MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards.");
MODULE_LICENSE("Dual BSD/GPL");
-/* Common RX processing */
-
-/* Assumes you've already done the endian to CPU conversion */
-static bool ath9k_rx_accept(struct ath_common *common,
- struct sk_buff *skb,
- struct ieee80211_rx_status *rxs,
- struct ath_rx_status *rx_stats,
- bool *decrypt_error)
-{
- struct ath_hw *ah = common->ah;
- struct ieee80211_hdr *hdr;
- __le16 fc;
-
- hdr = (struct ieee80211_hdr *) skb->data;
- fc = hdr->frame_control;
-
- if (!rx_stats->rs_datalen)
- return false;
- /*
- * rs_status follows rs_datalen so if rs_datalen is too large
- * we can take a hint that hardware corrupted it, so ignore
- * those frames.
- */
- if (rx_stats->rs_datalen > common->rx_bufsize)
- return false;
-
- /*
- * rs_more indicates chained descriptors which can be used
- * to link buffers together for a sort of scatter-gather
- * operation.
- * reject the frame, we don't support scatter-gather yet and
- * the frame is probably corrupt anyway
- */
- if (rx_stats->rs_more)
- return false;
-
- /*
- * The rx_stats->rs_status will not be set until the end of the
- * chained descriptors so it can be ignored if rs_more is set. The
- * rs_more will be false at the last element of the chained
- * descriptors.
- */
- if (rx_stats->rs_status != 0) {
- if (rx_stats->rs_status & ATH9K_RXERR_CRC)
- rxs->flag |= RX_FLAG_FAILED_FCS_CRC;
- if (rx_stats->rs_status & ATH9K_RXERR_PHY)
- return false;
-
- if (rx_stats->rs_status & ATH9K_RXERR_DECRYPT) {
- *decrypt_error = true;
- } else if (rx_stats->rs_status & ATH9K_RXERR_MIC) {
- if (ieee80211_is_ctl(fc))
- /*
- * Sometimes, we get invalid
- * MIC failures on valid control frames.
- * Remove these mic errors.
- */
- rx_stats->rs_status &= ~ATH9K_RXERR_MIC;
- else
- rxs->flag |= RX_FLAG_MMIC_ERROR;
- }
- /*
- * Reject error frames with the exception of
- * decryption and MIC failures. For monitor mode,
- * we also ignore the CRC error.
- */
- if (ah->opmode == NL80211_IFTYPE_MONITOR) {
- if (rx_stats->rs_status &
- ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
- ATH9K_RXERR_CRC))
- return false;
- } else {
- if (rx_stats->rs_status &
- ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
- return false;
- }
- }
- }
- return true;
-}
-
-static int ath9k_process_rate(struct ath_common *common,
- struct ieee80211_hw *hw,
- struct ath_rx_status *rx_stats,
- struct ieee80211_rx_status *rxs,
- struct sk_buff *skb)
-{
- struct ieee80211_supported_band *sband;
- enum ieee80211_band band;
- unsigned int i = 0;
-
- band = hw->conf.channel->band;
- sband = hw->wiphy->bands[band];
-
- if (rx_stats->rs_rate & 0x80) {
- /* HT rate */
- rxs->flag |= RX_FLAG_HT;
- if (rx_stats->rs_flags & ATH9K_RX_2040)
- rxs->flag |= RX_FLAG_40MHZ;
- if (rx_stats->rs_flags & ATH9K_RX_GI)
- rxs->flag |= RX_FLAG_SHORT_GI;
- rxs->rate_idx = rx_stats->rs_rate & 0x7f;
- return 0;
- }
-
- for (i = 0; i < sband->n_bitrates; i++) {
- if (sband->bitrates[i].hw_value == rx_stats->rs_rate) {
- rxs->rate_idx = i;
- return 0;
- }
- if (sband->bitrates[i].hw_value_short == rx_stats->rs_rate) {
- rxs->flag |= RX_FLAG_SHORTPRE;
- rxs->rate_idx = i;
- return 0;
- }
- }
-
- /*
- * No valid hardware bitrate found -- we should not get here
- * because hardware has already validated this frame as OK.
