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iwlwifi: show current tx power

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debugFs file show current tx power for all the transmit chains

Adding "tx_power" file in /sys/kernal/debug/ieee80211/phy0/iwlagn/debug
to display current tx power for all the active chains in 1/2 dB step.

Show tx power information "Not available" if uCode can not provide the
information or interface is down.

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 2009-08-21 13:34:19 -07:00 committed by John W. Linville
parent fcbaf8b06d
commit f204b2487e
2 changed files with 55 additions and 0 deletions
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1
drivers/net/wireless/iwlwifi/iwl-debug.h
View File

@ -107,6 +107,7 @@ struct iwl_debugfs {
struct dentry *file_ucode_general_stats;
struct dentry *file_sensitivity;
struct dentry *file_chain_noise;
struct dentry *file_tx_power;
} dbgfs_debug_files;
u32 sram_offset;
u32 sram_len;

54
drivers/net/wireless/iwlwifi/iwl-debugfs.c
View File

@ -1563,6 +1563,57 @@ static ssize_t iwl_dbgfs_chain_noise_read(struct file *file,
return ret;
}
static ssize_t iwl_dbgfs_tx_power_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos) {
struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
char buf[128];
int pos = 0;
ssize_t ret;
const size_t bufsz = sizeof(buf);
struct statistics_tx *tx;
if (!iwl_is_alive(priv))
pos += scnprintf(buf + pos, bufsz - pos, "N/A\n");
else {
/* make request to uCode to retrieve statistics information */
mutex_lock(&priv->mutex);
ret = iwl_send_statistics_request(priv, 0);
mutex_unlock(&priv->mutex);
if (ret) {
IWL_ERR(priv, "Error sending statistics request: %zd\n",
ret);
return -EAGAIN;
}
tx = &priv->statistics.tx;
if (tx->tx_power.ant_a ||
tx->tx_power.ant_b ||
tx->tx_power.ant_c) {
pos += scnprintf(buf + pos, bufsz - pos,
"tx power: (1/2 dB step)\n");
if ((priv->cfg->valid_tx_ant & ANT_A) &&
tx->tx_power.ant_a)
pos += scnprintf(buf + pos, bufsz - pos,
"\tantenna A: 0x%X\n",
tx->tx_power.ant_a);
if ((priv->cfg->valid_tx_ant & ANT_B) &&
tx->tx_power.ant_b)
pos += scnprintf(buf + pos, bufsz - pos,
"\tantenna B: 0x%X\n",
tx->tx_power.ant_b);
if ((priv->cfg->valid_tx_ant & ANT_C) &&
tx->tx_power.ant_c)
pos += scnprintf(buf + pos, bufsz - pos,
"\tantenna C: 0x%X\n",
tx->tx_power.ant_c);
} else
pos += scnprintf(buf + pos, bufsz - pos, "N/A\n");
}
return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
}
DEBUGFS_READ_WRITE_FILE_OPS(rx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(tx_statistics);
DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@ -1573,6 +1624,7 @@ DEBUGFS_READ_FILE_OPS(ucode_tx_stats);
DEBUGFS_READ_FILE_OPS(ucode_general_stats);
DEBUGFS_READ_FILE_OPS(sensitivity);
DEBUGFS_READ_FILE_OPS(chain_noise);
DEBUGFS_READ_FILE_OPS(tx_power);
/*
* Create the debugfs files and directories
@ -1621,6 +1673,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
DEBUGFS_ADD_FILE(traffic_log, debug);
DEBUGFS_ADD_FILE(rx_queue, debug);
DEBUGFS_ADD_FILE(tx_queue, debug);
DEBUGFS_ADD_FILE(tx_power, debug);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
DEBUGFS_ADD_FILE(ucode_rx_stats, debug);
DEBUGFS_ADD_FILE(ucode_tx_stats, debug);
@ -1674,6 +1727,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_traffic_log);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_queue);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_power);
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
file_ucode_rx_stats);