[Intel-gfx] [PATCH 34/34] drm/i915: Create VMAs (part 3)

Chris Wilson chris at chris-wilson.co.uk
Mon May 27 09:31:47 CEST 2013

On Sat, May 25, 2013 at 12:27:08PM -0700, Ben Widawsky wrote:
> Plumb the functions we care about with VM arguments.
> With the exception of the hack in i915_ppgtt_bind to only ever be able
> to do aliasing PPGTT, this most everything we want.

Purge is wrong -- it needs to select a victim obj and unbind it from all
vma at once, then repeat for a new victim.

obj->pin_count is per-vma. Most of the pinning is only relevant for the
ggtt (pinned for registers), with other vma only using it for
reserve/eviction. But we can remove things from the ppgtt if they are
only pinned due to scanout, for example.

Do not start introducing i915_obj_* piecemeal, keep it i915_gem_obj_*.

debugfs needs more insight into per-vma tracking.

Chris Wilson, Intel Open Source Technology Centre

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