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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-23 13:05:57 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-23 15:53:00 +0000 |
| commit | f8dd2934c4ec03a56cfc1b7d23c0248aa6e4adf0 (patch) | |
| tree | 2ebcbe53fa339a3ea71df90c4fbc963bc17e1e4d | |
| parent | 70962fbe5c75e785d250c04db4d01c18b7316c13 (diff) | |
| download | talos-obmc-linux-f8dd2934c4ec03a56cfc1b7d23c0248aa6e4adf0.tar.gz talos-obmc-linux-f8dd2934c4ec03a56cfc1b7d23c0248aa6e4adf0.zip | |
drm/i915: Remove BXT incoherent seqno write workaround
This w/a was only used for preproduction hw, which is no longer in use.
Remove the workaround to simplify the code.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170123130601.2281-2-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lrc.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 8ffa4961aa40..202ce1e6e499 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1638,21 +1638,6 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request, return 0; } -static void bxt_a_seqno_barrier(struct intel_engine_cs *engine) -{ - /* - * On BXT A steppings there is a HW coherency issue whereby the - * MI_STORE_DATA_IMM storing the completed request's seqno - * occasionally doesn't invalidate the CPU cache. Work around this by - * clflushing the corresponding cacheline whenever the caller wants - * the coherency to be guaranteed. Note that this cacheline is known - * to be clean at this point, since we only write it in - * bxt_a_set_seqno(), where we also do a clflush after the write. So - * this clflush in practice becomes an invalidate operation. - */ - intel_flush_status_page(engine, I915_GEM_HWS_INDEX); -} - /* * Reserve space for 2 NOOPs at the end of each request to be * used as a workaround for not being allowed to do lite @@ -1800,8 +1785,6 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine) engine->irq_enable = gen8_logical_ring_enable_irq; engine->irq_disable = gen8_logical_ring_disable_irq; engine->emit_bb_start = gen8_emit_bb_start; - if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1)) - engine->irq_seqno_barrier = bxt_a_seqno_barrier; } static inline void |
