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linux-zen-server/drivers/net/wireless/intel/iwlwifi/dvm/sta.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
*
* Copyright(c) 2003 - 2014, 2022 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*****************************************************************************/
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include "iwl-trans.h"
#include "dev.h"
#include "agn.h"
const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
{
lockdep_assert_held(&priv->sta_lock);
if (sta_id >= IWLAGN_STATION_COUNT) {
IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
return -EINVAL;
}
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
"addr %pM\n",
sta_id, priv->stations[sta_id].sta.sta.addr);
if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
IWL_DEBUG_ASSOC(priv,
"STA id %u addr %pM already present in uCode "
"(according to driver)\n",
sta_id, priv->stations[sta_id].sta.sta.addr);
} else {
priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
sta_id, priv->stations[sta_id].sta.sta.addr);
}
return 0;
}
static void iwl_process_add_sta_resp(struct iwl_priv *priv,
struct iwl_rx_packet *pkt)
{
struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
spin_lock_bh(&priv->sta_lock);
switch (add_sta_resp->status) {
case ADD_STA_SUCCESS_MSK:
IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
break;
case ADD_STA_NO_ROOM_IN_TABLE:
IWL_ERR(priv, "Adding station failed, no room in table.\n");
break;
case ADD_STA_NO_BLOCK_ACK_RESOURCE:
IWL_ERR(priv,
"Adding station failed, no block ack resource.\n");
break;
case ADD_STA_MODIFY_NON_EXIST_STA:
IWL_ERR(priv, "Attempting to modify non-existing station\n");
break;
default:
IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
add_sta_resp->status);
break;
}
spin_unlock_bh(&priv->sta_lock);
}
void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
iwl_process_add_sta_resp(priv, pkt);
}
int iwl_send_add_sta(struct iwl_priv *priv,
struct iwl_addsta_cmd *sta, u8 flags)
{
int ret = 0;
struct iwl_host_cmd cmd = {
.id = REPLY_ADD_STA,
.flags = flags,
.data = { sta, },
.len = { sizeof(*sta), },
};
u8 sta_id __maybe_unused = sta->sta.sta_id;
struct iwl_rx_packet *pkt;
struct iwl_add_sta_resp *add_sta_resp;
IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
if (!(flags & CMD_ASYNC)) {
cmd.flags |= CMD_WANT_SKB;
might_sleep();
}
ret = iwl_dvm_send_cmd(priv, &cmd);
if (ret || (flags & CMD_ASYNC))
return ret;
pkt = cmd.resp_pkt;
add_sta_resp = (void *)pkt->data;
/* debug messages are printed in the handler */
if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
spin_lock_bh(&priv->sta_lock);
ret = iwl_sta_ucode_activate(priv, sta_id);
spin_unlock_bh(&priv->sta_lock);
} else {
ret = -EIO;
}
iwl_free_resp(&cmd);
return ret;
}
bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_sta *sta)
{
if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
return false;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (priv->disable_ht40)
return false;
#endif
/* special case for RXON */
if (!sta)
return true;
return sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40;
}
static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
struct ieee80211_sta *sta,
struct iwl_rxon_context *ctx,
__le32 *flags, __le32 *mask)
{
struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
*mask = STA_FLG_RTS_MIMO_PROT_MSK |
STA_FLG_MIMO_DIS_MSK |
STA_FLG_HT40_EN_MSK |
STA_FLG_MAX_AGG_SIZE_MSK |
STA_FLG_AGG_MPDU_DENSITY_MSK;
*flags = 0;
if (!sta || !sta_ht_inf->ht_supported)
return;
IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
sta->addr,
(sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ?
"static" :
(sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ?
"dynamic" : "disabled");
switch (sta->deflink.smps_mode) {
case IEEE80211_SMPS_STATIC:
*flags |= STA_FLG_MIMO_DIS_MSK;
break;
case IEEE80211_SMPS_DYNAMIC:
*flags |= STA_FLG_RTS_MIMO_PROT_MSK;
break;
case IEEE80211_SMPS_OFF:
break;
default:
IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
break;
}
*flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
*flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
*flags |= STA_FLG_HT40_EN_MSK;
}
int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
struct ieee80211_sta *sta)
{
u8 sta_id = iwl_sta_id(sta);
__le32 flags, mask;
struct iwl_addsta_cmd cmd;
if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
return -EINVAL;
iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.station_flags &= ~mask;
priv->stations[sta_id].sta.station_flags |= flags;
spin_unlock_bh(&priv->sta_lock);
memset(&cmd, 0, sizeof(cmd));
cmd.mode = STA_CONTROL_MODIFY_MSK;
cmd.station_flags_msk = mask;
cmd.station_flags = flags;
cmd.sta.sta_id = sta_id;
return iwl_send_add_sta(priv, &cmd, 0);
}
static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
struct ieee80211_sta *sta,
struct iwl_rxon_context *ctx)
{
__le32 flags, mask;
iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
lockdep_assert_held(&priv->sta_lock);
priv->stations[index].sta.station_flags &= ~mask;
priv->stations[index].sta.station_flags |= flags;
}
/*
* iwl_prep_station - Prepare station information for addition
*
* should be called with sta_lock held
*/
u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
{
struct iwl_station_entry *station;
int i;
u8 sta_id = IWL_INVALID_STATION;
if (is_ap)
sta_id = ctx->ap_sta_id;
else if (is_broadcast_ether_addr(addr))
sta_id = ctx->bcast_sta_id;
else
for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
if (ether_addr_equal(priv->stations[i].sta.sta.addr,
addr)) {
sta_id = i;
break;
}
if (!priv->stations[i].used &&
sta_id == IWL_INVALID_STATION)
sta_id = i;
}
/*
* These two conditions have the same outcome, but keep them
* separate
*/
if (unlikely(sta_id == IWL_INVALID_STATION))
return sta_id;
/*
* uCode is not able to deal with multiple requests to add a
* station. Keep track if one is in progress so that we do not send
* another.
