/******************************************************************************
   *
   * This file is provided under a dual BSD/GPLv2 license.  When using or
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   *
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   *
   * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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   * This program is free software; you can redistribute it and/or modify
   * it under the terms of version 2 of the GNU General Public License as
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   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
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   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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   *
   * The full GNU General Public License is included in this distribution
   * in the file called COPYING.
   *
   * Contact Information:
   *  Intel Linux Wireless <ilw@linux.intel.com>
   * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   *
   * BSD LICENSE
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   * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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   *****************************************************************************/
  
  #ifndef __fw_api_tx_h__
  #define __fw_api_tx_h__
  
  /**
   * enum iwl_tx_flags - bitmasks for tx_flags in TX command
   * @TX_CMD_FLG_PROT_REQUIRE: use RTS or CTS-to-self to protect the frame
   * @TX_CMD_FLG_WRITE_TX_POWER: update current tx power value in the mgmt frame
   * @TX_CMD_FLG_ACK: expect ACK from receiving station
   * @TX_CMD_FLG_STA_RATE: use RS table with initial index from the TX command.
   *	Otherwise, use rate_n_flags from the TX command
   * @TX_CMD_FLG_BAR: this frame is a BA request, immediate BAR is expected
   *	Must set TX_CMD_FLG_ACK with this flag.
   * @TX_CMD_FLG_VHT_NDPA: mark frame is NDPA for VHT beamformer sequence
   * @TX_CMD_FLG_HT_NDPA: mark frame is NDPA for HT beamformer sequence
   * @TX_CMD_FLG_CSI_FDBK2HOST: mark to send feedback to host (only if good CRC)
   * @TX_CMD_FLG_BT_PRIO_POS: the position of the BT priority (bit 11 is ignored
   *	on old firmwares).
   * @TX_CMD_FLG_BT_DIS: disable BT priority for this frame
   * @TX_CMD_FLG_SEQ_CTL: set if FW should override the sequence control.
   *	Should be set for mgmt, non-QOS data, mcast, bcast and in scan command
   * @TX_CMD_FLG_MORE_FRAG: this frame is non-last MPDU
   * @TX_CMD_FLG_TSF: FW should calculate and insert TSF in the frame
   *	Should be set for beacons and probe responses
   * @TX_CMD_FLG_CALIB: activate PA TX power calibrations
   * @TX_CMD_FLG_KEEP_SEQ_CTL: if seq_ctl is set, don't increase inner seq count
   * @TX_CMD_FLG_MH_PAD: driver inserted 2 byte padding after MAC header.
   *	Should be set for 26/30 length MAC headers
   * @TX_CMD_FLG_RESP_TO_DRV: zero this if the response should go only to FW
   * @TX_CMD_FLG_CCMP_AGG: this frame uses CCMP for aggregation acceleration
   * @TX_CMD_FLG_TKIP_MIC_DONE: FW already performed TKIP MIC calculation
   * @TX_CMD_FLG_DUR: disable duration overwriting used in PS-Poll Assoc-id
   * @TX_CMD_FLG_FW_DROP: FW should mark frame to be dropped
   * @TX_CMD_FLG_EXEC_PAPD: execute PAPD
   * @TX_CMD_FLG_PAPD_TYPE: 0 for reference power, 1 for nominal power
   * @TX_CMD_FLG_HCCA_CHUNK: mark start of TSPEC chunk
   */
  enum iwl_tx_flags {
  	TX_CMD_FLG_PROT_REQUIRE		= BIT(0),
  	TX_CMD_FLG_WRITE_TX_POWER	= BIT(1),
  	TX_CMD_FLG_ACK			= BIT(3),
  	TX_CMD_FLG_STA_RATE		= BIT(4),
  	TX_CMD_FLG_BAR			= BIT(6),
  	TX_CMD_FLG_TXOP_PROT		= BIT(7),
  	TX_CMD_FLG_VHT_NDPA		= BIT(8),
  	TX_CMD_FLG_HT_NDPA		= BIT(9),
  	TX_CMD_FLG_CSI_FDBK2HOST	= BIT(10),
  	TX_CMD_FLG_BT_PRIO_POS		= 11,
  	TX_CMD_FLG_BT_DIS		= BIT(12),
  	TX_CMD_FLG_SEQ_CTL		= BIT(13),
  	TX_CMD_FLG_MORE_FRAG		= BIT(14),
  	TX_CMD_FLG_TSF			= BIT(16),
  	TX_CMD_FLG_CALIB		= BIT(17),
  	TX_CMD_FLG_KEEP_SEQ_CTL		= BIT(18),
  	TX_CMD_FLG_MH_PAD		= BIT(20),
  	TX_CMD_FLG_RESP_TO_DRV		= BIT(21),
  	TX_CMD_FLG_CCMP_AGG		= BIT(22),
  	TX_CMD_FLG_TKIP_MIC_DONE	= BIT(23),
  	TX_CMD_FLG_DUR			= BIT(25),
  	TX_CMD_FLG_FW_DROP		= BIT(26),
  	TX_CMD_FLG_EXEC_PAPD		= BIT(27),
  	TX_CMD_FLG_PAPD_TYPE		= BIT(28),
  	TX_CMD_FLG_HCCA_CHUNK		= BIT(31)
  }; /* TX_FLAGS_BITS_API_S_VER_1 */
  
