On Tue, 11 Aug 2009 16:17:46 -0700 Jesse Barnes <jesse.bar...@intel.com> wrote:
> On Tue, 11 Aug 2009 15:52:06 +1000 > Dave Airlie <airl...@gmail.com> wrote: > > > From: Tiago Vignatti <tiago.vigna...@nokia.com> > > > > Background: > > Graphic devices are accessed through ranges in I/O or memory space. > > While most modern devices allow relocation of such ranges, some > > "Legacy" VGA devices implemented on PCI will typically have the same > > "hard-decoded" addresses as they did on ISA. For more details see > > "PCI Bus Binding to IEEE Std 1275-1994 Standard for Boot > > (Initialization Configuration) Firmware Revision 2.1" Section 7, > > Legacy Devices. > > > > The Resource Access Control (RAC) module inside the X server > > currently does the task of arbitration when more than one legacy > > device co-exists on the same machine. But the problem happens when > > these devices are trying to be accessed by different userspace > > clients (e.g. two server in parallel). Their address assignments > > conflict. Therefore an arbitration scheme _outside_ of the X server > > is needed to control the sharing of these resources. This document > > introduces the operation of the VGA arbiter implemented for Linux > > kernel. > > > > Signed-off-by: Tiago Vignatti <tiago.vigna...@nokia.com> > > Signed-off-by: Dave Airlie <airl...@redhat.com> > > Ok, applied this to my linux-next branch, but I'd like to get Ben's > s-o-b before pushing it to Linus. Oh yeah, and we should get the documentation merged too. I can handle that or you can send it to Randy. Tiago? -- Jesse Barnes, Intel Open Source Technology Center ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
