The device map is used to route packets between cascaded switches.
Add dumping a switches device map via debugfs.
Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
drivers/net/dsa/mv88e6xxx.c | 41 +++++++++++++++++++++++++++++++++++++++++
drivers/net/dsa/mv88e6xxx.h | 1 +
2 files changed, 42 insertions(+)
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index fc5d4fdfcb02..7e12a31e9dae 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -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;
}
diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index 7cccff202586..a2c9ac0c54ab 100644
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -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
--
2.1.4
--
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