From d309a46e42542223946d3a9e4e239fdc945cb53e Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Thu, 30 Sep 2010 10:34:31 +0000 Subject: tg3: 5719: Prevent tx data corruption This patch enables a bit that prevents read DMA overflows and adjusts the txmbuf margin from the hardware default. The combination of these modifications prevents a tx data corruption issue we were seeing on the 5719. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 12 +++++++++++- drivers/net/tg3.h | 8 +++++++- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 982ed44f075..b6388be1cd1 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -7857,7 +7857,10 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) tw32(BUFMGR_DMA_HIGH_WATER, tp->bufmgr_config.dma_high_water); - tw32(BUFMGR_MODE, BUFMGR_MODE_ENABLE | BUFMGR_MODE_ATTN_ENABLE); + val = BUFMGR_MODE_ENABLE | BUFMGR_MODE_ATTN_ENABLE; + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719) + val |= BUFMGR_MODE_NO_TX_UNDERRUN; + tw32(BUFMGR_MODE, val); for (i = 0; i < 2000; i++) { if (tr32(BUFMGR_MODE) & BUFMGR_MODE_ENABLE) break; @@ -8037,6 +8040,13 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) val | TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX); } + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719) { + val = tr32(TG3_LSO_RD_DMA_CRPTEN_CTRL); + tw32(TG3_LSO_RD_DMA_CRPTEN_CTRL, val | + TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_BD_4K | + TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_LSO_4K); + } + /* Receive/send statistics. */ if (tp->tg3_flags2 & TG3_FLG2_5750_PLUS) { val = tr32(RCVLPC_STATS_ENABLE); diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 44733e4a68a..ec62f057ff6 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -1225,6 +1225,7 @@ #define BUFMGR_MODE_ATTN_ENABLE 0x00000004 #define BUFMGR_MODE_BM_TEST 0x00000008 #define BUFMGR_MODE_MBLOW_ATTN_ENAB 0x00000010 +#define BUFMGR_MODE_NO_TX_UNDERRUN 0x80000000 #define BUFMGR_STATUS 0x00004404 #define BUFMGR_STATUS_ERROR 0x00000004 #define BUFMGR_STATUS_MBLOW 0x00000010 @@ -1306,7 +1307,12 @@ #define TG3_RDMA_RSRVCTRL_REG 0x00004900 #define TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX 0x00000004 -/* 0x4904 --> 0x4c00 unused */ +/* 0x4904 --> 0x4910 unused */ + +#define TG3_LSO_RD_DMA_CRPTEN_CTRL 0x00004910 +#define TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_BD_4K 0x00030000 +#define TG3_LSO_RD_DMA_CRPTEN_CTRL_BLEN_LSO_4K 0x000c0000 +/* 0x4914 --> 0x4c00 unused */ /* Write DMA control registers */ #define WDMAC_MODE 0x00004c00 -- cgit v1.2.3-70-g09d2