drivers/net/wireless/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, write to the
  18         Free Software Foundation, Inc.,
  19         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 /*
  23         Module: rt2x00lib
  24         Abstract: Data structures and definitions for the rt2x00lib module.
  25  */
  26
  27 #ifndef RT2X00LIB_H
  28 #define RT2X00LIB_H
  29
  30 /*
  31  * Interval defines
  32  */
  33 #define WATCHDOG_INTERVAL       round_jiffies_relative(HZ)
  34 #define LINK_TUNE_INTERVAL      round_jiffies_relative(HZ)
  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);
 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_align_payload - Align 802.11 payload to 4-byte boundary
 123  * @skb: The skb to align
 124  * @header_length: Length of 802.11 header
 125  *
 126  * Align the 802.11 payload to a 4-byte boundary, this could
 127  * mean the header is not aligned properly though.
 128  */
 129 void rt2x00queue_align_payload(struct sk_buff *skb, unsigned int header_length);
 130
 131 /**
 132  * rt2x00queue_insert_l2pad - Align 802.11 header & payload to 4-byte boundary
 133  * @skb: The skb to align
 134  * @header_length: Length of 802.11 header
 135  *
 136  * Apply L2 padding to align both header and payload to 4-byte boundary
 137  */
 138 void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length);
 139
 140 /**
 141  * rt2x00queue_insert_l2pad - Remove L2 padding from 802.11 frame
 142  * @skb: The skb to align
 143  * @header_length: Length of 802.11 header
 144  *
 145  * Remove L2 padding used to align both header and payload to 4-byte boundary,
 146  * by removing the L2 padding the header will no longer be 4-byte aligned.
 147  */
 148 void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length);
 149
 150 /**
 151  * rt2x00queue_write_tx_frame - Write TX frame to hardware
 152  * @queue: Queue over which the frame should be send
 153  * @skb: The skb to send
 154  * @local: frame is not from mac80211
 155  */
 156 int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
 157                                bool local);
 158
 159 /**
 160  * rt2x00queue_update_beacon - Send new beacon from mac80211 to hardware
 161  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 162  * @vif: Interface for which the beacon should be updated.
 163  * @enable_beacon: Enable beaconing
 164  */
 165 int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
 166                               struct ieee80211_vif *vif,
 167                               const bool enable_beacon);
 168
 169 /**
 170  * rt2x00queue_index_inc - Index incrementation function
 171  * @queue: Queue (&struct data_queue) to perform the action on.
 172  * @index: Index type (&enum queue_index) to perform the action on.
 173  *
 174  * This function will increase the requested index on the queue,
 175  * it will grab the appropriate locks and handle queue overflow events by
 176  * resetting the index to the start of the queue.
 177  */
 178 void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index);
 179
 180 /**
 181  * rt2x00queue_init_queues - Initialize all data queues
 182  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 183  *
 184  * This function will loop through all available queues to clear all
 185  * index numbers and set the queue entry to the correct initialization
 186  * state.
 187  */
 188 void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev);
 189
 190 int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev);
 191 void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev);
 192 int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev);
 193 void rt2x00queue_free(struct rt2x00_dev *rt2x00dev);
 194
 195 /**
 196  * rt2x00link_update_stats - Update link statistics from RX frame
 197  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 198  * @skb: Received frame
 199  * @rxdesc: Received frame descriptor
 200  *
 201  * Update link statistics based on the information from the
 202  * received frame descriptor.
 203  */
 204 void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev,
 205                              struct sk_buff *skb,
 206                              struct rxdone_entry_desc *rxdesc);
 207
 208 /**
 209  * rt2x00link_start_tuner - Start periodic link tuner work
 210  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 211  *
 212  * This start the link tuner periodic work, this work will
 213  * be executed periodically until &rt2x00link_stop_tuner has
 214  * been called.
 215  */
 216 void rt2x00link_start_tuner(struct rt2x00_dev *rt2x00dev);
 217
 218 /**
 219  * rt2x00link_stop_tuner - Stop periodic link tuner work
 220  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 221  *
 222  * After this function completed the link tuner will not
 223  * be running until &rt2x00link_start_tuner is called.
 224  */
 225 void rt2x00link_stop_tuner(struct rt2x00_dev *rt2x00dev);
 226
 227 /**
 228  * rt2x00link_reset_tuner - Reset periodic link tuner work
 229  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 230  * @antenna: Should the antenna tuning also be reset
 231  *
 232  * The VGC limit configured in the hardware will be reset to 0
 233  * which forces the driver to rediscover the correct value for
 234  * the current association. This is needed when configuration
 235  * options have changed which could drastically change the
 236  * SNR level or link quality (i.e. changing the antenna setting).
 237  *
 238  * Resetting the link tuner will also cause the periodic work counter
 239  * to be reset. Any driver which has a fixed limit on the number
 240  * of rounds the link tuner is supposed to work will accept the
 241  * tuner actions again if this limit was previously reached.
 242  *
 243  * If @antenna is set to true a the software antenna diversity
 244  * tuning will also be reset.
 245  */
 246 void rt2x00link_reset_tuner(struct rt2x00_dev *rt2x00dev, bool antenna);
 247
 248 /**
 249  * rt2x00link_start_watchdog - Start periodic watchdog monitoring
 250  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 251  *
 252  * This start the watchdog periodic work, this work will
 253  *be executed periodically until &rt2x00link_stop_watchdog has
 254  * been called.
