From patchwork Fri Apr 14 14:40:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 13211650 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79A1EC77B77 for ; Fri, 14 Apr 2023 14:40:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230396AbjDNOkf (ORCPT ); Fri, 14 Apr 2023 10:40:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229579AbjDNOkd (ORCPT ); Fri, 14 Apr 2023 10:40:33 -0400 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2089.outbound.protection.outlook.com [40.107.223.89]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A78B9BBB3; Fri, 14 Apr 2023 07:40:31 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=RdQZXJoXqzCnSelTQIAjolCQLYDxu2/m3tMJHvSO0PmyzBZlfO9pyJ6Iz10i2KtN87hdKEwNTLhBoCL+bw7dO58zIUSgFaGEvnEdPHNV6u/tgQwNDMjAxXkUQI4/aCuvGVB7oSZbSHWwQ8R8RM1sfoHCnpnCz3zY1I81Pukeplqsh1zPyQf5x+199fAa/MW9kMZbL+6d+7IiRR//bNRH3CO129x3ekT/vu5OWPyaUi+1jPK0NLvPjJj1DPYMfbGj5NSu9dAqXsc1y/enW2jo6cNE9IHc56E4pg7cFEDHfOYwfol5AYsPXGlct5pUy2Qc817yqoNQO01rcTLGC3xvfw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=B3D7jx9wsbXrF7ajqwptdEzUSmNmvay40HB00Ok1hKQ=; b=UbYMuE6EBFF29yLkQ/CWWiG5Exlvq7wr31J47xBtsmVeiPn6gSWqdhVmgiH4lgWojYgpzY4SKz2FnZ/qb5Exu2UymwHTAbetkTaGoXQ/5vbflQQ7Z+OcU1I72r1RleZwl1rcKn9rboLsZrNxjSDlfVTo3qi+s+kz0WPcF1mXamcJsOwKcsBSBsxJTEQceoWOTh3O3xNYv1YBkWoDp+OKB1QudQXjIeRIApHVcYOllYesZTlzUhCWKkENf0cMkaXYNMkQNh4Wet74WJa+oE5mYgZY5Cu5bt+UI82m16pbod1Er6NBNR5RT/fR+UTSB//0zozU0lsnunxT4vcERWrMrQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=gondor.apana.org.au smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=B3D7jx9wsbXrF7ajqwptdEzUSmNmvay40HB00Ok1hKQ=; b=v6F5OLqR5I9ao2SeY9CvI3zhkSlwMtbhxYnklRtgPNL+HwQDWa/5Qs8onILWAAx1T7XMbXoA1xoZTQU1d65K1OPfIuU+arsiePg2Kv6kb6M71784+VfHRf6jAUqs4pU5Z1GFTn0fsq6ZayMZKUahR/s81beMYILyIx5mivHhDug= Received: from BN0PR04CA0206.namprd04.prod.outlook.com (2603:10b6:408:e9::31) by IA0PR12MB8207.namprd12.prod.outlook.com (2603:10b6:208:401::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6298.30; Fri, 14 Apr 2023 14:40:29 +0000 Received: from BN8NAM11FT017.eop-nam11.prod.protection.outlook.com (2603:10b6:408:e9:cafe::fc) by BN0PR04CA0206.outlook.office365.com (2603:10b6:408:e9::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6298.36 via Frontend Transport; Fri, 14 Apr 2023 14:40:29 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; 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 BN8NAM11FT017.mail.protection.outlook.com (10.13.177.93) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6298.37 via Frontend Transport; Fri, 14 Apr 2023 14:40:28 +0000 Received: from AUS-LX-MLIMONCI.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 15.1.2375.34; Fri, 14 Apr 2023 09:40:26 -0500 From: Mario Limonciello To: Herbert Xu , Jarkko Nikula , Andy Shevchenko , Mika Westerberg , Jan Dabros CC: , Mario Limonciello , Mark Hasemeyer , "Wolfram Sang" , , Subject: [PATCH v9 2/2] i2c: designware: Add doorbell support for Mendocino Date: Fri, 14 Apr 2023 09:40:08 -0500 Message-ID: <20230414144008.836-3-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230414144008.836-1-mario.limonciello@amd.com> References: <20230414144008.836-1-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: BN8NAM11FT017:EE_|IA0PR12MB8207:EE_ X-MS-Office365-Filtering-Correlation-Id: 00cbae68-dc5e-4e74-1ad8-08db3cf630c7 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)(396003)(376002)(136003)(39860400002)(451199021)(46966006)(36840700001)(40470700004)(26005)(36860700001)(5660300002)(36756003)(7416002)(44832011)(2906002)(316002)(40480700001)(8936002)(86362001)(4326008)(8676002)(81166007)(40460700003)(41300700001)(82310400005)(82740400003)(356005)(966005)(426003)(1076003)(70206006)(336012)(47076005)(70586007)(83380400001)(2616005)(54906003)(110136005)(186003)(7696005)(478600001)(16526019)(6666004)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Apr 2023 14:40:28.0564 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 00cbae68-dc5e-4e74-1ad8-08db3cf630c7 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: BN8NAM11FT017.