From patchwork Wed Aug 30 02:14:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chaoyong He X-Patchwork-Id: 130858 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 986C641FC8; Wed, 30 Aug 2023 04:18:24 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5ECD940A76; Wed, 30 Aug 2023 04:16:07 +0200 (CEST) Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2121.outbound.protection.outlook.com [40.107.93.121]) by mails.dpdk.org (Postfix) with ESMTP id 5C2DC4064E for ; Wed, 30 Aug 2023 04:16:04 +0200 (CEST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ChFTAu7BB5rxHHPNYrYTXbmGprLrQPicK2NrcGepz+vD84VYvV5CpZ945JKS02u/B1hzgjV5js+sWXUR/mjqG1AE3JB2Tb5Jil5b5ZqHkXNQvA2nyJi3M1HM2EBTKK7qQ/VctzBo91D2Yv1RA2nXYIRF0JfYri9YEArmrOps6nencndQhS9xisfoYQFgQgCp48rbh4gyj0CH/E//8PYX7CX5Q9k5pF4B4JDvOC63wo5FLMjirdmJCD1rXaaK5xcYI6vFgZQKz6bIutTnwjiF1OlwyiG6jPaQzl8fh+BeTY5wRStpMHUu/t444oLdh4ge23TGVBg2vKpUUryzmLOKVA== 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=PW2xHWL6QNyk3Ff7FWSfXySy6+lIgvRhxzehARxsxgc=; b=nAWdido8QVihu2/xDsFgwXmzWrAnZA7t/YfSKWUh6J0G0uYJq/Zle9oQES7Qpo9TBMHAnJ0NlMhrjXZAe2u/MrB/oSn+OHrGQfmtlg1TtVTZZ1ymv/TXI/QEvQ3+1+OLLEGtkJS1zOgP9ycbYGwH2btyL9qIpMaexNGMB+OQZECqU9S1inl/jpoPbvklSJHCafzK9pSviVPDMaqjKu+u0fk9PDX+eDAA+Ogu7mUKtBI4xqGQIHTN47SyfFbhxX/6NSzed+Jh6mVDOtoYNm7ScVuoI5d/8JC7LrJ4/kysIY/X4rR5f0kh7ACDGz8rrLwuH8Un9eIqr5NyjXP62HNttg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=corigine.com; dmarc=pass action=none header.from=corigine.com; dkim=pass header.d=corigine.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=corigine.onmicrosoft.com; s=selector2-corigine-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=PW2xHWL6QNyk3Ff7FWSfXySy6+lIgvRhxzehARxsxgc=; b=C0ITUEPNexH72FuiLF2cgPKG2c0UDocX9uKEo55qLngyDfKv9C32eGvJGlLY0PuK5eHs0dwgvFXgg49KtdG38ry8OmpmlPgFtWmvdt8WTfL/C1MJHWUIoqEL4zWxXQWGYKApLpDNJXI/ffJGBF4l4w4uiyZ0u8dt7zJKJYT6JeE= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=corigine.com; Received: from SJ0PR13MB5545.namprd13.prod.outlook.com (2603:10b6:a03:424::5) by DM6PR13MB3786.namprd13.prod.outlook.com (2603:10b6:5:229::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6745.18; Wed, 30 Aug 2023 02:16:02 +0000 Received: from SJ0PR13MB5545.namprd13.prod.outlook.com ([fe80::c0f3:c2cc:b5bb:4192]) by SJ0PR13MB5545.namprd13.prod.outlook.com ([fe80::c0f3:c2cc:b5bb:4192%4]) with mapi id 15.20.6699.034; Wed, 30 Aug 2023 02:16:02 +0000 From: Chaoyong He To: dev@dpdk.org Cc: oss-drivers@corigine.com, niklas.soderlund@corigine.com, Chaoyong He Subject: [PATCH v2 20/27] net/nfp: refact the mutex module Date: Wed, 30 Aug 2023 10:14:50 +0800 Message-Id: <20230830021457.2064750-21-chaoyong.he@corigine.