iwlwifi: add comments to QOS and ADD_STA commands
Add comments to QOS and ADD_STA commands Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ben Cahill
David S. Miller
parent
80cc0c382d
commit
2054a00bb8
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@ -445,6 +445,23 @@ struct iwl3945_csa_notification {
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* Quality-of-Service (QOS) Commands & Responses:
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*
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*****************************************************************************/
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/**
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* struct iwl_ac_qos -- QOS timing params for REPLY_QOS_PARAM
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* One for each of 4 EDCA access categories in struct iwl_qosparam_cmd
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*
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* @cw_min: Contention window, start value in numbers of slots.
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* Should be a power-of-2, minus 1. Device's default is 0x0f.
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* @cw_max: Contention window, max value in numbers of slots.
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* Should be a power-of-2, minus 1. Device's default is 0x3f.
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* @aifsn: Number of slots in Arbitration Interframe Space (before
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* performing random backoff timing prior to Tx). Device default 1.
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* @edca_txop: Length of Tx opportunity, in uSecs. Device default is 0.
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*
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* Device will automatically increase contention window by (2*CW) + 1 for each
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* transmission retry. Device uses cw_max as a bit mask, ANDed with new CW
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* value, to cap the CW value.
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*/
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struct iwl3945_ac_qos {
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__le16 cw_min;
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__le16 cw_max;
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@ -458,14 +475,14 @@ struct iwl3945_ac_qos {
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#define QOS_PARAM_FLG_TGN_MSK __constant_cpu_to_le32(0x02)
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#define QOS_PARAM_FLG_TXOP_TYPE_MSK __constant_cpu_to_le32(0x10)
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/*
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* TXFIFO Queue number defines
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*/
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/* number of Access categories (AC) (EDCA), queues 0..3 */
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/* Number of Access Categories (AC) (EDCA), queues 0..3 */
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#define AC_NUM 4
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/*
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* REPLY_QOS_PARAM = 0x13 (command, has simple generic response)
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*
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* This command sets up timings for each of the 4 prioritized EDCA Tx FIFOs
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* 0: Background, 1: Best Effort, 2: Video, 3: Voice.
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*/
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struct iwl3945_qosparam_cmd {
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__le32 qos_flags;
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@ -480,22 +497,21 @@ struct iwl3945_qosparam_cmd {
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/*
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* Multi station support
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*/
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/* Special, dedicated locations within device's station table */
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#define IWL_AP_ID 0
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#define IWL_MULTICAST_ID 1
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#define IWL_STA_ID 2
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#define IWL3945_BROADCAST_ID 24
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#define IWL3945_STATION_COUNT 25
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#define IWL4965_BROADCAST_ID 31
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#define IWL4965_STATION_COUNT 32
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#define IWL_STATION_COUNT 32 /* MAX(3945,4965)*/
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#define IWL_INVALID_STATION 255
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#define STA_FLG_TX_RATE_MSK __constant_cpu_to_le32(1<<2);
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#define STA_FLG_PWR_SAVE_MSK __constant_cpu_to_le32(1<<8);
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/* Use in mode field. 1: modify existing entry, 0: add new station entry */
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#define STA_CONTROL_MODIFY_MSK 0x01
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/* key flags __le16*/
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@ -508,13 +524,10 @@ struct iwl3945_qosparam_cmd {
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#define STA_KEY_FLG_KEYID_POS 8
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#define STA_KEY_FLG_INVALID __constant_cpu_to_le16(0x0800)
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/* modify flags */
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/* Flags indicate whether to modify vs. don't change various station params */
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#define STA_MODIFY_KEY_MASK 0x01
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#define STA_MODIFY_TID_DISABLE_TX 0x02
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#define STA_MODIFY_TX_RATE_MSK 0x04
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#define STA_MODIFY_ADDBA_TID_MSK 0x08
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#define STA_MODIFY_DELBA_TID_MSK 0x10
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#define BUILD_RAxTID(sta_id, tid) (((sta_id) << 4) + (tid))
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/*
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* Antenna masks:
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@ -537,6 +550,18 @@ struct iwl3945_keyinfo {
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u8 key[16]; /* 16-byte unicast decryption key */
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} __attribute__ ((packed));
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/**
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* struct sta_id_modify
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* @addr[ETH_ALEN]: station's MAC address
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* @sta_id: index of station in uCode's station table
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* @modify_mask: STA_MODIFY_*, 1: modify, 0: don't change
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*
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* Driver selects unused table index when adding new station,
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* or the index to a pre-existing station entry when modifying that station.
