From: David Marchand <david.marchand@redhat.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>
Cc: dev <dev@dpdk.org>, Bruce Richardson <bruce.richardson@intel.com>,
Ray Kinsella <mdr@ashroe.eu>,
Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>,
Narcisa Ana Maria Vasile <navasile@linux.microsoft.com>,
Dmitry Malloy <dmitrym@microsoft.com>,
Pallavi Kadam <pallavi.kadam@intel.com>,
Xuan Ding <xuan.ding@intel.com>,
"Yigit, Ferruh" <ferruh.yigit@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2 1/1] vfio: add page-by-page mapping API
Date: Thu, 2 Jun 2022 10:23:07 +0200 [thread overview]
Message-ID: <CAJFAV8whkYmE7n-H4usUdYqq0FSbQ5x=Nd9fQzNzAQh4WzCEow@mail.gmail.com> (raw)
In-Reply-To: <ee273878-c6dd-768a-0bba-250e578ed3c4@intel.com>
Hello Anatoly,
On Tue, Nov 2, 2021 at 4:54 PM Burakov, Anatoly
<anatoly.burakov@intel.com> wrote:
>
> On 28-Oct-21 3:09 PM, Anatoly Burakov wrote:
> > Currently, there is no way to map memory for DMA in a way that allows
> > unmapping it partially later, because some IOMMU's do not support
> > partial unmapping. There is a workaround of mapping all of these
> > segments separately, but this is inconvenient and silly, so this
> > commit adds a proper API that does it.
> >
> > This commit relies on earlier infrastructure that was built out to
> > support "chunking", as the concept of "chunks" is essentially the same
> > as page size.
> >
> > Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > ---
> >
> > Notes:
> > v2:
> > - Added checks for page alignment of supplied values
> > - Added rte_errno values (similar to patch 103165 [1])
> >
> > [1] http://patches.dpdk.org/project/dpdk/patch/e8c5e7ba089e2283c3cd67e4529e52fe49390eb9.1635428963.git.anatoly.burakov@intel.com/
>
> I think this API also needs VA and IOVA addresses in an array, so that
> it's possible to map IOVA-discontiguous segments. This is too late for
> this release, so let's postpone it till 22.02.
It seems this patch fell through the cracks.
Any update?
Thanks.
--
David Marchand
next prev parent reply other threads:[~2022-06-02 8:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-10 11:27 [dpdk-dev] [PATCH v1 " Anatoly Burakov
2021-09-10 12:31 ` Burakov, Anatoly
2021-09-29 10:18 ` Burakov, Anatoly
2021-10-28 8:18 ` David Marchand
2021-10-28 13:00 ` Burakov, Anatoly
2021-10-28 14:09 ` [dpdk-dev] [PATCH v2 " Anatoly Burakov
2021-11-02 15:16 ` Burakov, Anatoly
2022-06-02 8:23 ` David Marchand [this message]
2023-07-03 23:48 ` Stephen Hemminger
2023-07-04 12:51 ` Burakov, Anatoly
2022-06-02 9:14 ` Ray Kinsella
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