| /* |
| * mac80211 <-> driver interface |
| * |
| * Copyright 2002-2005, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #ifndef MAC80211_H |
| #define MAC80211_H |
| |
| #include <linux/kernel.h> |
| #include <linux/if_ether.h> |
| #include <linux/skbuff.h> |
| #include <linux/wireless.h> |
| #include <linux/device.h> |
| #include <linux/ieee80211.h> |
| #include <net/cfg80211.h> |
| |
| /** |
| * DOC: Introduction |
| * |
| * mac80211 is the Linux stack for 802.11 hardware that implements |
| * only partial functionality in hard- or firmware. This document |
| * defines the interface between mac80211 and low-level hardware |
| * drivers. |
| */ |
| |
| /** |
| * DOC: Calling mac80211 from interrupts |
| * |
| * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be |
| * called in hardware interrupt context. The low-level driver must not call any |
| * other functions in hardware interrupt context. If there is a need for such |
| * call, the low-level driver should first ACK the interrupt and perform the |
| * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even |
| * tasklet function. |
| * |
| * NOTE: If the driver opts to use the _irqsafe() functions, it may not also |
| * use the non-IRQ-safe functions! |
| */ |
| |
| /** |
| * DOC: Warning |
| * |
| * If you're reading this document and not the header file itself, it will |
| * be incomplete because not all documentation has been converted yet. |
| */ |
| |
| /** |
| * DOC: Frame format |
| * |
| * As a general rule, when frames are passed between mac80211 and the driver, |
| * they start with the IEEE 802.11 header and include the same octets that are |
| * sent over the air except for the FCS which should be calculated by the |
| * hardware. |
| * |
| * There are, however, various exceptions to this rule for advanced features: |
| * |
| * The first exception is for hardware encryption and decryption offload |
| * where the IV/ICV may or may not be generated in hardware. |
| * |
| * Secondly, when the hardware handles fragmentation, the frame handed to |
| * the driver from mac80211 is the MSDU, not the MPDU. |
| * |
| * Finally, for received frames, the driver is able to indicate that it has |
| * filled a radiotap header and put that in front of the frame; if it does |
| * not do so then mac80211 may add this under certain circumstances. |
| */ |
| |
| /** |
| * struct ieee80211_ht_bss_info - describing BSS's HT characteristics |
| * |
| * This structure describes most essential parameters needed |
| * to describe 802.11n HT characteristics in a BSS. |
| * |
| * @primary_channel: channel number of primery channel |
| * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width) |
| * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection) |
| */ |
| struct ieee80211_ht_bss_info { |
| u8 primary_channel; |
| u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */ |
| u8 bss_op_mode; /* use IEEE80211_HT_IE_ */ |
| }; |
| |
| /** |
| * enum ieee80211_max_queues - maximum number of queues |
| * |
| * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. |
| */ |
| enum ieee80211_max_queues { |
| IEEE80211_MAX_QUEUES = 4, |
| }; |
| |
| /** |
| * struct ieee80211_tx_queue_params - transmit queue configuration |
| * |
| * The information provided in this structure is required for QoS |
| * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. |
| * |
| * @aifs: arbitration interframe space [0..255] |
| * @cw_min: minimum contention window [a value of the form |
| * 2^n-1 in the range 1..32767] |
| * @cw_max: maximum contention window [like @cw_min] |
| * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled |
| */ |
| struct ieee80211_tx_queue_params { |
| u16 txop; |
| u16 cw_min; |
| u16 cw_max; |
| u8 aifs; |
| }; |
| |
| /** |
| * struct ieee80211_tx_queue_stats - transmit queue statistics |
| * |
| * @len: number of packets in queue |
| * @limit: queue length limit |
| * @count: number of frames sent |
| */ |
| struct ieee80211_tx_queue_stats { |
| unsigned int len; |
| unsigned int limit; |
| unsigned int count; |
| }; |
| |
| struct ieee80211_low_level_stats { |
| unsigned int dot11ACKFailureCount; |
| unsigned int dot11RTSFailureCount; |
| unsigned int dot11FCSErrorCount; |
| unsigned int dot11RTSSuccessCount; |
| }; |
| |
| /** |
| * enum ieee80211_bss_change - BSS change notification flags |
| * |
| * These flags are used with the bss_info_changed() callback |
| * to indicate which BSS parameter changed. |
| * |
| * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), |
| * also implies a change in the AID. |
| * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed |
| * @BSS_CHANGED_ERP_PREAMBLE: preamble changed |
| * @BSS_CHANGED_ERP_SLOT: slot timing changed |
| * @BSS_CHANGED_HT: 802.11n parameters changed |
| * @BSS_CHANGED_BASIC_RATES: Basic rateset changed |
| * @BSS_CHANGED_BEACON_INT: Beacon interval changed |
| * @BSS_CHANGED_BSSID: BSSID changed, for whatever |
| * reason (IBSS and managed mode) |
| * @BSS_CHANGED_BEACON: Beacon data changed, retrieve |
| * new beacon (beaconing modes) |
| * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be |
| * enabled/disabled (beaconing modes) |
| */ |
| enum ieee80211_bss_change { |
| BSS_CHANGED_ASSOC = 1<<0, |
| BSS_CHANGED_ERP_CTS_PROT = 1<<1, |
| BSS_CHANGED_ERP_PREAMBLE = 1<<2, |
| BSS_CHANGED_ERP_SLOT = 1<<3, |
| BSS_CHANGED_HT = 1<<4, |
| BSS_CHANGED_BASIC_RATES = 1<<5, |
| BSS_CHANGED_BEACON_INT = 1<<6, |
| BSS_CHANGED_BSSID = 1<<7, |
| BSS_CHANGED_BEACON = 1<<8, |
| BSS_CHANGED_BEACON_ENABLED = 1<<9, |
| }; |
| |
| /** |
| * struct ieee80211_bss_ht_conf - BSS's changing HT configuration |
| * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info) |
| */ |
| struct ieee80211_bss_ht_conf { |
| u16 operation_mode; |
| }; |
| |
| /** |
| * struct ieee80211_bss_conf - holds the BSS's changing parameters |
| * |
| * This structure keeps information about a BSS (and an association |
| * to that BSS) that can change during the lifetime of the BSS. |
| * |
| * @assoc: association status |
| * @aid: association ID number, valid only when @assoc is true |
| * @use_cts_prot: use CTS protection |
| * @use_short_preamble: use 802.11b short preamble; |
| * if the hardware cannot handle this it must set the |
| * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag |
| * @use_short_slot: use short slot time (only relevant for ERP); |
| * if the hardware cannot handle this it must set the |
| * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag |
| * @dtim_period: num of beacons before the next DTIM, for PSM |
| * @timestamp: beacon timestamp |
| * @beacon_int: beacon interval |
| * @assoc_capability: capabilities taken from assoc resp |
| * @ht: BSS's HT configuration |
| * @basic_rates: bitmap of basic rates, each bit stands for an |
| * index into the rate table configured by the driver in |
| * the current band. |
| * @bssid: The BSSID for this BSS |
| * @enable_beacon: whether beaconing should be enabled or not |
| */ |
| struct ieee80211_bss_conf { |
| const u8 *bssid; |
| /* association related data */ |
| bool assoc; |
| u16 aid; |
| /* erp related data */ |
| bool use_cts_prot; |
| bool use_short_preamble; |
| bool use_short_slot; |
| bool enable_beacon; |
| u8 dtim_period; |
| u16 beacon_int; |
| u16 assoc_capability; |
| u64 timestamp; |
| u32 basic_rates; |
| struct ieee80211_bss_ht_conf ht; |
| }; |
| |
| /** |
| * enum mac80211_tx_control_flags - flags to describe transmission information/status |
| * |
| * These flags are used with the @flags member of &ieee80211_tx_info. |
| * |
| * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. |
| * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence |
| * number to this frame, taking care of not overwriting the fragment |
| * number and increasing the sequence number only when the |
| * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly |
| * assign sequence numbers to QoS-data frames but cannot do so correctly |
| * for non-QoS-data and management frames because beacons need them from |
| * that counter as well and mac80211 cannot guarantee proper sequencing. |
| * If this flag is set, the driver should instruct the hardware to |
| * assign a sequence number to the frame or assign one itself. Cf. IEEE |
| * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for |
| * beacons and always be clear for frames without a sequence number field. |
| * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack |
| * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination |
| * station |
| * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame |
| * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon |
| * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU |
| * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. |
| * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted |
| * because the destination STA was in powersave mode. |
| * @IEEE80211_TX_STAT_ACK: Frame was acknowledged |
| * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status |
| * is for the whole aggregation. |
| * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, |
| * so consider using block ack request (BAR). |
| * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be |
| * set by rate control algorithms to indicate probe rate, will |
| * be cleared for fragmented frames (except on the last fragment) |
| * @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or |
| * set this flag in the driver; indicates that the rate control |
| * algorithm was used and should be notified of TX status |
| * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, |
| * used to indicate that a pending frame requires TX processing before |
| * it can be sent out. |
| */ |
| enum mac80211_tx_control_flags { |
| IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), |
| IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), |
| IEEE80211_TX_CTL_NO_ACK = BIT(2), |
| IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), |
| IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), |
| IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), |
| IEEE80211_TX_CTL_AMPDU = BIT(6), |
| IEEE80211_TX_CTL_INJECTED = BIT(7), |
| IEEE80211_TX_STAT_TX_FILTERED = BIT(8), |
| IEEE80211_TX_STAT_ACK = BIT(9), |
| IEEE80211_TX_STAT_AMPDU = BIT(10), |
| IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), |
| IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), |
| IEEE80211_TX_INTFL_RCALGO = BIT(13), |
| IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), |
| }; |
| |
| /** |
| * enum mac80211_rate_control_flags - per-rate flags set by the |
| * Rate Control algorithm. |
| * |
