mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 19:41:54 +00:00
07613ba2f4
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>
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
**************************************************************************/
|
|
/*
|
|
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
|
|
* Keith Packard.
|
|
*/
|
|
|
|
#include "ttm/ttm_module.h"
|
|
#include "ttm/ttm_bo_driver.h"
|
|
#ifdef TTM_HAS_AGP
|
|
#include "ttm/ttm_placement.h"
|
|
#include <linux/agp_backend.h>
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <asm/agp.h>
|
|
|
|
struct ttm_agp_backend {
|
|
struct ttm_backend backend;
|
|
struct agp_memory *mem;
|
|
struct agp_bridge_data *bridge;
|
|
};
|
|
|
|
static int ttm_agp_populate(struct ttm_backend *backend,
|
|
unsigned long num_pages, struct page **pages,
|
|
struct page *dummy_read_page)
|
|
{
|
|
struct ttm_agp_backend *agp_be =
|
|
container_of(backend, struct ttm_agp_backend, backend);
|
|
struct page **cur_page, **last_page = pages + num_pages;
|
|
struct agp_memory *mem;
|
|
|
|
mem = agp_allocate_memory(agp_be->bridge, num_pages, AGP_USER_MEMORY);
|
|
if (unlikely(mem == NULL))
|
|
return -ENOMEM;
|
|
|
|
mem->page_count = 0;
|
|
for (cur_page = pages; cur_page < last_page; ++cur_page) {
|
|
struct page *page = *cur_page;
|
|
if (!page)
|
|
page = dummy_read_page;
|
|
|
|
mem->pages[mem->page_count++] = page;
|
|
}
|
|
agp_be->mem = mem;
|
|
return 0;
|
|
}
|
|
|
|
static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
|
|
{
|
|
struct ttm_agp_backend *agp_be =
|
|
container_of(backend, struct ttm_agp_backend, backend);
|
|
struct agp_memory *mem = agp_be->mem;
|
|
int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
|
|
int ret;
|
|
|
|
mem->is_flushed = 1;
|
|
mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
|
|
|
|
ret = agp_bind_memory(mem, bo_mem->mm_node->start);
|
|
if (ret)
|
|
printk(KERN_ERR TTM_PFX "AGP Bind memory failed.\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ttm_agp_unbind(struct ttm_backend *backend)
|
|
{
|
|
struct ttm_agp_backend *agp_be =
|
|
container_of(backend, struct ttm_agp_backend, backend);
|
|
|
|
if (agp_be->mem->is_bound)
|
|
return agp_unbind_memory(agp_be->mem);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static void ttm_agp_clear(struct ttm_backend *backend)
|
|
{
|
|
struct ttm_agp_backend *agp_be =
|
|
container_of(backend, struct ttm_agp_backend, backend);
|
|
struct agp_memory *mem = agp_be->mem;
|
|
|
|
if (mem) {
|
|
ttm_agp_unbind(backend);
|
|
agp_free_memory(mem);
|
|
}
|
|
agp_be->mem = NULL;
|
|
}
|
|
|
|
static void ttm_agp_destroy(struct ttm_backend *backend)
|
|
{
|
|
struct ttm_agp_backend *agp_be =
|
|
container_of(backend, struct ttm_agp_backend, backend);
|
|
|
|
if (agp_be->mem)
|
|
ttm_agp_clear(backend);
|
|
kfree(agp_be);
|
|
}
|
|
|
|
static struct ttm_backend_func ttm_agp_func = {
|
|
.populate = ttm_agp_populate,
|
|
.clear = ttm_agp_clear,
|
|
.bind = ttm_agp_bind,
|
|
.unbind = ttm_agp_unbind,
|
|
.destroy = ttm_agp_destroy,
|
|
};
|
|
|
|
struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
|
|
struct agp_bridge_data *bridge)
|
|
{
|
|
struct ttm_agp_backend *agp_be;
|
|
|
|
agp_be = kmalloc(sizeof(*agp_be), GFP_KERNEL);
|
|
if (!agp_be)
|
|
return NULL;
|
|
|
|
agp_be->mem = NULL;
|
|
agp_be->bridge = bridge;
|
|
agp_be->backend.func = &ttm_agp_func;
|
|
agp_be->backend.bdev = bdev;
|
|
return &agp_be->backend;
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_backend_init);
|
|
|
|
#endif
|