Date: Mon, 5 Jul 2010 13:02:55 -0700 From: Christopher Bowman <crb@chrisbowman.com> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: freebsd-hackers@freebsd.org Subject: Re: PCI Express and drivers Message-ID: <AANLkTikPuogCaewnIvv_2ElCVrBP15oD5lFW6SfpmQ9s@mail.gmail.com> In-Reply-To: <DEC04783-951C-4D47-9786-F4B435026F77@gsoft.com.au> 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>
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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? Thanks Christopher On Sat, Jun 26, 2010 at 8:11 AM, Daniel O'Connor <doconnor@gsoft.com.au>wrote: > > On 26/06/2010, at 14:50, Christopher Bowman wrote: > >> PS what board are you using? :) > >> > > Cool, that looks like what I am looking for. I'll go and read up on > it, thanks very much. I am using the Xilinx SP605 > http://www.xilinx.com/products/devkits/EK-S6-SP605-G.htm > > perfect for playing with hardware for a frame buffer device or graphics > device. It comes with a full license for the synthesis and PCIe IP for the > device on that board which is a great deal. > > Ahh, it does look like a fun toy :) > > -- > 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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