All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Albrecht Dreß" <albrecht.dress@arcor.de>
To: Linux PPC Development <linuxppc-dev@ozlabs.org>
Subject: [5200B/slightly ot] MPC52xx LPB FIFO memory requirements
Date: Wed, 09 Mar 2011 21:45:51 +0100	[thread overview]
Message-ID: <1299703559.1817.3@antares> (raw)

[-- Attachment #1: Type: text/plain, Size: 439 bytes --]

Hi all,

I have a slightly off-topic question regarding the use of mpc52xx_lpbfifo_submit() & friends...

In struct mpc52xx_lpbfifo_request, the element 'data' (with address 'data_phys') is apparently the chunk of data which is transferred through bestcomm, right?  Dumb question: has this chunk of memory to be DMA mem (i.e. allocated via dma_alloc_coherent), or is "normal" kernel memory (kmalloc) sufficient?

Thanks,
Albrecht.

[-- Attachment #2: Type: application/pgp-signature, Size: 190 bytes --]

                 reply	other threads:[~2011-03-09 20:46 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=1299703559.1817.3@antares \
    --to=albrecht.dress@arcor.de \
    --cc=linuxppc-dev@ozlabs.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.