![Wang, Yalin](/assets/img/avatar_default.png)
Change agp_free_page_array to use kvfree function, remove the duplicated code. Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
1425 lines
36 KiB
C
1425 lines
36 KiB
C
/*
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* AGPGART driver.
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* Copyright (C) 2004 Silicon Graphics, Inc.
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* Copyright (C) 2002-2005 Dave Jones.
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* Copyright (C) 1999 Jeff Hartmann.
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* Copyright (C) 1999 Precision Insight, Inc.
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* Copyright (C) 1999 Xi Graphics, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* TODO:
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* - Allocate more than order 0 pages to avoid too much linear map splitting.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/pagemap.h>
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#include <linux/miscdevice.h>
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#include <linux/pm.h>
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#include <linux/agp_backend.h>
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#include <linux/vmalloc.h>
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#include <linux/dma-mapping.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <asm/cacheflush.h>
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#include <asm/pgtable.h>
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#include "agp.h"
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__u32 *agp_gatt_table;
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int agp_memory_reserved;
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/*
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* Needed by the Nforce GART driver for the time being. Would be
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* nice to do this some other way instead of needing this export.
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*/
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EXPORT_SYMBOL_GPL(agp_memory_reserved);
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/*
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* Generic routines for handling agp_memory structures -
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* They use the basic page allocation routines to do the brunt of the work.
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*/
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void agp_free_key(int key)
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{
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if (key < 0)
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return;
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if (key < MAXKEY)
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clear_bit(key, agp_bridge->key_list);
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}
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EXPORT_SYMBOL(agp_free_key);
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static int agp_get_key(void)
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{
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int bit;
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bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY);
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if (bit < MAXKEY) {
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set_bit(bit, agp_bridge->key_list);
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return bit;
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}
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return -1;
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}
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/*
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* Use kmalloc if possible for the page list. Otherwise fall back to
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* vmalloc. This speeds things up and also saves memory for small AGP
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* regions.
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*/
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void agp_alloc_page_array(size_t size, struct agp_memory *mem)
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{
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mem->pages = NULL;
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if (size <= 2*PAGE_SIZE)
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mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
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if (mem->pages == NULL) {
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mem->pages = vmalloc(size);
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}
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}
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EXPORT_SYMBOL(agp_alloc_page_array);
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static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages)
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{
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struct agp_memory *new;
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unsigned long alloc_size = num_agp_pages*sizeof(struct page *);
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if (INT_MAX/sizeof(struct page *) < num_agp_pages)
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return NULL;
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new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL);
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if (new == NULL)
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return NULL;
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new->key = agp_get_key();
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if (new->key < 0) {
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kfree(new);
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return NULL;
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}
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agp_alloc_page_array(alloc_size, new);
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if (new->pages == NULL) {
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agp_free_key(new->key);
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kfree(new);
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return NULL;
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}
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new->num_scratch_pages = 0;
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return new;
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}
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struct agp_memory *agp_create_memory(int scratch_pages)
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{
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struct agp_memory *new;
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new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL);
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if (new == NULL)
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return NULL;
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new->key = agp_get_key();
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if (new->key < 0) {
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kfree(new);
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return NULL;
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}
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agp_alloc_page_array(PAGE_SIZE * scratch_pages, new);
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if (new->pages == NULL) {
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agp_free_key(new->key);
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kfree(new);
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return NULL;
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}
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new->num_scratch_pages = scratch_pages;
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new->type = AGP_NORMAL_MEMORY;
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return new;
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}
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EXPORT_SYMBOL(agp_create_memory);
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/**
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* agp_free_memory - free memory associated with an agp_memory pointer.
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*
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* @curr: agp_memory pointer to be freed.
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*
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* It is the only function that can be called when the backend is not owned
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* by the caller. (So it can free memory on client death.)
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*/
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void agp_free_memory(struct agp_memory *curr)
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{
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size_t i;
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if (curr == NULL)
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return;
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if (curr->is_bound)
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agp_unbind_memory(curr);
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if (curr->type >= AGP_USER_TYPES) {
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agp_generic_free_by_type(curr);
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return;
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}
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if (curr->type != 0) {
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curr->bridge->driver->free_by_type(curr);
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return;
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}
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if (curr->page_count != 0) {
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if (curr->bridge->driver->agp_destroy_pages) {
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curr->bridge->driver->agp_destroy_pages(curr);
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} else {
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for (i = 0; i < curr->page_count; i++) {
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curr->bridge->driver->agp_destroy_page(
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curr->pages[i],
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AGP_PAGE_DESTROY_UNMAP);
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}
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for (i = 0; i < curr->page_count; i++) {
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curr->bridge->driver->agp_destroy_page(
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curr->pages[i],
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AGP_PAGE_DESTROY_FREE);
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}
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}
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}
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agp_free_key(curr->key);
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agp_free_page_array(curr);
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kfree(curr);
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}
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EXPORT_SYMBOL(agp_free_memory);
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#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
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/**
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* agp_allocate_memory - allocate a group of pages of a certain type.
