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De Francesco" , Terry Bowman , Robert Richter Subject: [PATCH v5 11/14] cxl/region: Add function to find a port's switch decoder by range Date: Mon, 28 Apr 2025 23:43:14 +0200 Message-ID: <20250428214318.1682212-12-rrichter@amd.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250428214318.1682212-1-rrichter@amd.com> References: <20250428214318.1682212-1-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000989EC:EE_|IA1PR12MB7759:EE_ X-MS-Office365-Filtering-Correlation-Id: 33bc4dca-fa9c-452c-38a4-08dd869dd80c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|36860700013|7416014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Jw3fCDSi9+93yZuG4fdoVo0I5Bk2TwXEKlAIz1RSanEPo15eTK1lTBTSY7DO?= =?us-ascii?Q?sBqAxaePlKKFL1gqdfK8v+mU8MwavXF0VMAnu/cr3L1AujwU1sgiwSf/c+P+?= =?us-ascii?Q?JUDkHx68b/zsRyEd2cDO+bcgINRx77nE1lefxV6O6MmrZb7q/dmldUVEcYT0?= =?us-ascii?Q?Rpl2ja4YAzb5R4oqClcGCVjyk/immyFABN8xq0DESk7LLn2yd5rxsBwDrliT?= =?us-ascii?Q?jmtoho4LUnSJ2jzGlDCpU+oRO2iJc3SZVPShYBdKoqCOOZn8RiAVKFKbicUj?= =?us-ascii?Q?Ot3LUbZPhq3ry4cYc2WLkKNy4S4YJZUL7AWWyK5CH1Maskj30iO401FEOysO?= =?us-ascii?Q?/S5nvm0Clop0a47Z+s6XRAqLv33aTJ/4t7X2zjMJsqOt0dPQy3E19mv6Xnt1?= =?us-ascii?Q?MDDAgTDljDYpW5CJtlkH+XMDtvtXYO6R4w4MuRWvckpFoANFAOQq+o8UTG0h?= =?us-ascii?Q?+NTbiVfYbEu9wNObEQVwugOYAzl8NpJGfonN5GOctW9M9QIfSfYJfoL38iWx?= =?us-ascii?Q?mKFANBJKqsz0ipd3IORotxwPXdGZU3khZ9Jdm1E7oBc5pehP0XszOP7DzHqq?= =?us-ascii?Q?CTuZXLlO8rguj17AYI1RlT9w1ATvjkENdFKhXwpSq9+T7YmCf34NBPntiySb?= =?us-ascii?Q?CxmtZcZ6wwC1pAhFtCPhzkHxMHypfXuXX00xWBKEvdUQamdtgVH0AoFGKJXh?= =?us-ascii?Q?iiZR3OdwgawMvtCqWhuMdnjckXnXsxGfk0T6YOWz240d20g9Om6gGNrIXheB?= =?us-ascii?Q?Zl2g/CSJAzeeDjvsV9WZ2BJylECFumQOKKYqEEax8wmslygbyBBdDRzdnIau?= =?us-ascii?Q?2m8sGzdtG2455Je/CcFKIXni3qTel87tTdB7iTydEmTTx7qvEcBjmt2nP8ME?= =?us-ascii?Q?aELVpCpQDV/+UycrmwM5vLA1dTLucb9NsNSointAT1W7fEb7RcQf8qzCy8qH?= =?us-ascii?Q?lA13wg2bOD76/7gXhF5yZGVo/2HJdOJ4DD59yzspBVP/wi2kZC+glQRSTiOe?= =?us-ascii?Q?Wc2FrL6bSMnwFIyWdt8BoemAHk4Umvrg0sbLAaSEkYcUSyf0Rucw/tM1RFNi?= =?us-ascii?Q?zShxfCXp9RRK5a3RsxmxMyQb99rq5zkNVgJuKGB3wHJTCfjIYqVzZK3FfnMb?= =?us-ascii?Q?J/VW9g6D3JkbHBJGw3Qm9s8CrgbDWc2eWmbPxs8WXzxFVEhD/tjvD8NEMUDj?= =?us-ascii?Q?d4ywt+VUCKRU3Ros4Uyj1bfUeXu8mVWJgDRUFVVziToeYbOY7We6lv5dDrpJ?= =?us-ascii?Q?0PQxrU605Y7MfIQ6KOAY9VXnKz06OhHd/Wri/ZgyfTzof1lNaJ4BOSnLxwjj?= =?us-ascii?Q?ftK7c7wz64GymC8/+sxFYZCWlISjiEtLHhoKIDwI7Co5y1POFxVUMmUbzZLZ?= =?us-ascii?Q?ZNz+gnx41rrzYLEjxsBSeBDjQK4ecUhi23/8b9k9UIH3GJldyQjl+vZ0l962?= =?us-ascii?Q?BvELjDRIWyTdykVUFhbRMZZuvc+mKVNjHdmrZEuRPtjfey0DeJMr/xiMTgGR?= =?us-ascii?Q?O2yANyQHJXfMNpmiTNNVME06VrWcGuSFl9sj?