/****************************************************************************** * * 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) 2005 - 2011 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) 2005 - 2011 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. *
*****************************************************************************/
/** * struct il_cmd_header * * This header format appears in the beginning of each command sent from the * driver, and each response/notification received from uCode.
*/ struct il_cmd_header {
u8 cmd; /* Command ID: C_RXON, etc. */
u8 flags; /* 0:5 reserved, 6 abort, 7 internal */ /* * The driver sets up the sequence number to values of its choosing. * uCode does not use this value, but passes it back to the driver * when sending the response to each driver-originated command, so * the driver can match the response to the command. Since the values * don't get used by uCode, the driver may set up an arbitrary format. * * There is one exception: uCode sets bit 15 when it originates * the response/notification, i.e. when the response/notification * is not a direct response to a command sent by the driver. For * example, uCode issues N_3945_RX when it sends a received frame * to the driver; it is not a direct response to any driver command. * * The Linux driver uses the following format: * * 0:7 tfd idx - position within TX queue * 8:12 TX queue id * 13 reserved * 14 huge - driver sets this to indicate command is in the * 'huge' storage at the end of the command buffers * 15 unsolicited RX or uCode-originated notification
*/
__le16 sequence;
} __packed;
/** * struct il3945_tx_power * * Used in C_TX_PWR_TBL, C_SCAN, C_CHANNEL_SWITCH * * Each entry contains two values: * 1) DSP gain (or sometimes called DSP attenuation). This is a fine-grained * linear value that multiplies the output of the digital signal processor, * before being sent to the analog radio. * 2) Radio gain. This sets the analog gain of the radio Tx path. * It is a coarser setting, and behaves in a logarithmic (dB) fashion. * * Driver obtains values from struct il3945_tx_power power_gain_table[][].
*/ struct il3945_tx_power {
u8 tx_gain; /* gain for analog radio */
u8 dsp_atten; /* gain for DSP */
} __packed;
/** * union il4965_tx_power_dual_stream * * Host format used for C_TX_PWR_TBL, C_CHANNEL_SWITCH * Use __le32 version (struct tx_power_dual_stream) when building command. * * Driver provides radio gain and DSP attenuation settings to device in pairs, * one value for each transmitter chain. The first value is for transmitter A, * second for transmitter B. * * For SISO bit rates, both values in a pair should be identical. * For MIMO rates, one value may be different from the other, * in order to balance the Tx output between the two transmitters. * * See more details in doc for TXPOWER in 4965.h.
*/ union il4965_tx_power_dual_stream { struct {
u8 radio_tx_gain[2];
u8 dsp_predis_atten[2];
} s;
u32 dw;
};
/** * struct tx_power_dual_stream * * Table entries in C_TX_PWR_TBL, C_CHANNEL_SWITCH * * Same format as il_tx_power_dual_stream, but __le32
*/ struct tx_power_dual_stream {
__le32 dw;
} __packed;
/* * ("Initialize") N_ALIVE = 0x1 (response only, not a command) * * uCode issues this "initialize alive" notification once the initialization * uCode image has completed its work, and is ready to load the runtime image. * This is the *first* "alive" notification that the driver will receive after * rebooting uCode; the "initialize" alive is indicated by subtype field == 9. * * See comments documenting "BSM" (bootstrap state machine). * * For 4965, this notification contains important calibration data for * calculating txpower settings: * * 1) Power supply voltage indication. The voltage sensor outputs higher * values for lower voltage, and vice verse. * * 2) Temperature measurement parameters, for each of two channel widths * (20 MHz and 40 MHz) supported by the radios. Temperature sensing * is done via one of the receiver chains, and channel width influences * the results. * * 3) Tx gain compensation to balance 4965's 2 Tx chains for MIMO operation, * for each of 5 frequency ranges.
