netdev - [PATCH v7 net-next 5/7] net: ena: Recalculate TX state variables every device reset

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Message-ID: <20230323163610.1281468-6-shayagr@amazon.com>
Date:   Thu, 23 Mar 2023 18:36:08 +0200
From:   Shay Agroskin <shayagr@...zon.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>
CC:     Shay Agroskin <shayagr@...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>,
        "Arinzon, David" <darinzon@...zon.com>,
        "Itzko, Shahar" <itzko@...zon.com>,
        "Abboud, Osama" <osamaabb@...zon.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        "Jie Wang" <wangjie125@...wei.com>,
        Johannes Berg <johannes@...solutions.net>,
        Edward Cree <ecree.xilinx@...il.com>,
        Florian Westphal <fw@...len.de>,
        "Michal Kubiak" <michal.kubiak@...el.com>
Subject: [PATCH v7 net-next 5/7] net: ena: Recalculate TX state variables every device reset

With the ability to modify LLQ entry size, the size of packet's
payload that can be written directly to the device changes.
This patch makes the driver recalculate this information every device
negotiation (also called device reset).

Reviewed-by: Michal Kubiak <michal.kubiak@...el.com>
Signed-off-by: Shay Agroskin <shayagr@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 97da4d841df3..ed5b019d27ea 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3750,8 +3750,9 @@ static int ena_restore_device(struct ena_adapter *adapter)
 	struct ena_com_dev_get_features_ctx get_feat_ctx;
 	struct ena_com_dev *ena_dev = adapter->ena_dev;
 	struct pci_dev *pdev = adapter->pdev;
+	struct ena_ring *txr;
+	int rc, count, i;
 	bool wd_state;
-	int rc;
 
 	set_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
 	rc = ena_device_init(adapter, adapter->pdev, &get_feat_ctx, &wd_state);
@@ -3761,6 +3762,13 @@ static int ena_restore_device(struct ena_adapter *adapter)
 	}
 	adapter->wd_state = wd_state;
 
+	count =  adapter->xdp_num_queues + adapter->num_io_queues;
+	for (i = 0 ; i < count; i++) {
+		txr = &adapter->tx_ring[i];
+		txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
+		txr->tx_max_header_size = ena_dev->tx_max_header_size;
+	}
+
 	rc = ena_device_validate_params(adapter, &get_feat_ctx);
 	if (rc) {
 		dev_err(&pdev->dev, "Validation of device parameters failed\n");
-- 
2.25.1