/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Bismarck., ND., 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 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*
**************************************************************************/
/*
* Simple memory manager interface that keeps track on allocate regions on a
* per "owner" basis. All regions associated with an "owner" can be released
* with a simple call. Typically if the "owner" exists. The owner is any
* "unsigned long" identifier. Can typically be a pointer to a file private
* struct or a context identifier.
*
* Authors:
* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "drm_sman.h"
struct drm_owner_item {
struct drm_hash_item owner_hash;
struct list_head sman_list;
struct list_head mem_blocks;
};
void drm_sman_takedown(struct drm_sman * sman)
{
drm_ht_remove(&sman->user_hash_tab);
drm_ht_remove(&sman->owner_hash_tab);
kfree(sman->mm);
}
EXPORT_SYMBOL(drm_sman_takedown);
int
drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
unsigned int user_order, unsigned int owner_order)
{
int ret = 0;
sman->mm = (struct drm_sman_mm *) kcalloc(num_managers,
sizeof(*sman->mm),
GFP_KERNEL);
if (!sman->mm) {
ret = -ENOMEM;
goto out;
}
sman->num_managers = num_managers;
INIT_LIST_HEAD(&sman->owner_items);
ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
if (ret)
goto out1;
ret = drm_ht_create(&sman->user_hash_tab, user_order);
if (!ret)
goto out;
drm_ht_remove(&sman->owner_hash_tab);
out1:
kfree(sman->mm);
out:
return ret;
}
EXPORT_SYMBOL(drm_sman_init);
static void *drm_sman_mm_allocate(void *private, unsigned long size,
unsigned alignment)
{
struct drm_mm *mm = (struct drm_mm *) private;
struct drm_mm_node *tmp;
tmp = drm_mm_search_free(mm, size, alignment, 1);
if (!tmp) {
return NULL;
}
tmp = drm_mm_get_block(tmp, size, alignment);
return tmp;
}
static void drm_sman_mm_free(void *private, void *ref)
{
struct drm_mm_node *node = (struct drm_mm_node *) ref;
drm_mm_put_block(node);
}
static void drm_sman_mm_destroy(void *private)
{
struct drm_mm *mm = (struct drm_mm *) private;
drm_mm_takedown(mm);
kfree(mm);
}
static unsigned long drm_sman_mm_offset(void *private, void *ref)
{
struct drm_mm_node *node = (struct drm_mm_node *) ref;
return node->start;
}
int
drm_sman_set_range(struct drm_sman * sman, unsigned int manager,
unsigned long start, unsigned long size)
{
struct drm_sman_mm *sman_mm;
struct drm_mm *mm;
int ret;
BUG_ON(manager >= sman->num_managers);
sman_mm = &sman->mm[manager];
mm = kzalloc(sizeof(*mm), GFP_KERNEL);
if (!mm) {
return -ENOMEM;
}
sman_mm->private = mm;
ret = drm_mm_init(mm, start, size);
if (ret) {
kfree(mm);
return ret;
}
sman_mm->allocate = drm_sman_mm_allocate;
sman_mm->free = drm_sman_mm_free;
sman_mm->destroy = drm_sman_mm_destroy;
sman_mm->offset = drm_sman_mm_offset;
return 0;
}
EXPORT_SYMBOL(drm_sman_set_range);
int
drm_sman_set_manager(struct drm_sman * sman, unsigned int manager,
struct drm_sman_mm * allocator)
{
BUG_ON(manager >= sman->num_managers);
sman->mm[manager] = *allocator;
return 0;
}
EXPORT_SYMBOL(drm_sman_set_manager);
static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
unsigned long owner)
{
int ret;
struct drm_hash_item *owner_hash_item;
struct drm_owner_item *owner_item;
ret = drm_ht_find_item(&sman->owner_hash_tab, owner, &owner_hash_item);
if (!ret) {
return drm_hash_entry(owner_hash_item, struct drm_owner_item,
owner_hash);
}
owner_item = kzalloc(sizeof(*owner_item), GFP_KERNEL);
if (!owner_item)
goto out;
INIT_LIST_HEAD(&owner_item->mem_blocks);
owner_item->owner_hash.key = owner;
