4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 * Copyright(c) 2012-2014 6WIND S.A.
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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>
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"
86 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
88 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
90 /* Allow the application to print its usage message too if set */
91 static rte_usage_hook_t rte_application_usage_hook = NULL;
93 TAILQ_HEAD(shared_driver_list, shared_driver);
95 /* Definition for shared object drivers. */
96 struct shared_driver {
97 TAILQ_ENTRY(shared_driver) next;
103 /* List of external loadable drivers */
104 static struct shared_driver_list solib_list =
105 TAILQ_HEAD_INITIALIZER(solib_list);
107 /* early configuration structure, when memory config is not mmapped */
108 static struct rte_mem_config early_mem_config;
110 /* define fd variable here, because file needs to be kept open for the
111 * duration of the program, as we hold a write lock on it in the primary proc */
112 static int mem_cfg_fd = -1;
114 static struct flock wr_lock = {
116 .l_whence = SEEK_SET,
117 .l_start = offsetof(struct rte_mem_config, memseg),
118 .l_len = sizeof(early_mem_config.memseg),
121 /* Address of global and public configuration */
122 static struct rte_config rte_config = {
123 .mem_config = &early_mem_config,
126 /* internal configuration (per-core) */
127 struct lcore_config lcore_config[RTE_MAX_LCORE];
129 /* internal configuration */
130 struct internal_config internal_config;
132 /* used by rte_rdtsc() */
133 int rte_cycles_vmware_tsc_map;
135 /* Return a pointer to the configuration structure */
137 rte_eal_get_configuration(void)
142 /* parse a sysfs (or other) file containing one integer value */
144 eal_parse_sysfs_value(const char *filename, unsigned long *val)
150 if ((f = fopen(filename, "r")) == NULL) {
151 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
156 if (fgets(buf, sizeof(buf), f) == NULL) {
157 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
162 *val = strtoul(buf, &end, 0);
163 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
164 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
174 /* create memory configuration in shared/mmap memory. Take out
175 * a write lock on the memsegs, so we can auto-detect primary/secondary.
176 * This means we never close the file while running (auto-close on exit).
177 * We also don't lock the whole file, so that in future we can use read-locks
178 * on other parts, e.g. memzones, to detect if there are running secondary
181 rte_eal_config_create(void)
183 void *rte_mem_cfg_addr;
186 const char *pathname = eal_runtime_config_path();
188 if (internal_config.no_shconf)
191 /* map the config before hugepage address so that we don't waste a page */
192 if (internal_config.base_virtaddr != 0)
193 rte_mem_cfg_addr = (void *)
194 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
195 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
197 rte_mem_cfg_addr = NULL;
200 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
202 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
205 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
208 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
211 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
214 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
215 "process running?\n", pathname);
218 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
219 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
221 if (rte_mem_cfg_addr == MAP_FAILED){
222 rte_panic("Cannot mmap memory for rte_config\n");
224 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
225 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
227 /* store address of the config in the config itself so that secondary
228 * processes could later map the config into this exact location */
229 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
233 /* attach to an existing shared memory config */
235 rte_eal_config_attach(void)
237 struct rte_mem_config *mem_config;
239 const char *pathname = eal_runtime_config_path();
241 if (internal_config.no_shconf)
245 mem_cfg_fd = open(pathname, O_RDWR);
247 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
250 /* map it as read-only first */
251 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
252 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
253 if (mem_config == MAP_FAILED)
254 rte_panic("Cannot mmap memory for rte_config\n");
256 rte_config.mem_config = mem_config;
259 /* reattach the shared config at exact memory location primary process has it */
261 rte_eal_config_reattach(void)
263 struct rte_mem_config *mem_config;
264 void *rte_mem_cfg_addr;
266 if (internal_config.no_shconf)
269 /* save the address primary process has mapped shared config to */
270 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
272 /* unmap original config */
273 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
275 /* remap the config at proper address */
276 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
277 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
280 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
281 rte_panic("Cannot mmap memory for rte_config\n");
283 rte_config.mem_config = mem_config;
