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Johannes Berg8ca151b2013-01-24 14:25:36 +01001/******************************************************************************
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Johannes Berg8ca151b2013-01-24 14:25:36 +010026 *
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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 */
Johannes Berg8ca151b2013-01-24 14:25:36 +010072#define SCAN_CHANNEL_TYPE_ACTIVE BIT(0)
73#define SCAN_CHANNEL_NARROW_BAND BIT(22)
74
75/* Max number of IEs for direct SSID scans in a command */
76#define PROBE_OPTION_MAX 20
77
78/**
79 * struct iwl_scan_channel - entry in REPLY_SCAN_CMD channel table
80 * @channel: band is selected by iwl_scan_cmd "flags" field
81 * @tx_gain: gain for analog radio
82 * @dsp_atten: gain for DSP
83 * @active_dwell: dwell time for active scan in TU, typically 5-50
84 * @passive_dwell: dwell time for passive scan in TU, typically 20-500
85 * @type: type is broken down to these bits:
86 * bit 0: 0 = passive, 1 = active
87 * bits 1-20: SSID direct bit map. If any of these bits is set then
88 * the corresponding SSID IE is transmitted in probe request
89 * (bit i adds IE in position i to the probe request)
90 * bit 22: channel width, 0 = regular, 1 = TGj narrow channel
91 *
92 * @iteration_count:
93 * @iteration_interval:
94 * This struct is used once for each channel in the scan list.
95 * Each channel can independently select:
96 * 1) SSID for directed active scans
97 * 2) Txpower setting (for rate specified within Tx command)
98 * 3) How long to stay on-channel (behavior may be modified by quiet_time,
99 * quiet_plcp_th, good_CRC_th)
100 *
101 * To avoid uCode errors, make sure the following are true (see comments
102 * under struct iwl_scan_cmd about max_out_time and quiet_time):
103 * 1) If using passive_dwell (i.e. passive_dwell != 0):
104 * active_dwell <= passive_dwell (< max_out_time if max_out_time != 0)
105 * 2) quiet_time <= active_dwell
106 * 3) If restricting off-channel time (i.e. max_out_time !=0):
107 * passive_dwell < max_out_time
108 * active_dwell < max_out_time
109 */
110struct iwl_scan_channel {
111 __le32 type;
112 __le16 channel;
113 __le16 iteration_count;
114 __le32 iteration_interval;
115 __le16 active_dwell;
116 __le16 passive_dwell;
117} __packed; /* SCAN_CHANNEL_CONTROL_API_S_VER_1 */
118
119/**
120 * struct iwl_ssid_ie - directed scan network information element
121 *
122 * Up to 20 of these may appear in REPLY_SCAN_CMD,
123 * selected by "type" bit field in struct iwl_scan_channel;
124 * each channel may select different ssids from among the 20 entries.
125 * SSID IEs get transmitted in reverse order of entry.
126 */
127struct iwl_ssid_ie {
128 u8 id;
129 u8 len;
130 u8 ssid[IEEE80211_MAX_SSID_LEN];
131} __packed; /* SCAN_DIRECT_SSID_IE_API_S_VER_1 */
132
133/**
134 * iwl_scan_flags - masks for scan command flags
135 *@SCAN_FLAGS_PERIODIC_SCAN:
136 *@SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX:
137 *@SCAN_FLAGS_DELAYED_SCAN_LOWBAND:
138 *@SCAN_FLAGS_DELAYED_SCAN_HIGHBAND:
139 *@SCAN_FLAGS_FRAGMENTED_SCAN:
David Spinadel26e05cc2013-07-08 13:12:29 +0300140 *@SCAN_FLAGS_PASSIVE2ACTIVE: use active scan on channels that was active
141 * in the past hour, even if they are marked as passive.
