net/virtio: report Tx descriptor limits in dev info

Report max/min/align Tx descriptors limits in device info get callback.
Before calling the callback, rte_eth_dev_info_get() provides
default values of nb_min as zero and nb_max as UINT16_MAX that are
not correct for the driver, so one can't rely on them.

Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 3e3b42e..a32c0c3 100644 (file)
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -2582,6 +2582,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
                 * The Queue Size value does not have to be a power of 2.
                 */
                dev_info->rx_desc_lim.nb_max = UINT16_MAX;
+               dev_info->tx_desc_lim.nb_max = UINT16_MAX;
        } else {
                /*
                 * According to 2.6 Split Virtqueues:
@@ -2589,6 +2590,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
                 * Size value is 32768.
                 */
                dev_info->rx_desc_lim.nb_max = 32768;
+               dev_info->tx_desc_lim.nb_max = 32768;
        }
        /*
         * Actual minimum is not the same for virtqueues of different kinds,
@@ -2597,7 +2599,9 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
         */
        dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
                                               RTE_VIRTIO_VPMD_RX_REARM_THRESH);
+       dev_info->tx_desc_lim.nb_min = DEFAULT_TX_FREE_THRESH;
        dev_info->rx_desc_lim.nb_align = 1;
+       dev_info->tx_desc_lim.nb_align = 1;
 
        return 0;
 }