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Commit 532c7a35 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

dsa: mv88x6xxx: Add debugfs interface for statistics 



Allow the contents of the statistics counters to be shown in debugfs.
This is particularly useful for the cpu and dsa ports, which cannot be
seen using ethtools -S.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 80c4627b

drivers/net/dsa/mv88e6xxx.c

+59 −0
Original line number Diff line number Diff line
@@ -1730,6 +1730,62 @@ static const struct file_operations mv88e6xxx_atu_fops = { 
	.owner  = THIS_MODULE,

};



static void mv88e6xxx_stats_show_header(struct seq_file *s,

					struct mv88e6xxx_priv_state *ps)

{

	int port;



	seq_puts(s, "      Statistic       ");

	for (port = 0 ; port < ps->num_ports; port++)

		seq_printf(s, "Port %2d  ", port);

	seq_puts(s, "\n");

}



static int mv88e6xxx_stats_show(struct seq_file *s, void *p)

{

	struct dsa_switch *ds = s->private;

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	struct mv88e6xxx_hw_stat *stats = mv88e6xxx_hw_stats;

	int port, stat, max_stats;

	uint64_t value;



	if (have_sw_in_discards(ds))

		max_stats = ARRAY_SIZE(mv88e6xxx_hw_stats);

	else

		max_stats = ARRAY_SIZE(mv88e6xxx_hw_stats) - 3;



	mv88e6xxx_stats_show_header(s, ps);



	mutex_lock(&ps->smi_mutex);



	for (stat = 0; stat < max_stats; stat++) {

		seq_printf(s, "%19s: ", stats[stat].string);

		for (port = 0 ; port < ps->num_ports; port++) {

			_mv88e6xxx_stats_snapshot(ds, port);

			value = _mv88e6xxx_get_ethtool_stat(ds, stat, stats,

							    port);

			seq_printf(s, "%8llu ", value);

		}

		seq_puts(s, "\n");

	}

	mutex_unlock(&ps->smi_mutex);



	return 0;

}



static int mv88e6xxx_stats_open(struct inode *inode, struct file *file)

{

	return single_open(file, mv88e6xxx_stats_show, inode->i_private);

}



static const struct file_operations mv88e6xxx_stats_fops = {

	.open   = mv88e6xxx_stats_open,

	.read   = seq_read,

	.llseek = no_llseek,

	.release = single_release,

	.owner  = THIS_MODULE,

};



int mv88e6xxx_setup_common(struct dsa_switch *ds)

{

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
@@ -1753,6 +1809,9 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds) 
	debugfs_create_file("atu", S_IRUGO, ps->dbgfs, ds,

			    &mv88e6xxx_atu_fops);



	debugfs_create_file("stats", S_IRUGO, ps->dbgfs, ds,

			    &mv88e6xxx_stats_fops);



	return 0;

}