linux_dsm_epyc7002/drivers/gpu
Chris Wilson 450362d3fe drm/i915/execlists: Wrap tail pointer after reset tweaking
If the request->wa_tail is 0 (because it landed exactly on the end of
the ringbuffer), when we reconstruct request->tail following a reset we
fill in an illegal value (-8 or 0x001ffff8). As a result, RING_HEAD is
never able to catch up with RING_TAIL and the GPU spins endlessly. If
the ring contains a couple of breadcrumbs, even our hangcheck is unable
to catch the busy-looping as the ACTHD and seqno continually advance.

v2: Move the wrap into a common intel_ring_wrap().

Fixes: a3aabe86a3 ("drm/i915/execlists: Reinitialise context image after GPU hang")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: <stable@vger.kernel.org> # v4.10+
Link: http://patchwork.freedesktop.org/patch/msgid/20170327130009.4678-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
2017-03-27 15:02:56 +01:00
..
drm drm/i915/execlists: Wrap tail pointer after reset tweaking 2017-03-27 15:02:56 +01:00
host1x gpu: host1x: Set OF node for new host1x devices 2017-01-30 11:47:44 +01:00
ipu-v3 gpu: ipu-v3: only set non-zero AXI ID for IC when PRG is absent 2017-03-16 10:14:49 +01:00
vga Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
Makefile