diff options
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/common.c | 264 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/common.h | 13 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/recv.c | 267 |
3 files changed, 263 insertions, 281 deletions
diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c index 7707341cd0d..27f9ae56f96 100644 --- a/drivers/net/wireless/ath/ath9k/common.c +++ b/drivers/net/wireless/ath/ath9k/common.c @@ -27,270 +27,6 @@ MODULE_AUTHOR("Atheros Communications"); 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; diff --git a/drivers/net/wireless/ath/ath9k/common.h b/drivers/net/wireless/ath/ath9k/common.h index e08f7e5a26e..1e6f36027ee 100644 --- a/drivers/net/wireless/ath/ath9k/common.h +++ b/drivers/net/wireless/ath/ath9k/common.h @@ -115,19 +115,6 @@ struct ath_node { int last_rssi; }; -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); - -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); - int ath9k_cmn_padpos(__le16 frame_control); int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb); void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index e3e52913d83..a0f89a48509 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -821,6 +821,265 @@ static struct ath_buf *ath_get_next_rx_buf(struct ath_softc *sc, return bf; } +/* 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. + */ +static int ath9k_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; +} + +static void ath9k_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; +} int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) { @@ -883,8 +1142,8 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) if (flush) goto requeue; - retval = ath9k_cmn_rx_skb_preprocess(common, hw, skb, &rs, - rxs, &decrypt_error); + retval = ath9k_rx_skb_preprocess(common, hw, skb, &rs, + rxs, &decrypt_error); if (retval) goto requeue; @@ -908,8 +1167,8 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) if (ah->caps.rx_status_len) skb_pull(skb, ah->caps.rx_status_len); - ath9k_cmn_rx_skb_postprocess(common, skb, &rs, - rxs, decrypt_error); + ath9k_rx_skb_postprocess(common, skb, &rs, + rxs, decrypt_error); /* We will now give hardware our shiny new allocated skb */ bf->bf_mpdu = requeue_skb; |