uint64_t offloads;
};
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to return the hairpin capabilities that are supported.
+ */
+struct rte_eth_hairpin_cap {
+ /** The max number of hairpin queues (different bindings). */
+ uint16_t max_nb_queues;
+ /** Max number of Rx queues to be connected to one Tx queue. */
+ uint16_t max_rx_2_tx;
+ /** Max number of Tx queues to be connected to one Rx queue. */
+ uint16_t max_tx_2_rx;
+ uint16_t max_nb_desc; /**< The max num of descriptors. */
+};
+
+#define RTE_ETH_MAX_HAIRPIN_PEERS 32
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to hold hairpin peer data.
+ */
+struct rte_eth_hairpin_peer {
+ uint16_t port; /**< Peer port. */
+ uint16_t queue; /**< Peer queue. */
+};
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * A structure used to configure hairpin binding.
+ */
+struct rte_eth_hairpin_conf {
+ uint16_t peer_count; /**< The number of peers. */
+ struct rte_eth_hairpin_peer peers[RTE_ETH_MAX_HAIRPIN_PEERS];
+};
+
/**
* A structure contains information about HW descriptor ring limitations.
*/
const struct rte_eth_rxconf *rx_conf,
struct rte_mempool *mb_pool);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * Allocate and set up a hairpin receive queue for an Ethernet device.
+ *
+ * The function set up the selected queue to be used in hairpin.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @param rx_queue_id
+ * The index of the receive queue to set up.
+ * The value must be in the range [0, nb_rx_queue - 1] previously supplied
+ * to rte_eth_dev_configure().
+ * @param nb_rx_desc
+ * The number of receive descriptors to allocate for the receive ring.
+ * 0 means the PMD will use default value.
+ * @param conf
+ * The pointer to the hairpin configuration.
+ *
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-EINVAL) if bad parameter.
+ * - (-ENOMEM) if unable to allocate the resources.
+ */
+__rte_experimental
+int rte_eth_rx_hairpin_queue_setup
+ (uint16_t port_id, uint16_t rx_queue_id, uint16_t nb_rx_desc,
+ const struct rte_eth_hairpin_conf *conf);
+
/**
* Allocate and set up a transmit queue for an Ethernet device.
*
uint16_t nb_tx_desc, unsigned int socket_id,
const struct rte_eth_txconf *tx_conf);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * Allocate and set up a transmit hairpin queue for an Ethernet device.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @param tx_queue_id
+ * The index of the transmit queue to set up.
+ * The value must be in the range [0, nb_tx_queue - 1] previously supplied
+ * to rte_eth_dev_configure().
+ * @param nb_tx_desc
+ * The number of transmit descriptors to allocate for the transmit ring.
+ * 0 to set default PMD value.
+ * @param conf
+ * The hairpin configuration.
+ *
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ * - (-EINVAL) if bad parameter.
+ * - (-ENOMEM) if unable to allocate the resources.
+ */
+__rte_experimental
+int rte_eth_tx_hairpin_queue_setup
+ (uint16_t port_id, uint16_t tx_queue_id, uint16_t nb_tx_desc,
+ const struct rte_eth_hairpin_conf *conf);
+
/**
* Return the NUMA socket to which an Ethernet device is connected
*
* to rte_eth_dev_configure().
* @return
* - 0: Success, the receive queue is started.
- * - -EINVAL: The port_id or the queue_id out of range.
+ * - -EINVAL: The port_id or the queue_id out of range or belong to hairpin.
* - -EIO: if device is removed.
* - -ENOTSUP: The function not supported in PMD driver.
*/
* to rte_eth_dev_configure().
* @return
* - 0: Success, the receive queue is stopped.
- * - -EINVAL: The port_id or the queue_id out of range.
+ * - -EINVAL: The port_id or the queue_id out of range or belong to hairpin.
* - -EIO: if device is removed.
* - -ENOTSUP: The function not supported in PMD driver.
*/
* to rte_eth_dev_configure().
* @return
* - 0: Success, the transmit queue is started.
- * - -EINVAL: The port_id or the queue_id out of range.
+ * - -EINVAL: The port_id or the queue_id out of range or belong to hairpin.
* - -EIO: if device is removed.
* - -ENOTSUP: The function not supported in PMD driver.
*/
* to rte_eth_dev_configure().
* @return
* - 0: Success, the transmit queue is stopped.
- * - -EINVAL: The port_id or the queue_id out of range.
+ * - -EINVAL: The port_id or the queue_id out of range or belong to hairpin.
* - -EIO: if device is removed.
* - -ENOTSUP: The function not supported in PMD driver.
*/
* @return
* - 0: Success
* - -ENOTSUP: routine is not supported by the device PMD.
- * - -EINVAL: The port_id or the queue_id is out of range.
+ * - -EINVAL: The port_id or the queue_id is out of range, or the queue
+ * is hairpin queue.
*/
int rte_eth_rx_queue_info_get(uint16_t port_id, uint16_t queue_id,
struct rte_eth_rxq_info *qinfo);
* @return
* - 0: Success
* - -ENOTSUP: routine is not supported by the device PMD.
- * - -EINVAL: The port_id or the queue_id is out of range.
+ * - -EINVAL: The port_id or the queue_id is out of range, or the queue
+ * is hairpin queue.
*/
int rte_eth_tx_queue_info_get(uint16_t port_id, uint16_t queue_id,
struct rte_eth_txq_info *qinfo);
void *
rte_eth_dev_get_sec_ctx(uint16_t port_id);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * Query the device hairpin capabilities.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @param cap
+ * Pointer to a structure that will hold the hairpin capabilities.
+ * @return
+ * - (0) if successful.
+ * - (-ENOTSUP) if hardware doesn't support.
+ */
+__rte_experimental
+int rte_eth_dev_hairpin_capability_get(uint16_t port_id,
+ struct rte_eth_hairpin_cap *cap);
#include <rte_ethdev_core.h>
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