Johannes Berg8ca151b2013-01-24 14:25:36 +0100142 */
143enum iwl_scan_flags {
144 SCAN_FLAGS_PERIODIC_SCAN = BIT(0),
145 SCAN_FLAGS_P2P_PUBLIC_ACTION_FRAME_TX = BIT(1),
146 SCAN_FLAGS_DELAYED_SCAN_LOWBAND = BIT(2),
147 SCAN_FLAGS_DELAYED_SCAN_HIGHBAND = BIT(3),
148 SCAN_FLAGS_FRAGMENTED_SCAN = BIT(4),
David Spinadel26e05cc2013-07-08 13:12:29 +0300149 SCAN_FLAGS_PASSIVE2ACTIVE = BIT(5),
Johannes Berg8ca151b2013-01-24 14:25:36 +0100150};
151
152/**
153 * enum iwl_scan_type - Scan types for scan command
154 * @SCAN_TYPE_FORCED:
155 * @SCAN_TYPE_BACKGROUND:
156 * @SCAN_TYPE_OS:
157 * @SCAN_TYPE_ROAMING:
158 * @SCAN_TYPE_ACTION:
159 * @SCAN_TYPE_DISCOVERY:
160 * @SCAN_TYPE_DISCOVERY_FORCED:
161 */
162enum iwl_scan_type {
163 SCAN_TYPE_FORCED = 0,
164 SCAN_TYPE_BACKGROUND = 1,
165 SCAN_TYPE_OS = 2,
166 SCAN_TYPE_ROAMING = 3,
167 SCAN_TYPE_ACTION = 4,
168 SCAN_TYPE_DISCOVERY = 5,
169 SCAN_TYPE_DISCOVERY_FORCED = 6,
170}; /* SCAN_ACTIVITY_TYPE_E_VER_1 */
171
172/* Maximal number of channels to scan */
173#define MAX_NUM_SCAN_CHANNELS 0x24
174
175/**
176 * struct iwl_scan_cmd - scan request command
177 * ( SCAN_REQUEST_CMD = 0x80 )
178 * @len: command length in bytes
179 * @scan_flags: scan flags from SCAN_FLAGS_*
180 * @channel_count: num of channels in channel list (1 - MAX_NUM_SCAN_CHANNELS)
181 * @quiet_time: in msecs, dwell this time for active scan on quiet channels
182 * @quiet_plcp_th: quiet PLCP threshold (channel is quiet if less than
183 * this number of packets were received (typically 1)
David Spinadel26e05cc2013-07-08 13:12:29 +0300184 * @passive2active: is auto switching from passive to active during scan allowed
Johannes Berg8ca151b2013-01-24 14:25:36 +0100185 * @rxchain_sel_flags: RXON_RX_CHAIN_*
186 * @max_out_time: in usecs, max out of serving channel time
187 * @suspend_time: how long to pause scan when returning to service channel:
188 * bits 0-19: beacon interal in usecs (suspend before executing)
189 * bits 20-23: reserved
190 * bits 24-31: number of beacons (suspend between channels)
191 * @rxon_flags: RXON_FLG_*
192 * @filter_flags: RXON_FILTER_*
193 * @tx_cmd: for active scans (zero for passive), w/o payload,
194 * no RS so specify TX rate
195 * @direct_scan: direct scan SSIDs
196 * @type: one of SCAN_TYPE_*
197 * @repeats: how many time to repeat the scan
198 */
199struct iwl_scan_cmd {
200 __le16 len;
201 u8 scan_flags;
202 u8 channel_count;
203 __le16 quiet_time;
204 __le16 quiet_plcp_th;
205 __le16 passive2active;
206 __le16 rxchain_sel_flags;
207 __le32 max_out_time;
208 __le32 suspend_time;
209 /* RX_ON_FLAGS_API_S_VER_1 */
210 __le32 rxon_flags;
211 __le32 filter_flags;
212 struct iwl_tx_cmd tx_cmd;
213 struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
214 __le32 type;
215 __le32 repeats;
216
217 /*
218 * Probe request frame, followed by channel list.
219 *
220 * Size of probe request frame is specified by byte count in tx_cmd.
221 * Channel list follows immediately after probe request frame.