- */
- ath_print(common, ATH_DBG_XMIT, "unsupported hw bitrate detected "
- "0x%02x using 1 Mbit\n", rx_stats->rs_rate);
- if ((common->debug_mask & ATH_DBG_XMIT))
- print_hex_dump_bytes("", DUMP_PREFIX_NONE, skb->data, skb->len);
-
- return -EINVAL;
-}
-
-static void ath9k_process_rssi(struct ath_common *common,
- struct ieee80211_hw *hw,
- struct sk_buff *skb,
- struct ath_rx_status *rx_stats)
-{
- struct ath_hw *ah = common->ah;
- struct ieee80211_sta *sta;
- struct ieee80211_hdr *hdr;
- struct ath_node *an;
- int last_rssi = ATH_RSSI_DUMMY_MARKER;
- __le16 fc;
-
- hdr = (struct ieee80211_hdr *)skb->data;
- fc = hdr->frame_control;
-
- rcu_read_lock();
- /*
- * XXX: use ieee80211_find_sta! This requires quite a bit of work
- * under the current ath9k virtual wiphy implementation as we have
- * no way of tying a vif to wiphy. Typically vifs are attached to
- * at least one sdata of a wiphy on mac80211 but with ath9k virtual
- * wiphy you'd have to iterate over every wiphy and each sdata.
- */
- sta = ieee80211_find_sta_by_hw(hw, hdr->addr2);
- if (sta) {
- an = (struct ath_node *) sta->drv_priv;
- if (rx_stats->rs_rssi != ATH9K_RSSI_BAD &&
- !rx_stats->rs_moreaggr)
- ATH_RSSI_LPF(an->last_rssi, rx_stats->rs_rssi);
- last_rssi = an->last_rssi;
- }
- rcu_read_unlock();
-
- if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
- rx_stats->rs_rssi = ATH_EP_RND(last_rssi,
- ATH_RSSI_EP_MULTIPLIER);
- if (rx_stats->rs_rssi < 0)
- rx_stats->rs_rssi = 0;
-
- /* Update Beacon RSSI, this is used by ANI. */
- if (ieee80211_is_beacon(fc))
- ah->stats.avgbrssi = rx_stats->rs_rssi;
-}
-
-/*
- * For Decrypt or Demic errors, we only mark packet status here and always push
- * up the frame up to let mac80211 handle the actual error case, be it no
- * decryption key or real decryption error. This let us keep statistics there.
- */
-int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
- struct ieee80211_hw *hw,
- struct sk_buff *skb,
- struct ath_rx_status *rx_stats,
- struct ieee80211_rx_status *rx_status,
- bool *decrypt_error)
-{
- struct ath_hw *ah = common->ah;
-
- memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
-
- /*
- * everything but the rate is checked here, the rate check is done
- * separately to avoid doing two lookups for a rate for each frame.
