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
  42 struct adapter;
  43 struct cpl_smt_write_rpl;
  44
  45 /* SMT related handling. Heavily adapted based on l2t ops in l2t.h/l2t.c
  46  */
  47 enum {
  48         SMT_STATE_SWITCHING,
  49         SMT_STATE_UNUSED,
  50         SMT_STATE_ERROR
  51 };
  52
  53 enum {
  54         SMT_SIZE = 256
  55 };
  56
  57 struct smt_entry {
  58         u16 state;
  59         u16 idx;
  60         u16 pfvf;
  61         u8 src_mac[ETH_ALEN];
  62         int refcnt;
  63         spinlock_t lock;        /* protect smt entry add,removal */
  64 };
  65
  66 struct smt_data {
  67         unsigned int smt_size;
  68         rwlock_t lock;
  69         struct smt_entry smtab[0];
  70 };
  71
  72 struct smt_data *t4_init_smt(void);
  73 struct smt_entry *cxgb4_smt_alloc_switching(struct net_device *dev, u8 *smac);
  74 void cxgb4_smt_release(struct smt_entry *e);
  75 void do_smt_write_rpl(struct adapter *p, const struct cpl_smt_write_rpl *rpl);
  76 #endif /* __CXGB4_SMT_H */