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>
62 #include <rte_tailq.h>
64 #include <rte_eal_memconfig.h>
65 #include <rte_per_lcore.h>
66 #include <rte_lcore.h>
68 #include <rte_random.h>
69 #include <rte_cycles.h>
70 #include <rte_string_fns.h>
71 #include <rte_cpuflags.h>
72 #include <rte_interrupts.h>
74 #include <rte_devargs.h>
75 #include <rte_common.h>
76 #include <rte_version.h>
77 #include <rte_atomic.h>
78 #include <malloc_heap.h>
79 #include <rte_eth_ring.h>
81 #include "eal_private.h"
82 #include "eal_thread.h"
83 #include "eal_internal_cfg.h"
84 #include "eal_filesystem.h"
85 #include "eal_hugepages.h"
86 #include "eal_options.h"
88 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
90 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
92 /* Allow the application to print its usage message too if set */
93 static rte_usage_hook_t rte_application_usage_hook = NULL;
95 TAILQ_HEAD(shared_driver_list, shared_driver);
97 /* Definition for shared object drivers. */
98 struct shared_driver {
99 TAILQ_ENTRY(shared_driver) next;
105 /* List of external loadable drivers */
106 static struct shared_driver_list solib_list =
107 TAILQ_HEAD_INITIALIZER(solib_list);
109 /* early configuration structure, when memory config is not mmapped */
110 static struct rte_mem_config early_mem_config;
112 /* define fd variable here, because file needs to be kept open for the
113 * duration of the program, as we hold a write lock on it in the primary proc */
114 static int mem_cfg_fd = -1;
116 static struct flock wr_lock = {
118 .l_whence = SEEK_SET,
119 .l_start = offsetof(struct rte_mem_config, memseg),
120 .l_len = sizeof(early_mem_config.memseg),
123 /* Address of global and public configuration */
124 static struct rte_config rte_config = {
125 .mem_config = &early_mem_config,
128 /* internal configuration (per-core) */
129 struct lcore_config lcore_config[RTE_MAX_LCORE];
131 /* internal configuration */
132 struct internal_config internal_config;
134 /* used by rte_rdtsc() */
135 int rte_cycles_vmware_tsc_map;
137 /* Return a pointer to the configuration structure */
139 rte_eal_get_configuration(void)
144 /* parse a sysfs (or other) file containing one integer value */
146 eal_parse_sysfs_value(const char *filename, unsigned long *val)
152 if ((f = fopen(filename, "r")) == NULL) {
153 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
158 if (fgets(buf, sizeof(buf), f) == NULL) {
159 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
164 *val = strtoul(buf, &end, 0);
165 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
166 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
176 /* create memory configuration in shared/mmap memory. Take out
177 * a write lock on the memsegs, so we can auto-detect primary/secondary.
178 * This means we never close the file while running (auto-close on exit).
179 * We also don't lock the whole file, so that in future we can use read-locks
180 * on other parts, e.g. memzones, to detect if there are running secondary
183 rte_eal_config_create(void)
185 void *rte_mem_cfg_addr;
188 const char *pathname = eal_runtime_config_path();
190 if (internal_config.no_shconf)
193 /* map the config before hugepage address so that we don't waste a page */
194 if (internal_config.base_virtaddr != 0)
195 rte_mem_cfg_addr = (void *)
196 RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
197 sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
199 rte_mem_cfg_addr = NULL;
202 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
204 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
207 retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
210 rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
213 retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
216 rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
217 "process running?\n", pathname);
220 rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
221 PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
223 if (rte_mem_cfg_addr == MAP_FAILED){
224 rte_panic("Cannot mmap memory for rte_config\n");
226 memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
227 rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;
229 /* store address of the config in the config itself so that secondary
230 * processes could later map the config into this exact location */
231 rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
235 /* attach to an existing shared memory config */
237 rte_eal_config_attach(void)
239 struct rte_mem_config *mem_config;
241 const char *pathname = eal_runtime_config_path();
