qlcnic: additional driver statistics

Added additional driver statistics to track errors in rcv/tx path.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 21 insertions, 2 deletions

diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 28c148cbe37b..6c1da71025e1 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -428,6 +428,10 @@ struct qlcnic_adapter_stats {
         u64  xmit_on;
         u64  xmit_off;
         u64  skb_alloc_failure;
+        u64  null_skb;
+        u64  null_rxbuf;
+        u64  rx_dma_map_error;
+        u64  tx_dma_map_error;
 };
 
 /*
diff --git a/drivers/net/qlcnic/qlcnic_ethtool.c b/drivers/net/qlcnic/qlcnic_ethtool.c
index 08d6f105371f..6cdc5ebb7411 100644
--- a/drivers/net/qlcnic/qlcnic_ethtool.c
+++ b/drivers/net/qlcnic/qlcnic_ethtool.c
@@ -69,6 +69,14 @@ static const struct qlcnic_stats qlcnic_gstrings_stats[] = {
                 QLC_SIZEOF(stats.xmit_off), QLC_OFF(stats.xmit_off)},
         {"skb_alloc_failure", QLC_SIZEOF(stats.skb_alloc_failure),
                 QLC_OFF(stats.skb_alloc_failure)},
+        {"null skb",
+                QLC_SIZEOF(stats.null_skb), QLC_OFF(stats.null_skb)},
+        {"null rxbuf",
+                QLC_SIZEOF(stats.null_rxbuf), QLC_OFF(stats.null_rxbuf)},
+        {"rx dma map error", QLC_SIZEOF(stats.rx_dma_map_error),
+                                         QLC_OFF(stats.rx_dma_map_error)},
+        {"tx dma map error", QLC_SIZEOF(stats.tx_dma_map_error),
+                                         QLC_OFF(stats.tx_dma_map_error)},
 
 };
 
diff --git a/drivers/net/qlcnic/qlcnic_init.c b/drivers/net/qlcnic/qlcnic_init.c
index 01ce74ee99f9..9ef9f58f84dd 100644
--- a/drivers/net/qlcnic/qlcnic_init.c
+++ b/drivers/net/qlcnic/qlcnic_init.c
@@ -1287,6 +1287,7 @@ qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
                         rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 
         if (pci_dma_mapping_error(pdev, dma)) {
+                adapter->stats.rx_dma_map_error++;
                 dev_kfree_skb_any(skb);
                 buffer->skb = NULL;
                 return -ENOMEM;
@@ -1311,8 +1312,10 @@ static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
                         PCI_DMA_FROMDEVICE);
 
         skb = buffer->skb;
-        if (!skb)
+        if (!skb) {
+                adapter->stats.null_skb++;
                 goto no_skb;
+        }
 
         if (likely(adapter->rx_csum && cksum == STATUS_CKSUM_OK)) {
                 adapter->stats.csummed++;
@@ -1502,6 +1505,8 @@ qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
 
                 if (rxbuf)
                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
+                else
+                        adapter->stats.null_rxbuf++;
 
 skip:
                 for (; desc_cnt > 0; desc_cnt--) {
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index e4fd5dcdfb4c..5845dc0616b1 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -1589,8 +1589,10 @@ qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 
         pdev = adapter->pdev;
 
-        if (qlcnic_map_tx_skb(pdev, skb, pbuf))
+        if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
+                adapter->stats.tx_dma_map_error++;
                 goto drop_packet;
+        }
 
         pbuf->skb = skb;
         pbuf->frag_count = frag_count;