drivers/net/wireless/iwlwifi/mvm/fw-api-scan.h

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  63
  64 #ifndef __fw_api_scan_h__
  65 #define __fw_api_scan_h__
  66
  67 #include "fw-api.h"
  68
  69 /* Scan Commands, Responses, Notifications */
  70
  71 /* Masks for iwl_scan_channel.type flags */
  72 #define SCAN_CHANNEL_TYPE_PASSIVE       0
  73 #define SCAN_CHANNEL_TYPE_ACTIVE        BIT(0)
  74 #define SCAN_CHANNEL_NARROW_BAND        BIT(22)
  75
  76 /* Max number of IEs for direct SSID scans in a command */
  77 #define PROBE_OPTION_MAX                20
  78
  79 /**
  80  * struct iwl_scan_channel - entry in REPLY_SCAN_CMD channel table
  81  * @channel: band is selected by iwl_scan_cmd "flags" field
  82  * @tx_gain: gain for analog radio
  83  * @dsp_atten: gain for DSP
  84  * @active_dwell: dwell time for active scan in TU, typically 5-50
  85  * @passive_dwell: dwell time for passive scan in TU, typically 20-500
  86  * @type: type is broken down to these bits:
  87  *      bit 0: 0 = passive, 1 = active
  88  *      bits 1-20: SSID direct bit map. If any of these bits is set then
  89  *              the corresponding SSID IE is transmitted in probe request
  90  *              (bit i adds IE in position i to the probe request)
  91  *      bit 22: channel width, 0 = regular, 1 = TGj narrow channel
  92  *
  93  * @iteration_count:
  94  * @iteration_interval:
  95  * This struct is used once for each channel in the scan list.
  96  * Each channel can independently select:
  97  * 1)  SSID for directed active scans
  98  * 2)  Txpower setting (for rate specified within Tx command)
  99  * 3)  How long to stay on-channel (behavior may be modified by quiet_time,
 100  *     quiet_plcp_th, good_CRC_th)
 101  *
 102  * To avoid uCode errors, make sure the following are true (see comments
 103  * under struct iwl_scan_cmd about max_out_time and quiet_time):
 104  * 1)  If using passive_dwell (i.e. passive_dwell != 0):
 105  *     active_dwell <= passive_dwell (< max_out_time if max_out_time != 0)
 106  * 2)  quiet_time <= active_dwell
 107  * 3)  If restricting off-channel time (i.e. max_out_time !=0):
 108  *     passive_dwell < max_out_time
 109  *     active_dwell < max_out_time
 110  */
 111 struct iwl_scan_channel {
 112         __le32 type;
 113         __le16 channel;
 114         __le16 iteration_count;
 115         __le32 iteration_interval;
 116         __le16 active_dwell;
 117         __le16 passive_dwell;
 118 } __packed; /* SCAN_CHANNEL_CONTROL_API_S_VER_1 */
 119
 120 /**
 121  * struct iwl_ssid_ie - directed scan network information element
 122  *
 123  * Up to 20 of these may appear in REPLY_SCAN_CMD,
 124  * selected by "type" bit field in struct iwl_scan_channel;
 125  * each channel may select different ssids from among the 20 entries.
 126  * SSID IEs get transmitted in reverse order of entry.
