iwlwifi: rate scale module cleanups

This patch does following changes
1. rs_get_expected_tpt_table: changed get to set
2. changed IWL_DEBUG_HT to IWL_DEBUG_RATE as appropriate
3. changed rs_get_supported_rates to be returning value function

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

1 files changed, 49 insertions, 52 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index 7c55aa9a2ba9..4063534b64c8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -604,25 +604,23 @@ static inline u8 rs_use_green(struct iwl_priv *priv,
  * basic available rates.
  *
  */
-static void rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta,
+static u16 rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta,
                                    struct ieee80211_hdr *hdr,
-                                   enum iwl_table_type rate_type,
-                                   u16 *data_rate)
+                                   enum iwl_table_type rate_type)
 {
-        if (is_legacy(rate_type))
-                *data_rate = lq_sta->active_legacy_rate;
-        else {
+        if (hdr && is_multicast_ether_addr(hdr->addr1) &&
+            lq_sta->active_rate_basic)
+                return lq_sta->active_rate_basic;
+
+        if (is_legacy(rate_type)) {
+                return lq_sta->active_legacy_rate;
+        } else {
                 if (is_siso(rate_type))
-                        *data_rate = lq_sta->active_siso_rate;
+                        return lq_sta->active_siso_rate;
                 else if (is_mimo2(rate_type))
-                        *data_rate = lq_sta->active_mimo2_rate;
+                        return lq_sta->active_mimo2_rate;
                 else
-                        *data_rate = lq_sta->active_mimo3_rate;
-        }
-
-        if (hdr && is_multicast_ether_addr(hdr->addr1) &&
-            lq_sta->active_rate_basic) {
-                *data_rate = lq_sta->active_rate_basic;
+                        return lq_sta->active_mimo3_rate;
         }
 }
 
@@ -709,7 +707,7 @@ static u32 rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta,
                 tbl->is_SGI = 0;
         }
 
-        rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, &rate_mask);
+        rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
 
         /* Mask with station rate restriction */
         if (is_legacy(tbl->lq_type)) {
@@ -975,7 +973,7 @@ static u8 rs_is_other_ant_connected(u8 valid_antenna, u8 ant_type)
 static void rs_set_stay_in_table(u8 is_legacy,
                                  struct iwl4965_lq_sta *lq_sta)
 {
-        IWL_DEBUG_HT("we are staying in the same table\n");
+        IWL_DEBUG_RATE("we are staying in the same table\n");
         lq_sta->stay_in_tbl = 1;        /* only place this gets set */
         if (is_legacy) {
                 lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT;
@@ -994,7 +992,7 @@ static void rs_set_stay_in_table(u8 is_legacy,
 /*
  * Find correct throughput table for given mode of modulation
  */
-static void rs_get_expected_tpt_table(struct iwl4965_lq_sta *lq_sta,
+static void rs_set_expected_tpt_table(struct iwl4965_lq_sta *lq_sta,
                                       struct iwl4965_scale_tbl_info *tbl)
 {
         if (is_legacy(tbl->lq_type)) {
@@ -1161,7 +1159,7 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
         if (!rs_is_both_ant_supp(priv->hw_params.valid_tx_ant))
                 return -1;
 
-        IWL_DEBUG_HT("LQ: try to switch to MIMO2\n");
+        IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n");
 
         tbl->lq_type = LQ_MIMO2;
         tbl->is_dup = lq_sta->is_dup;
@@ -1186,20 +1184,20 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
                 tbl->is_SGI = 0;
         */
 
-        rs_get_expected_tpt_table(lq_sta, tbl);
+        rs_set_expected_tpt_table(lq_sta, tbl);
 
         rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index);
 
-        IWL_DEBUG_HT("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
+        IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
 
         if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
-                IWL_DEBUG_HT("Can't switch with index %d rate mask %x\n",
+                IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n",
                                                 rate, rate_mask);
                 return -1;
         }
         tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green);
 
-        IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
+        IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n",
                      tbl->current_rate, is_green);
         return 0;
 }
@@ -1232,7 +1230,7 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
             !sta->ht_info.ht_supported)
                 return -1;
 
-        IWL_DEBUG_HT("LQ: try to switch to SISO\n");
+        IWL_DEBUG_RATE("LQ: try to switch to SISO\n");
 
         tbl->is_dup = lq_sta->is_dup;
         tbl->lq_type = LQ_SISO;
@@ -1260,17 +1258,17 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
         if (is_green)
                 tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/
 
-        rs_get_expected_tpt_table(lq_sta, tbl);
+        rs_set_expected_tpt_table(lq_sta, tbl);
         rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index);
 
