From patchwork Fri Oct 1 17:52:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 12531339 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2700C433EF for ; Fri, 1 Oct 2021 17:53:21 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A039C61A8E for ; Fri, 1 Oct 2021 17:53:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A039C61A8E Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A11456EEA7; Fri, 1 Oct 2021 17:53:00 +0000 (UTC) Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2059.outbound.protection.outlook.com [40.107.94.59]) by gabe.freedesktop.org (Postfix) with ESMTPS id 796E06EE94; Fri, 1 Oct 2021 17:52:57 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ja5oLVQG+d4lHvrz9d9b94sh4TUn7mhlwX0rtdZAMYdaEIeYEixuXniDxy1783vjZzU7kTSzDZxyXwbOQXaZTh4culfJ+51xNxTGN3on1QgKzTz9yK3u9xqn8lHPZfm7IyNMeetrwa2axrmehgGm/ZuBoTIx2rx/fdcGOlQa9G0q5gekKNscWkH3tF0e0DXdKWi1V1i5poHsTn+V5jAtBS78FwBsG8eV9bkdghLcE9ut12lToHdisx4JUzDpwrt5RrL4R4lnKFPPzZG2JsbQ4j3iGEaHwgiw7lT8AQSUSKC5omBEWa8bClxgPbyP/+LCpsNnOEdIJpvzv+X2lSJDxA== 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=YTh6ZUm2PrgORCNyCbn+2r3MpGIT/x7JNE9sdNM2aA8=; b=hv11hZzKoABxKudnyI74NBAwHIFDJ5YRUPJfjuY2d3aU380gFZTaELeyG5ssQ+XrFzAknvs5YumCXookENBRnXdMKdFEGCzkUkEBglyayIUG9MhgYLlNVtpFVPvpc1HJ4BIjlM9UuDw4guXTM92UauO5rI1iGzo9GDXEcWo1g/k1Idm45VvZXtKIPywPhSntLlFnFH0+ylB8ruKO+uknoymXuXTBGSc08b0VuSbbcxiZXu+0C7u+hTsMN9Mt5fkfSmqomVHHZla52DFrHhmV0eSdBemBTcibIgoiCgujNQU9wkKhPzsrPNpgAJMX25B5DsHnk6NVWcjX0I9dUeB18Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=YTh6ZUm2PrgORCNyCbn+2r3MpGIT/x7JNE9sdNM2aA8=; b=K7HkYFW7jun+CwGwq0fl53dyXWIUuWhXUDMdjBgJg61RSRUFoXva92FsHn9wlCn0d7E/HutYzBQCsRh5prdJZPALmWLZrzWWA/K4VavcdttJc5BzxQ+ktEkNfVCTwY8IdihLLLt1NBb5cA374SU38cTDumWGsNJ4uNE/if8jI6vuo/X7kB/IStAgIUKf4GS0ZOQvV8QR5AwCZYIj966a4IOwW8g1wfChsp7XJx9ckygUTrArbX7Ea8U87QdNOJMR44hlcQLoeHhJ1ywtth8dtzqYw6ylBj0Rb7TTDx4GrZrvykek7RVD2vU9aReEgyNNC6dine/s5LAAYavVE5dSZg== Authentication-Results: linux.ie; dkim=none (message not signed) header.d=none;linux.ie; dmarc=none action=none header.from=nvidia.com; Received: from BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) by BL1PR12MB5207.namprd12.prod.outlook.com (2603:10b6:208:318::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4566.14; Fri, 1 Oct 2021 17:52:56 +0000 Received: from BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::e8af:232:915e:2f95]) by BL0PR12MB5506.namprd12.prod.outlook.com ([fe80::e8af:232:915e:2f95%8]) with mapi id 15.20.4566.019; Fri, 1 Oct 2021 17:52:56 +0000 From: Jason Gunthorpe To: David Airlie , Tony Krowiak , Alex Williamson , Christian Borntraeger , Cornelia Huck , Jonathan Corbet , Daniel Vetter , dri-devel@lists.freedesktop.org, Eric Farman , Harald Freudenberger , Vasily Gorbik , Heiko Carstens , intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, Jani Nikula , Jason Herne , Joonas Lahtinen , kvm@vger.kernel.org, Kirti Wankhede , linux-doc@vger.kernel.org, linux-s390@vger.kernel.org, Matthew Rosato , Peter Oberparleiter , Halil Pasic , Rodrigo Vivi , Vineeth Vijayan , Zhenyu Wang , Zhi Wang Cc: Christoph Hellwig , Christoph Hellwig Subject: [PATCH v3 02/10] vfio/ccw: Use functions for alloc/free of the vfio_ccw_private Date: Fri, 1 Oct 2021 14:52:43 -0300 Message-Id: <2-v3-57c1502c62fd+2190-ccw_mdev_jgg@nvidia.com> In-Reply-To: <0-v3-57c1502c62fd+2190-ccw_mdev_jgg@nvidia.com> References: X-ClientProxiedBy: BLAPR03CA0120.namprd03.prod.outlook.com (2603:10b6:208:32a::35) To