cxgb4: remove stats fetched from firmware

When running ethtool -S, some stats are requested from firmware.
Since getting these stats via firmware mailbox is slow, some packets
get dropped under heavy load while running ethtool -S.

So, remove these stats from ethtool -S.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
index ddb8b9e..a14a290 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
@@ -115,42 +115,10 @@ static char adapter_stats_strings[][ETH_GSTRING_LEN] = {
        "db_drop                ",
        "db_full                ",
        "db_empty               ",
-       "tcp_ipv4_out_rsts      ",
-       "tcp_ipv4_in_segs       ",
-       "tcp_ipv4_out_segs      ",
-       "tcp_ipv4_retrans_segs  ",
-       "tcp_ipv6_out_rsts      ",
-       "tcp_ipv6_in_segs       ",
-       "tcp_ipv6_out_segs      ",
-       "tcp_ipv6_retrans_segs  ",
-       "usm_ddp_frames         ",
-       "usm_ddp_octets         ",
-       "usm_ddp_drops          ",
-       "rdma_no_rqe_mod_defer  ",
-       "rdma_no_rqe_pkt_defer  ",
-       "tp_err_ofld_no_neigh   ",
-       "tp_err_ofld_cong_defer ",
        "write_coal_success     ",
        "write_coal_fail        ",
 };
 
-static char channel_stats_strings[][ETH_GSTRING_LEN] = {
-       "--------Channel--------- ",
-       "tp_cpl_requests        ",
-       "tp_cpl_responses       ",
-       "tp_mac_in_errs         ",
-       "tp_hdr_in_errs         ",
-       "tp_tcp_in_errs         ",
-       "tp_tcp6_in_errs        ",
-       "tp_tnl_cong_drops      ",
-       "tp_tnl_tx_drops        ",
-       "tp_ofld_vlan_drops     ",
-       "tp_ofld_chan_drops     ",
-       "fcoe_octets_ddp        ",
-       "fcoe_frames_ddp        ",
-       "fcoe_frames_drop       ",
-};
-
 static char loopback_stats_strings[][ETH_GSTRING_LEN] = {
        "-------Loopback----------- ",
        "octets_ok              ",
@@ -187,7 +155,6 @@ static int get_sset_count(struct net_device *dev, int sset)
        case ETH_SS_STATS:
                return ARRAY_SIZE(stats_strings) +
                       ARRAY_SIZE(adapter_stats_strings) +
-                      ARRAY_SIZE(channel_stats_strings) +
                       ARRAY_SIZE(loopback_stats_strings);
        case ETH_SS_PRIV_FLAGS:
                return ARRAY_SIZE(cxgb4_priv_flags_strings);
@@ -252,9 +219,6 @@ static void get_strings(struct net_device *dev, u32 stringset, u8 *data)
                memcpy(data, adapter_stats_strings,
                       sizeof(adapter_stats_strings));
                data += sizeof(adapter_stats_strings);
-               memcpy(data, channel_stats_strings,
-                      sizeof(channel_stats_strings));
-               data += sizeof(channel_stats_strings);
                memcpy(data, loopback_stats_strings,
                       sizeof(loopback_stats_strings));
        } else if (stringset == ETH_SS_PRIV_FLAGS) {
@@ -280,41 +244,10 @@ struct adapter_stats {
        u64 db_drop;
        u64 db_full;
        u64 db_empty;
-       u64 tcp_v4_out_rsts;
-       u64 tcp_v4_in_segs;
-       u64 tcp_v4_out_segs;
-       u64 tcp_v4_retrans_segs;
-       u64 tcp_v6_out_rsts;
-       u64 tcp_v6_in_segs;
-       u64 tcp_v6_out_segs;
-       u64 tcp_v6_retrans_segs;
-       u64 frames;
-       u64 octets;
-       u64 drops;
-       u64 rqe_dfr_mod;
-       u64 rqe_dfr_pkt;
-       u64 ofld_no_neigh;
-       u64 ofld_cong_defer;
        u64 wc_success;
        u64 wc_fail;
 };
 
-struct channel_stats {
-       u64 cpl_req;
-       u64 cpl_rsp;
-       u64 mac_in_errs;
-       u64 hdr_in_errs;
-       u64 tcp_in_errs;
-       u64 tcp6_in_errs;
-       u64 tnl_cong_drops;
-       u64 tnl_tx_drops;
-       u64 ofld_vlan_drops;
-       u64 ofld_chan_drops;
-       u64 octets_ddp;
-       u64 frames_ddp;
-       u64 frames_drop;
-};
-
 static void collect_sge_port_stats(const struct adapter *adap,
                                   const struct port_info *p,
                                   struct queue_port_stats *s)
@@ -337,45 +270,14 @@ static void collect_sge_port_stats(const struct adapter *adap,
 
 static void collect_adapter_stats(struct adapter *adap, struct adapter_stats *s)
 {
-       struct tp_tcp_stats v4, v6;
-       struct tp_rdma_stats rdma_stats;
-       struct tp_err_stats err_stats;
-       struct tp_usm_stats usm_stats;
        u64 val1, val2;
 
        memset(s, 0, sizeof(*s));
 
