Merge branch 'gve-link-irqs-queues-and-napi-instances'

Joe Damato says:

====================
gve: Link IRQs, queues, and NAPI instances

This series uses the netdev-genl API to link IRQs and queues to NAPI IDs
so that this information is queryable by user apps. This is particularly
useful for epoll-based busy polling apps which rely on having access to
the NAPI ID.

I've tested these commits on a GCP instance with a GVE NIC configured
and have included test output in the commit messages for each patch
showing how to query the information.

[1]: https://lore.kernel.org/netdev/[email protected]/
====================

Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

drivers/net/ethernet/google/gve/gve_main.c

@@ -1875,6 +1875,11 @@ static void gve_turndown(struct gve_priv *priv)
 
 		if (!gve_tx_was_added_to_block(priv, idx))
 			continue;
+
+		if (idx < priv->tx_cfg.num_queues)
+			netif_queue_set_napi(priv->dev, idx,
+					     NETDEV_QUEUE_TYPE_TX, NULL);
+
 		napi_disable(&block->napi);
 	}
 	for (idx = 0; idx < priv->rx_cfg.num_queues; idx++) {
@@ -1883,6 +1888,9 @@ static void gve_turndown(struct gve_priv *priv)
 
 		if (!gve_rx_was_added_to_block(priv, idx))
 			continue;
+
+		netif_queue_set_napi(priv->dev, idx, NETDEV_QUEUE_TYPE_RX,
+				     NULL);
 		napi_disable(&block->napi);
 	}
 
@@ -1909,6 +1917,12 @@ static void gve_turnup(struct gve_priv *priv)
 			continue;
 
 		napi_enable(&block->napi);
+
+		if (idx < priv->tx_cfg.num_queues)
+			netif_queue_set_napi(priv->dev, idx,
+					     NETDEV_QUEUE_TYPE_TX,
+					     &block->napi);
+
 		if (gve_is_gqi(priv)) {
 			iowrite32be(0, gve_irq_doorbell(priv, block));
 		} else {
@@ -1931,6 +1945,9 @@ static void gve_turnup(struct gve_priv *priv)
 			continue;
 
 		napi_enable(&block->napi);
+		netif_queue_set_napi(priv->dev, idx, NETDEV_QUEUE_TYPE_RX,
+				     &block->napi);
+
 		if (gve_is_gqi(priv)) {
 			iowrite32be(0, gve_irq_doorbell(priv, block));
 		} else {

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)