+
+#define OFF_MAX ((uint64_t)(off_t)-1)
+static ssize_t
+pci_uio_get_mappings(const char *devname, struct uio_map maps[], size_t nb_maps)
+{
+ size_t i;
+ char dirname[PATH_MAX];
+ char filename[PATH_MAX];
+ uint64_t offset, size;
+
+ for (i = 0; i != nb_maps; i++) {
+
+ /* check if map directory exists */
+ rte_snprintf(dirname, sizeof(dirname),
+ "%s/maps/map%u", devname, i);
+
+ if (access(dirname, F_OK) != 0)
+ break;
+
+ /* get mapping offset */
+ rte_snprintf(filename, sizeof(filename),
+ "%s/offset", dirname);
+ if (pci_parse_sysfs_value(filename, &offset) < 0) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot parse offset of %s\n",
+ __func__, dirname);
+ return (-1);
+ }
+
+ /* get mapping size */
+ rte_snprintf(filename, sizeof(filename),
+ "%s/size", dirname);
+ if (pci_parse_sysfs_value(filename, &size) < 0) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot parse size of %s\n",
+ __func__, dirname);
+ return (-1);
+ }
+
+ /* get mapping physical address */
+ rte_snprintf(filename, sizeof(filename),
+ "%s/addr", dirname);
+ if (pci_parse_sysfs_value(filename, &maps[i].phaddr) < 0) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot parse addr of %s\n",
+ __func__, dirname);
+ return (-1);
+ }
+
+ if ((offset > OFF_MAX) || (size > SIZE_MAX)) {
+ RTE_LOG(ERR, EAL,
+ "%s(): offset/size exceed system max value\n",
+ __func__);
+ return (-1);
+ }
+
+ maps[i].offset = offset;
+ maps[i].size = size;
+ }
+ return (i);
+}
+
+static int
+pci_uio_map_secondary(struct rte_pci_device *dev)
+{
+ size_t i;
+ struct uio_resource *uio_res;
+
+ TAILQ_FOREACH(uio_res, uio_res_list, next) {
+
+ /* skip this element if it doesn't match our PCI address */
+ if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
+ continue;
+
+ for (i = 0; i != uio_res->nb_maps; i++) {
+ if (pci_map_resource(dev, uio_res->maps[i].addr,
+ uio_res->path,
+ (off_t)uio_res->maps[i].offset,
+ (size_t)uio_res->maps[i].size) !=
+ uio_res->maps[i].addr) {
+ RTE_LOG(ERR, EAL,
+ "Cannot mmap device resource\n");
+ return (-1);
+ }
+ }
+ return (0);
+ }
+
+ RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
+ return -1;
+}
+