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// 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;
}
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