On Sun, 2013-04-07 at 19:19 +0000, zhengfei wrote: > Hi, > > I'm writing a driver for a SR-IOV device on the PCI bus. My architecture is > a 64-bit X86 of intel Sandy bridge. > > In my device driver, I want to configure the device to transfer data to/from > X86.I get the the device BAR MMIO base address with the command "lspci -s > 04:00.03 -xxx" in the guest os(kvm). > But after I ioremap() that MMIO base address,I failed to access the BAR MMIO > space in the guest os(kvm). > > Is there a function which show mapping between the real PCI address stored in > the BAR and the emulated address stored in the BAR? Is this a userspace driver or a kernel driver? I can't figure out why you would use lspci to get a static BAR address, then use ioremap() to map it. If it's a kernel driver, the sequence you want is something like: pci_enable_device pci_request_selected_regions pci_iomap Thanks, Alex -- 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
