From patchwork Wed Sep 21 10:43:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tian, Kevin" X-Patchwork-Id: 12983138 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2623EC6FA8B for ; Wed, 21 Sep 2022 03:28:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231308AbiIUD2T (ORCPT ); Tue, 20 Sep 2022 23:28:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231281AbiIUD1i (ORCPT ); Tue, 20 Sep 2022 23:27:38 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30948796A7; Tue, 20 Sep 2022 20:27:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663730857; x=1695266857; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=B6KCuKXzBeZe6OvWGgPHzWOHrAzPHxMmmQYQw0sU8zU=; b=HqO1RnoUTqvm4GaBoKc2lRdozmu9mDTlB7yl9uSMY+m/N6vtGEDpGijl QHuaqRGLGxGzP5eEj1EXcqZy8Vws0q9eA5vjCxnNiRqUonM1CPGfepZRh 7vc6bScd095/8+TYXyYle6bCfb1NUgQPsd/ucfiz1Jkq5ArdKshpN6IQf pW7VReYjtEBeRs41K8wxnETrTo7NHKGK0Kwnv4QGDG5m40TtT26vYR+1i N51TjqA7o5jkzUt5fuiTdORX5ngXwTFSuh7GBoAU3b+bRagBzivmK3Px5 1TDjTnLwhx3aIuIOZ3Uvbp6oEB7ViAccAftV6JbAK6jM1x6dFTju8TyYV g==; X-IronPort-AV: E=McAfee;i="6500,9779,10476"; a="279612635" X-IronPort-AV: E=Sophos;i="5.93,332,1654585200"; d="scan'208";a="279612635" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Sep 2022 20:27:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,332,1654585200"; d="scan'208";a="761574371" Received: from sqa-gate.sh.intel.com (HELO michael.clx.dev.tsp.org) ([10.239.48.212]) by fmsmga001.fm.intel.com with ESMTP; 20 Sep 2022 20:27:28 -0700 From: Kevin Tian To: Zhenyu Wang , Zhi Wang , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , Eric Farman , Matthew Rosato , Halil Pasic , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Tony Krowiak , Jason Herne , Harald Freudenberger , Diana Craciun , Alex Williamson , Cornelia Huck , Longfang Liu , Shameer Kolothum , Jason Gunthorpe , Yishai Hadas , Kevin Tian , Eric Auger , Kirti Wankhede , Leon Romanovsky , Abhishek Sahu , Christoph Hellwig , intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org Cc: Yi Liu Subject: [PATCH v4 09/15] vfio/ap: Use the new device life cycle helpers Date: Wed, 21 Sep 2022 18:43:55 +0800 Message-Id: <20220921104401.38898-10-kevin.tian@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20220921104401.38898-1-kevin.tian@intel.com> References: <20220921104401.38898-1-kevin.tian@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Yi Liu and manage available_instances inside @init/@release. Signed-off-by: Yi Liu Signed-off-by: Kevin Tian Reviewed-by: Tony Krowiak Reviewed-by: Jason Gunthorpe --- drivers/s390/crypto/vfio_ap_ops.c | 50 ++++++++++++++++++------------- 1 file changed, 29 insertions(+), 21 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 6c8c41fac4e1..161597357a64 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -684,42 +684,44 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm, AP_DOMAINS); } -static int vfio_ap_mdev_probe(struct mdev_device *mdev) +static int vfio_ap_mdev_init_dev(struct vfio_device *vdev) { - struct ap_matrix_mdev *matrix_mdev; - int ret; + struct ap_matrix_mdev *matrix_mdev = + container_of(vdev, struct ap_matrix_mdev, vdev); if ((atomic_dec_if_positive(&matrix_dev->available_instances) < 0)) return -EPERM; - matrix_mdev = kzalloc(sizeof(*matrix_mdev), GFP_KERNEL); - if (!matrix_mdev) { - ret = -ENOMEM; - goto err_dec_available; - } - vfio_init_group_dev(&matrix_mdev->vdev, &mdev->dev, - &vfio_ap_matrix_dev_ops); - - matrix_mdev->mdev = mdev; + matrix_mdev->mdev = to_mdev_device(vdev->dev); vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->matrix); matrix_mdev->pqap_hook = handle_pqap; vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb); hash_init(matrix_mdev->qtable.queues); + return 0; +} + +static int vfio_ap_mdev_probe(struct mdev_device *mdev) +{ + struct ap_matrix_mdev *matrix_mdev; + int ret; + + matrix_mdev = vfio_alloc_device(ap_matrix_mdev, vdev, &mdev->dev, + &vfio_ap_matrix_dev_ops); + if (IS_ERR(matrix_mdev)) + return PTR_ERR(matrix_mdev); + ret = vfio_register_emulated_iommu_dev(&matrix_mdev->vdev); if (ret) - goto err_list; + goto err_put_vdev; dev_set_drvdata(&mdev->dev, matrix_mdev); mutex_lock(&matrix_dev->mdevs_lock); list_add(&matrix_mdev->node, &matrix_dev->mdev_list); mutex_unlock(&matrix_dev->mdevs_lock); return 0; -err_list: - vfio_uninit_group_dev(&matrix_mdev->vdev); - kfree(matrix_mdev); -err_dec_available: - atomic_inc(&matrix_dev->available_instances); +err_put_vdev: + vfio_put_device(&matrix_mdev->vdev); return ret; } @@ -766,6 +768,12 @@ static void vfio_ap_mdev_unlink_fr_queues(struct ap_matrix_mdev *matrix_mdev) } } +static void vfio_ap_mdev_release_dev(struct vfio_device *vdev) +{ + atomic_inc(&matrix_dev->available_instances); + vfio_free_device(vdev); +} + static void vfio_ap_mdev_remove(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(&mdev->dev); @@ -779,9 +787,7 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev) list_del(&matrix_mdev->node); mutex_unlock(&matrix_dev->mdevs_lock); mutex_unlock(&matrix_dev->guests_lock); - vfio_uninit_group_dev(&matrix_mdev->vdev); - kfree(matrix_mdev); - atomic_inc(&matrix_dev->available_instances); + vfio_put_device(&matrix_mdev->vdev); } static ssize_t name_show(struct mdev_type *mtype, @@ -1794,6 +1800,8 @@ static const struct attribute_group vfio_queue_attr_group = { }; static const struct vfio_device_ops vfio_ap_matrix_dev_ops = { + .init = vfio_ap_mdev_init_dev, + .release = vfio_ap_mdev_release_dev, .open_device = vfio_ap_mdev_open_device, .close_device = vfio_ap_mdev_close_device, .ioctl = vfio_ap_mdev_ioctl,