[PATCH V2] Add ethtool to mii advertisment conversion helpers

[PATCH V2] Add ethtool to mii advertisment conversion helpers

[Matt Carlson]

Translating between ethtool advertisement settings and MII
advertisements are common operations for ethernet drivers.  This patch
adds a set of helper functions that implements the conversion.  The
patch then modifies a couple of the drivers to use the new functions.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
---

Changes in V2:
	* Added '#include <linux/ethtool.h>' to mii.h

 drivers/net/ethernet/broadcom/bnx2.c |   15 +---
 drivers/net/ethernet/broadcom/tg3.c  |   53 +++--------
 drivers/net/ethernet/sun/niu.c       |   15 +---
 drivers/net/mii.c                    |   48 ++--------
 drivers/net/phy/phy_device.c         |   20 +----
 include/linux/mii.h                  |  166 ++++++++++++++++++++++++++++++++++
 6 files changed, 197 insertions(+), 120 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index 32d1f92..e82b981 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -2064,21 +2064,12 @@ __acquires(&bp->phy_lock)
 		bnx2_read_phy(bp, MII_CTRL1000, &adv1000_reg);
 		adv1000_reg &= PHY_ALL_1000_SPEED;
 
-		if (bp->advertising & ADVERTISED_10baseT_Half)
-			new_adv_reg |= ADVERTISE_10HALF;
-		if (bp->advertising & ADVERTISED_10baseT_Full)
-			new_adv_reg |= ADVERTISE_10FULL;
-		if (bp->advertising & ADVERTISED_100baseT_Half)
-			new_adv_reg |= ADVERTISE_100HALF;
-		if (bp->advertising & ADVERTISED_100baseT_Full)
-			new_adv_reg |= ADVERTISE_100FULL;
-		if (bp->advertising & ADVERTISED_1000baseT_Full)
-			new_adv1000_reg |= ADVERTISE_1000FULL;
-
+		new_adv_reg = ethtool_adv_to_mii_100bt(bp->advertising);
 		new_adv_reg |= ADVERTISE_CSMA;
-
 		new_adv_reg |= bnx2_phy_get_pause_adv(bp);
 
+		new_adv1000_reg |= ethtool_adv_to_mii_1000T(bp->advertising);
+
 		if ((adv1000_reg != new_adv1000_reg) ||
 			(adv_reg != new_adv_reg) ||
 			((bmcr & BMCR_ANENABLE) == 0)) {
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index cd36234..b329459 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -3594,15 +3594,7 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
 	u32 val, new_adv;
 
 	new_adv = ADVERTISE_CSMA;
-	if (advertise & ADVERTISED_10baseT_Half)
-		new_adv |= ADVERTISE_10HALF;
-	if (advertise & ADVERTISED_10baseT_Full)
-		new_adv |= ADVERTISE_10FULL;
-	if (advertise & ADVERTISED_100baseT_Half)
-		new_adv |= ADVERTISE_100HALF;
-	if (advertise & ADVERTISED_100baseT_Full)
-		new_adv |= ADVERTISE_100FULL;
-
+	new_adv |= ethtool_adv_to_mii_100bt(advertise);
 	new_adv |= tg3_advert_flowctrl_1000T(flowctrl);
 
 	err = tg3_writephy(tp, MII_ADVERTISE, new_adv);
@@ -3612,11 +3604,7 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
 	if (tp->phy_flags & TG3_PHYFLG_10_100_ONLY)
 		goto done;
 
-	new_adv = 0;
-	if (advertise & ADVERTISED_1000baseT_Half)
-		new_adv |= ADVERTISE_1000HALF;
-	if (advertise & ADVERTISED_1000baseT_Full)
-		new_adv |= ADVERTISE_1000FULL;
+	new_adv = ethtool_adv_to_mii_1000T(advertise);
 
 	if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0 ||
 	    tp->pci_chip_rev_id == CHIPREV_ID_5701_B0)
@@ -3790,14 +3778,7 @@ static int tg3_copper_is_advertising_all(struct tg3 *tp, u32 mask)
 {
 	u32 adv_reg, all_mask = 0;
 
