[RFC net-next 2/2] gve: Map NAPI instances to queues

[Joe Damato <jdamato@fastly.com>]

Use the netdev-genl interface to map NAPI instances to queues so that
this information is accessible to user programs via netlink.

$ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
			 --dump queue-get --json='{"ifindex": 2}'

[{'id': 0, 'ifindex': 2, 'napi-id': 8313, 'type': 'rx'},
 {'id': 1, 'ifindex': 2, 'napi-id': 8314, 'type': 'rx'},
 {'id': 2, 'ifindex': 2, 'napi-id': 8315, 'type': 'rx'},
 {'id': 3, 'ifindex': 2, 'napi-id': 8316, 'type': 'rx'},
 {'id': 4, 'ifindex': 2, 'napi-id': 8317, 'type': 'rx'},
[...]
 {'id': 0, 'ifindex': 2, 'napi-id': 8297, 'type': 'tx'},
 {'id': 1, 'ifindex': 2, 'napi-id': 8298, 'type': 'tx'},
 {'id': 2, 'ifindex': 2, 'napi-id': 8299, 'type': 'tx'},
 {'id': 3, 'ifindex': 2, 'napi-id': 8300, 'type': 'tx'},
 {'id': 4, 'ifindex': 2, 'napi-id': 8301, 'type': 'tx'},
[...]

Signed-off-by: Joe Damato <jdamato@fastly.com>
---
 drivers/net/ethernet/google/gve/gve_main.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index 661566db68c8..da811e90bdfa 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -1875,6 +1875,9 @@ static void gve_turndown(struct gve_priv *priv)
 
 		if (!gve_tx_was_added_to_block(priv, idx))
 			continue;
+
+		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 +1886,9 @@ 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 +1915,9 @@ static void gve_turnup(struct gve_priv *priv)
 			continue;
 
 		napi_enable(&block->napi);
+		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 +1940,9 @@ 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 {
-- 
2.43.0