From 8a0a265d192450b7645dde2754fe8fb3f660fb81 Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Sat, 20 Jun 2015 18:42:29 +0200 Subject: [PATCH] dsa: mv88e6xxx: Add debugfs interface for ATU Dump the Address Translation Unit via a file in debugfs. Signed-off-by: Andrew Lunn Signed-off-by: David S. Miller --- 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 e6dbc4a..6e684f3 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 5fc291cb..8b9c76b 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 -- 2.7.4