ath: Copy key cache management functions from ath9k to ath

Copied the key cache management functions from ath9k (common.c and hw.c) to
ath/key.c so we can use them from ath5k, later.

Minor changes have been made:
 - renamed ath9k_* to ath_*
 - replaced ah->caps.keycache_size with common->keymax
 - removed ATH9K_IS_MIC_ENABLED since it is always true.
 - the AR_PCU_MIC_NEW_LOC_ENA flag is replaced with (splitmic == 0).

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_ATH_COMMON)	+= ath.o
 
 ath-objs :=	main.o \
 		regd.o \
-		hw.o
+		hw.o \
+		key.o
 
 ath-$(CONFIG_ATH_DEBUG) += debug.o

drivers/net/wireless/ath/ath.h

@@ -80,6 +80,27 @@ enum ath_crypt_caps {
 	ATH_CRYPT_CAP_CIPHER_TKIP		= BIT(5),
 };
 
+struct ath_keyval {
+	u8 kv_type;
+	u8 kv_pad;
+	u16 kv_len;
+	u8 kv_val[16]; /* TK */
+	u8 kv_mic[8]; /* Michael MIC key */
+	u8 kv_txmic[8]; /* Michael MIC TX key (used only if the hardware
+			 * supports both MIC keys in the same key cache entry;
+			 * in that case, kv_mic is the RX key) */
+};
+
+enum ath_cipher {
+	ATH_CIPHER_WEP = 0,
+	ATH_CIPHER_AES_OCB = 1,
+	ATH_CIPHER_AES_CCM = 2,
+	ATH_CIPHER_CKIP = 3,
+	ATH_CIPHER_TKIP = 4,
+	ATH_CIPHER_CLR = 5,
+	ATH_CIPHER_MIC = 127
+};
+
 /**
  * struct ath_ops - Register read/write operations
  *
@@ -142,5 +163,11 @@ struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
 				gfp_t gfp_mask);
 
 void ath_hw_setbssidmask(struct ath_common *common);
+void ath_key_delete(struct ath_common *common, struct ieee80211_key_conf *key);
+int ath_key_config(struct ath_common *common,
+			  struct ieee80211_vif *vif,
+			  struct ieee80211_sta *sta,
+			  struct ieee80211_key_conf *key);
+bool ath_hw_keyreset(struct ath_common *common, u16 entry);
 
 #endif /* ATH_H */