af86364409
Before this commit system call memalign was used for aligned
allocations, however memalign is deprecated.
Based on (1) - POSIX requires that memory aligned allocations can be
freed using free. Some systems provide no way to reclaim memory
allocated with memalign (because one can only pass to free a pointer
gotten from malloc, while, memalign would call malloc and then align the
obtained value).
Another issue is that 64/32 bits architectures use a minimal alignment
size. So any requested alignment below the minimal system size can be
simplified by calling malloc.
The glibc implementation allows memory obtained from posix_memalign to
be reclaimed with free. This commit replaces system call memalign with
system call posix_memalign. It also calls malloc in case the requested
alignment is below the minimal system size.
(1) https://linux.die.net/man/3/memalign
Fixes: d38e3d5266 ("common/mlx5: add memory management functions")
Cc: stable@dpdk.org
Signed-off-by: Ophir Munk <ophirmu@nvidia.com>
Acked-by: Matan Azrad <matan@mellanox.com>
108 lines
2.2 KiB
C
108 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2020 Mellanox Technologies, Ltd
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*/
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#ifndef MLX5_MALLOC_H_
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#define MLX5_MALLOC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MLX5_MALLOC_ALIGNMENT
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#ifndef RTE_ARCH_64
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#define MLX5_MALLOC_ALIGNMENT 8
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#else
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#define MLX5_MALLOC_ALIGNMENT 16
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#endif
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#endif
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enum mlx5_mem_flags {
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MLX5_MEM_ANY = 0,
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/* Memory will be allocated dpends on sys_mem_en. */
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MLX5_MEM_SYS = 1 << 0,
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/* Memory should be allocated from system. */
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MLX5_MEM_RTE = 1 << 1,
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/* Memory should be allocated from rte hugepage. */
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MLX5_MEM_ZERO = 1 << 2,
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/* Memory should be cleared to zero. */
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};
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/**
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* Select the PMD memory allocate preference.
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*
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* Once sys_mem_en is set, the default memory allocate will from
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* system only if an explicitly flag is set to order the memory
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* from rte hugepage memory.
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*
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* @param sys_mem_en
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* Use system memory or not.
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*/
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__rte_internal
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void mlx5_malloc_mem_select(uint32_t sys_mem_en);
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/**
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* Dump the PMD memory usage statistic.
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*/
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__rte_internal
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void mlx5_memory_stat_dump(void);
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/**
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* Memory allocate function.
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*
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* @param flags
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* The bits as enum mlx5_mem_flags defined.
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* @param size
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* Memory size to be allocated.
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* @param align
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* Memory alignment.
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* @param socket
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* The socket memory should allocated.
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* Valid only when allocate the memory from rte hugepage.
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*
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* @return
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* Pointer of the allocated memory, NULL otherwise.
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*/
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__rte_internal
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void *mlx5_malloc(uint32_t flags, size_t size, unsigned int align, int socket);
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/**
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* Memory reallocate function.
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*
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*
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*
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* @param addr
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* The memory to be reallocated.
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* @param flags
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* The bits as enum mlx5_mem_flags defined.
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* @param size
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* Memory size to be allocated.
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* @param align
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* Memory alignment.
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* @param socket
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* The socket memory should allocated.
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* Valid only when allocate the memory from rte hugepage.
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*
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* @return
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* Pointer of the allocated memory, NULL otherwise.
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*/
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__rte_internal
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void *mlx5_realloc(void *addr, uint32_t flags, size_t size, unsigned int align,
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int socket);
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/**
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* Memory free function.
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*
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* @param addr
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* The memory address to be freed..
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*/
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__rte_internal
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void mlx5_free(void *addr);
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#ifdef __cplusplus
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}
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#endif
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#endif
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