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34 #include <sys/queue.h>
42 #include <rte_memory.h>
43 #include <rte_launch.h>
45 #include <rte_eal_memconfig.h>
46 #include <rte_per_lcore.h>
47 #include <rte_lcore.h>
48 #include <rte_atomic.h>
49 #include <rte_branch_prediction.h>
51 #include <rte_string_fns.h>
52 #include <rte_debug.h>
54 #include "eal_private.h"
56 TAILQ_HEAD(rte_tailq_elem_head, rte_tailq_elem);
57 /* local tailq list */
58 static struct rte_tailq_elem_head rte_tailq_elem_head =
59 TAILQ_HEAD_INITIALIZER(rte_tailq_elem_head);
61 /* number of tailqs registered, -1 before call to rte_eal_tailqs_init */
62 static int rte_tailqs_count = -1;
64 struct rte_tailq_head *
65 rte_eal_tailq_lookup(const char *name)
68 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
73 for (i = 0; i < RTE_MAX_TAILQ; i++) {
74 if (!strncmp(name, mcfg->tailq_head[i].name,
75 RTE_TAILQ_NAMESIZE-1))
76 return &mcfg->tailq_head[i];
83 rte_dump_tailq(FILE *f)
85 struct rte_mem_config *mcfg;
88 mcfg = rte_eal_get_configuration()->mem_config;
90 rte_rwlock_read_lock(&mcfg->qlock);
91 for (i = 0; i < RTE_MAX_TAILQ; i++) {
92 const struct rte_tailq_head *tailq = &mcfg->tailq_head[i];
93 const struct rte_tailq_entry_head *head = &tailq->tailq_head;
95 fprintf(f, "Tailq %u: qname:<%s>, tqh_first:%p, tqh_last:%p\n",
96 i, tailq->name, head->tqh_first, head->tqh_last);
98 rte_rwlock_read_unlock(&mcfg->qlock);
101 static struct rte_tailq_head *
102 rte_eal_tailq_create(const char *name)
104 struct rte_tailq_head *head = NULL;
106 if (!rte_eal_tailq_lookup(name) &&
107 (rte_tailqs_count + 1 < RTE_MAX_TAILQ)) {
108 struct rte_mem_config *mcfg;
110 mcfg = rte_eal_get_configuration()->mem_config;
111 head = &mcfg->tailq_head[rte_tailqs_count];
112 snprintf(head->name, sizeof(head->name) - 1, "%s", name);
113 TAILQ_INIT(&head->tailq_head);
120 /* local register, used to store "early" tailqs before rte_eal_init() and to
121 * ensure secondary process only registers tailqs once. */
123 rte_eal_tailq_local_register(struct rte_tailq_elem *t)
125 struct rte_tailq_elem *temp;
127 TAILQ_FOREACH(temp, &rte_tailq_elem_head, next) {
128 if (!strncmp(t->name, temp->name, sizeof(temp->name)))
132 TAILQ_INSERT_TAIL(&rte_tailq_elem_head, t, next);
137 rte_eal_tailq_update(struct rte_tailq_elem *t)
139 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
140 /* primary process is the only one that creates */
141 t->head = rte_eal_tailq_create(t->name);
143 t->head = rte_eal_tailq_lookup(t->name);
148 rte_eal_tailq_register(struct rte_tailq_elem *t)
150 if (rte_eal_tailq_local_register(t) < 0) {
152 "%s tailq is already registered\n", t->name);
156 /* if a register happens after rte_eal_tailqs_init(), then we can update
158 if (rte_tailqs_count >= 0) {
159 rte_eal_tailq_update(t);
160 if (t->head == NULL) {
162 "Cannot initialize tailq: %s\n", t->name);
163 TAILQ_REMOVE(&rte_tailq_elem_head, t, next);
176 rte_eal_tailqs_init(void)
178 struct rte_tailq_elem *t;
180 rte_tailqs_count = 0;
182 TAILQ_FOREACH(t, &rte_tailq_elem_head, next) {
183 /* second part of register job for "early" tailqs, see
184 * rte_eal_tailq_register and EAL_REGISTER_TAILQ */
185 rte_eal_tailq_update(t);
186 if (t->head == NULL) {
188 "Cannot initialize tailq: %s\n", t->name);
189 /* TAILQ_REMOVE not needed, error is already fatal */
197 rte_dump_tailq(stderr);