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8207 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Mendocino and later platform don't use the platform feature mailbox for communication for I2C arbitration, they rely upon ringing a doorbell. Detect the platform by the device ID of the root port and choose the appropriate method. Link: https://lore.kernel.org/linux-i2c/20220916131854.687371-3-jsd@semihalf.com/ Signed-off-by: Mario Limonciello Acked-by: Jarkko Nikula Reviewed-by: Mark Hasemeyer Tested-by: Mark Hasemeyer Acked-by: Wolfram Sang --- v8->v9: * Add tag drivers/i2c/busses/Kconfig | 1 + drivers/i2c/busses/i2c-designware-amdpsp.c | 26 +++++++++++++++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 89f8b75043d0..4b4323bbf268 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -568,6 +568,7 @@ config I2C_DESIGNWARE_AMDPSP bool "AMD PSP I2C semaphore support" depends on ACPI depends on CRYPTO_DEV_SP_PSP + depends on PCI depends on I2C_DESIGNWARE_PLATFORM depends on (I2C_DESIGNWARE_PLATFORM=y && CRYPTO_DEV_CCP_DD=y) || \ (I2C_DESIGNWARE_PLATFORM=m && CRYPTO_DEV_CCP_DD) diff --git a/drivers/i2c/busses/i2c-designware-amdpsp.c b/drivers/i2c/busses/i2c-designware-amdpsp.c index 12870dc44bdb..63454b06e5da 100644 --- a/drivers/i2c/busses/i2c-designware-amdpsp.c +++ b/drivers/i2c/busses/i2c-designware-amdpsp.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include +#include #include #include #include @@ -32,6 +33,8 @@ static u32 psp_i2c_access_count; static bool psp_i2c_mbox_fail; static struct device *psp_i2c_dev; +static int (*_psp_send_i2c_req)(struct psp_i2c_req *req); + /* Helper to verify status returned by PSP */ static int check_i2c_req_sts(struct psp_i2c_req *req) { @@ -72,6 +75,17 @@ static int psp_send_i2c_req_cezanne(struct psp_i2c_req *req) return ret; } +static int psp_send_i2c_req_doorbell(struct psp_i2c_req *req) +{ + int ret; + + ret = psp_ring_platform_doorbell(req->type, &req->hdr.status); + if (ret == -EIO) + return check_i2c_req_sts(req); + + return ret; +} + static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type) { struct psp_i2c_req *req; @@ -87,7 +101,7 @@ static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type) req->type = i2c_req_type; start = jiffies; - ret = read_poll_timeout(psp_send_i2c_req_cezanne, status, + ret = read_poll_timeout(_psp_send_i2c_req, status, (status != -EBUSY), PSP_I2C_REQ_RETRY_DELAY_US, PSP_I2C_REQ_RETRY_CNT * PSP_I2C_REQ_RETRY_DELAY_US, @@ -262,6 +276,8 @@ static const struct i2c_lock_operations i2c_dw_psp_lock_ops = { int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev *dev) { + struct pci_dev *rdev; + if (!IS_REACHABLE(CONFIG_CRYPTO_DEV_CCP_DD)) return -ENODEV; @@ -275,6 +291,14 @@ int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev *dev) if (psp_i2c_dev) return -EEXIST; + /* Cezanne uses platform mailbox, Mendocino and later use doorbell */ + rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); + if (rdev->device == 0x1630) + _psp_send_i2c_req = psp_send_i2c_req_cezanne; + else + _psp_send_i2c_req = psp_send_i2c_req_doorbell; + pci_dev_put(rdev); + if (psp_check_platform_access_status()) return -EPROBE_DEFER;