1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation.
3 * Copyright(c) 2012-2014 6WIND S.A.
23 #include <sys/queue.h>
25 #if defined(RTE_ARCH_X86)
29 #include <rte_compat.h>
30 #include <rte_common.h>
31 #include <rte_debug.h>
32 #include <rte_memory.h>
33 #include <rte_launch.h>
35 #include <rte_eal_memconfig.h>
36 #include <rte_errno.h>
37 #include <rte_per_lcore.h>
38 #include <rte_lcore.h>
39 #include <rte_service_component.h>
41 #include <rte_random.h>
42 #include <rte_cycles.h>
43 #include <rte_string_fns.h>
44 #include <rte_cpuflags.h>
45 #include <rte_interrupts.h>
48 #include <rte_devargs.h>
49 #include <rte_version.h>
50 #include <rte_atomic.h>
51 #include <malloc_heap.h>
53 #include <rte_option.h>
55 #include "eal_private.h"
56 #include "eal_thread.h"
57 #include "eal_internal_cfg.h"
58 #include "eal_filesystem.h"
59 #include "eal_hugepages.h"
60 #include "eal_options.h"
63 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
65 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
67 /* Allow the application to print its usage message too if set */
68 static rte_usage_hook_t rte_application_usage_hook = NULL;
70 /* early configuration structure, when memory config is not mmapped */
71 static struct rte_mem_config early_mem_config;
73 /* define fd variable here, because file needs to be kept open for the
74 * duration of the program, as we hold a write lock on it in the primary proc */
75 static int mem_cfg_fd = -1;
77 static struct flock wr_lock = {
80 .l_start = offsetof(struct rte_mem_config, memsegs),
81 .l_len = sizeof(early_mem_config.memsegs),
84 /* Address of global and public configuration */
85 static struct rte_config rte_config = {
86 .mem_config = &early_mem_config,
89 /* internal configuration (per-core) */
90 struct lcore_config lcore_config[RTE_MAX_LCORE];
92 /* internal configuration */
93 struct internal_config internal_config;
95 /* used by rte_rdtsc() */
96 int rte_cycles_vmware_tsc_map;
98 /* platform-specific runtime dir */
99 static char runtime_dir[PATH_MAX];
101 static const char *default_runtime_dir = "/var/run";
104 eal_create_runtime_dir(void)
106 const char *directory = default_runtime_dir;
107 const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR");
108 const char *fallback = "/tmp";
113 /* try XDG path first, fall back to /tmp */
114 if (xdg_runtime_dir != NULL)
115 directory = xdg_runtime_dir;
117 directory = fallback;
119 /* create DPDK subdirectory under runtime dir */
120 ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory);
121 if (ret < 0 || ret == sizeof(tmp)) {
122 RTE_LOG(ERR, EAL, "Error creating DPDK runtime path name\n");
126 /* create prefix-specific subdirectory under DPDK runtime dir */
127 ret = snprintf(runtime_dir, sizeof(runtime_dir), "%s/%s",
128 tmp, eal_get_hugefile_prefix());
129 if (ret < 0 || ret == sizeof(runtime_dir)) {
130 RTE_LOG(ERR, EAL, "Error creating prefix-specific runtime path name\n");
134 /* create the path if it doesn't exist. no "mkdir -p" here, so do it
137 ret = mkdir(tmp, 0700);
138 if (ret < 0 && errno != EEXIST) {
139 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
140 tmp, strerror(errno));
144 ret = mkdir(runtime_dir, 0700);
145 if (ret < 0 && errno != EEXIST) {
146 RTE_LOG(ERR, EAL, "Error creating '%s': %s\n",
147 runtime_dir, strerror(errno));
155 eal_clean_runtime_dir(void)
158 struct dirent *dirent;
159 int dir_fd, fd, lck_result;
160 static const char * const filters[] = {
166 dir = opendir(runtime_dir);
168 RTE_LOG(ERR, EAL, "Unable to open runtime directory %s\n",
174 /* lock the directory before doing anything, to avoid races */
175 if (flock(dir_fd, LOCK_EX) < 0) {
176 RTE_LOG(ERR, EAL, "Unable to lock runtime directory %s\n",
181 dirent = readdir(dir);
183 RTE_LOG(ERR, EAL, "Unable to read runtime directory %s\n",
188 while (dirent != NULL) {
192 /* skip files that don't match the patterns */
193 for (f_idx = 0; f_idx < RTE_DIM(filters); f_idx++) {
194 const char *filter = filters[f_idx];
196 if (fnmatch(filter, dirent->d_name, 0) == 0) {
202 dirent = readdir(dir);
206 /* try and lock the file */
207 fd = openat(dir_fd, dirent->d_name, O_RDONLY);
209 /* skip to next file */
211 dirent = readdir(dir);
215 /* non-blocking lock */
216 lck_result = flock(fd, LOCK_EX | LOCK_NB);
218 /* if lock succeeds, remove the file */
219 if (lck_result != -1)
220 unlinkat(dir_fd, dirent->d_name, 0);
222 dirent = readdir(dir);
225 /* closedir closes dir_fd and drops the lock */
233 RTE_LOG(ERR, EAL, "Error while clearing runtime dir: %s\n",
240 rte_eal_get_runtime_dir(void)
245 /* Return user provided mbuf pool ops name */
247 rte_eal_mbuf_user_pool_ops(void)
249 return internal_config.user_mbuf_pool_ops_name;
