cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mac.h (12750B)


      1/* SPDX-License-Identifier: ISC */
      2/* Copyright (C) 2020 MediaTek Inc. */
      3
      4#ifndef __MT7915_MAC_H
      5#define __MT7915_MAC_H
      6
      7#define MT_CT_PARSE_LEN			72
      8#define MT_CT_DMA_BUF_NUM		2
      9
     10#define MT_RXD0_LENGTH			GENMASK(15, 0)
     11#define MT_RXD0_PKT_TYPE		GENMASK(31, 27)
     12
     13#define MT_RXD0_NORMAL_ETH_TYPE_OFS	GENMASK(22, 16)
     14#define MT_RXD0_NORMAL_IP_SUM		BIT(23)
     15#define MT_RXD0_NORMAL_UDP_TCP_SUM	BIT(24)
     16
     17enum rx_pkt_type {
     18	PKT_TYPE_TXS,
     19	PKT_TYPE_TXRXV,
     20	PKT_TYPE_NORMAL,
     21	PKT_TYPE_RX_DUP_RFB,
     22	PKT_TYPE_RX_TMR,
     23	PKT_TYPE_RETRIEVE,
     24	PKT_TYPE_TXRX_NOTIFY,
     25	PKT_TYPE_RX_EVENT,
     26	PKT_TYPE_RX_FW_MONITOR = 0x0c,
     27	PKT_TYPE_TXRX_NOTIFY_V0 = 0x18,
     28};
     29
     30/* RXD DW1 */
     31#define MT_RXD1_NORMAL_WLAN_IDX		GENMASK(9, 0)
     32#define MT_RXD1_NORMAL_GROUP_1		BIT(11)
     33#define MT_RXD1_NORMAL_GROUP_2		BIT(12)
     34#define MT_RXD1_NORMAL_GROUP_3		BIT(13)
     35#define MT_RXD1_NORMAL_GROUP_4		BIT(14)
     36#define MT_RXD1_NORMAL_GROUP_5		BIT(15)
     37#define MT_RXD1_NORMAL_SEC_MODE		GENMASK(20, 16)
     38#define MT_RXD1_NORMAL_KEY_ID		GENMASK(22, 21)
     39#define MT_RXD1_NORMAL_CM		BIT(23)
     40#define MT_RXD1_NORMAL_CLM		BIT(24)
     41#define MT_RXD1_NORMAL_ICV_ERR		BIT(25)
     42#define MT_RXD1_NORMAL_TKIP_MIC_ERR	BIT(26)
     43#define MT_RXD1_NORMAL_FCS_ERR		BIT(27)
     44#define MT_RXD1_NORMAL_BAND_IDX		BIT(28)
     45#define MT_RXD1_NORMAL_SPP_EN		BIT(29)
     46#define MT_RXD1_NORMAL_ADD_OM		BIT(30)
     47#define MT_RXD1_NORMAL_SEC_DONE		BIT(31)
     48
     49/* RXD DW2 */
     50#define MT_RXD2_NORMAL_BSSID		GENMASK(5, 0)
     51#define MT_RXD2_NORMAL_CO_ANT		BIT(6)
     52#define MT_RXD2_NORMAL_BF_CQI		BIT(7)
     53#define MT_RXD2_NORMAL_MAC_HDR_LEN	GENMASK(12, 8)
     54#define MT_RXD2_NORMAL_HDR_TRANS	BIT(13)
     55#define MT_RXD2_NORMAL_HDR_OFFSET	GENMASK(15, 14)
     56#define MT_RXD2_NORMAL_TID		GENMASK(19, 16)
     57#define MT_RXD2_NORMAL_MU_BAR		BIT(21)
     58#define MT_RXD2_NORMAL_SW_BIT		BIT(22)
     59#define MT_RXD2_NORMAL_AMSDU_ERR	BIT(23)
     60#define MT_RXD2_NORMAL_MAX_LEN_ERROR	BIT(24)
     61#define MT_RXD2_NORMAL_HDR_TRANS_ERROR	BIT(25)
     62#define MT_RXD2_NORMAL_INT_FRAME	BIT(26)
     63#define MT_RXD2_NORMAL_FRAG		BIT(27)
     64#define MT_RXD2_NORMAL_NULL_FRAME	BIT(28)
     65#define MT_RXD2_NORMAL_NDATA		BIT(29)
     66#define MT_RXD2_NORMAL_NON_AMPDU	BIT(30)
