[dpdk-dev] [PATCH v9 6/8] fib6: move lookup definition into the header file

[Vladimir Medvedkin <vladimir.medvedkin@intel.com>]

Move trie table layout and lookup definition into the
private header file. This is necessary for implementing a
vectorized lookup function in a separate .с file.

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 lib/librte_fib/trie.c | 121 --------------------------------------------------
 lib/librte_fib/trie.h | 117 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+), 121 deletions(-)

diff --git a/lib/librte_fib/trie.c b/lib/librte_fib/trie.c
index fc14670..82ba13d 100644
--- a/lib/librte_fib/trie.c
+++ b/lib/librte_fib/trie.c
@@ -11,141 +11,20 @@
 
 #include <rte_debug.h>
 #include <rte_malloc.h>
-#include <rte_prefetch.h>
 #include <rte_errno.h>
 #include <rte_memory.h>
-#include <rte_branch_prediction.h>
 
 #include <rte_rib6.h>
 #include <rte_fib6.h>
 #include "trie.h"
 
-/* @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 TRIE_NAMESIZE		64
 
-#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;
-};
-
 enum edge {
 	LEDGE,
 	REDGE
 };
 
-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 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)
-
 static inline rte_fib6_lookup_fn_t
 get_scalar_fn(enum rte_fib_trie_nh_sz nh_sz)
 {
diff --git a/lib/librte_fib/trie.h b/lib/librte_fib/trie.h
index 0d5ef9a..663c7a9 100644
--- 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);
 
-- 
2.7.4