BL0PR12MB5506.namprd12.prod.outlook.com (2603:10b6:208:1cb::22) MIME-Version: 1.0 Received: from mlx.ziepe.ca (142.162.113.129) by BLAPR03CA0120.namprd03.prod.outlook.com (2603:10b6:208:32a::35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4566.14 via Frontend Transport; Fri, 1 Oct 2021 17:52:53 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1mWMiK-009894-1G; Fri, 01 Oct 2021 14:52:52 -0300 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4f54df12-0501-4ed7-f9c4-08d985044b2a X-MS-TrafficTypeDiagnostic: BL1PR12MB5207: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:785; 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:BL0PR12MB5506.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(366004)(66946007)(2906002)(83380400001)(66556008)(8676002)(38100700002)(66476007)(5660300002)(2616005)(508600001)(426003)(9786002)(26005)(186003)(6666004)(9746002)(54906003)(36756003)(7416002)(4326008)(110136005)(86362001)(8936002)(921005)(316002)(4216001); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4f54df12-0501-4ed7-f9c4-08d985044b2a X-MS-Exchange-CrossTenant-AuthSource: BL0PR12MB5506.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Oct 2021 17:52:53.9018 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: aT83wcHhlLaiQc4MP99HGsApswU6MsocYsvyoThAZ4/N/UAV0SDd0zIpdcrqDGNj X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5207 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Makes the code easier to understand what is memory lifecycle and what is other stuff. Reviewed-by: Eric Farman Signed-off-by: Jason Gunthorpe Reviewed-by: Matthew Rosato --- drivers/s390/cio/vfio_ccw_drv.c | 137 ++++++++++++++++++-------------- 1 file changed, 78 insertions(+), 59 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index 371558ec92045d..e32678a71644fb 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -137,16 +137,80 @@ static void vfio_ccw_sch_irq(struct subchannel *sch) vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT); } -static void vfio_ccw_free_regions(struct vfio_ccw_private *private) +static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) { - if (private->crw_region) - kmem_cache_free(vfio_ccw_crw_region, private->crw_region); - if (private->schib_region) - kmem_cache_free(vfio_ccw_schib_region, private->schib_region); - if (private->cmd_region) - kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region); - if (private->io_region) - kmem_cache_free(vfio_ccw_io_region, private->io_region); + struct vfio_ccw_private *private; + + private = kzalloc(sizeof(*private), GFP_KERNEL); + if (!private) + return ERR_PTR(-ENOMEM); + + private->sch = sch; + mutex_init(&private->io_mutex); + private->state = VFIO_CCW_STATE_NOT_OPER; + INIT_LIST_HEAD(&private->crw); + INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo); + INIT_WORK(&private->crw_work, vfio_ccw_crw_todo); + atomic_set(&private->avail, 1); + + private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1), + GFP_KERNEL); + if (!private->cp.guest_cp) + goto out_free_private; + + private->io_region = kmem_cache_zalloc(vfio_ccw_io_region, + GFP_KERNEL | GFP_DMA); + if (!private->io_region) + goto out_free_cp; + + private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region, + GFP_KERNEL | GFP_DMA); + if (!private->cmd_region) + goto out_free_io; + + private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region, + GFP_KERNEL | GFP_DMA); + + if (!private->schib_region) + goto