[TG3]: Add 1000T & 1000X flowctl adv helpers

This patch adds two functions designed to convert abstract TX & RX
flow control parameters to 1000-BaseT and 1000-BaseX autonegotiation
advertisements.  Code that uses standard definitions which statically
advertises TX & RX flow control has been replaced with code that
configures the advertisements based on administrator dictated
preferences.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 48 insertions, 14 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b571b20ce6ec..5b83a542660e 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1612,6 +1612,38 @@ static void tg3_link_report(struct tg3 *tp)
         }
 }
 
+static u16 tg3_advert_flowctrl_1000T(u8 flow_ctrl)
+{
+        u16 miireg;
+
+        if ((flow_ctrl & TG3_FLOW_CTRL_TX) && (flow_ctrl & TG3_FLOW_CTRL_RX))
+                miireg = ADVERTISE_PAUSE_CAP;
+        else if (flow_ctrl & TG3_FLOW_CTRL_TX)
+                miireg = ADVERTISE_PAUSE_ASYM;
+        else if (flow_ctrl & TG3_FLOW_CTRL_RX)
+                miireg = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
+        else
+                miireg = 0;
+
+        return miireg;
+}
+
+static u16 tg3_advert_flowctrl_1000X(u8 flow_ctrl)
+{
+        u16 miireg;
+
+        if ((flow_ctrl & TG3_FLOW_CTRL_TX) && (flow_ctrl & TG3_FLOW_CTRL_RX))
+                miireg = ADVERTISE_1000XPAUSE;
+        else if (flow_ctrl & TG3_FLOW_CTRL_TX)
+                miireg = ADVERTISE_1000XPSE_ASYM;
+        else if (flow_ctrl & TG3_FLOW_CTRL_RX)
+                miireg = ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM;
+        else
+                miireg = 0;
+
+        return miireg;
+}
+
 static u8 tg3_resolve_flowctrl_1000T(u16 lcladv, u16 rmtadv)
 {
         u8 cap = 0;
@@ -1764,7 +1796,7 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                                 ~(ADVERTISED_1000baseT_Half |
                                   ADVERTISED_1000baseT_Full);
 
-                new_adv = (ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
+                new_adv = ADVERTISE_CSMA;
                 if (tp->link_config.advertising & ADVERTISED_10baseT_Half)
                         new_adv |= ADVERTISE_10HALF;
                 if (tp->link_config.advertising & ADVERTISED_10baseT_Full)
@@ -1773,6 +1805,9 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                         new_adv |= ADVERTISE_100HALF;
                 if (tp->link_config.advertising & ADVERTISED_100baseT_Full)
                         new_adv |= ADVERTISE_100FULL;
+
+                new_adv |= tg3_advert_flowctrl_1000T(tp->link_config.flowctrl);
+
                 tg3_writephy(tp, MII_ADVERTISE, new_adv);
 
                 if (tp->link_config.advertising &
@@ -1792,9 +1827,11 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                         tg3_writephy(tp, MII_TG3_CTRL, 0);
                 }
         } else {
+                new_adv = tg3_advert_flowctrl_1000T(tp->link_config.flowctrl);
+                new_adv |= ADVERTISE_CSMA;
+
                 /* Asking for a specific link mode. */
                 if (tp->link_config.speed == SPEED_1000) {
-                        new_adv = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP;
                         tg3_writephy(tp, MII_ADVERTISE, new_adv);
 
                         if (tp->link_config.duplex == DUPLEX_FULL)
@@ -1805,11 +1842,7 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                             tp->pci_chip_rev_id == CHIPREV_ID_5701_B0)
                                 new_adv |= (MII_TG3_CTRL_AS_MASTER |
                                             MII_TG3_CTRL_ENABLE_AS_MASTER);
-                        tg3_writephy(tp, MII_TG3_CTRL, new_adv);
                 } else {
-                        tg3_writephy(tp, MII_TG3_CTRL, 0);
-
-                        new_adv = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP;
                         if (tp->link_config.speed == SPEED_100) {
                                 if (tp->link_config.duplex == DUPLEX_FULL)
                                         new_adv |= ADVERTISE_100FULL;
@@ -1822,7 +1855,11 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                                         new_adv |= ADVERTISE_10HALF;
                         }
                         tg3_writephy(tp, MII_ADVERTISE, new_adv);
+
+                        new_adv = 0;
                 }
+
+                tg3_writephy(tp, MII_TG3_CTRL, new_adv);
         }
 
         if (tp->link_config.autoneg == AUTONEG_DISABLE &&
@@ -2118,17 +2155,15 @@ static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset)
 
                 if (tg3_readphy(tp, MII_ADVERTISE, &local_adv))
                         local_adv = 0;
-                local_adv &= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 
                 if (tg3_readphy(tp, MII_LPA, &remote_adv))
                         remote_adv = 0;
 
-                remote_adv &= (LPA_PAUSE_CAP | LPA_PAUSE_ASYM);
-
-                /* If we are not advertising full pause capability,
-                 * something is wrong.  Bring the link down and reconfigure.
+                /* If we are not advertising what has been requested,
+                 * bring the link down and reconfigure.
                  */
-                if (local_adv != ADVERTISE_PAUSE_CAP) {
+                if (local_adv !=
+                    tg3_advert_flowctrl_1000T(tp->link_config.flowctrl)) {
                         current_link_up = 0;
                 } else {
                         tg3_setup_flow_control(tp, local_adv, remote_adv);
@@ -2973,8 +3008,7 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
                                   ADVERTISE_1000XPSE_ASYM |
                                   ADVERTISE_SLCT);
 
-                /* Always advertise symmetric PAUSE just like copper */
-                new_adv |= ADVERTISE_1000XPAUSE;
+                new_adv |= tg3_advert_flowctrl_1000X(tp->link_config.flowctrl);
 
                 if (tp->link_config.advertising & ADVERTISED_1000baseT_Half)
                         new_adv |= ADVERTISE_1000XHALF;