4 * Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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51 #include <sys/queue.h>
53 #if defined(RTE_ARCH_X86)
57 #include <rte_common.h>
58 #include <rte_debug.h>
59 #include <rte_memory.h>
60 #include <rte_memzone.h>
61 #include <rte_launch.h>
63 #include <rte_eal_memconfig.h>
64 #include <rte_per_lcore.h>
65 #include <rte_lcore.h>
67 #include <rte_random.h>
68 #include <rte_cycles.h>
69 #include <rte_string_fns.h>
70 #include <rte_cpuflags.h>
71 #include <rte_interrupts.h>
73 #include <rte_devargs.h>
74 #include <rte_common.h>
75 #include <rte_version.h>
76 #include <rte_atomic.h>
77 #include <malloc_heap.h>
79 #include "eal_private.h"
80 #include "eal_thread.h"
81 #include "eal_internal_cfg.h"
82 #include "eal_filesystem.h"
83 #include "eal_hugepages.h"
84 #include "eal_options.h"
87 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
89 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
91 /* Allow the application to print its usage message too if set */
92 static rte_usage_hook_t rte_application_usage_hook = NULL;
94 /* early configuration structure, when memory config is not mmapped */
95 static struct rte_mem_config early_mem_config;
97 /* define fd variable here, because file needs to be kept open for the
98 * duration of the program, as we hold a write lock on it in the primary proc */
99 static int mem_cfg_fd = -1;
101 static struct flock wr_lock = {
103 .l_whence = SEEK_SET,
104 .l_start = offsetof(struct rte_mem_config, memseg),
105 .l_len = sizeof(early_mem_config.memseg),
108 /* Address of global and public configuration */
109 static struct rte_config rte_config = {
110 .mem_config = &early_mem_config,
113 /* internal configuration (per-core) */
114 struct lcore_config lcore_config[RTE_MAX_LCORE];
116 /* internal configuration */
117 struct internal_config internal_config;
119 /* used by rte_rdtsc() */
120 int rte_cycles_vmware_tsc_map;
122 /* Return a pointer to the configuration structure */
124 rte_eal_get_configuration(void)
129 /* parse a sysfs (or other) file containing one integer value */
131 eal_parse_sysfs_value(const char *filename, unsigned long *val)
137 if ((f = fopen(filename, "r")) == NULL) {
138 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
143 if (fgets(buf, sizeof(buf), f) == NULL) {
144 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
149 *val = strtoul(buf, &end, 0);
150 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
151 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
161 /* create memory configuration in shared/mmap memory. Take out
162 * a write lock on the memsegs, so we can auto-detect primary/secondary.
163 * This means we never close the file while running (auto-close on exit).
164 * We also don't lock the whole file, so that in future we can use read-locks
165 * on other parts, e.g. memzones, to detect if there are running secondary
168 rte_eal_config_create(void)
170 void *rte_mem_cfg_addr;
173 const char *pathname = eal_runtime_config_path();
175 if (internal_config.no_shconf)
178 /* map the config before hugepage address so that we don't waste a page */
179 if (internal_config.base_virtaddr != 0)
180 rte_mem_cfg_addr = (void *)
181 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
182 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
184 rte_mem_cfg_addr = NULL;
187 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
189 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
192 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
195 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
198 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
201 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
202 "process running?\n", pathname);
205 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
206 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
208 if (rte_mem_cfg_addr == MAP_FAILED){
209 rte_panic("Cannot mmap memory for rte_config\n");
211 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
212 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
214 /* store address of the config in the config itself so that secondary
215 * processes could later map the config into this exact location */
216 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
220 /* attach to an existing shared memory config */
222 rte_eal_config_attach(void)
224 struct rte_mem_config *mem_config;
226 const char *pathname = eal_runtime_config_path();
228 if (internal_config.no_shconf)
232 mem_cfg_fd = open(pathname, O_RDWR);
234 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
237 /* map it as read-only first */
238 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
239 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
240 if (mem_config == MAP_FAILED)
241 rte_panic("Cannot mmap memory for rte_config\n");
243 rte_config.mem_config = mem_config;
246 /* reattach the shared config at exact memory location primary process has it */
248 rte_eal_config_reattach(void)
250 struct rte_mem_config *mem_config;
251 void *rte_mem_cfg_addr;
253 if (internal_config.no_shconf)
256 /* save the address primary process has mapped shared config to */
257 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
259 /* unmap original config */
260 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
