Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...

[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-dev.h

/******************************************************************************
 *
 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
/*
 * Please use this file (iwl-dev.h) for driver implementation definitions.
 * Please use iwl-commands.h for uCode API definitions.
 */

#ifndef __iwl_dev_h__
#define __iwl_dev_h__

#include <linux/interrupt.h>
#include <linux/pci.h> /* for struct pci_device_id */
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/leds.h>
#include <net/ieee80211_radiotap.h>

#include "iwl-eeprom.h"
#include "iwl-csr.h"
#include "iwl-prph.h"
#include "iwl-fh.h"
#include "iwl-debug.h"
#include "iwl-agn-hw.h"
#include "iwl-led.h"
#include "iwl-power.h"
#include "iwl-agn-rs.h"
#include "iwl-agn-tt.h"

#define DRV_NAME        "iwlagn"

struct iwl_tx_queue;

/* CT-KILL constants */
#define CT_KILL_THRESHOLD_LEGACY   110 /* in Celsius */
#define CT_KILL_THRESHOLD          114 /* in Celsius */
#define CT_KILL_EXIT_THRESHOLD     95  /* in Celsius */

/* Default noise level to report when noise measurement is not available.
 *   This may be because we're:
 *   1)  Not associated (4965, no beacon statistics being sent to driver)
 *   2)  Scanning (noise measurement does not apply to associated channel)
 *   3)  Receiving CCK (3945 delivers noise info only for OFDM frames)
 * Use default noise value of -127 ... this is below the range of measurable
 *   Rx dBm for either 3945 or 4965, so it can indicate "unmeasurable" to user.
 *   Also, -127 works better than 0 when averaging frames with/without
 *   noise info (e.g. averaging might be done in app); measured dBm values are
 *   always negative ... using a negative value as the default keeps all
 *   averages within an s8's (used in some apps) range of negative values. */
#define IWL_NOISE_MEAS_NOT_AVAILABLE (-127)

/*
 * RTS threshold here is total size [2347] minus 4 FCS bytes
 * Per spec:
 *   a value of 0 means RTS on all data/management packets
 *   a value > max MSDU size means no RTS
 * else RTS for data/management frames where MPDU is larger
 *   than RTS value.
 */
#define DEFAULT_RTS_THRESHOLD     2347U
#define MIN_RTS_THRESHOLD         0U
#define MAX_RTS_THRESHOLD         2347U
#define MAX_MSDU_SIZE             2304U
#define MAX_MPDU_SIZE             2346U
#define DEFAULT_BEACON_INTERVAL   200U
#define DEFAULT_SHORT_RETRY_LIMIT 7U
#define DEFAULT_LONG_RETRY_LIMIT  4U

struct iwl_rx_mem_buffer {
        dma_addr_t page_dma;
        struct page *page;
        struct list_head list;
};

#define rxb_addr(r) page_address(r->page)

/* defined below */
struct iwl_device_cmd;

struct iwl_cmd_meta {
        /* only for SYNC commands, iff the reply skb is wanted */
        struct iwl_host_cmd *source;
        /*
         * only for ASYNC commands
         * (which is somewhat stupid -- look at iwl-sta.c for instance
         * which duplicates a bunch of code because the callback isn't
         * invoked for SYNC commands, if it were and its result passed
         * through it would be simpler...)
         */
        void (*callback)(struct iwl_priv *priv,
                         struct iwl_device_cmd *cmd,
                         struct iwl_rx_packet *pkt);

        u32 flags;

        DEFINE_DMA_UNMAP_ADDR(mapping);
        DEFINE_DMA_UNMAP_LEN(len);
};

/*
 * Generic queue structure
 *
 * Contains common data for Rx and Tx queues.
 *
 * Note the difference between n_bd and n_window: the hardware
 * always assumes 256 descriptors, so n_bd is always 256 (unless
 * there might be HW changes in the future). For the normal TX
 * queues, n_window, which is the size of the software queue data
 * is also 256; however, for the command queue, n_window is only
 * 32 since we don't need so many commands pending. Since the HW
 * still uses 256 BDs for DMA though, n_bd stays 256. As a result,
 * the software buffers (in the variables @meta, @txb in struct
 * iwl_tx_queue) only have 32 entries, while the HW buffers (@tfds
 * in the same struct) have 256.
 * This means that we end up with the following:
 *  HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
 *  SW entries:           | 0      | ... | 31          |
 * where N is a number between 0 and 7. This means that the SW
 * data is a window overlayed over the HW queue.
 */
struct iwl_queue {
        int n_bd;              /* number of BDs in this queue */
        int write_ptr;       /* 1-st empty entry (index) host_w*/
        int read_ptr;         /* last used entry (index) host_r*/
        /* use for monitoring and recovering the stuck queue */
        dma_addr_t dma_addr;   /* physical addr for BD's */
        int n_window;          /* safe queue window */
        u32 id;
        int low_mark;          /* low watermark, resume queue if free
                                * space more than this */
        int high_mark;         /* high watermark, stop queue if free
                                * space less than this */
};

/* One for each TFD */
struct iwl_tx_info {
        struct sk_buff *skb;
        struct iwl_rxon_context *ctx;
};

/**
 * struct iwl_tx_queue - Tx Queue for DMA
 * @q: generic Rx/Tx queue descriptor
 * @bd: base of circular buffer of TFDs
 * @cmd: array of command/TX buffer pointers
 * @meta: array of meta data for each command/tx buffer
 * @dma_addr_cmd: physical address of cmd/tx buffer array
 * @txb: array of per-TFD driver data
 * @time_stamp: time (in jiffies) of last read_ptr change
 * @need_update: indicates need to update read/write index
 * @sched_retry: indicates queue is high-throughput aggregation (HT AGG) enabled
 *
 * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
 * descriptors) and required locking structures.
 */
#define TFD_TX_CMD_SLOTS 256
#define TFD_CMD_SLOTS 32

struct iwl_tx_queue {
        struct iwl_queue q;
        struct iwl_tfd *tfds;
        struct iwl_device_cmd **cmd;
        struct iwl_cmd_meta *meta;
        struct iwl_tx_info *txb;
        unsigned long time_stamp;
        u8 need_update;
        u8 sched_retry;
        u8 active;
        u8 swq_id;
};

#define IWL_NUM_SCAN_RATES         (2)

/*
 * One for each channel, holds all channel setup data
 * Some of the fields (e.g. eeprom and flags/max_power_avg) are redundant
 *     with one another!
 */
struct iwl_channel_info {
        struct iwl_eeprom_channel eeprom;       /* EEPROM regulatory limit */
        struct iwl_eeprom_channel ht40_eeprom;  /* EEPROM regulatory limit for
                                                 * HT40 channel */

        u8 channel;       /* channel number */
        u8 flags;         /* flags copied from EEPROM */
        s8 max_power_avg; /* (dBm) regul. eeprom, normal Tx, any rate */
        s8 curr_txpow;    /* (dBm) regulatory/spectrum/user (not h/w) limit */
        s8 min_power;     /* always 0 */
        s8 scan_power;    /* (dBm) regul. eeprom, direct scans, any rate */

        u8 group_index;   /* 0-4, maps channel to group1/2/3/4/5 */
        u8 band_index;    /* 0-4, maps channel to band1/2/3/4/5 */
        enum ieee80211_band band;

