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path: root/drivers/s390/net/qeth_l2_main.c
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Diffstat (limited to 'drivers/s390/net/qeth_l2_main.c')
-rw-r--r--drivers/s390/net/qeth_l2_main.c50
1 files changed, 39 insertions, 11 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index a8b069cd9a4c..b3cee032f578 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -243,8 +243,7 @@ static void qeth_l2_get_packet_type(struct qeth_card *card,
static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
struct sk_buff *skb, int ipv, int cast_type)
{
- struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
- QETH_HEADER_SIZE);
+ struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
memset(hdr, 0, sizeof(struct qeth_hdr));
hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
@@ -621,6 +620,9 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
int tx_bytes = skb->len;
enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
struct qeth_eddp_context *ctx = NULL;
+ int data_offset = -1;
+ int elements_needed = 0;
+ int hd_len = 0;
if ((card->state != CARD_STATE_UP) || !card->lan_online) {
card->stats.tx_carrier_errors++;
@@ -643,13 +645,32 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (card->info.type == QETH_CARD_TYPE_OSN)
hdr = (struct qeth_hdr *)skb->data;
else {
- /* create a clone with writeable headroom */
- new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr));
- if (!new_skb)
- goto tx_drop;
- hdr = (struct qeth_hdr *)skb_push(new_skb,
+ if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
+ (skb_shinfo(skb)->nr_frags == 0)) {
+ new_skb = skb;
+ data_offset = ETH_HLEN;
+ hd_len = ETH_HLEN;
+ hdr = kmem_cache_alloc(qeth_core_header_cache,
+ GFP_ATOMIC);
+ if (!hdr)
+ goto tx_drop;
+ elements_needed++;
+ skb_reset_mac_header(new_skb);
+ qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
+ hdr->hdr.l2.pkt_length = new_skb->len;
+ memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
+ skb_mac_header(new_skb), ETH_HLEN);
+ } else {
+ /* create a clone with writeable headroom */
+ new_skb = skb_realloc_headroom(skb,
+ sizeof(struct qeth_hdr));
+ if (!new_skb)
+ goto tx_drop;
+ hdr = (struct qeth_hdr *)skb_push(new_skb,
sizeof(struct qeth_hdr));
- qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
+ skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
+ qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
+ }
}
if (large_send == QETH_LARGE_SEND_EDDP) {
@@ -660,9 +681,13 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto tx_drop;
}
} else {
- elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
- if (!elements)
+ elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
+ elements_needed);
+ if (!elements) {
+ if (data_offset >= 0)
+ kmem_cache_free(qeth_core_header_cache, hdr);
goto tx_drop;
+ }
}
if ((large_send == QETH_LARGE_SEND_NO) &&
@@ -674,7 +699,7 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
elements, ctx);
else
rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
- elements, ctx);
+ elements, ctx, data_offset, hd_len);
if (!rc) {
card->stats.tx_packets++;
card->stats.tx_bytes += tx_bytes;
@@ -701,6 +726,9 @@ static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (ctx != NULL)
qeth_eddp_put_context(ctx);
+ if (data_offset >= 0)
+ kmem_cache_free(qeth_core_header_cache, hdr);
+
if (rc == -EBUSY) {
if (new_skb != skb)
dev_kfree_skb_any(new_skb);