[Intel-gfx] [PATCH v17 4/4] drm/i915/selftests: Introduce live tests of private PAT management

[Chris Wilson]

Quoting Zhi Wang (2017-09-14 13:39:43)
> Introduce two live tests of private PAT management:
> 
> igt_ppat_init - This test is to check if all the PPAT configurations are
> written into HW.
> 
> igt_ppat_get - This test performs several sub-tests on intel_ppat_get()
> and intel_ppat_put().
> 
> The "perfect match" test case will try to get a PPAT entry with an existing
> value, then check if the returned PPAT entry is the same one.
> 
> The "alloc entries" test case will run out of PPAT table, and check if all
> the requested values are put into the newly allocated PPAT entries.
> 
> The negative test case will try to generate a new PPAT value, and get it
> when PPAT table is full.
> 
> The "partial match" test case will generate a parital matched value from
> the existing PPAT table and try to match it.
> 
> The "re-alloc" test case will try to free and then allocate a new entry
> when the PPAT table is full.
> 
> The "put entries" test case will free all the PPAT entries that allocated
> in "alloc entries" test case. It will check if the values of freed PPAT
> entries turn into ppat->clear_value.
> 
> v11:
> 
> - Fix one indent problem in v10.
> 
> v10:
> 
> - Refine code structure.
> - Introduce "re-alloc" test case. (Chris)
> 
> v9:
> 
> - Refine generate_new_value(). (Chris)
> - Refine failure output. (Chris)
> - Refine test flow of "perfect match". (Chris)
> - Introduce another negative test case after "partial match". (Chris)
> 
> v8:
> 
> - Remove noisy output. (Chris)
> - Add negative test case. (Chris)
> 
> Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
> Cc: Ben Widawsky <benjamin.widawsky at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

I can't think of any more conditions we need to cover,
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris