From: "hch@lst.de" <hch@lst.de>
To: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: "hch@lst.de" <hch@lst.de>, "joro@8bytes.org" <joro@8bytes.org>,
Ioana Ciocoi Radulescu <ruxandra.radulescu@nxp.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Leo Li <leoyang.li@nxp.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
Diana Madalina Craciun <diana.craciun@nxp.com>,
"davem@davemloft.net" <davem@davemloft.net>,
Madalin Bucur <madalin.bucur@nxp.com>
Subject: Re: [PATCH v2 1/3] dma-mapping: introduce new dma unmap and sync api variants
Date: Mon, 28 Oct 2019 13:38:05 +0100 [thread overview]
Message-ID: <20191028123805.GA25160@lst.de> (raw)
In-Reply-To: <20191024124130.16871-2-laurentiu.tudor@nxp.com>
On Thu, Oct 24, 2019 at 12:41:41PM +0000, Laurentiu Tudor wrote:
> From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
>
> Introduce a few new dma unmap and sync variants that, on top of the
> original variants, return the virtual address corresponding to the
> input dma address.
> In order to implement this a new dma map op is added and used:
> void *get_virt_addr(dev, dma_handle);
> It does the actual conversion of an input dma address to the output
> virtual address.
We'll definitively need an implementation for dma-direct at least as
well. Also as said previously we need a dma_can_unmap_by_dma_addr()
or similar helper that tells the driver beforehand if this works, so
that the driver can either use a sub-optimal workaround or fail the
probe if this functionality isn't implemented.
next prev parent reply other threads:[~2019-10-28 12:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 12:41 [PATCH v2 0/3] dma-mapping: introduce new dma unmap and sync variants Laurentiu Tudor
2019-10-24 12:41 ` [PATCH v2 1/3] dma-mapping: introduce new dma unmap and sync api variants Laurentiu Tudor
2019-10-28 12:38 ` hch [this message]
2019-10-29 7:05 ` Laurentiu Tudor
2019-10-28 13:42 ` Robin Murphy
2019-11-06 11:32 ` Laurentiu Tudor
2019-11-07 12:30 ` Laurentiu Tudor
2019-10-30 9:48 ` kbuild test robot
2019-10-24 12:41 ` [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr Laurentiu Tudor
2019-10-28 13:52 ` Robin Murphy
2019-10-24 12:41 ` [PATCH v2 3/3] dpaa2_eth: use new unmap and sync dma api variants Laurentiu Tudor
2019-10-25 16:12 ` Jonathan Lemon
2019-10-28 10:55 ` Laurentiu Tudor
2019-10-28 11:38 ` hch
2019-11-06 11:17 ` Laurentiu Tudor
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=20191028123805.GA25160@lst.de \
--to=hch@lst.de \
--cc=davem@davemloft.net \
--cc=diana.craciun@nxp.com \
--cc=ioana.ciornei@nxp.com \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=laurentiu.tudor@nxp.com \
--cc=leoyang.li@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=madalin.bucur@nxp.com \
--cc=netdev@vger.kernel.org \
--cc=robin.murphy@arm.com \
--cc=ruxandra.radulescu@nxp.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).