        /* HT40 channel info */
        s8 ht40_max_power_avg;  /* (dBm) regul. eeprom, normal Tx, any rate */
        u8 ht40_flags;          /* flags copied from EEPROM */
        u8 ht40_extension_channel; /* HT_IE_EXT_CHANNEL_* */
};

#define IWL_TX_FIFO_BK          0       /* shared */
#define IWL_TX_FIFO_BE          1
#define IWL_TX_FIFO_VI          2       /* shared */
#define IWL_TX_FIFO_VO          3
#define IWL_TX_FIFO_BK_IPAN     IWL_TX_FIFO_BK
#define IWL_TX_FIFO_BE_IPAN     4
#define IWL_TX_FIFO_VI_IPAN     IWL_TX_FIFO_VI
#define IWL_TX_FIFO_VO_IPAN     5
#define IWL_TX_FIFO_UNUSED      -1

/* Minimum number of queues. MAX_NUM is defined in hw specific files.
 * Set the minimum to accommodate the 4 standard TX queues, 1 command
 * queue, 2 (unused) HCCA queues, and 4 HT queues (one for each AC) */
#define IWL_MIN_NUM_QUEUES      10

/*
 * Command queue depends on iPAN support.
 */
#define IWL_DEFAULT_CMD_QUEUE_NUM       4
#define IWL_IPAN_CMD_QUEUE_NUM          9

/*
 * This queue number is required for proper operation
 * because the ucode will stop/start the scheduler as
 * required.
 */
#define IWL_IPAN_MCAST_QUEUE            8

#define IEEE80211_DATA_LEN              2304
#define IEEE80211_4ADDR_LEN             30
#define IEEE80211_HLEN                  (IEEE80211_4ADDR_LEN)
#define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)


#define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
#define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
#define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)

enum {
        CMD_SYNC = 0,
        CMD_ASYNC = BIT(0),
        CMD_WANT_SKB = BIT(1),
        CMD_ON_DEMAND = BIT(2),
};

#define DEF_CMD_PAYLOAD_SIZE 320

/**
 * struct iwl_device_cmd
 *
 * For allocation of the command and tx queues, this establishes the overall
 * size of the largest command we send to uCode, except for commands that
 * aren't fully copied and use other TFD space.
 */
struct iwl_device_cmd {
        struct iwl_cmd_header hdr;      /* uCode API */
        union {
                u32 flags;
                u8 val8;
                u16 val16;
                u32 val32;
                struct iwl_tx_cmd tx;
                struct iwl6000_channel_switch_cmd chswitch;
                u8 payload[DEF_CMD_PAYLOAD_SIZE];
        } __packed cmd;
} __packed;

#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))

#define IWL_MAX_CMD_TFDS        2

enum iwl_hcmd_dataflag {
        IWL_HCMD_DFL_NOCOPY     = BIT(0),
};

/**
 * struct iwl_host_cmd - Host command to the uCode
 * @data: array of chunks that composes the data of the host command
 * @reply_page: pointer to the page that holds the response to the host command
 * @callback:
 * @flags: can be CMD_* note CMD_WANT_SKB is incompatible withe CMD_ASYNC
 * @len: array of the lenths of the chunks in data
 * @dataflags:
 * @id: id of the host command
 */
struct iwl_host_cmd {
        const void *data[IWL_MAX_CMD_TFDS];
        unsigned long reply_page;
        void (*callback)(struct iwl_priv *priv,
                         struct iwl_device_cmd *cmd,
                         struct iwl_rx_packet *pkt);
        u32 flags;
        u16 len[IWL_MAX_CMD_TFDS];
        u8 dataflags[IWL_MAX_CMD_TFDS];
        u8 id;
};

#define SUP_RATE_11A_MAX_NUM_CHANNELS  8
#define SUP_RATE_11B_MAX_NUM_CHANNELS  4
#define SUP_RATE_11G_MAX_NUM_CHANNELS  12

/**
 * struct iwl_rx_queue - Rx queue
 * @bd: driver's pointer to buffer of receive buffer descriptors (rbd)
 * @bd_dma: bus address of buffer of receive buffer descriptors (rbd)
 * @read: Shared index to newest available Rx buffer
 * @write: Shared index to oldest written Rx packet
 * @free_count: Number of pre-allocated buffers in rx_free
 * @rx_free: list of free SKBs for use
 * @rx_used: List of Rx buffers with no SKB
 * @need_update: flag to indicate we need to update read/write index
 * @rb_stts: driver's pointer to receive buffer status
 * @rb_stts_dma: bus address of receive buffer status
 *
 * NOTE:  rx_free and rx_used are used as a FIFO for iwl_rx_mem_buffers
 */
struct iwl_rx_queue {
        __le32 *bd;
        dma_addr_t bd_dma;
        struct iwl_rx_mem_buffer pool[RX_QUEUE_SIZE + RX_FREE_BUFFERS];
        struct iwl_rx_mem_buffer *queue[RX_QUEUE_SIZE];
        u32 read;
        u32 write;
        u32 free_count;
        u32 write_actual;
        struct list_head rx_free;
        struct list_head rx_used;
        int need_update;
        struct iwl_rb_status *rb_stts;
        dma_addr_t rb_stts_dma;
        spinlock_t lock;
};

#define IWL_SUPPORTED_RATES_IE_LEN         8

#define MAX_TID_COUNT        9

#define IWL_INVALID_RATE     0xFF
#define IWL_INVALID_VALUE    -1

/**
 * struct iwl_ht_agg -- aggregation status while waiting for block-ack
 * @txq_id: Tx queue used for Tx attempt
 * @frame_count: # frames attempted by Tx command
 * @wait_for_ba: Expect block-ack before next Tx reply
 * @start_idx: Index of 1st Transmit Frame Descriptor (TFD) in Tx window
 * @bitmap0: Low order bitmap, one bit for each frame pending ACK in Tx window
 * @bitmap1: High order, one bit for each frame pending ACK in Tx window
 * @rate_n_flags: Rate at which Tx was attempted
 *
 * If REPLY_TX indicates that aggregation was attempted, driver must wait
 * for block ack (REPLY_COMPRESSED_BA).  This struct stores tx reply info
 * until block ack arrives.
 */
struct iwl_ht_agg {
        u16 txq_id;
        u16 frame_count;
        u16 wait_for_ba;
        u16 start_idx;
        u64 bitmap;
        u32 rate_n_flags;
#define IWL_AGG_OFF 0
#define IWL_AGG_ON 1
#define IWL_EMPTYING_HW_QUEUE_ADDBA 2
#define IWL_EMPTYING_HW_QUEUE_DELBA 3
        u8 state;
        u8 tx_fifo;
};


struct iwl_tid_data {
        u16 seq_number; /* agn only */
        u16 tfds_in_queue;
        struct iwl_ht_agg agg;
};

struct iwl_hw_key {
        u32 cipher;
        int keylen;
        u8 keyidx;
        u8 key[32];
};

union iwl_ht_rate_supp {
        u16 rates;
        struct {
                u8 siso_rate;
                u8 mimo_rate;
        };
};

#define CFG_HT_RX_AMPDU_FACTOR_8K   (0x0)
#define CFG_HT_RX_AMPDU_FACTOR_16K  (0x1)
#define CFG_HT_RX_AMPDU_FACTOR_32K  (0x2)
#define CFG_HT_RX_AMPDU_FACTOR_64K  (0x3)
#define CFG_HT_RX_AMPDU_FACTOR_DEF  CFG_HT_RX_AMPDU_FACTOR_64K
#define CFG_HT_RX_AMPDU_FACTOR_MAX  CFG_HT_RX_AMPDU_FACTOR_64K
#define CFG_HT_RX_AMPDU_FACTOR_MIN  CFG_HT_RX_AMPDU_FACTOR_8K

/*
 * Maximal MPDU density for TX aggregation
 * 4 - 2us density
 * 5 - 4us density
 * 6 - 8us density
 * 7 - 16us density
 */
#define CFG_HT_MPDU_DENSITY_2USEC   (0x4)
#define CFG_HT_MPDU_DENSITY_4USEC   (0x5)
#define CFG_HT_MPDU_DENSITY_8USEC   (0x6)
#define CFG_HT_MPDU_DENSITY_16USEC  (0x7)
#define CFG_HT_MPDU_DENSITY_DEF CFG_HT_MPDU_DENSITY_4USEC
#define CFG_HT_MPDU_DENSITY_MAX CFG_HT_MPDU_DENSITY_16USEC
#define CFG_HT_MPDU_DENSITY_MIN     (0x1)

struct iwl_ht_config {
        bool single_chain_sufficient;
        enum ieee80211_smps_mode smps; /* current smps mode */
};

/* QoS structures */
struct iwl_qos_info {
        int qos_active;
        struct iwl_qosparam_cmd def_qos_parm;
};

/*
 * Structure should be accessed with sta_lock held. When station addition
 * is in progress (IWL_STA_UCODE_INPROGRESS) it is possible to access only
 * the commands (iwl_addsta_cmd and iwl_link_quality_cmd) without sta_lock
 * held.
 */
struct iwl_station_entry {
        struct iwl_addsta_cmd sta;
        struct iwl_tid_data tid[MAX_TID_COUNT];
        u8 used, ctxid;
        struct iwl_hw_key keyinfo;
        struct iwl_link_quality_cmd *lq;
};

struct iwl_station_priv_common {
        struct iwl_rxon_context *ctx;
        u8 sta_id;
};

/*
 * iwl_station_priv: Driver's private station information
 *
 * When mac80211 creates a station it reserves some space (hw->sta_data_size)
 * in the structure for use by driver. This structure is places in that
 * space.
 */
struct iwl_station_priv {
        struct iwl_station_priv_common common;
        struct iwl_lq_sta lq_sta;
        atomic_t pending_frames;
        bool client;
        bool asleep;
        u8 max_agg_bufsize;
};

/**
 * struct iwl_vif_priv - driver's private per-interface information
 *
 * When mac80211 allocates a virtual interface, it can allocate
 * space for us to put data into.
 */
struct iwl_vif_priv {
        struct iwl_rxon_context *ctx;
        u8 ibss_bssid_sta_id;
};

/* one for each uCode image (inst/data, boot/init/runtime) */
struct fw_desc {
        void *v_addr;           /* access by driver */
        dma_addr_t p_addr;      /* access by card's busmaster DMA */
        u32 len;                /* bytes */
};

struct fw_img {
        struct fw_desc code, data;
};

/* v1/v2 uCode file layout */
struct iwl_ucode_header {
        __le32 ver;     /* major/minor/API/serial */
        union {
                struct {
                        __le32 inst_size;       /* bytes of runtime code */
                        __le32 data_size;       /* bytes of runtime data */
                        __le32 init_size;       /* bytes of init code */
                        __le32 init_data_size;  /* bytes of init data */
                        __le32 boot_size;       /* bytes of bootstrap code */
                        u8 data[0];             /* in same order as sizes */
                } v1;
                struct {
                        __le32 build;           /* build number */
                        __le32 inst_size;       /* bytes of runtime code */
                        __le32 data_size;       /* bytes of runtime data */
                        __le32 init_size;       /* bytes of init code */
                        __le32 init_data_size;  /* bytes of init data */
                        __le32 boot_size;       /* bytes of bootstrap code */
                        u8 data[0];             /* in same order as sizes */
                } v2;
        } u;
};

/*
 * new TLV uCode file layout
 *
 * The new TLV file format contains TLVs, that each specify
 * some piece of data. To facilitate "groups", for example
 * different instruction image with different capabilities,
 * bundled with the same init image, an alternative mechanism
 * is provided:
 * When the alternative field is 0, that means that the item
 * is always valid. When it is non-zero, then it is only
 * valid in conjunction with items of the same alternative,
 * in which case the driver (user) selects one alternative
 * to use.
 */

enum iwl_ucode_tlv_type {
        IWL_UCODE_TLV_INVALID           = 0, /* unused */
        IWL_UCODE_TLV_INST              = 1,
        IWL_UCODE_TLV_DATA              = 2,
        IWL_UCODE_TLV_INIT              = 3,
        IWL_UCODE_TLV_INIT_DATA         = 4,
        IWL_UCODE_TLV_BOOT              = 5,
        IWL_UCODE_TLV_PROBE_MAX_LEN     = 6, /* a u32 value */
        IWL_UCODE_TLV_PAN               = 7,
        IWL_UCODE_TLV_RUNT_EVTLOG_PTR   = 8,
        IWL_UCODE_TLV_RUNT_EVTLOG_SIZE  = 9,
        IWL_UCODE_TLV_RUNT_ERRLOG_PTR   = 10,
        IWL_UCODE_TLV_INIT_EVTLOG_PTR   = 11,
        IWL_UCODE_TLV_INIT_EVTLOG_SIZE  = 12,
        IWL_UCODE_TLV_INIT_ERRLOG_PTR   = 13,
        IWL_UCODE_TLV_ENHANCE_SENS_TBL  = 14,
        IWL_UCODE_TLV_PHY_CALIBRATION_SIZE = 15,
        /* 16 and 17 reserved for future use */
        IWL_UCODE_TLV_FLAGS             = 18,
};

/**
 * enum iwl_ucode_tlv_flag - ucode API flags
 * @IWL_UCODE_TLV_FLAGS_PAN: This is PAN capable microcode; this previously
 *      was a separate TLV but moved here to save space.
 * @IWL_UCODE_TLV_FLAGS_NEWSCAN: new uCode scan behaviour on hidden SSID,
 *      treats good CRC threshold as a boolean
 * @IWL_UCODE_TLV_FLAGS_MFP: This uCode image supports MFP (802.11w).
 */
enum iwl_ucode_tlv_flag {
        IWL_UCODE_TLV_FLAGS_PAN         = BIT(0),
        IWL_UCODE_TLV_FLAGS_NEWSCAN     = BIT(1),
        IWL_UCODE_TLV_FLAGS_MFP         = BIT(2),
};

struct iwl_ucode_tlv {
        __le16 type;            /* see above */
        __le16 alternative;     /* see comment */
        __le32 length;          /* not including type/length fields */
        u8 data[0];
} __packed;

