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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
     Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
     Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
     Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
     <http://rt2x00.serialmonkey.com>
 
  */
 
 /*
     Module: rt2x00
     Abstract: rt2x00 global information.
  */
 
 #ifndef RT2X00_H
 #define RT2X00_H
 
 #include <linux/bitops.h>
 #include <linux/interrupt.h>
 #include <linux/skbuff.h>
 #include <linux/workqueue.h>
 #include <linux/firmware.h>
 #include <linux/leds.h>
 #include <linux/mutex.h>
 #include <linux/etherdevice.h>
 #include <linux/kfifo.h>
 #include <linux/hrtimer.h>
 #include <linux/average.h>
 #include <linux/usb.h>
 #include <linux/clk.h>
 
 #include <net/mac80211.h>
 
 #include "rt2x00debug.h"
 #include "rt2x00dump.h"
 #include "rt2x00leds.h"
 #include "rt2x00reg.h"
 #include "rt2x00queue.h"
 
 /*
  * Module information.
  */
 #define DRV_VERSION "2.3.0"
 #define DRV_PROJECT "http://rt2x00.serialmonkey.com"
 
 /* Debug definitions.
  * Debug output has to be enabled during compile time.
  */
 #ifdef CONFIG_RT2X00_DEBUG
 #define DEBUG
 #endif /* CONFIG_RT2X00_DEBUG */
 
 /* Utility printing macros
  * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized
  */
 #define rt2x00_probe_err(fmt, ...)                  \
     printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt,        \
            __func__, ##__VA_ARGS__)
 #define rt2x00_err(dev, fmt, ...)                   \
     wiphy_err_ratelimited((dev)->hw->wiphy, "%s: Error - " fmt, \
           __func__, ##__VA_ARGS__)
 #define rt2x00_warn(dev, fmt, ...)                  \
     wiphy_warn_ratelimited((dev)->hw->wiphy, "%s: Warning - " fmt,  \
            __func__, ##__VA_ARGS__)
 #define rt2x00_info(dev, fmt, ...)                  \
     wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt,         \
            __func__, ##__VA_ARGS__)
 
 /* Various debug levels */
 #define rt2x00_dbg(dev, fmt, ...)                   \
     wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt,         \
           __func__, ##__VA_ARGS__)
 #define rt2x00_eeprom_dbg(dev, fmt, ...)                \
     wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt,   \
           __func__, ##__VA_ARGS__)
 
 /*
  * Duration calculations
  * The rate variable passed is: 100kbs.
  * To convert from bytes to bits we multiply size with 8,
  * then the size is multiplied with 10 to make the
  * real rate -> rate argument correction.
  */
 #define GET_DURATION(__size, __rate)    (((__size) * 8 * 10) / (__rate))
 #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
 
 /*
  * Determine the number of L2 padding bytes required between the header and
  * the payload.
  */
 #define L2PAD_SIZE(__hdrlen)    (-(__hdrlen) & 3)
 
 /*
  * Determine the alignment requirement,
  * to make sure the 802.11 payload is padded to a 4-byte boundrary
  * we must determine the address of the payload and calculate the
  * amount of bytes needed to move the data.
  */
 #define ALIGN_SIZE(__skb, __header) \
     (((unsigned long)((__skb)->data + (__header))) & 3)
 
 /*
  * Constants for extra TX headroom for alignment purposes.
  */
 #define RT2X00_ALIGN_SIZE   4 /* Only whole frame needs alignment */
 #define RT2X00_L2PAD_SIZE   8 /* Both header & payload need alignment */
 
 /*
  * Standard timing and size defines.
  * These values should follow the ieee80211 specifications.
  */
 #define ACK_SIZE        14
 #define IEEE80211_HEADER    24
 #define PLCP            48
 #define BEACON          100
 #define PREAMBLE        144
 #define SHORT_PREAMBLE      72
 #define SLOT_TIME       20
 #define SHORT_SLOT_TIME     9
 #define SIFS            10
 #define PIFS            (SIFS + SLOT_TIME)
 #define SHORT_PIFS      (SIFS + SHORT_SLOT_TIME)
 #define DIFS            (PIFS + SLOT_TIME)
 #define SHORT_DIFS      (SHORT_PIFS + SHORT_SLOT_TIME)
 #define EIFS            (SIFS + DIFS + \
                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
 #define SHORT_EIFS      (SIFS + SHORT_DIFS + \
                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
 
 enum rt2x00_chip_intf {
     RT2X00_CHIP_INTF_PCI,
     RT2X00_CHIP_INTF_PCIE,
     RT2X00_CHIP_INTF_USB,
     RT2X00_CHIP_INTF_SOC,
 };
 