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230830021457.2064750-1-chaoyong.he@corigine.com> References: <20230824110956.1943559-1-chaoyong.he@corigine.com> <20230830021457.2064750-1-chaoyong.he@corigine.com> X-ClientProxiedBy: PH0PR07CA0113.namprd07.prod.outlook.com (2603:10b6:510:4::28) To SJ0PR13MB5545.namprd13.prod.outlook.com (2603:10b6:a03:424::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR13MB5545:EE_|DM6PR13MB3786:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a82a9ea-d404-42c8-30bb-08dba8ff0ef3 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:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SJ0PR13MB5545.namprd13.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230031)(136003)(366004)(376002)(346002)(396003)(39830400003)(451199024)(186009)(1800799009)(6512007)(6916009)(316002)(38100700002)(41300700001)(38350700002)(2906002)(4326008)(66574015)(30864003)(83380400001)(2616005)(86362001)(44832011)(26005)(36756003)(1076003)(8676002)(5660300002)(107886003)(8936002)(6666004)(6506007)(6486002)(66556008)(66946007)(66476007)(52116002)(478600001); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?qOuemsN7KevcbNAOM4JGF2UZ17kb?= =?utf-8?q?nW9d9j9tLl8ONtwkQZO23fDQIHXTlUi9qx+UWqzkkJtHbx1osggHpCF5JAFJOC+5H?= =?utf-8?q?aFpbMesGtRfJ9DwHHkAO/p/JSo/XlnQMWWG1Qca0zbsH8NCdm9V9ngLHCWOe9GVDc?= =?utf-8?q?hnDNVo/b8M8a+FBigIh3T9ikj7gEyXcYh4Qae64xa1YsygHkZEvRAGjcY37fGQC1K?= =?utf-8?q?BMyfAcemqWjJpT1/FiTfhNkAc1V7bmLYwDb+Rs0Y9hXzQxtUdta2woui7VBQIRq0D?= =?utf-8?q?x/gYHH0aNFzegTtc55Es12iQ2RaVVQCMVD8nZLXwB1LiD3KE0UFA2Dk99Hz6620hR?= =?utf-8?q?TXm7RIPrXEm5A+jaupJpCogb2iFsVGIRv9QnbWE3e+rJa/souiNSaZDY5u5nNaav8?= =?utf-8?q?nzAmCu3uOmsA3u5USczM+rMvxN8QCjIl0SQQxXIQoaUG8IjaTKPvLiqYOLB04vxqv?= =?utf-8?q?2eRpyDmX1aGU7R5R5ubnzZLqCMZ0O7DvdxKQPxPedayVHDY+WuAP2Km4BSVcNRSJZ?= =?utf-8?q?h++AvS80oxfWN+3dLTDlYknu8X6BKcPARJbTF3CVV+PfM+HhWL2eahz+9v2d5OwVJ?= =?utf-8?q?vE9y6CREwK+ygNiouG37vx+9ktILDnih9fBLbZGvbO3cjwG6dBza88pmTFyD3uMgc?= =?utf-8?q?LqMD15amY32z1khaG0rI+PSJ1BfiNTIyi1DW76jJb0xW3aYLrGshlG8Ebw+8FU4p3?= =?utf-8?q?7Ei6qOblv1y78/rDmb9EaO+auR373vjYl3cAT6O4TR6hHub0FonYqAxmqz0cNlcqy?= =?utf-8?q?PXa61PDrZg4BuZwnaRIWf5ORBhp6HnKRtu4XUSMAevHh4y1KdSZ6YoJdQ9S/4II5C?= =?utf-8?q?5rkKHIDanjPPq+PYppP/b7HC9IKzLD6TEV0mPTkiHbL0HG32kIDRydohh6epCYfL2?= =?utf-8?q?1jn8pBkl7bFvmhJYO8bOvAFydsr5Zs4Xzwl1EYq3era0rG78gl5y85gN+6d4udOzh?= =?utf-8?q?GSHxojBfI442B+RFmriTYJxJTJ/a1phl3VhdE6aCI4HB1oLRrrwZ3mZ3nlgJBNa5K?= =?utf-8?q?ftdu7hSFxNZnpKTic2wyrt1DTgrb1CPpNf3ACBrTSZzCC9pBCffJbRTy19wqFwWmF?= =?utf-8?q?3+5gN/MzBhIO/sqYs8KBA/FtcmeRhXDOG2xjiqgV9lJH0KXo0VhF1bDUMs+qyMQ9y?= =?utf-8?q?otMZ7iGWysKsxzZcs8BeoCfxEAuoajFbyIfn66V5hM48gnNGpzP/iwzsLnw7TsSRm?= =?utf-8?q?Ll1797s7GhcjE2GOJe1mRpHIi1a8NU3cTKuQMxPbtczBySuMrBuFTrrqspaRtKdc2?= =?utf-8?q?C53VcjILl4guPf36i1vMtP8Sw1Ra24XA9loBhgXAKJ1Bx/GpPVpmF7ounxgtktGPp?= =?utf-8?q?TdFJHue/0meEUk1YL4Uz9ohJUpHlODg8n/U1lKc6h8kx9ZYXSVqb0tnE9Z3lYVcvb?= =?utf-8?q?9zbWGwxl0sIULOgsGUX6lFbOfX8P6D8/uGnpHQyU4QEV5gDD7mNNOqQ2H8FJubJ/3?