-	if (mask & ADVERTISED_10baseT_Half)
-		all_mask |= ADVERTISE_10HALF;
-	if (mask & ADVERTISED_10baseT_Full)
-		all_mask |= ADVERTISE_10FULL;
-	if (mask & ADVERTISED_100baseT_Half)
-		all_mask |= ADVERTISE_100HALF;
-	if (mask & ADVERTISED_100baseT_Full)
-		all_mask |= ADVERTISE_100FULL;
+	all_mask = ethtool_adv_to_mii_100bt(mask);
 
 	if (tg3_readphy(tp, MII_ADVERTISE, &adv_reg))
 		return 0;
@@ -3808,11 +3789,7 @@ static int tg3_copper_is_advertising_all(struct tg3 *tp, u32 mask)
 	if (!(tp->phy_flags & TG3_PHYFLG_10_100_ONLY)) {
 		u32 tg3_ctrl;
 
-		all_mask = 0;
-		if (mask & ADVERTISED_1000baseT_Half)
-			all_mask |= ADVERTISE_1000HALF;
-		if (mask & ADVERTISED_1000baseT_Full)
-			all_mask |= ADVERTISE_1000FULL;
+		all_mask = ethtool_adv_to_mii_1000T(mask);
 
 		if (tg3_readphy(tp, MII_CTRL1000, &tg3_ctrl))
 			return 0;
@@ -4903,23 +4880,19 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
 	    (tp->phy_flags & TG3_PHYFLG_PARALLEL_DETECT)) {
 		/* do nothing, just check for link up at the end */
 	} else if (tp->link_config.autoneg == AUTONEG_ENABLE) {
-		u32 adv, new_adv;
+		u32 adv, newadv;
 
 		err |= tg3_readphy(tp, MII_ADVERTISE, &adv);
-		new_adv = adv & ~(ADVERTISE_1000XFULL | ADVERTISE_1000XHALF |
-				  ADVERTISE_1000XPAUSE |
-				  ADVERTISE_1000XPSE_ASYM |
-				  ADVERTISE_SLCT);
-
-		new_adv |= tg3_advert_flowctrl_1000X(tp->link_config.flowctrl);
+		newadv = adv & ~(ADVERTISE_1000XFULL | ADVERTISE_1000XHALF |
+				 ADVERTISE_1000XPAUSE |
+				 ADVERTISE_1000XPSE_ASYM |
+				 ADVERTISE_SLCT);
 
-		if (tp->link_config.advertising & ADVERTISED_1000baseT_Half)
-			new_adv |= ADVERTISE_1000XHALF;
-		if (tp->link_config.advertising & ADVERTISED_1000baseT_Full)
-			new_adv |= ADVERTISE_1000XFULL;
+		newadv |= tg3_advert_flowctrl_1000X(tp->link_config.flowctrl);
+		newadv |= ethtool_adv_to_mii_1000X(tp->link_config.advertising);
 
-		if ((new_adv != adv) || !(bmcr & BMCR_ANENABLE)) {
-			tg3_writephy(tp, MII_ADVERTISE, new_adv);
+		if ((newadv != adv) || !(bmcr & BMCR_ANENABLE)) {
+			tg3_writephy(tp, MII_ADVERTISE, newadv);
 			bmcr |= BMCR_ANENABLE | BMCR_ANRESTART;
 			tg3_writephy(tp, MII_BMCR, bmcr);
 
diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index 3ebeb9d..9997be5 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -1151,19 +1151,8 @@ static int link_status_mii(struct niu *np, int *link_up_p)
 		supported |= SUPPORTED_1000baseT_Full;
 	lp->supported = supported;
 
