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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN1PEPF0000468D.mail.protection.outlook.com (10.167.243.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7292.25 via Frontend Transport; Thu, 15 Feb 2024 19:41:13 +0000 Received: from bcheatha-HP-EliteBook-845-G8-Notebook-PC.amd.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 15.1.2507.35; Thu, 15 Feb 2024 13:41:13 -0600 From: Ben Cheatham To: , CC: , , , , , , , , Subject: [RFC PATCH 1/6] cxl/core: Add CXL Timeout & Isolation capability parsing Date: Thu, 15 Feb 2024 13:40:43 -0600 Message-ID: <20240215194048.141411-2-Benjamin.Cheatham@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240215194048.141411-1-Benjamin.Cheatham@amd.com> References: <20240215194048.141411-1-Benjamin.Cheatham@amd.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: BN1PEPF0000468D:EE_|SA0PR12MB7092:EE_ X-MS-Office365-Filtering-Correlation-Id: 62efe75b-01ec-41fc-44a2-08dc2e5e11c9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Ben Cheatham --- drivers/cxl/core/regs.c | 7 +++++++ drivers/cxl/cxl.h | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c index 372786f80955..fe0c19826a6a 100644 --- a/drivers/cxl/core/regs.c +++ b/drivers/cxl/core/regs.c @@ -92,6 +92,12 @@ void cxl_probe_component_regs(struct device *dev, void __iomem *base, length = CXL_RAS_CAPABILITY_LENGTH; rmap = &map->ras; break; + case CXL_CM_CAP_CAP_ID_TIMEOUT: + dev_dbg(dev, "found Isolation & Timeout capability (0x%x)\n", + offset); + length = CXL_TIMEOUT_CAPABILITY_LENGTH; + rmap = &map->timeout; + break; default: dev_dbg(dev, "Unknown CM cap ID: %d (0x%x)\n", cap_id, offset); @@ -211,6 +217,7 @@ int cxl_map_component_regs(const struct cxl_register_map *map, } mapinfo[] = { { &map->component_map.hdm_decoder, ®s->hdm_decoder }, { &map->component_map.ras, ®s->ras }, + { &map->component_map.timeout, ®s->timeout }, }; int i; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index b6017c0c57b4..87f3178d6642 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -36,6 +36,7 @@ #define CXL_CM_CAP_CAP_ID_RAS 0x2 #define CXL_CM_CAP_CAP_ID_HDM 0x5 +#define CXL_CM_CAP_CAP_ID_TIMEOUT 0x9 #define CXL_CM_CAP_CAP_HDM_VERSION 1 /* HDM decoders CXL 2.0 8.2.5.12 CXL HDM Decoder Capability Structure */ @@ -126,6 +127,9 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw) return 0; } +/* CXL 3.0 8.2.4.23 CXL Timeout and Isolation Capability Structure */ +#define CXL_TIMEOUT_CAPABILITY_OFFSET 0x0 +#define CXL_TIMEOUT_CAPABILITY_LENGTH 0x10 /* RAS Registers CXL 2.0 8.2.5.9 CXL RAS Capability Structure */ #define CXL_RAS_UNCORRECTABLE_STATUS_OFFSET 0x0 #define CXL_RAS_UNCORRECTABLE_STATUS_MASK (GENMASK(16, 14) | GENMASK(11, 0)) @@ -208,6 +212,7 @@ struct cxl_regs { struct_group_tagged(cxl_component_regs, component, void __iomem *hdm_decoder; void __iomem *ras; + void __iomem *timeout; ); /* * Common set of CXL Device register block base pointers @@ -242,6 +247,7 @@ struct cxl_reg_map { struct cxl_component_reg_map { struct cxl_reg_map hdm_decoder; struct cxl_reg_map ras; + struct cxl_reg_map timeout; }; struct cxl_device_reg_map {