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 - 2012 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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  17  * General Public License for more details.
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  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  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_priv;
  98 struct iwl_trans;
  99 struct iwl_sensitivity_ranges;
 100 struct iwl_trans_ops;
 101
 102 #define DRV_NAME        "iwlwifi"
 103 #define IWLWIFI_VERSION "in-tree:"
 104 #define DRV_COPYRIGHT   "Copyright(c) 2003-2012 Intel Corporation"
 105 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
 106
 107 extern struct iwl_mod_params iwlagn_mod_params;
 108
 109 #define IWL_DISABLE_HT_ALL      BIT(0)
 110 #define IWL_DISABLE_HT_TXAGG    BIT(1)
 111 #define IWL_DISABLE_HT_RXAGG    BIT(2)
 112
 113 /**
 114  * struct iwl_mod_params
 115  *
 116  * Holds the module parameters
 117  *
 118  * @sw_crypto: using hardware encryption, default = 0
 119  * @num_of_queues: number of tx queue, HW dependent
 120  * @disable_11n: disable 11n capabilities, default = 0,
 121  *      use IWL_DISABLE_HT_* constants
 122  * @amsdu_size_8K: enable 8K amsdu size, default = 1
 123  * @antenna: both antennas (use diversity), default = 0
 124  * @restart_fw: restart firmware, default = 1
 125  * @plcp_check: enable plcp health check, default = true
 126  * @ack_check: disable ack health check, default = false
 127  * @wd_disable: enable stuck queue check, default = 0
 128  * @bt_coex_active: enable bt coex, default = true
 129  * @led_mode: system default, default = 0
 130  * @no_sleep_autoadjust: disable autoadjust, default = true
 131  * @power_save: disable power save, default = false
 132  * @power_level: power level, default = 1
 133  * @debug_level: levels are IWL_DL_*
 134  * @ant_coupling: antenna coupling in dB, default = 0
 135  * @bt_ch_announce: BT channel inhibition, default = enable
 136  * @wanted_ucode_alternative: ucode alternative to use, default = 1
 137  * @auto_agg: enable agg. without check, default = true
 138  */
 139 struct iwl_mod_params {
 140         int sw_crypto;
 141         int num_of_queues;
 142         unsigned int disable_11n;
 143         int amsdu_size_8K;
 144         int antenna;
 145         int restart_fw;
 146         bool plcp_check;
 147         bool ack_check;
 148         int  wd_disable;
 149         bool bt_coex_active;
 150         int led_mode;
 151         bool no_sleep_autoadjust;
 152         bool power_save;
 153         int power_level;
 154         u32 debug_level;
 155         int ant_coupling;
 156         bool bt_ch_announce;
 157         int wanted_ucode_alternative;
 158         bool auto_agg;
 159 };
 160
 161 /**
 162  * struct iwl_hw_params
 163  *
 164  * Holds the module parameters
 165  *
 166  * @max_txq_num: Max # Tx queues supported
 167  * @num_ampdu_queues: num of ampdu queues
 168  * @tx_chains_num: Number of TX chains
 169  * @rx_chains_num: Number of RX chains
 170  * @valid_tx_ant: usable antennas for TX
 171  * @valid_rx_ant: usable antennas for RX
 172  * @ht40_channel: is 40MHz width possible: BIT(IEEE80211_BAND_XXX)
 173  * @sku: sku read from EEPROM
 174  * @rx_page_order: Rx buffer page order
 175  * @ct_kill_threshold: temperature threshold - in hw dependent unit
 176  * @ct_kill_exit_threshold: when to reeable the device - in hw dependent unit
 177  *      relevant for 1000, 6000 and up
 178  * @wd_timeout: TX queues watchdog timeout
 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 ct_kill_threshold;
 193         u32 ct_kill_exit_threshold;
 194         unsigned int wd_timeout;
 195
 196         const struct iwl_sensitivity_ranges *sens;
 197 };
 198
 199 /**
 200  * enum iwl_ucode_type
 201  *
 202  * The type of ucode currently loaded on the hardware.
