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drm/i915: Reuse the active golden render state batch

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The golden render state is constant, but we recreate the batch setting
it up for every new context. If we keep that batch in a volatile cache
we can safely reuse it whenever we need to initialise a new context. We
mark the pages as purgeable and use the shrinker to recover pages from
the batch whenever we face memory pressues, recreating that batch afresh
on the next new context.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtien@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161028125858.23563-8-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2016-10-28 13:58:31 +01:00
parent 920cf41949
commit 4e50f082ac
6 changed files with 131 additions and 73 deletions
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3
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -157,6 +157,7 @@ struct i915_ctx_workarounds {
};
struct drm_i915_gem_request;
struct intel_render_state;
struct intel_engine_cs {
struct drm_i915_private *i915;
@@ -184,6 +185,8 @@ struct intel_engine_cs {
unsigned int irq_shift;
struct intel_ring *buffer;
struct intel_render_state *render_state;
/* Rather than have every client wait upon all user interrupts,
* with the herd waking after every interrupt and each doing the
* heavyweight seqno dance, we delegate the task (of being the