= 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)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2025 21:44:24.7612 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 33bc4dca-fa9c-452c-38a4-08dd869dd80c 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: MWH0EPF000989EC.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7759 Content-Type: text/plain; charset="utf-8" Factor out code to find the switch decoder of a port for a specific address range. Reuse the code to search a root decoder, create the function cxl_port_find_switch_decoder() and rework match_root_decoder_by_range() to be usable for switch decoders too. Signed-off-by: Robert Richter Reviewed-by: Gregory Price Reviewed-by: Jonathan Cameron Reviewed-by: Dave Jiang Tested-by: Gregory Price Reviewed-by: Fabio M. De Francesco --- drivers/cxl/core/region.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index a292d5c4c4a9..ef5408301714 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -3205,33 +3205,39 @@ static int devm_cxl_add_dax_region(struct cxl_regio= n *cxlr) return rc; } =20 -static int match_root_decoder_by_range(struct device *dev, - const void *data) +static int match_decoder_by_range(struct device *dev, const void *data) { const struct range *r1, *r2 =3D data; - struct cxl_root_decoder *cxlrd; + struct cxl_decoder *cxld; =20 - if (!is_root_decoder(dev)) + if (!is_switch_decoder(dev)) return 0; =20 - cxlrd =3D to_cxl_root_decoder(dev); - r1 =3D &cxlrd->cxlsd.cxld.hpa_range; + cxld =3D to_cxl_decoder(dev); + r1 =3D &cxld->hpa_range; return range_contains(r1, r2); } =20 +static struct cxl_decoder * +cxl_port_find_switch_decoder(struct cxl_port *port, struct range *hpa) +{ + struct device *cxld_dev =3D device_find_child(&port->dev, hpa, + match_decoder_by_range); + + return cxld_dev ? to_cxl_decoder(cxld_dev) : NULL; +} + static struct cxl_root_decoder * cxl_find_root_decoder(struct cxl_endpoint_decoder *cxled) { struct cxl_memdev *cxlmd =3D cxled_to_memdev(cxled); struct cxl_port *port =3D cxled_to_port(cxled); struct cxl_root *cxl_root __free(put_cxl_root) =3D find_cxl_root(port); - struct cxl_decoder *cxld =3D &cxled->cxld; + struct cxl_decoder *root, *cxld =3D &cxled->cxld; struct range *hpa =3D &cxld->hpa_range; - struct device *cxlrd_dev; =20 - cxlrd_dev =3D device_find_child(&cxl_root->port.dev, hpa, - match_root_decoder_by_range); - if (!cxlrd_dev) { + root =3D cxl_port_find_switch_decoder(&cxl_root->port, hpa); + if (!root) { dev_err(cxlmd->dev.parent, "%s:%s no CXL window for range %#llx:%#llx\n", dev_name(&cxlmd->dev), dev_name(&cxld->dev), @@ -3239,7 +3245,7 @@ cxl_find_root_decoder(struct cxl_endpoint_decoder *cx= led) return NULL; } =20 - return to_cxl_root_decoder(cxlrd_dev); + return to_cxl_root_decoder(&root->dev); } =20 static int match_region_by_range(struct device *dev, const void *data) --=20 2.39.5