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Mon, 30 Dec 2024 15:45:28 -0600 From: To: , , , , , , , , CC: Alejandro Lucero Subject: [PATCH v9 25/27] cxl: add function for obtaining region range Date: Mon, 30 Dec 2024 21:44:43 +0000 Message-ID: <20241230214445.27602-26-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241230214445.27602-1-alejandro.lucero-palau@amd.com> References: <20241230214445.27602-1-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-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB74:EE_|SJ0PR12MB7473:EE_ X-MS-Office365-Filtering-Correlation-Id: a33c45da-8367-4832-9ad1-08dd291b47b4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?F0jN0mqAxOTk2FcXBIry15ZJaXveI3fiXIY5/Bv5bdYmTRnNyEklGHDIoAVM?= =?us-ascii?Q?UVV1h2P8MDAzKQNJHTUD4ABXc6wyI5NQKV7kni7256ybaMLWEvXEO29orlnT?= =?us-ascii?Q?OauTKXA19NbRJ7bwrppO5EhF1JumFe0zJeJ+jkVIGJ8MGyBDgHv/rhRboY0E?= =?us-ascii?Q?wAFoJVEZwPuPbaMoLCDHaPUZ43kXT3G1OFBZ6VLWokBcGpCnsO0oZ/wiPwf7?= =?us-ascii?Q?q2HYSRPHVmQ1KEXozKXyzUxCQ36fNkVmYxfdYHPZbe9L39m33uvPvupSsyIx?= =?us-ascii?Q?Mrzh3Lhqtt8qc3EIhujMqexfr7fmt1EcWCW4EKjFysVC2zaUYfx38xKpsB6V?= =?us-ascii?Q?AHnqsB0It56pEOTlRgVosYvsOD8Rl/kp+ft1sTtN0znGpKm8LAQinVhCJ5tb?= =?us-ascii?Q?LgWTeehYN/1jmtPCCzv3cy4DdLfJOSPjNsEDNy2vZei9GGBHywjKCBgQ32gn?= =?us-ascii?Q?fAe3Tvb8JhgmWagk9cRNhIPBwzKP8UJd5gmOPkvPrQuwJUzT7lwuRPmhBO+M?= =?us-ascii?Q?xvtGj+e1ozSPyHzgvtvfAxsKKtxUF2dgWEoD149BQxHzZr3Uti7TxMyj1d6y?= =?us-ascii?Q?PXZd5g3YmSmX8xz+9WpwM/Jq6NhXhq6H00XVFf3FKy7DFVUWxqortfWQ5LaN?= =?us-ascii?Q?aVWv8xERVRiLgxwLZrIWp/KDUdZpC8lkBrSOlE9EN7WxsV0OLgCI8+tC/nm4?= =?us-ascii?Q?w1RWtJAcISsxPbrkgknC/lWAFim6+xkP7bwhhBPuRj9PCVqMsUn0F69kIyA/?= =?us-ascii?Q?49TrqjOeESDSWZOCjL6swv+fS4IdKOHXKx7yfKZyggbYjEgQ2++GjLPbHspr?= =?us-ascii?Q?NSxj/rlICOgZuK6q5IZdHmSjB4ocBLn7FUT5unyT/i+4bifKHxxA8nCryYBb?= =?us-ascii?Q?B0CAduytgt5FfRybpB2oIyBDPfOQKXeXYSg/G03JFPyhE+ziIeyiYcV4OIv/?= =?us-ascii?Q?GA7nTW0Q1hkKA443WgFHGNh+KdfIcD2HbDgx0gk9vTatMSgjwUGGb9O9SPGS?= =?us-ascii?Q?meoW2uSwO9ZdS337NECuI+LvzyTC1d1WmbjefEfO+yR2s+lPAw8RwiC+7x0D?= =?us-ascii?Q?RZnG5pTrvEE6+WbXk+K0y3Aj7thMMAF7l5TJWqaM5U0jV4jPfg6lxGf6SAnu?= =?us-ascii?Q?kfG3gDPzmyIZae87odruKUura+oncMF55Da0fz/PcMyCYaUkLNQwf2vAPxvV?= =?us-ascii?Q?SuR53RFS5fsko1+bb2RmJ/DP94Q1BI7QSdUG2bpOb5NL7GoYh8vOtgR+pvfq?= =?us-ascii?Q?Zf01d2lZA16IwYNG5d1dLzfMMmU3PBoxYAvwUjBNscjRHrxz87ct4qQ1Y4Cq?= =?us-ascii?Q?Rxxela5L9tZQebktYRc6cMoB3RrrSM4SHO/2EDslqCUDra3kTSQ5vdLpBjCa?= =?us-ascii?Q?R5UGyZY8/HHdgJU+dhkQrY3tgQBIg/A8b5QzsbL4gp6zXqMzVFGYqMrl4irJ?= =?us-ascii?Q?ZTEB5YK+q9UftAkk5c2IHPAjt6gMCd3t7I9a6g9hpRq2jMJ8m0weCi8LlHj3?= =?us-ascii?Q?Z7tedIBgxY7Nh98=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(376014)(36860700013)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Dec 2024 21:45:29.9727 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a33c45da-8367-4832-9ad1-08dd291b47b4 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB74.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB7473 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 --- drivers/cxl/core/region.c | 15 +++++++++++++++ drivers/cxl/cxl.h | 1 + include/cxl/cxl.h | 2 ++ 3 files changed, 18 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index b3a68c1d0652..26a84f6f9fb5 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2677,6 +2677,21 @@ 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 f28873a17443..0fd65d941bd8 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -921,6 +921,7 @@ 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 19f3eef44535..053722ea3e6c 100644 --- a/include/cxl/cxl.h +++ b/include/cxl/cxl.h @@ -68,4 +68,6 @@ 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 -- 2.17.1