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*
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* @page_count: size_t argument of the number of pages
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* @type: u32 argument of the type of memory to be allocated.
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*
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* Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which
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* maps to physical ram. Any other type is device dependent.
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*
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* It returns NULL whenever memory is unavailable.
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*/
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struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge,
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size_t page_count, u32 type)
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{
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int scratch_pages;
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struct agp_memory *new;
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size_t i;
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int cur_memory;
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if (!bridge)
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return NULL;
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cur_memory = atomic_read(&bridge->current_memory_agp);
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if ((cur_memory + page_count > bridge->max_memory_agp) ||
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(cur_memory + page_count < page_count))
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return NULL;
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if (type >= AGP_USER_TYPES) {
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new = agp_generic_alloc_user(page_count, type);
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if (new)
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new->bridge = bridge;
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return new;
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}
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if (type != 0) {
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new = bridge->driver->alloc_by_type(page_count, type);
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if (new)
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new->bridge = bridge;
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return new;
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}
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scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE;
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new = agp_create_memory(scratch_pages);
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if (new == NULL)
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return NULL;
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if (bridge->driver->agp_alloc_pages) {
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if (bridge->driver->agp_alloc_pages(bridge, new, page_count)) {
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agp_free_memory(new);
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return NULL;
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}
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new->bridge = bridge;
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return new;
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}
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for (i = 0; i < page_count; i++) {
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struct page *page = bridge->driver->agp_alloc_page(bridge);
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if (page == NULL) {
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agp_free_memory(new);
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return NULL;
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}
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new->pages[i] = page;
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new->page_count++;
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}
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new->bridge = bridge;
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return new;
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}
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EXPORT_SYMBOL(agp_allocate_memory);
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/* End - Generic routines for handling agp_memory structures */
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static int agp_return_size(void)
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{
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int current_size;
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void *temp;
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temp = agp_bridge->current_size;
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switch (agp_bridge->driver->size_type) {
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case U8_APER_SIZE:
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current_size = A_SIZE_8(temp)->size;
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break;
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case U16_APER_SIZE:
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current_size = A_SIZE_16(temp)->size;
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break;
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case U32_APER_SIZE:
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current_size = A_SIZE_32(temp)->size;
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break;
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case LVL2_APER_SIZE:
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current_size = A_SIZE_LVL2(temp)->size;
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break;
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case FIXED_APER_SIZE:
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current_size = A_SIZE_FIX(temp)->size;
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break;
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default:
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current_size = 0;
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break;
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}
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current_size -= (agp_memory_reserved / (1024*1024));
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if (current_size <0)
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current_size = 0;
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return current_size;
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}
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int agp_num_entries(void)
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{
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int num_entries;
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void *temp;
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temp = agp_bridge->current_size;
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switch (agp_bridge->driver->size_type) {
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case U8_APER_SIZE:
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num_entries = A_SIZE_8(temp)->num_entries;
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break;
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case U16_APER_SIZE:
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num_entries = A_SIZE_16(temp)->num_entries;
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break;
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case U32_APER_SIZE:
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num_entries = A_SIZE_32(temp)->num_entries;
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break;
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case LVL2_APER_SIZE:
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num_entries = A_SIZE_LVL2(temp)->num_entries;
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break;
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case FIXED_APER_SIZE:
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num_entries = A_SIZE_FIX(temp)->num_entries;
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break;
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default:
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num_entries = 0;
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break;
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}
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num_entries -= agp_memory_reserved>>PAGE_SHIFT;
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if (num_entries<0)
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num_entries = 0;
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return num_entries;
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}
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EXPORT_SYMBOL_GPL(agp_num_entries);
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/**
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* agp_copy_info - copy bridge state information
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*
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* @info: agp_kern_info pointer. The caller should insure that this pointer is valid.
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*
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* This function copies information about the agp bridge device and the state of
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* the agp backend into an agp_kern_info pointer.
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*/
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int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info)
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{
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memset(info, 0, sizeof(struct agp_kern_info));
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if (!bridge) {
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info->chipset = NOT_SUPPORTED;
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return -EIO;
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}
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info->version.major = bridge->version->major;
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info->version.minor = bridge->version->minor;
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info->chipset = SUPPORTED;
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info->device = bridge->dev;
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if (bridge->mode & AGPSTAT_MODE_3_0)
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info->mode = bridge->mode & ~AGP3_RESERVED_MASK;
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else
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info->mode = bridge->mode & ~AGP2_RESERVED_MASK;
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info->aper_base = bridge->gart_bus_addr;
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info->aper_size = agp_return_size();
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info->max_memory = bridge->max_memory_agp;
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info->current_memory = atomic_read(&bridge->current_memory_agp);
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info->cant_use_aperture = bridge->driver->cant_use_aperture;
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info->vm_ops = bridge->vm_ops;
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info->page_mask = ~0UL;
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return 0;
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}
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EXPORT_SYMBOL(agp_copy_info);
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/* End - Routine to copy over information structure */
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/*
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* Routines for handling swapping of agp_memory into the GATT -
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* These routines take agp_memory and insert them into the GATT.
