+int
+rte_eth_representor_id_get(const struct rte_eth_dev *ethdev,
+ enum rte_eth_representor_type type,
+ int controller, int pf, int representor_port,
+ uint16_t *repr_id)
+{
+ int ret, n, i, count;
+ struct rte_eth_representor_info *info = NULL;
+ size_t size;
+
+ if (type == RTE_ETH_REPRESENTOR_NONE)
+ return 0;
+ if (repr_id == NULL)
+ return -EINVAL;
+
+ /* Get PMD representor range info. */
+ ret = rte_eth_representor_info_get(ethdev->data->port_id, NULL);
+ if (ret == -ENOTSUP && type == RTE_ETH_REPRESENTOR_VF &&
+ controller == -1 && pf == -1) {
+ /* Direct mapping for legacy VF representor. */
+ *repr_id = representor_port;
+ return 0;
+ } else if (ret < 0) {
+ return ret;
+ }
+ n = ret;
+ size = sizeof(*info) + n * sizeof(info->ranges[0]);
+ info = calloc(1, size);
+ if (info == NULL)
+ return -ENOMEM;
+ ret = rte_eth_representor_info_get(ethdev->data->port_id, info);
+ if (ret < 0)
+ goto out;
+
+ /* Default controller and pf to caller. */
+ if (controller == -1)
+ controller = info->controller;
+ if (pf == -1)
+ pf = info->pf;
+
+ /* Locate representor ID. */
+ ret = -ENOENT;
+ for (i = 0; i < n; ++i) {
+ if (info->ranges[i].type != type)
+ continue;
+ if (info->ranges[i].controller != controller)
+ continue;
+ if (info->ranges[i].id_end < info->ranges[i].id_base) {
+ RTE_LOG(WARNING, EAL, "Port %hu invalid representor ID Range %u - %u, entry %d\n",
+ ethdev->data->port_id, info->ranges[i].id_base,
+ info->ranges[i].id_end, i);
+ continue;
+
+ }
+ count = info->ranges[i].id_end - info->ranges[i].id_base + 1;
+ switch (info->ranges[i].type) {
+ case RTE_ETH_REPRESENTOR_PF:
+ if (pf < info->ranges[i].pf ||
+ pf >= info->ranges[i].pf + count)
+ continue;
+ *repr_id = info->ranges[i].id_base +
+ (pf - info->ranges[i].pf);
+ ret = 0;
+ goto out;
+ case RTE_ETH_REPRESENTOR_VF:
+ if (info->ranges[i].pf != pf)
+ continue;
+ if (representor_port < info->ranges[i].vf ||
+ representor_port >= info->ranges[i].vf + count)
+ continue;
+ *repr_id = info->ranges[i].id_base +
+ (representor_port - info->ranges[i].vf);
+ ret = 0;
+ goto out;
+ case RTE_ETH_REPRESENTOR_SF:
+ if (info->ranges[i].pf != pf)
+ continue;
+ if (representor_port < info->ranges[i].sf ||
+ representor_port >= info->ranges[i].sf + count)
+ continue;
+ *repr_id = info->ranges[i].id_base +
+ (representor_port - info->ranges[i].sf);
+ ret = 0;
+ goto out;
+ default:
+ break;
+ }
+ }
+out:
+ free(info);
+ return ret;
+}
+