#include <stdint.h>
#include <stdlib.h>
#include <rte_branch_prediction.h>
+#include <rte_byteorder.h>
#include <rte_memory.h>
+#include <rte_common.h>
+#include <rte_vect.h>
+#include <rte_compat.h>
#ifdef __cplusplus
extern "C" {
/** Max number of characters in LPM name. */
#define RTE_LPM_NAMESIZE 32
-/** @deprecated Possible location to allocate memory. This was for last
- * parameter of rte_lpm_create(), but is now redundant. The LPM table is always
- * allocated in memory using librte_malloc which uses a memzone. */
-#define RTE_LPM_HEAP 0
-
-/** @deprecated Possible location to allocate memory. This was for last
- * parameter of rte_lpm_create(), but is now redundant. The LPM table is always
- * allocated in memory using librte_malloc which uses a memzone. */
-#define RTE_LPM_MEMZONE 1
-
/** Maximum depth value possible for IPv4 LPM. */
#define RTE_LPM_MAX_DEPTH 32
/** @internal Number of entries in a tbl8 group. */
#define RTE_LPM_TBL8_GROUP_NUM_ENTRIES 256
+/** @internal Max number of tbl8 groups in the tbl8. */
+#define RTE_LPM_MAX_TBL8_NUM_GROUPS (1 << 24)
+
/** @internal Total number of tbl8 groups in the tbl8. */
#define RTE_LPM_TBL8_NUM_GROUPS 256
#define RTE_LPM_RETURN_IF_TRUE(cond, retval)
#endif
-/** @internal bitmask with valid and ext_entry/valid_group fields set */
-#define RTE_LPM_VALID_EXT_ENTRY_BITMASK 0x0300
+/** @internal bitmask with valid and valid_group fields set */
+#define RTE_LPM_VALID_EXT_ENTRY_BITMASK 0x03000000
/** Bitmask used to indicate successful lookup */
-#define RTE_LPM_LOOKUP_SUCCESS 0x0100
+#define RTE_LPM_LOOKUP_SUCCESS 0x01000000
+#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
/** @internal Tbl24 entry structure. */
-struct rte_lpm_tbl24_entry {
- /* Stores Next hop or group index (i.e. gindex)into tbl8. */
+__extension__
+struct rte_lpm_tbl_entry_v20 {
+ /**
+ * Stores Next hop (tbl8 or tbl24 when valid_group is not set) or
+ * a group index pointing to a tbl8 structure (tbl24 only, when
+ * valid_group is set)
+ */
+ RTE_STD_C11
union {
uint8_t next_hop;
- uint8_t tbl8_gindex;
+ uint8_t group_idx;
};
/* Using single uint8_t to store 3 values. */
- uint8_t valid :1; /**< Validation flag. */
- uint8_t ext_entry :1; /**< External entry. */
- uint8_t depth :6; /**< Rule depth. */
+ uint8_t valid :1; /**< Validation flag. */
+ /**
+ * For tbl24:
+ * - valid_group == 0: entry stores a next hop
+ * - valid_group == 1: entry stores a group_index pointing to a tbl8
+ * For tbl8:
+ * - valid_group indicates whether the current tbl8 is in use or not
+ */
+ uint8_t valid_group :1;
+ uint8_t depth :6; /**< Rule depth. */
};
-/** @internal Tbl8 entry structure. */
-struct rte_lpm_tbl8_entry {
- uint8_t next_hop; /**< next hop. */
+__extension__
+struct rte_lpm_tbl_entry {
+ /**
+ * Stores Next hop (tbl8 or tbl24 when valid_group is not set) or
+ * a group index pointing to a tbl8 structure (tbl24 only, when
+ * valid_group is set)
+ */
+ uint32_t next_hop :24;