 203  *
 204  * @IWL_UCODE_NONE: No ucode loaded
 205  * @IWL_UCODE_REGULAR: Normal runtime ucode
 206  * @IWL_UCODE_INIT: Initial ucode
 207  * @IWL_UCODE_WOWLAN: Wake on Wireless enabled ucode
 208  */
 209 enum iwl_ucode_type {
 210         IWL_UCODE_NONE,
 211         IWL_UCODE_REGULAR,
 212         IWL_UCODE_INIT,
 213         IWL_UCODE_WOWLAN,
 214 };
 215
 216 /**
 217  * struct iwl_notification_wait - notification wait entry
 218  * @list: list head for global list
 219  * @fn: function called with the notification
 220  * @cmd: command ID
 221  *
 222  * This structure is not used directly, to wait for a
 223  * notification declare it on the stack, and call
 224  * iwlagn_init_notification_wait() with appropriate
 225  * parameters. Then do whatever will cause the ucode
 226  * to notify the driver, and to wait for that then
 227  * call iwlagn_wait_notification().
 228  *
 229  * Each notification is one-shot. If at some point we
 230  * need to support multi-shot notifications (which
 231  * can't be allocated on the stack) we need to modify
 232  * the code for them.
 233  */
 234 struct iwl_notification_wait {
 235         struct list_head list;
 236
 237         void (*fn)(struct iwl_trans *trans, struct iwl_rx_packet *pkt,
 238                    void *data);
 239         void *fn_data;
 240
 241         u8 cmd;
 242         bool triggered, aborted;
 243 };
 244
 245 /**
 246  * enum iwl_pa_type - Power Amplifier type
 247  * @IWL_PA_SYSTEM:  based on uCode configuration
 248  * @IWL_PA_INTERNAL: use Internal only
 249  */
 250 enum iwl_pa_type {
 251         IWL_PA_SYSTEM = 0,
 252         IWL_PA_INTERNAL = 1,
 253 };
 254
 255 /*
 256  * LED mode
 257  *    IWL_LED_DEFAULT:  use device default
 258  *    IWL_LED_RF_STATE: turn LED on/off based on RF state
 259  *                      LED ON  = RF ON
 260  *                      LED OFF = RF OFF
 261  *    IWL_LED_BLINK:    adjust led blink rate based on blink table
 262  *    IWL_LED_DISABLE:  led disabled
 263  */
 264 enum iwl_led_mode {
 265         IWL_LED_DEFAULT,
 266         IWL_LED_RF_STATE,
 267         IWL_LED_BLINK,
 268         IWL_LED_DISABLE,
 269 };
 270
 271 /**
 272  * struct iwl_cfg
 273  * @name: Offical name of the device
 274  * @fw_name_pre: Firmware filename prefix. The api version and extension
 275  *      (.ucode) will be added to filename before loading from disk. The
 276  *      filename is constructed as fw_name_pre<api>.ucode.
 277  * @ucode_api_max: Highest version of uCode API supported by driver.
 278  * @ucode_api_ok: oldest version of the uCode API that is OK to load
 279  *      without a warning, for use in transitions
 280  * @ucode_api_min: Lowest version of uCode API supported by driver.
 281  * @max_inst_size: The maximal length of the fw inst section
 282  * @max_data_size: The maximal length of the fw data section
 283  * @valid_tx_ant: valid transmit antenna
 284  * @valid_rx_ant: valid receive antenna
 285  * @eeprom_ver: EEPROM version
 286  * @eeprom_calib_ver: EEPROM calibration version
 287  * @lib: pointer to the lib ops
 288  * @additional_nic_config: additional nic configuration
 289  * @base_params: pointer to basic parameters
 290  * @ht_params: point to ht patameters
 291  * @bt_params: pointer to bt parameters
 292  * @pa_type: used by 6000 series only to identify the type of Power Amplifier
 293  * @need_temp_offset_calib: need to perform temperature offset calibration
 294  * @no_xtal_calib: some devices do not need crystal calibration data,
 295  *      don't send it to those
 296  * @scan_rx_antennas: available antenna for scan operation
 297  * @led_mode: 0=blinking, 1=On(RF On)/Off(RF Off)
 298  * @adv_pm: advance power management
 299  * @rx_with_siso_diversity: 1x1 device with rx antenna diversity
 300  * @internal_wimax_coex: internal wifi/wimax combo device
 301  * @iq_invert: I/Q inversion
 302  * @temp_offset_v2: support v2 of temperature offset calibration
 303  *
 304  * We enable the driver to be backward compatible wrt API version. The
 305  * driver specifies which APIs it supports (with @ucode_api_max being the
 306  * highest and @ucode_api_min the lowest). Firmware will only be loaded if
 307  * it has a supported API version.
