lib/librte_eal/freebsd/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_errno.h>
  15 #include <rte_log.h>
  16 #include <rte_string_fns.h>
  17
  18 #include "eal_private.h"
  19 #include "eal_internal_cfg.h"
  20 #include "eal_filesystem.h"
  21 #include "eal_memcfg.h"
  22 #include "eal_options.h"
  23
  24 #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
  25
  26 uint64_t eal_get_baseaddr(void)
  27 {
  28         /*
  29          * FreeBSD may allocate something in the space we will be mapping things
  30          * before we get a chance to do that, so use a base address that's far
  31          * away from where malloc() et al usually map things.
  32          */
  33         return 0x1000000000ULL;
  34 }
  35
  36 /*
  37  * Get physical address of any mapped virtual address in the current process.
  38  */
  39 phys_addr_t
  40 rte_mem_virt2phy(const void *virtaddr)
  41 {
  42         /* XXX not implemented. This function is only used by
  43          * rte_mempool_virt2iova() when hugepages are disabled. */
  44         (void)virtaddr;
  45         return RTE_BAD_IOVA;
  46 }
  47 rte_iova_t
  48 rte_mem_virt2iova(const void *virtaddr)
  49 {
  50         return rte_mem_virt2phy(virtaddr);
  51 }
  52
  53 int
  54 rte_eal_hugepage_init(void)
  55 {
  56         struct rte_mem_config *mcfg;
  57         uint64_t total_mem = 0;
  58         void *addr;
  59         unsigned int i, j, seg_idx = 0;
  60         struct internal_config *internal_conf =
  61                 eal_get_internal_configuration();
  62
  63         /* get pointer to global configuration */
  64         mcfg = rte_eal_get_configuration()->mem_config;
  65
  66         /* for debug purposes, hugetlbfs can be disabled */
  67         if (internal_conf->no_hugetlbfs) {
  68                 struct rte_memseg_list *msl;
  69                 uint64_t mem_sz, page_sz;
  70                 int n_segs;
  71
  72                 /* create a memseg list */
  73                 msl = &mcfg->memsegs[0];
  74
  75                 mem_sz = internal_conf->memory;
  76                 page_sz = RTE_PGSIZE_4K;
  77                 n_segs = mem_sz / page_sz;
  78
  79                 if (eal_memseg_list_init_named(
  80                                 msl, "nohugemem", page_sz, n_segs, 0, true)) {
  81                         return -1;
  82                 }
  83
  84                 addr = mmap(NULL, mem_sz, PROT_READ | PROT_WRITE,
  85                                 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  86                 if (addr == MAP_FAILED) {
  87                         RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
  88                                         strerror(errno));
  89                         return -1;
  90                 }
  91
  92                 msl->base_va = addr;
  93                 msl->len = mem_sz;
  94
  95                 eal_memseg_list_populate(msl, addr, n_segs);
  96
  97                 return 0;
  98         }
  99
 100         /* map all hugepages and sort them */
 101         for (i = 0; i < internal_conf->num_hugepage_sizes; i++) {
 102                 struct hugepage_info *hpi;
 103                 rte_iova_t prev_end = 0;
 104                 int prev_ms_idx = -1;
 105                 uint64_t page_sz, mem_needed;
 106                 unsigned int n_pages, max_pages;
 107
 108                 hpi = &internal_conf->hugepage_info[i];
 109                 page_sz = hpi->hugepage_sz;
 110                 max_pages = hpi->num_pages[0];
 111                 mem_needed = RTE_ALIGN_CEIL(internal_conf->memory - total_mem,
 112                                 page_sz);
 113
 114                 n_pages = RTE_MIN(mem_needed / page_sz, max_pages);
 115
 116                 for (j = 0; j < n_pages; j++) {
 117                         struct rte_memseg_list *msl;
 118                         struct rte_fbarray *arr;
 119                         struct rte_memseg *seg;
 120                         int msl_idx, ms_idx;
 121                         rte_iova_t physaddr;
 122                         int error;
 123                         size_t sysctl_size = sizeof(physaddr);
 124                         char physaddr_str[64];
 125                         bool is_adjacent;
 126
 127                         /* first, check if this segment is IOVA-adjacent to
 128                          * the previous one.
 129                          */
 130                         snprintf(physaddr_str, sizeof(physaddr_str),
 131                                         "hw.contigmem.physaddr.%d", j);
 132                         error = sysctlbyname(physaddr_str, &physaddr,
 133                                         &sysctl_size, NULL, 0);
 134                         if (error < 0) {
 135                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 136                                                 "from %s\n", j, hpi->hugedir);
 137                                 return -1;
 138                         }
 139
 140                         is_adjacent = prev_end != 0 && physaddr == prev_end;
 141                         prev_end = physaddr + hpi->hugepage_sz;
 142
 143                         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
 144                                         msl_idx++) {
 145                                 bool empty, need_hole;
 146                                 msl = &mcfg->memsegs[msl_idx];
 147                                 arr = &msl->memseg_arr;
 148
 149                                 if (msl->page_sz != page_sz)
 150                                         continue;
 151
 152                                 empty = arr->count == 0;
 153
 154                                 /* we need a hole if this isn't an empty memseg
 155                                  * list, and if previous segment was not
 156                                  * adjacent to current one.
 157                                  */
 158                                 need_hole = !empty && !is_adjacent;
 159
 160                                 /* we need 1, plus hole if not adjacent */
 161                                 ms_idx = rte_fbarray_find_next_n_free(arr,
 162                                                 0, 1 + (need_hole ? 1 : 0));
 163
 164                                 /* memseg list is full? */
 165                                 if (ms_idx < 0)
 166                                         continue;
 167
 168                                 if (need_hole && prev_ms_idx == ms_idx - 1)
 169                                         ms_idx++;
 170                                 prev_ms_idx = ms_idx;
 171
 172                                 break;
 173                         }
 174                         if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
 175                                 RTE_LOG(ERR, EAL, "Could not find space for memseg. Please increase %s and/or %s in configuration.\n",
 176                                         RTE_STR(RTE_MAX_MEMSEG_PER_TYPE),
 177                                         RTE_STR(RTE_MAX_MEM_MB_PER_TYPE));
 178                                 return -1;
 179                         }
 180                         arr = &msl->memseg_arr;
 181                         seg = rte_fbarray_get(arr, ms_idx);
 182
 183                         addr = RTE_PTR_ADD(msl->base_va,
 184                                         (size_t)msl->page_sz * ms_idx);
 185
 186                         /* address is already mapped in memseg list, so using
 187                          * MAP_FIXED here is safe.
 188                          */
 189                         addr = mmap(addr, page_sz, PROT_READ|PROT_WRITE,
 190                                         MAP_SHARED | MAP_FIXED,
 191                                         hpi->lock_descriptor,
 192                                         j * EAL_PAGE_SIZE);
 193                         if (addr == MAP_FAILED) {
 194                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 195                                                 j, hpi->hugedir);
 196                                 return -1;
 197                         }
 198
 199                         seg->addr = addr;
 200                         seg->iova = physaddr;
 201                         seg->hugepage_sz = page_sz;
 202                         seg->len = page_sz;
 203                         seg->nchannel = mcfg->nchannel;
 204                         seg->nrank = mcfg->nrank;
 205                         seg->socket_id = 0;
 206
 207                         rte_fbarray_set_used(arr, ms_idx);
 208
 209                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 210                                         PRIx64", len %zu\n",
 211                                         seg_idx++, addr, physaddr, page_sz);
 212
 213                         total_mem += seg->len;
 214                 }
 215                 if (total_mem >= internal_conf->memory)
 216                         break;
 217         }
 218         if (total_mem < internal_conf->memory) {
 219                 RTE_LOG(ERR, EAL, "Couldn't reserve requested memory, "
 220                                 "requested: %" PRIu64 "M "
 221                                 "available: %" PRIu64 "M\n",
 222                                 internal_conf->memory >> 20, total_mem >> 20);
 223                 return -1;
 224         }
 225         return 0;
 226 }
 227
 228 struct attach_walk_args {
 229         int fd_hugepage;
 230         int seg_idx;
 231 };
 232 static int
 233 attach_segment(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
 234                 void *arg)
 235 {
 236         struct attach_walk_args *wa = arg;
 237         void *addr;
 238
 239         if (msl->external)
 240                 return 0;
 241
 242         addr = mmap(ms->addr, ms->len, PROT_READ | PROT_WRITE,
 243                         MAP_SHARED | MAP_FIXED, wa->fd_hugepage,
 244                         wa->seg_idx * EAL_PAGE_SIZE);
 245         if (addr == MAP_FAILED || addr != ms->addr)
 246                 return -1;
 247         wa->seg_idx++;
 248
 249         return 0;
 250 }
 251
 252 int
 253 rte_eal_hugepage_attach(void)
 254 {
 255         struct hugepage_info *hpi;
 256         int fd_hugepage = -1;
 257         unsigned int i;
 258         struct internal_config *internal_conf =
 259                 eal_get_internal_configuration();
 260
 261         hpi = &internal_conf->hugepage_info[0];
 262
 263         for (i = 0; i < internal_conf->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 static int
 323 memseg_list_alloc(struct rte_memseg_list *msl)
 324 {
 325         int flags = 0;
 326
 327 #ifdef RTE_ARCH_PPC_64
 328         flags |= EAL_RESERVE_HUGEPAGES;
 329 #endif
 330         return eal_memseg_list_alloc(msl, flags);
 331 }
 332
 333 static int
 334 memseg_primary_init(void)
 335 {
 336         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 337         int hpi_idx, msl_idx = 0;
 338         struct rte_memseg_list *msl;
 339         uint64_t max_mem, total_mem;
 340         struct internal_config *internal_conf =
 341                 eal_get_internal_configuration();
 342
 343         /* no-huge does not need this at all */
 344         if (internal_conf->no_hugetlbfs)
 345                 return 0;
 346
 347         /* FreeBSD has an issue where core dump will dump the entire memory
 348          * contents, including anonymous zero-page memory. Therefore, while we
 349          * will be limiting total amount of memory to RTE_MAX_MEM_MB, we will
 350          * also be further limiting total memory amount to whatever memory is
 351          * available to us through contigmem driver (plus spacing blocks).
