ath9k: Add a debugfs file to display reset statistics

Location: <debugfs_path>/ieee80211/phy#/ath9k/reset

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index b2c60690255a..fe1f55f7c292 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -750,6 +750,38 @@ static ssize_t read_file_misc(struct file *file, char __user *user_buf,
         return retval;
 }
 
+static ssize_t read_file_reset(struct file *file, char __user *user_buf,
+                               size_t count, loff_t *ppos)
+{
+        struct ath_softc *sc = file->private_data;
+        char buf[512];
+        unsigned int len = 0;
+
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "Baseband Hang",
+                        sc->debug.stats.reset[RESET_TYPE_BB_HANG]);
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "Baseband Watchdog",
+                        sc->debug.stats.reset[RESET_TYPE_BB_WATCHDOG]);
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "Fatal HW Error",
+                        sc->debug.stats.reset[RESET_TYPE_FATAL_INT]);
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "TX HW error",
+                        sc->debug.stats.reset[RESET_TYPE_TX_ERROR]);
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "TX Path Hang",
+                        sc->debug.stats.reset[RESET_TYPE_TX_HANG]);
+        len += snprintf(buf + len, sizeof(buf) - len,
+                        "%17s: %2d\n", "PLL RX Hang",
+                        sc->debug.stats.reset[RESET_TYPE_PLL_HANG]);
+
+        if (len > sizeof(buf))
+                len = sizeof(buf);
+
+        return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
 void ath_debug_stat_tx(struct ath_softc *sc, struct ath_buf *bf,
                        struct ath_tx_status *ts, struct ath_txq *txq,
                        unsigned int flags)
@@ -837,6 +869,13 @@ static const struct file_operations fops_misc = {
         .llseek = default_llseek,
 };
 
+static const struct file_operations fops_reset = {
+        .read = read_file_reset,
+        .open = ath9k_debugfs_open,
+        .owner = THIS_MODULE,
+        .llseek = default_llseek,
+};
+
 static ssize_t read_file_recv(struct file *file, char __user *user_buf,
                               size_t count, loff_t *ppos)
 {
@@ -1549,6 +1588,8 @@ int ath9k_init_debug(struct ath_hw *ah)
                             &fops_stations);
         debugfs_create_file("misc", S_IRUSR, sc->debug.debugfs_phy, sc,
                             &fops_misc);
+        debugfs_create_file("reset", S_IRUSR, sc->debug.debugfs_phy, sc,
+                            &fops_reset);
         debugfs_create_file("recv", S_IRUSR, sc->debug.debugfs_phy, sc,
                             &fops_recv);
         debugfs_create_file("rx_chainmask", S_IRUSR | S_IWUSR,