-	advertising = 0;
-	if (advert & ADVERTISE_10HALF)
-		advertising |= ADVERTISED_10baseT_Half;
-	if (advert & ADVERTISE_10FULL)
-		advertising |= ADVERTISED_10baseT_Full;
-	if (advert & ADVERTISE_100HALF)
-		advertising |= ADVERTISED_100baseT_Half;
-	if (advert & ADVERTISE_100FULL)
-		advertising |= ADVERTISED_100baseT_Full;
-	if (ctrl1000 & ADVERTISE_1000HALF)
-		advertising |= ADVERTISED_1000baseT_Half;
-	if (ctrl1000 & ADVERTISE_1000FULL)
-		advertising |= ADVERTISED_1000baseT_Full;
+	advertising = mii_adv_to_ethtool_100bt(advert);
+	advertising |= mii_adv_to_ethtool_1000T(ctrl1000);
 
 	if (bmcr & BMCR_ANENABLE) {
 		int neg, neg1000;
diff --git a/drivers/net/mii.c b/drivers/net/mii.c
index c62e781..d0a2962 100644
--- a/drivers/net/mii.c
+++ b/drivers/net/mii.c
@@ -41,20 +41,8 @@ static u32 mii_get_an(struct mii_if_info *mii, u16 addr)
 	advert = mii->mdio_read(mii->dev, mii->phy_id, addr);
 	if (advert & LPA_LPACK)
 		result |= ADVERTISED_Autoneg;
-	if (advert & ADVERTISE_10HALF)
-		result |= ADVERTISED_10baseT_Half;
-	if (advert & ADVERTISE_10FULL)
-		result |= ADVERTISED_10baseT_Full;
-	if (advert & ADVERTISE_100HALF)
-		result |= ADVERTISED_100baseT_Half;
-	if (advert & ADVERTISE_100FULL)
-		result |= ADVERTISED_100baseT_Full;
-	if (advert & ADVERTISE_PAUSE_CAP)
-		result |= ADVERTISED_Pause;
-	if (advert & ADVERTISE_PAUSE_ASYM)
-		result |= ADVERTISED_Asym_Pause;
-
-	return result;
+
+	return result | mii_adv_to_ethtool_100bt(advert);
 }
 
 /**
@@ -104,19 +92,13 @@ int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
 		ecmd->autoneg = AUTONEG_ENABLE;
 
 		ecmd->advertising |= mii_get_an(mii, MII_ADVERTISE);
-		if (ctrl1000 & ADVERTISE_1000HALF)
-			ecmd->advertising |= ADVERTISED_1000baseT_Half;
-		if (ctrl1000 & ADVERTISE_1000FULL)
-			ecmd->advertising |= ADVERTISED_1000baseT_Full;
+		if (mii->supports_gmii)
+			ecmd->advertising |= mii_adv_to_ethtool_1000T(ctrl1000);
 
 		if (bmsr & BMSR_ANEGCOMPLETE) {
 			ecmd->lp_advertising = mii_get_an(mii, MII_LPA);
-			if (stat1000 & LPA_1000HALF)
-				ecmd->lp_advertising |=
-					ADVERTISED_1000baseT_Half;
-			if (stat1000 & LPA_1000FULL)
-				ecmd->lp_advertising |=
-					ADVERTISED_1000baseT_Full;
+			ecmd->lp_advertising |=
+					     mii_lpa_to_ethtool_1000T(stat1000);
 		} else {
 			ecmd->lp_advertising = 0;
 		}
@@ -204,20 +186,10 @@ int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
 			advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
 			tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
 		}
-		if (ecmd->advertising & ADVERTISED_10baseT_Half)
-			tmp |= ADVERTISE_10HALF;
-		if (ecmd->advertising & ADVERTISED_10baseT_Full)
-			tmp |= ADVERTISE_10FULL;
-		if (ecmd->advertising & ADVERTISED_100baseT_Half)
-			tmp |= ADVERTISE_100HALF;
-		if (ecmd->advertising & ADVERTISED_100baseT_Full)
-			tmp |= ADVERTISE_100FULL;
-		if (mii->supports_gmii) {
-			if (ecmd->advertising & ADVERTISED_1000baseT_Half)
-				tmp2 |= ADVERTISE_1000HALF;
-			if (ecmd->advertising & ADVERTISED_1000baseT_Full)
-				tmp2 |= ADVERTISE_1000FULL;
-		}
+		tmp |= ethtool_adv_to_mii_100bt(ecmd->advertising);
+
+		if (mii->supports_gmii)
+			tmp2 |= ethtool_adv_to_mii_1000T(ecmd->advertising);
 		if (advert != tmp) {
 			mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
 			mii->advertising = tmp;
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 83a5a5a..edb905f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -563,20 +563,9 @@ static int genphy_config_advert(struct phy_device *phydev)
 	if (adv < 0)
 		return adv;
 
