lib/librte_eal/bsdapp/eal/eal_memory.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <sys/mman.h>
  34 #include <unistd.h>
  35 #include <sys/types.h>
  36 #include <sys/sysctl.h>
  37 #include <inttypes.h>
  38 #include <fcntl.h>
  39
  40 #include <rte_eal.h>
  41 #include <rte_eal_memconfig.h>
  42 #include <rte_log.h>
  43 #include <rte_string_fns.h>
  44 #include "eal_private.h"
  45 #include "eal_internal_cfg.h"
  46 #include "eal_filesystem.h"
  47
  48 #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
  49
  50 /*
  51  * Get physical address of any mapped virtual address in the current process.
  52  */
  53 phys_addr_t
  54 rte_mem_virt2phy(const void *virtaddr)
  55 {
  56         /* XXX not implemented. This function is only used by
  57          * rte_mempool_virt2iova() when hugepages are disabled. */
  58         (void)virtaddr;
  59         return RTE_BAD_IOVA;
  60 }
  61 rte_iova_t
  62 rte_mem_virt2iova(const void *virtaddr)
  63 {
  64         return rte_mem_virt2phy(virtaddr);
  65 }
  66
  67 int
  68 rte_eal_hugepage_init(void)
  69 {
  70         struct rte_mem_config *mcfg;
  71         uint64_t total_mem = 0;
  72         void *addr;
  73         unsigned i, j, seg_idx = 0;
  74
  75         /* get pointer to global configuration */
  76         mcfg = rte_eal_get_configuration()->mem_config;
  77
  78         /* for debug purposes, hugetlbfs can be disabled */
  79         if (internal_config.no_hugetlbfs) {
  80                 addr = malloc(internal_config.memory);
  81                 mcfg->memseg[0].iova = (rte_iova_t)(uintptr_t)addr;
  82                 mcfg->memseg[0].addr = addr;
  83                 mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
  84                 mcfg->memseg[0].len = internal_config.memory;
  85                 mcfg->memseg[0].socket_id = 0;
  86                 return 0;
  87         }
  88
  89         /* map all hugepages and sort them */
  90         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
  91                 struct hugepage_info *hpi;
  92
  93                 hpi = &internal_config.hugepage_info[i];
  94                 for (j = 0; j < hpi->num_pages[0]; j++) {
  95                         struct rte_memseg *seg;
  96                         rte_iova_t physaddr;
  97                         int error;
  98                         size_t sysctl_size = sizeof(physaddr);
  99                         char physaddr_str[64];
 100
 101                         addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 102                                     MAP_SHARED, hpi->lock_descriptor,
 103                                     j * EAL_PAGE_SIZE);
 104                         if (addr == MAP_FAILED) {
 105                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 106                                                 j, hpi->hugedir);
 107                                 return -1;
 108                         }
 109
 110                         snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
 111                                         ".physaddr.%d", j);
 112                         error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
 113                                         NULL, 0);
 114                         if (error < 0) {
 115                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 116                                                 "from %s\n", j, hpi->hugedir);
 117                                 return -1;
 118                         }
 119
 120                         seg = &mcfg->memseg[seg_idx++];
 121                         seg->addr = addr;
 122                         seg->iova = physaddr;
 123                         seg->hugepage_sz = hpi->hugepage_sz;
 124                         seg->len = hpi->hugepage_sz;
 125                         seg->nchannel = mcfg->nchannel;
 126                         seg->nrank = mcfg->nrank;
 127                         seg->socket_id = 0;
 128
 129                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 130                                         PRIx64", len %zu\n",
 131                                         seg_idx, addr, physaddr, hpi->hugepage_sz);
 132                         if (total_mem >= internal_config.memory ||
 133                                         seg_idx >= RTE_MAX_MEMSEG)
 134                                 break;
 135                 }
 136         }
 137         return 0;
 138 }
 139
 140 int
 141 rte_eal_hugepage_attach(void)
 142 {
 143         const struct hugepage_info *hpi;
 144         int fd_hugepage_info, fd_hugepage = -1;
 145         unsigned i = 0;
 146         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 147
 148         /* Obtain a file descriptor for hugepage_info */
 149         fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
 150         if (fd_hugepage_info < 0) {
 151                 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
 152                 return -1;
 153         }
 154
 155         /* Map the shared hugepage_info into the process address spaces */
 156         hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
 157                         fd_hugepage_info, 0);
 158         if (hpi == NULL) {
 159                 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
 160                 goto error;
 161         }
 162
 163         /* Obtain a file descriptor for contiguous memory */
 164         fd_hugepage = open(hpi->hugedir, O_RDWR);
 165         if (fd_hugepage < 0) {
 166                 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
 167                 goto error;
 168         }
 169
 170         /* Map the contiguous memory into each memory segment */
 171         for (i = 0; i < hpi->num_pages[0]; i++) {
 172
 173                 void *addr;
 174                 struct rte_memseg *seg = &mcfg->memseg[i];
 175
 176                 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 177                             MAP_SHARED|MAP_FIXED, fd_hugepage,
 178                             i * EAL_PAGE_SIZE);
 179                 if (addr == MAP_FAILED || addr != seg->addr) {
 180                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 181                                 i, hpi->hugedir);
 182                         goto error;
 183                 }
 184
 185         }
 186
 187         /* hugepage_info is no longer required */
 188         munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
 189         close(fd_hugepage_info);
 190         close(fd_hugepage);
 191         return 0;
 192
 193 error:
 194         if (fd_hugepage_info >= 0)
 195                 close(fd_hugepage_info);
 196         if (fd_hugepage >= 0)
 197                 close(fd_hugepage);
 198         return -1;
 199 }
 200
 201 int
 202 rte_eal_using_phys_addrs(void)
 203 {
 204         return 0;
 205 }