[RFC 2/2] drm/msm: Add memory stats to fdinfo

[Emil Velikov]

On Thu, 6 Apr 2023 at 22:59, Rob Clark <robdclark at gmail.com> wrote:
>
> From: Rob Clark <robdclark at chromium.org>
>
> Use the new helper to export stats about memory usage.
>
> Signed-off-by: Rob Clark <robdclark at chromium.org>
> ---
>  drivers/gpu/drm/msm/msm_drv.c | 26 +++++++++++++++++++++++++-
>  drivers/gpu/drm/msm/msm_gpu.c |  2 --
>  2 files changed, 25 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 9b6f17b1261f..385776f6a531 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -1043,17 +1043,40 @@ static const struct drm_ioctl_desc msm_ioctls[] = {
>         DRM_IOCTL_DEF_DRV(MSM_SUBMITQUEUE_QUERY, msm_ioctl_submitqueue_query, DRM_RENDER_ALLOW),
>  };
>
> +enum drm_gem_object_status gem_status(struct drm_gem_object *obj)
> +{
> +       struct msm_gem_object *msm_obj = to_msm_bo(obj);
> +       enum drm_gem_object_status status = 0;
> +
> +       if (!dma_resv_test_signaled(obj->resv, dma_resv_usage_rw(true)))
> +               status |= DRM_GEM_OBJECT_ACTIVE;
> +
> +       if (msm_obj->pages)
> +               status |= DRM_GEM_OBJECT_RESIDENT;
> +
> +       if (msm_obj->madv == MSM_MADV_DONTNEED)
> +               status |= DRM_GEM_OBJECT_PURGEABLE;
> +
> +       return status;
> +}
> +
>  static void msm_fop_show_fdinfo(struct seq_file *m, struct file *f)
>  {
>         struct drm_file *file = f->private_data;
>         struct drm_device *dev = file->minor->dev;
>         struct msm_drm_private *priv = dev->dev_private;
> +       struct msm_file_private *ctx = file->driver_priv;
>         struct drm_printer p = drm_seq_file_printer(m);
>
>         if (!priv->gpu)
>                 return;
>
> -       msm_gpu_show_fdinfo(priv->gpu, file->driver_priv, &p);
> +       drm_printf(&p, "drm-driver:\t%s\n", dev->driver->name);
> +       drm_printf(&p, "drm-client-id:\t%u\n", ctx->seqno);
> +
> +       msm_gpu_show_fdinfo(priv->gpu, ctx, &p);
> +
> +       drm_print_memory_stats(file, &p, gem_status);
>  }
>
>  static const struct file_operations fops = {
> @@ -1067,6 +1090,7 @@ static const struct drm_driver msm_driver = {
>                                 DRIVER_RENDER |
>                                 DRIVER_ATOMIC |
>                                 DRIVER_MODESET |
> +                               DRIVER_SYNCOBJ_TIMELINE |

This line should probably be its own patch. AFAICT it was supported
since ab723b7a992a19b843f798b183f53f7472f598c8, although explicitly
kept disabled until there's userspace/turnip support.

With the above line removed, the patch is:
Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>

HTH
Emil