| * These flags are set by the Rate control algorithm for each rate during tx, |
| * in the @flags member of struct ieee80211_tx_rate. |
| * |
| * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. |
| * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. |
| * This is set if the current BSS requires ERP protection. |
| * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. |
| * @IEEE80211_TX_RC_MCS: HT rate. |
| * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in |
| * Greenfield mode. |
| * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. |
| * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the |
| * adjacent 20 MHz channels, if the current channel type is |
| * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. |
| * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. |
| */ |
| enum mac80211_rate_control_flags { |
| IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), |
| IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), |
| IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), |
| |
| /* rate index is an MCS rate number instead of an index */ |
| IEEE80211_TX_RC_MCS = BIT(3), |
| IEEE80211_TX_RC_GREEN_FIELD = BIT(4), |
| IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), |
| IEEE80211_TX_RC_DUP_DATA = BIT(6), |
| IEEE80211_TX_RC_SHORT_GI = BIT(7), |
| }; |
| |
| |
| /* there are 40 bytes if you don't need the rateset to be kept */ |
| #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 |
| |
| /* if you do need the rateset, then you have less space */ |
| #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 |
| |
| /* maximum number of rate stages */ |
| #define IEEE80211_TX_MAX_RATES 5 |
| |
| /** |
| * struct ieee80211_tx_rate - rate selection/status |
| * |
| * @idx: rate index to attempt to send with |
| * @flags: rate control flags (&enum mac80211_rate_control_flags) |
| * @count: number of tries in this rate before going to the next rate |
| * |
| * A value of -1 for @idx indicates an invalid rate and, if used |
| * in an array of retry rates, that no more rates should be tried. |
| * |
| * When used for transmit status reporting, the driver should |
| * always report the rate along with the flags it used. |
| */ |
| struct ieee80211_tx_rate { |
| s8 idx; |
| u8 count; |
| u8 flags; |
| } __attribute__((packed)); |
| |
| /** |
| * struct ieee80211_tx_info - skb transmit information |
| * |
| * This structure is placed in skb->cb for three uses: |
| * (1) mac80211 TX control - mac80211 tells the driver what to do |
| * (2) driver internal use (if applicable) |
| * (3) TX status information - driver tells mac80211 what happened |
| * |
| * The TX control's sta pointer is only valid during the ->tx call, |
| * it may be NULL. |
| * |
| * @flags: transmit info flags, defined above |
| * @band: the band to transmit on (use for checking for races) |
| * @antenna_sel_tx: antenna to use, 0 for automatic diversity |
| * @pad: padding, ignore |
| * @control: union for control data |
| * @status: union for status data |
| * @driver_data: array of driver_data pointers |
| * @ampdu_ack_len: number of aggregated frames. |
| * relevant only if IEEE80211_TX_STATUS_AMPDU was set. |
| * @ampdu_ack_map: block ack bit map for the aggregation. |
| * relevant only if IEEE80211_TX_STATUS_AMPDU was set. |
| * @ack_signal: signal strength of the ACK frame |
| */ |
| struct ieee80211_tx_info { |
| /* common information */ |
| u32 flags; |
| u8 band; |
| |
| u8 antenna_sel_tx; |
| |
| /* 2 byte hole */ |
| u8 pad[2]; |
| |
| union { |
| struct { |
| union { |
| /* rate control */ |
| struct { |
| struct ieee80211_tx_rate rates[ |
| IEEE80211_TX_MAX_RATES]; |
| s8 rts_cts_rate_idx; |
| }; |
| /* only needed before rate control */ |
| unsigned long jiffies; |
| }; |
| /* NB: vif can be NULL for injected frames */ |
| struct ieee80211_vif *vif; |
| struct ieee80211_key_conf *hw_key; |
| struct ieee80211_sta *sta; |
| } control; |
| struct { |
| struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; |
| u8 ampdu_ack_len; |
| u64 ampdu_ack_map; |
| int ack_signal; |
| /* 8 bytes free */ |
| } status; |
| struct { |
| struct ieee80211_tx_rate driver_rates[ |
| IEEE80211_TX_MAX_RATES]; |
| void *rate_driver_data[ |
| IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; |
| }; |
| void *driver_data[ |
| IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; |
| }; |
| }; |
| |
| static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) |
| { |
| return (struct ieee80211_tx_info *)skb->cb; |
| } |
| |
| /** |
| * ieee80211_tx_info_clear_status - clear TX status |
| * |
| * @info: The &struct ieee80211_tx_info to be cleared. |
| * |
| * When the driver passes an skb back to mac80211, it must report |
| * a number of things in TX status. This function clears everything |
| * in the TX status but the rate control information (it does clear |
| * the count since you need to fill that in anyway). |
| * |
| * NOTE: You can only use this function if you do NOT use |
| * info->driver_data! Use info->rate_driver_data |
| * instead if you need only the less space that allows. |
| */ |
| static inline void |
| ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) |
| { |
| int i; |
| |
| BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != |
| offsetof(struct ieee80211_tx_info, control.rates)); |
| BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != |
| offsetof(struct ieee80211_tx_info, driver_rates)); |
| BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); |
| /* clear the rate counts */ |
| for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) |
| info->status.rates[i].count = 0; |
| |
| BUILD_BUG_ON( |
| offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); |
| memset(&info->status.ampdu_ack_len, 0, |
| sizeof(struct ieee80211_tx_info) - |
| offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); |
| } |
| |
| |
| /** |
| * enum mac80211_rx_flags - receive flags |
| * |
| * These flags are used with the @flag member of &struct ieee80211_rx_status. |
| * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. |
| * Use together with %RX_FLAG_MMIC_STRIPPED. |
| * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. |
| * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. |
| * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, |
| * verification has been done by the hardware. |
| * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. |
| * If this flag is set, the stack cannot do any replay detection |
| * hence the driver or hardware will have to do that. |
| * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on |
| * the frame. |
| * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on |
| * the frame. |
| * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) |
| * is valid. This is useful in monitor mode and necessary for beacon frames |
| * to enable IBSS merging. |
| * @RX_FLAG_SHORTPRE: Short preamble was used for this frame |
| * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index |
| * @RX_FLAG_40MHZ: HT40 (40 MHz) was used |
| * @RX_FLAG_SHORT_GI: Short guard interval was used |
| */ |
| enum mac80211_rx_flags { |
| RX_FLAG_MMIC_ERROR = 1<<0, |
| RX_FLAG_DECRYPTED = 1<<1, |
| RX_FLAG_RADIOTAP = 1<<2, |
| RX_FLAG_MMIC_STRIPPED = 1<<3, |
| RX_FLAG_IV_STRIPPED = 1<<4, |
| RX_FLAG_FAILED_FCS_CRC = 1<<5, |
| RX_FLAG_FAILED_PLCP_CRC = 1<<6, |
| RX_FLAG_TSFT = 1<<7, |
| RX_FLAG_SHORTPRE = 1<<8, |
| RX_FLAG_HT = 1<<9, |
| RX_FLAG_40MHZ = 1<<10, |
| RX_FLAG_SHORT_GI = 1<<11, |
| }; |
| |
| /** |
| * struct ieee80211_rx_status - receive status |
| * |
| * The low-level driver should provide this information (the subset |
| * supported by hardware) to the 802.11 code with each received |
| * frame. |
| * |
| * @mactime: value in microseconds of the 64-bit Time Synchronization Function |
| * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. |
| * @band: the active band when this frame was received |
| * @freq: frequency the radio was tuned to when receiving this frame, in MHz |
| * @signal: signal strength when receiving this frame, either in dBm, in dB or |
| * unspecified depending on the hardware capabilities flags |
| * @IEEE80211_HW_SIGNAL_* |
| * @noise: noise when receiving this frame, in dBm. |
| * @qual: overall signal quality indication, in percent (0-100). |
| * @antenna: antenna used |
| * @rate_idx: index of data rate into band's supported rates or MCS index if |
| * HT rates are use (RX_FLAG_HT) |
| * @flag: %RX_FLAG_* |
| */ |
| struct ieee80211_rx_status { |
| u64 mactime; |
| enum ieee80211_band band; |
| int freq; |
| int signal; |
| int noise; |
| int qual; |
| int antenna; |
| int rate_idx; |
| int flag; |
| }; |
| |
| /** |
| * enum ieee80211_conf_flags - configuration flags |
| * |
| * Flags to define PHY configuration options |
| * |
| * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) |
| * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only) |
| * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set |
| * the driver should be prepared to handle configuration requests but |
| * may turn the device off as much as possible. Typically, this flag will |
| * be set when an interface is set UP but not associated or scanning, but |
| * it can also be unset in that case when monitor interfaces are active. |
| */ |
| enum ieee80211_conf_flags { |
| IEEE80211_CONF_RADIOTAP = (1<<0), |
| IEEE80211_CONF_PS = (1<<1), |
| IEEE80211_CONF_IDLE = (1<<2), |
| }; |
| |
| |
| /** |
| * enum ieee80211_conf_changed - denotes which configuration changed |
| * |
| * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed |
| * @_IEEE80211_CONF_CHANGE_BEACON_INTERVAL: DEPRECATED |
| * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed |
| * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed |
| * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed |
| * @IEEE80211_CONF_CHANGE_POWER: the TX power changed |
| * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed |
| * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed |
| * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed |
| */ |
| enum ieee80211_conf_changed { |
| IEEE80211_CONF_CHANGE_RADIO_ENABLED = BIT(0), |
| _IEEE80211_CONF_CHANGE_BEACON_INTERVAL = BIT(1), |
| IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), |
| IEEE80211_CONF_CHANGE_RADIOTAP = BIT(3), |
| IEEE80211_CONF_CHANGE_PS = BIT(4), |
| IEEE80211_CONF_CHANGE_POWER = BIT(5), |
| IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), |
| IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), |
| IEEE80211_CONF_CHANGE_IDLE = BIT(8), |
| }; |
| |
| static inline __deprecated enum ieee80211_conf_changed |
| __IEEE80211_CONF_CHANGE_BEACON_INTERVAL(void) |
