[PATCH net 1/3] amd-xgbe: Add pre/post auto-negotiation phy hooks

[Tom Lendacky]

Add hooks to the driver auto-negotiation (AN) flow to allow the different
phy implementations to perform any steps necessary to improve AN.

Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com>
---
 drivers/net/ethernet/amd/xgbe/xgbe-mdio.c |   16 ++++++++++++++--
 drivers/net/ethernet/amd/xgbe/xgbe.h      |    5 +++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c 
b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
index 072b9f6..e3d361e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
@@ -437,6 +437,9 @@ static void xgbe_an73_disable(struct xgbe_prv_data *pdata)
 
 static void xgbe_an_restart(struct xgbe_prv_data *pdata)
 {
+       if (pdata->phy_if.phy_impl.an_pre)
+               pdata->phy_if.phy_impl.an_pre(pdata);
+
        switch (pdata->an_mode) {
        case XGBE_AN_MODE_CL73:
        case XGBE_AN_MODE_CL73_REDRV:
@@ -453,6 +456,9 @@ static void xgbe_an_restart(struct xgbe_prv_data *pdata)
 
 static void xgbe_an_disable(struct xgbe_prv_data *pdata)
 {
+       if (pdata->phy_if.phy_impl.an_post)
+               pdata->phy_if.phy_impl.an_post(pdata);
+
        switch (pdata->an_mode) {
        case XGBE_AN_MODE_CL73:
        case XGBE_AN_MODE_CL73_REDRV:
@@ -637,11 +643,11 @@ static enum xgbe_an xgbe_an73_incompat_link(struct 
xgbe_prv_data *pdata)
                        return XGBE_AN_NO_LINK;
        }
 
-       xgbe_an73_disable(pdata);
+       xgbe_an_disable(pdata);
 
        xgbe_switch_mode(pdata);
 
-       xgbe_an73_restart(pdata);
+       xgbe_an_restart(pdata);
 
        return XGBE_AN_INCOMPAT_LINK;
 }
@@ -820,6 +826,9 @@ static void xgbe_an37_state_machine(struct xgbe_prv_data 
*pdata)
                pdata->an_result = pdata->an_state;
                pdata->an_state = XGBE_AN_READY;
 
+               if (pdata->phy_if.phy_impl.an_post)
+                       pdata->phy_if.phy_impl.an_post(pdata);
+
                netif_dbg(pdata, link, pdata->netdev, "CL37 AN result: %s\n",
                          xgbe_state_as_string(pdata->an_result));
        }
@@ -903,6 +912,9 @@ static void xgbe_an73_state_machine(struct xgbe_prv_data 
*pdata)
                pdata->kx_state = XGBE_RX_BPA;
                pdata->an_start = 0;
 
+               if (pdata->phy_if.phy_impl.an_post)
+                       pdata->phy_if.phy_impl.an_post(pdata);
+
                netif_dbg(pdata, link, pdata->netdev, "CL73 AN result: %s\n",
                          xgbe_state_as_string(pdata->an_result));
        }
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h 
b/drivers/net/ethernet/amd/xgbe/xgbe.h
index ad102c8..fa0b51e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -833,6 +833,7 @@ struct xgbe_hw_if {
 /* This structure represents implementation specific routines for an
  * implementation of a PHY. All routines are required unless noted below.
  *   Optional routines:
+ *     an_pre, an_post
  *     kr_training_pre, kr_training_post
  */
 struct xgbe_phy_impl_if {
@@ -875,6 +876,10 @@ struct xgbe_phy_impl_if {
        /* Process results of auto-negotiation */
        enum xgbe_mode (*an_outcome)(struct xgbe_prv_data *);
 
+       /* Pre/Post auto-negotiation support */
+       void (*an_pre)(struct xgbe_prv_data *);
+       void (*an_post)(struct xgbe_prv_data *);
+
        /* Pre/Post KR training enablement support */
        void (*kr_training_pre)(struct xgbe_prv_data *);
        void (*kr_training_post)(struct xgbe_prv_data *);