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Mon, 30 Mar 2026 09:38:48 -0500 From: To: , , , , , , , , CC: Alejandro Lucero , Edward Cree Subject: [PATCH v25 09/11] sfc: obtain decoder and region if committed by firmware Date: Mon, 30 Mar 2026 15:38:25 +0100 Message-ID: <20260330143827.1278677-10-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260330143827.1278677-1-alejandro.lucero-palau@amd.com> References: <20260330143827.1278677-1-alejandro.lucero-palau@amd.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-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000A672F:EE_|SJ1PR12MB6266:EE_ X-MS-Office365-Filtering-Correlation-Id: 90cc748c-2f2b-48bc-a491-08de8e6a10c7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|376014|1800799024|82310400026|56012099003|18002099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: r7Rfl0gtHehI757u6SyVfFTFoZYl8A4TL8wGPio4fnypJUIZmBljI0eV+hZ0pXQdhpQm2b9ME6jNBB6nJTr1bdHS10SzUzoQx0a7psLi8Tne05X1rL05UD0xpjLRY7UmKRB9p1pxcbmk10ZAYyE3b6RoDIXA6CzSouFBdlZldw+c9MLO5GRC58dadPTu/VgurwcV2pyl8vAXjo3+Q00I7vllHLgxdP453QjSm9ExWMLCDhd3YA7SILTlw5CqkI5IXggmwLEyyE2/8kWHeoXECCr65dUUWowsGSRr7wfFbeHc+4yMYFBwopQuqftA8IpI5QqNhLgSd6kX76BdfOe1/8T7wBkghr0Dc3BkukITmX7Mp4DuLip0uNyIHRugmhWC0lhe968qLGiWlplATtniJ2kaa+djp7Se+qazQgcDLf+gCHxbYOJIaUo2JdjMQNHp X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Mar 2026 14:38:53.1580 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 90cc748c-2f2b-48bc-a491-08de8e6a10c7 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000A672F.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6266 From: Alejandro Lucero Check if device HDM is already committed during firmware/BIOS initialization. A CXL region should exist if so after memdev allocation/initialization. Get HPA from region and map it. Signed-off-by: Alejandro Lucero Acked-by: Edward Cree --- drivers/net/ethernet/sfc/efx_cxl.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c index 63e6f277ae9f..f3bcae22d1dd 100644 --- a/drivers/net/ethernet/sfc/efx_cxl.c +++ b/drivers/net/ethernet/sfc/efx_cxl.c @@ -19,6 +19,7 @@ int efx_cxl_init(struct efx_probe_data *probe_data) struct efx_nic *efx = &probe_data->efx; struct pci_dev *pci_dev = efx->pci_dev; struct efx_cxl *cxl; + struct range range; u16 dvsec; int rc; @@ -81,6 +82,24 @@ int efx_cxl_init(struct efx_probe_data *probe_data) return PTR_ERR(cxl->cxlmd); } + cxl->efx_region = cxl_get_region_from_committed_decoder(cxl->cxlmd); + if (!cxl->efx_region) + return -ENODEV; + + rc = cxl_get_region_range(cxl->efx_region, &range); + if (rc) { + pci_err(pci_dev, + "CXL getting regions params from a committed decoder failed"); + return rc; + } + + cxl->ctpio_cxl = ioremap(range.start, range_len(&range)); + if (!cxl->ctpio_cxl) { + pci_err(pci_dev, "CXL ioremap region (%pra) failed", &range); + return -ENOMEM; + } + + probe_data->cxl = cxl; return 0; @@ -88,6 +107,17 @@ int efx_cxl_init(struct efx_probe_data *probe_data) void efx_cxl_exit(struct efx_probe_data *probe_data) { + if (!probe_data->cxl) + return; + + iounmap(probe_data->cxl->ctpio_cxl); + + /* If the sfc cxl initialization was successful, it implies the + * endpoint decoder had an auto discover region which is the one + * we used and we need to remove now. Otherwise the region will + * be around until the root port is removed. + */ + cxl_unregister_region(probe_data->cxl->efx_region); } MODULE_IMPORT_NS("CXL"); -- 2.34.1