*/ struct il_init_alive_resp {
u8 ucode_minor;
u8 ucode_major;
__le16 reserved1;
u8 sw_rev[8];
u8 ver_type;
u8 ver_subtype; /* "9" for initialize alive */
__le16 reserved2;
__le32 log_event_table_ptr;
__le32 error_event_table_ptr;
__le32 timestamp;
__le32 is_valid;
/* calibration values from "initialize" uCode */
__le32 voltage; /* signed, higher value is lower voltage */
__le32 therm_r1[2]; /* signed, 1st for normal, 2nd for HT40 */
__le32 therm_r2[2]; /* signed */
__le32 therm_r3[2]; /* signed */
__le32 therm_r4[2]; /* signed */
__le32 tx_atten[5][2]; /* signed MIMO gain comp, 5 freq groups,
* 2 Tx chains */
} __packed;
/** * N_ALIVE = 0x1 (response only, not a command) * * uCode issues this "alive" notification once the runtime image is ready * to receive commands from the driver. This is the *second* "alive" * notification that the driver will receive after rebooting uCode; * this "alive" is indicated by subtype field != 9. * * See comments documenting "BSM" (bootstrap state machine). * * This response includes two pointers to structures within the device's * data SRAM (access via HBUS_TARG_MEM_* regs) that are useful for debugging: * * 1) log_event_table_ptr indicates base of the event log. This traces * a 256-entry history of uCode execution within a circular buffer. * Its header format is: * * __le32 log_size; log capacity (in number of entries) * __le32 type; (1) timestamp with each entry, (0) no timestamp * __le32 wraps; # times uCode has wrapped to top of circular buffer * __le32 write_idx; next circular buffer entry that uCode would fill * * The header is followed by the circular buffer of log entries. Entries * with timestamps have the following format: * * __le32 event_id; range 0 - 1500 * __le32 timestamp; low 32 bits of TSF (of network, if associated) * __le32 data; event_id-specific data value * * Entries without timestamps contain only event_id and data. * * * 2) error_event_table_ptr indicates base of the error log. This contains * information about any uCode error that occurs. For 4965, the format * of the error log is: * * __le32 valid; (nonzero) valid, (0) log is empty * __le32 error_id; type of error * __le32 pc; program counter * __le32 blink1; branch link * __le32 blink2; branch link * __le32 ilink1; interrupt link * __le32 ilink2; interrupt link * __le32 data1; error-specific data * __le32 data2; error-specific data * __le32 line; source code line of error * __le32 bcon_time; beacon timer * __le32 tsf_low; network timestamp function timer * __le32 tsf_hi; network timestamp function timer * __le32 gp1; GP1 timer register * __le32 gp2; GP2 timer register * __le32 gp3; GP3 timer register * __le32 ucode_ver; uCode version * __le32 hw_ver; HW Silicon version * __le32 brd_ver; HW board version * __le32 log_pc; log program counter * __le32 frame_ptr; frame pointer * __le32 stack_ptr; stack pointer * __le32 hcmd; last host command * __le32 isr0; isr status register LMPM_NIC_ISR0: rxtx_flag * __le32 isr1; isr status register LMPM_NIC_ISR1: host_flag * __le32 isr2; isr status register LMPM_NIC_ISR2: enc_flag * __le32 isr3; isr status register LMPM_NIC_ISR3: time_flag * __le32 isr4; isr status register LMPM_NIC_ISR4: wico interrupt * __le32 isr_pref; isr status register LMPM_NIC_PREF_STAT * __le32 wait_event; wait event() caller address * __le32 l2p_control; L2pControlField * __le32 l2p_duration; L2pDurationField * __le32 l2p_mhvalid; L2pMhValidBits * __le32 l2p_addr_match; L2pAddrMatchStat * __le32 lmpm_pmg_sel; indicate which clocks are turned on (LMPM_PMG_SEL) * __le32 u_timestamp; indicate when the date and time of the compilation * __le32 reserved; * * The Linux driver can print both logs to the system log when a uCode error * occurs.
*/ struct il_alive_resp {
u8 ucode_minor;
u8 ucode_major;
__le16 reserved1;
u8 sw_rev[8];
u8 ver_type;
u8 ver_subtype; /* not "9" for runtime alive */
__le16 reserved2;
__le32 log_event_table_ptr; /* SRAM address for event log */
__le32 error_event_table_ptr; /* SRAM address for error log */
__le32 timestamp;
__le32 is_valid;
} __packed;
/* CTS to self (if spec allows) flag */ #define RXON_FLG_SELF_CTS_EN cpu_to_le32(0x1<<30)
/* rx_config filter flags */ /* accept all data frames */ #define RXON_FILTER_PROMISC_MSK cpu_to_le32(1 << 0) /* pass control & management to host */ #define RXON_FILTER_CTL2HOST_MSK cpu_to_le32(1 << 1) /* accept multi-cast */ #define RXON_FILTER_ACCEPT_GRP_MSK cpu_to_le32(1 << 2) /* don't decrypt uni-cast frames */ #define RXON_FILTER_DIS_DECRYPT_MSK cpu_to_le32(1 << 3) /* don't decrypt multi-cast frames */ #define RXON_FILTER_DIS_GRP_DECRYPT_MSK cpu_to_le32(1 << 4) /* STA is associated */ #define RXON_FILTER_ASSOC_MSK cpu_to_le32(1 << 5) /* transfer to host non bssid beacons in associated state */ #define RXON_FILTER_BCON_AWARE_MSK cpu_to_le32(1 << 6)
/** * C_RXON = 0x10 (command, has simple generic response) * * RXON tunes the radio tuner to a service channel, and sets up a number * of parameters that are used primarily for Rx, but also for Tx operations. * * NOTE: When tuning to a new channel, driver must set the * RXON_FILTER_ASSOC_MSK to 0. This will clear station-dependent * info within the device, including the station tables, tx retry * rate tables, and txpower tables. Driver must build a new station * table and txpower table before transmitting anything on the RXON * channel. * * NOTE: All RXONs wipe clean the internal txpower table. Driver must * issue a new C_TX_PWR_TBL after each C_RXON (0x10), * regardless of whether RXON_FILTER_ASSOC_MSK is set.
