+/** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */
+#define RTE_PCI_DRV_NEED_MAPPING 0x0001
+/** Device driver supports link state interrupt */
+#define RTE_PCI_DRV_INTR_LSC 0x0008
+
+/**
+ * A structure describing a PCI mapping.
+ */
+struct pci_map {
+ void *addr;
+ char *path;
+ uint64_t offset;
+ uint64_t size;
+ uint64_t phaddr;
+};
+
+/**
+ * A structure describing a mapped PCI resource.
+ * For multi-process we need to reproduce all PCI mappings in secondary
+ * processes, so save them in a tailq.
+ */
+struct mapped_pci_resource {
+ TAILQ_ENTRY(mapped_pci_resource) next;
+
+ struct rte_pci_addr pci_addr;
+ char path[PATH_MAX];
+ int nb_maps;
+ struct pci_map maps[PCI_MAX_RESOURCE];
+};
+
+/** mapped pci device list */
+TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
+
+/**< Internal use only - Macro used by pci addr parsing functions **/
+#define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
+do { \
+ unsigned long val; \
+ char *end; \
+ errno = 0; \
+ val = strtoul((in), &end, 16); \
+ if (errno != 0 || end[0] != (dlm) || val > (lim)) \
+ return -EINVAL; \
+ (fd) = (typeof (fd))val; \
+ (in) = end + 1; \
+} while(0)
+
+/**
+ * Utility function to produce a PCI Bus-Device-Function value
+ * given a string representation. Assumes that the BDF is provided without
+ * a domain prefix (i.e. domain returned is always 0)
+ *
+ * @param input
+ * The input string to be parsed. Should have the format XX:XX.X
+ * @param dev_addr
+ * The PCI Bus-Device-Function address to be returned. Domain will always be
+ * returned as 0
+ * @return
+ * 0 on success, negative on error.
+ */
+static inline int
+eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
+{
+ dev_addr->domain = 0;
+ GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
+ GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
+ GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+ return 0;
+}
+
+/**
+ * Utility function to produce a PCI Bus-Device-Function value
+ * given a string representation. Assumes that the BDF is provided including
+ * a domain prefix.
+ *
+ * @param input
+ * The input string to be parsed. Should have the format XXXX:XX:XX.X
+ * @param dev_addr
+ * The PCI Bus-Device-Function address to be returned
+ * @return
+ * 0 on success, negative on error.
+ */
+static inline int
+eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
+{
+ GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
+ GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
+ GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
+ GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+ return 0;
+}
+#undef GET_PCIADDR_FIELD
+
+/**
+ * Utility function to write a pci device name, this device name can later be
+ * used to retrieve the corresponding rte_pci_addr using eal_parse_pci_*
+ * BDF helpers.
+ *
+ * @param addr
+ * The PCI Bus-Device-Function address
+ * @param output
+ * The output buffer string
+ * @param size
+ * The output buffer size
+ */
+static inline void
+rte_eal_pci_device_name(const struct rte_pci_addr *addr,
+ char *output, size_t size)
+{
+ RTE_VERIFY(size >= PCI_PRI_STR_SIZE);
+ RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT,
+ addr->domain, addr->bus,
+ addr->devid, addr->function) >= 0);
+}
+
+/* Compare two PCI device addresses. */
+/**
+ * Utility function to compare two PCI device addresses.
+ *
+ * @param addr
+ * The PCI Bus-Device-Function address to compare
+ * @param addr2
+ * The PCI Bus-Device-Function address to compare
+ * @return
+ * 0 on equal PCI address.
+ * Positive on addr is greater than addr2.
+ * Negative on addr is less than addr2, or error.
+ */
+static inline int
+rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
+ const struct rte_pci_addr *addr2)
+{
+ uint64_t dev_addr, dev_addr2;
+
+ if ((addr == NULL) || (addr2 == NULL))
+ return -1;
+
+ dev_addr = (addr->domain << 24) | (addr->bus << 16) |
+ (addr->devid << 8) | addr->function;
+ dev_addr2 = (addr2->domain << 24) | (addr2->bus << 16) |
+ (addr2->devid << 8) | addr2->function;
+
+ if (dev_addr > dev_addr2)
+ return 1;
+ else if (dev_addr < dev_addr2)
+ return -1;
+ else
+ return 0;
+}
+
+/**
+ * Scan the content of the PCI bus, and the devices in the devices
+ * list
+ *
+ * @return
+ * 0 on success, negative on error
+ */
+int rte_eal_pci_scan(void);