netdev - [RFC PATCH net-next 4/9] gve: Make gve_turn(up|down) ignore stopped queues

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Message-ID: <20240418195159.3461151-5-shailend@google.com>
Date: Thu, 18 Apr 2024 19:51:54 +0000
From: Shailend Chand <shailend@...gle.com>
To: netdev@...r.kernel.org
Cc: almasrymina@...gle.com, davem@...emloft.net, edumazet@...gle.com, 
	kuba@...nel.org, pabeni@...hat.com, willemb@...gle.com, 
	Shailend Chand <shailend@...gle.com>
Subject: [RFC PATCH net-next 4/9] gve: Make gve_turn(up|down) ignore stopped queues

Currently the queues are either all live or all dead, toggling from one
state to the other via the ndo open and stop hooks. The future addition
of single-queue ndo hooks changes this, and thus gve_turnup and
gve_turndown should evolve to account for a state where some queues are
live and some aren't.

Signed-off-by: Shailend Chand <shailend@...gle.com>
---
 drivers/net/ethernet/google/gve/gve_main.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index a515e5af843c..8e875b598e78 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -1965,12 +1965,16 @@ static void gve_turndown(struct gve_priv *priv)
 		int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx);
 		struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
 
+		if (!gve_tx_was_added_to_block(priv, idx))
+			continue;
 		napi_disable(&block->napi);
 	}
 	for (idx = 0; idx < priv->rx_cfg.num_queues; idx++) {
 		int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx);
 		struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
 
+		if (!gve_rx_was_added_to_block(priv, idx))
+			continue;
 		napi_disable(&block->napi);
 	}
 
@@ -1993,6 +1997,9 @@ static void gve_turnup(struct gve_priv *priv)
 		int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx);
 		struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
 
+		if (!gve_tx_was_added_to_block(priv, idx))
+			continue;
+
 		napi_enable(&block->napi);
 		if (gve_is_gqi(priv)) {
 			iowrite32be(0, gve_irq_doorbell(priv, block));
@@ -2005,6 +2012,9 @@ static void gve_turnup(struct gve_priv *priv)
 		int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx);
 		struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
 
+		if (!gve_rx_was_added_to_block(priv, idx))
+			continue;
+
 		napi_enable(&block->napi);
 		if (gve_is_gqi(priv)) {
 			iowrite32be(0, gve_irq_doorbell(priv, block));
-- 
2.44.0.769.g3c40516874-goog