[PATCH 56/59] drm/ttm: add a wrapper for checking if manager is in use

[daniel at ffwll.ch]

On Tue, Aug 04, 2020 at 12:56:29PM +1000, Dave Airlie wrote:
> From: Dave Airlie <airlied at redhat.com>
> 
> This converts vmwgfx over to using an interface to set the
> in use and check the in use flag.
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Hm, I think this would be a good candidate to eventually rip out once we
have full sub-classing, since it's for vmwgfx internally only. Maybe add a
todo to the kernel-doc.
-Daniel

> ---
>  drivers/gpu/drm/nouveau/nouveau_ttm.c |  1 -
>  drivers/gpu/drm/ttm/ttm_bo.c          |  2 +-
>  drivers/gpu/drm/vmwgfx/vmwgfx_drv.c   | 14 +++++++-------
>  include/drm/ttm/ttm_bo_driver.h       | 14 ++++++++++++++
>  4 files changed, 22 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> index 22185a8dcfa1..38a0e4bd16f7 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> @@ -240,7 +240,6 @@ nouveau_ttm_init_gtt(struct nouveau_drm *drm)
>  	ttm_mem_type_manager_init(man, size_pages);
>  	ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, man);
>  	ttm_mem_type_manager_set_used(man, true);
> -
>  	return 0;
>  }
>  
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index cda33b4af681..7d10abae9a60 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -1002,7 +1002,7 @@ static int ttm_bo_mem_placement(struct ttm_buffer_object *bo,
>  		return ret;
>  
>  	man = ttm_manager_type(bdev, mem_type);
> -	if (!man || !man->use_type)
> +	if (!man || !ttm_mem_type_manager_used(man))
>  		return -EBUSY;
>  
>  	if (!ttm_bo_mt_compatible(man, mem_type, place, &cur_flags))
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index 7168403fb4f8..b2f1e7a3b048 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -630,7 +630,7 @@ static int vmw_vram_manager_init(struct vmw_private *dev_priv)
>  				 TTM_PL_FLAG_CACHED, TTM_PL_FLAG_CACHED,
>  				 false, dev_priv->vram_size >> PAGE_SHIFT);
>  #endif
> -	ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM)->use_type = false;
> +	ttm_mem_type_manager_set_used(ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM), false);
>  	return ret;
>  }
>  
> @@ -1192,9 +1192,9 @@ static void __vmw_svga_enable(struct vmw_private *dev_priv)
>  	struct ttm_mem_type_manager *man = ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM);
>  
>  	spin_lock(&dev_priv->svga_lock);
> -	if (!man->use_type) {
> +	if (!ttm_mem_type_manager_used(man)) {
>  		vmw_write(dev_priv, SVGA_REG_ENABLE, SVGA_REG_ENABLE);
> -		man->use_type = true;
> +		ttm_mem_type_manager_set_used(man, true);
>  	}
>  	spin_unlock(&dev_priv->svga_lock);
>  }
> @@ -1223,8 +1223,8 @@ static void __vmw_svga_disable(struct vmw_private *dev_priv)
>  	struct ttm_mem_type_manager *man = ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM);
>  
>  	spin_lock(&dev_priv->svga_lock);
> -	if (man->use_type) {
> -		man->use_type = false;
> +	if (ttm_mem_type_manager_used(man)) {
> +		ttm_mem_type_manager_set_used(man, false);
>  		vmw_write(dev_priv, SVGA_REG_ENABLE,
>  			  SVGA_REG_ENABLE_HIDE |
>  			  SVGA_REG_ENABLE_ENABLE);
> @@ -1257,8 +1257,8 @@ void vmw_svga_disable(struct vmw_private *dev_priv)
>  	vmw_kms_lost_device(dev_priv->dev);
>  	ttm_write_lock(&dev_priv->reservation_sem, false);
>  	spin_lock(&dev_priv->svga_lock);
> -	if (man->use_type) {
> -		man->use_type = false;
> +	if (ttm_mem_type_manager_used(man)) {
> +		ttm_mem_type_manager_set_used(man, false);
>  		spin_unlock(&dev_priv->svga_lock);
>  		if (ttm_bo_evict_mm(&dev_priv->bdev, TTM_PL_VRAM))
>  			DRM_ERROR("Failed evicting VRAM buffers.\n");
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index 300934289e64..f231fe34e744 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -678,6 +678,20 @@ static inline void ttm_mem_type_manager_set_used(struct ttm_mem_type_manager *ma
>  	man->use_type = used;
>  }
>  
> +/**
> + * ttm_mem_type_manager_used
> + *
> + * @man: Manager to get used state for
> + *
> + * Get the in use flag for a manager.
> + * Returns:
> + * true is used, false if not.
> + */
> +static inline bool ttm_mem_type_manager_used(struct ttm_mem_type_manager *man)
> +{
> +	return man->use_type;
> +}
> +
>  /**
>   * ttm_mem_type_manager_cleanup
>   *
> -- 
> 2.26.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch