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path: root/drivers/infiniband/hw/hfi1/ipoib_main.c
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Diffstat (limited to 'drivers/infiniband/hw/hfi1/ipoib_main.c')
-rw-r--r--drivers/infiniband/hw/hfi1/ipoib_main.c309
1 files changed, 309 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/ipoib_main.c b/drivers/infiniband/hw/hfi1/ipoib_main.c
new file mode 100644
index 000000000000..014351ebbefa
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/ipoib_main.c
@@ -0,0 +1,309 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * Copyright(c) 2020 Intel Corporation.
+ *
+ */
+
+/*
+ * This file contains HFI1 support for ipoib functionality
+ */
+
+#include "ipoib.h"
+#include "hfi.h"
+
+static u32 qpn_from_mac(u8 *mac_arr)
+{
+ return (u32)mac_arr[1] << 16 | mac_arr[2] << 8 | mac_arr[3];
+}
+
+static int hfi1_ipoib_dev_init(struct net_device *dev)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+ int ret;
+
+ priv->netstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+
+ ret = priv->netdev_ops->ndo_init(dev);
+ if (ret)
+ return ret;
+
+ ret = hfi1_netdev_add_data(priv->dd,
+ qpn_from_mac(priv->netdev->dev_addr),
+ dev);
+ if (ret < 0) {
+ priv->netdev_ops->ndo_uninit(dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void hfi1_ipoib_dev_uninit(struct net_device *dev)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+
+ hfi1_netdev_remove_data(priv->dd, qpn_from_mac(priv->netdev->dev_addr));
+
+ priv->netdev_ops->ndo_uninit(dev);
+}
+
+static int hfi1_ipoib_dev_open(struct net_device *dev)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+ int ret;
+
+ ret = priv->netdev_ops->ndo_open(dev);
+ if (!ret) {
+ struct hfi1_ibport *ibp = to_iport(priv->device,
+ priv->port_num);
+ struct rvt_qp *qp;
+ u32 qpn = qpn_from_mac(priv->netdev->dev_addr);
+
+ rcu_read_lock();
+ qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
+ if (!qp) {
+ rcu_read_unlock();
+ priv->netdev_ops->ndo_stop(dev);
+ return -EINVAL;
+ }
+ rvt_get_qp(qp);
+ priv->qp = qp;
+ rcu_read_unlock();
+
+ hfi1_netdev_enable_queues(priv->dd);
+ hfi1_ipoib_napi_tx_enable(dev);
+ }
+
+ return ret;
+}
+
+static int hfi1_ipoib_dev_stop(struct net_device *dev)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+
+ if (!priv->qp)
+ return 0;
+
+ hfi1_ipoib_napi_tx_disable(dev);
+ hfi1_netdev_disable_queues(priv->dd);
+
+ rvt_put_qp(priv->qp);
+ priv->qp = NULL;
+
+ return priv->netdev_ops->ndo_stop(dev);
+}
+
+static void hfi1_ipoib_dev_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *storage)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+ u64 rx_packets = 0ull;
+ u64 rx_bytes = 0ull;
+ u64 tx_packets = 0ull;
+ u64 tx_bytes = 0ull;
+ int i;
+
+ netdev_stats_to_stats64(storage, &dev->stats);
+
+ for_each_possible_cpu(i) {
+ const struct pcpu_sw_netstats *stats;
+ unsigned int start;
+ u64 trx_packets;
+ u64 trx_bytes;
+ u64 ttx_packets;
+ u64 ttx_bytes;
+
+ stats = per_cpu_ptr(priv->netstats, i);
+ do {
+ start = u64_stats_fetch_begin_irq(&stats->syncp);
+ trx_packets = stats->rx_packets;
+ trx_bytes = stats->rx_bytes;
+ ttx_packets = stats->tx_packets;
+ ttx_bytes = stats->tx_bytes;
+ } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
+
+ rx_packets += trx_packets;
+ rx_bytes += trx_bytes;
+ tx_packets += ttx_packets;
+ tx_bytes += ttx_bytes;
+ }
+
+ storage->rx_packets += rx_packets;
+ storage->rx_bytes += rx_bytes;
+ storage->tx_packets += tx_packets;
+ storage->tx_bytes += tx_bytes;
+}
+
+static const struct net_device_ops hfi1_ipoib_netdev_ops = {
+ .ndo_init = hfi1_ipoib_dev_init,
+ .ndo_uninit = hfi1_ipoib_dev_uninit,
+ .ndo_open = hfi1_ipoib_dev_open,
+ .ndo_stop = hfi1_ipoib_dev_stop,
+ .ndo_get_stats64 = hfi1_ipoib_dev_get_stats64,
+};
+
+static int hfi1_ipoib_send(struct net_device *dev,
+ struct sk_buff *skb,
+ struct ib_ah *address,
+ u32 dqpn)