  /**
   * enum iwl_tx_pm_timeouts - pm timeout values in TX command
   * @PM_FRAME_NONE: no need to suspend sleep mode
   * @PM_FRAME_MGMT: fw suspend sleep mode for 100TU
   * @PM_FRAME_ASSOC: fw suspend sleep mode for 10sec
   */
  enum iwl_tx_pm_timeouts {
  	PM_FRAME_NONE		= 0,
  	PM_FRAME_MGMT		= 2,
  	PM_FRAME_ASSOC		= 3,
  };
  
  /*
   * TX command security control
   */
  #define TX_CMD_SEC_WEP			0x01
  #define TX_CMD_SEC_CCM			0x02
  #define TX_CMD_SEC_TKIP			0x03
  #define TX_CMD_SEC_EXT			0x04
  #define TX_CMD_SEC_MSK			0x07
  #define TX_CMD_SEC_WEP_KEY_IDX_POS	6
  #define TX_CMD_SEC_WEP_KEY_IDX_MSK	0xc0
  #define TX_CMD_SEC_KEY128		0x08
  
  /* TODO: how does these values are OK with only 16 bit variable??? */
  /*
   * TX command next frame info
   *
   * bits 0:2 - security control (TX_CMD_SEC_*)
   * bit 3 - immediate ACK required
   * bit 4 - rate is taken from STA table
   * bit 5 - frame belongs to BA stream
   * bit 6 - immediate BA response expected
   * bit 7 - unused
   * bits 8:15 - Station ID
   * bits 16:31 - rate
   */
  #define TX_CMD_NEXT_FRAME_ACK_MSK		(0x8)
  #define TX_CMD_NEXT_FRAME_STA_RATE_MSK		(0x10)
  #define TX_CMD_NEXT_FRAME_BA_MSK		(0x20)
  #define TX_CMD_NEXT_FRAME_IMM_BA_RSP_MSK	(0x40)
  #define TX_CMD_NEXT_FRAME_FLAGS_MSK		(0xf8)
  #define TX_CMD_NEXT_FRAME_STA_ID_MSK		(0xff00)
  #define TX_CMD_NEXT_FRAME_STA_ID_POS		(8)
  #define TX_CMD_NEXT_FRAME_RATE_MSK		(0xffff0000)
  #define TX_CMD_NEXT_FRAME_RATE_POS		(16)
  
  /*
   * TX command Frame life time in us - to be written in pm_frame_timeout
   */
  #define TX_CMD_LIFE_TIME_INFINITE	0xFFFFFFFF
  #define TX_CMD_LIFE_TIME_DEFAULT	2000000 /* 2000 ms*/
  #define TX_CMD_LIFE_TIME_PROBE_RESP	40000 /* 40 ms */
  #define TX_CMD_LIFE_TIME_EXPIRED_FRAME	0
  
  /*
   * TID for non QoS frames - to be written in tid_tspec
   */
  #define IWL_TID_NON_QOS	IWL_MAX_TID_COUNT
  
