diff options
| author | Olof Johansson <olof@lixom.net> | 2007-10-03 01:26:30 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-11 03:54:24 +0400 |
| commit | 9a50bebda95745d312c69d3bb6d788067cbefb84 (patch) | |
| tree | 5aaa75097fb0b62b22c0d833282fcb28a49a9d5c /drivers/net | |
| parent | ad3c20d1ab586884f1815c315e3f303a8b8a7d7d (diff) | |
| download | linux-9a50bebda95745d312c69d3bb6d788067cbefb84.tar.xz | |
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 <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 9 | ||||
| -rw-r--r-- | drivers/net/pasemi_mac.h | 8 |
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index 5eb5e47120d0..c538c66d4b4f 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); diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h index 5a896aa87a99..db3393674ae7 100644 --- a/drivers/net/pasemi_mac.h +++ b/drivers/net/pasemi_mac.h @@ -210,6 +210,8 @@ enum { #define PAS_DMA_RXINT_CFG_DHL_S 24 #define PAS_DMA_RXINT_CFG_DHL(x) (((x) << PAS_DMA_RXINT_CFG_DHL_S) & \ PAS_DMA_RXINT_CFG_DHL_M) +#define PAS_DMA_RXINT_CFG_LW 0x00200000 +#define PAS_DMA_RXINT_CFG_L2 0x00100000 #define PAS_DMA_RXINT_CFG_WIF 0x00000002 #define PAS_DMA_RXINT_CFG_WIL 0x00000001 @@ -315,6 +317,12 @@ enum { #define PAS_STATUS_SOFT 0x4000000000000000ull #define PAS_STATUS_INT 0x8000000000000000ull +#define PAS_IOB_COM_PKTHDRCNT 0x120 +#define PAS_IOB_COM_PKTHDRCNT_PKTHDR1_M 0x0fff0000 +#define PAS_IOB_COM_PKTHDRCNT_PKTHDR1_S 16 +#define PAS_IOB_COM_PKTHDRCNT_PKTHDR0_M 0x00000fff +#define PAS_IOB_COM_PKTHDRCNT_PKTHDR0_S 0 + #define PAS_IOB_DMA_RXCH_CFG(i) (0x1100 + (i)*4) #define PAS_IOB_DMA_RXCH_CFG_CNTTH_M 0x00000fff #define PAS_IOB_DMA_RXCH_CFG_CNTTH_S 0 |