drivers/net/wireless/rt2x00/rt2x00lib.h

   1 /*
   2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: Data structures and definitions for the rt2x00lib module.
  24  */
  25
  26 #ifndef RT2X00LIB_H
  27 #define RT2X00LIB_H
  28
  29 #include "rt2x00dump.h"
  30
  31 /*
  32  * Interval defines
  33  * Both the link tuner as the rfkill will be called once per second.
  34  */
  35 #define LINK_TUNE_INTERVAL      ( round_jiffies_relative(HZ) )
  36 #define RFKILL_POLL_INTERVAL    ( 1000 )
  37
  38 /*
  39  * rt2x00_rate: Per rate device information
  40  */
  41 struct rt2x00_rate {
  42         unsigned short flags;
  43 #define DEV_RATE_CCK                    0x0001
  44 #define DEV_RATE_OFDM                   0x0002
  45 #define DEV_RATE_SHORT_PREAMBLE         0x0004
  46
  47         unsigned short bitrate; /* In 100kbit/s */
  48         unsigned short ratemask;
  49
  50         unsigned short plcp;
  51 };
  52
  53 extern const struct rt2x00_rate rt2x00_supported_rates[12];
  54
  55 static inline const struct rt2x00_rate *rt2x00_get_rate(const u16 hw_value)
  56 {
  57         return &rt2x00_supported_rates[hw_value & 0xff];
  58 }
  59
  60 /*
  61  * Radio control handlers.
  62  */
  63 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev);
  64 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev);
  65 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state);
  66
  67 /*
  68  * Initialization handlers.
  69  */
  70 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev);
  71 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev);
  72
  73 /*
  74  * Configuration handlers.
  75  */
  76 void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
  77                            struct rt2x00_intf *intf,
  78                            enum nl80211_iftype type,
  79                            const u8 *mac, const u8 *bssid);
  80 void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
  81                           struct rt2x00_intf *intf,
  82                           struct ieee80211_bss_conf *conf);
  83 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
  84                               struct antenna_setup *ant);
  85 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
  86                       struct ieee80211_conf *conf,
  87                       const unsigned int changed_flags);
  88
  89 /**
  90  * DOC: Queue handlers
  91  */
  92
  93 /**
  94  * rt2x00queue_alloc_rxskb - allocate a skb for RX purposes.
  95  * @rt2x00dev: Pointer to &struct rt2x00_dev.
  96  * @queue: The queue for which the skb will be applicable.
  97  */
  98 struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev,
  99                                         struct queue_entry *entry);
 100
 101 /**
 102  * rt2x00queue_unmap_skb - Unmap a skb from DMA.
 103  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 104  * @skb: The skb to unmap.
 105  */
 106 void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
 107
 108 /**
 109  * rt2x00queue_free_skb - free a skb
 110  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 111  * @skb: The skb to free.
 112  */
 113 void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
 114
 115 /**
 116  * rt2x00queue_write_tx_frame - Write TX frame to hardware
 117  * @queue: Queue over which the frame should be send
 118  * @skb: The skb to send
 119  */
 120 int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb);
 121
 122 /**
 123  * rt2x00queue_update_beacon - Send new beacon from mac80211 to hardware
 124  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 125  * @vif: Interface for which the beacon should be updated.
 126  * @enable_beacon: Enable beaconing
 127  */
 128 int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
 129                               struct ieee80211_vif *vif,
 130                               const bool enable_beacon);
 131
 132 /**
 133  * rt2x00queue_index_inc - Index incrementation function
 134  * @queue: Queue (&struct data_queue) to perform the action on.
 135  * @index: Index type (&enum queue_index) to perform the action on.
 136  *
 137  * This function will increase the requested index on the queue,
 138  * it will grab the appropriate locks and handle queue overflow events by
 139  * resetting the index to the start of the queue.
 140  */
 141 void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index);
 142
 143 /**
 144  * rt2x00queue_stop_queues - Halt all data queues
 145  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 146  *
 147  * This function will loop through all available queues to stop
 148  * any pending outgoing frames.
 149  */
 150 void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
 151
 152 /**
 153  * rt2x00queue_init_queues - Initialize all data queues
 154  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 155  *
 156  * This function will loop through all available queues to clear all
 157  * index numbers and set the queue entry to the correct initialization
 158  * state.
 159  */
 160 void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev);
 161
 162 int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev);
 163 void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev);
 164 int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev);
 165 void rt2x00queue_free(struct rt2x00_dev *rt2x00dev);
 166
 167 /**
 168  * rt2x00link_update_stats - Update link statistics from RX frame
 169  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 170  * @skb: Received frame
 171  * @rxdesc: Received frame descriptor
 172  *
 173  * Update link statistics based on the information from the
 174  * received frame descriptor.
 175  */
 176 void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev,
 177                              struct sk_buff *skb,
 178                              struct rxdone_entry_desc *rxdesc);
 179
 180 /**
 181  * rt2x00link_calculate_signal - Calculate signal quality
 182  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 183  * @rssi: RX Frame RSSI
 184  *
 185  * Calculate the signal quality of a frame based on the rssi
 186  * measured during the receiving of the frame and the global
 187  * link quality statistics measured since the start of the
 188  * link tuning. The result is a value between 0 and 100 which
 189  * is an indication of the signal quality.
 190  */
 191 int rt2x00link_calculate_signal(struct rt2x00_dev *rt2x00dev, int rssi);
 192
 193 /**
 194  * rt2x00link_start_tuner - Start periodic link tuner work
 195  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 196  *
 197  * This start the link tuner periodic work, this work will
 198  * be executed periodically until &rt2x00link_stop_tuner has
 199  * been called.
