From 6438696efa8163faa74f16005df7e603d6835933 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Tue, 4 Feb 2014 10:27:41 +0100 Subject: [PATCH] ath9k: move ath9k_rx_accept to common.c we can reuse it on ath9k_htc Signed-off-by: Oleksij Rempel Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/common.c | 88 +++++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/common.h | 6 ++ drivers/net/wireless/ath/ath9k/recv.c | 88 +------------------------ 3 files changed, 95 insertions(+), 87 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c index 120fd46edf0f..5c0d94936a0f 100644 --- a/drivers/net/wireless/ath/ath9k/common.c +++ b/drivers/net/wireless/ath/ath9k/common.c @@ -27,6 +27,94 @@ MODULE_AUTHOR("Atheros Communications"); MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards."); MODULE_LICENSE("Dual BSD/GPL"); +/* Assumes you've already done the endian to CPU conversion */ +bool ath9k_cmn_rx_accept(struct ath_common *common, + struct ieee80211_hdr *hdr, + struct ieee80211_rx_status *rxs, + struct ath_rx_status *rx_stats, + bool *decrypt_error, + unsigned int rxfilter) +{ + struct ath_hw *ah = common->ah; + bool is_mc, is_valid_tkip, strip_mic, mic_error; + __le16 fc; + + fc = hdr->frame_control; + + is_mc = !!is_multicast_ether_addr(hdr->addr1); + is_valid_tkip = rx_stats->rs_keyix != ATH9K_RXKEYIX_INVALID && + test_bit(rx_stats->rs_keyix, common->tkip_keymap); + strip_mic = is_valid_tkip && ieee80211_is_data(fc) && + ieee80211_has_protected(fc) && + !(rx_stats->rs_status & + (ATH9K_RXERR_DECRYPT | ATH9K_RXERR_CRC | ATH9K_RXERR_MIC | + ATH9K_RXERR_KEYMISS)); + + /* + * Key miss events are only relevant for pairwise keys where the + * descriptor does contain a valid key index. This has been observed + * mostly with CCMP encryption. + */ + if (rx_stats->rs_keyix == ATH9K_RXKEYIX_INVALID || + !test_bit(rx_stats->rs_keyix, common->ccmp_keymap)) + rx_stats->rs_status &= ~ATH9K_RXERR_KEYMISS; + + mic_error = is_valid_tkip && !ieee80211_is_ctl(fc) && + !ieee80211_has_morefrags(fc) && + !(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) && + (rx_stats->rs_status & ATH9K_RXERR_MIC); + + /* + * 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) { + u8 status_mask; + + if (rx_stats->rs_status & ATH9K_RXERR_CRC) { + rxs->flag |= RX_FLAG_FAILED_FCS_CRC; + mic_error = false; + } + + if ((rx_stats->rs_status & ATH9K_RXERR_DECRYPT) || + (!is_mc && (rx_stats->rs_status & ATH9K_RXERR_KEYMISS))) { + *decrypt_error = true; + mic_error = false; + } + + + /* + * Reject error frames with the exception of + * decryption and MIC failures. For monitor mode, + * we also ignore the CRC error. + */ + status_mask = ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | + ATH9K_RXERR_KEYMISS; + + if (ah->is_monitoring && (rxfilter & FIF_FCSFAIL)) + status_mask |= ATH9K_RXERR_CRC; + + if (rx_stats->rs_status & ~status_mask) + return false; + } + + /* + * For unicast frames the MIC error bit can have false positives, + * so all MIC error reports need to be validated in software. + * False negatives are not common, so skip software verification + * if the hardware considers the MIC valid. + */ + if (strip_mic) + rxs->flag |= RX_FLAG_MMIC_STRIPPED; + else if (is_mc && mic_error) + rxs->flag |= RX_FLAG_MMIC_ERROR; + + return true; +} +EXPORT_SYMBOL(ath9k_cmn_rx_accept); + int ath9k_cmn_process_rate(struct ath_common *common, struct ieee80211_hw *hw, struct ath_rx_status *rx_stats, diff --git a/drivers/net/wireless/ath/ath9k/common.h b/drivers/net/wireless/ath/ath9k/common.h