- */
- if (!ath9k_rx_accept(common, skb, rx_status, rx_stats, decrypt_error))
- return -EINVAL;
-
- ath9k_process_rssi(common, hw, skb, rx_stats);
-
- if (ath9k_process_rate(common, hw, rx_stats, rx_status, skb))
- return -EINVAL;
-
- rx_status->mactime = ath9k_hw_extend_tsf(ah, rx_stats->rs_tstamp);
- rx_status->band = hw->conf.channel->band;
- rx_status->freq = hw->conf.channel->center_freq;
- rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi;
- rx_status->antenna = rx_stats->rs_antenna;
- rx_status->flag |= RX_FLAG_TSFT;
-
- return 0;
-}
-EXPORT_SYMBOL(ath9k_cmn_rx_skb_preprocess);
-
-void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
- struct sk_buff *skb,
- struct ath_rx_status *rx_stats,
- struct ieee80211_rx_status *rxs,
- bool decrypt_error)
-{
- struct ath_hw *ah = common->ah;
- struct ieee80211_hdr *hdr;
- int hdrlen, padpos, padsize;
- u8 keyix;
- __le16 fc;
-
- /* see if any padding is done by the hw and remove it */
- hdr = (struct ieee80211_hdr *) skb->data;
- hdrlen = ieee80211_get_hdrlen_from_skb(skb);
- fc = hdr->frame_control;
- padpos = ath9k_cmn_padpos(hdr->frame_control);
-
- /* The MAC header is padded to have 32-bit boundary if the
- * packet payload is non-zero. The general calculation for
- * padsize would take into account odd header lengths:
- * padsize = (4 - padpos % 4) % 4; However, since only
- * even-length headers are used, padding can only be 0 or 2
- * bytes and we can optimize this a bit. In addition, we must
- * not try to remove padding from short control frames that do
- * not have payload. */
- padsize = padpos & 3;
- if (padsize && skb->len>=padpos+padsize+FCS_LEN) {
- memmove(skb->data + padsize, skb->data, padpos);
- skb_pull(skb, padsize);
- }
-
- keyix = rx_stats->rs_keyix;
-
- if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
- ieee80211_has_protected(fc)) {
- rxs->flag |= RX_FLAG_DECRYPTED;
- } else if (ieee80211_has_protected(fc)
- && !decrypt_error && skb->len >= hdrlen + 4) {
- keyix = skb->data[hdrlen + 3] >> 6;
-
- if (test_bit(keyix, common->keymap))
- rxs->flag |= RX_FLAG_DECRYPTED;
- }
- if (ah->sw_mgmt_crypto &&
- (rxs->flag & RX_FLAG_DECRYPTED) &&
- ieee80211_is_mgmt(fc))
- /* Use software decrypt for management frames. */
- rxs->flag &= ~RX_FLAG_DECRYPTED;
-}
-EXPORT_SYMBOL(ath9k_cmn_rx_skb_postprocess);
-
int ath9k_cmn_padpos(__le16 frame_control)
{
int padpos = 24;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
if (tx_info->control.hw_key) {
- if (tx_info->control.hw_key->alg == ALG_WEP)
+ switch (tx_info->control.hw_key->cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ case WLAN_CIPHER_SUITE_WEP104:
return ATH9K_KEY_TYPE_WEP;
- else if (tx_info->control.hw_key->alg == ALG_TKIP)
+ case WLAN_CIPHER_SUITE_TKIP:
return ATH9K_KEY_TYPE_TKIP;
- else if (tx_info->control.hw_key->alg == ALG_CCMP)
+ case WLAN_CIPHER_SUITE_CCMP:
return ATH9K_KEY_TYPE_AES;
+ default:
+ break;
+ }
}
return ATH9K_KEY_TYPE_CLEAR;
return -1;
}
-static int ath_reserve_key_cache_slot(struct ath_common *common)
+static int ath_reserve_key_cache_slot(struct ath_common *common,
+ u32 cipher)
{
int i;
+ if (cipher == WLAN_CIPHER_SUITE_TKIP)
+ return ath_reserve_key_cache_slot_tkip(common);
+
/* First, try to find slots that would not be available for TKIP. */
if (common->splitmic) {
for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) {