#define IWL_TLV_UCODE_MAGIC     0x0a4c5749

struct iwl_tlv_ucode_header {
        /*
         * The TLV style ucode header is distinguished from
         * the v1/v2 style header by first four bytes being
         * zero, as such is an invalid combination of
         * major/minor/API/serial versions.
         */
        __le32 zero;
        __le32 magic;
        u8 human_readable[64];
        __le32 ver;             /* major/minor/API/serial */
        __le32 build;
        __le64 alternatives;    /* bitmask of valid alternatives */
        /*
         * The data contained herein has a TLV layout,
         * see above for the TLV header and types.
         * Note that each TLV is padded to a length
         * that is a multiple of 4 for alignment.
         */
        u8 data[0];
};

struct iwl_sensitivity_ranges {
        u16 min_nrg_cck;
        u16 max_nrg_cck;

        u16 nrg_th_cck;
        u16 nrg_th_ofdm;

        u16 auto_corr_min_ofdm;
        u16 auto_corr_min_ofdm_mrc;
        u16 auto_corr_min_ofdm_x1;
        u16 auto_corr_min_ofdm_mrc_x1;

        u16 auto_corr_max_ofdm;
        u16 auto_corr_max_ofdm_mrc;
        u16 auto_corr_max_ofdm_x1;
        u16 auto_corr_max_ofdm_mrc_x1;

        u16 auto_corr_max_cck;
        u16 auto_corr_max_cck_mrc;
        u16 auto_corr_min_cck;
        u16 auto_corr_min_cck_mrc;

        u16 barker_corr_th_min;
        u16 barker_corr_th_min_mrc;
        u16 nrg_th_cca;
};


#define KELVIN_TO_CELSIUS(x) ((x)-273)
#define CELSIUS_TO_KELVIN(x) ((x)+273)


/**
 * struct iwl_hw_params
 * @max_txq_num: Max # Tx queues supported
 * @scd_bc_tbls_size: size of scheduler byte count tables
 * @tfd_size: TFD size
 * @tx/rx_chains_num: Number of TX/RX chains
 * @valid_tx/rx_ant: usable antennas
 * @max_rxq_size: Max # Rx frames in Rx queue (must be power-of-2)
 * @max_rxq_log: Log-base-2 of max_rxq_size
 * @rx_page_order: Rx buffer page order
 * @rx_wrt_ptr_reg: FH{39}_RSCSR_CHNL0_WPTR
 * @max_stations:
 * @ht40_channel: is 40MHz width possible in band 2.4
 * BIT(IEEE80211_BAND_5GHZ) BIT(IEEE80211_BAND_5GHZ)
 * @sw_crypto: 0 for hw, 1 for sw
 * @max_xxx_size: for ucode uses
 * @ct_kill_threshold: temperature threshold
 * @beacon_time_tsf_bits: number of valid tsf bits for beacon time
 * @calib_init_cfg: setup initial calibrations for the hw
 * @calib_rt_cfg: setup runtime calibrations for the hw
 * @struct iwl_sensitivity_ranges: range of sensitivity values
 */
struct iwl_hw_params {
        u8 max_txq_num;
        u16 scd_bc_tbls_size;
        u32 tfd_size;
        u8  tx_chains_num;
        u8  rx_chains_num;
        u8  valid_tx_ant;
        u8  valid_rx_ant;
        u16 max_rxq_size;
        u16 max_rxq_log;
        u32 rx_page_order;
        u8  max_stations;
        u8  ht40_channel;
        u8  max_beacon_itrvl;   /* in 1024 ms */
        u32 max_inst_size;
        u32 max_data_size;
        u32 ct_kill_threshold; /* value in hw-dependent units */
        u32 ct_kill_exit_threshold; /* value in hw-dependent units */
                                    /* for 1000, 6000 series and up */
        u16 beacon_time_tsf_bits;
        u32 calib_init_cfg;
        u32 calib_rt_cfg;
        const struct iwl_sensitivity_ranges *sens;
};


/******************************************************************************
 *
 * Functions implemented in core module which are forward declared here
 * for use by iwl-[4-5].c
 *
 * NOTE:  The implementation of these functions are not hardware specific
 * which is why they are in the core module files.
 *
 * Naming convention --
 * iwl_         <-- Is part of iwlwifi
 * iwlXXXX_     <-- Hardware specific (implemented in iwl-XXXX.c for XXXX)
 *
 ****************************************************************************/
extern void iwl_update_chain_flags(struct iwl_priv *priv);
extern const u8 iwl_bcast_addr[ETH_ALEN];
extern int iwl_queue_space(const struct iwl_queue *q);
static inline int iwl_queue_used(const struct iwl_queue *q, int i)
{
        return q->write_ptr >= q->read_ptr ?
                (i >= q->read_ptr && i < q->write_ptr) :
                !(i < q->read_ptr && i >= q->write_ptr);
}


static inline u8 get_cmd_index(struct iwl_queue *q, u32 index)
{
        return index & (q->n_window - 1);
}


struct iwl_dma_ptr {
        dma_addr_t dma;
        void *addr;
        size_t size;
};

#define IWL_OPERATION_MODE_AUTO     0
#define IWL_OPERATION_MODE_HT_ONLY  1
#define IWL_OPERATION_MODE_MIXED    2
#define IWL_OPERATION_MODE_20MHZ    3

#define IWL_TX_CRC_SIZE 4
#define IWL_TX_DELIMITER_SIZE 4

#define TX_POWER_IWL_ILLEGAL_VOLTAGE -10000

/* Sensitivity and chain noise calibration */
#define INITIALIZATION_VALUE            0xFFFF
#define IWL_CAL_NUM_BEACONS             16
#define MAXIMUM_ALLOWED_PATHLOSS        15

#define CHAIN_NOISE_MAX_DELTA_GAIN_CODE 3

#define MAX_FA_OFDM  50
#define MIN_FA_OFDM  5
#define MAX_FA_CCK   50
#define MIN_FA_CCK   5

#define AUTO_CORR_STEP_OFDM       1

#define AUTO_CORR_STEP_CCK     3
#define AUTO_CORR_MAX_TH_CCK   160

#define NRG_DIFF               2
#define NRG_STEP_CCK           2
#define NRG_MARGIN             8
#define MAX_NUMBER_CCK_NO_FA 100

#define AUTO_CORR_CCK_MIN_VAL_DEF    (125)

#define CHAIN_A             0
#define CHAIN_B             1
#define CHAIN_C             2
#define CHAIN_NOISE_DELTA_GAIN_INIT_VAL 4
#define ALL_BAND_FILTER                 0xFF00
#define IN_BAND_FILTER                  0xFF
#define MIN_AVERAGE_NOISE_MAX_VALUE     0xFFFFFFFF

#define NRG_NUM_PREV_STAT_L     20
#define NUM_RX_CHAINS           3

enum iwlagn_false_alarm_state {
        IWL_FA_TOO_MANY = 0,
        IWL_FA_TOO_FEW = 1,
        IWL_FA_GOOD_RANGE = 2,
};

enum iwlagn_chain_noise_state {
        IWL_CHAIN_NOISE_ALIVE = 0,  /* must be 0 */
        IWL_CHAIN_NOISE_ACCUMULATE,
        IWL_CHAIN_NOISE_CALIBRATED,
        IWL_CHAIN_NOISE_DONE,
};


/*
 * enum iwl_calib
 * defines the order in which results of initial calibrations
 * should be sent to the runtime uCode
 */
enum iwl_calib {
        IWL_CALIB_XTAL,
        IWL_CALIB_DC,
        IWL_CALIB_LO,
        IWL_CALIB_TX_IQ,
        IWL_CALIB_TX_IQ_PERD,
        IWL_CALIB_BASE_BAND,
        IWL_CALIB_TEMP_OFFSET,
        IWL_CALIB_MAX
};

/* Opaque calibration results */
struct iwl_calib_result {
        void *buf;
        size_t buf_len;
};