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* Some indexes have special purposes (IWL_AP_ID, index 0, is for AP).
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*
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* modify_mask flags select which parameters to modify vs. leave alone.
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*/
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struct sta_id_modify {
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u8 addr[ETH_ALEN];
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__le16 reserved1;
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@ -547,29 +572,67 @@ struct sta_id_modify {
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/*
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* REPLY_ADD_STA = 0x18 (command)
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*
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* The device contains an internal table of per-station information,
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* with info on security keys, aggregation parameters, and Tx rates for
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* initial Tx attempt and any retries (4965 uses REPLY_TX_LINK_QUALITY_CMD,
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* 3945 uses REPLY_RATE_SCALE to set up rate tables).
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*
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* REPLY_ADD_STA sets up the table entry for one station, either creating
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* a new entry, or modifying a pre-existing one.
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*
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* NOTE: RXON command (without "associated" bit set) wipes the station table
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* clean. Moving into RF_KILL state does this also. Driver must set up
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* new station table before transmitting anything on the RXON channel
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* (except active scans or active measurements; those commands carry
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* their own txpower/rate setup data).
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*
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* When getting started on a new channel, driver must set up the
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* IWL_BROADCAST_ID entry (last entry in the table). For a client
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* station in a BSS, once an AP is selected, driver sets up the AP STA
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* in the IWL_AP_ID entry (1st entry in the table). BROADCAST and AP
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* are all that are needed for a BSS client station. If the device is
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* used as AP, or in an IBSS network, driver must set up station table
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* entries for all STAs in network, starting with index IWL_STA_ID.
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*/
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struct iwl3945_addsta_cmd {
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u8 mode;
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u8 mode; /* 1: modify existing, 0: add new station */
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u8 reserved[3];
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struct sta_id_modify sta;
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struct iwl3945_keyinfo key;
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__le32 station_flags;
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__le32 station_flags_msk;
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__le32 station_flags; /* STA_FLG_* */
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__le32 station_flags_msk; /* STA_FLG_* */
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/* bit field to disable (1) or enable (0) Tx for Traffic ID (TID)
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* corresponding to bit (e.g. bit 5 controls TID 5).
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* Set modify_mask bit STA_MODIFY_TID_DISABLE_TX to use this field. */
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__le16 tid_disable_tx;
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__le16 rate_n_flags;
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/* TID for which to add block-ack support.
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* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
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u8 add_immediate_ba_tid;
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/* TID for which to remove block-ack support.
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* Set modify_mask bit STA_MODIFY_DELBA_TID_MSK to use this field. */
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u8 remove_immediate_ba_tid;
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/* Starting Sequence Number for added block-ack support.
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* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
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__le16 add_immediate_ba_ssn;
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} __attribute__ ((packed));
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#define ADD_STA_SUCCESS_MSK 0x1
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#define ADD_STA_NO_ROOM_IN_TABLE 0x2
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#define ADD_STA_NO_BLOCK_ACK_RESOURCE 0x4
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/*
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* REPLY_ADD_STA = 0x18 (response)
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*/
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struct iwl3945_add_sta_resp {
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u8 status;
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u8 status; /* ADD_STA_* */
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} __attribute__ ((packed));
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#define ADD_STA_SUCCESS_MSK 0x1
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/******************************************************************************
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* (4)
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@ -650,6 +650,23 @@ struct iwl4965_csa_notification {
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* Quality-of-Service (QOS) Commands & Responses:
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*
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*****************************************************************************/
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/**
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* struct iwl_ac_qos -- QOS timing params for REPLY_QOS_PARAM
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* One for each of 4 EDCA access categories in struct iwl_qosparam_cmd
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*
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* @cw_min: Contention window, start value in numbers of slots.
