From nobody Mon Feb 9 01:16:46 2026 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 BB99BC6FD1C for ; Wed, 22 Mar 2023 21:05:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230004AbjCVVFk (ORCPT ); Wed, 22 Mar 2023 17:05:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229480AbjCVVFc (ORCPT ); Wed, 22 Mar 2023 17:05:32 -0400 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (mail-bn8nam12on2068.outbound.protection.outlook.com [40.107.237.68]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F137B11EB9; Wed, 22 Mar 2023 14:05:30 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=iEl77jpAHOnkFcp1sStoZ01uWCYSopGM23YIQV11Lr2TcGxv2cnaiyY65Dbx63j/D7+Uy1cV+V8wmDlex4AflQoQVDVVYtjPmC2uHgvkmmMLicPEU3Sg4QaOJ4eE9vcwwO74gKgE1EJQ+14VKf3a/g8JYoSBTqOYxPMYMh0j2J5mPVwxKmNqHsYW3+KyGnz+wH03qaopJH5Q+aW9B8LRNXp6gI8tUOcQP0L3gs7MXri01Eip5TonMgdIDleW1BMrJGXW18kUj9sAW/94UpLsV0E6q/icvWVItmysJLUAz4PW6dTbWQc3jfuF7FQ88MUsRiX972qX5l8fbb0HSN6c8Q== 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=gODEmt89Z8dHVcHdT+1aUJVpWvl7CCoeG8E+4vlXKVo=; b=UR63A9LBxatr3Tn4qKxivTjd8+Q/kK61jT5M9EeBcvzws/OXIc/zoV/AbmZ9ClS3g8pPbZKnoTEDqZh6PAwK6G7O/P4s2o85TblbmIOojENg3l0I4TmL2/PgUUZVzXR8+cSMbKIo/bkJ4G2YGCf0cvjkF0qsmeInjzkEWxjhgQ5m1w6nCUZhYchA/p9Nr8EFoo2aeMnuiVDXdpAZLMkUpX2qxWjFJFJzrC1ada5GmYi5czJDxDXsA7tGo+KgQkWXGpmFQCkZ4GskR7GuQ+vl9dbLilV5Hk9LHp2+etUBFLYPFyEQtlOztg2IFqWPHu8vmqGgkVHGh6vsSEDiS3rXMA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=semihalf.com 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=gODEmt89Z8dHVcHdT+1aUJVpWvl7CCoeG8E+4vlXKVo=; b=W/gw3gCuknjdH9GI724LxsdCimxmHwSWJXMQNSpwLl6fWcNDODgZvaEPIiXuo3uM6ir2KDOFtExKX9hSZIFSAhuKUmjw7eN5xpZocWRoFCp+EJfUvqoKDdhWpAXKXhHquxNvpsBfFilxFyh67McdlZ7oB4rPWRGVY7d89FYEBiA= Received: from DS7PR03CA0048.namprd03.prod.outlook.com (2603:10b6:5:3b5::23) by SN7PR12MB7321.namprd12.prod.outlook.com (2603:10b6:806:298::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.37; Wed, 22 Mar 2023 21:05:28 +0000 Received: from DM6NAM11FT086.eop-nam11.prod.protection.outlook.com (2603:10b6:5:3b5:cafe::77) by DS7PR03CA0048.outlook.office365.com (2603:10b6:5:3b5::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.37 via Frontend Transport; Wed, 22 Mar 2023 21:05:28 +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 DM6NAM11FT086.mail.protection.outlook.com (10.13.173.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6222.17 via Frontend Transport; Wed, 22 Mar 2023 21:05:28 +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; Wed, 22 Mar 2023 16:05:26 -0500 From: Mario Limonciello To: =?UTF-8?q?Jan=20D=C4=85bro=C5=9B?= , Grzegorz Bernacki , Mark Hasemeyer , Jarkko Nikula , Andy Shevchenko , Mika Westerberg CC: Mario Limonciello , , Subject: [PATCH v6 4/4] i2c: designware: Add doorbell support for Mendocino Date: Wed, 22 Mar 2023 16:02:26 -0500 Message-ID: <20230322210227.464-5-mario.limonciello@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230322210227.464-1-mario.limonciello@amd.com> References: <20230322210227.464-1-mario.limonciello@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: DM6NAM11FT086:EE_|SN7PR12MB7321:EE_ X-MS-Office365-Filtering-Correlation-Id: 47e31157-3af8-4422-4992-08db2b192a1d 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:(13230025)(4636009)(136003)(396003)(39860400002)(376002)(346002)(451199018)(36840700001)(40470700004)(46966006)(81166007)(2906002)(86362001)(83380400001)(36860700001)(40480700001)(8936002)(5660300002)(336012)(82310400005)(356005)(2616005)(186003)(41300700001)(40460700003)(16526019)(1076003)(26005)(478600001)(54906003)(47076005)(7696005)(110136005)(316002)(36756003)(426003)(44832011)(966005)(70586007)(4326008)(8676002)(70206006)(82740400003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Mar 2023 21:05:28.3015 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 47e31157-3af8-4422-4992-08db2b192a1d 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: DM6NAM11FT086.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7321 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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@semihal= f.com/ Signed-off-by: Mario Limonciello --- v5->v6: * Handle Mendocino busy code like Cezanne v4->v5: * Poll for busy * Rename to mendocino * Add explicit dependency on PCI v3->v4: * Adjust to use PCI device ID and function pointers instead v2->v3: * Use CPU ID rather than ACPI ID, this will be pushed to a later patch v1->v2: * New patch --- drivers/i2c/busses/Kconfig | 1 + drivers/i2c/busses/i2c-designware-amdpsp.c | 25 +++++++++++++++++++++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index d53bf716f97d..2aba5ffa8b03 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 I2C_DESIGNWARE_PLATFORM + depends on PCI imply CRYPTO_DEV_SP_PSP help This driver enables managed host access to the selected I2C bus shared diff --git a/drivers/i2c/busses/i2c-designware-amdpsp.c b/drivers/i2c/busse= s/i2c-designware-amdpsp.c index 12870dc44bdb..f5c754919fbd 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 =20 #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; =20 +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; } =20 +static int psp_send_i2c_req_mendocino(struct psp_i2c_req *req) +{ + int ret; + + ret =3D psp_ring_platform_doorbell(req->type, &req->hdr.status); + if (ret =3D=3D -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_re= q_type) req->type =3D i2c_req_type; =20 start =3D jiffies; - ret =3D read_poll_timeout(psp_send_i2c_req_cezanne, status, + ret =3D read_poll_timeout(_psp_send_i2c_req, status, (status !=3D -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 =3D { =20 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; =20 @@ -275,6 +291,13 @@ int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev= *dev) if (psp_i2c_dev) return -EEXIST; =20 + /* Cezanne uses platform mailbox, Mendocino and later use doorbell */ + rdev =3D pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); + if (rdev->device =3D=3D 0x1630) + _psp_send_i2c_req =3D psp_send_i2c_req_cezanne; + else + _psp_send_i2c_req =3D psp_send_i2c_req_mendocino; + if (psp_check_platform_access_status()) return -EPROBE_DEFER; =20 --=20 2.34.1