drivers/net/wireless/iwlwifi/iwl-shared.h

   1 /******************************************************************************
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   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
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  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
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  17  * General Public License for more details.
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  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
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  33  * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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  62  *****************************************************************************/
  63 #ifndef __iwl_shared_h__
  64 #define __iwl_shared_h__
  65
  66 #include <linux/types.h>
  67 #include <linux/spinlock.h>
  68 #include <linux/mutex.h>
  69 #include <linux/gfp.h>
  70 #include <linux/mm.h> /* for page_address */
  71 #include <net/mac80211.h>
  72
  73 #include "iwl-commands.h"
  74
  75 /**
  76  * DOC: shared area - role and goal
  77  *
  78  * The shared area contains all the data exported by the upper layer to the
  79  * other layers. Since the bus and transport layer shouldn't dereference
  80  * iwl_priv, all the data needed by the upper layer and the transport / bus
  81  * layer must be here.
  82  * The shared area also holds pointer to all the other layers. This allows a
  83  * layer to call a function from another layer.
  84  *
  85  * NOTE: All the layers hold a pointer to the shared area which must be shrd.
  86  *      A few macros assume that (_m)->shrd points to the shared area no matter
  87  *      what _m is.
  88  *
  89  * gets notifications about enumeration, suspend, resume.
  90  * For the moment, the bus layer is not a linux kernel module as itself, and
  91  * the module_init function of the driver must call the bus specific
  92  * registration functions. These functions are listed at the end of this file.
  93  * For the moment, there is only one implementation of this interface: PCI-e.
  94  * This implementation is iwl-pci.c
  95  */
  96
  97 struct iwl_cfg;
  98 struct iwl_bus;
  99 struct iwl_priv;
 100 struct iwl_sensitivity_ranges;
 101 struct iwl_trans_ops;
 102
 103 #define DRV_NAME        "iwlagn"
 104 #define IWLWIFI_VERSION "in-tree:"
 105 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
 106 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
 107
 108 extern struct iwl_mod_params iwlagn_mod_params;
 109
 110 /**
 111  * struct iwl_mod_params
 112  *
 113  * Holds the module parameters
 114  *
 115  * @sw_crypto: using hardware encryption, default = 0
 116  * @num_of_queues: number of tx queue, HW dependent
 117  * @disable_11n: 11n capabilities enabled, default = 0
 118  * @amsdu_size_8K: enable 8K amsdu size, default = 1
 119  * @antenna: both antennas (use diversity), default = 0
 120  * @restart_fw: restart firmware, default = 1
 121  * @plcp_check: enable plcp health check, default = true
 122  * @ack_check: disable ack health check, default = false
 123  * @wd_disable: enable stuck queue check, default = false
 124  * @bt_coex_active: enable bt coex, default = true
 125  * @led_mode: system default, default = 0
 126  * @no_sleep_autoadjust: disable autoadjust, default = true
 127  * @power_save: disable power save, default = false
 128  * @power_level: power level, default = 1
 129  * @debug_level: levels are IWL_DL_*
 130  * @ant_coupling: antenna coupling in dB, default = 0
 131  * @bt_ch_announce: BT channel inhibition, default = enable
 132  * @wanted_ucode_alternative: ucode alternative to use, default = 1
 133  * @auto_agg: enable agg. without check, default = true
 134  */
 135 struct iwl_mod_params {
 136         int sw_crypto;
 137         int num_of_queues;
 138         int disable_11n;
 139         int amsdu_size_8K;
 140         int antenna;
 141         int restart_fw;
 142         bool plcp_check;
 143         bool ack_check;
 144         bool wd_disable;
 145         bool bt_coex_active;
 146         int led_mode;
 147         bool no_sleep_autoadjust;
 148         bool power_save;
 149         int power_level;
 150         u32 debug_level;
 151         int ant_coupling;
 152         bool bt_ch_announce;
 153         int wanted_ucode_alternative;
 154         bool auto_agg;
 155 };
 156
 157 /**
 158  * struct iwl_hw_params
 159  *
 160  * Holds the module parameters
 161  *