 308  *
 309  * The ideal usage of this infrastructure is to treat a new ucode API
 310  * release as a new hardware revision.
 311  */
 312 struct iwl_cfg {
 313         /* params specific to an individual device within a device family */
 314         const char *name;
 315         const char *fw_name_pre;
 316         const unsigned int ucode_api_max;
 317         const unsigned int ucode_api_ok;
 318         const unsigned int ucode_api_min;
 319         const u32 max_data_size;
 320         const u32 max_inst_size;
 321         u8   valid_tx_ant;
 322         u8   valid_rx_ant;
 323         u16  eeprom_ver;
 324         u16  eeprom_calib_ver;
 325         const struct iwl_lib_ops *lib;
 326         void (*additional_nic_config)(struct iwl_priv *priv);
 327         /* params not likely to change within a device family */
 328         struct iwl_base_params *base_params;
 329         /* params likely to change within a device family */
 330         struct iwl_ht_params *ht_params;
 331         struct iwl_bt_params *bt_params;
 332         enum iwl_pa_type pa_type;         /* if used set to IWL_PA_SYSTEM */
 333         const bool need_temp_offset_calib; /* if used set to true */
 334         const bool no_xtal_calib;
 335         u8 scan_rx_antennas[IEEE80211_NUM_BANDS];
 336         enum iwl_led_mode led_mode;
 337         const bool adv_pm;
 338         const bool rx_with_siso_diversity;
 339         const bool internal_wimax_coex;
 340         const bool iq_invert;
 341         const bool temp_offset_v2;
 342 };
 343
 344 /**
 345  * struct iwl_shared - shared fields for all the layers of the driver
 346  *
 347  * @ucode_owner: IWL_OWNERSHIP_*
 348  * @cmd_queue: command queue number
 349  * @status: STATUS_*
 350  * @wowlan: are we running wowlan uCode
 351  * @valid_contexts: microcode/device supports multiple contexts
 352  * @bus: pointer to the bus layer data
 353  * @cfg: see struct iwl_cfg
 354  * @priv: pointer to the upper layer data
 355  * @trans: pointer to the transport layer data
 356  * @nic: pointer to the nic data
 357  * @hw_params: see struct iwl_hw_params
 358  * @lock: protect general shared data
 359  * @mutex:
 360  * @wait_command_queue: the wait_queue for SYNC host command nad uCode load
 361  * @eeprom: pointer to the eeprom/OTP image
 362  * @ucode_type: indicator of loaded ucode image
 363  * @notif_waits: things waiting for notification
 364  * @notif_wait_lock: lock protecting notification
 365  * @notif_waitq: head of notification wait queue
 366  * @device_pointers: pointers to ucode event tables
 367  */
 368 struct iwl_shared {
 369 #define IWL_OWNERSHIP_DRIVER    0
 370 #define IWL_OWNERSHIP_TM        1
 371         u8 ucode_owner;
 372         u8 cmd_queue;
 373         unsigned long status;
 374         bool wowlan;
 375         u8 valid_contexts;
 376
 377         const struct iwl_cfg *cfg;
 378         struct iwl_priv *priv;
 379         struct iwl_trans *trans;
 380         struct iwl_nic *nic;
 381         struct iwl_hw_params hw_params;
