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_virt2phy() when hugepages are disabled. */
  58         (void)virtaddr;
  59         return RTE_BAD_IOVA;
  60 }
  61
  62 int
  63 rte_eal_hugepage_init(void)
  64 {
  65         struct rte_mem_config *mcfg;
  66         uint64_t total_mem = 0;
  67         void *addr;
  68         unsigned i, j, seg_idx = 0;
  69
  70         /* get pointer to global configuration */
  71         mcfg = rte_eal_get_configuration()->mem_config;
  72
  73         /* for debug purposes, hugetlbfs can be disabled */
  74         if (internal_config.no_hugetlbfs) {
  75                 addr = malloc(internal_config.memory);
  76                 mcfg->memseg[0].iova = (rte_iova_t)(uintptr_t)addr;
  77                 mcfg->memseg[0].addr = addr;
  78                 mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
  79                 mcfg->memseg[0].len = internal_config.memory;
  80                 mcfg->memseg[0].socket_id = 0;
  81                 return 0;
  82         }
  83
  84         /* map all hugepages and sort them */
  85         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
  86                 struct hugepage_info *hpi;
  87
  88                 hpi = &internal_config.hugepage_info[i];
  89                 for (j = 0; j < hpi->num_pages[0]; j++) {
  90                         struct rte_memseg *seg;
  91                         rte_iova_t physaddr;
  92                         int error;
  93                         size_t sysctl_size = sizeof(physaddr);
  94                         char physaddr_str[64];
  95
  96                         addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
  97                                     MAP_SHARED, hpi->lock_descriptor,
  98                                     j * EAL_PAGE_SIZE);
  99                         if (addr == MAP_FAILED) {
 100                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 101                                                 j, hpi->hugedir);
 102                                 return -1;
 103                         }
 104
 105                         snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
 106                                         ".physaddr.%d", j);
 107                         error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
 108                                         NULL, 0);
 109                         if (error < 0) {
 110                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 111                                                 "from %s\n", j, hpi->hugedir);
 112                                 return -1;
 113                         }
 114
 115                         seg = &mcfg->memseg[seg_idx++];
 116                         seg->addr = addr;
 117                         seg->iova = physaddr;
 118                         seg->hugepage_sz = hpi->hugepage_sz;
 119                         seg->len = hpi->hugepage_sz;
 120                         seg->nchannel = mcfg->nchannel;
 121                         seg->nrank = mcfg->nrank;
 122                         seg->socket_id = 0;
 123
 124                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 125                                         PRIx64", len %zu\n",
 126                                         seg_idx, addr, physaddr, hpi->hugepage_sz);
 127                         if (total_mem >= internal_config.memory ||
 128                                         seg_idx >= RTE_MAX_MEMSEG)
 129                                 break;
 130                 }
 131         }
 132         return 0;
 133 }
 134
 135 int
 136 rte_eal_hugepage_attach(void)
 137 {
 138         const struct hugepage_info *hpi;
 139         int fd_hugepage_info, fd_hugepage = -1;
 140         unsigned i = 0;
 141         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 142
 143         /* Obtain a file descriptor for hugepage_info */
 144         fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
 145         if (fd_hugepage_info < 0) {
 146                 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
 147                 return -1;
 148         }
 149
 150         /* Map the shared hugepage_info into the process address spaces */
 151         hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
 152                         fd_hugepage_info, 0);
 153         if (hpi == NULL) {
 154                 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
 155                 goto error;
 156         }
 157
 158         /* Obtain a file descriptor for contiguous memory */
 159         fd_hugepage = open(hpi->hugedir, O_RDWR);
 160         if (fd_hugepage < 0) {
 161                 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
 162                 goto error;
 163         }
 164
 165         /* Map the contiguous memory into each memory segment */
 166         for (i = 0; i < hpi->num_pages[0]; i++) {
 167
 168                 void *addr;
 169                 struct rte_memseg *seg = &mcfg->memseg[i];
 170
 171                 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 172                             MAP_SHARED|MAP_FIXED, fd_hugepage,
 173                             i * EAL_PAGE_SIZE);
 174                 if (addr == MAP_FAILED || addr != seg->addr) {
 175                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 176                                 i, hpi->hugedir);
 177                         goto error;
 178                 }
 179
 180         }
 181
 182         /* hugepage_info is no longer required */
 183         munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
 184         close(fd_hugepage_info);
 185         close(fd_hugepage);
 186         return 0;
 187
 188 error:
 189         if (fd_hugepage_info >= 0)
 190                 close(fd_hugepage_info);
 191         if (fd_hugepage >= 0)
 192                 close(fd_hugepage);
 193         return -1;
 194 }
 195
 196 int
 197 rte_eal_using_phys_addrs(void)
 198 {
 199         return 0;
 200 }