 /*
  * Chipset identification
  * The chipset on the device is composed of a RT and RF chip.
  * The chipset combination is important for determining device capabilities.
  */
 struct rt2x00_chip {
     u16 rt;
 #define RT2460      0x2460
 #define RT2560      0x2560
 #define RT2570      0x2570
 #define RT2661      0x2661
 #define RT2573      0x2573
 #define RT2860      0x2860  /* 2.4GHz */
 #define RT2872      0x2872  /* WSOC */
 #define RT2883      0x2883  /* WSOC */
 #define RT3070      0x3070
 #define RT3071      0x3071
 #define RT3090      0x3090  /* 2.4GHz PCIe */
 #define RT3290      0x3290
 #define RT3352      0x3352  /* WSOC */
 #define RT3390      0x3390
 #define RT3572      0x3572
 #define RT3593      0x3593
 #define RT3883      0x3883  /* WSOC */
 #define RT5350      0x5350  /* WSOC 2.4GHz */
 #define RT5390      0x5390  /* 2.4GHz */
 #define RT5392      0x5392  /* 2.4GHz */
 #define RT5592      0x5592
 #define RT6352      0x6352  /* WSOC 2.4GHz */
 
     u16 rf;
     u16 rev;
 
     enum rt2x00_chip_intf intf;
 };
 
 /*
  * RF register values that belong to a particular channel.
  */
 struct rf_channel {
     int channel;
     u32 rf1;
     u32 rf2;
     u32 rf3;
     u32 rf4;
 };
 
 /*
  * Information structure for channel survey.
  */
 struct rt2x00_chan_survey {
     u64 time_idle;
     u64 time_busy;
     u64 time_ext_busy;
 };
 
 /*
  * Channel information structure
  */
 struct channel_info {
     unsigned int flags;
 #define GEOGRAPHY_ALLOWED   0x00000001
 
     short max_power;
     short default_power1;
     short default_power2;
     short default_power3;
 };
 
 /*
  * Antenna setup values.
  */
 struct antenna_setup {
     enum antenna rx;
     enum antenna tx;
     u8 rx_chain_num;
     u8 tx_chain_num;
 };
 
 /*
  * Quality statistics about the currently active link.
  */
 struct link_qual {
     /*
      * Statistics required for Link tuning by driver
      * The rssi value is provided by rt2x00lib during the
      * link_tuner() callback function.
      * The false_cca field is filled during the link_stats()
      * callback function and could be used during the
      * link_tuner() callback function.
      */
     int rssi;
     int false_cca;
 
     /*
      * VGC levels
      * Hardware driver will tune the VGC level during each call
      * to the link_tuner() callback function. This vgc_level is
      * determined based on the link quality statistics like
      * average RSSI and the false CCA count.
      *
      * In some cases the drivers need to differentiate between
      * the currently "desired" VGC level and the level configured
      * in the hardware. The latter is important to reduce the
      * number of BBP register reads to reduce register access
      * overhead. For this reason we store both values here.
      */
     u8 vgc_level;
     u8 vgc_level_reg;
 
     /*
      * Statistics required for Signal quality calculation.
      * These fields might be changed during the link_stats()
      * callback function.
      */
     int rx_success;
     int rx_failed;
     int tx_success;
     int tx_failed;
 };
 
 DECLARE_EWMA(rssi, 10, 8)
 
 /*
  * Antenna settings about the currently active link.
  */
 struct link_ant {
     /*
      * Antenna flags
      */
     unsigned int flags;
 #define ANTENNA_RX_DIVERSITY    0x00000001
 #define ANTENNA_TX_DIVERSITY    0x00000002
 #define ANTENNA_MODE_SAMPLE 0x00000004
 
     /*
      * Currently active TX/RX antenna setup.
      * When software diversity is used, this will indicate
      * which antenna is actually used at this time.
      */
     struct antenna_setup active;
 
     /*
      * RSSI history information for the antenna.
      * Used to determine when to switch antenna
      * when using software diversity.
      */
     int rssi_history;
 
     /*
      * Current RSSI average of the currently active antenna.
      * Similar to the avg_rssi in the link_qual structure
      * this value is updated by using the walking average.
      */
     struct ewma_rssi rssi_ant;
 };
 
 /*
  * To optimize the quality of the link we need to store
  * the quality of received frames and periodically
  * optimize the link.
  */
 struct link {
     /*
      * Link tuner counter
      * The number of times the link has been tuned
      * since the radio has been switched on.
      */
     u32 count;
 
     /*
      * Quality measurement values.
      */
     struct link_qual qual;
 
     /*
      * TX/RX antenna setup.
      */
     struct link_ant ant;
 
     /*
      * Currently active average RSSI value
      */
     struct ewma_rssi avg_rssi;
 
     /*
      * Work structure for scheduling periodic link tuning.
      */
     struct delayed_work work;
 