-        IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask);
+        IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask);
         if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
-                IWL_DEBUG_HT("can not switch with index %d rate mask %x\n",
+                IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n",
                              rate, rate_mask);
                 return -1;
         }
         tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green);
-        IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n",
+        IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n",
                      tbl->current_rate, is_green);
         return 0;
 #else
@@ -1302,7 +1300,7 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
         for (; ;) {
                 switch (tbl->action) {
                 case IWL_LEGACY_SWITCH_ANTENNA:
-                        IWL_DEBUG_HT("LQ Legacy toggle Antenna\n");
+                        IWL_DEBUG_RATE("LQ Legacy toggle Antenna\n");
 
                         search_tbl->lq_type = LQ_NONE;
                         lq_sta->action_counter++;
@@ -1322,12 +1320,12 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
 
                         rs_toggle_antenna(&search_tbl->current_rate,
                                            search_tbl);
-                        rs_get_expected_tpt_table(lq_sta, search_tbl);
+                        rs_set_expected_tpt_table(lq_sta, search_tbl);
                         lq_sta->search_better_tbl = 1;
                         goto out;
 
                 case IWL_LEGACY_SWITCH_SISO:
-                        IWL_DEBUG_HT("LQ: Legacy switch to SISO\n");
+                        IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n");
 
                         /* Set up search table to try SISO */
                         memcpy(search_tbl, tbl, sz);
@@ -1342,7 +1340,7 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
 
                         break;
                 case IWL_LEGACY_SWITCH_MIMO2:
-                        IWL_DEBUG_HT("LQ: Legacy switch to MIMO2\n");
+                        IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n");
 
                         /* Set up search table to try MIMO */
                         memcpy(search_tbl, tbl, sz);
@@ -1401,7 +1399,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
                 lq_sta->action_counter++;
                 switch (tbl->action) {
                 case IWL_SISO_SWITCH_ANTENNA:
-                        IWL_DEBUG_HT("LQ: SISO toggle Antenna\n");
+                        IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n");
                         /*FIXME:RS: is this really needed for SISO?*/
                         if (window->success_ratio >= IWL_RS_GOOD_RATIO)
                                 break;
@@ -1417,7 +1415,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
                         goto out;
 
                 case IWL_SISO_SWITCH_MIMO2:
-                        IWL_DEBUG_HT("LQ: SISO switch to MIMO\n");
+                        IWL_DEBUG_RATE("LQ: SISO switch to MIMO\n");
                         memcpy(search_tbl, tbl, sz);
                         search_tbl->is_SGI = 0;
                         search_tbl->ant_type = ANT_AB; /*FIXME:RS*/
@@ -1429,7 +1427,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
                         }
                         break;
                 case IWL_SISO_SWITCH_GI:
-                        IWL_DEBUG_HT("LQ: SISO toggle SGI/NGI\n");
+                        IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n");
 
                         memcpy(search_tbl, tbl, sz);
                         if (is_green) {
@@ -1439,7 +1437,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
                                         IWL_ERROR("SGI was set in GF+SISO\n");
                         }
                         search_tbl->is_SGI = !tbl->is_SGI;
-                        rs_get_expected_tpt_table(lq_sta, search_tbl);
+                        rs_set_expected_tpt_table(lq_sta, search_tbl);
                         if (tbl->is_SGI) {
                                 s32 tpt = lq_sta->last_tpt / 100;
                                 if (tpt >= search_tbl->expected_tpt[index])
@@ -1490,7 +1488,7 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
                 switch (tbl->action) {
                 case IWL_MIMO_SWITCH_ANTENNA_A:
                 case IWL_MIMO_SWITCH_ANTENNA_B:
-                        IWL_DEBUG_HT("LQ: MIMO2 switch to SISO\n");
+                        IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n");
 
                         /* Set up new search table for SISO */
                         memcpy(search_tbl, tbl, sz);
@@ -1510,12 +1508,12 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
                         break;
 
                 case IWL_MIMO_SWITCH_GI:
-                        IWL_DEBUG_HT("LQ: MIMO toggle SGI/NGI\n");
+                        IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n");
 
                         /* Set up new search table for MIMO */
                         memcpy(search_tbl, tbl, sz);
                         search_tbl->is_SGI = !tbl->is_SGI;
-                        rs_get_expected_tpt_table(lq_sta, search_tbl);
+                        rs_set_expected_tpt_table(lq_sta, search_tbl);
                         /*
                          * If active table already uses the fastest possible
                          * modulation (dual stream with short guard interval),
@@ -1593,7 +1591,7 @@ static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta)
                     (lq_sta->total_success > lq_sta->max_success_limit) ||
                     ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer)
                      && (flush_interval_passed))) {
-                        IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:",
+                        IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:",
                                      lq_sta->total_failed,
                                      lq_sta->total_success,
                                      flush_interval_passed);
@@ -1616,7 +1614,7 @@ static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta)
                             lq_sta->table_count_limit) {
                                 lq_sta->table_count = 0;
 
