fm10k: fix iov_msg_mac_vlan_pf VID checks

The VF will send a message to request multicast addresses with the
default VID. In the current code, if the PF has statically assigned a
VLAN to a VF, then the VF will not get the multicast addresses. Fix up
all of the various VLAN messages to use identical checks (since each
check was different). Also use set as a variable, so that it simplifies
our check for whether VLAN matches the pf_vid.

The new logic will allow set of a VLAN if it is zero, automatically
converting to the default VID. Otherwise it will allow setting the PF
VID, or any VLAN if PF has not statically assigned a VLAN. This is
consistent behavior, and allows VF to request either 0 or the
default_vid without silently failing.

Note that we need the check for zero since VFs might not get the default
VID message in time to actually request non-zero VLANs.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index d806d87..8c0bdc4 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
@@ -1155,6 +1155,24 @@ s32 fm10k_iov_msg_msix_pf(struct fm10k_hw *hw, u32 **results,
 }
 
 /**
+ * fm10k_iov_select_vid - Select correct default VID
+ * @hw: Pointer to hardware structure
+ * @vid: VID to correct
+ *
+ * Will report an error if VID is out of range. For VID = 0, it will return
+ * either the pf_vid or sw_vid depending on which one is set.
+ */
+static inline s32 fm10k_iov_select_vid(struct fm10k_vf_info *vf_info, u16 vid)
+{
+       if (!vid)
+               return vf_info->pf_vid ? vf_info->pf_vid : vf_info->sw_vid;
+       else if (vf_info->pf_vid && vid != vf_info->pf_vid)
+               return FM10K_ERR_PARAM;
+       else
+               return vid;
+}
+
+/**
  *  fm10k_iov_msg_mac_vlan_pf - Message handler for MAC/VLAN request from VF
  *  @hw: Pointer to hardware structure
  *  @results: Pointer array to message, results[0] is pointer to message
@@ -1168,9 +1186,10 @@ s32 fm10k_iov_msg_mac_vlan_pf(struct fm10k_hw *hw, u32 **results,
                              struct fm10k_mbx_info *mbx)
 {
        struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
-       int err = 0;
        u8 mac[ETH_ALEN];
        u32 *result;
+       int err = 0;
+       bool set;
        u16 vlan;
        u32 vid;
 
@@ -1186,19 +1205,21 @@ s32 fm10k_iov_msg_mac_vlan_pf(struct fm10k_hw *hw, u32 **results,
                if (err)
                        return err;
 
-               /* if VLAN ID is 0, set the default VLAN ID instead of 0 */
-               if (!vid || (vid == FM10K_VLAN_CLEAR)) {
-                       if (vf_info->pf_vid)
-                               vid |= vf_info->pf_vid;
-                       else
-                               vid |= vf_info->sw_vid;
-               } else if (vid != vf_info->pf_vid) {
+               /* verify upper 16 bits are zero */
+               if (vid >> 16)
                        return FM10K_ERR_PARAM;
-               }
+
+               set = !(vid & FM10K_VLAN_CLEAR);
+               vid &= ~FM10K_VLAN_CLEAR;
+
+               err = fm10k_iov_select_vid(vf_info, vid);
+               if (err < 0)
+                       return err;
+               else
+                       vid = err;
 
                /* update VSI info for VF in regards to VLAN table */
-               err = hw->mac.ops.update_vlan(hw, vid, vf_info->vsi,
-                                             !(vid & FM10K_VLAN_CLEAR));
+               err = hw->mac.ops.update_vlan(hw, vid, vf_info->vsi, set);
        }
 
        if (!err && !!results[FM10K_MAC_VLAN_MSG_MAC]) {
@@ -1214,19 +1235,18 @@ s32 fm10k_iov_msg_mac_vlan_pf(struct fm10k_hw *hw, u32 **results,
                    memcmp(mac, vf_info->mac, ETH_ALEN))
                        return FM10K_ERR_PARAM;
 
-               /* if VLAN ID is 0, set the default VLAN ID instead of 0 */
-               if (!vlan || (vlan == FM10K_VLAN_CLEAR)) {
-                       if (vf_info->pf_vid)
-                               vlan |= vf_info->pf_vid;
-                       else
-                               vlan |= vf_info->sw_vid;
-               } else if (vf_info->pf_vid) {
-                       return FM10K_ERR_PARAM;
-               }
+               set = !(vlan & FM10K_VLAN_CLEAR);
+               vlan &= ~FM10K_VLAN_CLEAR;
+
+               err = fm10k_iov_select_vid(vf_info, vlan);
+               if (err < 0)
+                       return err;
+               else
+                       vlan = err;
 
                /* notify switch of request for new unicast address */
-               err = hw->mac.ops.update_uc_addr(hw, vf_info->glort, mac, vlan,
-                                                !(vlan & FM10K_VLAN_CLEAR), 0);
+               err = hw->mac.ops.update_uc_addr(hw, vf_info->glort,
+                                                mac, vlan, set, 0);
        }
 
        if (!err && !!results[FM10K_MAC_VLAN_MSG_MULTICAST]) {
@@ -1241,19 +1261,18 @@ s32 fm10k_iov_msg_mac_vlan_pf(struct fm10k_hw *hw, u32 **results,
                if (!(vf_info->vf_flags & FM10K_VF_FLAG_MULTI_ENABLED))
                        return FM10K_ERR_PARAM;
 
-               /* if VLAN ID is 0, set the default VLAN ID instead of 0 */
-               if (!vlan || (vlan == FM10K_VLAN_CLEAR)) {
-                       if (vf_info->pf_vid)
-                               vlan |= vf_info->pf_vid;
-                       else
-                               vlan |= vf_info->sw_vid;
-               } else if (vf_info->pf_vid) {
-                       return FM10K_ERR_PARAM;
-               }
+               set = !(vlan & FM10K_VLAN_CLEAR);
+               vlan &= ~FM10K_VLAN_CLEAR;
+
+               err = fm10k_iov_select_vid(vf_info, vlan);
+               if (err < 0)
+                       return err;
+               else
+                       vlan = err;
 
                /* notify switch of request for new multicast address */
-               err = hw->mac.ops.update_mc_addr(hw, vf_info->glort, mac, vlan,
-                                                !(vlan & FM10K_VLAN_CLEAR));
+               err = hw->mac.ops.update_mc_addr(hw, vf_info->glort,
+                                                mac, vlan, set);
        }
 
        return err;