e1000e: only perform ESB2 MDIC workaround on certain configurations

A workaround added for all ESB2 devices (adds a delay for all MDIC accesses
which resolves an issue with the MDIC ready bit being set prematurely) is
applicable only to devices in which the MAC-PHY interconnect is not
operating in a certain mode with in-band MDIO.  Check the control register
for the operating mode and enable the workaround accordingly.

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, 5 insertions, 0 deletions

diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 5ed17889e64d..2784cf44a6f3 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -900,6 +900,10 @@ struct e1000_dev_spec_82571 {
         u32 smb_counter;
 };
 
+struct e1000_dev_spec_80003es2lan {
+        bool  mdic_wa_enable;
+};
+
 struct e1000_shadow_ram {
         u16  value;
         bool modified;
@@ -928,6 +932,7 @@ struct e1000_hw {
 
         union {
                 struct e1000_dev_spec_82571     e82571;
+                struct e1000_dev_spec_80003es2lan e80003es2lan;
                 struct e1000_dev_spec_ich8lan   ich8lan;
         } dev_spec;
 };