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Date: Sat, 20 Jun 2015 18:42:29 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Guenter Roeck <linux@...ck-us.net>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
Cory Tusar <cory.tusar@...1solutions.com>,
Andrew Lunn <andrew@...n.ch>
Subject: [PATCH 2/6] dsa: mv88e6xxx: Add debugfs interface for ATU
Dump the Address Translation Unit via a file in debugfs.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/dsa/mv88e6xxx.c | 81 +++++++++++++++++++++++++++++++++++++++++++++
drivers/net/dsa/mv88e6xxx.h | 3 ++
2 files changed, 84 insertions(+)
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index e6dbc4a8110e..6e684f3d377c 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -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;
}
diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index 5fc291cbdae0..8b9c76b66ddb 100644
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -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
--
2.1.4
--
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