*/
if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
IWL_DEBUG_INFO(priv, "STA %d already in process of being "
"added.\n", sta_id);
return sta_id;
}
if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
"adding again.\n", sta_id, addr);
return sta_id;
}
station = &priv->stations[sta_id];
station->used = IWL_STA_DRIVER_ACTIVE;
IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
sta_id, addr);
priv->num_stations++;
/* Set up the REPLY_ADD_STA command to send to device */
memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
memcpy(station->sta.sta.addr, addr, ETH_ALEN);
station->sta.mode = 0;
station->sta.sta.sta_id = sta_id;
station->sta.station_flags = ctx->station_flags;
station->ctxid = ctx->ctxid;
if (sta) {
struct iwl_station_priv *sta_priv;
sta_priv = (void *)sta->drv_priv;
sta_priv->ctx = ctx;
}
/*
* OK to call unconditionally, since local stations (IBSS BSSID
* STA and broadcast STA) pass in a NULL sta, and mac80211
* doesn't allow HT IBSS.
*/
iwl_set_ht_add_station(priv, sta_id, sta, ctx);
return sta_id;
}
#define STA_WAIT_TIMEOUT (HZ/2)
/*
* iwl_add_station_common -
*/
int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
const u8 *addr, bool is_ap,
struct ieee80211_sta *sta, u8 *sta_id_r)
{
int ret = 0;
u8 sta_id;
struct iwl_addsta_cmd sta_cmd;
*sta_id_r = 0;
spin_lock_bh(&priv->sta_lock);
sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
addr);
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
/*
* uCode is not able to deal with multiple requests to add a
* station. Keep track if one is in progress so that we do not send
* another.
*/
if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
IWL_DEBUG_INFO(priv, "STA %d already in process of being "
"added.\n", sta_id);
spin_unlock_bh(&priv->sta_lock);
return -EEXIST;
}
if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
"adding again.\n", sta_id, addr);
spin_unlock_bh(&priv->sta_lock);
return -EEXIST;
}
priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
memcpy(&sta_cmd, &priv->stations[sta_id].sta,
sizeof(struct iwl_addsta_cmd));
spin_unlock_bh(&priv->sta_lock);
/* Add station to device's station table */
ret = iwl_send_add_sta(priv, &sta_cmd, 0);
if (ret) {
spin_lock_bh(&priv->sta_lock);
IWL_ERR(priv, "Adding station %pM failed.\n",
priv->stations[sta_id].sta.sta.addr);
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
spin_unlock_bh(&priv->sta_lock);
}
*sta_id_r = sta_id;
return ret;
}
/*
* iwl_sta_ucode_deactivate - deactivate ucode status for a station
*/
static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
{
lockdep_assert_held(&priv->sta_lock);
/* Ucode must be active and driver must be non active */
if ((priv->stations[sta_id].used &
(IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
IWL_STA_UCODE_ACTIVE)
IWL_ERR(priv, "removed non active STA %u\n", sta_id);
priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
}
static int iwl_send_remove_station(struct iwl_priv *priv,
const u8 *addr, int sta_id,
bool temporary)
{
struct iwl_rx_packet *pkt;
int ret;
struct iwl_rem_sta_cmd rm_sta_cmd;
struct iwl_rem_sta_resp *rem_sta_resp;
struct iwl_host_cmd cmd = {
.id = REPLY_REMOVE_STA,
.len = { sizeof(struct iwl_rem_sta_cmd), },
.data = { &rm_sta_cmd, },
};
memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
rm_sta_cmd.num_sta = 1;
memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
cmd.flags |= CMD_WANT_SKB;
ret = iwl_dvm_send_cmd(priv, &cmd);
if (ret)
return ret;
pkt = cmd.resp_pkt;
rem_sta_resp = (void *)pkt->data;
switch (rem_sta_resp->status) {
case REM_STA_SUCCESS_MSK:
if (!temporary) {
spin_lock_bh(&priv->sta_lock);
iwl_sta_ucode_deactivate(priv, sta_id);
spin_unlock_bh(&priv->sta_lock);
}
IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
break;
default:
ret = -EIO;
IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
break;
}
iwl_free_resp(&cmd);
return ret;
}
/*
* iwl_remove_station - Remove driver's knowledge of station.
