drivers/infiniband/hw/hfi1/vnic.h

   1 #ifndef _HFI1_VNIC_H
   2 #define _HFI1_VNIC_H
   3 /*
   4  * Copyright(c) 2017 - 2020 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 #include <rdma/opa_vnic.h>
  51 #include "hfi.h"
  52 #include "sdma.h"
  53
  54 #define HFI1_VNIC_MAX_TXQ     16
  55 #define HFI1_VNIC_MAX_PAD     12
  56
  57 /* L4 header definitions */
  58 #define HFI1_VNIC_L4_HDR_OFFSET  OPA_VNIC_L2_HDR_LEN
  59
  60 #define HFI1_VNIC_GET_L4_HDR(data)   \
  61         (*((u16 *)((u8 *)(data) + HFI1_VNIC_L4_HDR_OFFSET)))
  62
  63 #define HFI1_VNIC_GET_VESWID(data)   \
  64         (HFI1_VNIC_GET_L4_HDR(data) & 0xFFF)
  65
  66 /* Service class */
  67 #define HFI1_VNIC_SC_OFFSET_LOW 6
  68 #define HFI1_VNIC_SC_OFFSET_HI  7
  69 #define HFI1_VNIC_SC_SHIFT      4
  70
  71 #define HFI1_VNIC_MAX_QUEUE 16
  72 #define HFI1_NUM_VNIC_CTXT 8
  73
  74 /**
  75  * struct hfi1_vnic_sdma - VNIC per Tx ring SDMA information
  76  * @dd - device data pointer
  77  * @sde - sdma engine
  78  * @vinfo - vnic info pointer
  79  * @wait - iowait structure
  80  * @stx - sdma tx request
  81  * @state - vnic Tx ring SDMA state
  82  * @q_idx - vnic Tx queue index
  83  */
  84 struct hfi1_vnic_sdma {
  85         struct hfi1_devdata *dd;
  86         struct sdma_engine  *sde;
  87         struct hfi1_vnic_vport_info *vinfo;
  88         struct iowait wait;
  89         struct sdma_txreq stx;
  90         unsigned int state;
  91         u8 q_idx;
  92         bool pkts_sent;
  93 };
  94
  95 /**
  96  * struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
  97  * @idx: queue index
  98  * @vinfo: pointer to vport information
  99  * @netdev: network device
 100  * @napi: netdev napi structure
 101  * @skbq: queue of received socket buffers
 102  */
 103 struct hfi1_vnic_rx_queue {
 104         u8                           idx;
 105         struct hfi1_vnic_vport_info *vinfo;
 106         struct net_device           *netdev;
 107         struct napi_struct           napi;
 108 };
 109
 110 /**
 111  * struct hfi1_vnic_vport_info - HFI1 VNIC virtual port information
 112  * @dd: device data pointer
 113  * @netdev: net device pointer
 114  * @flags: state flags
 115  * @lock: vport lock
 116  * @num_tx_q: number of transmit queues
 117  * @num_rx_q: number of receive queues
 118  * @vesw_id: virtual switch id
 119  * @rxq: Array of receive queues
 120  * @stats: per queue stats
 121  * @sdma: VNIC SDMA structure per TXQ
 122  */
 123 struct hfi1_vnic_vport_info {
 124         struct hfi1_devdata *dd;
 125         struct net_device   *netdev;
 126         unsigned long        flags;
 127
 128         /* Lock used around state updates */
 129         struct mutex         lock;
 130
 131         u8  num_tx_q;
 132         u8  num_rx_q;
 133         u16 vesw_id;
 134         struct hfi1_vnic_rx_queue rxq[HFI1_NUM_VNIC_CTXT];
 135
 136         struct opa_vnic_stats  stats[HFI1_VNIC_MAX_QUEUE];
 137         struct hfi1_vnic_sdma  sdma[HFI1_VNIC_MAX_TXQ];
 138 };
 139
 140 #define v_dbg(format, arg...) \
 141         netdev_dbg(vinfo->netdev, format, ## arg)
 142 #define v_err(format, arg...) \
 143         netdev_err(vinfo->netdev, format, ## arg)
 144 #define v_info(format, arg...) \
 145         netdev_info(vinfo->netdev, format, ## arg)
 146
 147 /* vnic hfi1 internal functions */
 148 void hfi1_vnic_setup(struct hfi1_devdata *dd);
 149 int hfi1_vnic_txreq_init(struct hfi1_devdata *dd);
 150 void hfi1_vnic_txreq_deinit(struct hfi1_devdata *dd);
 151
 152 void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
 153 void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo);
 154 bool hfi1_vnic_sdma_write_avail(struct hfi1_vnic_vport_info *vinfo,
 155                                 u8 q_idx);
 156
 157 /* vnic rdma netdev operations */
 158 struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
 159                                       u8 port_num,
 160                                       enum rdma_netdev_t type,
 161                                       const char *name,
 162                                       unsigned char name_assign_type,
 163                                       void (*setup)(struct net_device *));
 164 int hfi1_vnic_send_dma(struct hfi1_devdata *dd, u8 q_idx,
 165                        struct hfi1_vnic_vport_info *vinfo,
 166                        struct sk_buff *skb, u64 pbc, u8 plen);
 167
 168 #endif /* _HFI1_VNIC_H */