 127  */
 128 struct iwl_ssid_ie {
 129         u8 id;
 130         u8 len;
 131         u8 ssid[IEEE80211_MAX_SSID_LEN];
 132 } __packed; /* SCAN_DIRECT_SSID_IE_API_S_VER_1 */
 133
 134 /**
 135  * iwl_scan_flags - masks for scan command flags
 136  *@SCAN_FLAGS_PERIODIC_SCAN:
 137  *@SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX:
 138  *@SCAN_FLAGS_DELAYED_SCAN_LOWBAND:
 139  *@SCAN_FLAGS_DELAYED_SCAN_HIGHBAND:
 140  *@SCAN_FLAGS_FRAGMENTED_SCAN:
 141  */
 142 enum iwl_scan_flags {
 143         SCAN_FLAGS_PERIODIC_SCAN                = BIT(0),
 144         SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX   = BIT(1),
 145         SCAN_FLAGS_DELAYED_SCAN_LOWBAND         = BIT(2),
 146         SCAN_FLAGS_DELAYED_SCAN_HIGHBAND        = BIT(3),
 147         SCAN_FLAGS_FRAGMENTED_SCAN              = BIT(4),
 148 };
 149
 150 /**
 151  * enum iwl_scan_type - Scan types for scan command
 152  * @SCAN_TYPE_FORCED:
 153  * @SCAN_TYPE_BACKGROUND:
 154  * @SCAN_TYPE_OS:
 155  * @SCAN_TYPE_ROAMING:
 156  * @SCAN_TYPE_ACTION:
 157  * @SCAN_TYPE_DISCOVERY:
 158  * @SCAN_TYPE_DISCOVERY_FORCED:
 159  */
 160 enum iwl_scan_type {
 161         SCAN_TYPE_FORCED                = 0,
 162         SCAN_TYPE_BACKGROUND            = 1,
 163         SCAN_TYPE_OS                    = 2,
 164         SCAN_TYPE_ROAMING               = 3,
 165         SCAN_TYPE_ACTION                = 4,
 166         SCAN_TYPE_DISCOVERY             = 5,
 167         SCAN_TYPE_DISCOVERY_FORCED      = 6,
 168 }; /* SCAN_ACTIVITY_TYPE_E_VER_1 */
 169
 170 /* Maximal number of channels to scan */
 171 #define MAX_NUM_SCAN_CHANNELS 0x24
 172
 173 /**
 174  * struct iwl_scan_cmd - scan request command
 175  * ( SCAN_REQUEST_CMD = 0x80 )
 176  * @len: command length in bytes
 177  * @scan_flags: scan flags from SCAN_FLAGS_*
 178  * @channel_count: num of channels in channel list (1 - MAX_NUM_SCAN_CHANNELS)
 179  * @quiet_time: in msecs, dwell this time for active scan on quiet channels
 180  * @quiet_plcp_th: quiet PLCP threshold (channel is quiet if less than
 181  *      this number of packets were received (typically 1)
 182  * @passive2active: is auto switching from passive to active allowed (0 or 1)
 183  * @rxchain_sel_flags: RXON_RX_CHAIN_*
 184  * @max_out_time: in usecs, max out of serving channel time
 185  * @suspend_time: how long to pause scan when returning to service channel:
 186  *      bits 0-19: beacon interal in usecs (suspend before executing)
 187  *      bits 20-23: reserved
 188  *      bits 24-31: number of beacons (suspend between channels)
 189  * @rxon_flags: RXON_FLG_*
 190  * @filter_flags: RXON_FILTER_*
 191  * @tx_cmd: for active scans (zero for passive), w/o payload,
 192  *      no RS so specify TX rate
 193  * @direct_scan: direct scan SSIDs
 194  * @type: one of SCAN_TYPE_*
 195  * @repeats: how many time to repeat the scan
 196  */
 197 struct iwl_scan_cmd {
 198         __le16 len;
 199         u8 scan_flags;
 200         u8 channel_count;
 201         __le16 quiet_time;
 202         __le16 quiet_plcp_th;
 203         __le16 passive2active;
 204         __le16 rxchain_sel_flags;
 205         __le32 max_out_time;
 206         __le32 suspend_time;
 207         /* RX_ON_FLAGS_API_S_VER_1 */
 208         __le32 rxon_flags;
 209         __le32 filter_flags;
 210         struct iwl_tx_cmd tx_cmd;
 211         struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
 212         __le32 type;
 213         __le32 repeats;
 214
 215         /*
 216          * Probe request frame, followed by channel list.
 217          *
 218          * Size of probe request frame is specified by byte count in tx_cmd.
 219          * Channel list follows immediately after probe request frame.
 220          * Number of channels in list is specified by channel_count.
 221          * Each channel in list is of type:
 222          *
 223          * struct iwl_scan_channel channels[0];
 224          *
 225          * NOTE:  Only one band of channels can be scanned per pass.  You
 226          * must not mix 2.4GHz channels and 5.2GHz channels, and you must wait
 227          * for one scan to complete (i.e. receive SCAN_COMPLETE_NOTIFICATION)
 228          * before requesting another scan.
