+/* map a particular resource from a file */
+void *
+pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
+ int additional_flags)
+{
+ void *mapaddr;
+
+ /* Map the PCI memory resource of device */
+ mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
+ MAP_SHARED | additional_flags, fd, offset);
+ if (mapaddr == MAP_FAILED) {
+ RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
+ __func__, fd, requested_addr,
+ (unsigned long)size, (unsigned long)offset,
+ strerror(errno), mapaddr);
+ } else
+ RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
+
+ return mapaddr;
+}
+
+/* unmap a particular resource */
+void
+pci_unmap_resource(void *requested_addr, size_t size)
+{
+ if (requested_addr == NULL)
+ return;
+
+ /* Unmap the PCI memory resource of device */
+ if (munmap(requested_addr, size)) {
+ RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
+ __func__, requested_addr, (unsigned long)size,
+ strerror(errno));
+ } else
+ RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
+ requested_addr);
+}
+
+/*
+ * Match the PCI Driver and Device using the ID Table
+ *
+ * @param pci_drv
+ * PCI driver from which ID table would be extracted
+ * @param pci_dev
+ * PCI device to match against the driver
+ * @return
+ * 1 for successful match
+ * 0 for unsuccessful match
+ */
+static int
+rte_pci_match(const struct rte_pci_driver *pci_drv,
+ const struct rte_pci_device *pci_dev)
+{
+ const struct rte_pci_id *id_table;
+
+ for (id_table = pci_drv->id_table; id_table->vendor_id != 0;
+ id_table++) {
+ /* check if device's identifiers match the driver's ones */
+ if (id_table->vendor_id != pci_dev->id.vendor_id &&
+ id_table->vendor_id != PCI_ANY_ID)
+ continue;
+ if (id_table->device_id != pci_dev->id.device_id &&
+ id_table->device_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_vendor_id !=
+ pci_dev->id.subsystem_vendor_id &&
+ id_table->subsystem_vendor_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_device_id !=
+ pci_dev->id.subsystem_device_id &&
+ id_table->subsystem_device_id != PCI_ANY_ID)
+ continue;
+ if (id_table->class_id != pci_dev->id.class_id &&
+ id_table->class_id != RTE_CLASS_ANY_ID)
+ continue;
+
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * If vendor/device ID match, call the probe() function of the
+ * driver.
+ */
+static int
+rte_pci_probe_one_driver(struct rte_pci_driver *dr,
+ struct rte_pci_device *dev)
+{
+ int ret;
+ struct rte_pci_addr *loc;
+
+ if ((dr == NULL) || (dev == NULL))
+ return -EINVAL;
+
+ loc = &dev->addr;
+
+ /* The device is not blacklisted; Check if driver supports it */
+ if (!rte_pci_match(dr, dev))
+ /* Match of device and driver failed */
+ return 1;
+
+ RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+ loc->domain, loc->bus, loc->devid, loc->function,
+ dev->device.numa_node);
+
+ /* no initialization when blacklisted, return without error */
+ if (dev->device.devargs != NULL &&
+ dev->device.devargs->type ==
+ RTE_DEVTYPE_BLACKLISTED_PCI) {
+ RTE_LOG(INFO, EAL, " Device is blacklisted, not"
+ " initializing\n");
+ return 1;
+ }
+
+ RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
+ dev->id.device_id, dr->driver.name);
+
+ if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
+ /* map resources for devices that use igb_uio */
+ ret = rte_pci_map_device(dev);
+ if (ret != 0)
+ return ret;
+ }
+
+ /* reference driver structure */
+ dev->driver = dr;
+ dev->device.driver = &dr->driver;
+
+ /* call the driver probe() function */
+ ret = dr->probe(dr, dev);
+ if (ret) {
+ dev->driver = NULL;
+ if ((dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) &&
+ /* Don't unmap if device is unsupported and
+ * driver needs mapped resources.
+ */
+ !(ret > 0 &&
+ (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES)))
+ rte_pci_unmap_device(dev);
+ }
+
+ return ret;
+}
+