243 if (internal_config.no_shconf)
247 mem_cfg_fd = open(pathname, O_RDWR);
249 rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
252 /* map it as read-only first */
253 mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
254 PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
255 if (mem_config == MAP_FAILED)
256 rte_panic("Cannot mmap memory for rte_config\n");
258 rte_config.mem_config = mem_config;
261 /* reattach the shared config at exact memory location primary process has it */
263 rte_eal_config_reattach(void)
265 struct rte_mem_config *mem_config;
266 void *rte_mem_cfg_addr;
268 if (internal_config.no_shconf)
271 /* save the address primary process has mapped shared config to */
272 rte_mem_cfg_addr = (void *) (uintptr_t) rte_config.mem_config->mem_cfg_addr;
274 /* unmap original config */
275 munmap(rte_config.mem_config, sizeof(struct rte_mem_config));
277 /* remap the config at proper address */
278 mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
279 sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
282 if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr)
283 rte_panic("Cannot mmap memory for rte_config\n");
285 rte_config.mem_config = mem_config;
288 /* Detect if we are a primary or a secondary process */
290 eal_proc_type_detect(void)
292 enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
293 const char *pathname = eal_runtime_config_path();
295 /* if we can open the file but not get a write-lock we are a secondary
296 * process. NOTE: if we get a file handle back, we keep that open
297 * and don't close it to prevent a race condition between multiple opens */
298 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
299 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
300 ptype = RTE_PROC_SECONDARY;
302 RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
303 ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
308 /* Sets up rte_config structure with the pointer to shared memory config.*/
310 rte_config_init(void)
312 rte_config.process_type = internal_config.process_type;
314 switch (rte_config.process_type){
315 case RTE_PROC_PRIMARY:
316 rte_eal_config_create();
318 case RTE_PROC_SECONDARY:
319 rte_eal_config_attach();
320 rte_eal_mcfg_wait_complete(rte_config.mem_config);
321 rte_eal_config_reattach();
324 case RTE_PROC_INVALID:
325 rte_panic("Invalid process type\n");
329 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
331 eal_hugedirs_unlock(void)
335 for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
337 /* skip uninitialized */
338 if (internal_config.hugepage_info[i].lock_descriptor < 0)
340 /* unlock hugepage file */
341 flock(internal_config.hugepage_info[i].lock_descriptor, LOCK_UN);
342 close(internal_config.hugepage_info[i].lock_descriptor);
343 /* reset the field */
344 internal_config.hugepage_info[i].lock_descriptor = -1;
350 eal_usage(const char *prgname)
352 printf("\nUsage: %s ", prgname);
354 printf("EAL Linux options:\n"
355 " -d LIB.so : add driver (can be used multiple times)\n"
356 " --"OPT_XEN_DOM0" : support application running on Xen Domain0 "
357 "without hugetlbfs\n"
358 " --"OPT_SOCKET_MEM" : memory to allocate on specific\n"
359 " sockets (use comma separated values)\n"
360 " --"OPT_HUGE_DIR" : directory where hugetlbfs is mounted\n"
361 " --"OPT_FILE_PREFIX": prefix for hugepage filenames\n"
362 " --"OPT_BASE_VIRTADDR": specify base virtual address\n"
363 " --"OPT_VFIO_INTR": specify desired interrupt mode for VFIO "
364 "(legacy|msi|msix)\n"
365 " --"OPT_CREATE_UIO_DEV": create /dev/uioX (usually done by hotplug)\n"
367 /* Allow the application to print its usage message too if hook is set */
368 if ( rte_application_usage_hook ) {
369 printf("===== Application Usage =====\n\n");
370 rte_application_usage_hook(prgname);
374 /* Set a per-application usage message */
376 rte_set_application_usage_hook( rte_usage_hook_t usage_func )
378 rte_usage_hook_t old_func;
380 /* Will be NULL on the first call to denote the last usage routine. */
381 old_func = rte_application_usage_hook;
382 rte_application_usage_hook = usage_func;
388 eal_parse_socket_mem(char *socket_mem)
390 char * arg[RTE_MAX_NUMA_NODES];
393 uint64_t total_mem = 0;
395 len = strnlen(socket_mem, SOCKET_MEM_STRLEN);
396 if (len == SOCKET_MEM_STRLEN) {
397 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
401 /* all other error cases will be caught later */
402 if (!isdigit(socket_mem[len-1]))
405 /* split the optarg into separate socket values */
406 arg_num = rte_strsplit(socket_mem, len,
407 arg, RTE_MAX_NUMA_NODES, ',');