/* Using single uint8_t to store 3 values. */
- uint8_t valid :1; /**< Validation flag. */
- uint8_t valid_group :1; /**< Group validation flag. */
- uint8_t depth :6; /**< Rule depth. */
+ uint32_t valid :1; /**< Validation flag. */
+ /**
+ * For tbl24:
+ * - valid_group == 0: entry stores a next hop
+ * - valid_group == 1: entry stores a group_index pointing to a tbl8
+ * For tbl8:
+ * - valid_group indicates whether the current tbl8 is in use or not
+ */
+ uint32_t valid_group :1;
+ uint32_t depth :6; /**< Rule depth. */
+};
+
+#else
+__extension__
+struct rte_lpm_tbl_entry_v20 {
+ uint8_t depth :6;
+ uint8_t valid_group :1;
+ uint8_t valid :1;
+ union {
+ uint8_t group_idx;
+ uint8_t next_hop;
+ };
+};
+
+__extension__
+struct rte_lpm_tbl_entry {
+ uint32_t depth :6;
+ uint32_t valid_group :1;
+ uint32_t valid :1;
+ uint32_t next_hop :24;
+
+};
+
+#endif
+
+/** LPM configuration structure. */
+struct rte_lpm_config {
+ uint32_t max_rules; /**< Max number of rules. */
+ uint32_t number_tbl8s; /**< Number of tbl8s to allocate. */
+ int flags; /**< This field is currently unused. */
};
/** @internal Rule structure. */
-struct rte_lpm_rule {
+struct rte_lpm_rule_v20 {
uint32_t ip; /**< Rule IP address. */
uint8_t next_hop; /**< Rule next hop. */
};
+struct rte_lpm_rule {
+ uint32_t ip; /**< Rule IP address. */
+ uint32_t next_hop; /**< Rule next hop. */
+};
+
/** @internal Contains metadata about the rules table. */
struct rte_lpm_rule_info {
uint32_t used_rules; /**< Used rules so far. */
};
/** @internal LPM structure. */
-struct rte_lpm {
- TAILQ_ENTRY(rte_lpm) next; /**< Next in list. */
-
+struct rte_lpm_v20 {
/* LPM metadata. */
char name[RTE_LPM_NAMESIZE]; /**< Name of the lpm. */
- int mem_location; /**< @deprecated @see RTE_LPM_HEAP and RTE_LPM_MEMZONE. */
uint32_t max_rules; /**< Max. balanced rules per lpm. */
struct rte_lpm_rule_info rule_info[RTE_LPM_MAX_DEPTH]; /**< Rule info table. */
/* LPM Tables. */
- struct rte_lpm_tbl24_entry tbl24[RTE_LPM_TBL24_NUM_ENTRIES] \
+ struct rte_lpm_tbl_entry_v20 tbl24[RTE_LPM_TBL24_NUM_ENTRIES]
__rte_cache_aligned; /**< LPM tbl24 table. */
- struct rte_lpm_tbl8_entry tbl8[RTE_LPM_TBL8_NUM_ENTRIES] \
+ struct rte_lpm_tbl_entry_v20 tbl8[RTE_LPM_TBL8_NUM_ENTRIES]
__rte_cache_aligned; /**< LPM tbl8 table. */
- struct rte_lpm_rule rules_tbl[0] \
+ struct rte_lpm_rule_v20 rules_tbl[]
__rte_cache_aligned; /**< LPM rules. */
};
+struct rte_lpm {
+ /* LPM metadata. */
+ char name[RTE_LPM_NAMESIZE]; /**< Name of the lpm. */
+ uint32_t max_rules; /**< Max. balanced rules per lpm. */
+ uint32_t number_tbl8s; /**< Number of tbl8s. */
+ struct rte_lpm_rule_info rule_info[RTE_LPM_MAX_DEPTH]; /**< Rule info table. */
+
+ /* LPM Tables. */
+ struct rte_lpm_tbl_entry tbl24[RTE_LPM_TBL24_NUM_ENTRIES]
+ __rte_cache_aligned; /**< LPM tbl24 table. */
+ struct rte_lpm_tbl_entry *tbl8; /**< LPM tbl8 table. */
+ struct rte_lpm_rule *rules_tbl; /**< LPM rules. */
+};
+
/**
* Create an LPM object.
