From patchwork Wed Feb 9 17:27:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Terry Bowman X-Patchwork-Id: 541283 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 31DF6C433F5 for ; Wed, 9 Feb 2022 17:27:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238207AbiBIR1n (ORCPT ); Wed, 9 Feb 2022 12:27:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238226AbiBIR1l (ORCPT ); Wed, 9 Feb 2022 12:27:41 -0500 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2045.outbound.protection.outlook.com [40.107.93.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1A1EC05CB9B; Wed, 9 Feb 2022 09:27:38 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=I+hXSeBeZXH0GrY0ZBzxrFLeI4Sjy/59/CbtQZY8ck8WJKlz0aaZqnDLmsk7AkoIk+3Ja4OgW5zmzFH97gUlPh2tspl+2CucsQT2N1AgzoaS4isioZwDnDTEKKq/5PK4VYDy6dG5tdcuHoLuUcevq0huTMzmS0XGt8htL4sMsFv+7LUlTec7AGIUkLaqa8vG2Z3ryyneF0b5efNaud7c9NoqK71phfP+miU9DJT6tk6adhpow0cPYWkqD59mfxv5BkD3Vv02vZL6zCpePc5XoN+D1ByimtC+KAAPzdG+/Eo70X3G+oBmIdFj0bwRbDvfeBGRVu76Sq5Wk4zSYIDqOQ== 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=IjxTVIUrUTpIybxsqz0tWcARZDasG3wYPZNCf5YznE4=; b=j79i1ZJzTjm1k3cjABi3MYWUyF7myClwat7IwrhUNadbLLFArTCWDG85eloQIlIT7uAsO27khZLc/aq/5WKaPvuywPh8s6XwyG+y2QfsUbugop8wa6nKLYos+kH8PToijvc49QMp0ob1xUcSZd+qkIV700XlFuh0ihBmXw4TmVK0S3gZSvDG7XrNFu8yCpZ+bnGtuluB3R6yLPAIIm6L5xl6UkIdulPMBtXsSdgU/j9OD/J8fxsmFGupAXK2NHWg07Nx/V+pd0Dr+FjB+naqp9JiPgJdfMh7Wpehp1Tt642iewMyOpCGVO0LevhVRZs1eQPpmCZ6SpBnCApOwSUC2A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=roeck-us.net 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=IjxTVIUrUTpIybxsqz0tWcARZDasG3wYPZNCf5YznE4=; b=ABXfcfkwMbM/KVGRINXdzjd3Rt5H443pqohypCiHM+Q/TbzLUUBl4OrMYt26/rB4tyc/1YBb8AoOrgoQlJuSJxrA0BwOKhxTMBvqK8uWzFOXSzdjtfT6lLuMuoNTKOxTJH3OcVPmAXS+X0O3Zmr07ebSma3+nJiasto7u6QZSl0= Received: from BN1PR12CA0015.namprd12.prod.outlook.com (2603:10b6:408:e1::20) by SA0PR12MB4445.namprd12.prod.outlook.com (2603:10b6:806:95::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.12; Wed, 9 Feb 2022 17:27:35 +0000 Received: from BN8NAM11FT058.eop-nam11.prod.protection.outlook.com (2603:10b6:408:e1:cafe::3a) by BN1PR12CA0015.outlook.office365.com (2603:10b6:408:e1::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.12 via Frontend Transport; Wed, 9 Feb 2022 17:27:35 +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; Received: from SATLEXMB04.amd.com (165.204.84.17) by BN8NAM11FT058.mail.protection.outlook.com (10.13.177.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.4975.11 via Frontend Transport; Wed, 9 Feb 2022 17:27:35 +0000 Received: from ethanolx7ea3host.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 15.1.2375.18; Wed, 9 Feb 2022 11:27:34 -0600 From: Terry Bowman To: , , , , , , , CC: , , , , , , , , Subject: [PATCH v5 1/9] kernel/resource: Introduce request_mem_region_muxed() Date: Wed, 9 Feb 2022 11:27:09 -0600 Message-ID: <20220209172717.178813-2-terry.bowman@amd.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220209172717.178813-1-terry.bowman@amd.com> References: <20220209172717.178813-1-terry.bowman@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] 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-Office365-Filtering-Correlation-Id: 3f1e09fe-4eb8-4397-0302-08d9ebf17665 X-MS-TrafficTypeDiagnostic: SA0PR12MB4445:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; 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:(13230001)(4636009)(46966006)(36840700001)(40470700004)(8936002)(508600001)(316002)(110136005)(54906003)(82310400004)(5660300002)(83380400001)(44832011)(36756003)(40460700003)(2906002)(70206006)(4326008)(26005)(426003)(186003)(336012)(70586007)(2616005)(47076005)(8676002)(1076003)(6666004)(356005)(86362001)(81166007)(16526019)(7696005)(36860700001)(2101003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Feb 2022 17:27:35.4831 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3f1e09fe-4eb8-4397-0302-08d9ebf17665 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: BN8NAM11FT058.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4445 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Support for requesting muxed memory region is implemented but not currently callable as a macro. Add the request muxed memory region macro. MMIO memory accesses can be synchronized using request_mem_region() which is already available. This call will return failure if the resource is busy. The 'muxed' version of this macro will handle a busy resource by using a wait queue to retry until the resource is available. Signed-off-by: Terry Bowman Reviewed-by: Andy Shevchenko --- include/linux/ioport.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 8359c50f9988..ec5f71f7135b 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -262,6 +262,8 @@ resource_union(struct resource *r1, struct resource *r2, struct resource *r) #define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) #define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) +#define request_mem_region_muxed(start, n, name) \ + __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_MUXED) #define request_mem_region_exclusive(start,n,name) \ __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) #define rename_region(region, newname) do { (region)->name = (newname); } while (0)