1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
7 #include <sys/sysctl.h>
14 #include <rte_eal_memconfig.h>
15 #include <rte_errno.h>
17 #include <rte_string_fns.h>
18 #include "eal_private.h"
19 #include "eal_internal_cfg.h"
20 #include "eal_filesystem.h"
22 #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
25 * Get physical address of any mapped virtual address in the current process.
28 rte_mem_virt2phy(const void *virtaddr)
30 /* XXX not implemented. This function is only used by
31 * rte_mempool_virt2iova() when hugepages are disabled. */
36 rte_mem_virt2iova(const void *virtaddr)
38 return rte_mem_virt2phy(virtaddr);
42 rte_eal_hugepage_init(void)
44 struct rte_mem_config *mcfg;
45 uint64_t total_mem = 0;
47 unsigned int i, j, seg_idx = 0;
49 /* get pointer to global configuration */
50 mcfg = rte_eal_get_configuration()->mem_config;
52 /* for debug purposes, hugetlbfs can be disabled */
53 if (internal_config.no_hugetlbfs) {
54 struct rte_memseg_list *msl;
55 struct rte_fbarray *arr;
56 struct rte_memseg *ms;
60 /* create a memseg list */
61 msl = &mcfg->memsegs[0];
63 page_sz = RTE_PGSIZE_4K;
64 n_segs = internal_config.memory / page_sz;
66 if (rte_fbarray_init(&msl->memseg_arr, "nohugemem", n_segs,
67 sizeof(struct rte_memseg))) {
68 RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
72 addr = mmap(NULL, internal_config.memory,
73 PROT_READ | PROT_WRITE,
74 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
75 if (addr == MAP_FAILED) {
76 RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
81 msl->page_sz = page_sz;
84 /* populate memsegs. each memseg is 1 page long */
85 for (cur_seg = 0; cur_seg < n_segs; cur_seg++) {
86 arr = &msl->memseg_arr;
88 ms = rte_fbarray_get(arr, cur_seg);
89 if (rte_eal_iova_mode() == RTE_IOVA_VA)
90 ms->iova = (uintptr_t)addr;
92 ms->iova = RTE_BAD_IOVA;
94 ms->hugepage_sz = page_sz;
98 rte_fbarray_set_used(arr, cur_seg);
100 addr = RTE_PTR_ADD(addr, page_sz);
105 /* map all hugepages and sort them */
106 for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
107 struct hugepage_info *hpi;
108 rte_iova_t prev_end = 0;
109 int prev_ms_idx = -1;
110 uint64_t page_sz, mem_needed;
111 unsigned int n_pages, max_pages;
113 hpi = &internal_config.hugepage_info[i];
114 page_sz = hpi->hugepage_sz;
115 max_pages = hpi->num_pages[0];
116 mem_needed = RTE_ALIGN_CEIL(internal_config.memory - total_mem,
119 n_pages = RTE_MIN(mem_needed / page_sz, max_pages);
121 for (j = 0; j < n_pages; j++) {
122 struct rte_memseg_list *msl;
123 struct rte_fbarray *arr;
124 struct rte_memseg *seg;
128 size_t sysctl_size = sizeof(physaddr);
129 char physaddr_str[64];
132 /* first, check if this segment is IOVA-adjacent to
135 snprintf(physaddr_str, sizeof(physaddr_str),
136 "hw.contigmem.physaddr.%d", j);
137 error = sysctlbyname(physaddr_str, &physaddr,
138 &sysctl_size, NULL, 0);
140 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
141 "from %s\n", j, hpi->hugedir);
145 is_adjacent = prev_end != 0 && physaddr == prev_end;
146 prev_end = physaddr + hpi->hugepage_sz;
148 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
150 bool empty, need_hole;
151 msl = &mcfg->memsegs[msl_idx];
152 arr = &msl->memseg_arr;
154 if (msl->page_sz != page_sz)
157 empty = arr->count == 0;
159 /* we need a hole if this isn't an empty memseg
160 * list, and if previous segment was not
161 * adjacent to current one.