252 /* Return a pointer to the configuration structure */
254 rte_eal_get_configuration(void)
260 rte_eal_iova_mode(void)
262 return rte_eal_get_configuration()->iova_mode;
265 /* parse a sysfs (or other) file containing one integer value */
267 eal_parse_sysfs_value(const char *filename, unsigned long *val)
273 if ((f = fopen(filename, "r")) == NULL) {
274 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
279 if (fgets(buf, sizeof(buf), f) == NULL) {
280 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
285 *val = strtoul(buf, &end, 0);
286 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
287 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
297 /* create memory configuration in shared/mmap memory. Take out
298 * a write lock on the memsegs, so we can auto-detect primary/secondary.
299 * This means we never close the file while running (auto-close on exit).
300 * We also don't lock the whole file, so that in future we can use read-locks
301 * on other parts, e.g. memzones, to detect if there are running secondary
304 rte_eal_config_create(void)
306 void *rte_mem_cfg_addr;
309 const char *pathname = eal_runtime_config_path();
311 if (internal_config.no_shconf)
314 /* map the config before hugepage address so that we don't waste a page */
315 if (internal_config.base_virtaddr != 0)
316 rte_mem_cfg_addr = (void *)
317 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
318 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
320 rte_mem_cfg_addr = NULL;
323 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
324 if (mem_cfg_fd < 0) {
325 RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
331 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
335 RTE_LOG(ERR, EAL, "Cannot resize '%s' for rte_mem_config\n",
340 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
344 RTE_LOG(ERR, EAL, "Cannot create lock on '%s'. Is another primary "
345 "process running?\n", pathname);
349 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
350 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
352 if (rte_mem_cfg_addr == MAP_FAILED){
355 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config\n");
359 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
360 rte_config.mem_config = rte_mem_cfg_addr;
362 /* store address of the config in the config itself so that secondary
363 * processes could later map the config into this exact location */
364 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
366 rte_config.mem_config->dma_maskbits = 0;
371 /* attach to an existing shared memory config */
373 rte_eal_config_attach(void)
375 struct rte_mem_config *mem_config;
377 const char *pathname = eal_runtime_config_path();
379 if (internal_config.no_shconf)
383 mem_cfg_fd = open(pathname, O_RDWR);
384 if (mem_cfg_fd < 0) {
385 RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
391 /* map it as read-only first */
392 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
393 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
394 if (mem_config == MAP_FAILED) {
397 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
398 errno, strerror(errno));
402 rte_config.mem_config = mem_config;
407 /* reattach the shared config at exact memory location primary process has it */
409 rte_eal_config_reattach(void)
411 struct rte_mem_config *mem_config;
412 void *rte_mem_cfg_addr;
414 if (internal_config.no_shconf)
417 /* save the address primary process has mapped shared config to */
418 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
420 /* unmap original config */
421 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
423 /* remap the config at proper address */
424 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
425 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
431 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
432 if (mem_config != MAP_FAILED) {
433 /* errno is stale, don't use */
434 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]"
435 " - please use '--base-virtaddr' option\n",
436 rte_mem_cfg_addr, mem_config);
439 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
440 errno, strerror(errno));
444 rte_config.mem_config = mem_config;
449 /* Detect if we are a primary or a secondary process */
451 eal_proc_type_detect(void)
453 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
454 const char *pathname = eal_runtime_config_path();
456 /* if there no shared config, there can be no secondary processes */
457 if (!internal_config.no_shconf) {
458 /* if we can open the file but not get a write-lock we are a
459 * secondary process. NOTE: if we get a file handle back, we
460 * keep that open and don't close it to prevent a race condition
461 * between multiple opens.
