diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index bb4aa4f586767053c9310030f546d81839c7e8dd..ae81f7022d23b5a3db79733e332d6784e9ece389 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -365,6 +365,7 @@ struct rcv_desc {
#define NETXEN_NIC_RXPKT_DESC 0x04
#define NETXEN_OLD_RXPKT_DESC 0x3f
#define NETXEN_NIC_RESPONSE_DESC 0x05
+#define NETXEN_NIC_LRO_DESC 0x12
/* for status field in status_desc */
#define STATUS_NEED_CKSUM (1)
@@ -398,6 +399,24 @@ struct rcv_desc {
#define netxen_get_sts_opcode(sts_data) \
(((sts_data) >> 58) & 0x03F)
+#define netxen_get_lro_sts_refhandle(sts_data) \
+ ((sts_data) & 0x0FFFF)
+#define netxen_get_lro_sts_length(sts_data) \
+ (((sts_data) >> 16) & 0x0FFFF)
+#define netxen_get_lro_sts_l2_hdr_offset(sts_data) \
+ (((sts_data) >> 32) & 0x0FF)
+#define netxen_get_lro_sts_l4_hdr_offset(sts_data) \
+ (((sts_data) >> 40) & 0x0FF)
+#define netxen_get_lro_sts_timestamp(sts_data) \
+ (((sts_data) >> 48) & 0x1)
+#define netxen_get_lro_sts_type(sts_data) \
+ (((sts_data) >> 49) & 0x7)
+#define netxen_get_lro_sts_push_flag(sts_data) \
+ (((sts_data) >> 52) & 0x1)
+#define netxen_get_lro_sts_seq_number(sts_data) \
+ ((sts_data) & 0x0FFFFFFFF)
+
+
struct status_desc {
__le64 status_desc_data[2];
} __attribute__ ((aligned(16)));
@@ -712,6 +731,7 @@ struct netxen_recv_context {
#define NX_CAP0_LSO NX_CAP_BIT(0, 6)
#define NX_CAP0_JUMBO_CONTIGUOUS NX_CAP_BIT(0, 7)
#define NX_CAP0_LRO_CONTIGUOUS NX_CAP_BIT(0, 8)
+#define NX_CAP0_HW_LRO NX_CAP_BIT(0, 10)
/*
* Context state
@@ -969,6 +989,7 @@ typedef struct {
#define NX_FW_CAPABILITY_PEXQ (1 << 7)
#define NX_FW_CAPABILITY_BDG (1 << 8)
#define NX_FW_CAPABILITY_FVLANTX (1 << 9)
+#define NX_FW_CAPABILITY_HW_LRO (1 << 10)
/* module types */
#define LINKEVENT_MODULE_NOT_PRESENT 1
diff --git a/drivers/net/netxen/netxen_nic_ctx.c b/drivers/net/netxen/netxen_nic_ctx.c
index 9e0469643d340e74ab9b02f71a92e9fc5b75971c..412d65829d2058c5b0ab9d2002cf2d8eeb2fce37 100644
--- a/drivers/net/netxen/netxen_nic_ctx.c
+++ b/drivers/net/netxen/netxen_nic_ctx.c
@@ -203,6 +203,8 @@ nx_fw_cmd_create_rx_ctx(struct netxen_adapter *adapter)
cap = (NX_CAP0_LEGACY_CONTEXT | NX_CAP0_LEGACY_MN);
cap |= (NX_CAP0_JUMBO_CONTIGUOUS | NX_CAP0_LRO_CONTIGUOUS);
+ if (adapter->capabilities & NX_FW_CAPABILITY_HW_LRO)
+ cap |= NX_CAP0_HW_LRO;
prq->capabilities[0] = cpu_to_le32(cap);
prq->host_int_crb_mode =
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index 81253abbfa34f58d0287960b684946ebb5c7614d..582828756ef42e1e921bdb6c7481692a8a7d6428 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -1242,20 +1242,31 @@ no_skb:
static struct netxen_rx_buffer *
netxen_process_rcv(struct netxen_adapter *adapter,
- int ring, int index, int length, int cksum, int pkt_offset,
- struct nx_host_sds_ring *sds_ring)
+ struct nx_host_sds_ring *sds_ring,
+ int ring, u64 sts_data0)
{
struct net_device *netdev = adapter->netdev;
struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
struct netxen_rx_buffer *buffer;
struct sk_buff *skb;
- struct nx_host_rds_ring *rds_ring = &recv_ctx->rds_rings[ring];
+ struct nx_host_rds_ring *rds_ring;
+ int index, length, cksum, pkt_offset;
- if (unlikely(index > rds_ring->num_desc))
+ if (unlikely(ring >= adapter->max_rds_rings))
+ return NULL;
+
+ rds_ring = &recv_ctx->rds_rings[ring];
+
+ index = netxen_get_sts_refhandle(sts_data0);
+ if (unlikely(index >= rds_ring->num_desc))
return NULL;
buffer = &rds_ring->rx_buf_arr[index];
+ length = netxen_get_sts_totallength(sts_data0);
+ cksum = netxen_get_sts_status(sts_data0);
+ pkt_offset = netxen_get_sts_pkt_offset(sts_data0);
+
skb = netxen_process_rxbuf(adapter, rds_ring, index, cksum);
if (!skb)
return buffer;
@@ -1279,6 +1290,78 @@ netxen_process_rcv(struct netxen_adapter *adapter,
return buffer;
}
+#define TCP_HDR_SIZE 20
+#define TCP_TS_OPTION_SIZE 12
