+#ifdef RTE_PCI_CONFIG
+static int
+pci_config_extended_tag(struct rte_pci_device *dev)
+{
+ struct rte_pci_addr *loc = &dev->addr;
+ char filename[PATH_MAX];
+ char buf[BUFSIZ];
+ FILE *f;
+
+ /* not configured, let it as is */
+ if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) != 0 &&
+ strncmp(RTE_PCI_EXTENDED_TAG, "off", 3) != 0)
+ return 0;
+
+ snprintf(filename, sizeof(filename),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "extended_tag",
+ loc->domain, loc->bus, loc->devid, loc->function);
+ f = fopen(filename, "rw+");
+ if (!f)
+ return -1;
+
+ fgets(buf, sizeof(buf), f);
+ if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) == 0) {
+ /* enable Extended Tag*/
+ if (strncmp(buf, "on", 2) != 0) {
+ fseek(f, 0, SEEK_SET);
+ fputs("on", f);
+ }
+ } else {
+ /* disable Extended Tag */
+ if (strncmp(buf, "off", 3) != 0) {
+ fseek(f, 0, SEEK_SET);
+ fputs("off", f);
+ }
+ }
+ fclose(f);
+
+ return 0;
+}
+
+static int
+pci_config_max_read_request_size(struct rte_pci_device *dev)
+{
+ struct rte_pci_addr *loc = &dev->addr;
+ char filename[PATH_MAX];
+ char buf[BUFSIZ], param[BUFSIZ];
+ FILE *f;
+ /* size can be 128, 256, 512, 1024, 2048, 4096 */
+ uint32_t max_size = RTE_PCI_MAX_READ_REQUEST_SIZE;
+
+ /* not configured, let it as is */
+ if (!max_size)
+ return 0;
+
+ snprintf(filename, sizeof(filename),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "max_read_request_size",
+ loc->domain, loc->bus, loc->devid, loc->function);
+ f = fopen(filename, "rw+");
+ if (!f)
+ return -1;
+
+ fgets(buf, sizeof(buf), f);
+ snprintf(param, sizeof(param), "%d", max_size);
+
+ /* check if the size to be set is the same as current */
+ if (strcmp(buf, param) == 0) {
+ fclose(f);
+ return 0;
+ }
+ fseek(f, 0, SEEK_SET);
+ fputs(param, f);
+ fclose(f);
+
+ return 0;
+}
+
+static void
+pci_config_space_set(struct rte_pci_device *dev)
+{
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return;
+
+ /* configure extended tag */
+ pci_config_extended_tag(dev);
+
+ /* configure max read request size */
+ pci_config_max_read_request_size(dev);
+}
+#endif
+
+static int
+pci_map_device(struct rte_pci_device *dev)
+{
+ int ret = -1;
+
+ /* try mapping the NIC resources using VFIO if it exists */
+ switch (dev->pt_driver) {
+ case RTE_PT_VFIO:
+#ifdef VFIO_PRESENT
+ if (pci_vfio_is_enabled())
+ ret = pci_vfio_map_resource(dev);
+#endif
+ break;
+ case RTE_PT_IGB_UIO:
+ case RTE_PT_UIO_GENERIC:
+ /* map resources for devices that use uio */
+ ret = pci_uio_map_resource(dev);
+ break;
+ default:
+ RTE_LOG(DEBUG, EAL, " Not managed by known pt driver,"
+ " skipped\n");
+ ret = 1;
+ break;
+ }
+
+ return ret;
+}
+
+#ifdef RTE_LIBRTE_EAL_HOTPLUG
+static void
+pci_unmap_device(struct rte_pci_device *dev)
+{
+ if (dev == NULL)
+ return;
+
+ /* try unmapping the NIC resources using VFIO if it exists */
+ switch (dev->pt_driver) {
+ case RTE_PT_VFIO:
+ RTE_LOG(ERR, EAL, "Hotplug doesn't support vfio yet\n");
+ break;
+ case RTE_PT_IGB_UIO:
+ case RTE_PT_UIO_GENERIC:
+ /* unmap resources for devices that use uio */
+ pci_uio_unmap_resource(dev);
+ break;
+ default:
+ RTE_LOG(DEBUG, EAL, " Not managed by known pt driver,"
+ " skipped\n");
+ break;
+ }
+}
+#endif /* RTE_LIBRTE_EAL_HOTPLUG */
+