/* * Copyright (c) 2008 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. */ #ifndef CORE_H #define CORE_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ath9k.h" #include "rc.h" struct ath_node; /******************/ /* Utility macros */ /******************/ /* An attempt will be made to merge these link list helpers upstream * instead */ static inline void __list_splice_tail(const struct list_head *list, struct list_head *head) { struct list_head *first = list->next; struct list_head *last = list->prev; struct list_head *current_tail = head->prev; current_tail->next = first; last->next = head; head->prev = last; first->prev = current_tail; } static inline void __list_cut_position(struct list_head *list, struct list_head *head, struct list_head *entry) { struct list_head *new_first = (entry->next != head) ? entry->next : head; list->next = head->next; list->next->prev = list; list->prev = entry; entry->next = list; head->next = new_first; new_first->prev = head; } /** * list_splice_tail - join two lists, each list being a queue * @list: the new list to add. * @head: the place to add it in the first list. */ static inline void list_splice_tail(const struct list_head *list, struct list_head *head) { if (!list_empty(list)) __list_splice_tail(list, head); } /** * list_splice_tail_init - join two lists, each list being a queue, and * reinitialise the emptied list. * @list: the new list to add. * @head: the place to add it in the first list. * * The list at @list is reinitialised */ static inline void list_splice_tail_init(struct list_head *list, struct list_head *head) { if (!list_empty(list)) { __list_splice_tail(list, head); INIT_LIST_HEAD(list); } } /** * list_cut_position - cut a list into two * @list: a new list to add all removed entries * @head: a list with entries * @entry: an entry within head, could be the head itself * and if so we won't won't cut the list */ static inline void list_cut_position(struct list_head *list, struct list_head *head, struct list_head *entry) { BUG_ON(list_empty(head)); if (list_is_singular(head)) BUG_ON(head->next != entry && head != entry); if (entry == head) INIT_LIST_HEAD(list); else __list_cut_position(list, head, entry); } /* Macro to expand scalars to 64-bit objects */ #define ito64(x) (sizeof(x) == 8) ? \ (((unsigned long long int)(x)) & (0xff)) : \ (sizeof(x) == 16) ? \ (((unsigned long long int)(x)) & 0xffff) : \ ((sizeof(x) == 32) ? \ (((unsigned long long int)(x)) & 0xffffffff) : \ (unsigned long long int)(x)) /* increment with wrap-around */ #define INCR(_l, _sz) do { \ (_l)++; \ (_l) &= ((_sz) - 1); \ } while (0) /* decrement with wrap-around */ #define DECR(_l, _sz) do { \ (_l)--; \ (_l) &= ((_sz) - 1); \ } while (0) #define A_MAX(a, b) ((a) > (b) ? (a) : (b)) #define ASSERT(exp) do { \ if (unlikely(!(exp))) { \ BUG(); \ } \ } while (0) /* XXX: remove */ #define memzero(_buf, _len) memset(_buf, 0, _len) #define get_dma_mem_context(var, field) (&((var)->field)) #define copy_dma_mem_context(dst, src) (*dst = *src) #define ATH9K_BH_STATUS_INTACT 0 #define ATH9K_BH_STATUS_CHANGE 1 #define ATH_TXQ_SETUP(sc, i) ((sc)->sc_txqsetup & (1<sc_debug & (_m)) \ printk(_fmt , ##__VA_ARGS__); \ } while (0) /***************************/ /* Load-time Configuration */ /***************************/ /* Per-instance load-time (note: NOT run-time) configurations * for Atheros Device */ struct ath_config { u32 ath_aggr_prot; u16 txpowlimit; u16 txpowlimit_override; u8 cabqReadytime; /* Cabq Readytime % */ u8 swBeaconProcess; /* Process received beacons in SW (vs HW) */ }; /***********************/ /* Chainmask Selection */ /***********************/ #define ATH_CHAINMASK_SEL_TIMEOUT 6000 /* Default - Number of last RSSI values that is used for * chainmask selection */ #define ATH_CHAINMASK_SEL_RSSI_CNT 10 /* Means use 3x3 chainmask instead of configured chainmask */ #define ATH_CHAINMASK_SEL_3X3 7 /* Default - Rssi threshold below which we have to switch to 3x3 */ #define ATH_CHAINMASK_SEL_UP_RSSI_THRES 20 /* Default - Rssi threshold above which we have to switch to * user configured values */ #define ATH_CHAINMASK_SEL_DOWN_RSSI_THRES 35 /* Struct to store the chainmask select related info */ struct ath_chainmask_sel { struct timer_list timer; int cur_tx_mask; /* user configured or 