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authorOlof Johansson <olof@lixom.net>2007-09-27 01:24:42 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-11 03:53:43 +0400
commit36033766533176d61ba15793d8ef219775499c2f (patch)
treeebaebab67a5ff51388b92ca24723b1e324730ebb /drivers/net/pasemi_mac.c
parentca7e235f5eb960d83b45cef4384b490672538cd9 (diff)
downloadlinux-36033766533176d61ba15793d8ef219775499c2f.tar.xz
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/net/pasemi_mac.c')
-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 8892b658655c..643fce860e5c 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.