drm/i915: Micro-optimise gen8_ppgtt_insert_entries()

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Improve the sg iteration and in hte process eliminate a bug in
miscomputing the pml4 length as orig_nents<<PAGE_SHIFT is no longer the
full length of the sg table.

v2: Check for the end of the fourth level page table (the final pdpe)
and move onto the next.
v3: Assert that 3lvl insert_pte_entries doesn't overflow its smaller set
of PDP.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215084357.19977-3-chris@chris-wilson.co.uk

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Chris Wilson 2017-02-15 08:43:37 +00:00

parent b31144c0da

commit 894ccebee2

1 changed files with 93 additions and 79 deletions

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drivers/gpu/drm/i915/i915_gem_gtt.c

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