From patchwork Wed Dec 11 08:42:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11284443 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 85C3114E3 for ; Wed, 11 Dec 2019 08:42:34 +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 64064214AF for ; Wed, 11 Dec 2019 08:42:34 +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="Hsq64ZMl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 64064214AF 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 7301A6EA94; Wed, 11 Dec 2019 08:42:28 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1AFD06EA93 for ; Wed, 11 Dec 2019 08:42:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576053746; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Dsst+sWX0VFTEAJu3TuQCKDms+wHXt+MxKKJ0t44GQg=; b=Hsq64ZMlidk69+a6w8lru9K3iP1V1oyzGSodRVNaUzMqPYlPDRvsc6vXMJYXUlA0GcAGXU yEYC8EKOXDfuShzmxdQYhQkswTcxeMKZzqZzu91Fbc4HvArCSm3UE1KFyohaltQCMQTAX3 0p5BNMnaA5CgZzYQo/koozOwyoWTldo= 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-426-ZP_jTZwRNryhmIsXO6DjjQ-1; Wed, 11 Dec 2019 03:42:21 -0500 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 A85EA107ACCC; Wed, 11 Dec 2019 08:42:20 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-67.ams2.redhat.com [10.36.116.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id 78BD960BE1; Wed, 11 Dec 2019 08:42:17 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 904E51747D; Wed, 11 Dec 2019 09:42:16 +0100 (CET) From: Gerd Hoffmann To: dri-devel@lists.freedesktop.org Subject: [PATCH 2/3] virtio-gpu: batch display update commands. Date: Wed, 11 Dec 2019 09:42:15 +0100 Message-Id: <20191211084216.25405-3-kraxel@redhat.com> In-Reply-To: <20191211084216.25405-1-kraxel@redhat.com> References: <20191211084216.25405-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: ZP_jTZwRNryhmIsXO6DjjQ-1 X-Mimecast-Spam-Score: 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: 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" When the driver submits multiple commands in a row it makes sense to notify the host only after submitting the last one, so the host can process them all at once, with a single vmexit. Add functions to enable/disable notifications to allow that. Use the new functions for primary plane updates. Signed-off-by: Gerd Hoffmann --- drivers/gpu/drm/virtio/virtgpu_drv.h | 6 ++++++ drivers/gpu/drm/virtio/virtgpu_plane.c | 4 ++++ drivers/gpu/drm/virtio/virtgpu_vq.c | 23 +++++++++++++++++++++-- 3 files changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index eedae2a7b532..29cf005ed6b9 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -183,6 +183,9 @@ struct virtio_gpu_device { struct kmem_cache *vbufs; bool vqs_ready; + bool disable_notify; + bool pending_notify; + struct ida resource_ida; wait_queue_head_t resp_wq; @@ -335,6 +338,9 @@ void virtio_gpu_dequeue_ctrl_func(struct work_struct *work); void virtio_gpu_dequeue_cursor_func(struct work_struct *work); void virtio_gpu_dequeue_fence_func(struct work_struct *work); +void virtio_gpu_disable_notify(struct virtio_gpu_device *vgdev); +void virtio_gpu_enable_notify(struct virtio_gpu_device *vgdev); + /* virtio_gpu_display.c */ int virtio_gpu_framebuffer_init(struct drm_device *dev, struct virtio_gpu_framebuffer *vgfb, diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c index a0f91658c2bc..2e0d14e005db 100644 --- a/drivers/gpu/drm/virtio/virtgpu_plane.c +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c @@ -146,6 +146,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane, return; } + virtio_gpu_disable_notify(vgdev); + vgfb = to_virtio_gpu_framebuffer(plane->state->fb); bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); if (bo->dumb) @@ -173,6 +175,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane, plane->state->src_y >> 16, plane->state->src_w >> 16, plane->state->src_h >> 16); + + virtio_gpu_enable_notify(vgdev); } static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane, diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 9274c4063c70..5914e79d3429 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -404,8 +404,12 @@ static void virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev, } notify = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf, vout); spin_unlock(&vgdev->ctrlq.qlock); - if (notify) - virtqueue_notify(vgdev->ctrlq.vq); + if (notify) { + if (vgdev->disable_notify) + vgdev->pending_notify = true; + else + virtqueue_notify(vgdev->ctrlq.vq); + } if (sgt) { sg_free_table(sgt); @@ -413,6 +417,21 @@ static void virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev, } } +void virtio_gpu_disable_notify(struct virtio_gpu_device *vgdev) +{ + vgdev->disable_notify = true; +} + +void virtio_gpu_enable_notify(struct virtio_gpu_device *vgdev) +{ + vgdev->disable_notify = false; + + if (!vgdev->pending_notify) + return; + vgdev->pending_notify = false; + virtqueue_notify(vgdev->ctrlq.vq); +} + static void virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev, struct virtio_gpu_vbuffer *vbuf) {