-	adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | 
+	adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
 		 ADVERTISE_PAUSE_ASYM);
-	if (advertise & ADVERTISED_10baseT_Half)
-		adv |= ADVERTISE_10HALF;
-	if (advertise & ADVERTISED_10baseT_Full)
-		adv |= ADVERTISE_10FULL;
-	if (advertise & ADVERTISED_100baseT_Half)
-		adv |= ADVERTISE_100HALF;
-	if (advertise & ADVERTISED_100baseT_Full)
-		adv |= ADVERTISE_100FULL;
-	if (advertise & ADVERTISED_Pause)
-		adv |= ADVERTISE_PAUSE_CAP;
-	if (advertise & ADVERTISED_Asym_Pause)
-		adv |= ADVERTISE_PAUSE_ASYM;
+	adv |= ethtool_adv_to_mii_100bt(advertise);
 
 	if (adv != oldadv) {
 		err = phy_write(phydev, MII_ADVERTISE, adv);
@@ -595,10 +584,7 @@ static int genphy_config_advert(struct phy_device *phydev)
 			return adv;
 
 		adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
-		if (advertise & SUPPORTED_1000baseT_Half)
-			adv |= ADVERTISE_1000HALF;
-		if (advertise & SUPPORTED_1000baseT_Full)
-			adv |= ADVERTISE_1000FULL;
+		adv |= ethtool_adv_to_mii_1000T(advertise);
 
 		if (adv != oldadv) {
 			err = phy_write(phydev, MII_CTRL1000, adv);
diff --git a/include/linux/mii.h b/include/linux/mii.h
index 2774823..6697b91 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -9,6 +9,7 @@
 #define __LINUX_MII_H__
 
 #include <linux/types.h>
+#include <linux/ethtool.h>
 
 /* Generic MII registers. */
 #define MII_BMCR		0x00	/* Basic mode control register */
@@ -240,6 +241,171 @@ static inline unsigned int mii_duplex (unsigned int duplex_lock,
 }
 
