ethdev: add traffic management ops get API

The rte_flow feature breaks the monolithic approach for ethdev by
introducing the new rte_flow API to ethdev using a plugin-like approach.

Basically, the rte_flow API is still logically part of ethdev:
- It extends the ethdev functionality: rte_flow is a new feature/
  capability of ethdev;
- all its functions work on an Ethernet device: the first parameter of the
  rte_flow functions is Ethernet device port ID.

Also, the rte_flow API is a sort of capability plugin for ethdev:
- the rte_flow API functions have their own name space: they are called
  rte_flow_operationXYZ() as opposed to rte_eth_dev_flow_operationXYZ());
- the rte_flow API functions are placed in separate files in the same
  librte_ether folder as opposed to rte_ethdev.[hc].

The way it works is by using the existing ethdev API function
rte_eth_dev_filter_ctrl() to query the current Ethernet device port ID for
the support of the rte_flow capability and return the pointer to the
rte_flow operations when supported and NULL otherwise:

struct rte_flow_ops *eth_flow_ops;
int rte = rte_eth_dev_filter_ctrl(eth_port_id,
	RTE_ETH_FILTER_GENERIC, RTE_ETH_FILTER_GET, &eth_flow_ops);

This patch reuses the same approach for ethdev Traffic Management API.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index fd6baf3..f683727 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1416,6 +1416,9 @@ typedef int (*eth_filter_ctrl_t)(struct rte_eth_dev *dev,
                                 void *arg);
 /**< @internal Take operations to assigned filter type on an Ethernet device */
 
+typedef int (*eth_tm_ops_get_t)(struct rte_eth_dev *dev, void *ops);
+/**< @internal Get Traffic Management (TM) operations on an Ethernet device */
+
 typedef int (*eth_get_dcb_info)(struct rte_eth_dev *dev,
                                 struct rte_eth_dcb_info *dcb_info);
 /**< @internal Get dcb information on an Ethernet device */
@@ -1536,6 +1539,9 @@ struct eth_dev_ops {
        /**< Get extended device statistic values by ID. */
        eth_xstats_get_names_by_id_t xstats_get_names_by_id;
        /**< Get name of extended device statistics by ID. */
+
+       eth_tm_ops_get_t tm_ops_get;
+       /**< Get Traffic Management (TM) operations. */
 };
 
 /**