From: Alexandre Courbot <acourbot@nvidia.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: David Airlie <airlied@linux.ie>, Ben Skeggs <bskeggs@redhat.com>,
Lucas Stach <dev@lynxeye.de>,
Thierry Reding <thierry.reding@gmail.com>,
"gnurou@gmail.com" <gnurou@gmail.com>,
"nouveau@lists.freedesktop.org" <nouveau@lists.freedesktop.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers
Date: Tue, 24 Jun 2014 19:33:10 +0900 [thread overview]
Message-ID: <53A953E6.2030503@nvidia.com> (raw)
In-Reply-To: <20140624100220.GK32514@n2100.arm.linux.org.uk>
On 06/24/2014 07:02 PM, Russell King - ARM Linux wrote:
> On Tue, Jun 24, 2014 at 06:54:26PM +0900, Alexandre Courbot wrote:
>> From: Lucas Stach <dev@lynxeye.de>
>>
>> On architectures for which access to GPU memory is non-coherent,
>> caches need to be flushed and invalidated explicitly at the
>> appropriate places. Introduce two small helpers to make things
>> easy for TTM-based drivers.
>
> Have you run this with DMA API debugging enabled? I suspect you haven't,
> and I recommend that you do.
# cat /sys/kernel/debug/dma-api/error_count
162621
(╯°□°）╯︵ ┻━┻)
next prev parent reply other threads:[~2014-06-24 10:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-24 9:54 [PATCH v2 0/3] drm/ttm: nouveau: memory coherency for ARM Alexandre Courbot
2014-06-24 9:54 ` [PATCH v2 1/3] drm/ttm: recognize ARM arch in ioprot handler Alexandre Courbot
2014-06-24 9:54 ` [PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers Alexandre Courbot
2014-06-24 10:02 ` Russell King - ARM Linux
2014-06-24 10:33 ` Alexandre Courbot [this message]
2014-06-24 10:55 ` Alexandre Courbot
2014-06-24 12:23 ` Alexandre Courbot
2014-06-24 12:27 ` [Nouveau] " Maarten Lankhorst
2014-06-24 13:25 ` Lucas Stach
2014-06-24 13:52 ` Alexandre Courbot
2014-06-24 13:58 ` Lucas Stach
2014-06-24 14:03 ` Alexandre Courbot
2014-06-26 14:50 ` Alexandre Courbot
2014-06-25 4:00 ` Stéphane Marchesin
2014-06-26 14:53 ` Alexandre Courbot
2014-06-26 16:10 ` Russell King - ARM Linux
2014-06-26 23:17 ` Alexandre Courbot
2014-06-27 12:08 ` Rob Clark
2014-06-24 13:09 ` Russell King - ARM Linux
2014-06-24 13:25 ` Alexandre Courbot
2014-06-24 9:54 ` [PATCH v2 3/3] drm/nouveau: hook up cache sync functions Alexandre Courbot
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