     67#define MT_RXD2_NORMAL_BF_REPORT	BIT(31)
     68
     69/* RXD DW3 */
     70#define MT_RXD3_NORMAL_RXV_SEQ		GENMASK(7, 0)
     71#define MT_RXD3_NORMAL_CH_FREQ		GENMASK(15, 8)
     72#define MT_RXD3_NORMAL_ADDR_TYPE	GENMASK(17, 16)
     73#define MT_RXD3_NORMAL_U2M		BIT(0)
     74#define MT_RXD3_NORMAL_HTC_VLD		BIT(0)
     75#define MT_RXD3_NORMAL_TSF_COMPARE_LOSS	BIT(19)
     76#define MT_RXD3_NORMAL_BEACON_MC	BIT(20)
     77#define MT_RXD3_NORMAL_BEACON_UC	BIT(21)
     78#define MT_RXD3_NORMAL_AMSDU		BIT(22)
     79#define MT_RXD3_NORMAL_MESH		BIT(23)
     80#define MT_RXD3_NORMAL_MHCP		BIT(24)
     81#define MT_RXD3_NORMAL_NO_INFO_WB	BIT(25)
     82#define MT_RXD3_NORMAL_DISABLE_RX_HDR_TRANS	BIT(26)
     83#define MT_RXD3_NORMAL_POWER_SAVE_STAT	BIT(27)
     84#define MT_RXD3_NORMAL_MORE		BIT(28)
     85#define MT_RXD3_NORMAL_UNWANT		BIT(29)
     86#define MT_RXD3_NORMAL_RX_DROP		BIT(30)
     87#define MT_RXD3_NORMAL_VLAN2ETH		BIT(31)
     88
     89/* RXD DW4 */
     90#define MT_RXD4_NORMAL_PAYLOAD_FORMAT	GENMASK(1, 0)
     91#define MT_RXD4_FIRST_AMSDU_FRAME	GENMASK(1, 0)
     92#define MT_RXD4_MID_AMSDU_FRAME		BIT(1)
     93#define MT_RXD4_LAST_AMSDU_FRAME	BIT(0)
     94
     95#define MT_RXD4_NORMAL_PATTERN_DROP	BIT(9)
     96#define MT_RXD4_NORMAL_CLS		BIT(10)
     97#define MT_RXD4_NORMAL_OFLD		GENMASK(12, 11)
     98#define MT_RXD4_NORMAL_MAGIC_PKT	BIT(13)
     99#define MT_RXD4_NORMAL_WOL		GENMASK(18, 14)
    100#define MT_RXD4_NORMAL_CLS_BITMAP	GENMASK(28, 19)
    101#define MT_RXD3_NORMAL_PF_MODE		BIT(29)
    102#define MT_RXD3_NORMAL_PF_STS		GENMASK(31, 30)
    103
    104#define MT_RXV_HDR_BAND_IDX		BIT(24)
    105
    106/* RXD GROUP4 */
    107#define MT_RXD6_FRAME_CONTROL		GENMASK(15, 0)
    108#define MT_RXD6_TA_LO			GENMASK(31, 16)
    109
    110#define MT_RXD7_TA_HI			GENMASK(31, 0)
    111
    112#define MT_RXD8_SEQ_CTRL		GENMASK(15, 0)
    113#define MT_RXD8_QOS_CTL			GENMASK(31, 16)
    114
    115#define MT_RXD9_HT_CONTROL		GENMASK(31, 0)
    116
    117/* P-RXV */
    118#define MT_PRXV_TX_RATE			GENMASK(6, 0)
    119#define MT_PRXV_TX_DCM			BIT(4)
    120#define MT_PRXV_TX_ER_SU_106T		BIT(5)
    121#define MT_PRXV_NSTS			GENMASK(9, 7)
    122#define MT_PRXV_TXBF			BIT(10)
    123#define MT_PRXV_HT_AD_CODE		BIT(11)
    124#define MT_PRXV_HE_RU_ALLOC_L		GENMASK(31, 28)
    125#define MT_PRXV_HE_RU_ALLOC_H		GENMASK(3, 0)
    126#define MT_PRXV_RCPI3			GENMASK(31, 24)
    127#define MT_PRXV_RCPI2			GENMASK(23, 16)
    128#define MT_PRXV_RCPI1			GENMASK(15, 8)
    129#define MT_PRXV_RCPI0			GENMASK(7, 0)
    130#define MT_PRXV_HT_SHORT_GI		GENMASK(16, 15)
    131#define MT_PRXV_HT_STBC			GENMASK(23, 22)