/* Sensitivity calib data */
struct iwl_sensitivity_data {
        u32 auto_corr_ofdm;
        u32 auto_corr_ofdm_mrc;
        u32 auto_corr_ofdm_x1;
        u32 auto_corr_ofdm_mrc_x1;
        u32 auto_corr_cck;
        u32 auto_corr_cck_mrc;

        u32 last_bad_plcp_cnt_ofdm;
        u32 last_fa_cnt_ofdm;
        u32 last_bad_plcp_cnt_cck;
        u32 last_fa_cnt_cck;

        u32 nrg_curr_state;
        u32 nrg_prev_state;
        u32 nrg_value[10];
        u8  nrg_silence_rssi[NRG_NUM_PREV_STAT_L];
        u32 nrg_silence_ref;
        u32 nrg_energy_idx;
        u32 nrg_silence_idx;
        u32 nrg_th_cck;
        s32 nrg_auto_corr_silence_diff;
        u32 num_in_cck_no_fa;
        u32 nrg_th_ofdm;

        u16 barker_corr_th_min;
        u16 barker_corr_th_min_mrc;
        u16 nrg_th_cca;
};

/* Chain noise (differential Rx gain) calib data */
struct iwl_chain_noise_data {
        u32 active_chains;
        u32 chain_noise_a;
        u32 chain_noise_b;
        u32 chain_noise_c;
        u32 chain_signal_a;
        u32 chain_signal_b;
        u32 chain_signal_c;
        u16 beacon_count;
        u8 disconn_array[NUM_RX_CHAINS];
        u8 delta_gain_code[NUM_RX_CHAINS];
        u8 radio_write;
        u8 state;
};

#define EEPROM_SEM_TIMEOUT 10           /* milliseconds */
#define EEPROM_SEM_RETRY_LIMIT 1000     /* number of attempts (not time) */

#define IWL_TRAFFIC_ENTRIES     (256)
#define IWL_TRAFFIC_ENTRY_SIZE  (64)

enum {
        MEASUREMENT_READY = (1 << 0),
        MEASUREMENT_ACTIVE = (1 << 1),
};

enum iwl_nvm_type {
        NVM_DEVICE_TYPE_EEPROM = 0,
        NVM_DEVICE_TYPE_OTP,
};

/*
 * Two types of OTP memory access modes
 *   IWL_OTP_ACCESS_ABSOLUTE - absolute address mode,
 *                              based on physical memory addressing
 *   IWL_OTP_ACCESS_RELATIVE - relative address mode,
 *                             based on logical memory addressing
 */
enum iwl_access_mode {
        IWL_OTP_ACCESS_ABSOLUTE,
        IWL_OTP_ACCESS_RELATIVE,
};

/**
 * enum iwl_pa_type - Power Amplifier type
 * @IWL_PA_SYSTEM:  based on uCode configuration
 * @IWL_PA_INTERNAL: use Internal only
 */
enum iwl_pa_type {
        IWL_PA_SYSTEM = 0,
        IWL_PA_INTERNAL = 1,
};

/* interrupt statistics */
struct isr_statistics {
        u32 hw;
        u32 sw;
        u32 err_code;
        u32 sch;
        u32 alive;
        u32 rfkill;
        u32 ctkill;
        u32 wakeup;
        u32 rx;
        u32 rx_handlers[REPLY_MAX];
        u32 tx;
        u32 unhandled;
};

/* reply_tx_statistics (for _agn devices) */
struct reply_tx_error_statistics {
        u32 pp_delay;
        u32 pp_few_bytes;
        u32 pp_bt_prio;
        u32 pp_quiet_period;
        u32 pp_calc_ttak;
        u32 int_crossed_retry;
        u32 short_limit;
        u32 long_limit;
        u32 fifo_underrun;
        u32 drain_flow;
        u32 rfkill_flush;
        u32 life_expire;
        u32 dest_ps;
        u32 host_abort;
        u32 bt_retry;
        u32 sta_invalid;
        u32 frag_drop;
        u32 tid_disable;
        u32 fifo_flush;
        u32 insuff_cf_poll;
        u32 fail_hw_drop;
        u32 sta_color_mismatch;
        u32 unknown;
};

/* reply_agg_tx_statistics (for _agn devices) */
struct reply_agg_tx_error_statistics {
        u32 underrun;
        u32 bt_prio;
        u32 few_bytes;
        u32 abort;
        u32 last_sent_ttl;
        u32 last_sent_try;
        u32 last_sent_bt_kill;
        u32 scd_query;
        u32 bad_crc32;
        u32 response;
        u32 dump_tx;
        u32 delay_tx;
        u32 unknown;
};

/* management statistics */
enum iwl_mgmt_stats {
        MANAGEMENT_ASSOC_REQ = 0,
        MANAGEMENT_ASSOC_RESP,
        MANAGEMENT_REASSOC_REQ,
        MANAGEMENT_REASSOC_RESP,
        MANAGEMENT_PROBE_REQ,
        MANAGEMENT_PROBE_RESP,
        MANAGEMENT_BEACON,
        MANAGEMENT_ATIM,
        MANAGEMENT_DISASSOC,
        MANAGEMENT_AUTH,
        MANAGEMENT_DEAUTH,
        MANAGEMENT_ACTION,
        MANAGEMENT_MAX,
};
/* control statistics */
enum iwl_ctrl_stats {
        CONTROL_BACK_REQ =  0,
        CONTROL_BACK,
        CONTROL_PSPOLL,
        CONTROL_RTS,
        CONTROL_CTS,
        CONTROL_ACK,
        CONTROL_CFEND,
        CONTROL_CFENDACK,
        CONTROL_MAX,
};

struct traffic_stats {
#ifdef CONFIG_IWLWIFI_DEBUGFS
        u32 mgmt[MANAGEMENT_MAX];
        u32 ctrl[CONTROL_MAX];
        u32 data_cnt;
        u64 data_bytes;
#endif
};

/*
 * schedule the timer to wake up every UCODE_TRACE_PERIOD milliseconds
 * to perform continuous uCode event logging operation if enabled
 */
#define UCODE_TRACE_PERIOD (100)

/*
 * iwl_event_log: current uCode event log position
 *
 * @ucode_trace: enable/disable ucode continuous trace timer
 * @num_wraps: how many times the event buffer wraps
 * @next_entry:  the entry just before the next one that uCode would fill
 * @non_wraps_count: counter for no wrap detected when dump ucode events
 * @wraps_once_count: counter for wrap once detected when dump ucode events
 * @wraps_more_count: counter for wrap more than once detected
 *                    when dump ucode events
 */
struct iwl_event_log {
        bool ucode_trace;
        u32 num_wraps;
        u32 next_entry;
        int non_wraps_count;
        int wraps_once_count;
        int wraps_more_count;
};

/*
 * host interrupt timeout value
 * used with setting interrupt coalescing timer
 * the CSR_INT_COALESCING is an 8 bit register in 32-usec unit
 *
 * default interrupt coalescing timer is 64 x 32 = 2048 usecs
 * default interrupt coalescing calibration timer is 16 x 32 = 512 usecs
 */
#define IWL_HOST_INT_TIMEOUT_MAX        (0xFF)
#define IWL_HOST_INT_TIMEOUT_DEF        (0x40)
#define IWL_HOST_INT_TIMEOUT_MIN        (0x0)
#define IWL_HOST_INT_CALIB_TIMEOUT_MAX  (0xFF)
#define IWL_HOST_INT_CALIB_TIMEOUT_DEF  (0x10)
#define IWL_HOST_INT_CALIB_TIMEOUT_MIN  (0x0)

