From patchwork Fri Feb 14 12:55:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11382221 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A179992A for ; Fri, 14 Feb 2020 12:56:00 +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 805CC2168B for ; Fri, 14 Feb 2020 12:56:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="b6VoO/TQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 805CC2168B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 36AB66F91F; Fri, 14 Feb 2020 12:55:55 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from us-smtp-delivery-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id A71946F914 for ; Fri, 14 Feb 2020 12:55:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581684943; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=0EViE0wdsGxj6jnigZu403igKjitlwATYN0MZ2nBE3E=; b=b6VoO/TQe6TCw7OlhqcEo2Yt+GEG6PSHFYGP3+rkyNVl7A1N9kFWAAnXIkTbZr9nrzryOT +siFTldvs1TeZvQzlzPw/DG+ezVXvmvysuP+mXkDpIhRTxvbRdbt9dx5HeGf041idl3IH8 0Ur/YY9GlWR2ANzpnXrKgiyQd6zsw38= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-112-ZJYz2DlcNketE3rccRhlcQ-1; Fri, 14 Feb 2020 07:55:41 -0500 X-MC-Unique: ZJYz2DlcNketE3rccRhlcQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AB938107B26F; Fri, 14 Feb 2020 12:55:39 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-117-39.ams2.redhat.com [10.36.117.39]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AE3960BE2; Fri, 14 Feb 2020 12:55:36 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 85187939B; Fri, 14 Feb 2020 13:55:35 +0100 (CET) From: Gerd Hoffmann To: dri-devel@lists.freedesktop.org Subject: [PATCH v4 2/6] drm/virtio: notify before waiting Date: Fri, 14 Feb 2020 13:55:31 +0100 Message-Id: <20200214125535.26349-3-kraxel@redhat.com> In-Reply-To: <20200214125535.26349-1-kraxel@redhat.com> References: <20200214125535.26349-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 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: David Airlie , open list , "open list:VIRTIO GPU DRIVER" , Gerd Hoffmann , gurchetansingh@chromium.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Before we are going to wait for virtqueue entries becoming available call virtio_gpu_notify() to make sure the host has seen everything we've submitted. Signed-off-by: Gerd Hoffmann --- drivers/gpu/drm/virtio/virtgpu_vq.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 6cc259cfa517..653efb26bcd9 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -346,6 +346,7 @@ static void virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev, if (vq->num_free < elemcnt) { spin_unlock(&vgdev->ctrlq.qlock); + virtio_gpu_notify(vgdev); wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt); goto again; }