cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/wireless/ralink/rt2x00/rt2x00.h

Directory: drivers/net/wireless/ralink/rt2x00
/*
        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>

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        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, see <http://www.gnu.org/licenses/>.
 */

/*
        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/input-polldev.h>
#include <linux/kfifo.h>
#include <linux/hrtimer.h>
#include <linux/average.h>
#include <linux/usb.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((dev)->hw->wiphy, "%s: Error - " fmt,                 \
                  __func__, ##__VA_ARGS__)

#define rt2x00_warn(dev, fmt, ...)					\
	wiphy_warn((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 RT5390		0x5390  /* 2.4GHz */

#define RT5392		0x5392  /* 2.4GHz */

#define RT5592		0x5592

	
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;
};

/*
 * 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
         * 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, 1024, 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;

	/*
         * 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;
}


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/**
 * 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;
}


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/*
 * rt2x00lib callback functions.
 */

struct rt2x00lib_ops {
	/*
         * Interrupt handlers.
         */
	
irq_handler_t irq_handler;

	/*
         * TX status tasklet handler.
         */
	
void (*txstatus_tasklet) (unsigned long data);
	
void (*pretbtt_tasklet) (unsigned long data);
	
void (*tbtt_tasklet) (unsigned long data);
	
void (*rxdone_tasklet) (unsigned long data);
	
void (*autowake_tasklet) (unsigned long data);

	/*
         * 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);
	
int (*sta_add) (struct rt2x00_dev *rt2x00dev,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta);
	
int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
			   int wcid);
};

/*
 * 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,

	/*
         * Driver configuration
         */
	
CONFIG_CHANNEL_HT40,
	
CONFIG_POWERSAVING,
	
CONFIG_HT_DISABLED,
	
CONFIG_QOS_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,
};

/*
 * 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];
	
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;

	/*
         * 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;
};


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 void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
				  const unsigned int word, u32 *data)
{
	BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
	*data = rt2x00dev->rf[word - 1];
}


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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;
}


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/*
 * 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];
}


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static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
				      const unsigned int word, u16 *data)
{
	*data = le16_to_cpu(rt2x00dev->eeprom[word]);
}


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static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
				       const unsigned int word, u16 data)
{
	rt2x00dev->eeprom[word] = cpu_to_le16(data);
}


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static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
				    const unsigned int byte)
{
	return *(((u8 *)rt2x00dev->eeprom) + byte);
}


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/*
 * 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);
}


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joe perchesjoe perches22.74%125.00%


Total73100.00%4100.00%






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);
}


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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);
}


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static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
{
	return (rt2x00dev->chip.rt == rt);
}


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static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
{
	return (rt2x00dev->chip.rf == rf);
}


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static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00dev->chip.rev;
}


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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);
}


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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);
}


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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);
}


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static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
					enum rt2x00_chip_intf intf)
{
	rt2x00dev->chip.intf = intf;
}


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static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
			       enum rt2x00_chip_intf intf)
{
	return (rt2x00dev->chip.intf == intf);
}


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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);
}


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static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
}


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Total20100.00%2100.00%






static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
}


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static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
}


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/* 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);
}


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static inline bool

rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
}


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static inline bool

rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
}


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static inline bool

rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
}


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static inline bool

rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
}


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static inline bool

rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
}


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static inline bool

rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
}


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static inline bool

rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
}


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static inline bool

rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
}


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static inline bool

rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
}


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static inline bool

rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
}


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static inline bool

rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
}


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static inline bool

rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
}


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static inline bool

rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
{
	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
}


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/**
 * 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;
}


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/**
 * 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.
 * @skb: The skb 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 sk_buff *skb);
#else



static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
					  enum rt2x00_dump_type type,
					  struct sk_buff *skb)
{
}

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#endif /* CONFIG_RT2X00_LIB_DEBUGFS */

/*
 * Utility functions.
 */
u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
			 struct ieee80211_vif *vif);

/*
 * 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_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);
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 */
int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		      struct ieee80211_sta *sta);
int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			 struct ieee80211_sta *sta);
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,
				u32 changes);
int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
		      struct ieee80211_vif *vif, 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);
#ifdef CONFIG_PM
int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
#endif /* CONFIG_PM */

#endif /* RT2X00_H */

Overall Contributors
PersonTokensPropCommitsCommitProp
ivo van doornivo van doorn216756.48%7640.86%


gertjan van wingerdegertjan van wingerde42911.18%2815.05%


gabor juhosgabor juhos40110.45%63.23%


helmut schaahelmut schaa3759.77%179.14%


bartlomiej zolnierkiewiczbartlomiej zolnierkiewicz1032.68%21.08%


johannes bergjohannes berg802.08%179.14%


pavel roskinpavel roskin441.15%10.54%


stanislaw w. gruszkastanislaw w. gruszka401.04%31.61%


joe perchesjoe perches310.81%10.54%


john lijohn li280.73%21.08%


johannes stezenbachjohannes stezenbach230.60%42.15%


stefan steuerwaldstefan steuerwald170.44%10.54%


stanislaw gruszkastanislaw gruszka170.44%63.23%


vishal thankivishal thanki80.21%10.54%


ra-jay hungra-jay hung70.18%21.08%


paul mcquadepaul mcquade70.18%10.54%


igor perminovigor perminov70.18%21.08%


adam bakeradam baker60.16%10.54%


daniel golledaniel golle50.13%10.54%


shiang tushiang tu50.13%10.54%


eliad pellereliad peller50.13%10.54%


emmanuel grumbachemmanuel grumbach50.13%10.54%


thomas huehnthomas huehn50.13%10.54%


woody hungwoody hung40.10%10.54%


lucas de marchilucas de marchi30.08%10.54%


alexey dobriyanalexey dobriyan30.08%10.54%


lars ericssonlars ericsson30.08%21.08%


mattias nisslermattias nissler30.08%10.54%


david woodhousedavid woodhouse20.05%10.54%


eli coopereli cooper20.05%10.54%


jeff kirsherjeff kirsher10.03%10.54%


luis correialuis correia10.03%10.54%


Total3837100.00%186100.00%

  
Directory: drivers/net/wireless/ralink/rt2x00



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