 /**
+ * ethtool_adv_to_mii_100bt
+ * @ethadv: the ethtool advertisement settings
+ *
+ * A small helper function that translates ethtool advertisement
+ * settings to phy autonegotiation advertisements for the
+ * MII_ADVERTISE register.
+ */
+static inline u32 ethtool_adv_to_mii_100bt(u32 ethadv)
+{
+	u32 result = 0;
+
+	if (ethadv & ADVERTISED_10baseT_Half)
+		result |= ADVERTISE_10HALF;
+	if (ethadv & ADVERTISED_10baseT_Full)
+		result |= ADVERTISE_10FULL;
+	if (ethadv & ADVERTISED_100baseT_Half)
+		result |= ADVERTISE_100HALF;
+	if (ethadv & ADVERTISED_100baseT_Full)
+		result |= ADVERTISE_100FULL;
+	if (ethadv & ADVERTISED_Pause)
+		result |= ADVERTISE_PAUSE_CAP;
+	if (ethadv & ADVERTISED_Asym_Pause)
+		result |= ADVERTISE_PAUSE_ASYM;
+
+	return result;
+}
+
+/**
+ * mii_adv_to_ethtool_100bt
+ * @adv: value of the MII_ADVERTISE register
+ *
+ * A small helper function that translates MII_ADVERTISE bits
+ * to ethtool advertisement settings.
+ */
+static inline u32 mii_adv_to_ethtool_100bt(u32 adv)
+{
+	u32 result = 0;
+
+	if (adv & ADVERTISE_10HALF)
+		result |= ADVERTISED_10baseT_Half;
+	if (adv & ADVERTISE_10FULL)
+		result |= ADVERTISED_10baseT_Full;
+	if (adv & ADVERTISE_100HALF)
+		result |= ADVERTISED_100baseT_Half;
+	if (adv & ADVERTISE_100FULL)
+		result |= ADVERTISED_100baseT_Full;
+	if (adv & ADVERTISE_PAUSE_CAP)
+		result |= ADVERTISED_Pause;
+	if (adv & ADVERTISE_PAUSE_ASYM)
+		result |= ADVERTISED_Asym_Pause;
+
+	return result;
+}
+
+/**
+ * ethtool_adv_to_mii_1000T
+ * @ethadv: the ethtool advertisement settings
+ *
+ * A small helper function that translates ethtool advertisement
+ * settings to phy autonegotiation advertisements for the
+ * MII_CTRL1000 register when in 1000T mode.
+ */
+static inline u32 ethtool_adv_to_mii_1000T(u32 ethadv)
+{
+	u32 result = 0;
+
+	if (ethadv & ADVERTISED_1000baseT_Half)
+		result |= ADVERTISE_1000HALF;
+	if (ethadv & ADVERTISED_1000baseT_Full)
+		result |= ADVERTISE_1000FULL;
+
+	return result;
+}
+
+/**
+ * mii_adv_to_ethtool_1000T
+ * @adv: value of the MII_CTRL1000 register
+ *
+ * A small helper function that translates MII_CTRL1000
+ * bits, when in 1000Base-T mode, to ethtool
+ * advertisement settings.
+ */
+static inline u32 mii_adv_to_ethtool_1000T(u32 adv)
+{
+	u32 result = 0;
+
+	if (adv & ADVERTISE_1000HALF)
+		result |= ADVERTISED_1000baseT_Half;
+	if (adv & ADVERTISE_1000FULL)
+		result |= ADVERTISED_1000baseT_Full;
+
+	return result;
+}
+
+#define mii_lpa_to_ethtool_100bt(lpa)	mii_adv_to_ethtool_100bt(lpa)
+
+/**
+ * mii_lpa_to_ethtool_1000T
+ * @adv: value of the MII_STAT1000 register
+ *
+ * A small helper function that translates MII_STAT1000
+ * bits, when in 1000Base-T mode, to ethtool
+ * advertisement settings.
+ */
+static inline u32 mii_lpa_to_ethtool_1000T(u32 lpa)
+{
+	u32 result = 0;
+
+	if (lpa & LPA_1000HALF)
+		result |= ADVERTISED_1000baseT_Half;
+	if (lpa & LPA_1000FULL)
+		result |= ADVERTISED_1000baseT_Full;
+
+	return result;
+}
+
+/**
+ * ethtool_adv_to_mii_1000X
+ * @ethadv: the ethtool advertisement settings
+ *
+ * A small helper function that translates ethtool advertisement
+ * settings to phy autonegotiation advertisements for the
+ * MII_CTRL1000 register when in 1000Base-X mode.
+ */
+static inline u32 ethtool_adv_to_mii_1000X(u32 ethadv)
+{
+	u32 result = 0;
+
+	if (ethadv & ADVERTISED_1000baseT_Half)
+		result |= ADVERTISE_1000XHALF;
+	if (ethadv & ADVERTISED_1000baseT_Full)
+		result |= ADVERTISE_1000XFULL;
+	if (ethadv & ADVERTISED_Pause)
+		result |= ADVERTISE_1000XPAUSE;
+	if (ethadv & ADVERTISED_Asym_Pause)
+		result |= ADVERTISE_1000XPSE_ASYM;
+
+	return result;
+}
+
+/**
+ * mii_adv_to_ethtool_1000X
+ * @adv: value of the MII_CTRL1000 register
+ *
+ * A small helper function that translates MII_CTRL1000
+ * bits, when in 1000Base-X mode, to ethtool
+ * advertisement settings.
+ */
+static inline u32 mii_adv_to_ethtool_1000X(u32 adv)
+{
+	u32 result = 0;
+
+	if (adv & ADVERTISE_1000XHALF)
+		result |= ADVERTISED_1000baseT_Half;
+	if (adv & ADVERTISE_1000XFULL)
+		result |= ADVERTISED_1000baseT_Full;
+	if (adv & ADVERTISE_1000XPAUSE)
+		result |= ADVERTISED_Pause;
+	if (adv & ADVERTISE_1000XPSE_ASYM)
+		result |= ADVERTISED_Asym_Pause;
+
+	return result;
+}
+
+/**
  * mii_advertise_flowctrl - get flow control advertisement flags
  * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
  */
-- 
1.7.3.4

