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

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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
  30  *
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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  * @sku: sku information from EEPROM
 286  * @eeprom_ver: EEPROM version
 287  * @eeprom_calib_ver: EEPROM calibration version
 288  * @lib: pointer to the lib ops
 289  * @additional_nic_config: additional nic configuration
 290  * @base_params: pointer to basic parameters
 291  * @ht_params: point to ht patameters
 292  * @bt_params: pointer to bt parameters
 293  * @pa_type: used by 6000 series only to identify the type of Power Amplifier
 294  * @need_temp_offset_calib: need to perform temperature offset calibration
 295  * @no_xtal_calib: some devices do not need crystal calibration data,
 296  *      don't send it to those
 297  * @scan_rx_antennas: available antenna for scan operation
 298  * @led_mode: 0=blinking, 1=On(RF On)/Off(RF Off)
 299  * @adv_pm: advance power management
 300  * @rx_with_siso_diversity: 1x1 device with rx antenna diversity
 301  * @internal_wimax_coex: internal wifi/wimax combo device
 302  * @iq_invert: I/Q inversion
 303  * @temp_offset_v2: support v2 of temperature offset calibration
 304  *
 305  * We enable the driver to be backward compatible wrt API version. The
 306  * driver specifies which APIs it supports (with @ucode_api_max being the
 307  * highest and @ucode_api_min the lowest). Firmware will only be loaded if
 308  * it has a supported API version.
 309  *
 310  * The ideal usage of this infrastructure is to treat a new ucode API
 311  * release as a new hardware revision.
 312  */
 313 struct iwl_cfg {
 314         /* params specific to an individual device within a device family */
 315         const char *name;
 316         const char *fw_name_pre;
 317         const unsigned int ucode_api_max;
 318         const unsigned int ucode_api_ok;
 319         const unsigned int ucode_api_min;
 320         const u32 max_data_size;
 321         const u32 max_inst_size;
 322         u8   valid_tx_ant;
 323         u8   valid_rx_ant;
 324         u16  sku;
 325         u16  eeprom_ver;
 326         u16  eeprom_calib_ver;
 327         const struct iwl_lib_ops *lib;
 328         void (*additional_nic_config)(struct iwl_priv *priv);
 329         /* params not likely to change within a device family */
 330         struct iwl_base_params *base_params;
 331         /* params likely to change within a device family */
 332         struct iwl_ht_params *ht_params;
 333         struct iwl_bt_params *bt_params;
 334         enum iwl_pa_type pa_type;         /* if used set to IWL_PA_SYSTEM */
 335         const bool need_temp_offset_calib; /* if used set to true */
 336         const bool no_xtal_calib;
 337         u8 scan_rx_antennas[IEEE80211_NUM_BANDS];
 338         enum iwl_led_mode led_mode;
 339         const bool adv_pm;
 340         const bool rx_with_siso_diversity;
 341         const bool internal_wimax_coex;
 342         const bool iq_invert;
 343         const bool temp_offset_v2;
 344 };
 345
 346 /**
 347  * struct iwl_shared - shared fields for all the layers of the driver
 348  *
 349  * @ucode_owner: IWL_OWNERSHIP_*
 350  * @cmd_queue: command queue number
 351  * @status: STATUS_*
 352  * @wowlan: are we running wowlan uCode
 353  * @valid_contexts: microcode/device supports multiple contexts
 354  * @bus: pointer to the bus layer data
 355  * @cfg: see struct iwl_cfg
 356  * @priv: pointer to the upper layer data
 357  * @trans: pointer to the transport layer data
 358  * @nic: pointer to the nic data
 359  * @hw_params: see struct iwl_hw_params
 360  * @lock: protect general shared data
 361  * @mutex:
 362  * @wait_command_queue: the wait_queue for SYNC host command nad uCode load
