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Mon, 14 Apr 2025 10:14:17 -0500 From: To: , , , , , , , , CC: Alejandro Lucero , Zhi Wang , "Jonathan Cameron" Subject: [PATCH v13 21/22] cxl: add function for obtaining region range Date: Mon, 14 Apr 2025 16:13:35 +0100 Message-ID: <20250414151336.3852990-22-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250414151336.3852990-1-alejandro.lucero-palau@amd.com> References: <20250414151336.3852990-1-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A101:EE_|DM4PR12MB6664:EE_ X-MS-Office365-Filtering-Correlation-Id: e1826e6e-7824-48de-e0db-08dd7b67076c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Apr 2025 15:14:19.2589 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e1826e6e-7824-48de-e0db-08dd7b67076c 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A101.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6664 From: Alejandro Lucero A CXL region struct contains the physical address to work with. Add a function for getting the cxl region range to be used for mapping such memory range. Signed-off-by: Alejandro Lucero Reviewed-by: Zhi Wang Reviewed-by: Jonathan Cameron Reviewed-by: Dave Jiang --- drivers/cxl/core/region.c | 15 +++++++++++++++ include/cxl/cxl.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index cec168a26efb..253ec4e384a6 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2717,6 +2717,21 @@ static struct cxl_region *devm_cxl_add_region(struct cxl_root_decoder *cxlrd, return ERR_PTR(rc); } +int cxl_get_region_range(struct cxl_region *region, struct range *range) +{ + if (WARN_ON_ONCE(!region)) + return -ENODEV; + + if (!region->params.res) + return -ENOSPC; + + range->start = region->params.res->start; + range->end = region->params.res->end; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_get_region_range, "CXL"); + static ssize_t __create_region_show(struct cxl_root_decoder *cxlrd, char *buf) { return sysfs_emit(buf, "region%u\n", atomic_read(&cxlrd->region_id)); diff --git a/include/cxl/cxl.h b/include/cxl/cxl.h index 0a5d97d5a6bb..0395846cde27 100644 --- a/include/cxl/cxl.h +++ b/include/cxl/cxl.h @@ -271,4 +271,6 @@ struct cxl_region *cxl_create_region(struct cxl_root_decoder *cxlrd, bool no_dax); int cxl_accel_region_detach(struct cxl_endpoint_decoder *cxled); +struct range; +int cxl_get_region_range(struct cxl_region *region, struct range *range); #endif /* __CXL_CXL_H__ */