1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * This file is part of the Chelsio T4 support code. 14 * 15 * Copyright (C) 2010-2013 Chelsio Communications. All rights reserved. 16 * 17 * This program is distributed in the hope that it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this 20 * release for licensing terms and conditions. 21 */ 22 23 #ifndef __CXGBE_T4L2T_H 24 #define __CXGBE_T4L2T_H 25 26 #include <inet/ip.h> 27 #include <inet/ip2mac.h> 28 29 enum { L2T_SIZE = 4096 }; /* # of L2T entries */ 30 31 #define MBUF_EQ(mp) (*((void **)(&(mp)->b_datap->db_cksumstuff))) 32 33 /* 34 * Each L2T entry plays multiple roles. First of all, it keeps state for the 35 * corresponding entry of the HW L2 table and maintains a queue of offload 36 * packets awaiting address resolution. Second, it is a node of a hash table 37 * chain, where the nodes of the chain are linked together through their next 38 * pointer. Finally, each node is a bucket of a hash table, pointing to the 39 * first element in its chain through its first pointer. 40 */ 41 struct l2t_entry { 42 uint16_t state; /* entry state */ 43 uint16_t idx; /* entry index */ 44 uint32_t addr[4]; /* next hop IP or IPv6 address */ 45 in_addr_t in_addr; 46 struct adapter *sc; /* associated adapter */ 47 uint16_t smt_idx; /* SMT index */ 48 uint16_t vlan; /* VLAN TCI (id: 0-11, prio: 13-15) */ 49 int ifindex; /* interface index */ 50 struct l2t_entry *first; /* start of hash chain */ 51 struct l2t_entry *next; /* next l2t_entry on chain */ 52 mblk_t *arpq_head; /* list of mblks awaiting resolution */ 53 mblk_t *arpq_tail; 54 kmutex_t lock; 55 volatile uint_t refcnt; /* entry reference count */ 56 uint16_t hash; /* hash bucket the entry is on */ 57 uint8_t v6; /* whether entry is for IPv6 */ 58 uint8_t lport; /* associated offload logical port */ 59 uint8_t dmac[ETHERADDRL]; /* next hop's MAC address */ 60 }; 61 62 int t4_free_l2t(struct l2t_data *d); 63 void t4_l2t_release(struct l2t_entry *e); 64 int do_l2t_write_rpl(struct sge_iq *iq, const struct rss_header *rss, 65 mblk_t *m); 66 67 #ifndef TCP_OFFLOAD_DISABLE 68 struct l2t_entry *t4_l2t_get(struct port_info *pi, conn_t *connp); 69 int t4_l2t_send(struct adapter *sc, mblk_t *m, struct l2t_entry *e); 70 void t4_l2t_update(ip2mac_t *ip2macp, void* arg); 71 #endif 72 73 #endif /* __CXGBE_T4L2T_H */ 74