OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] sky2: TSO mss optimization 

The MSS in the transmit engine only has to change if TSO mtu changes. This
means less commands to the chip when mixing TSO and regular data.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
shemminger@osdl.org 2006-08-28 10:00:49 -07:00 committed by Jeff Garzik
parent bb507fe11f
commit e07560cd4f
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/sky2.c
View File

@ -1244,15 +1244,15 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
mss += ((skb->h.th->doff - 5) * 4); /* TCP options */
mss += (skb->nh.iph->ihl * 4) + sizeof(struct tcphdr);
mss += ETH_HLEN;
}
if (mss != sky2->tx_last_mss) {
le = get_tx_le(sky2);
le->tx.tso.size = cpu_to_le16(mss);
le->tx.tso.rsvd = 0;
le->opcode = OP_LRGLEN | HW_OWNER;
le->ctrl = 0;
sky2->tx_last_mss = mss;
if (mss != sky2->tx_last_mss) {
le = get_tx_le(sky2);
le->tx.tso.size = cpu_to_le16(mss);
le->tx.tso.rsvd = 0;
le->opcode = OP_LRGLEN | HW_OWNER;
le->ctrl = 0;
sky2->tx_last_mss = mss;
}
}
ctrl = 0;
@ -1320,7 +1320,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
le->opcode = OP_BUFFER | HW_OWNER;
fre = sky2->tx_ring
+ RING_NEXT((re - sky2->tx_ring) + i, TX_RING_SIZE);
+ RING_NEXT((re - sky2->tx_ring) + i, TX_RING_SIZE);
pci_unmap_addr_set(fre, mapaddr, mapping);
}