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

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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/20240926030025.226221-1-jdamato@fastly.com/
====================

Link: https://patch.msgid.link/20240930210731.1629-1-jdamato@fastly.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-10-03 16:58:27 -07:00
commit b7074e4375
2 changed files with 18 additions and 0 deletions
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17
drivers/net/ethernet/google/gve/gve_main.c
View File

@ -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 {

1
drivers/net/ethernet/google/gve/gve_utils.c
View File

@ -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)