From: Chris Wilson <chris@chris-wilson.co.uk>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 4/5] drm/i915: Always flush tiling changes before accessing through the GTT
Date: Sat, 14 Apr 2012 22:59:25 +0100 [thread overview]
Message-ID: <1334440777_831@CP5-2952> (raw)
In-Reply-To: <20120414215452.GC4215@phenom.ffwll.local>
On Sat, 14 Apr 2012 23:54:52 +0200, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Sat, Apr 14, 2012 at 09:55:50AM +0100, Chris Wilson wrote:
> > As we defer updating the fence register from set-tiling to the point of
> > use, we need to declare every access through the GTT as either fenced or
> > unfenced.
> >
> > This patches fixes up a couple of freshly introduced GTT accesses which
> > missed the fence flush.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>
> Actually no, this set_to_gtt is actually just a flush+wait_rendering
> because the shmem pwrite/pread afters does clever in-line clflushing.
> Abuse of interfaces, I know ...
Probably best to leave a note, so the next time I do a grep looking for
use of set-to-gtt without a following fence declaration, I don't submit
another patch. :-)
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
next prev parent reply other threads:[~2012-04-14 21:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-14 8:55 [PATCH 1/5] drm/i915: Suppress EIO during set-to-gtt Chris Wilson
2012-04-14 8:55 ` [PATCH 2/5] drm/i915: Suppress EIO through fence-flushing Chris Wilson
2012-04-14 9:02 ` Chris Wilson
2012-04-14 8:55 ` [PATCH 3/5] drm/i915: Suppress EIO during i915_gem_idle() Chris Wilson
2012-04-18 8:51 ` Daniel Vetter
2012-04-18 9:03 ` Chris Wilson
2012-04-14 8:55 ` [PATCH 4/5] drm/i915: Always flush tiling changes before accessing through the GTT Chris Wilson
2012-04-14 21:54 ` Daniel Vetter
2012-04-14 21:59 ` Chris Wilson [this message]
2012-04-14 8:55 ` [PATCH 5/5] " Chris Wilson
2012-04-14 22:00 ` Daniel Vetter
2012-04-18 8:48 ` Daniel Vetter
2012-04-14 9:02 ` [PATCH 1/5] drm/i915: Suppress EIO during set-to-gtt Chris Wilson
2012-04-18 9:03 ` Daniel Vetter
2012-04-18 9:10 ` Chris Wilson
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