4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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9 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions and the following disclaimer in
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 #include <sys/queue.h>
53 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
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>
78 #include <rte_eth_ring.h>
80 #include "eal_private.h"
81 #include "eal_thread.h"
82 #include "eal_internal_cfg.h"
83 #include "eal_filesystem.h"
84 #include "eal_hugepages.h"
85 #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 TAILQ_HEAD(shared_driver_list, shared_driver);
96 /* Definition for shared object drivers. */
97 struct shared_driver {
98 TAILQ_ENTRY(shared_driver) next;
104 /* List of external loadable drivers */
105 static struct shared_driver_list solib_list =
106 TAILQ_HEAD_INITIALIZER(solib_list);
108 /* early configuration structure, when memory config is not mmapped */
109 static struct rte_mem_config early_mem_config;
111 /* define fd variable here, because file needs to be kept open for the
112 * duration of the program, as we hold a write lock on it in the primary proc */
113 static int mem_cfg_fd = -1;
115 static struct flock wr_lock = {
117 .l_whence = SEEK_SET,
118 .l_start = offsetof(struct rte_mem_config, memseg),
119 .l_len = sizeof(early_mem_config.memseg),
122 /* Address of global and public configuration */
123 static struct rte_config rte_config = {
124 .mem_config = &early_mem_config,
127 /* internal configuration (per-core) */
128 struct lcore_config lcore_config[RTE_MAX_LCORE];
130 /* internal configuration */
131 struct internal_config internal_config;
133 /* used by rte_rdtsc() */
134 int rte_cycles_vmware_tsc_map;
136 /* Return a pointer to the configuration structure */
138 rte_eal_get_configuration(void)
143 /* parse a sysfs (or other) file containing one integer value */
145 eal_parse_sysfs_value(const char *filename, unsigned long *val)
151 if ((f = fopen(filename, "r")) == NULL) {
152 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
157 if (fgets(buf, sizeof(buf), f) == NULL) {
158 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
163 *val = strtoul(buf, &end, 0);
164 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
165 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
175 /* create memory configuration in shared/mmap memory. Take out
176 * a write lock on the memsegs, so we can auto-detect primary/secondary.
177 * This means we never close the file while running (auto-close on exit).
178 * We also don't lock the whole file, so that in future we can use read-locks
179 * on other parts, e.g. memzones, to detect if there are running secondary
182 rte_eal_config_create(void)
184 void *rte_mem_cfg_addr;
187 const char *pathname = eal_runtime_config_path();
189 if (internal_config.no_shconf)
192 /* map the config before hugepage address so that we don't waste a page */
193 if (internal_config.base_virtaddr != 0)
194 rte_mem_cfg_addr = (void *)
195 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
196 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
198 rte_mem_cfg_addr = NULL;
201 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
203 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
206 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
209 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
212 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
215 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
216 "process running?\n", pathname);
219 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
220 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
222 if (rte_mem_cfg_addr == MAP_FAILED){
223 rte_panic("Cannot mmap memory for rte_config\n");
225 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
226 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
228 /* store address of the config in the config itself so that secondary
229 * processes could later map the config into this exact location */
230 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
234 /* attach to an existing shared memory config */
236 rte_eal_config_attach(void)
238 struct rte_mem_config *mem_config;
240 const char *pathname = eal_runtime_config_path();
242 if (internal_config.no_shconf)
246 mem_cfg_fd = open(pathname, O_RDWR);
248 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
251 /* map it as read-only first */
252 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
253 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
254 if (mem_config == MAP_FAILED)
255 rte_panic("Cannot mmap memory for rte_config\n");
257 rte_config.mem_config = mem_config;
260 /* reattach the shared config at exact memory location primary process has it */
262 rte_eal_config_reattach(void)
264 struct rte_mem_config *mem_config;
265 void *rte_mem_cfg_addr;
267 if (internal_config.no_shconf)
270 /* save the address primary process has mapped shared config to */
271 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
273 /* unmap original config */
274 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
276 /* remap the config at proper address */
277 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
278 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
281 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