 382
 383         struct mutex mutex;
 384
 385         wait_queue_head_t wait_command_queue;
 386
 387         /* eeprom -- this is in the card's little endian byte order */
 388         u8 *eeprom;
 389
 390         /* ucode related variables */
 391         enum iwl_ucode_type ucode_type;
 392
 393         /* notification wait support */
 394         struct list_head notif_waits;
 395         spinlock_t notif_wait_lock;
 396         wait_queue_head_t notif_waitq;
 397
 398         struct {
 399                 u32 error_event_table;
 400                 u32 log_event_table;
 401         } device_pointers;
 402
 403 };
 404
 405 /*Whatever _m is (iwl_trans, iwl_priv, these macros will work */
 406 #define priv(_m)        ((_m)->shrd->priv)
 407 #define cfg(_m)         ((_m)->shrd->cfg)
 408 #define nic(_m)         ((_m)->shrd->nic)
 409 #define trans(_m)       ((_m)->shrd->trans)
 410 #define hw_params(_m)   ((_m)->shrd->hw_params)
 411
 412 static inline bool iwl_have_debug_level(u32 level)
 413 {
 414         return iwlagn_mod_params.debug_level & level;
 415 }
 416
 417 static inline void iwl_free_pages(struct iwl_shared *shrd, unsigned long page)
 418 {
 419         free_pages(page, shrd->hw_params.rx_page_order);
 420 }
 421
 422 /**
 423  * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
 424  * @index -- current index
 425  * @n_bd -- total number of entries in queue (must be power of 2)
 426  */
 427 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 428 {
 429         return ++index & (n_bd - 1);
 430 }
 431
 432 /**
 433  * iwl_queue_dec_wrap - decrement queue index, wrap back to end
 434  * @index -- current index
 435  * @n_bd -- total number of entries in queue (must be power of 2)
 436  */
 437 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 438 {
 439         return --index & (n_bd - 1);
 440 }
 441
 442 struct iwl_rx_mem_buffer {
 443         dma_addr_t page_dma;
 444         struct page *page;
 445         struct list_head list;
 446 };
 447
 448 #define rxb_addr(r) page_address(r->page)
 449
 450 /*
 451  * mac80211 queues, ACs, hardware queues, FIFOs.
 452  *
 453  * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
 454  *
 455  * Mac80211 uses the following numbers, which we get as from it
 456  * by way of skb_get_queue_mapping(skb):
 457  *
 458  *      VO      0
 459  *      VI      1
 460  *      BE      2
 461  *      BK      3
 462  *
 463  *
 464  * Regular (not A-MPDU) frames are put into hardware queues corresponding
 465  * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
 466  * own queue per aggregation session (RA/TID combination), such queues are
 467  * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
 468  * order to map frames to the right queue, we also need an AC->hw queue
 469  * mapping. This is implemented here.
 470  *
 471  * Due to the way hw queues are set up (by the hw specific modules like
 472  * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity
 473  * mapping.
