kolibrios-gitea/drivers/video/drm/ttm/ttm_bo.c

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/**************************************************************************
*
* 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>
*/
/* Notes:
*
* We store bo pointer in drm_mm_node struct so we know which bo own a
* specific node. There is no protection on the pointer, thus to make
* sure things don't go berserk you have to access this pointer while
* holding the global lru lock and make sure anytime you free a node you
* reset the pointer to NULL.
*/
#include "ttm/ttm_module.h"
#include "ttm/ttm_bo_driver.h"
#include "ttm/ttm_placement.h"
#include <linux/module.h>
int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
unsigned long p_size)
{
int ret = -EINVAL;
struct ttm_mem_type_manager *man;
if (type >= TTM_NUM_MEM_TYPES) {
printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type);
return ret;
}
man = &bdev->man[type];
if (man->has_type) {
printk(KERN_ERR TTM_PFX
"Memory manager already initialized for type %d\n",
type);
return ret;
}
ret = bdev->driver->init_mem_type(bdev, type, man);
if (ret)
return ret;
ret = 0;
if (type != TTM_PL_SYSTEM) {
if (!p_size) {
printk(KERN_ERR TTM_PFX
"Zero size memory manager type %d\n",
type);
return ret;
}
ret = drm_mm_init(&man->manager, 0, p_size);
if (ret)
return ret;
}
man->has_type = true;
man->use_type = true;
man->size = p_size;
INIT_LIST_HEAD(&man->lru);
return 0;
}
EXPORT_SYMBOL(ttm_bo_init_mm);
int ttm_bo_global_init(struct ttm_global_reference *ref)
{
struct ttm_bo_global_ref *bo_ref =
container_of(ref, struct ttm_bo_global_ref, ref);
struct ttm_bo_global *glob = ref->object;
int ret;
// mutex_init(&glob->device_list_mutex);
// spin_lock_init(&glob->lru_lock);
glob->mem_glob = bo_ref->mem_glob;
// glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
if (unlikely(glob->dummy_read_page == NULL)) {
ret = -ENOMEM;
goto out_no_drp;
}
INIT_LIST_HEAD(&glob->swap_lru);
INIT_LIST_HEAD(&glob->device_list);
// ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout);
ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink);
if (unlikely(ret != 0)) {
printk(KERN_ERR TTM_PFX
"Could not register buffer object swapout.\n");
goto out_no_shrink;
}
glob->ttm_bo_extra_size =
ttm_round_pot(sizeof(struct ttm_tt)) +
ttm_round_pot(sizeof(struct ttm_backend));
glob->ttm_bo_size = glob->ttm_bo_extra_size +
ttm_round_pot(sizeof(struct ttm_buffer_object));
atomic_set(&glob->bo_count, 0);
// kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type);
// ret = kobject_add(&glob->kobj, ttm_get_kobj(), "buffer_objects");
// if (unlikely(ret != 0))
// kobject_put(&glob->kobj);
return ret;
out_no_shrink:
__free_page(glob->dummy_read_page);
out_no_drp:
kfree(glob);
return ret;
}
EXPORT_SYMBOL(ttm_bo_global_init);