cxgb4: expose stats fetched from firmware via debugfs

Expose stats obtained from firmware via debugfs. These stats can't
be part of ethtool -S because the slow firmware mailbox can cause
packet drops under heavy load.

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_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 516c883..511606f 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -2962,6 +2962,169 @@ static const struct file_operations chcr_stats_debugfs_fops = {
         .llseek  = seq_lseek,
         .release = single_release,
 };
+
+#define PRINT_ADAP_STATS(string, value) \
+       seq_printf(seq, "%-25s %-20llu\n", (string), \
+                  (unsigned long long)(value))
+
+#define PRINT_CH_STATS(string, value) \
+do { \
+       seq_printf(seq, "%-25s ", (string)); \
+       for (i = 0; i < adap->params.arch.nchan; i++) \
+               seq_printf(seq, "%-20llu ", \
+                          (unsigned long long)stats.value[i]); \
+       seq_printf(seq, "\n"); \
+} while (0)
+
+#define PRINT_CH_STATS2(string, value) \
+do { \
+       seq_printf(seq, "%-25s ", (string)); \
+       for (i = 0; i < adap->params.arch.nchan; i++) \
+               seq_printf(seq, "%-20llu ", \
+                          (unsigned long long)stats[i].value); \
+       seq_printf(seq, "\n"); \
+} while (0)
+
+static void show_tcp_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_tcp_stats v4, v6;
+
+       spin_lock(&adap->stats_lock);
+       t4_tp_get_tcp_stats(adap, &v4, &v6, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_ADAP_STATS("tcp_ipv4_out_rsts:", v4.tcp_out_rsts);
+       PRINT_ADAP_STATS("tcp_ipv4_in_segs:", v4.tcp_in_segs);
+       PRINT_ADAP_STATS("tcp_ipv4_out_segs:", v4.tcp_out_segs);
+       PRINT_ADAP_STATS("tcp_ipv4_retrans_segs:", v4.tcp_retrans_segs);
+       PRINT_ADAP_STATS("tcp_ipv6_out_rsts:", v6.tcp_out_rsts);
+       PRINT_ADAP_STATS("tcp_ipv6_in_segs:", v6.tcp_in_segs);
+       PRINT_ADAP_STATS("tcp_ipv6_out_segs:", v6.tcp_out_segs);
+       PRINT_ADAP_STATS("tcp_ipv6_retrans_segs:", v6.tcp_retrans_segs);
+}
+
+static void show_ddp_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_usm_stats stats;
+
+       spin_lock(&adap->stats_lock);
+       t4_get_usm_stats(adap, &stats, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_ADAP_STATS("usm_ddp_frames:", stats.frames);
+       PRINT_ADAP_STATS("usm_ddp_octets:", stats.octets);
+       PRINT_ADAP_STATS("usm_ddp_drops:", stats.drops);
+}
+
+static void show_rdma_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_rdma_stats stats;
+
+       spin_lock(&adap->stats_lock);
+       t4_tp_get_rdma_stats(adap, &stats, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_ADAP_STATS("rdma_no_rqe_mod_defer:", stats.rqe_dfr_mod);
+       PRINT_ADAP_STATS("rdma_no_rqe_pkt_defer:", stats.rqe_dfr_pkt);
+}
+
+static void show_tp_err_adapter_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_err_stats stats;
+
+       spin_lock(&adap->stats_lock);
+       t4_tp_get_err_stats(adap, &stats, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_ADAP_STATS("tp_err_ofld_no_neigh:", stats.ofld_no_neigh);
+       PRINT_ADAP_STATS("tp_err_ofld_cong_defer:", stats.ofld_cong_defer);
+}
+
+static void show_cpl_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_cpl_stats stats;
+       u8 i;
+
+       spin_lock(&adap->stats_lock);
+       t4_tp_get_cpl_stats(adap, &stats, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_CH_STATS("tp_cpl_requests:", req);
+       PRINT_CH_STATS("tp_cpl_responses:", rsp);
+}
+
+static void show_tp_err_channel_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_err_stats stats;
+       u8 i;
+
+       spin_lock(&adap->stats_lock);
+       t4_tp_get_err_stats(adap, &stats, false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_CH_STATS("tp_mac_in_errs:", mac_in_errs);
+       PRINT_CH_STATS("tp_hdr_in_errs:", hdr_in_errs);
+       PRINT_CH_STATS("tp_tcp_in_errs:", tcp_in_errs);
+       PRINT_CH_STATS("tp_tcp6_in_errs:", tcp6_in_errs);
+       PRINT_CH_STATS("tp_tnl_cong_drops:", tnl_cong_drops);
+       PRINT_CH_STATS("tp_tnl_tx_drops:", tnl_tx_drops);
+       PRINT_CH_STATS("tp_ofld_vlan_drops:", ofld_vlan_drops);
+       PRINT_CH_STATS("tp_ofld_chan_drops:", ofld_chan_drops);
+}
+
+static void show_fcoe_stats(struct seq_file *seq)
+{
+       struct adapter *adap = seq->private;
+       struct tp_fcoe_stats stats[NCHAN];
+       u8 i;
+
+       spin_lock(&adap->stats_lock);
+       for (i = 0; i < adap->params.arch.nchan; i++)
+               t4_get_fcoe_stats(adap, i, &stats[i], false);
+       spin_unlock(&adap->stats_lock);
+
+       PRINT_CH_STATS2("fcoe_octets_ddp", octets_ddp);
+       PRINT_CH_STATS2("fcoe_frames_ddp", frames_ddp);
+       PRINT_CH_STATS2("fcoe_frames_drop", frames_drop);
+}
+
+#undef PRINT_CH_STATS2
+#undef PRINT_CH_STATS
+#undef PRINT_ADAP_STATS
+
+static int tp_stats_show(struct seq_file *seq, void *v)
+{
+       struct adapter *adap = seq->private;
+
+       seq_puts(seq, "\n--------Adapter Stats--------\n");
+       show_tcp_stats(seq);
+       show_ddp_stats(seq);
+       show_rdma_stats(seq);
+       show_tp_err_adapter_stats(seq);
+
+       seq_puts(seq, "\n-------- Channel Stats --------\n");
+       if (adap->params.arch.nchan == NCHAN)
+               seq_printf(seq, "%-25s %-20s %-20s %-20s %-20s\n",
+                          " ", "channel 0", "channel 1",
+                          "channel 2", "channel 3");
+       else
+               seq_printf(seq, "%-25s %-20s %-20s\n",
+                          " ", "channel 0", "channel 1");
+       show_cpl_stats(seq);
+       show_tp_err_channel_stats(seq);
+       show_fcoe_stats(seq);
+
+       return 0;
+}
+
+DEFINE_SIMPLE_DEBUGFS_FILE(tp_stats);
+
 /* Add an array of Debug FS files.
  */
 void add_debugfs_files(struct adapter *adap,
@@ -3038,6 +3201,7 @@ int t4_setup_debugfs(struct adapter *adap)
                { "blocked_fl", &blocked_fl_fops, 0600, 0 },
                { "meminfo", &meminfo_fops, 0400, 0 },
                { "crypto", &chcr_stats_debugfs_fops, 0400, 0 },
+               { "tp_stats", &tp_stats_debugfs_fops, 0400, 0 },
        };
 
        /* Debug FS nodes common to all T5 and later adapters.