drivers/net/ethernet/chelsio/cxgb4/srq.h

   1 /*
   2  * This file is part of the Chelsio T6 Ethernet driver for Linux.
   3  *
   4  * Copyright (c) 2017-2018 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_SRQ_H
  36 #define __CXGB4_SRQ_H
  37
  38 struct adapter;
  39 struct cpl_srq_table_rpl;
  40
  41 #define SRQ_WAIT_TO     (HZ * 5)
  42
  43 struct srq_entry {
  44         u8 valid;
  45         u8 idx;
  46         u8 qlen;
  47         u16 pdid;
  48         u16 cur_msn;
  49         u16 max_msn;
  50         u32 qbase;
  51 };
  52
  53 struct srq_data {
  54         unsigned int srq_size;
  55         struct srq_entry *entryp;
  56         struct completion comp;
  57         struct mutex lock; /* generic mutex for srq data */
  58 };
  59
  60 struct srq_data *t4_init_srq(int srq_size);
  61 int cxgb4_get_srq_entry(struct net_device *dev,
  62                         int srq_idx, struct srq_entry *entryp);
  63 void do_srq_table_rpl(struct adapter *adap,
  64                       const struct cpl_srq_table_rpl *rpl);
  65 #endif  /* __CXGB4_SRQ_H */