282 rte_panic("Cannot mmap memory for rte_config\n");
284 rte_config.mem_config = mem_config;
287 /* Detect if we are a primary or a secondary process */
289 eal_proc_type_detect(void)
291 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
292 const char *pathname = eal_runtime_config_path();
294 /* if we can open the file but not get a write-lock we are a secondary
295 * process. NOTE: if we get a file handle back, we keep that open
296 * and don't close it to prevent a race condition between multiple opens */
297 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
298 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
299 ptype = RTE_PROC_SECONDARY;
301 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
302 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
307 /* Sets up rte_config structure with the pointer to shared memory config.*/
309 rte_config_init(void)
311 rte_config.process_type = internal_config.process_type;
313 switch (rte_config.process_type){
314 case RTE_PROC_PRIMARY:
315 rte_eal_config_create();
317 case RTE_PROC_SECONDARY:
318 rte_eal_config_attach();
319 rte_eal_mcfg_wait_complete(rte_config.mem_config);
320 rte_eal_config_reattach();
323 case RTE_PROC_INVALID:
324 rte_panic("Invalid process type\n");
328 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
330 eal_hugedirs_unlock(void)
334 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
336 /* skip uninitialized */
337 if (internal_config.hugepage_info[i].lock_descriptor < 0)
339 /* unlock hugepage file */
340 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
341 close(internal_config.hugepage_info[i].lock_descriptor);
342 /* reset the field */
343 internal_config.hugepage_info[i].lock_descriptor = -1;
349 eal_usage(const char *prgname)
351 printf("\nUsage: %s ", prgname);
353 printf("EAL Linux options:\n"
354 " -d LIB.so Add driver (can be used multiple times)\n"
355 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
356 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
357 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
358 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
359 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
360 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
361 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
363 /* Allow the application to print its usage message too if hook is set */
364 if ( rte_application_usage_hook ) {
365 printf("===== Application Usage =====\n\n");
366 rte_application_usage_hook(prgname);
370 /* Set a per-application usage message */
372 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
374 rte_usage_hook_t old_func;
376 /* Will be NULL on the first call to denote the last usage routine. */
377 old_func = rte_application_usage_hook;
378 rte_application_usage_hook = usage_func;
384 eal_parse_socket_mem(char *socket_mem)
386 char * arg[RTE_MAX_NUMA_NODES];
389 uint64_t total_mem = 0;
391 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
392 if (len == SOCKET_MEM_STRLEN) {
393 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
397 /* all other error cases will be caught later */
398 if (!isdigit(socket_mem[len-1]))
401 /* split the optarg into separate socket values */
402 arg_num = rte_strsplit(socket_mem, len,
403 arg, RTE_MAX_NUMA_NODES, ',');
405 /* if split failed, or 0 arguments */
409 internal_config.force_sockets = 1;
411 /* parse each defined socket option */
413 for (i = 0; i < arg_num; i++) {
415 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
417 /* check for invalid input */
419 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
421 internal_config.socket_mem[i] *= 1024ULL;
422 internal_config.socket_mem[i] *= 1024ULL;
423 total_mem += internal_config.socket_mem[i];
426 /* check if we have a positive amount of total memory */
434 eal_parse_base_virtaddr(const char *arg)
440 addr = strtoull(arg, &end, 16);
442 /* check for errors */
443 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
446 /* make sure we don't exceed 32-bit boundary on 32-bit target */
448 if (addr >= UINTPTR_MAX)
452 /* align the addr on 16M boundary, 16MB is the minimum huge page
453 * size on IBM Power architecture. If the addr is aligned to 16MB,
454 * it can align to 2MB for x86. So this alignment can also be used
456 internal_config.base_virtaddr =
457 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
463 eal_parse_vfio_intr(const char *mode)
468 enum rte_intr_mode value;
470 { "legacy", RTE_INTR_MODE_LEGACY },
471 { "msi", RTE_INTR_MODE_MSI },
472 { "msix", RTE_INTR_MODE_MSIX },
475 for (i = 0; i < RTE_DIM(map); i++) {
476 if (!strcmp(mode, map[i].name)) {
477 internal_config.vfio_intr_mode = map[i].value;
485 eal_get_hugepage_mem_size(void)
490 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
491 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
492 if (hpi->hugedir != NULL) {
493 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
494 size += hpi->hugepage_sz * hpi->num_pages[j];
499 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
502 /* Parse the arguments for --log-level only */
504 eal_log_level_parse(int argc, char **argv)
512 eal_reset_internal_config(&internal_config);
514 while ((opt = getopt_long(argc, argvopt, eal_short_options,
515 eal_long_options, &option_index)) != EOF) {
519 /* getopt is not happy, stop right now */
523 ret = (opt == OPT_LOG_LEVEL_NUM) ?