     /*
      * Work structure for scheduling periodic watchdog monitoring.
      * This work must be scheduled on the kernel workqueue, while
      * all other work structures must be queued on the mac80211
      * workqueue. This guarantees that the watchdog can schedule
      * other work structures and wait for their completion in order
      * to bring the device/driver back into the desired state.
      */
     struct delayed_work watchdog_work;
     unsigned int watchdog_interval;
     bool watchdog_disabled;
 
     /*
      * Work structure for scheduling periodic AGC adjustments.
      */
     struct delayed_work agc_work;
 
     /*
      * Work structure for scheduling periodic VCO calibration.
      */
     struct delayed_work vco_work;
 };
 
 enum rt2x00_delayed_flags {
     DELAYED_UPDATE_BEACON,
 };
 
 /*
  * Interface structure
  * Per interface configuration details, this structure
  * is allocated as the private data for ieee80211_vif.
  */
 struct rt2x00_intf {
     /*
      * beacon->skb must be protected with the mutex.
      */
     struct mutex beacon_skb_mutex;
 
     /*
      * Entry in the beacon queue which belongs to
      * this interface. Each interface has its own
      * dedicated beacon entry.
      */
     struct queue_entry *beacon;
     bool enable_beacon;
 
     /*
      * Actions that needed rescheduling.
      */
     unsigned long delayed_flags;
 
     /*
      * Software sequence counter, this is only required
      * for hardware which doesn't support hardware
      * sequence counting.
      */
     atomic_t seqno;
 };
 
 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
 {
     return (struct rt2x00_intf *)vif->drv_priv;
 }
 
 /**
  * struct hw_mode_spec: Hardware specifications structure
  *
  * Details about the supported modes, rates and channels
  * of a particular chipset. This is used by rt2x00lib
  * to build the ieee80211_hw_mode array for mac80211.
  *
  * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
  * @supported_rates: Rate types which are supported (CCK, OFDM).
  * @num_channels: Number of supported channels. This is used as array size
  *  for @tx_power_a, @tx_power_bg and @channels.
  * @channels: Device/chipset specific channel values (See &struct rf_channel).
  * @channels_info: Additional information for channels (See &struct channel_info).
  * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
  */
 struct hw_mode_spec {
     unsigned int supported_bands;
 #define SUPPORT_BAND_2GHZ   0x00000001
 #define SUPPORT_BAND_5GHZ   0x00000002
 
     unsigned int supported_rates;
 #define SUPPORT_RATE_CCK    0x00000001
 #define SUPPORT_RATE_OFDM   0x00000002
 
     unsigned int num_channels;
     const struct rf_channel *channels;
     const struct channel_info *channels_info;
 
     struct ieee80211_sta_ht_cap ht;
 };
 
 /*
  * Configuration structure wrapper around the
  * mac80211 configuration structure.
  * When mac80211 configures the driver, rt2x00lib
  * can precalculate values which are equal for all
  * rt2x00 drivers. Those values can be stored in here.
  */
 struct rt2x00lib_conf {
     struct ieee80211_conf *conf;
 
     struct rf_channel rf;
     struct channel_info channel;
 };
 
 /*
  * Configuration structure for erp settings.
  */
 struct rt2x00lib_erp {
     int short_preamble;
     int cts_protection;
 
     u32 basic_rates;
 
     int slot_time;
 
     short sifs;
     short pifs;
     short difs;
     short eifs;
 
     u16 beacon_int;
     u16 ht_opmode;
 };
 
 /*
  * Configuration structure for hardware encryption.
  */
 struct rt2x00lib_crypto {
     enum cipher cipher;
 
     enum set_key_cmd cmd;
     const u8 *address;
 
     u32 bssidx;
 
     u8 key[16];
     u8 tx_mic[8];
     u8 rx_mic[8];
 
     int wcid;
 };
 
 /*
  * Configuration structure wrapper around the
  * rt2x00 interface configuration handler.
  */
 struct rt2x00intf_conf {
     /*
      * Interface type
      */
     enum nl80211_iftype type;
 
     /*
      * TSF sync value, this is dependent on the operation type.
      */
     enum tsf_sync sync;
 
     /*
      * The MAC and BSSID addresses are simple array of bytes,
      * these arrays are little endian, so when sending the addresses
      * to the drivers, copy the it into a endian-signed variable.
      *
      * Note that all devices (except rt2500usb) have 32 bits
      * register word sizes. This means that whatever variable we
      * pass _must_ be a multiple of 32 bits. Otherwise the device
      * might not accept what we are sending to it.
      * This will also make it easier for the driver to write
      * the data to the device.
      */
     __le32 mac[2];
     __le32 bssid[2];
 };
 
 /*
  * Private structure for storing STA details
  * wcid: Wireless Client ID
  */
 struct rt2x00_sta {
     int wcid;
 };
 
 static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta)
 {
     return (struct rt2x00_sta *)sta->drv_priv;
 }
 