    132#define MT_PRXV_TX_MODE			GENMASK(27, 24)
    133#define MT_PRXV_FRAME_MODE		GENMASK(14, 12)
    134#define MT_PRXV_DCM			BIT(17)
    135#define MT_PRXV_NUM_RX			BIT(20, 18)
    136
    137/* C-RXV */
    138#define MT_CRXV_HT_STBC			GENMASK(1, 0)
    139#define MT_CRXV_TX_MODE			GENMASK(7, 4)
    140#define MT_CRXV_FRAME_MODE		GENMASK(10, 8)
    141#define MT_CRXV_HT_SHORT_GI		GENMASK(14, 13)
    142#define MT_CRXV_HE_LTF_SIZE		GENMASK(18, 17)
    143#define MT_CRXV_HE_LDPC_EXT_SYM		BIT(20)
    144#define MT_CRXV_HE_PE_DISAMBIG		BIT(23)
    145#define MT_CRXV_HE_NUM_USER		GENMASK(30, 24)
    146#define MT_CRXV_HE_UPLINK		BIT(31)
    147#define MT_CRXV_HE_RU0			GENMASK(7, 0)
    148#define MT_CRXV_HE_RU1			GENMASK(15, 8)
    149#define MT_CRXV_HE_RU2			GENMASK(23, 16)
    150#define MT_CRXV_HE_RU3			GENMASK(31, 24)
    151
    152#define MT_CRXV_HE_MU_AID		GENMASK(30, 20)
    153
    154#define MT_CRXV_HE_SR_MASK		GENMASK(11, 8)
    155#define MT_CRXV_HE_SR1_MASK		GENMASK(16, 12)
    156#define MT_CRXV_HE_SR2_MASK             GENMASK(20, 17)
    157#define MT_CRXV_HE_SR3_MASK             GENMASK(24, 21)
    158
    159#define MT_CRXV_HE_BSS_COLOR		GENMASK(5, 0)
    160#define MT_CRXV_HE_TXOP_DUR		GENMASK(12, 6)
    161#define MT_CRXV_HE_BEAM_CHNG		BIT(13)
    162#define MT_CRXV_HE_DOPPLER		BIT(16)
    163
    164#define MT_CRXV_SNR		GENMASK(18, 13)
    165#define MT_CRXV_FOE_LO		GENMASK(31, 19)
    166#define MT_CRXV_FOE_HI		GENMASK(6, 0)
    167#define MT_CRXV_FOE_SHIFT	13
    168
    169enum tx_header_format {
    170	MT_HDR_FORMAT_802_3,
    171	MT_HDR_FORMAT_CMD,
    172	MT_HDR_FORMAT_802_11,
    173	MT_HDR_FORMAT_802_11_EXT,
    174};
    175
    176enum tx_pkt_type {
    177	MT_TX_TYPE_CT,
    178	MT_TX_TYPE_SF,
    179	MT_TX_TYPE_CMD,
    180	MT_TX_TYPE_FW,
    181};
    182
    183enum tx_port_idx {
    184	MT_TX_PORT_IDX_LMAC,
    185	MT_TX_PORT_IDX_MCU
    186};
    187
    188enum tx_mcu_port_q_idx {
    189	MT_TX_MCU_PORT_RX_Q0 = 0x20,
    190	MT_TX_MCU_PORT_RX_Q1,
    191	MT_TX_MCU_PORT_RX_Q2,
    192	MT_TX_MCU_PORT_RX_Q3,
    193	MT_TX_MCU_PORT_RX_FWDL = 0x3e
    194};
    195
    196#define MT_CT_INFO_APPLY_TXD		BIT(0)
    197#define MT_CT_INFO_COPY_HOST_TXD_ALL	BIT(1)
    198#define MT_CT_INFO_MGMT_FRAME		BIT(2)
    199#define MT_CT_INFO_NONE_CIPHER_FRAME	BIT(3)
    200#define MT_CT_INFO_HSR2_TX		BIT(4)
    201#define MT_CT_INFO_FROM_HOST		BIT(7)
    202
    203#define MT_TXD_SIZE			(8 * 4)
    204
    205#define MT_TXD0_Q_IDX			GENMASK(31, 25)
    206#define MT_TXD0_PKT_FMT			GENMASK(24, 23)
    207#define MT_TXD0_ETH_TYPE_OFFSET		GENMASK(22, 16)
