ixgbe: add support for disabling link at boot time on 82599

This patch adds support for disabling link during boot time. This
feature was requested by customers and is configurable through the EEPROM.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index c4c5e878b8a96c2ad359163924ecf86133a008ce..0b82d38bc97daf6e67c6cd7a0d65caafa70ccd11 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -1051,6 +1051,14 @@ mac_reset_top:
         */
        hw->mac.cached_autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);
        autoc2 = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
+
+       /* Enable link if disabled in NVM */
+       if (autoc2 & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
+               autoc2 &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
+               IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2);
+               IXGBE_WRITE_FLUSH(hw);
+       }
+
        if (hw->mac.orig_link_settings_stored == false) {
                hw->mac.orig_autoc = hw->mac.cached_autoc;
                hw->mac.orig_autoc2 = autoc2;
@@ -2186,8 +2194,17 @@ static s32 ixgbe_read_eeprom_82599(struct ixgbe_hw *hw,
  **/
 s32 ixgbe_reset_pipeline_82599(struct ixgbe_hw *hw)
 {
-       s32 i, autoc_reg, ret_val;
-       s32 anlp1_reg = 0;
+       s32 ret_val;
+       u32 anlp1_reg = 0;
+       u32 i, autoc_reg, autoc2_reg;
+
+       /* Enable link if disabled in NVM */
+       autoc2_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC2);
+       if (autoc2_reg & IXGBE_AUTOC2_LINK_DISABLE_MASK) {
+               autoc2_reg &= ~IXGBE_AUTOC2_LINK_DISABLE_MASK;
+               IXGBE_WRITE_REG(hw, IXGBE_AUTOC2, autoc2_reg);
+               IXGBE_WRITE_FLUSH(hw);
+       }
 
        autoc_reg = hw->mac.cached_autoc;
        autoc_reg |= IXGBE_AUTOC_AN_RESTART;

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 7480f7b4ac75b34410ea4fab75475de88c9fd0e8..70c6aa3d3f959fc6f86fa032fc874376f714efe9 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -1593,6 +1593,7 @@ enum {
 #define IXGBE_AUTOC2_10G_KR  (0x0 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
 #define IXGBE_AUTOC2_10G_XFI (0x1 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
 #define IXGBE_AUTOC2_10G_SFI (0x2 << IXGBE_AUTOC2_10G_SERIAL_PMA_PMD_SHIFT)
+#define IXGBE_AUTOC2_LINK_DISABLE_MASK        0x70000000
 
 #define IXGBE_MACC_FLU       0x00000001
 #define IXGBE_MACC_FSV_10G   0x00030000