463 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
464 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
465 ptype = RTE_PROC_SECONDARY;
468 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
469 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
474 /* copies data from internal config to shared config */
476 eal_update_mem_config(void)
478 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
479 mcfg->legacy_mem = internal_config.legacy_mem;
480 mcfg->single_file_segments = internal_config.single_file_segments;
483 /* copies data from shared config to internal config */
485 eal_update_internal_config(void)
487 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
488 internal_config.legacy_mem = mcfg->legacy_mem;
489 internal_config.single_file_segments = mcfg->single_file_segments;
492 /* Sets up rte_config structure with the pointer to shared memory config.*/
494 rte_config_init(void)
496 rte_config.process_type = internal_config.process_type;
498 switch (rte_config.process_type){
499 case RTE_PROC_PRIMARY:
500 if (rte_eal_config_create() < 0)
502 eal_update_mem_config();
504 case RTE_PROC_SECONDARY:
505 if (rte_eal_config_attach() < 0)
507 rte_eal_mcfg_wait_complete(rte_config.mem_config);
508 if (rte_eal_config_reattach() < 0)
510 eal_update_internal_config();
513 case RTE_PROC_INVALID:
514 RTE_LOG(ERR, EAL, "Invalid process type %d\n",
515 rte_config.process_type);
522 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
524 eal_hugedirs_unlock(void)
528 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
530 /* skip uninitialized */
531 if (internal_config.hugepage_info[i].lock_descriptor < 0)
533 /* unlock hugepage file */
534 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
535 close(internal_config.hugepage_info[i].lock_descriptor);
536 /* reset the field */
537 internal_config.hugepage_info[i].lock_descriptor = -1;
543 eal_usage(const char *prgname)
545 printf("\nUsage: %s ", prgname);
547 printf("EAL Linux options:\n"
548 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
549 " --"OPT_SOCKET_LIMIT" Limit memory allocation on sockets (comma separated values)\n"
550 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
551 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
552 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
553 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
554 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
555 " --"OPT_LEGACY_MEM" Legacy memory mode (no dynamic allocation, contiguous segments)\n"
556 " --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in single files\n"
557 " --"OPT_MATCH_ALLOCATIONS" Free hugepages exactly as allocated\n"
559 /* Allow the application to print its usage message too if hook is set */
560 if ( rte_application_usage_hook ) {
561 printf("===== Application Usage =====\n\n");
562 rte_application_usage_hook(prgname);
566 /* Set a per-application usage message */
568 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
570 rte_usage_hook_t old_func;
572 /* Will be NULL on the first call to denote the last usage routine. */
573 old_func = rte_application_usage_hook;
574 rte_application_usage_hook = usage_func;
580 eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
582 char * arg[RTE_MAX_NUMA_NODES];
585 uint64_t total_mem = 0;
587 len = strnlen(strval, SOCKET_MEM_STRLEN);
588 if (len == SOCKET_MEM_STRLEN) {
589 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
593 /* all other error cases will be caught later */
594 if (!isdigit(strval[len-1]))
597 /* split the optarg into separate socket values */
598 arg_num = rte_strsplit(strval, len,
599 arg, RTE_MAX_NUMA_NODES, ',');
601 /* if split failed, or 0 arguments */
605 /* parse each defined socket option */
607 for (i = 0; i < arg_num; i++) {
610 val = strtoull(arg[i], &end, 10);
612 /* check for invalid input */
614 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
625 eal_parse_base_virtaddr(const char *arg)
631 addr = strtoull(arg, &end, 16);
633 /* check for errors */
634 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
637 /* make sure we don't exceed 32-bit boundary on 32-bit target */
639 if (addr >= UINTPTR_MAX)
643 /* align the addr on 16M boundary, 16MB is the minimum huge page
644 * size on IBM Power architecture. If the addr is aligned to 16MB,
645 * it can align to 2MB for x86. So this alignment can also be used
647 internal_config.base_virtaddr =
648 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
654 eal_parse_vfio_intr(const char *mode)
659 enum rte_intr_mode value;
661 { "legacy", RTE_INTR_MODE_LEGACY },
662 { "msi", RTE_INTR_MODE_MSI },
663 { "msix", RTE_INTR_MODE_MSIX },
666 for (i = 0; i < RTE_DIM(map); i++) {
667 if (!strcmp(mode, map[i].name)) {
668 internal_config.vfio_intr_mode = map[i].value;
675 /* Parse the arguments for --log-level only */
677 eal_log_level_parse(int argc, char **argv)
682 const int old_optind = optind;
683 const int old_optopt = optopt;
684 char * const old_optarg = optarg;
689 while ((opt = getopt_long(argc, argvopt, eal_short_options,
690 eal_long_options, &option_index)) != EOF) {
694 /* getopt is not happy, stop right now */
698 ret = (opt == OPT_LOG_LEVEL_NUM) ?