222 * Number of channels in list is specified by channel_count.
223 * Each channel in list is of type:
224 *
225 * struct iwl_scan_channel channels[0];
226 *
227 * NOTE: Only one band of channels can be scanned per pass. You
228 * must not mix 2.4GHz channels and 5.2GHz channels, and you must wait
229 * for one scan to complete (i.e. receive SCAN_COMPLETE_NOTIFICATION)
230 * before requesting another scan.
231 */
232 u8 data[0];
233} __packed; /* SCAN_REQUEST_FIXED_PART_API_S_VER_5 */
234
235/* Response to scan request contains only status with one of these values */
236#define SCAN_RESPONSE_OK 0x1
237#define SCAN_RESPONSE_ERROR 0x2
238
239/*
240 * SCAN_ABORT_CMD = 0x81
241 * When scan abort is requested, the command has no fields except the common
242 * header. The response contains only a status with one of these values.
243 */
244#define SCAN_ABORT_POSSIBLE 0x1
245#define SCAN_ABORT_IGNORED 0x2 /* no pending scans */
246
247/* TODO: complete documentation */
248#define SCAN_OWNER_STATUS 0x1
249#define MEASURE_OWNER_STATUS 0x2
250
251/**
252 * struct iwl_scan_start_notif - notifies start of scan in the device
253 * ( SCAN_START_NOTIFICATION = 0x82 )
254 * @tsf_low: TSF timer (lower half) in usecs
255 * @tsf_high: TSF timer (higher half) in usecs
256 * @beacon_timer: structured as follows:
257 * bits 0:19 - beacon interval in usecs
258 * bits 20:23 - reserved (0)
259 * bits 24:31 - number of beacons
260 * @channel: which channel is scanned
261 * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
262 * @status: one of *_OWNER_STATUS
263 */
264struct iwl_scan_start_notif {
265 __le32 tsf_low;
266 __le32 tsf_high;
267 __le32 beacon_timer;
268 u8 channel;
269 u8 band;
270 u8 reserved[2];
271 __le32 status;
272} __packed; /* SCAN_START_NTF_API_S_VER_1 */
273
274/* scan results probe_status first bit indicates success */
275#define SCAN_PROBE_STATUS_OK 0
276#define SCAN_PROBE_STATUS_TX_FAILED BIT(0)
277/* error statuses combined with TX_FAILED */
278#define SCAN_PROBE_STATUS_FAIL_TTL BIT(1)
279#define SCAN_PROBE_STATUS_FAIL_BT BIT(2)
280
281/* How many statistics are gathered for each channel */
282#define SCAN_RESULTS_STATISTICS 1
283
284/**
285 * enum iwl_scan_complete_status - status codes for scan complete notifications
286 * @SCAN_COMP_STATUS_OK: scan completed successfully
287 * @SCAN_COMP_STATUS_ABORT: scan was aborted by user
288 * @SCAN_COMP_STATUS_ERR_SLEEP: sending null sleep packet failed
289 * @SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT: timeout before channel is ready
290 * @SCAN_COMP_STATUS_ERR_PROBE: sending probe request failed
291 * @SCAN_COMP_STATUS_ERR_WAKEUP: sending null wakeup packet failed
292 * @SCAN_COMP_STATUS_ERR_ANTENNAS: invalid antennas chosen at scan command
293 * @SCAN_COMP_STATUS_ERR_INTERNAL: internal error caused scan abort
294 * @SCAN_COMP_STATUS_ERR_COEX: medium was lost ot WiMax
295 * @SCAN_COMP_STATUS_P2P_ACTION_OK: P2P public action frame TX was successful
296 * (not an error!)
