iwlwifi: add the MVM driver

Newer firmware revisions have a completely new
firmware API. This is the new driver for this
new API.

I've listed the people who directly contributed
code, but many others from various teams have
contributed in other ways.

Cc: Alexander Bondar <alexander.bondar@intel.com>
Cc: Amit Beka <amit.beka@intel.com>
Cc: Amnon Paz <amnonx.paz@intel.com>
Cc: Assaf Krauss <assaf.krauss@intel.com>
Cc: David Spinadel <david.spinadel@intel.com>
Cc: Dor Shaish <dor.shaish@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Eytan Lifshitz <eytan.lifshitz@intel.com>
Cc: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 580 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
new file mode 100644
index 000000000000..2677914bf0a6
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
@@ -0,0 +1,580 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ *
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * 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
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+#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_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_BA: this frame is a block ack
+ * @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_TXOP_PROT: protect frame with full TXOP protection
+ * @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_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_NEXT_FRAME: this frame includes information of the next frame
+ * @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_AGG_START: allow this frame to start aggregation
+ * @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_CTS_ONLY: send CTS only, no data after that
+ * @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_ACK                  = BIT(3),
+        TX_CMD_FLG_STA_RATE             = BIT(4),
+        TX_CMD_FLG_BA                   = BIT(5),
+        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_DIS               = BIT(12),
+        TX_CMD_FLG_SEQ_CTL              = BIT(13),
+        TX_CMD_FLG_MORE_FRAG            = BIT(14),
+        TX_CMD_FLG_NEXT_FRAME           = BIT(15),
+        TX_CMD_FLG_TSF                  = BIT(16),
+        TX_CMD_FLG_CALIB                = BIT(17),
+        TX_CMD_FLG_KEEP_SEQ_CTL         = BIT(18),
+        TX_CMD_FLG_AGG_START            = BIT(19),
+        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_CTS_ONLY             = BIT(24),
+        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 */
+
+/*
+ * 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_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
+ * @next_frame_len: same as len, but for next frame (0 if not applicable)
+ *      Used for fragmentation and bursting, but not in 11n aggregation.
+ * @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
+ * @driver_txop: duration od EDCA TXOP, in 32-usec units. Set this if not
+ *      specified by HCCA protocol
+ *
+ * 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;
+        /* DRAM_SCRATCH_API_U_VER_1 */
+        u8 try_cnt;
+        u8 btkill_cnt;
+        __le16 reserved;
+        __le32 rate_n_flags;
+        u8 sta_id;
+        u8 sec_ctl;
+        u8 initial_rate_index;
+        u8 reserved2;
+        u8 key[16];
+        __le16 next_frame_flags;
+        __le16 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 driver_txop;
+        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;
+        __le16 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;
+
+/**
+ * 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;
+}
+
+#endif /* __fw_api_tx_h__ */