e1000e: allow for swflag to be held over consecutive PHY accesses

PCH-based parts (82577/82578) and some ICH8-based parts (82566) need to
hold the swflag (sw/fw/hw hardware semaphore) over consecutive PHY accesses
in order to perform sw-driven PHY configuration during initialization to
workaround known hardware issues (see follow-on patch).  This patch
provides new PHY read/write functions (and function pointers) that will
allow accessing the PHY registers assuming the swflag has already been
acquired.  The actual PHY register access code has moved into helper
functions that are called with a flag indicating whether or not the swflag
has already been acquired and acquires/releases it if not.

The functions called from within the updated PHY access functions had to be
updated to assume the swflag was already acquired, and other functions that
called those functions were also updated to acquire/release the swflag.

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, 4 insertions, 0 deletions

diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index aaaaf2ca408..b6388b9535f 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -250,9 +250,11 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
 
         phy->ops.check_polarity       = e1000_check_polarity_ife_ich8lan;
         phy->ops.read_phy_reg         = e1000_read_phy_reg_hv;
+        phy->ops.read_phy_reg_locked  = e1000_read_phy_reg_hv_locked;
         phy->ops.set_d0_lplu_state    = e1000_set_lplu_state_pchlan;
         phy->ops.set_d3_lplu_state    = e1000_set_lplu_state_pchlan;
         phy->ops.write_phy_reg        = e1000_write_phy_reg_hv;
+        phy->ops.write_phy_reg_locked = e1000_write_phy_reg_hv_locked;
         phy->autoneg_mask             = AUTONEG_ADVERTISE_SPEED_DEFAULT;
 
         phy->id = e1000_phy_unknown;
@@ -313,6 +315,8 @@ static s32 e1000_init_phy_params_ich8lan(struct e1000_hw *hw)
         case IGP03E1000_E_PHY_ID:
                 phy->type = e1000_phy_igp_3;
                 phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT;
+                phy->ops.read_phy_reg_locked = e1000e_read_phy_reg_igp_locked;
+                phy->ops.write_phy_reg_locked = e1000e_write_phy_reg_igp_locked;
                 break;
         case IFE_E_PHY_ID:
         case IFE_PLUS_E_PHY_ID: