iwlwifi: move more station managment into iwl-sta.c

This patch moves station management functions into iwl-sta.c (iwlcore).

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

1 files changed, 269 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index f2267047d102..c8e468fb3caa 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -117,6 +117,130 @@ int iwl_send_add_sta(struct iwl_priv *priv,
 }
 EXPORT_SYMBOL(iwl_send_add_sta);
 
+#ifdef CONFIG_IWL4965_HT
+
+static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
+                                   struct ieee80211_ht_info *sta_ht_inf)
+{
+        __le32 sta_flags;
+        u8 mimo_ps_mode;
+
+        if (!sta_ht_inf || !sta_ht_inf->ht_supported)
+                goto done;
+
+        mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
+
+        sta_flags = priv->stations[index].sta.station_flags;
+
+        sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
+
+        switch (mimo_ps_mode) {
+        case WLAN_HT_CAP_MIMO_PS_STATIC:
+                sta_flags |= STA_FLG_MIMO_DIS_MSK;
+                break;
+        case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
+                sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
+                break;
+        case WLAN_HT_CAP_MIMO_PS_DISABLED:
+                break;
+        default:
+                IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
+                break;
+        }
+
+        sta_flags |= cpu_to_le32(
+              (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
+
+        sta_flags |= cpu_to_le32(
+              (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
+
+        if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
+                sta_flags |= STA_FLG_FAT_EN_MSK;
+        else
+                sta_flags &= ~STA_FLG_FAT_EN_MSK;
+
+        priv->stations[index].sta.station_flags = sta_flags;
+ done:
+        return;
+}
+#else
+static inline void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
+                                        struct ieee80211_ht_info *sta_ht_info)
+{
+}
+#endif
+
+/**
+ * iwl_add_station_flags - Add station to tables in driver and device
+ */
+u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
+                         u8 flags, struct ieee80211_ht_info *ht_info)
+{
+        int i;
+        int index = IWL_INVALID_STATION;
+        struct iwl_station_entry *station;
+        unsigned long flags_spin;
+        DECLARE_MAC_BUF(mac);
+
+        spin_lock_irqsave(&priv->sta_lock, flags_spin);
+        if (is_ap)
+                index = IWL_AP_ID;
+        else if (is_broadcast_ether_addr(addr))
+                index = priv->hw_params.bcast_sta_id;
+        else
+                for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
+                        if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
+                                                addr)) {
+                                index = i;
+                                break;
+                        }
+
+                        if (!priv->stations[i].used &&
+                            index == IWL_INVALID_STATION)
+                                index = i;
+                }
+
+
+        /* These two conditions have the same outcome, but keep them separate
+          since they have different meanings */
+        if (unlikely(index == IWL_INVALID_STATION)) {
+                spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+                return index;
+        }
+
+        if (priv->stations[index].used &&
+            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
+                spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+                return index;
+        }
+
+
+        IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
+        station = &priv->stations[index];
+        station->used = 1;
+        priv->num_stations++;
+
+        /* Set up the REPLY_ADD_STA command to send to device */
+        memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
+        memcpy(station->sta.sta.addr, addr, ETH_ALEN);
+        station->sta.mode = 0;
+        station->sta.sta.sta_id = index;
+        station->sta.station_flags = 0;
+
+        /* BCAST station and IBSS stations do not work in HT mode */
+        if (index != priv->hw_params.bcast_sta_id &&
+            priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
+                iwl_set_ht_add_station(priv, index, ht_info);
+
+        spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+
+        /* Add station to device's station table */
+        iwl_send_add_sta(priv, &station->sta, flags);
+        return index;
+
+}
+EXPORT_SYMBOL(iwl_add_station_flags);
+
 int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
 {
         int i;
@@ -470,3 +594,148 @@ int iwl_send_lq_cmd(struct iwl_priv *priv,
 }
 EXPORT_SYMBOL(iwl_send_lq_cmd);
 
