Hi, Thanks so much for the quick reply! This is really helpful. I will try to do the same and would get back if i face any difficulties. Thanks again! Best Regards, Bob On Wed, Sep 24, 2014 at 11:12 PM, Sunil Kovvuri <sunil.kovvuri@xxxxxxxxx> wrote: > If you anyway want to simulate VF functionality in PF driver itself, > i am not sure why do you need to access VF's config space from PF. > > FYI, VF's BAR(MMIO) are not used, MMIO regions are carved using > VF BARs in PF's SRIOV config space. > > VFx BAR0 = PF SRIOV BAR0 + BAR_SIZE * x (VF_NUMBER); > > For accessing VF's MMIO regions you can try mapping > PF's pci_dev->resource[PCI_IOV_RESOURCES] and using above formula > to get exact MMIO base for corresponding VF. > > Regards, > Sunil. > > On Wed, Sep 24, 2014 at 10:10 PM, Bob Biloxi <iambobbiloxi@xxxxxxxxx> wrote: >> Hi, >> >> I am new to writing pci sriov drivers. So i could use your help and >> expertise here.... >> >> As I understand once sriov is enabled, the PF driver can access the >> PF(Physical Function) configuration space, BAR(MMIO) etc and the VF >> driver can access the VF(Virtual Function) configuration space, >> BAR(MMIO)... >> >> Is it possible for a PF driver to access the VF config space, BAR(MMIO)? >> If yes, can you please point me as to what needs to be done in order >> to do it(existing driver sources will be really helpful). >> >> Now as to why this requirement is if the PF driver is ready and the VF >> driver is still under development, and I want to simulate the VF >> functionality from PF itself. >> >> It would be of immense help to me if anyone can help me understand my >> aforementioned query. >> >> >> Thanks a lot!!! >> >> >> Best Regards, >> Bob >> -- >> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