+{
+ return hfi1_ipoib_send_dma(dev, skb, address, dqpn);
+}
+
+static int hfi1_ipoib_mcast_attach(struct net_device *dev,
+ struct ib_device *device,
+ union ib_gid *mgid,
+ u16 mlid,
+ int set_qkey,
+ u32 qkey)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+ u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
+ struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
+ struct rvt_qp *qp;
+ int ret = -EINVAL;
+
+ rcu_read_lock();
+
+ qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
+ if (qp) {
+ rvt_get_qp(qp);
+ rcu_read_unlock();
+ if (set_qkey)
+ priv->qkey = qkey;
+
+ /* attach QP to multicast group */
+ ret = ib_attach_mcast(&qp->ibqp, mgid, mlid);
+ rvt_put_qp(qp);
+ } else {
+ rcu_read_unlock();
+ }
+
+ return ret;
+}
+
+static int hfi1_ipoib_mcast_detach(struct net_device *dev,
+ struct ib_device *device,
+ union ib_gid *mgid,
+ u16 mlid)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+ u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
+ struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
+ struct rvt_qp *qp;
+ int ret = -EINVAL;
+
+ rcu_read_lock();
+
+ qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
+ if (qp) {
+ rvt_get_qp(qp);
+ rcu_read_unlock();
+ ret = ib_detach_mcast(&qp->ibqp, mgid, mlid);
+ rvt_put_qp(qp);
+ } else {
+ rcu_read_unlock();
+ }
+ return ret;
+}
+
+static void hfi1_ipoib_netdev_dtor(struct net_device *dev)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+
+ hfi1_ipoib_txreq_deinit(priv);
+ hfi1_ipoib_rxq_deinit(priv->netdev);
+
+ free_percpu(priv->netstats);
+}
+
+static void hfi1_ipoib_free_rdma_netdev(struct net_device *dev)
+{
+ hfi1_ipoib_netdev_dtor(dev);
+ free_netdev(dev);
+}
+
+static void hfi1_ipoib_set_id(struct net_device *dev, int id)
+{
+ struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+
+ priv->pkey_index = (u16)id;
+ ib_query_pkey(priv->device,
+ priv->port_num,
+ priv->pkey_index,
+ &priv->pkey);
+}
+
+static int hfi1_ipoib_setup_rn(struct ib_device *device,
+ u8 port_num,
+ struct net_device *netdev,
+ void *param)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(device);
+ struct rdma_netdev *rn = netdev_priv(netdev);
+ struct hfi1_ipoib_dev_priv *priv;
+ int rc;
+
+ rn->send = hfi1_ipoib_send;
+ rn->attach_mcast = hfi1_ipoib_mcast_attach;
+ rn->detach_mcast = hfi1_ipoib_mcast_detach;
+ rn->set_id = hfi1_ipoib_set_id;
+ rn->hca = device;
+ rn->port_num = port_num;
+ rn->mtu = netdev->mtu;
+
+ priv = hfi1_ipoib_priv(netdev);
+ priv->dd = dd;
+ priv->netdev = netdev;
+ priv->device = device;
+ priv->port_num = port_num;
+ priv->netdev_ops = netdev->netdev_ops;
+
+ netdev->netdev_ops = &hfi1_ipoib_netdev_ops;
+
+ ib_query_pkey(device, port_num, priv->pkey_index, &priv->pkey);
+
+ rc = hfi1_ipoib_txreq_init(priv);
+ if (rc) {
+ dd_dev_err(dd, "IPoIB netdev TX init - failed(%d)\n", rc);
+ hfi1_ipoib_free_rdma_netdev(netdev);
+ return rc;
+ }
+
+ rc = hfi1_ipoib_rxq_init(netdev);
+ if (rc) {
+ dd_dev_err(dd, "IPoIB netdev RX init - failed(%d)\n", rc);
+ hfi1_ipoib_free_rdma_netdev(netdev);
+ return rc;
+ }
+
+ netdev->priv_destructor = hfi1_ipoib_netdev_dtor;
+ netdev->needs_free_netdev = true;
+
+ return 0;
+}
+
+int hfi1_ipoib_rn_get_params(struct ib_device *device,
+ u8 port_num,
+ enum rdma_netdev_t type,
+ struct rdma_netdev_alloc_params *params)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(device);
+
+ if (type != RDMA_NETDEV_IPOIB)
+ return -EOPNOTSUPP;
+
+ if (!HFI1_CAP_IS_KSET(AIP) || !dd->num_netdev_contexts)
+ return -EOPNOTSUPP;
+
+ if (!port_num || port_num > dd->num_pports)
+ return -EINVAL;
+
+ params->sizeof_priv = sizeof(struct hfi1_ipoib_rdma_netdev);
+ params->txqs = dd->num_sdma;
+ params->rxqs = dd->num_netdev_contexts;
+ params->param = NULL;
+ params->initialize_rdma_netdev = hfi1_ipoib_setup_rn;
+
+ return 0;
+}
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