lib/librte_eal/bsdapp/eal/eal_memory.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4 #include <sys/mman.h>
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/sysctl.h>
   8 #include <inttypes.h>
   9 #include <errno.h>
  10 #include <string.h>
  11 #include <fcntl.h>
  12
  13 #include <rte_eal.h>
  14 #include <rte_eal_memconfig.h>
  15 #include <rte_errno.h>
  16 #include <rte_log.h>
  17 #include <rte_string_fns.h>
  18 #include "eal_private.h"
  19 #include "eal_internal_cfg.h"
  20 #include "eal_filesystem.h"
  21
  22 #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
  23
  24 /*
  25  * Get physical address of any mapped virtual address in the current process.
  26  */
  27 phys_addr_t
  28 rte_mem_virt2phy(const void *virtaddr)
  29 {
  30         /* XXX not implemented. This function is only used by
  31          * rte_mempool_virt2iova() when hugepages are disabled. */
  32         (void)virtaddr;
  33         return RTE_BAD_IOVA;
  34 }
  35 rte_iova_t
  36 rte_mem_virt2iova(const void *virtaddr)
  37 {
  38         return rte_mem_virt2phy(virtaddr);
  39 }
  40
  41 int
  42 rte_eal_hugepage_init(void)
  43 {
  44         struct rte_mem_config *mcfg;
  45         uint64_t total_mem = 0;
  46         void *addr;
  47         unsigned int i, j, seg_idx = 0;
  48
  49         /* get pointer to global configuration */
  50         mcfg = rte_eal_get_configuration()->mem_config;
  51
  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;
  57                 uint64_t page_sz;
  58                 int n_segs, cur_seg;
  59
  60                 /* create a memseg list */
  61                 msl = &mcfg->memsegs[0];
  62
  63                 page_sz = RTE_PGSIZE_4K;
  64                 n_segs = internal_config.memory / page_sz;
  65
  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");
  69                         return -1;
  70                 }
  71
  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__,
  77                                         strerror(errno));
  78                         return -1;
  79                 }
  80                 msl->base_va = addr;
  81                 msl->page_sz = page_sz;
  82                 msl->len = internal_config.memory;
  83                 msl->socket_id = 0;
  84
  85                 /* populate memsegs. each memseg is 1 page long */
  86                 for (cur_seg = 0; cur_seg < n_segs; cur_seg++) {
  87                         arr = &msl->memseg_arr;
  88
  89                         ms = rte_fbarray_get(arr, cur_seg);
  90                         if (rte_eal_iova_mode() == RTE_IOVA_VA)
  91                                 ms->iova = (uintptr_t)addr;
  92                         else
  93                                 ms->iova = RTE_BAD_IOVA;
  94                         ms->addr = addr;
  95                         ms->hugepage_sz = page_sz;
  96                         ms->len = page_sz;
  97                         ms->socket_id = 0;
  98
  99                         rte_fbarray_set_used(arr, cur_seg);
 100
 101                         addr = RTE_PTR_ADD(addr, page_sz);
 102                 }
 103                 return 0;
 104         }
 105
 106         /* map all hugepages and sort them */
 107         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
 108                 struct hugepage_info *hpi;
 109                 rte_iova_t prev_end = 0;
 110                 int prev_ms_idx = -1;
 111                 uint64_t page_sz, mem_needed;
 112                 unsigned int n_pages, max_pages;
 113
 114                 hpi = &internal_config.hugepage_info[i];
 115                 page_sz = hpi->hugepage_sz;
 116                 max_pages = hpi->num_pages[0];
 117                 mem_needed = RTE_ALIGN_CEIL(internal_config.memory - total_mem,
 118                                 page_sz);
 119
 120                 n_pages = RTE_MIN(mem_needed / page_sz, max_pages);
 121
 122                 for (j = 0; j < n_pages; j++) {
 123                         struct rte_memseg_list *msl;
 124                         struct rte_fbarray *arr;
 125                         struct rte_memseg *seg;
 126                         int msl_idx, ms_idx;
 127                         rte_iova_t physaddr;
 128                         int error;
 129                         size_t sysctl_size = sizeof(physaddr);
 130                         char physaddr_str[64];
 131                         bool is_adjacent;
 132
 133                         /* first, check if this segment is IOVA-adjacent to
 134                          * the previous one.
