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

   1 /******************************************************************************
   2  *
   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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  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  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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  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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        "iwlwifi"
 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  * @ht40_channel: is 40MHz width possible: BIT(IEEE80211_BAND_XXX)
 169  * @sku: sku read from EEPROM
 170  * @rx_page_order: Rx buffer page order
 171  * @max_inst_size: for ucode use
 172  * @max_data_size: for ucode use
 173  * @ct_kill_threshold: temperature threshold - in hw dependent unit
 174  * @ct_kill_exit_threshold: when to reeable the device - in hw dependent unit
 175  *      relevant for 1000, 6000 and up
 176  * @wd_timeout: TX queues watchdog timeout
 177  * @calib_init_cfg: setup initial calibrations for the hw
 178  * @calib_rt_cfg: setup runtime calibrations for the hw
 179  * @struct iwl_sensitivity_ranges: range of sensitivity values
 180  */
 181 struct iwl_hw_params {
 182         u8  max_txq_num;
 183         u8  num_ampdu_queues;
 184         u8  tx_chains_num;
 185         u8  rx_chains_num;
 186         u8  valid_tx_ant;
 187         u8  valid_rx_ant;
 188         u8  ht40_channel;
 189         bool shadow_reg_enable;
 190         u16 sku;
 191         u32 rx_page_order;
 192         u32 max_inst_size;
 193         u32 max_data_size;
 194         u32 ct_kill_threshold;
 195         u32 ct_kill_exit_threshold;
 196         unsigned int wd_timeout;
 197
 198         u32 calib_init_cfg;
 199         u32 calib_rt_cfg;
 200         const struct iwl_sensitivity_ranges *sens;
 201 };
 202
 203 /**
 204  * enum iwl_agg_state
 205  *
 206  * The state machine of the BA agreement establishment / tear down.
 207  * These states relate to a specific RA / TID.
 208  *
 209  * @IWL_AGG_OFF: aggregation is not used
 210  * @IWL_AGG_ON: aggregation session is up
 211  * @IWL_EMPTYING_HW_QUEUE_ADDBA: establishing a BA session - waiting for the
 212  *      HW queue to be empty from packets for this RA /TID.
 213  * @IWL_EMPTYING_HW_QUEUE_DELBA: tearing down a BA session - waiting for the
 214  *      HW queue to be empty from packets for this RA /TID.
 215  */
 216 enum iwl_agg_state {
 217         IWL_AGG_OFF = 0,
 218         IWL_AGG_ON,
 219         IWL_EMPTYING_HW_QUEUE_ADDBA,
 220         IWL_EMPTYING_HW_QUEUE_DELBA,
 221 };
 222
 223 /**
 224  * struct iwl_ht_agg - aggregation state machine
 225
 226  * This structs holds the states for the BA agreement establishment and tear
 227  * down. It also holds the state during the BA session itself. This struct is
 228  * duplicated for each RA / TID.
 229
 230  * @rate_n_flags: Rate at which Tx was attempted. Holds the data between the
 231  *      Tx response (REPLY_TX), and the block ack notification
 232  *      (REPLY_COMPRESSED_BA).
 233  * @state: state of the BA agreement establishment / tear down.
 234  * @txq_id: Tx queue used by the BA session - used by the transport layer.
 235  *      Needed by the upper layer for debugfs only.
 236  * @wait_for_ba: Expect block-ack before next Tx reply
 237  */
 238 struct iwl_ht_agg {
 239         u32 rate_n_flags;
 240         enum iwl_agg_state state;
 241         u16 txq_id;
 242         bool wait_for_ba;
 243 };
 244
 245 /**
 246  * struct iwl_tid_data - one for each RA / TID
 247
 248  * This structs holds the states for each RA / TID.
 249
 250  * @seq_number: the next WiFi sequence number to use
 251  * @tfds_in_queue: number of packets sent to the HW queues.
 252  *      Exported for debugfs only
 253  * @agg: aggregation state machine
 254  */
 255 struct iwl_tid_data {
 256         u16 seq_number;
 257         u16 tfds_in_queue;
 258         struct iwl_ht_agg agg;
 259 };
 260
 261 /**
 262  * struct iwl_shared - shared fields for all the layers of the driver
 263  *
 264  * @dbg_level_dev: dbg level set per device. Prevails on
 265  *      iwlagn_mod_params.debug_level if set (!= 0)
 266  * @ucode_owner: IWL_OWNERSHIP_*
 267  * @cmd_queue: command queue number
 268  * @status: STATUS_*
 269  * @valid_contexts: microcode/device supports multiple contexts
 270  * @bus: pointer to the bus layer data
 271  * @priv: pointer to the upper layer data
 272  * @hw_params: see struct iwl_hw_params
 273  * @workqueue: the workqueue used by all the layers of the driver
 274  * @lock: protect general shared data
 275  * @sta_lock: protects the station table.
 276  *      If lock and sta_lock are needed, lock must be acquired first.