*
* LPM object name
* @param socket_id
* NUMA socket ID for LPM table memory allocation
- * @param max_rules
- * Maximum number of LPM rules that can be added
- * @param flags
- * This parameter is currently unused
+ * @param config
+ * Structure containing the configuration
* @return
* Handle to LPM object on success, NULL otherwise with rte_errno set
* to an appropriate values. Possible rte_errno values include:
* - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
* - E_RTE_SECONDARY - function was called from a secondary process instance
- * - E_RTE_NO_TAILQ - no tailq list could be got for the lpm object list
* - EINVAL - invalid parameter passed to function
* - ENOSPC - the maximum number of memzones has already been allocated
* - EEXIST - a memzone with the same name already exists
* - ENOMEM - no appropriate memory area found in which to create memzone
*/
struct rte_lpm *
-rte_lpm_create(const char *name, int socket_id, int max_rules, int flags);
+rte_lpm_create(const char *name, int socket_id,
+ const struct rte_lpm_config *config);
+struct rte_lpm_v20 *
+rte_lpm_create_v20(const char *name, int socket_id, int max_rules, int flags);
+struct rte_lpm *
+rte_lpm_create_v1604(const char *name, int socket_id,
+ const struct rte_lpm_config *config);
/**
* Find an existing LPM object and return a pointer to it.
*/
struct rte_lpm *
rte_lpm_find_existing(const char *name);
+struct rte_lpm_v20 *
+rte_lpm_find_existing_v20(const char *name);
+struct rte_lpm *
+rte_lpm_find_existing_v1604(const char *name);
/**
* Free an LPM object.
*/
void
rte_lpm_free(struct rte_lpm *lpm);
+void
+rte_lpm_free_v20(struct rte_lpm_v20 *lpm);
+void
+rte_lpm_free_v1604(struct rte_lpm *lpm);
/**
* Add a rule to the LPM table.
* 0 on success, negative value otherwise
*/
int
-rte_lpm_add(struct rte_lpm *lpm, uint32_t ip, uint8_t depth, uint8_t next_hop);
+rte_lpm_add(struct rte_lpm *lpm, uint32_t ip, uint8_t depth, uint32_t next_hop);
+int
+rte_lpm_add_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+ uint8_t next_hop);
+int
+rte_lpm_add_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+ uint32_t next_hop);
+
+/**
+ * Check if a rule is present in the LPM table,
+ * and provide its next hop if it is.
+ *
+ * @param lpm
+ * LPM object handle
+ * @param ip
+ * IP of the rule to be searched
+ * @param depth
+ * Depth of the rule to searched
+ * @param next_hop
+ * Next hop of the rule (valid only if it is found)
+ * @return
+ * 1 if the rule exists, 0 if it does not, a negative value on failure
+ */
+int
+rte_lpm_is_rule_present(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+uint32_t *next_hop);
+int
+rte_lpm_is_rule_present_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth,
+uint8_t *next_hop);
+int
+rte_lpm_is_rule_present_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
+uint32_t *next_hop);
/**
* Delete a rule from the LPM table.
*/
int
rte_lpm_delete(struct rte_lpm *lpm, uint32_t ip, uint8_t depth);
+int
+rte_lpm_delete_v20(struct rte_lpm_v20 *lpm, uint32_t ip, uint8_t depth);
+int
+rte_lpm_delete_v1604(struct rte_lpm *lpm, uint32_t ip, uint8_t depth);
/**
* Delete all rules from the LPM table.
*/
void
rte_lpm_delete_all(struct rte_lpm *lpm);
+void
+rte_lpm_delete_all_v20(struct rte_lpm_v20 *lpm);
+void
+rte_lpm_delete_all_v1604(struct rte_lpm *lpm);
/**
* Lookup an IP into the LPM table.