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* They call device specific routines to actually write to the GATT.
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*/
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/**
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* agp_bind_memory - Bind an agp_memory structure into the GATT.
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*
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* @curr: agp_memory pointer
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* @pg_start: an offset into the graphics aperture translation table
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*
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* It returns -EINVAL if the pointer == NULL.
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* It returns -EBUSY if the area of the table requested is already in use.
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*/
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int agp_bind_memory(struct agp_memory *curr, off_t pg_start)
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{
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int ret_val;
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if (curr == NULL)
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return -EINVAL;
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if (curr->is_bound) {
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printk(KERN_INFO PFX "memory %p is already bound!\n", curr);
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return -EINVAL;
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}
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if (!curr->is_flushed) {
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curr->bridge->driver->cache_flush();
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curr->is_flushed = true;
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}
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ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type);
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if (ret_val != 0)
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return ret_val;
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curr->is_bound = true;
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curr->pg_start = pg_start;
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spin_lock(&agp_bridge->mapped_lock);
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list_add(&curr->mapped_list, &agp_bridge->mapped_list);
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spin_unlock(&agp_bridge->mapped_lock);
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return 0;
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}
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EXPORT_SYMBOL(agp_bind_memory);
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/**
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* agp_unbind_memory - Removes an agp_memory structure from the GATT
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*
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* @curr: agp_memory pointer to be removed from the GATT.
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*
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* It returns -EINVAL if this piece of agp_memory is not currently bound to
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* the graphics aperture translation table or if the agp_memory pointer == NULL
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*/
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int agp_unbind_memory(struct agp_memory *curr)
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{
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int ret_val;
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if (curr == NULL)
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return -EINVAL;
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if (!curr->is_bound) {
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printk(KERN_INFO PFX "memory %p was not bound!\n", curr);
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return -EINVAL;
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}
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ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type);
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if (ret_val != 0)
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return ret_val;
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curr->is_bound = false;
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curr->pg_start = 0;
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spin_lock(&curr->bridge->mapped_lock);
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list_del(&curr->mapped_list);
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spin_unlock(&curr->bridge->mapped_lock);
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return 0;
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}
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EXPORT_SYMBOL(agp_unbind_memory);
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/* End - Routines for handling swapping of agp_memory into the GATT */
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/* Generic Agp routines - Start */
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static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat)
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{
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u32 tmp;
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if (*requested_mode & AGP2_RESERVED_MASK) {
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printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n",
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*requested_mode & AGP2_RESERVED_MASK, *requested_mode);
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*requested_mode &= ~AGP2_RESERVED_MASK;
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}
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/*
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* Some dumb bridges are programmed to disobey the AGP2 spec.
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* This is likely a BIOS misprogramming rather than poweron default, or
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* it would be a lot more common.
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* https://bugs.freedesktop.org/show_bug.cgi?id=8816
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* AGPv2 spec 6.1.9 states:
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* The RATE field indicates the data transfer rates supported by this
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* device. A.G.P. devices must report all that apply.
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* Fix them up as best we can.
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*/
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switch (*bridge_agpstat & 7) {
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case 4:
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*bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X);
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printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate. "
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"Fixing up support for x2 & x1\n");
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break;
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case 2:
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*bridge_agpstat |= AGPSTAT2_1X;
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printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate. "
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"Fixing up support for x1\n");
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break;
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default:
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break;
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}
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/* Check the speed bits make sense. Only one should be set. */
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tmp = *requested_mode & 7;
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switch (tmp) {
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case 0:
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printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm);
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*requested_mode |= AGPSTAT2_1X;
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break;
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case 1:
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case 2:
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break;
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case 3:
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*requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */
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break;
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case 4:
|
|
break;
|
|
case 5:
|
|
case 6:
|
|
case 7:
|
|
*requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/
|
|
break;
|
|
}
|
|
|
|
/* disable SBA if it's not supported */
|
|
if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA)))
|
|
*bridge_agpstat &= ~AGPSTAT_SBA;
|
|
|
|
/* Set rate */
|
|
if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X)))
|
|
*bridge_agpstat &= ~AGPSTAT2_4X;
|
|
|
|
if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X)))
|
|
*bridge_agpstat &= ~AGPSTAT2_2X;
|
|
|
|
if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X)))
|
|
*bridge_agpstat &= ~AGPSTAT2_1X;
|
|
|
|
/* Now we know what mode it should be, clear out the unwanted bits. */
|
|
if (*bridge_agpstat & AGPSTAT2_4X)
|
|
*bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */
|
|
|
|
if (*bridge_agpstat & AGPSTAT2_2X)
|
|
*bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */
|
|
|
|
if (*bridge_agpstat & AGPSTAT2_1X)
|
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */
|
|
|
|
/* Apply any errata. */
|
|
if (agp_bridge->flags & AGP_ERRATA_FASTWRITES)
|
|
*bridge_agpstat &= ~AGPSTAT_FW;
|
|
|
|
if (agp_bridge->flags & AGP_ERRATA_SBA)
|
|
*bridge_agpstat &= ~AGPSTAT_SBA;
|
|
|
|
if (agp_bridge->flags & AGP_ERRATA_1X) {
|
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X);
|
|
*bridge_agpstat |= AGPSTAT2_1X;
|
|
}
|
|
|
|
/* If we've dropped down to 1X, disable fast writes. */
|
|
if (*bridge_agpstat & AGPSTAT2_1X)
|
|
*bridge_agpstat &= ~AGPSTAT_FW;
|
|
}
|
|
|
|
/*
|
|
* requested_mode = Mode requested by (typically) X.