 277  * @mutex:
 278  */
 279 struct iwl_shared {
 280 #ifdef CONFIG_IWLWIFI_DEBUG
 281         u32 dbg_level_dev;
 282 #endif /* CONFIG_IWLWIFI_DEBUG */
 283
 284 #define IWL_OWNERSHIP_DRIVER    0
 285 #define IWL_OWNERSHIP_TM        1
 286         u8 ucode_owner;
 287         u8 cmd_queue;
 288         unsigned long status;
 289         bool wowlan;
 290         u8 valid_contexts;
 291
 292         struct iwl_bus *bus;
 293         struct iwl_priv *priv;
 294         struct iwl_trans *trans;
 295         struct iwl_hw_params hw_params;
 296
 297         struct workqueue_struct *workqueue;
 298         spinlock_t lock;
 299         spinlock_t sta_lock;
 300         struct mutex mutex;
 301
 302         struct iwl_tid_data tid_data[IWLAGN_STATION_COUNT][IWL_MAX_TID_COUNT];
 303
 304         wait_queue_head_t wait_command_queue;
 305 };
 306
 307 /*Whatever _m is (iwl_trans, iwl_priv, iwl_bus, these macros will work */
 308 #define priv(_m)        ((_m)->shrd->priv)
 309 #define bus(_m)         ((_m)->shrd->bus)
 310 #define trans(_m)       ((_m)->shrd->trans)
 311 #define hw_params(_m)   ((_m)->shrd->hw_params)
 312
 313 #ifdef CONFIG_IWLWIFI_DEBUG
 314 /*
 315  * iwl_get_debug_level: Return active debug level for device
 316  *
 317  * Using sysfs it is possible to set per device debug level. This debug
 318  * level will be used if set, otherwise the global debug level which can be
 319  * set via module parameter is used.
 320  */
 321 static inline u32 iwl_get_debug_level(struct iwl_shared *shrd)
 322 {
 323         if (shrd->dbg_level_dev)
 324                 return shrd->dbg_level_dev;
 325         else
 326                 return iwlagn_mod_params.debug_level;
 327 }
 328 #else
 329 static inline u32 iwl_get_debug_level(struct iwl_shared *shrd)
 330 {
 331         return iwlagn_mod_params.debug_level;
 332 }
 333 #endif
 334
 335 static inline void iwl_free_pages(struct iwl_shared *shrd, unsigned long page)
 336 {
 337         free_pages(page, shrd->hw_params.rx_page_order);
 338 }
 339
 340 /**
 341  * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
 342  * @index -- current index
 343  * @n_bd -- total number of entries in queue (must be power of 2)
 344  */
 345 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 346 {
 347         return ++index & (n_bd - 1);
 348 }
 349
 350 /**
 351  * iwl_queue_dec_wrap - decrement queue index, wrap back to end
 352  * @index -- current index
 353  * @n_bd -- total number of entries in queue (must be power of 2)
 354  */
 355 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 356 {
 357         return --index & (n_bd - 1);
 358 }
 359
 360 struct iwl_rx_mem_buffer {
 361         dma_addr_t page_dma;
 362         struct page *page;
 363         struct list_head list;
 364 };
 365
 366 #define rxb_addr(r) page_address(r->page)
 367
 368 /*
 369  * mac80211 queues, ACs, hardware queues, FIFOs.
 370  *
 371  * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
 372  *
 373  * Mac80211 uses the following numbers, which we get as from it
 374  * by way of skb_get_queue_mapping(skb):
 375  *
 376  *      VO      0
 377  *      VI      1
 378  *      BE      2
 379  *      BK      3
 380  *
 381  *
 382  * Regular (not A-MPDU) frames are put into hardware queues corresponding
 383  * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
 384  * own queue per aggregation session (RA/TID combination), such queues are
 385  * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
 386  * order to map frames to the right queue, we also need an AC->hw queue
 387  * mapping. This is implemented here.
 388  *
 389  * Due to the way hw queues are set up (by the hw specific modules like
 390  * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity
 391  * mapping.