*/
/* Create a common rxon cmd which will be typecast into the 3945 or 4965 * specific rxon cmd, depending on where it is called from.
*/ struct il_rxon_cmd {
u8 node_addr[6];
__le16 reserved1;
u8 bssid_addr[6];
__le16 reserved2;
u8 wlap_bssid_addr[6];
__le16 reserved3;
u8 dev_type;
u8 air_propagation;
__le16 rx_chain;
u8 ofdm_basic_rates;
u8 cck_basic_rates;
__le16 assoc_id;
__le32 flags;
__le32 filter_flags;
__le16 channel;
u8 ofdm_ht_single_stream_basic_rates;
u8 ofdm_ht_dual_stream_basic_rates;
u8 reserved4;
u8 reserved5;
} __packed;
/** * struct il_ac_qos -- QOS timing params for C_QOS_PARAM * One for each of 4 EDCA access categories in struct il_qosparam_cmd * * @cw_min: Contention win, start value in numbers of slots. * Should be a power-of-2, minus 1. Device's default is 0x0f. * @cw_max: Contention win, max value in numbers of slots. * Should be a power-of-2, minus 1. Device's default is 0x3f. * @aifsn: Number of slots in Arbitration Interframe Space (before * performing random backoff timing prior to Tx). Device default 1. * @edca_txop: Length of Tx opportunity, in uSecs. Device default is 0. * * Device will automatically increase contention win by (2*CW) + 1 for each * transmission retry. Device uses cw_max as a bit mask, ANDed with new CW * value, to cap the CW value.
*/ struct il_ac_qos {
__le16 cw_min;
__le16 cw_max;
u8 aifsn;
u8 reserved1;
__le16 edca_txop;
} __packed;
#define STA_KEY_FLG_KEYID_POS 8 #define STA_KEY_FLG_INVALID cpu_to_le16(0x0800) /* wep key is either from global key (0) or from station info array (1) */ #define STA_KEY_FLG_MAP_KEY_MSK cpu_to_le16(0x0008)
/* wep key in STA: 5-bytes (0) or 13-bytes (1) */ #define STA_KEY_FLG_KEY_SIZE_MSK cpu_to_le16(0x1000) #define STA_KEY_MULTICAST_MSK cpu_to_le16(0x4000) #define STA_KEY_MAX_NUM 8
/* Flags indicate whether to modify vs. don't change various station params */ #define STA_MODIFY_KEY_MASK 0x01 #define STA_MODIFY_TID_DISABLE_TX 0x02 #define STA_MODIFY_TX_RATE_MSK 0x04 #define STA_MODIFY_ADDBA_TID_MSK 0x08 #define STA_MODIFY_DELBA_TID_MSK 0x10 #define STA_MODIFY_SLEEP_TX_COUNT_MSK 0x20
/* Receiver address (actually, Rx station's idx into station table),
* combined with Traffic ID (QOS priority), in format used by Tx Scheduler */ #define BUILD_RAxTID(sta_id, tid) (((sta_id) << 4) + (tid))
/** * struct sta_id_modify * @addr[ETH_ALEN]: station's MAC address * @sta_id: idx of station in uCode's station table * @modify_mask: STA_MODIFY_*, 1: modify, 0: don't change * * Driver selects unused table idx when adding new station, * or the idx to a pre-existing station entry when modifying that station. * Some idxes have special purposes (IL_AP_ID, idx 0, is for AP). * * modify_mask flags select which parameters to modify vs. leave alone.