 255  */
 256 void rt2x00link_start_watchdog(struct rt2x00_dev *rt2x00dev);
 257
 258 /**
 259  * rt2x00link_stop_watchdog - Stop periodic watchdog monitoring
 260  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 261  *
 262  * After this function completed the watchdog monitoring will not
 263  * be running until &rt2x00link_start_watchdog is called.
 264  */
 265 void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev);
 266
 267 /**
 268  * rt2x00link_register - Initialize link tuning & watchdog functionality
 269  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 270  *
 271  * Initialize work structure and all link tuning and watchdog related
 272  * parameters. This will not start the periodic work itself.
 273  */
 274 void rt2x00link_register(struct rt2x00_dev *rt2x00dev);
 275
 276 /*
 277  * Firmware handlers.
 278  */
 279 #ifdef CONFIG_RT2X00_LIB_FIRMWARE
 280 int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev);
 281 void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev);
 282 #else
 283 static inline int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
 284 {
 285         return 0;
 286 }
 287 static inline void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
 288 {
 289 }
 290 #endif /* CONFIG_RT2X00_LIB_FIRMWARE */
 291
 292 /*
 293  * Debugfs handlers.
 294  */
 295 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 296 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev);
 297 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev);
 298 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 299                                struct rxdone_entry_desc *rxdesc);
 300 #else
 301 static inline void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 302 {
 303 }
 304
 305 static inline void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 306 {
 307 }
 308
 309 static inline void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 310                                              struct rxdone_entry_desc *rxdesc)
 311 {
 312 }
 313 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 314
 315 /*
 316  * Crypto handlers.
 317  */
 318 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 319 enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key);
 320 void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
 321                                        struct txentry_desc *txdesc);
 322 unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 323                                       struct sk_buff *skb);
 324 void rt2x00crypto_tx_copy_iv(struct sk_buff *skb,
 325                              struct txentry_desc *txdesc);
 326 void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
 327                                struct txentry_desc *txdesc);
 328 void rt2x00crypto_tx_insert_iv(struct sk_buff *skb, unsigned int header_length);
 329 void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 330                                unsigned int header_length,
 331                                struct rxdone_entry_desc *rxdesc);
 332 #else
 333 static inline enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
 334 {
 335         return CIPHER_NONE;
 336 }
 337
 338 static inline void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
 339                                                      struct txentry_desc *txdesc)
 340 {
 341 }
 342
 343 static inline unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 344                                                     struct sk_buff *skb)
 345 {
 346         return 0;
 347 }
 348
 349 static inline void rt2x00crypto_tx_copy_iv(struct sk_buff *skb,
 350                                            struct txentry_desc *txdesc)
 351 {
 352 }
 353
 354 static inline void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
 355                                              struct txentry_desc *txdesc)
 356 {
 357 }
 358
 359 static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb,
 360                                              unsigned int header_length)
 361 {
 362 }
 363
 364 static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 365                                              unsigned int header_length,
 366                                              struct rxdone_entry_desc *rxdesc)
 367 {
 368 }
 369 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
 370
 371 /*
 372  * HT handlers.
 373  */
 374 #ifdef CONFIG_RT2X00_LIB_HT
 375 void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
 376                                    struct txentry_desc *txdesc,
 377                                    const struct rt2x00_rate *hwrate);
 378
 379 u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
 380                             struct ieee80211_conf *conf);
 381 #else
 382 static inline void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
 383                                                  struct txentry_desc *txdesc,
 384                                                  const struct rt2x00_rate *hwrate)
 385 {
 386 }
 387
 388 static inline u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
 389                                           struct ieee80211_conf *conf)
 390 {
 391         return conf->channel->hw_value;
 392 }
 393 #endif /* CONFIG_RT2X00_LIB_HT */
 394
 395 /*
 396  * RFkill handlers.
 397  */
 398 static inline void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
 399 {
 400         if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 401                 wiphy_rfkill_start_polling(rt2x00dev->hw->wiphy);
 402 }
 403
 404 static inline void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
 405 {
 406         if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 407                 wiphy_rfkill_stop_polling(rt2x00dev->hw->wiphy);
 408 }
 409
 410 /*
 411  * LED handlers
 412  */
 413 #ifdef CONFIG_RT2X00_LIB_LEDS
 414 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi);
 415 void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled);
 416 void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled);
 417 void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled);
 418 void rt2x00leds_register(struct rt2x00_dev *rt2x00dev);
 419 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev);
 420 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev);
 421 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev);
 422 #else
 423 static inline void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev,
 424                                           int rssi)
 425 {
 426 }
 427
 428 static inline void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev,
 429                                           bool enabled)
 430 {
 431 }
 432
 433 static inline void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev,
 434                                         bool enabled)
 435 {
 436 }
 437
 438 static inline void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev,
 439                                         bool enabled)
 440 {
 441 }
 442
 443 static inline void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 444 {
 445 }
 446
 447 static inline void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
 448 {
 449 }
 450
 451 static inline void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
 452 {
 453 }
 454
 455 static inline void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
 456 {
 457 }
 458 #endif /* CONFIG_RT2X00_LIB_LEDS */
 459
 460 #endif /* RT2X00LIB_H */