From: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Jon Hunter <jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Vinod Koul <vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Laxman Dewangan
<ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Cc: dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v2 2/3] dmaengine: Add driver for NVIDIA Tegra AHB DMA controller
Date: Fri, 6 Oct 2017 21:02:59 +0300 [thread overview]
Message-ID: <b883f022-dac8-2e83-38af-b69810a4a8de@gmail.com> (raw)
In-Reply-To: <d4885545-6af1-b240-a197-1ed530cc4172-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
On 06.10.2017 18:50, Jon Hunter wrote:
>
> On 06/10/17 16:26, Dmitry Osipenko wrote:
>> On 06.10.2017 16:11, Jon Hunter wrote:
>>>
>>> On 04/10/17 00:58, Dmitry Osipenko wrote:
>>>> AHB DMA controller presents on Tegra20/30 SoC's, it supports transfers
>>>> memory <-> AHB bus peripherals as well as mem-to-mem transfers. Driver
>>>> doesn't yet implement transfers larger than 64K and scatter-gather
>>>> transfers that have NENT > 1, HW doesn't have native support for these
>>>> cases, mem-to-mem isn't implemented as well.
>>>
>>> The APB DMA does not have h/w support for sg-transfers either, but
>>> transfer request are placed on a list. Can we not do the same for AHB?
>>>
>>
>> We can, but I'm not going to implement it without a use-case. It could be done
>> later if needed.
>
> OK, that's fine, maybe state that above.
>
It just occurred to me that you are meaning to state that there is no use-case,
I'll mention it in the commit message.
next prev parent reply other threads:[~2017-10-06 18:02 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-03 23:58 [PATCH v2 0/3] NVIDIA Tegra AHB DMA controller driver Dmitry Osipenko
[not found] ` <cover.1507073384.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03 23:58 ` [PATCH v2 1/3] dt-bindings: Add DT binding for NVIDIA Tegra AHB DMA controller Dmitry Osipenko
[not found] ` <ecf2e8248dc7b88e5fd04bebe8071027f538a40d.1507073384.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-06 9:10 ` Jon Hunter
[not found] ` <542f69a2-5d70-47ae-8c04-2089b50cad30-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-06 11:40 ` Dmitry Osipenko
2017-10-06 13:56 ` Jon Hunter
[not found] ` <03810975-7eb0-aa79-964f-dcbcbaf9e4b4-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-06 15:27 ` Dmitry Osipenko
2017-10-03 23:58 ` [PATCH v2 2/3] dmaengine: Add driver " Dmitry Osipenko
[not found] ` <9ef93a0054a6a2e27b72e5bfeebe81e5ab11a224.1507073384.git.digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-06 13:11 ` Jon Hunter
[not found] ` <58f8c049-4408-d6a7-7452-f5be8041b7b5-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-06 15:26 ` Dmitry Osipenko
[not found] ` <72374a74-f6bd-256f-73c0-fa970a2e1576-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-06 15:50 ` Jon Hunter
[not found] ` <d4885545-6af1-b240-a197-1ed530cc4172-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-06 17:23 ` Dmitry Osipenko
[not found] ` <fc684b85-b4a7-c68d-613c-adbe0b154c6c-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-06 19:25 ` Dmitry Osipenko
2017-10-09 9:51 ` Jon Hunter
[not found] ` <dd49d752-039a-464d-1638-08323d637f5a-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-09 13:28 ` Dmitry Osipenko
2017-10-06 18:02 ` Dmitry Osipenko [this message]
2017-10-06 19:11 ` Dmitry Osipenko
[not found] ` <CAOQPn8s50+XyGr2s3sQh5+qhek2n0A=3CT49YNJyftLv1pP=vg@mail.gmail.com>
[not found] ` <CAOQPn8s50+XyGr2s3sQh5+qhek2n0A=3CT49YNJyftLv1pP=vg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-10-07 12:43 ` Dmitry Osipenko
[not found] ` <7c44b44b-ddfa-ad67-cf18-ce182e424ea5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-07 14:42 ` Eric Pilmore (GigaIO)
[not found] ` <DDFFA839-AC6C-45AE-9536-5C68BC2DE82A-Op3I1peydIbQT0dZR+AlfA@public.gmane.org>
2017-10-07 15:50 ` Dmitry Osipenko
[not found] ` <35dd2e3a-1f97-b82e-4763-a9d064761bc8-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-09 9:43 ` Jon Hunter
[not found] ` <b66c06cb-a63e-b13d-02f4-f7bacfd35112-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-10-09 10:39 ` Vinod Koul
2017-10-09 11:43 ` Dmitry Osipenko
2017-10-03 23:58 ` [PATCH v2 3/3] ARM: dts: tegra: Add AHB DMA controller nodes Dmitry Osipenko
2017-12-13 3:41 ` [PATCH v2 0/3] NVIDIA Tegra AHB DMA controller driver 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=b883f022-dac8-2e83-38af-b69810a4a8de@gmail.com \
--to=digetx-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org \
--cc=ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org \
--cc=linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org \
--cc=thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
/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).