+#define TCP_TS_HDR_SIZE (TCP_HDR_SIZE + TCP_TS_OPTION_SIZE)
+
+static struct netxen_rx_buffer *
+netxen_process_lro(struct netxen_adapter *adapter,
+ struct nx_host_sds_ring *sds_ring,
+ int ring, u64 sts_data0, u64 sts_data1)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
+ struct netxen_rx_buffer *buffer;
+ struct sk_buff *skb;
+ struct nx_host_rds_ring *rds_ring;
+ struct iphdr *iph;
+ struct tcphdr *th;
+ bool push, timestamp;
+ int l2_hdr_offset, l4_hdr_offset;
+ int index;
+ u16 lro_length, length, data_offset;
+ u32 seq_number;
+
+ if (unlikely(ring > adapter->max_rds_rings))
+ return NULL;
+
+ rds_ring = &recv_ctx->rds_rings[ring];
+
+ index = netxen_get_lro_sts_refhandle(sts_data0);
+ if (unlikely(index > rds_ring->num_desc))
+ return NULL;
+
+ buffer = &rds_ring->rx_buf_arr[index];
+
+ timestamp = netxen_get_lro_sts_timestamp(sts_data0);
+ lro_length = netxen_get_lro_sts_length(sts_data0);
+ l2_hdr_offset = netxen_get_lro_sts_l2_hdr_offset(sts_data0);
+ l4_hdr_offset = netxen_get_lro_sts_l4_hdr_offset(sts_data0);
+ push = netxen_get_lro_sts_push_flag(sts_data0);
+ seq_number = netxen_get_lro_sts_seq_number(sts_data1);
+
+ skb = netxen_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
+ if (!skb)
+ return buffer;
+
+ if (timestamp)
+ data_offset = l4_hdr_offset + TCP_TS_HDR_SIZE;
+ else
+ data_offset = l4_hdr_offset + TCP_HDR_SIZE;
+
+ skb_put(skb, lro_length + data_offset);
+
+ skb->truesize = (skb->len + sizeof(struct sk_buff) +
+ ((unsigned long)skb->data - (unsigned long)skb->head));
+
+ skb_pull(skb, l2_hdr_offset);
+ skb->protocol = eth_type_trans(skb, netdev);
+
+ iph = (struct iphdr *)skb->data;
+ th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
+
+ length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
+ iph->tot_len = htons(length);
+ iph->check = 0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+ th->psh = push;
+ th->seq = htonl(seq_number);
+
+ netif_receive_skb(skb);
+
+ return buffer;
+}
+
#define netxen_merge_rx_buffers(list, head) \
do { list_splice_tail_init(list, head); } while (0);
@@ -1295,28 +1378,33 @@ netxen_process_rcv_ring(struct nx_host_sds_ring *sds_ring, int max)
u32 consumer = sds_ring->consumer;
int count = 0;
- u64 sts_data;
- int opcode, ring, index, length, cksum, pkt_offset, desc_cnt;
+ u64 sts_data0, sts_data1;
+ int opcode, ring = 0, desc_cnt;
while (count < max) {
desc = &sds_ring->desc_head[consumer];
- sts_data = le64_to_cpu(desc->status_desc_data[0]);
+ sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
- if (!(sts_data & STATUS_OWNER_HOST))
+ if (!(sts_data0 & STATUS_OWNER_HOST))
break;
- desc_cnt = netxen_get_sts_desc_cnt(sts_data);
- ring = netxen_get_sts_type(sts_data);
+ desc_cnt = netxen_get_sts_desc_cnt(sts_data0);
- if (ring > RCV_RING_JUMBO)
- goto skip;
-
- opcode = netxen_get_sts_opcode(sts_data);
+ opcode = netxen_get_sts_opcode(sts_data0);
switch (opcode) {
case NETXEN_NIC_RXPKT_DESC:
case NETXEN_OLD_RXPKT_DESC:
case NETXEN_NIC_SYN_OFFLOAD:
+ ring = netxen_get_sts_type(sts_data0);
+ rxbuf = netxen_process_rcv(adapter, sds_ring,
+ ring, sts_data0);
+ break;
+ case NETXEN_NIC_LRO_DESC:
+ ring = netxen_get_lro_sts_type(sts_data0);
+ sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
+ rxbuf = netxen_process_lro(adapter, sds_ring,
+ ring, sts_data0, sts_data1);
break;
case NETXEN_NIC_RESPONSE_DESC:
netxen_handle_fw_message(desc_cnt, consumer, sds_ring);
@@ -1326,14 +1414,6 @@ netxen_process_rcv_ring(struct nx_host_sds_ring *sds_ring, int max)
WARN_ON(desc_cnt > 1);
- index = netxen_get_sts_refhandle(sts_data);
- length = netxen_get_sts_totallength(sts_data);
- cksum = netxen_get_sts_status(sts_data);
- pkt_offset = netxen_get_sts_pkt_offset(sts_data);
-
- rxbuf = netxen_process_rcv(adapter, ring, index,
- length, cksum, pkt_offset, sds_ring);
-
if (rxbuf)
list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);