 200  */
 201 void rt2x00link_start_tuner(struct rt2x00_dev *rt2x00dev);
 202
 203 /**
 204  * rt2x00link_stop_tuner - Stop periodic link tuner work
 205  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 206  *
 207  * After this function completed the link tuner will not
 208  * be running until &rt2x00link_start_tuner is called.
 209  */
 210 void rt2x00link_stop_tuner(struct rt2x00_dev *rt2x00dev);
 211
 212 /**
 213  * rt2x00link_reset_tuner - Reset periodic link tuner work
 214  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 215  * @antenna: Should the antenna tuning also be reset
 216  *
 217  * The VGC limit configured in the hardware will be reset to 0
 218  * which forces the driver to rediscover the correct value for
 219  * the current association. This is needed when configuration
 220  * options have changed which could drastically change the
 221  * SNR level or link quality (i.e. changing the antenna setting).
 222  *
 223  * Resetting the link tuner will also cause the periodic work counter
 224  * to be reset. Any driver which has a fixed limit on the number
 225  * of rounds the link tuner is supposed to work will accept the
 226  * tuner actions again if this limit was previously reached.
 227  *
 228  * If @antenna is set to true a the software antenna diversity
 229  * tuning will also be reset.
 230  */
 231 void rt2x00link_reset_tuner(struct rt2x00_dev *rt2x00dev, bool antenna);
 232
 233 /**
 234  * rt2x00link_register - Initialize link tuning functionality
 235  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 236  *
 237  * Initialize work structure and all link tuning related
 238  * paramters. This will not start the link tuning process itself.
 239  */
 240 void rt2x00link_register(struct rt2x00_dev *rt2x00dev);
 241
 242 /*
 243  * Firmware handlers.
 244  */
 245 #ifdef CONFIG_RT2X00_LIB_FIRMWARE
 246 int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev);
 247 void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev);
 248 #else
 249 static inline int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
 250 {
 251         return 0;
 252 }
 253 static inline void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
 254 {
 255 }
 256 #endif /* CONFIG_RT2X00_LIB_FIRMWARE */
 257
 258 /*
 259  * Debugfs handlers.
 260  */
 261 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 262 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev);
 263 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev);
 264 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 265                             enum rt2x00_dump_type type, struct sk_buff *skb);
 266 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 267                                struct rxdone_entry_desc *rxdesc);
 268 #else
 269 static inline void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 270 {
 271 }
 272
 273 static inline void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 274 {
 275 }
 276
 277 static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 278                                           enum rt2x00_dump_type type,
 279                                           struct sk_buff *skb)
 280 {
 281 }
 282
 283 static inline void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 284                                              struct rxdone_entry_desc *rxdesc)
 285 {
 286 }
 287 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 288
 289 /*
 290  * Crypto handlers.
 291  */
 292 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 293 enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key);
 294 void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
 295                                        struct txentry_desc *txdesc);
 296 unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 297                                       struct sk_buff *skb);
 298 void rt2x00crypto_tx_copy_iv(struct sk_buff *skb, unsigned int iv_len);
 299 void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, unsigned int iv_len);
 300 void rt2x00crypto_tx_insert_iv(struct sk_buff *skb);
 301 void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, unsigned int align,
 302                                unsigned int header_length,
 303                                struct rxdone_entry_desc *rxdesc);
 304 #else
 305 static inline enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
 306 {
 307         return CIPHER_NONE;
 308 }
 309
 310 static inline void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
 311                                                      struct txentry_desc *txdesc)
 312 {
 313 }
 314
 315 static inline unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 316                                                     struct sk_buff *skb)
 317 {
 318         return 0;
 319 }
 320
 321 static inline void rt2x00crypto_tx_copy_iv(struct sk_buff *skb,
 322                                            unsigned int iv_len)
 323 {
 324 }
 325
 326 static inline void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
 327                                              unsigned int iv_len)
 328 {
 329 }
 330
 331 static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb)
 332 {
 333 }
 334
 335 static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 336                                              unsigned int align,
 337                                              unsigned int header_length,
 338                                              struct rxdone_entry_desc *rxdesc)
 339 {
 340 }
 341 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
 342
 343 /*
 344  * RFkill handlers.
 345  */
 346 #ifdef CONFIG_RT2X00_LIB_RFKILL
 347 void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev);
 348 void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev);
 349 void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev);
 350 void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev);
 351 #else
 352 static inline void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
 353 {
 354 }
 355
 356 static inline void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
 357 {
 358 }
 359
 360 static inline void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
 361 {
 362 }
 363
 364 static inline void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
 365 {
 366 }
 367 #endif /* CONFIG_RT2X00_LIB_RFKILL */
 368
 369 /*
 370  * LED handlers
 371  */
 372 #ifdef CONFIG_RT2X00_LIB_LEDS
 373 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi);
 374 void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled);
 375 void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled);
 376 void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled);
 377 void rt2x00leds_register(struct rt2x00_dev *rt2x00dev);
 378 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev);
 379 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev);
 380 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev);
 381 #else
 382 static inline void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev,
 383                                           int rssi)
 384 {
 385 }
 386
 387 static inline void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev,
 388                                           bool enabled)
 389 {
 390 }
 391
 392 static inline void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev,
 393                                         bool enabled)
 394 {
 395 }
 396
 397 static inline void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev,
 398                                         bool enabled)
 399 {
 400 }
 401
 402 static inline void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 403 {
 404 }
 405
 406 static inline void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
 407 {
 408 }
 409
 410 static inline void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
 411 {
 412 }
 413
 414 static inline void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
 415 {
 416 }
 417 #endif /* CONFIG_RT2X00_LIB_LEDS */
 418
 419 #endif /* RT2X00LIB_H */