286 /* Detect if we are a primary or a secondary process */
288 eal_proc_type_detect(void)
290 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
291 const char *pathname = eal_runtime_config_path();
293 /* if we can open the file but not get a write-lock we are a secondary
294 * process. NOTE: if we get a file handle back, we keep that open
295 * and don't close it to prevent a race condition between multiple opens */
296 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
297 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
298 ptype = RTE_PROC_SECONDARY;
300 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
301 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
306 /* Sets up rte_config structure with the pointer to shared memory config.*/
308 rte_config_init(void)
310 rte_config.process_type = internal_config.process_type;
312 switch (rte_config.process_type){
313 case RTE_PROC_PRIMARY:
314 rte_eal_config_create();
316 case RTE_PROC_SECONDARY:
317 rte_eal_config_attach();
318 rte_eal_mcfg_wait_complete(rte_config.mem_config);
319 rte_eal_config_reattach();
322 case RTE_PROC_INVALID:
323 rte_panic("Invalid process type\n");
327 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
329 eal_hugedirs_unlock(void)
333 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
335 /* skip uninitialized */
336 if (internal_config.hugepage_info[i].lock_descriptor < 0)
338 /* unlock hugepage file */
339 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
340 close(internal_config.hugepage_info[i].lock_descriptor);
341 /* reset the field */
342 internal_config.hugepage_info[i].lock_descriptor = -1;
348 eal_usage(const char *prgname)
350 printf("\nUsage: %s ", prgname);
352 printf("EAL Linux options:\n"
353 " -d LIB.so Add driver (can be used multiple times)\n"
354 " --"OPT_SOCKET_MEM" Memory to allocate on sockets (comma separated values)\n"
355 " --"OPT_HUGE_DIR" Directory where hugetlbfs is mounted\n"
356 " --"OPT_FILE_PREFIX" Prefix for hugepage filenames\n"
357 " --"OPT_BASE_VIRTADDR" Base virtual address\n"
358 " --"OPT_CREATE_UIO_DEV" Create /dev/uioX (usually done by hotplug)\n"
359 " --"OPT_VFIO_INTR" Interrupt mode for VFIO (legacy|msi|msix)\n"
360 " --"OPT_XEN_DOM0" Support running on Xen dom0 without hugetlbfs\n"
362 /* Allow the application to print its usage message too if hook is set */
363 if ( rte_application_usage_hook ) {
364 printf("===== Application Usage =====\n\n");
365 rte_application_usage_hook(prgname);
369 /* Set a per-application usage message */
371 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
373 rte_usage_hook_t old_func;
375 /* Will be NULL on the first call to denote the last usage routine. */
376 old_func = rte_application_usage_hook;
377 rte_application_usage_hook = usage_func;
383 eal_parse_socket_mem(char *socket_mem)
385 char * arg[RTE_MAX_NUMA_NODES];
388 uint64_t total_mem = 0;
390 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
391 if (len == SOCKET_MEM_STRLEN) {
392 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
396 /* all other error cases will be caught later */
397 if (!isdigit(socket_mem[len-1]))
400 /* split the optarg into separate socket values */
401 arg_num = rte_strsplit(socket_mem, len,
402 arg, RTE_MAX_NUMA_NODES, ',');
404 /* if split failed, or 0 arguments */
408 internal_config.force_sockets = 1;
410 /* parse each defined socket option */
412 for (i = 0; i < arg_num; i++) {
414 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
416 /* check for invalid input */
418 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
420 internal_config.socket_mem[i] *= 1024ULL;
421 internal_config.socket_mem[i] *= 1024ULL;
422 total_mem += internal_config.socket_mem[i];
425 /* check if we have a positive amount of total memory */
433 eal_parse_base_virtaddr(const char *arg)
439 addr = strtoull(arg, &end, 16);
441 /* check for errors */
442 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
445 /* make sure we don't exceed 32-bit boundary on 32-bit target */
447 if (addr >= UINTPTR_MAX)
451 /* align the addr on 16M boundary, 16MB is the minimum huge page
452 * size on IBM Power architecture. If the addr is aligned to 16MB,
453 * it can align to 2MB for x86. So this alignment can also be used
455 internal_config.base_virtaddr =
456 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
462 eal_parse_vfio_intr(const char *mode)
467 enum rte_intr_mode value;
469 { "legacy", RTE_INTR_MODE_LEGACY },
470 { "msi", RTE_INTR_MODE_MSI },
471 { "msix", RTE_INTR_MODE_MSIX },
474 for (i = 0; i < RTE_DIM(map); i++) {
475 if (!strcmp(mode, map[i].name)) {
476 internal_config.vfio_intr_mode = map[i].value;
484 eal_get_hugepage_mem_size(void)
489 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
490 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
491 if (hpi->hugedir != NULL) {
492 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
493 size += hpi->hugepage_sz * hpi->num_pages[j];
498 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
501 /* Parse the arguments for --log-level only */
503 eal_log_level_parse(int argc, char **argv)
511 eal_reset_internal_config(&internal_config);
513 while ((opt = getopt_long(argc, argvopt, eal_short_options,
514 eal_long_options, &option_index)) != EOF) {
518 /* getopt is not happy, stop right now */
522 ret = (opt == OPT_LOG_LEVEL_NUM) ?
