[PATCH v2] net/iavf: initialize large VF setting at startup

[Ghalem Boudour]

lv_enabled is used to remember if large VF setting is configured, but
its value is not initialized at startup. This can lead to a different
configuration regarding the initial configuration of the PF.
For example, a first start is done with 8 rx and 8 tx queues. Large VF
is not needed and reta size is 64.
A second start is done with 20 rx and tx queues. Large VF is required
and reta size is 256.
A third start is done with 2 rx and tx queues. Large VF is not needed
but reta size is 256 as the PF has been configured during the second
start.

In order to have a consistent behavior regarding reta size whatever
the configuration of the PF (may be changed by a previous boot) the
lv_enabled must be set properly at the init phase.

Signed-off-by: Ghalem Boudour <ghalem.boudour at 6wind.com>
Signed-off-by: Thibaut Collet <thibaut.collet at 6wind.com>
Reviewed-by: Olivier Matz <olivier.matz at 6wind.com>
---
v2:
* Enable large VF at initialization independently of rss configuration
---
 drivers/net/iavf/iavf_ethdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 79397f15e54f..d6190ac24ac6 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -2278,6 +2278,9 @@ iavf_init_vf(struct rte_eth_dev *dev)
 		}
 	}
 
+	if (vf->vsi_res->num_queue_pairs > IAVF_MAX_NUM_QUEUES_DFLT)
+		vf->lv_enabled = true;
+
 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC) {
 		if (iavf_get_supported_rxdid(adapter) != 0) {
 			PMD_INIT_LOG(ERR, "failed to do get supported rxdid");
-- 
2.30.2