*/ struct sta_id_modify {
u8 addr[ETH_ALEN];
__le16 reserved1;
u8 sta_id;
u8 modify_mask;
__le16 reserved2;
} __packed;
/* * C_ADD_STA = 0x18 (command) * * The device contains an internal table of per-station information, * with info on security keys, aggregation parameters, and Tx rates for * initial Tx attempt and any retries (4965 devices uses * C_TX_LINK_QUALITY_CMD, * 3945 uses C_RATE_SCALE to set up rate tables). * * C_ADD_STA sets up the table entry for one station, either creating * a new entry, or modifying a pre-existing one. * * NOTE: RXON command (without "associated" bit set) wipes the station table * clean. Moving into RF_KILL state does this also. Driver must set up * new station table before transmitting anything on the RXON channel * (except active scans or active measurements; those commands carry * their own txpower/rate setup data). * * When getting started on a new channel, driver must set up the * IL_BROADCAST_ID entry (last entry in the table). For a client * station in a BSS, once an AP is selected, driver sets up the AP STA * in the IL_AP_ID entry (1st entry in the table). BROADCAST and AP * are all that are needed for a BSS client station. If the device is * used as AP, or in an IBSS network, driver must set up station table * entries for all STAs in network, starting with idx IL_STA_ID.
*/
/* bit field to disable (1) or enable (0) Tx for Traffic ID (TID) * corresponding to bit (e.g. bit 5 controls TID 5).
* Set modify_mask bit STA_MODIFY_TID_DISABLE_TX to use this field. */
__le16 tid_disable_tx;
__le16 rate_n_flags;
/* TID for which to add block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
u8 add_immediate_ba_tid;
/* TID for which to remove block-ack support.
* Set modify_mask bit STA_MODIFY_DELBA_TID_MSK to use this field. */
u8 remove_immediate_ba_tid;
/* Starting Sequence Number for added block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
__le16 add_immediate_ba_ssn;
} __packed;
/* bit field to disable (1) or enable (0) Tx for Traffic ID (TID) * corresponding to bit (e.g. bit 5 controls TID 5).
* Set modify_mask bit STA_MODIFY_TID_DISABLE_TX to use this field. */
__le16 tid_disable_tx;
__le16 reserved1;
/* TID for which to add block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
u8 add_immediate_ba_tid;
/* TID for which to remove block-ack support.
* Set modify_mask bit STA_MODIFY_DELBA_TID_MSK to use this field. */
u8 remove_immediate_ba_tid;
/* Starting Sequence Number for added block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
__le16 add_immediate_ba_ssn;
/* * Number of packets OK to transmit to station even though * it is asleep -- used to synchronise PS-poll and u-APSD * responses while ucode keeps track of STA sleep state.
*/
__le16 sleep_tx_count;
/* bit field to disable (1) or enable (0) Tx for Traffic ID (TID) * corresponding to bit (e.g. bit 5 controls TID 5).
* Set modify_mask bit STA_MODIFY_TID_DISABLE_TX to use this field. */
__le16 tid_disable_tx;
__le16 rate_n_flags; /* 3945 only */
/* TID for which to add block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
u8 add_immediate_ba_tid;
/* TID for which to remove block-ack support.
* Set modify_mask bit STA_MODIFY_DELBA_TID_MSK to use this field. */
u8 remove_immediate_ba_tid;
/* Starting Sequence Number for added block-ack support.
* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
__le16 add_immediate_ba_ssn;
/* * Number of packets OK to transmit to station even though * it is asleep -- used to synchronise PS-poll and u-APSD * responses while ucode keeps track of STA sleep state.
*/
__le16 sleep_tx_count;
/* * C_REM_STA = 0x19 (command)
*/ struct il_rem_sta_cmd {
u8 num_sta; /* number of removed stations */
u8 reserved[3];
u8 addr[ETH_ALEN]; /* MAC addr of the first station */
u8 reserved2[2];
} __packed;
/* * N_3945_RX = 0x1b (response only, not a command) * * NOTE: DO NOT dereference from casts to this structure * It is provided only for calculating minimum data set size. * The actual offsets of the hdr and end are dynamic based on * stats.phy_count
*/ struct il3945_rx_frame { struct il3945_rx_frame_stats_hdr stats; struct il3945_rx_frame_hdr_hdr hdr; struct il3945_rx_frame_end end;
} __packed;
#define IL49_RX_RES_PHY_CNT 14 #define IL49_RX_PHY_FLAGS_ANTENNAE_OFFSET (4) #define IL49_RX_PHY_FLAGS_ANTENNAE_MASK (0x70) #define IL49_AGC_DB_MASK (0x3f80) /* MASK(7,13) */ #define IL49_AGC_DB_POS (7) struct il4965_rx_non_cfg_phy {
__le16 ant_selection; /* ant A bit 4, ant B bit 5, ant C bit 6 */
__le16 agc_info; /* agc code 0:6, agc dB 7:13, reserved 14:15 */
u8 rssi_info[6]; /* we use even entries, 0/2/4 for A/B/C rssi */
u8 pad[];
} __packed;
/* * N_RX = 0xc3 (response only, not a command) * Used only for legacy (non 11n) frames.
