drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h

/******************************************************************************
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015        Intel Deutschland GmbH
 *
 * 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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 * General Public License for more details.
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 * USA
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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 <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2015        Intel Deutschland GmbH
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 *****************************************************************************/

#ifndef __fw_api_rx_h__
#define __fw_api_rx_h__

/* API for pre-9000 hardware */

#define IWL_RX_INFO_PHY_CNT 8
#define IWL_RX_INFO_ENERGY_ANT_ABC_IDX 1
#define IWL_RX_INFO_ENERGY_ANT_A_MSK 0x000000ff
#define IWL_RX_INFO_ENERGY_ANT_B_MSK 0x0000ff00
#define IWL_RX_INFO_ENERGY_ANT_C_MSK 0x00ff0000
#define IWL_RX_INFO_ENERGY_ANT_A_POS 0
#define IWL_RX_INFO_ENERGY_ANT_B_POS 8
#define IWL_RX_INFO_ENERGY_ANT_C_POS 16

enum iwl_mac_context_info {
	MAC_CONTEXT_INFO_NONE,
	MAC_CONTEXT_INFO_GSCAN,
};

/**
 * struct iwl_rx_phy_info - phy info
 * (REPLY_RX_PHY_CMD = 0xc0)
 * @non_cfg_phy_cnt: non configurable DSP phy data byte count
 * @cfg_phy_cnt: configurable DSP phy data byte count
 * @stat_id: configurable DSP phy data set ID
 * @reserved1:
 * @system_timestamp: GP2  at on air rise
 * @timestamp: TSF at on air rise
 * @beacon_time_stamp: beacon at on-air rise
 * @phy_flags: general phy flags: band, modulation, ...
 * @channel: channel number
 * @non_cfg_phy_buf: for various implementations of non_cfg_phy
 * @rate_n_flags: RATE_MCS_*
 * @byte_count: frame's byte-count
 * @frame_time: frame's time on the air, based on byte count and frame rate
 *	calculation
 * @mac_active_msk: what MACs were active when the frame was received
 * @mac_context_info: additional info on the context in which the frame was
 *	received as defined in &enum iwl_mac_context_info
 *
 * Before each Rx, the device sends this data. It contains PHY information
 * about the reception of the packet.
 */
struct iwl_rx_phy_info {
	u8 non_cfg_phy_cnt;
	u8 cfg_phy_cnt;
	u8 stat_id;
	u8 reserved1;
	__le32 system_timestamp;
	__le64 timestamp;
	__le32 beacon_time_stamp;
	__le16 phy_flags;
	__le16 channel;
	__le32 non_cfg_phy[IWL_RX_INFO_PHY_CNT];
	__le32 rate_n_flags;
	__le32 byte_count;
	u8 mac_active_msk;
	u8 mac_context_info;
	__le16 frame_time;
} __packed;

/*
 * TCP offload Rx assist info
 *
 * bits 0:3 - reserved
 * bits 4:7 - MIC CRC length
 * bits 8:12 - MAC header length
 * bit 13 - Padding indication
 * bit 14 - A-AMSDU indication
 * bit 15 - Offload enabled
 */
enum iwl_csum_rx_assist_info {
	CSUM_RXA_RESERVED_MASK	= 0x000f,
	CSUM_RXA_MICSIZE_MASK	= 0x00f0,
	CSUM_RXA_HEADERLEN_MASK	= 0x1f00,
	CSUM_RXA_PADD		= BIT(13),
	CSUM_RXA_AMSDU		= BIT(14),
	CSUM_RXA_ENA		= BIT(15)
};

/**
 * struct iwl_rx_mpdu_res_start - phy info
 * @assist: see CSUM_RX_ASSIST_ above
 */
struct iwl_rx_mpdu_res_start {
	__le16 byte_count;
	__le16 assist;
} __packed; /* _RX_MPDU_RES_START_API_S_VER_2 */

