aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/iwl-rx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-rx.c59
1 files changed, 16 insertions, 43 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index e2d9afba38a..f3f6ea49fdd 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -791,7 +791,7 @@ static inline void iwl_dbg_report_frame(struct iwl_priv *priv,
791 791
792static void iwl_add_radiotap(struct iwl_priv *priv, 792static void iwl_add_radiotap(struct iwl_priv *priv,
793 struct sk_buff *skb, 793 struct sk_buff *skb,
794 struct iwl4965_rx_phy_res *rx_start, 794 struct iwl_rx_phy_res *rx_start,
795 struct ieee80211_rx_status *stats, 795 struct ieee80211_rx_status *stats,
796 u32 ampdu_status) 796 u32 ampdu_status)
797{ 797{
@@ -1010,8 +1010,8 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
1010 struct ieee80211_rx_status *stats) 1010 struct ieee80211_rx_status *stats)
1011{ 1011{
1012 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; 1012 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1013 struct iwl4965_rx_phy_res *rx_start = (include_phy) ? 1013 struct iwl_rx_phy_res *rx_start = (include_phy) ?
1014 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL; 1014 (struct iwl_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
1015 struct ieee80211_hdr *hdr; 1015 struct ieee80211_hdr *hdr;
1016 u16 len; 1016 u16 len;
1017 __le32 *rx_end; 1017 __le32 *rx_end;
@@ -1020,7 +1020,7 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
1020 u32 ampdu_status_legacy; 1020 u32 ampdu_status_legacy;
1021 1021
1022 if (!include_phy && priv->last_phy_res[0]) 1022 if (!include_phy && priv->last_phy_res[0])
1023 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; 1023 rx_start = (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
1024 1024
1025 if (!rx_start) { 1025 if (!rx_start) {
1026 IWL_ERROR("MPDU frame without a PHY data\n"); 1026 IWL_ERROR("MPDU frame without a PHY data\n");
@@ -1032,8 +1032,8 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
1032 1032
1033 len = le16_to_cpu(rx_start->byte_count); 1033 len = le16_to_cpu(rx_start->byte_count);
1034 1034
1035 rx_end = (__le32 *) ((u8 *) &pkt->u.raw[0] + 1035 rx_end = (__le32 *)((u8 *) &pkt->u.raw[0] +
1036 sizeof(struct iwl4965_rx_phy_res) + 1036 sizeof(struct iwl_rx_phy_res) +
1037 rx_start->cfg_phy_cnt + len); 1037 rx_start->cfg_phy_cnt + len);
1038 1038
1039 } else { 1039 } else {
@@ -1084,40 +1084,13 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv,
1084} 1084}
1085 1085
1086/* Calc max signal level (dBm) among 3 possible receivers */ 1086/* Calc max signal level (dBm) among 3 possible receivers */
1087static int iwl_calc_rssi(struct iwl_priv *priv, 1087static inline int iwl_calc_rssi(struct iwl_priv *priv,
1088 struct iwl4965_rx_phy_res *rx_resp) 1088 struct iwl_rx_phy_res *rx_resp)
1089{ 1089{
1090 /* data from PHY/DSP regarding signal strength, etc., 1090 return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
1091 * contents are always there, not configurable by host. */
1092 struct iwl4965_rx_non_cfg_phy *ncphy =
1093 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
1094 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
1095 >> IWL_AGC_DB_POS;
1096
1097 u32 valid_antennae =
1098 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
1099 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
1100 u8 max_rssi = 0;
1101 u32 i;
1102
1103 /* Find max rssi among 3 possible receivers.
1104 * These values are measured by the digital signal processor (DSP).
1105 * They should stay fairly constant even as the signal strength varies,
1106 * if the radio's automatic gain control (AGC) is working right.
1107 * AGC value (see below) will provide the "interesting" info. */
1108 for (i = 0; i < 3; i++)
1109 if (valid_antennae & (1 << i))
1110 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
1111
1112 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
1113 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
1114 max_rssi, agc);
1115
1116 /* dBm = max_rssi dB - agc dB - constant.
1117 * Higher AGC (higher radio gain) means lower signal. */
1118 return max_rssi - agc - IWL_RSSI_OFFSET;
1119} 1091}
1120 1092
1093
1121static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1094static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1122{ 1095{
1123 unsigned long flags; 1096 unsigned long flags;
@@ -1180,9 +1153,9 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
1180 * this rx packet for legacy frames, 1153 * this rx packet for legacy frames,
1181 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */ 1154 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
1182 int include_phy = (pkt->hdr.cmd == REPLY_RX); 1155 int include_phy = (pkt->hdr.cmd == REPLY_RX);
1183 struct iwl4965_rx_phy_res *rx_start = (include_phy) ? 1156 struct iwl_rx_phy_res *rx_start = (include_phy) ?
1184 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : 1157 (struct iwl_rx_phy_res *)&(pkt->u.raw[0]) :
1185 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; 1158 (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
1186 __le32 *rx_end; 1159 __le32 *rx_end;
1187 unsigned int len = 0; 1160 unsigned int len = 0;
1188 u16 fc; 1161 u16 fc;
@@ -1210,7 +1183,7 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
1210 1183
1211 if (!include_phy) { 1184 if (!include_phy) {
1212 if (priv->last_phy_res[0]) 1185 if (priv->last_phy_res[0])
1213 rx_start = (struct iwl4965_rx_phy_res *) 1186 rx_start = (struct iwl_rx_phy_res *)
1214 &priv->last_phy_res[1]; 1187 &priv->last_phy_res[1];
1215 else 1188 else
1216 rx_start = NULL; 1189 rx_start = NULL;
@@ -1227,7 +1200,7 @@ void iwl_rx_reply_rx(struct iwl_priv *priv,
1227 1200
1228 len = le16_to_cpu(rx_start->byte_count); 1201 len = le16_to_cpu(rx_start->byte_count);
1229 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt + 1202 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
1230 sizeof(struct iwl4965_rx_phy_res) + len); 1203 sizeof(struct iwl_rx_phy_res) + len);
1231 } else { 1204 } else {
1232 struct iwl4965_rx_mpdu_res_start *amsdu = 1205 struct iwl4965_rx_mpdu_res_start *amsdu =
1233 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; 1206 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
@@ -1316,6 +1289,6 @@ void iwl_rx_reply_rx_phy(struct iwl_priv *priv,
1316 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; 1289 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1317 priv->last_phy_res[0] = 1; 1290 priv->last_phy_res[0] = 1;
1318 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]), 1291 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
1319 sizeof(struct iwl4965_rx_phy_res)); 1292 sizeof(struct iwl_rx_phy_res));
1320} 1293}
1321EXPORT_SYMBOL(iwl_rx_reply_rx_phy); 1294EXPORT_SYMBOL(iwl_rx_reply_rx_phy);