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Date:      Tue, 31 Jul 2012 09:51:12 -0400
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-net@freebsd.org
Cc:        Venkat Duvvuru <venkatduvvuru.ml@gmail.com>
Subject:   Re: PCI BAR mmap
Message-ID:  <201207310951.12251.jhb@freebsd.org>
In-Reply-To: <CAGdae7a0xuKnFaeOTUykLcUKuCf17TTuYD_MuG4t7FKbHNoqAg@mail.gmail.com>
References:  <CAGdae7a0xuKnFaeOTUykLcUKuCf17TTuYD_MuG4t7FKbHNoqAg@mail.gmail.com>

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On Tuesday, July 31, 2012 8:48:00 am Venkat Duvvuru wrote:
> Hi,
> How to mmap PCI  BARs from userland in freebsd?
> In Linux the PCI BAR appears as a file in the sysfs file system. How can I
> access PCI BAR as a file in freebsd to mmap it?

You can export a BAR via a d_mmap() method from a cdevsw device you create in 
your driver.

-- 
John Baldwin



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