struct mlx5_hlist_entry *entry;
uint32_t prev_gen_cnt = 0;
- MLX5_ASSERT(h && entry);
+ MLX5_ASSERT(h);
/* Use write lock directly for write-most list. */
if (!h->write_most) {
prev_gen_cnt = __atomic_load_n(&h->gen_cnt, __ATOMIC_ACQUIRE);
return entry;
}
-struct mlx5_hlist_entry *
-mlx5_hlist_lookup_ex(struct mlx5_hlist *h, uint64_t key,
- mlx5_hlist_match_callback_fn cb, void *ctx)
-{
- uint32_t idx;
- struct mlx5_hlist_head *first;
- struct mlx5_hlist_entry *node;
-
- MLX5_ASSERT(h && cb && ctx);
- idx = rte_hash_crc_8byte(key, 0) & h->mask;
- first = &h->heads[idx];
- LIST_FOREACH(node, first, next) {
- if (!cb(node, ctx))
- return node;
- }
- return NULL;
-}
-
-int
-mlx5_hlist_insert_ex(struct mlx5_hlist *h, struct mlx5_hlist_entry *entry,
- mlx5_hlist_match_callback_fn cb, void *ctx)
-{
- uint32_t idx;
- struct mlx5_hlist_head *first;
- struct mlx5_hlist_entry *node;
-
- MLX5_ASSERT(h && entry && cb && ctx);
- idx = rte_hash_crc_8byte(entry->key, 0) & h->mask;
- first = &h->heads[idx];
- /* No need to reuse the lookup function. */
- LIST_FOREACH(node, first, next) {
- if (!cb(node, ctx))
- return -EEXIST;
- }
- LIST_INSERT_HEAD(first, entry, next);
- return 0;
-}
-
int
mlx5_hlist_unregister(struct mlx5_hlist *h, struct mlx5_hlist_entry *entry)
{
mlx5_free(h);
}
+/********************* Cache list ************************/
+
+static struct mlx5_cache_entry *
+mlx5_clist_default_create_cb(struct mlx5_cache_list *list,
+ struct mlx5_cache_entry *entry __rte_unused,
+ void *ctx __rte_unused)
+{
+ return mlx5_malloc(MLX5_MEM_ZERO, list->entry_sz, 0, SOCKET_ID_ANY);
+}
+
+static void
+mlx5_clist_default_remove_cb(struct mlx5_cache_list *list __rte_unused,
+ struct mlx5_cache_entry *entry)
+{
+ mlx5_free(entry);
+}
+
+int
+mlx5_cache_list_init(struct mlx5_cache_list *list, const char *name,
+ uint32_t entry_size, void *ctx,
+ mlx5_cache_create_cb cb_create,
+ mlx5_cache_match_cb cb_match,
+ mlx5_cache_remove_cb cb_remove)
+{
+ MLX5_ASSERT(list);
+ if (!cb_match || (!cb_create ^ !cb_remove))
+ return -1;
+ if (name)
+ snprintf(list->name, sizeof(list->name), "%s", name);
+ list->entry_sz = entry_size;
+ list->ctx = ctx;
+ list->cb_create = cb_create ? cb_create : mlx5_clist_default_create_cb;
+ list->cb_match = cb_match;
+ list->cb_remove = cb_remove ? cb_remove : mlx5_clist_default_remove_cb;
+ rte_rwlock_init(&list->lock);
+ DRV_LOG(DEBUG, "Cache list %s initialized.", list->name);
+ LIST_INIT(&list->head);
+ return 0;
+}
+
+static struct mlx5_cache_entry *
+__cache_lookup(struct mlx5_cache_list *list, void *ctx, bool reuse)
+{
+ struct mlx5_cache_entry *entry;
+
+ LIST_FOREACH(entry, &list->head, next) {
+ if (list->cb_match(list, entry, ctx))
+ continue;
+ if (reuse) {
+ __atomic_add_fetch(&entry->ref_cnt, 1,
+ __ATOMIC_RELAXED);
+ DRV_LOG(DEBUG, "Cache list %s entry %p ref++: %u.",
+ list->name, (void *)entry, entry->ref_cnt);
+ }
+ break;
+ }
+ return entry;
+}
+
+static struct mlx5_cache_entry *
