On Sun, 2 Dec 2007 13:32:28 +0100 Stefan Roese <[EMAIL PROTECTED]> wrote:
> Hi Ben, > > On Friday 30 November 2007, Benjamin Herrenschmidt wrote: > > This adds to the previous 2 patches the support for the 4xx PCI Express > > cells as found in the 440SPe revA, revB and 405EX. > > > > Unfortunately, due to significant differences between these, and other > > interesting "features" of those pieces of HW, the code isn't as simple > > as it is for PCI and PCI-X and some of the functions differ significantly > > between the 3 implementations. Thus, not only this code can only support > > those 3 implementations for now and will refuse to operate on any other, > > but there are added ifdef's to avoid the bloat of building a fairly large > > amount of code on platforms that don't need it. > > > > Also, this code currently only supports fully initializing root complex > > nodes, not endpoint. Some more code will have to be lifted from the > > arch/ppc implementation to add the endpoint support, though it's mostly > > differences in memory mapping, and the question on how to represent > > endpoint mode PCI in the device-tree is thus open. > > > > Signed-off-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > > --- > > > > 440SPeA is untested, 440SPeB is slightly tested (with a sky2 network card > > on port 0 only for now) and 405EX is untested. > > As already mentioned I'm experiencing some problems with this current > version. > At least what's available in Josh's 2.6.25-candidates branch. The kernel > crashes in the first ppc4xx_pciex_read_config() call upon (after I fixed the > small problem mentioned further down below): > > BUG_ON(hose != port->hose); > > So before digging into this deeper, I wanted to check if you don't have a > slightly "better" version which passed your tests with the sky2 PCIe card. These should be the latest versions that Ben sent out. I plan on applying newer versions to that branch as they come out, which means the git branch will probably reset often for a bit. I have some other patches I want to pull into there as well anyway. josh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