297 * @SCAN_COMP_STATUS_ITERATION_END: indicates end of one repeatition the driver
298 * asked for
299 * @SCAN_COMP_STATUS_ERR_ALLOC_TE: scan could not allocate time events
300*/
301enum iwl_scan_complete_status {
302 SCAN_COMP_STATUS_OK = 0x1,
303 SCAN_COMP_STATUS_ABORT = 0x2,
304 SCAN_COMP_STATUS_ERR_SLEEP = 0x3,
305 SCAN_COMP_STATUS_ERR_CHAN_TIMEOUT = 0x4,
306 SCAN_COMP_STATUS_ERR_PROBE = 0x5,
307 SCAN_COMP_STATUS_ERR_WAKEUP = 0x6,
308 SCAN_COMP_STATUS_ERR_ANTENNAS = 0x7,
309 SCAN_COMP_STATUS_ERR_INTERNAL = 0x8,
310 SCAN_COMP_STATUS_ERR_COEX = 0x9,
311 SCAN_COMP_STATUS_P2P_ACTION_OK = 0xA,
312 SCAN_COMP_STATUS_ITERATION_END = 0x0B,
313 SCAN_COMP_STATUS_ERR_ALLOC_TE = 0x0C,
314};
315
316/**
317 * struct iwl_scan_results_notif - scan results for one channel
318 * ( SCAN_RESULTS_NOTIFICATION = 0x83 )
319 * @channel: which channel the results are from
320 * @band: 0 for 5.2 GHz, 1 for 2.4 GHz
321 * @probe_status: SCAN_PROBE_STATUS_*, indicates success of probe request
322 * @num_probe_not_sent: # of request that weren't sent due to not enough time
323 * @duration: duration spent in channel, in usecs
324 * @statistics: statistics gathered for this channel
325 */
326struct iwl_scan_results_notif {
327 u8 channel;
328 u8 band;
329 u8 probe_status;
330 u8 num_probe_not_sent;
331 __le32 duration;
332 __le32 statistics[SCAN_RESULTS_STATISTICS];
333} __packed; /* SCAN_RESULT_NTF_API_S_VER_2 */
334
335/**
336 * struct iwl_scan_complete_notif - notifies end of scanning (all channels)
337 * ( SCAN_COMPLETE_NOTIFICATION = 0x84 )
338 * @scanned_channels: number of channels scanned (and number of valid results)
339 * @status: one of SCAN_COMP_STATUS_*
340 * @bt_status: BT on/off status
341 * @last_channel: last channel that was scanned
342 * @tsf_low: TSF timer (lower half) in usecs
343 * @tsf_high: TSF timer (higher half) in usecs
344 * @results: all scan results, only "scanned_channels" of them are valid
345 */
346struct iwl_scan_complete_notif {
347 u8 scanned_channels;
348 u8 status;
349 u8 bt_status;
350 u8 last_channel;
351 __le32 tsf_low;
352 __le32 tsf_high;
353 struct iwl_scan_results_notif results[MAX_NUM_SCAN_CHANNELS];
354} __packed; /* SCAN_COMPLETE_NTF_API_S_VER_2 */
355
356/* scan offload */
357#define IWL_MAX_SCAN_CHANNELS 40
358#define IWL_SCAN_MAX_BLACKLIST_LEN 64
359#define IWL_SCAN_MAX_PROFILES 11
360#define SCAN_OFFLOAD_PROBE_REQ_SIZE 512
361
362/* Default watchdog (in MS) for scheduled scan iteration */
363#define IWL_SCHED_SCAN_WATCHDOG cpu_to_le16(15000)
364
365#define IWL_GOOD_CRC_TH_DEFAULT cpu_to_le16(1)
366#define CAN_ABORT_STATUS 1
367
368#define IWL_FULL_SCAN_MULTIPLIER 5
369#define IWL_FAST_SCHED_SCAN_ITERATIONS 3
370
371/**
372 * struct iwl_scan_offload_cmd - SCAN_REQUEST_FIXED_PART_API_S_VER_6
373 * @scan_flags: see enum iwl_scan_flags
374 * @channel_count: channels in channel list
375 * @quiet_time: dwell time, in milisiconds, on quiet channel
376 * @quiet_plcp_th: quiet channel num of packets threshold
377 * @good_CRC_th: passive to active promotion threshold
378 * @rx_chain: RXON rx chain.
