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Commit 8a0a265d authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

dsa: mv88e6xxx: Add debugfs interface for ATU 



Dump the Address Translation Unit via a file in debugfs.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 87c8cefb

drivers/net/dsa/mv88e6xxx.c

+81 −0
Original line number Diff line number Diff line
@@ -1643,6 +1643,84 @@ static const struct file_operations mv88e6xxx_regs_fops = { 
	.owner  = THIS_MODULE,

};



static void mv88e6xxx_atu_show_header(struct seq_file *s)

{

	seq_puts(s, "DB   T/P  Vec State Addr\n");

}



static void mv88e6xxx_atu_show_entry(struct seq_file *s, int dbnum,

				     unsigned char *addr, int data)

{

	bool trunk = !!(data & GLOBAL_ATU_DATA_TRUNK);

	int portvec = ((data & GLOBAL_ATU_DATA_PORT_VECTOR_MASK) >>

		       GLOBAL_ATU_DATA_PORT_VECTOR_SHIFT);

	int state = data & GLOBAL_ATU_DATA_STATE_MASK;



	seq_printf(s, "%03x %5s %10pb   %x   %pM\n",

		   dbnum, (trunk ? "Trunk" : "Port"), &portvec, state, addr);

}



static int mv88e6xxx_atu_show_db(struct seq_file *s, struct dsa_switch *ds,

				 int dbnum)

{

	unsigned char bcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

	unsigned char addr[6];

	int ret, data, state;



	ret = __mv88e6xxx_write_addr(ds, bcast);

	if (ret < 0)

		return ret;



	do {

		ret = _mv88e6xxx_atu_cmd(ds, dbnum, GLOBAL_ATU_OP_GET_NEXT_DB);

		if (ret < 0)

			return ret;

		data = _mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_ATU_DATA);

		if (data < 0)

			return data;



		state = data & GLOBAL_ATU_DATA_STATE_MASK;

		if (state == GLOBAL_ATU_DATA_STATE_UNUSED)

			break;

		ret = __mv88e6xxx_read_addr(ds, addr);

		if (ret < 0)

			return ret;

		mv88e6xxx_atu_show_entry(s, dbnum, addr, data);

	} while (state != GLOBAL_ATU_DATA_STATE_UNUSED);



	return 0;

}



static int mv88e6xxx_atu_show(struct seq_file *s, void *p)

{

	struct dsa_switch *ds = s->private;

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	int dbnum;



	mv88e6xxx_atu_show_header(s);



	for (dbnum = 0; dbnum < 255; dbnum++) {

		mutex_lock(&ps->smi_mutex);

		mv88e6xxx_atu_show_db(s, ds, dbnum);

		mutex_unlock(&ps->smi_mutex);

	}



	return 0;

}



static int mv88e6xxx_atu_open(struct inode *inode, struct file *file)

{

	return single_open(file, mv88e6xxx_atu_show, inode->i_private);

}



static const struct file_operations mv88e6xxx_atu_fops = {

	.open   = mv88e6xxx_atu_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);
@@ -1663,6 +1741,9 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds) 
	debugfs_create_file("regs", S_IRUGO, ps->dbgfs, ds,

			    &mv88e6xxx_regs_fops);



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

			    &mv88e6xxx_atu_fops);



	return 0;

}

drivers/net/dsa/mv88e6xxx.h

+3 −0
Original line number Diff line number Diff line
@@ -193,6 +193,9 @@ 
#define GLOBAL_ATU_OP_FLUSH_NON_STATIC_DB ((6 << 12) | GLOBAL_ATU_OP_BUSY)

#define GLOBAL_ATU_OP_GET_CLR_VIOLATION	  ((7 << 12) | GLOBAL_ATU_OP_BUSY)

#define GLOBAL_ATU_DATA		0x0c

#define GLOBAL_ATU_DATA_TRUNK			BIT(15)

#define GLOBAL_ATU_DATA_PORT_VECTOR_MASK	0x3ff0

#define GLOBAL_ATU_DATA_PORT_VECTOR_SHIFT	4

#define GLOBAL_ATU_DATA_STATE_MASK		0x0f

#define GLOBAL_ATU_DATA_STATE_UNUSED		0x00

#define GLOBAL_ATU_DATA_STATE_UC_MGMT		0x0d