*/ struct il_rx_phy_res {
u8 non_cfg_phy_cnt; /* non configurable DSP phy data byte count */
u8 cfg_phy_cnt; /* configurable DSP phy data byte count */
u8 stat_id; /* configurable DSP phy data set ID */
u8 reserved1;
__le64 timestamp; /* TSF at on air rise */
__le32 beacon_time_stamp; /* beacon at on-air rise */
__le16 phy_flags; /* general phy flags: band, modulation, ... */
__le16 channel; /* channel number */
u8 non_cfg_phy_buf[32]; /* for various implementations of non_cfg_phy */
__le32 rate_n_flags; /* RATE_MCS_* */
__le16 byte_count; /* frame's byte-count */
__le16 frame_time; /* frame's time on the air */
} __packed;
/****************************************************************************** * (5) * Tx Commands & Responses: * * Driver must place each C_TX command into one of the prioritized Tx * queues in host DRAM, shared between driver and device (see comments for * SCD registers and Tx/Rx Queues). 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 and Tx scheduler * handle reception of block-acks; uCode updates the host driver via * N_COMPRESSED_BA. * * 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 C_RATE_SCALE (for 3945) or * C_TX_LINK_QUALITY_CMD (4965). * * Driver sets up transmit power for various rates via C_TX_PWR_TBL. * This command must be executed after every RXON command, before Tx can occur.
*****************************************************************************/
/* C_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 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 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 cpu_to_le32(1 << 3)
/* For 4965 devices: * 1: Use rate scale table (see C_TX_LINK_QUALITY_CMD). * Tx command's initial_rate_idx 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 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 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 cpu_to_le32(1 << 7)
/* Tx antenna selection field; used only for 3945, reserved (0) for 4965 devices.
* Set field to "0" to allow 3945 uCode to select antenna (normal usage). */ #define TX_CMD_FLG_ANT_SEL_MSK cpu_to_le32(0xf00) #define TX_CMD_FLG_ANT_A_MSK cpu_to_le32(1 << 8) #define TX_CMD_FLG_ANT_B_MSK cpu_to_le32(1 << 9)
/* 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 C_SCAN for active scans. */ #define TX_CMD_FLG_SEQ_CTL_MSK cpu_to_le32(1 << 13)
/* 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 cpu_to_le32(1 << 14)
/* 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 cpu_to_le32(1 << 16)
/* 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 cpu_to_le32(1 << 20)
/* accelerate aggregation support
* 0 - no CCMP encryption; 1 - CCMP encryption */ #define TX_CMD_FLG_AGG_CCMP_MSK cpu_to_le32(1 << 22)
struct il3945_tx_cmd { /* New members MUST be added within the __struct_group() macro below. */
__struct_group(il3945_tx_cmd_hdr, __hdr, __packed, /* * 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; /* TX_CMD_FLG_* */
u8 rate;
/* Index of recipient station in uCode's station table */
u8 sta_id;
u8 tid_tspec;
u8 sec_ctl;
u8 key[16]; union {
u8 byte[8];
__le16 word[4];
__le32 dw[2];
} tkip_mic;
__le32 next_frame_info; union {
__le32 life_time;
__le32 attempt;
} stop_time;
u8 supp_rates[2];
u8 rts_retry_limit; /*byte 50 */
u8 data_retry_limit; /*byte 51 */ union {
__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
*/ struct ieee80211_hdr hdr[];
} __packed;
static_assert(offsetof(struct il3945_tx_cmd, hdr) == sizeof(struct il3945_tx_cmd_hdr), "struct member likely outside of __struct_group()");
/* * 4965 uCode updates these Tx attempt count values in host DRAM. * Used for managing Tx retries when expecting block-acks. * Driver should set these fields to 0.
*/ struct il_dram_scratch {
u8 try_cnt; /* Tx attempts */
u8 bt_kill_cnt; /* Tx attempts blocked by Bluetooth device */
__le16 reserved;
} __packed;
struct il_tx_cmd { /* New members MUST be added within the __struct_group() macro below. */
__struct_group(il_tx_cmd_hdr, __hdr, __packed, /* * 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; /* TX_CMD_FLG_* */
/* uCode may modify this field of the Tx command (in host DRAM!).