409 /* if split failed, or 0 arguments */
413 internal_config.force_sockets = 1;
415 /* parse each defined socket option */
417 for (i = 0; i < arg_num; i++) {
419 internal_config.socket_mem[i] = strtoull(arg[i], &end, 10);
421 /* check for invalid input */
423 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
425 internal_config.socket_mem[i] *= 1024ULL;
426 internal_config.socket_mem[i] *= 1024ULL;
427 total_mem += internal_config.socket_mem[i];
430 /* check if we have a positive amount of total memory */
438 eal_parse_base_virtaddr(const char *arg)
444 addr = strtoull(arg, &end, 16);
446 /* check for errors */
447 if ((errno != 0) || (arg[0] == '\0') || end == NULL || (*end != '\0'))
450 /* make sure we don't exceed 32-bit boundary on 32-bit target */
452 if (addr >= UINTPTR_MAX)
456 /* align the addr on 16M boundary, 16MB is the minimum huge page
457 * size on IBM Power architecture. If the addr is aligned to 16MB,
458 * it can align to 2MB for x86. So this alignment can also be used
460 internal_config.base_virtaddr =
461 RTE_PTR_ALIGN_CEIL((uintptr_t)addr, (size_t)RTE_PGSIZE_16M);
467 eal_parse_vfio_intr(const char *mode)
472 enum rte_intr_mode value;
474 { "legacy", RTE_INTR_MODE_LEGACY },
475 { "msi", RTE_INTR_MODE_MSI },
476 { "msix", RTE_INTR_MODE_MSIX },
479 for (i = 0; i < RTE_DIM(map); i++) {
480 if (!strcmp(mode, map[i].name)) {
481 internal_config.vfio_intr_mode = map[i].value;
489 eal_get_hugepage_mem_size(void)
494 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
495 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
496 if (hpi->hugedir != NULL) {
497 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
498 size += hpi->hugepage_sz * hpi->num_pages[j];
503 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
506 /* Parse the argument given in the command line of the application */
508 eal_parse_args(int argc, char **argv)
513 char *prgname = argv[0];
514 struct shared_driver *solib;
518 eal_reset_internal_config(&internal_config);
520 while ((opt = getopt_long(argc, argvopt, eal_short_options,
521 eal_long_options, &option_index)) != EOF) {
525 /* getopt is not happy, stop right now */
529 ret = eal_parse_common_option(opt, optarg, &internal_config);
530 /* common parser is not happy */
535 /* common parser handled this option */
540 /* force loading of external driver */
542 solib = malloc(sizeof(*solib));
544 RTE_LOG(ERR, EAL, "malloc(solib) failed\n");
547 memset(solib, 0, sizeof(*solib));
548 strncpy(solib->name, optarg, PATH_MAX-1);
549 solib->name[PATH_MAX-1] = 0;
550 TAILQ_INSERT_TAIL(&solib_list, solib, next);
554 case OPT_XEN_DOM0_NUM:
555 #ifdef RTE_LIBRTE_XEN_DOM0
556 internal_config.xen_dom0_support = 1;
558 RTE_LOG(ERR, EAL, "Can't support DPDK app "
559 "running on Dom0, please configure"
560 " RTE_LIBRTE_XEN_DOM0=y\n");
565 case OPT_HUGE_DIR_NUM:
566 internal_config.hugepage_dir = optarg;
569 case OPT_FILE_PREFIX_NUM:
570 internal_config.hugefile_prefix = optarg;
573 case OPT_SOCKET_MEM_NUM:
574 if (eal_parse_socket_mem(optarg) < 0) {
575 RTE_LOG(ERR, EAL, "invalid parameters for --"
576 OPT_SOCKET_MEM "\n");
582 case OPT_BASE_VIRTADDR_NUM:
583 if (eal_parse_base_virtaddr(optarg) < 0) {
584 RTE_LOG(ERR, EAL, "invalid parameter for --"
585 OPT_BASE_VIRTADDR "\n");
591 case OPT_VFIO_INTR_NUM:
592 if (eal_parse_vfio_intr(optarg) < 0) {
593 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 "
622 if (eal_adjust_config(&internal_config) != 0)
626 if (eal_check_common_options(&internal_config) != 0) {
631 /* --xen-dom0 doesn't make sense with --socket-mem */
632 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
633 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
634 "together with --"OPT_XEN_DOM0"\n");
640 argv[optind-1] = prgname;
642 optind = 0; /* reset getopt lib */
647 eal_check_mem_on_local_socket(void)
649 const struct rte_memseg *ms;
652 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
654 ms = rte_eal_get_physmem_layout();
656 for (i = 0; i < RTE_MAX_MEMSEG; i++)
657 if (ms[i].socket_id == socket_id &&
661 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
662 "memory on local socket!\n");
666 sync_func(__attribute__((unused)) void *arg)
672 rte_eal_mcfg_complete(void)
674 /* ALL shared mem_config related INIT DONE */
675 if (rte_config.process_type == RTE_PROC_PRIMARY)
676 rte_config.mem_config->magic = RTE_MAGIC;
680 * Request iopl privilege for all RPL, returns 0 on success
681 * iopl() call is mostly for the i386 architecture. For other architectures,
682 * return -1 to indicate IO privilege can't be changed in this way.