 392  */
 393
 394 static const u8 tid_to_ac[] = {
 395         IEEE80211_AC_BE,
 396         IEEE80211_AC_BK,
 397         IEEE80211_AC_BK,
 398         IEEE80211_AC_BE,
 399         IEEE80211_AC_VI,
 400         IEEE80211_AC_VI,
 401         IEEE80211_AC_VO,
 402         IEEE80211_AC_VO
 403 };
 404
 405 static inline int get_ac_from_tid(u16 tid)
 406 {
 407         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
 408                 return tid_to_ac[tid];
 409
 410         /* no support for TIDs 8-15 yet */
 411         return -EINVAL;
 412 }
 413
 414 enum iwl_rxon_context_id {
 415         IWL_RXON_CTX_BSS,
 416         IWL_RXON_CTX_PAN,
 417
 418         NUM_IWL_RXON_CTX
 419 };
 420
 421 int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
 422                 struct iwl_cfg *cfg);
 423 void __devexit iwl_remove(struct iwl_priv * priv);
 424 struct iwl_device_cmd;
 425 int __must_check iwl_rx_dispatch(struct iwl_priv *priv,
 426                                  struct iwl_rx_mem_buffer *rxb,
 427                                  struct iwl_device_cmd *cmd);
 428
 429 int iwlagn_hw_valid_rtc_data_addr(u32 addr);
 430 void iwl_start_tx_ba_trans_ready(struct iwl_priv *priv,
 431                                  enum iwl_rxon_context_id ctx,
 432                                  u8 sta_id, u8 tid);
 433 void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
 434                                 enum iwl_rxon_context_id ctx,
 435                                 u8 sta_id, u8 tid);
 436 void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
 437 void iwl_nic_config(struct iwl_priv *priv);
 438 void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb);
 439 void iwl_apm_stop(struct iwl_priv *priv);
 440 int iwl_apm_init(struct iwl_priv *priv);
 441 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand);
 442 const char *get_cmd_string(u8 cmd);
 443 bool iwl_check_for_ct_kill(struct iwl_priv *priv);
 444
 445 void iwl_stop_sw_queue(struct iwl_priv *priv, u8 ac);
 446 void iwl_wake_sw_queue(struct iwl_priv *priv, u8 ac);
 447
 448 #ifdef CONFIG_IWLWIFI_DEBUGFS
 449 void iwl_reset_traffic_log(struct iwl_priv *priv);
 450 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 451
 452 #ifdef CONFIG_IWLWIFI_DEBUG
 453 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 454                              enum iwl_rxon_context_id ctxid);
 455 #else
 456 static inline void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 457                                            enum iwl_rxon_context_id ctxid)
 458 {
 459 }
 460 #endif
 461
 462 #define IWL_CMD(x) case x: return #x
 463 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
 464
 465 #define IWL_TRAFFIC_ENTRIES     (256)
 466 #define IWL_TRAFFIC_ENTRY_SIZE  (64)
 467
 468 /*****************************************************
 469 * DRIVER STATUS FUNCTIONS
 470 ******************************************************/
 471 #define STATUS_HCMD_ACTIVE      0       /* host command in progress */
 472 /* 1 is unused (used to be STATUS_HCMD_SYNC_ACTIVE) */
 473 #define STATUS_INT_ENABLED      2
 474 #define STATUS_RF_KILL_HW       3
 475 #define STATUS_CT_KILL          4
 476 #define STATUS_INIT             5
 477 #define STATUS_ALIVE            6
 478 #define STATUS_READY            7
 479 #define STATUS_TEMPERATURE      8
 480 #define STATUS_GEO_CONFIGURED   9
 481 #define STATUS_EXIT_PENDING     10
 482 #define STATUS_STATISTICS       12
 483 #define STATUS_SCANNING         13
 484 #define STATUS_SCAN_ABORTING    14
 485 #define STATUS_SCAN_HW          15
 486 #define STATUS_POWER_PMI        16
 487 #define STATUS_FW_ERROR         17
 488 #define STATUS_DEVICE_ENABLED   18
 489 #define STATUS_CHANNEL_SWITCH_PENDING 19
 490 #define STATUS_SCAN_COMPLETE    20
 491
 492 static inline int iwl_is_ready(struct iwl_shared *shrd)
 493 {
 494         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 495          * set but EXIT_PENDING is not */
 496         return test_bit(STATUS_READY, &shrd->status) &&
 497                test_bit(STATUS_GEO_CONFIGURED, &shrd->status) &&
 498                !test_bit(STATUS_EXIT_PENDING, &shrd->status);
 499 }
 500
 501 static inline int iwl_is_alive(struct iwl_shared *shrd)
 502 {
 503         return test_bit(STATUS_ALIVE, &shrd->status);
 504 }
 505
 506 static inline int iwl_is_init(struct iwl_shared *shrd)
 507 {
 508         return test_bit(STATUS_INIT, &shrd->status);
 509 }
 510
 511 static inline int iwl_is_rfkill_hw(struct iwl_shared *shrd)
 512 {
 513         return test_bit(STATUS_RF_KILL_HW, &shrd->status);
 514 }
 515
 516 static inline int iwl_is_rfkill(struct iwl_shared *shrd)
 517 {
 518         return iwl_is_rfkill_hw(shrd);
 519 }
 520
 521 static inline int iwl_is_ctkill(struct iwl_shared *shrd)
 522 {
 523         return test_bit(STATUS_CT_KILL, &shrd->status);
 524 }
 525
 526 static inline int iwl_is_ready_rf(struct iwl_shared *shrd)
 527 {
 528         if (iwl_is_rfkill(shrd))
 529                 return 0;
 530
 531         return iwl_is_ready(shrd);
 532 }
 533
 534 #endif /* #__iwl_shared_h__ */