 162  * @max_txq_num: Max # Tx queues supported
 163  * @num_ampdu_queues: num of ampdu queues
 164  * @tx_chains_num: Number of TX chains
 165  * @rx_chains_num: Number of RX chains
 166  * @valid_tx_ant: usable antennas for TX
 167  * @valid_rx_ant: usable antennas for RX
 168  * @max_stations: the maximal number of stations
 169  * @ht40_channel: is 40MHz width possible: BIT(IEEE80211_BAND_XXX)
 170  * @sku: sku read from EEPROM
 171  * @rx_page_order: Rx buffer page order
 172  * @max_inst_size: for ucode use
 173  * @max_data_size: for ucode use
 174  * @ct_kill_threshold: temperature threshold - in hw dependent unit
 175  * @ct_kill_exit_threshold: when to reeable the device - in hw dependent unit
 176  *      relevant for 1000, 6000 and up
 177  * @wd_timeout: TX queues watchdog timeout
 178  * @calib_init_cfg: setup initial calibrations for the hw
 179  * @calib_rt_cfg: setup runtime calibrations for the hw
 180  * @struct iwl_sensitivity_ranges: range of sensitivity values
 181  */
 182 struct iwl_hw_params {
 183         u8  max_txq_num;
 184         u8  num_ampdu_queues;
 185         u8  tx_chains_num;
 186         u8  rx_chains_num;
 187         u8  valid_tx_ant;
 188         u8  valid_rx_ant;
 189         u8  max_stations;
 190         u8  ht40_channel;
 191         bool shadow_reg_enable;
 192         u16 sku;
 193         u32 rx_page_order;
 194         u32 max_inst_size;
 195         u32 max_data_size;
 196         u32 ct_kill_threshold;
 197         u32 ct_kill_exit_threshold;
 198         unsigned int wd_timeout;
 199
 200         u32 calib_init_cfg;
 201         u32 calib_rt_cfg;
 202         const struct iwl_sensitivity_ranges *sens;
 203 };
 204
 205 /**
 206  * enum iwl_agg_state
 207  *
 208  * The state machine of the BA agreement establishment / tear down.
 209  * These states relate to a specific RA / TID.
 210  *
 211  * @IWL_AGG_OFF: aggregation is not used
 212  * @IWL_AGG_ON: aggregation session is up
 213  * @IWL_EMPTYING_HW_QUEUE_ADDBA: establishing a BA session - waiting for the
 214  *      HW queue to be empty from packets for this RA /TID.
 215  * @IWL_EMPTYING_HW_QUEUE_DELBA: tearing down a BA session - waiting for the
 216  *      HW queue to be empty from packets for this RA /TID.
 217  */
 218 enum iwl_agg_state {
 219         IWL_AGG_OFF = 0,
 220         IWL_AGG_ON,
 221         IWL_EMPTYING_HW_QUEUE_ADDBA,
 222         IWL_EMPTYING_HW_QUEUE_DELBA,
 223 };
 224
 225 /**
 226  * struct iwl_ht_agg - aggregation state machine
 227
 228  * This structs holds the states for the BA agreement establishment and tear
 229  * down. It also holds the state during the BA session itself. This struct is
 230  * duplicated for each RA / TID.
 231
 232  * @rate_n_flags: Rate at which Tx was attempted. Holds the data between the
 233  *      Tx response (REPLY_TX), and the block ack notification
 234  *      (REPLY_COMPRESSED_BA).
 235  * @state: state of the BA agreement establishment / tear down.
 236  * @txq_id: Tx queue used by the BA session - used by the transport layer.
 237  *      Needed by the upper layer for debugfs only.
 238  * @wait_for_ba: Expect block-ack before next Tx reply
 239  */
 240 struct iwl_ht_agg {
 241         u32 rate_n_flags;
 242         enum iwl_agg_state state;
 243         u16 txq_id;
 244         bool wait_for_ba;
 245 };
 246
 247 /**
 248  * struct iwl_tid_data - one for each RA / TID
 249
 250  * This structs holds the states for each RA / TID.
 251
 252  * @seq_number: the next WiFi sequence number to use
 253  * @tfds_in_queue: number of packets sent to the HW queues.
 254  *      Exported for debugfs only
 255  * @agg: aggregation state machine
 256  */
 257 struct iwl_tid_data {
 258         u16 seq_number;
 259         u16 tfds_in_queue;
 260         struct iwl_ht_agg agg;
 261 };
 262
 263 /**
 264  * struct iwl_shared - shared fields for all the layers of the driver
 265  *
 266  * @dbg_level_dev: dbg level set per device. Prevails on
 267  *      iwlagn_mod_params.debug_level if set (!= 0)
 268  * @ucode_owner: IWL_OWNERSHIP_*
 269  * @cmd_queue: command queue number
 270  * @status: STATUS_*
 271  * @valid_contexts: microcode/device supports multiple contexts
 272  * @bus: pointer to the bus layer data
 273  * @priv: pointer to the upper layer data
 274  * @hw_params: see struct iwl_hw_params
 275  * @workqueue: the workqueue used by all the layers of the driver
 276  * @lock: protect general shared data
 277  * @sta_lock: protects the station table.
 278  *      If lock and sta_lock are needed, lock must be acquired first.
