diff options
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/Makefile | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ath9k.h | 95 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/common.c | 326 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/common.h | 123 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/rc.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/recv.c | 284 |
7 files changed, 467 insertions, 369 deletions
diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig index b735fb399fb1..006364f76bb4 100644 --- a/drivers/net/wireless/ath/ath9k/Kconfig +++ b/drivers/net/wireless/ath/ath9k/Kconfig @@ -1,5 +1,7 @@ config ATH9K_HW tristate +config ATH9K_COMMON + tristate config ATH9K tristate "Atheros 802.11n wireless cards support" @@ -8,6 +10,7 @@ config ATH9K select MAC80211_LEDS select LEDS_CLASS select NEW_LEDS + select ATH9K_COMMON ---help--- This module adds support for wireless adapters based on Atheros IEEE 802.11n AR5008, AR9001 and AR9002 family diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile index 8caf2a8f8953..e53f9680a385 100644 --- a/drivers/net/wireless/ath/ath9k/Makefile +++ b/drivers/net/wireless/ath/ath9k/Makefile @@ -23,3 +23,6 @@ ath9k_hw-y:= hw.o \ mac.o \ obj-$(CONFIG_ATH9K_HW) += ath9k_hw.o + +obj-$(CONFIG_ATH9K_COMMON) += ath9k_common.o +ath9k_common-y:= common.o diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index 88969cbae132..d9bcc3abb425 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -19,14 +19,16 @@ #include <linux/etherdevice.h> #include <linux/device.h> -#include <net/mac80211.h> #include <linux/leds.h> -#include "hw.h" #include "rc.h" #include "debug.h" -#include "../ath.h" -#include "../debug.h" +#include "common.h" + +/* + * Header for the ath9k.ko driver core *only* -- hw code nor any other driver + * should rely on this file or its contents. + */ struct ath_node; @@ -99,18 +101,6 @@ enum buffer_type { BUF_XRETRY = BIT(5), }; -struct ath_buf_state { - int bfs_nframes; - u16 bfs_al; - u16 bfs_frmlen; - int bfs_seqno; - int bfs_tidno; - int bfs_retries; - u8 bf_type; - u32 bfs_keyix; - enum ath9k_key_type bfs_keytype; -}; - #define bf_nframes bf_state.bfs_nframes #define bf_al bf_state.bfs_al #define bf_frmlen bf_state.bfs_frmlen @@ -125,21 +115,6 @@ struct ath_buf_state { #define bf_isretried(bf) (bf->bf_state.bf_type & BUF_RETRY) #define bf_isxretried(bf) (bf->bf_state.bf_type & BUF_XRETRY) -struct ath_buf { - struct list_head list; - struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or - an aggregate) */ - struct ath_buf *bf_next; /* next subframe in the aggregate */ - struct sk_buff *bf_mpdu; /* enclosing frame structure */ - struct ath_desc *bf_desc; /* virtual addr of desc */ - dma_addr_t bf_daddr; /* physical addr of desc */ - dma_addr_t bf_buf_addr; /* physical addr of data buffer */ - bool bf_stale; - u16 bf_flags; - struct ath_buf_state bf_state; - dma_addr_t bf_dmacontext; -}; - struct ath_descdma { struct ath_desc *dd_desc; dma_addr_t dd_desc_paddr; @@ -159,13 +134,9 @@ void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd, #define ATH_MAX_ANTENNA 3 #define ATH_RXBUF 512 -#define WME_NUM_TID 16 #define ATH_TXBUF 512 #define ATH_TXMAXTRY 13 #define ATH_MGT_TXMAXTRY 4 -#define WME_BA_BMP_SIZE 64 -#define WME_MAX_BA WME_BA_BMP_SIZE -#define ATH_TID_MAX_BUFS (2 * WME_MAX_BA) #define TID_TO_WME_AC(_tid) \ ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \ @@ -173,12 +144,6 @@ void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd, (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \ WME_AC_VO) -#define WME_AC_BE 0 -#define WME_AC_BK 1 -#define WME_AC_VI 2 -#define WME_AC_VO 3 -#define WME_NUM_AC 4 - #define ADDBA_EXCHANGE_ATTEMPTS 10 #define ATH_AGGR_DELIM_SZ 4 #define ATH_AGGR_MINPLEN 256 /* in bytes, minimum packet length */ @@ -252,30 +217,6 @@ struct ath_txq { #define AGGR_ADDBA_COMPLETE BIT(2) #define AGGR_ADDBA_PROGRESS BIT(3) -struct ath_atx_tid { - struct list_head list; - struct list_head buf_q; - struct ath_node *an; - struct ath_atx_ac *ac; - struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; - u16 seq_start; - u16 seq_next; - u16 baw_size; - int