freebsd-dev/sys/dev/cxgbe/t4_smt.h
2018-06-01 01:05:34 +00:00

90 lines
3.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Chelsio Communications, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*
*/
#ifndef __T4_SMT_H
#define __T4_SMT_H
/* identifies sync vs async SMT_WRITE_REQs */
#define S_SYNC_WR 12
#define V_SYNC_WR(x) ((x) << S_SYNC_WR)
#define F_SYNC_WR V_SYNC_WR(1)
enum { SMT_SIZE = 256 }; /* # of SMT entries */
enum {
SMT_STATE_SWITCHING, /* entry is being used by a switching filter */
SMT_STATE_UNUSED, /* entry not in use */
SMT_STATE_ERROR /* entry is in error state */
};
struct smt_entry {
uint16_t state; /* entry state */
uint16_t idx; /* entry index */
uint32_t iqid; /* iqid for reply to write_sme */
struct sge_wrq *wrq; /* queue to use for write_sme */
uint16_t pfvf; /* pfvf number */
volatile int refcnt; /* entry reference count */
uint8_t smac[ETHER_ADDR_LEN]; /* source MAC address */
struct mtx lock;
};
struct smt_data {
struct rwlock lock;
u_int smt_size;
struct smt_entry smtab[];
};
int t4_init_smt(struct adapter *, int);
int t4_free_smt(struct smt_data *);
struct smt_entry *t4_find_or_alloc_sme(struct smt_data *, uint8_t *);
struct smt_entry *t4_smt_alloc_switching(struct smt_data *, uint8_t *);
int t4_smt_set_switching(struct adapter *, struct smt_entry *,
uint16_t, uint8_t *);
int t4_write_sme(struct smt_entry *);
int do_smt_write_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *);
static inline void
t4_smt_release(struct smt_entry *e)
{
MPASS(e != NULL);
if (atomic_fetchadd_int(&e->refcnt, -1) == 1) {
mtx_lock(&e->lock);
e->state = SMT_STATE_UNUSED;
mtx_unlock(&e->lock);
}
}
int sysctl_smt(SYSCTL_HANDLER_ARGS);
#endif /* __T4_SMT_H */