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authorWey-Yi Guy <wey-yi.w.guy@intel.com>2009-08-07 15:41:39 -0700
committerJohn W. Linville <linville@tuxdriver.com>2009-08-14 09:13:46 -0400
commit20594eb0daa67f7a0cc19d74a1bafceb1bb09f4a (patch)
tree9ae022adef73139b524dcd7dde9c6f02809e8cf1 /drivers/net
parent7aafef1c6e2e24f9a10dc2972bf0ee70624ccc47 (diff)
iwlwifi: new debugging feature for dumping data traffic
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-3945.c1
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-agn.c11
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-core.c100
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-core.h28
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-debug.h4
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-debugfs.c102
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-dev.h6
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c1
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-tx.c1
-rw-r--r--drivers/net/wireless/iwlwifi/iwl3945-base.c13
10 files changed, 262 insertions, 5 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 9e33507661d..bfd509f7af2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -679,6 +679,7 @@ static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
/* Set "1" to report good data frames in groups of 100 */
iwl3945_dbg_report_frame(priv, pkt, header, 1);
+ iwl_dbg_log_rx_data_frame(priv, le16_to_cpu(rx_hdr->len), header);
if (network_packet) {
priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 24c1ae6b816..c9a1aacb243 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -2476,9 +2476,12 @@ static ssize_t store_debug_level(struct device *d,
ret = strict_strtoul(buf, 0, &val);
if (ret)
IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
- else
+ else {
priv->debug_level = val;
-
+ if (iwl_alloc_traffic_mem(priv))
+ IWL_ERR(priv,
+ "Not enough memory to generate traffic log\n");
+ }
return strnlen(buf, count);
}
@@ -2819,6 +2822,8 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
#ifdef CONFIG_IWLWIFI_DEBUG
atomic_set(&priv->restrict_refcnt, 0);
#endif
+ if (iwl_alloc_traffic_mem(priv))
+ IWL_ERR(priv, "Not enough memory to generate traffic log\n");
/**************************
* 2. Initializing PCI bus
@@ -3003,6 +3008,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_disable_device(pdev);
out_ieee80211_free_hw:
ieee80211_free_hw(priv->hw);
+ iwl_free_traffic_mem(priv);
out:
return err;
}
@@ -3061,6 +3067,7 @@ static void __devexit iwl_pci_remove(struct pci_dev *pdev)
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
+ iwl_free_traffic_mem(priv);
free_irq(priv->pci_dev->irq, priv);
pci_disable_msi(priv->pci_dev);
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 5315d347a00..1ae2ce3512c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -2953,6 +2953,106 @@ void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
}
EXPORT_SYMBOL(iwl_mac_reset_tsf);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+
+#define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
+
+void iwl_reset_traffic_log(struct iwl_priv *priv)
+{
+ priv->tx_traffic_idx = 0;
+ priv->rx_traffic_idx = 0;
+ if (priv->tx_traffic)
+ memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
+ if (priv->rx_traffic)
+ memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
+}
+
+int iwl_alloc_traffic_mem(struct iwl_priv *priv)
+{
+ u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
+
+ if (iwl_debug_level & IWL_DL_TX) {
+ if (!priv->tx_traffic) {
+ priv->tx_traffic =
+ kzalloc(traffic_size, GFP_KERNEL);
+ if (!priv->tx_traffic)
+ return -ENOMEM;
+ }
+ }
+ if (iwl_debug_level & IWL_DL_RX) {
+ if (!priv->rx_traffic) {
+ priv->rx_traffic =
+ kzalloc(traffic_size, GFP_KERNEL);
+ if (!priv->rx_traffic)
+ return -ENOMEM;
+ }
+ }
+ iwl_reset_traffic_log(priv);
+ return 0;
+}
+EXPORT_SYMBOL(iwl_alloc_traffic_mem);
+
+void iwl_free_traffic_mem(struct iwl_priv *priv)
+{
+ kfree(priv->tx_traffic);
+ priv->tx_traffic = NULL;
+
+ kfree(priv->rx_traffic);
+ priv->rx_traffic = NULL;
+}
+EXPORT_SYMBOL(iwl_free_traffic_mem);
+
+void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+ __le16 fc;
+ u16 len;
+
+ if (likely(!(iwl_debug_level & IWL_DL_TX)))
+ return;
+
+ if (!priv->tx_traffic)
+ return;
+
+ fc = header->frame_control;
+ if (ieee80211_is_data(fc)) {
+ len = (length > IWL_TRAFFIC_ENTRY_SIZE)
+ ? IWL_TRAFFIC_ENTRY_SIZE : length;
+ memcpy((priv->tx_traffic +
+ (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
+ header, len);
+ priv->tx_traffic_idx =