379 * @max_out_time: max uSec to be out of assoceated channel
380 * @suspend_time: pause scan this long when returning to service channel
381 * @flags: RXON flags
382 * @filter_flags: RXONfilter
383 * @tx_cmd: tx command for active scan; for 2GHz and for 5GHz.
384 * @direct_scan: list of SSIDs for directed active scan
385 * @scan_type: see enum iwl_scan_type.
386 * @rep_count: repetition count for each scheduled scan iteration.
387 */
388struct iwl_scan_offload_cmd {
389 __le16 len;
390 u8 scan_flags;
391 u8 channel_count;
392 __le16 quiet_time;
393 __le16 quiet_plcp_th;
394 __le16 good_CRC_th;
395 __le16 rx_chain;
396 __le32 max_out_time;
397 __le32 suspend_time;
398 /* RX_ON_FLAGS_API_S_VER_1 */
399 __le32 flags;
400 __le32 filter_flags;
401 struct iwl_tx_cmd tx_cmd[2];
402 /* SCAN_DIRECT_SSID_IE_API_S_VER_1 */
403 struct iwl_ssid_ie direct_scan[PROBE_OPTION_MAX];
404 __le32 scan_type;
405 __le32 rep_count;
406} __packed;
407
408enum iwl_scan_offload_channel_flags {
409 IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE = BIT(0),
410 IWL_SCAN_OFFLOAD_CHANNEL_NARROW = BIT(22),
411 IWL_SCAN_OFFLOAD_CHANNEL_FULL = BIT(24),
412 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL = BIT(25),
413};
414
415/**
416 * iwl_scan_channel_cfg - SCAN_CHANNEL_CFG_S
417 * @type: bitmap - see enum iwl_scan_offload_channel_flags.
418 * 0: passive (0) or active (1) scan.
419 * 1-20: directed scan to i'th ssid.
420 * 22: channel width configuation - 1 for narrow.
421 * 24: full scan.
422 * 25: partial scan.
423 * @channel_number: channel number 1-13 etc.
424 * @iter_count: repetition count for the channel.
425 * @iter_interval: interval between two innteration on one channel.
426 * @dwell_time: entry 0 - active scan, entry 1 - passive scan.
427 */
428struct iwl_scan_channel_cfg {
429 __le32 type[IWL_MAX_SCAN_CHANNELS];
430 __le16 channel_number[IWL_MAX_SCAN_CHANNELS];
431 __le16 iter_count[IWL_MAX_SCAN_CHANNELS];
432 __le32 iter_interval[IWL_MAX_SCAN_CHANNELS];
433 u8 dwell_time[IWL_MAX_SCAN_CHANNELS][2];
434} __packed;
435
436/**
437 * iwl_scan_offload_cfg - SCAN_OFFLOAD_CONFIG_API_S
438 * @scan_cmd: scan command fixed part
439 * @channel_cfg: scan channel configuration
440 * @data: probe request frames (one per band)
441 */
442struct iwl_scan_offload_cfg {
443 struct iwl_scan_offload_cmd scan_cmd;
444 struct iwl_scan_channel_cfg channel_cfg;
445 u8 data[0];
446} __packed;
447
448/**
449 * iwl_scan_offload_blacklist - SCAN_OFFLOAD_BLACKLIST_S
450 * @ssid: MAC address to filter out
451 * @reported_rssi: AP rssi reported to the host
452 */
453struct iwl_scan_offload_blacklist {
454 u8 ssid[ETH_ALEN];
455 u8 reported_rssi;
456 u8 reserved;
457} __packed;
458
459enum iwl_scan_offload_network_type {
460 IWL_NETWORK_TYPE_BSS = 1,
461 IWL_NETWORK_TYPE_IBSS = 2,
462 IWL_NETWORK_TYPE_ANY = 3,
463};
464
465enum iwl_scan_offload_band_selection {
466 IWL_SCAN_OFFLOAD_SELECT_2_4 = 0x4,
467 IWL_SCAN_OFFLOAD_SELECT_5_2 = 0x8,
468 IWL_SCAN_OFFLOAD_SELECT_ANY = 0xc,
469};
470
471/**