| { |
| return _IEEE80211_CONF_CHANGE_BEACON_INTERVAL; |
| } |
| #define IEEE80211_CONF_CHANGE_BEACON_INTERVAL \ |
| __IEEE80211_CONF_CHANGE_BEACON_INTERVAL() |
| |
| /** |
| * struct ieee80211_conf - configuration of the device |
| * |
| * This struct indicates how the driver shall configure the hardware. |
| * |
| * @flags: configuration flags defined above |
| * |
| * @radio_enabled: when zero, driver is required to switch off the radio. |
| * @beacon_int: beacon interval (TODO make interface config) |
| * |
| * @listen_interval: listen interval in units of beacon interval |
| * @max_sleep_period: the maximum number of beacon intervals to sleep for |
| * before checking the beacon for a TIM bit (managed mode only); this |
| * value will be only achievable between DTIM frames, the hardware |
| * needs to check for the multicast traffic bit in DTIM beacons. |
| * This variable is valid only when the CONF_PS flag is set. |
| * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the |
| * powersave documentation below. This variable is valid only when |
| * the CONF_PS flag is set. |
| * |
| * @power_level: requested transmit power (in dBm) |
| * |
| * @channel: the channel to tune to |
| * @channel_type: the channel (HT) type |
| * |
| * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame |
| * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, |
| * but actually means the number of transmissions not the number of retries |
| * @short_frame_max_tx_count: Maximum number of transmissions for a "short" |
| * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the |
| * number of transmissions not the number of retries |
| */ |
| struct ieee80211_conf { |
| int beacon_int; |
| u32 flags; |
| int power_level, dynamic_ps_timeout; |
| int max_sleep_period; |
| |
| u16 listen_interval; |
| bool radio_enabled; |
| |
| u8 long_frame_max_tx_count, short_frame_max_tx_count; |
| |
| struct ieee80211_channel *channel; |
| enum nl80211_channel_type channel_type; |
| }; |
| |
| /** |
| * struct ieee80211_vif - per-interface data |
| * |
| * Data in this structure is continually present for driver |
| * use during the life of a virtual interface. |
| * |
| * @type: type of this virtual interface |
| * @bss_conf: BSS configuration for this interface, either our own |
| * or the BSS we're associated to |
| * @drv_priv: data area for driver use, will always be aligned to |
| * sizeof(void *). |
| */ |
| struct ieee80211_vif { |
| enum nl80211_iftype type; |
| struct ieee80211_bss_conf bss_conf; |
| /* must be last */ |
| u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); |
| }; |
| |
| static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) |
| { |
| #ifdef CONFIG_MAC80211_MESH |
| return vif->type == NL80211_IFTYPE_MESH_POINT; |
| #endif |
| return false; |
| } |
| |
| /** |
| * struct ieee80211_if_init_conf - initial configuration of an interface |
| * |
| * @vif: pointer to a driver-use per-interface structure. The pointer |
| * itself is also used for various functions including |
| * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). |
| * @type: one of &enum nl80211_iftype constants. Determines the type of |
| * added/removed interface. |
| * @mac_addr: pointer to MAC address of the interface. This pointer is valid |
| * until the interface is removed (i.e. it cannot be used after |
| * remove_interface() callback was called for this interface). |
| * |
| * This structure is used in add_interface() and remove_interface() |
| * callbacks of &struct ieee80211_hw. |
| * |
| * When you allow multiple interfaces to be added to your PHY, take care |
| * that the hardware can actually handle multiple MAC addresses. However, |
| * also take care that when there's no interface left with mac_addr != %NULL |
| * you remove the MAC address from the device to avoid acknowledging packets |
| * in pure monitor mode. |
| */ |
| struct ieee80211_if_init_conf { |
| enum nl80211_iftype type; |
| struct ieee80211_vif *vif; |
| void *mac_addr; |
| }; |
| |
| /** |
| * enum ieee80211_key_alg - key algorithm |
| * @ALG_WEP: WEP40 or WEP104 |
| * @ALG_TKIP: TKIP |
| * @ALG_CCMP: CCMP (AES) |
| * @ALG_AES_CMAC: AES-128-CMAC |
| */ |
| enum ieee80211_key_alg { |
| ALG_WEP, |
| ALG_TKIP, |
| ALG_CCMP, |
| ALG_AES_CMAC, |
| }; |
| |
| /** |
| * enum ieee80211_key_len - key length |
| * @LEN_WEP40: WEP 5-byte long key |
| * @LEN_WEP104: WEP 13-byte long key |
| */ |
| enum ieee80211_key_len { |
| LEN_WEP40 = 5, |
| LEN_WEP104 = 13, |
| }; |
| |
| /** |
| * enum ieee80211_key_flags - key flags |
| * |
| * These flags are used for communication about keys between the driver |
| * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. |
| * |
| * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates |
| * that the STA this key will be used with could be using QoS. |
| * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the |
| * driver to indicate that it requires IV generation for this |
| * particular key. |
| * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by |
| * the driver for a TKIP key if it requires Michael MIC |
| * generation in software. |
| * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates |
| * that the key is pairwise rather then a shared key. |
| * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a |
| * CCMP key if it requires CCMP encryption of management frames (MFP) to |
| * be done in software. |
| */ |
| enum ieee80211_key_flags { |
| IEEE80211_KEY_FLAG_WMM_STA = 1<<0, |
| IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, |
| IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, |
| IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, |
| IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, |
| }; |
| |
| /** |
| * struct ieee80211_key_conf - key information |
| * |
| * This key information is given by mac80211 to the driver by |
| * the set_key() callback in &struct ieee80211_ops. |
| * |
| * @hw_key_idx: To be set by the driver, this is the key index the driver |
| * wants to be given when a frame is transmitted and needs to be |
| * encrypted in hardware. |
| * @alg: The key algorithm. |
| * @flags: key flags, see &enum ieee80211_key_flags. |
| * @keyidx: the key index (0-3) |
| * @keylen: key material length |
| * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) |
| * data block: |
| * - Temporal Encryption Key (128 bits) |
| * - Temporal Authenticator Tx MIC Key (64 bits) |
| * - Temporal Authenticator Rx MIC Key (64 bits) |
| * @icv_len: The ICV length for this key type |
| * @iv_len: The IV length for this key type |
| */ |
| struct ieee80211_key_conf { |
| enum ieee80211_key_alg alg; |
| u8 icv_len; |
| u8 iv_len; |
| u8 hw_key_idx; |
| u8 flags; |
| s8 keyidx; |
| u8 keylen; |
| u8 key[0]; |
| }; |
| |
| /** |
| * enum set_key_cmd - key command |
| * |
| * Used with the set_key() callback in &struct ieee80211_ops, this |
| * indicates whether a key is being removed or added. |
| * |
| * @SET_KEY: a key is set |
| * @DISABLE_KEY: a key must be disabled |
| */ |
| enum set_key_cmd { |
| SET_KEY, DISABLE_KEY, |
| }; |
| |
| /** |
| * struct ieee80211_sta - station table entry |
| * |
| * A station table entry represents a station we are possibly |
| * communicating with. Since stations are RCU-managed in |
| * mac80211, any ieee80211_sta pointer you get access to must |
| * either be protected by rcu_read_lock() explicitly or implicitly, |
| * or you must take good care to not use such a pointer after a |
| * call to your sta_notify callback that removed it. |
| * |
| * @addr: MAC address |
| * @aid: AID we assigned to the station if we're an AP |
| * @supp_rates: Bitmap of supported rates (per band) |
| * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities |
| * @drv_priv: data area for driver use, will always be aligned to |
| * sizeof(void *), size is determined in hw information. |
| */ |
| struct ieee80211_sta { |
| u32 supp_rates[IEEE80211_NUM_BANDS]; |
| u8 addr[ETH_ALEN]; |
| u16 aid; |
| struct ieee80211_sta_ht_cap ht_cap; |
| |
| /* must be last */ |
| u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); |
| }; |
| |
| /** |
| * enum sta_notify_cmd - sta notify command |
| * |
| * Used with the sta_notify() callback in &struct ieee80211_ops, this |
| * indicates addition and removal of a station to station table, |
| * or if a associated station made a power state transition. |
| * |
| * @STA_NOTIFY_ADD: a station was added to the station table |
| * @STA_NOTIFY_REMOVE: a station being removed from the station table |
| * @STA_NOTIFY_SLEEP: a station is now sleeping |
| * @STA_NOTIFY_AWAKE: a sleeping station woke up |
| */ |
| enum sta_notify_cmd { |
| STA_NOTIFY_ADD, STA_NOTIFY_REMOVE, |
| STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, |
| }; |
| |
| /** |
| * enum ieee80211_tkip_key_type - get tkip key |
| * |
| * Used by drivers which need to get a tkip key for skb. Some drivers need a |
| * phase 1 key, others need a phase 2 key. A single function allows the driver |
| * to get the key, this enum indicates what type of key is required. |
| * |
| * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key |
| * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key |
| */ |
| enum ieee80211_tkip_key_type { |
| IEEE80211_TKIP_P1_KEY, |
| IEEE80211_TKIP_P2_KEY, |
| }; |
| |
| /** |
| * enum ieee80211_hw_flags - hardware flags |
| * |
| * These flags are used to indicate hardware capabilities to |
| * the stack. Generally, flags here should have their meaning |
| * done in a way that the simplest hardware doesn't need setting |
| * any particular flags. There are some exceptions to this rule, |
| * however, so you are advised to review these flags carefully. |
| * |
| * @IEEE80211_HW_RX_INCLUDES_FCS: |
| * Indicates that received frames passed to the stack include |
| * the FCS at the end. |
| * |
| * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: |
| * Some wireless LAN chipsets buffer broadcast/multicast frames |
| * for power saving stations in the hardware/firmware and others |
| * rely on the host system for such buffering. This option is used |
| * to configure the IEEE 802.11 upper layer to buffer broadcast and |
| * multicast frames when there are power saving stations so that |
| * the driver can fetch them with ieee80211_get_buffered_bc(). |
| * |
| * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: |
| * Hardware is not capable of short slot operation on the 2.4 GHz band. |
| * |
| * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: |
| * Hardware is not capable of receiving frames with short preamble on |
| * the 2.4 GHz band. |
| * |
