From: Chris Wilson chris.p.wilson@intel.com
[ Upstream commit e5a95c83ed1492c0f442b448b20c90c8faaf702b ]
Skip all further TLB invalidations once the device is wedged and had been reset, as, on such cases, it can no longer process instructions on the GPU and the user no longer has access to the TLB's in each engine.
So, an attempt to do a TLB cache invalidation will produce a timeout.
That helps to reduce the performance regression introduced by TLB invalidate logic.
Cc: stable@vger.kernel.org Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store") Signed-off-by: Chris Wilson chris.p.wilson@intel.com Cc: Fei Yang fei.yang@intel.com Cc: Tvrtko Ursulin tvrtko.ursulin@intel.com Reviewed-by: Andi Shyti andi.shyti@linux.intel.com Acked-by: Thomas Hellström thomas.hellstrom@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Andi Shyti andi.shyti@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/5aa86564b9ec5fe7fe605c1dd7de76... (cherry picked from commit be0366f168033374a93e4c43fdaa1a90ab905184) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/i915/gt/intel_gt.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 3a76000d15bfd..ed8ad3b263959 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -949,6 +949,9 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt) if (I915_SELFTEST_ONLY(gt->awake == -ENODEV)) return;
+ if (intel_gt_is_wedged(gt)) + return; + if (GRAPHICS_VER(i915) == 12) { regs = gen12_regs; num = ARRAY_SIZE(gen12_regs);