From patchwork Mon Jul 18 17:49:38 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Milard X-Patchwork-Id: 72236 Delivered-To: patch@linaro.org Received: by 10.140.29.52 with SMTP id a49csp215212qga; Mon, 18 Jul 2016 10:05:12 -0700 (PDT) X-Received: by 10.37.14.84 with SMTP id 81mr23214167ybo.115.1468861511958; Mon, 18 Jul 2016 10:05:11 -0700 (PDT) Return-Path: Received: from lists.linaro.org (lists.linaro.org. [54.225.227.206]) by mx.google.com with ESMTP id s185si11390262qkb.256.2016.07.18.10.05.11; Mon, 18 Jul 2016 10:05:11 -0700 (PDT) Received-SPF: pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) client-ip=54.225.227.206; Authentication-Results: mx.google.com; spf=pass (google.com: domain of lng-odp-bounces@lists.linaro.org designates 54.225.227.206 as permitted sender) smtp.mailfrom=lng-odp-bounces@lists.linaro.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 913226808B; Mon, 18 Jul 2016 17:05:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ip-10-142-244-252 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by lists.linaro.org (Postfix) with ESMTP id 940A06805C; Mon, 18 Jul 2016 16:52:27 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 808716882A; Mon, 18 Jul 2016 16:52:13 +0000 (UTC) Received: from mail-lf0-f48.google.com (mail-lf0-f48.google.com [209.85.215.48]) by lists.linaro.org (Postfix) with ESMTPS id F204968799 for ; Mon, 18 Jul 2016 16:50:57 +0000 (UTC) Received: by mail-lf0-f48.google.com with SMTP id l69so79253472lfg.1 for ; Mon, 18 Jul 2016 09:50:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=/o/KWzZ1hZ+l5zIMgOsT7bdINiLKTL/zsGeWJPbGRN8=; b=VnD2TGueT7XZ9v7FmXKQclTtgWEdJEWP9r+WA59tJq3rC1qSBm6m9Twc9d5C0/uHE5 4qRt11RDP/xui2UESOdJ2KldgamRHWbohy0zo07ZjuNKC7ZAoQCc8gPVxwNYA5HL8m96 0eDKVeKh97POSJL2h7qd6XB0D59WzfH1CgljA3pdmPPbRGaEnYR1YhQ8WRJDF1f0/1ds TOE67QzYhc2bwPsMp7l6UG0afGSz7nJW1yGzFXXNrui9tZsTjntIWbnoiA6fRr+KCE8H YWRtLkvwB5+lNfMcRz11twklrxmAisxkWrsk3I2j7uVg+OUWbD71hvzv4Ivgo9310X5O SWlQ== X-Gm-Message-State: ALyK8tIYnjYh44G415Qim+XieYT44WhWl9Hn8U9tEeMDCtEKIp5XUt4F+ivVivXEpVLRjNYBCgw= X-Received: by 10.25.83.198 with SMTP id h189mr10646988lfb.130.1468860656837; Mon, 18 Jul 2016 09:50:56 -0700 (PDT) Received: from erachmi-ericsson.ki.sw.ericsson.se (c-83-233-90-46.cust.bredband2.com. [83.233.90.46]) by smtp.gmail.com with ESMTPSA id y200sm2226229lfd.12.2016.07.18.09.50.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Jul 2016 09:50:56 -0700 (PDT) From: Christophe Milard To: mike.holmes@linaro.org, yi.he@linaro.org, balakrishna.garapati@linaro.org, lng-odp@lists.linaro.org Date: Mon, 18 Jul 2016 19:49:38 +0200 Message-Id: <1468864178-43721-19-git-send-email-christophe.milard@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1468864178-43721-1-git-send-email-christophe.milard@linaro.org> References: <1468864178-43721-1-git-send-email-christophe.milard@linaro.org> X-Topics: patch Subject: [lng-odp] [API-NEXT PATCH 18/18] linux-generic: adding spinlock.h X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" duplicated from the API side (hash: 77a27212b563299959fb2a609b86bb9117a8f918.) Signed-off-by: Christophe Milard --- include/odp_drv.h | 1 + platform/linux-generic/Makefile.am | 5 ++- platform/linux-generic/drv_spinlock.c | 39 ++++++++++++++++++++++ .../include/odp/drv/plat/spinlock_types.h | 33 ++++++++++++++++++ platform/linux-generic/include/odp/drv/spinlock.h | 28 ++++++++++++++++ 5 files changed, 105 insertions(+), 1 deletion(-) create mode 100644 platform/linux-generic/drv_spinlock.c create mode 100644 platform/linux-generic/include/odp/drv/plat/spinlock_types.h create mode 100644 