271 lines
6.1 KiB
C
271 lines
6.1 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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/*
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* Copyright(c) 2020 Intel Corporation.
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*
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*/
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/*
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* This file contains HFI1 support for ipoib functionality
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*/
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#include "ipoib.h"
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#include "hfi.h"
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static u32 qpn_from_mac(u8 *mac_arr)
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{
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return (u32)mac_arr[1] << 16 | mac_arr[2] << 8 | mac_arr[3];
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}
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static int hfi1_ipoib_dev_init(struct net_device *dev)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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int ret;
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priv->netstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
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ret = priv->netdev_ops->ndo_init(dev);
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if (ret)
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return ret;
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ret = hfi1_netdev_add_data(priv->dd,
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qpn_from_mac(priv->netdev->dev_addr),
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dev);
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if (ret < 0) {
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priv->netdev_ops->ndo_uninit(dev);
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return ret;
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}
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return 0;
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}
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static void hfi1_ipoib_dev_uninit(struct net_device *dev)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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hfi1_netdev_remove_data(priv->dd, qpn_from_mac(priv->netdev->dev_addr));
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priv->netdev_ops->ndo_uninit(dev);
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}
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static int hfi1_ipoib_dev_open(struct net_device *dev)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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int ret;
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ret = priv->netdev_ops->ndo_open(dev);
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if (!ret) {
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struct hfi1_ibport *ibp = to_iport(priv->device,
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priv->port_num);
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struct rvt_qp *qp;
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u32 qpn = qpn_from_mac(priv->netdev->dev_addr);
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rcu_read_lock();
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qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
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if (!qp) {
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rcu_read_unlock();
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priv->netdev_ops->ndo_stop(dev);
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return -EINVAL;
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}
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rvt_get_qp(qp);
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priv->qp = qp;
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rcu_read_unlock();
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hfi1_netdev_enable_queues(priv->dd);
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hfi1_ipoib_napi_tx_enable(dev);
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}
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return ret;
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}
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static int hfi1_ipoib_dev_stop(struct net_device *dev)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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if (!priv->qp)
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return 0;
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hfi1_ipoib_napi_tx_disable(dev);
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hfi1_netdev_disable_queues(priv->dd);
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rvt_put_qp(priv->qp);
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priv->qp = NULL;
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return priv->netdev_ops->ndo_stop(dev);
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}
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static void hfi1_ipoib_dev_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *storage)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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netdev_stats_to_stats64(storage, &dev->stats);
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dev_fetch_sw_netstats(storage, priv->netstats);
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}
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static const struct net_device_ops hfi1_ipoib_netdev_ops = {
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.ndo_init = hfi1_ipoib_dev_init,
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.ndo_uninit = hfi1_ipoib_dev_uninit,
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.ndo_open = hfi1_ipoib_dev_open,
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.ndo_stop = hfi1_ipoib_dev_stop,
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.ndo_get_stats64 = hfi1_ipoib_dev_get_stats64,
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};
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static int hfi1_ipoib_send(struct net_device *dev,
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struct sk_buff *skb,
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struct ib_ah *address,
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u32 dqpn)
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{
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return hfi1_ipoib_send_dma(dev, skb, address, dqpn);
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}
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static int hfi1_ipoib_mcast_attach(struct net_device *dev,
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struct ib_device *device,
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union ib_gid *mgid,
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u16 mlid,
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int set_qkey,
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u32 qkey)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
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struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
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struct rvt_qp *qp;
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int ret = -EINVAL;
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rcu_read_lock();
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qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
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if (qp) {
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rvt_get_qp(qp);
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rcu_read_unlock();
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if (set_qkey)
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priv->qkey = qkey;
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/* attach QP to multicast group */
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ret = ib_attach_mcast(&qp->ibqp, mgid, mlid);
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rvt_put_qp(qp);
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} else {
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rcu_read_unlock();
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}
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return ret;
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}
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static int hfi1_ipoib_mcast_detach(struct net_device *dev,
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struct ib_device *device,
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union ib_gid *mgid,
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u16 mlid)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
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struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
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struct rvt_qp *qp;
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int ret = -EINVAL;
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rcu_read_lock();
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qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
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if (qp) {
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rvt_get_qp(qp);
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rcu_read_unlock();
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ret = ib_detach_mcast(&qp->ibqp, mgid, mlid);
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rvt_put_qp(qp);
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} else {
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rcu_read_unlock();
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}
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return ret;
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}
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static void hfi1_ipoib_netdev_dtor(struct net_device *dev)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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hfi1_ipoib_txreq_deinit(priv);
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hfi1_ipoib_rxq_deinit(priv->netdev);
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free_percpu(priv->netstats);
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}
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static void hfi1_ipoib_set_id(struct net_device *dev, int id)
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{
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struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
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priv->pkey_index = (u16)id;
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ib_query_pkey(priv->device,
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priv->port_num,
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priv->pkey_index,
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&priv->pkey);
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}
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static int hfi1_ipoib_setup_rn(struct ib_device *device,
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u8 port_num,
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struct net_device *netdev,
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void *param)
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{
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struct hfi1_devdata *dd = dd_from_ibdev(device);
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struct rdma_netdev *rn = netdev_priv(netdev);
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struct hfi1_ipoib_dev_priv *priv;
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int rc;
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rn->send = hfi1_ipoib_send;
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rn->attach_mcast = hfi1_ipoib_mcast_attach;
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rn->detach_mcast = hfi1_ipoib_mcast_detach;
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rn->set_id = hfi1_ipoib_set_id;
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rn->hca = device;
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rn->port_num = port_num;
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rn->mtu = netdev->mtu;
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priv = hfi1_ipoib_priv(netdev);
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priv->dd = dd;
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priv->netdev = netdev;
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priv->device = device;
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priv->port_num = port_num;
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priv->netdev_ops = netdev->netdev_ops;
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ib_query_pkey(device, port_num, priv->pkey_index, &priv->pkey);
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rc = hfi1_ipoib_txreq_init(priv);
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if (rc) {
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dd_dev_err(dd, "IPoIB netdev TX init - failed(%d)\n", rc);
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return rc;
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}
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rc = hfi1_ipoib_rxq_init(netdev);
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if (rc) {
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dd_dev_err(dd, "IPoIB netdev RX init - failed(%d)\n", rc);
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hfi1_ipoib_txreq_deinit(priv);
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return rc;
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}
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netdev->netdev_ops = &hfi1_ipoib_netdev_ops;
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netdev->priv_destructor = hfi1_ipoib_netdev_dtor;
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netdev->needs_free_netdev = true;
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return 0;
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}
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int hfi1_ipoib_rn_get_params(struct ib_device *device,
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u8 port_num,
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enum rdma_netdev_t type,
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struct rdma_netdev_alloc_params *params)
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{
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struct hfi1_devdata *dd = dd_from_ibdev(device);
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if (type != RDMA_NETDEV_IPOIB)
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return -EOPNOTSUPP;
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if (!HFI1_CAP_IS_KSET(AIP) || !dd->num_netdev_contexts)
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return -EOPNOTSUPP;
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if (!port_num || port_num > dd->num_pports)
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return -EINVAL;
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params->sizeof_priv = sizeof(struct hfi1_ipoib_rdma_netdev);
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params->txqs = dd->num_sdma;
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params->rxqs = dd->num_netdev_contexts;
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params->param = NULL;
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params->initialize_rdma_netdev = hfi1_ipoib_setup_rn;
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return 0;
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}
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