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->socket_id = 0;
  83
  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;
  87
  88                         ms = rte_fbarray_get(arr, cur_seg);
  89                         if (rte_eal_iova_mode() == RTE_IOVA_VA)
  90                                 ms->iova = (uintptr_t)addr;
  91                         else
  92                                 ms->iova = RTE_BAD_IOVA;
  93                         ms->addr = addr;
  94                         ms->hugepage_sz = page_sz;
  95                         ms->len = page_sz;
  96                         ms->socket_id = 0;
  97
  98                         rte_fbarray_set_used(arr, cur_seg);
  99
 100                         addr = RTE_PTR_ADD(addr, page_sz);
 101                 }
 102                 return 0;
 103         }
 104
 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;
 112
 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,
 117                                 page_sz);
 118
 119                 n_pages = RTE_MIN(mem_needed / page_sz, max_pages);
 120
 121                 for (j = 0; j < n_pages; j++) {
 122                         struct rte_memseg_list *msl;
 123                         struct rte_fbarray *arr;
 124                         struct rte_memseg *seg;
 125                         int msl_idx, ms_idx;
 126                         rte_iova_t physaddr;
 127                         int error;
 128                         size_t sysctl_size = sizeof(physaddr);
 129                         char physaddr_str[64];
 130                         bool is_adjacent;
 131
 132                         /* first, check if this segment is IOVA-adjacent to
 133                          * the previous one.
 134                          */
 135                         snprintf(physaddr_str, sizeof(physaddr_str),
 136                                         "hw.contigmem.physaddr.%d", j);
 137                         error = sysctlbyname(physaddr_str, &physaddr,
 138                                         &sysctl_size, NULL, 0);
 139                         if (error < 0) {
 140                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 141                                                 "from %s\n", j, hpi->hugedir);
 142                                 return -1;
 143                         }
 144
 145                         is_adjacent = prev_end != 0 && physaddr == prev_end;
 146                         prev_end = physaddr + hpi->hugepage_sz;
 147
 148                         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
 149                                         msl_idx++) {
 150                                 bool empty, need_hole;
 151                                 msl = &mcfg->memsegs[msl_idx];
 152                                 arr = &msl->memseg_arr;
 153
 154                                 if (msl->page_sz != page_sz)
 155                                         continue;
 156
 157                                 empty = arr->count == 0;
 158
 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.
 162                                  */
 163                                 need_hole = !empty && !is_adjacent;
 164
 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));
 168
 169                                 /* memseg list is full? */
 170                                 if (ms_idx < 0)
 171                                         continue;
 172
 173                                 if (need_hole && prev_ms_idx == ms_idx - 1)
 174                                         ms_idx++;
 175                                 prev_ms_idx = ms_idx;
 176
 177                                 break;
 178                         }
 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));
 183                                 return -1;
 184                         }
 185                         arr = &msl->memseg_arr;
 186                         seg = rte_fbarray_get(arr, ms_idx);
 187
 188                         addr = RTE_PTR_ADD(msl->base_va,
 189                                         (size_t)msl->page_sz * ms_idx);
 190
 191                         /* address is already mapped in memseg list, so using
 192                          * MAP_FIXED here is safe.
 193                          */
 194                         addr = mmap(addr, page_sz, PROT_READ|PROT_WRITE,
 195                                         MAP_SHARED | MAP_FIXED,
 196                                         hpi->lock_descriptor,
 197                                         j * EAL_PAGE_SIZE);
 198                         if (addr == MAP_FAILED) {
 199                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 200                                                 j, hpi->hugedir);
 201                                 return -1;
 202                         }
 203
 204                         seg->addr = addr;
 205                         seg->iova = physaddr;
 206                         seg->hugepage_sz = page_sz;
 207                         seg->len = page_sz;
 208                         seg->nchannel = mcfg->nchannel;
 209                         seg->nrank = mcfg->nrank;
 210                         seg->socket_id = 0;
 211
 212                         rte_fbarray_set_used(arr, ms_idx);
 213
 214                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 215                                         PRIx64", len %zu\n",
 216                                         seg_idx++, addr, physaddr, page_sz);
 217
 218                         total_mem += seg->len;
 219                 }
 220                 if (total_mem >= internal_config.memory)
 221                         break;
 222         }
 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);
 228                 return -1;
 229         }
 230         return 0;
 231 }
 232
 233 struct attach_walk_args {
 234         int fd_hugepage;
 235         int seg_idx;
 236 };
 237 static int
 238 attach_segment(const struct rte_memseg_list *msl __rte_unused,
 239                 const struct rte_memseg *ms, void *arg)
 240 {
 241         struct attach_walk_args *wa = arg;
 242         void *addr;
 243
 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)
 248                 return -1;
 249         wa->seg_idx++;
 250
 251         return 0;
 252 }
 253
 254 int
 255 rte_eal_hugepage_attach(void)
 256 {
 257         const struct hugepage_info *hpi;
 258         int fd_hugepage = -1;
 259         unsigned int i;
 260
 261         hpi = &internal_config.hugepage_info[0];
 262
 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;
 266
 267                 memset(&wa, 0, sizeof(wa));
 268
 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",
 273                                         cur_hpi->hugedir);
 274                         goto error;
 275                 }
 276                 wa.fd_hugepage = fd_hugepage;
 277                 wa.seg_idx = 0;
 278
 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);
 283                         goto error;
 284                 }
 285
 286                 close(fd_hugepage);
 287                 fd_hugepage = -1;
