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authorOlof Johansson <olof@lixom.net>2007-09-26 16:24:42 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:53:43 -0700
commit36033766533176d61ba15793d8ef219775499c2f (patch)
treeebaebab67a5ff51388b92ca24723b1e324730ebb /drivers
parentca7e235f5eb960d83b45cef4384b490672538cd9 (diff)
pasemi_mac: don't enable rx before there are buffers on the ring
pasemi_mac: don't enable rx before there are buffers on the ring Reorder initialization of the DMA channels and the interface. Before there was a time window when the interface was enabled before DMA was enabled. Also, now there will always be RX buffers available at the time the MAC interface is enabled, to avoid temporary out-of-buffer errors for the very first packets (on busy networks). Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/pasemi_mac.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 8892b658655..643fce860e5 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -786,14 +786,6 @@ static int pasemi_mac_open(struct net_device *dev)
write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
- flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
- PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
-
- if (mac->type == MAC_TYPE_GMAC)
- flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
- else
- flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
-
write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
@@ -808,8 +800,6 @@ static int pasemi_mac_open(struct net_device *dev)
write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
- write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
-
ret = pasemi_mac_setup_rx_resources(dev);
if (ret)
goto out_rx_resources;
@@ -837,6 +827,17 @@ static int pasemi_mac_open(struct net_device *dev)
pasemi_mac_replenish_rx_ring(dev);
+ flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
+ PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
+
+ if (mac->type == MAC_TYPE_GMAC)
+ flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
+ else
+ flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
+
+ /* Enable interface in MAC */
+ write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
+
ret = pasemi_mac_phy_init(dev);
/* Some configs don't have PHYs (XAUI etc), so don't complain about
* failed init due to -ENODEV.