+ (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
+ }
+}
+EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
+
+void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+ __le16 fc;
+ u16 len;
+
+ if (likely(!(iwl_debug_level & IWL_DL_RX)))
+ return;
+
+ if (!priv->rx_traffic)
+ return;
+
+ fc = header->frame_control;
+ if (ieee80211_is_data(fc)) {
+ len = (length > IWL_TRAFFIC_ENTRY_SIZE)
+ ? IWL_TRAFFIC_ENTRY_SIZE : length;
+ memcpy((priv->rx_traffic +
+ (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
+ header, len);
+ priv->rx_traffic_idx =
+ (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
+ }
+}
+EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
+#endif
+
#ifdef CONFIG_PM
int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index dd66148a789..40a9167cacc 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -300,7 +300,35 @@ void iwl_config_ap(struct iwl_priv *priv);
int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats);
void iwl_mac_reset_tsf(struct ieee80211_hw *hw);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+int iwl_alloc_traffic_mem(struct iwl_priv *priv);
+void iwl_free_traffic_mem(struct iwl_priv *priv);
+void iwl_reset_traffic_log(struct iwl_priv *priv);
+void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header);
+void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header);
+#else
+static inline int iwl_alloc_traffic_mem(struct iwl_priv *priv)
+{
+ return 0;
+}
+static inline void iwl_free_traffic_mem(struct iwl_priv *priv)
+{
+}
+static inline void iwl_reset_traffic_log(struct iwl_priv *priv)
+{
+}
+static inline void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+}
+static inline void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
+ u16 length, struct ieee80211_hdr *header)
+{
+}
+#endif
/*****************************************************
* RX handlers.
* **************************************************/
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 09af046927a..335ff5c4396 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -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;
};
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 6748a3fb966..031538c4206 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -712,6 +712,104 @@ DEBUGFS_READ_FILE_OPS(led);
DEBUGFS_READ_FILE_OPS(thermal_throttling);
DEBUGFS_READ_WRITE_FILE_OPS(disable_ht40);
+static ssize_t iwl_dbgfs_traffic_log_read(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct iwl_priv *priv = file->private_data;
+ int pos = 0, ofs = 0;
+ int cnt = 0, entry;
+ struct iwl_tx_queue *txq;
+ struct iwl_queue *q;
+ struct iwl_rx_queue *rxq = &priv->rxq;
+ char *buf;
+ int bufsz = ((IWL_TRAFFIC_ENTRIES * IWL_TRAFFIC_ENTRY_SIZE * 64) * 2) +
+ (IWL_MAX_NUM_QUEUES * 32 * 8) + 400;
+ const u8 *ptr;
+ ssize_t ret;
+
+ buf = kzalloc(bufsz, GFP_KERNEL);
+ if (!buf) {
+ IWL_ERR(priv, "Can not allocate buffer\n");
+ return -ENOMEM;
+ }
+ pos += scnprintf(buf + pos, bufsz - pos, "Tx Queue\n");
+ for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
+ txq = &priv->txq[cnt];
+ q = &txq->q;
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "q[%d]: read_ptr: %u, write_ptr: %u\n",
+ cnt, q->read_ptr, q->write_ptr);
+ }
+ if (priv->tx_traffic && (iwl_debug_level & IWL_DL_TX)) {
+ ptr = priv->tx_traffic;
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "Tx Traffic idx: %u\n", priv->tx_traffic_idx);
+ for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) {
+ for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16;
+ entry++, ofs += 16) {
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "0x%.4x ", ofs);
+ hex_dump_to_buffer(ptr + ofs, 16, 16, 2,
+ buf + pos, bufsz - pos, 0);
+ pos += strlen(buf);
+ if (bufsz - pos > 0)
+ buf[pos++] = '\n';
+ }
+ }
+ }
+
+ pos += scnprintf(buf + pos, bufsz - pos, "Rx Queue\n");
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "read: %u, write: %u\n",
+ rxq->read, rxq->write);
+
+ if (priv->rx_traffic && (iwl_debug_level & IWL_DL_RX)) {
+ ptr = priv->rx_traffic;
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "Rx Traffic idx: %u\n", priv->rx_traffic_idx);
+ for (cnt = 0, ofs = 0; cnt < IWL_TRAFFIC_ENTRIES; cnt++) {
+ for (entry = 0; entry < IWL_TRAFFIC_ENTRY_SIZE / 16;
+ entry++, ofs += 16) {
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "0x%.4x ", ofs);
+ hex_dump_to_buffer(ptr + ofs, 16, 16, 2,
+ buf + pos, bufsz - pos, 0);
+ pos += strlen(buf);
+ if (bufsz - pos > 0)
+ buf[pos++] = '\n';
+ }
+ }
+ }
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+ kfree(buf);
+ return ret;
