iwl3945: add debugfs support

Add debugfs support to 3945 driver to display rs info.

Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index bfeef70..76100d5 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -63,6 +63,9 @@ struct iwl3945_rs_sta {
        u8 ibss_sta_added;
        struct timer_list rate_scale_flush;
        struct iwl3945_rate_scale_data win[IWL_RATE_COUNT];
+#ifdef CONFIG_MAC80211_DEBUGFS
+       struct dentry *rs_sta_dbgfs_stats_table_file;
+#endif
 
        /* used to be in sta_info */
        int last_txrate_idx;
@@ -772,6 +775,60 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta,
        IWL_DEBUG_RATE("leave: %d\n", index);
 }
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+static int iwl3945_open_file_generic(struct inode *inode, struct file *file)
+{
+       file->private_data = inode->i_private;
+       return 0;
+}
+
+static ssize_t iwl3945_sta_dbgfs_stats_table_read(struct file *file,
+                                                 char __user *user_buf,
+                                                 size_t count, loff_t *ppos)
+{
+       char buff[1024];
+       int desc = 0;
+       int j;
+       struct iwl3945_rs_sta *lq_sta = file->private_data;
+
+       desc += sprintf(buff + desc, "tx packets=%d last rate index=%d\n"
+                       "rate=0x%X flush time %d\n",
+                       lq_sta->tx_packets,
+                       lq_sta->last_txrate_idx,
+                       lq_sta->start_rate, jiffies_to_msecs(lq_sta->flush_time));
+       for (j = 0; j < IWL_RATE_COUNT; j++) {
+               desc += sprintf(buff+desc,
+                               "counter=%d success=%d %%=%d\n",
+                               lq_sta->win[j].counter,
+                               lq_sta->win[j].success_counter,
+                               lq_sta->win[j].success_ratio);
+       }
+       return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
+}
+
+static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
+       .read = iwl3945_sta_dbgfs_stats_table_read,
+       .open = iwl3945_open_file_generic,
+};
+
+static void iwl3945_add_debugfs(void *priv, void *priv_sta,
+                               struct dentry *dir)
+{
+       struct iwl3945_rs_sta *lq_sta = priv_sta;
+
+       lq_sta->rs_sta_dbgfs_stats_table_file =
+               debugfs_create_file("rate_stats_table", 0600, dir,
+               lq_sta, &rs_sta_dbgfs_stats_table_ops);
+
+}
+
+static void iwl3945_remove_debugfs(void *priv, void *priv_sta)
+{
+       struct iwl3945_rs_sta *lq_sta = priv_sta;
+       debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
+}
+#endif
+
 static struct rate_control_ops rs_ops = {
        .module = NULL,
        .name = RS_NAME,
@@ -782,6 +839,11 @@ static struct rate_control_ops rs_ops = {
        .free = rs_free,
        .alloc_sta = rs_alloc_sta,
        .free_sta = rs_free_sta,
+#ifdef CONFIG_MAC80211_DEBUGFS
+       .add_sta_debugfs = iwl3945_add_debugfs,
+       .remove_sta_debugfs = iwl3945_remove_debugfs,
+#endif
+
 };
 
 void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)