3x3 */ int cur_rx_mask; /* user configured or 3x3 */ int tx_avgrssi; u8 switch_allowed:1, /* timer will set this */ cm_sel_enabled:1; }; int ath_chainmask_sel_logic(struct ath_softc *sc, struct ath_node *an); void ath_update_chainmask(struct ath_softc *sc, int is_ht); /*************************/ /* Descriptor Management */ /*************************/ /* Number of descriptors per buffer. The only case where we see skbuff chains is due to FF aggregation in the driver. */ #define ATH_TXDESC 1 /* if there's more fragment for this MSDU */ #define ATH_BF_MORE_MPDU 1 #define ATH_TXBUF_RESET(_bf) do { \ (_bf)->bf_status = 0; \ (_bf)->bf_lastbf = NULL; \ (_bf)->bf_lastfrm = NULL; \ (_bf)->bf_next = NULL; \ memzero(&((_bf)->bf_state), \ sizeof(struct ath_buf_state)); \ } while (0) struct ath_buf_state { int bfs_nframes; /* # frames in aggregate */ u16 bfs_al; /* length of aggregate */ u16 bfs_frmlen; /* length of frame */ int bfs_seqno; /* sequence number */ int bfs_tidno; /* tid of this frame */ int bfs_retries; /* current retries */ struct ath_rc_series bfs_rcs[4]; /* rate series */ u8 bfs_isdata:1; /* is a data frame/aggregate */ u8 bfs_isaggr:1; /* is an aggregate */ u8 bfs_isampdu:1; /* is an a-mpdu, aggregate or not */ u8 bfs_ht:1; /* is an HT frame */ u8 bfs_isretried:1; /* is retried */ u8 bfs_isxretried:1; /* is excessive retried */ u8 bfs_shpreamble:1; /* is short preamble */ u8 bfs_isbar:1; /* is a BAR */ u8 bfs_ispspoll:1; /* is a PS-Poll */ u8 bfs_aggrburst:1; /* is a aggr burst */ u8 bfs_calcairtime:1; /* requests airtime be calculated when set for tx frame */ int bfs_rifsburst_elem; /* RIFS burst/bar */ int bfs_nrifsubframes; /* # of elements in burst */ /* key type use to encrypt this frame */ 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 #define bf_retries bf_state.bfs_retries #define bf_seqno bf_state.bfs_seqno #define bf_tidno bf_state.bfs_tidno #define bf_rcs bf_state.bfs_rcs #define bf_isdata bf_state.bfs_isdata #define bf_isaggr bf_state.bfs_isaggr #define bf_isampdu bf_state.bfs_isampdu #define bf_ht bf_state.bfs_ht #define bf_isretried bf_state.bfs_isretried #define bf_isxretried bf_state.bfs_isxretried #define bf_shpreamble bf_state.bfs_shpreamble #define bf_rifsburst_elem bf_state.bfs_rifsburst_elem #define bf_nrifsubframes bf_state.bfs_nrifsubframes #define bf_keytype bf_state.bfs_keytype #define bf_isbar bf_state.bfs_isbar #define bf_ispspoll bf_state.bfs_ispspoll #define bf_aggrburst bf_state.bfs_aggrburst #define bf_calcairtime bf_state.bfs_calcairtime /* * Abstraction of a contiguous buffer to transmit/receive. There is only * a single hw descriptor encapsulated here. */ struct ath_buf { struct list_head list; struct list_head *last; struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or an aggregate) */ struct ath_buf *bf_lastfrm; /* last buf of this frame */ struct ath_buf *bf_next; /* next subframe in the aggregate */ struct ath_buf *bf_rifslast; /* last buf for RIFS burst */ void *bf_mpdu; /* enclosing frame structure */ void *bf_node; /* pointer to the node */ 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 */ u32 bf_status; u16 bf_flags; /* tx descriptor flags */ struct ath_buf_state bf_state; /* buffer state */ dma_addr_t bf_dmacontext; }; /* * reset the rx buffer. * any new fields added to the athbuf and require * reset need to be added to this macro. * currently bf_status is the only one requires that * requires reset. */ #define ATH_RXBUF_RESET(_bf) ((_bf)->bf_status = 0) /* hw processing complete, desc processed by hal */ #define ATH_BUFSTATUS_DONE 0x00000001 /* hw processing complete, desc hold for hw */ #define ATH_BUFSTATUS_STALE 0x00000002 /* Rx-only: OS is done with this packet and it's ok to queued it to hw */ #define ATH_BUFSTATUS_FREE 0x00000004 /* DMA state for tx/rx descriptors */ struct ath_descdma { const char *dd_name; struct ath_desc *dd_desc; /* descriptors */ dma_addr_t dd_desc_paddr; /* physical addr of dd_desc */ u32 dd_desc_len; /* size of dd_desc */ struct ath_buf *dd_bufptr; /* associated buffers */ dma_addr_t dd_dmacontext; }; /* Abstraction of a received RX MPDU/MMPDU, or a RX fragment */ struct ath_rx_context { struct ath_buf *ctx_rxbuf; /* associated ath_buf for rx */ }; #define ATH_RX_CONTEXT(skb) ((struct ath_rx_context *)skb->cb) int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, struct list_head *head, const char *name, int nbuf, int ndesc); int ath_desc_alloc(struct ath_softc *sc); void ath_desc_free(struct ath_softc *sc); void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd, struct list_head *head); /******/ /* RX */ /******/ #define ATH_MAX_ANTENNA 3 #define ATH_RXBUF 512 #define ATH_RX_TIMEOUT 40 /* 40 milliseconds */ #define WME_NUM_TID 16 #define IEEE80211_BAR_CTL_TID_M 0xF000 /* tid mask */ #define IEEE80211_BAR_CTL_TID_S 2 /* tid shift */ enum ATH_RX_TYPE { ATH_RX_NON_CONSUMED = 0, ATH_RX_CONSUMED }; /* per frame rx status block */ struct ath_recv_status { u64 tsf; /* mac tsf */ int8_t rssi; /* RSSI (noise floor ajusted) */ int8_t rssictl[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */ int8_t rssiextn[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */ int8_t abs_rssi; /* absolute RSSI */ u8 rateieee; /* data rate received (IEEE rate code) */ u8 ratecode; /* phy rate code */ int rateKbps; /* data rate received (Kbps) */ int antenna; /* rx antenna */ int flags; /* status of associated skb */ #define ATH_RX_FCS_ERROR 0x01 #define ATH_RX_MIC_ERROR 0x02 #define ATH_RX_DECRYPT_ERROR 0x04 #define ATH_RX_RSSI_VALID 0x08 /* if any of ctl,extn chainrssis are valid */ #define ATH_RX_CHAIN_RSSI_VALID 0x10 /* if extn chain rssis are valid */ #define ATH_RX_RSSI_EXTN_VALID 0x20 /* set if 40Mhz, clear if 20Mhz */ #define ATH_RX_40MHZ 0x40 /* set if short GI, clear if full GI */ #define ATH_RX_SHORT_GI 0x80 }; struct ath_rxbuf { struct sk_buff *rx_wbuf; /* buffer */ unsigned long rx_time; /* system time when received */ struct ath_recv_status rx_status; /* cached rx status */ }; /* Per-TID aggregate receiver state for a node */ struct ath_arx_tid { struct ath_node *an; /* parent ath node */ struct ath_rxbuf *rxbuf; /* re-ordering buffer */ struct timer_list timer; spinlock_t tidlock; /* lock to protect this TID structure */ int baw_head; /* seq_next at head */ int baw_tail; /* tail of block-ack window */ int seq_reset; /* need to reset start sequence */ int addba_exchangecomplete; u16 seq_next; /* next expected sequence */ u16 baw_size; /* block-ack window size */ }; /* Per-node receiver aggregate state */ struct ath_arx { struct ath_arx_tid tid[WME_NUM_TID]; }; int ath_startrecv(struct ath_softc *sc); bool ath_stoprecv(struct ath_softc *sc); void ath_flushrecv(struct ath_softc *sc); u32 ath_calcrxfilter(struct ath_softc *sc); void ath_rx_node_init(struct ath_softc *sc, struct ath_node *an); void ath_rx_node_free(struct ath_softc *sc, struct ath_node *an); void ath_rx_node_cleanup(struct ath_softc *sc, struct ath_node *an); void ath_handle_rx_intr(struct ath_softc *sc); int ath_rx_init(struct ath_softc *sc, int nbufs); void ath_rx_cleanup(struct ath_softc *sc); int ath_rx_tasklet(struct ath_softc *sc, int flush); int ath_rx_input(struct ath_softc *sc, struct ath_node *node, int is_ampdu, struct sk_buff *skb, struct ath_recv_status *rx_status, enum ATH_RX_TYPE *status); int ath__rx_indicate(struct ath_softc *sc, struct sk_buff *skb, struct ath_recv_status *status, u16 keyix); int ath_rx_subframe(struct ath_node *an, struct sk_buff *skb, struct ath_recv_status *status); /******/ /* TX */ /******/ #define ATH_FRAG_PER_MSDU 1 #define ATH_TXBUF (512/ATH_FRAG_PER_MSDU) /* max number of transmit attempts (tries) */ #define ATH_TXMAXTRY 13 /* max number of 11n transmit attempts (tries) */ #define ATH_11N_TXMAXTRY 10 /* max number of tries for management and control frames */ #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 : \ (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \ (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \ WME_AC_VO) /* Wireless Multimedia Extension Defines */ #define WME_AC_BE 0 /* best effort */ #define WME_AC_BK 1 /* background */ #define WME_AC_VI 2 /* video */ #define WME_AC_VO 3 /* voice */ #define WME_NUM_AC 4 enum ATH_SM_PWRSAV{ ATH_SM_ENABLE, ATH_SM_PWRSAV_STATIC, ATH_SM_PWRSAV_DYNAMIC, }; /* * Data transmit queue state. One of these exists for each * hardware transmit queue. Packets sent to us from above * are assigned to queues based on their priority. Not all * devices support a complete set of hardware transmit queues. * For those devices the array sc_ac2q will map multiple * priorities to fewer hardware queues (typically all to one * hardware queue). */ struct ath_txq { u32 axq_qnum; /* hardware q number */ u32 *axq_link; /* link ptr in last TX desc */ struct list_head axq_q; /* transmit queue */ spinlock_t axq_lock; /* lock on q and link */ unsigned long axq_lockflags; /* intr state when must cli */ u32 axq_depth; /* queue depth */ u8 axq_aggr_depth; /* aggregates queued */ u32 axq_totalqueued;/* total ever queued */ u32 axq_intrcnt; /* count to determine if descriptor should generate int on this txq. */ bool stopped; /* Is mac80211 queue stopped ? */ /* State for patching up CTS when bursting */ struct ath_buf *axq_linkbuf; /* virtual addr of last buffer*/ struct ath_desc *axq_lastdsWithCTS; /* first desc of the last descriptor that contains CTS */ struct ath_desc *axq_gatingds; /* final desc of the gating desc * that determines whether lastdsWithCTS has * been DMA'ed or not */ struct list_head axq_acq; }; /* per TID aggregate tx state for a destination */ struct ath_atx_tid { struct list_head list; /* round-robin tid entry */ struct list_head buf_q; /* pending buffers */ struct ath_node *an; /* parent node structure */ struct ath_atx_ac *ac; /* parent access category */ struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];/* active tx frames */ u16 seq_start; /* starting seq of BA window */ u16 seq_next; /* next seq to be used */ u16 baw_size; /* BA window size */ int tidno; /* TID number */ int baw_head; /* first un-acked tx buffer */ int baw_tail; /* next unused tx buffer slot */ int sched; /* TID is scheduled */ int paused; /* TID is paused */ int cleanup_inprogress; /* aggr of this TID is being teared down */ u32 addba_exchangecomplete:1; /* ADDBA state */ int32_t addba_exchangeinprogress; int addba_exchangeattempts; }; /* per access-category aggregate tx state for a destination */ struct ath_atx_ac { int sched; /* dest-ac is scheduled */ int qnum; /* H/W queue number associated with this AC */ struct list_head list; /* round-robin txq entry */ struct list_head tid_q; /* queue of TIDs with buffers */ }; /* per dest tx state */ struct ath_atx { struct ath_atx_tid tid[WME_NUM_TID]; struct ath_atx_ac ac[WME_NUM_AC]; }; /* per-frame tx control block */ struct ath_tx_control { struct ath_node *an; /* destination to sent to */ int if_id; /* only valid for cab traffic */ int qnum; /* h/w queue number */ u32 ht:1; /* if it can be transmitted using HT */ u32 ps:1; /* if one or more stations are in PS mode */ u32 use_minrate:1; /* if this frame should transmitted using minimum rate */ enum ath9k_pkt_type atype; /* Atheros packet type */ enum ath9k_key_type keytype; /* key type */ u32 flags; /* HAL flags */ u16 seqno; /* sequence number */ u16 tidno; /* tid number */ u16 txpower; /* transmit power */ u16 frmlen; /* frame length */ u32 keyix; /* key index */ int min_rate; /* minimum rate */ int mcast_rate; /* multicast rate */ u16 nextfraglen; /* next fragment length */ /* below is set only by ath_dev */ struct ath_softc *dev; /* device handle */ dma_addr_t dmacontext; }; /* per frame tx status block */ struct ath_xmit_status { int retries; /* number of retries to successufully transmit this frame */ int flags; /* status of transmit */ #define ATH_TX_ERROR 0x01 #define ATH_TX_XRETRY 0x02 #define ATH_TX_BAR 0x04 }; struct ath_tx_stat { int rssi; /* RSSI (noise floor ajusted) */ int rssictl[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */ int rssiextn[ATH_MAX_ANTENNA]; /* RSSI (noise floor ajusted) */ int rateieee; /* data rate xmitted (IEEE rate code) */ int rateKbps; /* data rate xmitted (Kbps) */ int ratecode; /* phy rate code */ int flags; /* validity flags */ /* if any of ctl,extn chain rssis are valid */ #define ATH_TX_CHAIN_RSSI_VALID 0x01 /* if extn chain rssis are valid */ #define ATH_TX_RSSI_EXTN_VALID 0x02 u32 airtime; /* time on air per final tx rate */ }; struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype); void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq); int ath_tx_setup(struct ath_softc *sc, int haltype); void ath_draintxq(struct ath_softc *sc, bool retry_tx); void ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx); void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an); void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an, bool