From: "Dixit, Ashutosh" <ashutosh.dixit@intel.com>
To: Ramalingam C <ramalingam.c@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: Mon, 03 Feb 2020 22:29:24 -0800 [thread overview]
Message-ID: <87blqe50hn.wl-ashutosh.dixit@intel.com> (raw)
In-Reply-To: <871rre6bhi.wl-ashutosh.dixit@intel.com>
On Fri, 31 Jan 2020 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.
Similar to prime_mmap_coherency: according to Chris "the gtt mapping uses
WC" so cache effects for both WC and GTT mappings should be
equivalent. Also it is the regular handle not the prime handle which is
being mmap'd using gem_mmap__device_coherent(). Therefore:
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
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next prev parent reply other threads:[~2020-02-04 6:29 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
2020-02-04 6:29 ` Dixit, Ashutosh [this message]
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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