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Commit f204b248 authored by Wey-Yi Guy's avatar Wey-Yi Guy Committed by John W. Linville
Browse files

iwlwifi: show current tx power 



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: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent fcbaf8b0

drivers/net/wireless/iwlwifi/iwl-debug.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

drivers/net/wireless/iwlwifi/iwl-debugfs.c

+54 −0
Original line number Diff line number Diff line
@@ -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);