From patchwork Tue Jan 31 20:52:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 13123438 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 1F057C38142 for ; Tue, 31 Jan 2023 20:55:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231817AbjAaUzT (ORCPT ); Tue, 31 Jan 2023 15:55:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54948 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231730AbjAaUzP (ORCPT ); Tue, 31 Jan 2023 15:55:15 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A32FA10A8B for ; Tue, 31 Jan 2023 12:54:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1675198466; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CiMYeklWgHsxU3YK7JpMmP4mNkC+vtmaSAHpl+MMsr0=; b=eDII7VLlPjZ40aqCKavqIf+FnsfHY34EmNtXmAEJhDC069AKMwMeshTQTGb1Adcr1lKFVR JhFfF20rRTzsTc5G7xLbLfme3FSiQZX2a9+n2u2+FHto2UuQ9QSh1VefnH4L4kPHwId+uZ 6zkJtopjuwUxN/crabfb/cRFoYRDULU= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-203-YuvJFaCbPGiUxJUXv40dRQ-1; Tue, 31 Jan 2023 15:54:23 -0500 X-MC-Unique: YuvJFaCbPGiUxJUXv40dRQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E9F161C0512A; Tue, 31 Jan 2023 20:54:21 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.39.193.239]) by smtp.corp.redhat.com (Postfix) with ESMTP id 034E740C2064; Tue, 31 Jan 2023 20:54:15 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, yi.l.liu@intel.com, yi.y.sun@intel.com, alex.williamson@redhat.com, clg@redhat.com, qemu-devel@nongnu.org Cc: david@gibson.dropbear.id.au, thuth@redhat.com, farman@linux.ibm.com, mjrosato@linux.ibm.com, akrowiak@linux.ibm.com, pasic@linux.ibm.com, jjherne@linux.ibm.com, jasowang@redhat.com, kvm@vger.kernel.org, jgg@nvidia.com, nicolinc@nvidia.com, kevin.tian@intel.com, chao.p.peng@intel.com, peterx@redhat.com, shameerali.kolothum.thodi@huawei.com, zhangfei.gao@linaro.org, berrange@redhat.com, apopple@nvidia.com, suravee.suthikulpanit@amd.com Subject: [RFC v3 10/18] vfio/ap: Use vfio_[attach/detach]_device Date: Tue, 31 Jan 2023 21:52:57 +0100 Message-Id: <20230131205305.2726330-11-eric.auger@redhat.com> In-Reply-To: <20230131205305.2726330-1-eric.auger@redhat.com> References: <20230131205305.2726330-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Let the vfio-ap device use vfio_attach_device() and vfio_detach_device(), hence hiding the details of the used IOMMU backend. Signed-off-by: Eric Auger Signed-off-by: Yi Liu --- hw/vfio/ap.c | 62 ++++++++-------------------------------------------- 1 file changed, 9 insertions(+), 53 deletions(-) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index e0dd561e85..286ac638e5 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -50,58 +50,17 @@ struct VFIODeviceOps vfio_ap_ops = { .vfio_compute_needs_reset = vfio_ap_compute_needs_reset, }; -static void vfio_ap_put_device(VFIOAPDevice *vapdev) -{ - g_free(vapdev->vdev.name); - vfio_put_base_device(&vapdev->vdev); -} - -static VFIOGroup *vfio_ap_get_group(VFIOAPDevice *vapdev, Error **errp) -{ - GError *gerror = NULL; - char *symlink, *group_path; - int groupid; - - symlink = g_strdup_printf("%s/iommu_group", vapdev->vdev.sysfsdev); - group_path = g_file_read_link(symlink, &gerror); - g_free(symlink); - - if (!group_path) { - error_setg(errp, "%s: no iommu_group found for %s: %s", - TYPE_VFIO_AP_DEVICE, vapdev->vdev.sysfsdev, gerror->message); - g_error_free(gerror); - return NULL; - } - - if (sscanf(basename(group_path), "%d", &groupid) != 1) { - error_setg(errp, "vfio: failed to read %s", group_path); - g_free(group_path); - return NULL; - } - - g_free(group_path); - - return vfio_get_group(groupid, &address_space_memory, errp); -} - static void vfio_ap_realize(DeviceState *dev, Error **errp) { - int ret; - char *mdevid; - VFIOGroup *vfio_group; APDevice *apdev = AP_DEVICE(dev); VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev); + VFIODevice *vbasedev = &vapdev->vdev; + int ret; - vfio_group = vfio_ap_get_group(vapdev, errp); - if (!vfio_group) { - return; - } - - vapdev->vdev.ops = &vfio_ap_ops; - vapdev->vdev.type = VFIO_DEVICE_TYPE_AP; - mdevid = basename(vapdev->vdev.sysfsdev); - vapdev->vdev.name = g_strdup_printf("%s", mdevid); - vapdev->vdev.dev = dev; + vbasedev->name = g_path_get_basename(vbasedev->sysfsdev); + vbasedev->ops = &vfio_ap_ops; + vbasedev->type = VFIO_DEVICE_TYPE_AP; + vbasedev->dev = dev; /* * vfio-ap devices operate in a way compatible with discarding of @@ -111,7 +70,7 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp) */ vapdev->vdev.ram_block_discard_allowed = true; - ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, errp); + ret = vfio_attach_device(vbasedev, &address_space_memory, errp); if (ret) { goto out_get_dev_err; } @@ -119,18 +78,15 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp) return; out_get_dev_err: - vfio_ap_put_device(vapdev); - vfio_put_group(vfio_group); + vfio_detach_device(vbasedev); } static void vfio_ap_unrealize(DeviceState *dev) { APDevice *apdev = AP_DEVICE(dev); VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev); - VFIOGroup *group = vapdev->vdev.group; - vfio_ap_put_device(vapdev); - vfio_put_group(group); + vfio_detach_device(&vapdev->vdev); } static Property vfio_ap_properties[] = {