From: Scott Wood <scottwood@freescale.com>
To: suresh suresh <sureshtang@gmail.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Kmalloc returns which address
Date: Mon, 16 Jul 2007 10:46:36 -0500 [thread overview]
Message-ID: <469B92DC.50609@freescale.com> (raw)
In-Reply-To: <e5eb93010707160659m6a7d0b02p623542739d28ab29@mail.gmail.com>
suresh suresh wrote:
> I want know the address return by kmalloc function? is it physical address
> or kernel virtual address.
Kernel virtual.
> For Tx and Rx, hardware uses buffers, so I have to allocate buffers and
> pass
> the pointer to hardware. Can I pass the pointer returned kmalloc? or I
> should convert it into physical address?
You need to convert it; read Documentation/DMA-mapping.txt.
-Scott
next prev parent reply other threads:[~2007-07-16 15:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 13:59 Kmalloc returns which address suresh suresh
2007-07-16 15:46 ` Scott Wood [this message]
2007-07-23 3:47 ` Misbah khan
2007-07-23 18:35 ` Scott Wood
2007-07-24 7:03 ` Misbah khan
2007-07-20 10:52 ` Misbah khan
2007-07-20 16:58 ` Scott Wood
2007-07-20 12:13 ` Alessandro Rubini
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=469B92DC.50609@freescale.com \
--to=scottwood@freescale.com \
--cc=linuxppc-embedded@ozlabs.org \
--cc=sureshtang@gmail.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).