netdev - RE: [net-next v2 2/2] ena: Link queues to NAPIs

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Message-ID: <10bc83e9df17408a9f0dd7a56abc9dc1@amazon.com>
Date: Wed, 2 Oct 2024 06:28:18 +0000
From: "Arinzon, David" <darinzon@...zon.com>
To: Joe Damato <jdamato@...tly.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>
CC: "Agroskin, Shay" <shayagr@...zon.com>, "Kiyanovski, Arthur"
	<akiyano@...zon.com>, "Dagan, Noam" <ndagan@...zon.com>, "Bshara, Saeed"
	<saeedb@...zon.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Kamal Heib <kheib@...hat.com>, open list
	<linux-kernel@...r.kernel.org>
Subject: RE: [net-next v2 2/2] ena: Link queues to NAPIs

> Link queues to NAPIs using the netdev-genl API so this information is
> queryable.
> 
> $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
>                          --dump queue-get --json='{"ifindex": 2}'
> 
> [{'id': 0, 'ifindex': 2, 'napi-id': 8201, 'type': 'rx'},
>  {'id': 1, 'ifindex': 2, 'napi-id': 8202, 'type': 'rx'},
>  {'id': 2, 'ifindex': 2, 'napi-id': 8203, 'type': 'rx'},
>  {'id': 3, 'ifindex': 2, 'napi-id': 8204, 'type': 'rx'},
>  {'id': 4, 'ifindex': 2, 'napi-id': 8205, 'type': 'rx'},
>  {'id': 5, 'ifindex': 2, 'napi-id': 8206, 'type': 'rx'},
>  {'id': 6, 'ifindex': 2, 'napi-id': 8207, 'type': 'rx'},
>  {'id': 7, 'ifindex': 2, 'napi-id': 8208, 'type': 'rx'},
>  {'id': 0, 'ifindex': 2, 'napi-id': 8201, 'type': 'tx'},
>  {'id': 1, 'ifindex': 2, 'napi-id': 8202, 'type': 'tx'},
>  {'id': 2, 'ifindex': 2, 'napi-id': 8203, 'type': 'tx'},
>  {'id': 3, 'ifindex': 2, 'napi-id': 8204, 'type': 'tx'},
>  {'id': 4, 'ifindex': 2, 'napi-id': 8205, 'type': 'tx'},
>  {'id': 5, 'ifindex': 2, 'napi-id': 8206, 'type': 'tx'},
>  {'id': 6, 'ifindex': 2, 'napi-id': 8207, 'type': 'tx'},
>  {'id': 7, 'ifindex': 2, 'napi-id': 8208, 'type': 'tx'}]
> 
> Signed-off-by: Joe Damato <jdamato@...tly.com>
> ---
>  v2:
>    - Comments added to ena_napi_disable_in_range and
>      ena_napi_enable_in_range
>    - No functional changes
> 
>  drivers/net/ethernet/amazon/ena/ena_netdev.c | 28
> +++++++++++++++++---
>  1 file changed, 24 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> index 74ce9fa45cf8..96df20854eb9 100644
> --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> @@ -1821,20 +1821,40 @@ static void ena_napi_disable_in_range(struct
> ena_adapter *adapter,
>                                       int first_index,
>                                       int count)  {
> +       struct napi_struct *napi;
>         int i;
> 
> -       for (i = first_index; i < first_index + count; i++)
> -               napi_disable(&adapter->ena_napi[i].napi);
> +       for (i = first_index; i < first_index + count; i++) {
> +               napi = &adapter->ena_napi[i].napi;
> +               if (!ENA_IS_XDP_INDEX(adapter, i)) {
> +                       /* This API is supported for non-XDP queues only */
> +                       netif_queue_set_napi(adapter->netdev, i,
> +                                            NETDEV_QUEUE_TYPE_TX, NULL);
> +                       netif_queue_set_napi(adapter->netdev, i,
> +                                            NETDEV_QUEUE_TYPE_RX, NULL);
> +               }
> +               napi_disable(napi);
> +       }
>  }
> 
>  static void ena_napi_enable_in_range(struct ena_adapter *adapter,
>                                      int first_index,
>                                      int count)  {
> +       struct napi_struct *napi;
>         int i;
> 
> -       for (i = first_index; i < first_index + count; i++)
> -               napi_enable(&adapter->ena_napi[i].napi);
> +       for (i = first_index; i < first_index + count; i++) {
> +               napi = &adapter->ena_napi[i].napi;
> +               napi_enable(napi);
> +               if (!ENA_IS_XDP_INDEX(adapter, i)) {
> +                       /* This API is supported for non-XDP queues only */
> +                       netif_queue_set_napi(adapter->netdev, i,
> +                                            NETDEV_QUEUE_TYPE_RX, napi);
> +                       netif_queue_set_napi(adapter->netdev, i,
> +                                            NETDEV_QUEUE_TYPE_TX, napi);
> +               }
> +       }
>  }
> 
>  /* Configure the Rx forwarding */
> --
> 2.25.1

LGTM

Reviewed-by: David Arinzon <darinzon@...zon.com>