;
}
- new->memory = vmalloc(PAGE_SIZE * scratch_pages);
+
+ agp_alloc_page_array(PAGE_SIZE * scratch_pages, new);
if (new->memory == NULL) {
agp_free_key(new->key);
return NULL;
}
new->num_scratch_pages = scratch_pages;
+ new->type = AGP_NORMAL_MEMORY;
return new;
}
EXPORT_SYMBOL(agp_create_memory);
if (curr->is_bound == TRUE)
agp_unbind_memory(curr);
+ if (curr->type >= AGP_USER_TYPES) {
+ agp_generic_free_by_type(curr);
+ return;
+ }
+
if (curr->type != 0) {
curr->bridge->driver->free_by_type(curr);
return;
flush_agp_mappings();
}
agp_free_key(curr->key);
- vfree(curr->memory);
+ agp_free_page_array(curr);
kfree(curr);
}
EXPORT_SYMBOL(agp_free_memory);
if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp)
return NULL;
+ if (type >= AGP_USER_TYPES) {
+ new = agp_generic_alloc_user(page_count, type);
+ if (new)
+ new->bridge = bridge;
+ return new;
+ }
+
if (type != 0) {
new = bridge->driver->alloc_by_type(page_count, type);
if (new)
off_t j;
void *temp;
struct agp_bridge_data *bridge;
+ int mask_type;
bridge = mem->bridge;
if (!bridge)
num_entries -= agp_memory_reserved/PAGE_SIZE;
if (num_entries < 0) num_entries = 0;
- if (type != 0 || mem->type != 0) {
+ if (type != mem->type)
+ return -EINVAL;
+
+ mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
+ if (mask_type != 0) {
/* The generic routines know nothing of memory types */
return -EINVAL;
}
}
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
- writel(bridge->driver->mask_memory(bridge, mem->memory[i], mem->type), bridge->gatt_table+j);
+ writel(bridge->driver->mask_memory(bridge, mem->memory[i], mask_type),
+ bridge->gatt_table+j);
}
readl(bridge->gatt_table+j-1); /* PCI Posting. */
{
size_t i;
struct agp_bridge_data *bridge;
+ int mask_type;
bridge = mem->bridge;
if (!bridge)
if (mem->page_count == 0)
return 0;
- if (type != 0 || mem->type != 0) {
+ if (type != mem->type)
+ return -EINVAL;
+
+ mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
+ if (mask_type != 0) {
/* The generic routines know nothing of memory types */
return -EINVAL;
}
}
EXPORT_SYMBOL(agp_generic_remove_memory);
-
struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type)
{
return NULL;
}
EXPORT_SYMBOL(agp_generic_alloc_by_type);
-
void agp_generic_free_by_type(struct agp_memory *curr)
{
- vfree(curr->memory);
+ agp_free_page_array(curr);
agp_free_key(curr->key);
kfree(curr);
}
EXPORT_SYMBOL(agp_generic_free_by_type);
+struct agp_memory *agp_generic_alloc_user(size_t page_count, int type)
+{
+ struct agp_memory *new;
+ int i;
+ int pages;
+
+ pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE;
+ new = agp_create_user_memory(page_count);
+ if (new == NULL)
+ return NULL;
+
+ for (i = 0; i < page_count; i++)
+ new->memory[i] = 0;
+ new->page_count = 0;
+ new->type = type;
+ new->num_scratch_pages = pages;
+
+ return new;
+}
+EXPORT_SYMBOL(agp_generic_alloc_user);
/*
* Basic Page Allocation Routines -
}
EXPORT_SYMBOL(agp_generic_mask_memory);
+int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
+ int type)
+{
+ if (type >= AGP_USER_TYPES)
+ return 0;
+ return type;
+}
+EXPORT_SYMBOL(agp_generic_type_to_mask_type);
+
/*
* These functions are implemented according to the AGPv3 spec,
* which covers implementation details that had previously been
}
EXPORT_SYMBOL(agp3_generic_cleanup);
-struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] =
+const struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] =
{
{4096, 1048576, 10,0x000},
{2048, 524288, 9, 0x800},
projects / cascardo / linux.git / blobdiff