iwlwifi: Add TX/RX statistcs to driver

This patch supports collecting of TX and RX statistics in the driver.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 24 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 7b0ad728f927..b2ea4d4f3f31 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -3337,6 +3337,14 @@ static void iwl4965_add_radiotap(struct iwl_priv *priv,
         stats->flag |= RX_FLAG_RADIOTAP;
 }
 
+static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
+{
+        /* 0 - mgmt, 1 - cnt, 2 - data */
+        int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
+        priv->rx_stats[idx].cnt++;
+        priv->rx_stats[idx].bytes += len;
+}
+
 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
                                        int include_phy,
                                        struct iwl4965_rx_mem_buffer *rxb,
@@ -3406,6 +3414,7 @@ static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
         if (priv->add_radiotap)
                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
 
+        iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
         priv->alloc_rxb_skb--;
         rxb->skb = NULL;
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.h b/drivers/net/wireless/iwlwifi/iwl-4965.h
index 60353b2645d4..aded6010ce20 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.h
@@ -1107,6 +1107,12 @@ struct iwl_priv {
         int last_rx_rssi;       /* From Rx packet statisitics */
         int last_rx_noise;      /* From beacon statistics */
 
+        /* counts mgmt, ctl, and data packets */
+        struct traffic_stats {
+                u32 cnt;
+                u64 bytes;
+        } tx_stats[3], rx_stats[3];
+
         struct iwl4965_power_mgr power_data;
 
         struct iwl4965_notif_statistics statistics;
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 4e899ce81b32..4f6ed6942065 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -2529,7 +2529,13 @@ static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
         cmd->cmd.tx.tx_flags = tx_flags;
         cmd->cmd.tx.next_frame_len = 0;
 }
-
+static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
+{
+        /* 0 - mgmt, 1 - cnt, 2 - data */
+        int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
+        priv->tx_stats[idx].cnt++;
+        priv->tx_stats[idx].bytes += len;
+}
 /**
  * iwl4965_get_sta_id - Find station's index within station table
  *
@@ -2776,6 +2782,8 @@ static int iwl4965_tx_skb(struct iwl_priv *priv,
         /* set is_hcca to 0; it probably will never be implemented */
         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
 
+        iwl_update_tx_stats(priv, fc, len);
+
         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
                 offsetof(struct iwl4965_tx_cmd, scratch);
         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);