tg3: Fix 5719 A0 tx completion bug

The 5719 A0 has a bug that manifests itself as if the chipset were
reordering memory writes.  The best known way to solve this problem is
to turn off LSO and jumbo frames.

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

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b944cc64a40913663dc77d1620f73ae46a0016e7..d6d081716af0ff2354818787c73e3d4d195ff252 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8108,8 +8108,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
        /* Program the jumbo buffer descriptor ring control
         * blocks on those devices that have them.
         */
-       if ((tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE) &&
-           !(tp->tg3_flags2 & TG3_FLG2_5780_CLASS)) {
+       if (tp->pci_chip_rev_id == CHIPREV_ID_5719_A0 ||
+           ((tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE) &&
+           !(tp->tg3_flags2 & TG3_FLG2_5780_CLASS))) {
                /* Setup replenish threshold. */
                tw32(RCVBDI_JUMBO_THRESH, tp->rx_jumbo_pending / 8);
 
@@ -13329,7 +13330,9 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
        }
 
        /* Determine TSO capabilities */
-       if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
+       if (tp->pci_chip_rev_id == CHIPREV_ID_5719_A0)
+               ; /* Do nothing. HW bug. */
+       else if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
                tp->tg3_flags2 |= TG3_FLG2_HW_TSO_3;
        else if ((tp->tg3_flags3 & TG3_FLG3_5755_PLUS) ||
                 GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
@@ -13380,7 +13383,8 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
                tp->tg3_flags3 |= TG3_FLG3_40BIT_DMA_LIMIT_BUG;
        }
 
-       if (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)
+       if ((tp->tg3_flags3 & TG3_FLG3_5717_PLUS) &&
+           tp->pci_chip_rev_id != CHIPREV_ID_5719_A0)
                tp->tg3_flags3 |= TG3_FLG3_USE_JUMBO_BDFLAG;
 
        if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS) ||

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 0a0987aeb32e2d6202c4ea8e6f2f08ff64cb2d2d..52ae6441af75c1df940c0d8ae66906945a4d5240 100644 (file)
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -141,6 +141,7 @@
 #define  CHIPREV_ID_57780_A1            0x57780001
 #define  CHIPREV_ID_5717_A0             0x05717000
 #define  CHIPREV_ID_57765_A0            0x57785000
+#define  CHIPREV_ID_5719_A0             0x05719000
 #define  GET_ASIC_REV(CHIP_REV_ID)     ((CHIP_REV_ID) >> 12)
 #define   ASIC_REV_5700                         0x07
 #define   ASIC_REV_5701                         0x00