2015-10-19 10:09:54 +00:00
|
|
|
commit 8b7a7048220f86547db31de0abe1ea6dd2cfa892
|
|
|
|
|
Author: David Woodhouse <dwmw2@infradead.org>
|
|
|
|
|
Date: Thu Sep 24 11:38:22 2015 +0100
|
|
|
|
|
|
|
|
|
|
8139cp: Fix GSO MSS handling
|
|
|
|
|
|
|
|
|
|
When fixing the TSO support I noticed we just mask ->gso_size with the
|
|
|
|
|
MSSMask value and don't care about the consequences.
|
|
|
|
|
|
|
|
|
|
Provide a .ndo_features_check() method which drops the NETIF_F_TSO
|
|
|
|
|
feature for any skb which would exceed the maximum, and thus forces it
|
|
|
|
|
to be segmented by software.
|
|
|
|
|
|
|
|
|
|
Then we can stop the masking in cp_start_xmit(), and just WARN if the
|
|
|
|
|
maximum is exceeded, which should now never happen.
|
|
|
|
|
|
|
|
|
|
Finally, Francois Romieu noticed that we didn't even have the right
|
|
|
|
|
value for MSSMask anyway; it should be 0x7ff (11 bits) not 0xfff.
|
|
|
|
|
|
|
|
|
|
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
|
|
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
|
|
|
|
|
|
|
|
commit 5a58f227790faded5a3ef6075f3ddd65093e0f86
|
|
|
|
|
Author: David Woodhouse <David.Woodhouse@intel.com>
|
|
|
|
|
Date: Wed Sep 23 09:46:09 2015 +0100
|
|
|
|
|
|
|
|
|
|
8139cp: Enable offload features by default
|
|
|
|
|
|
|
|
|
|
I fixed TSO. Hardware checksum and scatter/gather also appear to be
|
|
|
|
|
working correctly both on real hardware and in QEMU's emulation.
|
|
|
|
|
|
|
|
|
|
Let's enable them by default and see if anyone screams...
|
|
|
|
|
|
|
|
|
|
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
|
|
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
|
|
|
--- a/drivers/net/ethernet/realtek/8139cp.c
|
|
|
|
|
+++ b/drivers/net/ethernet/realtek/8139cp.c
|
|
|
|
|
@@ -175,7 +175,7 @@ enum {
|
|
|
|
|
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 */
|
|
|
|
|
+ MSSMask = 0x7ff, /* MSS value: 11 bits */
|
|
|
|
|
TxError = (1 << 23), /* Tx error summary */
|
|
|
|
|
RxError = (1 << 20), /* Rx error summary */
|
|
|
|
|
IPCS = (1 << 18), /* Calculate IP checksum */
|
2015-10-25 16:13:34 +00:00
|
|
|
@@ -754,10 +754,16 @@ static netdev_tx_t cp_start_xmit (struct
|
2015-10-19 10:09:54 +00:00
|
|
|
eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
|
|
|
|
|
mss = skb_shinfo(skb)->gso_size;
|
|
|
|
|
|
|
|
|
|
+ if (mss > MSSMask) {
|
|
|
|
|
+ WARN_ONCE(1, "Net bug: GSO size %d too large for 8139CP\n",
|
|
|
|
|
+ mss);
|
|
|
|
|
+ goto out_dma_error;
|
|
|
|
|
+ }
|
|
|
|
|
+
|
|
|
|
|
opts2 = cpu_to_le32(cp_tx_vlan_tag(skb));
|
|
|
|
|
opts1 = DescOwn;
|
|
|
|
|
if (mss)
|
|
|
|
|
- opts1 |= LargeSend | ((mss & MSSMask) << MSSShift);
|
|
|
|
|
+ opts1 |= LargeSend | (mss << MSSShift);
|
|
|
|
|
else if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
|
|
|
const struct iphdr *ip = ip_hdr(skb);
|
|
|
|
|
if (ip->protocol == IPPROTO_TCP)
|
2015-10-25 16:13:34 +00:00
|
|
|
@@ -1852,6 +1858,15 @@ static void cp_set_d3_state (struct cp_p
|
2015-10-19 10:09:54 +00:00
|
|
|
pci_set_power_state (cp->pdev, PCI_D3hot);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
+static netdev_features_t cp_features_check(struct sk_buff *skb,
|
|
|
|
|
+ struct net_device *dev,
|
|
|
|
|
+ netdev_features_t features)
|
|
|
|
|
+{
|
|
|
|
|
+ if (skb_shinfo(skb)->gso_size > MSSMask)
|
|
|
|
|
+ features &= ~NETIF_F_TSO;
|
|
|
|
|
+
|
|
|
|
|
+ return vlan_features_check(skb, features);
|
|
|
|
|
+}
|
|
|
|
|
static const struct net_device_ops cp_netdev_ops = {
|
|
|
|
|
.ndo_open = cp_open,
|
|
|
|
|
.ndo_stop = cp_close,
|
2015-10-25 16:13:34 +00:00
|
|
|
@@ -1864,6 +1879,7 @@ static const struct net_device_ops cp_ne
|
2015-10-19 10:09:54 +00:00
|
|
|
.ndo_tx_timeout = cp_tx_timeout,
|
|
|
|
|
.ndo_set_features = cp_set_features,
|
|
|
|
|
.ndo_change_mtu = cp_change_mtu,
|
|
|
|
|
+ .ndo_features_check = cp_features_check,
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
|
|
|
.ndo_poll_controller = cp_poll_controller,
|
2015-10-25 16:13:34 +00:00
|
|
|
@@ -1983,12 +1999,12 @@ static int cp_init_one (struct pci_dev *
|
2015-10-19 10:09:54 +00:00
|
|
|
dev->ethtool_ops = &cp_ethtool_ops;
|
|
|
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
|
|
|
|
|
|
- dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
|
|
|
|
|
+ dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
|
|
|
|
|
+ NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
|
|
|
|
|
|
|
|
|
|
if (pci_using_dac)
|
|
|
|
|
dev->features |= NETIF_F_HIGHDMA;
|
|
|
|
|
|
|
|
|
|
- /* disabled by default until verified */
|
|
|
|
|
dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
|
|
|
|
|
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
|
|
|
|
|
dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
|
