From: Joerg Roedel <joro@8bytes.org>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Mikko Perttunen <cyndis@kapsi.fi>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Ben Skeggs <bskeggs@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Nicolas Chauvet <kwizart@gmail.com>,
devicetree@vger.kernel.org, nouveau@lists.freedesktop.org,
iommu@lists.linux-foundation.org,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU
Date: Fri, 27 Jul 2018 10:25:13 +0200 [thread overview]
Message-ID: <20180727082512.lpvmeuvxnw3mpeym@8bytes.org> (raw)
In-Reply-To: <20180726231624.21084-1-digetx@gmail.com>
On Fri, Jul 27, 2018 at 02:16:18AM +0300, Dmitry Osipenko wrote:
> The proposed solution adds a new option to the base device driver
> structure that allows device drivers to explicitly convey to the drivers
> core that the implicit IOMMU backing for devices must not happen.
Why is IOMMU mapping a problem for the Tegra GPU driver?
If we add something like this then it should not be the choice of the
device driver, but of the user and/or the firmware.
Joerg
next prev parent reply other threads:[~2018-07-27 8:25 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-26 23:16 [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 1/6] driver core: Add option for disabling of backing devices DMA " Dmitry Osipenko
[not found] ` <20180726231624.21084-1-digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-07-26 23:16 ` [RFC PATCH v1 2/6] of/device: Don't back devices DMA with IOMMU if that's undesired by driver Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 3/6] drm/tegra: Avoid implicit DMA backing with IOMMU Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 4/6] gpu: host1x: " Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 6/6] Revert "drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping" Dmitry Osipenko
2018-07-26 23:16 ` [RFC PATCH v1 5/6] drm/nouveau: tegra: Universally avoid implicit DMA backing with IOMMU Dmitry Osipenko
2018-07-27 8:25 ` Joerg Roedel [this message]
2018-07-27 9:03 ` [RFC PATCH v1 0/6] Resolve unwanted " Will Deacon
[not found] ` <20180727090328.GH28088-5wv7dgnIgG8@public.gmane.org>
2018-07-27 14:10 ` Dmitry Osipenko
2018-07-27 14:20 ` Joerg Roedel
2018-07-27 17:13 ` Rob Herring
2018-07-27 18:31 ` Joerg Roedel
[not found] ` <20180727183134.GD6738-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2018-07-27 20:02 ` Dmitry Osipenko
2018-07-27 16:02 ` Robin Murphy
[not found] ` <daadd395-dcb7-9505-f171-0fcc28570301-5wv7dgnIgG8@public.gmane.org>
2018-07-27 17:03 ` Jordan Crouse
[not found] ` <20180727170326.GA21283-9PYrDHPZ2Orvke4nUoYGnHL1okKdlPRT@public.gmane.org>
2018-07-27 17:16 ` Dmitry Osipenko
2018-07-28 11:40 ` Dmitry Osipenko
2018-08-02 18:24 ` Dmitry Osipenko
2018-08-03 15:43 ` Robin Murphy
2018-08-03 17:00 ` Jordan Crouse
2018-08-15 19:56 ` Dmitry Osipenko
2018-08-16 17:23 ` Robin Murphy
[not found] ` <afecce46-96d2-9688-30b4-0a3f17a651d3-5wv7dgnIgG8@public.gmane.org>
2018-09-20 17:09 ` Dmitry Osipenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180727082512.lpvmeuvxnw3mpeym@8bytes.org \
--to=joro@8bytes.org \
--cc=bskeggs@redhat.com \
--cc=catalin.marinas@arm.com \
--cc=cyndis@kapsi.fi \
--cc=devicetree@vger.kernel.org \
--cc=digetx@gmail.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=frowand.list@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jonathanh@nvidia.com \
--cc=kwizart@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=nouveau@lists.freedesktop.org \
--cc=rafael@kernel.org \
--cc=robh+dt@kernel.org \
--cc=thierry.reding@gmail.com \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).