Commit d35bd876 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

dsa: mv88x6xxx: Add debugfs interface for device map 



The device map is used to route packets between cascaded switches.
Add dumping a switches device map via debugfs.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 532c7a35

drivers/net/dsa/mv88e6xxx.c

+41 −0
Original line number Diff line number Diff line
@@ -1786,6 +1786,45 @@ static const struct file_operations mv88e6xxx_stats_fops = { 
	.owner  = THIS_MODULE,

};



static int mv88e6xxx_device_map_show(struct seq_file *s, void *p)

{

	struct dsa_switch *ds = s->private;

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	int target, ret;



	seq_puts(s, "Target Port\n");



	mutex_lock(&ps->smi_mutex);

	for (target = 0; target < 32; target++) {

		ret = _mv88e6xxx_reg_write(

			ds, REG_GLOBAL2, GLOBAL2_DEVICE_MAPPING,

			target << GLOBAL2_DEVICE_MAPPING_TARGET_SHIFT);

		if (ret < 0)

			goto out;

		ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL2,

					  GLOBAL2_DEVICE_MAPPING);

		seq_printf(s, "  %2d   %2d\n", target,

			   ret & GLOBAL2_DEVICE_MAPPING_PORT_MASK);

	}

out:

	mutex_unlock(&ps->smi_mutex);



	return 0;

}



static int mv88e6xxx_device_map_open(struct inode *inode, struct file *file)

{

	return single_open(file, mv88e6xxx_device_map_show, inode->i_private);

}



static const struct file_operations mv88e6xxx_device_map_fops = {

	.open   = mv88e6xxx_device_map_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);
@@ -1812,6 +1851,8 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds) 
	debugfs_create_file("stats", S_IRUGO, ps->dbgfs, ds,

			    &mv88e6xxx_stats_fops);



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

			    &mv88e6xxx_device_map_fops);

	return 0;

}

drivers/net/dsa/mv88e6xxx.h

+1 −0
Original line number Diff line number Diff line
@@ -260,6 +260,7 @@ 
#define GLOBAL2_DEVICE_MAPPING	0x06

#define GLOBAL2_DEVICE_MAPPING_UPDATE		BIT(15)

#define GLOBAL2_DEVICE_MAPPING_TARGET_SHIFT	8

#define GLOBAL2_DEVICE_MAPPING_PORT_MASK	0x0f

#define GLOBAL2_TRUNK_MASK	0x07

#define GLOBAL2_TRUNK_MASK_UPDATE		BIT(15)

#define GLOBAL2_TRUNK_MASK_NUM_SHIFT		12