| * @IEEE80211_HW_SIGNAL_UNSPEC: |
| * Hardware can provide signal values but we don't know its units. We |
| * expect values between 0 and @max_signal. |
| * If possible please provide dB or dBm instead. |
| * |
| * @IEEE80211_HW_SIGNAL_DBM: |
| * Hardware gives signal values in dBm, decibel difference from |
| * one milliwatt. This is the preferred method since it is standardized |
| * between different devices. @max_signal does not need to be set. |
| * |
| * @IEEE80211_HW_NOISE_DBM: |
| * Hardware can provide noise (radio interference) values in units dBm, |
| * decibel difference from one milliwatt. |
| * |
| * @IEEE80211_HW_SPECTRUM_MGMT: |
| * Hardware supports spectrum management defined in 802.11h |
| * Measurement, Channel Switch, Quieting, TPC |
| * |
| * @IEEE80211_HW_AMPDU_AGGREGATION: |
| * Hardware supports 11n A-MPDU aggregation. |
| * |
| * @IEEE80211_HW_SUPPORTS_PS: |
| * Hardware has power save support (i.e. can go to sleep). |
| * |
| * @IEEE80211_HW_PS_NULLFUNC_STACK: |
| * Hardware requires nullfunc frame handling in stack, implies |
| * stack support for dynamic PS. |
| * |
| * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: |
| * Hardware has support for dynamic PS. |
| * |
| * @IEEE80211_HW_MFP_CAPABLE: |
| * Hardware supports management frame protection (MFP, IEEE 802.11w). |
| * |
| * @IEEE80211_HW_BEACON_FILTER: |
| * Hardware supports dropping of irrelevant beacon frames to |
| * avoid waking up cpu. |
| */ |
| enum ieee80211_hw_flags { |
| IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, |
| IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, |
| IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, |
| IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, |
| IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, |
| IEEE80211_HW_SIGNAL_DBM = 1<<6, |
| IEEE80211_HW_NOISE_DBM = 1<<7, |
| IEEE80211_HW_SPECTRUM_MGMT = 1<<8, |
| IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, |
| IEEE80211_HW_SUPPORTS_PS = 1<<10, |
| IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, |
| IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, |
| IEEE80211_HW_MFP_CAPABLE = 1<<13, |
| IEEE80211_HW_BEACON_FILTER = 1<<14, |
| }; |
| |
| /** |
| * struct ieee80211_hw - hardware information and state |
| * |
| * This structure contains the configuration and hardware |
| * information for an 802.11 PHY. |
| * |
| * @wiphy: This points to the &struct wiphy allocated for this |
| * 802.11 PHY. You must fill in the @perm_addr and @dev |
| * members of this structure using SET_IEEE80211_DEV() |
| * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported |
| * bands (with channels, bitrates) are registered here. |
| * |
| * @conf: &struct ieee80211_conf, device configuration, don't use. |
| * |
| * @workqueue: single threaded workqueue available for driver use, |
| * allocated by mac80211 on registration and flushed when an |
| * interface is removed. |
| * NOTICE: All work performed on this workqueue must not |
| * acquire the RTNL lock. |
| * |
| * @priv: pointer to private area that was allocated for driver use |
| * along with this structure. |
| * |
| * @flags: hardware flags, see &enum ieee80211_hw_flags. |
| * |
| * @extra_tx_headroom: headroom to reserve in each transmit skb |
| * for use by the driver (e.g. for transmit headers.) |
| * |
| * @channel_change_time: time (in microseconds) it takes to change channels. |
| * |
| * @max_signal: Maximum value for signal (rssi) in RX information, used |
| * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB |
| * |
| * @max_listen_interval: max listen interval in units of beacon interval |
| * that HW supports |
| * |
| * @queues: number of available hardware transmit queues for |
| * data packets. WMM/QoS requires at least four, these |
| * queues need to have configurable access parameters. |
| * |
| * @rate_control_algorithm: rate control algorithm for this hardware. |
| * If unset (NULL), the default algorithm will be used. Must be |
| * set before calling ieee80211_register_hw(). |
| * |
| * @vif_data_size: size (in bytes) of the drv_priv data area |
| * within &struct ieee80211_vif. |
| * @sta_data_size: size (in bytes) of the drv_priv data area |
| * within &struct ieee80211_sta. |
| * |
| * @max_rates: maximum number of alternate rate retry stages |
| * @max_rate_tries: maximum number of tries for each stage |
| */ |
| struct ieee80211_hw { |
| struct ieee80211_conf conf; |
| struct wiphy *wiphy; |
| struct workqueue_struct *workqueue; |
| const char *rate_control_algorithm; |
| void *priv; |
| u32 flags; |
| unsigned int extra_tx_headroom; |
| int channel_change_time; |
| int vif_data_size; |
| int sta_data_size; |
| u16 queues; |
| u16 max_listen_interval; |
| s8 max_signal; |
| u8 max_rates; |
| u8 max_rate_tries; |
| }; |
| |
| /** |
| * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy |
| * |
| * @wiphy: the &struct wiphy which we want to query |
| * |
| * mac80211 drivers can use this to get to their respective |
| * &struct ieee80211_hw. Drivers wishing to get to their own private |
| * structure can then access it via hw->priv. Note that mac802111 drivers should |
| * not use wiphy_priv() to try to get their private driver structure as this |
| * is already used internally by mac80211. |
| */ |
| struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); |
| |
| /** |
| * SET_IEEE80211_DEV - set device for 802.11 hardware |
| * |
| * @hw: the &struct ieee80211_hw to set the device for |
| * @dev: the &struct device of this 802.11 device |
| */ |
| static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) |
| { |
| set_wiphy_dev(hw->wiphy, dev); |
| } |
| |
| /** |
| * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware |
| * |
| * @hw: the &struct ieee80211_hw to set the MAC address for |
| * @addr: the address to set |
| */ |
| static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) |
| { |
| memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); |
| } |
| |
| static inline struct ieee80211_rate * |
| ieee80211_get_tx_rate(const struct ieee80211_hw *hw, |
| const struct ieee80211_tx_info *c) |
| { |
| if (WARN_ON(c->control.rates[0].idx < 0)) |
| return NULL; |
| return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; |
| } |
| |
| static inline struct ieee80211_rate * |
| ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, |
| const struct ieee80211_tx_info *c) |
| { |
| if (c->control.rts_cts_rate_idx < 0) |
| return NULL; |
| return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; |
| } |
| |
| static inline struct ieee80211_rate * |
| ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, |
| const struct ieee80211_tx_info *c, int idx) |
| { |
| if (c->control.rates[idx + 1].idx < 0) |
| return NULL; |
| return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; |
| } |
| |
| /** |
| * DOC: Hardware crypto acceleration |
| * |
| * mac80211 is capable of taking advantage of many hardware |
| * acceleration designs for encryption and decryption operations. |
| * |
| * The set_key() callback in the &struct ieee80211_ops for a given |
| * device is called to enable hardware acceleration of encryption and |
| * decryption. The callback takes a @sta parameter that will be NULL |
| * for default keys or keys used for transmission only, or point to |
| * the station information for the peer for individual keys. |
| * Multiple transmission keys with the same key index may be used when |
| * VLANs are configured for an access point. |
| * |
| * When transmitting, the TX control data will use the @hw_key_idx |
| * selected by the driver by modifying the &struct ieee80211_key_conf |
| * pointed to by the @key parameter to the set_key() function. |
| * |
| * The set_key() call for the %SET_KEY command should return 0 if |
| * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be |
| * added; if you return 0 then hw_key_idx must be assigned to the |
| * hardware key index, you are free to use the full u8 range. |
| * |
| * When the cmd is %DISABLE_KEY then it must succeed. |
| * |
| * Note that it is permissible to not decrypt a frame even if a key |
| * for it has been uploaded to hardware, the stack will not make any |
| * decision based on whether a key has been uploaded or not but rather |
| * based on the receive flags. |
| * |
| * The &struct ieee80211_key_conf structure pointed to by the @key |
| * parameter is guaranteed to be valid until another call to set_key() |
| * removes it, but it can only be used as a cookie to differentiate |
| * keys. |
| * |
| * In TKIP some HW need to be provided a phase 1 key, for RX decryption |
| * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key |
| * handler. |
| * The update_tkip_key() call updates the driver with the new phase 1 key. |
| * This happens everytime the iv16 wraps around (every 65536 packets). The |
| * set_key() call will happen only once for each key (unless the AP did |
| * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is |
| * provided by update_tkip_key only. The trigger that makes mac80211 call this |
| * handler is software decryption with wrap around of iv16. |
| */ |
| |
| /** |
| * DOC: Powersave support |
| * |
| * mac80211 has support for various powersave implementations. |
| * |
| * First, it can support hardware that handles all powersaving by |
| * itself, such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS |
| * hardware flag. In that case, it will be told about the desired |
| * powersave mode depending on the association status, and the driver |
| * must take care of sending nullfunc frames when necessary, i.e. when |
| * entering and leaving powersave mode. The driver is required to look at |
| * the AID in beacons and signal to the AP that it woke up when it finds |
| * traffic directed to it. This mode supports dynamic PS by simply |
| * enabling/disabling PS. |
| * |
| * Additionally, such hardware may set the %IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
| * flag to indicate that it can support dynamic PS mode itself (see below). |
| * |
| * Other hardware designs cannot send nullfunc frames by themselves and also |
| * need software support for parsing the TIM bitmap. This is also supported |
| * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and |
| * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still |
| * required to pass up beacons. The hardware is still required to handle |
| * waking up for multicast traffic; if it cannot the driver must handle that |
| * as best as it can, mac80211 is too slow. |
| * |
| * Dynamic powersave mode is an extension to normal powersave mode in which |