699 eal_parse_common_option(opt, optarg, &internal_config) : 0;
701 /* common parser is not happy */
706 /* restore getopt lib */
712 /* Parse the argument given in the command line of the application */
714 eal_parse_args(int argc, char **argv)
719 char *prgname = argv[0];
720 const int old_optind = optind;
721 const int old_optopt = optopt;
722 char * const old_optarg = optarg;
728 while ((opt = getopt_long(argc, argvopt, eal_short_options,
729 eal_long_options, &option_index)) != EOF) {
732 * getopt didn't recognise the option, lets parse the
733 * registered options to see if the flag is valid
736 ret = rte_option_parse(argv[optind-1]);
745 ret = eal_parse_common_option(opt, optarg, &internal_config);
746 /* common parser is not happy */
752 /* common parser handled this option */
761 case OPT_HUGE_DIR_NUM:
763 char *hdir = strdup(optarg);
765 RTE_LOG(ERR, EAL, "Could not store hugepage directory\n");
767 /* free old hugepage dir */
768 if (internal_config.hugepage_dir != NULL)
769 free(internal_config.hugepage_dir);
770 internal_config.hugepage_dir = hdir;
774 case OPT_FILE_PREFIX_NUM:
776 char *prefix = strdup(optarg);
778 RTE_LOG(ERR, EAL, "Could not store file prefix\n");
780 /* free old prefix */
781 if (internal_config.hugefile_prefix != NULL)
782 free(internal_config.hugefile_prefix);
783 internal_config.hugefile_prefix = prefix;
787 case OPT_SOCKET_MEM_NUM:
788 if (eal_parse_socket_arg(optarg,
789 internal_config.socket_mem) < 0) {
790 RTE_LOG(ERR, EAL, "invalid parameters for --"
791 OPT_SOCKET_MEM "\n");
796 internal_config.force_sockets = 1;
799 case OPT_SOCKET_LIMIT_NUM:
800 if (eal_parse_socket_arg(optarg,
801 internal_config.socket_limit) < 0) {
802 RTE_LOG(ERR, EAL, "invalid parameters for --"
803 OPT_SOCKET_LIMIT "\n");
808 internal_config.force_socket_limits = 1;
811 case OPT_BASE_VIRTADDR_NUM:
812 if (eal_parse_base_virtaddr(optarg) < 0) {
813 RTE_LOG(ERR, EAL, "invalid parameter for --"
814 OPT_BASE_VIRTADDR "\n");
821 case OPT_VFIO_INTR_NUM:
822 if (eal_parse_vfio_intr(optarg) < 0) {
823 RTE_LOG(ERR, EAL, "invalid parameters for --"
831 case OPT_CREATE_UIO_DEV_NUM:
832 internal_config.create_uio_dev = 1;
835 case OPT_MBUF_POOL_OPS_NAME_NUM:
837 char *ops_name = strdup(optarg);
838 if (ops_name == NULL)
839 RTE_LOG(ERR, EAL, "Could not store mbuf pool ops name\n");
841 /* free old ops name */
842 if (internal_config.user_mbuf_pool_ops_name !=
844 free(internal_config.user_mbuf_pool_ops_name);
846 internal_config.user_mbuf_pool_ops_name =
851 case OPT_MATCH_ALLOCATIONS_NUM:
852 internal_config.match_allocations = 1;
856 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
857 RTE_LOG(ERR, EAL, "Option %c is not supported "
859 } else if (opt >= OPT_LONG_MIN_NUM &&
860 opt < OPT_LONG_MAX_NUM) {
861 RTE_LOG(ERR, EAL, "Option %s is not supported "
863 eal_long_options[option_index].name);
865 RTE_LOG(ERR, EAL, "Option %d is not supported "
874 /* create runtime data directory */
875 if (internal_config.no_shconf == 0 &&
876 eal_create_runtime_dir() < 0) {