/*
 * This is the threshold value of plcp error rate per 100mSecs.  It is
 * used to set and check for the validity of plcp_delta.
 */
#define IWL_MAX_PLCP_ERR_THRESHOLD_MIN  (1)
#define IWL_MAX_PLCP_ERR_THRESHOLD_DEF  (50)
#define IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF     (100)
#define IWL_MAX_PLCP_ERR_EXT_LONG_THRESHOLD_DEF (200)
#define IWL_MAX_PLCP_ERR_THRESHOLD_MAX  (255)
#define IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE      (0)

#define IWL_DELAY_NEXT_FORCE_RF_RESET  (HZ*3)
#define IWL_DELAY_NEXT_FORCE_FW_RELOAD (HZ*5)

/* TX queue watchdog timeouts in mSecs */
#define IWL_DEF_WD_TIMEOUT      (2000)
#define IWL_LONG_WD_TIMEOUT     (10000)
#define IWL_MAX_WD_TIMEOUT      (120000)

/* BT Antenna Coupling Threshold (dB) */
#define IWL_BT_ANTENNA_COUPLING_THRESHOLD       (35)

/* Firmware reload counter and Timestamp */
#define IWL_MIN_RELOAD_DURATION         1000 /* 1000 ms */
#define IWL_MAX_CONTINUE_RELOAD_CNT     4


enum iwl_reset {
        IWL_RF_RESET = 0,
        IWL_FW_RESET,
        IWL_MAX_FORCE_RESET,
};

struct iwl_force_reset {
        int reset_request_count;
        int reset_success_count;
        int reset_reject_count;
        unsigned long reset_duration;
        unsigned long last_force_reset_jiffies;
};

/* extend beacon time format bit shifting  */
/*
 * for _agn devices
 * bits 31:22 - extended
 * bits 21:0  - interval
 */
#define IWLAGN_EXT_BEACON_TIME_POS      22

/**
 * struct iwl_notification_wait - notification wait entry
 * @list: list head for global list
 * @fn: function called with the notification
 * @cmd: command ID
 *
 * This structure is not used directly, to wait for a
 * notification declare it on the stack, and call
 * iwlagn_init_notification_wait() with appropriate
 * parameters. Then do whatever will cause the ucode
 * to notify the driver, and to wait for that then
 * call iwlagn_wait_notification().
 *
 * Each notification is one-shot. If at some point we
 * need to support multi-shot notifications (which
 * can't be allocated on the stack) we need to modify
 * the code for them.
 */
struct iwl_notification_wait {
        struct list_head list;

        void (*fn)(struct iwl_priv *priv, struct iwl_rx_packet *pkt,
                   void *data);
        void *fn_data;

        u8 cmd;
        bool triggered, aborted;
};

enum iwl_rxon_context_id {
        IWL_RXON_CTX_BSS,
        IWL_RXON_CTX_PAN,

        NUM_IWL_RXON_CTX
};

struct iwl_rxon_context {
        struct ieee80211_vif *vif;

        const u8 *ac_to_fifo;
        const u8 *ac_to_queue;
        u8 mcast_queue;

        /*
         * We could use the vif to indicate active, but we
         * also need it to be active during disabling when
         * we already removed the vif for type setting.
         */
        bool always_active, is_active;

        bool ht_need_multiple_chains;

        enum iwl_rxon_context_id ctxid;

        u32 interface_modes, exclusive_interface_modes;
        u8 unused_devtype, ap_devtype, ibss_devtype, station_devtype;

        /*
         * We declare this const so it can only be
         * changed via explicit cast within the
         * routines that actually update the physical
         * hardware.
         */
        const struct iwl_rxon_cmd active;
        struct iwl_rxon_cmd staging;

        struct iwl_rxon_time_cmd timing;

        struct iwl_qos_info qos_data;

        u8 bcast_sta_id, ap_sta_id;

        u8 rxon_cmd, rxon_assoc_cmd, rxon_timing_cmd;
        u8 qos_cmd;
        u8 wep_key_cmd;

        struct iwl_wep_key wep_keys[WEP_KEYS_MAX];
        u8 key_mapping_keys;

        __le32 station_flags;

        struct {
                bool non_gf_sta_present;
                u8 protection;
                bool enabled, is_40mhz;
                u8 extension_chan_offset;
        } ht;

        bool last_tx_rejected;
};

enum iwl_scan_type {
        IWL_SCAN_NORMAL,
        IWL_SCAN_RADIO_RESET,
        IWL_SCAN_OFFCH_TX,
};

enum iwlagn_ucode_type {
        IWL_UCODE_NONE,
        IWL_UCODE_REGULAR,
        IWL_UCODE_INIT,
        IWL_UCODE_WOWLAN,
};

#ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
struct iwl_testmode_trace {
        u32 buff_size;
        u32 total_size;
        u32 num_chunks;
        u8 *cpu_addr;
        u8 *trace_addr;
        dma_addr_t dma_addr;
        bool trace_enabled;
};
#endif

struct iwl_bus;

/**
 * struct iwl_bus_ops - bus specific operations

 * @get_pm_support: must returns true if the bus can go to sleep
 * @apm_config: will be called during the config of the APM configuration
 * @set_drv_data: set the priv pointer to the bus layer
 * @get_dev: returns the device struct
 * @get_irq: returns the irq number
 * @get_hw_id: prints the hw_id in the provided buffer
 * @write8: write a byte to register at offset ofs
 * @write32: write a dword to register at offset ofs
 * @wread32: read a dword at register at offset ofs
 */
struct iwl_bus_ops {
        bool (*get_pm_support)(struct iwl_bus *bus);
        void (*apm_config)(struct iwl_bus *bus);
        void (*set_drv_data)(struct iwl_bus *bus, void *priv);
        struct device *(*get_dev)(const struct iwl_bus *bus);
        unsigned int (*get_irq)(const struct iwl_bus *bus);
        void (*get_hw_id)(struct iwl_bus *bus, char buf[], int buf_len);
        void (*write8)(struct iwl_bus *bus, u32 ofs, u8 val);
        void (*write32)(struct iwl_bus *bus, u32 ofs, u32 val);
        u32 (*read32)(struct iwl_bus *bus, u32 ofs);
};

struct iwl_bus {
        /* pointer to bus specific struct */
        void *bus_specific;

        /* Common data to all buses */
        struct iwl_priv *priv; /* driver's context */
        struct device *dev;
        struct iwl_bus_ops *ops;
        unsigned int irq;
};

struct iwl_trans;

/**
 * struct iwl_trans_ops - transport specific operations

 * @rx_init: inits the rx memory, allocate it if needed
 * @rx_stop: stop the rx
 * @rx_free: frees the rx memory
 * @tx_init:inits the tx memory, allocate if needed
 * @tx_stop: stop the tx
 * @tx_free: frees the tx memory
 * @send_cmd:send a host command
 * @send_cmd_pdu:send a host command: flags can be CMD_*
 */
struct iwl_trans_ops {
        int (*rx_init)(struct iwl_priv *priv);
        int (*rx_stop)(struct iwl_priv *priv);
        void (*rx_free)(struct iwl_priv *priv);

        int (*tx_init)(struct iwl_priv *priv);
        int (*tx_stop)(struct iwl_priv *priv);
        void (*tx_free)(struct iwl_priv *priv);

        int (*send_cmd)(struct iwl_priv *priv, struct iwl_host_cmd *cmd);

        int (*send_cmd_pdu)(struct iwl_priv *priv, u8 id, u32 flags, u16 len,
                     const void *data);
};

struct iwl_trans {
        const struct iwl_trans_ops *ops;
};

