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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.12 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.12; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.12) by SJ1PEPF00002327.mail.protection.outlook.com (10.167.242.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8158.14 via Frontend Transport; Mon, 18 Nov 2024 16:45:23 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 18 Nov 2024 10:45:20 -0600 Received: from xcbalucerop41x.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39 via Frontend Transport; Mon, 18 Nov 2024 10:45:19 -0600 From: To: , , , , , , , , CC: Alejandro Lucero Subject: [PATCH v5 26/27] cxl: add function for obtaining params from a region Date: Mon, 18 Nov 2024 16:44:33 +0000 Message-ID: <20241118164434.7551-27-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241118164434.7551-1-alejandro.lucero-palau@amd.com> References: <20241118164434.7551-1-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 Received-SPF: None (SATLEXMB04.amd.com: alejandro.lucero-palau@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002327:EE_|IA0PR12MB7507:EE_ X-MS-Office365-Filtering-Correlation-Id: 30500cb4-6d97-452e-d22e-08dd07f0658c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.12;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:atlvpn-bp.amd.com;CAT:NONE;SFS:(13230040)(376014)(1800799024)(82310400026)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Nov 2024 16:45:23.1720 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 30500cb4-6d97-452e-d22e-08dd07f0658c X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.12];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002327.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7507 From: Alejandro Lucero A CXL region struct contains the physical address to work with. Add a function for given a opaque cxl region struct returns the params to be used for mapping such memory range. Signed-off-by: Alejandro Lucero --- drivers/cxl/core/region.c | 16 ++++++++++++++++ drivers/cxl/cxl.h | 2 ++ include/cxl/cxl.h | 2 ++ 3 files changed, 20 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index eff3ad788077..fa44a60549f7 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2663,6 +2663,22 @@ static struct cxl_region *devm_cxl_add_region(struct cxl_root_decoder *cxlrd, return ERR_PTR(rc); } +int cxl_get_region_params(struct cxl_region *region, resource_size_t *start, + resource_size_t *end) +{ + if (!region) + return -ENODEV; + + if (!region->params.res) + return -ENOSPC; + + *start = region->params.res->start; + *end = region->params.res->end; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_get_region_params, 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 ee3385db5663..7b46d313e581 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -913,6 +913,8 @@ void cxl_coordinates_combine(struct access_coordinate *out, bool cxl_endpoint_decoder_reset_detected(struct cxl_port *port); +int cxl_get_region_params(struct cxl_region *region, resource_size_t *start, + resource_size_t *end); /* * 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 2a8ebabfc1dd..f14a3f292ad8 100644 --- a/include/cxl/cxl.h +++ b/include/cxl/cxl.h @@ -77,4 +77,6 @@ struct cxl_region *cxl_create_region(struct cxl_root_decoder *cxlrd, bool avoid_dax); int cxl_accel_region_detach(struct cxl_endpoint_decoder *cxled); +int cxl_get_region_params(struct cxl_region *region, resource_size_t *start, + resource_size_t *end); #endif