* -EINVAL for incorrect arguments, -ENOENT on lookup miss, 0 on lookup hit
*/
static inline int
-rte_lpm_lookup(struct rte_lpm *lpm, uint32_t ip, uint8_t *next_hop)
+rte_lpm_lookup(struct rte_lpm *lpm, uint32_t ip, uint32_t *next_hop)
{
unsigned tbl24_index = (ip >> 8);
- uint16_t tbl_entry;
+ uint32_t tbl_entry;
+ const uint32_t *ptbl;
/* DEBUG: Check user input arguments. */
RTE_LPM_RETURN_IF_TRUE(((lpm == NULL) || (next_hop == NULL)), -EINVAL);
/* Copy tbl24 entry */
- tbl_entry = *(const uint16_t *)&lpm->tbl24[tbl24_index];
+ ptbl = (const uint32_t *)(&lpm->tbl24[tbl24_index]);
+ tbl_entry = *ptbl;
/* Copy tbl8 entry (only if needed) */
if (unlikely((tbl_entry & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
unsigned tbl8_index = (uint8_t)ip +
- ((uint8_t)tbl_entry * RTE_LPM_TBL8_GROUP_NUM_ENTRIES);
+ (((uint32_t)tbl_entry & 0x00FFFFFF) *
+ RTE_LPM_TBL8_GROUP_NUM_ENTRIES);
- tbl_entry = *(const uint16_t *)&lpm->tbl8[tbl8_index];
+ ptbl = (const uint32_t *)&lpm->tbl8[tbl8_index];
+ tbl_entry = *ptbl;
}
- *next_hop = (uint8_t)tbl_entry;
+ *next_hop = ((uint32_t)tbl_entry & 0x00FFFFFF);
return (tbl_entry & RTE_LPM_LOOKUP_SUCCESS) ? 0 : -ENOENT;
}
rte_lpm_lookup_bulk_func(lpm, ips, next_hops, n)
static inline int
-rte_lpm_lookup_bulk_func(const struct rte_lpm *lpm, const uint32_t * ips,
- uint16_t * next_hops, const unsigned n)
+rte_lpm_lookup_bulk_func(const struct rte_lpm *lpm, const uint32_t *ips,
+ uint32_t *next_hops, const unsigned n)
{
unsigned i;
unsigned tbl24_indexes[n];
+ const uint32_t *ptbl;
/* DEBUG: Check user input arguments. */
RTE_LPM_RETURN_IF_TRUE(((lpm == NULL) || (ips == NULL) ||
for (i = 0; i < n; i++) {
/* Simply copy tbl24 entry to output */
- next_hops[i] = *(const uint16_t *)&lpm->tbl24[tbl24_indexes[i]];
+ ptbl = (const uint32_t *)&lpm->tbl24[tbl24_indexes[i]];
+ next_hops[i] = *ptbl;
/* Overwrite output with tbl8 entry if needed */
if (unlikely((next_hops[i] & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
unsigned tbl8_index = (uint8_t)ips[i] +
- ((uint8_t)next_hops[i] *
+ (((uint32_t)next_hops[i] & 0x00FFFFFF) *
RTE_LPM_TBL8_GROUP_NUM_ENTRIES);
- next_hops[i] = *(const uint16_t *)&lpm->tbl8[tbl8_index];
+ ptbl = (const uint32_t *)&lpm->tbl8[tbl8_index];
+ next_hops[i] = *ptbl;
}
}
return 0;
}
+/* Mask four results. */
+#define RTE_LPM_MASKX4_RES UINT64_C(0x00ffffff00ffffff)
+
+/**
+ * Lookup four IP addresses in an LPM table.
+ *
+ * @param lpm
+ * LPM object handle
+ * @param ip
+ * Four IPs to be looked up in the LPM table
+ * @param hop
+ * Next hop of the most specific rule found for IP (valid on lookup hit only).
+ * This is an 4 elements array of two byte values.
+ * If the lookup was succesfull for the given IP, then least significant byte
+ * of the corresponding element is the actual next hop and the most
+ * significant byte is zero.
+ * If the lookup for the given IP failed, then corresponding element would
+ * contain default value, see description of then next parameter.
+ * @param defv
+ * Default value to populate into corresponding element of hop[] array,
+ * if lookup would fail.
+ */
+static inline void
+rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
+ uint32_t defv);
+
+#if defined(RTE_ARCH_ARM) || defined(RTE_ARCH_ARM64)
+#include "rte_lpm_neon.h"
+#elif defined(RTE_ARCH_PPC_64)
+#include "rte_lpm_altivec.h"
+#else
+#include "rte_lpm_sse.h"
+#endif
+
#ifdef __cplusplus
}
#endif