bh_flag); void ath_tx_node_free(struct ath_softc *sc, struct ath_node *an); void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq); int ath_tx_init(struct ath_softc *sc, int nbufs); int ath_tx_cleanup(struct ath_softc *sc); int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype); int ath_txq_update(struct ath_softc *sc, int qnum, struct ath9k_txq_info *q); int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb); void ath_tx_tasklet(struct ath_softc *sc); u32 ath_txq_depth(struct ath_softc *sc, int qnum); u32 ath_txq_aggr_depth(struct ath_softc *sc, int qnum); void ath_notify_txq_status(struct ath_softc *sc, u16 queue_depth); void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, struct ath_xmit_status *tx_status, struct ath_node *an); /**********************/ /* Node / Aggregation */ /**********************/ /* indicates the node is clened up */ #define ATH_NODE_CLEAN 0x1 /* indicates the node is 80211 power save */ #define ATH_NODE_PWRSAVE 0x2 #define ADDBA_TIMEOUT 200 /* 200 milliseconds */ #define ADDBA_EXCHANGE_ATTEMPTS 10 #define ATH_AGGR_DELIM_SZ 4 /* delimiter size */ #define ATH_AGGR_MINPLEN 256 /* in bytes, minimum packet length */ /* number of delimiters for encryption padding */ #define ATH_AGGR_ENCRYPTDELIM 10 /* minimum h/w qdepth to be sustained to maximize aggregation */ #define ATH_AGGR_MIN_QDEPTH 2 #define ATH_AMPDU_SUBFRAME_DEFAULT 32 #define IEEE80211_SEQ_SEQ_SHIFT 4 #define IEEE80211_SEQ_MAX 4096 #define IEEE80211_MIN_AMPDU_BUF 0x8 /* return whether a bit at index _n in bitmap _bm is set * _sz is the size of the bitmap */ #define ATH_BA_ISSET(_bm, _n) (((_n) < (WME_BA_BMP_SIZE)) && \ ((_bm)[(_n) >> 5] & (1 << ((_n) & 31)))) /* return block-ack bitmap index given sequence and starting sequence */ #define ATH_BA_INDEX(_st, _seq) (((_seq) - (_st)) & (IEEE80211_SEQ_MAX - 1)) /* returns delimiter padding required given the packet length */ #define ATH_AGGR_GET_NDELIM(_len) \ (((((_len) + ATH_AGGR_DELIM_SZ) < ATH_AGGR_MINPLEN) ? \ (ATH_AGGR_MINPLEN - (_len) - ATH_AGGR_DELIM_SZ) : 0) >> 2) #define BAW_WITHIN(_start, _bawsz, _seqno) \ ((((_seqno) - (_start)) & 4095) < (_bawsz)) #define ATH_DS_BA_SEQ(_ds) ((_ds)->ds_us.tx.ts_seqnum) #define ATH_DS_BA_BITMAP(_ds) (&(_ds)->ds_us.tx.ba_low) #define ATH_DS_TX_BA(_ds) ((_ds)->ds_us.tx.ts_flags & ATH9K_TX_BA) #define ATH_AN_2_TID(_an, _tidno) (&(_an)->an_aggr.tx.tid[(_tidno)]) enum ATH_AGGR_STATUS { ATH_AGGR_DONE, ATH_AGGR_BAW_CLOSED, ATH_AGGR_LIMITED, ATH_AGGR_SHORTPKT, ATH_AGGR_8K_LIMITED, }; enum ATH_AGGR_CHECK { AGGR_NOT_REQUIRED, AGGR_REQUIRED, AGGR_CLEANUP_PROGRESS, AGGR_EXCHANGE_PROGRESS, AGGR_EXCHANGE_DONE }; struct aggr_rifs_param { int param_max_frames; int param_max_len; int param_rl; int param_al; struct ath_rc_series *param_rcs; }; /* Per-node aggregation state */ struct ath_node_aggr { struct ath_atx tx; /* node transmit state */ struct ath_arx rx; /* node receive state */ }; /* driver-specific node state */ struct ath_node { struct list_head list; struct ath_softc *an_sc; /* back pointer */ atomic_t an_refcnt; struct ath_chainmask_sel an_chainmask_sel; struct ath_node_aggr an_aggr; /* A-MPDU aggregation state */ u8 an_smmode; /* SM Power save mode */ u8 an_flags; u8 an_addr[ETH_ALEN]; }; void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid); enum ATH_AGGR_CHECK ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno); void ath_tx_aggr_teardown(struct ath_softc *sc, struct ath_node *an, u8 tidno); void ath_rx_aggr_teardown(struct ath_softc *sc, struct ath_node *an, u8 tidno); int ath_rx_aggr_start(struct ath_softc *sc, const u8 *addr, u16 tid, u16 *ssn); int ath_rx_aggr_stop(struct ath_softc *sc, const u8 *addr, u16 tid); int ath_tx_aggr_start(struct ath_softc *sc, const u8 *addr, u16 tid, u16 *ssn); int ath_tx_aggr_stop(struct ath_softc *sc, const u8 *addr, u16 tid); void ath_newassoc(struct ath_softc *sc, struct ath_node *node, int isnew, int isuapsd); struct ath_node *ath_node_attach(struct ath_softc *sc, u8 addr[ETH_ALEN], int if_id); void ath_node_detach(struct ath_softc *sc, struct ath_node *an, bool bh_flag); struct ath_node *ath_node_get(struct ath_softc *sc, u8 addr[ETH_ALEN]); void ath_node_put(struct ath_softc *sc, struct ath_node *an, bool bh_flag); struct ath_node *ath_node_find(struct ath_softc *sc, u8 *addr); /*******************/ /* Beacon Handling */ /*******************/ /* * Regardless of the number of beacons we stagger, (i.e. regardless of the * number of BSSIDs) if a given beacon does not go out even after waiting this * number of beacon intervals, the game's up. */ #define BSTUCK_THRESH (9 * ATH_BCBUF) #define ATH_BCBUF 4 /* number of beacon buffers */ #define ATH_DEFAULT_BINTVAL 100 /* default beacon interval in TU */ #define ATH_DEFAULT_BMISS_LIMIT 10 #define ATH_BEACON_AIFS_DEFAULT 0 /* Default aifs for ap beacon q */ #define ATH_BEACON_CWMIN_DEFAULT 0 /* Default cwmin for ap beacon q */ #define ATH_BEACON_CWMAX_DEFAULT 0 /* Default cwmax for ap beacon q */ #define IEEE80211_MS_TO_TU(x) (((x) * 1000) / 1024) /* beacon configuration */ struct ath_beacon_config { u16 beacon_interval; u16 listen_interval; u16 dtim_period; u16 bmiss_timeout; u8 dtim_count; u8 tim_offset; union { u64 last_tsf; u8 last_tstamp[8]; } u; /* last received beacon/probe response timestamp of this BSS. */ }; /* offsets in a beacon frame for * quick acess of beacon content by low-level driver */ struct ath_beacon_offset { u8 *bo_tim; /* start of atim/dtim */ }; void ath9k_beacon_tasklet(unsigned long data); void ath_beacon_config(struct ath_softc *sc, int if_id); int ath_beaconq_setup(struct ath_hal *ah); int ath_beacon_alloc(struct ath_softc *sc, int if_id); void ath_bstuck_process(struct ath_softc *sc); void ath_beacon_tasklet(struct ath_softc *sc, int *needmark); void ath_beacon_free(struct ath_softc *sc); void ath_beacon_return(struct ath_softc *sc, struct ath_vap *avp); void ath_beacon_sync(struct ath_softc *sc, int if_id); void ath_update_beacon_info(struct ath_softc *sc, int avgbrssi); void ath_get_beaconconfig(struct ath_softc *sc, int if_id, struct ath_beacon_config *conf); int ath_update_beacon(struct ath_softc *sc, int if_id, struct ath_beacon_offset *bo, struct sk_buff *skb, int mcast); /********/ /* VAPs */ /********/ #define ATH_IF_HW_OFF 0x0001 /* hardware state needs to turn off */ #define ATH_IF_HW_ON 0x0002 /* hardware state needs to turn on */ /* STA only: the associated AP is HT capable */ #define ATH_IF_HT 0x0004 /* AP/IBSS only: current BSS has privacy on */ #define ATH_IF_PRIVACY 0x0008 #define ATH_IF_BEACON_ENABLE 0x0010 /* AP/IBSS only: enable beacon */ #define ATH_IF_BEACON_SYNC 0x0020 /* IBSS only: need to sync beacon */ /* * Define the scheme that we select MAC address for multiple * BSS on the same radio. The very first VAP will just use the MAC * address from the EEPROM. For the next 3 VAPs, we set the * U/L bit (bit 1) in MAC address, and use the next two bits as the * index of the VAP. */ #define ATH_SET_VAP_BSSID_MASK(bssid_mask) \ ((bssid_mask)[0] &= ~(((ATH_BCBUF-1)<<2)|0x02)) /* VAP configuration (from protocol layer) */ struct ath_vap_config { u32 av_fixed_rateset; u32 av_fixed_retryset; }; /* driver-specific vap state */ struct ath_vap { struct ieee80211_vif *av_if_data; /* interface(vap) instance from 802.11 protocal layer */ enum ath9k_opmode av_opmode; /* VAP operational mode */ struct ath_buf *av_bcbuf; /* beacon buffer */ struct ath_beacon_offset av_boff; /* dynamic update state */ struct ath_tx_control av_btxctl; /* tx control information for beacon */ int av_bslot; /* beacon slot index */ struct ath_txq av_mcastq; /* multicast transmit queue */ struct ath_vap_config av_config; /* vap configuration parameters from 802.11 protocol layer*/ struct ath_rate_node *rc_node; }; int ath_vap_attach(struct ath_softc *sc, int if_id, struct ieee80211_vif *if_data, enum ath9k_opmode opmode); int ath_vap_detach(struct ath_softc *sc, int if_id); int ath_vap_config(struct ath_softc *sc, int if_id, struct ath_vap_config *if_config); int ath_vap_listen(struct ath_softc *sc, int if_id); /*********************/ /* Antenna diversity */ /*********************/ #define ATH_ANT_DIV_MAX_CFG 2 #define ATH_ANT_DIV_MIN_IDLE_US 1000000 /* us */ #define ATH_ANT_DIV_MIN_SCAN_US 50000 /* us */ enum ATH_ANT_DIV_STATE{ ATH_ANT_DIV_IDLE, ATH_ANT_DIV_SCAN, /* evaluating antenna */ }; struct ath_antdiv { struct ath_softc *antdiv_sc; u8 antdiv_start; enum ATH_ANT_DIV_STATE antdiv_state; u8 antdiv_num_antcfg; u8 antdiv_curcfg; u8 antdiv_bestcfg; int32_t antdivf_rssitrig; int32_t antdiv_lastbrssi[ATH_ANT_DIV_MAX_CFG]; u64 