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authorJay Cliburn <jacliburn@bellsouth.net>2008-02-02 19:50:05 -0600
committerJeff Garzik <jeff@garzik.org>2008-03-17 07:49:23 -0400
commit9d90fb1ac9d97da86e24d9ea947bf2a2f333829a (patch)
tree6d131717366e60ec0b8d1c8adbc133d99ff5f736 /drivers/net/atlx
parent305282ba19f81e571bd6d2dcc10ebb02e59a06ef (diff)
atl1: fix broken TSO
The L1 tx packet descriptor expects TCP Header Length to be expressed as a number of 32-bit dwords. The atl1 driver uses tcp_hdrlen() to populate the field, but tcp_hdrlen() returns the header length in bytes, not in dwords. Add a shift to convert tcp_hdrlen() to dwords when we write it to the tpd. Also, some of our bit assignments are made to the wrong tpd words. Change those to the correct words. Finally, since all this fixes TSO, enable TSO by default. Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net> Acked-by: Chris Snook <csnook@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/atlx')
-rw-r--r--drivers/net/atlx/atl1.c29
1 files changed, 11 insertions, 18 deletions
diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index a84c97c75c7..8a26dad96ac 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -36,7 +36,6 @@
* A very incomplete list of things that need to be dealt with:
*
* TODO:
- * Fix TSO; tx performance is horrible with TSO enabled.
* Wake on LAN.
* Add more ethtool functions.
* Fix abstruse irq enable/disable condition described here:
@@ -1308,8 +1307,8 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;
tso->tsopl |= (iph->ihl &
- CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
- tso->tsopl |= (tcp_hdrlen(skb) &
+ TSO_PARAM_IPHL_MASK) << TSO_PARAM_IPHL_SHIFT;
+ tso->tsopl |= ((tcp_hdrlen(skb) >> 2) &
TSO_PARAM_TCPHDRLEN_MASK) <<
TSO_PARAM_TCPHDRLEN_SHIFT;
tso->tsopl |= (skb_shinfo(skb)->gso_size &
@@ -1472,8 +1471,8 @@ static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
tpd->desc.tso.tsopl = descr->tso.tsopl;
tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
tpd->desc.data = descr->data;
- tpd->desc.csum.csumpu |= (cpu_to_le16(buffer_info->length) &
- CSUM_PARAM_BUFLEN_MASK) << CSUM_PARAM_BUFLEN_SHIFT;
+ tpd->desc.tso.tsopu |= (cpu_to_le16(buffer_info->length) &
+ TSO_PARAM_BUFLEN_MASK) << TSO_PARAM_BUFLEN_SHIFT;
val = (descr->tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
TSO_PARAM_SEGMENT_MASK;
@@ -1481,7 +1480,7 @@ static void atl1_tx_queue(struct atl1_adapter *adapter, int count,
tpd->desc.tso.tsopl |= 1 << TSO_PARAM_HDRFLAG_SHIFT;
if (j == (count - 1))
- tpd->desc.csum.csumpl |= 1 << CSUM_PARAM_EOP_SHIFT;
+ tpd->desc.tso.tsopl |= 1 << TSO_PARAM_EOP_SHIFT;
if (++tpd_next_to_use == tpd_ring->count)
tpd_next_to_use = 0;
@@ -1574,9 +1573,9 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
vlan_tag = vlan_tx_tag_get(skb);
vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
((vlan_tag >> 9) & 0x8);
- param.csum.csumpl |= 1 << CSUM_PARAM_INSVLAG_SHIFT;
- param.csum.csumpu |= (vlan_tag & CSUM_PARAM_VALANTAG_MASK) <<
- CSUM_PARAM_VALAN_SHIFT;
+ param.tso.tsopl |= 1 << TSO_PARAM_INSVLAG_SHIFT;
+ param.tso.tsopu |= (vlan_tag & TSO_PARAM_VLANTAG_MASK) <<
+ TSO_PARAM_VLAN_SHIFT;
}
tso = atl1_tso(adapter, skb, &param.tso);
@@ -1595,8 +1594,8 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
}
}
- val = (param.csum.csumpl >> CSUM_PARAM_SEGMENT_SHIFT) &
- CSUM_PARAM_SEGMENT_MASK;
+ val = (param.tso.tsopl >> TSO_PARAM_SEGMENT_SHIFT) &
+ TSO_PARAM_SEGMENT_MASK;
atl1_tx_map(adapter, skb, 1 == val);
atl1_tx_queue(adapter, count, &param);
netdev->trans_start = jiffies;
@@ -2091,13 +2090,7 @@ static int __devinit atl1_probe(struct pci_dev *pdev,
netdev->features = NETIF_F_HW_CSUM;
netdev->features |= NETIF_F_SG;
netdev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
-
- /*
- * FIXME - Until tso performance gets fixed, disable the feature.
- * Enable it with ethtool -K if desired.
- */
- /* netdev->features |= NETIF_F_TSO; */
-
+ netdev->features |= NETIF_F_TSO;
netdev->features |= NETIF_F_LLTX;
/*