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
16 * the documentation and/or other materials provided with the
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19 * contributors may be used to endorse or promote products derived
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 #include <sys/queue.h>
55 #include <rte_common.h>
56 #include <rte_debug.h>
57 #include <rte_memory.h>
58 #include <rte_memzone.h>
59 #include <rte_launch.h>
60 #include <rte_tailq.h>
62 #include <rte_eal_memconfig.h>
63 #include <rte_per_lcore.h>
64 #include <rte_lcore.h>
66 #include <rte_random.h>
67 #include <rte_cycles.h>
68 #include <rte_string_fns.h>
69 #include <rte_cpuflags.h>
70 #include <rte_interrupts.h>
72 #include <rte_devargs.h>
73 #include <rte_common.h>
74 #include <rte_version.h>
75 #include <rte_atomic.h>
76 #include <malloc_heap.h>
77 #include <rte_eth_ring.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 */
287 static enum rte_proc_type_t
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 == RTE_PROC_AUTO) ?
311 eal_proc_type_detect() : /* for auto, detect the type */
312 internal_config.process_type; /* otherwise use what's already set */
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 */
451 #ifndef RTE_ARCH_X86_64
452 if (addr >= UINTPTR_MAX)
456 /* align the addr on 2M boundary */
457 internal_config.base_virtaddr = RTE_PTR_ALIGN_CEIL((uintptr_t)addr,
464 eal_parse_vfio_intr(const char *mode)
469 enum rte_intr_mode value;
471 { "legacy", RTE_INTR_MODE_LEGACY },
472 { "msi", RTE_INTR_MODE_MSI },
473 { "msix", RTE_INTR_MODE_MSIX },
476 for (i = 0; i < RTE_DIM(map); i++) {
477 if (!strcmp(mode, map[i].name)) {
478 internal_config.vfio_intr_mode = map[i].value;
486 eal_get_hugepage_mem_size(void)
491 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
492 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
493 if (hpi->hugedir != NULL) {
494 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
495 size += hpi->hugepage_sz * hpi->num_pages[j];
500 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
503 /* Parse the argument given in the command line of the application */
505 eal_parse_args(int argc, char **argv)
510 char *prgname = argv[0];
511 struct shared_driver *solib;
515 eal_reset_internal_config(&internal_config);
517 while ((opt = getopt_long(argc, argvopt, eal_short_options,
518 eal_long_options, &option_index)) != EOF) {
522 /* getopt is not happy, stop right now */
526 ret = eal_parse_common_option(opt, optarg, &internal_config);
527 /* common parser is not happy */
532 /* common parser handled this option */
537 /* force loading of external driver */
539 solib = malloc(sizeof(*solib));
541 RTE_LOG(ERR, EAL, "malloc(solib) failed\n");
544 memset(solib, 0, sizeof(*solib));
545 strncpy(solib->name, optarg, PATH_MAX-1);
546 solib->name[PATH_MAX-1] = 0;
547 TAILQ_INSERT_TAIL(&solib_list, solib, next);
551 case OPT_XEN_DOM0_NUM:
552 #ifdef RTE_LIBRTE_XEN_DOM0
553 internal_config.xen_dom0_support = 1;
555 RTE_LOG(ERR, EAL, "Can't support DPDK app "
556 "running on Dom0, please configure"
557 " 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");
579 case OPT_BASE_VIRTADDR_NUM:
580 if (eal_parse_base_virtaddr(optarg) < 0) {
581 RTE_LOG(ERR, EAL, "invalid parameter for --"
582 OPT_BASE_VIRTADDR "\n");
588 case OPT_VFIO_INTR_NUM:
589 if (eal_parse_vfio_intr(optarg) < 0) {
590 RTE_LOG(ERR, EAL, "invalid parameters for --"
597 case OPT_CREATE_UIO_DEV_NUM:
598 internal_config.create_uio_dev = 1;
602 if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
603 RTE_LOG(ERR, EAL, "Option %c is not supported "
605 } else if (opt >= OPT_LONG_MIN_NUM &&
606 opt < OPT_LONG_MAX_NUM) {
607 RTE_LOG(ERR, EAL, "Option %s is not supported "
609 eal_long_options[option_index].name);
611 RTE_LOG(ERR, EAL, "Option %d is not supported "
619 if (internal_config.process_type == RTE_PROC_AUTO)
620 internal_config.process_type = eal_proc_type_detect();
623 if (eal_check_common_options(&internal_config) != 0) {
628 /* --xen-dom0 doesn't make sense with --socket-mem */
629 if (internal_config.xen_dom0_support && internal_config.force_sockets == 1) {
630 RTE_LOG(ERR, EAL, "Options --"OPT_SOCKET_MEM" cannot be specified "
631 "together with --"OPT_XEN_DOM0"\n");
637 argv[optind-1] = prgname;
639 /* if no memory amounts were requested, this will result in 0 and
640 * will be overriden later, right after eal_hugepage_info_init() */
641 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
642 internal_config.memory += internal_config.socket_mem[i];
645 optind = 0; /* reset getopt lib */
650 eal_check_mem_on_local_socket(void)
652 const struct rte_memseg *ms;
