We had missed a bit of errata - PS scratch needs to be computed as if
there were 4 subslices per slice, rather than 3.
Skylake Broxton Kabylake
GT1 GT2 GT3 GT4 2x6 3x6 GT1 GT1.5 GT2 GT3 GT4
Actual Slices 1 1 2 3 1 1 1 1 1 2 3
Total Subslices 3 3 6 9 2 3 2 3 3 6 9
Subsl. for PS Scratch 4 4 8 12 4 4 4 4 4 8 12
Note that Skylake GT1-3 already worked because we allocated 64 * 9
(trying to use a value that would work on GT4, with 9 subslices),
and the actual required values were 64 * 4 or 64 * 8. However, all
others (Skylake GT4, Broxton, and Kabylake GT1-4) underallocated,
which can lead to scratch writes trashing random process memory,
and rendering corruption or GPU hangs.
Fixes GPU hangs and rendering corruption on Skylake GT4 in shaders that
spill. Particularly, dEQP-GLES31.functional.ubo.all_per_block_buffers.*
now runs successfully with no hangs and renders correctly. This may
fix problems on Broxton and Kabylake as well.
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
(warning: 'const' type qualifier on return type has no effect)
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Make gen_device_info a mutable structure so we can update the fields that
can be refined by querying the kernel (like subslices and EU numbers).
This patch does not make any functional change, it just makes
gen_get_device_info() fill a structure rather than returning a const
pointer.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Generated by:
sed -i -e 's/brw_device_info/gen_device_info/g' src/intel/**/*.c
sed -i -e 's/brw_device_info/gen_device_info/g' src/intel/**/*.h
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.c
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.cpp
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.h
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
2016-09-03 08:23:06 -07:00
Renamed from src/intel/common/brw_device_info.c (Browse further)