    208#define MT_TXD0_TX_BYTES		GENMASK(15, 0)
    209
    210#define MT_TXD1_LONG_FORMAT		BIT(31)
    211#define MT_TXD1_TGID			BIT(30)
    212#define MT_TXD1_OWN_MAC			GENMASK(29, 24)
    213#define MT_TXD1_AMSDU			BIT(23)
    214#define MT_TXD1_TID			GENMASK(22, 20)
    215#define MT_TXD1_HDR_PAD			GENMASK(19, 18)
    216#define MT_TXD1_HDR_FORMAT		GENMASK(17, 16)
    217#define MT_TXD1_HDR_INFO		GENMASK(15, 11)
    218#define MT_TXD1_ETH_802_3		BIT(15)
    219#define MT_TXD1_VTA			BIT(10)
    220#define MT_TXD1_WLAN_IDX		GENMASK(9, 0)
    221
    222#define MT_TXD2_FIX_RATE		BIT(31)
    223#define MT_TXD2_FIXED_RATE		BIT(30)
    224#define MT_TXD2_POWER_OFFSET		GENMASK(29, 24)
    225#define MT_TXD2_MAX_TX_TIME		GENMASK(23, 16)
    226#define MT_TXD2_FRAG			GENMASK(15, 14)
    227#define MT_TXD2_HTC_VLD			BIT(13)
    228#define MT_TXD2_DURATION		BIT(12)
    229#define MT_TXD2_BIP			BIT(11)
    230#define MT_TXD2_MULTICAST		BIT(10)
    231#define MT_TXD2_RTS			BIT(9)
    232#define MT_TXD2_SOUNDING		BIT(8)
    233#define MT_TXD2_NDPA			BIT(7)
    234#define MT_TXD2_NDP			BIT(6)
    235#define MT_TXD2_FRAME_TYPE		GENMASK(5, 4)
    236#define MT_TXD2_SUB_TYPE		GENMASK(3, 0)
    237
    238#define MT_TXD3_SN_VALID		BIT(31)
    239#define MT_TXD3_PN_VALID		BIT(30)
    240#define MT_TXD3_SW_POWER_MGMT		BIT(29)
    241#define MT_TXD3_BA_DISABLE		BIT(28)
    242#define MT_TXD3_SEQ			GENMASK(27, 16)
    243#define MT_TXD3_REM_TX_COUNT		GENMASK(15, 11)
    244#define MT_TXD3_TX_COUNT		GENMASK(10, 6)
    245#define MT_TXD3_TIMING_MEASURE		BIT(5)
    246#define MT_TXD3_DAS			BIT(4)
    247#define MT_TXD3_EEOSP			BIT(3)
    248#define MT_TXD3_EMRD			BIT(2)
    249#define MT_TXD3_PROTECT_FRAME		BIT(1)
    250#define MT_TXD3_NO_ACK			BIT(0)
    251
    252#define MT_TXD4_PN_LOW			GENMASK(31, 0)
    253
    254#define MT_TXD5_PN_HIGH			GENMASK(31, 16)
    255#define MT_TXD5_MD			BIT(15)
    256#define MT_TXD5_ADD_BA			BIT(14)
    257#define MT_TXD5_TX_STATUS_HOST		BIT(10)
    258#define MT_TXD5_TX_STATUS_MCU		BIT(9)
    259#define MT_TXD5_TX_STATUS_FMT		BIT(8)
    260#define MT_TXD5_PID			GENMASK(7, 0)
    261
    262#define MT_TXD6_TX_IBF			BIT(31)
    263#define MT_TXD6_TX_EBF			BIT(30)
    264#define MT_TXD6_TX_RATE			GENMASK(29, 16)
    265#define MT_TXD6_SGI			GENMASK(15, 14)
    266#define MT_TXD6_HELTF			GENMASK(13, 12)
    267#define MT_TXD6_LDPC			BIT(11)
    268#define MT_TXD6_SPE_ID_IDX		BIT(10)
    269#define MT_TXD6_ANT_ID			GENMASK(7, 4)
    270#define MT_TXD6_DYN_BW			BIT(3)
    271#define MT_TXD6_FIXED_BW		BIT(2)
    272#define MT_TXD6_BW			GENMASK(1, 0)
    273
    274#define MT_TXD7_TXD_LEN			GENMASK(31, 30)