out_free_cmd; + + private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region, + GFP_KERNEL | GFP_DMA); + + if (!private->crw_region) + goto out_free_schib; + return private; + +out_free_schib: + kmem_cache_free(vfio_ccw_schib_region, private->schib_region); +out_free_cmd: + kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region); +out_free_io: + kmem_cache_free(vfio_ccw_io_region, private->io_region); +out_free_cp: + kfree(private->cp.guest_cp); +out_free_private: + mutex_destroy(&private->io_mutex); + kfree(private); + return ERR_PTR(-ENOMEM); +} + +static void vfio_ccw_free_private(struct vfio_ccw_private *private) +{ + struct vfio_ccw_crw *crw, *temp; + + list_for_each_entry_safe(crw, temp, &private->crw, next) { + list_del(&crw->next); + kfree(crw); + } + + kmem_cache_free(vfio_ccw_crw_region, private->crw_region); + kmem_cache_free(vfio_ccw_schib_region, private->schib_region); + kmem_cache_free(vfio_ccw_cmd_region, private->cmd_region); + kmem_cache_free(vfio_ccw_io_region, private->io_region); + kfree(private->cp.guest_cp); + mutex_destroy(&private->io_mutex); + kfree(private); } static int vfio_ccw_sch_probe(struct subchannel *sch) @@ -161,53 +225,19 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) return -ENODEV; } - private = kzalloc(sizeof(*private), GFP_KERNEL); - if (!private) - return -ENOMEM; + private = vfio_ccw_alloc_private(sch); + if (IS_ERR(private)) + return PTR_ERR(private); - private->cp.guest_cp = kcalloc(CCWCHAIN_LEN_MAX, sizeof(struct ccw1), - GFP_KERNEL); - if (!private->cp.guest_cp) - goto out_free; - - private->io_region = kmem_cache_zalloc(vfio_ccw_io_region, - GFP_KERNEL | GFP_DMA); - if (!private->io_region) - goto out_free; - - private->cmd_region = kmem_cache_zalloc(vfio_ccw_cmd_region, - GFP_KERNEL | GFP_DMA); - if (!private->cmd_region) - goto out_free; - - private->schib_region = kmem_cache_zalloc(vfio_ccw_schib_region, - GFP_KERNEL | GFP_DMA); - - if (!private->schib_region) - goto out_free; - - private->crw_region = kmem_cache_zalloc(vfio_ccw_crw_region, - GFP_KERNEL | GFP_DMA); - - if (!private->crw_region) - goto out_free; - - private->sch = sch; dev_set_drvdata(&sch->dev, private); - mutex_init(&private->io_mutex); spin_lock_irq(sch->lock); - private->state = VFIO_CCW_STATE_NOT_OPER; sch->isc = VFIO_CCW_ISC; ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); spin_unlock_irq(sch->lock); if (ret) goto out_free; - INIT_LIST_HEAD(&private->crw); - INIT_WORK(&private->io_work, vfio_ccw_sch_io_todo); - INIT_WORK(&private->crw_work, vfio_ccw_crw_todo); - atomic_set(&private->avail, 1); private->state = VFIO_CCW_STATE_STANDBY; ret = vfio_ccw_mdev_reg(sch); @@ -228,31 +258,20 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) cio_disable_subchannel(sch); out_free: dev_set_drvdata(&sch->dev, NULL); - vfio_ccw_free_regions(private); - kfree(private->cp.guest_cp); - kfree(private); + vfio_ccw_free_private(private); return ret; } static void vfio_ccw_sch_remove(struct subchannel *sch) { struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev); - struct vfio_ccw_crw *crw, *temp; vfio_ccw_sch_quiesce(sch); - - list_for_each_entry_safe(crw, temp, &private->crw, next) { - list_del(&crw->next); - kfree(crw); - } - vfio_ccw_mdev_unreg(sch); dev_set_drvdata(&sch->dev, NULL); - vfio_ccw_free_regions(private); - kfree(private->cp.guest_cp); - kfree(private); + vfio_ccw_free_private(private); VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n", sch->schid.cssid, sch->schid.ssid,