staging: brcm80211: brcmfmac: add debugfs, display wi-fi statistics

Add debugfs to display wi-fi profile/statistics.
Initially some profile parameters such as dtim_period,
beacon_int will be seen at
/sys/kernel/debug/ieee80211/phy#/netdev:eth#.
This will provide users with current connection status.

Signed-off-by: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
index 5bda856..621521b 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
@@ -333,6 +333,12 @@ static __used s32 wl_update_pmklist(struct net_device *dev,
 
 static void wl_set_mpc(struct net_device *ndev, int mpc);
 
+/*
+* debufs support
+*/
+static int wl_debugfs_add_netdev_params(struct wl_priv *wl);
+static void wl_debugfs_remove_netdev(struct wl_priv *wl);
+
 #define WL_PRIV_GET()                                                  \
        ({                                                              \
        struct wl_iface *ci;                                            \
@@ -3814,6 +3820,8 @@ static s32 __wl_cfg80211_up(struct wl_priv *wl)
 {
        s32 err = 0;
 
+       wl_debugfs_add_netdev_params(wl);
+
        err = wl_config_dongle(wl, false);
        if (unlikely(err))
                return err;
@@ -3851,6 +3859,8 @@ static s32 __wl_cfg80211_down(struct wl_priv *wl)
        clear_bit(WL_STATUS_SCAN_ABORTING, &wl->status);
        clear_bit(WL_STATUS_CONNECTED, &wl->status);
 
+       wl_debugfs_remove_netdev(wl);
+
        return err;
 }
 
@@ -4186,3 +4196,36 @@ static void wl_set_mpc(struct net_device *ndev, int mpc)
        }
        WL_DBG(("MPC : %d\n", mpc));
 }
+
+static int wl_debugfs_add_netdev_params(struct wl_priv *wl)
+{
+       char buf[10+IFNAMSIZ];
+       struct dentry *fd;
+       s32 err = 0;
+
+       sprintf(buf, "netdev:%s", wl_to_ndev(wl)->name);
+       wl->debugfsdir = debugfs_create_dir(buf, wl_to_wiphy(wl)->debugfsdir);
+
+       fd = debugfs_create_u16("beacon_int", S_IRUGO, wl->debugfsdir,
+               (u16 *)&wl->profile->beacon_interval);
+       if (!fd) {
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+       fd = debugfs_create_u8("dtim_period", S_IRUGO, wl->debugfsdir,
+               (u8 *)&wl->profile->dtim_period);
+       if (!fd) {
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+err_out:
+       return err;
+}
+
+static void wl_debugfs_remove_netdev(struct wl_priv *wl)
+{
+       debugfs_remove_recursive(wl->debugfsdir);
+       wl->debugfsdir = NULL;
+}

diff --git a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.h b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.h
index 72d1240..f90ecae 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.h
+++ b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.h
@@ -341,6 +341,7 @@ struct wl_priv {
        bool scan_tried;        /* indicates if first scan attempted */
        u8 *ioctl_buf;  /* ioctl buffer */
        u8 *extra_buf;  /* maily to grab assoc information */
+       struct dentry *debugfsdir;
        u8 ci[0] __attribute__ ((__aligned__(NETDEV_ALIGN)));
 };