iwlagn: add bluetooth stats to debugfs

For WiFi/BT combo devices, add bluetooth statistics counter
read function to debugfs.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-1000.c

@@ -222,6 +222,7 @@ static struct iwl_lib_ops iwl1000_lib = {
 		.rx_stats_read = iwl_ucode_rx_stats_read,
 		.tx_stats_read = iwl_ucode_tx_stats_read,
 		.general_stats_read = iwl_ucode_general_stats_read,
+		.bt_stats_read = iwl_ucode_bt_stats_read,
 	},
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -2285,6 +2285,7 @@ static struct iwl_lib_ops iwl4965_lib = {
 		.rx_stats_read = iwl_ucode_rx_stats_read,
 		.tx_stats_read = iwl_ucode_tx_stats_read,
 		.general_stats_read = iwl_ucode_general_stats_read,
+		.bt_stats_read = iwl_ucode_bt_stats_read,
 	},
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -398,6 +398,7 @@ static struct iwl_lib_ops iwl5000_lib = {
 		.rx_stats_read = iwl_ucode_rx_stats_read,
 		.tx_stats_read = iwl_ucode_tx_stats_read,
 		.general_stats_read = iwl_ucode_general_stats_read,
+		.bt_stats_read = iwl_ucode_bt_stats_read,
 	},
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,

drivers/net/wireless/iwlwifi/iwl-6000.c

@@ -323,6 +323,7 @@ static struct iwl_lib_ops iwl6000_lib = {
 		.rx_stats_read = iwl_ucode_rx_stats_read,
 		.tx_stats_read = iwl_ucode_tx_stats_read,
 		.general_stats_read = iwl_ucode_general_stats_read,
+		.bt_stats_read = iwl_ucode_bt_stats_read,
 	},
 	.recover_from_tx_stall = iwl_bg_monitor_recover,
 	.check_plcp_health = iwl_good_plcp_health,

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

@@ -924,3 +924,90 @@ ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user_buf,
 	kfree(buf);
 	return ret;
 }
+
+ssize_t iwl_ucode_bt_stats_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 statistics_bt_activity) * 24) + 200;
+	ssize_t ret;
+	struct statistics_bt_activity *bt, *accum_bt;
+
+	if (!iwl_is_alive(priv))
+		return -EAGAIN;
+
+	/* make request to uCode to retrieve statistics information */
+	mutex_lock(&priv->mutex);
+	ret = iwl_send_statistics_request(priv, CMD_SYNC, false);
+	mutex_unlock(&priv->mutex);
+
+	if (ret) {
+		IWL_ERR(priv,
+			"Error sending statistics request: %zd\n", ret);
+		return -EAGAIN;
+	}
+	buf = kzalloc(bufsz, GFP_KERNEL);
+	if (!buf) {
+		IWL_ERR(priv, "Can not allocate Buffer\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * the statistic information display here is based on
+	 * the last statistics notification from uCode
+	 * might not reflect the current uCode activity
+	 */
+	bt = &priv->_agn.statistics_bt.general.activity;
+	accum_bt = &priv->_agn.accum_statistics_bt.general.activity;
+
+	pos += iwl_statistics_flag(priv, buf, bufsz);
+	pos += scnprintf(buf + pos, bufsz - pos, "Statistics_BT:\n");
+	pos += scnprintf(buf + pos, bufsz - pos,
+			"\t\t\tcurrent\t\t\taccumulative\n");
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "hi_priority_tx_req_cnt:\t\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->hi_priority_tx_req_cnt),
+			 accum_bt->hi_priority_tx_req_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "hi_priority_tx_denied_cnt:\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->hi_priority_tx_denied_cnt),
+			 accum_bt->hi_priority_tx_denied_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "lo_priority_tx_req_cnt:\t\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->lo_priority_tx_req_cnt),
+			 accum_bt->lo_priority_tx_req_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "lo_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->lo_priority_tx_denied_cnt),
+			 accum_bt->lo_priority_tx_denied_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "hi_priority_rx_req_cnt:\t\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->hi_priority_rx_req_cnt),
+			 accum_bt->hi_priority_rx_req_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "hi_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->hi_priority_rx_denied_cnt),
+			 accum_bt->hi_priority_rx_denied_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "lo_priority_rx_req_cnt:\t\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->lo_priority_rx_req_cnt),
+			 accum_bt->lo_priority_rx_req_cnt);
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "lo_priority_rx_denied_cnt:\t%u\t\t\t%u\n",
+			 le32_to_cpu(bt->lo_priority_rx_denied_cnt),
+			 accum_bt->lo_priority_rx_denied_cnt);
+
+	pos += scnprintf(buf + pos, bufsz - pos,
+			 "(rx)num_bt_kills:\t\t%u\t\t\t%u\n",
+			 le32_to_cpu(priv->_agn.statistics_bt.rx.
+				general.num_bt_kills),
+			 priv->_agn.accum_statistics_bt.rx.
+				general.num_bt_kills);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+	kfree(buf);
+	return ret;
+}

