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Miller" , Subject: [PATCH v8 1/6] crypto: ccp: Drop extra doorbell checks Date: Mon, 3 Apr 2023 13:32:10 -0500 Message-ID: <20230403183216.3493-2-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: BL02EPF000108E9:EE_|IA0PR12MB8838:EE_ X-MS-Office365-Filtering-Correlation-Id: ac15c867-b862-4a5d-9c08-08db3471cf4b 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)(39860400002)(136003)(346002)(396003)(376002)(451199021)(40470700004)(46966006)(36840700001)(2906002)(44832011)(81166007)(356005)(5660300002)(82740400003)(70206006)(8936002)(70586007)(41300700001)(36860700001)(4326008)(8676002)(36756003)(1076003)(40460700003)(110136005)(54906003)(316002)(47076005)(2616005)(6636002)(83380400001)(82310400005)(336012)(426003)(86362001)(16526019)(478600001)(186003)(26005)(6666004)(40480700001)(7696005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2023 18:32:41.6375 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ac15c867-b862-4a5d-9c08-08db3471cf4b 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: BL02EPF000108E9.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8838 X-Spam-Status: No, score=0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1762181342481126017?= X-GMAIL-MSGID: =?utf-8?q?1762181342481126017?= The doorbell register set used for I2C arbitration is dedicated for this purpose and there is no need to utilize other safety checks the platform access register set uses. Suggested-by: Mark Hasemeyer Signed-off-by: Mario Limonciello Reviewed-by: Mark Hasemeyer Tested-by: Mark Hasemeyer --- drivers/crypto/ccp/platform-access.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/drivers/crypto/ccp/platform-access.c b/drivers/crypto/ccp/platform-access.c index b51fb1196932..1ad3a0a512b1 100644 --- a/drivers/crypto/ccp/platform-access.c +++ b/drivers/crypto/ccp/platform-access.c @@ -20,14 +20,6 @@ #define PSP_CMD_TIMEOUT_US (500 * USEC_PER_MSEC) -/* Doorbell shouldn't be ringing */ -static int check_doorbell(u32 __iomem *doorbell) -{ - u32 tmp; - - return readl_poll_timeout(doorbell, tmp, tmp != 0, 0, PSP_CMD_TIMEOUT_US); -} - /* Recovery field should be equal 0 to start sending commands */ static int check_recovery(u32 __iomem *cmd) { @@ -156,18 +148,6 @@ int psp_ring_platform_doorbell(int msg) mutex_lock(&pa_dev->doorbell_mutex); - if (check_doorbell(button)) { - dev_dbg(psp->dev, "doorbell is not ready\n"); - ret = -EBUSY; - goto unlock; - } - - if (check_recovery(cmd)) { - dev_dbg(psp->dev, "doorbell command in recovery\n"); - ret = -EBUSY; - goto unlock; - } - if (wait_cmd(cmd)) { dev_dbg(psp->dev, "doorbell command not done processing\n"); ret = -EBUSY;