linux-kernel - Re: Accessing 64-bit BARs

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Message-ID: <adasl4qdhpn.fsf@cisco.com>
Date:	Thu, 04 Oct 2007 08:26:12 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Rolf Eike Beer <eike-kernel@...tec.de>
Cc:	"yogeshwar sonawane" <yogyas@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Accessing 64-bit BARs

 > 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.

That works fine, but ioremap() and readl()/writel() is also perfectly
fine for regions that you know are always MMIO.

 - R.
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