 363  * @eeprom: pointer to the eeprom/OTP image
 364  * @ucode_type: indicator of loaded ucode image
 365  * @notif_waits: things waiting for notification
 366  * @notif_wait_lock: lock protecting notification
 367  * @notif_waitq: head of notification wait queue
 368  * @device_pointers: pointers to ucode event tables
 369  */
 370 struct iwl_shared {
 371 #define IWL_OWNERSHIP_DRIVER    0
 372 #define IWL_OWNERSHIP_TM        1
 373         u8 ucode_owner;
 374         u8 cmd_queue;
 375         unsigned long status;
 376         bool wowlan;
 377         u8 valid_contexts;
 378
 379         struct iwl_cfg *cfg;
 380         struct iwl_priv *priv;
 381         struct iwl_trans *trans;
 382         struct iwl_nic *nic;
 383         struct iwl_hw_params hw_params;
 384
 385         struct mutex mutex;
 386
 387         wait_queue_head_t wait_command_queue;
 388
 389         /* eeprom -- this is in the card's little endian byte order */
 390         u8 *eeprom;
 391
 392         /* ucode related variables */
 393         enum iwl_ucode_type ucode_type;
 394
 395         /* notification wait support */
 396         struct list_head notif_waits;
 397         spinlock_t notif_wait_lock;
 398         wait_queue_head_t notif_waitq;
 399
 400         struct {
 401                 u32 error_event_table;
 402                 u32 log_event_table;
 403         } device_pointers;
 404
 405 };
 406
 407 /*Whatever _m is (iwl_trans, iwl_priv, these macros will work */
 408 #define priv(_m)        ((_m)->shrd->priv)
 409 #define cfg(_m)         ((_m)->shrd->cfg)
 410 #define nic(_m)         ((_m)->shrd->nic)
 411 #define trans(_m)       ((_m)->shrd->trans)
 412 #define hw_params(_m)   ((_m)->shrd->hw_params)
 413
 414 static inline bool iwl_have_debug_level(u32 level)
 415 {
 416         return iwlagn_mod_params.debug_level & level;
 417 }
 418
 419 static inline void iwl_free_pages(struct iwl_shared *shrd, unsigned long page)
 420 {
 421         free_pages(page, shrd->hw_params.rx_page_order);
 422 }
 423
 424 /**
 425  * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
 426  * @index -- current index
 427  * @n_bd -- total number of entries in queue (must be power of 2)
 428  */
 429 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 430 {
 431         return ++index & (n_bd - 1);
 432 }
 433
 434 /**
 435  * iwl_queue_dec_wrap - decrement queue index, wrap back to end
 436  * @index -- current index
 437  * @n_bd -- total number of entries in queue (must be power of 2)
 438  */
 439 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 440 {
 441         return --index & (n_bd - 1);
 442 }
 443
 444 struct iwl_rx_mem_buffer {
 445         dma_addr_t page_dma;
 446         struct page *page;
 447         struct list_head list;
 448 };
 449
 450 #define rxb_addr(r) page_address(r->page)
 451
 452 /*
 453  * mac80211 queues, ACs, hardware queues, FIFOs.
 454  *
 455  * Cf. http://wireless.kernel.org/en/developers/Documentation/mac80211/queues
 456  *
 457  * Mac80211 uses the following numbers, which we get as from it
 458  * by way of skb_get_queue_mapping(skb):
 459  *
 460  *      VO      0
 461  *      VI      1
 462  *      BE      2
 463  *      BK      3
 464  *
 465  *
 466  * Regular (not A-MPDU) frames are put into hardware queues corresponding
 467  * to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
 468  * own queue per aggregation session (RA/TID combination), such queues are
 469  * set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
 470  * order to map frames to the right queue, we also need an AC->hw queue
 471  * mapping. This is implemented here.
 472  *
 473  * Due to the way hw queues are set up (by the hw specific modules like
 474  * iwl-4965.c, iwl-5000.c etc.), the AC->hw queue mapping is the identity
 475  * mapping.
