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drm/i915: Always pin contexts into the high GGTT

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Now that we have fast top-down insertion into the drm_mm, we can use it
for frequent runtime operations like insertion of the context object,
whereas before we limited it to the one-off insertion of the pinned
kernel context. Keeping the active context objects out of the mappable
region of the global GTT (except under memory pressure) improves our
ability to allocate mappable aperture region without triggering a GPU
stall.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170210101422.1598-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson
2017-02-10 10:14:22 +00:00
parent 370a81fb89
commit 72b72ae473
2 changed files with 4 additions and 12 deletions
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4
drivers/gpu/drm/i915/intel_lrc.c
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@@ -773,11 +773,9 @@ static int execlists_context_pin(struct intel_engine_cs *engine,
}
GEM_BUG_ON(!ce->state);
flags = PIN_GLOBAL;
flags = PIN_GLOBAL | PIN_HIGH;
if (ctx->ggtt_offset_bias)
flags |= PIN_OFFSET_BIAS | ctx->ggtt_offset_bias;
if (i915_gem_context_is_kernel(ctx))
flags |= PIN_HIGH;
ret = i915_vma_pin(ce->state, 0, GEN8_LR_CONTEXT_ALIGN, flags);
if (ret)