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 <fcntl.h>
  10
  11 #include <rte_eal.h>
  12 #include <rte_eal_memconfig.h>
  13 #include <rte_log.h>
  14 #include <rte_string_fns.h>
  15 #include "eal_private.h"
  16 #include "eal_internal_cfg.h"
  17 #include "eal_filesystem.h"
  18
  19 #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
  20
  21 /*
  22  * Get physical address of any mapped virtual address in the current process.
  23  */
  24 phys_addr_t
  25 rte_mem_virt2phy(const void *virtaddr)
  26 {
  27         /* XXX not implemented. This function is only used by
  28          * rte_mempool_virt2iova() when hugepages are disabled. */
  29         (void)virtaddr;
  30         return RTE_BAD_IOVA;
  31 }
  32 rte_iova_t
  33 rte_mem_virt2iova(const void *virtaddr)
  34 {
  35         return rte_mem_virt2phy(virtaddr);
  36 }
  37
  38 int
  39 rte_eal_hugepage_init(void)
  40 {
  41         struct rte_mem_config *mcfg;
  42         uint64_t total_mem = 0;
  43         void *addr;
  44         unsigned i, j, seg_idx = 0;
  45
  46         /* get pointer to global configuration */
  47         mcfg = rte_eal_get_configuration()->mem_config;
  48
  49         /* for debug purposes, hugetlbfs can be disabled */
  50         if (internal_config.no_hugetlbfs) {
  51                 addr = malloc(internal_config.memory);
  52                 mcfg->memseg[0].iova = (rte_iova_t)(uintptr_t)addr;
  53                 mcfg->memseg[0].addr = addr;
  54                 mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
  55                 mcfg->memseg[0].len = internal_config.memory;
  56                 mcfg->memseg[0].socket_id = 0;
  57                 return 0;
  58         }
  59
  60         /* map all hugepages and sort them */
  61         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
  62                 struct hugepage_info *hpi;
  63
  64                 hpi = &internal_config.hugepage_info[i];
  65                 for (j = 0; j < hpi->num_pages[0]; j++) {
  66                         struct rte_memseg *seg;
  67                         rte_iova_t physaddr;
  68                         int error;
  69                         size_t sysctl_size = sizeof(physaddr);
  70                         char physaddr_str[64];
  71
  72                         addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
  73                                     MAP_SHARED, hpi->lock_descriptor,
  74                                     j * EAL_PAGE_SIZE);
  75                         if (addr == MAP_FAILED) {
  76                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
  77                                                 j, hpi->hugedir);
  78                                 return -1;
  79                         }
  80
  81                         snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
  82                                         ".physaddr.%d", j);
  83                         error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
  84                                         NULL, 0);
  85                         if (error < 0) {
  86                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
  87                                                 "from %s\n", j, hpi->hugedir);
  88                                 return -1;
  89                         }
  90
  91                         seg = &mcfg->memseg[seg_idx++];
  92                         seg->addr = addr;
  93                         seg->iova = physaddr;
  94                         seg->hugepage_sz = hpi->hugepage_sz;
  95                         seg->len = hpi->hugepage_sz;
  96                         seg->nchannel = mcfg->nchannel;
  97                         seg->nrank = mcfg->nrank;
  98                         seg->socket_id = 0;
  99
 100                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 101                                         PRIx64", len %zu\n",
 102                                         seg_idx, addr, physaddr, hpi->hugepage_sz);
 103                         if (total_mem >= internal_config.memory ||
 104                                         seg_idx >= RTE_MAX_MEMSEG)
 105                                 break;
 106                 }
 107         }
 108         return 0;
 109 }
 110
 111 int
 112 rte_eal_hugepage_attach(void)
 113 {
 114         const struct hugepage_info *hpi;
 115         int fd_hugepage_info, fd_hugepage = -1;
 116         unsigned i = 0;
 117         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 118
 119         /* Obtain a file descriptor for hugepage_info */
 120         fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
 121         if (fd_hugepage_info < 0) {
 122                 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
 123                 return -1;
 124         }
 125
 126         /* Map the shared hugepage_info into the process address spaces */
 127         hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
 128                         fd_hugepage_info, 0);
 129         if (hpi == MAP_FAILED) {
 130                 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
 131                 goto error;
 132         }
 133
 134         /* Obtain a file descriptor for contiguous memory */
 135         fd_hugepage = open(hpi->hugedir, O_RDWR);
 136         if (fd_hugepage < 0) {
 137                 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
 138                 goto error;
 139         }
 140
 141         /* Map the contiguous memory into each memory segment */
 142         for (i = 0; i < hpi->num_pages[0]; i++) {
 143
 144                 void *addr;
 145                 struct rte_memseg *seg = &mcfg->memseg[i];
 146
 147                 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 148                             MAP_SHARED|MAP_FIXED, fd_hugepage,
 149                             i * EAL_PAGE_SIZE);
 150                 if (addr == MAP_FAILED || addr != seg->addr) {
 151                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 152                                 i, hpi->hugedir);
 153                         goto error;
 154                 }
 155
 156         }
 157
 158         /* hugepage_info is no longer required */
 159         munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
 160         close(fd_hugepage_info);
 161         close(fd_hugepage);
 162         return 0;
 163
 164 error:
 165         if (fd_hugepage_info >= 0)
 166                 close(fd_hugepage_info);
 167         if (fd_hugepage >= 0)
 168                 close(fd_hugepage);
 169         return -1;
 170 }
 171
 172 int
 173 rte_eal_using_phys_addrs(void)
 174 {
 175         return 0;
 176 }