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Thu, 6 Nov 2025 03:23:48 -0600 From: Aksh Garg To: , , , , , CC: , , , , Aksh Garg Subject: [PATCH net 1/2] net: ethernet: ti: am65-cpsw-qos: fix IET verify/response timeout Date: Thu, 6 Nov 2025 14:53:04 +0530 Message-ID: <20251106092305.1437347-2-a-garg7@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251106092305.1437347-1-a-garg7@ti.com> References: <20251106092305.1437347-1-a-garg7@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE3F:EE_|BY5PR10MB4289:EE_ X-MS-Office365-Filtering-Correlation-Id: 24997e6b-56c2-48ee-38b9-08de1d1634a4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|34020700016|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?J3ua1K9XIJ+Td5miuNWkkXhEaWFJADeIGlUJrO3oJP1ZzrHbLPmeNttcaeq8?= =?us-ascii?Q?sS7aKeBiIAqHauvG+f5eag/HYvvoae2ZxP5zxTp4aVWot2c4K8qB3wXuvJid?= =?us-ascii?Q?W3cPZBd8ltWgh0sJmd33E4yaZGGdM3JzS8eYjXhGIzpqLx3Z7CGGkNyjQ8is?= =?us-ascii?Q?UMX5FdqHjnjnqrcX9Rr400Bx0X73RzwWtx1egK5OENBmKjNQM6gOWgE6u6d1?= =?us-ascii?Q?CqPv0PHx+OTGVG1G1sJr5xlFG9lpGwvlguiXtchcZp+gSlu6bbTdRYr75Ja5?= =?us-ascii?Q?f3aeWWUvFy3TiU7jkPGrDjsw0BvEaP7S6IBUEW13OfzkWkuvC2Ewnua1ocyd?= =?us-ascii?Q?OTIilCQip6lptH8VonHyL8P+GWwyP4aj+pURpeIrvwTVUpsOvfWyr+LP6czU?= =?us-ascii?Q?YjwnLH0CntX+6goNnU67WEyN9nKUFRMoczM+qU6i/Lkawpdt1iZON8rcfVwI?= =?us-ascii?Q?XPECuEBas29vDNLqzOB/E27sCn9UewaIVC5iBW170Vua2HS7WCXTzRoSD+JQ?= =?us-ascii?Q?ndyFbQybBwS0ax1S6q6D78AjtNA1epX72KMlgBWM5WPahhAWbGDIklO2JHS2?= =?us-ascii?Q?g/KJWuvYBTwvmUi3nzBCf5wPKqw4tlGGMOGYzwIlmRB+G2OcuEdT8QykiK33?= =?us-ascii?Q?0fvvyLCTQHOwHoNgwpUSOR2FTfdZlk8DGoUpykhPpPx6VQOld5F6vD7urQEG?= =?us-ascii?Q?Xd4nwNIq/9dDa6ebbGLFtqeIHdLB2OGAhPentimBDMvjRBSfWDzfl0bSHHQM?= =?us-ascii?Q?MIe+qUgS3W6hYhzsBTv35no3kl77Pxok3jD8bN7SdRqdLL5DvCl5J6RcU5D3?= =?us-ascii?Q?WkUOyQDrblKvrcSdV6EA2UmNyJzE9yd8jJ1LpywKrEXF+UyQulrADudaW1YN?= =?us-ascii?Q?N6Ol0qg8Qo4FnmP5558YN/nDNK9Kxd0PqVriGSSkUyhIucBzx+SdEEWit2io?= =?us-ascii?Q?MpDxotQf7CAiht9l/bvhS6I0Z1DCo1RPIoStrX/yr6gc8d/QUf+U2YE7o4KX?= =?us-ascii?Q?xQjVo+7I2HGDC5i67d9OR6fh/oUN4OFAkPJbCxdmhP+gKf9lOB6JmYUGZhhj?= =?us-ascii?Q?UIEI9HYeYji//dscfTSt6XvcYTQkCCi3GC5GGbBK385ZUanNcY3xsEtpl7Ge?= =?us-ascii?Q?FxNPwVT6Negkimd11qIOgIBpfQkN8DBNlTjK2FnTul1fc1gY5rEyPSceo6Hr?= =?us-ascii?Q?8VhsKDGmP81VBlAzZAu/3WOr4Fvq00Zdx53gRka16XGj+BnZDq0uf0y9ZkaW?= =?us-ascii?Q?a8OMDXOzhWYBfqssValyYCGOYuNzZAyj4zb7gSegPGoqojDMi/OxYSfsOHYB?= =?us-ascii?Q?GKtOOBTUd2xuReioj7x+83M1HH5/U/LWIFafzNnu5EIMYhJLy2w9Jq1wFvyh?= =?us-ascii?Q?7h2URzsMUCW7kiLqAp0ZspoAV1NYeBJMO9/gyC/PyqaBLqPGBJFsYha9ucPq?= =?us-ascii?Q?tGDmXtfGRGPFKF8HkFyyfMgYWOlvVDZgKjNZSgfzgfv0HxhqqXm118dQPpOf?= =?us-ascii?Q?IavM91zCYb+STV6o9ITkeApLk4fpkUSV+Rh199RDyBSnoqPTE1JE2C08R+o7?= =?us-ascii?Q?hJsu6WoH4HthcdI8btA=3D?