877 RTE_LOG(ERR, EAL, "Cannot create runtime directory\n");
882 if (eal_adjust_config(&internal_config) != 0) {
888 if (eal_check_common_options(&internal_config) != 0) {
895 argv[optind-1] = prgname;
899 /* restore getopt lib */
908 check_socket(const struct rte_memseg_list *msl, void *arg)
910 int *socket_id = arg;
915 return *socket_id == msl->socket_id;
919 eal_check_mem_on_local_socket(void)
923 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
925 if (rte_memseg_list_walk(check_socket, &socket_id) == 0)
926 RTE_LOG(WARNING, EAL, "WARNING: Master core has no memory on local socket!\n");
930 sync_func(__attribute__((unused)) void *arg)
936 rte_eal_mcfg_complete(void)
938 /* ALL shared mem_config related INIT DONE */
939 if (rte_config.process_type == RTE_PROC_PRIMARY)
940 rte_config.mem_config->magic = RTE_MAGIC;
942 internal_config.init_complete = 1;
946 * Request iopl privilege for all RPL, returns 0 on success
947 * iopl() call is mostly for the i386 architecture. For other architectures,
948 * return -1 to indicate IO privilege can't be changed in this way.
951 rte_eal_iopl_init(void)
953 #if defined(RTE_ARCH_X86)
961 static int rte_eal_vfio_setup(void)
963 if (rte_vfio_enable("vfio"))
970 static void rte_eal_init_alert(const char *msg)
972 fprintf(stderr, "EAL: FATAL: %s\n", msg);
973 RTE_LOG(ERR, EAL, "%s\n", msg);
976 /* Launch threads, called at application init(). */
978 rte_eal_init(int argc, char **argv)
982 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
984 static char logid[PATH_MAX];
985 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
986 char thread_name[RTE_MAX_THREAD_NAME_LEN];
988 /* checks if the machine is adequate */
989 if (!rte_cpu_is_supported()) {
990 rte_eal_init_alert("unsupported cpu type.");
995 if (!rte_atomic32_test_and_set(&run_once)) {
996 rte_eal_init_alert("already called initialization.");
997 rte_errno = EALREADY;
1001 p = strrchr(argv[0], '/');
1002 strlcpy(logid, p ? p + 1 : argv[0], sizeof(logid));
1003 thread_id = pthread_self();
1005 eal_reset_internal_config(&internal_config);
1007 /* set log level as early as possible */
1008 eal_log_level_parse(argc, argv);
1010 if (rte_eal_cpu_init() < 0) {
1011 rte_eal_init_alert("Cannot detect lcores.");
1012 rte_errno = ENOTSUP;
1016 fctret = eal_parse_args(argc, argv);
1018 rte_eal_init_alert("Invalid 'command line' arguments.");
1020 rte_atomic32_clear(&run_once);
1024 if (eal_plugins_init() < 0) {
1025 rte_eal_init_alert("Cannot init plugins");
1027 rte_atomic32_clear(&run_once);
1031 if (eal_option_device_parse()) {
1033 rte_atomic32_clear(&run_once);
1037 if (rte_config_init() < 0) {
1038 rte_eal_init_alert("Cannot init config");
1042 if (rte_eal_intr_init() < 0) {
1043 rte_eal_init_alert("Cannot init interrupt-handling thread");
1047 if (rte_eal_alarm_init() < 0) {
1048 rte_eal_init_alert("Cannot init alarm");
1049 /* rte_eal_alarm_init sets rte_errno on failure. */
1053 /* Put mp channel init before bus scan so that we can init the vdev
1054 * bus through mp channel in the secondary process before the bus scan.
