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Thu, 19 Mar 2026 00:51:49 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , "Alexei Starovoitov" , Daniel Borkmann , "Jesper Dangaard Brouer" , John Fastabend , , , , , Gal Pressman , Moshe Shemesh , Dragos Tatulea , Carolina Jubran Subject: [PATCH net-next 2/5] net/mlx5e: XDP, Improve dma address calculation of linear part for XDP_TX Date: Thu, 19 Mar 2026 09:50:33 +0200 Message-ID: <20260319075036.24734-3-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260319075036.24734-1-tariqt@nvidia.com> References: <20260319075036.24734-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF00000140:EE_|IA1PR12MB6065:EE_ X-MS-Office365-Filtering-Correlation-Id: 32bbc28d-422e-4ffe-7a91-08de858c6dbd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|7416014|376014|82310400026|1800799024|22082099003|18002099003|56012099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(7416014)(376014)(82310400026)(1800799024)(22082099003)(18002099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: BPCl5eNf3omxsSce9PevLJfoisIOcvfys4YYLhVSiwpFcnedslccRvADGijvRx3q9Zt9KMcBmNJQLLLDM27bidX4Rrp+utAYjLgB7tTKdOmdmmrR8LFwKzn7tVrJzdO5U+OPlXURHpLcKk5MN7PHk1Ev4U9AyjX58ktDEJI+qQ+DUCMGFH5oX/D99IXvs3c5mwkW5R9W7p0kpYQAd4V1B89E3L7PQc1KFhrFnKWW3bUE3ZfLgrnt3MzmPUFAHbp0Lkx1EuDRKPM1rgg2WgOhpIAGpj2u6A6JBFg8Lq2tzuGqscV/zjwVV/r++8VfjSA36VuZfvGZEP0ydBqdjmkwx+2QSr5w5woHygv7jEWUlmbLonAnssq5Zq1nBzF47DD3Y2PbqLrjCDq35vqOOddrknhlfRHxicfuHeI62vkygFssF+5iO8RBOSL6zOkxKFhr X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Mar 2026 07:52:11.4581 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 32bbc28d-422e-4ffe-7a91-08de858c6dbd X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF00000140.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6065 From: Dragos Tatulea When calculating the dma address of the linear part of an XDP frame, the formula assumes that there is a single XDP buffer per page. Extend the formula to allow multiple XDP buffers per page by calculating the data offset in the page. This is a preparation for the upcoming removal of a single XDP buffer per page limitation when the formula will no longer be correct. Signed-off-by: Dragos Tatulea Reviewed-by: Carolina Jubran Signed-off-by: Tariq Toukan --- drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c index 04e1b5fa4825..d3bab198c99c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c @@ -123,7 +123,7 @@ mlx5e_xmit_xdp_buff(struct mlx5e_xdpsq *sq, struct mlx5e_rq *rq, * mode. */ - dma_addr = page_pool_get_dma_addr(page) + (xdpf->data - (void *)xdpf); + dma_addr = page_pool_get_dma_addr(page) + offset_in_page(xdpf->data); dma_sync_single_for_device(sq->pdev, dma_addr, xdptxd->len, DMA_BIDIRECTIONAL); if (xdptxd->has_frags) { -- 2.44.0