From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-4101065-1525230477-2-9501734708277397408 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, MAILING_LIST_MULTI -1, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1525230477; b=O4vtA36b2/bsumX/F6v3BozgpQx8CikN27uYzZ62l0IRGUNoDy puAQeQV8Ep/zXVlhoSM6NTND6MwogHy3jQlg1Vl5j86swzeiCv2hP5nuvVXiXbfj rUWRIVtCNOqx7xp4XoJQ48OoPp3ui7N4kghNt7dI5poG74Puklh/I7B1aZKg1kKL ZnSyvdfXZcNtjzm9/BzJDaxRzS6RRIf6roAAJNGnkMw25AcuSumu6ZiZrRftLV2K +k81XQNUKieVQG0zsvHwQoRNezgODp2T7+AdpPuAZ9nTve1Az1YIrtpS+UkvKTTe UVqEYBVCvl1PCISZ8WHk9R4U+iCWyH7cNbwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:sender:list-id; s=fm2; t=1525230477; bh= JTTk1SlxZZFd0VNvIt4hGdKLUZMOYFoNrX30rx9MwKk=; b=Z9D7j6rEy9RedTTU RBzipR8xgpa/vAxNPv7b1PtcoMMK7Tand6CiyfdkUYOjqQCcSv5cqPuVg2VYQstl jhgu3L+77QZxgPIwviO6HK2rN2LUiXNBJPBpyzpHCgPv+8AKguKZ6bbOLqKPom0p zzr2sZEOQpeX63U0OGpSgZ3j0lrZJrC+09k2gmjHbRhAYUaqSGyp+o7YA5iJICAL H4A0YPduyCP54q8AzgUG+kp0MVMTRGdsy4CPbY5TNRPLtLCVm86Vw/wJ0vyEHY81 eWKv484/V+QSldjBqkY0XQMTvh0WqGtByuouMW+xBJPAyqJDru1ILPweo2YeGX/j 2Z3T+Q== ARC-Authentication-Results: i=1; mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=intel.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=intel.com header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=intel.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=intel.com header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfDeuAcun9dNDQZoxg8ioJ+DAqFsP6MfdDaI0TQ062wsfgcwPcOKHsK1PgjNHvdAJx9AipxwzVxdYe7Wr0hP+ipeZ1Xb0ph4TGEFixt0OHp5CO4lbd89e oU8YieNAEM+biT8f5zrYXM6/Uy1d+YX/zcAR1u3de6r+Lb1+32xkxkB3J8fPnZIbhfmDvbe1ECKQ++jqJSrGwOYtfbFivv1F1pGmj+F46kosi6P8O6uV936Z X-CM-Analysis: v=2.3 cv=FKU1Odgs c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=VUJBJC2UJ8kA:10 a=QyXUC8HyAAAA:8 a=VwQbUJbxAAAA:8 a=7mDuTfA3LRDM-GoIaDYA:9 a=x8gzFH9gYPwA:10 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751472AbeEBDHb (ORCPT ); Tue, 1 May 2018 23:07:31 -0400 Received: from mga12.intel.com ([192.55.52.136]:63837 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751359AbeEBDCB (ORCPT ); Tue, 1 May 2018 23:02:01 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,353,1520924400"; d="scan'208";a="46058318" From: Wu Hao To: atull@kernel.org, mdf@kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linux-api@vger.kernel.org, luwei.kang@intel.com, yi.z.zhang@intel.com, hao.wu@intel.com, Tim Whisonant , Enno Luebbers , Shiva Rao , Christopher Rauer , Xiao Guangrong Subject: [PATCH v5 08/28] fpga: dfl: add dfl_fpga_cdev_find_port Date: Wed, 2 May 2018 10:50:11 +0800 Message-Id: <1525229431-3087-9-git-send-email-hao.wu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525229431-3087-1-git-send-email-hao.wu@intel.com> References: <1525229431-3087-1-git-send-email-hao.wu@intel.com> Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: For feature devices, we need a method to find the port dedicated to the device. This patch adds a function dfl_fpga_cdev_find_port for this purpose. e.g FPGA Management Engine (FME) Partial Reconfiguration sub feature, it uses this function to find dedicated port on the device for PR function implementation. Signed-off-by: Tim Whisonant Signed-off-by: Enno Luebbers Signed-off-by: Shiva Rao Signed-off-by: Christopher Rauer Signed-off-by: Xiao Guangrong Signed-off-by: Wu Hao Acked-by: Alan Tull Acked-by: Moritz Fischer --- v3: s/fpga_for_each_port/fpga_cdev_find_port/ move fpga_cdev_find_port to fpga-dfl module. v4: improve description in commit message. add comments to remind user to put_device after use this function. v5: add "dfl_" prefix to functions. improve function comments per suggestion from Alan Tull. add Acked-by from Alan and Moritz. --- drivers/fpga/dfl.c | 32 ++++++++++++++++++++++++++++++++ drivers/fpga/dfl.h | 21 +++++++++++++++++++++ 2 files changed, 53 insertions(+) diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 18aba02..1e06efb 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -795,6 +795,38 @@ void dfl_fpga_remove_feature_devs(struct dfl_fpga_cdev *cdev) } EXPORT_SYMBOL_GPL(dfl_fpga_remove_feature_devs); +/** + * __dfl_fpga_cdev_find_port - find a port under given container device + * + * @cdev: container device + * @data: data passed to match function + * @match: match function used to find specific port from the port device list + * + * Find a port device under container device. This function needs to be + * invoked with lock held. + * + * Return: pointer to port's platform device if successful, NULL otherwise. + * + * NOTE: you will need to drop the device reference with put_device() after use. + */ +struct platform_device * +__dfl_fpga_cdev_find_port(struct dfl_fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)) +{ + struct dfl_feature_platform_data *pdata; + struct platform_device *port_dev; + + list_for_each_entry(pdata, &cdev->port_dev_list, node) { + port_dev = pdata->dev; + + if (match(port_dev, data) && get_device(&port_dev->dev)) + return port_dev; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__dfl_fpga_cdev_find_port); + static int __init dfl_fpga_init(void) { int ret; diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h index 5fcb1a1..2b6aaef 100644 --- a/drivers/fpga/dfl.h +++ b/drivers/fpga/dfl.h @@ -290,4 +290,25 @@ struct dfl_fpga_cdev * dfl_fpga_enumerate_feature_devs(struct dfl_fpga_enum_info *info); void dfl_fpga_remove_feature_devs(struct dfl_fpga_cdev *cdev); +/* + * need to drop the device reference with put_device() after use port platform + * device returned by __dfl_fpga_cdev_find_port and dfl_fpga_cdev_find_port + * functions. + */ +struct platform_device * +__dfl_fpga_cdev_find_port(struct dfl_fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)); + +static inline struct platform_device * +dfl_fpga_cdev_find_port(struct dfl_fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)) +{ + struct platform_device *pdev; + + mutex_lock(&cdev->lock); + pdev = __dfl_fpga_cdev_find_port(cdev, data, match); + mutex_unlock(&cdev->lock); + + return pdev; +} #endif /* __FPGA_DFL_H */ -- 1.8.3.1