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* Should be a power-of-2, minus 1. Device's default is 0x0f.
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* @cw_max: Contention window, max value in numbers of slots.
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* Should be a power-of-2, minus 1. Device's default is 0x3f.
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* @aifsn: Number of slots in Arbitration Interframe Space (before
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* performing random backoff timing prior to Tx). Device default 1.
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* @edca_txop: Length of Tx opportunity, in uSecs. Device default is 0.
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*
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* Device will automatically increase contention window by (2*CW) + 1 for each
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* transmission retry. Device uses cw_max as a bit mask, ANDed with new CW
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* value, to cap the CW value.
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*/
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struct iwl4965_ac_qos {
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__le16 cw_min;
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__le16 cw_max;
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@ -663,14 +680,14 @@ struct iwl4965_ac_qos {
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#define QOS_PARAM_FLG_TGN_MSK __constant_cpu_to_le32(0x02)
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#define QOS_PARAM_FLG_TXOP_TYPE_MSK __constant_cpu_to_le32(0x10)
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/*
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* TXFIFO Queue number defines
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*/
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/* number of Access categories (AC) (EDCA), queues 0..3 */
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/* Number of Access Categories (AC) (EDCA), queues 0..3 */
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#define AC_NUM 4
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/*
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* REPLY_QOS_PARAM = 0x13 (command, has simple generic response)
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*
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* This command sets up timings for each of the 4 prioritized EDCA Tx FIFOs
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* 0: Background, 1: Best Effort, 2: Video, 3: Voice.
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*/
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struct iwl4965_qosparam_cmd {
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__le32 qos_flags;
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@ -685,13 +702,11 @@ struct iwl4965_qosparam_cmd {
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/*
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* Multi station support
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*/
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/* Special, dedicated locations within device's station table */
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#define IWL_AP_ID 0
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#define IWL_MULTICAST_ID 1
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#define IWL_STA_ID 2
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#define IWL3945_BROADCAST_ID 24
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#define IWL3945_STATION_COUNT 25
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#define IWL4965_BROADCAST_ID 31
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#define IWL4965_STATION_COUNT 32
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@ -708,6 +723,7 @@ struct iwl4965_qosparam_cmd {
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#define STA_FLG_AGG_MPDU_DENSITY_POS (23)
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#define STA_FLG_AGG_MPDU_DENSITY_MSK __constant_cpu_to_le32(7 << 23)
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/* Use in mode field. 1: modify existing entry, 0: add new station entry */
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#define STA_CONTROL_MODIFY_MSK 0x01
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/* key flags __le16*/
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@ -720,12 +736,15 @@ struct iwl4965_qosparam_cmd {
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#define STA_KEY_FLG_KEYID_POS 8
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#define STA_KEY_FLG_INVALID __constant_cpu_to_le16(0x0800)
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/* modify flags */
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/* Flags indicate whether to modify vs. don't change various station params */
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#define STA_MODIFY_KEY_MASK 0x01
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#define STA_MODIFY_TID_DISABLE_TX 0x02
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#define STA_MODIFY_TX_RATE_MSK 0x04
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#define STA_MODIFY_ADDBA_TID_MSK 0x08
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#define STA_MODIFY_DELBA_TID_MSK 0x10
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/* Receiver address (actually, Rx station's index into station table),
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* combined with Traffic ID (QOS priority), in format used by Tx Scheduler */
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#define BUILD_RAxTID(sta_id, tid) (((sta_id) << 4) + (tid))
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struct iwl4965_keyinfo {
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@ -737,6 +756,18 @@ struct iwl4965_keyinfo {
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u8 key[16]; /* 16-byte unicast decryption key */
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} __attribute__ ((packed));
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/**
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* struct sta_id_modify
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* @addr[ETH_ALEN]: station's MAC address
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* @sta_id: index of station in uCode's station table
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* @modify_mask: STA_MODIFY_*, 1: modify, 0: don't change
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*
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* Driver selects unused table index when adding new station,
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* or the index to a pre-existing station entry when modifying that station.
