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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:15:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-08 11:15:23 -0700
commitf2d7499be1b1fe1cd8a5e6a01c1f44173894a241 (patch)
tree64d341a90d8cb831a5097e365d303367906f1373 /drivers/net/wireless/ath9k/core.h
parent8d659f5e43c5db2630e85f507b7384365e9e1c1e (diff)
parent76aab2c1eae491a5d73ac83deec97dd28ebac584 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (99 commits) pkt_sched: Fix actions referencing bnx2x: fix logical op tcp: (whitespace only) fix confusing indentation pkt_sched: Fix qdisc config when link is down. [Bluetooth] Add full quirk implementation for btusb driver [Bluetooth] Removal of unnecessary ignore module parameter [Bluetooth] Add parameters to control BNEP header compression ath9k: Revamp wireless mode usage ath9k: More unused macros ath9k: Remove a few unused macros and fix indentation ath9k: Use mac80211's band macros and remove enum hal_freq_band ath9k: Remove redundant data structure ath9k_txq_info ath9k: Cleanup data structures related to HW capabilities ath9k: work around gcc ICEs ath9k: Add new Atheros IEEE 802.11n driver ath5k: remove Atheros 11n devices from supported list list.h: add list_cut_position() list.h: Add list_splice_tail() and list_splice_tail_init() p54: swap short slot time dcf values rt2x00: Block all unsupported modes ...
Diffstat (limited to 'drivers/net/wireless/ath9k/core.h')
-rw-r--r--drivers/net/wireless/ath9k/core.h1072
1 files changed, 1072 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
new file mode 100644
index 00000000000..673b3d81133
--- /dev/null
+++ b/drivers/net/wireless/ath9k/core.h
@@ -0,0 +1,1072 @@
+/*
+ * 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 <linux/version.h>
+#include <linux/autoconf.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/in.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <asm/byteorder.h>
+#include <linux/scatterlist.h>
+#include <asm/page.h>
+#include <net/mac80211.h>
+
+#include "ath9k.h"
+#include "rc.h"
+
+struct ath_node;
+
+/******************/
+/* Utility macros */
+/******************/
+
+/* 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<<i))
+
+static inline unsigned long get_timestamp(void)
+{
+ return ((jiffies / HZ) * 1000) + (jiffies % HZ) * (1000 / HZ);
+}
+
+/*************/
+/* Debugging */
+/*************/
+
+enum ATH_DEBUG {
+ ATH_DBG_RESET = 0x00000001,
+ ATH_DBG_PHY_IO = 0x00000002,
+ ATH_DBG_REG_IO = 0x00000004,
+ ATH_DBG_QUEUE = 0x00000008,
+ ATH_DBG_EEPROM = 0x00000010,
+ ATH_DBG_NF_CAL = 0x00000020,
+ ATH_DBG_CALIBRATE = 0x00000040,
+ ATH_DBG_CHANNEL = 0x00000080,
+ ATH_DBG_INTERRUPT = 0x00000100,
+ ATH_DBG_REGULATORY = 0x00000200,
+ ATH_DBG_ANI = 0x00000400,
+ ATH_DBG_POWER_MGMT = 0x00000800,
+ ATH_DBG_XMIT = 0x00001000,
+ ATH_DBG_BEACON = 0x00002000,
+ ATH_DBG_RATE = 0x00004000,
+ ATH_DBG_CONFIG = 0x00008000,
+ ATH_DBG_KEYCACHE = 0x00010000,
+ ATH_DBG_AGGR = 0x00020000,
+ ATH_DBG_FATAL = 0x00040000,
+ ATH_DBG_ANY = 0xffffffff
+};
+
+#define DBG_DEFAULT (ATH_DBG_FATAL)
+
+#define DPRINTF(sc, _m, _fmt, ...) do { \
+ if (sc->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;
+ 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;
+ struct ath_rxbuf *rxbuf; /* re-ordering buffer */
+ struct timer_list timer;
+ spinlock_t tidlock;
+ 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;
+ 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 */
