+/*
+ * Get the allowed maximum number of RXDs of every rx queue.
+ * *pid return the port id which has minimal value of
+ * max_rxd in all queues of all ports.
+ */
+static uint16_t
+get_allowed_max_nb_rxd(portid_t *pid)
+{
+ uint16_t allowed_max_rxd = UINT16_MAX;
+ portid_t pi;
+ struct rte_eth_dev_info dev_info;
+
+ RTE_ETH_FOREACH_DEV(pi) {
+ if (eth_dev_info_get_print_err(pi, &dev_info) != 0)
+ continue;
+
+ if (dev_info.rx_desc_lim.nb_max < allowed_max_rxd) {
+ allowed_max_rxd = dev_info.rx_desc_lim.nb_max;
+ *pid = pi;
+ }
+ }
+ return allowed_max_rxd;
+}
+
+/*
+ * Get the allowed minimal number of RXDs of every rx queue.
+ * *pid return the port id which has minimal value of
+ * min_rxd in all queues of all ports.
+ */
+static uint16_t
+get_allowed_min_nb_rxd(portid_t *pid)
+{
+ uint16_t allowed_min_rxd = 0;
+ portid_t pi;
+ struct rte_eth_dev_info dev_info;
+
+ RTE_ETH_FOREACH_DEV(pi) {
+ if (eth_dev_info_get_print_err(pi, &dev_info) != 0)
+ continue;
+
+ if (dev_info.rx_desc_lim.nb_min > allowed_min_rxd) {
+ allowed_min_rxd = dev_info.rx_desc_lim.nb_min;
+ *pid = pi;
+ }
+ }
+
+ return allowed_min_rxd;
+}
+
+/*
+ * Check input rxd is valid or not.
+ * If input rxd is not greater than any of maximum number
+ * of RXDs of every Rx queues and is not less than any of
+ * minimal number of RXDs of every Rx queues, it is valid.
+ * if valid, return 0, else return -1
+ */
+int
+check_nb_rxd(queueid_t rxd)
+{
+ uint16_t allowed_max_rxd;
+ uint16_t allowed_min_rxd;
+ portid_t pid = 0;
+
+ allowed_max_rxd = get_allowed_max_nb_rxd(&pid);
+ if (rxd > allowed_max_rxd) {
+ fprintf(stderr,
+ "Fail: input rxd (%u) can't be greater than max_rxds (%u) of port %u\n",
+ rxd, allowed_max_rxd, pid);
+ return -1;
+ }
+
+ allowed_min_rxd = get_allowed_min_nb_rxd(&pid);
+ if (rxd < allowed_min_rxd) {
+ fprintf(stderr,
+ "Fail: input rxd (%u) can't be less than min_rxds (%u) of port %u\n",
+ rxd, allowed_min_rxd, pid);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Get the allowed maximum number of TXDs of every rx queues.
+ * *pid return the port id which has minimal value of
+ * max_txd in every tx queue.
+ */
+static uint16_t
+get_allowed_max_nb_txd(portid_t *pid)
+{
+ uint16_t allowed_max_txd = UINT16_MAX;
+ portid_t pi;
+ struct rte_eth_dev_info dev_info;
+
+ RTE_ETH_FOREACH_DEV(pi) {
+ if (eth_dev_info_get_print_err(pi, &dev_info) != 0)
+ continue;
+
+ if (dev_info.tx_desc_lim.nb_max < allowed_max_txd) {
+ allowed_max_txd = dev_info.tx_desc_lim.nb_max;
+ *pid = pi;
+ }
+ }
+ return allowed_max_txd;
+}
+
+/*
+ * Get the allowed maximum number of TXDs of every tx queues.
+ * *pid return the port id which has minimal value of
+ * min_txd in every tx queue.
+ */
+static uint16_t
+get_allowed_min_nb_txd(portid_t *pid)
+{
+ uint16_t allowed_min_txd = 0;
+ portid_t pi;
+ struct rte_eth_dev_info dev_info;
+
+ RTE_ETH_FOREACH_DEV(pi) {
+ if (eth_dev_info_get_print_err(pi, &dev_info) != 0)
+ continue;
+
+ if (dev_info.tx_desc_lim.nb_min > allowed_min_txd) {
+ allowed_min_txd = dev_info.tx_desc_lim.nb_min;
+ *pid = pi;
+ }
+ }
+
+ return allowed_min_txd;
+}
+
+/*
+ * Check input txd is valid or not.
+ * If input txd is not greater than any of maximum number
+ * of TXDs of every Rx queues, it is valid.
+ * if valid, return 0, else return -1
+ */
+int
+check_nb_txd(queueid_t txd)
+{
+ uint16_t allowed_max_txd;
+ uint16_t allowed_min_txd;
+ portid_t pid = 0;
+
+ allowed_max_txd = get_allowed_max_nb_txd(&pid);
+ if (txd > allowed_max_txd) {
+ fprintf(stderr,
+ "Fail: input txd (%u) can't be greater than max_txds (%u) of port %u\n",
+ txd, allowed_max_txd, pid);
+ return -1;
+ }
+
+ allowed_min_txd = get_allowed_min_nb_txd(&pid);
+ if (txd < allowed_min_txd) {
+ fprintf(stderr,
+ "Fail: input txd (%u) can't be less than min_txds (%u) of port %u\n",
+ txd, allowed_min_txd, pid);
+ return -1;
+ }
+ return 0;
+}
+
+