From 0339e4e3effeae71e2b19c6340ef9672fb7a2cb3 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Fri, 12 Feb 2010 14:47:09 +0000 Subject: [PATCH] tg3: Turn off multiple DMA reads for 5717 The 5717's DMA read engine has a bug when initiating multiple DMA reads across the PCIe bus. This patch disables the feature. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Reviewed-by: Benjamin Li Signed-off-by: David S. Miller --- drivers/net/tg3.c | 3 +++ drivers/net/tg3.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 2c5e1b7e1088..673ea314aa18 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -7915,6 +7915,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) RDMAC_MODE_FIFOURUN_ENAB | RDMAC_MODE_FIFOOREAD_ENAB | RDMAC_MODE_LNGREAD_ENAB); + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717) + rdmac_mode |= RDMAC_MODE_MULT_DMA_RD_DIS; + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 || GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 || GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780) diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index 46db4ad46bbc..a8fb53aaf742 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -1258,6 +1258,7 @@ #define RDMAC_MODE_MBUF_SBD_CRPT_ENAB 0x00002000 #define RDMAC_MODE_FIFO_SIZE_128 0x00020000 #define RDMAC_MODE_FIFO_LONG_BURST 0x00030000 +#define RDMAC_MODE_MULT_DMA_RD_DIS 0x01000000 #define RDMAC_MODE_IPV4_LSO_EN 0x08000000 #define RDMAC_MODE_IPV6_LSO_EN 0x10000000 #define RDMAC_STATUS 0x00004804 -- 2.30.2