From mboxrd@z Thu Jan  1 00:00:00 1970
From: daniel.redway85@gmail.com (Daniel Redway)
Date: Mon, 20 Jun 2011 10:48:36 +0300
Subject: request_mem_region
Message-ID: <BANLkTimOEovCf3CZPk_+WE1Uj1rQL9fu_Q@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hello

As I understand ioremap() maps and returns virtual address
for a given physical(bus) address associated with my PCI card.
That is cool and clear.


What is the purpose of request_mem_region()?
They both take physical address as a parameter, but do not return any
virt addresses.

1. What do they allocate/reserve and where?
2. Should I call reques_mem_region() before doing ioremap() or not?


thanks
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110620/4c757e98/attachment.html