= X-Forefront-Antispam-Report: CIP:198.47.21.194;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:flwvzet200.ext.ti.com;PTR:ErrorRetry;CAT:NONE;SFS:(13230040)(36860700013)(82310400026)(34020700016)(1800799024)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Nov 2025 09:23:54.2094 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 24997e6b-56c2-48ee-38b9-08de1d1634a4 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: CY4PEPF0000EE3F.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB4289 Content-Type: text/plain; charset="utf-8" The CPSW module uses the MAC_VERIFY_CNT bit field in the CPSW_PN_IET_VERIFY_REG_k register to set the verify/response timeout count. This register specifies the number of clock cycles to wait before resending a verify packet if the verification fails. The verify/response timeout count, as being set by the function am65_cpsw_iet_set_verify_timeout_count() is hardcoded for 125MHz clock frequency, which varies based on PHY mode and link speed. The respective clock frequencies are as follows: - RGMII mode: * 1000 Mbps: 125 MHz * 100 Mbps: 25 MHz * 10 Mbps: 2.5 MHz - QSGMII/SGMII mode: 125 MHz (all speeds) Fix this by adding logic to calculate the correct timeout counts based on the actual PHY interface mode and link speed. Fixes: 49a2eb9068246 ("net: ethernet: ti: am65-cpsw-qos: Add Frame Preempti= on MAC Merge support") Signed-off-by: Aksh Garg --- drivers/net/ethernet/ti/am65-cpsw-qos.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ti/am65-cpsw-qos.c b/drivers/net/ethernet= /ti/am65-cpsw-qos.c index fa96db7c1a13..ff68a56796a7 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-qos.c +++ b/drivers/net/ethernet/ti/am65-cpsw-qos.c @@ -276,9 +276,31 @@ static int am65_cpsw_iet_set_verify_timeout_count(stru= ct am65_cpsw_port *port) /* The number of wireside clocks contained in the verify * timeout counter. The default is 0x1312d0 * (10ms at 125Mhz in 1G mode). + * The frequency of the clock depends on the link speed + * and the PHY interface. */ - val =3D 125 * HZ_PER_MHZ; /* assuming 125MHz wireside clock */ + switch (port->slave.phy_if) { + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + if (port->qos.link_speed =3D=3D SPEED_1000) + val =3D 125 * HZ_PER_MHZ; /* 125 MHz at 1000Mbps*/ + else if (port->qos.link_speed =3D=3D SPEED_100) + val =3D 25 * HZ_PER_MHZ; /* 25 MHz at 100Mbps*/ + else + val =3D (25 * HZ_PER_MHZ) / 10; /* 2.5 MHz at 10Mbps*/ + break; + + case PHY_INTERFACE_MODE_QSGMII: + case PHY_INTERFACE_MODE_SGMII: + val =3D 125 * HZ_PER_MHZ; /* 125 MHz */ + break; =20 + default: + netdev_err(port->ndev, "selected mode does not supported IET\n"); + return -EOPNOTSUPP; + } val /=3D MILLIHZ_PER_HZ; /* count per ms timeout */ val *=3D verify_time_ms; /* count for timeout ms */ =20 --=20 2.34.1