On Tue, Feb 28, 2017 at 05:28:07PM +0200, Mika Kuoppala wrote:
> +static inline unsigned int
> +i915_pdpes_per_pdp(const struct i915_address_space *vm)
> +{
> + if (i915_vm_is_48bit(vm))
> + return GEN8_PML4ES_PER_PML4;
> +
> + return GEN8_LEGACY_PDPES;
> +}
Does this need to be in the header? Isn't it private to i915_gem_ppgtt.c?
> /* Equivalent to the gen6 version, For each pde iterates over every pde
> * between from start until start + length. On gen8+ it simply iterates
> * over every page directory entry in a page directory.
> @@ -471,7 +483,7 @@ static inline u32 gen6_pde_index(u32 addr)
>
> #define gen8_for_each_pdpe(pd, pdp, start, length, iter) \
> for (iter = gen8_pdpe_index(start); \
> - length > 0 && iter < I915_PDPES_PER_PDP(dev) && \
> + length > 0 && iter < i915_pdpes_per_pdp(vm) && \
Oh. Because of a pair of impossible conditions here.
Add rewriting these iterators based on the knowleged that length is
assert to be > 0 and <= total - start to the task list.
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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