655 socket_id = rte_lcore_to_socket_id(rte_config.master_lcore);
657 ms = rte_eal_get_physmem_layout();
659 for (i = 0; i < RTE_MAX_MEMSEG; i++)
660 if (ms[i].socket_id == socket_id &&
664 RTE_LOG(WARNING, EAL, "WARNING: Master core has no "
665 "memory on local socket!\n");
669 sync_func(__attribute__((unused)) void *arg)
675 rte_eal_mcfg_complete(void)
677 /* ALL shared mem_config related INIT DONE */
678 if (rte_config.process_type == RTE_PROC_PRIMARY)
679 rte_config.mem_config->magic = RTE_MAGIC;
683 * Request iopl privilege for all RPL, returns 0 on success
686 rte_eal_iopl_init(void)
693 /* Launch threads, called at application init(). */
695 rte_eal_init(int argc, char **argv)
699 static rte_atomic32_t run_once = RTE_ATOMIC32_INIT(0);
700 struct shared_driver *solib = NULL;
703 if (!rte_atomic32_test_and_set(&run_once))
706 logid = strrchr(argv[0], '/');
707 logid = strdup(logid ? logid + 1: argv[0]);
709 thread_id = pthread_self();
711 if (rte_eal_log_early_init() < 0)
712 rte_panic("Cannot init early logs\n");
714 if (rte_eal_cpu_init() < 0)
715 rte_panic("Cannot detect lcores\n");
717 fctret = eal_parse_args(argc, argv);
721 /* set log level as early as possible */
722 rte_set_log_level(internal_config.log_level);
724 if (internal_config.no_hugetlbfs == 0 &&
725 internal_config.process_type != RTE_PROC_SECONDARY &&
726 internal_config.xen_dom0_support == 0 &&
727 eal_hugepage_info_init() < 0)
728 rte_panic("Cannot get hugepage information\n");
730 if (internal_config.memory == 0 && internal_config.force_sockets == 0) {
731 if (internal_config.no_hugetlbfs)
732 internal_config.memory = MEMSIZE_IF_NO_HUGE_PAGE;
734 internal_config.memory = eal_get_hugepage_mem_size();
737 if (internal_config.vmware_tsc_map == 1) {
738 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
739 rte_cycles_vmware_tsc_map = 1;
740 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
741 "you must have monitor_control.pseudo_perfctr = TRUE\n");
743 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
744 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
748 rte_srand(rte_rdtsc());
752 if (rte_eal_pci_init() < 0)
753 rte_panic("Cannot init PCI\n");
755 #ifdef RTE_LIBRTE_IVSHMEM
756 if (rte_eal_ivshmem_init() < 0)
757 rte_panic("Cannot init IVSHMEM\n");
760 if (rte_eal_memory_init() < 0)
761 rte_panic("Cannot init memory\n");
763 /* the directories are locked during eal_hugepage_info_init */
764 eal_hugedirs_unlock();
766 if (rte_eal_memzone_init() < 0)
767 rte_panic("Cannot init memzone\n");
769 if (rte_eal_tailqs_init() < 0)
770 rte_panic("Cannot init tail queues for objects\n");
772 #ifdef RTE_LIBRTE_IVSHMEM
773 if (rte_eal_ivshmem_obj_init() < 0)
774 rte_panic("Cannot init IVSHMEM objects\n");
777 if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0)
778 rte_panic("Cannot init logs\n");
780 if (rte_eal_alarm_init() < 0)
781 rte_panic("Cannot init interrupt-handling thread\n");
783 if (rte_eal_intr_init() < 0)
784 rte_panic("Cannot init interrupt-handling thread\n");
786 if (rte_eal_timer_init() < 0)
787 rte_panic("Cannot init HPET or TSC timers\n");
789 eal_check_mem_on_local_socket();
791 rte_eal_mcfg_complete();
793 TAILQ_FOREACH(solib, &solib_list, next) {
794 RTE_LOG(INFO, EAL, "open shared lib %s\n", solib->name);
795 solib->lib_handle = dlopen(solib->name, RTLD_NOW);
796 if (solib->lib_handle == NULL)
797 RTE_LOG(WARNING, EAL, "%s\n", dlerror());
800 eal_thread_init_master(rte_config.master_lcore);
802 RTE_LOG(DEBUG, EAL, "Master core %u is ready (tid=%x)\n",
803 rte_config.master_lcore, (int)thread_id);
805 if (rte_eal_dev_init() < 0)
806 rte_panic("Cannot init pmd devices\n");
808 RTE_LCORE_FOREACH_SLAVE(i) {
811 * create communication pipes between master thread
814 if (pipe(lcore_config[i].pipe_master2slave) < 0)
815 rte_panic("Cannot create pipe\n");
816 if (pipe(lcore_config[i].pipe_slave2master) < 0)
817 rte_panic("Cannot create pipe\n");
819 lcore_config[i].state = WAIT;
821 /* create a thread for each lcore */
822 ret = pthread_create(&lcore_config[i].thread_id, NULL,
823 eal_thread_loop, NULL);
825 rte_panic("Cannot create thread\n");
829 * Launch a dummy function on all slave lcores, so that master lcore
830 * knows they are all ready when this function returns.
832 rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
833 rte_eal_mp_wait_lcore();
835 /* Probe & Initialize PCI devices */
836 if (rte_eal_pci_probe())
837 rte_panic("Cannot probe PCI\n");
843 enum rte_lcore_role_t
844 rte_eal_lcore_role(unsigned lcore_id)
846 return (rte_config.lcore_role[lcore_id]);
850 rte_eal_process_type(void)
852 return (rte_config.process_type);
855 int rte_eal_has_hugepages(void)
857 return ! internal_config.no_hugetlbfs;