diff options
| author | Michael Chan <mchan@broadcom.com> | 2013-05-13 11:04:16 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-14 11:32:04 -0700 |
| commit | 0f0d15100a8ac875bdd408324c473e16d73d3557 (patch) | |
| tree | febfe0543aa31aa965ec5358a6e71f6672d25380 /drivers/net/ethernet/broadcom | |
| parent | 44f3b503c16425c8e9db4bbaa2fc9cd0c9d0ba91 (diff) | |
tg3: Fix data corruption on 5725 with TSO
The 5725 family of devices (asic rev 5762), corrupts TSO packets where
the buffer is within MSS bytes of a 4G boundary (4G, 8G etc.). Detect
this condition and trigger the workaround path.
Cc: <stable@vger.kernel.org>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 781be766012..e285d764565 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -7448,6 +7448,20 @@ static inline int tg3_4g_overflow_test(dma_addr_t mapping, int len) return (base > 0xffffdcc0) && (base + len + 8 < base); } +/* Test for TSO DMA buffers that cross into regions which are within MSS bytes + * of any 4GB boundaries: 4G, 8G, etc + */ +static inline int tg3_4g_tso_overflow_test(struct tg3 *tp, dma_addr_t mapping, + u32 len, u32 mss) +{ + if (tg3_asic_rev(tp) == ASIC_REV_5762 && mss) { + u32 base = (u32) mapping & 0xffffffff; + + return ((base + len + (mss & 0x3fff)) < base); + } + return 0; +} + /* Test for DMA addresses > 40-bit */ static inline int tg3_40bit_overflow_test(struct tg3 *tp, dma_addr_t mapping, int len) @@ -7484,6 +7498,9 @@ static bool tg3_tx_frag_set(struct tg3_napi *tnapi, u32 *entry, u32 *budget, if (tg3_4g_overflow_test(map, len)) hwbug = true; + if (tg3_4g_tso_overflow_test(tp, map, len, mss)) + hwbug = true; + if (tg3_40bit_overflow_test(tp, map, len)) hwbug = true; |