 /*
  * rt2x00lib callback functions.
  */
 struct rt2x00lib_ops {
     /*
      * Interrupt handlers.
      */
     irq_handler_t irq_handler;
 
     /*
      * TX status tasklet handler.
      */
     void (*txstatus_tasklet) (struct tasklet_struct *t);
     void (*pretbtt_tasklet) (struct tasklet_struct *t);
     void (*tbtt_tasklet) (struct tasklet_struct *t);
     void (*rxdone_tasklet) (struct tasklet_struct *t);
     void (*autowake_tasklet) (struct tasklet_struct *t);
 
     /*
      * Device init handlers.
      */
     int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
     char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
     int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
                    const u8 *data, const size_t len);
     int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
                   const u8 *data, const size_t len);
 
     /*
      * Device initialization/deinitialization handlers.
      */
     int (*initialize) (struct rt2x00_dev *rt2x00dev);
     void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 
     /*
      * queue initialization handlers
      */
     bool (*get_entry_state) (struct queue_entry *entry);
     void (*clear_entry) (struct queue_entry *entry);
 
     /*
      * Radio control handlers.
      */
     int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
                  enum dev_state state);
     int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
     void (*link_stats) (struct rt2x00_dev *rt2x00dev,
                 struct link_qual *qual);
     void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
                  struct link_qual *qual);
     void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
                 struct link_qual *qual, const u32 count);
     void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
     void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
 
     /*
      * Data queue handlers.
      */
     void (*watchdog) (struct rt2x00_dev *rt2x00dev);
     void (*start_queue) (struct data_queue *queue);
     void (*kick_queue) (struct data_queue *queue);
     void (*stop_queue) (struct data_queue *queue);
     void (*flush_queue) (struct data_queue *queue, bool drop);
     void (*tx_dma_done) (struct queue_entry *entry);
 
     /*
      * TX control handlers
      */
     void (*write_tx_desc) (struct queue_entry *entry,
                    struct txentry_desc *txdesc);
     void (*write_tx_data) (struct queue_entry *entry,
                    struct txentry_desc *txdesc);
     void (*write_beacon) (struct queue_entry *entry,
                   struct txentry_desc *txdesc);
     void (*clear_beacon) (struct queue_entry *entry);
     int (*get_tx_data_len) (struct queue_entry *entry);
 
     /*
      * RX control handlers
      */
     void (*fill_rxdone) (struct queue_entry *entry,
                  struct rxdone_entry_desc *rxdesc);
 
     /*
      * Configuration handlers.
      */
     int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
                   struct rt2x00lib_crypto *crypto,
                   struct ieee80211_key_conf *key);
     int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
                     struct rt2x00lib_crypto *crypto,
                     struct ieee80211_key_conf *key);
     void (*config_filter) (struct rt2x00_dev *rt2x00dev,
                    const unsigned int filter_flags);
     void (*config_intf) (struct rt2x00_dev *rt2x00dev,
                  struct rt2x00_intf *intf,
                  struct rt2x00intf_conf *conf,
                  const unsigned int flags);
 #define CONFIG_UPDATE_TYPE      ( 1 << 1 )
 #define CONFIG_UPDATE_MAC       ( 1 << 2 )
 #define CONFIG_UPDATE_BSSID     ( 1 << 3 )
 
     void (*config_erp) (struct rt2x00_dev *rt2x00dev,
                 struct rt2x00lib_erp *erp,
                 u32 changed);
     void (*config_ant) (struct rt2x00_dev *rt2x00dev,
                 struct antenna_setup *ant);
     void (*config) (struct rt2x00_dev *rt2x00dev,
             struct rt2x00lib_conf *libconf,
             const unsigned int changed_flags);
     void (*pre_reset_hw) (struct rt2x00_dev *rt2x00dev);
     int (*sta_add) (struct rt2x00_dev *rt2x00dev,
             struct ieee80211_vif *vif,
             struct ieee80211_sta *sta);
     int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
                struct ieee80211_sta *sta);
 };
 
 /*
  * rt2x00 driver callback operation structure.
  */
 struct rt2x00_ops {
     const char *name;
     const unsigned int drv_data_size;
     const unsigned int max_ap_intf;
     const unsigned int eeprom_size;
     const unsigned int rf_size;
     const unsigned int tx_queues;
     void (*queue_init)(struct data_queue *queue);
     const struct rt2x00lib_ops *lib;
     const void *drv;
     const struct ieee80211_ops *hw;
 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
     const struct rt2x00debug *debugfs;
 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 };
 