|
|
* bridge_agpstat = PCI_AGP_STATUS from agp bridge.
|
|
* vga_agpstat = PCI_AGP_STATUS from graphic card.
|
|
*/
|
|
static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat)
|
|
{
|
|
u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat;
|
|
u32 tmp;
|
|
|
|
if (*requested_mode & AGP3_RESERVED_MASK) {
|
|
printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n",
|
|
*requested_mode & AGP3_RESERVED_MASK, *requested_mode);
|
|
*requested_mode &= ~AGP3_RESERVED_MASK;
|
|
}
|
|
|
|
/* Check the speed bits make sense. */
|
|
tmp = *requested_mode & 7;
|
|
if (tmp == 0) {
|
|
printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm);
|
|
*requested_mode |= AGPSTAT3_4X;
|
|
}
|
|
if (tmp >= 3) {
|
|
printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4);
|
|
*requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X;
|
|
}
|
|
|
|
/* ARQSZ - Set the value to the maximum one.
|
|
* Don't allow the mode register to override values. */
|
|
*bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) |
|
|
max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ)));
|
|
|
|
/* Calibration cycle.
|
|
* Don't allow the mode register to override values. */
|
|
*bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) |
|
|
min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK)));
|
|
|
|
/* SBA *must* be supported for AGP v3 */
|
|
*bridge_agpstat |= AGPSTAT_SBA;
|
|
|
|
/*
|
|
* Set speed.
|
|
* Check for invalid speeds. This can happen when applications
|
|
* written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware
|
|
*/
|
|
if (*requested_mode & AGPSTAT_MODE_3_0) {
|
|
/*
|
|
* Caller hasn't a clue what it is doing. Bridge is in 3.0 mode,
|
|
* have been passed a 3.0 mode, but with 2.x speed bits set.
|
|
* AGP2.x 4x -> AGP3.0 4x.
|
|
*/
|
|
if (*requested_mode & AGPSTAT2_4X) {
|
|
printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n",
|
|
current->comm, *requested_mode);
|
|
*requested_mode &= ~AGPSTAT2_4X;
|
|
*requested_mode |= AGPSTAT3_4X;
|
|
}
|
|
} else {
|
|
/*
|
|
* The caller doesn't know what they are doing. We are in 3.0 mode,
|
|
* but have been passed an AGP 2.x mode.
|
|
* Convert AGP 1x,2x,4x -> AGP 3.0 4x.
|
|
*/
|
|
printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n",
|
|
current->comm, *requested_mode);
|
|
*requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X);
|
|
*requested_mode |= AGPSTAT3_4X;
|
|
}
|
|
|
|
if (*requested_mode & AGPSTAT3_8X) {
|
|
if (!(*bridge_agpstat & AGPSTAT3_8X)) {
|
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
|
|
*bridge_agpstat |= AGPSTAT3_4X;
|
|
printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm);
|
|
return;
|
|
}
|
|
if (!(*vga_agpstat & AGPSTAT3_8X)) {
|
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
|
|
*bridge_agpstat |= AGPSTAT3_4X;
|
|
printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm);
|
|
return;
|
|
}
|
|
/* All set, bridge & device can do AGP x8*/
|
|
*bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD);
|
|
goto done;
|
|
|
|
} else if (*requested_mode & AGPSTAT3_4X) {
|
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
|
|
*bridge_agpstat |= AGPSTAT3_4X;
|
|
goto done;
|
|
|
|
} else {
|
|
|
|
/*
|
|
* If we didn't specify an AGP mode, we see if both
|
|
* the graphics card, and the bridge can do x8, and use if so.
|
|
* If not, we fall back to x4 mode.
|
|
*/
|
|
if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) {
|
|
printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode "
|
|
"supported by bridge & card (x8).\n");
|
|
*bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD);
|
|
*vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD);
|
|
} else {
|
|
printk(KERN_INFO PFX "Fell back to AGPx4 mode because ");
|
|
if (!(*bridge_agpstat & AGPSTAT3_8X)) {
|
|
printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n",
|
|
*bridge_agpstat, origbridge);
|
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
|
|
*bridge_agpstat |= AGPSTAT3_4X;
|
|
}
|
|
if (!(*vga_agpstat & AGPSTAT3_8X)) {
|
|
printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n",
|
|
*vga_agpstat, origvga);
|
|
*vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
|
|
*vga_agpstat |= AGPSTAT3_4X;
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
/* Apply any errata. */
|
|
if (agp_bridge->flags & AGP_ERRATA_FASTWRITES)
|
|
*bridge_agpstat &= ~AGPSTAT_FW;
|
|
|
|
if (agp_bridge->flags & AGP_ERRATA_SBA)
|
|
*bridge_agpstat &= ~AGPSTAT_SBA;
|
|
|
|
if (agp_bridge->flags & AGP_ERRATA_1X) {
|
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X);
|
|
*bridge_agpstat |= AGPSTAT2_1X;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* agp_collect_device_status - determine correct agp_cmd from various agp_stat's
|
|
* @bridge: an agp_bridge_data struct allocated for the AGP host bridge.
