On Fri, 14 Nov 2014, Jiang Liu wrote: > On 2014/11/14 9:31, Thomas Gleixner wrote: > > On Fri, 14 Nov 2014, Yijing Wang wrote: > > > > Could you please use a mail client which does proper line wraps or > > configure yours to do so? > > > >> Associate the irq domain and PCI bus is not necessary, because all > >> PCI buses under same host bridge always share same MSI chip/irq > >> domain, we only need associate them and pci host bridge. > >> > >> I'm refactoring the pci_host_bridge, make it be a generic one, rip > >> out of the pci root bus creation, so we could put the irq domain and > >> pci domain etc.. in it. Finally, we could eliminate lots platform > >> arch functions. I will post it out within one week. > > > > That's a completely orthogonal problem. From the MSI/interrupt > > handling POV it does not matter at all where that information is > > stored. All we care about is that it is retrievable via the (pci) > > device which tries to setup MSI[X]. > > > > So we can store/retrieve it via generic functions into/from whatever > > is available right now. If the irq side has generic interfaces to do > > so then this wont conflict with your decisions to change the final > > storage point because all it takes is to tweak the storage/retrieve > > functions. > > > > So all we need at the moment is an agreed on way to store/retrieve > > that information which is based on the current shared infrastructure, > > aka. Linus tree. If we can utilize that you are completely free to > > change the association mechanism underneath. > Hi Thomas, > So we need something like: > struct msi_chip *pci_get_msi_chip(struct pci_dev *); > or: > struct irq_domain *pci_get_msi_domain(struct pci_dev *); > > BTW, there's a conflict when merging tip/irq/irqdomain into > tip/x86/apic. It's my first time to deal with merging conflicts, > what's the preferred way? Is it working like this? > 1) I merge the two branch > 2) I rebase my x86 irqdomain patch sets and send them to you > 3) You merge the two branch and apply my patch set. When we have the generic parts sorted out, i'll make the irq/irqdomain branch official and immutable and then merge it into x86/apic fix the conflicts and add the x86 specific stuff on top. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
