1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) 2 /* 3 * Copyright(c) 2020 Intel Corporation. 4 * 5 */ 6 7 /* 8 * This file contains HFI1 support for ipoib functionality 9 */ 10 11 #include "ipoib.h" 12 #include "hfi.h" 13 14 static u32 qpn_from_mac(u8 *mac_arr) 15 { 16 return (u32)mac_arr[1] << 16 | mac_arr[2] << 8 | mac_arr[3]; 17 } 18 19 static int hfi1_ipoib_dev_init(struct net_device *dev) 20 { 21 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 22 int ret; 23 24 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 25 26 ret = priv->netdev_ops->ndo_init(dev); 27 if (ret) 28 return ret; 29 30 ret = hfi1_netdev_add_data(priv->dd, 31 qpn_from_mac(priv->netdev->dev_addr), 32 dev); 33 if (ret < 0) { 34 priv->netdev_ops->ndo_uninit(dev); 35 return ret; 36 } 37 38 return 0; 39 } 40 41 static void hfi1_ipoib_dev_uninit(struct net_device *dev) 42 { 43 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 44 45 hfi1_netdev_remove_data(priv->dd, qpn_from_mac(priv->netdev->dev_addr)); 46 47 priv->netdev_ops->ndo_uninit(dev); 48 } 49 50 static int hfi1_ipoib_dev_open(struct net_device *dev) 51 { 52 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 53 int ret; 54 55 ret = priv->netdev_ops->ndo_open(dev); 56 if (!ret) { 57 struct hfi1_ibport *ibp = to_iport(priv->device, 58 priv->port_num); 59 struct rvt_qp *qp; 60 u32 qpn = qpn_from_mac(priv->netdev->dev_addr); 61 62 rcu_read_lock(); 63 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn); 64 if (!qp) { 65 rcu_read_unlock(); 66 priv->netdev_ops->ndo_stop(dev); 67 return -EINVAL; 68 } 69 rvt_get_qp(qp); 70 priv->qp = qp; 71 rcu_read_unlock(); 72 73 hfi1_netdev_enable_queues(priv->dd); 74 hfi1_ipoib_napi_tx_enable(dev); 75 } 76 77 return ret; 78 } 79 80 static int hfi1_ipoib_dev_stop(struct net_device *dev) 81 { 82 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 83 84 if (!priv->qp) 85 return 0; 86 87 hfi1_ipoib_napi_tx_disable(dev); 88 hfi1_netdev_disable_queues(priv->dd); 89 90 rvt_put_qp(priv->qp); 91 priv->qp = NULL; 92 93 return priv->netdev_ops->ndo_stop(dev); 94 } 95 96 static const struct net_device_ops hfi1_ipoib_netdev_ops = { 97 .ndo_init = hfi1_ipoib_dev_init, 98 .ndo_uninit = hfi1_ipoib_dev_uninit, 99 .ndo_open = hfi1_ipoib_dev_open, 100 .ndo_stop = hfi1_ipoib_dev_stop, 101 .ndo_get_stats64 = dev_get_tstats64, 102 }; 103 104 static int hfi1_ipoib_send(struct net_device *dev, 105 struct sk_buff *skb, 106 struct ib_ah *address, 107 u32 dqpn) 108 { 109 return hfi1_ipoib_send_dma(dev, skb, address, dqpn); 110 } 111 112 static int hfi1_ipoib_mcast_attach(struct net_device *dev, 113 struct ib_device *device, 114 union ib_gid *mgid, 115 u16 mlid, 116 int set_qkey, 117 u32 qkey) 118 { 119 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 120 u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr); 121 struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num); 122 struct rvt_qp *qp; 123 int ret = -EINVAL; 124 125 rcu_read_lock(); 126 127 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn); 128 if (qp) { 129 rvt_get_qp(qp); 130 rcu_read_unlock(); 131 if (set_qkey) 132 priv->qkey = qkey; 133 134 /* attach QP to multicast group */ 135 ret = ib_attach_mcast(&qp->ibqp, mgid, mlid); 136 rvt_put_qp(qp); 137 } else { 138 rcu_read_unlock(); 139 } 140 141 return ret; 142 } 143 144 static