1 files changed, 264 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 000000000..5d814afdf
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/ipoib_main.c
@@ -0,0 +1,264 @@
+// 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(const 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;
+
+	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+	if (!dev->tstats)
+		return -ENOMEM;
+
+	ret = priv->netdev_ops->ndo_init(dev);
+	if (ret)
+		goto out_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);
+		goto out_ret;
+	}
+
+	return 0;
+out_ret:
+	free_percpu(dev->tstats);
+	dev->tstats = NULL;
+	return ret;
+}
+
+static void hfi1_ipoib_dev_uninit(struct net_device *dev)
+{
+	struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
+
+	free_percpu(dev->tstats);
+	dev->tstats = NULL;
+
+	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 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  = dev_get_tstats64,
+};
+
+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(dev->tstats);
+	dev->tstats = NULL;
+}
+
+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,
+			       u32 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->tx_timeout = hfi1_ipoib_tx_timeout;
+	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;
+
+	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);
+		return rc;
+	}
+
+	rc = hfi1_ipoib_rxq_init(netdev);
+	if (rc) {
+		dd_dev_err(dd, "IPoIB netdev RX init - failed(%d)\n", rc);
+		hfi1_ipoib_txreq_deinit(priv);
+		return rc;
+	}
+
+	netdev->netdev_ops = &hfi1_ipoib_netdev_ops;
+
+	netdev->priv_destructor = hfi1_ipoib_netdev_dtor;
+	netdev->needs_free_netdev = true;
+
+	return 0;
+}
+
+int hfi1_ipoib_rn_get_params(struct ib_device *device,
+			     u32 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;
+}