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 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_PHYS_ADDR;
  60 }
  61
  62 static int
  63 rte_eal_contigmem_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].phys_addr = (phys_addr_t)(uintptr_t)addr;
  77                 mcfg->memseg[0].addr = addr;
  78                 mcfg->memseg[0].len = internal_config.memory;
  79                 mcfg->memseg[0].socket_id = 0;
  80                 return 0;
  81         }
  82
  83         /* map all hugepages and sort them */
  84         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
  85                 struct hugepage_info *hpi;
  86
  87                 hpi = &internal_config.hugepage_info[i];
  88                 for (j = 0; j < hpi->num_pages[0]; j++) {
  89                         struct rte_memseg *seg;
  90                         uint64_t physaddr;
  91                         int error;
  92                         size_t sysctl_size = sizeof(physaddr);
  93                         char physaddr_str[64];
  94
  95                         addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
  96                                         MAP_SHARED, hpi->lock_descriptor, j * PAGE_SIZE);
  97                         if (addr == MAP_FAILED) {
  98                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
  99                                                 j, hpi->hugedir);
 100                                 return -1;
 101                         }
 102
 103                         rte_snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
 104                                         ".physaddr.%d", j);
 105                         error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
 106                                         NULL, 0);
 107                         if (error < 0) {
 108                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
 109                                                 "from %s\n", j, hpi->hugedir);
 110                                 return -1;
 111                         }
 112
 113                         seg = &mcfg->memseg[seg_idx++];
 114                         seg->addr = addr;
 115                         seg->phys_addr = physaddr;
 116                         seg->hugepage_sz = hpi->hugepage_sz;
 117                         seg->len = hpi->hugepage_sz;
 118                         seg->nchannel = mcfg->nchannel;
 119                         seg->nrank = mcfg->nrank;
 120                         seg->socket_id = 0;
 121
 122                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 123                                         PRIx64", len %zu\n",
 124                                         seg_idx, addr, physaddr, hpi->hugepage_sz);
 125                         if (total_mem >= internal_config.memory ||
 126                                         seg_idx >= RTE_MAX_MEMSEG)
 127                                 break;
 128                 }
 129         }
 130         return 0;
 131 }
 132
 133 static int
 134 rte_eal_contigmem_attach(void)
 135 {
 136         const struct hugepage_info *hpi;
 137         int fd_hugepage_info, fd_hugepage = -1;
 138         unsigned i = 0;
 139         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 140
 141         /* Obtain a file descriptor for hugepage_info */
 142         fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
 143         if (fd_hugepage_info < 0) {
 144                 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
 145                 return -1;
 146         }
 147
 148         /* Map the shared hugepage_info into the process address spaces */
 149         hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
 150                         fd_hugepage_info, 0);
 151         if (hpi == NULL) {
 152                 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
 153                 goto error;
 154         }
 155
 156         /* Obtain a file descriptor for contiguous memory */
 157         fd_hugepage = open(hpi->hugedir, O_RDWR);
 158         if (fd_hugepage < 0) {
 159                 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
 160                 goto error;
 161         }
 162
 163         /* Map the contiguous memory into each memory segment */
 164         for (i = 0; i < hpi->num_pages[0]; i++) {
 165
 166                 void *addr;
 167                 struct rte_memseg *seg = &mcfg->memseg[i];
 168
 169                 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 170                                 MAP_SHARED|MAP_FIXED, fd_hugepage, i * PAGE_SIZE);
 171                 if (addr == MAP_FAILED || addr != seg->addr) {
 172                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 173                                 i, hpi->hugedir);
 174                         goto error;
 175                 }
 176
 177         }
 178
 179         /* hugepage_info is no longer required */
 180         munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
 181         close(fd_hugepage_info);
 182         close(fd_hugepage);
 183         return 0;
 184
 185 error:
 186         if (fd_hugepage_info >= 0)
 187                 close(fd_hugepage_info);
 188         if (fd_hugepage >= 0)
 189                 close(fd_hugepage);
 190         return -1;
 191 }
 192
 193
 194 static int
 195 rte_eal_memdevice_init(void)
 196 {
 197         struct rte_config *config;
 198
 199         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
 200                 return 0;
 201
 202         config = rte_eal_get_configuration();
 203         config->mem_config->nchannel = internal_config.force_nchannel;
 204         config->mem_config->nrank = internal_config.force_nrank;
 205
 206         return 0;
 207 }
 208
 209 /* init memory subsystem */
 210 int
 211 rte_eal_memory_init(void)
 212 {
 213         RTE_LOG(INFO, EAL, "Setting up physically contiguous memory...\n");
 214         const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
 215                         rte_eal_contigmem_init() :
 216                         rte_eal_contigmem_attach();
 217         if (retval < 0)
 218                 return -1;
 219
 220         if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)
 221                 return -1;
 222
 223         return 0;
 224 }