ath9k: Remove ath_rate_softc

Move the hw rate tables to ath_softc, and access them directly.
tx_triglevel_max is global, move it to ath_rate_node.
Now that ath_rate_softc is gone, rate control attach becomes simpler.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 41 insertions, 69 deletions

diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 0fa1b30bdcb6..59c146cdd0db 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -23,8 +23,6 @@
 /* FIXME: remove this include! */
 #include "../net/mac80211/rate.h"
 
-static u32 tx_triglevel_max;
-
 static struct ath_rate_table ar5416_11na_ratetable = {
         42,
         {
@@ -436,7 +434,7 @@ static inline int8_t median(int8_t a, int8_t b, int8_t c)
         }
 }
 
-static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table,
+static void ath_rc_sort_validrates(struct ath_rate_table *rate_table,
                                    struct ath_rate_node *ath_rc_priv)
 {
         u8 i, j, idx, idx_next;
@@ -481,7 +479,7 @@ static inline int ath_rc_isvalid_txmask(struct ath_rate_node *ath_rc_priv,
 
 /* Iterators for valid_txrate_mask */
 static inline int
-ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table,
+ath_rc_get_nextvalid_txrate(struct ath_rate_table *rate_table,
                             struct ath_rate_node *ath_rc_priv,
                             u8 cur_valid_txrate,
                             u8 *next_idx)
@@ -519,7 +517,7 @@ static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
 }
 
 static inline int
-ath_rc_get_nextlowervalid_txrate(const struct ath_rate_table *rate_table,
+ath_rc_get_nextlowervalid_txrate(struct ath_rate_table *rate_table,
                                  struct ath_rate_node *ath_rc_priv,
                                  u8 cur_valid_txrate, u8 *next_idx)
 {
@@ -539,7 +537,7 @@ ath_rc_get_nextlowervalid_txrate(const struct ath_rate_table *rate_table,
  */
 static u8
 ath_rc_sib_init_validrates(struct ath_rate_node *ath_rc_priv,
-                           const struct ath_rate_table *rate_table,
+                           struct ath_rate_table *rate_table,
                            u32 capflag)
 {
         u8 i, hi = 0;
@@ -572,7 +570,7 @@ ath_rc_sib_init_validrates(struct ath_rate_node *ath_rc_priv,
  */
 static u8
 ath_rc_sib_setvalid_rates(struct ath_rate_node *ath_rc_priv,
-                          const struct ath_rate_table *rate_table,
+                          struct ath_rate_table *rate_table,
                           struct ath_rateset *rateset,
                           u32 capflag)
 {
@@ -620,7 +618,7 @@ ath_rc_sib_setvalid_rates(struct ath_rate_node *ath_rc_priv,
 
 static u8
 ath_rc_sib_setvalid_htrates(struct ath_rate_node *ath_rc_priv,
-                            const struct ath_rate_table *rate_table,
+                            struct ath_rate_table *rate_table,
                             u8 *mcs_set, u32 capflag)
 {
         u8 i, j, hi = 0;
@@ -653,50 +651,13 @@ ath_rc_sib_setvalid_htrates(struct ath_rate_node *ath_rc_priv,
         return hi;
 }
 
-struct ath_rate_softc *ath_rate_attach(struct ath_softc *sc)
-{
-        struct ath_rate_softc *asc;
-
-        asc = kzalloc(sizeof(struct ath_rate_softc), GFP_KERNEL);
-        if (asc == NULL)
-                return NULL;
-
-        asc->hw_rate_table[ATH9K_MODE_11B] = &ar5416_11b_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11A] = &ar5416_11a_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11G] = &ar5416_11g_ratetable;
-
-        asc->hw_rate_table[ATH9K_MODE_11NA_HT20] = &ar5416_11na_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11NG_HT20] = &ar5416_11ng_ratetable;
-
-        asc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS] =
-                &ar5416_11na_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS] =
-                &ar5416_11na_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS] =
-                &ar5416_11ng_ratetable;
-        asc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] =
-                &ar5416_11ng_ratetable;
-
-        /* Save Maximum TX Trigger Level (used for 11n) */
-        tx_triglevel_max = sc->sc_ah->ah_caps.tx_triglevel_max;
-
-        return asc;
-}
-
-void ath_rate_detach(struct ath_rate_softc *asc)
-{
-        if (asc != NULL)
-                kfree(asc);
-}
-
 u8 ath_rate_findrateix(struct ath_softc *sc,
                        u8 dot11rate)
 {
-        const struct ath_rate_table *ratetable;
-        struct ath_rate_softc *rsc = sc->sc_rc;
+        struct ath_rate_table *ratetable;
         int i;
 
-        ratetable = rsc->hw_rate_table[sc->sc_curmode];
+        ratetable = sc->hw_rate_table[sc->sc_curmode];
 
         if (WARN_ON(!ratetable))
                 return 0;
@@ -711,7 +672,7 @@ u8 ath_rate_findrateix(struct ath_softc *sc,
 
 static u8 ath_rc_ratefind_ht(struct ath_softc *sc,
                              struct ath_rate_node *ath_rc_priv,
-                             const struct ath_rate_table *rate_table,
+                             struct ath_rate_table *rate_table,
                              int probe_allowed, int *is_probing,
                              int is_retry)
 {
@@ -843,7 +804,7 @@ static u8 ath_rc_ratefind_ht(struct ath_softc *sc,
         return rate;
 }
 
