From: "Joakim Tjernlund" <Joakim.Tjernlund@lumentis.se>
To: "Dan Malek" <dan@embeddededge.com>,
"Stephan Linke" <Stephan.Linke@epygi.de>
Cc: "Linuxppc-Embedded" <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: question on howto use invalidate_dcache_range
Date: Thu, 13 Mar 2003 18:54:38 +0100 [thread overview]
Message-ID: <004501c2e989$a10a66c0$020120b0@jockeXP> (raw)
In-Reply-To: 3E70B17E.9090507@embeddededge.com
>
> Stephan Linke wrote:
>
> > After all is it realy neccessary to use invalidate_dcache range before giving the transmit buffer to the DMA?
>
> The logically correct cache operation is to invalidate an incoming buffer
> after the DMA has completed
Yes, but you still need to invalidate the buffer before also or invalidate it when the buffer is freed which
may be possible if you are using your own buffer mgmt.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-03-13 17:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 11:20 question on howto use invalidate_dcache_range Stephan Linke
2003-03-13 7:40 ` Joakim Tjernlund
2003-03-13 11:00 ` Stephan Linke
2003-03-13 13:24 ` Joakim Tjernlund
2003-03-13 15:04 ` Stephan Linke
2003-03-13 16:27 ` Dan Malek
2003-03-13 17:54 ` Joakim Tjernlund [this message]
2003-03-13 18:06 ` Dan Malek
2003-03-13 18:19 ` Roland Dreier
2003-03-13 18:39 ` Dan Malek
2003-03-13 19:09 ` Roland Dreier
2003-03-13 21:54 ` Joakim Tjernlund
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='004501c2e989$a10a66c0$020120b0@jockeXP' \
--to=joakim.tjernlund@lumentis.se \
--cc=Stephan.Linke@epygi.de \
--cc=dan@embeddededge.com \
--cc=linuxppc-embedded@lists.linuxppc.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).