> Does it mean that pci is supposed be always 64 bit wide? > And there is no option to have just 32bit values. I certainly believe that all PCIe (not PCI) transfers are nominally multiples of 64bit data. There are (effectively) 8 byte-lane enables to allow partial word transfers (I'm not sure whether disjoint subwords are valid). Some PCIe slave->32bit bus bridges always do two slave cycles. Even though, for a 32bit word transfer, one of them ends up having no byte enables asserted. David -- 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
