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Date: Wed, 3 Jul 2019 12:55:36 -0700
From: Chia-I Wu <olvaffe@...il.com>
To: Gerd Hoffmann <kraxel@...hat.com>
Cc: ML dri-devel <dri-devel@...ts.freedesktop.org>,
Gurchetan Singh <gurchetansingh@...omium.org>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
"open list:VIRTIO GPU DRIVER"
<virtualization@...ts.linux-foundation.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 15/18] drm/virtio: rework virtio_gpu_transfer_to_host_ioctl
fencing
On Tue, Jul 2, 2019 at 7:19 AM Gerd Hoffmann <kraxel@...hat.com> wrote:
>
> Switch to the virtio_gpu_array_* helper workflow.
>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> ---
> drivers/gpu/drm/virtio/virtgpu_drv.h | 2 +-
> drivers/gpu/drm/virtio/virtgpu_ioctl.c | 43 ++++++++++++--------------
> drivers/gpu/drm/virtio/virtgpu_vq.c | 5 ++-
> 3 files changed, 25 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
> index 4df760ba018e..b1f63a21abb6 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_drv.h
> +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
> @@ -308,10 +308,10 @@ void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
> struct virtio_gpu_object_array *objs,
> struct virtio_gpu_fence *fence);
> void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
> - struct virtio_gpu_object *bo,
> uint32_t ctx_id,
> uint64_t offset, uint32_t level,
> struct virtio_gpu_box *box,
> + struct virtio_gpu_object_array *objs,
> struct virtio_gpu_fence *fence);
> void
> virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
> diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> index 56182abdbf36..b220918df6a1 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> @@ -341,47 +341,44 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
> struct virtio_gpu_device *vgdev = dev->dev_private;
> struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
> struct drm_virtgpu_3d_transfer_to_host *args = data;
> - struct drm_gem_object *gobj = NULL;
> - struct virtio_gpu_object *qobj = NULL;
> + struct virtio_gpu_object_array *objs;
> struct virtio_gpu_fence *fence;
> struct virtio_gpu_box box;
> int ret;
> u32 offset = args->offset;
>
> - gobj = drm_gem_object_lookup(file, args->bo_handle);
> - if (gobj == NULL)
> + objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
> + if (objs == NULL)
> return -ENOENT;
>
> - qobj = gem_to_virtio_gpu_obj(gobj);
> -
> - ret = virtio_gpu_object_reserve(qobj);
> - if (ret)
> - goto out;
> -
> convert_to_hw_box(&box, &args->box);
> if (!vgdev->has_virgl_3d) {
> virtio_gpu_cmd_transfer_to_host_2d
> - (vgdev, qobj, offset,
> + (vgdev, gem_to_virtio_gpu_obj(objs->objs[0]), offset,
> box.w, box.h, box.x, box.y, NULL);
> + virtio_gpu_array_put_free(objs);
Don't we need this in non-3D case as well?
> } else {
> + ret = virtio_gpu_array_lock_resv(objs);
> + if (ret != 0)
> + goto err_put_free;
> +
> + ret = -ENOMEM;
> fence = virtio_gpu_fence_alloc(vgdev);
> - if (!fence) {
> - ret = -ENOMEM;
> - goto out_unres;
> - }
> + if (!fence)
> + goto err_unlock;
> +
> virtio_gpu_cmd_transfer_to_host_3d
> - (vgdev, qobj,
> + (vgdev,
> vfpriv ? vfpriv->ctx_id : 0, offset,
> - args->level, &box, fence);
> - reservation_object_add_excl_fence(qobj->base.base.resv,
> - &fence->f);
> + args->level, &box, objs, fence);
> dma_fence_put(&fence->f);
> }
> + return 0;
>
> -out_unres:
> - virtio_gpu_object_unreserve(qobj);
> -out:
> - drm_gem_object_put_unlocked(gobj);
> +err_unlock:
> + virtio_gpu_array_unlock_resv(objs);
> +err_put_free:
> + virtio_gpu_array_put_free(objs);
> return ret;
> }
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
> index bef7036f4508..1c0097de419a 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_vq.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
> @@ -899,12 +899,13 @@ virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
> }
>
> void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
> - struct virtio_gpu_object *bo,
> uint32_t ctx_id,
> uint64_t offset, uint32_t level,
> struct virtio_gpu_box *box,
> + struct virtio_gpu_object_array *objs,
> struct virtio_gpu_fence *fence)
> {
> + struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]);
> struct virtio_gpu_transfer_host_3d *cmd_p;
> struct virtio_gpu_vbuffer *vbuf;
> bool use_dma_api = !virtio_has_iommu_quirk(vgdev->vdev);
> @@ -917,6 +918,8 @@ void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
> cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
> memset(cmd_p, 0, sizeof(*cmd_p));
>
> + vbuf->objs = objs;
> +
> cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D);
> cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
> cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle);
> --
> 2.18.1
>
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