From: Michael Walle <michael@walle.cc>
To: etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org
Cc: "Lukas F . Hartmann" <lukas@mntre.com>,
Marek Vasut <marek.vasut@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
Russell King <linux+etnaviv@armlinux.org.uk>,
Christian Gmeiner <christian.gmeiner@gmail.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH 3/3] drm/etnaviv: use a 32 bit mask as coherent DMA mask
Date: Thu, 26 Aug 2021 14:43:26 +0200 [thread overview]
Message-ID: <732be3deb2a29b9d9e274ee543fa3b89@walle.cc> (raw)
In-Reply-To: <20210826121006.685257-4-michael@walle.cc>
Am 2021-08-26 14:10, schrieb Michael Walle:
> The STLB and the first command buffer (which is used to set up the
> TLBs)
> has a 32 bit size restriction in hardware. There seems to be no way to
> specify addresses larger than 32 bit. Keep it simple and restict the
> addresses to the lower 4 GiB range for all coherent DMA memory
> allocations.
>
> Signed-off-by: Michael Walle <michael@walle.cc>
Suggested-by: Lucas Stach <l.stach@pengutronix.de>
is missing here. sorry, will add it in the next version.
-michael
prev parent reply other threads:[~2021-08-26 12:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-26 12:10 [PATCH 0/3] drm/etnaviv: IOMMU related fixes Michael Walle
2021-08-26 12:10 ` [PATCH 1/3] drm/etnaviv: use PLATFORM_DEVID_NONE Michael Walle
2021-08-26 12:59 ` Christian Gmeiner
2021-08-26 12:10 ` [PATCH 2/3] drm/etnaviv: fix dma configuration of the virtual device Michael Walle
2021-08-26 12:14 ` Russell King (Oracle)
2021-08-26 12:17 ` Michael Walle
2021-08-26 15:00 ` Robin Murphy
2021-08-26 15:17 ` Lucas Stach
2021-08-26 20:15 ` Robin Murphy
2021-08-26 12:10 ` [PATCH 3/3] drm/etnaviv: use a 32 bit mask as coherent DMA mask Michael Walle
2021-08-26 12:19 ` Russell King (Oracle)
2021-08-26 12:25 ` Michael Walle
2021-08-26 12:43 ` Michael Walle [this message]
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