/**
 * enum iwl_rx_phy_flags - to parse %iwl_rx_phy_info phy_flags
 * @RX_RES_PHY_FLAGS_BAND_24: true if the packet was received on 2.4 band
 * @RX_RES_PHY_FLAGS_MOD_CCK:
 * @RX_RES_PHY_FLAGS_SHORT_PREAMBLE: true if packet's preamble was short
 * @RX_RES_PHY_FLAGS_NARROW_BAND:
 * @RX_RES_PHY_FLAGS_ANTENNA: antenna on which the packet was received
 * @RX_RES_PHY_FLAGS_AGG: set if the packet was part of an A-MPDU
 * @RX_RES_PHY_FLAGS_OFDM_HT: The frame was an HT frame
 * @RX_RES_PHY_FLAGS_OFDM_GF: The frame used GF preamble
 * @RX_RES_PHY_FLAGS_OFDM_VHT: The frame was a VHT frame
 */
enum iwl_rx_phy_flags {
	RX_RES_PHY_FLAGS_BAND_24	= BIT(0),
	RX_RES_PHY_FLAGS_MOD_CCK	= BIT(1),
	RX_RES_PHY_FLAGS_SHORT_PREAMBLE	= BIT(2),
	RX_RES_PHY_FLAGS_NARROW_BAND	= BIT(3),
	RX_RES_PHY_FLAGS_ANTENNA	= (0x7 << 4),
	RX_RES_PHY_FLAGS_ANTENNA_POS	= 4,
	RX_RES_PHY_FLAGS_AGG		= BIT(7),
	RX_RES_PHY_FLAGS_OFDM_HT	= BIT(8),
	RX_RES_PHY_FLAGS_OFDM_GF	= BIT(9),
	RX_RES_PHY_FLAGS_OFDM_VHT	= BIT(10),
};

/**
 * enum iwl_mvm_rx_status - written by fw for each Rx packet
 * @RX_MPDU_RES_STATUS_CRC_OK: CRC is fine
 * @RX_MPDU_RES_STATUS_OVERRUN_OK: there was no RXE overflow
 * @RX_MPDU_RES_STATUS_SRC_STA_FOUND:
 * @RX_MPDU_RES_STATUS_KEY_VALID:
 * @RX_MPDU_RES_STATUS_KEY_PARAM_OK:
 * @RX_MPDU_RES_STATUS_ICV_OK: ICV is fine, if not, the packet is destroyed
 * @RX_MPDU_RES_STATUS_MIC_OK: used for CCM alg only. TKIP MIC is checked
 *	in the driver.
 * @RX_MPDU_RES_STATUS_TTAK_OK: TTAK is fine
 * @RX_MPDU_RES_STATUS_MNG_FRAME_REPLAY_ERR:  valid for alg = CCM_CMAC or
 *	alg = CCM only. Checks replay attack for 11w frames. Relevant only if
 *	%RX_MPDU_RES_STATUS_ROBUST_MNG_FRAME is set.
 * @RX_MPDU_RES_STATUS_SEC_NO_ENC: this frame is not encrypted
 * @RX_MPDU_RES_STATUS_SEC_WEP_ENC: this frame is encrypted using WEP
 * @RX_MPDU_RES_STATUS_SEC_CCM_ENC: this frame is encrypted using CCM
 * @RX_MPDU_RES_STATUS_SEC_TKIP_ENC: this frame is encrypted using TKIP
 * @RX_MPDU_RES_STATUS_SEC_CCM_CMAC_ENC: this frame is encrypted using CCM_CMAC
 * @RX_MPDU_RES_STATUS_SEC_ENC_ERR: this frame couldn't be decrypted
 * @RX_MPDU_RES_STATUS_SEC_ENC_MSK: bitmask of the encryption algorithm
 * @RX_MPDU_RES_STATUS_DEC_DONE: this frame has been successfully decrypted
 * @RX_MPDU_RES_STATUS_PROTECT_FRAME_BIT_CMP:
 * @RX_MPDU_RES_STATUS_EXT_IV_BIT_CMP:
 * @RX_MPDU_RES_STATUS_KEY_ID_CMP_BIT:
 * @RX_MPDU_RES_STATUS_ROBUST_MNG_FRAME: this frame is an 11w management frame
 * @RX_MPDU_RES_STATUS_CSUM_DONE: checksum was done by the hw
 * @RX_MPDU_RES_STATUS_CSUM_OK: checksum found no errors
 * @RX_MPDU_RES_STATUS_HASH_INDEX_MSK:
 * @RX_MPDU_RES_STATUS_STA_ID_MSK:
 * @RX_MPDU_RES_STATUS_RRF_KILL:
 * @RX_MPDU_RES_STATUS_FILTERING_MSK:
 * @RX_MPDU_RES_STATUS2_FILTERING_MSK:
 */
enum iwl_mvm_rx_status {
	RX_MPDU_RES_STATUS_CRC_OK			= BIT(0),
	RX_MPDU_RES_STATUS_OVERRUN_OK			= BIT(1),
	RX_MPDU_RES_STATUS_SRC_STA_FOUND		= BIT(2),
	RX_MPDU_RES_STATUS_KEY_VALID			= BIT(3),
	RX_MPDU_RES_STATUS_KEY_PARAM_OK			= BIT(4),
	RX_MPDU_RES_STATUS_ICV_OK			= BIT(5),
	RX_MPDU_RES_STATUS_MIC_OK			= BIT(6),
	RX_MPDU_RES_STATUS_TTAK_OK			= BIT(7),
	RX_MPDU_RES_STATUS_MNG_FRAME_REPLAY_ERR		= BIT(7),
	RX_MPDU_RES_STATUS_SEC_NO_ENC			= (0 << 8),
	RX_MPDU_RES_STATUS_SEC_WEP_ENC			= (1 << 8),
	RX_MPDU_RES_STATUS_SEC_CCM_ENC			= (2 << 8),
	RX_MPDU_RES_STATUS_SEC_TKIP_ENC			= (3 << 8),
	RX_MPDU_RES_STATUS_SEC_EXT_ENC			= (4 << 8),
	RX_MPDU_RES_STATUS_SEC_CCM_CMAC_ENC		= (6 << 8),
	RX_MPDU_RES_STATUS_SEC_ENC_ERR			= (7 << 8),
	RX_MPDU_RES_STATUS_SEC_ENC_MSK			= (7 << 8),
	RX_MPDU_RES_STATUS_DEC_DONE			= BIT(11),
	RX_MPDU_RES_STATUS_PROTECT_FRAME_BIT_CMP	= BIT(12),
	RX_MPDU_RES_STATUS_EXT_IV_BIT_CMP		= BIT(13),
	RX_MPDU_RES_STATUS_KEY_ID_CMP_BIT		= BIT(14),
	RX_MPDU_RES_STATUS_ROBUST_MNG_FRAME		= BIT(15),
	RX_MPDU_RES_STATUS_CSUM_DONE			= BIT(16),
	RX_MPDU_RES_STATUS_CSUM_OK			= BIT(17),
	RX_MPDU_RES_STATUS_HASH_INDEX_MSK		= (0x3F0000),
	RX_MDPU_RES_STATUS_STA_ID_SHIFT			= 24,
	RX_MPDU_RES_STATUS_STA_ID_MSK			= 0x1f << RX_MDPU_RES_STATUS_STA_ID_SHIFT,
	RX_MPDU_RES_STATUS_RRF_KILL			= BIT(29),
	RX_MPDU_RES_STATUS_FILTERING_MSK		= (0xc00000),
	RX_MPDU_RES_STATUS2_FILTERING_MSK		= (0xc0000000),
};