 /*
  * rt2x00 state flags
  */
 enum rt2x00_state_flags {
     /*
      * Device flags
      */
     DEVICE_STATE_PRESENT,
     DEVICE_STATE_REGISTERED_HW,
     DEVICE_STATE_INITIALIZED,
     DEVICE_STATE_STARTED,
     DEVICE_STATE_ENABLED_RADIO,
     DEVICE_STATE_SCANNING,
     DEVICE_STATE_FLUSHING,
     DEVICE_STATE_RESET,
 
     /*
      * Driver configuration
      */
     CONFIG_CHANNEL_HT40,
     CONFIG_POWERSAVING,
     CONFIG_HT_DISABLED,
     CONFIG_MONITORING,
 
     /*
      * Mark we currently are sequentially reading TX_STA_FIFO register
      * FIXME: this is for only rt2800usb, should go to private data
      */
     TX_STATUS_READING,
 };
 
 /*
  * rt2x00 capability flags
  */
 enum rt2x00_capability_flags {
     /*
      * Requirements
      */
     REQUIRE_FIRMWARE,
     REQUIRE_BEACON_GUARD,
     REQUIRE_ATIM_QUEUE,
     REQUIRE_DMA,
     REQUIRE_COPY_IV,
     REQUIRE_L2PAD,
     REQUIRE_TXSTATUS_FIFO,
     REQUIRE_TASKLET_CONTEXT,
     REQUIRE_SW_SEQNO,
     REQUIRE_HT_TX_DESC,
     REQUIRE_PS_AUTOWAKE,
     REQUIRE_DELAYED_RFKILL,
 
     /*
      * Capabilities
      */
     CAPABILITY_HW_BUTTON,
     CAPABILITY_HW_CRYPTO,
     CAPABILITY_POWER_LIMIT,
     CAPABILITY_CONTROL_FILTERS,
     CAPABILITY_CONTROL_FILTER_PSPOLL,
     CAPABILITY_PRE_TBTT_INTERRUPT,
     CAPABILITY_LINK_TUNING,
     CAPABILITY_FRAME_TYPE,
     CAPABILITY_RF_SEQUENCE,
     CAPABILITY_EXTERNAL_LNA_A,
     CAPABILITY_EXTERNAL_LNA_BG,
     CAPABILITY_DOUBLE_ANTENNA,
     CAPABILITY_BT_COEXIST,
     CAPABILITY_VCO_RECALIBRATION,
     CAPABILITY_EXTERNAL_PA_TX0,
     CAPABILITY_EXTERNAL_PA_TX1,
     CAPABILITY_RESTART_HW,
 };
 
 /*
  * Interface combinations
  */
 enum {
     IF_COMB_AP = 0,
     NUM_IF_COMB,
 };
 
 /*
  * rt2x00 device structure.
  */
 struct rt2x00_dev {
     /*
      * Device structure.
      * The structure stored in here depends on the
      * system bus (PCI or USB).
      * When accessing this variable, the rt2x00dev_{pci,usb}
      * macros should be used for correct typecasting.
      */
     struct device *dev;
 
     /*
      * Callback functions.
      */
     const struct rt2x00_ops *ops;
 
     /*
      * Driver data.
      */
     void *drv_data;
 
     /*
      * IEEE80211 control structure.
      */
     struct ieee80211_hw *hw;
     struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
     struct rt2x00_chan_survey *chan_survey;
     enum nl80211_band curr_band;
     int curr_freq;
 
     /*
      * If enabled, the debugfs interface structures
      * required for deregistration of debugfs.
      */
 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
     struct rt2x00debug_intf *debugfs_intf;
 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 
     /*
      * LED structure for changing the LED status
      * by mac8011 or the kernel.
      */
 #ifdef CONFIG_RT2X00_LIB_LEDS
     struct rt2x00_led led_radio;
     struct rt2x00_led led_assoc;
     struct rt2x00_led led_qual;
     u16 led_mcu_reg;
 #endif /* CONFIG_RT2X00_LIB_LEDS */
 
     /*
      * Device state flags.
      * In these flags the current status is stored.
      * Access to these flags should occur atomically.
      */
     unsigned long flags;
 
     /*
      * Device capabiltiy flags.
      * In these flags the device/driver capabilities are stored.
      * Access to these flags should occur non-atomically.
      */
     unsigned long cap_flags;
 
     /*
      * Device information, Bus IRQ and name (PCI, SoC)
      */
     int irq;
     const char *name;
 
     /*
      * Chipset identification.
      */
     struct rt2x00_chip chip;
 
     /*
      * hw capability specifications.
      */
     struct hw_mode_spec spec;
 
     /*
      * This is the default TX/RX antenna setup as indicated
      * by the device's EEPROM.
      */
     struct antenna_setup default_ant;
 
     /*
      * Register pointers
      * csr.base: CSR base register address. (PCI)
      * csr.cache: CSR cache for usb_control_msg. (USB)
      */
     union csr {
         void __iomem *base;
         void *cache;
     } csr;
 