* Driver must also set dram_lsb_ptr and dram_msb_ptr in this cmd. */ struct il_dram_scratch scratch;
/* Rate for *all* Tx attempts, if TX_CMD_FLG_STA_RATE_MSK is cleared. */
__le32 rate_n_flags; /* RATE_MCS_* */
/* Index of destination station in uCode's station table */
u8 sta_id;
/* Type of security encryption: CCM or TKIP */
u8 sec_ctl; /* TX_CMD_SEC_* */
/* * Index into rate table (see C_TX_LINK_QUALITY_CMD) for initial * Tx attempt, if TX_CMD_FLG_STA_RATE_MSK is set. Normally "0" for * data frames, this field may be used to selectively reduce initial * rate (via non-0 value) for special frames (e.g. management), while * still supporting rate scaling for all frames.
*/
u8 initial_rate_idx;
u8 reserved;
u8 key[16];
__le16 next_frame_flags;
__le16 reserved2; union {
__le32 life_time;
__le32 attempt;
} stop_time;
/* Host DRAM physical address pointer to "scratch" in this command.
* Must be dword aligned. "0" in dram_lsb_ptr disables usage. */
__le32 dram_lsb_ptr;
u8 dram_msb_ptr;
/* * 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
*/ struct ieee80211_hdr hdr[];
} __packed;
static_assert(offsetof(struct il_tx_cmd, hdr) == sizeof(struct il_tx_cmd_hdr), "struct member likely outside of __struct_group()");
/* TX command response is sent after *3945* transmission attempts. * * NOTES: * * TX_STATUS_FAIL_NEXT_FRAG * * If the fragment flag in the MAC header for the frame being transmitted * is set and there is insufficient time to transmit the next frame, the * TX status will be returned with 'TX_STATUS_FAIL_NEXT_FRAG'. * * TX_STATUS_FIFO_UNDERRUN * * Indicates the host did not provide bytes to the FIFO fast enough while * a TX was in progress. * * TX_STATUS_FAIL_MGMNT_ABORT * * This status is only possible if the ABORT ON MGMT RX parameter was * set to true with the TX command. * * If the MSB of the status parameter is set then an abort sequence is * required. This sequence consists of the host activating the TX Abort * control line, and then waiting for the TX Abort command response. This * indicates that a the device is no longer in a transmit state, and that the * command FIFO has been cleared. The host must then deactivate the TX Abort * control line. Receiving is still allowed in this case.
*/ enum {
TX_3945_STATUS_SUCCESS = 0x01,
TX_3945_STATUS_DIRECT_DONE = 0x02,
TX_3945_STATUS_FAIL_SHORT_LIMIT = 0x82,
TX_3945_STATUS_FAIL_LONG_LIMIT = 0x83,
TX_3945_STATUS_FAIL_FIFO_UNDERRUN = 0x84,
TX_3945_STATUS_FAIL_MGMNT_ABORT = 0x85,
TX_3945_STATUS_FAIL_NEXT_FRAG = 0x86,
TX_3945_STATUS_FAIL_LIFE_EXPIRE = 0x87,
TX_3945_STATUS_FAIL_DEST_PS = 0x88,
TX_3945_STATUS_FAIL_ABORTED = 0x89,
TX_3945_STATUS_FAIL_BT_RETRY = 0x8a,
TX_3945_STATUS_FAIL_STA_INVALID = 0x8b,
TX_3945_STATUS_FAIL_FRAG_DROPPED = 0x8c,
TX_3945_STATUS_FAIL_TID_DISABLE = 0x8d,
TX_3945_STATUS_FAIL_FRAME_FLUSHED = 0x8e,
TX_3945_STATUS_FAIL_INSUFFICIENT_CF_POLL = 0x8f,
TX_3945_STATUS_FAIL_TX_LOCKED = 0x90,
TX_3945_STATUS_FAIL_NO_BEACON_ON_RADAR = 0x91,
};
/* * TX command response is sent after *4965* transmission attempts. * * both postpone and abort status are expected behavior from uCode. there is * no special operation required from driver; except for RFKILL_FLUSH, * which required tx flush host command to flush all the tx frames in queues
*/ enum {
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_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_FIFO_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_INSUFFICIENT_CF_POLL = 0x8f,
TX_STATUS_FAIL_PASSIVE_NO_RX = 0x90,
TX_STATUS_FAIL_NO_BEACON_ON_RADAR = 0x91,
};
/* # tx attempts for first frame in aggregation */ #define AGG_TX_STATE_TRY_CNT_POS 12 #define AGG_TX_STATE_TRY_CNT_MSK 0xf000
/* Command ID and sequence number of Tx command for this frame */ #define AGG_TX_STATE_SEQ_NUM_POS 16 #define AGG_TX_STATE_SEQ_NUM_MSK 0xffff0000
/* * C_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 * 2 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 4965 device records * this status. * This status relates to reasons the tx might have been blocked or aborted * within the sending station (this 4965 device), rather than whether it was * received successfully by the destination station.
