On Wed, Sep 23, 2015 at 04:26:56PM -0700, Yinghai Lu wrote: > On Wed, Sep 23, 2015 at 3:27 PM, Sean O. Stalley <sean.stalley@xxxxxxxxx> wrote: > > PCI Enhanced Allocation is a new method of allocating MMIO & IO > > resources for PCI devices & bridges. It can be used instead > > of the traditional PCI method of using BARs. > > > > EA entries are hardware-initialized to a fixed address. > > Unlike BARs, regions described by EA are cannot be moved. > > Because of this, only devices which are permanently connected to > > the PCI bus can use EA. A removable PCI card must not use EA. > > As it is fixed, can you put IORESOURCE_PCI_FIXED in the res->flags? > > Thanks > > Yinghai IORESOURCE_PCI_FIXED is set in pci_ea_set_flags(): +static unsigned long pci_ea_set_flags(struct pci_dev *dev, u8 prop) +{ + unsigned long flags = IORESOURCE_PCI_FIXED; + + Which is called in pci_ea_read(), and passed to res->flags (if there aren't any errors): + + /* Try to use primary properties, otherwise fall back to secondary */ + flags = pci_ea_set_flags(dev, PCI_EA_PP(dw0)); + if (!flags) + flags = pci_ea_set_flags(dev, PCI_EA_SP(dw0)); + ... + res->flags = flags; -Sean -- 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