+cache_lookup(struct mlx5_cache_list *list, void *ctx, bool reuse)
+{
+ struct mlx5_cache_entry *entry;
+
+ rte_rwlock_read_lock(&list->lock);
+ entry = __cache_lookup(list, ctx, reuse);
+ rte_rwlock_read_unlock(&list->lock);
+ return entry;
+}
+
+struct mlx5_cache_entry *
+mlx5_cache_lookup(struct mlx5_cache_list *list, void *ctx)
+{
+ return cache_lookup(list, ctx, false);
+}
+
+struct mlx5_cache_entry *
+mlx5_cache_register(struct mlx5_cache_list *list, void *ctx)
+{
+ struct mlx5_cache_entry *entry;
+ uint32_t prev_gen_cnt = 0;
+
+ MLX5_ASSERT(list);
+ prev_gen_cnt = __atomic_load_n(&list->gen_cnt, __ATOMIC_ACQUIRE);
+ /* Lookup with read lock, reuse if found. */
+ entry = cache_lookup(list, ctx, true);
+ if (entry)
+ return entry;
+ /* Not found, append with write lock - block read from other threads. */
+ rte_rwlock_write_lock(&list->lock);
+ /* If list changed by other threads before lock, search again. */
+ if (prev_gen_cnt != __atomic_load_n(&list->gen_cnt, __ATOMIC_ACQUIRE)) {
+ /* Lookup and reuse w/o read lock. */
+ entry = __cache_lookup(list, ctx, true);
+ if (entry)
+ goto done;
+ }
+ entry = list->cb_create(list, entry, ctx);
+ if (!entry) {
+ DRV_LOG(ERR, "Failed to init cache list %s entry %p.",
+ list->name, (void *)entry);
+ goto done;
+ }
+ entry->ref_cnt = 1;
+ LIST_INSERT_HEAD(&list->head, entry, next);
+ __atomic_add_fetch(&list->gen_cnt, 1, __ATOMIC_RELEASE);
+ __atomic_add_fetch(&list->count, 1, __ATOMIC_ACQUIRE);
+ DRV_LOG(DEBUG, "Cache list %s entry %p new: %u.",
+ list->name, (void *)entry, entry->ref_cnt);
+done:
+ rte_rwlock_write_unlock(&list->lock);
+ return entry;
+}
+
+int
+mlx5_cache_unregister(struct mlx5_cache_list *list,
+ struct mlx5_cache_entry *entry)
+{
+ rte_rwlock_write_lock(&list->lock);
+ MLX5_ASSERT(entry && entry->next.le_prev);
+ DRV_LOG(DEBUG, "Cache list %s entry %p ref--: %u.",
+ list->name, (void *)entry, entry->ref_cnt);
+ if (--entry->ref_cnt) {
+ rte_rwlock_write_unlock(&list->lock);
+ return 1;
+ }
+ __atomic_add_fetch(&list->gen_cnt, 1, __ATOMIC_ACQUIRE);
+ __atomic_sub_fetch(&list->count, 1, __ATOMIC_ACQUIRE);
+ LIST_REMOVE(entry, next);
+ list->cb_remove(list, entry);
+ rte_rwlock_write_unlock(&list->lock);
+ DRV_LOG(DEBUG, "Cache list %s entry %p removed.",
+ list->name, (void *)entry);
+ return 0;
+}
+
+void
+mlx5_cache_list_destroy(struct mlx5_cache_list *list)
+{
+ struct mlx5_cache_entry *entry;
+
+ MLX5_ASSERT(list);
+ /* no LIST_FOREACH_SAFE, using while instead */
+ while (!LIST_EMPTY(&list->head)) {
+ entry = LIST_FIRST(&list->head);
+ LIST_REMOVE(entry, next);
+ list->cb_remove(list, entry);
+ DRV_LOG(DEBUG, "Cache list %s entry %p destroyed.",
+ list->name, (void *)entry);
+ }
+ memset(list, 0, sizeof(*list));
+}
+
+uint32_t
+mlx5_cache_list_get_entry_num(struct mlx5_cache_list *list)
+{
+ MLX5_ASSERT(list);
+ return __atomic_load_n(&list->count, __ATOMIC_RELAXED);
+}
+
/********************* Indexed pool **********************/
static inline void
git.droids-corp.org / dpdk.git / blobdiff