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iwlwifi: new debugging feature for dumping data traffic

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The traffic buffer will only beallocated and used if either bit 23
(IWL_DX_TX) or bit 24 (IWL_DL_RX) of "debug" is set;
example: "debug=0x800000" - log tx data traffic
         "debug=0x1000000" - log rx data traffic
         "debug=0x1800000" - log both tx and rx traffic

The traffic log will store the beginning portion (64 bytes)  of the
latest 256 of tx and rx packets in the round-robbin buffer for
debugging,
user can examine the log through debugfs file.

How to display the current logged tx/rx traffic and txfifo and rxfifo
read/write point:
"cat traffic_log" in /sys/kernel/debug/ieee80211/phy0/iwlagn/debug
directory

By echo "0" to traffic_log file will empty the traffic log buffer and
reset both tx and rx taffic log index to 0.

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>
This commit is contained in:
Wey-Yi Guy
2009-08-07 15:41:39 -07:00
committed by John W. Linville
parent 7aafef1c6e
commit 20594eb0da
10 changed files with 262 additions and 5 deletions
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4
drivers/net/wireless/iwlwifi/iwl-debug.h
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@ -72,6 +72,7 @@ struct iwl_debugfs {
const char *name;
struct dentry *dir_drv;
struct dentry *dir_data;
struct dentry *dir_debug;
struct dentry *dir_rf;
struct dir_data_files {
struct dentry *file_sram;
@ -95,6 +96,9 @@ struct iwl_debugfs {
struct dentry *file_disable_chain_noise;
struct dentry *file_disable_tx_power;
} dbgfs_rf_files;
struct dir_debug_files {
struct dentry *file_traffic_log;
} dbgfs_debug_files;
u32 sram_offset;
u32 sram_len;
};