From: Michael Chan <[email protected]> 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: <[email protected]> Signed-off-by: Michael Chan <[email protected]> Signed-off-by: Nithin Nayak Sujir <[email protected]> --- drivers/net/ethernet/broadcom/tg3.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 781be76..e285d76 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; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
