[net-next-2.6 PATCH 10/20] igb: move alloc_failed and csum_err stats into per rx-ring stat

[Jeff Kirsher <jeffrey.t.kirsher@intel.com>]

From: Alexander Duyck <alexander.h.duyck@intel.com>

The allocation failed and checksum error stats are currently kept as a
global stat.  If we end up allocating the queues to multiple netdevs then
the global counter doesn't make much sense.  For this reason I felt it
necessary to move the alloc_rx_buff_failed stat into the rx_stats
portion of the rx_ring.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/igb/igb.h         |    6 +++---
 drivers/net/igb/igb_ethtool.c |    9 ++++++---
 drivers/net/igb/igb_main.c    |   17 ++++++++---------
 3 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index 00ff274..6a67fa2 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -145,12 +145,15 @@ struct igb_buffer {
 struct igb_tx_queue_stats {
 	u64 packets;
 	u64 bytes;
+	u64 restart_queue;
 };
 
 struct igb_rx_queue_stats {
 	u64 packets;
 	u64 bytes;
 	u64 drops;
+	u64 csum_err;
+	u64 alloc_failed;
 };
 
 struct igb_q_vector {
@@ -241,7 +244,6 @@ struct igb_adapter {
 
 	/* TX */
 	struct igb_ring *tx_ring;      /* One per active queue */
-	unsigned int restart_queue;
 	unsigned long tx_queue_len;
 	u32 txd_cmd;
 	u32 gotc;
@@ -255,8 +257,6 @@ struct igb_adapter {
 	int num_tx_queues;
 	int num_rx_queues;
 
-	u64 hw_csum_err;
-	u32 alloc_rx_buff_failed;
 	u32 gorc;
 	u64 gorc_old;
 	u32 max_frame_size;
diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c
index c48a555..f62430b 100644
--- a/drivers/net/igb/igb_ethtool.c
+++ b/drivers/net/igb/igb_ethtool.c
@@ -84,7 +84,6 @@ static const struct igb_stats igb_gstrings_stats[] = {
 	{ "tx_single_coll_ok", IGB_STAT(stats.scc) },
 	{ "tx_multi_coll_ok", IGB_STAT(stats.mcc) },
 	{ "tx_timeout_count", IGB_STAT(tx_timeout_count) },
-	{ "tx_restart_queue", IGB_STAT(restart_queue) },
 	{ "rx_long_length_errors", IGB_STAT(stats.roc) },
 	{ "rx_short_length_errors", IGB_STAT(stats.ruc) },
 	{ "rx_align_errors", IGB_STAT(stats.algnerrc) },
@@ -95,9 +94,7 @@ static const struct igb_stats igb_gstrings_stats[] = {
 	{ "tx_flow_control_xon", IGB_STAT(stats.xontxc) },
 	{ "tx_flow_control_xoff", IGB_STAT(stats.xofftxc) },
 	{ "rx_long_byte_count", IGB_STAT(stats.gorc) },
-	{ "rx_csum_offload_errors", IGB_STAT(hw_csum_err) },
 	{ "tx_dma_out_of_sync", IGB_STAT(stats.doosync) },
-	{ "alloc_rx_buff_failed", IGB_STAT(alloc_rx_buff_failed) },
 	{ "tx_smbus", IGB_STAT(stats.mgptc) },
 	{ "rx_smbus", IGB_STAT(stats.mgprc) },
 	{ "dropped_smbus", IGB_STAT(stats.mgpdc) },
@@ -2031,6 +2028,8 @@ static void igb_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 			p += ETH_GSTRING_LEN;
 			sprintf(p, "tx_queue_%u_bytes", i);
 			p += ETH_GSTRING_LEN;
+			sprintf(p, "tx_queue_%u_restart", i);
+			p += ETH_GSTRING_LEN;
 		}
 		for (i = 0; i < adapter->num_rx_queues; i++) {
 			sprintf(p, "rx_queue_%u_packets", i);
@@ -2039,6 +2038,10 @@ static void igb_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 			p += ETH_GSTRING_LEN;
 			sprintf(p, "rx_queue_%u_drops", i);
 			p += ETH_GSTRING_LEN;
+			sprintf(p, "rx_queue_%u_csum_err", i);
+			p += ETH_GSTRING_LEN;
+			sprintf(p, "rx_queue_%u_alloc_failed", i);
+			p += ETH_GSTRING_LEN;
 		}
 /*		BUG_ON(p - data != IGB_STATS_LEN * ETH_GSTRING_LEN); */
 		break;
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 04e860d..bdd7bf0 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3562,8 +3562,6 @@ static inline void igb_tx_queue_adv(struct igb_adapter *adapter,
 static int __igb_maybe_stop_tx(struct net_device *netdev,
 			       struct igb_ring *tx_ring, int size)
 {
-	struct igb_adapter *adapter = netdev_priv(netdev);
-
 	netif_stop_subqueue(netdev, tx_ring->queue_index);
 
 	/* Herbert's original patch had:
@@ -3578,7 +3576,7 @@ static int __igb_maybe_stop_tx(struct net_device *netdev,
 
 	/* A reprieve! */
 	netif_wake_subqueue(netdev, tx_ring->queue_index);
-	++adapter->restart_queue;
+	tx_ring->tx_stats.restart_queue++;
 	return 0;
 }
 
@@ -4734,7 +4732,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
 		if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 		    !(test_bit(__IGB_DOWN, &adapter->state))) {
 			netif_wake_subqueue(netdev, tx_ring->queue_index);
-			++adapter->restart_queue;
+			tx_ring->tx_stats.restart_queue++;
 		}
 	}
 
@@ -4801,7 +4799,8 @@ static void igb_receive_skb(struct igb_q_vector *q_vector,
 		napi_gro_receive(&q_vector->napi, skb);
 }
 
-static inline void igb_rx_checksum_adv(struct igb_adapter *adapter,
+static inline void igb_rx_checksum_adv(struct igb_ring *ring,
+                                       struct igb_adapter *adapter,
 				       u32 status_err, struct sk_buff *skb)
 {
 	skb->ip_summed = CHECKSUM_NONE;
@@ -4820,7 +4819,7 @@ static inline void igb_rx_checksum_adv(struct igb_adapter *adapter,
 		 */
 		if (!((adapter->hw.mac.type == e1000_82576) &&
 		      (skb->len == 60)))
-			adapter->hw_csum_err++;
+			ring->rx_stats.csum_err++;
 		/* let the stack verify checksum errors */
 		return;
 	}
@@ -4979,7 +4978,7 @@ send_up:
 		total_bytes += skb->len;
 		total_packets++;
 
-		igb_rx_checksum_adv(adapter, staterr, skb);
+		igb_rx_checksum_adv(rx_ring, adapter, staterr, skb);
 
 		skb->protocol = eth_type_trans(skb, netdev);
 		skb_record_rx_queue(skb, rx_ring->queue_index);
@@ -5046,7 +5045,7 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
 			if (!buffer_info->page) {
 				buffer_info->page = alloc_page(GFP_ATOMIC);
 				if (!buffer_info->page) {
-					adapter->alloc_rx_buff_failed++;
+					rx_ring->rx_stats.alloc_failed++;
 					goto no_buffers;
 				}
 				buffer_info->page_offset = 0;
@@ -5063,7 +5062,7 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
 		if (!buffer_info->skb) {
 			skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 			if (!skb) {
-				adapter->alloc_rx_buff_failed++;
+				rx_ring->rx_stats.alloc_failed++;
 				goto no_buffers;
 			}