[PATCH 20/59] drm/vmwgfx/ttm: convert vram mm init to new code paths

[daniel at ffwll.ch]

On Tue, Aug 04, 2020 at 12:55:53PM +1000, Dave Airlie wrote:
> From: Dave Airlie <airlied at redhat.com>
> 
> Split out the vram thp init path vs the range manager init.
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 25 +++++++++++++++++++------
>  drivers/gpu/drm/vmwgfx/vmwgfx_drv.h |  4 +---
>  drivers/gpu/drm/vmwgfx/vmwgfx_thp.c | 12 ++++++++----
>  3 files changed, 28 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index 1e4c2c6119c3..5a889df2de03 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -620,6 +620,23 @@ static int vmw_dma_masks(struct vmw_private *dev_priv)
>  	return ret;
>  }
>  
> +static int vmw_vram_manager_init(struct vmw_private *dev_priv)
> +{
> +	int ret;
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +	ret = vmw_thp_init(dev_priv);
> +#else
> +	struct ttm_mem_type_manager *man = &dev_priv->bdev.man[TTM_PL_VRAM];
> +
> +	man->available_caching = TTM_PL_FLAG_CACHED;
> +	man->default_caching = TTM_PL_FLAG_CACHED;
> +
> +	ret = ttm_range_man_init(&dev_priv->bdev, man,
> +				 dev_priv->vram_size >> PAGE_SHIFT);
> +#endif

The ifdeffery here looks a bit funny, but not really less convoluted than
the old one I think.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> +	dev_priv->bdev.man[TTM_PL_VRAM].use_type = false;
> +	return ret;
> +}
>  static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
>  {
>  	struct vmw_private *dev_priv;
> @@ -866,16 +883,12 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
>  	 * Enable VRAM, but initially don't use it until SVGA is enabled and
>  	 * unhidden.
>  	 */
> -	dev_priv->bdev.man[TTM_PL_VRAM].func = &vmw_thp_func;
> -	dev_priv->bdev.man[TTM_PL_VRAM].available_caching = TTM_PL_FLAG_CACHED;
> -	dev_priv->bdev.man[TTM_PL_VRAM].default_caching = TTM_PL_FLAG_CACHED;
> -	ret = ttm_bo_init_mm(&dev_priv->bdev, TTM_PL_VRAM,
> -			     (dev_priv->vram_size >> PAGE_SHIFT));
> +
> +	ret = vmw_vram_manager_init(dev_priv);
>  	if (unlikely(ret != 0)) {
>  		DRM_ERROR("Failed initializing memory manager for VRAM.\n");
>  		goto out_no_vram;
>  	}
> -	dev_priv->bdev.man[TTM_PL_VRAM].use_type = false;
>  
>  	/*
>  	 * "Guest Memory Regions" is an aperture like feature with
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> index 65c414f119c0..10b681725a53 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> @@ -1520,9 +1520,7 @@ vm_fault_t vmw_bo_vm_huge_fault(struct vm_fault *vmf,
>  
>  /* Transparent hugepage support - vmwgfx_thp.c */
>  #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> -extern const struct ttm_mem_type_manager_func vmw_thp_func;
> -#else
> -#define vmw_thp_func ttm_bo_manager_func
> +extern int vmw_thp_init(struct vmw_private *dev_priv);
>  #endif
>  
>  /**
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_thp.c b/drivers/gpu/drm/vmwgfx/vmwgfx_thp.c
> index b7c816ba7166..0292c931c265 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_thp.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_thp.c
> @@ -115,18 +115,23 @@ static void vmw_thp_put_node(struct ttm_mem_type_manager *man,
>  	}
>  }
>  
> -static int vmw_thp_init(struct ttm_mem_type_manager *man,
> -			unsigned long p_size)
> +int vmw_thp_init(struct vmw_private *dev_priv)
>  {
> +	struct ttm_mem_type_manager *man = &dev_priv->bdev.man[TTM_PL_VRAM];
>  	struct vmw_thp_manager *rman;
> +	man->available_caching = TTM_PL_FLAG_CACHED;
> +	man->default_caching = TTM_PL_FLAG_CACHED;
>  
> +	ttm_mem_type_manager_init(&dev_priv->bdev, man,
> +				  dev_priv->vram_size >> PAGE_SHIFT);
>  	rman = kzalloc(sizeof(*rman), GFP_KERNEL);
>  	if (!rman)
>  		return -ENOMEM;
>  
> -	drm_mm_init(&rman->mm, 0, p_size);
> +	drm_mm_init(&rman->mm, 0, man->size);
>  	spin_lock_init(&rman->lock);
>  	man->priv = rman;
> +	ttm_mem_type_manager_set_used(man, true);
>  	return 0;
>  }
>  
> @@ -158,7 +163,6 @@ static void vmw_thp_debug(struct ttm_mem_type_manager *man,
>  }
>  
>  const struct ttm_mem_type_manager_func vmw_thp_func = {
> -	.init = vmw_thp_init,
>  	.takedown = vmw_thp_takedown,
>  	.get_node = vmw_thp_get_node,
>  	.put_node = vmw_thp_put_node,
> -- 
> 2.26.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch