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"
#include "iwl-bus.h"
#include "iwl-trans.h"
#include "iwl-shared.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

/* 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
 * @sta_id: valid if sched_retry is set
 * @tid: valid if sched_retry is set
 *
 * 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;

	u16 sta_id;
	u16 tid;
};

#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
/* re-uses the VO FIFO, uCode will properly flush/schedule */
#define IWL_TX_FIFO_AUX		5
#define IWL_TX_FIFO_UNUSED	-1

/* AUX (TX during scan dwell) queue */
#define IWL_AUX_QUEUE		10

/*
 * Minimum number of queues. MAX_NUM is defined in hw specific files.
 * Set the minimum to accommodate
 *  - 4 standard TX queues
 *  - the command queue
 *  - 4 PAN TX queues
 *  - the PAN multicast queue, and
 *  - the AUX (TX during scan dwell) queue.
 */
#define IWL_MIN_NUM_QUEUES	11

/*
 * 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

#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;
};

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_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,
	IWL_UCODE_TLV_WOWLAN_INST	= 16,
	IWL_UCODE_TLV_WOWLAN_DATA	= 17,
	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).
 * @IWL_UCODE_TLV_FLAGS_P2P: This uCode image supports P2P.
 */
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),
	IWL_UCODE_TLV_FLAGS_P2P		= BIT(3),
};

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)


/******************************************************************************
 *
 * 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,
};

/* 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;

	int beacon_int;

	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_ROC,
};

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

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

struct iwl_priv {

	/*data shared among all the driver's layers */
	struct iwl_shared _shrd;
	struct iwl_shared *shrd;

	/* 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;

	/*counters */
	u32 rx_handlers_stats[REPLY_MAX];

	/* 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 hcmd_lock;	/* protect hcmd */
	spinlock_t reg_lock;	/* protect hw register access */

	/*TODO: remove these pointers - use bus(priv) instead */
	struct iwl_bus *bus;	/* bus specific data */

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

	/* 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;
	struct fw_img ucode_wowlan;

	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;

	/* Tx DMA processing queues */
	struct iwl_tx_queue *txq;
	unsigned long txq_ctx_active_msk;