|
|
* @requested_mode: requested agp_stat from userspace (Typically from X)
|
|
* @bridge_agpstat: current agp_stat from AGP bridge.
|
|
*
|
|
* This function will hunt for an AGP graphics card, and try to match
|
|
* the requested mode to the capabilities of both the bridge and the card.
|
|
*/
|
|
u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat)
|
|
{
|
|
struct pci_dev *device = NULL;
|
|
u32 vga_agpstat;
|
|
u8 cap_ptr;
|
|
|
|
for (;;) {
|
|
device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device);
|
|
if (!device) {
|
|
printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n");
|
|
return 0;
|
|
}
|
|
cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP);
|
|
if (cap_ptr)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Ok, here we have a AGP device. Disable impossible
|
|
* settings, and adjust the readqueue to the minimum.
|
|
*/
|
|
pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat);
|
|
|
|
/* adjust RQ depth */
|
|
bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) |
|
|
min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH),
|
|
min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH))));
|
|
|
|
/* disable FW if it's not supported */
|
|
if (!((bridge_agpstat & AGPSTAT_FW) &&
|
|
(vga_agpstat & AGPSTAT_FW) &&
|
|
(requested_mode & AGPSTAT_FW)))
|
|
bridge_agpstat &= ~AGPSTAT_FW;
|
|
|
|
/* Check to see if we are operating in 3.0 mode */
|
|
if (agp_bridge->mode & AGPSTAT_MODE_3_0)
|
|
agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat);
|
|
else
|
|
agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat);
|
|
|
|
pci_dev_put(device);
|
|
return bridge_agpstat;
|
|
}
|
|
EXPORT_SYMBOL(agp_collect_device_status);
|
|
|
|
|
|
void agp_device_command(u32 bridge_agpstat, bool agp_v3)
|
|
{
|
|
struct pci_dev *device = NULL;
|
|
int mode;
|
|
|
|
mode = bridge_agpstat & 0x7;
|
|
if (agp_v3)
|
|
mode *= 4;
|
|
|
|
for_each_pci_dev(device) {
|
|
u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
|
|
if (!agp)
|
|
continue;
|
|
|
|
dev_info(&device->dev, "putting AGP V%d device into %dx mode\n",
|
|
agp_v3 ? 3 : 2, mode);
|
|
pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(agp_device_command);
|
|
|
|
|
|
void get_agp_version(struct agp_bridge_data *bridge)
|
|
{
|
|
u32 ncapid;
|
|
|
|
/* Exit early if already set by errata workarounds. */
|
|
if (bridge->major_version != 0)
|
|
return;
|
|
|
|
pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid);
|
|
bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf;
|
|
bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf;
|
|
}
|
|
EXPORT_SYMBOL(get_agp_version);
|
|
|
|
|
|
void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode)
|
|
{
|
|
u32 bridge_agpstat, temp;
|
|
|
|
get_agp_version(agp_bridge);
|
|
|
|
dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n",
|
|
agp_bridge->major_version, agp_bridge->minor_version);
|
|
|
|
pci_read_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat);
|
|
|
|
bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat);
|
|
if (bridge_agpstat == 0)
|
|
/* Something bad happened. FIXME: Return error code? */
|
|
return;
|
|
|
|
bridge_agpstat |= AGPSTAT_AGP_ENABLE;
|
|
|
|
/* Do AGP version specific frobbing. */
|
|
if (bridge->major_version >= 3) {
|
|
if (bridge->mode & AGPSTAT_MODE_3_0) {
|
|
/* If we have 3.5, we can do the isoch stuff. */
|
|
if (bridge->minor_version >= 5)
|
|
agp_3_5_enable(bridge);
|
|
agp_device_command(bridge_agpstat, true);
|
|
return;
|
|
} else {
|
|
/* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
|
|
bridge_agpstat &= ~(7<<10) ;
|
|
pci_read_config_dword(bridge->dev,
|
|
bridge->capndx+AGPCTRL, &temp);
|
|
temp |= (1<<9);
|
|
pci_write_config_dword(bridge->dev,
|
|
bridge->capndx+AGPCTRL, temp);
|
|
|
|
dev_info(&bridge->dev->dev, "bridge is in legacy mode, falling back to 2.x\n");
|
|
}
|
|
}
|
|
|
|
/* AGP v<3 */
|
|
agp_device_command(bridge_agpstat, false);