     /*
      * Mutex to protect register accesses.
      * For PCI and USB devices it protects against concurrent indirect
      * register access (BBP, RF, MCU) since accessing those
      * registers require multiple calls to the CSR registers.
      * For USB devices it also protects the csr_cache since that
      * field is used for normal CSR access and it cannot support
      * multiple callers simultaneously.
      */
     struct mutex csr_mutex;
 
     /*
      * Mutex to synchronize config and link tuner.
      */
     struct mutex conf_mutex;
     /*
      * Current packet filter configuration for the device.
      * This contains all currently active FIF_* flags send
      * to us by mac80211 during configure_filter().
      */
     unsigned int packet_filter;
 
     /*
      * Interface details:
      *  - Open ap interface count.
      *  - Open sta interface count.
      *  - Association count.
      *  - Beaconing enabled count.
      */
     unsigned int intf_ap_count;
     unsigned int intf_sta_count;
     unsigned int intf_associated;
     unsigned int intf_beaconing;
 
     /*
      * Interface combinations
      */
     struct ieee80211_iface_limit if_limits_ap;
     struct ieee80211_iface_combination if_combinations[NUM_IF_COMB];
 
     /*
      * Link quality
      */
     struct link link;
 
     /*
      * EEPROM data.
      */
     __le16 *eeprom;
 
     /*
      * Active RF register values.
      * These are stored here so we don't need
      * to read the rf registers and can directly
      * use this value instead.
      * This field should be accessed by using
      * rt2x00_rf_read() and rt2x00_rf_write().
      */
     u32 *rf;
 
     /*
      * LNA gain
      */
     short lna_gain;
 
     /*
      * Current TX power value.
      */
     u16 tx_power;
 
     /*
      * Current retry values.
      */
     u8 short_retry;
     u8 long_retry;
 
     /*
      * Rssi <-> Dbm offset
      */
     u8 rssi_offset;
 
     /*
      * Frequency offset.
      */
     u8 freq_offset;
 
     /*
      * Association id.
      */
     u16 aid;
 
     /*
      * Beacon interval.
      */
     u16 beacon_int;
 
     /**
      * Timestamp of last received beacon
      */
     unsigned long last_beacon;
 
     /*
      * Low level statistics which will have
      * to be kept up to date while device is running.
      */
     struct ieee80211_low_level_stats low_level_stats;
 
     /**
      * Work queue for all work which should not be placed
      * on the mac80211 workqueue (because of dependencies
      * between various work structures).
      */
     struct workqueue_struct *workqueue;
 
     /*
      * Scheduled work.
      * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
      * which means it cannot be placed on the hw->workqueue
      * due to RTNL locking requirements.
      */
     struct work_struct intf_work;
 
     /**
      * Scheduled work for TX/RX done handling (USB devices)
      */
     struct work_struct rxdone_work;
     struct work_struct txdone_work;
 
     /*
      * Powersaving work
      */
     struct delayed_work autowakeup_work;
     struct work_struct sleep_work;
 
     /*
      * Data queue arrays for RX, TX, Beacon and ATIM.
      */
     unsigned int data_queues;
     struct data_queue *rx;
     struct data_queue *tx;
     struct data_queue *bcn;
     struct data_queue *atim;
 
     /*
      * Firmware image.
      */
     const struct firmware *fw;
 
     /*
      * FIFO for storing tx status reports between isr and tasklet.
      */
     DECLARE_KFIFO_PTR(txstatus_fifo, u32);
 
     /*
      * Timer to ensure tx status reports are read (rt2800usb).
      */
     struct hrtimer txstatus_timer;
 
     /*
      * Tasklet for processing tx status reports (rt2800pci).
      */
     struct tasklet_struct txstatus_tasklet;
     struct tasklet_struct pretbtt_tasklet;
     struct tasklet_struct tbtt_tasklet;
     struct tasklet_struct rxdone_tasklet;
     struct tasklet_struct autowake_tasklet;
 
     /*
      * Used for VCO periodic calibration.
      */
     int rf_channel;
 
     /*
      * Protect the interrupt mask register.
      */
     spinlock_t irqmask_lock;
 
     /*
      * List of BlockAckReq TX entries that need driver BlockAck processing.
      */
     struct list_head bar_list;
     spinlock_t bar_list_lock;
 
     /* Extra TX headroom required for alignment purposes. */
     unsigned int extra_tx_headroom;
 
     struct usb_anchor *anchor;
     unsigned int num_proto_errs;
 
     /* Clock for System On Chip devices. */
     struct clk *clk;
 };
 
 struct rt2x00_bar_list_entry {
     struct list_head list;
     struct rcu_head head;
 
     struct queue_entry *entry;
     int block_acked;
 
     /* Relevant parts of the IEEE80211 BAR header */
     __u8 ra[6];
     __u8 ta[6];
     __le16 control;
     __le16 start_seq_num;
 };
 