if (drm_ht_insert_item(&sman->owner_hash_tab, &owner_item->owner_hash))
goto out1;
list_add_tail(&owner_item->sman_list, &sman->owner_items);
return owner_item;
out1:
kfree(owner_item);
out:
return NULL;
}
struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int manager,
unsigned long size, unsigned alignment,
unsigned long owner)
{
void *tmp;
struct drm_sman_mm *sman_mm;
struct drm_owner_item *owner_item;
struct drm_memblock_item *memblock;
BUG_ON(manager >= sman->num_managers);
sman_mm = &sman->mm[manager];
tmp = sman_mm->allocate(sman_mm->private, size, alignment);
if (!tmp) {
return NULL;
}
memblock = kzalloc(sizeof(*memblock), GFP_KERNEL);
if (!memblock)
goto out;
memblock->mm_info = tmp;
memblock->mm = sman_mm;
memblock->sman = sman;
if (drm_ht_just_insert_please
(&sman->user_hash_tab, &memblock->user_hash,
(unsigned long)memblock, 32, 0, 0))
goto out1;
owner_item = drm_sman_get_owner_item(sman, owner);
if (!owner_item)
goto out2;
list_add_tail(&memblock->owner_list, &owner_item->mem_blocks);
return memblock;
out2:
drm_ht_remove_item(&sman->user_hash_tab, &memblock->user_hash);
out1:
kfree(memblock);
out:
sman_mm->free(sman_mm->private, tmp);
return NULL;
}
EXPORT_SYMBOL(drm_sman_alloc);
static void drm_sman_free(struct drm_memblock_item *item)
{
struct drm_sman *sman = item->sman;
list_del(&item->owner_list);
drm_ht_remove_item(&sman->user_hash_tab, &item->user_hash);
item->mm->free(item->mm->private, item->mm_info);
kfree(item);
}
int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
{
struct drm_hash_item *hash_item;
struct drm_memblock_item *memblock_item;
if (drm_ht_find_item(&sman->user_hash_tab, key, &hash_item))
return -EINVAL;
memblock_item = drm_hash_entry(hash_item, struct drm_memblock_item,
user_hash);
drm_sman_free(memblock_item);
return 0;
}
EXPORT_SYMBOL(drm_sman_free_key);
static void drm_sman_remove_owner(struct drm_sman *sman,
struct drm_owner_item *owner_item)
{
list_del(&owner_item->sman_list);
drm_ht_remove_item(&sman->owner_hash_tab, &owner_item->owner_hash);
kfree(owner_item);
}
int drm_sman_owner_clean(struct drm_sman *sman, unsigned long owner)
{
struct drm_hash_item *hash_item;
struct drm_owner_item *owner_item;
if (drm_ht_find_item(&sman->owner_hash_tab, owner, &hash_item)) {
return -1;
}
owner_item = drm_hash_entry(hash_item, struct drm_owner_item, owner_hash);
if (owner_item->mem_blocks.next == &owner_item->mem_blocks) {
drm_sman_remove_owner(sman, owner_item);
return -1;
}
return 0;
}
EXPORT_SYMBOL(drm_sman_owner_clean);
static void drm_sman_do_owner_cleanup(struct drm_sman *sman,
struct drm_owner_item *owner_item)
{
struct drm_memblock_item *entry, *next;
list_for_each_entry_safe(entry, next, &owner_item->mem_blocks,
owner_list) {
drm_sman_free(entry);
}
drm_sman_remove_owner(sman, owner_item);
}
void drm_sman_owner_cleanup(struct drm_sman *sman, unsigned long owner)
{
struct drm_hash_item *hash_item;
struct drm_owner_item *owner_item;
if (drm_ht_find_item(&sman->owner_hash_tab, owner, &hash_item)) {
return;
}
owner_item = drm_hash_entry(hash_item, struct drm_owner_item, owner_hash);
drm_sman_do_owner_cleanup(sman, owner_item);
}
EXPORT_SYMBOL(drm_sman_owner_cleanup);
void drm_sman_cleanup(struct drm_sman *sman)
{
struct drm_owner_item *entry, *next;
unsigned int i;
struct drm_sman_mm *sman_mm;
list_for_each_entry_safe(entry, next, &sman->owner_items, sman_list) {
drm_sman_do_owner_cleanup(sman, entry);
}
if (sman->mm) {
for (i = 0; i < sman->num_managers; ++i) {
sman_mm = &sman->mm[i];
if (sman_mm->private) {
sman_mm->destroy(sman_mm->private);
sman_mm->private = NULL;
}
}
}
}
EXPORT_SYMBOL(drm_sman_cleanup);