  /*
   * Limits on the retransmissions - to be written in {data,rts}_retry_limit
   */
  #define IWL_DEFAULT_TX_RETRY			15
  #define IWL_MGMT_DFAULT_RETRY_LIMIT		3
  #define IWL_RTS_DFAULT_RETRY_LIMIT		60
  #define IWL_BAR_DFAULT_RETRY_LIMIT		60
  #define IWL_LOW_RETRY_LIMIT			7
  
  /* TODO: complete documentation for try_cnt and btkill_cnt */
  /**
   * struct iwl_tx_cmd - TX command struct to FW
   * ( TX_CMD = 0x1c )
   * @len: in bytes of the payload, see below for details
   * @tx_flags: combination of TX_CMD_FLG_*
   * @rate_n_flags: rate for *all* Tx attempts, if TX_CMD_FLG_STA_RATE_MSK is
   *	cleared. Combination of RATE_MCS_*
   * @sta_id: index of destination station in FW station table
   * @sec_ctl: security control, TX_CMD_SEC_*
   * @initial_rate_index: index into the the rate table for initial TX attempt.
   *	Applied if TX_CMD_FLG_STA_RATE_MSK is set, normally 0 for data frames.
   * @key: security key
   * @next_frame_flags: TX_CMD_SEC_* and TX_CMD_NEXT_FRAME_*
   * @life_time: frame life time (usecs??)
   * @dram_lsb_ptr: Physical address of scratch area in the command (try_cnt +
   *	btkill_cnd + reserved), first 32 bits. "0" disables usage.
   * @dram_msb_ptr: upper bits of the scratch physical address
   * @rts_retry_limit: max attempts for RTS
   * @data_retry_limit: max attempts to send the data packet
   * @tid_spec: TID/tspec
   * @pm_frame_timeout: PM TX frame timeout
   *
   * The byte count (both len and next_frame_len) includes MAC header
   * (24/26/30/32 bytes)
   * + 2 bytes pad if 26/30 header size
   * + 8 byte IV for CCM or TKIP (not used for WEP)
   * + Data payload
   * + 8-byte MIC (not used for CCM/WEP)
   * It does not include post-MAC padding, i.e.,
   * MIC (CCM) 8 bytes, ICV (WEP/TKIP/CKIP) 4 bytes, CRC 4 bytes.
   * Range of len: 14-2342 bytes.
   *
   * After the struct fields the MAC header is placed, plus any padding,
   * and then the actial payload.
   */
  struct iwl_tx_cmd {
  	__le16 len;
  	__le16 next_frame_len;
  	__le32 tx_flags;
  	struct {
  		u8 try_cnt;
  		u8 btkill_cnt;
  		__le16 reserved;
  	} scratch; /* DRAM_SCRATCH_API_U_VER_1 */
  	__le32 rate_n_flags;
  	u8 sta_id;
  	u8 sec_ctl;
  	u8 initial_rate_index;
  	u8 reserved2;
  	u8 key[16];
  	__le32 reserved3;
  	__le32 life_time;
  	__le32 dram_lsb_ptr;
  	u8 dram_msb_ptr;
  	u8 rts_retry_limit;
  	u8 data_retry_limit;
  	u8 tid_tspec;
  	__le16 pm_frame_timeout;
  	__le16 reserved4;
  	u8 payload[0];
  	struct ieee80211_hdr hdr[0];
  } __packed; /* TX_CMD_API_S_VER_3 */
  
