IB/hfi1: Activate the dummy netdev

As described in earlier patches, ipoib netdev will share receive
contexts with existing VNIC netdev through a dummy netdev. The
following changes are made to achieve that:
- Set up netdev receive contexts after user contexts. A function is
  added to count the available netdev receive contexts.
- Add functions to set/get receive map table free index.
- Rename NUM_VNIC_MAP_ENTRIES as NUM_NETDEV_MAP_ENTRIES.
- Let the dummy netdev own the receive contexts instead of VNIC.
- Allocate the dummy netdev when the hfi1 device is added and free it
  when the device is removed.
- Initialize AIP RSM rules when the IpoIb rxq is initialized and
  remove the rules when it is de-initialized.
- Convert VNIC to use the dummy netdev.

Link: https://lore.kernel.org/r/20200511160649.173205.4626.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: Sadanand Warrier <sadanand.warrier@intel.com>
Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/hfi1/ipoib_rx.c b/drivers/infiniband/hw/hfi1/ipoib_rx.c
index 606ac69eeea5..3afa7545242c 100644
--- a/drivers/infiniband/hw/hfi1/ipoib_rx.c
+++ b/drivers/infiniband/hw/hfi1/ipoib_rx.c
@@ -74,8 +74,15 @@ int hfi1_ipoib_rxq_init(struct net_device *netdev)
 {
 	struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
 	struct hfi1_devdata *dd = ipoib_priv->dd;
+	int ret;
 
-	return hfi1_netdev_rx_init(dd);
+	ret = hfi1_netdev_rx_init(dd);
+	if (ret)
+		return ret;
+
+	hfi1_init_aip_rsm(dd);
+
+	return ret;
 }
 
 void hfi1_ipoib_rxq_deinit(struct net_device *netdev)
@@ -83,5 +90,6 @@ void hfi1_ipoib_rxq_deinit(struct net_device *netdev)
 	struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
 	struct hfi1_devdata *dd = ipoib_priv->dd;
 
+	hfi1_deinit_aip_rsm(dd);
 	hfi1_netdev_rx_destroy(dd);
 }