 135                          */
 136                         snprintf(physaddr_str, sizeof(physaddr_str),
 137                                         "hw.contigmem.physaddr.%d", j);
 138                         error = sysctlbyname(physaddr_str, &physaddr,
 139                                         &sysctl_size, NULL, 0);
 140                         if (error < 0) {
 141                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 142                                                 "from %s\n", j, hpi->hugedir);
 143                                 return -1;
 144                         }
 145
 146                         is_adjacent = prev_end != 0 && physaddr == prev_end;
 147                         prev_end = physaddr + hpi->hugepage_sz;
 148
 149                         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
 150                                         msl_idx++) {
 151                                 bool empty, need_hole;
 152                                 msl = &mcfg->memsegs[msl_idx];
 153                                 arr = &msl->memseg_arr;
 154
 155                                 if (msl->page_sz != page_sz)
 156                                         continue;
 157
 158                                 empty = arr->count == 0;
 159
 160                                 /* we need a hole if this isn't an empty memseg
 161                                  * list, and if previous segment was not
 162                                  * adjacent to current one.
 163                                  */
 164                                 need_hole = !empty && !is_adjacent;
 165
 166                                 /* we need 1, plus hole if not adjacent */
 167                                 ms_idx = rte_fbarray_find_next_n_free(arr,
 168                                                 0, 1 + (need_hole ? 1 : 0));
 169
 170                                 /* memseg list is full? */
 171                                 if (ms_idx < 0)
 172                                         continue;
 173
 174                                 if (need_hole && prev_ms_idx == ms_idx - 1)
 175                                         ms_idx++;
 176                                 prev_ms_idx = ms_idx;
 177
 178                                 break;
 179                         }
 180                         if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
 181                                 RTE_LOG(ERR, EAL, "Could not find space for memseg. Please increase %s and/or %s in configuration.\n",
 182                                         RTE_STR(CONFIG_RTE_MAX_MEMSEG_PER_TYPE),
 183                                         RTE_STR(CONFIG_RTE_MAX_MEM_PER_TYPE));
 184                                 return -1;
 185                         }
 186                         arr = &msl->memseg_arr;
 187                         seg = rte_fbarray_get(arr, ms_idx);
 188
 189                         addr = RTE_PTR_ADD(msl->base_va,
 190                                         (size_t)msl->page_sz * ms_idx);
 191
 192                         /* address is already mapped in memseg list, so using
 193                          * MAP_FIXED here is safe.
 194                          */
 195                         addr = mmap(addr, page_sz, PROT_READ|PROT_WRITE,
 196                                         MAP_SHARED | MAP_FIXED,
 197                                         hpi->lock_descriptor,
 198                                         j * EAL_PAGE_SIZE);
 199                         if (addr == MAP_FAILED) {
 200                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 201                                                 j, hpi->hugedir);
 202                                 return -1;
 203                         }
 204
 205                         seg->addr = addr;
 206                         seg->iova = physaddr;
 207                         seg->hugepage_sz = page_sz;
 208                         seg->len = page_sz;
 209                         seg->nchannel = mcfg->nchannel;
 210                         seg->nrank = mcfg->nrank;
 211                         seg->socket_id = 0;
 212
 213                         rte_fbarray_set_used(arr, ms_idx);
 214
 215                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 216                                         PRIx64", len %zu\n",
 217                                         seg_idx++, addr, physaddr, page_sz);
 218
 219                         total_mem += seg->len;
 220                 }
 221                 if (total_mem >= internal_config.memory)
 222                         break;
 223         }
 224         if (total_mem < internal_config.memory) {
 225                 RTE_LOG(ERR, EAL, "Couldn't reserve requested memory, "
 226                                 "requested: %" PRIu64 "M "
 227                                 "available: %" PRIu64 "M\n",
 228                                 internal_config.memory >> 20, total_mem >> 20);
 229                 return -1;
 230         }
 231         return 0;
 232 }
 233
 234 struct attach_walk_args {
 235         int fd_hugepage;
 236         int seg_idx;
 237 };
 238 static int
 239 attach_segment(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
 240                 void *arg)
 241 {
 242         struct attach_walk_args *wa = arg;
 243         void *addr;
 244
 245         if (msl->external)
