include/rdma/opa_vnic.h

   1 #ifndef _OPA_VNIC_H
   2 #define _OPA_VNIC_H
   3 /*
   4  * Copyright(c) 2017 Intel Corporation.
   5  *
   6  * This file is provided under a dual BSD/GPLv2 license.  When using or
   7  * redistributing this file, you may do so under either license.
   8  *
   9  * GPL LICENSE SUMMARY
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * BSD LICENSE
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  *
  26  *  - Redistributions of source code must retain the above copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  *  - Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in
  30  *    the documentation and/or other materials provided with the
  31  *    distribution.
  32  *  - Neither the name of Intel Corporation nor the names of its
  33  *    contributors may be used to endorse or promote products derived
  34  *    from this software without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  37  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  38  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  39  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  40  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  43  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  44  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  45  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  46  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  47  *
  48  */
  49
  50 /*
  51  * This file contains Intel Omni-Path (OPA) Virtual Network Interface
  52  * Controller (VNIC) specific declarations.
  53  */
  54
  55 #include <rdma/ib_verbs.h>
  56
  57 /* VNIC uses 16B header format */
  58 #define OPA_VNIC_L2_TYPE    0x2
  59
  60 /* 16 header bytes + 2 reserved bytes */
  61 #define OPA_VNIC_L2_HDR_LEN   (16 + 2)
  62
  63 #define OPA_VNIC_L4_HDR_LEN   2
  64
  65 #define OPA_VNIC_HDR_LEN      (OPA_VNIC_L2_HDR_LEN + \
  66                                OPA_VNIC_L4_HDR_LEN)
  67
  68 #define OPA_VNIC_L4_ETHR  0x78
  69
  70 #define OPA_VNIC_ICRC_LEN   4
  71 #define OPA_VNIC_TAIL_LEN   1
  72 #define OPA_VNIC_ICRC_TAIL_LEN  (OPA_VNIC_ICRC_LEN + OPA_VNIC_TAIL_LEN)
  73
  74 #define OPA_VNIC_SKB_MDATA_LEN         4
  75 #define OPA_VNIC_SKB_MDATA_ENCAP_ERR   0x1
  76
  77 /* opa vnic rdma netdev's private data structure */
  78 struct opa_vnic_rdma_netdev {
  79         struct rdma_netdev rn;  /* keep this first */
  80         /* followed by device private data */
  81         char *dev_priv[0];
  82 };
  83
  84 static inline void *opa_vnic_priv(const struct net_device *dev)
  85 {
  86         struct rdma_netdev *rn = netdev_priv(dev);
  87
  88         return rn->clnt_priv;
  89 }
  90
  91 static inline void *opa_vnic_dev_priv(const struct net_device *dev)
  92 {
  93         struct opa_vnic_rdma_netdev *oparn = netdev_priv(dev);
  94
  95         return oparn->dev_priv;
  96 }
  97
  98 /* opa_vnic skb meta data structrue */
  99 struct opa_vnic_skb_mdata {
 100         u8 vl;
 101         u8 entropy;
 102         u8 flags;
 103         u8 rsvd;
 104 } __packed;
 105
 106 /* OPA VNIC group statistics */
 107 struct opa_vnic_grp_stats {
 108         u64 unicast;
 109         u64 mcastbcast;
 110         u64 untagged;
 111         u64 vlan;
 112         u64 s_64;
 113         u64 s_65_127;
 114         u64 s_128_255;
 115         u64 s_256_511;
 116         u64 s_512_1023;
 117         u64 s_1024_1518;
 118         u64 s_1519_max;
 119 };
 120
 121 struct opa_vnic_stats {
 122         /* standard netdev statistics */
 123         struct rtnl_link_stats64 netstats;
 124
 125         /* OPA VNIC statistics */
 126         struct opa_vnic_grp_stats tx_grp;
 127         struct opa_vnic_grp_stats rx_grp;
 128         u64 tx_dlid_zero;
 129         u64 tx_drop_state;
 130         u64 rx_drop_state;
 131         u64 rx_runt;
 132         u64 rx_oversize;
 133 };
 134
 135 static inline bool rdma_cap_opa_vnic(struct ib_device *device)
 136 {
 137         return !!(device->attrs.device_cap_flags &
 138                   IB_DEVICE_RDMA_NETDEV_OPA_VNIC);
 139 }
 140
 141 #endif /* _OPA_VNIC_H */