/* uCode ownership */
#define IWL_OWNERSHIP_DRIVER    0
#define IWL_OWNERSHIP_TM        1

struct iwl_priv {

        /* ieee device used by generic ieee processing code */
        struct ieee80211_hw *hw;
        struct ieee80211_channel *ieee_channels;
        struct ieee80211_rate *ieee_rates;
        struct iwl_cfg *cfg;

        enum ieee80211_band band;

        void (*pre_rx_handler)(struct iwl_priv *priv,
                               struct iwl_rx_mem_buffer *rxb);
        void (*rx_handlers[REPLY_MAX])(struct iwl_priv *priv,
                                       struct iwl_rx_mem_buffer *rxb);

        struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];

        /* spectrum measurement report caching */
        struct iwl_spectrum_notification measure_report;
        u8 measurement_status;

        /* ucode beacon time */
        u32 ucode_beacon_time;
        int missed_beacon_threshold;

        /* track IBSS manager (last beacon) status */
        u32 ibss_manager;

        /* jiffies when last recovery from statistics was performed */
        unsigned long rx_statistics_jiffies;

        /* force reset */
        struct iwl_force_reset force_reset[IWL_MAX_FORCE_RESET];

        /* firmware reload counter and timestamp */
        unsigned long reload_jiffies;
        int reload_count;

        /* we allocate array of iwl_channel_info for NIC's valid channels.
         *    Access via channel # using indirect index array */
        struct iwl_channel_info *channel_info;  /* channel info array */
        u8 channel_count;       /* # of channels */

        /* thermal calibration */
        s32 temperature;        /* degrees Kelvin */
        s32 last_temperature;

        /* init calibration results */
        struct iwl_calib_result calib_results[IWL_CALIB_MAX];

        /* Scan related variables */
        unsigned long scan_start;
        unsigned long scan_start_tsf;
        void *scan_cmd;
        enum ieee80211_band scan_band;
        struct cfg80211_scan_request *scan_request;
        struct ieee80211_vif *scan_vif;
        enum iwl_scan_type scan_type;
        u8 scan_tx_ant[IEEE80211_NUM_BANDS];
        u8 mgmt_tx_ant;

        /* spinlock */
        spinlock_t lock;        /* protect general shared data */
        spinlock_t hcmd_lock;   /* protect hcmd */
        spinlock_t reg_lock;    /* protect hw register access */
        struct mutex mutex;

        struct iwl_bus bus;     /* bus specific data */
        struct iwl_trans trans;

        /* microcode/device supports multiple contexts */
        u8 valid_contexts;

        /* command queue number */
        u8 cmd_queue;

        /* max number of station keys */
        u8 sta_key_max_num;

        bool new_scan_threshold_behaviour;

        /* EEPROM MAC addresses */
        struct mac_address addresses[2];

        /* uCode images, save to reload in case of failure */
        int fw_index;                   /* firmware we're trying to load */
        u32 ucode_ver;                  /* version of ucode, copy of
                                           iwl_ucode.ver */

        /* uCode owner: default: IWL_OWNERSHIP_DRIVER */
        u8 ucode_owner;

        struct fw_img ucode_rt;
        struct fw_img ucode_init;

        enum iwlagn_ucode_type ucode_type;
        u8 ucode_write_complete;        /* the image write is complete */
        char firmware_name[25];

        struct iwl_rxon_context contexts[NUM_IWL_RXON_CTX];

        __le16 switch_channel;

        struct {
                u32 error_event_table;
                u32 log_event_table;
        } device_pointers;

        u16 active_rate;

        u8 start_calib;
        struct iwl_sensitivity_data sensitivity_data;
        struct iwl_chain_noise_data chain_noise_data;
        bool enhance_sensitivity_table;
        __le16 sensitivity_tbl[HD_TABLE_SIZE];
        __le16 enhance_sensitivity_tbl[ENHANCE_HD_TABLE_ENTRIES];

        struct iwl_ht_config current_ht_config;

        /* Rate scaling data */
        u8 retry_rate;

        wait_queue_head_t wait_command_queue;

        int activity_timer_active;

        /* Rx and Tx DMA processing queues */
        struct iwl_rx_queue rxq;
        struct iwl_tx_queue *txq;
        unsigned long txq_ctx_active_msk;
        struct iwl_dma_ptr  kw; /* keep warm address */
        struct iwl_dma_ptr  scd_bc_tbls;

        u32 scd_base_addr;      /* scheduler sram base address */

        unsigned long status;

        /* counts mgmt, ctl, and data packets */
        struct traffic_stats tx_stats;
        struct traffic_stats rx_stats;

        /* counts interrupts */
        struct isr_statistics isr_stats;

        struct iwl_power_mgr power_data;
        struct iwl_tt_mgmt thermal_throttle;

        /* station table variables */

        /* Note: if lock and sta_lock are needed, lock must be acquired first */
        spinlock_t sta_lock;
        int num_stations;
        struct iwl_station_entry stations[IWLAGN_STATION_COUNT];
        unsigned long ucode_key_table;

        /* queue refcounts */
#define IWL_MAX_HW_QUEUES       32
        unsigned long queue_stopped[BITS_TO_LONGS(IWL_MAX_HW_QUEUES)];
        /* for each AC */
        atomic_t queue_stop_count[4];

        /* Indication if ieee80211_ops->open has been called */
        u8 is_open;

        u8 mac80211_registered;

        /* eeprom -- this is in the card's little endian byte order */
        u8 *eeprom;
        int    nvm_device_type;
        struct iwl_eeprom_calib_info *calib_info;

        enum nl80211_iftype iw_mode;

        /* Last Rx'd beacon timestamp */
        u64 timestamp;

        struct {
                __le32 flag;
                struct statistics_general_common common;
                struct statistics_rx_non_phy rx_non_phy;
                struct statistics_rx_phy rx_ofdm;
                struct statistics_rx_ht_phy rx_ofdm_ht;
                struct statistics_rx_phy rx_cck;
                struct statistics_tx tx;
#ifdef CONFIG_IWLWIFI_DEBUGFS
                struct statistics_bt_activity bt_activity;
                __le32 num_bt_kills, accum_num_bt_kills;
#endif
        } statistics;
#ifdef CONFIG_IWLWIFI_DEBUGFS
        struct {
                struct statistics_general_common common;
                struct statistics_rx_non_phy rx_non_phy;
                struct statistics_rx_phy rx_ofdm;
                struct statistics_rx_ht_phy rx_ofdm_ht;
                struct statistics_rx_phy rx_cck;
                struct statistics_tx tx;
                struct statistics_bt_activity bt_activity;
        } accum_stats, delta_stats, max_delta_stats;
#endif

        struct {
                /* INT ICT Table */
                __le32 *ict_tbl;
                void *ict_tbl_vir;
                dma_addr_t ict_tbl_dma;
                dma_addr_t aligned_ict_tbl_dma;
                int ict_index;
                u32 inta;
                bool use_ict;
                /*
                 * reporting the number of tids has AGG on. 0 means
                 * no AGGREGATION
                 */
                u8 agg_tids_count;

                struct iwl_rx_phy_res last_phy_res;
                bool last_phy_res_valid;

                struct completion firmware_loading_complete;

                u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
                u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;