 246                 return 0;
 247
 248         addr = mmap(ms->addr, ms->len, PROT_READ | PROT_WRITE,
 249                         MAP_SHARED | MAP_FIXED, wa->fd_hugepage,
 250                         wa->seg_idx * EAL_PAGE_SIZE);
 251         if (addr == MAP_FAILED || addr != ms->addr)
 252                 return -1;
 253         wa->seg_idx++;
 254
 255         return 0;
 256 }
 257
 258 int
 259 rte_eal_hugepage_attach(void)
 260 {
 261         const struct hugepage_info *hpi;
 262         int fd_hugepage = -1;
 263         unsigned int i;
 264
 265         hpi = &internal_config.hugepage_info[0];
 266
 267         for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
 268                 const struct hugepage_info *cur_hpi = &hpi[i];
 269                 struct attach_walk_args wa;
 270
 271                 memset(&wa, 0, sizeof(wa));
 272
 273                 /* Obtain a file descriptor for contiguous memory */
 274                 fd_hugepage = open(cur_hpi->hugedir, O_RDWR);
 275                 if (fd_hugepage < 0) {
 276                         RTE_LOG(ERR, EAL, "Could not open %s\n",
 277                                         cur_hpi->hugedir);
 278                         goto error;
 279                 }
 280                 wa.fd_hugepage = fd_hugepage;
 281                 wa.seg_idx = 0;
 282
 283                 /* Map the contiguous memory into each memory segment */
 284                 if (rte_memseg_walk(attach_segment, &wa) < 0) {
 285                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 286                                 wa.seg_idx, cur_hpi->hugedir);
 287                         goto error;
 288                 }
 289
 290                 close(fd_hugepage);
 291                 fd_hugepage = -1;
 292         }
 293
 294         /* hugepage_info is no longer required */
 295         return 0;
 296
 297 error:
 298         if (fd_hugepage >= 0)
 299                 close(fd_hugepage);
 300         return -1;
 301 }
 302
 303 int
 304 rte_eal_using_phys_addrs(void)
 305 {
 306         return 0;
 307 }
 308
 309 static uint64_t
 310 get_mem_amount(uint64_t page_sz, uint64_t max_mem)
 311 {
 312         uint64_t area_sz, max_pages;
 313
 314         /* limit to RTE_MAX_MEMSEG_PER_LIST pages or RTE_MAX_MEM_MB_PER_LIST */
 315         max_pages = RTE_MAX_MEMSEG_PER_LIST;
 316         max_mem = RTE_MIN((uint64_t)RTE_MAX_MEM_MB_PER_LIST << 20, max_mem);
 317
 318         area_sz = RTE_MIN(page_sz * max_pages, max_mem);
 319
 320         /* make sure the list isn't smaller than the page size */
 321         area_sz = RTE_MAX(area_sz, page_sz);
 322
 323         return RTE_ALIGN(area_sz, page_sz);
 324 }
 325
 326 #define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
 327 static int
 328 alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
 329                 int n_segs, int socket_id, int type_msl_idx)
 330 {
 331         char name[RTE_FBARRAY_NAME_LEN];
 332
 333         snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
 334                  type_msl_idx);
 335         if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
 336                         sizeof(struct rte_memseg))) {
 337                 RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
 338                         rte_strerror(rte_errno));
 339                 return -1;
 340         }
 341
 342         msl->page_sz = page_sz;
 343         msl->socket_id = socket_id;
 344         msl->base_va = NULL;
 345
 346         RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
 347                         (size_t)page_sz >> 10, socket_id);
 348
 349         return 0;
 350 }
 351
 352 static int
 353 alloc_va_space(struct rte_memseg_list *msl)
 354 {
 355         uint64_t page_sz;
 356         size_t mem_sz;
 357         void *addr;
 358         int flags = 0;
 359
 360 #ifdef RTE_ARCH_PPC_64
 361         flags |= MAP_HUGETLB;
 362 #endif
 363
 364         page_sz = msl->page_sz;
 365         mem_sz = page_sz * msl->memseg_arr.len;
 366
 367         addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
 368         if (addr == NULL) {
 369                 if (rte_errno == EADDRNOTAVAIL)
 370                         RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - please use '--base-virtaddr' option\n",
 371                                 (unsigned long long)mem_sz, msl->base_va);
 372                 else
 373                         RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
 374                 return -1;
 375         }
 376         msl->base_va = addr;
 377         msl->len = mem_sz;
 378
 379         return 0;
 380 }
 381
 382
 383 static int
 384 memseg_primary_init(void)
 385 {
 386         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 387         int hpi_idx, msl_idx = 0;
 388         struct rte_memseg_list *msl;
 389         uint64_t max_mem, total_mem;
 390
 391         /* no-huge does not need this at all */
 392         if (internal_config.no_hugetlbfs)
 393                 return 0;
 394
 395         /* FreeBSD has an issue where core dump will dump the entire memory
 396          * contents, including anonymous zero-page memory. Therefore, while we
 397          * will be limiting total amount of memory to RTE_MAX_MEM_MB, we will
 398          * also be further limiting total memory amount to whatever memory is
 399          * available to us through contigmem driver (plus spacing blocks).
