drivers/infiniband/hw/hfi1/vnic.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
   2 /*
   3  * Copyright(c) 2017 - 2020 Intel Corporation.
   4  */
   5
   6 #ifndef _HFI1_VNIC_H
   7 #define _HFI1_VNIC_H
   8 #include <rdma/opa_vnic.h>
   9 #include "hfi.h"
  10 #include "sdma.h"
  11
  12 #define HFI1_VNIC_MAX_TXQ     16
  13 #define HFI1_VNIC_MAX_PAD     12
  14
  15 /* L4 header definitions */
  16 #define HFI1_VNIC_L4_HDR_OFFSET  OPA_VNIC_L2_HDR_LEN
  17
  18 #define HFI1_VNIC_GET_L4_HDR(data)   \
  19         (*((u16 *)((u8 *)(data) + HFI1_VNIC_L4_HDR_OFFSET)))
  20
  21 #define HFI1_VNIC_GET_VESWID(data)   \
  22         (HFI1_VNIC_GET_L4_HDR(data) & 0xFFF)
  23
  24 /* Service class */
  25 #define HFI1_VNIC_SC_OFFSET_LOW 6
  26 #define HFI1_VNIC_SC_OFFSET_HI  7
  27 #define HFI1_VNIC_SC_SHIFT      4
  28
  29 #define HFI1_VNIC_MAX_QUEUE 16
  30 #define HFI1_NUM_VNIC_CTXT 8
  31
  32 /**
  33  * struct hfi1_vnic_sdma - VNIC per Tx ring SDMA information
  34  * @dd - device data pointer
  35  * @sde - sdma engine
  36  * @vinfo - vnic info pointer
  37  * @wait - iowait structure
  38  * @stx - sdma tx request
  39  * @state - vnic Tx ring SDMA state
  40  * @q_idx - vnic Tx queue index
  41  */
  42 struct hfi1_vnic_sdma {
  43         struct hfi1_devdata *dd;
  44         struct sdma_engine  *sde;
  45         struct hfi1_vnic_vport_info *vinfo;
  46         struct iowait wait;
  47         struct sdma_txreq stx;
  48         unsigned int state;
  49         u8 q_idx;
  50         bool pkts_sent;
  51 };
  52
  53 /**
  54  * struct hfi1_vnic_rx_queue - HFI1 VNIC receive queue
  55  * @idx: queue index
  56  * @vinfo: pointer to vport information
  57  * @netdev: network device
  58  * @napi: netdev napi structure
  59  * @skbq: queue of received socket buffers
  60  */
  61 struct hfi1_vnic_rx_queue {
  62         u8                           idx;
  63         struct hfi1_vnic_vport_info *vinfo;
  64         struct net_device           *netdev;
  65         struct napi_struct           napi;
  66 };
  67
  68 /**
  69  * struct hfi1_vnic_vport_info - HFI1 VNIC virtual port information
  70  * @dd: device data pointer
  71  * @netdev: net device pointer
  72  * @flags: state flags
  73  * @lock: vport lock
  74  * @num_tx_q: number of transmit queues
  75  * @num_rx_q: number of receive queues
  76  * @vesw_id: virtual switch id
  77  * @rxq: Array of receive queues
  78  * @stats: per queue stats
  79  * @sdma: VNIC SDMA structure per TXQ
  80  */
  81 struct hfi1_vnic_vport_info {
  82         struct hfi1_devdata *dd;
  83         struct net_device   *netdev;
  84         unsigned long        flags;
  85
  86         /* Lock used around state updates */
  87         struct mutex         lock;
  88
  89         u8  num_tx_q;
  90         u8  num_rx_q;
  91         u16 vesw_id;
  92         struct hfi1_vnic_rx_queue rxq[HFI1_NUM_VNIC_CTXT];
  93
  94         struct opa_vnic_stats  stats[HFI1_VNIC_MAX_QUEUE];
  95         struct hfi1_vnic_sdma  sdma[HFI1_VNIC_MAX_TXQ];
  96 };
  97
  98 #define v_dbg(format, arg...) \
  99         netdev_dbg(vinfo->netdev, format, ## arg)
 100 #define v_err(format, arg...) \
 101         netdev_err(vinfo->netdev, format, ## arg)
 102 #define v_info(format, arg...) \
 103         netdev_info(vinfo->netdev, format, ## arg)
 104
 105 /* vnic hfi1 internal functions */
 106 void hfi1_vnic_setup(struct hfi1_devdata *dd);
 107 int hfi1_vnic_txreq_init(struct hfi1_devdata *dd);
 108 void hfi1_vnic_txreq_deinit(struct hfi1_devdata *dd);
 109
 110 void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet);
 111 void hfi1_vnic_sdma_init(struct hfi1_vnic_vport_info *vinfo);
 112 bool hfi1_vnic_sdma_write_avail(struct hfi1_vnic_vport_info *vinfo,
 113                                 u8 q_idx);
 114
 115 /* vnic rdma netdev operations */
 116 struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
 117                                       u32 port_num,
 118                                       enum rdma_netdev_t type,
 119                                       const char *name,
 120                                       unsigned char name_assign_type,
 121                                       void (*setup)(struct net_device *));
 122 int hfi1_vnic_send_dma(struct hfi1_devdata *dd, u8 q_idx,
 123                        struct hfi1_vnic_vport_info *vinfo,
 124                        struct sk_buff *skb, u64 pbc, u8 plen);
 125
 126 #endif /* _HFI1_VNIC_H */