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authorWey-Yi Guy <wey-yi.w.guy@intel.com>2009-12-11 01:37:26 +0300
committerJohn W. Linville <linville@tuxdriver.com>2009-12-22 02:56:16 +0300
commita9e1cb6a78ea8a74c49bf76726a2942f636a833b (patch)
treee1f4f083c7154f322b2a65c90a04da817403fcba /drivers/net/wireless/iwlwifi/iwl-devtrace.h
parent696bdee3ba216186e21997d20a839b76158346e6 (diff)
downloadlinux-a9e1cb6a78ea8a74c49bf76726a2942f636a833b.tar.xz
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>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-devtrace.h')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-devtrace.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-devtrace.h b/drivers/net/wireless/iwlwifi/iwl-devtrace.h
index 21361968ab7e..0819f990be6c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-devtrace.h
+++ b/drivers/net/wireless/iwlwifi/iwl-devtrace.h
@@ -65,6 +65,50 @@ TRACE_EVENT(iwlwifi_dev_iowrite32,
);
#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,