linux-kernel - Re: [PATCH 2/4] drm/vmwgfx: remove CONFIG_INTEL

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Date:   Tue, 8 Jan 2019 10:03:18 +0000
From:   Thomas Hellstrom <thellstrom@...are.com>
To:     "hch@....de" <hch@....de>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Linux-graphics-maintainer <Linux-graphics-maintainer@...are.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>
Subject: Re: [PATCH 2/4] drm/vmwgfx: remove CONFIG_INTEL_IOMMU ifdefs

Reviewed-by: Thomas Hellstrom <thellstrom@...are.com>

On Sat, 2019-01-05 at 09:01 +0100, Christoph Hellwig wrote:
> intel_iommu_enabled is defined as always false for
> !CONFIG_INTEL_IOMMU,
> so remove the ifdefs around it.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 18 ------------------
>  1 file changed, 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index 69e325b2d954..236052ad233c 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -567,12 +567,10 @@ static int vmw_dma_select_mode(struct
> vmw_private *dev_priv)
>  		[vmw_dma_map_bind] = "Giving up DMA mappings early."};
>  	const struct dma_map_ops *dma_ops = get_dma_ops(dev_priv->dev-
> >dev);
>  
> -#ifdef CONFIG_INTEL_IOMMU
>  	if (intel_iommu_enabled) {
>  		dev_priv->map_mode = vmw_dma_map_populate;
>  		goto out_fixup;
>  	}
> -#endif
>  
>  	if (!(vmw_force_iommu || vmw_force_coherent)) {
>  		dev_priv->map_mode = vmw_dma_phys;
> @@ -589,9 +587,7 @@ static int vmw_dma_select_mode(struct vmw_private
> *dev_priv)
>  		dev_priv->map_mode = vmw_dma_map_populate;
>  #endif
>  
> -#ifdef CONFIG_INTEL_IOMMU
>  out_fixup:
> -#endif
>  	if (dev_priv->map_mode == vmw_dma_map_populate &&
>  	    vmw_restrict_iommu)
>  		dev_priv->map_mode = vmw_dma_map_bind;
> @@ -599,13 +595,6 @@ static int vmw_dma_select_mode(struct
> vmw_private *dev_priv)
>  	if (vmw_force_coherent)
>  		dev_priv->map_mode = vmw_dma_alloc_coherent;
>  
> -#if !defined(CONFIG_SWIOTLB) && !defined(CONFIG_INTEL_IOMMU)
> -	/*
> -	 * No coherent page pool
> -	 */
> -	if (dev_priv->map_mode == vmw_dma_alloc_coherent)
> -		return -EINVAL;
> -#endif
>  	DRM_INFO("DMA map mode: %s\n", names[dev_priv->map_mode]);
>  
>  	return 0;
> @@ -619,7 +608,6 @@ static int vmw_dma_select_mode(struct vmw_private
> *dev_priv)
>   * With 32-bit we can only handle 32 bit PFNs. Optionally set that
>   * restriction also for 64-bit systems.
>   */
> -#ifdef CONFIG_INTEL_IOMMU
>  static int vmw_dma_masks(struct vmw_private *dev_priv)
>  {
>  	struct drm_device *dev = dev_priv->dev;
> @@ -631,12 +619,6 @@ static int vmw_dma_masks(struct vmw_private
> *dev_priv)
>  	}
>  	return 0;
>  }
> -#else
> -static int vmw_dma_masks(struct vmw_private *dev_priv)
> -{
> -	return 0;
> -}
> -#endif
>  
>  static int vmw_driver_load(struct drm_device *dev, unsigned long
> chipset)
>  {