From patchwork Thu Apr 20 14:09:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Tull X-Patchwork-Id: 9690623 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 642BA60326 for ; Thu, 20 Apr 2017 14:15:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B73628471 for ; Thu, 20 Apr 2017 14:15:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 506E728479; Thu, 20 Apr 2017 14:15:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED55728471 for ; Thu, 20 Apr 2017 14:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1032415AbdDTOPB (ORCPT ); Thu, 20 Apr 2017 10:15:01 -0400 Received: from mail.kernel.org ([198.145.29.136]:59996 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032178AbdDTOKo (ORCPT ); Thu, 20 Apr 2017 10:10:44 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E2FDC20103; Thu, 20 Apr 2017 14:10:36 +0000 (UTC) Received: from localhost.localdomain (user-0ccsrjt.cable.mindspring.com [24.206.110.125]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5D8E8201B9; Thu, 20 Apr 2017 14:10:35 +0000 (UTC) From: Alan Tull To: Moritz Fischer Cc: Alan Tull , linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org Subject: [PATCH v2 07/16] fpga: region: get mgr early on Date: Thu, 20 Apr 2017 09:09:52 -0500 Message-Id: <1492697401-11211-8-git-send-email-atull@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1492697401-11211-1-git-send-email-atull@kernel.org> References: <1492697401-11211-1-git-send-email-atull@kernel.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Get the FPGA manager during region creation. This is a baby step in refactoring the FPGA region code to separate out common FPGA region code from FPGA region Device Tree overlay support. Signed-off-by: Alan Tull --- v2: split out from another patch --- drivers/fpga/fpga-region.c | 45 +++++++++++++++++++++++---------------------- 1 file changed, 23 insertions(+), 22 deletions(-) diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index 6784357..7ff5426 100644 --- a/drivers/fpga/fpga-region.c +++ b/drivers/fpga/fpga-region.c @@ -31,12 +31,14 @@ * @dev: FPGA Region device * @mutex: enforces exclusive reference to region * @bridge_list: list of FPGA bridges specified in region + * @mgr: FPGA manager * @info: fpga image specific information */ struct fpga_region { struct device dev; struct mutex mutex; /* for exclusive reference to region */ struct list_head bridge_list; + struct fpga_manager *mgr; struct fpga_image_info *info; }; @@ -123,7 +125,7 @@ static void fpga_region_put(struct fpga_region *region) /** * fpga_region_get_manager - get reference for FPGA manager - * @region: FPGA region + * @np: device node of FPGA region * * Get FPGA Manager from "fpga-mgr" property or from ancestor region. * @@ -131,10 +133,8 @@ static void fpga_region_put(struct fpga_region *region) * * Return: fpga manager struct or IS_ERR() condition containing error code. */ -static struct fpga_manager *fpga_region_get_manager(struct fpga_region *region) +static struct fpga_manager *fpga_region_get_manager(struct device_node *np) { - struct device *dev = ®ion->dev; - struct device_node *np = dev->of_node; struct device_node *mgr_node; struct fpga_manager *mgr; @@ -231,7 +231,6 @@ static int fpga_region_program_fpga(struct fpga_region *region, struct device_node *overlay) { struct device *dev = ®ion->dev; - struct fpga_manager *mgr; int ret; region = fpga_region_get(region); @@ -240,17 +239,10 @@ static int fpga_region_program_fpga(struct fpga_region *region, return PTR_ERR(region); } - mgr = fpga_region_get_manager(region); - if (IS_ERR(mgr)) { - dev_err(dev, "failed to get FPGA manager\n"); - ret = PTR_ERR(mgr); - goto err_put_region; - } - - ret = fpga_mgr_lock(mgr); + ret = fpga_mgr_lock(region->mgr); if (ret) { dev_err(dev, "FPGA manager is busy\n"); - goto err_put_mgr; + goto err_put_region; } ret = fpga_region_get_bridges(region, overlay); @@ -265,7 +257,7 @@ static int fpga_region_program_fpga(struct fpga_region *region, goto err_put_br; } - ret = fpga_mgr_load(mgr, region->info); + ret = fpga_mgr_load(region->mgr, region->info); if (ret) { dev_err(dev, "failed to load FPGA image\n"); goto err_put_br; @@ -277,8 +269,7 @@ static int fpga_region_program_fpga(struct fpga_region *region, goto err_put_br; } - fpga_mgr_unlock(mgr); - fpga_mgr_put(mgr); + fpga_mgr_unlock(region->mgr); fpga_region_put(region); return 0; @@ -286,9 +277,7 @@ static int fpga_region_program_fpga(struct fpga_region *region, err_put_br: fpga_bridges_put(®ion->bridge_list); err_unlock_mgr: - fpga_mgr_unlock(mgr); -err_put_mgr: - fpga_mgr_put(mgr); + fpga_mgr_unlock(region->mgr); err_put_region: fpga_region_put(region); @@ -517,11 +506,20 @@ static int fpga_region_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct fpga_region *region; + struct fpga_manager *mgr; int id, ret = 0; + mgr = fpga_region_get_manager(np); + if (IS_ERR(mgr)) + return -EPROBE_DEFER; + region = kzalloc(sizeof(*region), GFP_KERNEL); - if (!region) - return -ENOMEM; + if (!region) { + ret = -ENOMEM; + goto err_put_mgr; + } + + region->mgr = mgr; id = ida_simple_get(&fpga_region_ida, 0, 0, GFP_KERNEL); if (id < 0) { @@ -557,6 +555,8 @@ static int fpga_region_probe(struct platform_device *pdev) ida_simple_remove(&fpga_region_ida, id); err_kfree: kfree(region); +err_put_mgr: + fpga_mgr_put(mgr); return ret; } @@ -566,6 +566,7 @@ static int fpga_region_remove(struct platform_device *pdev) struct fpga_region *region = platform_get_drvdata(pdev); device_unregister(®ion->dev); + fpga_mgr_put(region->mgr); return 0; }