ethdev: get queues numbers

The new fields nb_rx_queues and nb_tx_queues are added to the
rte_eth_dev_info structure.
Changes to API rte_eth_dev_info_get() are done to update these new fields
to the rte_eth_dev_info object.
Release notes is updated with the changes.

The librte_pdump library needs to register Rx and Tx callbacks for all
the nb_rx_queues and nb_tx_queues, when application wants to capture the
packets on all the software configured number of Rx and Tx queues of the
device. So far there is no support to get nb_rx_queues and nb_tx_queues
information from the ethdev library. Hence these changes are introduced.

Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

diff --git a/doc/guides/rel_notes/release_16_07.rst b/doc/guides/rel_notes/release_16_07.rst
index ff8cc0d..58a49c4 100644 (file)
--- a/doc/guides/rel_notes/release_16_07.rst
+++ b/doc/guides/rel_notes/release_16_07.rst
@@ -148,6 +148,9 @@ API Changes
 * The extended statistics are fetched by ids with ``rte_eth_xstats_get``
   after a lookup by name ``rte_eth_xstats_get_names``.
 
+* The function ``rte_eth_dev_info_get`` fill the new fields ``nb_rx_queues``
+  and ``nb_tx_queues`` in the structure ``rte_eth_dev_info``.
+
 
 ABI Changes
 -----------
@@ -159,6 +162,9 @@ ABI Changes
 * The ``rte_port_source_params`` structure has new fields to support PCAP file.
   It was already in release 16.04 with ``RTE_NEXT_ABI`` flag.
 
+* The ``rte_eth_dev_info`` structure has new fields ``nb_rx_queues`` and ``nb_tx_queues``
+  to support number of queues configured by software.
+
 
 Shared Library Versions
 -----------------------

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 3a30443..53bb865 100644 (file)
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1735,6 +1735,8 @@ rte_eth_dev_info_get(uint8_t port_id, struct rte_eth_dev_info *dev_info)
        (*dev->dev_ops->dev_infos_get)(dev, dev_info);
        dev_info->pci_dev = dev->pci_dev;
        dev_info->driver_name = dev->data->drv_name;
+       dev_info->nb_rx_queues = dev->data->nb_rx_queues;
+       dev_info->nb_tx_queues = dev->data->nb_tx_queues;
 }
 
 int

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index c7983d3..f39199a 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -882,6 +882,9 @@ struct rte_eth_dev_info {
        struct rte_eth_desc_lim rx_desc_lim;  /**< RX descriptors limits */
        struct rte_eth_desc_lim tx_desc_lim;  /**< TX descriptors limits */
        uint32_t speed_capa;  /**< Supported speeds bitmap (ETH_LINK_SPEED_). */
+       /** Configured number of rx/tx queues */
+       uint16_t nb_rx_queues; /**< Number of RX queues. */
+       uint16_t nb_tx_queues; /**< Number of TX queues. */
 };
 
 /**