 229          */
 230         u8 data[0];
 231 } __packed; /* SCAN_REQUEST_FIXED_PART_API_S_VER_5 */
 232
 233 /* Response to scan request contains only status with one of these values */
 234 #define SCAN_RESPONSE_OK        0x1
 235 #define SCAN_RESPONSE_ERROR     0x2
 236
 237 /*
 238  * SCAN_ABORT_CMD = 0x81
 239  * When scan abort is requested, the command has no fields except the common
 240  * header. The response contains only a status with one of these values.
 241  */
 242 #define SCAN_ABORT_POSSIBLE     0x1
 243 #define SCAN_ABORT_IGNORED      0x2 /* no pending scans */
 244
 245 /* TODO: complete documentation */
 246 #define  SCAN_OWNER_STATUS 0x1
 247 #define  MEASURE_OWNER_STATUS 0x2
 248
 249 /**
 250  * struct iwl_scan_start_notif - notifies start of scan in the device
 251  * ( SCAN_START_NOTIFICATION = 0x82 )
 252  * @tsf_low: TSF timer (lower half) in usecs
 253  * @tsf_high: TSF timer (higher half) in usecs
 254  * @beacon_timer: structured as follows:
 255  *      bits 0:19 - beacon interval in usecs
 256  *      bits 20:23 - reserved (0)
 257  *      bits 24:31 - number of beacons
 258  * @channel: which channel is scanned
 259  * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
 260  * @status: one of *_OWNER_STATUS
 261  */
 262 struct iwl_scan_start_notif {
 263         __le32 tsf_low;
 264         __le32 tsf_high;
 265         __le32 beacon_timer;
 266         u8 channel;
 267         u8 band;
 268         u8 reserved[2];
 269         __le32 status;
 270 } __packed; /* SCAN_START_NTF_API_S_VER_1 */
 271
 272 /* scan results probe_status first bit indicates success */
 273 #define SCAN_PROBE_STATUS_OK            0
 274 #define SCAN_PROBE_STATUS_TX_FAILED     BIT(0)
 275 /* error statuses combined with TX_FAILED */
 276 #define SCAN_PROBE_STATUS_FAIL_TTL      BIT(1)
 277 #define SCAN_PROBE_STATUS_FAIL_BT       BIT(2)
 278
 279 /* How many statistics are gathered for each channel */
 280 #define SCAN_RESULTS_STATISTICS 1
 281
 282 /**
 283  * enum iwl_scan_complete_status - status codes for scan complete notifications
 284  * @SCAN_COMP_STATUS_OK:  scan completed successfully
 285  * @SCAN_COMP_STATUS_ABORT: scan was aborted by user
 286  * @SCAN_COMP_STATUS_ERR_SLEEP: sending null sleep packet failed
 287  * @SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT: timeout before channel is ready
 288  * @SCAN_COMP_STATUS_ERR_PROBE: sending probe request failed
 289  * @SCAN_COMP_STATUS_ERR_WAKEUP: sending null wakeup packet failed
 290  * @SCAN_COMP_STATUS_ERR_ANTENNAS: invalid antennas chosen at scan command
 291  * @SCAN_COMP_STATUS_ERR_INTERNAL: internal error caused scan abort
 292  * @SCAN_COMP_STATUS_ERR_COEX: medium was lost ot WiMax
 293  * @SCAN_COMP_STATUS_P2P_ACTION_OK: P2P public action frame TX was successful
 294  *      (not an error!)