/* 9000 series API */
enum iwl_rx_mpdu_mac_flags1 {
	IWL_RX_MDPU_MFLG1_ADDRTYPE_MASK		= 0x03,
	IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_MASK	= 0xf0,
	/* shift should be 4, but the length is measured in 2-byte
	 * words, so shifting only by 3 gives a byte result
	 */
	IWL_RX_MPDU_MFLG1_MIC_CRC_LEN_SHIFT	= 3,
};

enum iwl_rx_mpdu_mac_flags2 {
	/* in 2-byte words */
	IWL_RX_MPDU_MFLG2_HDR_LEN_MASK		= 0x1f,
	IWL_RX_MPDU_MFLG2_PAD			= 0x20,
	IWL_RX_MPDU_MFLG2_AMSDU			= 0x40,
};

enum iwl_rx_mpdu_amsdu_info {
	IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK	= 0x3f,
	IWL_RX_MPDU_AMSDU_LAST_SUBFRAME		= 0x40,
	/* 0x80 bit reserved for now */
};

enum iwl_rx_l3l4_flags {
	IWL_RX_L3L4_IP_HDR_CSUM_OK		= BIT(0),
	IWL_RX_L3L4_TCP_UDP_CSUM_OK		= BIT(1),
	IWL_RX_L3L4_TCP_FIN_SYN_RST_PSH		= BIT(2),
	IWL_RX_L3L4_TCP_ACK			= BIT(3),
	IWL_RX_L3L4_L3_PROTO_MASK		= 0xf << 4,
	IWL_RX_L3L4_L4_PROTO_MASK		= 0xf << 8,
	IWL_RX_L3L4_RSS_HASH_MASK		= 0xf << 12,
};

