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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SJ5PEPF000001F1.mail.protection.outlook.com (10.167.242.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9520.1 via Frontend Transport; Wed, 14 Jan 2026 18:26:30 +0000 Received: from ethanolx7ea3host.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Wed, 14 Jan 2026 12:26:28 -0600 From: Terry Bowman To: , , , , , , , , , , , , , , , , , , CC: , , Subject: [PATCH v14 25/34] cxl/port: Map Port component registers before switchport init Date: Wed, 14 Jan 2026 12:20:46 -0600 Message-ID: <20260114182055.46029-26-terry.bowman@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260114182055.46029-1-terry.bowman@amd.com> References: <20260114182055.46029-1-terry.bowman@amd.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-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF000001F1:EE_|DS7PR12MB5768:EE_ X-MS-Office365-Filtering-Correlation-Id: 956a0c6c-9ede-40f1-e9b6-08de539a6ff5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700013|376014|7416014|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jan 2026 18:26:30.0260 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 956a0c6c-9ede-40f1-e9b6-08de539a6ff5 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001F1.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5768 Content-Type: text/plain; charset="utf-8" Port HDM registers must be mapped before calling devm_cxl_switch_port_decoders_setup(). Invoke a call to this function in cxl_port_add_dport(). Signed-off-by: Terry Bowman Reviewed-by: Dave Jiang --- drivers/cxl/core/port.c | 3 ++- drivers/cxl/cxlpci.h | 3 +++ drivers/cxl/port.c | 5 +++++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 2c4e28e7975c..3f730511f11d 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -778,7 +778,7 @@ static int cxl_setup_comp_regs(struct device *host, str= uct cxl_register_map *map return cxl_setup_regs(map); } =20 -static int cxl_port_setup_regs(struct cxl_port *port, +int cxl_port_setup_regs(struct cxl_port *port, resource_size_t component_reg_phys) { if (dev_is_platform(port->uport_dev)) @@ -786,6 +786,7 @@ static int cxl_port_setup_regs(struct cxl_port *port, return cxl_setup_comp_regs(&port->dev, &port->reg_map, component_reg_phys); } +EXPORT_SYMBOL_NS_GPL(cxl_port_setup_regs, "CXL"); =20 static int cxl_dport_setup_regs(struct device *host, struct cxl_dport *dpo= rt, resource_size_t component_reg_phys) diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h index ef4496b4e55e..532506595d0f 100644 --- a/drivers/cxl/cxlpci.h +++ b/drivers/cxl/cxlpci.h @@ -99,4 +99,7 @@ static inline void devm_cxl_port_ras_setup(struct cxl_por= t *port) } #endif =20 +int cxl_port_setup_regs(struct cxl_port *port, + resource_size_t component_reg_phys); + #endif /* __CXL_PCI_H__ */ diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c index d76b4b532064..f8a33dbf8222 100644 --- a/drivers/cxl/port.c +++ b/drivers/cxl/port.c @@ -278,6 +278,11 @@ static struct cxl_dport *cxl_port_add_dport(struct cxl= _port *port, return ERR_CAST(port_group); =20 if (port->nr_dports =3D=3D 0) { + + rc =3D cxl_port_setup_regs(port, port->component_reg_phys); + if (rc) + return ERR_PTR(rc); + rc =3D devm_cxl_switch_port_decoders_setup(port); if (rc) return ERR_PTR(rc); --=20 2.34.1