 400          *
 401          * so, at each stage, we will be checking how much memory we are
 402          * preallocating, and adjust all the values accordingly.
 403          */
 404
 405         max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
 406         total_mem = 0;
 407
 408         /* create memseg lists */
 409         for (hpi_idx = 0; hpi_idx < (int) internal_config.num_hugepage_sizes;
 410                         hpi_idx++) {
 411                 uint64_t max_type_mem, total_type_mem = 0;
 412                 uint64_t avail_mem;
 413                 int type_msl_idx, max_segs, avail_segs, total_segs = 0;
 414                 struct hugepage_info *hpi;
 415                 uint64_t hugepage_sz;
 416
 417                 hpi = &internal_config.hugepage_info[hpi_idx];
 418                 hugepage_sz = hpi->hugepage_sz;
 419
 420                 /* no NUMA support on FreeBSD */
 421
 422                 /* check if we've already exceeded total memory amount */
 423                 if (total_mem >= max_mem)
 424                         break;
 425
 426                 /* first, calculate theoretical limits according to config */
 427                 max_type_mem = RTE_MIN(max_mem - total_mem,
 428                         (uint64_t)RTE_MAX_MEM_MB_PER_TYPE << 20);
 429                 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
 430
 431                 /* now, limit all of that to whatever will actually be
 432                  * available to us, because without dynamic allocation support,
 433                  * all of that extra memory will be sitting there being useless
 434                  * and slowing down core dumps in case of a crash.
 435                  *
 436                  * we need (N*2)-1 segments because we cannot guarantee that
 437                  * each segment will be IOVA-contiguous with the previous one,
 438                  * so we will allocate more and put spaces inbetween segments
 439                  * that are non-contiguous.
 440                  */
 441                 avail_segs = (hpi->num_pages[0] * 2) - 1;
 442                 avail_mem = avail_segs * hugepage_sz;
 443
 444                 max_type_mem = RTE_MIN(avail_mem, max_type_mem);
 445                 max_segs = RTE_MIN(avail_segs, max_segs);
 446
 447                 type_msl_idx = 0;
 448                 while (total_type_mem < max_type_mem &&
 449                                 total_segs < max_segs) {
 450                         uint64_t cur_max_mem, cur_mem;
 451                         unsigned int n_segs;
 452
 453                         if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
 454                                 RTE_LOG(ERR, EAL,
 455                                         "No more space in memseg lists, please increase %s\n",
 456                                         RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
 457                                 return -1;
 458                         }
 459
 460                         msl = &mcfg->memsegs[msl_idx++];
 461
 462                         cur_max_mem = max_type_mem - total_type_mem;
 463
 464                         cur_mem = get_mem_amount(hugepage_sz,
 465                                         cur_max_mem);
 466                         n_segs = cur_mem / hugepage_sz;
 467
 468                         if (alloc_memseg_list(msl, hugepage_sz, n_segs,
 469                                         0, type_msl_idx))
 470                                 return -1;
 471
 472                         total_segs += msl->memseg_arr.len;
 473                         total_type_mem = total_segs * hugepage_sz;
 474                         type_msl_idx++;
 475
 476                         if (alloc_va_space(msl)) {
 477                                 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
 478                                 return -1;
 479                         }
 480                 }
 481                 total_mem += total_type_mem;
 482         }
 483         return 0;
 484 }
 485
 486 static int
 487 memseg_secondary_init(void)
 488 {
 489         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 490         int msl_idx = 0;
 491         struct rte_memseg_list *msl;
 492
 493         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
 494
 495                 msl = &mcfg->memsegs[msl_idx];
 496
 497                 /* skip empty memseg lists */
 498                 if (msl->memseg_arr.len == 0)
 499                         continue;
 500
 501                 if (rte_fbarray_attach(&msl->memseg_arr)) {
 502                         RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
 503                         return -1;
 504                 }
 505
 506                 /* preallocate VA space */
 507                 if (alloc_va_space(msl)) {
 508                         RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
 509                         return -1;
 510                 }
 511         }
 512
 513         return 0;
 514 }
 515
 516 int
 517 rte_eal_memseg_init(void)
 518 {
 519         return rte_eal_process_type() == RTE_PROC_PRIMARY ?
 520                         memseg_primary_init() :
 521                         memseg_secondary_init();
 522 }