platform/linux-generic/include/odp/drv/spinlock.h -- 2.7.4 diff --git a/include/odp_drv.h b/include/odp_drv.h index 35e070c..776cf12 100644 --- a/include/odp_drv.h +++ b/include/odp_drv.h @@ -22,6 +22,7 @@ extern C { #include #include #include +#include #include #include diff --git a/platform/linux-generic/Makefile.am b/platform/linux-generic/Makefile.am index 109b42e..6bd95a3 100644 --- a/platform/linux-generic/Makefile.am +++ b/platform/linux-generic/Makefile.am @@ -97,13 +97,15 @@ odpdrvinclude_HEADERS = \ $(srcdir)/include/odp/drv/atomic.h \ $(srcdir)/include/odp/drv/byteorder.h \ $(srcdir)/include/odp/drv/compiler.h \ + $(srcdir)/include/odp/drv/spinlock.h \ $(srcdir)/include/odp/drv/std_types.h \ $(srcdir)/include/odp/drv/sync.h odpdrvplatincludedir = $(includedir)/odp/drv/plat odpdrvplatinclude_HEADERS = \ $(srcdir)/include/odp/drv/plat/atomic_types.h \ - $(srcdir)/include/odp/drv/plat/byteorder_types.h + $(srcdir)/include/odp/drv/plat/byteorder_types.h \ + $(srcdir)/include/odp/drv/plat/spinlock_types.h noinst_HEADERS = \ ${srcdir}/include/odp_align_internal.h \ @@ -201,6 +203,7 @@ __LIB__libodp_linux_la_SOURCES = \ odp_version.c \ odp_weak.c \ drv_atomic.c \ + drv_spinlock.c \ arch/@ARCH_DIR@/odp_cpu_arch.c \ arch/@ARCH_DIR@/odp_sysinfo_parse.c diff --git a/platform/linux-generic/drv_spinlock.c b/platform/linux-generic/drv_spinlock.c new file mode 100644 index 0000000..69e3da7 --- /dev/null +++ b/platform/linux-generic/drv_spinlock.c @@ -0,0 +1,39 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include + +void odpdrv_spinlock_init(odpdrv_spinlock_t *spinlock) +{ + _odp_atomic_flag_init(&spinlock->lock, 0); +} + +void odpdrv_spinlock_lock(odpdrv_spinlock_t *spinlock) +{ + /* While the lock is already taken... */ + while (_odp_atomic_flag_tas(&spinlock->lock)) + /* ...spin reading the flag (relaxed MM), + * the loop will exit when the lock becomes available + * and we will retry the TAS operation above */ + while (_odp_atomic_flag_load(&spinlock->lock)) + odp_cpu_pause(); +} + +int odpdrv_spinlock_trylock(odpdrv_spinlock_t *spinlock) +{ + return (_odp_atomic_flag_tas(&spinlock->lock) == 0); +} + +void odpdrv_spinlock_unlock(odpdrv_spinlock_t *spinlock) +{ + _odp_atomic_flag_clear(&spinlock->lock); +} + +int odpdrv_spinlock_is_locked(odpdrv_spinlock_t *spinlock) +{ + return _odp_atomic_flag_load(&spinlock->lock) != 0; +} diff --git a/platform/linux-generic/include/odp/drv/plat/spinlock_types.h b/platform/linux-generic/include/odp/drv/plat/spinlock_types.h new file mode 100644 index 0000000..41dd9ac --- /dev/null +++ b/platform/linux-generic/include/odp/drv/plat/spinlock_types.h @@ -0,0 +1,33 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODPDRV spinlock + */ + +#ifndef ODPDRV_SPINLOCK_TYPES_H_ +#define ODPDRV_SPINLOCK_TYPES_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/** @internal */ +struct odpdrv_spinlock_s { + char lock; /**< lock flag, should match odpdrv_atomic_flag_t */ +}; + +typedef struct odpdrv_spinlock_s odpdrv_spinlock_t; + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/platform/linux-generic/include/odp/drv/spinlock.h b/platform/linux-generic/include/odp/drv/spinlock.h new file mode 100644 index 0000000..dd05f8c --- /dev/null +++ b/platform/linux-generic/include/odp/drv/spinlock.h @@ -0,0 +1,28 @@ +/* Copyright (c) 2016, Linaro Limited + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/** + * @file + * + * ODPDRV spinlock + */ + +#ifndef ODPDRV_PLAT_SPINLOCK_H_ +#define ODPDRV_PLAT_SPINLOCK_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +#include + +#ifdef __cplusplus +} +#endif + +#endif