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Mon, 9 Dec 2024 12:55:15 -0600 From: To: , , , , , , , , , CC: Alejandro Lucero Subject: [PATCH v7 26/28] cxl: add function for obtaining region range Date: Mon, 9 Dec 2024 18:54:27 +0000 Message-ID: <20241209185429.54054-27-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241209185429.54054-1-alejandro.lucero-palau@amd.com> References: <20241209185429.54054-1-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B373:EE_|IA0PR12MB8375:EE_ X-MS-Office365-Filtering-Correlation-Id: 49ac35b0-4921-45e6-c086-08dd188305bc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|376014|1800799024|921020; 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)(82310400026)(36860700013)(376014)(1800799024)(921020);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Dec 2024 18:55:17.1891 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 49ac35b0-4921-45e6-c086-08dd188305bc 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: BN3PEPF0000B373.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8375 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 --- drivers/cxl/core/region.c | 15 +++++++++++++++ drivers/cxl/cxl.h | 1 + include/cxl/cxl.h | 1 + 3 files changed, 17 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index b39086356d74..910037546a06 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2676,6 +2676,21 @@ 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/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index cc9e3d859fa6..32d2bd0520d4 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -920,6 +920,7 @@ void cxl_coordinates_combine(struct access_coordinate *out, bool cxl_endpoint_decoder_reset_detected(struct cxl_port *port); +int cxl_get_region_range(struct cxl_region *region, struct range *range); /* * Unit test builds overrides this to __weak, find the 'strong' version * of these symbols in tools/testing/cxl/. diff --git a/include/cxl/cxl.h b/include/cxl/cxl.h index 14be26358f9c..0ed9e32f25dd 100644 --- a/include/cxl/cxl.h +++ b/include/cxl/cxl.h @@ -65,4 +65,5 @@ struct cxl_region *cxl_create_region(struct cxl_root_decoder *cxlrd, bool no_dax); int cxl_accel_region_detach(struct cxl_endpoint_decoder *cxled); +int cxl_get_region_range(struct cxl_region *region, struct range *range); #endif