cxgb3 - MAC workaround update

Update the MAC workaround to deal with switches that do not
honor pause frames.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 12 insertions, 11 deletions

diff --git a/drivers/net/cxgb3/common.h b/drivers/net/cxgb3/common.h
index 2129210a67c1..1746003eb46a 100644
--- a/drivers/net/cxgb3/common.h
+++ b/drivers/net/cxgb3/common.h
@@ -507,6 +507,7 @@ struct cmac {
         unsigned int tx_xcnt;
         u64 tx_mcnt;
         unsigned int rx_xcnt;
+        unsigned int rx_ocnt;
         u64 rx_mcnt;
         unsigned int toggle_cnt;
         unsigned int txen;
diff --git a/drivers/net/cxgb3/xgmac.c b/drivers/net/cxgb3/xgmac.c
index c302b1a30cba..1d1c3919ab66 100644
--- a/drivers/net/cxgb3/xgmac.c
+++ b/drivers/net/cxgb3/xgmac.c
@@ -437,12 +437,13 @@ int t3_mac_enable(struct cmac *mac, int which)
         struct mac_stats *s = &mac->stats;
         
         if (which & MAC_DIRECTION_TX) {
-                t3_write_reg(adap, A_XGM_TX_CTRL + oft, F_TXEN);
                 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
                 t3_write_reg(adap, A_TP_PIO_DATA, 0xc0ede401);
                 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_MODE);
                 t3_set_reg_field(adap, A_TP_PIO_DATA, 1 << idx, 1 << idx);
 
+                t3_write_reg(adap, A_XGM_TX_CTRL + oft, F_TXEN);
+
                 t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CNT_CH0 + idx);
                 mac->tx_mcnt = s->tx_frames;
                 mac->tx_tcnt = (G_TXDROPCNTCH0RCVD(t3_read_reg(adap,
@@ -454,6 +455,7 @@ int t3_mac_enable(struct cmac *mac, int which)
                 mac->rx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
                                                 A_XGM_RX_SPI4_SOP_EOP_CNT +
                                                 oft)));
+                mac->rx_ocnt = s->rx_fifo_ovfl;
                 mac->txen = F_TXEN;
                 mac->toggle_cnt = 0;
         }
@@ -464,24 +466,19 @@ int t3_mac_enable(struct cmac *mac, int which)
 
 int t3_mac_disable(struct cmac *mac, int which)
 {
-        int idx = macidx(mac);
         struct adapter *adap = mac->adapter;
-        int val;
 
         if (which & MAC_DIRECTION_TX) {
                 t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
-                t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
-                t3_write_reg(adap, A_TP_PIO_DATA, 0xc000001f);
-                t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_MODE);
-                t3_set_reg_field(adap, A_TP_PIO_DATA, 1 << idx, 1 << idx);
                 mac->txen = 0;
         }
         if (which & MAC_DIRECTION_RX) {
+                int val = F_MAC_RESET_;
+
                 t3_set_reg_field(mac->adapter, A_XGM_RESET_CTRL + mac->offset,
                                  F_PCS_RESET_, 0);
                 msleep(100);
                 t3_write_reg(adap, A_XGM_RX_CTRL + mac->offset, 0);
-                val = F_MAC_RESET_;
                 if (is_10G(adap))
                         val |= F_PCS_RESET_;
                 else if (uses_xaui(adap))
@@ -541,11 +538,14 @@ int t3b2_mac_watchdog_task(struct cmac *mac)
         }
 
 rxcheck:
-        if (rx_mcnt != mac->rx_mcnt)
+        if (rx_mcnt != mac->rx_mcnt) {
                 rx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
                                                 A_XGM_RX_SPI4_SOP_EOP_CNT +
-                                                mac->offset)));
-        else
+                                                mac->offset))) +
+                                                (s->rx_fifo_ovfl -
+                                                 mac->rx_ocnt);
+                mac->rx_ocnt = s->rx_fifo_ovfl;
+        } else
                 goto out;
 
         if (mac->rx_mcnt != s->rx_frames && rx_xcnt == 0 &&