1 /* SPDX-License-Identifier: Apache-2.0
2 * Copyright(c) 2021 Cisco Systems, Inc.
3 * Copyright(c) 2024 Tom Jones <thj@freebsd.org>
11 #include <sys/memrange.h>
12 #include <sys/mount.h>
15 #include <vppinfra/clib.h>
16 #include <vppinfra/mem.h>
17 #include <vppinfra/lock.h>
18 #include <vppinfra/time.h>
19 #include <vppinfra/bitmap.h>
20 #include <vppinfra/format.h>
21 #include <vppinfra/clib_error.h>
23 #ifndef F_FBSD_SPECIFIC_BASE
24 #define F_FBSD_SPECIFIC_BASE 1024
28 #define F_ADD_SEALS (F_FBSD_SPECIFIC_BASE + 9)
29 #define F_GET_SEALS (F_FBSD_SPECIFIC_BASE + 10)
31 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
32 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
33 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
34 #define F_SEAL_WRITE 0x0008 /* prevent writes */
38 #define MFD_HUGETLB 0x0004U
41 #ifndef MAP_HUGE_SHIFT
42 #define MAP_HUGE_SHIFT 26
45 #ifndef MFD_HUGE_SHIFT
46 #define MFD_HUGE_SHIFT 26
49 #ifndef MAP_FIXED_NOREPLACE
50 #define MAP_FIXED_NOREPLACE MAP_FIXED
56 while (clib_atomic_test_and_set (&clib_mem_main.map_lock))
63 clib_atomic_release (&clib_mem_main.map_lock);
67 clib_mem_main_init (void)
69 clib_mem_main_t *mm = &clib_mem_main;
70 long sysconf_page_size;
74 if (mm->log2_page_sz != CLIB_MEM_PAGE_SZ_UNKNOWN)
77 /* system page size */
78 sysconf_page_size = sysconf (_SC_PAGESIZE);
79 if (sysconf_page_size < 0)
81 clib_panic ("Could not determine the page size");
83 page_size = sysconf_page_size;
84 mm->log2_page_sz = min_log2 (page_size);
86 mm->log2_default_hugepage_sz = min_log2 (page_size);
87 mm->log2_sys_default_hugepage_sz = mm->log2_default_hugepage_sz;
90 va = mmap (0, page_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
95 if (mlock (va, page_size))
99 * TODO: In linux/mem.c we can move pages to numa domains, this isn't an
100 * option in FreeBSD yet.
104 munmap (va, page_size);
108 clib_mem_get_fd_page_size (int fd)
110 struct stat st = { 0 };
111 if (fstat (fd, &st) == -1)
113 return st.st_blksize;
116 __clib_export clib_mem_page_sz_t
117 clib_mem_get_fd_log2_page_size (int fd)
119 uword page_size = clib_mem_get_fd_page_size (fd);
120 return page_size ? min_log2 (page_size) : CLIB_MEM_PAGE_SZ_UNKNOWN;
124 clib_mem_vm_randomize_va (uword *requested_va,
125 clib_mem_page_sz_t log2_page_size)
127 /* TODO: Not yet implemented */
131 clib_mem_vm_create_fd (clib_mem_page_sz_t log2_page_size, char *fmt, ...)
