diff mbox series

[net-next,2/2] ixgbe: Manual AN-37 for troublesome link partners for X550 SFI

Message ID 20220818223402.1294091-3-anthony.l.nguyen@intel.com (mailing list archive)
State Accepted
Commit 565736048bd5f9888990569993c6b6bfdf6dcb6d
Delegated to: Netdev Maintainers
Headers show
Series Intel Wired LAN Driver Updates 2022-08-18 (ixgbe) | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1786 this patch: 1786
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1786 this patch: 1786
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 78 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Tony Nguyen Aug. 18, 2022, 10:34 p.m. UTC 
From: Jeff Daly <jeffd@silicom-usa.com>

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>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_type.h |  3 +
 drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 56 ++++++++++++++++++-
 2 files changed, 56 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 7f7ea468ffa9..2b00db92b08f 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -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)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
index 35c2b9b8bd19..aa4bf6c9a2f7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
@@ -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);