262 /* remap the config at proper address */
263 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
264 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
267 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
268 rte_panic("Cannot mmap memory for rte_config\n");
270 rte_config.mem_config = mem_config;
273 /* Detect if we are a primary or a secondary process */
275 eal_proc_type_detect(void)
277 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
278 const char *pathname = eal_runtime_config_path();
280 /* if we can open the file but not get a write-lock we are a secondary
281 * process. NOTE: if we get a file handle back, we keep that open
282 * and don't close it to prevent a race condition between multiple opens */
283 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
284 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
285 ptype = RTE_PROC_SECONDARY;
287 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
288 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
293 /* Sets up rte_config structure with the pointer to shared memory config.*/
295 rte_config_init(void)
297 rte_config.process_type = internal_config.process_type;
299 switch (rte_config.process_type){
300 case RTE_PROC_PRIMARY:
301 rte_eal_config_create();
303 case RTE_PROC_SECONDARY:
304 rte_eal_config_attach();
305 rte_eal_mcfg_wait_complete(rte_config.mem_config);
306 rte_eal_config_reattach();
309 case RTE_PROC_INVALID:
310 rte_panic("Invalid process type\n");
314 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
316 eal_hugedirs_unlock(void)
320 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
322 /* skip uninitialized */
323 if (internal_config.hugepage_info[i].lock_descriptor < 0)
325 /* unlock hugepage file */
326 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
327 close(internal_config.hugepage_info[i].lock_descriptor);
328 /* reset the field */
329 internal_config.hugepage_info[i].lock_descriptor = -1;
335 eal_usage(const char *prgname)
337 printf("\nUsage: %s ", prgname);
339 printf("EAL Linux options:\n"
340 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
341 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
342 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
343 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
344 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
345 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
346 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
348 /* Allow the application to print its usage message too if hook is set */
349 if ( rte_application_usage_hook ) {
350 printf("===== Application Usage =====\n\n");
351 rte_application_usage_hook(prgname);
355 /* Set a per-application usage message */
357 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
359 rte_usage_hook_t old_func;
361 /* Will be NULL on the first call to denote the last usage routine. */
362 old_func = rte_application_usage_hook;
363 rte_application_usage_hook = usage_func;
369 eal_parse_socket_mem(char *socket_mem)
371 char * arg[RTE_MAX_NUMA_NODES];
374 uint64_t total_mem = 0;
376 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
377 if (len == SOCKET_MEM_STRLEN) {
378 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
382 /* all other error cases will be caught later */
383 if (!isdigit(socket_mem[len-1]))
386 /* split the optarg into separate socket values */
387 arg_num = rte_strsplit(socket_mem, len,
388 arg, RTE_MAX_NUMA_NODES, ',');
390 /* if split failed, or 0 arguments */
394 internal_config.force_sockets = 1;
396 /* parse each defined socket option */
398 for (i = 0; i < arg_num; i++) {
400 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
402 /* check for invalid input */
404 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
406 internal_config.socket_mem[i] *= 1024ULL;
407 internal_config.socket_mem[i] *= 1024ULL;
408 total_mem += internal_config.socket_mem[i];
411 /* check if we have a positive amount of total memory */
419 eal_parse_base_virtaddr(const char *arg)
425 addr = strtoull(arg, &end, 16);
427 /* check for errors */
428 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
431 /* make sure we don't exceed 32-bit boundary on 32-bit target */
433 if (addr >= UINTPTR_MAX)
437 /* align the addr on 16M boundary, 16MB is the minimum huge page
438 * size on IBM Power architecture. If the addr is aligned to 16MB,
439 * it can align to 2MB for x86. So this alignment can also be used
441 internal_config.base_virtaddr =
442 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
448 eal_parse_vfio_intr(const char *mode)
453 enum rte_intr_mode value;
455 { "legacy", RTE_INTR_MODE_LEGACY },
456 { "msi", RTE_INTR_MODE_MSI },
457 { "msix", RTE_INTR_MODE_MSIX },
460 for (i = 0; i < RTE_DIM(map); i++) {
461 if (!strcmp(mode, map[i].name)) {
462 internal_config.vfio_intr_mode = map[i].value;
469 /* Parse the arguments for --log-level only */
471 eal_log_level_parse(int argc, char **argv)
476 const int old_optind = optind;
477 const int old_optopt = optopt;
478 char * const old_optarg = optarg;
483 eal_reset_internal_config(&internal_config);
485 while ((opt = getopt_long(argc, argvopt, eal_short_options,
486 eal_long_options, &option_index)) != EOF) {
490 /* getopt is not happy, stop right now */
494 ret = (opt == OPT_LOG_LEVEL_NUM) ?
