1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 Chelsio Communications, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 * 30 */ 31 32 #ifndef __T4_SMT_H 33 #define __T4_SMT_H 34 35 /* identifies sync vs async SMT_WRITE_REQs */ 36 #define S_SYNC_WR 12 37 #define V_SYNC_WR(x) ((x) << S_SYNC_WR) 38 #define F_SYNC_WR V_SYNC_WR(1) 39 40 enum { SMT_SIZE = 256 }; /* # of SMT entries */ 41 42 enum { 43 SMT_STATE_SWITCHING, /* entry is being used by a switching filter */ 44 SMT_STATE_UNUSED, /* entry not in use */ 45 SMT_STATE_ERROR /* entry is in error state */ 46 }; 47 48 struct smt_entry { 49 uint16_t state; /* entry state */ 50 uint16_t idx; /* entry index */ 51 uint32_t iqid; /* iqid for reply to write_sme */ 52 struct sge_wrq *wrq; /* queue to use for write_sme */ 53 uint16_t pfvf; /* pfvf number */ 54 volatile int refcnt; /* entry reference count */ 55 uint8_t smac[ETHER_ADDR_LEN]; /* source MAC address */ 56 struct mtx lock; 57 }; 58 59 struct smt_data { 60 struct rwlock lock; 61 u_int smt_size; 62 struct smt_entry smtab[]; 63 }; 64 65 66 int t4_init_smt(struct adapter *, int); 67 int t4_free_smt(struct smt_data *); 68 struct smt_entry *t4_find_or_alloc_sme(struct smt_data *, uint8_t *); 69 struct smt_entry *t4_smt_alloc_switching(struct smt_data *, uint8_t *); 70 int t4_smt_set_switching(struct adapter *, struct smt_entry *, 71 uint16_t, uint8_t *); 72 int t4_write_sme(struct smt_entry *); 73 int do_smt_write_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *); 74 75 static inline void 76 t4_smt_release(struct smt_entry *e) 77 { 78 MPASS(e != NULL); 79 if (atomic_fetchadd_int(&e->refcnt, -1) == 1) { 80 mtx_lock(&e->lock); 81 e->state = SMT_STATE_UNUSED; 82 mtx_unlock(&e->lock); 83 } 84 85 } 86 87 int sysctl_smt(SYSCTL_HANDLER_ARGS); 88 89 #endif /* __T4_SMT_H */ 90