| * the hardware stays awake for a user-specified period of time after sending |
| * a frame so that reply frames need not be buffered and therefore delayed |
| * to the next wakeup. This can either be supported by hardware, in which case |
| * the driver needs to look at the @dynamic_ps_timeout hardware configuration |
| * value, or by the stack if all nullfunc handling is in the stack. |
| */ |
| |
| /** |
| * DOC: Beacon filter support |
| * |
| * Some hardware have beacon filter support to reduce host cpu wakeups |
| * which will reduce system power consumption. It usuallly works so that |
| * the firmware creates a checksum of the beacon but omits all constantly |
| * changing elements (TSF, TIM etc). Whenever the checksum changes the |
| * beacon is forwarded to the host, otherwise it will be just dropped. That |
| * way the host will only receive beacons where some relevant information |
| * (for example ERP protection or WMM settings) have changed. |
| * |
| * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER |
| * hardware capability. The driver needs to enable beacon filter support |
| * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When |
| * power save is enabled, the stack will not check for beacon loss and the |
| * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). |
| * |
| * The time (or number of beacons missed) until the firmware notifies the |
| * driver of a beacon loss event (which in turn causes the driver to call |
| * ieee80211_beacon_loss()) should be configurable and will be controlled |
| * by mac80211 and the roaming algorithm in the future. |
| * |
| * Since there may be constantly changing information elements that nothing |
| * in the software stack cares about, we will, in the future, have mac80211 |
| * tell the driver which information elements are interesting in the sense |
| * that we want to see changes in them. This will include |
| * - a list of information element IDs |
| * - a list of OUIs for the vendor information element |
| * |
| * Ideally, the hardware would filter out any beacons without changes in the |
| * requested elements, but if it cannot support that it may, at the expense |
| * of some efficiency, filter out only a subset. For example, if the device |
| * doesn't support checking for OUIs it should pass up all changes in all |
| * vendor information elements. |
| * |
| * Note that change, for the sake of simplification, also includes information |
| * elements appearing or disappearing from the beacon. |
| * |
| * Some hardware supports an "ignore list" instead, just make sure nothing |
| * that was requested is on the ignore list, and include commonly changing |
| * information element IDs in the ignore list, for example 11 (BSS load) and |
| * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, |
| * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility |
| * it could also include some currently unused IDs. |
| * |
| * |
| * In addition to these capabilities, hardware should support notifying the |
| * host of changes in the beacon RSSI. This is relevant to implement roaming |
| * when no traffic is flowing (when traffic is flowing we see the RSSI of |
| * the received data packets). This can consist in notifying the host when |
| * the RSSI changes significantly or when it drops below or rises above |
| * configurable thresholds. In the future these thresholds will also be |
| * configured by mac80211 (which gets them from userspace) to implement |
| * them as the roaming algorithm requires. |
| * |
| * If the hardware cannot implement this, the driver should ask it to |
| * periodically pass beacon frames to the host so that software can do the |
| * signal strength threshold checking. |
| */ |
| |
| /** |
| * DOC: Frame filtering |
| * |
| * mac80211 requires to see many management frames for proper |
| * operation, and users may want to see many more frames when |
| * in monitor mode. However, for best CPU usage and power consumption, |
| * having as few frames as possible percolate through the stack is |
| * desirable. Hence, the hardware should filter as much as possible. |
| * |
| * To achieve this, mac80211 uses filter flags (see below) to tell |
| * the driver's configure_filter() function which frames should be |
| * passed to mac80211 and which should be filtered out. |
| * |
| * The configure_filter() callback is invoked with the parameters |
| * @mc_count and @mc_list for the combined multicast address list |
| * of all virtual interfaces, @changed_flags telling which flags |
| * were changed and @total_flags with the new flag states. |
| * |
| * If your device has no multicast address filters your driver will |
| * need to check both the %FIF_ALLMULTI flag and the @mc_count |
| * parameter to see whether multicast frames should be accepted |
| * or dropped. |
| * |
| * All unsupported flags in @total_flags must be cleared. |
| * Hardware does not support a flag if it is incapable of _passing_ |
| * the frame to the stack. Otherwise the driver must ignore |
| * the flag, but not clear it. |
| * You must _only_ clear the flag (announce no support for the |
| * flag to mac80211) if you are not able to pass the packet type |
| * to the stack (so the hardware always filters it). |
| * So for example, you should clear @FIF_CONTROL, if your hardware |
| * always filters control frames. If your hardware always passes |
| * control frames to the kernel and is incapable of filtering them, |
| * you do _not_ clear the @FIF_CONTROL flag. |
| * This rule applies to all other FIF flags as well. |
| */ |
| |
| /** |
| * enum ieee80211_filter_flags - hardware filter flags |
| * |
| * These flags determine what the filter in hardware should be |
| * programmed to let through and what should not be passed to the |
| * stack. It is always safe to pass more frames than requested, |
| * but this has negative impact on power consumption. |
| * |
| * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, |
| * think of the BSS as your network segment and then this corresponds |
| * to the regular ethernet device promiscuous mode. |
| * |
| * @FIF_ALLMULTI: pass all multicast frames, this is used if requested |
| * by the user or if the hardware is not capable of filtering by |
| * multicast address. |
| * |
| * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the |
| * %RX_FLAG_FAILED_FCS_CRC for them) |
| * |
| * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set |
| * the %RX_FLAG_FAILED_PLCP_CRC for them |
| * |
| * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate |
| * to the hardware that it should not filter beacons or probe responses |
| * by BSSID. Filtering them can greatly reduce the amount of processing |
| * mac80211 needs to do and the amount of CPU wakeups, so you should |
| * honour this flag if possible. |
| * |
| * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then |
| * only those addressed to this station |
| * |
| * @FIF_OTHER_BSS: pass frames destined to other BSSes |
| */ |
| enum ieee80211_filter_flags { |
| FIF_PROMISC_IN_BSS = 1<<0, |
| FIF_ALLMULTI = 1<<1, |
| FIF_FCSFAIL = 1<<2, |
| FIF_PLCPFAIL = 1<<3, |
| FIF_BCN_PRBRESP_PROMISC = 1<<4, |
| FIF_CONTROL = 1<<5, |
| FIF_OTHER_BSS = 1<<6, |
| }; |
| |
| /** |
| * enum ieee80211_ampdu_mlme_action - A-MPDU actions |
| * |
| * These flags are used with the ampdu_action() callback in |
| * &struct ieee80211_ops to indicate which action is needed. |
| * @IEEE80211_AMPDU_RX_START: start Rx aggregation |
| * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation |
| * @IEEE80211_AMPDU_TX_START: start Tx aggregation |
| * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation |
| * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational |
| */ |
| enum ieee80211_ampdu_mlme_action { |
| IEEE80211_AMPDU_RX_START, |
| IEEE80211_AMPDU_RX_STOP, |
| IEEE80211_AMPDU_TX_START, |
| IEEE80211_AMPDU_TX_STOP, |
| IEEE80211_AMPDU_TX_OPERATIONAL, |
| }; |
| |
| /** |
| * struct ieee80211_ops - callbacks from mac80211 to the driver |
| * |
| * This structure contains various callbacks that the driver may |
| * handle or, in some cases, must handle, for example to configure |
| * the hardware to a new channel or to transmit a frame. |
| * |
| * @tx: Handler that 802.11 module calls for each transmitted frame. |
| * skb contains the buffer starting from the IEEE 802.11 header. |
| * The low-level driver should send the frame out based on |
| * configuration in the TX control data. This handler should, |
| * preferably, never fail and stop queues appropriately, more |
| * importantly, however, it must never fail for A-MPDU-queues. |
| * This function should return NETDEV_TX_OK except in very |
| * limited cases. |
| * Must be implemented and atomic. |
| * |
| * @start: Called before the first netdevice attached to the hardware |
| * is enabled. This should turn on the hardware and must turn on |
| * frame reception (for possibly enabled monitor interfaces.) |
| * Returns negative error codes, these may be seen in userspace, |
| * or zero. |
| * When the device is started it should not have a MAC address |
| * to avoid acknowledging frames before a non-monitor device |
| * is added. |
| * Must be implemented. |
| * |
| * @stop: Called after last netdevice attached to the hardware |
| * is disabled. This should turn off the hardware (at least |
| * it must turn off frame reception.) |
| * May be called right after add_interface if that rejects |
| * an interface. |
| * Must be implemented. |
| * |
| * @add_interface: Called when a netdevice attached to the hardware is |
| * enabled. Because it is not called for monitor mode devices, @start |
| * and @stop must be implemented. |
| * The driver should perform any initialization it needs before |
| * the device can be enabled. The initial configuration for the |
| * interface is given in the conf parameter. |
| * The callback may refuse to add an interface by returning a |
| * negative error code (which will be seen in userspace.) |
| * Must be implemented. |
| * |
| * @remove_interface: Notifies a driver that an interface is going down. |
| * The @stop callback is called after this if it is the last interface |
| * and no monitor interfaces are present. |
| * When all interfaces are removed, the MAC address in the hardware |
| * must be cleared so the device no longer acknowledges packets, |
| * the mac_addr member of the conf structure is, however, set to the |
| * MAC address of the device going away. |
| * Hence, this callback must be implemented. |
| * |
| * @config: Handler for configuration requests. IEEE 802.11 code calls this |
| * function to change hardware configuration, e.g., channel. |
