rt2x00: Add TX/RX frame dumping facility
This adds TX/RX frame dumping capabilities through debugfs.
The intention is that with this approach debugging of rt2x00 is
simplified since _all_ frames going in and out of the device
are send to debugfs as well along with additional information
like the hardware descriptor.
Based on the patch by Mattias Nissler.
Mattias also has some tools that will make the dumped frames
available to wireshark: http://www-user.rhrk.uni-kl.de/~nissler/rt2x00/
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 4f32ee8..48e2515 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -28,6 +28,7 @@
#include "rt2x00.h"
#include "rt2x00lib.h"
+#include "rt2x00dump.h"
/*
* Ring handler.
@@ -511,9 +512,11 @@
}
/*
- * Send the tx_status to mac80211,
- * that method also cleans up the skb structure.
+ * Send the tx_status to mac80211 & debugfs.
+ * mac80211 will clean up the skb structure.
*/
+ get_skb_desc(entry->skb)->frame_type = DUMP_FRAME_TXDONE;
+ rt2x00debug_dump_frame(rt2x00dev, entry->skb);
ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
entry->skb = NULL;
}
@@ -563,8 +566,10 @@
rx_status->antenna = rt2x00dev->link.ant.active.rx;
/*
- * Send frame to mac80211
+ * Send frame to mac80211 & debugfs
*/
+ get_skb_desc(skb)->frame_type = DUMP_FRAME_RXDONE;
+ rt2x00debug_dump_frame(rt2x00dev, skb);
ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
}
EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
@@ -715,6 +720,15 @@
*/
skbdesc->entry->skb = skb;
memcpy(&skbdesc->entry->tx_status.control, control, sizeof(*control));
+
+ /*
+ * The frame has been completely initialized and ready
+ * for sending to the device. The caller will push the
+ * frame to the device, but we are going to push the
+ * frame to debugfs here.
+ */
+ skbdesc->frame_type = DUMP_FRAME_TX;
+ rt2x00debug_dump_frame(rt2x00dev, skb);
}
EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);