  /*
   * TX response related data
   */
  
  /*
   * enum iwl_tx_status - status that is returned by the fw after attempts to Tx
   * @TX_STATUS_SUCCESS:
   * @TX_STATUS_DIRECT_DONE:
   * @TX_STATUS_POSTPONE_DELAY:
   * @TX_STATUS_POSTPONE_FEW_BYTES:
   * @TX_STATUS_POSTPONE_BT_PRIO:
   * @TX_STATUS_POSTPONE_QUIET_PERIOD:
   * @TX_STATUS_POSTPONE_CALC_TTAK:
   * @TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
   * @TX_STATUS_FAIL_SHORT_LIMIT:
   * @TX_STATUS_FAIL_LONG_LIMIT:
   * @TX_STATUS_FAIL_UNDERRUN:
   * @TX_STATUS_FAIL_DRAIN_FLOW:
   * @TX_STATUS_FAIL_RFKILL_FLUSH:
   * @TX_STATUS_FAIL_LIFE_EXPIRE:
   * @TX_STATUS_FAIL_DEST_PS:
   * @TX_STATUS_FAIL_HOST_ABORTED:
   * @TX_STATUS_FAIL_BT_RETRY:
   * @TX_STATUS_FAIL_STA_INVALID:
   * @TX_TATUS_FAIL_FRAG_DROPPED:
   * @TX_STATUS_FAIL_TID_DISABLE:
   * @TX_STATUS_FAIL_FIFO_FLUSHED:
   * @TX_STATUS_FAIL_SMALL_CF_POLL:
   * @TX_STATUS_FAIL_FW_DROP:
   * @TX_STATUS_FAIL_STA_COLOR_MISMATCH: mismatch between color of Tx cmd and
   *	STA table
   * @TX_FRAME_STATUS_INTERNAL_ABORT:
   * @TX_MODE_MSK:
   * @TX_MODE_NO_BURST:
   * @TX_MODE_IN_BURST_SEQ:
   * @TX_MODE_FIRST_IN_BURST:
   * @TX_QUEUE_NUM_MSK:
   *
   * Valid only if frame_count =1
   * TODO: complete documentation
   */
  enum iwl_tx_status {
  	TX_STATUS_MSK = 0x000000ff,
  	TX_STATUS_SUCCESS = 0x01,
  	TX_STATUS_DIRECT_DONE = 0x02,
  	/* postpone TX */
  	TX_STATUS_POSTPONE_DELAY = 0x40,
  	TX_STATUS_POSTPONE_FEW_BYTES = 0x41,
  	TX_STATUS_POSTPONE_BT_PRIO = 0x42,
  	TX_STATUS_POSTPONE_QUIET_PERIOD = 0x43,
  	TX_STATUS_POSTPONE_CALC_TTAK = 0x44,
  	/* abort TX */
  	TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY = 0x81,
  	TX_STATUS_FAIL_SHORT_LIMIT = 0x82,
  	TX_STATUS_FAIL_LONG_LIMIT = 0x83,
  	TX_STATUS_FAIL_UNDERRUN = 0x84,
  	TX_STATUS_FAIL_DRAIN_FLOW = 0x85,
  	TX_STATUS_FAIL_RFKILL_FLUSH = 0x86,
  	TX_STATUS_FAIL_LIFE_EXPIRE = 0x87,
  	TX_STATUS_FAIL_DEST_PS = 0x88,
  	TX_STATUS_FAIL_HOST_ABORTED = 0x89,
  	TX_STATUS_FAIL_BT_RETRY = 0x8a,
  	TX_STATUS_FAIL_STA_INVALID = 0x8b,
  	TX_STATUS_FAIL_FRAG_DROPPED = 0x8c,
  	TX_STATUS_FAIL_TID_DISABLE = 0x8d,
  	TX_STATUS_FAIL_FIFO_FLUSHED = 0x8e,
  	TX_STATUS_FAIL_SMALL_CF_POLL = 0x8f,
  	TX_STATUS_FAIL_FW_DROP = 0x90,
  	TX_STATUS_FAIL_STA_COLOR_MISMATCH = 0x91,
  	TX_STATUS_INTERNAL_ABORT = 0x92,
  	TX_MODE_MSK = 0x00000f00,
  	TX_MODE_NO_BURST = 0x00000000,
  	TX_MODE_IN_BURST_SEQ = 0x00000100,
  	TX_MODE_FIRST_IN_BURST = 0x00000200,
  	TX_QUEUE_NUM_MSK = 0x0001f000,
  	TX_NARROW_BW_MSK = 0x00060000,
  	TX_NARROW_BW_1DIV2 = 0x00020000,
  	TX_NARROW_BW_1DIV4 = 0x00040000,
  	TX_NARROW_BW_1DIV8 = 0x00060000,
  };
  
