ixgbe: Include offloaded FCoE data into total rx/tx statistics for 82599

Include offloaded FCoE data into total rx/tx statistics for 82599 so they
are properly reflected by ethtool or ifconfig.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 42 insertions, 5 deletions

diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index d5939de8ba28..3c3bf1f07b81 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ixgbe/ixgbe_fcoe.c
@@ -280,7 +280,9 @@ out_noddp_unmap:
  *
  * This checks ddp status.
  *
- * Returns : 0 for success and skb will not be delivered to ULD
+ * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
+ * not passing the skb to ULD, > 0 indicates is the length of data
+ * being ddped.
  */
 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
                    union ixgbe_adv_rx_desc *rx_desc,
@@ -334,6 +336,8 @@ int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
                 /* return 0 to bypass going to ULD for DDPed data */
                 if (fcstat == IXGBE_RXDADV_STAT_FCSTAT_DDP)
                         rc = 0;
+                else
+                        rc = ddp->len;
         }
 
 ddp_out:
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.h b/drivers/net/ixgbe/ixgbe_fcoe.h
index b7f9b63aa49f..c5b50026a897 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.h
+++ b/drivers/net/ixgbe/ixgbe_fcoe.h
@@ -28,6 +28,7 @@
 #ifndef _IXGBE_FCOE_H
 #define _IXGBE_FCOE_H
 
+#include <scsi/fc/fc_fs.h>
 #include <scsi/fc/fc_fcoe.h>
 
 /* shift bits within STAT fo FCSTAT */
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 09994e920d5d..a551a96ce676 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -293,12 +293,24 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 
                         if (cleaned && skb) {
                                 unsigned int segs, bytecount;
+                                unsigned int hlen = skb_headlen(skb);
 
                                 /* gso_segs is currently only valid for tcp */
                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
+#ifdef IXGBE_FCOE
+                                /* adjust for FCoE Sequence Offload */
+                                if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
+                                    && (skb->protocol == htons(ETH_P_FCOE)) &&
+                                    skb_is_gso(skb)) {
+                                        hlen = skb_transport_offset(skb) +
+                                                sizeof(struct fc_frame_header) +
+                                                sizeof(struct fcoe_crc_eof);
+                                        segs = DIV_ROUND_UP(skb->len - hlen,
+                                                skb_shinfo(skb)->gso_size);
+                                }
+#endif /* IXGBE_FCOE */
                                 /* multiply data chunks by size of headers */
-                                bytecount = ((segs - 1) * skb_headlen(skb)) +
-                                            skb->len;
+                                bytecount = ((segs - 1) * hlen) + skb->len;
                                 total_packets += segs;
                                 total_bytes += bytecount;
                         }
@@ -683,6 +695,9 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
         bool cleaned = false;
         int cleaned_count = 0;
         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
+#ifdef IXGBE_FCOE
+        int ddp_bytes = 0;
+#endif /* IXGBE_FCOE */
 
         i = rx_ring->next_to_clean;
         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
@@ -793,9 +808,11 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 #ifdef IXGBE_FCOE
                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
-                if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
-                        if (!ixgbe_fcoe_ddp(adapter, rx_desc, skb))
+                if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
+                        ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
+                        if (!ddp_bytes)
                                 goto next_desc;
+                }
 #endif /* IXGBE_FCOE */
                 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
 
@@ -821,6 +838,21 @@ next_desc:
         if (cleaned_count)
                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 
+#ifdef IXGBE_FCOE
+        /* include DDPed FCoE data */
+        if (ddp_bytes > 0) {
+                unsigned int mss;
+
+                mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
+                        sizeof(struct fc_frame_header) -
+                        sizeof(struct fcoe_crc_eof);
+                if (mss > 512)
+                        mss &= ~511;
+                total_rx_bytes += ddp_bytes;
+                total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
+        }
+#endif /* IXGBE_FCOE */
+
         rx_ring->total_packets += total_rx_packets;
         rx_ring->total_bytes += total_rx_bytes;
         adapter->net_stats.rx_bytes += total_rx_bytes;