 288         }
 289
 290         /* hugepage_info is no longer required */
 291         return 0;
 292
 293 error:
 294         if (fd_hugepage >= 0)
 295                 close(fd_hugepage);
 296         return -1;
 297 }
 298
 299 int
 300 rte_eal_using_phys_addrs(void)
 301 {
 302         return 0;
 303 }
 304
 305 static uint64_t
 306 get_mem_amount(uint64_t page_sz, uint64_t max_mem)
 307 {
 308         uint64_t area_sz, max_pages;
 309
 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);
 313
 314         area_sz = RTE_MIN(page_sz * max_pages, max_mem);
 315
 316         /* make sure the list isn't smaller than the page size */
 317         area_sz = RTE_MAX(area_sz, page_sz);
 318
 319         return RTE_ALIGN(area_sz, page_sz);
 320 }
 321
 322 #define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
 323 static int
 324 alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
 325                 int n_segs, int socket_id, int type_msl_idx)
 326 {
 327         char name[RTE_FBARRAY_NAME_LEN];
 328
 329         snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
 330                  type_msl_idx);
 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));
 335                 return -1;
 336         }
 337
 338         msl->page_sz = page_sz;
 339         msl->socket_id = socket_id;
 340         msl->base_va = NULL;
 341
 342         RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
 343                         (size_t)page_sz >> 10, socket_id);
 344
 345         return 0;
 346 }
 347
 348 static int
 349 alloc_va_space(struct rte_memseg_list *msl)
 350 {
 351         uint64_t page_sz;
 352         size_t mem_sz;
 353         void *addr;
 354         int flags = 0;
 355
 356 #ifdef RTE_ARCH_PPC_64
 357         flags |= MAP_HUGETLB;
 358 #endif
 359
 360         page_sz = msl->page_sz;
 361         mem_sz = page_sz * msl->memseg_arr.len;
 362
 363         addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
 364         if (addr == NULL) {
 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);
 368                 else
 369                         RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
 370                 return -1;
 371         }
 372         msl->base_va = addr;
 373
 374         return 0;
 375 }
 376
 377
 378 static int
 379 memseg_primary_init(void)
 380 {
 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;
 385
 386         /* no-huge does not need this at all */
 387         if (internal_config.no_hugetlbfs)
 388                 return 0;
 389
 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).
 395          *
 396          * so, at each stage, we will be checking how much memory we are
 397          * preallocating, and adjust all the values accordingly.
 398          */
 399
 400         max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
 401         total_mem = 0;
 402
 403         /* create memseg lists */
 404         for (hpi_idx = 0; hpi_idx < (int) internal_config.num_hugepage_sizes;
 405                         hpi_idx++) {
 406                 uint64_t max_type_mem, total_type_mem = 0;
 407                 uint64_t avail_mem;
 408                 int type_msl_idx, max_segs, avail_segs, total_segs = 0;
 409                 struct hugepage_info *hpi;
 410                 uint64_t hugepage_sz;
 411
 412                 hpi = &internal_config.hugepage_info[hpi_idx];
 413                 hugepage_sz = hpi->hugepage_sz;
 414
 415                 /* no NUMA support on FreeBSD */
 416
 417                 /* check if we've already exceeded total memory amount */
 418                 if (total_mem >= max_mem)
 419                         break;
 420
 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;
 425
 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.
 430                  *
 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.
 435                  */
 436                 avail_segs = (hpi->num_pages[0] * 2) - 1;
 437                 avail_mem = avail_segs * hugepage_sz;
 438
 439                 max_type_mem = RTE_MIN(avail_mem, max_type_mem);
 440                 max_segs = RTE_MIN(avail_segs, max_segs);
 441
 442                 type_msl_idx = 0;
 443                 while (total_type_mem < max_type_mem &&
 444                                 total_segs < max_segs) {
 445                         uint64_t cur_max_mem, cur_mem;
 446                         unsigned int n_segs;
 447
 448                         if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
 449                                 RTE_LOG(ERR, EAL,
 450                                         "No more space in memseg lists, please increase %s\n",
 451                                         RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
 452                                 return -1;
 453                         }
 454
 455                         msl = &mcfg->memsegs[msl_idx++];
 456
 457                         cur_max_mem = max_type_mem - total_type_mem;
 458
 459                         cur_mem = get_mem_amount(hugepage_sz,
 460                                         cur_max_mem);
 461                         n_segs = cur_mem / hugepage_sz;
 462
 463                         if (alloc_memseg_list(msl, hugepage_sz, n_segs,
 464                                         0, type_msl_idx))
 465                                 return -1;
 466
 467                         total_segs += msl->memseg_arr.len;
 468                         total_type_mem = total_segs * hugepage_sz;
 469                         type_msl_idx++;
 470
 471                         if (alloc_va_space(msl)) {
 472                                 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
 473                                 return -1;
 474                         }
 475                 }
 476                 total_mem += total_type_mem;
 477         }
 478         return 0;
 479 }
 480
 481 static int
 482 memseg_secondary_init(void)
 483 {
 484         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 485         int msl_idx = 0;
 486         struct rte_memseg_list *msl;
 487
 488         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
 489
 490                 msl = &mcfg->memsegs[msl_idx];
 491
 492                 /* skip empty memseg lists */
 493                 if (msl->memseg_arr.len == 0)
 494                         continue;
 495
 496                 if (rte_fbarray_attach(&msl->memseg_arr)) {
 497                         RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
 498                         return -1;
 499                 }
 500
 501                 /* preallocate VA space */
 502                 if (alloc_va_space(msl)) {
 503                         RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
 504                         return -1;
 505                 }
 506         }
 507
 508         return 0;
 509 }
 510
 511 int
 512 rte_eal_memseg_init(void)
 513 {
 514         return rte_eal_process_type() == RTE_PROC_PRIMARY ?
 515                         memseg_primary_init() :
 516                         memseg_secondary_init();
 517 }