Quoting Mika Kuoppala (2018-08-08 09:35:51) > Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes: > > > An oddity occurs on Sandybridge, Ivybridge and Haswell (and presumably > > Valleyview) in that for the period following the GPU restart after a > > reset, there are no GT interrupts received. From Ville's notes, bit 0 in > > the HWSTAM corresponds to the render interrupt, and if we unmask it we > > do see immediate resumption of GT interrupt delivery (via the master irq > > handler) after the reset. > > > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107500 > > Fixes: c5498089463b ("drm/i915: Mask everything in ring HWSTAM on gen6+ in ringbuffer mode") > > References: d420a50c21ef ("drm/i915: Clean up the HWSTAM mess") > > Testcase: igt/gem_eio/reset-stress > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > --- > > drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c > > index 8003cef767ba..9b526b0f755a 100644 > > --- a/drivers/gpu/drm/i915/intel_ringbuffer.c > > +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c > > @@ -388,7 +388,7 @@ static void intel_ring_setup_status_page(struct intel_engine_cs *engine) > > } > > > > if (INTEL_GEN(dev_priv) >= 6) > > - I915_WRITE(RING_HWSTAM(engine->mmio_base), 0xffffffff); > > + I915_WRITE(RING_HWSTAM(engine->mmio_base), 0xfffffffe); > > Yeah bit 0 is MI_USER_INTERRUPT on render. And execlists keeps all masked. > > There are bits for other engines too so add more paranoia? It's per ring though? -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
