i40e: notify VFs of link state

Gratuitously notify VFs of link state when they activate their queues.
In general, this is the last thing that a VF driver will do as it opens
its interface, so this is a good time to notify the VF.

Currently, VF devices assume link is up unless told otherwise, which
means that VFs instantiated on a PF with no link will report the wrong
state. This change corrects that issue.

Change-ID: Iea53622904ecc681ac3f8938d81c30033ef9a0a6
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 31 insertions, 19 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 9b3fc83119fa..8df2b529289b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -25,6 +25,7 @@
  ******************************************************************************/
 
 #include "i40e.h"
+static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf);
 
 /***********************misc routines*****************************/
 
@@ -1767,6 +1768,7 @@ int i40e_vc_process_vf_msg(struct i40e_pf *pf, u16 vf_id, u32 v_opcode,
                 break;
         case I40E_VIRTCHNL_OP_ENABLE_QUEUES:
                 ret = i40e_vc_enable_queues_msg(vf, msg, msglen);
+                i40e_vc_notify_vf_link_state(vf);
                 break;
         case I40E_VIRTCHNL_OP_DISABLE_QUEUES:
                 ret = i40e_vc_disable_queues_msg(vf, msg, msglen);
@@ -1875,35 +1877,45 @@ static void i40e_vc_vf_broadcast(struct i40e_pf *pf,
 
 /**
  * i40e_vc_notify_link_state
- * @pf: pointer to the PF structure
+ * @vf: pointer to the VF structure
  *
- * send a link status message to all VFs on a given PF
+ * send a link status message to a single VF
  **/
-void i40e_vc_notify_link_state(struct i40e_pf *pf)
+static void i40e_vc_notify_vf_link_state(struct i40e_vf *vf)
 {
         struct i40e_virtchnl_pf_event pfe;
+        struct i40e_pf *pf = vf->pf;
         struct i40e_hw *hw = &pf->hw;
-        struct i40e_vf *vf = pf->vf;
         struct i40e_link_status *ls = &pf->hw.phy.link_info;
-        int i;
+        int abs_vf_id = vf->vf_id + hw->func_caps.vf_base_id;
 
         pfe.event = I40E_VIRTCHNL_EVENT_LINK_CHANGE;
         pfe.severity = I40E_PF_EVENT_SEVERITY_INFO;
-        for (i = 0; i < pf->num_alloc_vfs; i++, vf++) {
-                int abs_vf_id = vf->vf_id + hw->func_caps.vf_base_id;
-                if (vf->link_forced) {
-                        pfe.event_data.link_event.link_status = vf->link_up;
-                        pfe.event_data.link_event.link_speed =
-                                (vf->link_up ? I40E_LINK_SPEED_40GB : 0);
-                } else {
-                        pfe.event_data.link_event.link_status =
-                                ls->link_info & I40E_AQ_LINK_UP;
-                        pfe.event_data.link_event.link_speed = ls->link_speed;
-                }
-                i40e_aq_send_msg_to_vf(hw, abs_vf_id, I40E_VIRTCHNL_OP_EVENT,
-                                       0, (u8 *)&pfe, sizeof(pfe),
-                                       NULL);
+        if (vf->link_forced) {
+                pfe.event_data.link_event.link_status = vf->link_up;
+                pfe.event_data.link_event.link_speed =
+                        (vf->link_up ? I40E_LINK_SPEED_40GB : 0);
+        } else {
+                pfe.event_data.link_event.link_status =
+                        ls->link_info & I40E_AQ_LINK_UP;
+                pfe.event_data.link_event.link_speed = ls->link_speed;
         }
+        i40e_aq_send_msg_to_vf(hw, abs_vf_id, I40E_VIRTCHNL_OP_EVENT,
+                               0, (u8 *)&pfe, sizeof(pfe), NULL);
+}
+
+/**
+ * i40e_vc_notify_link_state
+ * @pf: pointer to the PF structure
+ *
+ * send a link status message to all VFs on a given PF
+ **/
+void i40e_vc_notify_link_state(struct i40e_pf *pf)
+{
+        int i;
+
+        for (i = 0; i < pf->num_alloc_vfs; i++)
+                i40e_vc_notify_vf_link_state(&pf->vf[i]);
 }
 
 /**