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88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2018 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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*/
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#ifndef __T4_SMT_H
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#define __T4_SMT_H
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/* identifies sync vs async SMT_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 { SMT_SIZE = 256 }; /* # of SMT entries */
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enum {
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SMT_STATE_SWITCHING, /* entry is being used by a switching filter */
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SMT_STATE_UNUSED, /* entry not in use */
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SMT_STATE_ERROR /* entry is in error state */
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};
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struct smt_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 iqid; /* iqid for reply to write_sme */
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struct sge_wrq *wrq; /* queue to use for write_sme */
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uint16_t pfvf; /* pfvf number */
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volatile int refcnt; /* entry reference count */
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uint8_t smac[ETHER_ADDR_LEN]; /* source MAC address */
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struct mtx lock;
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};
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struct smt_data {
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struct rwlock lock;
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u_int smt_size;
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struct smt_entry smtab[];
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};
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int t4_init_smt(struct adapter *, int);
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int t4_free_smt(struct smt_data *);
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struct smt_entry *t4_find_or_alloc_sme(struct smt_data *, uint8_t *);
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struct smt_entry *t4_smt_alloc_switching(struct smt_data *, uint8_t *);
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int t4_smt_set_switching(struct adapter *, struct smt_entry *,
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uint16_t, uint8_t *);
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int t4_write_sme(struct smt_entry *);
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int do_smt_write_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *);
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static inline void
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t4_smt_release(struct smt_entry *e)
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{
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MPASS(e != NULL);
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if (atomic_fetchadd_int(&e->refcnt, -1) == 1) {
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mtx_lock(&e->lock);
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e->state = SMT_STATE_UNUSED;
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mtx_unlock(&e->lock);
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}
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}
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int sysctl_smt(SYSCTL_HANDLER_ARGS);
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#endif /* __T4_SMT_H */
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