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cxgb4: expose stats fetched from firmware via debugfs
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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>
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Rahul Lakkireddy authored and David S. Miller committed Jul 12, 2018
1 parent b351b16 commit 31e5f5c
Showing 1 changed file with 164 additions and 0 deletions.
164 changes: 164 additions & 0 deletions drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down Expand Up @@ -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.
Expand Down

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