From: Shane Francis <bigbeeshane@gmail.com>
To: "Ruhl, Michael J" <michael.j.ruhl@intel.com>
Cc: "airlied@linux.ie" <airlied@linux.ie>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"amd-gfx-request@lists.freedesktop.org"
<amd-gfx-request@lists.freedesktop.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"alexander.deucher@amd.com" <alexander.deucher@amd.com>,
"christian.koenig@amd.com" <christian.koenig@amd.com>
Subject: Re: [PATCH v4 3/3] drm/radeon: fix scatter-gather mapping with user pages
Date: Wed, 25 Mar 2020 15:54:33 +0000 [thread overview]
Message-ID: <CABnpCuD-A20o3cQrPb+LwbsSRTGPwwdCAYYsSjeCdmimNMYyYA@mail.gmail.com> (raw)
In-Reply-To: <14063C7AD467DE4B82DEDB5C278E8663FFFBD48B@fmsmsx107.amr.corp.intel.com>
> >-----Original Message-----
> >From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of
> >Shane Francis
> >Sent: Wednesday, March 25, 2020 5:08 AM
> >To: dri-devel@lists.freedesktop.org
> >Cc: airlied@linux.ie; linux-kernel@vger.kernel.org; bigbeeshane@gmail.com;
> >amd-gfx-request@lists.freedesktop.org; alexander.deucher@amd.com;
> >christian.koenig@amd.com
> >Subject: [PATCH v4 3/3] drm/radeon: fix scatter-gather mapping with user
> >pages
> >
> >Calls to dma_map_sg may return segments / entries than requested
>
> "may return less segment..." ?
> ^^^
I will reword / fix the highlighted issues with the text and send a updated
patch set later today.
>
> >if they fall on page bounderies. The old implementation did not
> >support this use case.
> >
> >Signed-off-by: Shane Francis <bigbeeshane@gmail.com>
> >---
> > drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> >diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c
> >b/drivers/gpu/drm/radeon/radeon_ttm.c
> >index 3b92311d30b9..b3380ffab4c2 100644
> >--- a/drivers/gpu/drm/radeon/radeon_ttm.c
> >+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> >@@ -528,7 +528,7 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_tt
> >*ttm)
> >
> > r = -ENOMEM;
> > nents = dma_map_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents,
> >direction);
> >- if (nents != ttm->sg->nents)
> >+ if (nents == 0)
> > goto release_sg;
>
> This looks correct to me.
>
> Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
>
> M
> > drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
> >--
> >2.26.0
> >
> >_______________________________________________
> >dri-devel mailing list
> >dri-devel@lists.freedesktop.org
> >https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
dri-devel mailing list
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-03-25 15:54 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 9:07 [PATCH v4 0/3] AMDGPU / RADEON / DRM Fix mapping of user pages Shane Francis
2020-03-25 9:07 ` [PATCH v4 1/3] drm/prime: use dma length macro when mapping sg Shane Francis
2020-03-25 13:56 ` Ruhl, Michael J
[not found] ` <CGME20200327075458eucas1p2f1011560c5d2d2a754d2394f56367ebb@eucas1p2.samsung.com>
2020-03-27 7:54 ` [v4,1/3] " Marek Szyprowski
2020-03-27 8:11 ` Christian König
2020-03-27 9:10 ` Marek Szyprowski
2020-03-30 8:18 ` Marek Szyprowski
2020-03-30 9:39 ` Shane Francis
2020-03-30 12:32 ` Shane Francis
2020-03-30 12:34 ` Shane Francis
2020-03-30 13:23 ` Alex Deucher
2020-03-31 5:25 ` Marek Szyprowski
2020-03-31 14:10 ` Alex Deucher
2020-03-31 14:29 ` Marek Szyprowski
[not found] ` <CGME20200327082702eucas1p1a66dd059480c9d02b8f0f3ab225db2c3@eucas1p1.samsung.com>
2020-03-27 8:26 ` Marek Szyprowski
2020-03-25 9:07 ` [PATCH v4 2/3] drm/amdgpu: fix scatter-gather mapping with user pages Shane Francis
2020-03-25 14:00 ` Ruhl, Michael J
2020-03-25 9:07 ` [PATCH v4 3/3] drm/radeon: " Shane Francis
2020-03-25 14:19 ` Ruhl, Michael J
2020-03-25 15:54 ` Shane Francis [this message]
2020-03-25 16:08 ` Alex Deucher
2020-03-25 13:11 ` [PATCH v4 0/3] AMDGPU / RADEON / DRM Fix mapping of " Ruhl, Michael J
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