 295  * @SCAN_COMP_STATUS_ITERATION_END: indicates end of one repeatition the driver
 296  *      asked for
 297  * @SCAN_COMP_STATUS_ERR_ALLOC_TE: scan could not allocate time events
 298 */
 299 enum iwl_scan_complete_status {
 300         SCAN_COMP_STATUS_OK = 0x1,
 301         SCAN_COMP_STATUS_ABORT = 0x2,
 302         SCAN_COMP_STATUS_ERR_SLEEP = 0x3,
 303         SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT = 0x4,
 304         SCAN_COMP_STATUS_ERR_PROBE = 0x5,
 305         SCAN_COMP_STATUS_ERR_WAKEUP = 0x6,
 306         SCAN_COMP_STATUS_ERR_ANTENNAS = 0x7,
 307         SCAN_COMP_STATUS_ERR_INTERNAL = 0x8,
 308         SCAN_COMP_STATUS_ERR_COEX = 0x9,
 309         SCAN_COMP_STATUS_P2P_ACTION_OK = 0xA,
 310         SCAN_COMP_STATUS_ITERATION_END = 0x0B,
 311         SCAN_COMP_STATUS_ERR_ALLOC_TE = 0x0C,
 312 };
 313
 314 /**
 315  * struct iwl_scan_results_notif - scan results for one channel
 316  * ( SCAN_RESULTS_NOTIFICATION = 0x83 )
 317  * @channel: which channel the results are from
 318  * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
 319  * @probe_status: SCAN_PROBE_STATUS_*, indicates success of probe request
 320  * @num_probe_not_sent: # of request that weren't sent due to not enough time
 321  * @duration: duration spent in channel, in usecs
 322  * @statistics: statistics gathered for this channel
 323  */
 324 struct iwl_scan_results_notif {
 325         u8 channel;
 326         u8 band;
 327         u8 probe_status;
 328         u8 num_probe_not_sent;
 329         __le32 duration;
 330         __le32 statistics[SCAN_RESULTS_STATISTICS];
 331 } __packed; /* SCAN_RESULT_NTF_API_S_VER_2 */
 332
 333 /**
 334  * struct iwl_scan_complete_notif - notifies end of scanning (all channels)
 335  * ( SCAN_COMPLETE_NOTIFICATION = 0x84 )
 336  * @scanned_channels: number of channels scanned (and number of valid results)
 337  * @status: one of SCAN_COMP_STATUS_*
 338  * @bt_status: BT on/off status
 339  * @last_channel: last channel that was scanned
 340  * @tsf_low: TSF timer (lower half) in usecs
 341  * @tsf_high: TSF timer (higher half) in usecs
 342  * @results: all scan results, only "scanned_channels" of them are valid
 343  */
 344 struct iwl_scan_complete_notif {
 345         u8 scanned_channels;
 346         u8 status;
 347         u8 bt_status;
 348         u8 last_channel;
 349         __le32 tsf_low;
 350         __le32 tsf_high;
 351         struct iwl_scan_results_notif results[MAX_NUM_SCAN_CHANNELS];
 352 } __packed; /* SCAN_COMPLETE_NTF_API_S_VER_2 */
 353
 354 /* scan offload */
 355 #define IWL_MAX_SCAN_CHANNELS           40
 356 #define IWL_SCAN_MAX_BLACKLIST_LEN      64
 357 #define IWL_SCAN_MAX_PROFILES           11
 358 #define SCAN_OFFLOAD_PROBE_REQ_SIZE     512
 359
 360 /* Default watchdog (in MS) for scheduled scan iteration */
 361 #define IWL_SCHED_SCAN_WATCHDOG cpu_to_le16(15000)
 362
 363 #define IWL_GOOD_CRC_TH_DEFAULT cpu_to_le16(1)
 364 #define CAN_ABORT_STATUS 1
 365
 366 #define IWL_FULL_SCAN_MULTIPLIER 5
 367 #define IWL_FAST_SCHED_SCAN_ITERATIONS 3
 368
 369 /**
 370  * struct iwl_scan_offload_cmd - SCAN_REQUEST_FIXED_PART_API_S_VER_6
 371  * @scan_flags:         see enum iwl_scan_flags
 372  * @channel_count:      channels in channel list
 373  * @quiet_time:         dwell time, in milisiconds, on quiet channel
 374  * @quiet_plcp_th:      quiet channel num of packets threshold
 375  * @good_CRC_th:        passive to active promotion threshold
 376  * @rx_chain:           RXON rx chain.
 377  * @max_out_time:       max uSec to be out of assoceated channel
 378  * @suspend_time:       pause scan this long when returning to service channel
 379  * @flags:              RXON flags
 380  * @filter_flags:       RXONfilter
 381  * @tx_cmd:             tx command for active scan; for 2GHz and for 5GHz.
