0e4722524d
This adds a few tracepoints to ath5k driver transmit and receive callbacks in order to record packet traffic. We record the entire packet in the trace buffer so that the data can be extracted with trace-cmd and external plugins. Compared to the previous debugging calls, this approach removes an out-of-line function call from the tx and rx paths in the compiled-in-but-disabled case, while improving the ability to process the logged data. A new option, CONFIG_ATH5K_TRACER, is added so that one may disable the tracepoints completely. Signed-off-by: Bob Copeland <me@bobcopeland.com> Acked-by: Bruno Randolf <br1@einfach.org> Acked-by: Nick Kossifidis <mickflemm@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
#if !defined(__TRACE_ATH5K_H) || defined(TRACE_HEADER_MULTI_READ)
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#define __TRACE_ATH5K_H
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#include <linux/tracepoint.h>
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#include "base.h"
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#ifndef CONFIG_ATH5K_TRACER
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, ...) \
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static inline void trace_ ## name(proto) {}
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#endif
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struct sk_buff;
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#define PRIV_ENTRY __field(struct ath5k_softc *, priv)
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#define PRIV_ASSIGN __entry->priv = priv
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM ath5k
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TRACE_EVENT(ath5k_rx,
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TP_PROTO(struct ath5k_softc *priv, struct sk_buff *skb),
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TP_ARGS(priv, skb),
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TP_STRUCT__entry(
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PRIV_ENTRY
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__field(unsigned long, skbaddr)
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__dynamic_array(u8, frame, skb->len)
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),
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TP_fast_assign(
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PRIV_ASSIGN;
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__entry->skbaddr = (unsigned long) skb;
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memcpy(__get_dynamic_array(frame), skb->data, skb->len);
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),
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TP_printk(
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"[%p] RX skb=%lx", __entry->priv, __entry->skbaddr
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)
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);
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TRACE_EVENT(ath5k_tx,
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TP_PROTO(struct ath5k_softc *priv, struct sk_buff *skb,
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struct ath5k_txq *q),
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TP_ARGS(priv, skb, q),
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TP_STRUCT__entry(
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PRIV_ENTRY
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__field(unsigned long, skbaddr)
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__field(u8, qnum)
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__dynamic_array(u8, frame, skb->len)
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),
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TP_fast_assign(
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PRIV_ASSIGN;
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__entry->skbaddr = (unsigned long) skb;
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__entry->qnum = (u8) q->qnum;
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memcpy(__get_dynamic_array(frame), skb->data, skb->len);
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),
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TP_printk(
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"[%p] TX skb=%lx q=%d", __entry->priv, __entry->skbaddr,
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__entry->qnum
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)
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);
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TRACE_EVENT(ath5k_tx_complete,
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TP_PROTO(struct ath5k_softc *priv, struct sk_buff *skb,
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struct ath5k_txq *q, struct ath5k_tx_status *ts),
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TP_ARGS(priv, skb, q, ts),
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TP_STRUCT__entry(
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PRIV_ENTRY
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__field(unsigned long, skbaddr)
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__field(u8, qnum)
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__field(u8, ts_status)
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__field(s8, ts_rssi)
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__field(u8, ts_antenna)
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),
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TP_fast_assign(
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PRIV_ASSIGN;
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__entry->skbaddr = (unsigned long) skb;
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__entry->qnum = (u8) q->qnum;
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__entry->ts_status = ts->ts_status;
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__entry->ts_rssi = ts->ts_rssi;
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__entry->ts_antenna = ts->ts_antenna;
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),
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TP_printk(
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"[%p] TX end skb=%lx q=%d stat=%x rssi=%d ant=%x",
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__entry->priv, __entry->skbaddr, __entry->qnum,
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__entry->ts_status, __entry->ts_rssi, __entry->ts_antenna
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)
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);
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#endif /* __TRACE_ATH5K_H */
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#ifdef CONFIG_ATH5K_TRACER
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH ../../drivers/net/wireless/ath/ath5k
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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#endif
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