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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
* (C) COPYRIGHT 2019-2022 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
#ifndef _KBASE_MEM_POOL_GROUP_H_
#define _KBASE_MEM_POOL_GROUP_H_
#include <mali_kbase_defs.h>
/**
* kbase_mem_pool_group_select() - Select the memory pool to use.
*
* @kbdev: Device pointer.
* @mem_group_id: Physical memory group ID to use.
* @is_small_page: Flag used to select between the small and
* large memory pool.
*
* Return: A pointer to the selected memory pool.
*/
static inline struct kbase_mem_pool *kbase_mem_pool_group_select(
struct kbase_device *kbdev, u32 mem_group_id, bool is_small_page)
{
if (WARN_ON(unlikely(kbdev == NULL)))
return NULL;
WARN_ON(mem_group_id > BASE_MEM_GROUP_COUNT);
if (is_small_page)
return &kbdev->mem_pools.small[mem_group_id];
return &kbdev->mem_pools.large[mem_group_id];
}
/**
* kbase_mem_pool_group_config_set_max_size - Set the initial configuration for
* a set of memory pools
*
* @configs: Initial configuration for the set of memory pools
* @max_size: Maximum number of free 4 KiB pages each pool can hold
*
* This function sets the initial configuration for every memory pool so that
* the maximum amount of free memory that each pool can hold is identical.
* The equivalent number of 2 MiB pages is calculated automatically for the
* purpose of configuring the large page pools.
*/
void kbase_mem_pool_group_config_set_max_size(
struct kbase_mem_pool_group_config *configs, size_t max_size);
/**
* kbase_mem_pool_group_init - Initialize a set of memory pools
*
* @mem_pools: Set of memory pools to initialize
* @kbdev: Kbase device where memory is used
* @configs: Initial configuration for the set of memory pools
* @next_pools: Set of memory pools from which to allocate memory if there
* is no free memory in one of the @mem_pools
*
* Initializes a complete set of physical memory pools. Memory pools are used to
* allow efficient reallocation of previously-freed physical pages. A pair of
* memory pools is initialized for each physical memory group: one for 4 KiB
* pages and one for 2 MiB pages.
*
* If @next_pools is not NULL then a request to allocate memory from an
* empty pool in @mem_pools will attempt to allocate from the equivalent pool
* in @next_pools before going to the memory group manager. Similarly
* pages can spill over to the equivalent pool in @next_pools when a pool
* is full in @mem_pools. Pages are zeroed before they spill over to another
* pool, to prevent leaking information between applications.
*
* Return: 0 on success, otherwise a negative error code
*/
int kbase_mem_pool_group_init(struct kbase_mem_pool_group *mem_pools, struct kbase_device *kbdev,
const struct kbase_mem_pool_group_config *configs,
struct kbase_mem_pool_group *next_pools);
/**
* kbase_mem_pool_group_mark_dying - Mark a set of memory pools as dying
*
* @mem_pools: Set of memory pools to mark
*
* Marks a complete set of physical memory pools previously initialized by
* @kbase_mem_pool_group_init as dying. This will cause any ongoing allocation
* operations (eg growing on page fault) to be terminated.
*/
void kbase_mem_pool_group_mark_dying(struct kbase_mem_pool_group *mem_pools);
/**
* kbase_mem_pool_group_term - Terminate a set of memory pools
*
* @mem_pools: Set of memory pools to terminate
*
* Terminates a complete set of physical memory pools previously initialized by
* @kbase_mem_pool_group_init.
*/
void kbase_mem_pool_group_term(struct kbase_mem_pool_group *mem_pools);
#endif /* _KBASE_MEM_POOL_GROUP_H_ */
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