drivers/net/wireless/iwlwifi/iwl-agn-debugfs.h

@@ -37,6 +37,8 @@ ssize_t iwl_ucode_tx_stats_read(struct file *file, char __user *user_buf,
 				size_t count, loff_t *ppos);
 ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user_buf,
 				     size_t count, loff_t *ppos);
+ssize_t iwl_ucode_bt_stats_read(struct file *file, char __user *user_buf,
+				size_t count, loff_t *ppos);
 #else
 static ssize_t iwl_ucode_rx_stats_read(struct file *file, char __user *user_buf,
 				       size_t count, loff_t *ppos)
@@ -53,4 +55,9 @@ static ssize_t iwl_ucode_general_stats_read(struct file *file, char __user *user
 {
 	return 0;
 }
+static ssize_t iwl_ucode_bt_stats_read(struct file *file, char __user *user_buf,
+				       size_t count, loff_t *ppos)
+{
+	return 0;
+}
 #endif

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

@@ -125,6 +125,8 @@ struct iwl_debugfs_ops {
 				 size_t count, loff_t *ppos);
 	ssize_t (*general_stats_read)(struct file *file, char __user *user_buf,
 				      size_t count, loff_t *ppos);
+	ssize_t (*bt_stats_read)(struct file *file, char __user *user_buf,
+				 size_t count, loff_t *ppos);
 };
 
 struct iwl_temp_ops {

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

@@ -1519,6 +1519,16 @@ static ssize_t iwl_dbgfs_txfifo_flush_write(struct file *file,
 	return count;
 }
 
+static ssize_t iwl_dbgfs_ucode_bt_stats_read(struct file *file,
+					char __user *user_buf,
+					size_t count, loff_t *ppos)
+{
+	struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+
+	return priv->cfg->ops->lib->debugfs_ops.bt_stats_read(file,
+			user_buf, count, ppos);
+}
+
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1541,6 +1551,7 @@ DEBUGFS_READ_WRITE_FILE_OPS(force_reset);
 DEBUGFS_READ_FILE_OPS(rxon_flags);
 DEBUGFS_READ_FILE_OPS(rxon_filter_flags);
 DEBUGFS_WRITE_FILE_OPS(txfifo_flush);
+DEBUGFS_READ_FILE_OPS(ucode_bt_stats);
 
 /*
  * Create the debugfs files and directories
@@ -1608,6 +1619,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 		DEBUGFS_ADD_FILE(chain_noise, dir_debug, S_IRUSR);
 	if (priv->cfg->ucode_tracing)
 		DEBUGFS_ADD_FILE(ucode_tracing, dir_debug, S_IWUSR | S_IRUSR);
+	if (priv->cfg->bt_statistics)
+		DEBUGFS_ADD_FILE(ucode_bt_stats, dir_debug, S_IRUSR);
 	DEBUGFS_ADD_FILE(rxon_flags, dir_debug, S_IWUSR);
 	DEBUGFS_ADD_FILE(rxon_filter_flags, dir_debug, S_IWUSR);
 	if (priv->cfg->sensitivity_calib_by_driver)