2 * Copyright (c) 2015 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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
18 Permission is hereby granted, free of charge, to any person obtaining
19 a copy of this software and associated documentation files (the
20 "Software"), to deal in the Software without restriction, including
21 without limitation the rights to use, copy, modify, merge, publish,
22 distribute, sublicense, and/or sell copies of the Software, and to
23 permit persons to whom the Software is furnished to do so, subject to
24 the following conditions:
26 The above copyright notice and this permission notice shall be
27 included in all copies or substantial portions of the Software.
29 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #ifndef _included_clib_mem_h
39 #define _included_clib_mem_h
45 #include <vppinfra/clib.h> /* uword, etc */
46 #include <vppinfra/clib_error.h>
48 #include <vppinfra/dlmalloc.h>
50 #include <vppinfra/os.h>
51 #include <vppinfra/string.h> /* memcpy, clib_memset */
52 #include <vppinfra/sanitizer.h>
54 #define CLIB_MAX_MHEAPS 256
55 #define CLIB_MAX_NUMAS 8
59 CLIB_MEM_PAGE_SZ_UNKNOWN = 0,
60 CLIB_MEM_PAGE_SZ_DEFAULT = 1,
61 CLIB_MEM_PAGE_SZ_DEFAULT_HUGE = 2,
62 CLIB_MEM_PAGE_SZ_4K = 12,
63 CLIB_MEM_PAGE_SZ_16K = 14,
64 CLIB_MEM_PAGE_SZ_64K = 16,
65 CLIB_MEM_PAGE_SZ_1M = 20,
66 CLIB_MEM_PAGE_SZ_2M = 21,
67 CLIB_MEM_PAGE_SZ_16M = 24,
68 CLIB_MEM_PAGE_SZ_32M = 25,
69 CLIB_MEM_PAGE_SZ_512M = 29,
70 CLIB_MEM_PAGE_SZ_1G = 30,
71 CLIB_MEM_PAGE_SZ_16G = 34,
74 /* Unspecified NUMA socket */
75 #define VEC_NUMA_UNSPECIFIED (0xFF)
78 extern void *clib_per_cpu_mheaps[CLIB_MAX_MHEAPS];
79 extern void *clib_per_numa_mheaps[CLIB_MAX_NUMAS];
82 clib_mem_get_per_cpu_heap (void)
84 int cpu = os_get_thread_index ();
85 return clib_per_cpu_mheaps[cpu];
89 clib_mem_set_per_cpu_heap (u8 * new_heap)
91 int cpu = os_get_thread_index ();
92 void *old = clib_per_cpu_mheaps[cpu];
93 clib_per_cpu_mheaps[cpu] = new_heap;
98 clib_mem_get_per_numa_heap (u32 numa_id)
100 ASSERT (numa_id < ARRAY_LEN (clib_per_numa_mheaps));
101 return clib_per_numa_mheaps[numa_id];
105 clib_mem_set_per_numa_heap (u8 * new_heap)
107 int numa = os_get_numa_index ();
108 void *old = clib_per_numa_mheaps[numa];
109 clib_per_numa_mheaps[numa] = new_heap;
114 clib_mem_set_thread_index (void)
117 * Find an unused slot in the per-cpu-mheaps array,
118 * and grab it for this thread. We need to be able to
119 * push/pop the thread heap without affecting other thread(s).
122 if (__os_thread_index != 0)
124 for (i = 0; i < ARRAY_LEN (clib_per_cpu_mheaps); i++)
125 if (clib_atomic_bool_cmp_and_swap (&clib_per_cpu_mheaps[i],
126 0, clib_per_cpu_mheaps[0]))
128 os_set_thread_index (i);
131 ASSERT (__os_thread_index > 0);
135 clib_mem_size_nocheck (void *p)
137 return mspace_usable_size_with_delta (p);
140 /* Memory allocator which may call os_out_of_memory() if it fails */
142 clib_mem_alloc_aligned_at_offset (uword size, uword align, uword align_offset,
143 int os_out_of_memory_on_failure)
148 if (align_offset > align)
151 align_offset %= align;
153 align_offset = align;
156 cpu = os_get_thread_index ();
157 heap = clib_per_cpu_mheaps[cpu];
159 p = mspace_get_aligned (heap, size, align, align_offset);
161 if (PREDICT_FALSE (0 == p))
163 if (os_out_of_memory_on_failure)
168 CLIB_MEM_UNPOISON (p, size);
172 /* Memory allocator which calls os_out_of_memory() when it fails */
174 clib_mem_alloc (uword size)
176 return clib_mem_alloc_aligned_at_offset (size, /* align */ 1,
177 /* align_offset */ 0,
178 /* os_out_of_memory */ 1);
182 clib_mem_alloc_aligned (uword size, uword align)
184 return clib_mem_alloc_aligned_at_offset (size, align, /* align_offset */ 0,
185 /* os_out_of_memory */ 1);
188 /* Memory allocator which calls os_out_of_memory() when it fails */
190 clib_mem_alloc_or_null (uword size)
192 return clib_mem_alloc_aligned_at_offset (size, /* align */ 1,
193 /* align_offset */ 0,
194 /* os_out_of_memory */ 0);
198 clib_mem_alloc_aligned_or_null (uword size, uword align)
200 return clib_mem_alloc_aligned_at_offset (size, align, /* align_offset */ 0,
201 /* os_out_of_memory */ 0);
206 /* Memory allocator which panics when it fails.