+}
+
+static ssize_t iwl_dbgfs_traffic_log_write(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct iwl_priv *priv = file->private_data;
+ char buf[8];
+ int buf_size;
+ int traffic_log;
+
+ memset(buf, 0, sizeof(buf));
+ buf_size = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+ if (sscanf(buf, "%d", &traffic_log) != 1)
+ return -EFAULT;
+ if (traffic_log == 0)
+ iwl_reset_traffic_log(priv);
+
+ return count;
+}
+
+DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
+
/*
* Create the debugfs files and directories
*
@@ -738,6 +836,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
+ DEBUGFS_ADD_DIR(debug, dbgfs->dir_drv);
DEBUGFS_ADD_FILE(nvm, data);
DEBUGFS_ADD_FILE(sram, data);
DEBUGFS_ADD_FILE(log_event, data);
@@ -753,6 +852,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
#endif
DEBUGFS_ADD_FILE(thermal_throttling, data);
DEBUGFS_ADD_FILE(disable_ht40, data);
+ DEBUGFS_ADD_FILE(traffic_log, debug);
DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
&priv->disable_chain_noise_cal);
@@ -794,6 +894,8 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_thermal_throttling);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_disable_ht40);
DEBUGFS_REMOVE(priv->dbgfs->dir_data);
+ DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_traffic_log);
+ DEBUGFS_REMOVE(priv->dbgfs->dir_debug);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
if (((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) ||
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 624656a2bba..899b75f28a2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -877,6 +877,8 @@ struct iwl_chain_noise_data {
#define EEPROM_SEM_TIMEOUT 10 /* milliseconds */
#define EEPROM_SEM_RETRY_LIMIT 1000 /* number of attempts (not time) */
+#define IWL_TRAFFIC_ENTRIES (256)
+#define IWL_TRAFFIC_ENTRY_SIZE (64)
enum {
MEASUREMENT_READY = (1 << 0),
@@ -1182,6 +1184,10 @@ struct iwl_priv {
bool disable_ht40;
#ifdef CONFIG_IWLWIFI_DEBUGFS
/* debugfs */
+ u16 tx_traffic_idx;
+ u16 rx_traffic_idx;
+ u8 *tx_traffic;
+ u8 *rx_traffic;
struct iwl_debugfs *dbgfs;
#endif /* CONFIG_IWLWIFI_DEBUGFS */
#endif /* CONFIG_IWLWIFI_DEBUG */
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 9e63f9d149e..55860037f98 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -1063,6 +1063,7 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX))
iwl_dbg_report_frame(priv, rx_start, len, header, 1);
#endif
+ iwl_dbg_log_rx_data_frame(priv, len, header);
IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, qual %d, TSF %llu\n",
rx_status.signal, rx_status.noise, rx_status.qual,
(unsigned long long)rx_status.mactime);
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 0cac06c43f9..c85e54cb31d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -808,6 +808,7 @@ int iwl_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
/* TODO need this for burst mode later on */
iwl_tx_cmd_build_basic(priv, tx_cmd, info, hdr, sta_id);
+ iwl_dbg_log_tx_data_frame(priv, len, hdr);
/* set is_hcca to 0; it probably will never be implemented */
iwl_tx_cmd_build_rate(priv, tx_cmd, info, fc, sta_id, 0);
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 0babce250ea..4f5a3d035b0 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -598,7 +598,7 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
len = (u16)skb->len;
tx->len = cpu_to_le16(len);
-
+ iwl_dbg_log_tx_data_frame(priv, len, hdr);
tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
@@ -3332,9 +3332,12 @@ static ssize_t store_debug_level(struct device *d,
ret = strict_strtoul(buf, 0, &val);
if (ret)
IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
- else
+ else {
priv->debug_level = val;
-
+ if (iwl_alloc_traffic_mem(priv))
+ IWL_ERR(priv,
+ "Not enough memory to generate traffic log\n");
+ }
return strnlen(buf, count);
}
@@ -3976,6 +3979,8 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
#ifdef CONFIG_IWLWIFI_DEBUG
atomic_set(&priv->restrict_refcnt, 0);
#endif
+ if (iwl_alloc_traffic_mem(priv))
+ IWL_ERR(priv, "Not enough memory to generate traffic log\n");
/***************************
* 2. Initializing PCI bus
@@ -4138,6 +4143,7 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
pci_disable_device(pdev);
out_ieee80211_free_hw:
ieee80211_free_hw(priv->hw);
+ iwl_free_traffic_mem(priv);
out:
return err;
}
@@ -4193,6 +4199,7 @@ static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
* until now... */
destroy_workqueue(priv->workqueue);
priv->workqueue = NULL;
+ iwl_free_traffic_mem(priv);
free_irq(pdev->irq, priv);
pci_disable_msi(pdev);