Date: Tue, 6 Jul 2010 08:25:17 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Christopher Bowman <crb@chrisbowman.com> Cc: freebsd-hackers@freebsd.org Subject: Re: PCI Express and drivers Message-ID: <824CFAF1-A965-4848-A13D-48DA3724EBD1@gsoft.com.au> In-Reply-To: <AANLkTikPuogCaewnIvv_2ElCVrBP15oD5lFW6SfpmQ9s@mail.gmail.com> References: <AANLkTinMvJnvsmE6NvOKjtcAVn6JEl-kB-AjdWMpXpZd@mail.gmail.com> <02DA6157-87CE-47E5-91D0-ED014FB88AD0@gsoft.com.au> <AANLkTimK3OeOQzw__wxPPG2DY8gXTggep7kl3oF8vKUl@mail.gmail.com> <DEC04783-951C-4D47-9786-F4B435026F77@gsoft.com.au> <AANLkTikPuogCaewnIvv_2ElCVrBP15oD5lFW6SfpmQ9s@mail.gmail.com>
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On 06/07/2010, at 5:32, Christopher Bowman wrote: > If I could, let me ask another question. My device could potential = have up to 6 BARs, that would be mapped into user space. Should I = simply bundle them together in my driver into one contiguous space or = should I make the user perform multiple mmap calls? If I go the = multiple mmap route, how do I match a mmap call to a particular BAR? Do = I use the size of the allocation? Yes, I think you just key off the requested address in the mmap() call. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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