tidno; - int baw_head; /* first un-acked tx buffer */ - int baw_tail; /* next unused tx buffer slot */ - int sched; - int paused; - u8 state; -}; - -struct ath_atx_ac { - int sched; - int qnum; - struct list_head list; - struct list_head tid_q; -}; - struct ath_tx_control { struct ath_txq *txq; int if_id; @@ -286,29 +227,6 @@ struct ath_tx_control { #define ATH_TX_XRETRY 0x02 #define ATH_TX_BAR 0x04 -#define ATH_RSSI_LPF_LEN 10 -#define RSSI_LPF_THRESHOLD -20 -#define ATH_RSSI_EP_MULTIPLIER (1<<7) -#define ATH_EP_MUL(x, mul) ((x) * (mul)) -#define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER)) -#define ATH_LPF_RSSI(x, y, len) \ - ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y)) -#define ATH_RSSI_LPF(x, y) do { \ - if ((y) >= RSSI_LPF_THRESHOLD) \ - x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \ -} while (0) -#define ATH_EP_RND(x, mul) \ - ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) - -struct ath_node { - struct ath_softc *an_sc; - struct ath_atx_tid tid[WME_NUM_TID]; - struct ath_atx_ac ac[WME_NUM_AC]; - u16 maxampdu; - u8 mpdudensity; - int last_rssi; -}; - struct ath_tx { u16 seq_no; u32 txqsetup; @@ -493,7 +411,6 @@ struct ath_led { #define IEEE80211_WEP_NKID 4 /* number of key ids */ #define ATH_TXPOWER_MAX 100 /* .5 dBm units */ -#define ATH_RSSI_DUMMY_MARKER 0x127 #define ATH_RATE_DUMMY_MARKER 0 #define SC_OP_INVALID BIT(0) diff --git a/drivers/net/wireless/ath/ath9k/common.c b/drivers/net/wireless/ath/ath9k/common.c new file mode 100644 index 000000000000..5fb164e294de --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/common.c @@ -0,0 +1,326 @@ +/* + * Copyright (c) 2009 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * Module for common driver code between ath9k and ath9k_htc + */ + +#include <linux/kernel.h> +#include <linux/module.h> + +#include "common.h" + +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; + + if (rx_stats->rs_more) { + /* + * Frame spans multiple descriptors; this cannot happen yet + * as we don't support jumbograms. If not in monitor mode, + * discard the frame. Enable this if you want to see + * error frames in Monitor mode. + */ + if (ah->opmode != NL80211_IFTYPE_MONITOR) + return false; + } else 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 u8 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; + return rx_stats->rs_rate & 0x7f; + } + + for (i = 0; i < sband->n_bitrates; i++) { + if (sband->bitrates[i].hw_value == rx_stats->rs_rate) + return i; + if (sband->bitrates[i].hw_value_short == rx_stats->rs_rate) { + rxs->flag |= RX_FLAG_SHORTPRE; + return i; + } + } + + /* No valid hardware bitrate found -- we should not get here */ + 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 0; +} + +/* + * Theory for reporting quality: + * + * At a hardware RSSI of 45 you will be able to use MCS 7 reliably. + * At a hardware RSSI of 45 you will be able to use MCS 15 reliably. + * At a hardware RSSI of 35 you should be able use 54 Mbps reliably. + * + * MCS 7 is the highets MCS index usable by a 1-stream device. + * MCS 15 is the highest MCS index usable by a 2-stream device. + * + * All ath9k devices are either 1-stream or 2-stream. + * + * How many bars you see is derived from the qual reporting. + * + * A more elaborate scheme can be used here but it requires tables + * of SNR/throughput for each possible mode used. For the MCS table + * you can refer to the wireless wiki: + * + * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n + * + */ +static int ath9k_compute_qual(struct ieee80211_hw *hw, + struct ath_rx_status *rx_stats) +{ + int qual; + + if (conf_is_ht(&hw->conf)) + qual = rx_stats->rs_rssi * 100 / 45; + else + qual = rx_stats->rs_rssi * 100 / 35; + + /* + * rssi can be more than 45 though, anything above that + * should be considered at 100% + */ + if (qual > 100) + qual = 100; + + return qual; +} + +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; + else if (rx_stats->rs_rssi > 127) + rx_stats->rs_rssi = 127; + + /* 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; + + if (!ath9k_rx_accept(common, skb, rx_status, rx_stats, decrypt_error)) + return -EINVAL; + + ath9k_process_rssi(common, hw, skb, rx_stats); + + rx_status->rate_idx = ath9k_process_rate(common, hw, + rx_stats, rx_status, skb); + 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->noise = common->ani.noise_floor; + rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi; + rx_status->antenna = rx_stats->rs_antenna; + rx_status->qual = ath9k_compute_qual(hw, rx_stats); + 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, 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; + + /* 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 - hdrlen % 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 = hdrlen & 3; + if (padsize && hdrlen >= 24) { + memmove(skb->data + padsize, skb->data, hdrlen); + skb_pull(skb, padsize); + } + + keyix = rx_stats->rs_keyix; + + if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error) { + 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); + +static int __init ath9k_cmn_init(void) +{ + return 0; +} +module_init(ath9k_cmn_init); + +static void __exit ath9k_cmn_exit(void) +{ + return; +} +module_exit(ath9k_cmn_exit); diff --git a/drivers/net/wireless/ath/ath9k/common.h b/drivers/net/wireless/ath/ath9k/common.h new file mode 100644 index 000000000000..292e3d860c0e --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/common.h @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2009 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <net/mac80211.h> + +#include "../ath.h" +#include "../debug.h" + +#include "hw.h" + +/* Common header for Atheros 802.11n base driver cores */ + +#define WME_NUM_TID 16 +#define WME_BA_BMP_SIZE 64 +#define WME_MAX_BA WME_BA_BMP_SIZE +#define ATH_TID_MAX_BUFS (2 * WME_MAX_BA) + +#define WME_AC_BE 0 +#define WME_AC_BK 1 +#define WME_AC_VI 2 +#define WME_AC_VO 3 +#define WME_NUM_AC 4 + +#define ATH_RSSI_DUMMY_MARKER 0x127 +#define ATH_RSSI_LPF_LEN 10 +#define RSSI_LPF_THRESHOLD -20 +#define ATH_RSSI_EP_MULTIPLIER (1<<7) +#define ATH_EP_MUL(x, mul) ((x) * (mul)) +#define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER)) +#define ATH_LPF_RSSI(x, y, len) \ + ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y)) +#define ATH_RSSI_LPF(x, y) do { \ + if ((y) >= RSSI_LPF_THRESHOLD) \ + x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \ +} while (0) +#define ATH_EP_RND(x, mul) \ + ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) + +struct ath_atx_ac { + int sched; + int qnum; + struct list_head list; + struct list_head tid_q; +}; + +struct ath_buf_state { + int bfs_nframes; + u16 bfs_al; + u16 bfs_frmlen; + int bfs_seqno; + int bfs_tidno; + int bfs_retries; + u8 bf_type; + u32 bfs_keyix; + enum ath9k_key_type bfs_keytype; +}; + +struct ath_buf { + struct list_head list; + struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or + an aggregate) */ + struct ath_buf *bf_next; /* next subframe in the aggregate */ + struct sk_buff *bf_mpdu; /* enclosing frame structure */ + struct ath_desc *bf_desc; /* virtual addr of desc */ + dma_addr_t bf_daddr; /* physical addr of desc */ + dma_addr_t bf_buf_addr; /* physical addr of data buffer */ + bool bf_stale; + u16 bf_flags; + struct ath_buf_state bf_state; + dma_addr_t bf_dmacontext; +}; + +struct ath_atx_tid { + struct list_head list; + struct list_head buf_q; + struct ath_node *an; + struct ath_atx_ac *ac; + struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; + u16 seq_start; + u16 seq_next; + u16 baw_size; + int tidno; + int baw_head; /* first un-acked tx buffer */ + int baw_tail; /* next unused tx buffer slot */ + int sched; + int paused; + u8 state; +}; + +struct ath_node { + struct ath_common *common; + struct ath_atx_tid tid[WME_NUM_TID]; + struct ath_atx_ac ac[WME_NUM_AC]; + u16 maxampdu; + u8 mpdudensity; + 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); diff --git a/drivers/net/wireless/ath/ath9k/rc.h b/drivers/net/wireless/ath/ath9k/rc.h index fa21a628ddd0..94cb9f8d2446 100644 --- a/drivers/net/wireless/ath/ath9k/rc.h +++ b/drivers/net/wireless/ath/ath9k/rc.h @@ -19,6 +19,8 @@ #ifndef RC_H #define RC_H +#include "hw.h" + struct ath_softc; #define ATH_RATE_MAX 30 diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 8b7489d61d38..477365e5ae69 