Currently, the maximum value of rx/tx queueus are kept by EAL. But, the value are used like below different meanings in vhost PMD. - The maximum value of current enabled queues. - The maximum value of current supported queues.
This wrong double meaning will cause an issue like below steps. * Invoke application with below option. --vdev 'eth_vhost0,iface=<socket path>,queues=4' * Configure queues like below. rte_eth_dev_configure(portid, 2, 2, ...); * Configure queues again like below. rte_eth_dev_configure(portid, 4, 4, ...); The second rte_eth_dev_configure() will be failed because both the maximum value of current enabled queues and supported queues will be '2' after calling first rte_eth_dev_configure(). To fix the issue, the patch prepare one more variable to keep the number of maximum supported queues in vhost PMD. Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp> --- drivers/net/vhost/rte_eth_vhost.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index 6b9d287..5fd8c70 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -88,6 +88,7 @@ struct vhost_queue { struct pmd_internal { char *dev_name; char *iface_name; + uint16_t max_queues; volatile uint16_t once; }; @@ -555,11 +556,19 @@ static void eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) { + struct pmd_internal *internal; + + internal = dev->data->dev_private; + if (internal == NULL) { + RTE_LOG(ERR, PMD, "Invalid device specified\n"); + return; + } + dev_info->driver_name = drivername; dev_info->max_mac_addrs = 1; dev_info->max_rx_pktlen = (uint32_t)-1; - dev_info->max_rx_queues = dev->data->nb_rx_queues; - dev_info->max_tx_queues = dev->data->nb_tx_queues; + dev_info->max_rx_queues = internal->max_queues; + dev_info->max_tx_queues = internal->max_queues; dev_info->min_rx_bufsize = 0; } @@ -751,6 +760,7 @@ eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues, memmove(data->name, eth_dev->data->name, sizeof(data->name)); data->nb_rx_queues = queues; data->nb_tx_queues = queues; + internal->max_queues = queues; data->dev_link = pmd_link; data->mac_addrs = eth_addr; -- 2.1.4