 /*
  * Register defines.
  * Some registers require multiple attempts before success,
  * in those cases REGISTER_BUSY_COUNT attempts should be
  * taken with a REGISTER_BUSY_DELAY interval. Due to USB
  * bus delays, we do not have to loop so many times to wait
  * for valid register value on that bus.
  */
 #define REGISTER_BUSY_COUNT 100
 #define REGISTER_USB_BUSY_COUNT 20
 #define REGISTER_BUSY_DELAY 100
 
 /*
  * Generic RF access.
  * The RF is being accessed by word index.
  */
 static inline u32 rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
                  const unsigned int word)
 {
     BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
     return rt2x00dev->rf[word - 1];
 }
 
 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
                    const unsigned int word, u32 data)
 {
     BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
     rt2x00dev->rf[word - 1] = data;
 }
 
 /*
  * Generic EEPROM access. The EEPROM is being accessed by word or byte index.
  */
 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
                        const unsigned int word)
 {
     return (void *)&rt2x00dev->eeprom[word];
 }
 
 static inline u16 rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
                      const unsigned int word)
 {
     return le16_to_cpu(rt2x00dev->eeprom[word]);
 }
 
 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
                        const unsigned int word, u16 data)
 {
     rt2x00dev->eeprom[word] = cpu_to_le16(data);
 }
 
 static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
                     const unsigned int byte)
 {
     return *(((u8 *)rt2x00dev->eeprom) + byte);
 }
 
 /*
  * Chipset handlers
  */
 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
                    const u16 rt, const u16 rf, const u16 rev)
 {
     rt2x00dev->chip.rt = rt;
     rt2x00dev->chip.rf = rf;
     rt2x00dev->chip.rev = rev;
 
     rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n",
             rt2x00dev->chip.rt, rt2x00dev->chip.rf,
             rt2x00dev->chip.rev);
 }
 
 static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev,
                  const u16 rt, const u16 rev)
 {
     rt2x00dev->chip.rt = rt;
     rt2x00dev->chip.rev = rev;
 
     rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n",
             rt2x00dev->chip.rt, rt2x00dev->chip.rev);
 }
 
 static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
 {
     rt2x00dev->chip.rf = rf;
 
     rt2x00_info(rt2x00dev, "RF chipset %04x detected\n",
             rt2x00dev->chip.rf);
 }
 
 static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
 {
     return (rt2x00dev->chip.rt == rt);
 }
 
 static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
 {
     return (rt2x00dev->chip.rf == rf);
 }
 
 static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00dev->chip.rev;
 }
 
 static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
                  const u16 rt, const u16 rev)
 {
     return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
 }
 
 static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
                     const u16 rt, const u16 rev)
 {
     return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
 }
 
 static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
                      const u16 rt, const u16 rev)
 {
     return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
 }
 
 static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
                     enum rt2x00_chip_intf intf)
 {
     rt2x00dev->chip.intf = intf;
 }
 
 static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
                    enum rt2x00_chip_intf intf)
 {
     return (rt2x00dev->chip.intf == intf);
 }
 
 static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
            rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
 }
 
 static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
 }
 
 static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
 }
 
 static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
 }
 
 /* Helpers for capability flags */
 
 static inline bool
 rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev,
             enum rt2x00_capability_flags cap_flag)
 {
     return test_bit(cap_flag, &rt2x00dev->cap_flags);
 }
 
 static inline bool
 rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
 }
 
 static inline bool
 rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
 }
 
 static inline bool
 rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
 }
 
 static inline bool
 rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
 }
 
 static inline bool
 rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
 }
 
 static inline bool
 rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
 }
 
 static inline bool
 rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
 }
 
 static inline bool
 rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
 }
 
 static inline bool
 rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
 }
 
 static inline bool
 rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
 }
 
 static inline bool
 rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
 }
 
 static inline bool
 rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
 }
 
 static inline bool
 rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
 }
 
 static inline bool
 rt2x00_has_cap_restart_hw(struct rt2x00_dev *rt2x00dev)
 {
     return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RESTART_HW);
 }
 
 /**
  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
  * @entry: Pointer to &struct queue_entry
  *
  * Returns -ENOMEM if mapping fail, 0 otherwise.
  */
 int rt2x00queue_map_txskb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_unmap_skb - Unmap a skb from DMA.
  * @entry: Pointer to &struct queue_entry
  */
 void rt2x00queue_unmap_skb(struct queue_entry *entry);
 