  /*
   * enum iwl_tx_agg_status - TX aggregation status
   * @AGG_TX_STATE_STATUS_MSK:
   * @AGG_TX_STATE_TRANSMITTED:
   * @AGG_TX_STATE_UNDERRUN:
   * @AGG_TX_STATE_BT_PRIO:
   * @AGG_TX_STATE_FEW_BYTES:
   * @AGG_TX_STATE_ABORT:
   * @AGG_TX_STATE_LAST_SENT_TTL:
   * @AGG_TX_STATE_LAST_SENT_TRY_CNT:
   * @AGG_TX_STATE_LAST_SENT_BT_KILL:
   * @AGG_TX_STATE_SCD_QUERY:
   * @AGG_TX_STATE_TEST_BAD_CRC32:
   * @AGG_TX_STATE_RESPONSE:
   * @AGG_TX_STATE_DUMP_TX:
   * @AGG_TX_STATE_DELAY_TX:
   * @AGG_TX_STATE_TRY_CNT_MSK: Retry count for 1st frame in aggregation (retries
   *	occur if tx failed for this frame when it was a member of a previous
   *	aggregation block). If rate scaling is used, retry count indicates the
   *	rate table entry used for all frames in the new agg.
   *@ AGG_TX_STATE_SEQ_NUM_MSK: Command ID and sequence number of Tx command for
   *	this frame
   *
   * TODO: complete documentation
   */
  enum iwl_tx_agg_status {
  	AGG_TX_STATE_STATUS_MSK = 0x00fff,
  	AGG_TX_STATE_TRANSMITTED = 0x000,
  	AGG_TX_STATE_UNDERRUN = 0x001,
  	AGG_TX_STATE_BT_PRIO = 0x002,
  	AGG_TX_STATE_FEW_BYTES = 0x004,
  	AGG_TX_STATE_ABORT = 0x008,
  	AGG_TX_STATE_LAST_SENT_TTL = 0x010,
  	AGG_TX_STATE_LAST_SENT_TRY_CNT = 0x020,
  	AGG_TX_STATE_LAST_SENT_BT_KILL = 0x040,
  	AGG_TX_STATE_SCD_QUERY = 0x080,
  	AGG_TX_STATE_TEST_BAD_CRC32 = 0x0100,
  	AGG_TX_STATE_RESPONSE = 0x1ff,
  	AGG_TX_STATE_DUMP_TX = 0x200,
  	AGG_TX_STATE_DELAY_TX = 0x400,
  	AGG_TX_STATE_TRY_CNT_POS = 12,
  	AGG_TX_STATE_TRY_CNT_MSK = 0xf << AGG_TX_STATE_TRY_CNT_POS,
  };
  
  #define AGG_TX_STATE_LAST_SENT_MSK  (AGG_TX_STATE_LAST_SENT_TTL| \
  				     AGG_TX_STATE_LAST_SENT_TRY_CNT| \
  				     AGG_TX_STATE_LAST_SENT_BT_KILL)
  
  /*
   * The mask below describes a status where we are absolutely sure that the MPDU
   * wasn't sent. For BA/Underrun we cannot be that sure. All we know that we've
   * written the bytes to the TXE, but we know nothing about what the DSP did.
   */
  #define AGG_TX_STAT_FRAME_NOT_SENT (AGG_TX_STATE_FEW_BYTES | \
  				    AGG_TX_STATE_ABORT | \
  				    AGG_TX_STATE_SCD_QUERY)
  
  /*
   * REPLY_TX = 0x1c (response)
   *
   * This response may be in one of two slightly different formats, indicated
   * by the frame_count field:
   *
   * 1)	No aggregation (frame_count == 1).  This reports Tx results for a single
   *	frame. Multiple attempts, at various bit rates, may have been made for
   *	this frame.
   *
   * 2)	Aggregation (frame_count > 1).  This reports Tx results for two or more
   *	frames that used block-acknowledge.  All frames were transmitted at
   *	same rate. Rate scaling may have been used if first frame in this new
   *	agg block failed in previous agg block(s).
   *
   *	Note that, for aggregation, ACK (block-ack) status is not delivered
   *	here; block-ack has not been received by the time the device records
   *	this status.
   *	This status relates to reasons the tx might have been blocked or aborted
   *	within the device, rather than whether it was received successfully by
   *	the destination station.
   */
  
  /**
   * struct agg_tx_status - per packet TX aggregation status
   * @status: enum iwl_tx_agg_status
   * @sequence: Sequence # for this frame's Tx cmd (not SSN!)
   */
  struct agg_tx_status {
  	__le16 status;
  	__le16 sequence;
  } __packed;
  