-static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table ,
+static void ath_rc_rate_set_series(struct ath_rate_table *rate_table ,
                                    struct ath_rc_series *series,
                                    u8 tries,
                                    u8 rix,
@@ -864,7 +825,7 @@ static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table ,
 
 static u8 ath_rc_rate_getidx(struct ath_softc *sc,
                              struct ath_rate_node *ath_rc_priv,
-                             const struct ath_rate_table *rate_table,
+                             struct ath_rate_table *rate_table,
                              u8 rix, u16 stepdown,
                              u16 min_rate)
 {
@@ -898,11 +859,9 @@ static void ath_rc_ratefind(struct ath_softc *sc,
                             int is_retry)
 {
         u8 try_per_rate = 0, i = 0, rix, nrix;
-        struct ath_rate_softc  *asc = (struct ath_rate_softc *)sc->sc_rc;
         struct ath_rate_table *rate_table;
 
-        rate_table =
-                (struct ath_rate_table *)asc->hw_rate_table[sc->sc_curmode];
+        rate_table = sc->hw_rate_table[sc->sc_curmode];
         rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table,
                                  (rcflag & ATH_RC_PROBE_ALLOWED) ? 1 : 0,
                                  is_probe, is_retry);
@@ -1003,10 +962,7 @@ static void ath_rc_update_ht(struct ath_softc *sc,
         u32 now_msec = jiffies_to_msecs(jiffies);
         int state_change = FALSE, rate, count;
         u8 last_per;
-        struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc;
-        struct ath_rate_table *rate_table =
-                (struct ath_rate_table *)asc->hw_rate_table[sc->sc_curmode];
-
+        struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode];
         static u32 nretry_to_per_lookup[10] = {
                 100 * 0 / 1,
                 100 * 1 / 4,
@@ -1330,15 +1286,13 @@ static void ath_rc_update(struct ath_softc *sc,
                           struct ath_tx_info_priv *info_priv, int final_ts_idx,
                           int xretries, int long_retry)
 {
-        struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc;
         struct ath_rate_table *rate_table;
         struct ath_rc_series rcs[4];
         u8 flags;
         u32 series = 0, rix;
 
         memcpy(rcs, info_priv->rcs, 4 * sizeof(rcs[0]));
-        rate_table = (struct ath_rate_table *)
-                asc->hw_rate_table[sc->sc_curmode];
+        rate_table = sc->hw_rate_table[sc->sc_curmode];
         ASSERT(rcs[0].tries != 0);
 
         /*
@@ -1432,7 +1386,7 @@ static void ath_rate_tx_complete(struct ath_softc *sc,
          */
         if (info_priv->tx.ts_flags &
                 (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) &&
-                ((sc->sc_ah->ah_txTrigLevel) >= tx_triglevel_max)) {
+                ((sc->sc_ah->ah_txTrigLevel) >= rc_priv->tx_triglevel_max)) {
                 tx_status = 1;
                 is_underrun = 1;
         }
@@ -1452,21 +1406,17 @@ static void ath_rc_init(struct ath_softc *sc,
                         struct ieee80211_sta *sta)
 {
         struct ath_rate_table *rate_table = NULL;
-        struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc;
         struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
         u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates;
         u8 i, j, k, hi = 0, hthi = 0;
 
-        rate_table = (struct ath_rate_table *)
-                asc->hw_rate_table[sc->sc_curmode];
+        rate_table = sc->hw_rate_table[sc->sc_curmode];
 
         if (sta->ht_cap.ht_supported) {
                 if (sband->band == IEEE80211_BAND_2GHZ)
-                        rate_table = (struct ath_rate_table *)
-                                asc->hw_rate_table[ATH9K_MODE_11NG_HT20];
+                        rate_table = sc->hw_rate_table[ATH9K_MODE_11NG_HT20];
                 else
-                        rate_table = (struct ath_rate_table *)
-                                asc->hw_rate_table[ATH9K_MODE_11NA_HT20];
+                        rate_table = sc->hw_rate_table[ATH9K_MODE_11NA_HT20];
 
                 ath_rc_priv->ht_cap = (WLAN_RC_HT_FLAG | WLAN_RC_DS_FLAG);
                 if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
@@ -1691,8 +1641,8 @@ static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp
                 return NULL;
         }
 
-        rate_priv->asc = sc->sc_rc;
         rate_priv->rssi_down_time = jiffies_to_msecs(jiffies);
+        rate_priv->tx_triglevel_max = sc->sc_ah->ah_caps.tx_triglevel_max;
 
         return rate_priv;
 }
@@ -1717,6 +1667,28 @@ static struct rate_control_ops ath_rate_ops = {
         .free_sta = ath_rate_free_sta,
 };
 
+void ath_rate_attach(struct ath_softc *sc)
+{
+        sc->hw_rate_table[ATH9K_MODE_11B] =
+                &ar5416_11b_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11A] =
+                &ar5416_11a_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11G] =
+                &ar5416_11g_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NA_HT20] =
+                &ar5416_11na_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NG_HT20] =
+                &ar5416_11ng_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS] =
+                &ar5416_11na_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS] =
+                &ar5416_11na_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS] =
+                &ar5416_11ng_ratetable;
+        sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] =
+                &ar5416_11ng_ratetable;
+}
+
 int ath_rate_control_register(void)
 {
         return ieee80211_rate_control_register(&ath_rate_ops);