523 eal_parse_common_option(opt, optarg, &internal_config) : 0;
525 /* common parser is not happy */
530 optind = 0; /* reset getopt lib */
533 /* Parse the argument given in the command line of the application */
535 eal_parse_args(int argc, char **argv)
540 char *prgname = argv[0];
541 struct shared_driver *solib;
545 while ((opt = getopt_long(argc, argvopt, eal_short_options,
546 eal_long_options, &option_index)) != EOF) {
550 /* getopt is not happy, stop right now */
556 ret = eal_parse_common_option(opt, optarg, &internal_config);
557 /* common parser is not happy */
562 /* common parser handled this option */
571 /* force loading of external driver */
573 solib = malloc(sizeof(*solib));
575 RTE_LOG(ERR, EAL, "malloc(solib) failed\n");
578 memset(solib, 0, sizeof(*solib));
579 strncpy(solib->name, optarg, PATH_MAX-1);
580 solib->name[PATH_MAX-1] = 0;
581 TAILQ_INSERT_TAIL(&solib_list, solib, next);
585 case OPT_XEN_DOM0_NUM:
586 #ifdef RTE_LIBRTE_XEN_DOM0
587 internal_config.xen_dom0_support = 1;
589 RTE_LOG(ERR, EAL, "Can't support DPDK app "
590 "running on Dom0, please configure"
591 " RTE_LIBRTE_XEN_DOM0=y\n");
596 case OPT_HUGE_DIR_NUM:
597 internal_config.hugepage_dir = optarg;
600 case OPT_FILE_PREFIX_NUM:
601 internal_config.hugefile_prefix = optarg;
604 case OPT_SOCKET_MEM_NUM:
605 if (eal_parse_socket_mem(optarg) < 0) {
606 RTE_LOG(ERR, EAL, "invalid parameters for --"
607 OPT_SOCKET_MEM "\n");
613 case OPT_BASE_VIRTADDR_NUM:
614 if (eal_parse_base_virtaddr(optarg) < 0) {
615 RTE_LOG(ERR, EAL, "invalid parameter for --"
616 OPT_BASE_VIRTADDR "\n");
622 case OPT_VFIO_INTR_NUM:
623 if (eal_parse_vfio_intr(optarg) < 0) {
624 RTE_LOG(ERR, EAL, "invalid parameters for --"
631 case OPT_CREATE_UIO_DEV_NUM:
632 internal_config.create_uio_dev = 1;
636 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
637 RTE_LOG(ERR, EAL, "Option %c is not supported "
639 } else if (opt >= OPT_LONG_MIN_NUM &&
640 opt < OPT_LONG_MAX_NUM) {
641 RTE_LOG(ERR, EAL, "Option %s is not supported "
643 eal_long_options[option_index].name);
645 RTE_LOG(ERR, EAL, "Option %d is not supported "
653 if (eal_adjust_config(&internal_config) != 0)
657 if (eal_check_common_options(&internal_config) != 0) {
662 /* --xen-dom0 doesn't make sense with --socket-mem */
663 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
664 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
665 "together with --"OPT_XEN_DOM0"\n");
671 argv[optind-1] = prgname;
673 optind = 0; /* reset getopt lib */
678 eal_check_mem_on_local_socket(void)
680 const struct rte_memseg *ms;
683 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
685 ms = rte_eal_get_physmem_layout();
687 for (i = 0; i < RTE_MAX_MEMSEG; i++)
688 if (ms[i].socket_id == socket_id &&
692 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
693 "memory on local socket!\n");
697 sync_func(__attribute__((unused)) void *arg)
703 rte_eal_mcfg_complete(void)
705 /* ALL shared mem_config related INIT DONE */
706 if (rte_config.process_type == RTE_PROC_PRIMARY)
707 rte_config.mem_config->magic = RTE_MAGIC;
711 * Request iopl privilege for all RPL, returns 0 on success
712 * iopl() call is mostly for the i386 architecture. For other architectures,
713 * return -1 to indicate IO privilege can't be changed in this way.
