ixgbe: Update the usage of orig_autoc to be more consistent

The orig_autoc variable tracks the original setting of the autonegotiate
state prior to trying a new speed.  The usage is inconsistent and not very
maintainable.  This patch updates the usage to make it more consistent.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 39 insertions, 13 deletions

diff --git a/drivers/net/ixgbe/ixgbe_82598.c b/drivers/net/ixgbe/ixgbe_82598.c
index a8151f25a4d0..361c9d1d0117 100644
--- a/drivers/net/ixgbe/ixgbe_82598.c
+++ b/drivers/net/ixgbe/ixgbe_82598.c
@@ -165,12 +165,19 @@ static s32 ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
                                              bool *autoneg)
 {
         s32 status = 0;
+        u32 autoc = 0;
 
         /*
          * Determine link capabilities based on the stored value of AUTOC,
-         * which represents EEPROM defaults.
+         * which represents EEPROM defaults.  If AUTOC value has not been
+         * stored, use the current register value.
          */
-        switch (hw->mac.orig_autoc & IXGBE_AUTOC_LMS_MASK) {
+        if (hw->mac.orig_link_settings_stored)
+                autoc = hw->mac.orig_autoc;
+        else
+                autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+
+        switch (autoc & IXGBE_AUTOC_LMS_MASK) {
         case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
                 *autoneg = false;
@@ -189,9 +196,9 @@ static s32 ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
         case IXGBE_AUTOC_LMS_KX4_AN:
         case IXGBE_AUTOC_LMS_KX4_AN_1G_AN:
                 *speed = IXGBE_LINK_SPEED_UNKNOWN;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX4_SUPP)
+                if (autoc & IXGBE_AUTOC_KX4_SUPP)
                         *speed |= IXGBE_LINK_SPEED_10GB_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX_SUPP)
+                if (autoc & IXGBE_AUTOC_KX_SUPP)
                         *speed |= IXGBE_LINK_SPEED_1GB_FULL;
                 *autoneg = true;
                 break;
diff --git a/drivers/net/ixgbe/ixgbe_82599.c b/drivers/net/ixgbe/ixgbe_82599.c
index 72a0d27a19af..50b399c1e87f 100644
--- a/drivers/net/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ixgbe/ixgbe_82599.c
@@ -221,8 +221,19 @@ s32 ixgbe_get_link_capabilities_82599(struct ixgbe_hw *hw,
                                       bool *negotiation)
 {
         s32 status = 0;
+        u32 autoc = 0;
 
-        switch (hw->mac.orig_autoc & IXGBE_AUTOC_LMS_MASK) {
+        /*
+         * Determine link capabilities based on the stored value of AUTOC,
+         * which represents EEPROM defaults.  If AUTOC value has not been
+         * stored, use the current register value.
+         */
+        if (hw->mac.orig_link_settings_stored)
+                autoc = hw->mac.orig_autoc;
+        else
+                autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
+
+        switch (autoc & IXGBE_AUTOC_LMS_MASK) {
         case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
                 *speed = IXGBE_LINK_SPEED_1GB_FULL;
                 *negotiation = false;
@@ -246,22 +257,22 @@ s32 ixgbe_get_link_capabilities_82599(struct ixgbe_hw *hw,
         case IXGBE_AUTOC_LMS_KX4_KX_KR:
         case IXGBE_AUTOC_LMS_KX4_KX_KR_1G_AN:
                 *speed = IXGBE_LINK_SPEED_UNKNOWN;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KR_SUPP)
+                if (autoc & IXGBE_AUTOC_KR_SUPP)
                         *speed |= IXGBE_LINK_SPEED_10GB_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX4_SUPP)
+                if (autoc & IXGBE_AUTOC_KX4_SUPP)
                         *speed |= IXGBE_LINK_SPEED_10GB_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX_SUPP)
+                if (autoc & IXGBE_AUTOC_KX_SUPP)
                         *speed |= IXGBE_LINK_SPEED_1GB_FULL;
                 *negotiation = true;
                 break;
 
         case IXGBE_AUTOC_LMS_KX4_KX_KR_SGMII:
                 *speed = IXGBE_LINK_SPEED_100_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KR_SUPP)
+                if (autoc & IXGBE_AUTOC_KR_SUPP)
                         *speed |= IXGBE_LINK_SPEED_10GB_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX4_SUPP)
+                if (autoc & IXGBE_AUTOC_KX4_SUPP)
                         *speed |= IXGBE_LINK_SPEED_10GB_FULL;
-                if (hw->mac.orig_autoc & IXGBE_AUTOC_KX_SUPP)
+                if (autoc & IXGBE_AUTOC_KX_SUPP)
                         *speed |= IXGBE_LINK_SPEED_1GB_FULL;
                 *negotiation = true;
                 break;
@@ -572,6 +583,7 @@ s32 ixgbe_setup_mac_link_speed_82599(struct ixgbe_hw *hw,
         s32 status = 0;
         u32 autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
         u32 autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
+        u32 orig_autoc = 0;
         u32 link_mode = autoc & IXGBE_AUTOC_LMS_MASK;
         u32 pma_pmd_1g = autoc & IXGBE_AUTOC_1G_PMA_PMD_MASK;
         u32 pma_pmd_10g_serial = autoc2 & IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_MASK;
@@ -583,6 +595,13 @@ s32 ixgbe_setup_mac_link_speed_82599(struct ixgbe_hw *hw,
         hw->mac.ops.get_link_capabilities(hw, &link_capabilities, &autoneg);
         speed &= link_capabilities;
 
+        /* Use stored value (EEPROM defaults) of AUTOC to find KR/KX4 support*/
+        if (hw->mac.orig_link_settings_stored)
+                orig_autoc = hw->mac.orig_autoc;
+        else
+                orig_autoc = autoc;
+
+
         if (speed == IXGBE_LINK_SPEED_UNKNOWN) {
                 status = IXGBE_ERR_LINK_SETUP;
         } else if (link_mode == IXGBE_AUTOC_LMS_KX4_KX_KR ||
@@ -591,9 +610,9 @@ s32 ixgbe_setup_mac_link_speed_82599(struct ixgbe_hw *hw,
                 /* Set KX4/KX/KR support according to speed requested */
                 autoc &= ~(IXGBE_AUTOC_KX4_KX_SUPP_MASK | IXGBE_AUTOC_KR_SUPP);
                 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
-                        if (hw->mac.orig_autoc & IXGBE_AUTOC_KX4_SUPP)
+                        if (orig_autoc & IXGBE_AUTOC_KX4_SUPP)
                                 autoc |= IXGBE_AUTOC_KX4_SUPP;
-                        if (hw->mac.orig_autoc & IXGBE_AUTOC_KR_SUPP)
+                        if (orig_autoc & IXGBE_AUTOC_KR_SUPP)
                                 autoc |= IXGBE_AUTOC_KR_SUPP;
                 if (speed & IXGBE_LINK_SPEED_1GB_FULL)
                         autoc |= IXGBE_AUTOC_KX_SUPP;