From patchwork Thu Sep 1 14:37:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tian, Kevin" X-Patchwork-Id: 12961923 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 124E7ECAAD1 for ; Thu, 1 Sep 2022 07:20:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233853AbiIAHUo (ORCPT ); Thu, 1 Sep 2022 03:20:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233805AbiIAHUU (ORCPT ); Thu, 1 Sep 2022 03:20:20 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BF811275C3; Thu, 1 Sep 2022 00:19:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662016765; x=1693552765; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Y8UmmBQplkA+grGwnFvCLS61cwGexzv0Gp67QkSf670=; b=Ut9E91IQCsjknzwEaxwJVWXOReePd1Ac0mtMrhU0BsOX/722YiiAAEeF ztkWZlSEwyzf5MZamVv/zhvs5LQ9KVwa8YGqIlRUIy52bWKM8K3VKSPA/ aSm6018vdsMT8A4ExVhpv74hNIrbbONIQcx/XESRGuSEaqVWrBj1BV/J0 MWv0uJClFdKs2GyfOuOtJGxfj36EFtLfwV3CBSJUFLehXCTxYEI7rhuDy lFdXps7xkhXId2g/0MigTF/NM+qR9dasNMd0L3MuQE3vdcmLhk3kdxHp8 8LRY1JvkU8uxIM/kyMtdFpwR7oO+C/E+l5rFkDyBQWUY+hPdhxb2Ikm/g g==; X-IronPort-AV: E=McAfee;i="6500,9779,10456"; a="282615477" X-IronPort-AV: E=Sophos;i="5.93,280,1654585200"; d="scan'208";a="282615477" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2022 00:19:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,280,1654585200"; d="scan'208";a="673720484" Received: from sqa-gate.sh.intel.com (HELO michael.clx.dev.tsp.org) ([10.239.48.212]) by fmsmga008.fm.intel.com with ESMTP; 01 Sep 2022 00:18:59 -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 , 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 v2 10/15] vfio/fsl-mc: Use the new device life cycle helpers Date: Thu, 1 Sep 2022 22:37:42 +0800 Message-Id: <20220901143747.32858-11-kevin.tian@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20220901143747.32858-1-kevin.tian@intel.com> References: <20220901143747.32858-1-kevin.tian@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Yi Liu Also add a comment to mark that vfio core releases device_set if @init fails. Signed-off-by: Yi Liu Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe --- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 85 ++++++++++++++++++------------- 1 file changed, 49 insertions(+), 36 deletions(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index 3feff729f3ce..b6a985b07419 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -418,16 +418,7 @@ static int vfio_fsl_mc_mmap(struct vfio_device *core_vdev, return vfio_fsl_mc_mmap_mmio(vdev->regions[index], vma); } -static const struct vfio_device_ops vfio_fsl_mc_ops = { - .name = "vfio-fsl-mc", - .open_device = vfio_fsl_mc_open_device, - .close_device = vfio_fsl_mc_close_device, - .ioctl = vfio_fsl_mc_ioctl, - .read = vfio_fsl_mc_read, - .write = vfio_fsl_mc_write, - .mmap = vfio_fsl_mc_mmap, -}; - +static const struct vfio_device_ops vfio_fsl_mc_ops; static int vfio_fsl_mc_bus_notifier(struct notifier_block *nb, unsigned long action, void *data) { @@ -518,35 +509,43 @@ static void vfio_fsl_uninit_device(struct vfio_fsl_mc_device *vdev) bus_unregister_notifier(&fsl_mc_bus_type, &vdev->nb); } -static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev) +static int vfio_fsl_mc_init_dev(struct vfio_device *core_vdev) { - struct vfio_fsl_mc_device *vdev; - struct device *dev = &mc_dev->dev; + struct vfio_fsl_mc_device *vdev = + container_of(core_vdev, struct vfio_fsl_mc_device, vdev); + struct fsl_mc_device *mc_dev = to_fsl_mc_device(core_vdev->dev); int ret; - vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); - if (!vdev) - return -ENOMEM; - - vfio_init_group_dev(&vdev->vdev, dev, &vfio_fsl_mc_ops); vdev->mc_dev = mc_dev; mutex_init(&vdev->igate); if (is_fsl_mc_bus_dprc(mc_dev)) - ret = vfio_assign_device_set(&vdev->vdev, &mc_dev->dev); + ret = vfio_assign_device_set(core_vdev, &mc_dev->dev); else - ret = vfio_assign_device_set(&vdev->vdev, mc_dev->dev.parent); - if (ret) - goto out_uninit; + ret = vfio_assign_device_set(core_vdev, mc_dev->dev.parent); - ret = vfio_fsl_mc_init_device(vdev); if (ret) - goto out_uninit; + return ret; + + /* device_set is released by vfio core if @init fails */ + return vfio_fsl_mc_init_device(vdev); +} + +static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev) +{ + struct vfio_fsl_mc_device *vdev; + struct device *dev = &mc_dev->dev; + int ret; + + vdev = vfio_alloc_device(vfio_fsl_mc_device, vdev, dev, + &vfio_fsl_mc_ops); + if (IS_ERR(vdev)) + return PTR_ERR(vdev); ret = vfio_register_group_dev(&vdev->vdev); if (ret) { dev_err(dev, "VFIO_FSL_MC: Failed to add to vfio group\n"); - goto out_device; + goto out_put_vdev; } ret = vfio_fsl_mc_scan_container(mc_dev); @@ -557,30 +556,44 @@ static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev) out_group_dev: vfio_unregister_group_dev(&vdev->vdev); -out_device: - vfio_fsl_uninit_device(vdev); -out_uninit: - vfio_uninit_group_dev(&vdev->vdev); - kfree(vdev); +out_put_vdev: + vfio_put_device(&vdev->vdev); return ret; } +static void vfio_fsl_mc_release_dev(struct vfio_device *core_vdev) +{ + struct vfio_fsl_mc_device *vdev = + container_of(core_vdev, struct vfio_fsl_mc_device, vdev); + + vfio_fsl_uninit_device(vdev); + mutex_destroy(&vdev->igate); + vfio_free_device(core_vdev); +} + static int vfio_fsl_mc_remove(struct fsl_mc_device *mc_dev) { struct device *dev = &mc_dev->dev; struct vfio_fsl_mc_device *vdev = dev_get_drvdata(dev); vfio_unregister_group_dev(&vdev->vdev); - mutex_destroy(&vdev->igate); - dprc_remove_devices(mc_dev, NULL, 0); - vfio_fsl_uninit_device(vdev); - - vfio_uninit_group_dev(&vdev->vdev); - kfree(vdev); + vfio_put_device(&vdev->vdev); return 0; } +static const struct vfio_device_ops vfio_fsl_mc_ops = { + .name = "vfio-fsl-mc", + .init = vfio_fsl_mc_init_dev, + .release = vfio_fsl_mc_release_dev, + .open_device = vfio_fsl_mc_open_device, + .close_device = vfio_fsl_mc_close_device, + .ioctl = vfio_fsl_mc_ioctl, + .read = vfio_fsl_mc_read, + .write = vfio_fsl_mc_write, + .mmap = vfio_fsl_mc_mmap, +}; + static struct fsl_mc_driver vfio_fsl_mc_driver = { .probe = vfio_fsl_mc_probe, .remove = vfio_fsl_mc_remove,