207 Use macro so that clib_panic macro can expand __FUNCTION__ and __LINE__. */
208 #define clib_mem_alloc_aligned_no_fail(size,align) \
210 uword _clib_mem_alloc_size = (size); \
211 void * _clib_mem_alloc_p; \
212 _clib_mem_alloc_p = clib_mem_alloc_aligned (_clib_mem_alloc_size, (align)); \
213 if (! _clib_mem_alloc_p) \
214 clib_panic ("failed to allocate %d bytes", _clib_mem_alloc_size); \
218 #define clib_mem_alloc_no_fail(size) clib_mem_alloc_aligned_no_fail(size,1)
220 /* Alias to stack allocator for naming consistency. */
221 #define clib_mem_alloc_stack(bytes) __builtin_alloca(bytes)
224 clib_mem_is_heap_object (void *p)
226 void *heap = clib_mem_get_per_cpu_heap ();
228 return mspace_is_heap_object (heap, p);
232 clib_mem_free (void *p)
234 u8 *heap = clib_mem_get_per_cpu_heap ();
236 /* Make sure object is in the correct heap. */
237 ASSERT (clib_mem_is_heap_object (p));
239 CLIB_MEM_POISON (p, clib_mem_size_nocheck (p));
241 mspace_put (heap, p);
245 clib_mem_realloc (void *p, uword new_size, uword old_size)
247 /* By default use alloc, copy and free to emulate realloc. */
248 void *q = clib_mem_alloc (new_size);
252 if (old_size < new_size)
253 copy_size = old_size;
255 copy_size = new_size;
256 clib_memcpy_fast (q, p, copy_size);
263 clib_mem_size (void *p)
265 ASSERT (clib_mem_is_heap_object (p));
266 return clib_mem_size_nocheck (p);
270 clib_mem_free_s (void *p)
272 uword size = clib_mem_size (p);
273 CLIB_MEM_UNPOISON (p, size);
274 memset_s_inline (p, size, 0, size);
279 clib_mem_get_heap (void)
281 return clib_mem_get_per_cpu_heap ();
285 clib_mem_set_heap (void *heap)
287 return clib_mem_set_per_cpu_heap (heap);
290 void *clib_mem_init (void *heap, uword size);
291 void *clib_mem_init_thread_safe (void *memory, uword memory_size);
292 void *clib_mem_init_thread_safe_numa (void *memory, uword memory_size,
295 void clib_mem_exit (void);
297 uword clib_mem_get_page_size (void);
299 void clib_mem_validate (void);
301 void clib_mem_trace (int enable);
303 int clib_mem_is_traced (void);
307 /* Total number of objects allocated. */
310 /* Total allocated bytes. Bytes used and free.
