From 5f521722a2a2391d693afccdf6e12be2754382d8 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 7 Sep 2018 12:28:51 +0100 Subject: [PATCH] drm/i915: Missed interrupt simulation is no more, tell the world Using the guc, we cannot disable the user interrupt generation as we use it for driving submission. And from Icelake, we no longer have the ability to individually mask interrupt generation from each engine, disabling our ability to fake missed interrupts. In both cases, report back to userspace that the missed interrupt generator is no longer available. Signed-off-by: Chris Wilson Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20180907112856.28242-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_debugfs.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 1f7051e97afb..b4744a68cd88 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4117,6 +4117,17 @@ i915_ring_test_irq_set(void *data, u64 val) { struct drm_i915_private *i915 = data; + /* GuC keeps the user interrupt permanently enabled for submission */ + if (USES_GUC_SUBMISSION(i915)) + return -ENODEV; + + /* + * From icl, we can no longer individually mask interrupt generation + * from each engine. + */ + if (INTEL_GEN(i915) >= 11) + return -ENODEV; + val &= INTEL_INFO(i915)->ring_mask; DRM_DEBUG_DRIVER("Masking interrupts on rings 0x%08llx\n", val); -- 2.30.2