-                                IWL_DEBUG_HT("LQ: stay in table clear win\n");
+                                IWL_DEBUG_RATE("LQ: stay in table clear win\n");
                                 for (i = 0; i < IWL_RATE_COUNT; i++)
                                         rs_rate_scale_clear_window(
                                                 &(tbl->win[i]));
@@ -1715,8 +1713,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                        tbl->lq_type);
 
         /* rates available for this association, and for modulation mode */
-        rs_get_supported_rates(lq_sta, hdr, tbl->lq_type,
-                                &rate_mask);
+        rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
 
         IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask);
 
@@ -1756,7 +1753,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
 
         /* Get expected throughput table and history window for current rate */
         if (!tbl->expected_tpt)
-                rs_get_expected_tpt_table(lq_sta, tbl);
+                rs_set_expected_tpt_table(lq_sta, tbl);
 
         window = &(tbl->win[index]);
 
@@ -1806,7 +1803,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                 if ((window->success_ratio > success_limit) ||
                     (window->average_tpt > lq_sta->last_tpt)) {
                         if (!is_legacy(tbl->lq_type)) {
-                                IWL_DEBUG_HT("LQ: we are switching to HT"
+                                IWL_DEBUG_RATE("LQ: we are switching to HT"
                                              " rate suc %d current tpt %d"
                                              " old tpt %d\n",
                                              window->success_ratio,
@@ -1834,7 +1831,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
 
                         /* Need to set up a new rate table in uCode */
                         update_lq = 1;
-                        IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n");
+                        IWL_DEBUG_RATE("XXY GO BACK TO OLD TABLE\n");
                 }
 
                 /* Either way, we've made a decision; modulation mode
@@ -1942,7 +1939,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                 break;
         }
 
-        IWL_DEBUG_HT("choose rate scale index %d action %d low %d "
+        IWL_DEBUG_RATE("choose rate scale index %d action %d low %d "
                     "high %d type %d\n",
                      index, scale_action, low, high, tbl->lq_type);
 
@@ -1987,7 +1984,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                         index = iwl4965_hwrate_to_plcp_idx(
                                                         tbl->current_rate);
 
-                        IWL_DEBUG_HT("Switch current  mcs: %X index: %d\n",
+                        IWL_DEBUG_RATE("Switch current  mcs: %X index: %d\n",
                                      tbl->current_rate, index);
                         rs_fill_link_cmd(priv, lq_sta, tbl->current_rate,
                                          &lq_sta->lq);
@@ -2006,7 +2003,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
 #endif
                     (lq_sta->action_counter >= 1)) {
                         lq_sta->action_counter = 0;
-                        IWL_DEBUG_HT("LQ: STAY in legacy table\n");
+                        IWL_DEBUG_RATE("LQ: STAY in legacy table\n");
                         rs_set_stay_in_table(1, lq_sta);
                 }
 
@@ -2019,7 +2016,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                         if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
                             (lq_sta->tx_agg_tid_en & (1 << tid)) &&
                             (tid != MAX_TID_COUNT)) {
-                                IWL_DEBUG_HT("try to aggregate tid %d\n", tid);
+                                IWL_DEBUG_RATE("try to aggregate tid %d\n", tid);
                                 rs_tl_turn_on_agg(priv, tid, lq_sta, sta);
                         }
 #endif /*CONFIG_IWL4965_HT */
@@ -2103,7 +2100,7 @@ static void rs_initialize_lq(struct iwl_priv *priv,
 
         rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green);
         tbl->current_rate = rate;
-        rs_get_expected_tpt_table(lq_sta, tbl);
+        rs_set_expected_tpt_table(lq_sta, tbl);
         rs_fill_link_cmd(NULL, lq_sta, rate, &lq_sta->lq);
         iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
  out:
@@ -2227,7 +2224,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
                 DECLARE_MAC_BUF(mac);
 
                 /* for IBSS the call are from tasklet */
-                IWL_DEBUG_HT("LQ: ADD station %s\n",
+                IWL_DEBUG_RATE("LQ: ADD station %s\n",
                              print_mac(mac, sta->addr));
 
                 if (sta_id == IWL_INVALID_STATION) {
@@ -2287,7 +2284,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
         lq_sta->active_mimo3_rate &= ~((u16)0x2);
         lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE;
 
-        IWL_DEBUG_HT("SISO RATE %X MIMO2 RATE %X MIMO3 RATE %X\n",
+        IWL_DEBUG_RATE("SISO RATE %X MIMO2 RATE %X MIMO3 RATE %X\n",
                      lq_sta->active_siso_rate,
                      lq_sta->active_mimo2_rate,
                      lq_sta->active_mimo3_rate);