From 3cfd43f484c8d4bcb38db83f7be19fbd4ac8440c Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Mon, 7 Jun 2010 13:11:40 +0900 Subject: [PATCH] ath5k: add debugfs file for queue debugging Signed-off-by: Bruno Randolf Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/debug.c | 66 ++++++++++++++++++++++++++ drivers/net/wireless/ath/ath5k/debug.h | 1 + 2 files changed, 67 insertions(+) diff --git a/drivers/net/wireless/ath/ath5k/debug.c b/drivers/net/wireless/ath/ath5k/debug.c index 41817a294945..0f2e37d85cbd 100644 --- a/drivers/net/wireless/ath/ath5k/debug.c +++ b/drivers/net/wireless/ath/ath5k/debug.c @@ -735,6 +735,66 @@ static const struct file_operations fops_ani = { }; +/* debugfs: queues etc */ + +static ssize_t read_file_queue(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath5k_softc *sc = file->private_data; + char buf[700]; + unsigned int len = 0; + + struct ath5k_txq *txq; + struct ath5k_buf *bf, *bf0; + int i, n = 0; + + len += snprintf(buf+len, sizeof(buf)-len, + "available txbuffers: %d\n", sc->txbuf_len); + + for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) { + txq = &sc->txqs[i]; + + len += snprintf(buf+len, sizeof(buf)-len, + "%02d: %ssetup\n", i, txq->setup ? "" : "not "); + + if (!txq->setup) + continue; + + list_for_each_entry_safe(bf, bf0, &txq->q, list) + n++; + len += snprintf(buf+len, sizeof(buf)-len, " len: %d\n", n); + } + + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static ssize_t write_file_queue(struct file *file, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct ath5k_softc *sc = file->private_data; + char buf[20]; + + if (copy_from_user(buf, userbuf, min(count, sizeof(buf)))) + return -EFAULT; + + if (strncmp(buf, "start", 5) == 0) + ieee80211_wake_queues(sc->hw); + else if (strncmp(buf, "stop", 4) == 0) + ieee80211_stop_queues(sc->hw); + + return count; +} + + +static const struct file_operations fops_queue = { + .read = read_file_queue, + .write = write_file_queue, + .open = ath5k_debugfs_open, + .owner = THIS_MODULE, +}; + + /* init */ void @@ -778,6 +838,11 @@ ath5k_debug_init_device(struct ath5k_softc *sc) S_IWUSR | S_IRUSR, sc->debug.debugfs_phydir, sc, &fops_ani); + + sc->debug.debugfs_queue = debugfs_create_file("queue", + S_IWUSR | S_IRUSR, + sc->debug.debugfs_phydir, sc, + &fops_queue); } void @@ -796,6 +861,7 @@ ath5k_debug_finish_device(struct ath5k_softc *sc) debugfs_remove(sc->debug.debugfs_antenna); debugfs_remove(sc->debug.debugfs_frameerrors); debugfs_remove(sc->debug.debugfs_ani); + debugfs_remove(sc->debug.debugfs_queue); debugfs_remove(sc->debug.debugfs_phydir); } diff --git a/drivers/net/wireless/ath/ath5k/debug.h b/drivers/net/wireless/ath/ath5k/debug.h index bd1658729141..606ae94a9157 100644 --- a/drivers/net/wireless/ath/ath5k/debug.h +++ b/drivers/net/wireless/ath/ath5k/debug.h @@ -77,6 +77,7 @@ struct ath5k_dbg_info { struct dentry *debugfs_antenna; struct dentry *debugfs_frameerrors; struct dentry *debugfs_ani; + struct dentry *debugfs_queue; }; /** -- 2.20.1