[net-next-2.6.git] / drivers / net / wireless / ath / ath9k / common.h

/*
 * 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"
#include "hw-ops.h"

/* Common header for Atheros 802.11n base driver cores */

#define IEEE80211_WEP_NKID 4

#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 */
	void *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;
	bool bf_isnullfunc;
	bool bf_tx_aborted;
	u16 bf_flags;
	struct ath_buf_state bf_state;
	dma_addr_t bf_dmacontext;
	struct ath_wiphy *aphy;
};

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);

int ath9k_cmn_padpos(__le16 frame_control);
int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
			       struct ath9k_channel *ichan);
struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
					       struct ath_hw *ah);
int ath9k_cmn_key_config(struct ath_common *common,
			 struct ieee80211_vif *vif,
			 struct ieee80211_sta *sta,
			 struct ieee80211_key_conf *key);
void ath9k_cmn_key_delete(struct ath_common *common,
			  struct ieee80211_key_conf *key);
Commit	Line	Data
db86f07e LR	1	/*
	2	* Copyright (c) 2009 Atheros Communications Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	#include <net/mac80211.h>
	18
	19	#include "../ath.h"
	20	#include "../debug.h"
	21
	22	#include "hw.h"
d70357d5	23	#include "hw-ops.h"
db86f07e LR	24
	25	/* Common header for Atheros 802.11n base driver cores */
	26
fb9987d0 S	27	#define IEEE80211_WEP_NKID 4
fb9987d0 S	28
db86f07e LR	29	#define WME_NUM_TID 16
	30	#define WME_BA_BMP_SIZE 64
	31	#define WME_MAX_BA WME_BA_BMP_SIZE
	32	#define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
	33
	34	#define WME_AC_BE 0
	35	#define WME_AC_BK 1
	36	#define WME_AC_VI 2
	37	#define WME_AC_VO 3
	38	#define WME_NUM_AC 4
	39
	40	#define ATH_RSSI_DUMMY_MARKER 0x127
	41	#define ATH_RSSI_LPF_LEN 10
	42	#define RSSI_LPF_THRESHOLD -20
	43	#define ATH_RSSI_EP_MULTIPLIER (1<<7)
	44	#define ATH_EP_MUL(x, mul) ((x) * (mul))
	45	#define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
	46	#define ATH_LPF_RSSI(x, y, len) \
	47	((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
	48	#define ATH_RSSI_LPF(x, y) do { \
	49	if ((y) >= RSSI_LPF_THRESHOLD) \
	50	x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \
	51	} while (0)
	52	#define ATH_EP_RND(x, mul) \
	53	((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
	54
	55	struct ath_atx_ac {
	56	int sched;
	57	int qnum;
	58	struct list_head list;
	59	struct list_head tid_q;
	60	};
	61
	62	struct ath_buf_state {
	63	int bfs_nframes;
	64	u16 bfs_al;
	65	u16 bfs_frmlen;
	66	int bfs_seqno;
	67	int bfs_tidno;
	68	int bfs_retries;
	69	u8 bf_type;
	70	u32 bfs_keyix;
	71	enum ath9k_key_type bfs_keytype;
	72	};
	73
	74	struct ath_buf {
	75	struct list_head list;
	76	struct ath_buf bf_lastbf; / last buf of this unit (a frame or
	77	an aggregate) */
	78	struct ath_buf bf_next; / next subframe in the aggregate */
	79	struct sk_buff bf_mpdu; / enclosing frame structure */
c38d4d2e	80	void bf_desc; / virtual addr of desc */
db86f07e LR	81	dma_addr_t bf_daddr; /* physical addr of desc */
	82	dma_addr_t bf_buf_addr; /* physical addr of data buffer */
	83	bool bf_stale;
e7824a50	84	bool bf_isnullfunc;
6d913f7d	85	bool bf_tx_aborted;
db86f07e LR	86	u16 bf_flags;
	87	struct ath_buf_state bf_state;
	88	dma_addr_t bf_dmacontext;
827e69bf	89	struct ath_wiphy *aphy;
db86f07e LR	90	};
	91
	92	struct ath_atx_tid {
	93	struct list_head list;
	94	struct list_head buf_q;
	95	struct ath_node *an;
	96	struct ath_atx_ac *ac;
	97	struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];
	98	u16 seq_start;
	99	u16 seq_next;
	100	u16 baw_size;
	101	int tidno;
	102	int baw_head; /* first un-acked tx buffer */
	103	int baw_tail; /* next unused tx buffer slot */
	104	int sched;
	105	int paused;
	106	u8 state;
	107	};
	108
	109	struct ath_node {
	110	struct ath_common *common;
	111	struct ath_atx_tid tid[WME_NUM_TID];
	112	struct ath_atx_ac ac[WME_NUM_AC];
	113	u16 maxampdu;
	114	u8 mpdudensity;
	115	int last_rssi;
	116	};
	117
	118	int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
	119	struct ieee80211_hw *hw,
	120	struct sk_buff *skb,
	121	struct ath_rx_status *rx_stats,
	122	struct ieee80211_rx_status *rx_status,
	123	bool *decrypt_error);
	124
	125	void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
	126	struct sk_buff *skb,
	127	struct ath_rx_status *rx_stats,
	128	struct ieee80211_rx_status *rxs,
	129	bool decrypt_error);
1bc14880 BP	130
1bc14880 BP	131	int ath9k_cmn_padpos(__le16 frame_control);
fb9987d0	132	int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
fb9987d0 S	133	void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
	134	struct ath9k_channel *ichan);
	135	struct ath9k_channel ath9k_cmn_get_curchannel(struct ieee80211_hw hw,
	136	struct ath_hw *ah);
	137	int ath9k_cmn_key_config(struct ath_common *common,
	138	struct ieee80211_vif *vif,
	139	struct ieee80211_sta *sta,
	140	struct ieee80211_key_conf *key);
	141	void ath9k_cmn_key_delete(struct ath_common *common,
	142	struct ieee80211_key_conf *key);