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Thu, 11 Jun 2026 13:57:58 -0500 Received: from fllv0122.itg.ti.com (fllv0122.itg.ti.com [10.247.120.72]) by fllvem-mr08.itg.ti.com (8.18.1/8.18.1) with ESMTP id 65BIvvoA3923985; Thu, 11 Jun 2026 13:57:57 -0500 Received: from localhost (ti.dhcp.ti.com [172.24.231.93]) by fllv0122.itg.ti.com (8.14.7/8.14.7) with ESMTP id 65BIvvMn013190; Thu, 11 Jun 2026 13:57:57 -0500 From: Meghana Malladi To: , , , , , , , , , , , , , , , , CC: , , , , , Vignesh Raghavendra , Roger Quadros , Subject: [PATCH net 3/4] net: ti: icssg: Use undirected TX tag for XDP zero copy in HSR offload mode Date: Fri, 12 Jun 2026 00:27:43 +0530 Message-ID: <20260611185744.2498070-4-m-malladi@ti.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260611185744.2498070-1-m-malladi@ti.com> References: <20260611185744.2498070-1-m-malladi@ti.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-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D1:EE_|SA1PR10MB6293:EE_ X-MS-Office365-Filtering-Correlation-Id: b96d5fc9-add7-4c29-9112-08dec7eb5c2a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|7416014|1800799024|36860700016|376014|23010399003|22082099003|18002099003|921020|56012099006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 2ZMkYmlb0SyWW2k4Nn3dSquX/sMPckwQ9yYvHJWEgHU+bHyKD0yozyRcjBc8xMnsz09GPLv7Et/hVtv7An8CtXsFlFwLXGoWLe/a229fMmzwvYi248O4+GoxAEatwWaIPec9+3R37xm14Gwin0hD6gqGNkU4FO7NXWeCvKl/tJj5dp4S4LidxXWPZ35gkhNhVWSxFGECicxlgENGT6DVv2fBqg7aw/dBnLRWCV12UI0yq0HeCyNSS1bj6yo4wMNV0K4t+rD94HTHtIRJ9DVJQ2DwzDU+JHtdeHDW4jsgQJw3ihGmYp69/NzSoU2zdAjIhMRtDd8IYupV2EM/quUmwaUvGYfQMiDJgZZnUCZUyYlF+/dbwnVjD3FDwJGncWTsjASF2zMcS703geX3JLPZjylX9VyQjoD884k68ZXbPdU3SW6BI8eWw3rfooiecq++ X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2026 18:58:00.9928 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b96d5fc9-add7-4c29-9112-08dec7eb5c2a X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D1.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR10MB6293 emac_xsk_xmit_zc() has the same issue as the fixed emac_xmit_xdp_frame(): it always sets the CPPI5 descriptor destination tag to emac->port_id, which directs the PRU firmware to transmit on only one slave port in HSR mode, breaking redundancy. Apply the same fix: in HSR offload mode when NETIF_F_HW_HSR_DUP is set, use PRUETH_UNDIRECTED_PKT_DST_TAG (port 0) so the PRU duplicates frames to both ports. Also set PRUETH_UNDIRECTED_PKT_TAG_INS when NETIF_F_HW_HSR_TAG_INS is set so the PRU re-inserts the HSR sequence tag that was stripped by the PRU on RX before the XDP program saw the frame. This ensures XSK XDP_TX frames in HSR mode are treated identically to skb TX via hsr0. Fixes: 8756ef2eb078 ("net: ti: icssg-prueth: Add AF_XDP zero copy for TX") Signed-off-by: Meghana Malladi --- drivers/net/ethernet/ti/icssg/icssg_common.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c index ede32f266729..82ddef9c17d5 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_common.c +++ b/drivers/net/ethernet/ti/icssg/icssg_common.c @@ -105,6 +105,7 @@ static int emac_xsk_xmit_zc(struct prueth_emac *emac, struct xdp_desc xdp_desc; int num_tx = 0, pkt_len; int descs_avail, ret; + u32 dst_tag_id; u32 *epib; int i; @@ -137,9 +138,17 @@ static int emac_xsk_xmit_zc(struct prueth_emac *emac, epib[0] = 0; epib[1] = 0; cppi5_hdesc_set_pktlen(host_desc, pkt_len); - cppi5_desc_set_tags_ids(&host_desc->hdr, 0, - (emac->port_id | (q_idx << 8))); + dst_tag_id = emac->port_id | (q_idx << 8); + + if (emac->prueth->is_hsr_offload_mode && + (ndev->features & NETIF_F_HW_HSR_DUP)) + dst_tag_id = PRUETH_UNDIRECTED_PKT_DST_TAG; + + if (emac->prueth->is_hsr_offload_mode && + (ndev->features & NETIF_F_HW_HSR_TAG_INS)) + epib[1] |= PRUETH_UNDIRECTED_PKT_TAG_INS; + cppi5_desc_set_tags_ids(&host_desc->hdr, 0, dst_tag_id); k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &dma_buf); cppi5_hdesc_attach_buf(host_desc, dma_buf, pkt_len, dma_buf, pkt_len); -- 2.43.0