drivers/net/wireless/ralink/rt2x00/rt2x00lib.h

   1 /*
   2         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   3         Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
   4         <http://rt2x00.serialmonkey.com>
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*
  21         Module: rt2x00lib
  22         Abstract: Data structures and definitions for the rt2x00lib module.
  23  */
  24
  25 #ifndef RT2X00LIB_H
  26 #define RT2X00LIB_H
  27
  28 /*
  29  * Interval defines
  30  */
  31 #define WATCHDOG_INTERVAL       round_jiffies_relative(HZ)
  32 #define LINK_TUNE_INTERVAL      round_jiffies_relative(HZ)
  33 #define AGC_INTERVAL            round_jiffies_relative(4 * HZ)
  34 #define VCO_INTERVAL            round_jiffies_relative(10 * HZ) /* 10 sec */
  35
  36 /*
  37  * rt2x00_rate: Per rate device information
  38  */
  39 struct rt2x00_rate {
  40         unsigned short flags;
  41 #define DEV_RATE_CCK                    0x0001
  42 #define DEV_RATE_OFDM                   0x0002
  43 #define DEV_RATE_SHORT_PREAMBLE         0x0004
  44
  45         unsigned short bitrate; /* In 100kbit/s */
  46         unsigned short ratemask;
  47
  48         unsigned short plcp;
  49         unsigned short mcs;
  50 };
  51
  52 extern const struct rt2x00_rate rt2x00_supported_rates[12];
  53
  54 static inline const struct rt2x00_rate *rt2x00_get_rate(const u16 hw_value)
  55 {
  56         return &rt2x00_supported_rates[hw_value & 0xff];
  57 }
  58
  59 #define RATE_MCS(__mode, __mcs) \
  60         ((((__mode) & 0x00ff) << 8) | ((__mcs) & 0x00ff))
  61
  62 static inline int rt2x00_get_rate_mcs(const u16 mcs_value)
  63 {
  64         return (mcs_value & 0x00ff);
  65 }
  66
  67 /*
  68  * Radio control handlers.
  69  */
  70 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev);
  71 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev);
  72
  73 /*
  74  * Initialization handlers.
  75  */
  76 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev);
  77 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev);
  78
  79 /*
  80  * Configuration handlers.
  81  */
  82 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
  83                            struct rt2x00_intf *intf,
  84                            enum nl80211_iftype type,
  85                            const u8 *mac, const u8 *bssid);
  86 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
  87                           struct rt2x00_intf *intf,
  88                           struct ieee80211_bss_conf *conf,
  89                           u32 changed);
  90 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
  91                               struct antenna_setup ant);
  92 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
  93                       struct ieee80211_conf *conf,
  94                       const unsigned int changed_flags);
  95
  96 /**
  97  * DOC: Queue handlers
  98  */
  99
 100 /**
 101  * rt2x00queue_alloc_rxskb - allocate a skb for RX purposes.
 102  * @entry: The entry for which the skb will be applicable.
 103  */
 104 struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry, gfp_t gfp);
 105
 106 /**
 107  * rt2x00queue_free_skb - free a skb
 108  * @entry: The entry for which the skb will be applicable.
 109  */
 110 void rt2x00queue_free_skb(struct queue_entry *entry);
 111
 112 /**
 113  * rt2x00queue_align_frame - Align 802.11 frame to 4-byte boundary
 114  * @skb: The skb to align
 115  *
 116  * Align the start of the 802.11 frame to a 4-byte boundary, this could
 117  * mean the payload is not aligned properly though.
 118  */
 119 void rt2x00queue_align_frame(struct sk_buff *skb);
 120
 121 /**
 122  * rt2x00queue_insert_l2pad - Align 802.11 header & payload to 4-byte boundary
 123  * @skb: The skb to align
 124  * @header_length: Length of 802.11 header
 125  *
 126  * Apply L2 padding to align both header and payload to 4-byte boundary
 127  */
 128 void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length);
 129
 130 /**
 131  * rt2x00queue_insert_l2pad - Remove L2 padding from 802.11 frame
 132  * @skb: The skb to align
 133  * @header_length: Length of 802.11 header
 134  *
 135  * Remove L2 padding used to align both header and payload to 4-byte boundary,
 136  * by removing the L2 padding the header will no longer be 4-byte aligned.
 137  */
 138 void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length);
 139
 140 /**
 141  * rt2x00queue_write_tx_frame - Write TX frame to hardware
 142  * @queue: Queue over which the frame should be send
 143  * @skb: The skb to send
 144  * @local: frame is not from mac80211
 145  */
 146 int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
 147                                struct ieee80211_sta *sta, bool local);
 148
 149 /**
 150  * rt2x00queue_update_beacon - Send new beacon from mac80211
 151  *      to hardware. Handles locking by itself (mutex).
