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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_palloc_h
#define included_palloc_h
#include <vppinfra/format.h>
#include <vppinfra/pool.h>
#define PMALLOC_LOG2_BLOCK_SZ CLIB_LOG2_CACHE_LINE_BYTES
#define PMALLOC_BLOCK_SZ (1 << 6)
#define CLIB_PMALLOC_NUMA_LOCAL 0xffffffff
typedef struct
{
u32 start, prev, next;
u32 size:31;
u32 used:1;
} clib_pmalloc_chunk_t;
STATIC_ASSERT_SIZEOF (clib_pmalloc_chunk_t, 16);
typedef struct
{
u32 index;
u32 arena_index;
uword pa;
clib_pmalloc_chunk_t *chunks;
u32 first_chunk_index;
u32 n_free_chunks;
u32 n_free_blocks;
} clib_pmalloc_page_t;
typedef struct
{
u32 index;
u32 flags;
#define CLIB_PMALLOC_ARENA_F_SHARED_MEM (1 << 0)
int fd;
u32 numa_node;
u32 first_page_index;
u32 log2_subpage_sz;
u32 subpages_per_page;
u32 n_pages;
u8 *name;
u32 *page_indices;
} clib_pmalloc_arena_t;
typedef struct
{
/* base VA address */
u8 *base;
/* default page size - typically 2M */
u32 def_log2_page_sz;
/* system page size - typically 4K */
u32 sys_log2_page_sz;
/* maximum number of pages, limited by VA preallocation size */
u32 max_pages;
/* vector of pages - each page have own alloc pool and it can be split
into subpages (i.e. 2M page build out of 512 4K pages) */
clib_pmalloc_page_t *pages;
/* hash used to find chunk index out of VA, chunk index is defined
per page */
uword *chunk_index_by_va;
/* alloc arenas are group of pages which share same attributes
shared arenas are represented by FD and they are not grovable
private arenas are growable */
clib_pmalloc_arena_t *arenas;
/* vector of per numa node alloc arena indices
each numa node have own default privat alloc arena */
u32 *default_arena_for_numa_node;
/* VA to PA lookup table */
uword *lookup_table;
/* lookup page size - equals to smalles subpage used */
u32 lookup_log2_page_sz;
/* last error */
clib_error_t *error;
} clib_pmalloc_main_t;
int clib_pmalloc_init (clib_pmalloc_main_t * pm, uword size);
void *clib_pmalloc_alloc_aligned_on_numa (clib_pmalloc_main_t * pm,
uword size, uword align,
u32 numa_node);
void *clib_pmalloc_alloc_aligned (clib_pmalloc_main_t * pm, uword size,
uword align);
void clib_pmalloc_free (clib_pmalloc_main_t * pm, void *va);
void *clib_pmalloc_create_shared_arena (clib_pmalloc_main_t * pm, char *name,
uword size, u32 log2_page_sz,
u32 numa_node);
void *clib_pmalloc_alloc_from_arena (clib_pmalloc_main_t * pm, void *arena_va,
uword size, uword align);
format_function_t format_pmalloc;
always_inline clib_error_t *
clib_pmalloc_last_error (clib_pmalloc_main_t * pm)
{
return pm->error;
}
always_inline u32
clib_pmalloc_get_page_index (clib_pmalloc_main_t * pm, void *va)
{
uword index = (pointer_to_uword (va) - pointer_to_uword (pm->base)) >>
pm->def_log2_page_sz;
ASSERT (index < vec_len (pm->pages));
return index;
}
always_inline clib_pmalloc_arena_t *
clib_pmalloc_get_arena (clib_pmalloc_main_t * pm, void *va)
{
u32 index = clib_pmalloc_get_page_index (pm, va);
return pm->arenas + pm->pages[index].arena_index;
}
always_inline uword
clib_pmalloc_get_pa (clib_pmalloc_main_t * pm, void *va)
{
uword index = (pointer_to_uword (va) - pointer_to_uword (pm->base)) >>
pm->lookup_log2_page_sz;
return pointer_to_uword (va) - pm->lookup_table[index];
}
#endif /* included_palloc_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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