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* Some indexes have special purposes (IWL_AP_ID, index 0, is for AP).
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*
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* modify_mask flags select which parameters to modify vs. leave alone.
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*/
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struct sta_id_modify {
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u8 addr[ETH_ALEN];
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__le16 reserved1;
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@ -747,30 +778,70 @@ struct sta_id_modify {
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/*
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* REPLY_ADD_STA = 0x18 (command)
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*
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* The device contains an internal table of per-station information,
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* with info on security keys, aggregation parameters, and Tx rates for
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* initial Tx attempt and any retries (4965 uses REPLY_TX_LINK_QUALITY_CMD,
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* 3945 uses REPLY_RATE_SCALE to set up rate tables).
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*
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* REPLY_ADD_STA sets up the table entry for one station, either creating
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* a new entry, or modifying a pre-existing one.
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*
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* NOTE: RXON command (without "associated" bit set) wipes the station table
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* clean. Moving into RF_KILL state does this also. Driver must set up
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* new station table before transmitting anything on the RXON channel
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* (except active scans or active measurements; those commands carry
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* their own txpower/rate setup data).
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*
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* When getting started on a new channel, driver must set up the
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* IWL_BROADCAST_ID entry (last entry in the table). For a client
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* station in a BSS, once an AP is selected, driver sets up the AP STA
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* in the IWL_AP_ID entry (1st entry in the table). BROADCAST and AP
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* are all that are needed for a BSS client station. If the device is
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* used as AP, or in an IBSS network, driver must set up station table
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* entries for all STAs in network, starting with index IWL_STA_ID.
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*/
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struct iwl4965_addsta_cmd {
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u8 mode;
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u8 mode; /* 1: modify existing, 0: add new station */
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u8 reserved[3];
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struct sta_id_modify sta;
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struct iwl4965_keyinfo key;
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__le32 station_flags;
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__le32 station_flags_msk;
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__le32 station_flags; /* STA_FLG_* */
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__le32 station_flags_msk; /* STA_FLG_* */
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/* bit field to disable (1) or enable (0) Tx for Traffic ID (TID)
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* corresponding to bit (e.g. bit 5 controls TID 5).
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* Set modify_mask bit STA_MODIFY_TID_DISABLE_TX to use this field. */
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__le16 tid_disable_tx;
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__le16 reserved1;
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/* TID for which to add block-ack support.
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* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
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u8 add_immediate_ba_tid;
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/* TID for which to remove block-ack support.
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* Set modify_mask bit STA_MODIFY_DELBA_TID_MSK to use this field. */
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u8 remove_immediate_ba_tid;
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/* Starting Sequence Number for added block-ack support.
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* Set modify_mask bit STA_MODIFY_ADDBA_TID_MSK to use this field. */
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__le16 add_immediate_ba_ssn;
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__le32 reserved2;
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} __attribute__ ((packed));
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#define ADD_STA_SUCCESS_MSK 0x1
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#define ADD_STA_NO_ROOM_IN_TABLE 0x2
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#define ADD_STA_NO_BLOCK_ACK_RESOURCE 0x4
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#define ADD_STA_MODIFY_NON_EXIST_STA 0x8
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/*
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* REPLY_ADD_STA = 0x18 (response)
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*/
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struct iwl4965_add_sta_resp {
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u8 status;
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u8 status; /* ADD_STA_* */
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} __attribute__ ((packed));
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#define ADD_STA_SUCCESS_MSK 0x1
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/******************************************************************************
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* (4)
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