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ixgbe: Manual AN-37 for troublesome link partners for X550 SFI

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Some (Juniper MX5) 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>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Jeff Daly 2022-07-21 10:10:30 -04:00 committed by Tony Nguyen
parent 03f51719df
commit 565736048b
2 changed files with 56 additions and 3 deletions
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3
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -3712,7 +3712,9 @@ struct ixgbe_info {
#define IXGBE_KRM_LINK_S1(P) ((P) ? 0x8200 : 0x4200)
#define IXGBE_KRM_LINK_CTRL_1(P) ((P) ? 0x820C : 0x420C)
#define IXGBE_KRM_AN_CNTL_1(P) ((P) ? 0x822C : 0x422C)
#define IXGBE_KRM_AN_CNTL_4(P) ((P) ? 0x8238 : 0x4238)
#define IXGBE_KRM_AN_CNTL_8(P) ((P) ? 0x8248 : 0x4248)
#define IXGBE_KRM_PCS_KX_AN(P) ((P) ? 0x9918 : 0x5918)
#define IXGBE_KRM_SGMII_CTRL(P) ((P) ? 0x82A0 : 0x42A0)
#define IXGBE_KRM_LP_BASE_PAGE_HIGH(P) ((P) ? 0x836C : 0x436C)
#define IXGBE_KRM_DSP_TXFFE_STATE_4(P) ((P) ? 0x8634 : 0x4634)
@ -3722,6 +3724,7 @@ struct ixgbe_info {
#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 BIT(20)

56
drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
View File

@ -1721,9 +1721,59 @@ static s32 ixgbe_setup_sfi_x550a(struct ixgbe_hw *hw, ixgbe_link_speed *speed)
return IXGBE_ERR_LINK_SETUP;
}
status = mac->ops.write_iosf_sb_reg(hw,
IXGBE_KRM_PMD_FLX_MASK_ST20(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
(void)mac->ops.write_iosf_sb_reg(hw,
IXGBE_KRM_PMD_FLX_MASK_ST20(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val);
/* change mode enforcement rules to hybrid */
(void)mac->ops.read_iosf_sb_reg(hw,
IXGBE_KRM_FLX_TMRS_CTRL_ST31(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, &reg_val);
reg_val |= 0x0400;
(void)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 */
(void)mac->ops.read_iosf_sb_reg(hw,
IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, &reg_val);
reg_val |= 0x20002240;
(void)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 */
(void)mac->ops.read_iosf_sb_reg(hw,
IXGBE_KRM_PCS_KX_AN(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, &reg_val);
reg_val |= 0x1;
(void)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 */
(void)mac->ops.read_iosf_sb_reg(hw,
IXGBE_KRM_AN_CNTL_4(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, &reg_val);
reg_val |= 0x20000000;
(void)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 */
(void)mac->ops.read_iosf_sb_reg(hw,
IXGBE_KRM_LINK_CTRL_1(hw->bus.lan_id),
IXGBE_SB_IOSF_TARGET_KR_PHY, &reg_val);
reg_val |= IXGBE_KRM_LINK_CTRL_1_TETH_AN_RESTART;
(void)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);