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_enable);
|
|
|
|
|
|
int agp_generic_create_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
char *table;
|
|
char *table_end;
|
|
int size;
|
|
int page_order;
|
|
int num_entries;
|
|
int i;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
/* The generic routines can't handle 2 level gatt's */
|
|
if (bridge->driver->size_type == LVL2_APER_SIZE)
|
|
return -EINVAL;
|
|
|
|
table = NULL;
|
|
i = bridge->aperture_size_idx;
|
|
temp = bridge->current_size;
|
|
size = page_order = num_entries = 0;
|
|
|
|
if (bridge->driver->size_type != FIXED_APER_SIZE) {
|
|
do {
|
|
switch (bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
size = A_SIZE_8(temp)->size;
|
|
page_order =
|
|
A_SIZE_8(temp)->page_order;
|
|
num_entries =
|
|
A_SIZE_8(temp)->num_entries;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
size = A_SIZE_16(temp)->size;
|
|
page_order = A_SIZE_16(temp)->page_order;
|
|
num_entries = A_SIZE_16(temp)->num_entries;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
size = A_SIZE_32(temp)->size;
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
break;
|
|
/* This case will never really happen. */
|
|
case FIXED_APER_SIZE:
|
|
case LVL2_APER_SIZE:
|
|
default:
|
|
size = page_order = num_entries = 0;
|
|
break;
|
|
}
|
|
|
|
table = alloc_gatt_pages(page_order);
|
|
|
|
if (table == NULL) {
|
|
i++;
|
|
switch (bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
bridge->current_size = A_IDX8(bridge);
|
|
break;
|
|
case U16_APER_SIZE:
|
|
bridge->current_size = A_IDX16(bridge);
|
|
break;
|
|
case U32_APER_SIZE:
|
|
bridge->current_size = A_IDX32(bridge);
|
|
break;
|
|
/* These cases will never really happen. */
|
|
case FIXED_APER_SIZE:
|
|
case LVL2_APER_SIZE:
|
|
default:
|
|
break;
|
|
}
|
|
temp = bridge->current_size;
|
|
} else {
|
|
bridge->aperture_size_idx = i;
|
|
}
|
|
} while (!table && (i < bridge->driver->num_aperture_sizes));
|
|
} else {
|
|
size = ((struct aper_size_info_fixed *) temp)->size;
|
|
page_order = ((struct aper_size_info_fixed *) temp)->page_order;
|
|
num_entries = ((struct aper_size_info_fixed *) temp)->num_entries;
|
|
table = alloc_gatt_pages(page_order);
|
|
}
|
|
|
|
if (table == NULL)
|
|
return -ENOMEM;
|
|
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
SetPageReserved(page);
|
|
|
|
bridge->gatt_table_real = (u32 *) table;
|
|
agp_gatt_table = (void *)table;
|
|
|
|
bridge->driver->cache_flush();
|
|
#ifdef CONFIG_X86
|
|
if (set_memory_uc((unsigned long)table, 1 << page_order))
|
|
printk(KERN_WARNING "Could not set GATT table memory to UC!\n");
|
|
|
|
bridge->gatt_table = (u32 __iomem *)table;
|
|
#else
|
|
bridge->gatt_table = ioremap_nocache(virt_to_phys(table),
|
|
(PAGE_SIZE * (1 << page_order)));
|
|
bridge->driver->cache_flush();
|
|
#endif
|
|
|
|
if (bridge->gatt_table == NULL) {
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
ClearPageReserved(page);
|
|
|
|
free_gatt_pages(table, page_order);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
bridge->gatt_bus_addr = virt_to_phys(bridge->gatt_table_real);
|
|
|
|
/* AK: bogus, should encode addresses > 4GB */
|
|
for (i = 0; i < num_entries; i++) {
|
|
writel(bridge->scratch_page, bridge->gatt_table+i);
|
|
readl(bridge->gatt_table+i); /* PCI Posting. */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_create_gatt_table);
|
|
|
|
int agp_generic_free_gatt_table(struct agp_bridge_data *bridge)
|
|
{
|
|
int page_order;
|
|
char *table, *table_end;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
temp = bridge->current_size;
|
|
|
|
switch (bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
page_order = A_SIZE_8(temp)->page_order;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
page_order = A_SIZE_16(temp)->page_order;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
break;
|
|
case FIXED_APER_SIZE:
|
|
page_order = A_SIZE_FIX(temp)->page_order;
|
|
break;
|
|
case LVL2_APER_SIZE:
|
|
/* The generic routines can't deal with 2 level gatt's */
|
|
return -EINVAL;
|
|
default:
|
|
page_order = 0;
|
|
break;
|
|
}
|
|
|
|
/* Do not worry about freeing memory, because if this is
|
|
* called, then all agp memory is deallocated and removed
|
|
* from the table. */
|
|
|
|
#ifdef CONFIG_X86
|
|
set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order);
|
|
#else
|
|
iounmap(bridge->gatt_table);
|
|
#endif
|
|
table = (char *) bridge->gatt_table_real;
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
ClearPageReserved(page);
|
|
|
|
free_gatt_pages(bridge->gatt_table_real, page_order);
|
|
|
|
agp_gatt_table = NULL;
|
|
bridge->gatt_table = NULL;
|
|
bridge->gatt_table_real = NULL;
|
|
bridge->gatt_bus_addr = 0;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_free_gatt_table);
|
|
|
|
|
|
int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type)
|
|
{
|
|
int num_entries;
|
|
size_t i;
|
|
off_t j;
|
|
void *temp;
|
|
struct agp_bridge_data *bridge;
|
|
int mask_type;
|
|
|
|
bridge = mem->bridge;
|
|
if (!bridge)
|
|
return -EINVAL;
|
|
|
|
if (mem->page_count == 0)
|
|
return 0;
|
|
|
|
temp = bridge->current_size;
|
|
|
|
switch (bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
num_entries = A_SIZE_8(temp)->num_entries;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
num_entries = A_SIZE_16(temp)->num_entries;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
break;
|
|
case FIXED_APER_SIZE:
|
|
num_entries = A_SIZE_FIX(temp)->num_entries;
|
|
break;
|
|
case LVL2_APER_SIZE:
|
|
/* The generic routines can't deal with 2 level gatt's */
|
|
return -EINVAL;
|
|
default:
|
|
num_entries = 0;
|
|
break;
|
|
}
|
|
|
|
num_entries -= agp_memory_reserved/PAGE_SIZE;
|
|
if (num_entries < 0) num_entries = 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;
|
|
}
|
|
|
|
if (((pg_start + mem->page_count) > num_entries) ||
|
|
((pg_start + mem->page_count) < pg_start))
|
|
return -EINVAL;
|
|
|
|
j = pg_start;
|
|
|
|
while (j < (pg_start + mem->page_count)) {
|
|
if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j)))
|
|
return -EBUSY;
|
|
j++;
|
|
}
|
|
|
|
if (!mem->is_flushed) {
|
|
bridge->driver->cache_flush();
|
|
mem->is_flushed = true;
|
|
}
|
|
|
|
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
|
|
writel(bridge->driver->mask_memory(bridge,
|
|
page_to_phys(mem->pages[i]),
|
|
mask_type),
|
|
bridge->gatt_table+j);
|
|
}
|
|
readl(bridge->gatt_table+j-1); /* PCI Posting. */
|
|
|
|
bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_insert_memory);
|
|
|
|
|
|
int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
|
|
{
|
|
size_t i;
|
|
struct agp_bridge_data *bridge;
|
|
int mask_type, num_entries;
|
|
|
|
bridge = mem->bridge;
|
|
if (!bridge)
|
|
return -EINVAL;
|
|
|
|
if (mem->page_count == 0)
|
|
return 0;
|
|
|
|
if (type != mem->type)
|
|
return -EINVAL;
|
|
|
|
num_entries = agp_num_entries();
|
|
if (((pg_start + mem->page_count) > num_entries) ||
|
|
((pg_start + mem->page_count) < pg_start))
|
|
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;
|
|
}
|
|
|
|
/* AK: bogus, should encode addresses > 4GB */
|
|
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
|
|
writel(bridge->scratch_page, bridge->gatt_table+i);
|
|
}
|
|
readl(bridge->gatt_table+i-1); /* PCI Posting. */
|
|
|
|
bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
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)
|
|
{
|
|
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->pages[i] = NULL;
|
|
new->page_count = 0;
|
|
new->type = type;
|
|
new->num_scratch_pages = pages;
|
|
|
|
return new;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_alloc_user);
|
|
|
|
/*
|
|
* Basic Page Allocation Routines -
|
|
* These routines handle page allocation and by default they reserve the allocated
|
|
* memory. They also handle incrementing the current_memory_agp value, Which is checked
|
|
* against a maximum value.
