These flags define mapping between PCI config space and system resources.
So non-sysfs/procfs providers can fill these flags too.
/* I/O resource flags, compatible with <include/linux/ioport.h> */
+#define PCI_IORESOURCE_TYPE_BITS 0x00001f00
+#define PCI_IORESOURCE_IO 0x00000100
+#define PCI_IORESOURCE_MEM 0x00000200
+#define PCI_IORESOURCE_PREFETCH 0x00002000
+#define PCI_IORESOURCE_MEM_64 0x00100000
+#define PCI_IORESOURCE_IO_16BIT_ADDR (1<<0)
#define PCI_IORESOURCE_PCI_EA_BEI (1<<5)