netdev - [PATCH v2 net-next 10/11] net: ena: handle ena_calc_io_queue

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Message-ID: <20240130095353.2881-11-darinzon@amazon.com>
Date: Tue, 30 Jan 2024 09:53:52 +0000
From: <darinzon@...zon.com>
To: "Nelson, Shannon" <shannon.nelson@....com>, David Miller
	<davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	<netdev@...r.kernel.org>
CC: David Arinzon <darinzon@...zon.com>, "Woodhouse, David" <dwmw@...zon.com>,
	"Machulsky, Zorik" <zorik@...zon.com>, "Matushevsky, Alexander"
	<matua@...zon.com>, Saeed Bshara <saeedb@...zon.com>, "Wilson, Matt"
	<msw@...zon.com>, "Liguori, Anthony" <aliguori@...zon.com>, "Bshara, Nafea"
	<nafea@...zon.com>, "Belgazal, Netanel" <netanel@...zon.com>, "Saidi, Ali"
	<alisaidi@...zon.com>, "Herrenschmidt, Benjamin" <benh@...zon.com>,
	"Kiyanovski, Arthur" <akiyano@...zon.com>, "Dagan, Noam" <ndagan@...zon.com>,
	"Agroskin, Shay" <shayagr@...zon.com>, "Itzko, Shahar" <itzko@...zon.com>,
	"Abboud, Osama" <osamaabb@...zon.com>, "Ostrovsky, Evgeny"
	<evostrov@...zon.com>, "Tabachnik, Ofir" <ofirt@...zon.com>, "Koler, Nati"
	<nkoler@...zon.com>
Subject: [PATCH v2 net-next 10/11] net: ena: handle ena_calc_io_queue_size() possible errors

From: David Arinzon <darinzon@...zon.com>

Fail queue size calculation when the device returns maximum
TX/RX queue sizes that are smaller than the allowed minimum.

Signed-off-by: Osama Abboud <osamaabb@...zon.com>
Signed-off-by: David Arinzon <darinzon@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 24 +++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 8d99904..965a01c 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2899,8 +2899,8 @@ static const struct net_device_ops ena_netdev_ops = {
 	.ndo_xdp_xmit		= ena_xdp_xmit,
 };
 
-static void ena_calc_io_queue_size(struct ena_adapter *adapter,
-				   struct ena_com_dev_get_features_ctx *get_feat_ctx)
+static int ena_calc_io_queue_size(struct ena_adapter *adapter,
+				  struct ena_com_dev_get_features_ctx *get_feat_ctx)
 {
 	struct ena_admin_feature_llq_desc *llq = &get_feat_ctx->llq;
 	struct ena_com_dev *ena_dev = adapter->ena_dev;
@@ -2959,6 +2959,18 @@ static void ena_calc_io_queue_size(struct ena_adapter *adapter,
 	max_tx_queue_size = rounddown_pow_of_two(max_tx_queue_size);
 	max_rx_queue_size = rounddown_pow_of_two(max_rx_queue_size);
 
+	if (max_tx_queue_size < ENA_MIN_RING_SIZE) {
+		netdev_err(adapter->netdev, "Device max TX queue size: %d < minimum: %d\n",
+			   max_tx_queue_size, ENA_MIN_RING_SIZE);
+		return -EINVAL;
+	}
+
+	if (max_rx_queue_size < ENA_MIN_RING_SIZE) {
+		netdev_err(adapter->netdev, "Device max RX queue size: %d < minimum: %d\n",
+			   max_rx_queue_size, ENA_MIN_RING_SIZE);
+		return -EINVAL;
+	}
+
 	/* When forcing large headers, we multiply the entry size by 2, and therefore divide
 	 * the queue size by 2, leaving the amount of memory used by the queues unchanged.
 	 */
@@ -2989,6 +3001,8 @@ static void ena_calc_io_queue_size(struct ena_adapter *adapter,
 	adapter->max_rx_ring_size = max_rx_queue_size;
 	adapter->requested_tx_ring_size = tx_queue_size;
 	adapter->requested_rx_ring_size = rx_queue_size;
+
+	return 0;
 }
 
 static int ena_device_validate_params(struct ena_adapter *adapter,
@@ -3190,11 +3204,15 @@ static int ena_device_init(struct ena_adapter *adapter, struct pci_dev *pdev,
 		goto err_admin_init;
 	}
 
-	ena_calc_io_queue_size(adapter, get_feat_ctx);
+	rc = ena_calc_io_queue_size(adapter, get_feat_ctx);
+	if (unlikely(rc))
+		goto err_admin_init;
 
 	return 0;
 
 err_admin_init:
+	ena_com_abort_admin_commands(ena_dev);
+	ena_com_wait_for_abort_completion(ena_dev);
 	ena_com_delete_host_info(ena_dev);
 	ena_com_admin_destroy(ena_dev);
 err_mmio_read_less:
-- 
2.40.1