*/ struct agg_tx_status {
__le16 status;
__le16 sequence;
} __packed;
struct il4965_tx_resp {
u8 frame_count; /* 1 no aggregation, >1 aggregation */
u8 bt_kill_count; /* # blocked by bluetooth (unused for agg) */
u8 failure_rts; /* # failures due to unsuccessful RTS */
u8 failure_frame; /* # failures due to no ACK (unused for agg) */
/* For non-agg: Rate at which frame was successful.
* For agg: Rate at which all frames were transmitted. */
__le32 rate_n_flags; /* RATE_MCS_* */
/* For non-agg: RTS + CTS + frame tx attempts time + ACK.
* For agg: RTS + CTS + aggregation tx time + block-ack time. */
__le16 wireless_media_time; /* uSecs */
/* * 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. * Bit fields: * 11- 0: AGG_TX_STATE_* status code * 15-12: 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. * 31-16: Sequence # for this frame's Tx cmd (not SSN!)
*/ union {
__le32 status;
DECLARE_FLEX_ARRAY(struct agg_tx_status, agg_status); /* for each agg frame */
} u;
} __packed;
/* * N_COMPRESSED_BA = 0xc5 (response only, not a command) * * Reports Block-Acknowledge from recipient station
*/ struct il_compressed_ba_resp {
__le32 sta_addr_lo32;
__le16 sta_addr_hi16;
__le16 reserved;
/* Index of recipient (BA-sending) station in uCode's station table */
u8 sta_id;
u8 tid;
__le16 seq_ctl;
__le64 bitmap;
__le16 scd_flow;
__le16 scd_ssn;
} __packed;
/* * C_TX_PWR_TBL = 0x97 (command, has simple generic response) * * See details under "TXPOWER" in 4965.h.
*/
/** * struct il3945_rate_scaling_cmd - Rate Scaling Command & Response * * C_RATE_SCALE = 0x47 (command, has simple generic response) * * NOTE: The table of rates passed to the uCode via the * RATE_SCALE command sets up the corresponding order of * rates used for all related commands, including rate * masks, etc. * * For example, if you set 9MB (PLCP 0x0f) as the first * rate in the rate table, the bit mask for that rate * when passed through ofdm_basic_rates on the C_RXON * command would be bit 0 (1 << 0)
*/ struct il3945_rate_scaling_info {
__le16 rate_n_flags;
u8 try_cnt;
u8 next_rate_idx;
} __packed;
/** * struct il_link_qual_general_params * * Used in C_TX_LINK_QUALITY_CMD
*/ struct il_link_qual_general_params {
u8 flags;
/* No entries at or above this (driver chosen) idx contain MIMO */
u8 mimo_delimiter;
/* Best single antenna to use for single stream (legacy, SISO). */
u8 single_stream_ant_msk; /* LINK_QUAL_ANT_* */
/* Best antennas to use for MIMO (unused for 4965, assumes both). */
u8 dual_stream_ant_msk; /* LINK_QUAL_ANT_* */
/* * If driver needs to use different initial rates for different * EDCA QOS access categories (as implemented by tx fifos 0-3), * this table will set that up, by indicating the idxes in the * rs_table[LINK_QUAL_MAX_RETRY_NUM] rate table at which to start. * Otherwise, driver should set all entries to 0. * * Entry usage: * 0 = Background, 1 = Best Effort (normal), 2 = Video, 3 = Voice * TX FIFOs above 3 use same value (typically 0) as TX FIFO 3.
*/
u8 start_rate_idx[LINK_QUAL_AC_NUM];
} __packed;
/** * struct il_link_qual_agg_params * * Used in C_TX_LINK_QUALITY_CMD
*/ struct il_link_qual_agg_params {
/* *Maximum number of uSec in aggregation. * default set to 4000 (4 milliseconds) if not configured in .cfg
*/
__le16 agg_time_limit;
/* * Number of Tx retries allowed for a frame, before that frame will * no longer be considered for the start of an aggregation sequence * (scheduler will then try to tx it as single frame). * Driver should set this to 3.
