Re: [PATCH 17/17] drm/i915: Move i915_get_ggtt_vma_pages into ggtt_bind_vma

[Mika Kuoppala <mika.kuoppala@linux.intel.com>]

Daniel Vetter <daniel.vetter@ffwll.ch> writes:

> We have this neat abstraction between ppgtt and ggtt for (un)bind_vma
> and didn't end up using it really. What a shame, so fix this and make
> the ->bind_vma hook a bit more useful.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

This one I had problems with applying. But it looks simple enough.

Patches 13-17,
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>

With 12/17 I don't yet understand all the implications so I left
that out.

-Mika


> ---
>  drivers/gpu/drm/i915/i915_gem_gtt.c | 41 ++++++++++++++++++++++---------------
>  drivers/gpu/drm/i915/i915_gem_gtt.h |  6 +++---
>  2 files changed, 27 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 458819b99a0b..763c17dd2118 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -92,6 +92,9 @@
>   *
>   */
>  
> +static int
> +i915_get_ggtt_vma_pages(struct i915_vma *vma);
> +
>  const struct i915_ggtt_view i915_ggtt_view_normal;
>  const struct i915_ggtt_view i915_ggtt_view_rotated = {
>          .type = I915_GGTT_VIEW_ROTATED
> @@ -143,9 +146,9 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
>  		return has_aliasing_ppgtt ? 1 : 0;
>  }
>  
> -static void ppgtt_bind_vma(struct i915_vma *vma,
> -			   enum i915_cache_level cache_level,
> -			   u32 unused)
> +static int ppgtt_bind_vma(struct i915_vma *vma,
> +			  enum i915_cache_level cache_level,
> +			  u32 unused)
>  {
>  	u32 pte_flags = 0;
>  
> @@ -155,6 +158,8 @@ static void ppgtt_bind_vma(struct i915_vma *vma,
>  
>  	vma->vm->insert_entries(vma->vm, vma->obj->pages, vma->node.start,
>  				cache_level, pte_flags);
> +
> +	return 0;
>  }
>  
>  static void ppgtt_unbind_vma(struct i915_vma *vma)
> @@ -1898,22 +1903,26 @@ static void i915_ggtt_clear_range(struct i915_address_space *vm,
>  	intel_gtt_clear_range(first_entry, num_entries);
>  }
>  
> -static void ggtt_bind_vma(struct i915_vma *vma,
> -			  enum i915_cache_level cache_level,
> -			  u32 flags)
> +static int ggtt_bind_vma(struct i915_vma *vma,
> +			 enum i915_cache_level cache_level,
> +			 u32 flags)
>  {
>  	struct drm_device *dev = vma->vm->dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct drm_i915_gem_object *obj = vma->obj;
>  	struct sg_table *pages = obj->pages;
>  	u32 pte_flags = 0;
> +	int ret;
> +
> +	ret = i915_get_ggtt_vma_pages(vma);
> +	if (ret)
> +		return ret;
> +	pages = vma->ggtt_view.pages;
>  
>  	/* Currently applicable only to VLV */
>  	if (obj->gt_ro)
>  		pte_flags |= PTE_READ_ONLY;
>  
> -	if (i915_is_ggtt(vma->vm))
> -		pages = vma->ggtt_view.pages;
>  
>  	if (!dev_priv->mm.aliasing_ppgtt || flags & GLOBAL_BIND) {
>  		vma->vm->insert_entries(vma->vm, pages,
> @@ -1929,6 +1938,8 @@ static void ggtt_bind_vma(struct i915_vma *vma,
>  					    vma->node.start,
>  					    cache_level, pte_flags);
>  	}
> +
> +	return 0;
>  }
>  
>  static void ggtt_unbind_vma(struct i915_vma *vma)
> @@ -2749,7 +2760,7 @@ err_st_alloc:
>  	return ERR_PTR(ret);
>  }
>  
> -static inline int
> +static int
>  i915_get_ggtt_vma_pages(struct i915_vma *vma)
>  {
>  	int ret = 0;
> @@ -2793,8 +2804,8 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma)
>  int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
>  		  u32 flags)
>  {
> +	int ret = 0;
>  	u32 bind_flags = 0;
> -	int ret;
>  
>  	if (vma->vm->allocate_va_range) {
>  		trace_i915_va_alloc(vma->vm, vma->node.start,
> @@ -2808,12 +2819,6 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
>  			return ret;
>  	}
>  
> -	if (i915_is_ggtt(vma->vm)) {
> -		ret = i915_get_ggtt_vma_pages(vma);
> -		if (ret)
> -			return 0;
> -	}
> -
>  	if (flags & PIN_GLOBAL)
>  		bind_flags |= GLOBAL_BIND;
>  	if (flags & PIN_EXECBUF)
> @@ -2825,7 +2830,9 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
>  		bind_flags &= ~vma->bound;
>  
>  	if (bind_flags)
> -		vma->vm->bind_vma(vma, cache_level, bind_flags);
> +		ret = vma->vm->bind_vma(vma, cache_level, bind_flags);
> +	if (ret)
> +		return ret;
>  
>  	vma->bound |= bind_flags;
>  
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
> index fb0a04aa5363..4e6cac575cd8 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.h
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
> @@ -278,9 +278,9 @@ struct i915_address_space {
>  	 * setting the valid PTE entries to a reserved scratch page. */
>  	void (*unbind_vma)(struct i915_vma *vma);
>  	/* Map an object into an address space with the given cache flags. */
> -	void (*bind_vma)(struct i915_vma *vma,
> -			 enum i915_cache_level cache_level,
> -			 u32 flags);
> +	int (*bind_vma)(struct i915_vma *vma,
> +			enum i915_cache_level cache_level,
> +			u32 flags);
>  };
>  
>  /* The Graphics Translation Table is the way in which GEN hardware translates a
> -- 
> 2.1.0
>
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