| * This function should never fail but returns a negative error code |
| * if it does. |
| * |
| * @bss_info_changed: Handler for configuration requests related to BSS |
| * parameters that may vary during BSS's lifespan, and may affect low |
| * level driver (e.g. assoc/disassoc status, erp parameters). |
| * This function should not be used if no BSS has been set, unless |
| * for association indication. The @changed parameter indicates which |
| * of the bss parameters has changed when a call is made. |
| * |
| * @configure_filter: Configure the device's RX filter. |
| * See the section "Frame filtering" for more information. |
| * This callback must be implemented and atomic. |
| * |
| * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit |
| * must be set or cleared for a given STA. Must be atomic. |
| * |
| * @set_key: See the section "Hardware crypto acceleration" |
| * This callback can sleep, and is only called between add_interface |
| * and remove_interface calls, i.e. while the given virtual interface |
| * is enabled. |
| * Returns a negative error code if the key can't be added. |
| * |
| * @update_tkip_key: See the section "Hardware crypto acceleration" |
| * This callback will be called in the context of Rx. Called for drivers |
| * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. |
| * |
| * @hw_scan: Ask the hardware to service the scan request, no need to start |
| * the scan state machine in stack. The scan must honour the channel |
| * configuration done by the regulatory agent in the wiphy's |
| * registered bands. The hardware (or the driver) needs to make sure |
| * that power save is disabled. |
| * The @req ie/ie_len members are rewritten by mac80211 to contain the |
| * entire IEs after the SSID, so that drivers need not look at these |
| * at all but just send them after the SSID -- mac80211 includes the |
| * (extended) supported rates and HT information (where applicable). |
| * When the scan finishes, ieee80211_scan_completed() must be called; |
| * note that it also must be called when the scan cannot finish due to |
| * any error unless this callback returned a negative error code. |
| * |
| * @sw_scan_start: Notifier function that is called just before a software scan |
| * is started. Can be NULL, if the driver doesn't need this notification. |
| * |
| * @sw_scan_complete: Notifier function that is called just after a software scan |
| * finished. Can be NULL, if the driver doesn't need this notification. |
| * |
| * @get_stats: Return low-level statistics. |
| * Returns zero if statistics are available. |
| * |
| * @get_tkip_seq: If your device implements TKIP encryption in hardware this |
| * callback should be provided to read the TKIP transmit IVs (both IV32 |
| * and IV16) for the given key from hardware. |
| * |
| * @set_rts_threshold: Configuration of RTS threshold (if device needs it) |
| * |
| * @sta_notify: Notifies low level driver about addition, removal or power |
| * state transition of an associated station, AP, IBSS/WDS/mesh peer etc. |
| * Must be atomic. |
| * |
| * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), |
| * bursting) for a hardware TX queue. |
| * Returns a negative error code on failure. |
| * |
| * @get_tx_stats: Get statistics of the current TX queue status. This is used |
| * to get number of currently queued packets (queue length), maximum queue |
| * size (limit), and total number of packets sent using each TX queue |
| * (count). The 'stats' pointer points to an array that has hw->queues |
| * items. |
| * |
| * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, |
| * this is only used for IBSS mode BSSID merging and debugging. Is not a |
| * required function. |
| * |
| * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. |
| * Currently, this is only used for IBSS mode debugging. Is not a |
| * required function. |
| * |
| * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize |
| * with other STAs in the IBSS. This is only used in IBSS mode. This |
| * function is optional if the firmware/hardware takes full care of |
| * TSF synchronization. |
| * |
| * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. |
| * This is needed only for IBSS mode and the result of this function is |
| * used to determine whether to reply to Probe Requests. |
| * Returns non-zero if this device sent the last beacon. |
| * |
| * @ampdu_action: Perform a certain A-MPDU action |
| * The RA/TID combination determines the destination and TID we want |
| * the ampdu action to be performed for. The action is defined through |
| * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) |
| * is the first frame we expect to perform the action on. Notice |
| * that TX/RX_STOP can pass NULL for this parameter. |
| * Returns a negative error code on failure. |
| */ |
| struct ieee80211_ops { |
| int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); |
| int (*start)(struct ieee80211_hw *hw); |
| void (*stop)(struct ieee80211_hw *hw); |
| int (*add_interface)(struct ieee80211_hw *hw, |
| struct ieee80211_if_init_conf *conf); |
| void (*remove_interface)(struct ieee80211_hw *hw, |
| struct ieee80211_if_init_conf *conf); |
| int (*config)(struct ieee80211_hw *hw, u32 changed); |
| void (*bss_info_changed)(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *info, |
| u32 changed); |
| void (*configure_filter)(struct ieee80211_hw *hw, |
| unsigned int changed_flags, |
| unsigned int *total_flags, |
| int mc_count, struct dev_addr_list *mc_list); |
| int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
| bool set); |
| int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
| struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
| struct ieee80211_key_conf *key); |
| void (*update_tkip_key)(struct ieee80211_hw *hw, |
| struct ieee80211_key_conf *conf, const u8 *address, |
| u32 iv32, u16 *phase1key); |
| int (*hw_scan)(struct ieee80211_hw *hw, |
| struct cfg80211_scan_request *req); |
| void (*sw_scan_start)(struct ieee80211_hw *hw); |
| void (*sw_scan_complete)(struct ieee80211_hw *hw); |
| int (*get_stats)(struct ieee80211_hw *hw, |
| struct ieee80211_low_level_stats *stats); |
| void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, |
| u32 *iv32, u16 *iv16); |
| int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); |
| void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
| enum sta_notify_cmd, struct ieee80211_sta *sta); |
| int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, |
| const struct ieee80211_tx_queue_params *params); |
| int (*get_tx_stats)(struct ieee80211_hw *hw, |
| struct ieee80211_tx_queue_stats *stats); |
| u64 (*get_tsf)(struct ieee80211_hw *hw); |
| void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); |
| void (*reset_tsf)(struct ieee80211_hw *hw); |
| int (*tx_last_beacon)(struct ieee80211_hw *hw); |
| int (*ampdu_action)(struct ieee80211_hw *hw, |
| enum ieee80211_ampdu_mlme_action action, |
| struct ieee80211_sta *sta, u16 tid, u16 *ssn); |
| }; |
| |
| /** |
| * ieee80211_alloc_hw - Allocate a new hardware device |
| * |
| * This must be called once for each hardware device. The returned pointer |
| * must be used to refer to this device when calling other functions. |
| * mac80211 allocates a private data area for the driver pointed to by |
| * @priv in &struct ieee80211_hw, the size of this area is given as |
| * @priv_data_len. |
| * |
| * @priv_data_len: length of private data |
| * @ops: callbacks for this device |
| */ |
| struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
| const struct ieee80211_ops *ops); |
| |
| /** |
| * ieee80211_register_hw - Register hardware device |
| * |
| * You must call this function before any other functions in |
| * mac80211. Note that before a hardware can be registered, you |
| * need to fill the contained wiphy's information. |
| * |
| * @hw: the device to register as returned by ieee80211_alloc_hw() |
| */ |
| int ieee80211_register_hw(struct ieee80211_hw *hw); |
| |
| #ifdef CONFIG_MAC80211_LEDS |
| extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); |
| extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); |
| extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); |
| extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); |
| #endif |
| /** |
| * ieee80211_get_tx_led_name - get name of TX LED |
| * |
| * mac80211 creates a transmit LED trigger for each wireless hardware |
| * that can be used to drive LEDs if your driver registers a LED device. |
| * This function returns the name (or %NULL if not configured for LEDs) |
| * of the trigger so you can automatically link the LED device. |
| * |
| * @hw: the hardware to get the LED trigger name for |
| */ |
| static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) |
| { |
| #ifdef CONFIG_MAC80211_LEDS |
| return __ieee80211_get_tx_led_name(hw); |
| #else |
| return NULL; |
| #endif |
| } |
| |
| /** |
| * ieee80211_get_rx_led_name - get name of RX LED |
| * |
| * mac80211 creates a receive LED trigger for each wireless hardware |
| * that can be used to drive LEDs if your driver registers a LED device. |
| * This function returns the name (or %NULL if not configured for LEDs) |
| * of the trigger so you can automatically link the LED device. |
| * |
| * @hw: the hardware to get the LED trigger name for |
| */ |
| static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) |
| { |
| #ifdef CONFIG_MAC80211_LEDS |
| return __ieee80211_get_rx_led_name(hw); |
| #else |
| return NULL; |
| #endif |
| } |
| |
| /** |
| * ieee80211_get_assoc_led_name - get name of association LED |
| * |
| * mac80211 creates a association LED trigger for each wireless hardware |
| * that can be used to drive LEDs if your driver registers a LED device. |
| * This function returns the name (or %NULL if not configured for LEDs) |
| * of the trigger so you can automatically link the LED device. |
| * |
| * @hw: the hardware to get the LED trigger name for |
| */ |
| static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) |
| { |
| #ifdef CONFIG_MAC80211_LEDS |
| return __ieee80211_get_assoc_led_name(hw); |
| #else |
| return NULL; |
| #endif |
| } |
| |
| /** |
| * ieee80211_get_radio_led_name - get name of radio LED |
| * |
| * mac80211 creates a radio change LED trigger for each wireless hardware |
| * that can be used to drive LEDs if your driver registers a LED device. |
| * This function returns the name (or %NULL if not configured for LEDs) |
| * of the trigger so you can automatically link the LED device. |
| * |
| * @hw: the hardware to get the LED trigger name for |
| */ |