Re: [PATCH V2] Add ethtool to mii advertisment conversion helpers

[David Miller]

From: "Matt Carlson" <mcarlson@broadcom.com>
Date: Wed, 16 Nov 2011 15:27:37 -0800

> Translating between ethtool advertisement settings and MII
> advertisements are common operations for ethernet drivers.  This patch
> adds a set of helper functions that implements the conversion.  The
> patch then modifies a couple of the drivers to use the new functions.
> 
> Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
> Signed-off-by: Michael Chan <mchan@broadcom.com>

Looks better, applied, thanks :)

Re: [PATCH V2] Add ethtool to mii advertisment conversion helpers

[Eric Dumazet]

Le mercredi 16 novembre 2011 à 18:40 -0500, David Miller a écrit :
> From: "Matt Carlson" <mcarlson@broadcom.com>
> Date: Wed, 16 Nov 2011 15:27:37 -0800
> 
> > Translating between ethtool advertisement settings and MII
> > advertisements are common operations for ethernet drivers.  This patch
> > adds a set of helper functions that implements the conversion.  The
> > patch then modifies a couple of the drivers to use the new functions.
> > 
> > Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
> > Signed-off-by: Michael Chan <mchan@broadcom.com>
> 
> Looks better, applied, thanks :)

For an unknown reason I had to revert this commit to make my tg3 working
again on my laptop connected with a cross cable to one IGB NIC.

Before my revert, link was constantly flapping

(Should be running at 1000Mbps, full duplex)

