Tejun Heo wrote: > > I forgot about the PCI resource fix up done for legacy hosts. I think > making the host legacy is the best way to take here considering that - > no change for both ide and libata, just some fix up in platform code. > ATA native/legacy thing doesn't mean much. It's just how the resources > are allocated. Is there any specific reason to use native mode?
Yes, legacy mode means there are several "io ports" mapped into the 0 thru 0x1000 addresses. This might work in Linux, granted, but I am not sure it is a good idea in the first place. Mapping io ports to anywhere but the PCI io space is just an ugly solution. The ATA native/legacy thing means a lot, as there is no "legacy" on PowerPC. It's a PCI device, so we should try and fix up it's actions as a PCI device, however, making it truly conform will break any "not entirely compatible" drivers break (via8cxxx being the biggest culprit). Therefore no firmware fixes for thee. I do think we can knock it into full PCI native mode from the platform fixups though, as a kernel option. Old drivers will work fine, old kernels will work fine, and optionally old behaviour can be left, but anyone building a new kernel with pata_via and no via8cxxx (i.e. all new distributions) can enable the new behaviour. Does that sound okay? No libata-level resource fixups need to be done for a real PCI device, do they? I think we should just coerce the controller to use a single interrupt and disable ISA interrupt steering, fix the class code, and see if libata handles it. -- Matt Sealey <[EMAIL PROTECTED]> Genesi, Manager, Developer Relations - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