685 rte_eal_iopl_init(void)
687 #if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
696 /* Launch threads, called at application init(). */
698 rte_eal_init(int argc, char **argv)
702 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
703 struct shared_driver *solib = NULL;
706 if (!rte_atomic32_test_and_set(&run_once))
709 logid = strrchr(argv[0], '/');
710 logid = strdup(logid ? logid + 1: argv[0]);
712 thread_id = pthread_self();
714 if (rte_eal_log_early_init() < 0)
715 rte_panic("Cannot init early logs\n");
717 if (rte_eal_cpu_init() < 0)
718 rte_panic("Cannot detect lcores\n");
720 fctret = eal_parse_args(argc, argv);
724 /* set log level as early as possible */
725 rte_set_log_level(internal_config.log_level);
727 if (internal_config.no_hugetlbfs == 0 &&
728 internal_config.process_type != RTE_PROC_SECONDARY &&
729 internal_config.xen_dom0_support == 0 &&
730 eal_hugepage_info_init() < 0)
731 rte_panic("Cannot get hugepage information\n");
733 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
734 if (internal_config.no_hugetlbfs)
735 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
737 internal_config.memory = eal_get_hugepage_mem_size();
740 if (internal_config.vmware_tsc_map == 1) {
741 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
742 rte_cycles_vmware_tsc_map = 1;
743 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
744 "you must have monitor_control.pseudo_perfctr = TRUE\n");
746 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
747 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
751 rte_srand(rte_rdtsc());
755 if (rte_eal_pci_init() < 0)
756 rte_panic("Cannot init PCI\n");
758 #ifdef RTE_LIBRTE_IVSHMEM
759 if (rte_eal_ivshmem_init() < 0)
760 rte_panic("Cannot init IVSHMEM\n");
763 if (rte_eal_memory_init() < 0)
764 rte_panic("Cannot init memory\n");
766 /* the directories are locked during eal_hugepage_info_init */
767 eal_hugedirs_unlock();
769 if (rte_eal_memzone_init() < 0)
770 rte_panic("Cannot init memzone\n");
772 if (rte_eal_tailqs_init() < 0)
773 rte_panic("Cannot init tail queues for objects\n");
775 #ifdef RTE_LIBRTE_IVSHMEM
776 if (rte_eal_ivshmem_obj_init() < 0)
777 rte_panic("Cannot init IVSHMEM objects\n");
780 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
781 rte_panic("Cannot init logs\n");
783 if (rte_eal_alarm_init() < 0)
784 rte_panic("Cannot init interrupt-handling thread\n");
786 if (rte_eal_intr_init() < 0)
787 rte_panic("Cannot init interrupt-handling thread\n");
789 if (rte_eal_timer_init() < 0)
790 rte_panic("Cannot init HPET or TSC timers\n");
792 eal_check_mem_on_local_socket();
794 rte_eal_mcfg_complete();
796 TAILQ_FOREACH(solib, &solib_list, next) {
797 RTE_LOG(INFO, EAL, "open shared lib %s\n", solib->name);
798 solib->lib_handle = dlopen(solib->name, RTLD_NOW);
799 if (solib->lib_handle == NULL)
800 RTE_LOG(WARNING, EAL, "%s\n", dlerror());
803 eal_thread_init_master(rte_config.master_lcore);
805 RTE_LOG(DEBUG, EAL, "Master core %u is ready (tid=%x)\n",
806 rte_config.master_lcore, (int)thread_id);
808 if (rte_eal_dev_init() < 0)
809 rte_panic("Cannot init pmd devices\n");
811 RTE_LCORE_FOREACH_SLAVE(i) {
814 * create communication pipes between master thread
817 if (pipe(lcore_config[i].pipe_master2slave) < 0)
818 rte_panic("Cannot create pipe\n");
819 if (pipe(lcore_config[i].pipe_slave2master) < 0)
820 rte_panic("Cannot create pipe\n");
822 lcore_config[i].state = WAIT;
824 /* create a thread for each lcore */
825 ret = pthread_create(&lcore_config[i].thread_id, NULL,
826 eal_thread_loop, NULL);
828 rte_panic("Cannot create thread\n");
832 * Launch a dummy function on all slave lcores, so that master lcore
833 * knows they are all ready when this function returns.
835 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
836 rte_eal_mp_wait_lcore();
838 /* Probe & Initialize PCI devices */
839 if (rte_eal_pci_probe())
840 rte_panic("Cannot probe PCI\n");
846 enum rte_lcore_role_t
847 rte_eal_lcore_role(unsigned lcore_id)
849 return (rte_config.lcore_role[lcore_id]);
853 rte_eal_process_type(void)
855 return (rte_config.process_type);
858 int rte_eal_has_hugepages(void)
860 return ! internal_config.no_hugetlbfs;
864 rte_eal_check_module(const char *module_name)
866 char mod_name[30]; /* Any module names can be longer than 30 bytes? */
870 if (NULL == module_name)
873 FILE *fd = fopen("/proc/modules", "r");
875 RTE_LOG(ERR, EAL, "Open /proc/modules failed!"
876 " error %i (%s)\n", errno, strerror(errno));
880 n = fscanf(fd, "%29s %*[^\n]", mod_name);
881 if ((n == 1) && !strcmp(mod_name, module_name)) {