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Vector Packet Processing
pmalloc.h
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1 /*
2  * Copyright (c) 2018 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef included_palloc_h
17 #define included_palloc_h
18 #include <vppinfra/format.h>
19 #include <vppinfra/pool.h>
20 
21 #define PMALLOC_LOG2_BLOCK_SZ CLIB_LOG2_CACHE_LINE_BYTES
22 #define PMALLOC_BLOCK_SZ (1 << 6)
23 
24 #define CLIB_PMALLOC_NUMA_LOCAL 0xffffffff
25 
26 typedef struct
27 {
28  u32 start, prev, next;
29  u32 size:31;
30  u32 used:1;
32 
34 
35 typedef struct
36 {
44 
45 typedef struct
46 {
49 #define CLIB_PMALLOC_ARENA_F_SHARED_MEM (1 << 0)
50  int fd;
56  u8 *name;
59 
60 typedef struct
61 {
62  /* flags */
64 #define CLIB_PMALLOC_F_NO_PAGEMAP (1 << 0)
65 
66  /* base VA address */
67  u8 *base;
68 
69  /* default page size - typically 2M */
71 
72  /* maximum number of pages, limited by VA preallocation size */
74 
75  /* vector of pages - each page have own alloc pool and it can be split
76  into subpages (i.e. 2M page build out of 512 4K pages) */
78 
79  /* hash used to find chunk index out of VA, chunk index is defined
80  per page */
82 
83  /* alloc arenas are group of pages which share same attributes
84  shared arenas are represented by FD and they are not grovable
85  private arenas are growable */
87 
88  /* vector of per numa node alloc arena indices
89  each numa node have own default privat alloc arena */
91 
92  /* VA to PA lookup table */
94 
95  /* lookup page size - equals to smalles subpage used */
97 
98  /* last error */
101 
102 
103 int clib_pmalloc_init (clib_pmalloc_main_t * pm, uword base_addr, uword size);
105  uword size, uword align,
106  u32 numa_node);
108  uword align);
109 void clib_pmalloc_free (clib_pmalloc_main_t * pm, void *va);
110 
112  uword size, u32 log2_page_sz,
113  u32 numa_node);
114 
115 void *clib_pmalloc_alloc_from_arena (clib_pmalloc_main_t * pm, void *arena_va,
116  uword size, uword align);
117 
120 
123 {
124  return pm->error;
125 }
126 
129 {
130  uword index = (pointer_to_uword (va) - pointer_to_uword (pm->base)) >>
131  pm->def_log2_page_sz;
132 
133  ASSERT (index < vec_len (pm->pages));
134 
135  return index;
136 }
137 
140 {
142  return pm->arenas + pm->pages[index].arena_index;
143 }
144 
147 {
148  uword index = (pointer_to_uword (va) - pointer_to_uword (pm->base)) >>
150  return pointer_to_uword (va) - pm->lookup_table[index];
151 }
152 
153 
154 #endif /* included_palloc_h */
155 
156 /*
157  * fd.io coding-style-patch-verification: ON
158  *
159  * Local Variables:
160  * eval: (c-set-style "gnu")
161  * End:
162  */
u32 lookup_log2_page_sz
Definition: pmalloc.h:96
Fixed length block allocator.
format_function_t format_pmalloc_map
Definition: pmalloc.h:119
static u32 clib_pmalloc_get_page_index(clib_pmalloc_main_t *pm, void *va)
Definition: pmalloc.h:128
unsigned char u8
Definition: types.h:56
clib_pmalloc_chunk_t * chunks
Definition: pmalloc.h:39
clib_pmalloc_arena_t * arenas
Definition: pmalloc.h:86
u8 *() format_function_t(u8 *s, va_list *args)
Definition: format.h:48
format_function_t format_pmalloc
Definition: pmalloc.h:118
unsigned int u32
Definition: types.h:88
STATIC_ASSERT_SIZEOF(clib_pmalloc_chunk_t, 16)
void clib_pmalloc_free(clib_pmalloc_main_t *pm, void *va)
Definition: pmalloc.c:532
clib_mem_page_sz_t
Definition: mem.h:57
u32 size
Definition: vhost_user.h:106
#define always_inline
Definition: ipsec.h:28
int clib_pmalloc_init(clib_pmalloc_main_t *pm, uword base_addr, uword size)
Definition: pmalloc.c:64
u32 * default_arena_for_numa_node
Definition: pmalloc.h:90
static clib_error_t * clib_pmalloc_last_error(clib_pmalloc_main_t *pm)
Definition: pmalloc.h:122
uword * lookup_table
Definition: pmalloc.h:93
clib_pmalloc_page_t * pages
Definition: pmalloc.h:77
clib_error_t * error
Definition: pmalloc.h:99
void * clib_pmalloc_create_shared_arena(clib_pmalloc_main_t *pm, char *name, uword size, u32 log2_page_sz, u32 numa_node)
Definition: pmalloc.c:386
clib_mem_page_sz_t def_log2_page_sz
Definition: pmalloc.h:70
string name[64]
Definition: ip.api:44
#define ASSERT(truth)
uword * chunk_index_by_va
Definition: pmalloc.h:81
static uword pointer_to_uword(const void *p)
Definition: types.h:131
void * clib_pmalloc_alloc_aligned_on_numa(clib_pmalloc_main_t *pm, uword size, uword align, u32 numa_node)
Definition: pmalloc.c:488
static clib_pmalloc_arena_t * clib_pmalloc_get_arena(clib_pmalloc_main_t *pm, void *va)
Definition: pmalloc.h:139
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u64 uword
Definition: types.h:112
void * clib_pmalloc_alloc_aligned(clib_pmalloc_main_t *pm, uword size, uword align)
Definition: pmalloc.c:495
void * clib_pmalloc_alloc_from_arena(clib_pmalloc_main_t *pm, void *arena_va, uword size, uword align)
Definition: pmalloc.c:502
u32 index
Definition: flow_types.api:221
static uword clib_pmalloc_get_pa(clib_pmalloc_main_t *pm, void *va)
Definition: pmalloc.h:146