| static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) |
| { |
| #ifdef CONFIG_MAC80211_LEDS |
| return __ieee80211_get_radio_led_name(hw); |
| #else |
| return NULL; |
| #endif |
| } |
| |
| /** |
| * ieee80211_unregister_hw - Unregister a hardware device |
| * |
| * This function instructs mac80211 to free allocated resources |
| * and unregister netdevices from the networking subsystem. |
| * |
| * @hw: the hardware to unregister |
| */ |
| void ieee80211_unregister_hw(struct ieee80211_hw *hw); |
| |
| /** |
| * ieee80211_free_hw - free hardware descriptor |
| * |
| * This function frees everything that was allocated, including the |
| * private data for the driver. You must call ieee80211_unregister_hw() |
| * before calling this function. |
| * |
| * @hw: the hardware to free |
| */ |
| void ieee80211_free_hw(struct ieee80211_hw *hw); |
| |
| /** |
| * ieee80211_restart_hw - restart hardware completely |
| * |
| * Call this function when the hardware was restarted for some reason |
| * (hardware error, ...) and the driver is unable to restore its state |
| * by itself. mac80211 assumes that at this point the driver/hardware |
| * is completely uninitialised and stopped, it starts the process by |
| * calling the ->start() operation. The driver will need to reset all |
| * internal state that it has prior to calling this function. |
| * |
| * @hw: the hardware to restart |
| */ |
| void ieee80211_restart_hw(struct ieee80211_hw *hw); |
| |
| /* trick to avoid symbol clashes with the ieee80211 subsystem */ |
| void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, |
| struct ieee80211_rx_status *status); |
| |
| /** |
| * ieee80211_rx - receive frame |
| * |
| * Use this function to hand received frames to mac80211. The receive |
| * buffer in @skb must start with an IEEE 802.11 header or a radiotap |
| * header if %RX_FLAG_RADIOTAP is set in the @status flags. |
| * |
| * This function may not be called in IRQ context. Calls to this function |
| * for a single hardware must be synchronized against each other. Calls |
| * to this function and ieee80211_rx_irqsafe() may not be mixed for a |
| * single hardware. |
| * |
| * @hw: the hardware this frame came in on |
| * @skb: the buffer to receive, owned by mac80211 after this call |
| * @status: status of this frame; the status pointer need not be valid |
| * after this function returns |
| */ |
| static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, |
| struct ieee80211_rx_status *status) |
| { |
| __ieee80211_rx(hw, skb, status); |
| } |
| |
| /** |
| * ieee80211_rx_irqsafe - receive frame |
| * |
| * Like ieee80211_rx() but can be called in IRQ context |
| * (internally defers to a tasklet.) |
| * |
| * Calls to this function and ieee80211_rx() may not be mixed for a |
| * single hardware. |
| * |
| * @hw: the hardware this frame came in on |
| * @skb: the buffer to receive, owned by mac80211 after this call |
| * @status: status of this frame; the status pointer need not be valid |
| * after this function returns and is not freed by mac80211, |
| * it is recommended that it points to a stack area |
| */ |
| void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, |
| struct sk_buff *skb, |
| struct ieee80211_rx_status *status); |
| |
| /** |
| * ieee80211_tx_status - transmit status callback |
| * |
| * Call this function for all transmitted frames after they have been |
| * transmitted. It is permissible to not call this function for |
| * multicast frames but this can affect statistics. |
| * |
| * This function may not be called in IRQ context. Calls to this function |
| * for a single hardware must be synchronized against each other. Calls |
| * to this function and ieee80211_tx_status_irqsafe() may not be mixed |
| * for a single hardware. |
| * |
| * @hw: the hardware the frame was transmitted by |
| * @skb: the frame that was transmitted, owned by mac80211 after this call |
| */ |
| void ieee80211_tx_status(struct ieee80211_hw *hw, |
| struct sk_buff *skb); |
| |
| /** |
| * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback |
| * |
| * Like ieee80211_tx_status() but can be called in IRQ context |
| * (internally defers to a tasklet.) |
| * |
| * Calls to this function and ieee80211_tx_status() may not be mixed for a |
| * single hardware. |
| * |
| * @hw: the hardware the frame was transmitted by |
| * @skb: the frame that was transmitted, owned by mac80211 after this call |
| */ |
| void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| struct sk_buff *skb); |
| |
| /** |
| * ieee80211_beacon_get - beacon generation function |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * |
| * If the beacon frames are generated by the host system (i.e., not in |
| * hardware/firmware), the low-level driver uses this function to receive |
| * the next beacon frame from the 802.11 code. The low-level is responsible |
| * for calling this function before beacon data is needed (e.g., based on |
| * hardware interrupt). Returned skb is used only once and low-level driver |
| * is responsible for freeing it. |
| */ |
| struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif); |
| |
| /** |
| * ieee80211_rts_get - RTS frame generation function |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * @frame: pointer to the frame that is going to be protected by the RTS. |
| * @frame_len: the frame length (in octets). |
| * @frame_txctl: &struct ieee80211_tx_info of the frame. |
| * @rts: The buffer where to store the RTS frame. |
| * |
| * If the RTS frames are generated by the host system (i.e., not in |
| * hardware/firmware), the low-level driver uses this function to receive |
| * the next RTS frame from the 802.11 code. The low-level is responsible |
| * for calling this function before and RTS frame is needed. |
| */ |
| void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
| const void *frame, size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl, |
| struct ieee80211_rts *rts); |
| |
| /** |
| * ieee80211_rts_duration - Get the duration field for an RTS frame |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * @frame_len: the length of the frame that is going to be protected by the RTS. |
| * @frame_txctl: &struct ieee80211_tx_info of the frame. |
| * |
| * If the RTS is generated in firmware, but the host system must provide |
| * the duration field, the low-level driver uses this function to receive |
| * the duration field value in little-endian byteorder. |
| */ |
| __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl); |
| |
| /** |
| * ieee80211_ctstoself_get - CTS-to-self frame generation function |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * @frame: pointer to the frame that is going to be protected by the CTS-to-self. |
| * @frame_len: the frame length (in octets). |
| * @frame_txctl: &struct ieee80211_tx_info of the frame. |
| * @cts: The buffer where to store the CTS-to-self frame. |
| * |
| * If the CTS-to-self frames are generated by the host system (i.e., not in |
| * hardware/firmware), the low-level driver uses this function to receive |
| * the next CTS-to-self frame from the 802.11 code. The low-level is responsible |
| * for calling this function before and CTS-to-self frame is needed. |
| */ |
| void ieee80211_ctstoself_get(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| const void *frame, size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl, |
| struct ieee80211_cts *cts); |
| |
| /** |
| * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. |
| * @frame_txctl: &struct ieee80211_tx_info of the frame. |
| * |
| * If the CTS-to-self is generated in firmware, but the host system must provide |
| * the duration field, the low-level driver uses this function to receive |
| * the duration field value in little-endian byteorder. |
| */ |
| __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| size_t frame_len, |
| const struct ieee80211_tx_info *frame_txctl); |
| |
| /** |
| * ieee80211_generic_frame_duration - Calculate the duration field for a frame |
| * @hw: pointer obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * @frame_len: the length of the frame. |
| * @rate: the rate at which the frame is going to be transmitted. |
| * |
| * Calculate the duration field of some generic frame, given its |
| * length and transmission rate (in 100kbps). |
| */ |
| __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| size_t frame_len, |
| struct ieee80211_rate *rate); |
| |
| /** |
| * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * |
| * Function for accessing buffered broadcast and multicast frames. If |
| * hardware/firmware does not implement buffering of broadcast/multicast |
| * frames when power saving is used, 802.11 code buffers them in the host |
| * memory. The low-level driver uses this function to fetch next buffered |
| * frame. In most cases, this is used when generating beacon frame. This |
| * function returns a pointer to the next buffered skb or NULL if no more |
| * buffered frames are available. |
| * |
| * Note: buffered frames are returned only after DTIM beacon frame was |
| * generated with ieee80211_beacon_get() and the low-level driver must thus |
| * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns |
| * NULL if the previous generated beacon was not DTIM, so the low-level driver |
| * does not need to check for DTIM beacons separately and should be able to |
| * use common code for all beacons. |
| */ |
| struct sk_buff * |
| ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); |
| |
| /** |
| * ieee80211_get_hdrlen_from_skb - get header length from data |
| * |
| * Given an skb with a raw 802.11 header at the data pointer this function |
| * returns the 802.11 header length in bytes (not including encryption |
| * headers). If the data in the sk_buff is too short to contain a valid 802.11 |
| * header the function returns 0. |
| * |
| * @skb: the frame |
| */ |
| unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); |
| |
| /** |
| * ieee80211_hdrlen - get header length in bytes from frame control |
| * @fc: frame control field in little-endian format |
| */ |
| unsigned int ieee80211_hdrlen(__le16 fc); |
| |
| /** |
| * ieee80211_get_tkip_key - get a TKIP rc4 for skb |
| * |
| * This function computes a TKIP rc4 key for an skb. It computes |
| * a phase 1 key if needed (iv16 wraps around). This function is to |
| * be used by drivers which can do HW encryption but need to compute |
| * to phase 1/2 key in SW. |
| * |
| * @keyconf: the parameter passed with the set key |
| * @skb: the skb for which the key is needed |
| * @type: TBD |
| * @key: a buffer to which the key will be written |