    275#define MT_TXD7_UDP_TCP_SUM		BIT(29)
    276#define MT_TXD7_IP_SUM			BIT(28)
    277
    278#define MT_TXD7_TYPE			GENMASK(21, 20)
    279#define MT_TXD7_SUB_TYPE		GENMASK(19, 16)
    280
    281#define MT_TXD7_PSE_FID			GENMASK(27, 16)
    282#define MT_TXD7_SPE_IDX			GENMASK(15, 11)
    283#define MT_TXD7_HW_AMSDU		BIT(10)
    284#define MT_TXD7_TX_TIME			GENMASK(9, 0)
    285
    286#define MT_TX_RATE_STBC			BIT(13)
    287#define MT_TX_RATE_NSS			GENMASK(12, 10)
    288#define MT_TX_RATE_MODE			GENMASK(9, 6)
    289#define MT_TX_RATE_SU_EXT_TONE		BIT(5)
    290#define MT_TX_RATE_DCM			BIT(4)
    291/* VHT/HE only use bits 0-3 */
    292#define MT_TX_RATE_IDX			GENMASK(5, 0)
    293
    294#define MT_TXP_MAX_BUF_NUM		6
    295
    296struct mt7915_txp {
    297	__le16 flags;
    298	__le16 token;
    299	u8 bss_idx;
    300	__le16 rept_wds_wcid;
    301	u8 nbuf;
    302	__le32 buf[MT_TXP_MAX_BUF_NUM];
    303	__le16 len[MT_TXP_MAX_BUF_NUM];
    304} __packed __aligned(4);
    305
    306struct mt7915_tx_free {
    307	__le16 rx_byte_cnt;
    308	__le16 ctrl;
    309	__le32 txd;
    310	__le32 info[];
    311} __packed __aligned(4);
    312
    313#define MT_TX_FREE_VER			GENMASK(18, 16)
    314#define MT_TX_FREE_MSDU_CNT		GENMASK(9, 0)
    315#define MT_TX_FREE_MSDU_CNT_V0	GENMASK(6, 0)
    316#define MT_TX_FREE_WLAN_ID		GENMASK(23, 14)
    317#define MT_TX_FREE_LATENCY		GENMASK(12, 0)
    318/* 0: success, others: dropped */
    319#define MT_TX_FREE_MSDU_ID		GENMASK(30, 16)
    320#define MT_TX_FREE_PAIR			BIT(31)
    321#define MT_TX_FREE_MPDU_HEADER		BIT(30)
    322#define MT_TX_FREE_MSDU_ID_V3		GENMASK(14, 0)
    323
    324/* will support this field in further revision */
    325#define MT_TX_FREE_RATE			GENMASK(13, 0)
    326
    327#define MT_TXS0_FIXED_RATE		BIT(31)
    328#define MT_TXS0_BW			GENMASK(30, 29)
    329#define MT_TXS0_TID			GENMASK(28, 26)
    330#define MT_TXS0_AMPDU			BIT(25)
    331#define MT_TXS0_TXS_FORMAT		GENMASK(24, 23)
    332#define MT_TXS0_BA_ERROR		BIT(22)
    333#define MT_TXS0_PS_FLAG			BIT(21)
    334#define MT_TXS0_TXOP_TIMEOUT		BIT(20)
    335#define MT_TXS0_BIP_ERROR		BIT(19)
    336
    337#define MT_TXS0_QUEUE_TIMEOUT		BIT(18)
    338#define MT_TXS0_RTS_TIMEOUT		BIT(17)
    339#define MT_TXS0_ACK_TIMEOUT		BIT(16)
    340#define MT_TXS0_ACK_ERROR_MASK		GENMASK(18, 16)
    341
    342#define MT_TXS0_TX_STATUS_HOST		BIT(15)
    343#define MT_TXS0_TX_STATUS_MCU		BIT(14)
    344#define MT_TXS0_TX_RATE			GENMASK(13, 0)
    345
    346#define MT_TXS1_SEQNO			GENMASK(31, 20)
    347#define MT_TXS1_RESP_RATE		GENMASK(19, 16)
