LXR linux/drivers/net/ethernet/chelsio/cxgb4/smt.h

   1/*
   2 * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
   3 *
   4 * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved.
   5 *
   6 * This software is available to you under a choice of one of two
   7 * licenses.  You may choose to be licensed under the terms of the GNU
   8 * General Public License (GPL) Version 2, available from the file
   9 * COPYING in the main directory of this source tree, or the
  10 * OpenIB.org BSD license below:
  11 *
  12 *     Redistribution and use in source and binary forms, with or
  13 *     without modification, are permitted provided that the following
  14 *     conditions are met:
  15 *
  16 *      - Redistributions of source code must retain the above
  17 *        copyright notice, this list of conditions and the following
  18 *        disclaimer.
  19 *
  20 *      - Redistributions in binary form must reproduce the above
  21 *        copyright notice, this list of conditions and the following
  22 *        disclaimer in the documentation and/or other materials
  23 *        provided with the distribution.
  24 *
  25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32 * SOFTWARE.
  33 */
  34
  35#ifndef __CXGB4_SMT_H
  36#define __CXGB4_SMT_H
  37
  38#include <linux/spinlock.h>
  39#include <linux/if_ether.h>
  40#include <linux/atomic.h>
  41
  42struct adapter;
  43struct cpl_smt_write_rpl;
  44
  45/* SMT related handling. Heavily adapted based on l2t ops in l2t.h/l2t.c
  46 */
  47enum {
  48        SMT_STATE_SWITCHING,
  49        SMT_STATE_UNUSED,
  50        SMT_STATE_ERROR
  51};
  52
  53enum {
  54        SMT_SIZE = 256
  55};
  56
  57struct smt_entry {
  58        u16 state;
  59        u16 idx;
  60        u16 pfvf;
  61        u8 src_mac[ETH_ALEN];
  62        atomic_t refcnt;
  63        spinlock_t lock;        /* protect smt entry add,removal */
  64};
  65
  66struct smt_data {
  67        unsigned int smt_size;
  68        rwlock_t lock;
  69        struct smt_entry smtab[0];
  70};
  71
  72struct smt_data *t4_init_smt(void);
  73struct smt_entry *cxgb4_smt_alloc_switching(struct net_device *dev, u8 *smac);
  74void cxgb4_smt_release(struct smt_entry *e);
  75void do_smt_write_rpl(struct adapter *p, const struct cpl_smt_write_rpl *rpl);
  76#endif /* __CXGB4_SMT_H */
  77