From: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-debug.h | 1 +
drivers/net/wireless/iwlwifi/iwl-debugfs.c | 54 ++++++++++++++++++++++++++++
2 files changed, 55 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 723f38a..cbc6290 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -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;
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index f68fb47..fb84485 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -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);
--
1.5.6.3
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