09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5755M Gigabit Ethernet PCI Express (rev 02)
	Subsystem: Dell Device 01f9
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 45
	Region 0: Memory at f1ef0000 (64-bit, non-prefetchable) [size=64K]
	Expansion ROM at <ignored> [disabled]
	Capabilities: [48] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=1 PME-
	Capabilities: [50] Vital Product Data
		Product Name: Broadcom NetXtreme Gigabit Ethernet Controller
		Read-only fields:
			[PN] Part number: BCM95755m
			[EC] Engineering changes: 01f9.004
			[SN] Serial number: 0123456789
			[MN] Manufacture ID: 31 34 65 34
			[RV] Reserved: checksum good, 28 byte(s) reserved
		Read/write fields:
			[YA] Asset tag: XYZ01234567
			[RW] Read-write area: 107 byte(s) free
		End
	Capabilities: [58] Vendor Specific Information: Len=78 <?>
	Capabilities: [e8] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee0300c  Data: 41b1
	Capabilities: [d0] Express (v1) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited
			ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
			MaxPayload 128 bytes, MaxReadReq 4096 bytes
		DevSta:	CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <64us
			ClockPM+ Surprise- LLActRep- BwNot-
		LnkCtl:	ASPM L0s Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
			ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
	Capabilities: [100 v1] Advanced Error Reporting
		UESta:	DLP- SDES- TLP- FCP- CmpltTO+ CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
		UESvrt:	DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
		CESta:	RxErr+ BadTLP+ BadDLLP+ Rollover- Timeout+ NonFatalErr+
		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
		AERCap:	First Error Pointer: 0e, GenCap+ CGenEn- ChkCap+ ChkEn-
	Capabilities: [13c v1] Virtual Channel
		Caps:	LPEVC=0 RefClk=100ns PATEntryBits=1
		Arb:	Fixed- WRR32- WRR64- WRR128-
		Ctrl:	ArbSelect=Fixed
		Status:	InProgress-
		VC0:	Caps:	PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
			Arb:	Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
			Ctrl:	Enable+ ID=0 ArbSelect=Fixed TC/VC=01
			Status:	NegoPending- InProgress-
	Capabilities: [160 v1] Device Serial Number 00-21-70-ff-fe-b0-e4-89
	Capabilities: [16c v1] Power Budgeting <?>
	Kernel driver in use: tg3
	Kernel modules: tg3


For reference, the revert on tg3 :

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 024ca1d..365cd47 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -3594,7 +3594,15 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
 	u32 val, new_adv;
 
 	new_adv = ADVERTISE_CSMA;
-	new_adv |= ethtool_adv_to_mii_100bt(advertise);
+	if (advertise & ADVERTISED_10baseT_Half)
+		new_adv |= ADVERTISE_10HALF;
+	if (advertise & ADVERTISED_10baseT_Full)
+		new_adv |= ADVERTISE_10FULL;
+	if (advertise & ADVERTISED_100baseT_Half)
+		new_adv |= ADVERTISE_100HALF;
+	if (advertise & ADVERTISED_100baseT_Full)
+		new_adv |= ADVERTISE_100FULL;
+
 	new_adv |= tg3_advert_flowctrl_1000T(flowctrl);
 
 	err = tg3_writephy(tp, MII_ADVERTISE, new_adv);
@@ -3604,7 +3612,11 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
 	if (tp->phy_flags & TG3_PHYFLG_10_100_ONLY)
 		goto done;
 
-	new_adv = ethtool_adv_to_mii_1000T(advertise);
+	new_adv = 0;
+	if (advertise & ADVERTISED_1000baseT_Half)
+		new_adv |= ADVERTISE_1000HALF;
+	if (advertise & ADVERTISED_1000baseT_Full)
+		new_adv |= ADVERTISE_1000FULL;
 
 	if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0 ||
 	    tp->pci_chip_rev_id == CHIPREV_ID_5701_B0)
@@ -3778,7 +3790,14 @@ static int tg3_copper_is_advertising_all(struct tg3 *tp, u32 mask)
 {
 	u32 adv_reg, all_mask = 0;
 
-	all_mask = ethtool_adv_to_mii_100bt(mask);
+	if (mask & ADVERTISED_10baseT_Half)
+		all_mask |= ADVERTISE_10HALF;
+	if (mask & ADVERTISED_10baseT_Full)
+		all_mask |= ADVERTISE_10FULL;
+	if (mask & ADVERTISED_100baseT_Half)
+		all_mask |= ADVERTISE_100HALF;
+	if (mask & ADVERTISED_100baseT_Full)
+		all_mask |= ADVERTISE_100FULL;
 
 	if (tg3_readphy(tp, MII_ADVERTISE, &adv_reg))
 		return 0;
@@ -3789,7 +3808,11 @@ static int tg3_copper_is_advertising_all(struct tg3 *tp, u32 mask)
 	if (!(tp->phy_flags & TG3_PHYFLG_10_100_ONLY)) {
 		u32 tg3_ctrl;
 