 /**
  * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  * @queue: rt2x00 queue index (see &enum data_queue_qid).
  *
  * Returns NULL for non tx queues.
  */
 static inline struct data_queue *
 rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
              const enum data_queue_qid queue)
 {
     if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
         return &rt2x00dev->tx[queue];
 
     if (queue == QID_ATIM)
         return rt2x00dev->atim;
 
     return NULL;
 }
 
 /**
  * rt2x00queue_get_entry - Get queue entry where the given index points to.
  * @queue: Pointer to &struct data_queue from where we obtain the entry.
  * @index: Index identifier for obtaining the correct index.
  */
 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
                       enum queue_index index);
 
 /**
  * rt2x00queue_pause_queue - Pause a data queue
  * @queue: Pointer to &struct data_queue.
  *
  * This function will pause the data queue locally, preventing
  * new frames to be added to the queue (while the hardware is
  * still allowed to run).
  */
 void rt2x00queue_pause_queue(struct data_queue *queue);
 
 /**
  * rt2x00queue_unpause_queue - unpause a data queue
  * @queue: Pointer to &struct data_queue.
  *
  * This function will unpause the data queue locally, allowing
  * new frames to be added to the queue again.
  */
 void rt2x00queue_unpause_queue(struct data_queue *queue);
 
 /**
  * rt2x00queue_start_queue - Start a data queue
  * @queue: Pointer to &struct data_queue.
  *
  * This function will start handling all pending frames in the queue.
  */
 void rt2x00queue_start_queue(struct data_queue *queue);
 
 /**
  * rt2x00queue_stop_queue - Halt a data queue
  * @queue: Pointer to &struct data_queue.
  *
  * This function will stop all pending frames in the queue.
  */
 void rt2x00queue_stop_queue(struct data_queue *queue);
 
 /**
  * rt2x00queue_flush_queue - Flush a data queue
  * @queue: Pointer to &struct data_queue.
  * @drop: True to drop all pending frames.
  *
  * This function will flush the queue. After this call
  * the queue is guaranteed to be empty.
  */
 void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
 
 /**
  * rt2x00queue_start_queues - Start all data queues
  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  *
  * This function will loop through all available queues to start them
  */
 void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
 
 /**
  * rt2x00queue_stop_queues - Halt all data queues
  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  *
  * This function will loop through all available queues to stop
  * any pending frames.
  */
 void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
 
 /**
  * rt2x00queue_flush_queues - Flush all data queues
  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  * @drop: True to drop all pending frames.
  *
  * This function will loop through all available queues to flush
  * any pending frames.
  */
 void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
 
 /*
  * Debugfs handlers.
  */
 /**
  * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  * @type: The type of frame that is being dumped.
  * @entry: The queue entry containing the frame to be dumped.
  */
 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
                 enum rt2x00_dump_type type, struct queue_entry *entry);
 #else
 static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
                       enum rt2x00_dump_type type,
                       struct queue_entry *entry)
 {
 }
 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 
 /*
  * Utility functions.
  */
 u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
              struct ieee80211_vif *vif);
 void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr);
 
 /*
  * Interrupt context handlers.
  */
 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
 void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
 void rt2x00lib_dmastart(struct queue_entry *entry);
 void rt2x00lib_dmadone(struct queue_entry *entry);
 void rt2x00lib_txdone(struct queue_entry *entry,
               struct txdone_entry_desc *txdesc);
 void rt2x00lib_txdone_nomatch(struct queue_entry *entry,
                   struct txdone_entry_desc *txdesc);
 void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
 void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp);
 
 /*
  * mac80211 handlers.
  */
 void rt2x00mac_tx(struct ieee80211_hw *hw,
           struct ieee80211_tx_control *control,
           struct sk_buff *skb);
 int rt2x00mac_start(struct ieee80211_hw *hw);
 void rt2x00mac_stop(struct ieee80211_hw *hw);
 void rt2x00mac_reconfig_complete(struct ieee80211_hw *hw,
                  enum ieee80211_reconfig_type reconfig_type);
 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
                 struct ieee80211_vif *vif);
 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
                 struct ieee80211_vif *vif);
 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
                 unsigned int changed_flags,
                 unsigned int *total_flags,
                 u64 multicast);
 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
               bool set);
 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
               struct ieee80211_vif *vif, struct ieee80211_sta *sta,
               struct ieee80211_key_conf *key);
 #else
 #define rt2x00mac_set_key   NULL
 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
                  struct ieee80211_vif *vif,
                  const u8 *mac_addr);
 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
                 struct ieee80211_vif *vif);
 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
             struct ieee80211_low_level_stats *stats);
 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
                 struct ieee80211_vif *vif,
                 struct ieee80211_bss_conf *bss_conf,
                 u64 changes);
 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
               struct ieee80211_vif *vif,
               unsigned int link_id, u16 queue,
               const struct ieee80211_tx_queue_params *params);
 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
              u32 queues, bool drop);
 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
                  u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
 
 /*
  * Driver allocation handlers.
  */
 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
 
 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev);
 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
 
 #endif /* RT2X00_H */

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