524 eal_parse_common_option(opt, optarg, &internal_config) : 0;
526 /* common parser is not happy */
531 optind = 0; /* reset getopt lib */
534 /* Parse the argument given in the command line of the application */
536 eal_parse_args(int argc, char **argv)
541 char *prgname = argv[0];
542 struct shared_driver *solib;
546 while ((opt = getopt_long(argc, argvopt, eal_short_options,
547 eal_long_options, &option_index)) != EOF) {
551 /* getopt is not happy, stop right now */
557 ret = eal_parse_common_option(opt, optarg, &internal_config);
558 /* common parser is not happy */
563 /* common parser handled this option */
572 /* force loading of external driver */
574 solib = malloc(sizeof(*solib));
576 RTE_LOG(ERR, EAL, "malloc(solib) failed\n");
579 memset(solib, 0, sizeof(*solib));
580 strncpy(solib->name, optarg, PATH_MAX-1);
581 solib->name[PATH_MAX-1] = 0;
582 TAILQ_INSERT_TAIL(&solib_list, solib, next);
586 case OPT_XEN_DOM0_NUM:
587 #ifdef RTE_LIBRTE_XEN_DOM0
588 internal_config.xen_dom0_support = 1;
590 RTE_LOG(ERR, EAL, "Can't support DPDK app "
591 "running on Dom0, please configure"
592 " RTE_LIBRTE_XEN_DOM0=y\n");
597 case OPT_HUGE_DIR_NUM:
598 internal_config.hugepage_dir = optarg;
601 case OPT_FILE_PREFIX_NUM:
602 internal_config.hugefile_prefix = optarg;
605 case OPT_SOCKET_MEM_NUM:
606 if (eal_parse_socket_mem(optarg) < 0) {
607 RTE_LOG(ERR, EAL, "invalid parameters for --"
608 OPT_SOCKET_MEM "\n");
614 case OPT_BASE_VIRTADDR_NUM:
615 if (eal_parse_base_virtaddr(optarg) < 0) {
616 RTE_LOG(ERR, EAL, "invalid parameter for --"
617 OPT_BASE_VIRTADDR "\n");
623 case OPT_VFIO_INTR_NUM:
624 if (eal_parse_vfio_intr(optarg) < 0) {
625 RTE_LOG(ERR, EAL, "invalid parameters for --"
632 case OPT_CREATE_UIO_DEV_NUM:
633 internal_config.create_uio_dev = 1;
637 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
638 RTE_LOG(ERR, EAL, "Option %c is not supported "
640 } else if (opt >= OPT_LONG_MIN_NUM &&
641 opt < OPT_LONG_MAX_NUM) {
642 RTE_LOG(ERR, EAL, "Option %s is not supported "
644 eal_long_options[option_index].name);
646 RTE_LOG(ERR, EAL, "Option %d is not supported "
654 if (eal_adjust_config(&internal_config) != 0)
658 if (eal_check_common_options(&internal_config) != 0) {
663 /* --xen-dom0 doesn't make sense with --socket-mem */
664 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
665 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
666 "together with --"OPT_XEN_DOM0"\n");
672 argv[optind-1] = prgname;
674 optind = 0; /* reset getopt lib */
679 eal_check_mem_on_local_socket(void)
681 const struct rte_memseg *ms;
684 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
686 ms = rte_eal_get_physmem_layout();
688 for (i = 0; i < RTE_MAX_MEMSEG; i++)
689 if (ms[i].socket_id == socket_id &&
693 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
694 "memory on local socket!\n");
698 sync_func(__attribute__((unused)) void *arg)
704 rte_eal_mcfg_complete(void)
706 /* ALL shared mem_config related INIT DONE */
707 if (rte_config.process_type == RTE_PROC_PRIMARY)
708 rte_config.mem_config->magic = RTE_MAGIC;
712 * Request iopl privilege for all RPL, returns 0 on success
713 * iopl() call is mostly for the i386 architecture. For other architectures,
714 * return -1 to indicate IO privilege can't be changed in this way.
