[igt-dev] [PATCH i-g-t 1/2] i915/gem_tiled_pread_*: Add check for FENCE based tiling support

[Siddiqui, Ayaz A]

> -----Original Message-----
> From: Chris Wilson <chris at chris-wilson.co.uk>
> Sent: Sunday, February 2, 2020 3:57 PM
> To: Dixit, Ashutosh <ashutosh.dixit at intel.com>; Siddiqui, Ayaz A
> <ayaz.siddiqui at intel.com>
> Cc: igt-dev at lists.freedesktop.org
> Subject: Re: [igt-dev] [PATCH i-g-t 1/2] i915/gem_tiled_pread_*: Add check
> for FENCE based tiling support
> 
> Quoting Dixit, Ashutosh (2020-02-01 21:05:50)
> > On Sat, 01 Feb 2020 11:33:46 -0800, Ayaz A Siddiqui wrote:
> > >
> > > These tests are verifying integrity of the tiled data read and write
> > > operation on platforms which supports FENCE based tiling.
> > >
> > > A check has been added to skip these tests if FENCES  are not
> > > available in platform.
> > > Tests updated in this patch :
> > > 1. gem_tiled_pread_basic
> > > 2. gem_tiled_pread_pwrite
> > >
> > > Signed-off-by: Ayaz A Siddiqui <ayaz.siddiqui at intel.com>
> > > ---
> > >  tests/i915/gem_tiled_pread_basic.c  | 2 +-
> > > tests/i915/gem_tiled_pread_pwrite.c | 1 +
> > >  2 files changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/tests/i915/gem_tiled_pread_basic.c
> > > b/tests/i915/gem_tiled_pread_basic.c
> > > index 1ac9eccd..7cb64410 100644
> > > --- a/tests/i915/gem_tiled_pread_basic.c
> > > +++ b/tests/i915/gem_tiled_pread_basic.c
> > > @@ -124,7 +124,7 @@ igt_simple_main
> > >       uint32_t devid;
> > >
> > >       fd = drm_open_driver(DRIVER_INTEL);
> > > -
> > > +     igt_require(gem_available_fences(fd) > 0);
> > >       handle = create_bo(fd);
> > >       igt_require(gem_get_tiling(fd, handle, &tiling, &swizzle));
> > >
> > > diff --git a/tests/i915/gem_tiled_pread_pwrite.c
> > > b/tests/i915/gem_tiled_pread_pwrite.c
> > > index 0988a4e8..ee163843 100644
> > > --- a/tests/i915/gem_tiled_pread_pwrite.c
> > > +++ b/tests/i915/gem_tiled_pread_pwrite.c
> > > @@ -122,6 +122,7 @@ igt_simple_main
> > >
> > >               current_tiling_mode = I915_TILING_X;
> > >
> > > +             igt_require(gem_available_fences(fd) > 0);
Agreed I'll move this line after drm_open_driver. 
> > >               handle = create_bo_and_fill(fd);
> > >               igt_require(gem_get_tiling(fd, handle, &tiling,
> > > &swizzle));
> >
> > Both these places already have igt_require(gem_get_tiling()) which is
> > equivalent so I'd say this patch is not requried.
> 
> Indeed. But I think adding igt_require(gem_foo_fences) will be a useful
> addition to the explicit fenced tests. If we don't replace them all first.
> -Chris
gem_set_tiling is being called in create_bo_and_fill ()with assert.
igt_require(gem_get_tiling()) being called to verify sanity of tiling being set
during bo creation.

So we need to check if fences are available or not before call of  bo creation.

Regards
-Ayaz