iwlagn: keep track of failure tx status

Tx command response sent to host by uCode after completed
the transmission attempt. The status parameter indicates
whether the transmission was successful, or else why if failed.

Here we keep the counters to help understand the different failure
cases.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
index d706b8afbe5a..de68dde4feee 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-debugfs.c
@@ -1011,3 +1011,100 @@ ssize_t iwl_ucode_bt_stats_read(struct file *file,
 	kfree(buf);
 	return ret;
 }
+
+ssize_t iwl_reply_tx_error_read(struct file *file,
+				char __user *user_buf,
+				size_t count, loff_t *ppos)
+{
+	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+	int pos = 0;
+	char *buf;
+	int bufsz = (sizeof(struct reply_tx_error_statistics) * 24) + 200;
+	ssize_t ret;
+
+	if (!iwl_is_alive(priv))
+		return -EAGAIN;
+
+	buf = kzalloc(bufsz, GFP_KERNEL);
+	if (!buf) {
+		IWL_ERR(priv, "Can not allocate Buffer\n");
+		return -ENOMEM;
+	}
+
+	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_TX_Error:\n");
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_POSTPONE_DELAY),
+			 priv->_agn.reply_tx_stats.pp_delay);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_POSTPONE_FEW_BYTES),
+			 priv->_agn.reply_tx_stats.pp_few_bytes);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_POSTPONE_BT_PRIO),
+			 priv->_agn.reply_tx_stats.pp_bt_prio);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_POSTPONE_QUIET_PERIOD),
+			 priv->_agn.reply_tx_stats.pp_quiet_period);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_POSTPONE_CALC_TTAK),
+			 priv->_agn.reply_tx_stats.pp_calc_ttak);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t%u\n",
+			 iwl_get_tx_fail_reason(
+				TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY),
+			 priv->_agn.reply_tx_stats.int_crossed_retry);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_SHORT_LIMIT),
+			 priv->_agn.reply_tx_stats.short_limit);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_LONG_LIMIT),
+			 priv->_agn.reply_tx_stats.long_limit);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_FIFO_UNDERRUN),
+			 priv->_agn.reply_tx_stats.fifo_underrun);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_DRAIN_FLOW),
+			 priv->_agn.reply_tx_stats.drain_flow);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_RFKILL_FLUSH),
+			 priv->_agn.reply_tx_stats.rfkill_flush);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_LIFE_EXPIRE),
+			 priv->_agn.reply_tx_stats.life_expire);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_DEST_PS),
+			 priv->_agn.reply_tx_stats.dest_ps);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_HOST_ABORTED),
+			 priv->_agn.reply_tx_stats.host_abort);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_BT_RETRY),
+			 priv->_agn.reply_tx_stats.pp_delay);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_STA_INVALID),
+			 priv->_agn.reply_tx_stats.sta_invalid);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_FRAG_DROPPED),
+			 priv->_agn.reply_tx_stats.frag_drop);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_TID_DISABLE),
+			 priv->_agn.reply_tx_stats.tid_disable);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_FIFO_FLUSHED),
+			 priv->_agn.reply_tx_stats.fifo_flush);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t%u\n",
+			 iwl_get_tx_fail_reason(
+				TX_STATUS_FAIL_INSUFFICIENT_CF_POLL),
+			 priv->_agn.reply_tx_stats.insuff_cf_poll);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t\t\t%u\n",
+			 iwl_get_tx_fail_reason(TX_STATUS_FAIL_FW_DROP),
+			 priv->_agn.reply_tx_stats.fail_hw_drop);
+	pos += scnprintf(buf + pos, bufsz - pos, "%s:\t%u\n",
+			 iwl_get_tx_fail_reason(
+				TX_STATUS_FAIL_STA_COLOR_MISMATCH_DROP),
+			 priv->_agn.reply_tx_stats.sta_color_mismatch);
+	pos += scnprintf(buf + pos, bufsz - pos, "UNKNOWN:\t\t\t%u\n",
+			 priv->_agn.reply_tx_stats.unknown);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}