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -89,282 +89,6 @@ static void ath_setdefantenna(struct ath_softc *sc, u32 antenna) sc->rx.rxotherant = 0; } -/* 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; - - if (rx_stats->rs_more) { - /* - * Frame spans multiple descriptors; this cannot happen yet - * as we don't support jumbograms. If not in monitor mode, - * discard the frame. Enable this if you want to see - * error frames in Monitor mode. - */ - if (ah->opmode != NL80211_IFTYPE_MONITOR) - return false; - } else 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 u8 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; - return rx_stats->rs_rate & 0x7f; - } - - for (i = 0; i < sband->n_bitrates; i++) { - if (sband->bitrates[i].hw_value == rx_stats->rs_rate) - return i; - if (sband->bitrates[i].hw_value_short == rx_stats->rs_rate) { - rxs->flag |= RX_FLAG_SHORTPRE; - return i; - } - } - - /* No valid hardware bitrate found -- we should not get here */ - 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 0; -} - -/* - * Theory for reporting quality: - * - * At a hardware RSSI of 45 you will be able to use MCS 7 reliably. - * At a hardware RSSI of 45 you will be able to use MCS 15 reliably. - * At a hardware RSSI of 35 you should be able use 54 Mbps reliably. - * - * MCS 7 is the highets MCS index usable by a 1-stream device. - * MCS 15 is the highest MCS index usable by a 2-stream device. - * - * All ath9k devices are either 1-stream or 2-stream. - * - * How many bars you see is derived from the qual reporting. - * - * A more elaborate scheme can be used here but it requires tables - * of SNR/throughput for each possible mode used. For the MCS table - * you can refer to the wireless wiki: - * - * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n - * - */ -static int ath9k_compute_qual(struct ieee80211_hw *hw, - struct ath_rx_status *rx_stats) -{ - int qual; - - if (conf_is_ht(&hw->conf)) - qual = rx_stats->rs_rssi * 100 / 45; - else - qual = rx_stats->rs_rssi * 100 / 35; - - /* - * rssi can be more than 45 though, anything above that - * should be considered at 100% - */ - if (qual > 100) - qual = 100; - - return qual; -} - -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! */ - 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; - else if (rx_stats->rs_rssi > 127) - rx_stats->rs_rssi = 127; - - /* 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; - - if (!ath9k_rx_accept(common, skb, rx_status, rx_stats, decrypt_error)) - return -EINVAL; - - ath9k_process_rssi(common, hw, skb, rx_stats); - - rx_status->rate_idx = ath9k_process_rate(common, hw, - rx_stats, rx_status, skb); - 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->noise = common->ani.noise_floor; - rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi; - rx_status->antenna = rx_stats->rs_antenna; - rx_status->qual = ath9k_compute_qual(hw, rx_stats); - 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, 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; - - /* 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 - hdrlen % 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 = hdrlen & 3; - if (padsize && hdrlen >= 24) { - memmove(skb->data + padsize, skb->data, hdrlen); - skb_pull(skb, padsize); - } - - keyix = rx_stats->rs_keyix; - - if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error) { - 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; -} - static void ath_opmode_init(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; @@ -854,8 +578,8 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) if (flush) goto requeue; - retval = ath9k_rx_skb_preprocess(common, hw, skb, rx_stats, - rxs, &decrypt_error); + retval = ath9k_cmn_rx_skb_preprocess(common, hw, skb, rx_stats, + rxs, &decrypt_error); if (retval) goto requeue; @@ -877,8 +601,8 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) skb_put(skb, rx_stats->rs_datalen); - ath9k_rx_skb_postprocess(common, skb, rx_stats, - rxs, decrypt_error); + ath9k_cmn_rx_skb_postprocess(common, skb, rx_stats, + rxs, decrypt_error); /* We will now give hardware our shiny new allocated skb */ bf->bf_mpdu = requeue_skb; |