 279  * @mutex:
 280  */
 281 struct iwl_shared {
 282 #ifdef CONFIG_IWLWIFI_DEBUG
 283         u32 dbg_level_dev;
 284 #endif /* CONFIG_IWLWIFI_DEBUG */
 285
 286 #define IWL_OWNERSHIP_DRIVER    0
 287 #define IWL_OWNERSHIP_TM        1
 288         u8 ucode_owner;
 289         u8 cmd_queue;
 290         unsigned long status;
 291         bool wowlan;
 292         u8 valid_contexts;
 293
 294         struct iwl_bus *bus;
 295         struct iwl_priv *priv;
 296         struct iwl_trans *trans;
 297         struct iwl_hw_params hw_params;
 298
 299         struct workqueue_struct *workqueue;
 300         spinlock_t lock;
 301         spinlock_t sta_lock;
 302         struct mutex mutex;
 303
 304         struct iwl_tid_data tid_data[IWLAGN_STATION_COUNT][IWL_MAX_TID_COUNT];
 305
 306         wait_queue_head_t wait_command_queue;
 307 };
 308
 309 /*Whatever _m is (iwl_trans, iwl_priv, iwl_bus, these macros will work */
 310 #define priv(_m)        ((_m)->shrd->priv)
 311 #define bus(_m)         ((_m)->shrd->bus)
 312 #define trans(_m)       ((_m)->shrd->trans)
 313 #define hw_params(_m)   ((_m)->shrd->hw_params)
 314
 315 #ifdef CONFIG_IWLWIFI_DEBUG
 316 /*
 317  * iwl_get_debug_level: Return active debug level for device
 318  *
 319  * Using sysfs it is possible to set per device debug level. This debug
 320  * level will be used if set, otherwise the global debug level which can be
 321  * set via module parameter is used.
 322  */
 323 static inline u32 iwl_get_debug_level(struct iwl_shared *shrd)
 324 {
 325         if (shrd->dbg_level_dev)
 326                 return shrd->dbg_level_dev;
 327         else
 328                 return iwlagn_mod_params.debug_level;
 329 }
 330 #else
 331 static inline u32 iwl_get_debug_level(struct iwl_shared *shrd)
 332 {
 333         return iwlagn_mod_params.debug_level;
 334 }
 335 #endif
 336
 337 static inline void iwl_free_pages(struct iwl_shared *shrd, unsigned long page)
 338 {
 339         free_pages(page, shrd->hw_params.rx_page_order);
 340 }
 341
 342 /**
 343  * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
 344  * @index -- current index
 345  * @n_bd -- total number of entries in queue (must be power of 2)
 346  */
 347 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 348 {
 349         return ++index & (n_bd - 1);
 350 }
 351
 352 /**
 353  * iwl_queue_dec_wrap - decrement queue index, wrap back to end
 354  * @index -- current index
 355  * @n_bd -- total number of entries in queue (must be power of 2)
 356  */
 357 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 358 {
 359         return --index & (n_bd - 1);
 360 }
 361
 362 struct iwl_rx_mem_buffer {
 363         dma_addr_t page_dma;
 364         struct page *page;
 365         struct list_head list;
 366 };
 367
 368 #define rxb_addr(r) page_address(r->page)
 369
 370 /*
 371  * mac80211 queues, ACs, hardware queues, FIFOs.
 372  *
 373  * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
 374  *
 375  * Mac80211 uses the following numbers, which we get as from it
 376  * by way of skb_get_queue_mapping(skb):
 377  *
 378  *      VO      0
 379  *      VI      1
 380  *      BE      2
 381  *      BK      3
 382  *
 383  *
 384  * Regular (not A-MPDU) frames are put into hardware queues corresponding
 385  * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
 386  * own queue per aggregation session (RA/TID combination), such queues are
 387  * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
 388  * order to map frames to the right queue, we also need an AC->hw queue
 389  * mapping. This is implemented here.
 390  *
 391  * Due to the way hw queues are set up (by the hw specific modules like
 392  * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity
 393  * mapping.
