[dpdk-dev] [PATCH] net/i40e: fix PF notify issue when VF is not up

[Xiaoyun Li]

This patch stops PF from sending message to VF when VF's ARQ and ATQ
isn't enabled, namely VF isn't up and modifies VF state to active when
VF reset is completed.

Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable at dpdk.org

Signed-off-by: Xiaoyun Li <xiaoyun.li at intel.com>
---
 drivers/net/i40e/i40e_pf.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
index 100f8dc..c40f40a 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -167,6 +167,9 @@ i40e_pf_host_vf_reset(struct i40e_pf_vf *vf, bool do_hw_reset)
 		PMD_DRV_LOG(ERR, "VF reset timeout");
 		return -ETIMEDOUT;
 	}
+
+	vf->state = I40E_VF_ACTIVE;
+
 	/* This is not first time to do reset, do cleanup job first */
 	if (vf->vsi) {
 		/* Disable queues */
@@ -1224,8 +1227,22 @@ i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)
 		break;
 	}
 
-	i40e_pf_host_send_msg_to_vf(vf, VIRTCHNL_OP_EVENT,
-		I40E_SUCCESS, (uint8_t *)&event, sizeof(event));
+	uint32_t tval, rval;
+	uint16_t vf_id;
+	struct i40e_hw *hw;
+
+	hw = I40E_PF_TO_HW(vf->pf);
+	vf_id = vf->vf_idx;
+
+	tval = I40E_READ_REG(hw, I40E_VF_ATQLEN(vf_id));
+	rval = I40E_READ_REG(hw, I40E_VF_ARQLEN(vf_id));
+
+	if (tval & I40E_VF_ATQLEN_ATQLEN_MASK ||
+		tval & I40E_VF_ATQLEN_ATQENABLE_MASK ||
+		rval & I40E_VF_ARQLEN_ARQLEN_MASK ||
+		rval & I40E_VF_ARQLEN_ARQENABLE_MASK)
+		i40e_pf_host_send_msg_to_vf(vf, VIRTCHNL_OP_EVENT,
+			I40E_SUCCESS, (uint8_t *)&event, sizeof(event));
 }
 
 void
-- 
2.7.4