495 eal_parse_common_option(opt, optarg, &internal_config) : 0;
497 /* common parser is not happy */
502 /* restore getopt lib */
508 /* Parse the argument given in the command line of the application */
510 eal_parse_args(int argc, char **argv)
515 char *prgname = argv[0];
516 const int old_optind = optind;
517 const int old_optopt = optopt;
518 char * const old_optarg = optarg;
523 while ((opt = getopt_long(argc, argvopt, eal_short_options,
524 eal_long_options, &option_index)) != EOF) {
526 /* getopt is not happy, stop right now */
533 ret = eal_parse_common_option(opt, optarg, &internal_config);
534 /* common parser is not happy */
540 /* common parser handled this option */
550 case OPT_XEN_DOM0_NUM:
551 #ifdef RTE_LIBRTE_XEN_DOM0
552 internal_config.xen_dom0_support = 1;
554 RTE_LOG(ERR, EAL, "Can't support DPDK app "
555 "running on Dom0, please configure"
556 " RTE_LIBRTE_XEN_DOM0=y\n");
562 case OPT_HUGE_DIR_NUM:
563 internal_config.hugepage_dir = optarg;
566 case OPT_FILE_PREFIX_NUM:
567 internal_config.hugefile_prefix = optarg;
570 case OPT_SOCKET_MEM_NUM:
571 if (eal_parse_socket_mem(optarg) < 0) {
572 RTE_LOG(ERR, EAL, "invalid parameters for --"
573 OPT_SOCKET_MEM "\n");
580 case OPT_BASE_VIRTADDR_NUM:
581 if (eal_parse_base_virtaddr(optarg) < 0) {
582 RTE_LOG(ERR, EAL, "invalid parameter for --"
583 OPT_BASE_VIRTADDR "\n");
590 case OPT_VFIO_INTR_NUM:
591 if (eal_parse_vfio_intr(optarg) < 0) {
592 RTE_LOG(ERR, EAL, "invalid parameters for --"
600 case OPT_CREATE_UIO_DEV_NUM:
601 internal_config.create_uio_dev = 1;
605 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
606 RTE_LOG(ERR, EAL, "Option %c is not supported "
608 } else if (opt >= OPT_LONG_MIN_NUM &&
609 opt < OPT_LONG_MAX_NUM) {
610 RTE_LOG(ERR, EAL, "Option %s is not supported "
612 eal_long_options[option_index].name);
614 RTE_LOG(ERR, EAL, "Option %d is not supported "
623 if (eal_adjust_config(&internal_config) != 0) {
629 if (eal_check_common_options(&internal_config) != 0) {
635 /* --xen-dom0 doesn't make sense with --socket-mem */
636 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
637 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
638 "together with --"OPT_XEN_DOM0"\n");
645 argv[optind-1] = prgname;
649 /* restore getopt lib */
658 eal_check_mem_on_local_socket(void)
660 const struct rte_memseg *ms;
663 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
665 ms = rte_eal_get_physmem_layout();
667 for (i = 0; i < RTE_MAX_MEMSEG; i++)
668 if (ms[i].socket_id == socket_id &&
672 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
673 "memory on local socket!\n");
677 sync_func(__attribute__((unused)) void *arg)
683 rte_eal_mcfg_complete(void)
685 /* ALL shared mem_config related INIT DONE */
686 if (rte_config.process_type == RTE_PROC_PRIMARY)
687 rte_config.mem_config->magic = RTE_MAGIC;
691 * Request iopl privilege for all RPL, returns 0 on success
692 * iopl() call is mostly for the i386 architecture. For other architectures,
693 * return -1 to indicate IO privilege can't be changed in this way.
