e1000e: provide family-specific functions to manage VLAN filter arrays

The two MAC-families that have VLAN filter table register arrays manage
each a bit differently from one another, so provide family-specific
functions for managing the register arrays and function pointers to access
the appropriate function.  Also make sure attempts to access these
register arrays are not done on parts not supporting that feature.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index f690a1055b41..e3976ea668d0 100644
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -82,7 +82,24 @@ s32 e1000e_get_bus_info_pcie(struct e1000_hw *hw)
 }
 
 /**
- *  e1000e_write_vfta - Write value to VLAN filter table
+ *  e1000_clear_vfta_generic - Clear VLAN filter table
+ *  @hw: pointer to the HW structure
+ *
+ *  Clears the register array which contains the VLAN filter table by
+ *  setting all the values to 0.
+ **/
+void e1000_clear_vfta_generic(struct e1000_hw *hw)
+{
+        u32 offset;
+
+        for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) {
+                E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, 0);
+                e1e_flush();
+        }
+}
+
+/**
+ *  e1000_write_vfta_generic - Write value to VLAN filter table
  *  @hw: pointer to the HW structure
  *  @offset: register offset in VLAN filter table
  *  @value: register value written to VLAN filter table
@@ -90,7 +107,7 @@ s32 e1000e_get_bus_info_pcie(struct e1000_hw *hw)
  *  Writes value at the given offset in the register array which stores
  *  the VLAN filter table.
  **/
-void e1000e_write_vfta(struct e1000_hw *hw, u32 offset, u32 value)
+void e1000_write_vfta_generic(struct e1000_hw *hw, u32 offset, u32 value)
 {
         E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, value);
         e1e_flush();