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Miller" , Subject: [PATCH v8 3/6] crypto: ccp: Return doorbell status code as an argument Date: Mon, 3 Apr 2023 13:32:12 -0500 Message-ID: <20230403183216.3493-4-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230403183216.3493-1-mario.limonciello@amd.com> References: <20230403183216.3493-1-mario.limonciello@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF000108EB:EE_|SJ2PR12MB8928:EE_ X-MS-Office365-Filtering-Correlation-Id: d560c404-ac4c-461b-a680-08db3471fda8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 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:(13230028)(4636009)(346002)(376002)(136003)(396003)(39860400002)(451199021)(36840700001)(40470700004)(46966006)(356005)(5660300002)(81166007)(44832011)(2616005)(82310400005)(47076005)(83380400001)(336012)(110136005)(426003)(54906003)(6636002)(316002)(7696005)(40480700001)(16526019)(186003)(478600001)(6666004)(86362001)(1076003)(26005)(36756003)(82740400003)(40460700003)(36860700001)(4326008)(41300700001)(8676002)(8936002)(70206006)(70586007)(2906002)(36900700001)(134885004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2023 18:32:50.7810 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d560c404-ac4c-461b-a680-08db3471fda8 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: BL02EPF000108EB.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8928 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org If the doorbell failed to ring we return -EIO, but the caller can't determine why it failed. Pass the reason for the failure in an argument for caller to investigate. Suggested-by: Mark Hasemeyer Signed-off-by: Mario Limonciello Reviewed-by: Mark Hasemeyer Tested-by: Mark Hasemeyer --- drivers/crypto/ccp/platform-access.c | 4 +++- include/linux/psp-platform-access.h | 4 ++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/ccp/platform-access.c b/drivers/crypto/ccp/platform-access.c index 1cc154a1c6ab..48f59ae91692 100644 --- a/drivers/crypto/ccp/platform-access.c +++ b/drivers/crypto/ccp/platform-access.c @@ -132,7 +132,7 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg msg, } EXPORT_SYMBOL_GPL(psp_send_platform_access_msg); -int psp_ring_platform_doorbell(int msg) +int psp_ring_platform_doorbell(int msg, u32 *result) { struct psp_device *psp = psp_get_master_device(); struct psp_platform_access_device *pa_dev; @@ -164,6 +164,8 @@ int psp_ring_platform_doorbell(int msg) val = FIELD_GET(PSP_CMDRESP_STS, ioread32(cmd)); if (val) { + if (result) + *result = val; ret = -EIO; goto unlock; } diff --git a/include/linux/psp-platform-access.h b/include/linux/psp-platform-access.h index 89df4549fada..1b661341d8f3 100644 --- a/include/linux/psp-platform-access.h +++ b/include/linux/psp-platform-access.h @@ -45,9 +45,9 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_reques * -%EBUSY: mailbox in recovery or in use * -%ENODEV: driver not bound with PSP device * -%ETIMEDOUT: request timed out - * -%EIO: unknown error (see kernel log) + * -%EIO: error will be stored in result argument */ -int psp_ring_platform_doorbell(int msg); +int psp_ring_platform_doorbell(int msg, u32 *result); /** * psp_check_platform_access_status() - Checks whether platform features is ready