  /*
   * definitions for initial rate index field
   * bits [3:0] initial rate index
   * bits [6:4] rate table color, used for the initial rate
   * bit-7 invalid rate indication
   */
  #define TX_RES_INIT_RATE_INDEX_MSK 0x0f
  #define TX_RES_RATE_TABLE_COLOR_MSK 0x70
  #define TX_RES_INV_RATE_INDEX_MSK 0x80
  
  #define IWL_MVM_TX_RES_GET_TID(_ra_tid) ((_ra_tid) & 0x0f)
  #define IWL_MVM_TX_RES_GET_RA(_ra_tid) ((_ra_tid) >> 4)
  
  /**
   * struct iwl_mvm_tx_resp - notifies that fw is TXing a packet
   * ( REPLY_TX = 0x1c )
   * @frame_count: 1 no aggregation, >1 aggregation
   * @bt_kill_count: num of times blocked by bluetooth (unused for agg)
   * @failure_rts: num of failures due to unsuccessful RTS
   * @failure_frame: num failures due to no ACK (unused for agg)
   * @initial_rate: for non-agg: rate of the successful Tx. For agg: rate of the
   *	Tx of all the batch. RATE_MCS_*
   * @wireless_media_time: for non-agg: RTS + CTS + frame tx attempts time + ACK.
   *	for agg: RTS + CTS + aggregation tx time + block-ack time.
   *	in usec.
   * @pa_status: tx power info
   * @pa_integ_res_a: tx power info
   * @pa_integ_res_b: tx power info
   * @pa_integ_res_c: tx power info
   * @measurement_req_id: tx power info
   * @tfd_info: TFD information set by the FH
   * @seq_ctl: sequence control from the Tx cmd
   * @byte_cnt: byte count from the Tx cmd
   * @tlc_info: TLC rate info
   * @ra_tid: bits [3:0] = ra, bits [7:4] = tid
   * @frame_ctrl: frame control
   * @status: for non-agg:  frame status TX_STATUS_*
   *	for agg: status of 1st frame, AGG_TX_STATE_*; other frame status fields
   *	follow this one, up to frame_count.
   *
   * After the array of statuses comes the SSN of the SCD. Look at
   * %iwl_mvm_get_scd_ssn for more details.
   */
  struct iwl_mvm_tx_resp {
  	u8 frame_count;
  	u8 bt_kill_count;
  	u8 failure_rts;
  	u8 failure_frame;
  	__le32 initial_rate;
  	__le16 wireless_media_time;
  
  	u8 pa_status;
  	u8 pa_integ_res_a[3];
  	u8 pa_integ_res_b[3];
  	u8 pa_integ_res_c[3];
  	__le16 measurement_req_id;
  	u8 reduced_tpc;
  	u8 reserved;
  
  	__le32 tfd_info;
  	__le16 seq_ctl;
  	__le16 byte_cnt;
  	u8 tlc_info;
  	u8 ra_tid;
  	__le16 frame_ctrl;
  
  	struct agg_tx_status status;
  } __packed; /* TX_RSP_API_S_VER_3 */
  
  /**
   * struct iwl_mvm_ba_notif - notifies about reception of BA
   * ( BA_NOTIF = 0xc5 )
   * @sta_addr_lo32: lower 32 bits of the MAC address
   * @sta_addr_hi16: upper 16 bits of the MAC address
   * @sta_id: Index of recipient (BA-sending) station in fw's station table
   * @tid: tid of the session
   * @seq_ctl:
   * @bitmap: the bitmap of the BA notification as seen in the air
   * @scd_flow: the tx queue this BA relates to
   * @scd_ssn: the index of the last contiguously sent packet
   * @txed: number of Txed frames in this batch
   * @txed_2_done: number of Acked frames in this batch
   */
  struct iwl_mvm_ba_notif {
  	__le32 sta_addr_lo32;
  	__le16 sta_addr_hi16;
  	__le16 reserved;
  
  	u8 sta_id;
  	u8 tid;
  	__le16 seq_ctl;
  	__le64 bitmap;
  	__le16 scd_flow;
  	__le16 scd_ssn;
  	u8 txed;
  	u8 txed_2_done;
  	__le16 reserved1;
  } __packed;
  