| */ |
| void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, |
| struct sk_buff *skb, |
| enum ieee80211_tkip_key_type type, u8 *key); |
| /** |
| * ieee80211_wake_queue - wake specific queue |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @queue: queue number (counted from zero). |
| * |
| * Drivers should use this function instead of netif_wake_queue. |
| */ |
| void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); |
| |
| /** |
| * ieee80211_stop_queue - stop specific queue |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @queue: queue number (counted from zero). |
| * |
| * Drivers should use this function instead of netif_stop_queue. |
| */ |
| void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); |
| |
| /** |
| * ieee80211_queue_stopped - test status of the queue |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @queue: queue number (counted from zero). |
| * |
| * Drivers should use this function instead of netif_stop_queue. |
| */ |
| |
| int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); |
| |
| /** |
| * ieee80211_stop_queues - stop all queues |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * |
| * Drivers should use this function instead of netif_stop_queue. |
| */ |
| void ieee80211_stop_queues(struct ieee80211_hw *hw); |
| |
| /** |
| * ieee80211_wake_queues - wake all queues |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * |
| * Drivers should use this function instead of netif_wake_queue. |
| */ |
| void ieee80211_wake_queues(struct ieee80211_hw *hw); |
| |
| /** |
| * ieee80211_scan_completed - completed hardware scan |
| * |
| * When hardware scan offload is used (i.e. the hw_scan() callback is |
| * assigned) this function needs to be called by the driver to notify |
| * mac80211 that the scan finished. |
| * |
| * @hw: the hardware that finished the scan |
| * @aborted: set to true if scan was aborted |
| */ |
| void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); |
| |
| /** |
| * ieee80211_iterate_active_interfaces - iterate active interfaces |
| * |
| * This function iterates over the interfaces associated with a given |
| * hardware that are currently active and calls the callback for them. |
| * This function allows the iterator function to sleep, when the iterator |
| * function is atomic @ieee80211_iterate_active_interfaces_atomic can |
| * be used. |
| * |
| * @hw: the hardware struct of which the interfaces should be iterated over |
| * @iterator: the iterator function to call |
| * @data: first argument of the iterator function |
| */ |
| void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, |
| void (*iterator)(void *data, u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data); |
| |
| /** |
| * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces |
| * |
| * This function iterates over the interfaces associated with a given |
| * hardware that are currently active and calls the callback for them. |
| * This function requires the iterator callback function to be atomic, |
| * if that is not desired, use @ieee80211_iterate_active_interfaces instead. |
| * |
| * @hw: the hardware struct of which the interfaces should be iterated over |
| * @iterator: the iterator function to call, cannot sleep |
| * @data: first argument of the iterator function |
| */ |
| void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, |
| void (*iterator)(void *data, |
| u8 *mac, |
| struct ieee80211_vif *vif), |
| void *data); |
| |
| /** |
| * ieee80211_start_tx_ba_session - Start a tx Block Ack session. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient |
| * @tid: the TID to BA on. |
| * |
| * Return: success if addBA request was sent, failure otherwise |
| * |
| * Although mac80211/low level driver/user space application can estimate |
| * the need to start aggregation on a certain RA/TID, the session level |
| * will be managed by the mac80211. |
| */ |
| int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); |
| |
| /** |
| * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient. |
| * @tid: the TID to BA on. |
| * |
| * This function must be called by low level driver once it has |
| * finished with preparations for the BA session. |
| */ |
| void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); |
| |
| /** |
| * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient. |
| * @tid: the TID to BA on. |
| * |
| * This function must be called by low level driver once it has |
| * finished with preparations for the BA session. |
| * This version of the function is IRQ-safe. |
| */ |
| void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, |
| u16 tid); |
| |
| /** |
| * ieee80211_stop_tx_ba_session - Stop a Block Ack session. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient |
| * @tid: the TID to stop BA. |
| * @initiator: if indicates initiator DELBA frame will be sent. |
| * |
| * Return: error if no sta with matching da found, success otherwise |
| * |
| * Although mac80211/low level driver/user space application can estimate |
| * the need to stop aggregation on a certain RA/TID, the session level |
| * will be managed by the mac80211. |
| */ |
| int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, |
| u8 *ra, u16 tid, |
| enum ieee80211_back_parties initiator); |
| |
| /** |
| * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient. |
| * @tid: the desired TID to BA on. |
| * |
| * This function must be called by low level driver once it has |
| * finished with preparations for the BA session tear down. |
| */ |
| void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); |
| |
| /** |
| * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. |
| * @hw: pointer as obtained from ieee80211_alloc_hw(). |
| * @ra: receiver address of the BA session recipient. |
| * @tid: the desired TID to BA on. |
| * |
| * This function must be called by low level driver once it has |
| * finished with preparations for the BA session tear down. |
| * This version of the function is IRQ-safe. |
| */ |
| void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, |
| u16 tid); |
| |
| /** |
| * ieee80211_find_sta - find a station |
| * |
| * @hw: pointer as obtained from ieee80211_alloc_hw() |
| * @addr: station's address |
| * |
| * This function must be called under RCU lock and the |
| * resulting pointer is only valid under RCU lock as well. |
| */ |
| struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, |
| const u8 *addr); |
| |
| /** |
| * ieee80211_beacon_loss - inform hardware does not receive beacons |
| * |
| * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
| * |
| * When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and |
| * IEEE80211_CONF_PS is set, the driver needs to inform whenever the |
| * hardware is not receiving beacons with this function. |
| */ |
| void ieee80211_beacon_loss(struct ieee80211_vif *vif); |
| |
| /* Rate control API */ |
| |
| /** |
| * enum rate_control_changed - flags to indicate which parameter changed |
| * |
| * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have |
| * changed, rate control algorithm can update its internal state if needed. |
| */ |
| enum rate_control_changed { |
| IEEE80211_RC_HT_CHANGED = BIT(0) |
| }; |
| |
| /** |
| * struct ieee80211_tx_rate_control - rate control information for/from RC algo |
| * |
| * @hw: The hardware the algorithm is invoked for. |
| * @sband: The band this frame is being transmitted on. |
| * @bss_conf: the current BSS configuration |
| * @reported_rate: The rate control algorithm can fill this in to indicate |
| * which rate should be reported to userspace as the current rate and |
| * used for rate calculations in the mesh network. |
| * @rts: whether RTS will be used for this frame because it is longer than the |
| * RTS threshold |
| * @short_preamble: whether mac80211 will request short-preamble transmission |
| * if the selected rate supports it |
| * @max_rate_idx: user-requested maximum rate (not MCS for now) |
| * @skb: the skb that will be transmitted, the control information in it needs |
| * to be filled in |
| */ |
| struct ieee80211_tx_rate_control { |
| struct ieee80211_hw *hw; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_bss_conf *bss_conf; |
| struct sk_buff *skb; |
| struct ieee80211_tx_rate reported_rate; |
| bool rts, short_preamble; |
| u8 max_rate_idx; |
| }; |
| |
| struct rate_control_ops { |
| struct module *module; |
| const char *name; |
| void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); |
| void (*free)(void *priv); |
| |
| void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); |
| void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta, void *priv_sta); |
| void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta, |
| void *priv_sta, u32 changed); |
| void (*free_sta)(void *priv, struct ieee80211_sta *sta, |
| void *priv_sta); |
| |
| void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta, void *priv_sta, |
| struct sk_buff *skb); |
| void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
| struct ieee80211_tx_rate_control *txrc); |
| |
| void (*add_sta_debugfs)(void *priv, void *priv_sta, |
| struct dentry *dir); |
| void (*remove_sta_debugfs)(void *priv, void *priv_sta); |
| }; |
| |
| static inline int rate_supported(struct ieee80211_sta *sta, |
| enum ieee80211_band band, |
| int index) |
| { |
| return (sta == NULL || sta->supp_rates[band] & BIT(index)); |
| } |
| |
| static inline s8 |
| rate_lowest_index(struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta) |
| { |
| int i; |
| |
| for (i = 0; i < sband->n_bitrates; i++) |
| if (rate_supported(sta, sband->band, i)) |
| return i; |
| |
| /* warn when we cannot find a rate. */ |
| WARN_ON(1); |
| |
| return 0; |
| } |
| |
| |
| int ieee80211_rate_control_register(struct rate_control_ops *ops); |
| void ieee80211_rate_control_unregister(struct rate_control_ops *ops); |
| |
| static inline bool |
| conf_is_ht20(struct ieee80211_conf *conf) |
| { |
| return conf->channel_type == NL80211_CHAN_HT20; |
| } |
| |
| static inline bool |
| conf_is_ht40_minus(struct ieee80211_conf *conf) |
| { |
| return conf->channel_type == NL80211_CHAN_HT40MINUS; |
| } |
| |
| static inline bool |
| conf_is_ht40_plus(struct ieee80211_conf *conf) |
| { |
| return conf->channel_type == NL80211_CHAN_HT40PLUS; |
| } |
| |
| static inline bool |
| conf_is_ht40(struct ieee80211_conf *conf) |
| { |
| return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); |
| } |
| |
| static inline bool |
| conf_is_ht(struct ieee80211_conf *conf) |
| { |
| return conf->channel_type != NL80211_CHAN_NO_HT; |
| } |
| |
| #endif /* MAC80211_H */ |
