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linux/drivers/net/wireless/iwlwifi/iwl-devtrace.h
Wey-Yi Guy a9e1cb6a78 iwlwifi: add continuous uCode event log capability 
In order to help uCode debugging, adding the capability to provide
continuous uCode event logging function.

uCode events is located in round-robin event queue and filled by uCode,
by enable continuous event logging, driver check the write pointer
and log the newly added events in iwl_bg_ucode_trace() timer function.

There is still possibility of missing events if event queue being
wrapped before next event dump; but with this capability, we can have
much better understanding of the uCode behavior during runtime; it can
help to debug the uCode related issues.

Methods to enable/disable the continuous event log:
step 1: enable ucode trace timer
     "echo 1 >
/sys/kernel/debug/ieee80211/phyX/iwlagn/debug/ucode_tracing"
step 2: start ftrace
     sudo ./trace-cmd record -e iwlwifi_ucode:* sleep 1d
step 3: stop ftrace
     sudo ./trace-cmd report trace.dat
step 4: disable ucode trace timer
     "echo 0 >
/sys/kernel/debug/ieee80211/phyX/iwlagn/debug/ucode_tracing"

use "ucode_tracing" debugfs file to display number of event
queue wrapped when driver attempt the continuous event logging. If event
queue being wrapped more than once when driver has opportunity to log
the event; it indicated there are events missing in the event log trace.

This continuous event log function only available for 4965 and newer
NICs.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-12-21 18:56:16 -05:00