struct ath_hw *ah = common->ah;
struct ath9k_keyval hk;
const u8 *mac = NULL;
+ u8 gmac[ETH_ALEN];
int ret = 0;
int idx;
memset(&hk, 0, sizeof(hk));
- switch (key->alg) {
- case ALG_WEP:
+ switch (key->cipher) {
+ case WLAN_CIPHER_SUITE_WEP40:
+ case WLAN_CIPHER_SUITE_WEP104:
hk.kv_type = ATH9K_CIPHER_WEP;
break;
- case ALG_TKIP:
+ case WLAN_CIPHER_SUITE_TKIP:
hk.kv_type = ATH9K_CIPHER_TKIP;
break;
- case ALG_CCMP:
+ case WLAN_CIPHER_SUITE_CCMP:
hk.kv_type = ATH9K_CIPHER_AES_CCM;
break;
default:
memcpy(hk.kv_val, key->key, key->keylen);
if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
- /* For now, use the default keys for broadcast keys. This may
- * need to change with virtual interfaces. */
- idx = key->keyidx;
+ switch (vif->type) {
+ case NL80211_IFTYPE_AP:
+ memcpy(gmac, vif->addr, ETH_ALEN);
+ gmac[0] |= 0x01;
+ mac = gmac;
+ idx = ath_reserve_key_cache_slot(common, key->cipher);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ if (!sta) {
+ idx = key->keyidx;
+ break;
+ }
+ memcpy(gmac, sta->addr, ETH_ALEN);
+ gmac[0] |= 0x01;
+ mac = gmac;
+ idx = ath_reserve_key_cache_slot(common, key->cipher);
+ break;
+ default:
+ idx = key->keyidx;
+ break;
+ }
} else if (key->keyidx) {
if (WARN_ON(!sta))
return -EOPNOTSUPP;
return -EOPNOTSUPP;
mac = sta->addr;
- if (key->alg == ALG_TKIP)
- idx = ath_reserve_key_cache_slot_tkip(common);
- else
- idx = ath_reserve_key_cache_slot(common);
- if (idx < 0)
- return -ENOSPC; /* no free key cache entries */
+ idx = ath_reserve_key_cache_slot(common, key->cipher);
}
- if (key->alg == ALG_TKIP)
+ if (idx < 0)
+ return -ENOSPC; /* no free key cache entries */
+
+ if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
ret = ath_setkey_tkip(common, idx, key->key, &hk, mac,
vif->type == NL80211_IFTYPE_AP);
else
return -EIO;
set_bit(idx, common->keymap);
- if (key->alg == ALG_TKIP) {
+ if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
set_bit(idx + 64, common->keymap);
if (common->splitmic) {
set_bit(idx + 32, common->keymap);
return;
clear_bit(key->hw_key_idx, common->keymap);
- if (key->alg != ALG_TKIP)
+ if (key->cipher != WLAN_CIPHER_SUITE_TKIP)
return;
clear_bit(key->hw_key_idx + 64, common->keymap);
}
EXPORT_SYMBOL(ath9k_cmn_key_delete);
+int ath9k_cmn_count_streams(unsigned int chainmask, int max)
+{
+ int streams = 0;
+
+ do {
+ if (++streams == max)
+ break;
+ } while ((chainmask = chainmask & (chainmask - 1)));
+
+ return streams;
+}
+EXPORT_SYMBOL(ath9k_cmn_count_streams);
+
+/*
+ * Configures appropriate weight based on stomp type.
+ */
+void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
+ enum ath_stomp_type stomp_type)
+{
+ struct ath_hw *ah = common->ah;
+
+ switch (stomp_type) {
+ case ATH_BTCOEX_STOMP_ALL:
+ ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+ AR_STOMP_ALL_WLAN_WGHT);
+ break;
+ case ATH_BTCOEX_STOMP_LOW:
+ ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+ AR_STOMP_LOW_WLAN_WGHT);
+ break;
+ case ATH_BTCOEX_STOMP_NONE:
+ ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
+ AR_STOMP_NONE_WLAN_WGHT);
+ break;
+ default:
+ ath_print(common, ATH_DBG_BTCOEX,
+ "Invalid Stomptype\n");
+ break;
+ }
+
+ ath9k_hw_btcoex_enable(ah);
+}
+EXPORT_SYMBOL(ath9k_cmn_btcoex_bt_stomp);
+
static int __init ath9k_cmn_init(void)
{
return 0;
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