diff options
| author |   Andrew Lunn <andrew@lunn.ch> | 2015-06-20 18:42:32 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-06-23 06:33:41 -0700 |
| commit | d35bd876afe88e4fe781a4edc376d03eb9d3dcf3 (patch) | |
| tree | 44ace2c27fbddbfdc1ff535e15ed409d27d5c909 | |
| parent | dsa: mv88x6xxx: Add debugfs interface for statistics (diff) | |
| download | linux-dev-d35bd876afe88e4fe781a4edc376d03eb9d3dcf3.tar.xz linux-dev-d35bd876afe88e4fe781a4edc376d03eb9d3dcf3.zip | |
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: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.c | 41 | ||||
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx.h | 1 |
2 files changed, 42 insertions, 0 deletions
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 |