  /*
   * struct iwl_mac_beacon_cmd - beacon template command
   * @tx: the tx commands associated with the beacon frame
   * @template_id: currently equal to the mac context id of the coresponding
   *  mac.
   * @tim_idx: the offset of the tim IE in the beacon
   * @tim_size: the length of the tim IE
   * @frame: the template of the beacon frame
   */
  struct iwl_mac_beacon_cmd {
  	struct iwl_tx_cmd tx;
  	__le32 template_id;
  	__le32 tim_idx;
  	__le32 tim_size;
  	struct ieee80211_hdr frame[0];
  } __packed;
  
  struct iwl_beacon_notif {
  	struct iwl_mvm_tx_resp beacon_notify_hdr;
  	__le64 tsf;
  	__le32 ibss_mgr_status;
  } __packed;
  
  /**
   * struct iwl_extended_beacon_notif - notifies about beacon transmission
   * @beacon_notify_hdr: tx response command associated with the beacon
   * @tsf: last beacon tsf
   * @ibss_mgr_status: whether IBSS is manager
   * @gp2: last beacon time in gp2
   */
  struct iwl_extended_beacon_notif {
  	struct iwl_mvm_tx_resp beacon_notify_hdr;
  	__le64 tsf;
  	__le32 ibss_mgr_status;
  	__le32 gp2;
  } __packed; /* BEACON_NTFY_API_S_VER_5 */
  
  /**
   * enum iwl_dump_control - dump (flush) control flags
   * @DUMP_TX_FIFO_FLUSH: Dump MSDUs until the the FIFO is empty
   *	and the TFD queues are empty.
   */
  enum iwl_dump_control {
  	DUMP_TX_FIFO_FLUSH	= BIT(1),
  };
  
  /**
   * struct iwl_tx_path_flush_cmd -- queue/FIFO flush command
   * @queues_ctl: bitmap of queues to flush
   * @flush_ctl: control flags
   * @reserved: reserved
   */
  struct iwl_tx_path_flush_cmd {
  	__le32 queues_ctl;
  	__le16 flush_ctl;
  	__le16 reserved;
  } __packed; /* TX_PATH_FLUSH_CMD_API_S_VER_1 */
  
  /**
   * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
   * @tx_resp: the Tx response from the fw (agg or non-agg)
   *
   * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
   * it can't know that everything will go well until the end of the AMPDU, it
   * can't know in advance the number of MPDUs that will be sent in the current
   * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
   * Hence, it can't know in advance what the SSN of the SCD will be at the end
   * of the batch. This is why the SSN of the SCD is written at the end of the
   * whole struct at a variable offset. This function knows how to cope with the
   * variable offset and returns the SSN of the SCD.
   */
  static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm_tx_resp *tx_resp)
  {
  	return le32_to_cpup((__le32 *)&tx_resp->status +
  			    tx_resp->frame_count) & 0xfff;
  }
  
  /**
   * struct iwl_scd_txq_cfg_cmd - New txq hw scheduler config command
   * @token:
   * @sta_id: station id
   * @tid:
   * @scd_queue: scheduler queue to confiug
   * @enable: 1 queue enable, 0 queue disable
   * @aggregate: 1 aggregated queue, 0 otherwise
   * @tx_fifo: %enum iwl_mvm_tx_fifo
   * @window: BA window size
   * @ssn: SSN for the BA agreement
   */
  struct iwl_scd_txq_cfg_cmd {
  	u8 token;
  	u8 sta_id;
  	u8 tid;
  	u8 scd_queue;
  	u8 enable;
  	u8 aggregate;
  	u8 tx_fifo;
  	u8 window;
  	__le16 ssn;
  	__le16 reserved;
  } __packed; /* SCD_QUEUE_CFG_CMD_API_S_VER_1 */
  
  /**
   * struct iwl_scd_txq_cfg_rsp
   * @token: taken from the command
   * @sta_id: station id from the command
   * @tid: tid from the command
   * @scd_queue: scd_queue from the command
   */
  struct iwl_scd_txq_cfg_rsp {
  	u8 token;
  	u8 sta_id;
  	u8 tid;
  	u8 scd_queue;
  } __packed; /* SCD_QUEUE_CFG_RSP_API_S_VER_1 */
  
  #endif /* __fw_api_tx_h__ */