enum iwl_rx_mpdu_status {
	IWL_RX_MPDU_STATUS_CRC_OK		= BIT(0),
	IWL_RX_MPDU_STATUS_OVERRUN_OK		= BIT(1),
	IWL_RX_MPDU_STATUS_SRC_STA_FOUND	= BIT(2),
	IWL_RX_MPDU_STATUS_KEY_VALID		= BIT(3),
	IWL_RX_MPDU_STATUS_KEY_ERROR		= BIT(4),
	IWL_RX_MPDU_STATUS_ICV_OK		= BIT(5),
	IWL_RX_MPDU_STATUS_MIC_OK		= BIT(6),
	/* TODO - verify this is the correct value */
	IWL_RX_MPDU_RES_STATUS_TTAK_OK		= BIT(7),
	IWL_RX_MPDU_STATUS_SEC_MASK		= 0x7 << 8,
	IWL_RX_MPDU_STATUS_SEC_NONE		= 0x0 << 8,
	IWL_RX_MPDU_STATUS_SEC_WEP		= 0x1 << 8,
	IWL_RX_MPDU_STATUS_SEC_CCM		= 0x2 << 8,
	IWL_RX_MPDU_STATUS_SEC_TKIP		= 0x3 << 8,
	/* TODO - define IWL_RX_MPDU_STATUS_SEC_EXT_ENC - this is a stub */
	IWL_RX_MPDU_STATUS_SEC_EXT_ENC		= 0x4 << 8,
	/* TODO - define IWL_RX_MPDU_STATUS_SEC_GCM - this is a stub */
	IWL_RX_MPDU_STATUS_SEC_GCM		= 0x5 << 8,
	IWL_RX_MPDU_STATUS_DECRYPTED		= BIT(11),
	IWL_RX_MPDU_STATUS_WEP_MATCH		= BIT(12),
	IWL_RX_MPDU_STATUS_EXT_IV_MATCH		= BIT(13),
	IWL_RX_MPDU_STATUS_KEY_ID_MATCH		= BIT(14),
	IWL_RX_MPDU_STATUS_KEY_COLOR		= BIT(15),
};

enum iwl_rx_mpdu_hash_filter {
	IWL_RX_MPDU_HF_A1_HASH_MASK		= 0x3f,
	IWL_RX_MPDU_HF_FILTER_STATUS_MASK	= 0xc0,
};

enum iwl_rx_mpdu_sta_id_flags {
	IWL_RX_MPDU_SIF_STA_ID_MASK		= 0x1f,
	IWL_RX_MPDU_SIF_RRF_ABORT		= 0x20,
	IWL_RX_MPDU_SIF_FILTER_STATUS_MASK	= 0xc0,
};

enum iwl_rx_mpdu_reorder_data {
	IWL_RX_MPDU_REORDER_NSSN_MASK		= 0x00000fff,
	IWL_RX_MPDU_REORDER_SN_MASK		= 0x00fff000,
	IWL_RX_MPDU_REORDER_SN_SHIFT		= 12,
	IWL_RX_MPDU_REORDER_BAID_MASK		= 0x7f000000,
	IWL_RX_MPDU_REORDER_BAID_SHIFT		= 24,
	IWL_RX_MPDU_REORDER_BA_OLD_SN		= 0x80000000,
};

struct iwl_rx_mpdu_desc {
	/* DW2 */
	__le16 mpdu_len;
	u8 mac_flags1;
	u8 mac_flags2;
	/* DW3 */
	u8 amsdu_info;
	__le16 reserved_for_software;
	u8 mac_phy_idx;
	/* DW4 */
	__le16 raw_csum; /* alledgedly unreliable */
	__le16 l3l4_flags;
	/* DW5 */
	__le16 status;
	u8 hash_filter;
	u8 sta_id_flags;
	/* DW6 */
	__le32 reorder_data;
	/* DW7 */
	__le32 rss_hash;
	/* DW8 */
	__le32 filter_match;
	/* DW9 */
	__le32 gp2_on_air_rise;
	/* DW10 */
	__le32 rate_n_flags;
	/* DW11 */
	u8 energy_a, energy_b, energy_c, channel;
	/* DW12 & DW13 */
	__le64 tsf_on_air_rise;
} __packed;

struct iwl_frame_release {
	u8 baid;
	u8 reserved;
	__le16 nssn;
};

#endif /* __fw_api_rx_h__ */