Re: [PATCH i-g-t] i915/gem_workarounds: Require GPU resets

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Quoting Tvrtko Ursulin (2019-01-30 08:11:05)
> 
> On 29/01/2019 18:57, Chris Wilson wrote:
> > Quoting Tvrtko Ursulin (2019-01-28 13:47:02)
> >>
> >> On 28/01/2019 11:23, Chris Wilson wrote:
> >>> Check that we are allowed to reset the GPU prior to execution.
> >>>
> >>> v2: Push the require checking up into a subgroup
> >>>
> >>> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> >>> ---
> >>>    tests/i915/gem_workarounds.c | 29 ++++++++++++++++++++++++++---
> >>>    1 file changed, 26 insertions(+), 3 deletions(-)
> >>>
> >>> diff --git a/tests/i915/gem_workarounds.c b/tests/i915/gem_workarounds.c
> >>> index 78478ad2c..44e3dce8a 100644
> >>> --- a/tests/i915/gem_workarounds.c
> >>> +++ b/tests/i915/gem_workarounds.c
> >>> @@ -282,9 +282,32 @@ igt_main
> >>>        }
> >>>    
> >>>        for (op = ops; op->name; op++) {
> >>> -             for (m = modes; m->name; m++) {
> >>> -                     igt_subtest_f("%s%s", op->name, m->name)
> >>> -                             check_workarounds(device, op->op, m->flags);
> >>> +             igt_subtest_group {
> >>> +                     igt_hang_t hang = {};
> >>> +
> >>> +                     igt_fixture {
> >>> +                             switch (op->op) {
> >>> +                             case GPU_RESET:
> >>> +                                     hang = igt_allow_hang(device, 0, 0);
> >>> +                                     break;
> >>> +                             default:
> >>> +                                     break;
> >>> +                             }
> >>> +                     }
> >>> +
> >>> +                     for (m = modes; m->name; m++)
> >>> +                             igt_subtest_f("%s%s", op->name, m->name)
> >>> +                                     check_workarounds(device, op->op, m->flags);
> >>> +
> >>> +                     igt_fixture {
> >>> +                             switch (op->op) {
> >>> +                             case GPU_RESET:
> >>> +                                     igt_disallow_hang(device, hang);
> >>> +                                     break;
> >>> +                             default:
> >>> +                                     break;
> >>> +                             }
> >>> +                     }
> >>>                }
> >>>        }
> >>>    }
> >>>
> >>
> >> Why the verbose switch and not just:
> >>
> >>          it (op->op == GPU_RESET)
> >>                  hand = igt_allow_hang(...)
> > 
> > It matched the lower level and I thought would be easier to extend in
> > future.
> 
> Okay I guess.

More accurately I was too lazy to implement a require vfunc with a data
struct.
-Chris
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