antdiv_lastbtsf[ATH_ANT_DIV_MAX_CFG]; u64 antdiv_laststatetsf; u8 antdiv_bssid[ETH_ALEN]; }; void ath_slow_ant_div_init(struct ath_antdiv *antdiv, struct ath_softc *sc, int32_t rssitrig); void ath_slow_ant_div_start(struct ath_antdiv *antdiv, u8 num_antcfg, const u8 *bssid); void ath_slow_ant_div_stop(struct ath_antdiv *antdiv); void ath_slow_ant_div(struct ath_antdiv *antdiv, struct ieee80211_hdr *wh, struct ath_rx_status *rx_stats); void ath_setdefantenna(void *sc, u32 antenna); /********************/ /* Main driver core */ /********************/ /* * Default cache line size, in bytes. * Used when PCI device not fully initialized by bootrom/BIOS */ #define DEFAULT_CACHELINE 32 #define ATH_DEFAULT_NOISE_FLOOR -95 #define ATH_REGCLASSIDS_MAX 10 #define ATH_CABQ_READY_TIME 80 /* % of beacon interval */ #define ATH_PREAMBLE_SHORT (1<<0) #define ATH_PROTECT_ENABLE (1<<1) #define ATH_MAX_SW_RETRIES 10 /* Num farmes difference in tx to flip default recv */ #define ATH_ANTENNA_DIFF 2 #define ATH_CHAN_MAX 255 #define IEEE80211_WEP_NKID 4 /* number of key ids */ #define IEEE80211_RATE_VAL 0x7f /* * The key cache is used for h/w cipher state and also for * tracking station state such as the current tx antenna. * We also setup a mapping table between key cache slot indices * and station state to short-circuit node lookups on rx. * Different parts have different size key caches. We handle * up to ATH_KEYMAX entries (could dynamically allocate state). */ #define ATH_KEYMAX 128 /* max key cache size we handle */ #define RESET_RETRY_TXQ 0x00000001 #define ATH_IF_ID_ANY 0xff #define ATH_TXPOWER_MAX 100 /* .5 dBm units */ #define RSSI_LPF_THRESHOLD -20 #define ATH_RSSI_EP_MULTIPLIER (1<<7) /* pow2 to optimize out * and / */ #define ATH_RATE_DUMMY_MARKER 0 #define ATH_RSSI_LPF_LEN 10 #define ATH_RSSI_DUMMY_MARKER 0x127 #define ATH_EP_MUL(x, mul) ((x) * (mul)) #define ATH_EP_RND(x, mul) \ ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) #define ATH_RSSI_OUT(x) \ (((x) != ATH_RSSI_DUMMY_MARKER) ? \ (ATH_EP_RND((x), ATH_RSSI_EP_MULTIPLIER)) : ATH_RSSI_DUMMY_MARKER) #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) enum PROT_MODE { PROT_M_NONE = 0, PROT_M_RTSCTS, PROT_M_CTSONLY }; enum RATE_TYPE { NORMAL_RATE = 0, HALF_RATE, QUARTER_RATE }; struct ath_ht_info { enum ath9k_ht_macmode tx_chan_width; u16 maxampdu; u8 mpdudensity; u8 ext_chan_offset; }; struct ath_softc { struct ieee80211_hw *hw; /* mac80211 instance */ struct pci_dev *pdev; /* Bus handle */ void __iomem *mem; /* address of the device */ struct tasklet_struct intr_tq; /* General tasklet */ struct tasklet_struct bcon_tasklet; /* Beacon tasklet */ struct ath_config sc_config; /* per-instance load-time parameters */ int sc_debug; /* Debug masks */ struct ath_hal *sc_ah; /* HAL Instance */ struct ath_rate_softc *sc_rc; /* tx rate control support */ u32 sc_intrstatus; /* HAL_STATUS */ enum ath9k_opmode sc_opmode; /* current operating mode */ /* Properties, Config */ u8 sc_invalid; /* being detached */ u8 sc_beacons; /* beacons running */ u8 sc_scanning; /* scanning active */ u8 sc_txaggr; /* enable 11n tx aggregation */ u8 sc_rxaggr; /* enable 11n rx aggregation */ u8 sc_update_chainmask; /* change chain mask */ u8 sc_full_reset; /* force full reset */ enum wireless_mode sc_curmode; /* current phy mode */ u16 sc_curtxpow; /* current tx power limit */ u16 sc_curaid; /* current association id */ u8 sc_curbssid[ETH_ALEN]; u8 sc_myaddr[ETH_ALEN]; enum PROT_MODE sc_protmode; /* protection mode */ u8 sc_mcastantenna;/* Multicast antenna number */ u8 sc_txantenna; /* data tx antenna (fixed or auto) */ u8 sc_nbcnvaps; /* # of vaps sending beacons */ u16 sc_nvaps; /* # of active virtual ap's */ struct ath_vap *sc_vaps[ATH_BCBUF]; /* interface id to avp map */ enum ath9k_int sc_imask; /* interrupt mask copy */ u8 sc_bssidmask[ETH_ALEN]; u8 sc_defant; /* current default antenna */ u8 sc_rxotherant; /* rx's on non-default antenna*/ u16 sc_cachelsz; /* cache line size */ int sc_slotupdate; /* slot to next advance fsm */ int sc_slottime; /* slot time */ u8 sc_noreset; int sc_bslot[ATH_BCBUF];/* beacon xmit slots */ struct ath9k_node_stats sc_halstats; /* station-mode rssi stats */ struct list_head node_list; struct ath_ht_info sc_ht_info; int16_t sc_noise_floor; /* signal