718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
115 lines
4.3 KiB
C
115 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 Chelsio Communications, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef __T4_L2T_H
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#define __T4_L2T_H
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/* identifies sync vs async L2T_WRITE_REQs */
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#define S_SYNC_WR 12
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#define V_SYNC_WR(x) ((x) << S_SYNC_WR)
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#define F_SYNC_WR V_SYNC_WR(1)
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enum { L2T_SIZE = 4096 }; /* # of L2T entries */
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enum {
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L2T_STATE_VALID, /* entry is up to date */
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L2T_STATE_STALE, /* entry may be used but needs revalidation */
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L2T_STATE_RESOLVING, /* entry needs address resolution */
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L2T_STATE_FAILED, /* failed to resolve */
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L2T_STATE_SYNC_WRITE, /* synchronous write of entry underway */
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/* when state is one of the below the entry is not hashed */
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L2T_STATE_SWITCHING, /* entry is being used by a switching filter */
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L2T_STATE_UNUSED /* entry not in use */
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};
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/*
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* Each L2T entry plays multiple roles. First of all, it keeps state for the
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* corresponding entry of the HW L2 table and maintains a queue of offload
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* packets awaiting address resolution. Second, it is a node of a hash table
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* chain, where the nodes of the chain are linked together through their next
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* pointer. Finally, each node is a bucket of a hash table, pointing to the
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* first element in its chain through its first pointer.
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*/
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struct l2t_entry {
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uint16_t state; /* entry state */
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uint16_t idx; /* entry index */
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uint32_t addr[4]; /* next hop IP or IPv6 address */
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uint32_t iqid; /* iqid for reply to write_l2e */
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struct sge_wrq *wrq; /* queue to use for write_l2e */
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struct ifnet *ifp; /* outgoing interface */
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uint16_t smt_idx; /* SMT index */
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uint16_t vlan; /* VLAN TCI (id: 0-11, prio: 13-15) */
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struct l2t_entry *first; /* start of hash chain */
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struct l2t_entry *next; /* next l2t_entry on chain */
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STAILQ_HEAD(, wrqe) wr_list; /* list of WRs awaiting resolution */
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struct mtx lock;
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volatile int refcnt; /* entry reference count */
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uint16_t hash; /* hash bucket the entry is on */
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uint8_t ipv6; /* entry is for an IPv6 address */
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uint8_t lport; /* associated offload logical port */
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uint8_t dmac[ETHER_ADDR_LEN]; /* next hop's MAC address */
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};
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struct l2t_data {
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struct rwlock lock;
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u_int l2t_size;
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volatile int nfree; /* number of free entries */
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struct l2t_entry *rover;/* starting point for next allocation */
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struct l2t_entry l2tab[];
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};
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int t4_init_l2t(struct adapter *, int);
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int t4_free_l2t(struct l2t_data *);
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struct l2t_entry *t4_alloc_l2e(struct l2t_data *);
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struct l2t_entry *t4_l2t_alloc_switching(struct l2t_data *);
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int t4_l2t_set_switching(struct adapter *, struct l2t_entry *, uint16_t,
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uint8_t, uint8_t *);
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int t4_write_l2e(struct l2t_entry *, int);
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int do_l2t_write_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *);
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static inline void
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t4_l2t_release(struct l2t_entry *e)
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{
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struct l2t_data *d = __containerof(e, struct l2t_data, l2tab[e->idx]);
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if (atomic_fetchadd_int(&e->refcnt, -1) == 1)
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atomic_add_int(&d->nfree, 1);
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}
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#ifdef SBUF_DRAIN
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int sysctl_l2t(SYSCTL_HANDLER_ARGS);
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#endif
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#endif /* __T4_L2T_H */
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