163 need_hole = !empty && !is_adjacent;
165 /* we need 1, plus hole if not adjacent */
166 ms_idx = rte_fbarray_find_next_n_free(arr,
167 0, 1 + (need_hole ? 1 : 0));
169 /* memseg list is full? */
173 if (need_hole && prev_ms_idx == ms_idx - 1)
175 prev_ms_idx = ms_idx;
179 if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
180 RTE_LOG(ERR, EAL, "Could not find space for memseg. Please increase %s and/or %s in configuration.\n",
181 RTE_STR(CONFIG_RTE_MAX_MEMSEG_PER_TYPE),
182 RTE_STR(CONFIG_RTE_MAX_MEM_PER_TYPE));
185 arr = &msl->memseg_arr;
186 seg = rte_fbarray_get(arr, ms_idx);
188 addr = RTE_PTR_ADD(msl->base_va,
189 (size_t)msl->page_sz * ms_idx);
191 /* address is already mapped in memseg list, so using
192 * MAP_FIXED here is safe.
194 addr = mmap(addr, page_sz, PROT_READ|PROT_WRITE,
195 MAP_SHARED | MAP_FIXED,
196 hpi->lock_descriptor,
198 if (addr == MAP_FAILED) {
199 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
205 seg->iova = physaddr;
206 seg->hugepage_sz = page_sz;
208 seg->nchannel = mcfg->nchannel;
209 seg->nrank = mcfg->nrank;
212 rte_fbarray_set_used(arr, ms_idx);
214 RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
216 seg_idx++, addr, physaddr, page_sz);
218 total_mem += seg->len;
220 if (total_mem >= internal_config.memory)
223 if (total_mem < internal_config.memory) {
224 RTE_LOG(ERR, EAL, "Couldn't reserve requested memory, "
225 "requested: %" PRIu64 "M "
226 "available: %" PRIu64 "M\n",
227 internal_config.memory >> 20, total_mem >> 20);
233 struct attach_walk_args {
238 attach_segment(const struct rte_memseg_list *msl __rte_unused,
239 const struct rte_memseg *ms, void *arg)
241 struct attach_walk_args *wa = arg;
244 addr = mmap(ms->addr, ms->len, PROT_READ | PROT_WRITE,
245 MAP_SHARED | MAP_FIXED, wa->fd_hugepage,
246 wa->seg_idx * EAL_PAGE_SIZE);
247 if (addr == MAP_FAILED || addr != ms->addr)
255 rte_eal_hugepage_attach(void)
257 const struct hugepage_info *hpi;
258 int fd_hugepage = -1;
261 hpi = &internal_config.hugepage_info[0];
263 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
264 const struct hugepage_info *cur_hpi = &hpi[i];
265 struct attach_walk_args wa;
267 memset(&wa, 0, sizeof(wa));
269 /* Obtain a file descriptor for contiguous memory */
270 fd_hugepage = open(cur_hpi->hugedir, O_RDWR);
271 if (fd_hugepage < 0) {
272 RTE_LOG(ERR, EAL, "Could not open %s\n",
276 wa.fd_hugepage = fd_hugepage;
279 /* Map the contiguous memory into each memory segment */
280 if (rte_memseg_walk(attach_segment, &wa) < 0) {
281 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
282 wa.seg_idx, cur_hpi->hugedir);
290 /* hugepage_info is no longer required */
294 if (fd_hugepage >= 0)
300 rte_eal_using_phys_addrs(void)
306 get_mem_amount(uint64_t page_sz, uint64_t max_mem)
308 uint64_t area_sz, max_pages;
310 /* limit to RTE_MAX_MEMSEG_PER_LIST pages or RTE_MAX_MEM_MB_PER_LIST */
311 max_pages = RTE_MAX_MEMSEG_PER_LIST;
312 max_mem = RTE_MIN((uint64_t)RTE_MAX_MEM_MB_PER_LIST << 20, max_mem);
314 area_sz = RTE_MIN(page_sz * max_pages, max_mem);
316 /* make sure the list isn't smaller than the page size */
317 area_sz = RTE_MAX(area_sz, page_sz);
319 return RTE_ALIGN(area_sz, page_sz);
322 #define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
324 alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
325 int n_segs, int socket_id, int type_msl_idx)
327 char name[RTE_FBARRAY_NAME_LEN];
329 snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
331 if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
332 sizeof(struct rte_memseg))) {
333 RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
334 rte_strerror(rte_errno));
338 msl->page_sz = page_sz;
339 msl->socket_id = socket_id;
342 RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
343 (size_t)page_sz >> 10, socket_id);
349 alloc_va_space(struct rte_memseg_list *msl)
356 #ifdef RTE_ARCH_PPC_64
357 flags |= MAP_HUGETLB;
360 page_sz = msl->page_sz;
361 mem_sz = page_sz * msl->memseg_arr.len;
363 addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
365 if (rte_errno == EADDRNOTAVAIL)
366 RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - please use '--base-virtaddr' option\n",
367 (unsigned long long)mem_sz, msl->base_va);
369 RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
379 memseg_primary_init(void)
381 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
382 int hpi_idx, msl_idx = 0;
383 struct rte_memseg_list *msl;
384 uint64_t max_mem, total_mem;
386 /* no-huge does not need this at all */
387 if (internal_config.no_hugetlbfs)
390 /* FreeBSD has an issue where core dump will dump the entire memory
391 * contents, including anonymous zero-page memory. Therefore, while we
392 * will be limiting total amount of memory to RTE_MAX_MEM_MB, we will
393 * also be further limiting total memory amount to whatever memory is
394 * available to us through contigmem driver (plus spacing blocks).