-       spin_lock(&adap->stats_lock);
-       t4_tp_get_tcp_stats(adap, &v4, &v6, false);
-       t4_tp_get_rdma_stats(adap, &rdma_stats, false);
-       t4_get_usm_stats(adap, &usm_stats, false);
-       t4_tp_get_err_stats(adap, &err_stats, false);
-       spin_unlock(&adap->stats_lock);
-
        s->db_drop = adap->db_stats.db_drop;
        s->db_full = adap->db_stats.db_full;
        s->db_empty = adap->db_stats.db_empty;
 
-       s->tcp_v4_out_rsts = v4.tcp_out_rsts;
-       s->tcp_v4_in_segs = v4.tcp_in_segs;
-       s->tcp_v4_out_segs = v4.tcp_out_segs;
-       s->tcp_v4_retrans_segs = v4.tcp_retrans_segs;
-       s->tcp_v6_out_rsts = v6.tcp_out_rsts;
-       s->tcp_v6_in_segs = v6.tcp_in_segs;
-       s->tcp_v6_out_segs = v6.tcp_out_segs;
-       s->tcp_v6_retrans_segs = v6.tcp_retrans_segs;
-
-       if (is_offload(adap)) {
-               s->frames = usm_stats.frames;
-               s->octets = usm_stats.octets;
-               s->drops = usm_stats.drops;
-               s->rqe_dfr_mod = rdma_stats.rqe_dfr_mod;
-               s->rqe_dfr_pkt = rdma_stats.rqe_dfr_pkt;
-       }
-
-       s->ofld_no_neigh = err_stats.ofld_no_neigh;
-       s->ofld_cong_defer = err_stats.ofld_cong_defer;
-
        if (!is_t4(adap->params.chip)) {
                int v;
 
@@ -389,36 +291,6 @@ static void collect_adapter_stats(struct adapter *adap, struct adapter_stats *s)
        }
 }
 
-static void collect_channel_stats(struct adapter *adap, struct channel_stats *s,
-                                 u8 i)
-{
-       struct tp_cpl_stats cpl_stats;
-       struct tp_err_stats err_stats;
-       struct tp_fcoe_stats fcoe_stats;
-
-       memset(s, 0, sizeof(*s));
-
-       spin_lock(&adap->stats_lock);
-       t4_tp_get_cpl_stats(adap, &cpl_stats, false);
-       t4_tp_get_err_stats(adap, &err_stats, false);
-       t4_get_fcoe_stats(adap, i, &fcoe_stats, false);
-       spin_unlock(&adap->stats_lock);
-
-       s->cpl_req = cpl_stats.req[i];
-       s->cpl_rsp = cpl_stats.rsp[i];
-       s->mac_in_errs = err_stats.mac_in_errs[i];
-       s->hdr_in_errs = err_stats.hdr_in_errs[i];
-       s->tcp_in_errs = err_stats.tcp_in_errs[i];
-       s->tcp6_in_errs = err_stats.tcp6_in_errs[i];
-       s->tnl_cong_drops = err_stats.tnl_cong_drops[i];
-       s->tnl_tx_drops = err_stats.tnl_tx_drops[i];
-       s->ofld_vlan_drops = err_stats.ofld_vlan_drops[i];
-       s->ofld_chan_drops = err_stats.ofld_chan_drops[i];
-       s->octets_ddp = fcoe_stats.octets_ddp;
-       s->frames_ddp = fcoe_stats.frames_ddp;
-       s->frames_drop = fcoe_stats.frames_drop;
-}
-
 static void get_stats(struct net_device *dev, struct ethtool_stats *stats,
                      u64 *data)
 {
@@ -438,11 +310,6 @@ static void get_stats(struct net_device *dev, struct ethtool_stats *stats,
        collect_adapter_stats(adapter, (struct adapter_stats *)data);
        data += sizeof(struct adapter_stats) / sizeof(u64);
 
-       *data++ = (u64)pi->port_id;
-       collect_channel_stats(adapter, (struct channel_stats *)data,
-                             pi->port_id);
-       data += sizeof(struct channel_stats) / sizeof(u64);
-
        *data++ = (u64)pi->port_id;
        memset(&s, 0, sizeof(s));
        t4_get_lb_stats(adapter, pi->port_id, &s);