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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 <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Reviewed-by: Benjamin Li <benli@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -7915,6 +7915,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
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RDMAC_MODE_FIFOURUN_ENAB | RDMAC_MODE_FIFOOREAD_ENAB |
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RDMAC_MODE_LNGREAD_ENAB);
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if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717)
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rdmac_mode |= RDMAC_MODE_MULT_DMA_RD_DIS;
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if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
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GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785 ||
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GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780)
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@ -1258,6 +1258,7 @@
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#define RDMAC_MODE_MBUF_SBD_CRPT_ENAB 0x00002000
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#define RDMAC_MODE_FIFO_SIZE_128 0x00020000
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#define RDMAC_MODE_FIFO_LONG_BURST 0x00030000
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#define RDMAC_MODE_MULT_DMA_RD_DIS 0x01000000
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#define RDMAC_MODE_IPV4_LSO_EN 0x08000000
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#define RDMAC_MODE_IPV6_LSO_EN 0x10000000
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#define RDMAC_STATUS 0x00004804
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