Use netdev-genl interface to map IRQs to NAPI instances so that this
information is accessible by user apps via netlink.

$ cat /proc/interrupts | grep gve | grep -v mgmnt | cut -f1 --delimiter=':'
 34
 35
 36
 37
 38
 39
 40
[...]
 65

$ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
                         --dump napi-get --json='{"ifindex": 2}'
[{'id': 8288, 'ifindex': 2, 'irq': 65},
  [...]
 {'id': 8263, 'ifindex': 2, 'irq': 40},
 {'id': 8262, 'ifindex': 2, 'irq': 39},
 {'id': 8261, 'ifindex': 2, 'irq': 38},
 {'id': 8260, 'ifindex': 2, 'irq': 37},
 {'id': 8259, 'ifindex': 2, 'irq': 36},
 {'id': 8258, 'ifindex': 2, 'irq': 35},
 {'id': 8257, 'ifindex': 2, 'irq': 34}]

Signed-off-by: Joe Damato <jdamato@fastly.com>
---
 v2:
   - Fix a spelling error in the commit message, pointed out by Simon
     Horman

 drivers/net/ethernet/google/gve/gve_utils.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c
index 2349750075a5..30fef100257e 100644
--- a/drivers/net/ethernet/google/gve/gve_utils.c
+++ b/drivers/net/ethernet/google/gve/gve_utils.c
@@ -111,6 +111,7 @@ void gve_add_napi(struct gve_priv *priv, int ntfy_idx,
 	struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
 
 	netif_napi_add(priv->dev, &block->napi, gve_poll);
+	netif_napi_set_irq(&block->napi, block->irq);
 }
 
 void gve_remove_napi(struct gve_priv *priv, int ntfy_idx)
-- 
2.43.0

On Mon, Sep 30, 2024 at 2:07 PM Joe Damato <jdamato@fastly.com> wrote:
>
> Use netdev-genl interface to map IRQs to NAPI instances so that this
> information is accessible by user apps via netlink.
>
> $ cat /proc/interrupts | grep gve | grep -v mgmnt | cut -f1 --delimiter=':'
>  34
>  35
>  36
>  37
>  38
>  39
>  40
> [...]
>  65
>
> $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
>                          --dump napi-get --json='{"ifindex": 2}'
> [{'id': 8288, 'ifindex': 2, 'irq': 65},
>   [...]
>  {'id': 8263, 'ifindex': 2, 'irq': 40},
>  {'id': 8262, 'ifindex': 2, 'irq': 39},
>  {'id': 8261, 'ifindex': 2, 'irq': 38},
>  {'id': 8260, 'ifindex': 2, 'irq': 37},
>  {'id': 8259, 'ifindex': 2, 'irq': 36},
>  {'id': 8258, 'ifindex': 2, 'irq': 35},
>  {'id': 8257, 'ifindex': 2, 'irq': 34}]
>
> Signed-off-by: Joe Damato <jdamato@fastly.com>

Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>