 476  */
 477
 478 static const u8 tid_to_ac[] = {
 479         IEEE80211_AC_BE,
 480         IEEE80211_AC_BK,
 481         IEEE80211_AC_BK,
 482         IEEE80211_AC_BE,
 483         IEEE80211_AC_VI,
 484         IEEE80211_AC_VI,
 485         IEEE80211_AC_VO,
 486         IEEE80211_AC_VO
 487 };
 488
 489 static inline int get_ac_from_tid(u16 tid)
 490 {
 491         if (likely(tid < ARRAY_SIZE(tid_to_ac)))
 492                 return tid_to_ac[tid];
 493
 494         /* no support for TIDs 8-15 yet */
 495         return -EINVAL;
 496 }
 497
 498 enum iwl_rxon_context_id {
 499         IWL_RXON_CTX_BSS,
 500         IWL_RXON_CTX_PAN,
 501
 502         NUM_IWL_RXON_CTX
 503 };
 504
 505 int iwlagn_hw_valid_rtc_data_addr(u32 addr);
 506 void iwl_nic_config(struct iwl_priv *priv);
 507 const char *get_cmd_string(u8 cmd);
 508 bool iwl_check_for_ct_kill(struct iwl_priv *priv);
 509
 510
 511 /* notification wait support */
 512 void iwl_abort_notification_waits(struct iwl_shared *shrd);
 513 void __acquires(wait_entry)
 514 iwl_init_notification_wait(struct iwl_shared *shrd,
 515                               struct iwl_notification_wait *wait_entry,
 516                               u8 cmd,
 517                               void (*fn)(struct iwl_trans *trans,
 518                                          struct iwl_rx_packet *pkt,
 519                                          void *data),
 520                               void *fn_data);
 521 int __must_check __releases(wait_entry)
 522 iwl_wait_notification(struct iwl_shared *shrd,
 523                          struct iwl_notification_wait *wait_entry,
 524                          unsigned long timeout);
 525 void __releases(wait_entry)
 526 iwl_remove_notification(struct iwl_shared *shrd,
 527                            struct iwl_notification_wait *wait_entry);
 528
 529 #define IWL_CMD(x) case x: return #x
 530 #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
 531
 532 #define IWL_TRAFFIC_ENTRIES     (256)
 533 #define IWL_TRAFFIC_ENTRY_SIZE  (64)
 534
 535 /*****************************************************
 536 * DRIVER STATUS FUNCTIONS
 537 ******************************************************/
 538 #define STATUS_HCMD_ACTIVE      0       /* host command in progress */
 539 /* 1 is unused (used to be STATUS_HCMD_SYNC_ACTIVE) */
 540 #define STATUS_INT_ENABLED      2
 541 #define STATUS_RF_KILL_HW       3
 542 #define STATUS_CT_KILL          4
 543 #define STATUS_INIT             5
 544 #define STATUS_ALIVE            6
 545 #define STATUS_READY            7
 546 #define STATUS_TEMPERATURE      8
 547 #define STATUS_GEO_CONFIGURED   9
 548 #define STATUS_EXIT_PENDING     10
 549 #define STATUS_STATISTICS       12
 550 #define STATUS_SCANNING         13
 551 #define STATUS_SCAN_ABORTING    14
 552 #define STATUS_SCAN_HW          15
 553 #define STATUS_POWER_PMI        16
 554 #define STATUS_FW_ERROR         17
 555 #define STATUS_DEVICE_ENABLED   18
 556 #define STATUS_CHANNEL_SWITCH_PENDING 19
 557 #define STATUS_SCAN_COMPLETE    20
 558
 559 static inline int iwl_is_ready(struct iwl_shared *shrd)
 560 {
 561         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 562          * set but EXIT_PENDING is not */
 563         return test_bit(STATUS_READY, &shrd->status) &&
 564                test_bit(STATUS_GEO_CONFIGURED, &shrd->status) &&
 565                !test_bit(STATUS_EXIT_PENDING, &shrd->status);
 566 }
 567
 568 static inline int iwl_is_alive(struct iwl_shared *shrd)
 569 {
 570         return test_bit(STATUS_ALIVE, &shrd->status);
 571 }
 572
 573 static inline int iwl_is_init(struct iwl_shared *shrd)
 574 {
 575         return test_bit(STATUS_INIT, &shrd->status);
 576 }
 577
 578 static inline int iwl_is_rfkill_hw(struct iwl_shared *shrd)
 579 {
 580         return test_bit(STATUS_RF_KILL_HW, &shrd->status);
 581 }
 582
 583 static inline int iwl_is_rfkill(struct iwl_shared *shrd)
 584 {
 585         return iwl_is_rfkill_hw(shrd);
 586 }
 587
 588 static inline int iwl_is_ctkill(struct iwl_shared *shrd)
 589 {
 590         return test_bit(STATUS_CT_KILL, &shrd->status);
 591 }
 592
 593 static inline int iwl_is_ready_rf(struct iwl_shared *shrd)
 594 {
 595         if (iwl_is_rfkill(shrd))
 596                 return 0;
 597
 598         return iwl_is_ready(shrd);
 599 }
 600
 601 #endif /* #__iwl_shared_h__ */