472 * iwl_scan_offload_profile - SCAN_OFFLOAD_PROFILE_S
473 * @ssid_index: index to ssid list in fixed part
474 * @unicast_cipher: encryption olgorithm to match - bitmap
475 * @aut_alg: authentication olgorithm to match - bitmap
476 * @network_type: enum iwl_scan_offload_network_type
477 * @band_selection: enum iwl_scan_offload_band_selection
478 */
479struct iwl_scan_offload_profile {
480 u8 ssid_index;
481 u8 unicast_cipher;
482 u8 auth_alg;
483 u8 network_type;
484 u8 band_selection;
485 u8 reserved[3];
486} __packed;
487
488/**
489 * iwl_scan_offload_profile_cfg - SCAN_OFFLOAD_PROFILES_CFG_API_S_VER_1
490 * @blaclist: AP list to filter off from scan results
491 * @profiles: profiles to search for match
492 * @blacklist_len: length of blacklist
493 * @num_profiles: num of profiles in the list
494 */
495struct iwl_scan_offload_profile_cfg {
496 struct iwl_scan_offload_blacklist blacklist[IWL_SCAN_MAX_BLACKLIST_LEN];
497 struct iwl_scan_offload_profile profiles[IWL_SCAN_MAX_PROFILES];
498 u8 blacklist_len;
499 u8 num_profiles;
500 u8 reserved[2];
501} __packed;
502
503/**
504 * iwl_scan_offload_schedule - schedule of scan offload
505 * @delay: delay between iterations, in seconds.
506 * @iterations: num of scan iterations
507 * @full_scan_mul: number of partial scans before each full scan
508 */
509struct iwl_scan_offload_schedule {
510 u16 delay;
511 u8 iterations;
512 u8 full_scan_mul;
513} __packed;
514
515/*
516 * iwl_scan_offload_flags
517 *
518 * IWL_SCAN_OFFLOAD_FLAG_FILTER_SSID: filter mode - upload every beacon or match
519 * ssid list.
520 * IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL: add cached channels to partial scan.
521 * IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN: use energy based scan before partial scan
522 * on A band.
523 */
524enum iwl_scan_offload_flags {
525 IWL_SCAN_OFFLOAD_FLAG_FILTER_SSID = BIT(0),
526 IWL_SCAN_OFFLOAD_FLAG_CACHED_CHANNEL = BIT(2),
527 IWL_SCAN_OFFLOAD_FLAG_ENERGY_SCAN = BIT(3),
528};
529
530/**
531 * iwl_scan_offload_req - scan offload request command
532 * @flags: bitmap - enum iwl_scan_offload_flags.
533 * @watchdog: maximum scan duration in TU.
534 * @delay: delay in seconds before first iteration.
535 * @schedule_line: scan offload schedule, for fast and regular scan.
536 */
537struct iwl_scan_offload_req {
538 __le16 flags;
539 __le16 watchdog;
540 __le16 delay;
541 __le16 reserved;
542 struct iwl_scan_offload_schedule schedule_line[2];
543} __packed;
544
545enum iwl_scan_offload_compleate_status {
546 IWL_SCAN_OFFLOAD_COMPLETED = 1,
547 IWL_SCAN_OFFLOAD_ABORTED = 2,
548};
549
550/**
551 * iwl_scan_offload_complete - SCAN_OFFLOAD_COMPLETE_NTF_API_S_VER_1
552 * @last_schedule_line: last schedule line executed (fast or regular)
553 * @last_schedule_iteration: last scan iteration executed before scan abort
554 * @status: enum iwl_scan_offload_compleate_status
555 */
556struct iwl_scan_offload_complete {
557 u8 last_schedule_line;
558 u8 last_schedule_iteration;
559 u8 status;
560 u8 reserved;
561} __packed;
562
563#endif