|
|
*/
|
|
|
|
int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *mem, size_t num_pages)
|
|
{
|
|
struct page * page;
|
|
int i, ret = -ENOMEM;
|
|
|
|
for (i = 0; i < num_pages; i++) {
|
|
page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
|
|
/* agp_free_memory() needs gart address */
|
|
if (page == NULL)
|
|
goto out;
|
|
|
|
#ifndef CONFIG_X86
|
|
map_page_into_agp(page);
|
|
#endif
|
|
get_page(page);
|
|
atomic_inc(&agp_bridge->current_memory_agp);
|
|
|
|
mem->pages[i] = page;
|
|
mem->page_count++;
|
|
}
|
|
|
|
#ifdef CONFIG_X86
|
|
set_pages_array_uc(mem->pages, num_pages);
|
|
#endif
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_alloc_pages);
|
|
|
|
struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge)
|
|
{
|
|
struct page * page;
|
|
|
|
page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
|
|
if (page == NULL)
|
|
return NULL;
|
|
|
|
map_page_into_agp(page);
|
|
|
|
get_page(page);
|
|
atomic_inc(&agp_bridge->current_memory_agp);
|
|
return page;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_alloc_page);
|
|
|
|
void agp_generic_destroy_pages(struct agp_memory *mem)
|
|
{
|
|
int i;
|
|
struct page *page;
|
|
|
|
if (!mem)
|
|
return;
|
|
|
|
#ifdef CONFIG_X86
|
|
set_pages_array_wb(mem->pages, mem->page_count);
|
|
#endif
|
|
|
|
for (i = 0; i < mem->page_count; i++) {
|
|
page = mem->pages[i];
|
|
|
|
#ifndef CONFIG_X86
|
|
unmap_page_from_agp(page);
|
|
#endif
|
|
put_page(page);
|
|
__free_page(page);
|
|
atomic_dec(&agp_bridge->current_memory_agp);
|
|
mem->pages[i] = NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_destroy_pages);
|
|
|
|
void agp_generic_destroy_page(struct page *page, int flags)
|
|
{
|
|
if (page == NULL)
|
|
return;
|
|
|
|
if (flags & AGP_PAGE_DESTROY_UNMAP)
|
|
unmap_page_from_agp(page);
|
|
|
|
if (flags & AGP_PAGE_DESTROY_FREE) {
|
|
put_page(page);
|
|
__free_page(page);
|
|
atomic_dec(&agp_bridge->current_memory_agp);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_destroy_page);
|
|
|
|
/* End Basic Page Allocation Routines */
|
|
|
|
|
|
/**
|
|
* agp_enable - initialise the agp point-to-point connection.
|
|
*
|
|
* @mode: agp mode register value to configure with.
|
|
*/
|
|
void agp_enable(struct agp_bridge_data *bridge, u32 mode)
|
|
{
|
|
if (!bridge)
|
|
return;
|
|
bridge->driver->agp_enable(bridge, mode);
|
|
}
|
|
EXPORT_SYMBOL(agp_enable);
|
|
|
|
/* When we remove the global variable agp_bridge from all drivers
|
|
* then agp_alloc_bridge and agp_generic_find_bridge need to be updated
|
|
*/
|
|
|
|
struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev)
|
|
{
|
|
if (list_empty(&agp_bridges))
|
|
return NULL;
|
|
|
|
return agp_bridge;
|
|
}
|
|
|
|
static void ipi_handler(void *null)
|
|
{
|
|
flush_agp_cache();
|
|
}
|
|
|
|
void global_cache_flush(void)
|
|
{
|
|
if (on_each_cpu(ipi_handler, NULL, 1) != 0)
|
|
panic(PFX "timed out waiting for the other CPUs!\n");
|
|
}
|
|
EXPORT_SYMBOL(global_cache_flush);
|
|
|
|
unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
|
|
dma_addr_t addr, int type)
|
|
{
|
|
/* memory type is ignored in the generic routine */
|
|
if (bridge->driver->masks)
|
|
return addr | bridge->driver->masks[0].mask;
|
|
else
|
|
return addr;
|
|
}
|
|
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
|
|
* left open.
|
|
*/
|
|
|
|
int agp3_generic_fetch_size(void)
|
|
{
|
|
u16 temp_size;
|
|
int i;
|
|
struct aper_size_info_16 *values;
|
|
|
|
pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size);
|
|
values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
|
|
|
|
for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
|
|
if (temp_size == values[i].size_value) {
|
|
agp_bridge->previous_size =
|
|
agp_bridge->current_size = (void *) (values + i);
|
|
|
|
agp_bridge->aperture_size_idx = i;
|
|
return values[i].size;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_fetch_size);
|
|
|
|
void agp3_generic_tlbflush(struct agp_memory *mem)
|
|
{
|
|
u32 ctrl;
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl);
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_tlbflush);
|
|
|
|
int agp3_generic_configure(void)
|
|
{
|
|
u32 temp;
|
|
struct aper_size_info_16 *current_size;
|
|
|
|
current_size = A_SIZE_16(agp_bridge->current_size);
|
|
|
|
agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
|
|
AGP_APERTURE_BAR);
|
|
|
|
/* set aperture size */
|
|
pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value);
|
|
/* set gart pointer */
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr);
|
|
/* enable aperture and GTLB */
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_configure);
|
|
|
|
void agp3_generic_cleanup(void)
|
|
{
|
|
u32 ctrl;
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB);
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_cleanup);
|
|
|
|
const struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] =
|
|
{
|
|
{4096, 1048576, 10,0x000},
|
|
{2048, 524288, 9, 0x800},
|
|
{1024, 262144, 8, 0xc00},
|
|
{ 512, 131072, 7, 0xe00},
|
|
{ 256, 65536, 6, 0xf00},
|
|
{ 128, 32768, 5, 0xf20},
|
|
{ 64, 16384, 4, 0xf30},
|
|
{ 32, 8192, 3, 0xf38},
|
|
{ 16, 4096, 2, 0xf3c},
|
|
{ 8, 2048, 1, 0xf3e},
|
|
{ 4, 1024, 0, 0xf3f}
|
|
};
|
|
EXPORT_SYMBOL(agp3_generic_sizes);
|
|
|