145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
|
|
/**************************************************************************
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "[TTM] " fmt
|
|
|
|
#include <drm/ttm/ttm_device.h>
|
|
#include <drm/ttm/ttm_tt.h>
|
|
#include <drm/ttm/ttm_resource.h>
|
|
#include <linux/agp_backend.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <asm/agp.h>
|
|
|
|
struct ttm_agp_backend {
|
|
struct ttm_tt ttm;
|
|
struct agp_memory *mem;
|
|
struct agp_bridge_data *bridge;
|
|
};
|
|
|
|
int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_resource *bo_mem)
|
|
{
|
|
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
|
|
struct page *dummy_read_page = ttm_glob.dummy_read_page;
|
|
struct agp_memory *mem;
|
|
int ret, cached = ttm->caching == ttm_cached;
|
|
unsigned i;
|
|
|
|
if (agp_be->mem)
|
|
return 0;
|
|
|
|
mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
|
|
if (unlikely(mem == NULL))
|
|
return -ENOMEM;
|
|
|
|
mem->page_count = 0;
|
|
for (i = 0; i < ttm->num_pages; i++) {
|
|
struct page *page = ttm->pages[i];
|
|
|
|
if (!page)
|
|
page = dummy_read_page;
|
|
|
|
mem->pages[mem->page_count++] = page;
|
|
}
|
|
agp_be->mem = mem;
|
|
|
|
mem->is_flushed = 1;
|
|
mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
|
|
|
|
ret = agp_bind_memory(mem, bo_mem->start);
|
|
if (ret)
|
|
pr_err("AGP Bind memory failed\n");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_bind);
|
|
|
|
void ttm_agp_unbind(struct ttm_tt *ttm)
|
|
{
|
|
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
|
|
|
|
if (agp_be->mem) {
|
|
if (agp_be->mem->is_bound) {
|
|
agp_unbind_memory(agp_be->mem);
|
|
return;
|
|
}
|
|
agp_free_memory(agp_be->mem);
|
|
agp_be->mem = NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_unbind);
|
|
|
|
bool ttm_agp_is_bound(struct ttm_tt *ttm)
|
|
{
|
|
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
|
|
|
|
if (!ttm)
|
|
return false;
|
|
|
|
return (agp_be->mem != NULL);
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_is_bound);
|
|
|
|
void ttm_agp_destroy(struct ttm_tt *ttm)
|
|
{
|
|
struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
|
|
|
|
if (agp_be->mem)
|
|
ttm_agp_unbind(ttm);
|
|
ttm_tt_fini(ttm);
|
|
kfree(agp_be);
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_destroy);
|
|
|
|
struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
|
|
struct agp_bridge_data *bridge,
|
|
uint32_t page_flags)
|
|
{
|
|
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;
|
|
|
|
if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined)) {
|
|
kfree(agp_be);
|
|
return NULL;
|
|
}
|
|
|
|
return &agp_be->ttm;
|
|
}
|
|
EXPORT_SYMBOL(ttm_agp_tt_create);
|