311 used + free = total */
312 uword bytes_total, bytes_used, bytes_free;
314 /* Number of bytes used by mheap data structure overhead
315 (e.g. free lists, mheap header). */
316 uword bytes_overhead;
318 /* Amount of free space returned to operating system. */
319 uword bytes_free_reclaimed;
321 /* For malloc which puts small objects in sbrk region and
322 large objects in mmap'ed regions. */
323 uword bytes_used_sbrk;
324 uword bytes_used_mmap;
326 /* Max. number of bytes in this heap. */
330 void clib_mem_usage (clib_mem_usage_t * usage);
332 u8 *format_clib_mem_usage (u8 * s, va_list * args);
334 /* Allocate virtual address space. */
336 clib_mem_vm_alloc (uword size)
339 uword flags = MAP_PRIVATE;
342 flags |= MAP_ANONYMOUS;
345 mmap_addr = mmap (0, size, PROT_READ | PROT_WRITE, flags, -1, 0);
346 if (mmap_addr == (void *) -1)
349 CLIB_MEM_UNPOISON (mmap_addr, size);
355 clib_mem_vm_free (void *addr, uword size)
361 clib_mem_vm_unmap (void *addr, uword size)
364 uword flags = MAP_PRIVATE | MAP_FIXED;
366 /* To unmap we "map" with no protection. If we actually called
367 munmap then other callers could steal the address space. By
368 changing to PROT_NONE the kernel can free up the pages which is
369 really what we want "unmap" to mean. */
370 mmap_addr = mmap (addr, size, PROT_NONE, flags, -1, 0);
371 if (mmap_addr == (void *) -1)
374 CLIB_MEM_UNPOISON (mmap_addr, size);
380 clib_mem_vm_map (void *addr, uword size)
383 uword flags = MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS;
385 mmap_addr = mmap (addr, size, (PROT_READ | PROT_WRITE), flags, -1, 0);
386 if (mmap_addr == (void *) -1)
389 CLIB_MEM_UNPOISON (mmap_addr, size);
396 #define CLIB_MEM_VM_F_SHARED (1 << 0)
397 #define CLIB_MEM_VM_F_HUGETLB (1 << 1)
398 #define CLIB_MEM_VM_F_NUMA_PREFER (1 << 2)
399 #define CLIB_MEM_VM_F_NUMA_FORCE (1 << 3)
400 #define CLIB_MEM_VM_F_HUGETLB_PREALLOC (1 << 4)
401 #define CLIB_MEM_VM_F_LOCKED (1 << 5)
402 u32 flags; /**< vm allocation flags:
403 <br> CLIB_MEM_VM_F_SHARED: request shared memory, file
404 descriptor will be provided on successful allocation.
405 <br> CLIB_MEM_VM_F_HUGETLB: request hugepages.
406 <br> CLIB_MEM_VM_F_NUMA_PREFER: numa_node field contains valid
407 numa node preference.
408 <br> CLIB_MEM_VM_F_NUMA_FORCE: fail if setting numa policy fails.
409 <br> CLIB_MEM_VM_F_HUGETLB_PREALLOC: pre-allocate hugepages if
410 number of available pages is not sufficient.
411 <br> CLIB_MEM_VM_F_LOCKED: request locked memory.
413 char *name; /**< Name for memory allocation, set by caller. */
414 uword size; /**< Allocation size, set by caller. */
415 int numa_node; /**< numa node preference. Valid if CLIB_MEM_VM_F_NUMA_PREFER set. */
416 void *addr; /**< Pointer to allocated memory, set on successful allocation. */
417 int fd; /**< File descriptor, set on successful allocation if CLIB_MEM_VM_F_SHARED is set. */
418 int log2_page_size; /* Page size in log2 format, set on successful allocation. */
419 int n_pages; /* Number of pages. */
420 uword requested_va; /**< Request fixed position mapping */
421 } clib_mem_vm_alloc_t;
423 clib_error_t *clib_mem_create_fd (char *name, int *fdp);
424 clib_error_t *clib_mem_create_hugetlb_fd (char *name, int *fdp);
425 clib_error_t *clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a);
426 void clib_mem_vm_ext_free (clib_mem_vm_alloc_t * a);
427 u64 clib_mem_get_fd_page_size (int fd);
428 uword clib_mem_get_default_hugepage_size (void);
429 int clib_mem_get_fd_log2_page_size (int fd);
430 uword clib_mem_vm_reserve (uword start, uword size,
431 clib_mem_page_sz_t log2_page_sz);
432 u64 *clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages);
433 void clib_mem_destroy_mspace (void *mspace);
434 void clib_mem_destroy (void);
438 uword size; /**< Map size */
439 int fd; /**< File descriptor to be mapped */
440 uword requested_va; /**< Request fixed position mapping */
441 void *addr; /**< Pointer to mapped memory, if successful */
445 clib_error_t *clib_mem_vm_ext_map (clib_mem_vm_map_t * a);
446 void clib_mem_vm_randomize_va (uword * requested_va,
447 clib_mem_page_sz_t log2_page_size);
448 void mheap_trace (void *v, int enable);
449 uword clib_mem_trace_enable_disable (uword enable);
450 void clib_mem_trace (int enable);
452 #include <vppinfra/error.h> /* clib_panic */
454 #endif /* _included_clib_mem_h */
457 * fd.io coding-style-patch-verification: ON
460 * eval: (c-set-style "gnu")