396 * so, at each stage, we will be checking how much memory we are
397 * preallocating, and adjust all the values accordingly.
400 max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
403 /* create memseg lists */
404 for (hpi_idx = 0; hpi_idx < (int) internal_config.num_hugepage_sizes;
406 uint64_t max_type_mem, total_type_mem = 0;
408 int type_msl_idx, max_segs, avail_segs, total_segs = 0;
409 struct hugepage_info *hpi;
410 uint64_t hugepage_sz;
412 hpi = &internal_config.hugepage_info[hpi_idx];
413 hugepage_sz = hpi->hugepage_sz;
415 /* no NUMA support on FreeBSD */
417 /* check if we've already exceeded total memory amount */
418 if (total_mem >= max_mem)
421 /* first, calculate theoretical limits according to config */
422 max_type_mem = RTE_MIN(max_mem - total_mem,
423 (uint64_t)RTE_MAX_MEM_MB_PER_TYPE << 20);
424 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
426 /* now, limit all of that to whatever will actually be
427 * available to us, because without dynamic allocation support,
428 * all of that extra memory will be sitting there being useless
429 * and slowing down core dumps in case of a crash.
431 * we need (N*2)-1 segments because we cannot guarantee that
432 * each segment will be IOVA-contiguous with the previous one,
433 * so we will allocate more and put spaces inbetween segments
434 * that are non-contiguous.
436 avail_segs = (hpi->num_pages[0] * 2) - 1;
437 avail_mem = avail_segs * hugepage_sz;
439 max_type_mem = RTE_MIN(avail_mem, max_type_mem);
440 max_segs = RTE_MIN(avail_segs, max_segs);
443 while (total_type_mem < max_type_mem &&
444 total_segs < max_segs) {
445 uint64_t cur_max_mem, cur_mem;
448 if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
450 "No more space in memseg lists, please increase %s\n",
451 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
455 msl = &mcfg->memsegs[msl_idx++];
457 cur_max_mem = max_type_mem - total_type_mem;
459 cur_mem = get_mem_amount(hugepage_sz,
461 n_segs = cur_mem / hugepage_sz;
463 if (alloc_memseg_list(msl, hugepage_sz, n_segs,
467 total_segs += msl->memseg_arr.len;
468 total_type_mem = total_segs * hugepage_sz;
471 if (alloc_va_space(msl)) {
472 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
476 total_mem += total_type_mem;
482 memseg_secondary_init(void)
484 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
486 struct rte_memseg_list *msl;
488 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
490 msl = &mcfg->memsegs[msl_idx];
492 /* skip empty memseg lists */
493 if (msl->memseg_arr.len == 0)
496 if (rte_fbarray_attach(&msl->memseg_arr)) {
497 RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
501 /* preallocate VA space */
502 if (alloc_va_space(msl)) {
503 RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
512 rte_eal_memseg_init(void)
514 return rte_eal_process_type() == RTE_PROC_PRIMARY ?
515 memseg_primary_init() :
516 memseg_secondary_init();