696 rte_eal_iopl_init(void)
698 #if defined(RTE_ARCH_X86)
706 static int rte_eal_vfio_setup(void)
708 int vfio_enabled = 0;
710 if (!internal_config.no_pci) {
712 vfio_enabled |= pci_vfio_is_enabled();
717 /* if we are primary process, create a thread to communicate with
718 * secondary processes. the thread will use a socket to wait for
719 * requests from secondary process to send open file descriptors,
720 * because VFIO does not allow multiple open descriptors on a group or
723 if (internal_config.process_type == RTE_PROC_PRIMARY &&
724 vfio_mp_sync_setup() < 0)
732 /* Launch threads, called at application init(). */
734 rte_eal_init(int argc, char **argv)
738 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
740 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
741 char thread_name[RTE_MAX_THREAD_NAME_LEN];
743 if (!rte_atomic32_test_and_set(&run_once))
746 logid = strrchr(argv[0], '/');
747 logid = strdup(logid ? logid + 1: argv[0]);
749 thread_id = pthread_self();
751 if (rte_eal_log_early_init() < 0)
752 rte_panic("Cannot init early logs\n");
754 eal_log_level_parse(argc, argv);
756 /* set log level as early as possible */
757 rte_set_log_level(internal_config.log_level);
759 if (rte_eal_cpu_init() < 0)
760 rte_panic("Cannot detect lcores\n");
762 fctret = eal_parse_args(argc, argv);
766 if (internal_config.no_hugetlbfs == 0 &&
767 internal_config.process_type != RTE_PROC_SECONDARY &&
768 internal_config.xen_dom0_support == 0 &&
769 eal_hugepage_info_init() < 0)
770 rte_panic("Cannot get hugepage information\n");
772 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
773 if (internal_config.no_hugetlbfs)
774 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
777 if (internal_config.vmware_tsc_map == 1) {
778 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
779 rte_cycles_vmware_tsc_map = 1;
780 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
781 "you must have monitor_control.pseudo_perfctr = TRUE\n");
783 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
784 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
788 rte_srand(rte_rdtsc());
792 if (rte_eal_pci_init() < 0)
793 rte_panic("Cannot init PCI\n");
796 if (rte_eal_vfio_setup() < 0)
797 rte_panic("Cannot init VFIO\n");
800 if (rte_eal_memory_init() < 0)
801 rte_panic("Cannot init memory\n");
803 /* the directories are locked during eal_hugepage_info_init */
804 eal_hugedirs_unlock();
806 if (rte_eal_memzone_init() < 0)
807 rte_panic("Cannot init memzone\n");
809 if (rte_eal_tailqs_init() < 0)
810 rte_panic("Cannot init tail queues for objects\n");
812 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
813 rte_panic("Cannot init logs\n");
815 if (rte_eal_alarm_init() < 0)
816 rte_panic("Cannot init interrupt-handling thread\n");
818 if (rte_eal_timer_init() < 0)
819 rte_panic("Cannot init HPET or TSC timers\n");
821 eal_check_mem_on_local_socket();
823 if (eal_plugins_init() < 0)
824 rte_panic("Cannot init plugins\n");
826 eal_thread_init_master(rte_config.master_lcore);
828 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
830 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
831 rte_config.master_lcore, (int)thread_id, cpuset,
832 ret == 0 ? "" : "...");
834 if (rte_eal_dev_init() < 0)
835 rte_panic("Cannot init pmd devices\n");
837 if (rte_eal_intr_init() < 0)
838 rte_panic("Cannot init interrupt-handling thread\n");
840 RTE_LCORE_FOREACH_SLAVE(i) {
843 * create communication pipes between master thread
846 if (pipe(lcore_config[i].pipe_master2slave) < 0)
847 rte_panic("Cannot create pipe\n");
848 if (pipe(lcore_config[i].pipe_slave2master) < 0)
849 rte_panic("Cannot create pipe\n");
851 lcore_config[i].state = WAIT;
853 /* create a thread for each lcore */
854 ret = pthread_create(&lcore_config[i].thread_id, NULL,
855 eal_thread_loop, NULL);
857 rte_panic("Cannot create thread\n");
859 /* Set thread_name for aid in debugging. */
860 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
861 "lcore-slave-%d", i);
862 ret = rte_thread_setname(lcore_config[i].thread_id,
866 "Cannot set name for lcore thread\n");
870 * Launch a dummy function on all slave lcores, so that master lcore
871 * knows they are all ready when this function returns.
873 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
874 rte_eal_mp_wait_lcore();
876 /* Probe & Initialize PCI devices */
877 if (rte_eal_pci_probe())
878 rte_panic("Cannot probe PCI\n");
880 rte_eal_mcfg_complete();
886 enum rte_lcore_role_t
887 rte_eal_lcore_role(unsigned lcore_id)
889 return rte_config.lcore_role[lcore_id];
893 rte_eal_process_type(void)
895 return rte_config.process_type;
898 int rte_eal_has_hugepages(void)
900 return ! internal_config.no_hugetlbfs;
904 rte_eal_check_module(const char *module_name)
906 char sysfs_mod_name[PATH_MAX];
910 if (NULL == module_name)
913 /* Check if there is sysfs mounted */
914 if (stat("/sys/module", &st) != 0) {
915 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
916 errno, strerror(errno));
920 /* A module might be built-in, therefore try sysfs */
921 n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
922 if (n < 0 || n > PATH_MAX) {
923 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
927 if (stat(sysfs_mod_name, &st) != 0) {
928 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
929 sysfs_mod_name, errno, strerror(errno));
933 /* Module has been found */