133 clib_mem_main_t *mm = &clib_mem_main;
135 unsigned int memfd_flags;
139 if (log2_page_size == mm->log2_page_sz)
140 log2_page_size = CLIB_MEM_PAGE_SZ_DEFAULT;
141 else if (log2_page_size == mm->log2_sys_default_hugepage_sz)
142 log2_page_size = CLIB_MEM_PAGE_SZ_DEFAULT_HUGE;
144 switch (log2_page_size)
146 case CLIB_MEM_PAGE_SZ_UNKNOWN:
147 return CLIB_MEM_ERROR;
148 case CLIB_MEM_PAGE_SZ_DEFAULT:
149 memfd_flags = MFD_ALLOW_SEALING;
151 case CLIB_MEM_PAGE_SZ_DEFAULT_HUGE:
152 memfd_flags = MFD_HUGETLB;
155 memfd_flags = MFD_HUGETLB | log2_page_size << MFD_HUGE_SHIFT;
159 s = va_format (0, fmt, &va);
162 /* memfd_create maximum string size is 249 chars without trailing zero */
163 if (vec_len (s) > 249)
164 vec_set_len (s, 249);
167 fd = memfd_create ((char *) s, memfd_flags);
170 vec_reset_length (mm->error);
171 mm->error = clib_error_return_unix (mm->error, "memfd_create");
173 return CLIB_MEM_ERROR;
178 if ((memfd_flags & MFD_ALLOW_SEALING) &&
179 ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1))
181 vec_reset_length (mm->error);
182 mm->error = clib_error_return_unix (mm->error, "fcntl (F_ADD_SEALS)");
184 return CLIB_MEM_ERROR;
191 clib_mem_vm_reserve (uword start, uword size, clib_mem_page_sz_t log2_page_sz)
193 clib_mem_main_t *mm = &clib_mem_main;
194 uword pagesize = 1ULL << log2_page_sz;
195 uword sys_page_sz = 1ULL << mm->log2_page_sz;
199 size = round_pow2 (size, pagesize);
201 /* in adition of requested reservation, we also rserve one system page
202 * (typically 4K) adjacent to the start off reservation */
206 /* start address is provided, so we just need to make sure we are not
207 * replacing existing map */
208 if (start & pow2_mask (log2_page_sz))
210 base = (void *) start - sys_page_sz;
211 base = mmap (base, size + sys_page_sz, PROT_NONE,
212 MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE, -1, 0);
214 return (base == MAP_FAILED) ? ~0 : start;
217 /* to make sure that we get reservation aligned to page_size we need to
218 * request one additional page as mmap will return us address which is
219 * aligned only to system page size */
221 mmap (0, size + pagesize, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
223 if (base == MAP_FAILED)
226 /* return additional space at the end of allocation */
227 p = base + size + pagesize;
228 n_bytes = (uword) p & pow2_mask (log2_page_sz);
235 /* return additional space at the start of allocation */
236 n_bytes = pagesize - sys_page_sz - n_bytes;
239 munmap (base, n_bytes);
243 return (uword) base + sys_page_sz;
246 __clib_export clib_mem_vm_map_hdr_t *
247 clib_mem_vm_get_next_map_hdr (clib_mem_vm_map_hdr_t *hdr)
249 /* TODO: Not yet implemented */
254 clib_mem_vm_map_internal (void *base, clib_mem_page_sz_t log2_page_sz,
255 uword size, int fd, uword offset, char *name)
257 clib_mem_main_t *mm = &clib_mem_main;
258 clib_mem_vm_map_hdr_t *hdr;
259 uword sys_page_sz = 1ULL << mm->log2_page_sz;
260 int mmap_flags = MAP_FIXED, is_huge = 0;
264 mmap_flags |= MAP_SHARED;
265 log2_page_sz = clib_mem_get_fd_log2_page_size (fd);
266 if (log2_page_sz > mm->log2_page_sz)
271 mmap_flags |= MAP_PRIVATE | MAP_ANONYMOUS;
273 if (log2_page_sz == mm->log2_page_sz)
274 log2_page_sz = CLIB_MEM_PAGE_SZ_DEFAULT;
276 switch (log2_page_sz)
278 case CLIB_MEM_PAGE_SZ_UNKNOWN:
279 /* will fail later */
281 case CLIB_MEM_PAGE_SZ_DEFAULT:
282 log2_page_sz = mm->log2_page_sz;
284 case CLIB_MEM_PAGE_SZ_DEFAULT_HUGE:
285 /* We shouldn't be selecting HUGETLB on FreeBSD */
