From 9a50bebda95745d312c69d3bb6d788067cbefb84 Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Tue, 2 Oct 2007 16:26:30 -0500 Subject: pasemi_mac: workaround for erratum 5971 pasemi_mac: workaround for erratum 5971 Implement workarounds for erratum 5971, where L2 hints aren't considered properly unless the way hint is enabled on the interface. Since L2 isn't setup to dedicate a way to headers, we need to reset the packet count by hand so it won't run out of credits. Signed-off-by: Olof Johansson Signed-off-by: Jeff Garzik --- drivers/net/pasemi_mac.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/net/pasemi_mac.c') diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index 5eb5e47120d..c538c66d4b4 100644 --- a/drivers/net/pasemi_mac.c +++ b/drivers/net/pasemi_mac.c @@ -239,7 +239,9 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev) PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if), - PAS_DMA_RXINT_CFG_DHL(2)); + PAS_DMA_RXINT_CFG_DHL(3) | + PAS_DMA_RXINT_CFG_L2 | + PAS_DMA_RXINT_CFG_LW); ring->next_to_fill = 0; ring->next_to_clean = 0; @@ -589,6 +591,11 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit) n += 2; } + if (n > RX_RING_SIZE) { + /* Errata 5971 workaround: L2 target of headers */ + write_iob_reg(mac, PAS_IOB_COM_PKTHDRCNT, 0); + n &= (RX_RING_SIZE-1); + } mac->rx->next_to_clean = n; pasemi_mac_replenish_rx_ring(mac->netdev, limit-count); -- cgit v1.2.3