 152  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 153  * @vif: Interface for which the beacon should be updated.
 154  */
 155 int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
 156                               struct ieee80211_vif *vif);
 157
 158 /**
 159  * rt2x00queue_update_beacon_locked - Send new beacon from mac80211
 160  *      to hardware. Caller needs to ensure locking.
 161  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 162  * @vif: Interface for which the beacon should be updated.
 163  */
 164 int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev,
 165                                      struct ieee80211_vif *vif);
 166
 167 /**
 168  * rt2x00queue_clear_beacon - Clear beacon in hardware
 169  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 170  * @vif: Interface for which the beacon should be updated.
 171  */
 172 int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev,
 173                              struct ieee80211_vif *vif);
 174
 175 /**
 176  * rt2x00queue_index_inc - Index incrementation function
 177  * @entry: Queue entry (&struct queue_entry) to perform the action on.
 178  * @index: Index type (&enum queue_index) to perform the action on.
 179  *
 180  * This function will increase the requested index on the entry's queue,
 181  * it will grab the appropriate locks and handle queue overflow events by
 182  * resetting the index to the start of the queue.
 183  */
 184 void rt2x00queue_index_inc(struct queue_entry *entry, enum queue_index index);
 185
 186 /**
 187  * rt2x00queue_init_queues - Initialize all data queues
 188  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 189  *
 190  * This function will loop through all available queues to clear all
 191  * index numbers and set the queue entry to the correct initialization
 192  * state.
 193  */
 194 void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev);
 195
 196 int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev);
 197 void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev);
 198 int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev);
 199 void rt2x00queue_free(struct rt2x00_dev *rt2x00dev);
 200
 201 /**
 202  * rt2x00link_update_stats - Update link statistics from RX frame
 203  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 204  * @skb: Received frame
 205  * @rxdesc: Received frame descriptor
 206  *
 207  * Update link statistics based on the information from the
 208  * received frame descriptor.
 209  */
 210 void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev,
 211                              struct sk_buff *skb,
 212                              struct rxdone_entry_desc *rxdesc);
 213
 214 /**
 215  * rt2x00link_start_tuner - Start periodic link tuner work
 216  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 217  *
 218  * This start the link tuner periodic work, this work will
 219  * be executed periodically until &rt2x00link_stop_tuner has
 220  * been called.
 221  */
 222 void rt2x00link_start_tuner(struct rt2x00_dev *rt2x00dev);
 223
 224 /**
 225  * rt2x00link_stop_tuner - Stop periodic link tuner work
 226  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 227  *
 228  * After this function completed the link tuner will not
 229  * be running until &rt2x00link_start_tuner is called.
 230  */
 231 void rt2x00link_stop_tuner(struct rt2x00_dev *rt2x00dev);
 232
 233 /**
 234  * rt2x00link_reset_tuner - Reset periodic link tuner work
 235  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 236  * @antenna: Should the antenna tuning also be reset
 237  *
 238  * The VGC limit configured in the hardware will be reset to 0
 239  * which forces the driver to rediscover the correct value for
 240  * the current association. This is needed when configuration
 241  * options have changed which could drastically change the
 242  * SNR level or link quality (i.e. changing the antenna setting).
 243  *
 244  * Resetting the link tuner will also cause the periodic work counter
 245  * to be reset. Any driver which has a fixed limit on the number
 246  * of rounds the link tuner is supposed to work will accept the
 247  * tuner actions again if this limit was previously reached.
 248  *
 249  * If @antenna is set to true a the software antenna diversity
 250  * tuning will also be reset.
 251  */
 252 void rt2x00link_reset_tuner(struct rt2x00_dev *rt2x00dev, bool antenna);
 253
 254 /**
 255  * rt2x00link_start_watchdog - Start periodic watchdog monitoring
 256  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 257  *
 258  * This start the watchdog periodic work, this work will
 259  *be executed periodically until &rt2x00link_stop_watchdog has
 260  * been called.
 261  */
 262 void rt2x00link_start_watchdog(struct rt2x00_dev *rt2x00dev);
 263
 264 /**
 265  * rt2x00link_stop_watchdog - Stop periodic watchdog monitoring
 266  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 267  *
 268  * After this function completed the watchdog monitoring will not
 269  * be running until &rt2x00link_start_watchdog is called.