*/
u8 agg_dis_start_th;
/* * Maximum number of frames in aggregation. * 0 = no limit (default). 1 = no aggregation. * Other values = max # frames in aggregation.
*/
u8 agg_frame_cnt_limit;
__le32 reserved;
} __packed;
/* * C_TX_LINK_QUALITY_CMD = 0x4e (command, has simple generic response) * * For 4965 devices only; 3945 uses C_RATE_SCALE. * * Each station in the 4965 device's internal station table has its own table * of 16 * Tx rates and modulation modes (e.g. legacy/SISO/MIMO) for retrying Tx when * an ACK is not received. This command replaces the entire table for * one station. * * NOTE: Station must already be in 4965 device's station table. * Use C_ADD_STA. * * The rate scaling procedures described below work well. Of course, other * procedures are possible, and may work better for particular environments. * * * FILLING THE RATE TBL * * Given a particular initial rate and mode, as determined by the rate * scaling algorithm described below, the Linux driver uses the following * formula to fill the rs_table[LINK_QUAL_MAX_RETRY_NUM] rate table in the * Link Quality command: * * * 1) If using High-throughput (HT) (SISO or MIMO) initial rate: * a) Use this same initial rate for first 3 entries. * b) Find next lower available rate using same mode (SISO or MIMO), * use for next 3 entries. If no lower rate available, switch to * legacy mode (no HT40 channel, no MIMO, no short guard interval). * c) If using MIMO, set command's mimo_delimiter to number of entries * using MIMO (3 or 6). * d) After trying 2 HT rates, switch to legacy mode (no HT40 channel, * no MIMO, no short guard interval), at the next lower bit rate * (e.g. if second HT bit rate was 54, try 48 legacy), and follow * legacy procedure for remaining table entries. * * 2) If using legacy initial rate: * a) Use the initial rate for only one entry. * b) For each following entry, reduce the rate to next lower available * rate, until reaching the lowest available rate. * c) When reducing rate, also switch antenna selection. * d) Once lowest available rate is reached, repeat this rate until * rate table is filled (16 entries), switching antenna each entry. * * * ACCUMULATING HISTORY * * The rate scaling algorithm for 4965 devices, as implemented in Linux driver, * uses two sets of frame Tx success history: One for the current/active * modulation mode, and one for a speculative/search mode that is being * attempted. If the speculative mode turns out to be more effective (i.e. * actual transfer rate is better), then the driver continues to use the * speculative mode as the new current active mode. * * Each history set contains, separately for each possible rate, data for a * sliding win of the 62 most recent tx attempts at that rate. The data * includes a shifting bitmap of success(1)/failure(0), and sums of successful * and attempted frames, from which the driver can additionally calculate a * success ratio (success / attempted) and number of failures * (attempted - success), and control the size of the win (attempted). * The driver uses the bit map to remove successes from the success sum, as * the oldest tx attempts fall out of the win. * * When the 4965 device makes multiple tx attempts for a given frame, each * attempt might be at a different rate, and have different modulation * characteristics (e.g. antenna, fat channel, short guard interval), as set * up in the rate scaling table in the Link Quality command. The driver must * determine which rate table entry was used for each tx attempt, to determine * which rate-specific history to update, and record only those attempts that * match the modulation characteristics of the history set. * * When using block-ack (aggregation), all frames are transmitted at the same * rate, since there is no per-attempt acknowledgment from the destination * station. The Tx response struct il_tx_resp indicates the Tx rate in * rate_n_flags field. After receiving a block-ack, the driver can update * history for the entire block all at once. * * * FINDING BEST STARTING RATE: * * When working with a selected initial modulation mode (see below), the * driver attempts to find a best initial rate. The initial rate is the * first entry in the Link Quality command's rate table. * * 1) Calculate actual throughput (success ratio * expected throughput, see * table below) for current initial rate. Do this only if enough frames * have been attempted to make the value meaningful: at least 6 failed * tx attempts, or at least 8 successes. If not enough, don't try rate * scaling yet. * * 2) Find available rates adjacent to current initial rate. Available means: * a) supported by hardware && * b) supported by association && * c) within any constraints selected by user * * 3) Gather measured throughputs for adjacent rates. These might not have * enough history to calculate a throughput. That's okay, we might try * using one of them anyway! * * 4) Try decreasing rate if, for current rate:
--> --------------------
--> maximum size reached
--> --------------------
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