diff options
| -rw-r--r-- | drivers/net/tg3.c | 52 | ||||
| -rw-r--r-- | drivers/net/tg3.h | 1 |
2 files changed, 47 insertions, 6 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index b93ba3d2192a..c77a39d6cd15 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -190,6 +190,7 @@ static inline void _tg3_flag_clear(enum TG3_FLAGS flag, unsigned long *bits) /* minimum number of free TX descriptors required to wake up TX process */ #define TG3_TX_WAKEUP_THRESH(tnapi) ((tnapi)->tx_pending / 4) +#define TG3_TX_BD_DMA_MAX 4096 #define TG3_RAW_IP_ALIGN 2 @@ -5940,14 +5941,50 @@ static bool tg3_tx_frag_set(struct tg3_napi *tnapi, u32 *entry, u32 *budget, if (tg3_40bit_overflow_test(tp, map, len)) hwbug = 1; - if (*budget) { + if (tg3_flag(tp, 4K_FIFO_LIMIT)) { + u32 tmp_flag = flags & ~TXD_FLAG_END; + while (len > TG3_TX_BD_DMA_MAX) { + u32 frag_len = TG3_TX_BD_DMA_MAX; + len -= TG3_TX_BD_DMA_MAX; + + if (len) { + tnapi->tx_buffers[*entry].fragmented = true; + /* Avoid the 8byte DMA problem */ + if (len <= 8) { + len += TG3_TX_BD_DMA_MAX / 2; + frag_len = TG3_TX_BD_DMA_MAX / 2; + } + } else + tmp_flag = flags; + + if (*budget) { + tg3_tx_set_bd(&tnapi->tx_ring[*entry], map, + frag_len, tmp_flag, mss, vlan); + (*budget)--; + *entry = NEXT_TX(*entry); + } else { + hwbug = 1; + break; + } + + map += frag_len; + } + + if (len) { + if (*budget) { + tg3_tx_set_bd(&tnapi->tx_ring[*entry], map, + len, flags, mss, vlan); + (*budget)--; + *entry = NEXT_TX(*entry); + } else { + hwbug = 1; + } + } + } else { tg3_tx_set_bd(&tnapi->tx_ring[*entry], map, len, flags, mss, vlan); - (*budget)--; - } else - hwbug = 1; - - *entry = NEXT_TX(*entry); + *entry = NEXT_TX(*entry); + } return hwbug; } @@ -13899,6 +13936,9 @@ static int __devinit tg3_get_invariants(struct tg3 *tp) if (tg3_flag(tp, 5755_PLUS)) tg3_flag_set(tp, SHORT_DMA_BUG); + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719) + tg3_flag_set(tp, 4K_FIFO_LIMIT); + if (tg3_flag(tp, 5717_PLUS)) tg3_flag_set(tp, LRG_PROD_RING_CAP); diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 466dd7add12b..2ea456dd5880 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -2905,6 +2905,7 @@ enum TG3_FLAGS { TG3_FLAG_57765_PLUS, TG3_FLAG_APE_HAS_NCSI, TG3_FLAG_5717_PLUS, + TG3_FLAG_4K_FIFO_LIMIT, /* Add new flags before this comment and TG3_FLAG_NUMBER_OF_FLAGS */ TG3_FLAG_NUMBER_OF_FLAGS, /* Last entry in enum TG3_FLAGS */ |