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RDMA/mana_ib: Handle net event for pointing to the current netdev

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When running under Hyper-V, the master device to the RDMA device is always
bonded to this RDMA device. This is not user-configurable.

The master device can be unbind/bind from the kernel. During those events,
the RDMA device should set to the current netdev to reflect the change of
master device from those events.

Signed-off-by: Long Li <longli@microsoft.com>
Link: https://patch.msgid.link/1741821332-9392-2-git-send-email-longli@linuxonhyperv.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Long Li 2025-03-12 16:15:32 -07:00 committed by Leon Romanovsky
parent a8445cfec1
commit bee35b7161
2 changed files with 46 additions and 2 deletions
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47
drivers/infiniband/hw/mana/device.c
View File

@ -65,6 +65,38 @@ static const struct ib_device_ops mana_ib_stats_ops = {
.get_hw_stats = mana_ib_get_hw_stats,
};
static int mana_ib_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct mana_ib_dev *dev = container_of(this, struct mana_ib_dev, nb);
struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
struct gdma_context *gc = dev->gdma_dev->gdma_context;
struct mana_context *mc = gc->mana.driver_data;
struct net_device *ndev;
/* Only process events from our parent device */
if (event_dev != mc->ports[0])
return NOTIFY_DONE;
switch (event) {
case NETDEV_CHANGEUPPER:
ndev = mana_get_primary_netdev(mc, 0, &dev->dev_tracker);
/*
* RDMA core will setup GID based on updated netdev.
* It's not possible to race with the core as rtnl lock is being
* held.
*/
ib_device_set_netdev(&dev->ib_dev, ndev, 1);
/* mana_get_primary_netdev() returns ndev with refcount held */
netdev_put(ndev, &dev->dev_tracker);
return NOTIFY_OK;
default:
return NOTIFY_DONE;
}
}
static int mana_ib_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
@ -122,11 +154,19 @@ static int mana_ib_probe(struct auxiliary_device *adev,
}
dev->gdma_dev = &mdev->gdma_context->mana_ib;
dev->nb.notifier_call = mana_ib_netdev_event;
ret = register_netdevice_notifier(&dev->nb);
if (ret) {
ibdev_err(&dev->ib_dev, "Failed to register net notifier, %d",
ret);
goto deregister_device;
}
ret = mana_ib_gd_query_adapter_caps(dev);
if (ret) {
ibdev_err(&dev->ib_dev, "Failed to query device caps, ret %d",
ret);
goto deregister_device;
goto deregister_net_notifier;
}
ib_set_device_ops(&dev->ib_dev, &mana_ib_stats_ops);
@ -134,7 +174,7 @@ static int mana_ib_probe(struct auxiliary_device *adev,
ret = mana_ib_create_eqs(dev);
if (ret) {
ibdev_err(&dev->ib_dev, "Failed to create EQs, ret %d", ret);
goto deregister_device;
goto deregister_net_notifier;
}
ret = mana_ib_gd_create_rnic_adapter(dev);
@ -172,6 +212,8 @@ static int mana_ib_probe(struct auxiliary_device *adev,
mana_ib_gd_destroy_rnic_adapter(dev);
destroy_eqs:
mana_ib_destroy_eqs(dev);
deregister_net_notifier:
unregister_netdevice_notifier(&dev->nb);
deregister_device:
mana_gd_deregister_device(dev->gdma_dev);
free_ib_device:
@ -188,6 +230,7 @@ static void mana_ib_remove(struct auxiliary_device *adev)
xa_destroy(&dev->qp_table_wq);
mana_ib_gd_destroy_rnic_adapter(dev);
mana_ib_destroy_eqs(dev);
unregister_netdevice_notifier(&dev->nb);
mana_gd_deregister_device(dev->gdma_dev);
ib_dealloc_device(&dev->ib_dev);
}

1
drivers/infiniband/hw/mana/mana_ib.h
View File

@ -79,6 +79,7 @@ struct mana_ib_dev {
struct mana_ib_adapter_caps adapter_caps;
struct dma_pool *av_pool;
netdevice_tracker dev_tracker;
struct notifier_block nb;
};
struct mana_ib_wq {