net/fm10k/base: use different name for override bit

Use a new #define FM10K_VLAN_OVERRIDE even though we're using
the exact same bit. The reason for this is clarity in the code,
otherwise you can read FM10K_VLAN_CLEAR and think it should be
removed. Also add a comment explaining why the FM10K_VLAN_OVERRIDE
bit is set.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/drivers/net/fm10k/base/fm10k_pf.c b/drivers/net/fm10k/base/fm10k_pf.c
index 856cb8a..878d46e 100644 (file)
--- a/drivers/net/fm10k/base/fm10k_pf.c
+++ b/drivers/net/fm10k/base/fm10k_pf.c
@@ -912,13 +912,13 @@ STATIC s32 fm10k_iov_assign_default_mac_vlan_pf(struct fm10k_hw *hw,
        vf_q_idx = fm10k_vf_queue_index(hw, vf_idx);
        qmap_idx = qmap_stride * vf_idx;
 
-       /* MAP Tx queue back to 0 temporarily, and disable it */
-       FM10K_WRITE_REG(hw, FM10K_TQMAP(qmap_idx), 0);
-       FM10K_WRITE_REG(hw, FM10K_TXDCTL(vf_q_idx), 0);
-
-       /* determine correct default VLAN ID */
+       /* Determine correct default VLAN ID. The FM10K_VLAN_OVERRIDE bit is
+        * used here to indicate to the VF that it will not have privilege to
+        * write VLAN_TABLE. All policy is enforced on the PF but this allows
+        * the VF to correctly report errors to userspace rqeuests.
+        */
        if (vf_info->pf_vid)
-               vf_vid = vf_info->pf_vid | FM10K_VLAN_CLEAR;
+               vf_vid = vf_info->pf_vid | FM10K_VLAN_OVERRIDE;
        else
                vf_vid = vf_info->sw_vid;
 

diff --git a/drivers/net/fm10k/base/fm10k_type.h b/drivers/net/fm10k/base/fm10k_type.h
index 2ae77ad..eedfe74 100644 (file)
--- a/drivers/net/fm10k/base/fm10k_type.h
+++ b/drivers/net/fm10k/base/fm10k_type.h
@@ -393,6 +393,7 @@ struct fm10k_hw;
 #define FM10K_VLAN_TABLE_VSI_MAX               64
 #define FM10K_VLAN_LENGTH_SHIFT                        16
 #define FM10K_VLAN_CLEAR                       BIT(15)
+#define FM10K_VLAN_OVERRIDE                    FM10K_VLAN_CLEAR
 #define FM10K_VLAN_ALL \
        ((FM10K_VLAN_TABLE_VID_MAX - 1) << FM10K_VLAN_LENGTH_SHIFT)
 

diff --git a/drivers/net/fm10k/base/fm10k_vf.c b/drivers/net/fm10k/base/fm10k_vf.c
index efbdbd1..533dfeb 100644 (file)
--- a/drivers/net/fm10k/base/fm10k_vf.c
+++ b/drivers/net/fm10k/base/fm10k_vf.c
@@ -268,7 +268,7 @@ s32 fm10k_msg_mac_vlan_vf(struct fm10k_hw *hw, u32 **results,
 
        memcpy(hw->mac.perm_addr, perm_addr, ETH_ALEN);
        hw->mac.default_vid = vid & (FM10K_VLAN_TABLE_VID_MAX - 1);
-       hw->mac.vlan_override = !!(vid & FM10K_VLAN_CLEAR);
+       hw->mac.vlan_override = !!(vid & FM10K_VLAN_OVERRIDE);
 
        return FM10K_SUCCESS;
 }