 352          *
 353          * so, at each stage, we will be checking how much memory we are
 354          * preallocating, and adjust all the values accordingly.
 355          */
 356
 357         max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
 358         total_mem = 0;
 359
 360         /* create memseg lists */
 361         for (hpi_idx = 0; hpi_idx < (int) internal_conf->num_hugepage_sizes;
 362                         hpi_idx++) {
 363                 uint64_t max_type_mem, total_type_mem = 0;
 364                 uint64_t avail_mem;
 365                 int type_msl_idx, max_segs, avail_segs, total_segs = 0;
 366                 struct hugepage_info *hpi;
 367                 uint64_t hugepage_sz;
 368
 369                 hpi = &internal_conf->hugepage_info[hpi_idx];
 370                 hugepage_sz = hpi->hugepage_sz;
 371
 372                 /* no NUMA support on FreeBSD */
 373
 374                 /* check if we've already exceeded total memory amount */
 375                 if (total_mem >= max_mem)
 376                         break;
 377
 378                 /* first, calculate theoretical limits according to config */
 379                 max_type_mem = RTE_MIN(max_mem - total_mem,
 380                         (uint64_t)RTE_MAX_MEM_MB_PER_TYPE << 20);
 381                 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
 382
 383                 /* now, limit all of that to whatever will actually be
 384                  * available to us, because without dynamic allocation support,
 385                  * all of that extra memory will be sitting there being useless
 386                  * and slowing down core dumps in case of a crash.
 387                  *
 388                  * we need (N*2)-1 segments because we cannot guarantee that
 389                  * each segment will be IOVA-contiguous with the previous one,
 390                  * so we will allocate more and put spaces between segments
 391                  * that are non-contiguous.
 392                  */
 393                 avail_segs = (hpi->num_pages[0] * 2) - 1;
 394                 avail_mem = avail_segs * hugepage_sz;
 395
 396                 max_type_mem = RTE_MIN(avail_mem, max_type_mem);
 397                 max_segs = RTE_MIN(avail_segs, max_segs);
 398
 399                 type_msl_idx = 0;
 400                 while (total_type_mem < max_type_mem &&
 401                                 total_segs < max_segs) {
 402                         uint64_t cur_max_mem, cur_mem;
 403                         unsigned int n_segs;
 404
 405                         if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
 406                                 RTE_LOG(ERR, EAL,
 407                                         "No more space in memseg lists, please increase %s\n",
 408                                         RTE_STR(RTE_MAX_MEMSEG_LISTS));
 409                                 return -1;
 410                         }
 411
 412                         msl = &mcfg->memsegs[msl_idx++];
 413
 414                         cur_max_mem = max_type_mem - total_type_mem;
 415
 416                         cur_mem = get_mem_amount(hugepage_sz,
 417                                         cur_max_mem);
 418                         n_segs = cur_mem / hugepage_sz;
 419
 420                         if (eal_memseg_list_init(msl, hugepage_sz, n_segs,
 421                                         0, type_msl_idx, false))
 422                                 return -1;
 423
 424                         total_segs += msl->memseg_arr.len;
 425                         total_type_mem = total_segs * hugepage_sz;
 426                         type_msl_idx++;
 427
 428                         if (memseg_list_alloc(msl)) {
 429                                 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
 430                                 return -1;
 431                         }
 432                 }
 433                 total_mem += total_type_mem;
 434         }
 435         return 0;
 436 }
 437
 438 static int
 439 memseg_secondary_init(void)
 440 {
 441         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 442         int msl_idx = 0;
 443         struct rte_memseg_list *msl;
 444
 445         for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
 446
 447                 msl = &mcfg->memsegs[msl_idx];
 448
 449                 /* skip empty memseg lists */
 450                 if (msl->memseg_arr.len == 0)
 451                         continue;
 452
 453                 if (rte_fbarray_attach(&msl->memseg_arr)) {
 454                         RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
 455                         return -1;
 456                 }
 457
 458                 /* preallocate VA space */
 459                 if (memseg_list_alloc(msl)) {
 460                         RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
 461                         return -1;
 462                 }
 463         }
 464
 465         return 0;
 466 }
 467
 468 int
 469 rte_eal_memseg_init(void)
 470 {
 471         return rte_eal_process_type() == RTE_PROC_PRIMARY ?
 472                         memseg_primary_init() :
 473                         memseg_secondary_init();
 474 }