1056 if (rte_mp_channel_init() < 0 && rte_errno != ENOTSUP) {
1057 rte_eal_init_alert("failed to init mp channel");
1058 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
1064 /* register multi-process action callbacks for hotplug */
1065 if (rte_mp_dev_hotplug_init() < 0) {
1066 rte_eal_init_alert("failed to register mp callback for hotplug");
1070 if (rte_bus_scan()) {
1071 rte_eal_init_alert("Cannot scan the buses for devices");
1073 rte_atomic32_clear(&run_once);
1077 /* if no EAL option "--iova-mode=<pa|va>", use bus IOVA scheme */
1078 if (internal_config.iova_mode == RTE_IOVA_DC) {
1079 /* autodetect the IOVA mapping mode (default is RTE_IOVA_PA) */
1080 rte_eal_get_configuration()->iova_mode =
1081 rte_bus_get_iommu_class();
1083 /* Workaround for KNI which requires physical address to work */
1084 if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA &&
1085 rte_eal_check_module("rte_kni") == 1) {
1086 rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA;
1087 RTE_LOG(WARNING, EAL,
1088 "Some devices want IOVA as VA but PA will be used because.. "
1089 "KNI module inserted\n");
1092 rte_eal_get_configuration()->iova_mode =
1093 internal_config.iova_mode;
1096 if (internal_config.no_hugetlbfs == 0) {
1097 /* rte_config isn't initialized yet */
1098 ret = internal_config.process_type == RTE_PROC_PRIMARY ?
1099 eal_hugepage_info_init() :
1100 eal_hugepage_info_read();
1102 rte_eal_init_alert("Cannot get hugepage information.");
1104 rte_atomic32_clear(&run_once);
1109 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
1110 if (internal_config.no_hugetlbfs)
1111 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
1114 if (internal_config.vmware_tsc_map == 1) {
1115 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
1116 rte_cycles_vmware_tsc_map = 1;
1117 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
1118 "you must have monitor_control.pseudo_perfctr = TRUE\n");
1120 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
1121 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
1125 rte_srand(rte_rdtsc());
1127 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) {
1128 rte_eal_init_alert("Cannot init logging.");
1130 rte_atomic32_clear(&run_once);
1135 if (rte_eal_vfio_setup() < 0) {
1136 rte_eal_init_alert("Cannot init VFIO");
1138 rte_atomic32_clear(&run_once);
1142 /* in secondary processes, memory init may allocate additional fbarrays
1143 * not present in primary processes, so to avoid any potential issues,
1144 * initialize memzones first.
1146 if (rte_eal_memzone_init() < 0) {
1147 rte_eal_init_alert("Cannot init memzone");
1152 if (rte_eal_memory_init() < 0) {
1153 rte_eal_init_alert("Cannot init memory");
1158 /* the directories are locked during eal_hugepage_info_init */
1159 eal_hugedirs_unlock();
1161 if (rte_eal_malloc_heap_init() < 0) {
1162 rte_eal_init_alert("Cannot init malloc heap");
1167 if (rte_eal_tailqs_init() < 0) {
1168 rte_eal_init_alert("Cannot init tail queues for objects");
1173 if (rte_eal_timer_init() < 0) {
1174 rte_eal_init_alert("Cannot init HPET or TSC timers");
1175 rte_errno = ENOTSUP;
1179 eal_check_mem_on_local_socket();
1181 eal_thread_init_master(rte_config.master_lcore);
1183 ret = eal_thread_dump_affinity(cpuset, sizeof(cpuset));
1185 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%zx;cpuset=[%s%s])\n",
1186 rte_config.master_lcore, (uintptr_t)thread_id, cpuset,
1187 ret == 0 ? "" : "...");
1189 RTE_LCORE_FOREACH_SLAVE(i) {
1192 * create communication pipes between master thread
1195 if (pipe(lcore_config[i].pipe_master2slave) < 0)
1196 rte_panic("Cannot create pipe\n");
1197 if (pipe(lcore_config[i].pipe_slave2master) < 0)
1198 rte_panic("Cannot create pipe\n");
1200 lcore_config[i].state = WAIT;
1202 /* create a thread for each lcore */
1203 ret = pthread_create(&lcore_config[i].thread_id, NULL,
1204 eal_thread_loop, NULL);
1206 rte_panic("Cannot create thread\n");
1208 /* Set thread_name for aid in debugging. */
1209 snprintf(thread_name, sizeof(thread_name),
1210 "lcore-slave-%d", i);
1211 ret = rte_thread_setname(lcore_config[i].thread_id,
1215 "Cannot set name for lcore thread\n");
1219 * Launch a dummy function on all slave lcores, so that master lcore
1220 * knows they are all ready when this function returns.
