Commit 01f684de authored by Sujith Manoharan's avatar Sujith Manoharan Committed by John W. Linville
Browse files

ath9k_htc: Add a debugfs file to dump TX slot information



Location: ath9k_htc/phy#/slot
Signed-off-by: default avatarSujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 27876a29
......@@ -338,6 +338,7 @@ struct ath9k_debug {
struct dentry *debugfs_tgt_stats;
struct dentry *debugfs_xmit;
struct dentry *debugfs_recv;
struct dentry *debugfs_slot;
struct ath_tx_stats tx_stats;
struct ath_rx_stats rx_stats;
u32 txrate;
......
......@@ -244,6 +244,41 @@ static const struct file_operations fops_recv = {
.llseek = default_llseek,
};
static ssize_t read_file_slot(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath9k_htc_priv *priv = file->private_data;
char buf[512];
unsigned int len = 0;
spin_lock_bh(&priv->tx.tx_lock);
len += snprintf(buf + len, sizeof(buf) - len, "TX slot bitmap : ");
len += bitmap_scnprintf(buf + len, sizeof(buf) - len,
priv->tx.tx_slot, MAX_TX_BUF_NUM);
len += snprintf(buf + len, sizeof(buf) - len, "\n");
len += snprintf(buf + len, sizeof(buf) - len,
"Used slots : %d\n",
bitmap_weight(priv->tx.tx_slot, MAX_TX_BUF_NUM));
spin_unlock_bh(&priv->tx.tx_lock);
if (len > sizeof(buf))
len = sizeof(buf);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static const struct file_operations fops_slot = {
.read = read_file_slot,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
int ath9k_htc_init_debug(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
......@@ -276,6 +311,12 @@ int ath9k_htc_init_debug(struct ath_hw *ah)
if (!priv->debug.debugfs_recv)
goto err;
priv->debug.debugfs_slot = debugfs_create_file("slot", S_IRUSR,
priv->debug.debugfs_phy,
priv, &fops_slot);
if (!priv->debug.debugfs_slot)
goto err;
return 0;
err:
......@@ -288,6 +329,7 @@ void ath9k_htc_exit_debug(struct ath_hw *ah)
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) common->priv;
debugfs_remove(priv->debug.debugfs_slot);
debugfs_remove(priv->debug.debugfs_recv);
debugfs_remove(priv->debug.debugfs_xmit);
debugfs_remove(priv->debug.debugfs_tgt_stats);
......
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