+/**
+ * iwl_sta_init_lq - Initialize a station's hardware rate table
+ *
+ * The uCode's station table contains a table of fallback rates
+ * for automatic fallback during transmission.
+ *
+ * NOTE: This sets up a default set of values.  These will be replaced later
+ *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
+ *       rc80211_simple.
+ *
+ * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
+ *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
+ *       which requires station table entry to exist).
+ */
+static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
+{
+        int i, r;
+        struct iwl_link_quality_cmd link_cmd = {
+                .reserved1 = 0,
+        };
+        u16 rate_flags;
+
+        /* Set up the rate scaling to start at selected rate, fall back
+         * all the way down to 1M in IEEE order, and then spin on 1M */
+        if (is_ap)
+                r = IWL_RATE_54M_INDEX;
+        else if (priv->band == IEEE80211_BAND_5GHZ)
+                r = IWL_RATE_6M_INDEX;
+        else
+                r = IWL_RATE_1M_INDEX;
+
+        for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
+                rate_flags = 0;
+                if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
+                        rate_flags |= RATE_MCS_CCK_MSK;
+
+                /* Use Tx antenna B only */
+                rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
+
+                link_cmd.rs_table[i].rate_n_flags =
+                        iwl4965_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
+                r = iwl4965_get_prev_ieee_rate(r);
+        }
+
+        link_cmd.general_params.single_stream_ant_msk = 2;
+        link_cmd.general_params.dual_stream_ant_msk = 3;
+        link_cmd.agg_params.agg_dis_start_th = 3;
+        link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
+
+        /* Update the rate scaling for control frame Tx to AP */
+        link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
+
+        iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
+                               sizeof(link_cmd), &link_cmd, NULL);
+}
+/**
+ * iwl_rxon_add_station - add station into station table.
+ *
+ * there is only one AP station with id= IWL_AP_ID
+ * NOTE: mutex must be held before calling this fnction
+ */
+int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
+{
+        u8 sta_id;
+
+        /* Add station to device's station table */
+#ifdef CONFIG_IWL4965_HT
+        struct ieee80211_conf *conf = &priv->hw->conf;
+        struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
+
+        if ((is_ap) &&
+            (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
+            (priv->iw_mode == IEEE80211_IF_TYPE_STA))
+                sta_id = iwl_add_station_flags(priv, addr, is_ap,
+                                                   0, cur_ht_config);
+        else
+#endif /* CONFIG_IWL4965_HT */
+                sta_id = iwl_add_station_flags(priv, addr, is_ap,
+                                                   0, NULL);
+
+        /* Set up default rate scaling table in device's station table */
+        iwl_sta_init_lq(priv, addr, is_ap);
+
+        return sta_id;
+}
+EXPORT_SYMBOL(iwl_rxon_add_station);
+
+
+/**
+ * iwl_get_sta_id - Find station's index within station table
+ *
+ * If new IBSS station, create new entry in station table
+ */
+int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
+{
+        int sta_id;
+        u16 fc = le16_to_cpu(hdr->frame_control);
+        DECLARE_MAC_BUF(mac);
+
+        /* If this frame is broadcast or management, use broadcast station id */
+        if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
+            is_multicast_ether_addr(hdr->addr1))
+                return priv->hw_params.bcast_sta_id;
+
+        switch (priv->iw_mode) {
+
+        /* If we are a client station in a BSS network, use the special
+         * AP station entry (that's the only station we communicate with) */
+        case IEEE80211_IF_TYPE_STA:
+                return IWL_AP_ID;
+
+        /* If we are an AP, then find the station, or use BCAST */
+        case IEEE80211_IF_TYPE_AP:
+                sta_id = iwl_find_station(priv, hdr->addr1);
+                if (sta_id != IWL_INVALID_STATION)
+                        return sta_id;
+                return priv->hw_params.bcast_sta_id;
+
+        /* If this frame is going out to an IBSS network, find the station,
+         * or create a new station table entry */
+        case IEEE80211_IF_TYPE_IBSS:
+                sta_id = iwl_find_station(priv, hdr->addr1);
+                if (sta_id != IWL_INVALID_STATION)
+                        return sta_id;
+
+                /* Create new station table entry */
+                sta_id = iwl_add_station_flags(priv, hdr->addr1,
+                                                   0, CMD_ASYNC, NULL);
+
+                if (sta_id != IWL_INVALID_STATION)
+                        return sta_id;
+
+                IWL_DEBUG_DROP("Station %s not in station map. "
+                               "Defaulting to broadcast...\n",
+                               print_mac(mac, hdr->addr1));
+                iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
+                return priv->hw_params.bcast_sta_id;
+
+        default:
+                IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
+                return priv->hw_params.bcast_sta_id;
+        }
+}
+EXPORT_SYMBOL(iwl_get_sta_id);
+