ixgbe/base: Manual AN-37 for troublesome link partners for X550 SFI
Checks
Commit Message
Some SFP link partners exhibit a disinclination to autonegotiate
with X550 configured in SFI mode. This patch enables a manual AN-37
restart to work around the problem.
Signed-off-by: Jeff Daly <jeffd@silicom-usa.com>
---
drivers/net/ixgbe/base/ixgbe_type.h | 1 +
drivers/net/ixgbe/base/ixgbe_x550.c | 51 +++++++++++++++++++++++++++++
2 files changed, 52 insertions(+)
@@ -4260,6 +4260,7 @@ struct ixgbe_hw {
#define IXGBE_KRM_PMD_FLX_MASK_ST20(P) ((P) ? 0x9054 : 0x5054)
#define IXGBE_KRM_TX_COEFF_CTRL_1(P) ((P) ? 0x9520 : 0x5520)
#define IXGBE_KRM_RX_ANA_CTL(P) ((P) ? 0x9A00 : 0x5A00)
+#define IXGBE_KRM_FLX_TMRS_CTRL_ST31(P) ((P) ? 0x9180 : 0x5180)
#define IXGBE_KRM_PMD_FLX_MASK_ST20_SFI_10G_DA ~(0x3 << 20)
#define IXGBE_KRM_PMD_FLX_MASK_ST20_SFI_10G_SR (1u << 20)
@@ -2676,6 +2676,57 @@ STATIC s32 ixgbe_setup_sfi_x550a(struct ixgbe_hw *hw, ixgbe_link_speed *speed)
IXGBE_KRM_PMD_FLX_MASK_ST20(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+ /* change mode enforcement rules to hybrid */
+ status = mac->ops.read_iosf_sb_reg(hw,
+ IXGBE_KRM_FLX_TMRS_CTRL_ST31(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val);
+ status |= 0x0400;
+
+ status = mac->ops.write_iosf_sb_reg(hw,
+ IXGBE_KRM_FLX_TMRS_CTRL_ST31(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+
+ /* manually control the config */
+ status = mac->ops.read_iosf_sb_reg(hw,
+ IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val);
+ status |= 0x20002240;
+
+ status = mac->ops.write_iosf_sb_reg(hw,
+ IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+
+ /* move the AN base page values */
+ status = mac->ops.read_iosf_sb_reg(hw,
+ IXGBE_KRM_PCS_KX_AN(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val);
+ status |= 0x1;
+
+ status = mac->ops.write_iosf_sb_reg(hw,
+ IXGBE_KRM_PCS_KX_AN(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+
+ /* set the AN37 over CB mode */
+ status = mac->ops.read_iosf_sb_reg(hw,
+ IXGBE_KRM_AN_CNTL_4(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val);
+ status |= 0x20000000;
+
+ status = mac->ops.write_iosf_sb_reg(hw,
+ IXGBE_KRM_AN_CNTL_4(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+
+ /* restart AN manually */
+ status = mac->ops.read_iosf_sb_reg(hw,
+ IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val);
+ status |= IXGBE_KRM_LINK_CTRL_1_TETH_AN_RESTART;
+
+ status = mac->ops.write_iosf_sb_reg(hw,
+ IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
+ IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
+
+
/* Toggle port SW reset by AN reset. */
status = ixgbe_restart_an_internal_phy_x550em(hw);