index 729482f4c35d..c59d3f5db2c3 100644 --- a/drivers/net/wireless/ath/ath9k/common.h +++ b/drivers/net/wireless/ath/ath9k/common.h @@ -42,6 +42,12 @@ #define ATH_EP_RND(x, mul) \ (((x) + ((mul)/2)) / (mul)) +bool ath9k_cmn_rx_accept(struct ath_common *common, + struct ieee80211_hdr *hdr, + struct ieee80211_rx_status *rxs, + struct ath_rx_status *rx_stats, + bool *decrypt_error, + unsigned int rxfilter); int ath9k_cmn_process_rate(struct ath_common *common, struct ieee80211_hw *hw, struct ath_rx_status *rx_stats, diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index ab6a86c2db43..4dedbc237c9d 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -755,92 +755,6 @@ static struct ath_rxbuf *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 ieee80211_hdr *hdr, - struct ieee80211_rx_status *rxs, - struct ath_rx_status *rx_stats, - bool *decrypt_error) -{ - struct ath_softc *sc = (struct ath_softc *) common->priv; - bool is_mc, is_valid_tkip, strip_mic, mic_error; - struct ath_hw *ah = common->ah; - __le16 fc; - - fc = hdr->frame_control; - - is_mc = !!is_multicast_ether_addr(hdr->addr1); - is_valid_tkip = rx_stats->rs_keyix != ATH9K_RXKEYIX_INVALID && - test_bit(rx_stats->rs_keyix, common->tkip_keymap); - strip_mic = is_valid_tkip && ieee80211_is_data(fc) && - ieee80211_has_protected(fc) && - !(rx_stats->rs_status & - (ATH9K_RXERR_DECRYPT | ATH9K_RXERR_CRC | ATH9K_RXERR_MIC | - ATH9K_RXERR_KEYMISS)); - - /* - * Key miss events are only relevant for pairwise keys where the - * descriptor does contain a valid key index. This has been observed - * mostly with CCMP encryption. - */ - if (rx_stats->rs_keyix == ATH9K_RXKEYIX_INVALID || - !test_bit(rx_stats->rs_keyix, common->ccmp_keymap)) - rx_stats->rs_status &= ~ATH9K_RXERR_KEYMISS; - - mic_error = is_valid_tkip && !ieee80211_is_ctl(fc) && - !ieee80211_has_morefrags(fc) && - !(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) && - (rx_stats->rs_status & ATH9K_RXERR_MIC); - - /* - * 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) { - u8 status_mask; - - if (rx_stats->rs_status & ATH9K_RXERR_CRC) { - rxs->flag |= RX_FLAG_FAILED_FCS_CRC; - mic_error = false; - } - - if ((rx_stats->rs_status & ATH9K_RXERR_DECRYPT) || - (!is_mc && (rx_stats->rs_status & ATH9K_RXERR_KEYMISS))) { - *decrypt_error = true; - mic_error = false; - } - - /* - * Reject error frames with the exception of - * decryption and MIC failures. For monitor mode, - * we also ignore the CRC error. - */ - status_mask = ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC | - ATH9K_RXERR_KEYMISS; - - if (ah->is_monitoring && (sc->rx.rxfilter & FIF_FCSFAIL)) - status_mask |= ATH9K_RXERR_CRC; - - if (rx_stats->rs_status & ~status_mask) - return false; - } - - /* - * For unicast frames the MIC error bit can have false positives, - * so all MIC error reports need to be validated in software. - * False negatives are not common, so skip software verification - * if the hardware considers the MIC valid. - */ - if (strip_mic) - rxs->flag |= RX_FLAG_MMIC_STRIPPED; - else if (is_mc && mic_error) - rxs->flag |= RX_FLAG_MMIC_ERROR; - - return true; -} - static void ath9k_process_tsf(struct ath_rx_status *rs, struct ieee80211_rx_status *rxs, u64 tsf) @@ -939,7 +853,7 @@ static int ath9k_rx_skb_preprocess(struct ath_softc *sc, * 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, hdr, rx_status, rx_stats, decrypt_error)) { + if (!ath9k_cmn_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error, sc->rx.rxfilter)) { ret = -EINVAL; goto exit; } -- 2.20.1