                /*
                 * chain noise reset and gain commands are the
                 * two extra calibration commands follows the standard
                 * phy calibration commands
                 */
                u8 phy_calib_chain_noise_reset_cmd;
                u8 phy_calib_chain_noise_gain_cmd;

                /* counts reply_tx error */
                struct reply_tx_error_statistics reply_tx_stats;
                struct reply_agg_tx_error_statistics reply_agg_tx_stats;
                /* notification wait support */
                struct list_head notif_waits;
                spinlock_t notif_wait_lock;
                wait_queue_head_t notif_waitq;

                /* remain-on-channel offload support */
                struct ieee80211_channel *hw_roc_channel;
                struct delayed_work hw_roc_work;
                enum nl80211_channel_type hw_roc_chantype;
                int hw_roc_duration;
                bool hw_roc_setup;

                struct sk_buff *offchan_tx_skb;
                int offchan_tx_timeout;
                struct ieee80211_channel *offchan_tx_chan;
        } _agn;

        /* bt coex */
        u8 bt_enable_flag;
        u8 bt_status;
        u8 bt_traffic_load, last_bt_traffic_load;
        bool bt_ch_announce;
        bool bt_full_concurrent;
        bool bt_ant_couple_ok;
        __le32 kill_ack_mask;
        __le32 kill_cts_mask;
        __le16 bt_valid;
        u16 bt_on_thresh;
        u16 bt_duration;
        u16 dynamic_frag_thresh;
        u8 bt_ci_compliance;
        struct work_struct bt_traffic_change_work;
        bool bt_enable_pspoll;
        struct iwl_rxon_context *cur_rssi_ctx;
        bool bt_is_sco;

        struct iwl_hw_params hw_params;

        u32 inta_mask;

        struct workqueue_struct *workqueue;

        struct work_struct restart;
        struct work_struct scan_completed;
        struct work_struct rx_replenish;
        struct work_struct abort_scan;

        struct work_struct beacon_update;
        struct iwl_rxon_context *beacon_ctx;
        struct sk_buff *beacon_skb;
        void *beacon_cmd;

        struct work_struct tt_work;
        struct work_struct ct_enter;
        struct work_struct ct_exit;
        struct work_struct start_internal_scan;
        struct work_struct tx_flush;
        struct work_struct bt_full_concurrency;
        struct work_struct bt_runtime_config;

        struct tasklet_struct irq_tasklet;

        struct delayed_work scan_check;

        /* TX Power */
        s8 tx_power_user_lmt;
        s8 tx_power_device_lmt;
        s8 tx_power_lmt_in_half_dbm; /* max tx power in half-dBm format */
        s8 tx_power_next;


#ifdef CONFIG_IWLWIFI_DEBUG
        /* debugging info */
        u32 debug_level; /* per device debugging will override global
                            iwl_debug_level if set */
#endif /* CONFIG_IWLWIFI_DEBUG */
#ifdef CONFIG_IWLWIFI_DEBUGFS
        /* debugfs */
        u16 tx_traffic_idx;
        u16 rx_traffic_idx;
        u8 *tx_traffic;
        u8 *rx_traffic;
        struct dentry *debugfs_dir;
        u32 dbgfs_sram_offset, dbgfs_sram_len;
        bool disable_ht40;
#endif /* CONFIG_IWLWIFI_DEBUGFS */

        struct work_struct txpower_work;
        u32 disable_sens_cal;
        u32 disable_chain_noise_cal;
        struct work_struct run_time_calib_work;
        struct timer_list statistics_periodic;
        struct timer_list ucode_trace;
        struct timer_list watchdog;

        struct iwl_event_log event_log;

        struct led_classdev led;
        unsigned long blink_on, blink_off;
        bool led_registered;
#ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
        struct iwl_testmode_trace testmode_trace;
#endif
        u32 tm_fixed_rate;

}; /*iwl_priv */

static inline void iwl_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
{
        set_bit(txq_id, &priv->txq_ctx_active_msk);
}

static inline void iwl_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
{
        clear_bit(txq_id, &priv->txq_ctx_active_msk);
}

#ifdef CONFIG_IWLWIFI_DEBUG
/*
 * iwl_get_debug_level: Return active debug level for device
 *
 * Using sysfs it is possible to set per device debug level. This debug
 * level will be used if set, otherwise the global debug level which can be
 * set via module parameter is used.
 */
static inline u32 iwl_get_debug_level(struct iwl_priv *priv)
{
        if (priv->debug_level)
                return priv->debug_level;
        else
                return iwl_debug_level;
}
#else
static inline u32 iwl_get_debug_level(struct iwl_priv *priv)
{
        return iwl_debug_level;
}
#endif


static inline struct ieee80211_hdr *iwl_tx_queue_get_hdr(struct iwl_priv *priv,
                                                         int txq_id, int idx)
{
        if (priv->txq[txq_id].txb[idx].skb)
                return (struct ieee80211_hdr *)priv->txq[txq_id].
                                txb[idx].skb->data;
        return NULL;
}

static inline struct iwl_rxon_context *
iwl_rxon_ctx_from_vif(struct ieee80211_vif *vif)
{
        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;

        return vif_priv->ctx;
}

#define for_each_context(priv, ctx)                             \
        for (ctx = &priv->contexts[IWL_RXON_CTX_BSS];           \
             ctx < &priv->contexts[NUM_IWL_RXON_CTX]; ctx++)    \
                if (priv->valid_contexts & BIT(ctx->ctxid))

static inline int iwl_is_associated_ctx(struct iwl_rxon_context *ctx)
{
        return (ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK) ? 1 : 0;
}

static inline int iwl_is_associated(struct iwl_priv *priv,
                                    enum iwl_rxon_context_id ctxid)
{
        return iwl_is_associated_ctx(&priv->contexts[ctxid]);
}

static inline int iwl_is_any_associated(struct iwl_priv *priv)
{
        struct iwl_rxon_context *ctx;
        for_each_context(priv, ctx)
                if (iwl_is_associated_ctx(ctx))
                        return true;
        return false;
}

static inline int is_channel_valid(const struct iwl_channel_info *ch_info)
{
        if (ch_info == NULL)
                return 0;
        return (ch_info->flags & EEPROM_CHANNEL_VALID) ? 1 : 0;
}

static inline int is_channel_radar(const struct iwl_channel_info *ch_info)
{
        return (ch_info->flags & EEPROM_CHANNEL_RADAR) ? 1 : 0;
}

static inline u8 is_channel_a_band(const struct iwl_channel_info *ch_info)
{
        return ch_info->band == IEEE80211_BAND_5GHZ;
}

static inline u8 is_channel_bg_band(const struct iwl_channel_info *ch_info)
{
        return ch_info->band == IEEE80211_BAND_2GHZ;
}

static inline int is_channel_passive(const struct iwl_channel_info *ch)
{
        return (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) ? 1 : 0;
}

static inline int is_channel_ibss(const struct iwl_channel_info *ch)
{
        return ((ch->flags & EEPROM_CHANNEL_IBSS)) ? 1 : 0;
}

static inline void __iwl_free_pages(struct iwl_priv *priv, struct page *page)
{
        __free_pages(page, priv->hw_params.rx_page_order);
}

static inline void iwl_free_pages(struct iwl_priv *priv, unsigned long page)
{
        free_pages(page, priv->hw_params.rx_page_order);
}
#endif                          /* __iwl_dev_h__ */