-		all_mask = ethtool_adv_to_mii_1000T(mask);
+		all_mask = 0;
+		if (mask & ADVERTISED_1000baseT_Half)
+			all_mask |= ADVERTISE_1000HALF;
+		if (mask & ADVERTISED_1000baseT_Full)
+			all_mask |= ADVERTISE_1000FULL;
 
 		if (tg3_readphy(tp, MII_CTRL1000, &tg3_ctrl))
 			return 0;
@@ -4880,19 +4903,23 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
 	    (tp->phy_flags & TG3_PHYFLG_PARALLEL_DETECT)) {
 		/* do nothing, just check for link up at the end */
 	} else if (tp->link_config.autoneg == AUTONEG_ENABLE) {
-		u32 adv, newadv;
+		u32 adv, new_adv;
 
 		err |= tg3_readphy(tp, MII_ADVERTISE, &adv);
-		newadv = adv & ~(ADVERTISE_1000XFULL | ADVERTISE_1000XHALF |
-				 ADVERTISE_1000XPAUSE |
-				 ADVERTISE_1000XPSE_ASYM |
-				 ADVERTISE_SLCT);
+		new_adv = adv & ~(ADVERTISE_1000XFULL | ADVERTISE_1000XHALF |
+				  ADVERTISE_1000XPAUSE |
+				  ADVERTISE_1000XPSE_ASYM |
+				  ADVERTISE_SLCT);
+
+		new_adv |= tg3_advert_flowctrl_1000X(tp->link_config.flowctrl);
 
-		newadv |= tg3_advert_flowctrl_1000X(tp->link_config.flowctrl);
-		newadv |= ethtool_adv_to_mii_1000X(tp->link_config.advertising);
+		if (tp->link_config.advertising & ADVERTISED_1000baseT_Half)
+			new_adv |= ADVERTISE_1000XHALF;
+		if (tp->link_config.advertising & ADVERTISED_1000baseT_Full)
+			new_adv |= ADVERTISE_1000XFULL;
 
-		if ((newadv != adv) || !(bmcr & BMCR_ANENABLE)) {
-			tg3_writephy(tp, MII_ADVERTISE, newadv);
+		if ((new_adv != adv) || !(bmcr & BMCR_ANENABLE)) {
+			tg3_writephy(tp, MII_ADVERTISE, new_adv);
 			bmcr |= BMCR_ANENABLE | BMCR_ANRESTART;
 			tg3_writephy(tp, MII_BMCR, bmcr);
 

Re: [PATCH V2] Add ethtool to mii advertisment conversion helpers

[David Miller]

From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Sun, 20 Nov 2011 22:11:37 +0100

> For reference, the revert on tg3 :
> 
> diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
> index 024ca1d..365cd47 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -3594,7 +3594,15 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
>  	u32 val, new_adv;
>  
>  	new_adv = ADVERTISE_CSMA;
> -	new_adv |= ethtool_adv_to_mii_100bt(advertise);
> +	if (advertise & ADVERTISED_10baseT_Half)
> +		new_adv |= ADVERTISE_10HALF;
> +	if (advertise & ADVERTISED_10baseT_Full)
> +		new_adv |= ADVERTISE_10FULL;
> +	if (advertise & ADVERTISED_100baseT_Half)
> +		new_adv |= ADVERTISE_100HALF;
> +	if (advertise & ADVERTISED_100baseT_Full)
> +		new_adv |= ADVERTISE_100FULL;
> +
>  	new_adv |= tg3_advert_flowctrl_1000T(flowctrl);
>  

Well, for one thing the flow control handling is subtly changed here.

ethtool_adv_to_mii_100bt() does it's own setting of the flow control
advertisement bits.  It sets ADVERTISE_PAUSE_CAP and
ADVERTISE_PAUSE_ASYM.

But here in tg3, tg3_advert_flowctrl_1000T() has it's own seperate
logic for setting those bits.

I cannot say for certain that this is what it causing your problems,
but it is clear now that these transformations were not done carefully
enough.