dsa: mv88e6xxx: Add debugfs interface for ATU
Dump the Address Translation Unit via a file in debugfs. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1643,6 +1643,84 @@ static const struct file_operations mv88e6xxx_regs_fops = {
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.owner = THIS_MODULE,
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};
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static void mv88e6xxx_atu_show_header(struct seq_file *s)
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{
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seq_puts(s, "DB T/P Vec State Addr\n");
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}
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static void mv88e6xxx_atu_show_entry(struct seq_file *s, int dbnum,
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unsigned char *addr, int data)
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{
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bool trunk = !!(data & GLOBAL_ATU_DATA_TRUNK);
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int portvec = ((data & GLOBAL_ATU_DATA_PORT_VECTOR_MASK) >>
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GLOBAL_ATU_DATA_PORT_VECTOR_SHIFT);
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int state = data & GLOBAL_ATU_DATA_STATE_MASK;
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seq_printf(s, "%03x %5s %10pb %x %pM\n",
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dbnum, (trunk ? "Trunk" : "Port"), &portvec, state, addr);
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}
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static int mv88e6xxx_atu_show_db(struct seq_file *s, struct dsa_switch *ds,
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int dbnum)
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{
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unsigned char bcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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unsigned char addr[6];
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int ret, data, state;
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ret = __mv88e6xxx_write_addr(ds, bcast);
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if (ret < 0)
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return ret;
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do {
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ret = _mv88e6xxx_atu_cmd(ds, dbnum, GLOBAL_ATU_OP_GET_NEXT_DB);
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if (ret < 0)
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return ret;
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data = _mv88e6xxx_reg_read(ds, REG_GLOBAL, GLOBAL_ATU_DATA);
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if (data < 0)
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return data;
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state = data & GLOBAL_ATU_DATA_STATE_MASK;
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if (state == GLOBAL_ATU_DATA_STATE_UNUSED)
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break;
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ret = __mv88e6xxx_read_addr(ds, addr);
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if (ret < 0)
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return ret;
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mv88e6xxx_atu_show_entry(s, dbnum, addr, data);
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} while (state != GLOBAL_ATU_DATA_STATE_UNUSED);
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return 0;
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}
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static int mv88e6xxx_atu_show(struct seq_file *s, void *p)
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{
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struct dsa_switch *ds = s->private;
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struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
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int dbnum;
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mv88e6xxx_atu_show_header(s);
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for (dbnum = 0; dbnum < 255; dbnum++) {
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mutex_lock(&ps->smi_mutex);
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mv88e6xxx_atu_show_db(s, ds, dbnum);
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mutex_unlock(&ps->smi_mutex);
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}
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return 0;
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}
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static int mv88e6xxx_atu_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mv88e6xxx_atu_show, inode->i_private);
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}
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static const struct file_operations mv88e6xxx_atu_fops = {
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.open = mv88e6xxx_atu_open,
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.read = seq_read,
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.llseek = no_llseek,
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.release = single_release,
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.owner = THIS_MODULE,
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};
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int mv88e6xxx_setup_common(struct dsa_switch *ds)
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{
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struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
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@ -1663,6 +1741,9 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds)
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debugfs_create_file("regs", S_IRUGO, ps->dbgfs, ds,
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&mv88e6xxx_regs_fops);
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debugfs_create_file("atu", S_IRUGO, ps->dbgfs, ds,
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&mv88e6xxx_atu_fops);
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return 0;
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}
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@ -193,6 +193,9 @@
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#define GLOBAL_ATU_OP_FLUSH_NON_STATIC_DB ((6 << 12) | GLOBAL_ATU_OP_BUSY)
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#define GLOBAL_ATU_OP_GET_CLR_VIOLATION ((7 << 12) | GLOBAL_ATU_OP_BUSY)
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#define GLOBAL_ATU_DATA 0x0c
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#define GLOBAL_ATU_DATA_TRUNK BIT(15)
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#define GLOBAL_ATU_DATA_PORT_VECTOR_MASK 0x3ff0
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#define GLOBAL_ATU_DATA_PORT_VECTOR_SHIFT 4
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#define GLOBAL_ATU_DATA_STATE_MASK 0x0f
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#define GLOBAL_ATU_DATA_STATE_UNUSED 0x00
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#define GLOBAL_ATU_DATA_STATE_UC_MGMT 0x0d
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