+
+ /* count to determine if descriptor should generate int on this txq. */
+ u32 axq_intrcnt;
+
+ bool stopped; /* Is mac80211 queue stopped ? */
+ struct ath_buf *axq_linkbuf; /* virtual addr of last buffer*/
+
+ /* first desc of the last descriptor that contains CTS */
+ struct ath_desc *axq_lastdsWithCTS;
+
+ /* final desc of the gating desc that determines whether
+ lastdsWithCTS has been DMA'ed or not */
+ struct ath_desc *axq_gatingds;
+
+ 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;
+ struct ath_atx_ac *ac;
+ struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; /* active tx frames */
+ 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;
+ int cleanup_inprogress;
+ u32 addba_exchangecomplete:1;
+ 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;
+ int if_id;
+ int qnum;
+ u32 ht:1;
+ u32 ps:1;
+ u32 use_minrate:1;
+ enum ath9k_pkt_type atype;
+ enum ath9k_key_type keytype;
+ u32 flags;
+ u16 seqno;
+ u16 tidno;
+ u16 txpower;
+ u16 frmlen;
+ u32 keyix;
+ int min_rate;
+ int mcast_rate;
+ u16 nextfraglen;
+ struct ath_softc *dev;
+ 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_tx_queue_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;
+ atomic_t an_refcnt;
+ struct ath_chainmask_sel an_chainmask_sel;
+ struct ath_node_aggr an_aggr;
+ 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 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;
+ 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; /* txctl 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*/
+ 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;
+ struct pci_dev *pdev;
+ void __iomem *mem;
+ struct tasklet_struct intr_tq;
+ struct tasklet_struct bcon_tasklet;
+ struct ath_config sc_config; /* load-time parameters */
+ int sc_debug;
+ struct ath_hal *sc_ah;
+ struct ath_rate_softc *sc_rc; /* tx rate control support */
+ u32 sc_intrstatus;
+ enum ath9k_opmode sc_opmode; /* current operating mode */
+
+ 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;
+ u16 sc_curaid;
+ u8 sc_curbssid[ETH_ALEN];
+ u8 sc_myaddr[ETH_ALEN];
+ enum PROT_MODE sc_protmode;
+ u8 sc_mcastantenna;
+ 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];
+ enum ath9k_int sc_imask;
+ u8 sc_bssidmask[ETH_ALEN];
+ u8 sc_defant; /* current default antenna */
+ u8 sc_rxotherant; /* rx's on non-default antenna */
+ u16 sc_cachelsz;
+ int sc_slotupdate; /* slot to next advance fsm */
+ int sc_slottime;
+ u8 sc_noreset;
+ int sc_bslot[ATH_BCBUF];
+ 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
+ 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;
+
+ /* RX */
+ struct list_head sc_rxbuf;
+ struct ath_descdma sc_rxdma;
+ 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;
+ struct ath_txq sc_txq[ATH9K_NUM_TX_QUEUES];
+ struct ath_descdma sc_txdma;
+ u32 sc_txqsetup;
+ 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_tx_queue_info sc_beacon_qi;
+ struct ath_descdma sc_bdma;
+ struct ath_txq *sc_cabq;
+ struct list_head sc_bbuf;
+ u32 sc_bhalq;
+ u32 sc_bmisscount;
+ u32 ast_be_xmit; /* beacons transmitted */
+
+ /* Rate */
+ struct ieee80211_rate rates[IEEE80211_NUM_BANDS][ATH_RATE_MAX];
+ const struct ath9k_rate_table *sc_currates;
+ u8 sc_rixmap[256]; /* IEEE to h/w rate table ix */
+ 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;
+
+ /* Locks */
+ spinlock_t sc_rxflushlock;
+ spinlock_t sc_rxbuflock;
+ spinlock_t sc_txbuflock;
+ 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 */