From patchwork Fri Sep 9 10:22:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tian, Kevin" X-Patchwork-Id: 12970974 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A961FECAAD5 for ; Fri, 9 Sep 2022 03:05:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EE93210E2EE; Fri, 9 Sep 2022 03:05:08 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 70B9F10EA2D; Fri, 9 Sep 2022 03:04:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662692698; x=1694228698; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eaCLetd3P35bUmOh4svxRrc/KVF//VLSz2q4OGmo054=; b=lNmiazWrD5XssoxOfwQyzkAE3lnevlFZOitVWU8tmi0xgU/r/1X7Cc0V UhWyxkiIB5PX5hFJX3lsbuMR2lRypCE0qusYWn2EfD3LbmRr64ekoNrXo ilZhxW3i2T0TouEX6zhKprKSLxWxN9sLEPRDwRn5mqJYzNSSkOoskStdO Eim0HmpnhhH8svWK7rjGAl5zAsHpj/3roxQMFkEPzzT21l43P2PCkxW3p /KLbAhfhAkbOKqqy2vYdu/qt0taqT9hCGgvONkcuJ7xSvwwVOEm4w7Prr pblcgRq95Btz72FjRlcxh+nYK3awi3/WNq34lfRss4RGNQSoZLt1USPl6 g==; X-IronPort-AV: E=McAfee;i="6500,9779,10464"; a="297382006" X-IronPort-AV: E=Sophos;i="5.93,300,1654585200"; d="scan'208";a="297382006" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Sep 2022 20:04:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,300,1654585200"; d="scan'208";a="740908911" Received: from sqa-gate.sh.intel.com (HELO michael.clx.dev.tsp.org) ([10.239.48.212]) by orsmga004.jf.intel.com with ESMTP; 08 Sep 2022 20:04:22 -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 Subject: [PATCH v3 06/15] vfio/mtty: Use the new device life cycle helpers Date: Fri, 9 Sep 2022 18:22:38 +0800 Message-Id: <20220909102247.67324-7-kevin.tian@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20220909102247.67324-1-kevin.tian@intel.com> References: <20220909102247.67324-1-kevin.tian@intel.com> MIME-Version: 1.0 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: , Cc: Yi Liu Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Yi Liu and manage available ports inside @init/@release. Signed-off-by: Yi Liu Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe --- samples/vfio-mdev/mtty.c | 67 +++++++++++++++++++++++----------------- 1 file changed, 39 insertions(+), 28 deletions(-) diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c index f42a59ed2e3f..41301d50b247 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -703,9 +703,11 @@ static ssize_t mdev_access(struct mdev_state *mdev_state, u8 *buf, size_t count, return ret; } -static int mtty_probe(struct mdev_device *mdev) +static int mtty_init_dev(struct vfio_device *vdev) { - struct mdev_state *mdev_state; + struct mdev_state *mdev_state = + container_of(vdev, struct mdev_state, vdev); + struct mdev_device *mdev = to_mdev_device(vdev->dev); int nr_ports = mdev_get_type_group_id(mdev) + 1; int avail_ports = atomic_read(&mdev_avail_ports); int ret; @@ -716,58 +718,65 @@ static int mtty_probe(struct mdev_device *mdev) } while (!atomic_try_cmpxchg(&mdev_avail_ports, &avail_ports, avail_ports - nr_ports)); - mdev_state = kzalloc(sizeof(struct mdev_state), GFP_KERNEL); - if (mdev_state == NULL) { - ret = -ENOMEM; - goto err_nr_ports; - } - - vfio_init_group_dev(&mdev_state->vdev, &mdev->dev, &mtty_dev_ops); - mdev_state->nr_ports = nr_ports; mdev_state->irq_index = -1; mdev_state->s[0].max_fifo_size = MAX_FIFO_SIZE; mdev_state->s[1].max_fifo_size = MAX_FIFO_SIZE; mutex_init(&mdev_state->rxtx_lock); - mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL); - if (mdev_state->vconfig == NULL) { + mdev_state->vconfig = kzalloc(MTTY_CONFIG_SPACE_SIZE, GFP_KERNEL); + if (!mdev_state->vconfig) { ret = -ENOMEM; - goto err_state; + goto err_nr_ports; } mutex_init(&mdev_state->ops_lock); mdev_state->mdev = mdev; - mtty_create_config_space(mdev_state); + return 0; + +err_nr_ports: + atomic_add(nr_ports, &mdev_avail_ports); + return ret; +} + +static int mtty_probe(struct mdev_device *mdev) +{ + struct mdev_state *mdev_state; + int ret; + + mdev_state = vfio_alloc_device(mdev_state, vdev, &mdev->dev, + &mtty_dev_ops); + if (IS_ERR(mdev_state)) + return PTR_ERR(mdev_state); ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev); if (ret) - goto err_vconfig; + goto err_put_vdev; dev_set_drvdata(&mdev->dev, mdev_state); return 0; -err_vconfig: - kfree(mdev_state->vconfig); -err_state: - vfio_uninit_group_dev(&mdev_state->vdev); - kfree(mdev_state); -err_nr_ports: - atomic_add(nr_ports, &mdev_avail_ports); +err_put_vdev: + vfio_put_device(&mdev_state->vdev); return ret; } +static void mtty_release_dev(struct vfio_device *vdev) +{ + struct mdev_state *mdev_state = + container_of(vdev, struct mdev_state, vdev); + + kfree(mdev_state->vconfig); + vfio_free_device(vdev); + atomic_add(mdev_state->nr_ports, &mdev_avail_ports); +} + static void mtty_remove(struct mdev_device *mdev) { struct mdev_state *mdev_state = dev_get_drvdata(&mdev->dev); - int nr_ports = mdev_state->nr_ports; vfio_unregister_group_dev(&mdev_state->vdev); - - kfree(mdev_state->vconfig); - vfio_uninit_group_dev(&mdev_state->vdev); - kfree(mdev_state); - atomic_add(nr_ports, &mdev_avail_ports); + vfio_put_device(&mdev_state->vdev); } static int mtty_reset(struct mdev_state *mdev_state) @@ -1287,6 +1296,8 @@ static struct attribute_group *mdev_type_groups[] = { static const struct vfio_device_ops mtty_dev_ops = { .name = "vfio-mtty", + .init = mtty_init_dev, + .release = mtty_release_dev, .read = mtty_read, .write = mtty_write, .ioctl = mtty_ioctl,