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