IB/ipoib: Add capability to switch between datagram and connected mode
This is the prerequisite modification to the ipoib ulp to allow a rdma netdev to obtain the default ndo ops for init/uninit/open/close. This is accomplished by setting the netdev ops field within the callback function passed to the netdev allocation routine which in turn was passed into the rdma netdev allocation routine. This allows the rdma netdev to call back into the ulp to create the resources required for connected mode operation. Additionally as the ulp is not re-entrant, when switching modes, the number of real tx queues is set to 1 for the connected mode. For datagram mode the number of real tx queues is set to the actual number of tx queues specified at the netdev's allocation. For the internal ulp netdev the number of tx queues defaults to 1. It is up to the rdma netdev to specify the actual number it can support. When the driver does not support a rdma netdev for acceleration, (-ENOTSUPPORTED return code or the verbs function for allocation is NULL) the ipoib ulp functions are unaffected by using the internal netdev allocated by the ipoib ulp. Link: https://lore.kernel.org/r/20200511160706.173205.19086.stgit@awfm-01.aw.intel.com Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Gary Leshner <Gary.S.Leshner@intel.com> Signed-off-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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Родитель
7638c0e965
Коммит
8f149b6847
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@ -526,6 +526,7 @@ int ipoib_set_mode(struct net_device *dev, const char *buf)
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"will cause multicast packet drops\n");
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netdev_update_features(dev);
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dev_set_mtu(dev, ipoib_cm_max_mtu(dev));
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netif_set_real_num_tx_queues(dev, 1);
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rtnl_unlock();
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priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
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@ -537,6 +538,7 @@ int ipoib_set_mode(struct net_device *dev, const char *buf)
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clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
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netdev_update_features(dev);
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dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
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netif_set_real_num_tx_queues(dev, dev->num_tx_queues);
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rtnl_unlock();
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ipoib_flush_paths(dev);
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return (!rtnl_trylock()) ? -EBUSY : 0;
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@ -2071,9 +2073,17 @@ static const struct net_device_ops ipoib_netdev_ops_vf = {
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.ndo_do_ioctl = ipoib_ioctl,
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};
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static const struct net_device_ops ipoib_netdev_default_pf = {
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.ndo_init = ipoib_dev_init_default,
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.ndo_uninit = ipoib_dev_uninit_default,
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.ndo_open = ipoib_ib_dev_open_default,
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.ndo_stop = ipoib_ib_dev_stop_default,
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};
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void ipoib_setup_common(struct net_device *dev)
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{
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dev->header_ops = &ipoib_header_ops;
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dev->netdev_ops = &ipoib_netdev_default_pf;
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ipoib_set_ethtool_ops(dev);
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@ -2123,13 +2133,6 @@ static void ipoib_build_priv(struct net_device *dev)
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INIT_DELAYED_WORK(&priv->neigh_reap_task, ipoib_reap_neigh);
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}
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static const struct net_device_ops ipoib_netdev_default_pf = {
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.ndo_init = ipoib_dev_init_default,
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.ndo_uninit = ipoib_dev_uninit_default,
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.ndo_open = ipoib_ib_dev_open_default,
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.ndo_stop = ipoib_ib_dev_stop_default,
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};
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static struct net_device *ipoib_alloc_netdev(struct ib_device *hca, u8 port,
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const char *name)
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{
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@ -2167,7 +2170,6 @@ int ipoib_intf_init(struct ib_device *hca, u8 port, const char *name,
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if (rc != -EOPNOTSUPP)
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goto out;
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dev->netdev_ops = &ipoib_netdev_default_pf;
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rn->send = ipoib_send;
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rn->attach_mcast = ipoib_mcast_attach;
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rn->detach_mcast = ipoib_mcast_detach;
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