717 rte_eal_iopl_init(void)
719 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
728 /* Launch threads, called at application init(). */
730 rte_eal_init(int argc, char **argv)
734 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
735 struct shared_driver *solib = NULL;
737 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
739 if (!rte_atomic32_test_and_set(&run_once))
742 logid = strrchr(argv[0], '/');
743 logid = strdup(logid ? logid + 1: argv[0]);
745 thread_id = pthread_self();
747 if (rte_eal_log_early_init() < 0)
748 rte_panic("Cannot init early logs\n");
750 eal_log_level_parse(argc, argv);
752 /* set log level as early as possible */
753 rte_set_log_level(internal_config.log_level);
755 if (rte_eal_cpu_init() < 0)
756 rte_panic("Cannot detect lcores\n");
758 fctret = eal_parse_args(argc, argv);
762 if (internal_config.no_hugetlbfs == 0 &&
763 internal_config.process_type != RTE_PROC_SECONDARY &&
764 internal_config.xen_dom0_support == 0 &&
765 eal_hugepage_info_init() < 0)
766 rte_panic("Cannot get hugepage information\n");
768 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
769 if (internal_config.no_hugetlbfs)
770 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
772 internal_config.memory = eal_get_hugepage_mem_size();
775 if (internal_config.vmware_tsc_map == 1) {
776 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
777 rte_cycles_vmware_tsc_map = 1;
778 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
779 "you must have monitor_control.pseudo_perfctr = TRUE\n");
781 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
782 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
786 rte_srand(rte_rdtsc());
790 if (rte_eal_pci_init() < 0)
791 rte_panic("Cannot init PCI\n");
793 #ifdef RTE_LIBRTE_IVSHMEM
794 if (rte_eal_ivshmem_init() < 0)
795 rte_panic("Cannot init IVSHMEM\n");
798 if (rte_eal_memory_init() < 0)
799 rte_panic("Cannot init memory\n");
801 /* the directories are locked during eal_hugepage_info_init */
802 eal_hugedirs_unlock();
804 if (rte_eal_memzone_init() < 0)
805 rte_panic("Cannot init memzone\n");
807 if (rte_eal_tailqs_init() < 0)
808 rte_panic("Cannot init tail queues for objects\n");
810 #ifdef RTE_LIBRTE_IVSHMEM
811 if (rte_eal_ivshmem_obj_init() < 0)
812 rte_panic("Cannot init IVSHMEM objects\n");
815 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
816 rte_panic("Cannot init logs\n");
818 if (rte_eal_alarm_init() < 0)
819 rte_panic("Cannot init interrupt-handling thread\n");
821 if (rte_eal_intr_init() < 0)
822 rte_panic("Cannot init interrupt-handling thread\n");
824 if (rte_eal_timer_init() < 0)
825 rte_panic("Cannot init HPET or TSC timers\n");
827 eal_check_mem_on_local_socket();
829 rte_eal_mcfg_complete();
831 TAILQ_FOREACH(solib, &solib_list, next) {
832 RTE_LOG(DEBUG, EAL, "open shared lib %s\n", solib->name);
833 solib->lib_handle = dlopen(solib->name, RTLD_NOW);
834 if (solib->lib_handle == NULL)
835 RTE_LOG(WARNING, EAL, "%s\n", dlerror());
838 eal_thread_init_master(rte_config.master_lcore);
840 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
842 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
843 rte_config.master_lcore, (int)thread_id, cpuset,
844 ret == 0 ? "" : "...");
846 if (rte_eal_dev_init() < 0)
847 rte_panic("Cannot init pmd devices\n");
849 RTE_LCORE_FOREACH_SLAVE(i) {
852 * create communication pipes between master thread
855 if (pipe(lcore_config[i].pipe_master2slave) < 0)
856 rte_panic("Cannot create pipe\n");
857 if (pipe(lcore_config[i].pipe_slave2master) < 0)
858 rte_panic("Cannot create pipe\n");
860 lcore_config[i].state = WAIT;
862 /* create a thread for each lcore */
863 ret = pthread_create(&lcore_config[i].thread_id, NULL,
864 eal_thread_loop, NULL);
866 rte_panic("Cannot create 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");
884 enum rte_lcore_role_t
885 rte_eal_lcore_role(unsigned lcore_id)
887 return rte_config.lcore_role[lcore_id];
891 rte_eal_process_type(void)
893 return rte_config.process_type;
896 int rte_eal_has_hugepages(void)
898 return ! internal_config.no_hugetlbfs;
902 rte_eal_check_module(const char *module_name)
904 char mod_name[30]; /* Any module names can be longer than 30 bytes? */
908 if (NULL == module_name)
911 FILE *fd = fopen("/proc/modules", "r");
913 RTE_LOG(ERR, EAL, "Open /proc/modules failed!"
914 " error %i (%s)\n", errno, strerror(errno));
918 n = fscanf(fd, "%29s %*[^\n]", mod_name);
919 if ((n == 1) && !strcmp(mod_name, module_name)) {