From nobody Fri Sep 19 02:32:30 2025 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 20166C46467 for ; Tue, 29 Nov 2022 17:43:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235999AbiK2Rno (ORCPT ); Tue, 29 Nov 2022 12:43:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233312AbiK2Rnl (ORCPT ); Tue, 29 Nov 2022 12:43:41 -0500 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7CE55E3C4 for ; Tue, 29 Nov 2022 09:43:39 -0800 (PST) Received: by mail-pl1-x62a.google.com with SMTP id y17so6246607plp.3 for ; Tue, 29 Nov 2022 09:43:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=iXCWILef2PDcL9sLeguo1E8rwfZJ6oNabKhO5H8Gxiw=; b=ZjD8MZVqQwGAMlT9t2izaMXVJU8jMqvIKuBePdb/fltwaex9aK3k0K8d5CtmYAz0oZ Gd4jdz46JxqNygZsNz6S4b+QNLWJye/YbdS0LdoNT8mqHc1Nfrum+jrRPAx5EIqux9IG Pc0zyGudAO5hqgWlNNl9liAX3ezO7n3sVyZn8OubwAHBVY/zjwi7+d+l9akgFsHSKrxl TKW7OZ1VTC05I96JDWw5aNhktRLGiDUci7iS/qPAwwJqoI8odrJQxdry9ItLS98eUfI5 AmORBuSvMHZGSR6s67R/CqdEg+nXn2EJPRgmCMWl6tjFhqN6Bxg7Doz/yJAVbVcoSnMT d8pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=iXCWILef2PDcL9sLeguo1E8rwfZJ6oNabKhO5H8Gxiw=; b=gPuCHgLuqqlISTBbjYWqCoR/jtue0VFepwb/XYkFV+ubTtFpb8kc54o7BcJ6x7q9+Q lBCYmcGR2QMyJYIzCdGORTQDLCqS+c6wvSBs2HdIa+dxJiQ38vGI/f+mnfS1RixxsAnX kCslZb+Ar3UhdoARzDsm0zI4ZDLA28AzGE+lA7ExZtBXKu+6UtlY08Zi7zvP8exGJzuV UjOjQCEY3WW1iOgfFmcer8f/Yo4eyvDPeWNYNuI+UqutWTK+r+dPBBpW02NYqhz32tDp dxLjZHlq6caPM76RBlDTRk9Wuq9z1uUzSxgaT5ERXcYdxgOSPq3rvPHpfEDIrh+9ASPG zPDg== X-Gm-Message-State: ANoB5pl8h1q7iGeByHFMDcci8Tcm2xCfeoT0GBBBiDVmD1lgDmjcIz4m TNN5LTUlvYu4mcQS3AyDQUA= X-Google-Smtp-Source: AA0mqf7+2AEstG2zQZWqQIE3UtBcDlP+tNxEcHG7VqwJTz3I0h+3H54yM8gaQDgA2qDzQbmuZ1wi+g== X-Received: by 2002:a17:90b:2690:b0:213:f2c9:ce71 with SMTP id pl16-20020a17090b269000b00213f2c9ce71mr60558650pjb.62.1669743819324; Tue, 29 Nov 2022 09:43:39 -0800 (PST) Received: from localhost ([2a00:79e1:abd:4a00:2703:3c72:eb1a:cffd]) by smtp.gmail.com with ESMTPSA id x29-20020aa78f1d000000b00575a578a717sm1522947pfr.206.2022.11.29.09.43.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Nov 2022 09:43:38 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: Dmitry Osipenko , Rob Clark , David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , virtualization@lists.linux-foundation.org (open list:VIRTIO GPU DRIVER), linux-kernel@vger.kernel.org (open list) Subject: [PATCH] drm/virtio: Spiff out cmd queue/response traces Date: Tue, 29 Nov 2022 09:43:30 -0800 Message-Id: <20221129174330.262751-1-robdclark@gmail.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Rob Clark Add a sequence # for more easily matching up cmd/resp, and the # of free slots in the virtqueue to more easily see starvation issues. Signed-off-by: Rob Clark Reviewed-by: Dmitry Osipenko --- drivers/gpu/drm/virtio/virtgpu_drv.h | 3 +++ drivers/gpu/drm/virtio/virtgpu_trace.h | 20 ++++++++++++-------- drivers/gpu/drm/virtio/virtgpu_vq.c | 13 ++++++++++--- 3 files changed, 25 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/= virtgpu_drv.h index 9b98470593b0..cdc208d9238c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -166,6 +166,8 @@ struct virtio_gpu_vbuffer { =20 struct virtio_gpu_object_array *objs; struct list_head list; + + uint32_t seqno; }; =20 struct virtio_gpu_output { @@ -195,6 +197,7 @@ struct virtio_gpu_queue { spinlock_t qlock; wait_queue_head_t ack_queue; struct work_struct dequeue_work; + uint32_t seqno; }; =20 struct virtio_gpu_drv_capset { diff --git a/drivers/gpu/drm/virtio/virtgpu_trace.h b/drivers/gpu/drm/virti= o/virtgpu_trace.h index 711ecc2bd241..087e860a66f7 100644 --- a/drivers/gpu/drm/virtio/virtgpu_trace.h +++ b/drivers/gpu/drm/virtio/virtgpu_trace.h @@ -9,8 +9,8 @@ #define TRACE_INCLUDE_FILE virtgpu_trace =20 DECLARE_EVENT_CLASS(virtio_gpu_cmd, - TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr), - TP_ARGS(vq, hdr), + TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr, u32 seqno= ), + TP_ARGS(vq, hdr, seqno), TP_STRUCT__entry( __field(int, dev) __field(unsigned int, vq) @@ -19,6 +19,8 @@ DECLARE_EVENT_CLASS(virtio_gpu_cmd, __field(u32, flags) __field(u64, fence_id) __field(u32, ctx_id) + __field(u32, num_free) + __field(u32, seqno) ), TP_fast_assign( __entry->dev =3D vq->vdev->index; @@ -28,21 +30,23 @@ DECLARE_EVENT_CLASS(virtio_gpu_cmd, __entry->flags =3D le32_to_cpu(hdr->flags); __entry->fence_id =3D le64_to_cpu(hdr->fence_id); __entry->ctx_id =3D le32_to_cpu(hdr->ctx_id); + __entry->num_free =3D vq->num_free; + __entry->seqno =3D seqno; ), - TP_printk("vdev=3D%d vq=3D%u name=3D%s type=3D0x%x flags=3D0x%x fence_id= =3D%llu ctx_id=3D%u", + TP_printk("vdev=3D%d vq=3D%u name=3D%s type=3D0x%x flags=3D0x%x fence_id= =3D%llu ctx_id=3D%u num_free=3D%u seqno=3D%u", __entry->dev, __entry->vq, __entry->name, __entry->type, __entry->flags, __entry->fence_id, - __entry->ctx_id) + __entry->ctx_id, __entry->num_free, __entry->seqno) ); =20 DEFINE_EVENT(virtio_gpu_cmd, virtio_gpu_cmd_queue, - TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr), - TP_ARGS(vq, hdr) + TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr, u32 seqno= ), + TP_ARGS(vq, hdr, seqno) ); =20 DEFINE_EVENT(virtio_gpu_cmd, virtio_gpu_cmd_response, - TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr), - TP_ARGS(vq, hdr) + TP_PROTO(struct virtqueue *vq, struct virtio_gpu_ctrl_hdr *hdr, u32 seqno= ), + TP_ARGS(vq, hdr, seqno) ); =20 #endif diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/v= irtgpu_vq.c index 9ff8660b50ad..a04a9b20896d 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -215,7 +215,7 @@ void virtio_gpu_dequeue_ctrl_func(struct work_struct *w= ork) list_for_each_entry(entry, &reclaim_list, list) { resp =3D (struct virtio_gpu_ctrl_hdr *)entry->resp_buf; =20 - trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp); + trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp, entry->seqno); =20 if (resp->type !=3D cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA)) { if (le32_to_cpu(resp->type) >=3D VIRTIO_GPU_RESP_ERR_UNSPEC) { @@ -261,6 +261,10 @@ void virtio_gpu_dequeue_cursor_func(struct work_struct= *work) spin_unlock(&vgdev->cursorq.qlock); =20 list_for_each_entry_safe(entry, tmp, &reclaim_list, list) { + struct virtio_gpu_ctrl_hdr *resp =3D + (struct virtio_gpu_ctrl_hdr *)entry->resp_buf; + + trace_virtio_gpu_cmd_response(vgdev->cursorq.vq, resp, entry->seqno); list_del(&entry->list); free_vbuf(vgdev, entry); } @@ -353,7 +357,8 @@ static int virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_= device *vgdev, ret =3D virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC); WARN_ON(ret); =20 - trace_virtio_gpu_cmd_queue(vq, virtio_gpu_vbuf_ctrl_hdr(vbuf)); + vbuf->seqno =3D ++vgdev->ctrlq.seqno; + trace_virtio_gpu_cmd_queue(vq, virtio_gpu_vbuf_ctrl_hdr(vbuf), vbuf->seqn= o); =20 atomic_inc(&vgdev->pending_commands); =20 @@ -465,8 +470,10 @@ static void virtio_gpu_queue_cursor(struct virtio_gpu_= device *vgdev, spin_lock(&vgdev->cursorq.qlock); goto retry; } else { + vbuf->seqno =3D ++vgdev->cursorq.seqno; trace_virtio_gpu_cmd_queue(vq, - virtio_gpu_vbuf_ctrl_hdr(vbuf)); + virtio_gpu_vbuf_ctrl_hdr(vbuf), + vbuf->seqno); =20 notify =3D virtqueue_kick_prepare(vq); } --=20 2.38.1