noise floor in dBm */ enum ath9k_ht_extprotspacing sc_ht_extprotspacing; u8 sc_tx_chainmask; u8 sc_rx_chainmask; u8 sc_rxchaindetect_ref; u8 sc_rxchaindetect_thresh5GHz; u8 sc_rxchaindetect_thresh2GHz; u8 sc_rxchaindetect_delta5GHz; u8 sc_rxchaindetect_delta2GHz; u32 sc_rtsaggrlimit; /* Chipset specific aggr limit */ u32 sc_flags; #ifdef CONFIG_SLOW_ANT_DIV /* Slow antenna diversity */ struct ath_antdiv sc_antdiv; #endif enum { OK, /* no change needed */ UPDATE, /* update pending */ COMMIT /* beacon sent, commit change */ } sc_updateslot; /* slot time update fsm */ /* Crypto */ u32 sc_keymax; /* size of key cache */ DECLARE_BITMAP (sc_keymap, ATH_KEYMAX);/* key use bit map */ u8 sc_splitmic; /* split TKIP MIC keys */ int sc_keytype; /* type of the key being used */ /* RX */ struct list_head sc_rxbuf; /* receive buffer */ struct ath_descdma sc_rxdma; /* RX descriptors */ int sc_rxbufsize; /* rx size based on mtu */ u32 *sc_rxlink; /* link ptr in last RX desc */ u32 sc_rxflush; /* rx flush in progress */ u64 sc_lastrx; /* tsf of last rx'd frame */ /* TX */ struct list_head sc_txbuf; /* transmit buffer */ struct ath_txq sc_txq[ATH9K_NUM_TX_QUEUES]; struct ath_descdma sc_txdma; /* TX descriptors */ u32 sc_txqsetup; /* h/w queues setup */ u32 sc_txintrperiod;/* tx interrupt batching */ int sc_haltype2q[ATH9K_WME_AC_VO+1]; /* HAL WME AC -> h/w qnum */ u32 sc_ant_tx[8]; /* recent tx frames/antenna */ /* Beacon */ struct ath9k_txq_info sc_beacon_qi; /* adhoc only: beacon queue parameters */ struct ath_descdma sc_bdma; /* beacon descriptors */ struct ath_txq *sc_cabq; /* tx q for cab frames */ struct list_head sc_bbuf; /* beacon buffers */ u32 sc_bhalq; /* HAL q for outgoing beacons */ u32 sc_bmisscount; /* missed beacon transmits */ u32 ast_be_xmit; /* beacons transmitted */ /* Rate */ struct ieee80211_rate rates[IEEE80211_NUM_BANDS][ATH_RATE_MAX]; const struct ath9k_rate_table *sc_rates[WIRELESS_MODE_MAX]; const struct ath9k_rate_table *sc_currates; /* current rate table */ u8 sc_rixmap[256]; /* IEEE to h/w rate table ix */ u8 sc_minrateix; /* min h/w rate index */ u8 sc_protrix; /* protection rate index */ struct { u32 rateKbps; /* transfer rate in kbs */ u8 ieeerate; /* IEEE rate */ } sc_hwmap[256]; /* h/w rate ix mappings */ /* Channel, Band */ struct ieee80211_channel channels[IEEE80211_NUM_BANDS][ATH_CHAN_MAX]; struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS]; struct ath9k_channel sc_curchan; /* current h/w channel */ /* Locks */ spinlock_t sc_rxflushlock; /* lock of RX flush */ spinlock_t sc_rxbuflock; /* rxbuf lock */ spinlock_t sc_txbuflock; /* txbuf lock */ spinlock_t sc_resetlock; spinlock_t node_lock; }; int ath_init(u16 devid, struct ath_softc *sc); void ath_deinit(struct ath_softc *sc); int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan); int ath_suspend(struct ath_softc *sc); irqreturn_t ath_isr(int irq, void *dev); int ath_reset(struct ath_softc *sc); void ath_scan_start(struct ath_softc *sc); void ath_scan_end(struct ath_softc *sc); int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan); void ath_setup_rate(struct ath_softc *sc, enum wireless_mode wMode, enum RATE_TYPE type, const struct ath9k_rate_table *rt); /*********************/ /* Utility Functions */ /*********************/ void ath_key_reset(struct ath_softc *sc, u16 keyix, int freeslot); int ath_keyset(struct ath_softc *sc, u16 keyix, struct ath9k_keyval *hk, const u8 mac[ETH_ALEN]); int ath_get_hal_qnum(u16 queue, struct ath_softc *sc); int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc); void ath_setslottime(struct ath_softc *sc); void ath_update_txpow(struct ath_softc *sc); int ath_cabq_update(struct ath_softc *); void ath_get_currentCountry(struct ath_softc *sc, struct ath9k_country_entry *ctry); u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp); void ath_internal_reset(struct ath_softc *sc); u32 ath_chan2flags(struct ieee80211_channel *chan, struct ath_softc *sc); dma_addr_t ath_skb_map_single(struct ath_softc *sc, struct sk_buff *skb, int direction, dma_addr_t *pa); void ath_skb_unmap_single(struct ath_softc *sc, struct sk_buff *skb, int direction, dma_addr_t *pa); void ath_mcast_merge(struct ath_softc *sc, u32 mfilt[2]); enum ath9k_ht_macmode ath_cwm_macmode(struct ath_softc *sc); #endif /* CORE_H */