diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-3945-commands.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-3945-commands.h | 161 |
1 files changed, 92 insertions, 69 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-commands.h b/drivers/net/wireless/iwlwifi/iwl-3945-commands.h index 4885971a153..3cac2c8ccf6 100644 --- a/drivers/net/wireless/iwlwifi/iwl-3945-commands.h +++ b/drivers/net/wireless/iwlwifi/iwl-3945-commands.h @@ -743,36 +743,86 @@ struct iwl4965_rx_mpdu_res_start { * (5) * Tx Commands & Responses: * + * Driver must place each REPLY_TX command into one of the prioritized Tx + * queues in host DRAM, shared between driver and device. When the device's + * Tx scheduler and uCode are preparing to transmit, the device pulls the + * Tx command over the PCI bus via one of the device's Tx DMA channels, + * to fill an internal FIFO from which data will be transmitted. + * + * uCode handles all timing and protocol related to control frames + * (RTS/CTS/ACK), based on flags in the Tx command. + * + * uCode handles retrying Tx when an ACK is expected but not received. + * This includes trying lower data rates than the one requested in the Tx + * command, as set up by the REPLY_RATE_SCALE (for 3945) or + * REPLY_TX_LINK_QUALITY_CMD (4965). + * + * Driver sets up transmit power for various rates via REPLY_TX_PWR_TABLE_CMD. + * This command must be executed after every RXON command, before Tx can occur. *****************************************************************************/ -/* Tx flags */ +/* REPLY_TX Tx flags field */ + +/* 1: Use Request-To-Send protocol before this frame. + * Mutually exclusive vs. TX_CMD_FLG_CTS_MSK. */ #define TX_CMD_FLG_RTS_MSK __constant_cpu_to_le32(1 << 1) + +/* 1: Transmit Clear-To-Send to self before this frame. + * Driver should set this for AUTH/DEAUTH/ASSOC-REQ/REASSOC mgmnt frames. + * Mutually exclusive vs. TX_CMD_FLG_RTS_MSK. */ #define TX_CMD_FLG_CTS_MSK __constant_cpu_to_le32(1 << 2) + +/* 1: Expect ACK from receiving station + * 0: Don't expect ACK (MAC header's duration field s/b 0) + * Set this for unicast frames, but not broadcast/multicast. */ #define TX_CMD_FLG_ACK_MSK __constant_cpu_to_le32(1 << 3) + +/* 1: Use rate scale table (see REPLY_TX_LINK_QUALITY_CMD). + * Tx command's initial_rate_index indicates first rate to try; + * uCode walks through table for additional Tx attempts. + * 0: Use Tx rate/MCS from Tx command's rate_n_flags field. + * This rate will be used for all Tx attempts; it will not be scaled. */ #define TX_CMD_FLG_STA_RATE_MSK __constant_cpu_to_le32(1 << 4) + +/* 1: Expect immediate block-ack. + * Set when Txing a block-ack request frame. Also set TX_CMD_FLG_ACK_MSK. */ #define TX_CMD_FLG_IMM_BA_RSP_MASK __constant_cpu_to_le32(1 << 6) + +/* 1: Frame requires full Tx-Op protection. + * Set this if either RTS or CTS Tx Flag gets set. */ #define TX_CMD_FLG_FULL_TXOP_PROT_MSK __constant_cpu_to_le32(1 << 7) + +/* Tx antenna selection field; used only for 3945, reserved (0) for 4965. + * Set field to "0" to allow 3945 uCode to select antenna (normal usage). */ #define TX_CMD_FLG_ANT_SEL_MSK __constant_cpu_to_le32(0xf00) #define TX_CMD_FLG_ANT_A_MSK __constant_cpu_to_le32(1 << 8) #define TX_CMD_FLG_ANT_B_MSK __constant_cpu_to_le32(1 << 9) -/* ucode ignores BT priority for this frame */ +/* 1: Ignore Bluetooth priority for this frame. + * 0: Delay Tx until Bluetooth device is done (normal usage). */ #define TX_CMD_FLG_BT_DIS_MSK __constant_cpu_to_le32(1 << 12) -/* ucode overrides sequence control */ +/* 1: uCode overrides sequence control field in MAC header. + * 0: Driver provides sequence control field in MAC header. + * Set this for management frames, non-QOS data frames, non-unicast frames, + * and also in Tx command embedded in REPLY_SCAN_CMD for active scans. */ #define TX_CMD_FLG_SEQ_CTL_MSK __constant_cpu_to_le32(1 << 13) -/* signal that this frame is non-last MPDU */ +/* 1: This frame is non-last MPDU; more fragments are coming. + * 0: Last fragment, or not using fragmentation. */ #define TX_CMD_FLG_MORE_FRAG_MSK __constant_cpu_to_le32(1 << 14) -/* calculate TSF in outgoing frame */ +/* 1: uCode calculates and inserts Timestamp Function (TSF) in outgoing frame. + * 0: No TSF required in outgoing frame. + * Set this for transmitting beacons and probe responses. */ #define TX_CMD_FLG_TSF_MSK __constant_cpu_to_le32(1 << 16) -/* activate TX calibration. */ -#define TX_CMD_FLG_CALIB_MSK __constant_cpu_to_le32(1 << 17) - -/* signals that 2 bytes pad was inserted - after the MAC header */ +/* 1: Driver inserted 2 bytes pad after the MAC header, for (required) dword + * alignment of frame's payload data field. + * 0: No pad + * Set this for MAC headers with 26 or 30 bytes, i.e. those with QOS or ADDR4 + * field (but not both). Driver must align frame data (i.e. data following + * MAC header) to DWORD boundary. */ #define TX_CMD_FLG_MH_PAD_MSK __constant_cpu_to_le32(1 << 20) /* HCCA-AP - disable duration overwriting. */ @@ -789,23 +839,33 @@ struct iwl4965_rx_mpdu_res_start { #define TX_CMD_SEC_KEY128 0x08 /* - * TX command Frame life time - */ - -struct iwl3945_dram_scratch { - u8 try_cnt; - u8 bt_kill_cnt; - __le16 reserved; -} __attribute__ ((packed)); - -/* * REPLY_TX = 0x1c (command) */ struct iwl3945_tx_cmd { + /* + * MPDU byte count: + * 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) + * NOTE: Does not include Tx command bytes, post-MAC pad bytes, + * MIC (CCM) 8 bytes, ICV (WEP/TKIP/CKIP) 4 bytes, CRC 4 bytes.i + * Range: 14-2342 bytes. + */ __le16 len; + + /* + * MPDU or MSDU byte count for next frame. + * Used for fragmentation and bursting, but not 11n aggregation. + * Same as "len", but for next frame. Set to 0 if not applicable. + */ __le16 next_frame_len; - __le32 tx_flags; + + __le32 tx_flags; /* TX_CMD_FLG_* */ + u8 rate; + + /* Index of recipient station in uCode's station table */ u8 sta_id; u8 tid_tspec; u8 sec_ctl; @@ -827,7 +887,17 @@ struct iwl3945_tx_cmd { __le16 pm_frame_timeout; __le16 attempt_duration; } timeout; + + /* + * Duration of EDCA burst Tx Opportunity, in 32-usec units. + * Set this if txop time is not specified by HCCA protocol (e.g. by AP). + */ __le16 driver_txop; + + /* + * MAC header goes here, followed by 2 bytes padding if MAC header + * length is 26 or 30 bytes, followed by payload data + */ u8 payload[0]; struct ieee80211_hdr hdr[0]; } __attribute__ ((packed)); @@ -899,37 +969,6 @@ enum { TX_ABORT_REQUIRED_MSK = 0x80000000, /* bits 31:31 */ }; -/* ******************************* - * TX aggregation state - ******************************* */ - -enum { - AGG_TX_STATE_TRANSMITTED = 0x00, - AGG_TX_STATE_UNDERRUN_MSK = 0x01, - AGG_TX_STATE_BT_PRIO_MSK = 0x02, - AGG_TX_STATE_FEW_BYTES_MSK = 0x04, - AGG_TX_STATE_ABORT_MSK = 0x08, - AGG_TX_STATE_LAST_SENT_TTL_MSK = 0x10, - AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK = 0x20, - AGG_TX_STATE_LAST_SENT_BT_KILL_MSK = 0x40, - AGG_TX_STATE_SCD_QUERY_MSK = 0x80, - AGG_TX_STATE_TEST_BAD_CRC32_MSK = 0x100, - AGG_TX_STATE_RESPONSE_MSK = 0x1ff, - AGG_TX_STATE_DUMP_TX_MSK = 0x200, - AGG_TX_STATE_DELAY_TX_MSK = 0x400 -}; - -#define AGG_TX_STATE_LAST_SENT_MSK \ -(AGG_TX_STATE_LAST_SENT_TTL_MSK | \ - AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK | \ - AGG_TX_STATE_LAST_SENT_BT_KILL_MSK) - -#define AGG_TX_STATE_TRY_CNT_POS 12 -#define AGG_TX_STATE_TRY_CNT_MSK 0xf000 - -#define AGG_TX_STATE_SEQ_NUM_POS 16 -#define AGG_TX_STATE_SEQ_NUM_MSK 0xffff0000 - /* * REPLY_TX = 0x1c (response) */ @@ -939,23 +978,7 @@ struct iwl3945_tx_resp { u8 bt_kill_count; u8 rate; __le32 wireless_media_time; - __le32 status; /* TX status (for aggregation status of 1st frame) */ -} __attribute__ ((packed)); - -/* - * REPLY_COMPRESSED_BA = 0xc5 (response only, not a command) - */ -struct iwl3945_compressed_ba_resp { - __le32 sta_addr_lo32; - __le16 sta_addr_hi16; - __le16 reserved; - u8 sta_id; - u8 tid; - __le16 ba_seq_ctl; - __le32 ba_bitmap0; - __le32 ba_bitmap1; - __le16 scd_flow; - __le16 scd_ssn; + __le32 status; /* TX status */ } __attribute__ ((packed)); /* |