 382  * @direct_scan:        list of SSIDs for directed active scan
 383  * @scan_type:          see enum iwl_scan_type.
 384  * @rep_count:          repetition count for each scheduled scan iteration.
 385  */
 386 struct iwl_scan_offload_cmd {
 387         __le16 len;
 388         u8 scan_flags;
 389         u8 channel_count;
 390         __le16 quiet_time;
 391         __le16 quiet_plcp_th;
 392         __le16 good_CRC_th;
 393         __le16 rx_chain;
 394         __le32 max_out_time;
 395         __le32 suspend_time;
 396         /* RX_ON_FLAGS_API_S_VER_1 */
 397         __le32 flags;
 398         __le32 filter_flags;
 399         struct iwl_tx_cmd tx_cmd[2];
 400         /* SCAN_DIRECT_SSID_IE_API_S_VER_1 */
 401         struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
 402         __le32 scan_type;
 403         __le32 rep_count;
 404 } __packed;
 405
 406 enum iwl_scan_offload_channel_flags {
 407         IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE         = BIT(0),
 408         IWL_SCAN_OFFLOAD_CHANNEL_NARROW         = BIT(22),
 409         IWL_SCAN_OFFLOAD_CHANNEL_FULL           = BIT(24),
 410         IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL        = BIT(25),
 411 };
 412
 413 /**
 414  * iwl_scan_channel_cfg - SCAN_CHANNEL_CFG_S
 415  * @type:               bitmap - see enum iwl_scan_offload_channel_flags.
 416  *                      0:      passive (0) or active (1) scan.
 417  *                      1-20:   directed scan to i'th ssid.
 418  *                      22:     channel width configuation - 1 for narrow.
 419  *                      24:     full scan.
 420  *                      25:     partial scan.
 421  * @channel_number:     channel number 1-13 etc.
 422  * @iter_count:         repetition count for the channel.
 423  * @iter_interval:      interval between two innteration on one channel.
 424  * @dwell_time: entry 0 - active scan, entry 1 - passive scan.
 425  */
 426 struct iwl_scan_channel_cfg {
 427         __le32 type[IWL_MAX_SCAN_CHANNELS];
 428         __le16 channel_number[IWL_MAX_SCAN_CHANNELS];
 429         __le16 iter_count[IWL_MAX_SCAN_CHANNELS];
 430         __le32 iter_interval[IWL_MAX_SCAN_CHANNELS];
 431         u8 dwell_time[IWL_MAX_SCAN_CHANNELS][2];
 432 } __packed;
 433
 434 /**
 435  * iwl_scan_offload_cfg - SCAN_OFFLOAD_CONFIG_API_S
 436  * @scan_cmd:           scan command fixed part
 437  * @channel_cfg:        scan channel configuration
 438  * @data:               probe request frames (one per band)
 439  */
 440 struct iwl_scan_offload_cfg {
 441         struct iwl_scan_offload_cmd scan_cmd;
 442         struct iwl_scan_channel_cfg channel_cfg;
 443         u8 data[0];
 444 } __packed;
 445
 446 /**
 447  * iwl_scan_offload_blacklist - SCAN_OFFLOAD_BLACKLIST_S
 448  * @ssid:               MAC address to filter out
 449  * @reported_rssi:      AP rssi reported to the host
 450  */
 451 struct iwl_scan_offload_blacklist {
 452         u8 ssid[ETH_ALEN];
 453         u8 reported_rssi;
 454         u8 reserved;
 455 } __packed;
 456
 457 enum iwl_scan_offload_network_type {
 458         IWL_NETWORK_TYPE_BSS    = 1,
 459         IWL_NETWORK_TYPE_IBSS   = 2,
 460         IWL_NETWORK_TYPE_ANY    = 3,
 461 };
 462
 463 enum iwl_scan_offload_band_selection {
 464         IWL_SCAN_OFFLOAD_SELECT_2_4     = 0x4,
 465         IWL_SCAN_OFFLOAD_SELECT_5_2     = 0x8,
 466         IWL_SCAN_OFFLOAD_SELECT_ANY     = 0xc,
 467 };
 468
 469 /**
 470  * iwl_scan_offload_profile - SCAN_OFFLOAD_PROFILE_S
 471  * @ssid_index:         index to ssid list in fixed part
