lib/librte_eal/windows/eal.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019 Intel Corporation
   3  */
   4
   5 #include <fcntl.h>
   6 #include <io.h>
   7 #include <share.h>
   8 #include <sys/stat.h>
   9
  10 #include <rte_debug.h>
  11 #include <rte_eal.h>
  12 #include <eal_memcfg.h>
  13 #include <rte_errno.h>
  14 #include <rte_lcore.h>
  15 #include <eal_thread.h>
  16 #include <eal_internal_cfg.h>
  17 #include <eal_filesystem.h>
  18 #include <eal_options.h>
  19 #include <eal_private.h>
  20
  21 #include "eal_windows.h"
  22
  23  /* Allow the application to print its usage message too if set */
  24 static rte_usage_hook_t rte_application_usage_hook;
  25
  26 /* define fd variable here, because file needs to be kept open for the
  27  * duration of the program, as we hold a write lock on it in the primary proc
  28  */
  29 static int mem_cfg_fd = -1;
  30
  31 /* early configuration structure, when memory config is not mmapped */
  32 static struct rte_mem_config early_mem_config;
  33
  34 /* Address of global and public configuration */
  35 static struct rte_config rte_config = {
  36                 .mem_config = &early_mem_config,
  37 };
  38
  39 /* internal configuration (per-core) */
  40 struct lcore_config lcore_config[RTE_MAX_LCORE];
  41
  42 /* internal configuration */
  43 struct internal_config internal_config;
  44
  45 /* platform-specific runtime dir */
  46 static char runtime_dir[PATH_MAX];
  47
  48 const char *
  49 rte_eal_get_runtime_dir(void)
  50 {
  51         return runtime_dir;
  52 }
  53
  54 /* Return a pointer to the configuration structure */
  55 struct rte_config *
  56 rte_eal_get_configuration(void)
  57 {
  58         return &rte_config;
  59 }
  60
  61 /* Detect if we are a primary or a secondary process */
  62 enum rte_proc_type_t
  63 eal_proc_type_detect(void)
  64 {
  65         enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
  66         const char *pathname = eal_runtime_config_path();
  67
  68         /* if we can open the file but not get a write-lock we are a secondary
  69          * process. NOTE: if we get a file handle back, we keep that open
  70          * and don't close it to prevent a race condition between multiple opens
  71          */
  72         errno_t err = _sopen_s(&mem_cfg_fd, pathname,
  73                 _O_RDWR, _SH_DENYNO, _S_IREAD | _S_IWRITE);
  74         if (err == 0) {
  75                 OVERLAPPED soverlapped = { 0 };
  76                 soverlapped.Offset = sizeof(*rte_config.mem_config);
  77                 soverlapped.OffsetHigh = 0;
  78
  79                 HANDLE hwinfilehandle = (HANDLE)_get_osfhandle(mem_cfg_fd);
  80
  81                 if (!LockFileEx(hwinfilehandle,
  82                         LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY, 0,
  83                         sizeof(*rte_config.mem_config), 0, &soverlapped))
  84                         ptype = RTE_PROC_SECONDARY;
  85         }
  86
  87         RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
  88                 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
  89
  90         return ptype;
  91 }
  92
  93 /* display usage */
  94 static void
  95 eal_usage(const char *prgname)
  96 {
  97         printf("\nUsage: %s ", prgname);
  98         eal_common_usage();
  99         /* Allow the application to print its usage message too
 100          * if hook is set
 101          */
 102         if (rte_application_usage_hook) {
 103                 printf("===== Application Usage =====\n\n");
 104                 rte_application_usage_hook(prgname);
 105         }
 106 }
 107
 108 /* Parse the arguments for --log-level only */
 109 static void
 110 eal_log_level_parse(int argc, char **argv)
 111 {
 112         int opt;
 113         char **argvopt;
 114         int option_index;
 115
 116         argvopt = argv;
 117
 118         eal_reset_internal_config(&internal_config);
 119
 120         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 121                 eal_long_options, &option_index)) != EOF) {
 122
 123                 int ret;
 124
 125                 /* getopt is not happy, stop right now */
 126                 if (opt == '?')
 127                         break;
 128
 129                 ret = (opt == OPT_LOG_LEVEL_NUM) ?