int hfi1_ipoib_mcast_detach(struct net_device *dev, 145 struct ib_device *device, 146 union ib_gid *mgid, 147 u16 mlid) 148 { 149 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 150 u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr); 151 struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num); 152 struct rvt_qp *qp; 153 int ret = -EINVAL; 154 155 rcu_read_lock(); 156 157 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn); 158 if (qp) { 159 rvt_get_qp(qp); 160 rcu_read_unlock(); 161 ret = ib_detach_mcast(&qp->ibqp, mgid, mlid); 162 rvt_put_qp(qp); 163 } else { 164 rcu_read_unlock(); 165 } 166 return ret; 167 } 168 169 static void hfi1_ipoib_netdev_dtor(struct net_device *dev) 170 { 171 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 172 173 hfi1_ipoib_txreq_deinit(priv); 174 hfi1_ipoib_rxq_deinit(priv->netdev); 175 176 free_percpu(dev->tstats); 177 } 178 179 static void hfi1_ipoib_free_rdma_netdev(struct net_device *dev) 180 { 181 hfi1_ipoib_netdev_dtor(dev); 182 free_netdev(dev); 183 } 184 185 static void hfi1_ipoib_set_id(struct net_device *dev, int id) 186 { 187 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev); 188 189 priv->pkey_index = (u16)id; 190 ib_query_pkey(priv->device, 191 priv->port_num, 192 priv->pkey_index, 193 &priv->pkey); 194 } 195 196 static int hfi1_ipoib_setup_rn(struct ib_device *device, 197 u8 port_num, 198 struct net_device *netdev, 199 void *param) 200 { 201 struct hfi1_devdata *dd = dd_from_ibdev(device); 202 struct rdma_netdev *rn = netdev_priv(netdev); 203 struct hfi1_ipoib_dev_priv *priv; 204 int rc; 205 206 rn->send = hfi1_ipoib_send; 207 rn->attach_mcast = hfi1_ipoib_mcast_attach; 208 rn->detach_mcast = hfi1_ipoib_mcast_detach; 209 rn->set_id = hfi1_ipoib_set_id; 210 rn->hca = device; 211 rn->port_num = port_num; 212 rn->mtu = netdev->mtu; 213 214 priv = hfi1_ipoib_priv(netdev); 215 priv->dd = dd; 216 priv->netdev = netdev; 217 priv->device = device; 218 priv->port_num = port_num; 219 priv->netdev_ops = netdev->netdev_ops; 220 221 netdev->netdev_ops = &hfi1_ipoib_netdev_ops; 222 223 ib_query_pkey(device, port_num, priv->pkey_index, &priv->pkey); 224 225 rc = hfi1_ipoib_txreq_init(priv); 226 if (rc) { 227 dd_dev_err(dd, "IPoIB netdev TX init - failed(%d)\n", rc); 228 hfi1_ipoib_free_rdma_netdev(netdev); 229 return rc; 230 } 231 232 rc = hfi1_ipoib_rxq_init(netdev); 233 if (rc) { 234 dd_dev_err(dd, "IPoIB netdev RX init - failed(%d)\n", rc); 235 hfi1_ipoib_free_rdma_netdev(netdev); 236 return rc; 237 } 238 239 netdev->priv_destructor = hfi1_ipoib_netdev_dtor; 240 netdev->needs_free_netdev = true; 241 242 return 0; 243 } 244 245 int hfi1_ipoib_rn_get_params(struct ib_device *device, 246 u8 port_num, 247 enum rdma_netdev_t type, 248 struct rdma_netdev_alloc_params *params) 249 { 250 struct hfi1_devdata *dd = dd_from_ibdev(device); 251 252 if (type != RDMA_NETDEV_IPOIB) 253 return -EOPNOTSUPP; 254 255 if (!HFI1_CAP_IS_KSET(AIP) || !dd->num_netdev_contexts) 256 return -EOPNOTSUPP; 257 258 if (!port_num || port_num > dd->num_pports) 259 return -EINVAL; 260 261 params->sizeof_priv = sizeof(struct hfi1_ipoib_rdma_netdev); 262 params->txqs = dd->num_sdma; 263 params->rxqs = dd->num_netdev_contexts; 264 params->param = NULL; 265 params->initialize_rdma_netdev = hfi1_ipoib_setup_rn; 266 267 return 0; 268 } 269