path: root/drivers/net/wireless/ath/ath9k/htc.h

/*
 * Copyright (c) 2010 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 HTC_H
#define HTC_H

#include <linux/module.h>
#include <linux/usb.h>
#include <linux/firmware.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <net/mac80211.h>

#include "common.h"
#include "htc_hst.h"
#include "hif_usb.h"
#include "wmi.h"

#define ATH_STA_SHORT_CALINTERVAL 1000    /* 1 second */
#define ATH_AP_SHORT_CALINTERVAL  100     /* 100 ms */
#define ATH_ANI_POLLINTERVAL      100     /* 100 ms */
#define ATH_LONG_CALINTERVAL      30000   /* 30 seconds */
#define ATH_RESTART_CALINTERVAL   1200000 /* 20 minutes */

#define ATH_DEFAULT_BMISS_LIMIT 10
#define IEEE80211_MS_TO_TU(x)   (((x) * 1000) / 1024)
#define TSF_TO_TU(_h, _l) \
	((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))

extern struct ieee80211_ops ath9k_htc_ops;
extern int htc_modparam_nohwcrypt;

enum htc_phymode {
	HTC_MODE_AUTO		= 0,
	HTC_MODE_11A		= 1,
	HTC_MODE_11B		= 2,
	HTC_MODE_11G		= 3,
	HTC_MODE_FH		= 4,
	HTC_MODE_TURBO_A	= 5,
	HTC_MODE_TURBO_G	= 6,
	HTC_MODE_11NA		= 7,
	HTC_MODE_11NG		= 8
};

enum htc_opmode {
	HTC_M_STA	= 1,
	HTC_M_IBSS	= 0,
	HTC_M_AHDEMO	= 3,
	HTC_M_HOSTAP	= 6,
	HTC_M_MONITOR	= 8,
	HTC_M_WDS	= 2
};

#define ATH9K_HTC_HDRSPACE sizeof(struct htc_frame_hdr)

#define ATH9K_HTC_AMPDU  1
#define ATH9K_HTC_NORMAL 2
#define ATH9K_HTC_BEACON 3
#define ATH9K_HTC_MGMT   4

#define ATH9K_HTC_TX_CTSONLY      0x1
#define ATH9K_HTC_TX_RTSCTS       0x2
#define ATH9K_HTC_TX_USE_MIN_RATE 0x100

struct tx_frame_hdr {
	u8 data_type;
	u8 node_idx;
	u8 vif_idx;
	u8 tidno;
	__be32 flags; /* ATH9K_HTC_TX_* */
	u8 key_type;
	u8 keyix;
	u8 cookie;
	u8 pad;
} __packed;

struct tx_mgmt_hdr {
	u8 node_idx;
	u8 vif_idx;
	u8 tidno;
	u8 flags;
	u8 key_type;
	u8 keyix;
	u8 cookie;
	u8 pad;
} __packed;

struct tx_beacon_header {
	u8 vif_index;
	u8 len_changed;
	u16 rev;
} __packed;

struct ath9k_htc_cap_target {
	u32 flags;
	u32 flags_ext;
	u32 ampdu_limit;
	u8 ampdu_subframes;
	u8 tx_chainmask;
	u8 tx_chainmask_legacy;
	u8 rtscts_ratecode;
	u8 protmode;
	u8 pad;
} __packed;

struct ath9k_htc_target_vif {
	u8 index;
	u8 opmode;
	u8 myaddr[ETH_ALEN];
	u8 ath_cap;
	__be16 rtsthreshold;
	u8 pad;
} __packed;

#define ATH_HTC_STA_AUTH  0x0001
#define ATH_HTC_STA_QOS   0x0002
#define ATH_HTC_STA_ERP   0x0004
#define ATH_HTC_STA_HT    0x0008

struct ath9k_htc_target_sta {
	u8 macaddr[ETH_ALEN];
	u8 bssid[ETH_ALEN];
	u8 sta_index;
	u8 vif_index;
	u8 is_vif_sta;
	__be16 flags; /* ATH_HTC_STA_* */
	__be16 htcap;
	__be16 maxampdu;
	u8 pad;
} __packed;

struct ath9k_htc_target_aggr {
	u8 sta_index;
	u8 tidno;
	u8 aggr_enable;
	u8 padding;
} __packed;

#define ATH_HTC_RATE_MAX 30

#define WLAN_RC_DS_FLAG  0x01
#define WLAN_RC_40_FLAG  0x02
#define WLAN_RC_SGI_FLAG 0x04
#define WLAN_RC_HT_FLAG  0x08

struct ath9k_htc_rateset {
	u8 rs_nrates;
	u8 rs_rates[ATH_HTC_RATE_MAX];
};

struct ath9k_htc_rate {
	struct ath9k_htc_rateset legacy_rates;
	struct ath9k_htc_rateset ht_rates;
} __packed;

struct ath9k_htc_target_rate {
	u8 sta_index;
	u8 isnew;
	__be32 capflags;
	struct ath9k_htc_rate rates;
};

struct ath9k_htc_target_stats {
	__be32 tx_shortretry;
	__be32 tx_longretry;
	__be32 tx_xretries;
	__be32 ht_txunaggr_xretry;
	__be32 ht_tx_xretries;
} __packed;

