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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 BN2PEPF0000449D.mail.protection.outlook.com (10.167.243.148) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7409.10 via Frontend Transport; Tue, 26 Mar 2024 21:27:03 +0000 Received: from jallen-jump-host.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; Tue, 26 Mar 2024 16:27:02 -0500 From: John Allen To: , , , CC: , , , John Allen Subject: [PATCH 1/2] ACPI: PRM: Add PRM handler direct call support Date: Tue, 26 Mar 2024 21:26:39 +0000 Message-ID: <20240326212640.96920-2-john.allen@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240326212640.96920-1-john.allen@amd.com> References: <20240326212640.96920-1-john.allen@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@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: BN2PEPF0000449D:EE_|IA1PR12MB6017:EE_ X-MS-Office365-Filtering-Correlation-Id: cc1e35a0-40c3-4fbe-e8bb-08dc4ddb7b0c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Mar 2024 21:27:03.6137 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cc1e35a0-40c3-4fbe-e8bb-08dc4ddb7b0c 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: BN2PEPF0000449D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6017 Platform Runtime Mechanism (PRM) handlers can be invoked from either the AML interpreter or directly by an OS driver. Implement the direct call method. Export the symbol as this will be used by modules such as the AMD Address Translation Library and likely others in the future. Signed-off-by: John Allen Reviewed-by: Yazen Ghannam --- drivers/acpi/prmt.c | 24 ++++++++++++++++++++++++ include/linux/prmt.h | 5 +++++ 2 files changed, 29 insertions(+) diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c index c78453c74ef5..9e548426cc22 100644 --- a/drivers/acpi/prmt.c +++ b/drivers/acpi/prmt.c @@ -214,6 +214,30 @@ static struct prm_handler_info *find_prm_handler(const guid_t *guid) #define UPDATE_LOCK_ALREADY_HELD 4 #define UPDATE_UNLOCK_WITHOUT_LOCK 5 +int acpi_call_prm_handler(guid_t handler_guid, void *param_buffer) +{ + struct prm_handler_info *handler = find_prm_handler(&handler_guid); + struct prm_module_info *module = find_prm_module(&handler_guid); + struct prm_context_buffer context; + efi_status_t status; + + if (!module || !handler) + return -ENODEV; + + memset(&context, 0, sizeof(context)); + ACPI_COPY_NAMESEG(context.signature, "PRMC"); + context.identifier = handler->guid; + context.static_data_buffer = handler->static_data_buffer_addr; + context.mmio_ranges = module->mmio_info; + + status = efi_call_acpi_prm_handler(handler->handler_addr, + (u64)param_buffer, + &context); + + return efi_status_to_err(status); +} +EXPORT_SYMBOL_GPL(acpi_call_prm_handler); + /* * This is the PlatformRtMechanism opregion space handler. * @function: indicates the read/write. In fact as the PlatformRtMechanism diff --git a/include/linux/prmt.h b/include/linux/prmt.h index 24da8364b919..9c094294403f 100644 --- a/include/linux/prmt.h +++ b/include/linux/prmt.h @@ -2,6 +2,11 @@ #ifdef CONFIG_ACPI_PRMT void init_prmt(void); +int acpi_call_prm_handler(guid_t handler_guid, void *param_buffer); #else static inline void init_prmt(void) { } +static inline int acpi_call_prm_handler(guid_t handler_guid, void *param_buffer) +{ + return -EOPNOTSUPP; +} #endif