bnxt_en: Display function level rx/tx_discard_pkts via ethtool

Add counters to display sum of rx/tx_discard_pkts of all rings as
function level statistics via ethtool.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 8ba14ae..0ea8466 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -140,6 +140,19 @@ reset_coalesce:
 #define BNXT_RX_STATS_EXT_ENTRY(counter)       \
        { BNXT_RX_STATS_EXT_OFFSET(counter), __stringify(counter) }
 
+enum {
+       RX_TOTAL_DISCARDS,
+       TX_TOTAL_DISCARDS,
+};
+
+static struct {
+       u64                     counter;
+       char                    string[ETH_GSTRING_LEN];
+} bnxt_sw_func_stats[] = {
+       {0, "rx_total_discard_pkts"},
+       {0, "tx_total_discard_pkts"},
+};
+
 static const struct {
        long offset;
        char string[ETH_GSTRING_LEN];
@@ -237,6 +250,7 @@ static const struct {
        BNXT_RX_STATS_EXT_ENTRY(resume_roce_pause_events),
 };
 
+#define BNXT_NUM_SW_FUNC_STATS ARRAY_SIZE(bnxt_sw_func_stats)
 #define BNXT_NUM_PORT_STATS ARRAY_SIZE(bnxt_port_stats_arr)
 #define BNXT_NUM_PORT_STATS_EXT ARRAY_SIZE(bnxt_port_stats_ext_arr)
 
@@ -244,6 +258,8 @@ static int bnxt_get_num_stats(struct bnxt *bp)
 {
        int num_stats = BNXT_NUM_STATS * bp->cp_nr_rings;
 
+       num_stats += BNXT_NUM_SW_FUNC_STATS;
+
        if (bp->flags & BNXT_FLAG_PORT_STATS)
                num_stats += BNXT_NUM_PORT_STATS;
 
@@ -279,6 +295,9 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
        if (!bp->bnapi)
                return;
 
+       for (i = 0; i < BNXT_NUM_SW_FUNC_STATS; i++)
+               bnxt_sw_func_stats[i].counter = 0;
+
        for (i = 0; i < bp->cp_nr_rings; i++) {
                struct bnxt_napi *bnapi = bp->bnapi[i];
                struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
@@ -288,7 +307,16 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
                for (k = 0; k < stat_fields; j++, k++)
                        buf[j] = le64_to_cpu(hw_stats[k]);
                buf[j++] = cpr->rx_l4_csum_errors;
+
+               bnxt_sw_func_stats[RX_TOTAL_DISCARDS].counter +=
+                       le64_to_cpu(cpr->hw_stats->rx_discard_pkts);
+               bnxt_sw_func_stats[TX_TOTAL_DISCARDS].counter +=
+                       le64_to_cpu(cpr->hw_stats->tx_discard_pkts);
        }
+
+       for (i = 0; i < BNXT_NUM_SW_FUNC_STATS; i++, j++)
+               buf[j] = bnxt_sw_func_stats[i].counter;
+
        if (bp->flags & BNXT_FLAG_PORT_STATS) {
                __le64 *port_stats = (__le64 *)bp->hw_rx_port_stats;
 
@@ -359,6 +387,11 @@ static void bnxt_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
                        sprintf(buf, "[%d]: rx_l4_csum_errors", i);
                        buf += ETH_GSTRING_LEN;
                }
+               for (i = 0; i < BNXT_NUM_SW_FUNC_STATS; i++) {
+                       strcpy(buf, bnxt_sw_func_stats[i].string);
+                       buf += ETH_GSTRING_LEN;
+               }
+
                if (bp->flags & BNXT_FLAG_PORT_STATS) {
                        for (i = 0; i < BNXT_NUM_PORT_STATS; i++) {
                                strcpy(buf, bnxt_port_stats_arr[i].string);