 130                         eal_parse_common_option(opt, optarg,
 131                                 &internal_config) : 0;
 132
 133                 /* common parser is not happy */
 134                 if (ret < 0)
 135                         break;
 136         }
 137
 138         optind = 0; /* reset getopt lib */
 139 }
 140
 141 /* Parse the argument given in the command line of the application */
 142 __attribute__((optnone)) static int
 143 eal_parse_args(int argc, char **argv)
 144 {
 145         int opt, ret;
 146         char **argvopt;
 147         int option_index;
 148         char *prgname = argv[0];
 149
 150         argvopt = argv;
 151
 152         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 153                 eal_long_options, &option_index)) != EOF) {
 154
 155                 int ret;
 156
 157                 /* getopt is not happy, stop right now */
 158                 if (opt == '?') {
 159                         eal_usage(prgname);
 160                         return -1;
 161                 }
 162
 163                 ret = eal_parse_common_option(opt, optarg, &internal_config);
 164                 /* common parser is not happy */
 165                 if (ret < 0) {
 166                         eal_usage(prgname);
 167                         return -1;
 168                 }
 169                 /* common parser handled this option */
 170                 if (ret == 0)
 171                         continue;
 172
 173                 switch (opt) {
 174                 case 'h':
 175                         eal_usage(prgname);
 176                         exit(EXIT_SUCCESS);
 177                 default:
 178                         if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
 179                                 RTE_LOG(ERR, EAL, "Option %c is not supported "
 180                                         "on Windows\n", opt);
 181                         } else if (opt >= OPT_LONG_MIN_NUM &&
 182                                 opt < OPT_LONG_MAX_NUM) {
 183                                 RTE_LOG(ERR, EAL, "Option %s is not supported "
 184                                         "on Windows\n",
 185                                         eal_long_options[option_index].name);
 186                         } else {
 187                                 RTE_LOG(ERR, EAL, "Option %d is not supported "
 188                                         "on Windows\n", opt);
 189                         }
 190                         eal_usage(prgname);
 191                         return -1;
 192                 }
 193         }
 194
 195         if (eal_adjust_config(&internal_config) != 0)
 196                 return -1;
 197
 198         /* sanity checks */
 199         if (eal_check_common_options(&internal_config) != 0) {
 200                 eal_usage(prgname);
 201                 return -1;
 202         }
 203
 204         if (optind >= 0)
 205                 argv[optind - 1] = prgname;
 206         ret = optind - 1;
 207         optind = 0; /* reset getopt lib */
 208         return ret;
 209 }
 210
 211 static int
 212 sync_func(void *arg __rte_unused)
 213 {
 214         return 0;
 215 }
 216
 217 static void
 218 rte_eal_init_alert(const char *msg)
 219 {
 220         fprintf(stderr, "EAL: FATAL: %s\n", msg);
 221         RTE_LOG(ERR, EAL, "%s\n", msg);
 222 }
 223
 224  /* Launch threads, called at application init(). */
 225 int
 226 rte_eal_init(int argc, char **argv)
 227 {
 228         int i, fctret;
 229
 230         eal_log_level_parse(argc, argv);
 231
 232         /* create a map of all processors in the system */
 233         eal_create_cpu_map();
 234
 235         if (rte_eal_cpu_init() < 0) {
 236                 rte_eal_init_alert("Cannot detect lcores.");
 237                 rte_errno = ENOTSUP;
 238                 return -1;
 239         }
 240
 241         fctret = eal_parse_args(argc, argv);
 242         if (fctret < 0)
 243                 exit(1);
 244
 245         eal_thread_init_master(rte_config.master_lcore);
 246
 247         RTE_LCORE_FOREACH_SLAVE(i) {
 248
 249                 /*
 250                  * create communication pipes between master thread
 251                  * and children
 252                  */
 253                 if (_pipe(lcore_config[i].pipe_master2slave,
 254                         sizeof(char), _O_BINARY) < 0)
 255                         rte_panic("Cannot create pipe\n");
 256                 if (_pipe(lcore_config[i].pipe_slave2master,
 257                         sizeof(char), _O_BINARY) < 0)
 258                         rte_panic("Cannot create pipe\n");
 259
 260                 lcore_config[i].state = WAIT;
 261
 262                 /* create a thread for each lcore */
 263                 if (eal_thread_create(&lcore_config[i].thread_id) != 0)
 264                         rte_panic("Cannot create thread\n");
 265         }
 266
 267         /*
 268          * Launch a dummy function on all slave lcores, so that master lcore
 269          * knows they are all ready when this function returns.
 270          */
 271         rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
 272         rte_eal_mp_wait_lcore();
 273         return fctret;
 274 }