be2net: Add TX completion error statistics in ethtool

HW reports TX completion errors in TX completion. This patch adds these
counters to ethtool statistics.

Signed-off-by: Kalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 92 insertions, 0 deletions

diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index d9cd88576ffa..d491ac614dcf 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -248,6 +248,13 @@ struct be_tx_stats {
         ulong tx_jiffies;
         u32 tx_stops;
         u32 tx_drv_drops;       /* pkts dropped by driver */
+        /* the error counters are described in be_ethtool.c */
+        u32 tx_hdr_parse_err;
+        u32 tx_dma_err;
+        u32 tx_tso_err;
+        u32 tx_spoof_check_err;
+        u32 tx_qinq_err;
+        u32 tx_internal_parity_err;
         struct u64_stats_sync sync;
         struct u64_stats_sync sync_compl;
 };
diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index d8d7a4a8538f..3a7ade4b313a 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -157,6 +157,34 @@ static const struct be_ethtool_stat et_rx_stats[] = {
  */
 static const struct be_ethtool_stat et_tx_stats[] = {
         {DRVSTAT_TX_INFO(tx_compl)}, /* If moving this member see above note */
+        /* This counter is incremented when the HW encounters an error while
+         * parsing the packet header of an outgoing TX request. This counter is
+         * applicable only for BE2, BE3 and Skyhawk based adapters.
+         */
+        {DRVSTAT_TX_INFO(tx_hdr_parse_err)},
+        /* This counter is incremented when an error occurs in the DMA
+         * operation associated with the TX request from the host to the device.
+         */
+        {DRVSTAT_TX_INFO(tx_dma_err)},
+        /* This counter is incremented when MAC or VLAN spoof checking is
+         * enabled on the interface and the TX request fails the spoof check
+         * in HW.
+         */
+        {DRVSTAT_TX_INFO(tx_spoof_check_err)},
+        /* This counter is incremented when the HW encounters an error while
+         * performing TSO offload. This counter is applicable only for Lancer
+         * adapters.
+         */
+        {DRVSTAT_TX_INFO(tx_tso_err)},
+        /* This counter is incremented when the HW detects Q-in-Q style VLAN
+         * tagging in a packet and such tagging is not expected on the outgoing
+         * interface. This counter is applicable only for Lancer adapters.
+         */
+        {DRVSTAT_TX_INFO(tx_qinq_err)},
+        /* This counter is incremented when the HW detects parity errors in the
+         * packet data. This counter is applicable only for Lancer adapters.
+         */
+        {DRVSTAT_TX_INFO(tx_internal_parity_err)},
         {DRVSTAT_TX_INFO(tx_bytes)},
         {DRVSTAT_TX_INFO(tx_pkts)},
         /* Number of skbs queued for trasmission by the driver */
diff --git a/drivers/net/ethernet/emulex/benet/be_hw.h b/drivers/net/ethernet/emulex/benet/be_hw.h
index 8840c64aaeca..295ee0835ba0 100644
--- a/drivers/net/ethernet/emulex/benet/be_hw.h
+++ b/drivers/net/ethernet/emulex/benet/be_hw.h
@@ -315,6 +315,18 @@ struct be_eth_hdr_wrb {
         u32 dw[4];
 };
 
+/********* Tx Compl Status Encoding *********/
+#define BE_TX_COMP_HDR_PARSE_ERR        0x2
+#define BE_TX_COMP_NDMA_ERR             0x3
+#define BE_TX_COMP_ACL_ERR              0x5
+
+#define LANCER_TX_COMP_LSO_ERR                  0x1
+#define LANCER_TX_COMP_HSW_DROP_MAC_ERR         0x3
+#define LANCER_TX_COMP_HSW_DROP_VLAN_ERR        0x5
+#define LANCER_TX_COMP_QINQ_ERR                 0x7
+#define LANCER_TX_COMP_PARITY_ERR               0xb
+#define LANCER_TX_COMP_DMA_ERR                  0xd
+
 /* TX Compl Queue Descriptor */
 
 /* Pseudo amap definition for eth_tx_compl in which each bit of the
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index aa0e9c142e05..7b6dbf880a66 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2421,11 +2421,49 @@ loop_continue:
         return work_done;
 }
 
+static inline void be_update_tx_err(struct be_tx_obj *txo, u32 status)
+{
+        switch (status) {
+        case BE_TX_COMP_HDR_PARSE_ERR:
+                tx_stats(txo)->tx_hdr_parse_err++;
+                break;
+        case BE_TX_COMP_NDMA_ERR:
+                tx_stats(txo)->tx_dma_err++;
+                break;
+        case BE_TX_COMP_ACL_ERR:
+                tx_stats(txo)->tx_spoof_check_err++;
+                break;
+        }
+}
+
+static inline void lancer_update_tx_err(struct be_tx_obj *txo, u32 status)
+{
+        switch (status) {
+        case LANCER_TX_COMP_LSO_ERR:
+                tx_stats(txo)->tx_tso_err++;
+                break;
+        case LANCER_TX_COMP_HSW_DROP_MAC_ERR:
+        case LANCER_TX_COMP_HSW_DROP_VLAN_ERR:
+                tx_stats(txo)->tx_spoof_check_err++;
+                break;
+        case LANCER_TX_COMP_QINQ_ERR:
+                tx_stats(txo)->tx_qinq_err++;
+                break;
+        case LANCER_TX_COMP_PARITY_ERR:
+                tx_stats(txo)->tx_internal_parity_err++;
+                break;
+        case LANCER_TX_COMP_DMA_ERR:
+                tx_stats(txo)->tx_dma_err++;
+                break;
+        }
+}
+
 static bool be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
                           int budget, int idx)
 {
         struct be_eth_tx_compl *txcp;
         int num_wrbs = 0, work_done;
+        u32 compl_status;
 
         for (work_done = 0; work_done < budget; work_done++) {
                 txcp = be_tx_compl_get(&txo->cq);
@@ -2434,6 +2472,13 @@ static bool be_process_tx(struct be_adapter *adapter, struct be_tx_obj *txo,
                 num_wrbs += be_tx_compl_process(adapter, txo,
                                                 GET_TX_COMPL_BITS(wrb_index,
                                                                   txcp));
+                compl_status = GET_TX_COMPL_BITS(status, txcp);
+                if (compl_status) {
+                        if (lancer_chip(adapter))
+                                lancer_update_tx_err(txo, compl_status);
+                        else
+                                be_update_tx_err(txo, compl_status);
+                }
         }
 
         if (work_done) {