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#if !defined(__IWLWIFI_DEVICE_TRACE) || defined(TRACE_HEADER_MULTI_READ)
#define __IWLWIFI_DEVICE_TRACE
#include <linux/tracepoint.h>
#include "iwl-dev.h"
#if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
#undef TRACE_EVENT
#define TRACE_EVENT(name, proto, ...) \
static inline void trace_ ## name(proto) {}
#endif
#define PRIV_ENTRY __field(struct iwl_priv *, priv)
#define PRIV_ASSIGN __entry->priv = priv
#undef TRACE_SYSTEM
#define TRACE_SYSTEM iwlwifi_io
TRACE_EVENT(iwlwifi_dev_ioread32,
TP_PROTO(struct iwl_priv *priv, u32 offs, u32 val),
TP_ARGS(priv, offs, val),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, offs)
__field(u32, val)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->offs = offs;
__entry->val = val;
),
TP_printk("[%p] read io[%#x] = %#x", __entry->priv, __entry->offs, __entry->val)
);
TRACE_EVENT(iwlwifi_dev_iowrite8,
TP_PROTO(struct iwl_priv *priv, u32 offs, u8 val),
TP_ARGS(priv, offs, val),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, offs)
__field(u8, val)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->offs = offs;
__entry->val = val;
),
TP_printk("[%p] write io[%#x] = %#x)", __entry->priv, __entry->offs, __entry->val)
);
TRACE_EVENT(iwlwifi_dev_iowrite32,
TP_PROTO(struct iwl_priv *priv, u32 offs, u32 val),
TP_ARGS(priv, offs, val),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, offs)
__field(u32, val)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->offs = offs;
__entry->val = val;
),
TP_printk("[%p] write io[%#x] = %#x)", __entry->priv, __entry->offs, __entry->val)
);
#undef TRACE_SYSTEM
#define TRACE_SYSTEM iwlwifi_ucode
TRACE_EVENT(iwlwifi_dev_ucode_cont_event,
TP_PROTO(struct iwl_priv *priv, u32 time, u32 data, u32 ev),
TP_ARGS(priv, time, data, ev),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, time)
__field(u32, data)
__field(u32, ev)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->time = time;
__entry->data = data;
__entry->ev = ev;
),
TP_printk("[%p] EVT_LOGT:%010u:0x%08x:%04u",
__entry->priv, __entry->time, __entry->data, __entry->ev)
);
TRACE_EVENT(iwlwifi_dev_ucode_wrap_event,
TP_PROTO(struct iwl_priv *priv, u32 wraps, u32 n_entry, u32 p_entry),
TP_ARGS(priv, wraps, n_entry, p_entry),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, wraps)
__field(u32, n_entry)
__field(u32, p_entry)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->wraps = wraps;
__entry->n_entry = n_entry;
__entry->p_entry = p_entry;
),
TP_printk("[%p] wraps=#%02d n=0x%X p=0x%X",
__entry->priv, __entry->wraps, __entry->n_entry,
__entry->p_entry)
);
#undef TRACE_SYSTEM
#define TRACE_SYSTEM iwlwifi
TRACE_EVENT(iwlwifi_dev_hcmd,
TP_PROTO(struct iwl_priv *priv, void *hcmd, size_t len, u32 flags),
TP_ARGS(priv, hcmd, len, flags),
TP_STRUCT__entry(
PRIV_ENTRY
__dynamic_array(u8, hcmd, len)
__field(u32, flags)
),
TP_fast_assign(
PRIV_ASSIGN;
memcpy(__get_dynamic_array(hcmd), hcmd, len);
__entry->flags = flags;
),
TP_printk("[%p] hcmd %#.2x (%ssync)",
__entry->priv, ((u8 *)__get_dynamic_array(hcmd))[0],
__entry->flags & CMD_ASYNC ? "a" : "")
);
TRACE_EVENT(iwlwifi_dev_rx,
TP_PROTO(struct iwl_priv *priv, void *rxbuf, size_t len),
TP_ARGS(priv, rxbuf, len),
TP_STRUCT__entry(
PRIV_ENTRY
__dynamic_array(u8, rxbuf, len)
),
TP_fast_assign(
PRIV_ASSIGN;
memcpy(__get_dynamic_array(rxbuf), rxbuf, len);
),
TP_printk("[%p] RX cmd %#.2x",
__entry->priv, ((u8 *)__get_dynamic_array(rxbuf))[4])
);
TRACE_EVENT(iwlwifi_dev_tx,
TP_PROTO(struct iwl_priv *priv, void *tfd, size_t tfdlen,
void *buf0, size_t buf0_len,
void *buf1, size_t buf1_len),
TP_ARGS(priv, tfd, tfdlen, buf0, buf0_len, buf1, buf1_len),
TP_STRUCT__entry(
PRIV_ENTRY
__field(size_t, framelen)
__dynamic_array(u8, tfd, tfdlen)
/*
* Do not insert between or below these items,
* we want to keep the frame together (except
* for the possible padding).
*/
__dynamic_array(u8, buf0, buf0_len)
__dynamic_array(u8, buf1, buf1_len)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->framelen = buf0_len + buf1_len;
memcpy(__get_dynamic_array(tfd), tfd, tfdlen);
memcpy(__get_dynamic_array(buf0), buf0, buf0_len);
memcpy(__get_dynamic_array(buf1), buf1, buf0_len);
),
TP_printk("[%p] TX %.2x (%zu bytes)",
__entry->priv,
((u8 *)__get_dynamic_array(buf0))[0],
__entry->framelen)
);
TRACE_EVENT(iwlwifi_dev_ucode_error,
TP_PROTO(struct iwl_priv *priv, u32 desc, u32 time,
u32 data1, u32 data2, u32 line, u32 blink1,
u32 blink2, u32 ilink1, u32 ilink2),
TP_ARGS(priv, desc, time, data1, data2, line,
blink1, blink2, ilink1, ilink2),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, desc)
__field(u32, time)
__field(u32, data1)
__field(u32, data2)
__field(u32, line)
__field(u32, blink1)
__field(u32, blink2)
__field(u32, ilink1)
__field(u32, ilink2)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->desc = desc;
__entry->time = time;
__entry->data1 = data1;
__entry->data2 = data2;
__entry->line = line;
__entry->blink1 = blink1;
__entry->blink2 = blink2;
__entry->ilink1 = ilink1;
__entry->ilink2 = ilink2;
),
TP_printk("[%p] #%02d %010u data 0x%08X 0x%08X line %u, "
"blink 0x%05X 0x%05X ilink 0x%05X 0x%05X",
__entry->priv, __entry->desc, __entry->time, __entry->data1,
__entry->data2, __entry->line, __entry->blink1,
__entry->blink2, __entry->ilink1, __entry->ilink2)
);
TRACE_EVENT(iwlwifi_dev_ucode_event,
TP_PROTO(struct iwl_priv *priv, u32 time, u32 data, u32 ev),
TP_ARGS(priv, time, data, ev),
TP_STRUCT__entry(
PRIV_ENTRY
__field(u32, time)
__field(u32, data)
__field(u32, ev)
),
TP_fast_assign(
PRIV_ASSIGN;
__entry->time = time;
__entry->data = data;
__entry->ev = ev;
),
TP_printk("[%p] EVT_LOGT:%010u:0x%08x:%04u",
__entry->priv, __entry->time, __entry->data, __entry->ev)
);
#endif /* __IWLWIFI_DEVICE_TRACE */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE iwl-devtrace
#include <trace/define_trace.h>
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