From: Rob Clark <robdclark@xxxxxxxxxxxx> Add a sequence # for more easily matching up cmd/resp, and the # of free slots in the virtqueue to more easily see starvation issues. v2: Fix handling of string fields as well Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx> Reviewed-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx> --- drivers/gpu/drm/virtio/virtgpu_drv.h | 3 +++ drivers/gpu/drm/virtio/virtgpu_trace.h | 26 +++++++++++++++----------- drivers/gpu/drm/virtio/virtgpu_vq.c | 13 ++++++++++--- 3 files changed, 28 insertions(+), 14 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 { struct virtio_gpu_object_array *objs; struct list_head list; + + uint32_t seqno; }; 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; }; struct virtio_gpu_drv_capset { diff --git a/drivers/gpu/drm/virtio/virtgpu_trace.h b/drivers/gpu/drm/virtio/virtgpu_trace.h index 711ecc2bd241..031bc77689d5 100644 --- a/drivers/gpu/drm/virtio/virtgpu_trace.h +++ b/drivers/gpu/drm/virtio/virtgpu_trace.h @@ -9,40 +9,44 @@ #define TRACE_INCLUDE_FILE virtgpu_trace 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) - __field(const char *, name) + __string(name, vq->name) __field(u32, type) __field(u32, flags) __field(u64, fence_id) __field(u32, ctx_id) + __field(u32, num_free) + __field(u32, seqno) ), TP_fast_assign( __entry->dev = vq->vdev->index; __entry->vq = vq->index; - __entry->name = vq->name; + __assign_str(name, vq->name); __entry->type = le32_to_cpu(hdr->type); __entry->flags = le32_to_cpu(hdr->flags); __entry->fence_id = le64_to_cpu(hdr->fence_id); __entry->ctx_id = le32_to_cpu(hdr->ctx_id); + __entry->num_free = vq->num_free; + __entry->seqno = seqno; ), - TP_printk("vdev=%d vq=%u name=%s type=0x%x flags=0x%x fence_id=%llu ctx_id=%u", - __entry->dev, __entry->vq, __entry->name, + TP_printk("vdev=%d vq=%u name=%s type=0x%x flags=0x%x fence_id=%llu ctx_id=%u num_free=%u seqno=%u", + __entry->dev, __entry->vq, __get_str(name), __entry->type, __entry->flags, __entry->fence_id, - __entry->ctx_id) + __entry->ctx_id, __entry->num_free, __entry->seqno) ); 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) ); 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) ); #endif diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_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 *work) list_for_each_entry(entry, &reclaim_list, list) { resp = (struct virtio_gpu_ctrl_hdr *)entry->resp_buf; - trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp); + trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp, entry->seqno); if (resp->type != cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA)) { if (le32_to_cpu(resp->type) >= VIRTIO_GPU_RESP_ERR_UNSPEC) { @@ -261,6 +261,10 @@ void virtio_gpu_dequeue_cursor_func(struct work_struct *work) spin_unlock(&vgdev->cursorq.qlock); list_for_each_entry_safe(entry, tmp, &reclaim_list, list) { + struct virtio_gpu_ctrl_hdr *resp = + (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 = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC); WARN_ON(ret); - trace_virtio_gpu_cmd_queue(vq, virtio_gpu_vbuf_ctrl_hdr(vbuf)); + vbuf->seqno = ++vgdev->ctrlq.seqno; + trace_virtio_gpu_cmd_queue(vq, virtio_gpu_vbuf_ctrl_hdr(vbuf), vbuf->seqno); atomic_inc(&vgdev->pending_commands); @@ -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 = ++vgdev->cursorq.seqno; trace_virtio_gpu_cmd_queue(vq, - virtio_gpu_vbuf_ctrl_hdr(vbuf)); + virtio_gpu_vbuf_ctrl_hdr(vbuf), + vbuf->seqno); notify = virtqueue_kick_prepare(vq); } -- 2.38.1