}
-
-/*********************\
-* Key table functions *
-\*********************/
-
-/*
- * Reset a key entry on the table
- */
-int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
-{
- unsigned int i, type;
- u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
-
- AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
-
- type = ath5k_hw_reg_read(ah, AR5K_KEYTABLE_TYPE(entry));
-
- for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
- ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
-
- /* Reset associated MIC entry if TKIP
- * is enabled located at offset (entry + 64) */
- if (type == AR5K_KEYTABLE_TYPE_TKIP) {
- AR5K_ASSERT_ENTRY(micentry, AR5K_KEYTABLE_SIZE);
- for (i = 0; i < AR5K_KEYCACHE_SIZE / 2 ; i++)
- ath5k_hw_reg_write(ah, 0,
- AR5K_KEYTABLE_OFF(micentry, i));
- }
-
- /*
- * Set NULL encryption on AR5212+
- *
- * Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
- * AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
- *
- * Note2: Windows driver (ndiswrapper) sets this to
- * 0x00000714 instead of 0x00000007
- */
- if (ah->ah_version >= AR5K_AR5211) {
- ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
- AR5K_KEYTABLE_TYPE(entry));
-
- if (type == AR5K_KEYTABLE_TYPE_TKIP) {
- ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
- AR5K_KEYTABLE_TYPE(micentry));
- }
- }
-
- return 0;
-}
-
-static
-int ath5k_keycache_type(const struct ieee80211_key_conf *key)
-{
- switch (key->cipher) {
- case WLAN_CIPHER_SUITE_TKIP:
- return AR5K_KEYTABLE_TYPE_TKIP;
- case WLAN_CIPHER_SUITE_CCMP:
- return AR5K_KEYTABLE_TYPE_CCM;
- case WLAN_CIPHER_SUITE_WEP40:
- return AR5K_KEYTABLE_TYPE_40;
- case WLAN_CIPHER_SUITE_WEP104:
- return AR5K_KEYTABLE_TYPE_104;
- default:
- return -EINVAL;
- }
-}
-
-/*
- * Set a key entry on the table
- */
-int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
- const struct ieee80211_key_conf *key, const u8 *mac)
-{
- unsigned int i;
- int keylen;
- __le32 key_v[5] = {};
- __le32 key0 = 0, key1 = 0;
- __le32 *rxmic, *txmic;
- int keytype;
- u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
- bool is_tkip;
- const u8 *key_ptr;
-
- is_tkip = (key->cipher == WLAN_CIPHER_SUITE_TKIP);
-
- /*
- * key->keylen comes in from mac80211 in bytes.
- * TKIP is 128 bit + 128 bit mic
- */
- keylen = (is_tkip) ? (128 / 8) : key->keylen;
-
- if (entry > AR5K_KEYTABLE_SIZE ||
- (is_tkip && micentry > AR5K_KEYTABLE_SIZE))
- return -EOPNOTSUPP;
-
- if (unlikely(keylen > 16))
- return -EOPNOTSUPP;
-
- keytype = ath5k_keycache_type(key);
- if (keytype < 0)
- return keytype;
-
- /*
- * each key block is 6 bytes wide, written as pairs of
- * alternating 32 and 16 bit le values.
- */
- key_ptr = key->key;
- for (i = 0; keylen >= 6; keylen -= 6) {
- memcpy(&key_v[i], key_ptr, 6);
- i += 2;
- key_ptr += 6;
- }
- if (keylen)
- memcpy(&key_v[i], key_ptr, keylen);
-
- /* intentionally corrupt key until mic is installed */
- if (is_tkip) {
- key0 = key_v[0] = ~key_v[0];
- key1 = key_v[1] = ~key_v[1];
- }
-
- for (i = 0; i < ARRAY_SIZE(key_v); i++)
- ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
- AR5K_KEYTABLE_OFF(entry, i));
-
- ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
-
- if (is_tkip) {
- /* Install rx/tx MIC */
- rxmic = (__le32 *) &key->key[16];
- txmic = (__le32 *) &key->key[24];
-
- if (ah->ah_combined_mic) {
- key_v[0] = rxmic[0];
- key_v[1] = cpu_to_le32(le32_to_cpu(txmic[0]) >> 16);
- key_v[2] = rxmic[1];
- key_v[3] = cpu_to_le32(le32_to_cpu(txmic[0]) & 0xffff);
- key_v[4] = txmic[1];
- } else {
- key_v[0] = rxmic[0];
- key_v[1] = 0;
- key_v[2] = rxmic[1];
- key_v[3] = 0;
- key_v[4] = 0;
- }
- for (i = 0; i < ARRAY_SIZE(key_v); i++)
- ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
- AR5K_KEYTABLE_OFF(micentry, i));
-
- ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
- AR5K_KEYTABLE_TYPE(micentry));
- ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC0(micentry));
- ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC1(micentry));
-
- /* restore first 2 words of key */
- ath5k_hw_reg_write(ah, le32_to_cpu(~key0),
- AR5K_KEYTABLE_OFF(entry, 0));
- ath5k_hw_reg_write(ah, le32_to_cpu(~key1),
- AR5K_KEYTABLE_OFF(entry, 1));
- }
-
- return ath5k_hw_set_key_lladdr(ah, entry, mac);
-}
-
-int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac)
-{
- u32 low_id, high_id;
-
- /* Invalid entry (key table overflow) */
- AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
-
- /*
- * MAC may be NULL if it's a broadcast key. In this case no need to
- * to compute get_unaligned_le32 and get_unaligned_le16 as we
- * already know it.
- */
- if (!mac) {
- low_id = 0xffffffff;
- high_id = 0xffff | AR5K_KEYTABLE_VALID;
- } else {
- low_id = get_unaligned_le32(mac);
- high_id = get_unaligned_le16(mac + 4) | AR5K_KEYTABLE_VALID;
- }
-
- ath5k_hw_reg_write(ah, low_id, AR5K_KEYTABLE_MAC0(entry));
- ath5k_hw_reg_write(ah, high_id, AR5K_KEYTABLE_MAC1(entry));
-
- return 0;
-}
-
/**
* ath5k_hw_set_coverage_class - Set IEEE 802.11 coverage class
*
projects / mv-sheeva.git / blobdiff