 394  */
 395
 396 static const u8 tid_to_ac[] = {
 397         IEEE80211_AC_BE,
 398         IEEE80211_AC_BK,
 399         IEEE80211_AC_BK,
 400         IEEE80211_AC_BE,
 401         IEEE80211_AC_VI,
 402         IEEE80211_AC_VI,
 403         IEEE80211_AC_VO,
 404         IEEE80211_AC_VO
 405 };
 406
 407 static inline int get_ac_from_tid(u16 tid)
 408 {
 409         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
 410                 return tid_to_ac[tid];
 411
 412         /* no support for TIDs 8-15 yet */
 413         return -EINVAL;
 414 }
 415
 416 enum iwl_rxon_context_id {
 417         IWL_RXON_CTX_BSS,
 418         IWL_RXON_CTX_PAN,
 419
 420         NUM_IWL_RXON_CTX
 421 };
 422
 423 int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
 424                 struct iwl_cfg *cfg);
 425 void __devexit iwl_remove(struct iwl_priv * priv);
 426
 427 void iwl_rx_dispatch(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
 428 int iwlagn_hw_valid_rtc_data_addr(u32 addr);
 429 void iwl_start_tx_ba_trans_ready(struct iwl_priv *priv,
 430                                  enum iwl_rxon_context_id ctx,
 431                                  u8 sta_id, u8 tid);
 432 void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
 433                                 enum iwl_rxon_context_id ctx,
 434                                 u8 sta_id, u8 tid);
 435 void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
 436 void iwl_nic_config(struct iwl_priv *priv);
 437 void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb);
 438 void iwl_apm_stop(struct iwl_priv *priv);
 439 int iwl_apm_init(struct iwl_priv *priv);
 440 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand);
 441 const char *get_cmd_string(u8 cmd);
 442 bool iwl_check_for_ct_kill(struct iwl_priv *priv);
 443
 444 void iwl_stop_sw_queue(struct iwl_priv *priv, u8 ac);
 445 void iwl_wake_sw_queue(struct iwl_priv *priv, u8 ac);
 446
 447 #ifdef CONFIG_IWLWIFI_DEBUGFS
 448 void iwl_reset_traffic_log(struct iwl_priv *priv);
 449 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 450
 451 #ifdef CONFIG_IWLWIFI_DEBUG
 452 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 453                              enum iwl_rxon_context_id ctxid);
 454 #else
 455 static inline void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 456                                            enum iwl_rxon_context_id ctxid)
 457 {
 458 }
 459 #endif
 460
 461 #define IWL_CMD(x) case x: return #x
 462 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
 463
 464 #define IWL_TRAFFIC_ENTRIES     (256)
 465 #define IWL_TRAFFIC_ENTRY_SIZE  (64)
 466
 467 /*****************************************************
 468 * DRIVER STATUS FUNCTIONS
 469 ******************************************************/
 470 #define STATUS_HCMD_ACTIVE      0       /* host command in progress */
 471 /* 1 is unused (used to be STATUS_HCMD_SYNC_ACTIVE) */
 472 #define STATUS_INT_ENABLED      2
 473 #define STATUS_RF_KILL_HW       3
 474 #define STATUS_CT_KILL          4
 475 #define STATUS_INIT             5
 476 #define STATUS_ALIVE            6
 477 #define STATUS_READY            7
 478 #define STATUS_TEMPERATURE      8
 479 #define STATUS_GEO_CONFIGURED   9
 480 #define STATUS_EXIT_PENDING     10
 481 #define STATUS_STATISTICS       12
 482 #define STATUS_SCANNING         13
 483 #define STATUS_SCAN_ABORTING    14
 484 #define STATUS_SCAN_HW          15
 485 #define STATUS_POWER_PMI        16
 486 #define STATUS_FW_ERROR         17
 487 #define STATUS_DEVICE_ENABLED   18
 488 #define STATUS_CHANNEL_SWITCH_PENDING 19
 489
 490 static inline int iwl_is_ready(struct iwl_shared *shrd)
 491 {
 492         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 493          * set but EXIT_PENDING is not */
 494         return test_bit(STATUS_READY, &shrd->status) &&
 495                test_bit(STATUS_GEO_CONFIGURED, &shrd->status) &&
 496                !test_bit(STATUS_EXIT_PENDING, &shrd->status);
 497 }
 498
 499 static inline int iwl_is_alive(struct iwl_shared *shrd)
 500 {
 501         return test_bit(STATUS_ALIVE, &shrd->status);
 502 }
 503
 504 static inline int iwl_is_init(struct iwl_shared *shrd)
 505 {
 506         return test_bit(STATUS_INIT, &shrd->status);
 507 }
 508
 509 static inline int iwl_is_rfkill_hw(struct iwl_shared *shrd)
 510 {
 511         return test_bit(STATUS_RF_KILL_HW, &shrd->status);
 512 }
 513
 514 static inline int iwl_is_rfkill(struct iwl_shared *shrd)
 515 {
 516         return iwl_is_rfkill_hw(shrd);
 517 }
 518
 519 static inline int iwl_is_ctkill(struct iwl_shared *shrd)
 520 {
 521         return test_bit(STATUS_CT_KILL, &shrd->status);
 522 }
 523
 524 static inline int iwl_is_ready_rf(struct iwl_shared *shrd)
 525 {
 526         if (iwl_is_rfkill(shrd))
 527                 return 0;
 528
 529         return iwl_is_ready(shrd);
 530 }
 531
 532 #endif /* #__iwl_shared_h__ */