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From: Ramalingam C <ramalingam.c@intel.com>
To: "Dixit, Ashutosh" <ashutosh.dixit@intel.com>
Cc: igt-dev <igt-dev@lists.freedesktop.org>
Subject: Re: [igt-dev] [PATCH i-g-t 4/9] tests/prime_mmap: use device coherent mapping instead of mmap_gtt
Date: Sun, 2 Feb 2020 23:58:12 +0530	[thread overview]
Message-ID: <20200202182812.GB30003@intel.com> (raw)
In-Reply-To: <871rre6bhi.wl-ashutosh.dixit@intel.com>

On 2020-01-31 at 22:57:29 -0800, Dixit, Ashutosh wrote:
> On Fri, 31 Jan 2020 09:31:04 -0800, Ramalingam C wrote:
> >
> > Since on new discrete GPUs we dont have the mappable aperture, if that
> > is acceptable for the test purpose, we should use GEM_MMAP_OFFSET.
> > Hence using gem_mmap_device_coherent() which wraps the mmap options in
> > the order of gem_mmap_offset / gem_mmap / mmap_gtt
> >
> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> > ---
> >  tests/prime_mmap.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tests/prime_mmap.c b/tests/prime_mmap.c
> > index fc985784407b..1433424109c8 100644
> > --- a/tests/prime_mmap.c
> > +++ b/tests/prime_mmap.c
> > @@ -85,8 +85,8 @@ test_correct(void)
> >	dma_buf_fd = prime_handle_to_fd(fd, handle);
> >	igt_assert(errno == 0);
> >
> > -	/* Check correctness vs GEM_MMAP_GTT */
> > -	ptr1 = gem_mmap__gtt(fd, handle, BO_SIZE, PROT_READ);
> > +	/* Check correctness vs GEM_MMAP */
> > +	ptr1 = gem_mmap__device_coherent(fd, handle, 0, BO_SIZE, PROT_READ);
> 
> Once again, does this test pass with gtt mapping but fail with wc mapping?
> I thought gtt mapping also bypasses the cache like wc? What about prime
> mmap's? Can someone please confirm? Otherwise I will try to look.
Ashutosh,

At this test subtest test-correct is failing at gem_mmap__gtt, but
passes when we use device coherent mapping.

-Ram
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  reply	other threads:[~2020-02-02 18:28 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-31 17:31 [igt-dev] [PATCH i-g-t 0/9] Handling mmap_gtt Ramalingam C
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 1/9] tests/prime_vgem: Skip fence and gtt specific tests Ramalingam C
2020-02-01  5:42   ` Dixit, Ashutosh
2020-02-03  9:19     ` Janusz Krzysztofik
2020-02-03  9:28   ` Janusz Krzysztofik
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 2/9] tests/intel_dp_compliance: Skip tests as tiling is not supported Ramalingam C
2020-02-01  5:55   ` Dixit, Ashutosh
2020-02-04  5:55     ` Dixit, Ashutosh
2020-02-04  6:00       ` Ramalingam C
2020-02-04  6:15         ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 3/9] tests/prime_mmap_coherency: use device coherent mapping instead of mmap_gtt Ramalingam C
2020-02-01  6:27   ` Dixit, Ashutosh
2020-02-02 18:24     ` Ramalingam C
2020-02-04  6:14     ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 4/9] tests/prime_mmap: " Ramalingam C
2020-02-01  6:57   ` Dixit, Ashutosh
2020-02-02 18:28     ` Ramalingam C [this message]
2020-02-04  6:29     ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 5/9] tests/kms_psr: Skip tests on mmap_gtt, if no mappable aperture Ramalingam C
2020-02-04  6:38   ` Dixit, Ashutosh
2020-02-09  0:41     ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 6/9] tests/kms_available_modes_crc: Skip test if mappable aperture not supported Ramalingam C
2020-02-04  6:49   ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 7/9] tests/i915_pm_rpm: use device coherent mapping instead of mmap_gtt Ramalingam C
2020-02-05  0:16   ` Dixit, Ashutosh
2020-02-07 12:59     ` Ramalingam C
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 8/9] tests/i915_suspend: skip fence related tests, if no mmap_gtt Ramalingam C
2020-02-05  2:06   ` Dixit, Ashutosh
2020-01-31 17:31 ` [igt-dev] [PATCH i-g-t 9/9] tests/gem_tiling_max_stride: Skip if set tiling is not supported Ramalingam C
2020-02-05  0:43   ` Antonio Argenziano
2020-02-05  1:29     ` Dixit, Ashutosh
2020-01-31 18:45 ` [igt-dev] ✓ Fi.CI.BAT: success for Handling mmap_gtt Patchwork
2020-02-04 12:30 ` [igt-dev] ✗ Fi.CI.IGT: failure " Patchwork

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