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;
+}