 270  */
 271 void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev);
 272
 273 /**
 274  * rt2x00link_start_agc - Start periodic gain calibration
 275  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 276  */
 277 void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev);
 278
 279 /**
 280  * rt2x00link_start_vcocal - Start periodic VCO calibration
 281  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 282  */
 283 void rt2x00link_start_vcocal(struct rt2x00_dev *rt2x00dev);
 284
 285 /**
 286  * rt2x00link_stop_agc - Stop periodic gain calibration
 287  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 288  */
 289 void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev);
 290
 291 /**
 292  * rt2x00link_stop_vcocal - Stop periodic VCO calibration
 293  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 294  */
 295 void rt2x00link_stop_vcocal(struct rt2x00_dev *rt2x00dev);
 296
 297 /**
 298  * rt2x00link_register - Initialize link tuning & watchdog functionality
 299  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 300  *
 301  * Initialize work structure and all link tuning and watchdog related
 302  * parameters. This will not start the periodic work itself.
 303  */
 304 void rt2x00link_register(struct rt2x00_dev *rt2x00dev);
 305
 306 /*
 307  * Firmware handlers.
 308  */
 309 #ifdef CONFIG_RT2X00_LIB_FIRMWARE
 310 int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev);
 311 void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev);
 312 #else
 313 static inline int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
 314 {
 315         return 0;
 316 }
 317 static inline void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
 318 {
 319 }
 320 #endif /* CONFIG_RT2X00_LIB_FIRMWARE */
 321
 322 /*
 323  * Debugfs handlers.
 324  */
 325 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 326 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev);
 327 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev);
 328 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 329                                struct rxdone_entry_desc *rxdesc);
 330 #else
 331 static inline void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 332 {
 333 }
 334
 335 static inline void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 336 {
 337 }
 338
 339 static inline void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 340                                              struct rxdone_entry_desc *rxdesc)
 341 {
 342 }
 343 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 344
 345 /*
 346  * Crypto handlers.
 347  */
 348 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 349 enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key);
 350 void rt2x00crypto_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
 351                                        struct sk_buff *skb,
 352                                        struct txentry_desc *txdesc);
 353 unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 354                                       struct sk_buff *skb);
 355 void rt2x00crypto_tx_copy_iv(struct sk_buff *skb,
 356                              struct txentry_desc *txdesc);
 357 void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
 358                                struct txentry_desc *txdesc);
 359 void rt2x00crypto_tx_insert_iv(struct sk_buff *skb, unsigned int header_length);
 360 void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 361                                unsigned int header_length,
 362                                struct rxdone_entry_desc *rxdesc);
 363 #else
 364 static inline enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
 365 {
 366         return CIPHER_NONE;
 367 }
 368
 369 static inline void rt2x00crypto_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
 370                                                      struct sk_buff *skb,
 371                                                      struct txentry_desc *txdesc)
 372 {
 373 }
 374
 375 static inline unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 376                                                     struct sk_buff *skb)
 377 {
 378         return 0;
 379 }
 380
 381 static inline void rt2x00crypto_tx_copy_iv(struct sk_buff *skb,
 382                                            struct txentry_desc *txdesc)
 383 {
 384 }
 385
 386 static inline void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
 387                                              struct txentry_desc *txdesc)
 388 {
 389 }
 390
 391 static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb,
 392                                              unsigned int header_length)
 393 {
 394 }
 395
 396 static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 397                                              unsigned int header_length,
 398                                              struct rxdone_entry_desc *rxdesc)
 399 {
 400 }
 401 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
 402
 403 /*
 404  * RFkill handlers.
 405  */
 406 static inline void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
 407 {
 408         if (test_bit(CAPABILITY_HW_BUTTON, &rt2x00dev->cap_flags))
 409                 wiphy_rfkill_start_polling(rt2x00dev->hw->wiphy);
 410 }
 411
 412 static inline void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
 413 {
 414         if (test_bit(CAPABILITY_HW_BUTTON, &rt2x00dev->cap_flags))
 415                 wiphy_rfkill_stop_polling(rt2x00dev->hw->wiphy);
 416 }
 417
 418 /*
 419  * LED handlers
 420  */
 421 #ifdef CONFIG_RT2X00_LIB_LEDS
 422 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi);
 423 void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled);
 424 void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled);
 425 void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled);
 426 void rt2x00leds_register(struct rt2x00_dev *rt2x00dev);
 427 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev);
 428 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev);
 429 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev);
 430 #else
 431 static inline void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev,
 432                                           int rssi)
 433 {
 434 }
 435
 436 static inline void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev,
 437                                           bool enabled)
 438 {
 439 }
 440
 441 static inline void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev,
 442                                         bool enabled)
 443 {
 444 }
 445
 446 static inline void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev,
 447                                         bool enabled)
 448 {
 449 }
 450
 451 static inline void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 452 {
 453 }
 454
 455 static inline void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
 456 {
 457 }
 458
 459 static inline void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
 460 {
 461 }
 462
 463 static inline void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
 464 {
 465 }
 466 #endif /* CONFIG_RT2X00_LIB_LEDS */
 467
 468 #endif /* RT2X00LIB_H */