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authorJeff Garzik <jgarzik@pobox.com>2005-05-13 03:28:49 +0400
committerJeff Garzik <jgarzik@pobox.com>2005-05-13 03:28:49 +0400
commitfcec34565827f2edb29d124498aa8f561455f15d (patch)
tree52c1c3ff75859ce740da9a2704bb9f63ea71de5a /drivers/net/8139cp.c
parent88d7bd8cb9eb8d64bf7997600b0d64f7834047c5 (diff)
downloadlinux-fcec34565827f2edb29d124498aa8f561455f15d.tar.xz
[netdrvr 8139cp] TSO support
Diffstat (limited to 'drivers/net/8139cp.c')
-rw-r--r--drivers/net/8139cp.c50
1 files changed, 33 insertions, 17 deletions
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
index d639cb8dc461..a7573dd92f26 100644
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -186,6 +186,9 @@ enum {
RingEnd = (1 << 30), /* End of descriptor ring */
FirstFrag = (1 << 29), /* First segment of a packet */
LastFrag = (1 << 28), /* Final segment of a packet */
+ LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */
+ MSSShift = 16, /* MSS value position */
+ MSSMask = 0xfff, /* MSS value: 11 bits */
TxError = (1 << 23), /* Tx error summary */
RxError = (1 << 20), /* Rx error summary */
IPCS = (1 << 18), /* Calculate IP checksum */
@@ -749,10 +752,11 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
{
struct cp_private *cp = netdev_priv(dev);
unsigned entry;
- u32 eor;
+ u32 eor, flags;
#if CP_VLAN_TAG_USED
u32 vlan_tag = 0;
#endif
+ int mss = 0;
spin_lock_irq(&cp->lock);
@@ -772,6 +776,9 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
entry = cp->tx_head;
eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
+ if (dev->features & NETIF_F_TSO)
+ mss = skb_shinfo(skb)->tso_size;
+
if (skb_shinfo(skb)->nr_frags == 0) {
struct cp_desc *txd = &cp->tx_ring[entry];
u32 len;
@@ -783,21 +790,21 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
txd->addr = cpu_to_le64(mapping);
wmb();
- if (skb->ip_summed == CHECKSUM_HW) {
+ flags = eor | len | DescOwn | FirstFrag | LastFrag;
+
+ if (mss)
+ flags |= LargeSend | ((mss & MSSMask) << MSSShift);
+ else if (skb->ip_summed == CHECKSUM_HW) {
const struct iphdr *ip = skb->nh.iph;
if (ip->protocol == IPPROTO_TCP)
- txd->opts1 = cpu_to_le32(eor | len | DescOwn |
- FirstFrag | LastFrag |
- IPCS | TCPCS);
+ flags |= IPCS | TCPCS;
else if (ip->protocol == IPPROTO_UDP)
- txd->opts1 = cpu_to_le32(eor | len | DescOwn |
- FirstFrag | LastFrag |
- IPCS | UDPCS);
+ flags |= IPCS | UDPCS;
else
BUG();
- } else
- txd->opts1 = cpu_to_le32(eor | len | DescOwn |
- FirstFrag | LastFrag);
+ }
+
+ txd->opts1 = cpu_to_le32(flags);
wmb();
cp->tx_skb[entry].skb = skb;
@@ -836,16 +843,19 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
len, PCI_DMA_TODEVICE);
eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
- if (skb->ip_summed == CHECKSUM_HW) {
- ctrl = eor | len | DescOwn | IPCS;
+ ctrl = eor | len | DescOwn;
+
+ if (mss)
+ ctrl |= LargeSend |
+ ((mss & MSSMask) << MSSShift);
+ else if (skb->ip_summed == CHECKSUM_HW) {
if (ip->protocol == IPPROTO_TCP)
- ctrl |= TCPCS;
+ ctrl |= IPCS | TCPCS;
else if (ip->protocol == IPPROTO_UDP)
- ctrl |= UDPCS;
+ ctrl |= IPCS | UDPCS;
else
BUG();
- } else
- ctrl = eor | len | DescOwn;
+ }
if (frag == skb_shinfo(skb)->nr_frags - 1)
ctrl |= LastFrag;
@@ -1538,6 +1548,8 @@ static struct ethtool_ops cp_ethtool_ops = {
.set_tx_csum = ethtool_op_set_tx_csum, /* local! */
.get_sg = ethtool_op_get_sg,
.set_sg = ethtool_op_set_sg,
+ .get_tso = ethtool_op_get_tso,
+ .set_tso = ethtool_op_set_tso,
.get_regs = cp_get_regs,
.get_wol = cp_get_wol,
.set_wol = cp_set_wol,
@@ -1768,6 +1780,10 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
if (pci_using_dac)
dev->features |= NETIF_F_HIGHDMA;
+#if 0 /* disabled by default until verified */
+ dev->features |= NETIF_F_TSO;
+#endif
+
dev->irq = pdev->irq;
rc = register_netdev(dev);