286 log2_page_sz = CLIB_MEM_PAGE_SZ_UNKNOWN;
289 log2_page_sz = mm->log2_page_sz;
294 size = round_pow2 (size, 1ULL << log2_page_sz);
296 base = (void *) clib_mem_vm_reserve ((uword) base, size, log2_page_sz);
298 if (base == (void *) ~0)
299 return CLIB_MEM_VM_MAP_FAILED;
301 base = mmap (base, size, PROT_READ | PROT_WRITE, mmap_flags, fd, offset);
303 if (base == MAP_FAILED)
304 return CLIB_MEM_VM_MAP_FAILED;
306 if (is_huge && (mlock (base, size) != 0))
309 return CLIB_MEM_VM_MAP_FAILED;
312 hdr = mmap (base - sys_page_sz, sys_page_sz, PROT_READ | PROT_WRITE,
313 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
315 if (hdr != base - sys_page_sz)
318 return CLIB_MEM_VM_MAP_FAILED;
325 mprotect (mm->last_map, sys_page_sz, PROT_READ | PROT_WRITE);
326 mm->last_map->next = hdr;
327 mprotect (mm->last_map, sys_page_sz, PROT_NONE);
332 clib_mem_unpoison (hdr, sys_page_sz);
334 hdr->prev = mm->last_map;
335 snprintf (hdr->name, CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1, "%s", (char *) name);
338 hdr->base_addr = (uword) base;
339 hdr->log2_page_sz = log2_page_sz;
340 hdr->num_pages = size >> log2_page_sz;
342 hdr->name[CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1] = 0;
343 mprotect (hdr, sys_page_sz, PROT_NONE);
347 clib_mem_unpoison (base, size);
352 clib_mem_vm_unmap (void *base)
354 clib_mem_main_t *mm = &clib_mem_main;
355 uword size, sys_page_sz = 1ULL << mm->log2_page_sz;
356 clib_mem_vm_map_hdr_t *hdr = base - sys_page_sz;
360 if (mprotect (hdr, sys_page_sz, PROT_READ | PROT_WRITE) != 0)
363 size = hdr->num_pages << hdr->log2_page_sz;
364 if (munmap ((void *) hdr->base_addr, size) != 0)
369 mprotect (hdr->next, sys_page_sz, PROT_READ | PROT_WRITE);
370 hdr->next->prev = hdr->prev;
371 mprotect (hdr->next, sys_page_sz, PROT_NONE);
374 mm->last_map = hdr->prev;
378 mprotect (hdr->prev, sys_page_sz, PROT_READ | PROT_WRITE);
379 hdr->prev->next = hdr->next;
380 mprotect (hdr->prev, sys_page_sz, PROT_NONE);
383 mm->first_map = hdr->next;
387 if (munmap (hdr, sys_page_sz) != 0)
388 return CLIB_MEM_ERROR;
393 return CLIB_MEM_ERROR;
397 clib_mem_get_page_stats (void *start, clib_mem_page_sz_t log2_page_size,
398 uword n_pages, clib_mem_page_stats_t *stats)
403 log2_page_size = clib_mem_log2_page_size_validate (log2_page_size);
405 vec_validate (status, n_pages - 1);
406 vec_validate (ptr, n_pages - 1);
408 for (i = 0; i < n_pages; i++)
409 ptr[i] = start + (i << log2_page_size);
411 clib_memset (stats, 0, sizeof (clib_mem_page_stats_t));
412 stats->total = n_pages;
413 stats->log2_page_sz = log2_page_size;
416 * TODO: Until FreeBSD has support for tracking pages in NUMA domains just
417 * return that all are unknown for the statsistics.
419 stats->unknown = n_pages;
426 clib_mem_vm_get_paddr (void *mem, clib_mem_page_sz_t log2_page_size,
429 struct mem_extract meme;
430 int pagesize = sysconf (_SC_PAGESIZE);
435 log2_page_size = clib_mem_log2_page_size_validate (log2_page_size);
437 if ((fd = open ((char *) "/dev/mem", O_RDONLY)) == -1)
440 for (i = 0; i < n_pages; i++)
442 meme.me_vaddr = pointer_to_uword (mem) + (((u64) i) << log2_page_size);
444 if (ioctl (fd, MEM_EXTRACT_PADDR, &meme) == -1)
446 vec_add1 (r, meme.me_paddr * pagesize);
451 if (vec_len (r) != n_pages)
460 clib_mem_set_numa_affinity (u8 numa_node, int force)
462 /* TODO: Not yet implemented */
463 return CLIB_MEM_ERROR;
467 clib_mem_set_default_numa_affinity ()
469 /* TODO: Not yet implemented */