    348#define MT_TXS1_RXV_SEQNO		GENMASK(15, 8)
    349#define MT_TXS1_TX_POWER_DBM		GENMASK(7, 0)
    350
    351#define MT_TXS2_BF_STATUS		GENMASK(31, 30)
    352#define MT_TXS2_LAST_TX_RATE		GENMASK(29, 27)
    353#define MT_TXS2_SHARED_ANTENNA		BIT(26)
    354#define MT_TXS2_WCID			GENMASK(25, 16)
    355#define MT_TXS2_TX_DELAY		GENMASK(15, 0)
    356
    357#define MT_TXS3_PID			GENMASK(31, 24)
    358#define MT_TXS3_ANT_ID			GENMASK(23, 0)
    359
    360#define MT_TXS4_TIMESTAMP		GENMASK(31, 0)
    361
    362#define MT_TXS5_F0_FINAL_MPDU		BIT(31)
    363#define MT_TXS5_F0_QOS			BIT(30)
    364#define MT_TXS5_F0_TX_COUNT		GENMASK(29, 25)
    365#define MT_TXS5_F0_FRONT_TIME		GENMASK(24, 0)
    366#define MT_TXS5_F1_MPDU_TX_COUNT	GENMASK(31, 24)
    367#define MT_TXS5_F1_MPDU_TX_BYTES	GENMASK(23, 0)
    368
    369#define MT_TXS6_F0_NOISE_3		GENMASK(31, 24)
    370#define MT_TXS6_F0_NOISE_2		GENMASK(23, 16)
    371#define MT_TXS6_F0_NOISE_1		GENMASK(15, 8)
    372#define MT_TXS6_F0_NOISE_0		GENMASK(7, 0)
    373#define MT_TXS6_F1_MPDU_FAIL_COUNT	GENMASK(31, 24)
    374#define MT_TXS6_F1_MPDU_FAIL_BYTES	GENMASK(23, 0)
    375
    376#define MT_TXS7_F0_RCPI_3		GENMASK(31, 24)
    377#define MT_TXS7_F0_RCPI_2		GENMASK(23, 16)
    378#define MT_TXS7_F0_RCPI_1		GENMASK(15, 8)
    379#define MT_TXS7_F0_RCPI_0		GENMASK(7, 0)
    380#define MT_TXS7_F1_MPDU_RETRY_COUNT	GENMASK(31, 24)
    381#define MT_TXS7_F1_MPDU_RETRY_BYTES	GENMASK(23, 0)
    382
    383struct mt7915_dfs_pulse {
    384	u32 max_width;		/* us */
    385	int max_pwr;		/* dbm */
    386	int min_pwr;		/* dbm */
    387	u32 min_stgr_pri;	/* us */
    388	u32 max_stgr_pri;	/* us */
    389	u32 min_cr_pri;		/* us */
    390	u32 max_cr_pri;		/* us */
    391};
    392
    393struct mt7915_dfs_pattern {
    394	u8 enb;
    395	u8 stgr;
    396	u8 min_crpn;
    397	u8 max_crpn;
    398	u8 min_crpr;
    399	u8 min_pw;
    400	u32 min_pri;
    401	u32 max_pri;
    402	u8 max_pw;
    403	u8 min_crbn;
    404	u8 max_crbn;
    405	u8 min_stgpn;
    406	u8 max_stgpn;
    407	u8 min_stgpr;
    408	u8 rsv[2];
    409	u32 min_stgpr_diff;
    410} __packed;
    411
    412struct mt7915_dfs_radar_spec {
    413	struct mt7915_dfs_pulse pulse_th;
    414	struct mt7915_dfs_pattern radar_pattern[16];
    415};
    416
    417static inline struct mt7915_txp *
    418mt7915_txwi_to_txp(struct mt76_dev *dev, struct mt76_txwi_cache *t)
    419{
    420	u8 *txwi;
    421
    422	if (!t)
    423		return NULL;
    424
    425	txwi = mt76_get_txwi_ptr(dev, t);
    426
    427	return (struct mt7915_txp *)(txwi + MT_TXD_SIZE);
    428}
    429
    430#endif