 472  * @unicast_cipher:     encryption olgorithm to match - bitmap
 473  * @aut_alg:            authentication olgorithm to match - bitmap
 474  * @network_type:       enum iwl_scan_offload_network_type
 475  * @band_selection:     enum iwl_scan_offload_band_selection
 476  */
 477 struct iwl_scan_offload_profile {
 478         u8 ssid_index;
 479         u8 unicast_cipher;
 480         u8 auth_alg;
 481         u8 network_type;
 482         u8 band_selection;
 483         u8 reserved[3];
 484 } __packed;
 485
 486 /**
 487  * iwl_scan_offload_profile_cfg - SCAN_OFFLOAD_PROFILES_CFG_API_S_VER_1
 488  * @blaclist:           AP list to filter off from scan results
 489  * @profiles:           profiles to search for match
 490  * @blacklist_len:      length of blacklist
 491  * @num_profiles:       num of profiles in the list
 492  */
 493 struct iwl_scan_offload_profile_cfg {
 494         struct iwl_scan_offload_blacklist blacklist[IWL_SCAN_MAX_BLACKLIST_LEN];
 495         struct iwl_scan_offload_profile profiles[IWL_SCAN_MAX_PROFILES];
 496         u8 blacklist_len;
 497         u8 num_profiles;
 498         u8 reserved[2];
 499 } __packed;
 500
 501 /**
 502  * iwl_scan_offload_schedule - schedule of scan offload
 503  * @delay:              delay between iterations, in seconds.
 504  * @iterations:         num of scan iterations
 505  * @full_scan_mul:      number of partial scans before each full scan
 506  */
 507 struct iwl_scan_offload_schedule {
 508         u16 delay;
 509         u8 iterations;
 510         u8 full_scan_mul;
 511 } __packed;
 512
 513 /*
 514  * iwl_scan_offload_flags
 515  *
 516  * IWL_SCAN_OFFLOAD_FLAG_FILTER_SSID: filter mode - upload every beacon or match
 517  *      ssid list.
 518  * IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL: add cached channels to partial scan.
 519  * IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN: use energy based scan before partial scan
 520  *      on A band.
 521  */
 522 enum iwl_scan_offload_flags {
 523         IWL_SCAN_OFFLOAD_FLAG_FILTER_SSID       = BIT(0),
 524         IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL    = BIT(2),
 525         IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN       = BIT(3),
 526 };
 527
 528 /**
 529  * iwl_scan_offload_req - scan offload request command
 530  * @flags:              bitmap - enum iwl_scan_offload_flags.
 531  * @watchdog:           maximum scan duration in TU.
 532  * @delay:              delay in seconds before first iteration.
 533  * @schedule_line:      scan offload schedule, for fast and regular scan.
 534  */
 535 struct iwl_scan_offload_req {
 536         __le16 flags;
 537         __le16 watchdog;
 538         __le16 delay;
 539         __le16 reserved;
 540         struct iwl_scan_offload_schedule schedule_line[2];
 541 } __packed;
 542
 543 enum iwl_scan_offload_compleate_status {
 544         IWL_SCAN_OFFLOAD_COMPLETED      = 1,
 545         IWL_SCAN_OFFLOAD_ABORTED        = 2,
 546 };
 547
 548 /**
 549  * iwl_scan_offload_complete - SCAN_OFFLOAD_COMPLETE_NTF_API_S_VER_1
 550  * @last_schedule_line:         last schedule line executed (fast or regular)
 551  * @last_schedule_iteration:    last scan iteration executed before scan abort
 552  * @status:                     enum iwl_scan_offload_compleate_status
 553  */
 554 struct iwl_scan_offload_complete {
 555         u8 last_schedule_line;
 556         u8 last_schedule_iteration;
 557         u8 status;
 558         u8 reserved;
 559 } __packed;
 560
 561 #endif