= =?utf-8?q?oqemcMKptMYhNml75KLWW2MnJ2EjliYEFLbPgDQZrtcjQ1UBp7p6RtH21AxihRqxF?= =?utf-8?q?aCplltsvb4CPDek1vdc06QmuSd5ReIyKkQ=3D=3D?= X-OriginatorOrg: corigine.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2a82a9ea-d404-42c8-30bb-08dba8ff0ef3 X-MS-Exchange-CrossTenant-AuthSource: SJ0PR13MB5545.namprd13.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Aug 2023 02:16:02.7543 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: fe128f2c-073b-4c20-818e-7246a585940c X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ytvlFI579d7RnD53R2AxwUiXadBFCDl9B/BJ4i8s4E/n5zcOckVKHPXrOsuSUye0j2Jm8RQkTERhc8/fRqQG2+Buu37yxIum7N6/HyAkc1Y= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR13MB3786 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Add a header file to holds the API declarations of this module. Also sync the logic from kernel driver and remove the unneeded header file include statements. Signed-off-by: Chaoyong He Reviewed-by: Niklas Söderlund --- drivers/net/nfp/nfpcore/nfp_cpp.h | 16 -- drivers/net/nfp/nfpcore/nfp_mutex.c | 205 ++++++++++++++----------- drivers/net/nfp/nfpcore/nfp_mutex.h | 25 +++ drivers/net/nfp/nfpcore/nfp_resource.c | 1 + 4 files changed, 138 insertions(+), 109 deletions(-) create mode 100644 drivers/net/nfp/nfpcore/nfp_mutex.h diff --git a/drivers/net/nfp/nfpcore/nfp_cpp.h b/drivers/net/nfp/nfpcore/nfp_cpp.h index be7ae1d919..42c4df5fdd 100644 --- a/drivers/net/nfp/nfpcore/nfp_cpp.h +++ b/drivers/net/nfp/nfpcore/nfp_cpp.h @@ -8,8 +8,6 @@ #include -struct nfp_cpp_mutex; - /* NFP CPP handle */ struct nfp_cpp { uint32_t model; @@ -426,20 +424,6 @@ int nfp_cpp_readq(struct nfp_cpp *cpp, uint32_t cpp_id, int nfp_cpp_writeq(struct nfp_cpp *cpp, uint32_t cpp_id, uint64_t address, uint64_t value); -int nfp_cpp_mutex_init(struct nfp_cpp *cpp, int target, - uint64_t address, uint32_t key_id); - -struct nfp_cpp_mutex *nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, int target, - uint64_t address, uint32_t key_id); - -void nfp_cpp_mutex_free(struct nfp_cpp_mutex *mutex); - -int nfp_cpp_mutex_lock(struct nfp_cpp_mutex *mutex); - -int nfp_cpp_mutex_unlock(struct nfp_cpp_mutex *mutex); - -int nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex); - uint32_t nfp_cpp_mu_locality_lsb(struct nfp_cpp *cpp); #endif /* __NFP_CPP_H__ */ diff --git a/drivers/net/nfp/nfpcore/nfp_mutex.c b/drivers/net/nfp/nfpcore/nfp_mutex.c index 87a9351ff9..9363543422 100644 --- a/drivers/net/nfp/nfpcore/nfp_mutex.c +++ b/drivers/net/nfp/nfpcore/nfp_mutex.c @@ -3,21 +3,13 @@ * All rights reserved. */ -#include -#include +#include "nfp_mutex.h" + #include -#include "nfp_cpp.h" #include "nfp_logs.h" #include "nfp_target.h" -#define MUTEX_LOCKED(interface) ((((uint32_t)(interface)) << 16) | 0x000f) -#define MUTEX_UNLOCK(interface) (0 | 