app/eventdev: switch sequence number to dynamic mbuf field

[dpdk.git] / lib / librte_fib / trie.h

diff --git a/lib/librte_fib/trie.h b/lib/librte_fib/trie.h
index e328bef..a4f429c 100644 (file)
--- a/lib/librte_fib/trie.h
+++ b/lib/librte_fib/trie.h
@@ -10,11 +10,128 @@
  * @file
  * RTE IPv6 Longest Prefix Match (LPM)
  */
+#include <rte_prefetch.h>
+#include <rte_branch_prediction.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/* @internal Total number of tbl24 entries. */
+#define TRIE_TBL24_NUM_ENT     (1 << 24)
+/* Maximum depth value possible for IPv6 LPM. */
+#define TRIE_MAX_DEPTH         128
+/* @internal Number of entries in a tbl8 group. */
+#define TRIE_TBL8_GRP_NUM_ENT  256ULL
+/* @internal Total number of tbl8 groups in the tbl8. */
+#define TRIE_TBL8_NUM_GROUPS   65536
+/* @internal bitmask with valid and valid_group fields set */
+#define TRIE_EXT_ENT           1
+
+#define BITMAP_SLAB_BIT_SIZE_LOG2      6
+#define BITMAP_SLAB_BIT_SIZE           (1ULL << BITMAP_SLAB_BIT_SIZE_LOG2)
+#define BITMAP_SLAB_BITMASK            (BITMAP_SLAB_BIT_SIZE - 1)
+
+struct rte_trie_tbl {
+       uint32_t        number_tbl8s;   /**< Total number of tbl8s */
+       uint32_t        rsvd_tbl8s;     /**< Number of reserved tbl8s */
+       uint32_t        cur_tbl8s;      /**< Current cumber of tbl8s */
+       uint64_t        def_nh;         /**< Default next hop */
+       enum rte_fib_trie_nh_sz nh_sz;  /**< Size of nexthop entry */
+       uint64_t        *tbl8;          /**< tbl8 table. */
+       uint32_t        *tbl8_pool;     /**< bitmap containing free tbl8 idxes*/
+       uint32_t        tbl8_pool_pos;
+       /* tbl24 table. */
+       __extension__ uint64_t  tbl24[0] __rte_cache_aligned;
+};
+
+static inline uint32_t
+get_tbl24_idx(const uint8_t *ip)
+{
+       return ip[0] << 16|ip[1] << 8|ip[2];
+}
+
+static inline void *
+get_tbl24_p(struct rte_trie_tbl *dp, const uint8_t *ip, uint8_t nh_sz)
+{
+       uint32_t tbl24_idx;
+
+       tbl24_idx = get_tbl24_idx(ip);
+       return (void *)&((uint8_t *)dp->tbl24)[tbl24_idx << nh_sz];
+}
+
+static inline uint8_t
+bits_in_nh(uint8_t nh_sz)
+{
+       return 8 * (1 << nh_sz);
+}
+
+static inline uint64_t
+get_max_nh(uint8_t nh_sz)
+{
+       return ((1ULL << (bits_in_nh(nh_sz) - 1)) - 1);
+}
+
+static inline uint64_t
+lookup_msk(uint8_t nh_sz)
+{
+       return ((1ULL << ((1 << (nh_sz + 3)) - 1)) << 1) - 1;
+}
+
+static inline uint8_t
+get_psd_idx(uint32_t val, uint8_t nh_sz)
+{
+       return val & ((1 << (3 - nh_sz)) - 1);
+}
+
+static inline uint32_t
+get_tbl_pos(uint32_t val, uint8_t nh_sz)
+{
+       return val >> (3 - nh_sz);
+}
+
+static inline uint64_t
+get_tbl_val_by_idx(uint64_t *tbl, uint32_t idx, uint8_t nh_sz)
+{
+       return ((tbl[get_tbl_pos(idx, nh_sz)] >> (get_psd_idx(idx, nh_sz) *
+               bits_in_nh(nh_sz))) & lookup_msk(nh_sz));
+}
+
+static inline void *
+get_tbl_p_by_idx(uint64_t *tbl, uint64_t idx, uint8_t nh_sz)
+{
+       return (uint8_t *)tbl + (idx << nh_sz);
+}
+
+static inline int
+is_entry_extended(uint64_t ent)
+{
+       return (ent & TRIE_EXT_ENT) == TRIE_EXT_ENT;
+}
+
+#define LOOKUP_FUNC(suffix, type, nh_sz)                               \
+static inline void rte_trie_lookup_bulk_##suffix(void *p,              \
+       uint8_t ips[][RTE_FIB6_IPV6_ADDR_SIZE],                         \
+       uint64_t *next_hops, const unsigned int n)                      \
+{                                                                      \
+       struct rte_trie_tbl *dp = (struct rte_trie_tbl *)p;             \
+       uint64_t tmp;                                                   \
+       uint32_t i, j;                                                  \
+                                                                       \
+       for (i = 0; i < n; i++) {                                       \
+               tmp = ((type *)dp->tbl24)[get_tbl24_idx(&ips[i][0])];   \
+               j = 3;                                                  \
+               while (is_entry_extended(tmp)) {                        \
+                       tmp = ((type *)dp->tbl8)[ips[i][j++] +          \
+                               ((tmp >> 1) * TRIE_TBL8_GRP_NUM_ENT)];  \
+               }                                                       \
+               next_hops[i] = tmp >> 1;                                \
+       }                                                               \
+}
+LOOKUP_FUNC(2b, uint16_t, 1)
+LOOKUP_FUNC(4b, uint32_t, 2)
+LOOKUP_FUNC(8b, uint64_t, 3)
+
 void *
 trie_create(const char *name, int socket_id, struct rte_fib6_conf *conf);