/*-
* BSD LICENSE
*
- * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
* All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
* are met:
*
- * * Redistributions of source code must retain the above copyright
+ * * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
* distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
*/
#ifndef _RTE_LPM_H_
/** @internal Tbl24 entry structure. */
struct rte_lpm_tbl24_entry {
- /* 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. */
/* Stores Next hop or group index (i.e. gindex)into tbl8. */
union {
uint8_t next_hop;
uint8_t tbl8_gindex;
};
+ /* 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. */
};
/** @internal Tbl8 entry structure. */
struct rte_lpm_tbl8_entry {
+ uint8_t next_hop; /**< next hop. */
/* 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. */
- uint8_t next_hop; /**< next hop. */
};
/** @internal Rule structure. */
static inline int
rte_lpm_lookup(struct rte_lpm *lpm, uint32_t ip, uint8_t *next_hop)
{
- uint32_t tbl24_index, tbl8_group_index, tbl8_index;
+ unsigned tbl24_index = (ip >> 8);
+ uint16_t tbl_entry;
/* DEBUG: Check user input arguments. */
RTE_LPM_RETURN_IF_TRUE(((lpm == NULL) || (next_hop == NULL)), -EINVAL);
- /* Calculate index into tbl24. */
- tbl24_index = (ip >> 8);
+ /* Copy tbl24 entry */
+ tbl_entry = *(const uint16_t *)&lpm->tbl24[tbl24_index];
+
+ /* Copy tbl8 entry (only if needed) */
+ if (unlikely((tbl_entry & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
+ RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
- /*
- * Use the tbl24_index to access the required tbl24 entry then check if
- * the tbl24 entry is INVALID, if so return -ENOENT.
- */
- if (!lpm->tbl24[tbl24_index].valid){
- return -ENOENT; /* Lookup miss. */
+ unsigned tbl8_index = (uint8_t)ip +
+ ((uint8_t)tbl_entry * RTE_LPM_TBL8_GROUP_NUM_ENTRIES);
+
+ tbl_entry = *(const uint16_t *)&lpm->tbl8[tbl8_index];
}
- /*
- * If tbl24 entry is valid check if it is NOT extended (i.e. it does
- * not use a tbl8 extension) if so return the next hop.
- */
- if (likely(lpm->tbl24[tbl24_index].ext_entry == 0)) {
- *next_hop = lpm->tbl24[tbl24_index].next_hop;
- return 0; /* Lookup hit. */
+
+ *next_hop = (uint8_t)tbl_entry;
+ return (tbl_entry & RTE_LPM_LOOKUP_SUCCESS) ? 0 : -ENOENT;
+}
+
+/**
+ * Lookup multiple IP addresses in an LPM table. This may be implemented as a
+ * macro, so the address of the function should not be used.
+ *
+ * @param lpm
+ * LPM object handle
+ * @param ips
+ * Array of IPs to be looked up in the LPM table
+ * @param next_hops
+ * Next hop of the most specific rule found for IP (valid on lookup hit only).
+ * This is an array of two byte values. The most significant byte in each
+ * value says whether the lookup was successful (bitmask
+ * RTE_LPM_LOOKUP_SUCCESS is set). The least significant byte is the
+ * actual next hop.
+ * @param n
+ * Number of elements in ips (and next_hops) array to lookup. This should be a
+ * compile time constant, and divisible by 8 for best performance.
+ * @return
+ * -EINVAL for incorrect arguments, otherwise 0
+ */
+#define rte_lpm_lookup_bulk(lpm, ips, next_hops, n) \
+ 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)
+{
+ unsigned i;
+ unsigned tbl24_indexes[n];
+
+ /* DEBUG: Check user input arguments. */
+ RTE_LPM_RETURN_IF_TRUE(((lpm == NULL) || (ips == NULL) ||
+ (next_hops == NULL)), -EINVAL);
+
+ for (i = 0; i < n; i++) {
+ tbl24_indexes[i] = ips[i] >> 8;
}
- /*
- * If tbl24 entry is valid and extended calculate the index into the
- * tbl8 entry.
- */
- tbl8_group_index = lpm->tbl24[tbl24_index].tbl8_gindex;
- tbl8_index = (tbl8_group_index * RTE_LPM_TBL8_GROUP_NUM_ENTRIES) +
- (ip & 0xFF);
-
- /* Check if the tbl8 entry is invalid and if so return -ENOENT. */
- if (!lpm->tbl8[tbl8_index].valid)
- return -ENOENT;/* Lookup miss. */
-
- /* If the tbl8 entry is valid return return the next_hop. */
- *next_hop = lpm->tbl8[tbl8_index].next_hop;
- return 0; /* Lookup hit. */
+ for (i = 0; i < n; i++) {
+ /* Simply copy tbl24 entry to output */
+ next_hops[i] = *(const uint16_t *)&lpm->tbl24[tbl24_indexes[i]];
+
+ /* 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] *
+ RTE_LPM_TBL8_GROUP_NUM_ENTRIES);
+
+ next_hops[i] = *(const uint16_t *)&lpm->tbl8[tbl8_index];
+ }
+ }
+ return 0;
}
#ifdef __cplusplus
git.droids-corp.org / dpdk.git / blobdiff