0x0000) - -#define MUTEX_IS_LOCKED(value) (((value) & 0xffff) == 0x000f) -#define MUTEX_IS_UNLOCKED(value) (((value) & 0xffff) == 0x0000) -#define MUTEX_INTERFACE(value) (((value) >> 16) & 0xffff) - /* * If you need more than 65536 recursive locks, please * rethink your code. @@ -34,21 +26,51 @@ struct nfp_cpp_mutex { struct nfp_cpp_mutex *prev, *next; }; +static inline uint32_t +nfp_mutex_locked(uint16_t interface) +{ + return (uint32_t)interface << 16 | 0x000f; +} + +static inline uint32_t +nfp_mutex_unlocked(uint16_t interface) +{ + return (uint32_t)interface << 16 | 0x0000; +} + +static inline uint16_t +nfp_mutex_owner(uint32_t val) +{ + return (val >> 16) & 0xffff; +} + +static inline bool +nfp_mutex_is_locked(uint32_t val) +{ + return (val & 0xffff) == 0x000f; +} + +static inline bool +nfp_mutex_is_unlocked(uint32_t val) +{ + return (val & 0xffff) == 0; +} + static int -nfp_cpp_mutex_validate(uint32_t model, +nfp_cpp_mutex_validate(uint16_t interface, int *target, uint64_t address) { + /* Not permitted on invalid interfaces */ + if (NFP_CPP_INTERFACE_TYPE_of(interface) == NFP_CPP_INTERFACE_TYPE_INVALID) + return -EINVAL; + /* Address must be 64-bit aligned */ if ((address & 7) != 0) return -EINVAL; - if (NFP_CPP_MODEL_IS_6000(model)) { - if (*target != NFP_CPP_TARGET_MU) - return -EINVAL; - } else { + if (*target != NFP_CPP_TARGET_MU) return -EINVAL; - } return 0; } @@ -84,10 +106,10 @@ nfp_cpp_mutex_init(struct nfp_cpp *cpp, uint32_t key) { int err; - uint32_t model = nfp_cpp_model(cpp); uint32_t muw = NFP_CPP_ID(target, 4, 0); /* atomic_write */ + uint16_t interface = nfp_cpp_interface(cpp); - err = nfp_cpp_mutex_validate(model, &target, address); + err = nfp_cpp_mutex_validate(interface, &target, address); if (err < 0) return err; @@ -95,8 +117,7 @@ nfp_cpp_mutex_init(struct nfp_cpp *cpp, if (err < 0) return err; - err = nfp_cpp_writel(cpp, muw, address + 0, - MUTEX_LOCKED(nfp_cpp_interface(cpp))); + err = nfp_cpp_writel(cpp, muw, address, nfp_mutex_locked(interface)); if (err < 0) return err; @@ -133,26 +154,10 @@ nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, int err; uint32_t tmp; struct nfp_cpp_mutex *mutex; - uint32_t model = nfp_cpp_model(cpp); uint32_t mur = NFP_CPP_ID(target, 3, 0); /* atomic_read */ + uint16_t interface = nfp_cpp_interface(cpp); - /* Look for cached mutex */ - for (mutex = cpp->mutex_cache; mutex; mutex = mutex->next) { - if (mutex->target == target && mutex->address == address) - break; - } - - if (mutex) { - if (mutex->key == key) { - mutex->usage++; - return mutex; - } - - /* If the key doesn't match... */ - return NULL; - } - - err = nfp_cpp_mutex_validate(model, &target, address); + err = nfp_cpp_mutex_validate(interface, &target, address); if (err < 0) return NULL; @@ -172,16 +177,6 @@ nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, mutex->address = address; mutex->key = key; mutex->depth = 0; - mutex->usage = 1; - - /* Add mutex to the cache */ - if (cpp->mutex_cache) { - cpp->mutex_cache->prev = mutex; - mutex->next = cpp->mutex_cache; - cpp->mutex_cache = mutex; - } else { - cpp->mutex_cache = mutex; - } return mutex; } @@ -195,20 +190,6 @@ nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, void nfp_cpp_mutex_free(struct nfp_cpp_mutex *mutex) { - mutex->usage--; - if (mutex->usage > 0) - return; - - /* Remove mutex from the cache */ - if (mutex->next) - mutex->next->prev = mutex->prev; - if (mutex->prev) - mutex->prev->next = mutex->next; - - /* If mutex->cpp == NULL, something broke */ - if (mutex->cpp && mutex == mutex->cpp->mutex_cache) - mutex->cpp->mutex_cache = mutex->next; - rte_free(mutex); } @@ -268,32 +249,28 @@ nfp_cpp_mutex_unlock(struct nfp_cpp_mutex *mutex) return 0; } - err = nfp_cpp_readl(mutex->cpp, mur, mutex->address, &value); - if (err < 0) - goto exit; - err = nfp_cpp_readl(mutex->cpp, mur, mutex->address + 4, &key); if (err < 0) - goto exit; + return err; - if (key != mutex->key) { - err = -EPERM; - goto exit; - } + if (key != mutex->key) + return -EPERM; - if (value != MUTEX_LOCKED(interface)) { - err = -EACCES; - goto exit; - } + err = nfp_cpp_readl(mutex->cpp, mur, mutex->address, &value); + if (err < 0) + return err; + + if (value != nfp_mutex_locked(interface)) + return -EACCES; - err = nfp_cpp_writel(cpp, muw, mutex->address, MUTEX_UNLOCK(interface)); + err = nfp_cpp_writel(cpp, muw, mutex->address, + nfp_mutex_unlocked(interface)); if (err < 0) - goto exit; + return err; mutex->depth = 0; -exit: - return err; + return 0; } /** @@ -332,19 +309,17 @@ nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex) /* Verify that the lock marker is not damaged */ err = nfp_cpp_readl(cpp, mur, mutex->address + 4, &key); if (err < 0) - goto exit; + return err; - if (key != mutex->key) { - err = -EPERM; - goto exit; - } + if (key != mutex->key) + return -EPERM; /* * Compare against the unlocked state, and if true, * write the interface id into the top 16 bits, and * mark as locked. */ - value = MUTEX_LOCKED(nfp_cpp_interface(cpp)); + value = nfp_mutex_locked(nfp_cpp_interface(cpp)); /* * We use test_set_imm here, as it implies a read @@ -361,10 +336,10 @@ nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex) */ err = nfp_cpp_readl(cpp, mus, mutex->address, &tmp); if (err < 0) - goto exit; + return err; /* Was it unlocked? */ - if (MUTEX_IS_UNLOCKED(tmp)) { + if (nfp_mutex_is_unlocked(tmp)) { /* * The read value can only be 0x....0000 in the unlocked state. * If there was another contending for this lock, then @@ -376,20 +351,64 @@ nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex) */ err = nfp_cpp_writel(cpp, muw, mutex->address, value); if (err < 0) - goto exit; + return err; mutex->depth = 1; - goto exit; + return 0; } /* Already locked by us? Success! */ if (tmp == value) { mutex->depth = 1; - goto exit; + return 0; } - err = MUTEX_IS_LOCKED(tmp) ? -EBUSY : -EINVAL; + return nfp_mutex_is_locked(tmp) ? -EBUSY : -EINVAL; +} + +/** + * Release lock if held by local system. + * Extreme care is advised, call only when no local lock users can exist. + * + * @param cpp + * NFP CPP handle + * @param target + * NFP CPP target ID (ie NFP_CPP_TARGET_CLS or NFP_CPP_TARGET_MU) + * @param address + * Offset into the address space of the NFP CPP target ID + * + * @return + * - (0) if the lock was OK + * - (1) if locked by us + * - (-errno) on invalid mutex + */ +int +nfp_cpp_mutex_reclaim(struct nfp_cpp *cpp, + int target, + uint64_t address) +{ + int err; + uint32_t tmp; + uint16_t interface = nfp_cpp_interface(cpp); + const uint32_t mur = NFP_CPP_ID(target, 3, 0); /* atomic_read */ + const uint32_t muw = NFP_CPP_ID(target, 4, 0); /* atomic_write */ + + err = nfp_cpp_mutex_validate(interface, &target, address); + if (err != 0) + return err; + + /* Check lock */ + err = nfp_cpp_readl(cpp, mur, address, &tmp); + if (err < 0) + return err; + + if (nfp_mutex_is_unlocked(tmp) || nfp_mutex_owner(tmp) != interface) + return 0; + + /* Bust the lock */ + err = nfp_cpp_writel(cpp, muw, address, nfp_mutex_unlocked(interface)); + if (err < 0) + return err; -exit: - return err; + return 1; } diff --git a/drivers/net/nfp/nfpcore/nfp_mutex.h b/drivers/net/nfp/nfpcore/nfp_mutex.h new file mode 100644 index 0000000000..a79490b4d6 --- /dev/null +++ b/drivers/net/nfp/nfpcore/nfp_mutex.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2023 Corigine, Inc. + * All rights reserved. + */ + +#ifndef __NFP_MUTEX_H__ +#define __NFP_MUTEX_H__ + +#include "nfp_cpp.h" + +struct nfp_cpp_mutex; + +int nfp_cpp_mutex_init(struct nfp_cpp *cpp, int target, + uint64_t address, uint32_t key_id); + +struct nfp_cpp_mutex *nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, int target, + uint64_t address, uint32_t key_id); + +void nfp_cpp_mutex_free(struct nfp_cpp_mutex *mutex); +int nfp_cpp_mutex_lock(struct nfp_cpp_mutex *mutex); +int nfp_cpp_mutex_unlock(struct nfp_cpp_mutex *mutex); +int nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex); +int nfp_cpp_mutex_reclaim(struct nfp_cpp *cpp, int target, uint64_t address); + +#endif /* __NFP_MUTEX_H__ */ diff --git a/drivers/net/nfp/nfpcore/nfp_resource.c b/drivers/net/nfp/nfpcore/nfp_resource.c index ee987c4438..c4cc7f42f6 100644 --- a/drivers/net/nfp/nfpcore/nfp_resource.c +++ b/drivers/net/nfp/nfpcore/nfp_resource.c @@ -7,6 +7,7 @@ #include "nfp_crc.h" #include "nfp_logs.h" +#include "nfp_mutex.h" #include "nfp_target.h" #define NFP_RESOURCE_TBL_TARGET NFP_CPP_TARGET_MU