716 rte_eal_iopl_init(void)
718 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
727 /* Launch threads, called at application init(). */
729 rte_eal_init(int argc, char **argv)
733 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
734 struct shared_driver *solib = NULL;
736 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
738 if (!rte_atomic32_test_and_set(&run_once))
741 logid = strrchr(argv[0], '/');
742 logid = strdup(logid ? logid + 1: argv[0]);
744 thread_id = pthread_self();
746 if (rte_eal_log_early_init() < 0)
747 rte_panic("Cannot init early logs\n");
749 eal_log_level_parse(argc, argv);
751 /* set log level as early as possible */
752 rte_set_log_level(internal_config.log_level);
754 if (rte_eal_cpu_init() < 0)
755 rte_panic("Cannot detect lcores\n");
757 fctret = eal_parse_args(argc, argv);
761 if (internal_config.no_hugetlbfs == 0 &&
762 internal_config.process_type != RTE_PROC_SECONDARY &&
763 internal_config.xen_dom0_support == 0 &&
764 eal_hugepage_info_init() < 0)
765 rte_panic("Cannot get hugepage information\n");
767 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
768 if (internal_config.no_hugetlbfs)
769 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
771 internal_config.memory = eal_get_hugepage_mem_size();
774 if (internal_config.vmware_tsc_map == 1) {
775 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
776 rte_cycles_vmware_tsc_map = 1;
777 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
778 "you must have monitor_control.pseudo_perfctr = TRUE\n");
780 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
781 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
785 rte_srand(rte_rdtsc());
789 if (rte_eal_pci_init() < 0)
790 rte_panic("Cannot init PCI\n");
792 #ifdef RTE_LIBRTE_IVSHMEM
793 if (rte_eal_ivshmem_init() < 0)
794 rte_panic("Cannot init IVSHMEM\n");
797 if (rte_eal_memory_init() < 0)
798 rte_panic("Cannot init memory\n");
800 /* the directories are locked during eal_hugepage_info_init */
801 eal_hugedirs_unlock();
803 if (rte_eal_memzone_init() < 0)
804 rte_panic("Cannot init memzone\n");
806 if (rte_eal_tailqs_init() < 0)
807 rte_panic("Cannot init tail queues for objects\n");
809 #ifdef RTE_LIBRTE_IVSHMEM
810 if (rte_eal_ivshmem_obj_init() < 0)
811 rte_panic("Cannot init IVSHMEM objects\n");
814 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
815 rte_panic("Cannot init logs\n");
817 if (rte_eal_alarm_init() < 0)
818 rte_panic("Cannot init interrupt-handling thread\n");
820 if (rte_eal_intr_init() < 0)
821 rte_panic("Cannot init interrupt-handling thread\n");
823 if (rte_eal_timer_init() < 0)
824 rte_panic("Cannot init HPET or TSC timers\n");
826 eal_check_mem_on_local_socket();
828 rte_eal_mcfg_complete();
830 TAILQ_FOREACH(solib, &solib_list, next) {
831 RTE_LOG(DEBUG, EAL, "open shared lib %s\n", solib->name);
832 solib->lib_handle = dlopen(solib->name, RTLD_NOW);
833 if (solib->lib_handle == NULL)
834 RTE_LOG(WARNING, EAL, "%s\n", dlerror());
837 eal_thread_init_master(rte_config.master_lcore);
839 ret = eal_thread_dump_affinity(cpuset, RTE_CPU_AFFINITY_STR_LEN);
841 RTE_LOG(DEBUG, EAL, "Master lcore %u is ready (tid=%x;cpuset=[%s%s])\n",
842 rte_config.master_lcore, (int)thread_id, cpuset,
843 ret == 0 ? "" : "...");
845 if (rte_eal_dev_init() < 0)
846 rte_panic("Cannot init pmd devices\n");
848 RTE_LCORE_FOREACH_SLAVE(i) {
851 * create communication pipes between master thread
854 if (pipe(lcore_config[i].pipe_master2slave) < 0)
855 rte_panic("Cannot create pipe\n");
856 if (pipe(lcore_config[i].pipe_slave2master) < 0)
857 rte_panic("Cannot create pipe\n");
859 lcore_config[i].state = WAIT;
861 /* create a thread for each lcore */
862 ret = pthread_create(&lcore_config[i].thread_id, NULL,
863 eal_thread_loop, NULL);
865 rte_panic("Cannot create thread\n");
869 * Launch a dummy function on all slave lcores, so that master lcore
870 * knows they are all ready when this function returns.
872 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
873 rte_eal_mp_wait_lcore();
875 /* Probe & Initialize PCI devices */
876 if (rte_eal_pci_probe())
877 rte_panic("Cannot probe PCI\n");
883 enum rte_lcore_role_t
884 rte_eal_lcore_role(unsigned lcore_id)
886 return rte_config.lcore_role[lcore_id];
890 rte_eal_process_type(void)
892 return rte_config.process_type;
895 int rte_eal_has_hugepages(void)
897 return ! internal_config.no_hugetlbfs;
901 rte_eal_check_module(const char *module_name)
903 char mod_name[30]; /* Any module names can be longer than 30 bytes? */
907 if (NULL == module_name)
910 FILE *fd = fopen("/proc/modules", "r");
912 RTE_LOG(ERR, EAL, "Open /proc/modules failed!"
913 " error %i (%s)\n", errno, strerror(errno));
917 n = fscanf(fd, "%29s %*[^\n]", mod_name);
918 if ((n == 1) && !strcmp(mod_name, module_name)) {