1222 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
1223 rte_eal_mp_wait_lcore();
1225 /* initialize services so vdevs register service during bus_probe. */
1226 ret = rte_service_init();
1228 rte_eal_init_alert("rte_service_init() failed");
1229 rte_errno = ENOEXEC;
1233 /* Probe all the buses and devices/drivers on them */
1234 if (rte_bus_probe()) {
1235 rte_eal_init_alert("Cannot probe devices");
1236 rte_errno = ENOTSUP;
1241 /* Register mp action after probe() so that we got enough info */
1242 if (rte_vfio_is_enabled("vfio") && vfio_mp_sync_setup() < 0)
1246 /* initialize default service/lcore mappings and start running. Ignore
1247 * -ENOTSUP, as it indicates no service coremask passed to EAL.
1249 ret = rte_service_start_with_defaults();
1250 if (ret < 0 && ret != -ENOTSUP) {
1251 rte_errno = ENOEXEC;
1256 * Clean up unused files in runtime directory. We do this at the end of
1257 * init and not at the beginning because we want to clean stuff up
1258 * whether we are primary or secondary process, but we cannot remove
1259 * primary process' files because secondary should be able to run even
1260 * if primary process is dead.
1262 * In no_shconf mode, no runtime directory is created in the first
1263 * place, so no cleanup needed.
1265 if (!internal_config.no_shconf && eal_clean_runtime_dir() < 0) {
1266 rte_eal_init_alert("Cannot clear runtime directory\n");
1270 rte_eal_mcfg_complete();
1272 /* Call each registered callback, if enabled */
1279 mark_freeable(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
1280 void *arg __rte_unused)
1282 /* ms is const, so find this memseg */
1283 struct rte_memseg *found;
1288 found = rte_mem_virt2memseg(ms->addr, msl);
1290 found->flags &= ~RTE_MEMSEG_FLAG_DO_NOT_FREE;
1296 rte_eal_cleanup(void)
1298 /* if we're in a primary process, we need to mark hugepages as freeable
1299 * so that finalization can release them back to the system.
1301 if (rte_eal_process_type() == RTE_PROC_PRIMARY)
1302 rte_memseg_walk(mark_freeable, NULL);
1303 rte_service_finalize();
1304 rte_mp_channel_cleanup();
1305 eal_cleanup_config(&internal_config);
1310 enum rte_lcore_role_t
1311 rte_eal_lcore_role(unsigned lcore_id)
1313 return rte_config.lcore_role[lcore_id];
1316 enum rte_proc_type_t
1317 rte_eal_process_type(void)
1319 return rte_config.process_type;
1322 int rte_eal_has_hugepages(void)
1324 return ! internal_config.no_hugetlbfs;
1327 int rte_eal_has_pci(void)
1329 return !internal_config.no_pci;
1332 int rte_eal_create_uio_dev(void)
1334 return internal_config.create_uio_dev;
1338 rte_eal_vfio_intr_mode(void)
1340 return internal_config.vfio_intr_mode;
1344 rte_eal_check_module(const char *module_name)
1346 char sysfs_mod_name[PATH_MAX];
1350 if (NULL == module_name)
1353 /* Check if there is sysfs mounted */
1354 if (stat("/sys/module", &st) != 0) {
1355 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1356 errno, strerror(errno));
1360 /* A module might be built-in, therefore try sysfs */
1361 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1362 if (n < 0 || n > PATH_MAX) {
1363 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1367 if (stat(sysfs_mod_name, &st) != 0) {
1368 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1369 sysfs_mod_name, errno, strerror(errno));
1373 /* Module has been found */