 474  */
 475
 476 static const u8 tid_to_ac[] = {
 477         IEEE80211_AC_BE,
 478         IEEE80211_AC_BK,
 479         IEEE80211_AC_BK,
 480         IEEE80211_AC_BE,
 481         IEEE80211_AC_VI,
 482         IEEE80211_AC_VI,
 483         IEEE80211_AC_VO,
 484         IEEE80211_AC_VO
 485 };
 486
 487 static inline int get_ac_from_tid(u16 tid)
 488 {
 489         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
 490                 return tid_to_ac[tid];
 491
 492         /* no support for TIDs 8-15 yet */
 493         return -EINVAL;
 494 }
 495
 496 enum iwl_rxon_context_id {
 497         IWL_RXON_CTX_BSS,
 498         IWL_RXON_CTX_PAN,
 499
 500         NUM_IWL_RXON_CTX
 501 };
 502
 503 int iwlagn_hw_valid_rtc_data_addr(u32 addr);
 504 void iwl_nic_config(struct iwl_priv *priv);
 505 const char *get_cmd_string(u8 cmd);
 506 bool iwl_check_for_ct_kill(struct iwl_priv *priv);
 507
 508
 509 /* notification wait support */
 510 void iwl_abort_notification_waits(struct iwl_shared *shrd);
 511 void __acquires(wait_entry)
 512 iwl_init_notification_wait(struct iwl_shared *shrd,
 513                               struct iwl_notification_wait *wait_entry,
 514                               u8 cmd,
 515                               void (*fn)(struct iwl_trans *trans,
 516                                          struct iwl_rx_packet *pkt,
 517                                          void *data),
 518                               void *fn_data);
 519 int __must_check __releases(wait_entry)
 520 iwl_wait_notification(struct iwl_shared *shrd,
 521                          struct iwl_notification_wait *wait_entry,
 522                          unsigned long timeout);
 523 void __releases(wait_entry)
 524 iwl_remove_notification(struct iwl_shared *shrd,
 525                            struct iwl_notification_wait *wait_entry);
 526
 527 #define IWL_CMD(x) case x: return #x
 528 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
 529
 530 #define IWL_TRAFFIC_ENTRIES     (256)
 531 #define IWL_TRAFFIC_ENTRY_SIZE  (64)
 532
 533 /*****************************************************
 534 * DRIVER STATUS FUNCTIONS
 535 ******************************************************/
 536 #define STATUS_HCMD_ACTIVE      0       /* host command in progress */
 537 /* 1 is unused (used to be STATUS_HCMD_SYNC_ACTIVE) */
 538 #define STATUS_INT_ENABLED      2
 539 #define STATUS_RF_KILL_HW       3
 540 #define STATUS_CT_KILL          4
 541 #define STATUS_INIT             5
 542 #define STATUS_ALIVE            6
 543 #define STATUS_READY            7
 544 #define STATUS_TEMPERATURE      8
 545 #define STATUS_GEO_CONFIGURED   9
 546 #define STATUS_EXIT_PENDING     10
 547 #define STATUS_STATISTICS       12
 548 #define STATUS_SCANNING         13
 549 #define STATUS_SCAN_ABORTING    14
 550 #define STATUS_SCAN_HW          15
 551 #define STATUS_POWER_PMI        16
 552 #define STATUS_FW_ERROR         17
 553 #define STATUS_DEVICE_ENABLED   18
 554 #define STATUS_CHANNEL_SWITCH_PENDING 19
 555 #define STATUS_SCAN_COMPLETE    20
 556
 557 static inline int iwl_is_ready(struct iwl_shared *shrd)
 558 {
 559         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 560          * set but EXIT_PENDING is not */
 561         return test_bit(STATUS_READY, &shrd->status) &&
 562                test_bit(STATUS_GEO_CONFIGURED, &shrd->status) &&
 563                !test_bit(STATUS_EXIT_PENDING, &shrd->status);
 564 }
 565
 566 static inline int iwl_is_alive(struct iwl_shared *shrd)
 567 {
 568         return test_bit(STATUS_ALIVE, &shrd->status);
 569 }
 570
 571 static inline int iwl_is_init(struct iwl_shared *shrd)
 572 {
 573         return test_bit(STATUS_INIT, &shrd->status);
 574 }
 575
 576 static inline int iwl_is_rfkill_hw(struct iwl_shared *shrd)
 577 {
 578         return test_bit(STATUS_RF_KILL_HW, &shrd->status);
 579 }
 580
 581 static inline int iwl_is_rfkill(struct iwl_shared *shrd)
 582 {
 583         return iwl_is_rfkill_hw(shrd);
 584 }
 585
 586 static inline int iwl_is_ctkill(struct iwl_shared *shrd)
 587 {
 588         return test_bit(STATUS_CT_KILL, &shrd->status);
 589 }
 590
 591 static inline int iwl_is_ready_rf(struct iwl_shared *shrd)
 592 {
 593         if (iwl_is_rfkill(shrd))
 594                 return 0;
 595
 596         return iwl_is_ready(shrd);
 597 }
 598
 599 #endif /* #__iwl_shared_h__ */