From: Rolf Eike Beer <eike-kernel@sf-tec.de>
To: "yogeshwar sonawane" <yogyas@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Accessing 64-bit BARs
Date: Thu, 4 Oct 2007 14:40:10 +0200 [thread overview]
Message-ID: <200710041440.15464.eike-kernel@sf-tec.de> (raw)
In-Reply-To: <b681c62b0710040153w5b4779fat1ccc7fa3e5775c2c@mail.gmail.com>
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Am Donnerstag, 4. Oktober 2007 schrieb yogeshwar sonawane:
> Hello all,
>
> For accessing memory-mapped 64bit-BAR regions of a PCI card, the
> respective BAR regions has to be made accessible to the kernel using
> ioremap() function. Then readl()/writel() can be used on the address
> returned by ioremap().
You should use pci_iomap() to get an access pointer to the BAR. After this you
can access the memory with ioread*() and iowrite*(). See "man pci_iomap(9)"
if you build kernel manpages.
Greetings,
Eike
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next prev parent reply other threads:[~2007-10-04 12:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-04 8:53 Accessing 64-bit BARs yogeshwar sonawane
2007-10-04 12:40 ` Rolf Eike Beer [this message]
2007-10-04 15:26 ` Roland Dreier
2007-10-05 3:57 ` yogeshwar sonawane
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