#define ATH9K_HTC_MAX_VIF 2
#define ATH9K_HTC_MAX_BCN_VIF 2

#define INC_VIF(_priv, _type) do {		\
		switch (_type) {		\
		case NL80211_IFTYPE_STATION:	\
			_priv->num_sta_vif++;	\
			break;			\
		case NL80211_IFTYPE_ADHOC:	\
			_priv->num_ibss_vif++;	\
			break;			\
		case NL80211_IFTYPE_AP:		\
			_priv->num_ap_vif++;	\
			break;			\
		default:			\
			break;			\
		}				\
	} while (0)

#define DEC_VIF(_priv, _type) do {		\
		switch (_type) {		\
		case NL80211_IFTYPE_STATION:	\
			_priv->num_sta_vif--;	\
			break;			\
		case NL80211_IFTYPE_ADHOC:	\
			_priv->num_ibss_vif--;	\
			break;			\
		case NL80211_IFTYPE_AP:		\
			_priv->num_ap_vif--;	\
			break;			\
		default:			\
			break;			\
		}				\
	} while (0)

struct ath9k_htc_vif {
	u8 index;
	u16 seq_no;
	bool beacon_configured;
	int bslot;
	__le64 tsfadjust;
};

struct ath9k_vif_iter_data {
	const u8 *hw_macaddr;
	u8 mask[ETH_ALEN];
};

#define ATH9K_HTC_MAX_STA 8
#define ATH9K_HTC_MAX_TID 8

enum tid_aggr_state {
	AGGR_STOP = 0,
	AGGR_PROGRESS,
	AGGR_START,
	AGGR_OPERATIONAL
};

struct ath9k_htc_sta {
	u8 index;
	enum tid_aggr_state tid_state[ATH9K_HTC_MAX_TID];
};

#define ATH9K_HTC_RXBUF 256
#define HTC_RX_FRAME_HEADER_SIZE 40

struct ath9k_htc_rxbuf {
	bool in_process;
	struct sk_buff *skb;
	struct ath_htc_rx_status rxstatus;
	struct list_head list;
};

struct ath9k_htc_rx {
	int last_rssi; /* FIXME: per-STA */
	struct list_head rxbuf;
	spinlock_t rxbuflock;
};

#define ATH9K_HTC_TX_RESERVE   10
#define ATH9K_HTC_TX_THRESHOLD (MAX_TX_BUF_NUM - ATH9K_HTC_TX_RESERVE)

#define ATH9K_HTC_OP_TX_QUEUES_STOP BIT(0)
#define ATH9K_HTC_OP_TX_DRAIN       BIT(1)

struct ath9k_htc_tx {
	u8 flags;
	int queued_cnt;
	struct sk_buff_head mgmt_ep_queue;
	struct sk_buff_head cab_ep_queue;
	struct sk_buff_head data_be_queue;
	struct sk_buff_head data_bk_queue;
	struct sk_buff_head data_vi_queue;
	struct sk_buff_head data_vo_queue;
	struct sk_buff_head tx_failed;
	DECLARE_BITMAP(tx_slot, MAX_TX_BUF_NUM);
	spinlock_t tx_lock;
};

struct ath9k_htc_tx_ctl {
	u8 type; /* ATH9K_HTC_* */
	u8 epid;
	u8 txok;
	u8 sta_idx;
};

static inline struct ath9k_htc_tx_ctl *HTC_SKB_CB(struct sk_buff *skb)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);

	BUILD_BUG_ON(sizeof(struct ath9k_htc_tx_ctl) >
		     IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
	return (struct ath9k_htc_tx_ctl *) &tx_info->driver_data;
}

#ifdef CONFIG_ATH9K_HTC_DEBUGFS

#define TX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.tx_stats.c++)
#define RX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.rx_stats.c++)
#define CAB_STAT_INC   priv->debug.tx_stats.cab_queued++

#define TX_QSTAT_INC(q) (priv->debug.tx_stats.queue_stats[q]++)

void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv,
			   struct ath_htc_rx_status *rxs);

struct ath_tx_stats {
	u32 buf_queued;
	u32 buf_completed;
	u32 skb_queued;
	u32 skb_success;
	u32 skb_failed;
	u32 cab_queued;
	u32 queue_stats[WME_NUM_AC];
};

struct ath_rx_stats {
	u32 skb_allocated;
	u32 skb_completed;
	u32 skb_dropped;
	u32 err_crc;
	u32 err_decrypt_crc;
	u32 err_mic;
	u32 err_pre_delim;
	u32 err_post_delim;
	u32 err_decrypt_busy;
	u32 err_phy;
	u32 err_phy_stats[ATH9K_PHYERR_MAX];
};

struct ath9k_debug {
	struct dentry *debugfs_phy;
	struct dentry *debugfs_tgt_stats;
	struct dentry *debugfs_xmit;
	struct dentry *debugfs_recv;
	struct dentry *debugfs_slot;
	struct dentry *debugfs_queue;
	struct ath_tx_stats tx_stats;
	struct ath_rx_stats rx_stats;
	u32 txrate;
};

#else

#define TX_STAT_INC(c) do { } while (0)
#define RX_STAT_INC(c) do { } while (0)
#define CAB_STAT_INC   do { } while (0)

#define TX_QSTAT_INC(c) do { } while (0)

static inline void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv,
					 struct ath_htc_rx_status *rxs