*/
int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
const u8 *addr)
{
u8 tid;
if (!iwl_is_ready(priv)) {
IWL_DEBUG_INFO(priv,
"Unable to remove station %pM, device not ready.\n",
addr);
/*
* It is typical for stations to be removed when we are
* going down. Return success since device will be down
* soon anyway
*/
return 0;
}
IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
sta_id, addr);
if (WARN_ON(sta_id == IWL_INVALID_STATION))
return -EINVAL;
spin_lock_bh(&priv->sta_lock);
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
addr);
goto out_err;
}
if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
addr);
goto out_err;
}
if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
kfree(priv->stations[sta_id].lq);
priv->stations[sta_id].lq = NULL;
}
for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
memset(&priv->tid_data[sta_id][tid], 0,
sizeof(priv->tid_data[sta_id][tid]));
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
priv->num_stations--;
if (WARN_ON(priv->num_stations < 0))
priv->num_stations = 0;
spin_unlock_bh(&priv->sta_lock);
return iwl_send_remove_station(priv, addr, sta_id, false);
out_err:
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
const u8 *addr)
{
u8 tid;
if (!iwl_is_ready(priv)) {
IWL_DEBUG_INFO(priv,
"Unable to remove station %pM, device not ready.\n",
addr);
return;
}
IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
return;
spin_lock_bh(&priv->sta_lock);
WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
memset(&priv->tid_data[sta_id][tid], 0,
sizeof(priv->tid_data[sta_id][tid]));
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
priv->num_stations--;
if (WARN_ON_ONCE(priv->num_stations < 0))
priv->num_stations = 0;
spin_unlock_bh(&priv->sta_lock);
}
static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
{
int i, r;
u32 rate_flags = 0;
__le32 rate_n_flags;
lockdep_assert_held(&priv->mutex);
memset(link_cmd, 0, sizeof(*link_cmd));
/* Set up the rate scaling to start at selected rate, fall back
* all the way down to 1M in IEEE order, and then spin on 1M */
if (priv->band == NL80211_BAND_5GHZ)
r = IWL_RATE_6M_INDEX;
else if (ctx && ctx->vif && ctx->vif->p2p)
r = IWL_RATE_6M_INDEX;
else
r = IWL_RATE_1M_INDEX;
if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
RATE_MCS_ANT_POS;
rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
link_cmd->general_params.single_stream_ant_msk =
first_antenna(priv->nvm_data->valid_tx_ant);
link_cmd->general_params.dual_stream_ant_msk =
priv->nvm_data->valid_tx_ant &
~first_antenna(priv->nvm_data->valid_tx_ant);
if (!link_cmd->general_params.dual_stream_ant_msk) {
link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
} else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
link_cmd->general_params.dual_stream_ant_msk =
priv->nvm_data->valid_tx_ant;
}
link_cmd->agg_params.agg_dis_start_th =
LINK_QUAL_AGG_DISABLE_START_DEF;
link_cmd->agg_params.agg_time_limit =
cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
link_cmd->sta_id = sta_id;
}
/*
* iwl_clear_ucode_stations - clear ucode station table bits
*
* This function clears all the bits in the driver indicating
* which stations are active in the ucode. Call when something
* other than explicit station management would cause this in
* the ucode, e.g. unassociated RXON.
*/
void iwl_clear_ucode_stations(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
int i;
bool cleared = false;
IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (ctx && ctx->ctxid != priv->stations[i].ctxid)
continue;
if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
IWL_DEBUG_INFO(priv,
"Clearing ucode active for station %d\n", i);
priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
cleared = true;
}
}
spin_unlock_bh(&priv->sta_lock);
if (!cleared)
IWL_DEBUG_INFO(priv,
"No active stations found to be cleared\n");
}
/*
* iwl_restore_stations() - Restore driver known stations to device
*
* All stations considered active by driver, but not present in ucode, is
* restored.
*
* Function sleeps.
*/
void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
struct iwl_addsta_cmd sta_cmd;
static const struct iwl_link_quality_cmd zero_lq = {};
struct iwl_link_quality_cmd lq;
int i;
bool found = false;
int ret;
bool send_lq;
if (!iwl_is_ready(priv)) {
IWL_DEBUG_INFO(priv,
"Not ready yet, not restoring any stations.\n");
return;
}
IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (ctx->ctxid != priv->stations[i].ctxid)
continue;
if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
!(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
priv->stations[i].sta.sta.addr);
priv->stations[i].sta.mode = 0;
priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
found = true;
}
}
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
memcpy(&sta_cmd, &priv->stations[i].sta,
sizeof(struct iwl_addsta_cmd));
send_lq = false;
if (priv->stations[i].lq) {
if (priv->wowlan)
iwl_sta_fill_lq(priv, ctx, i, &lq);
else
memcpy(&lq, priv->stations[i].lq,
sizeof(struct iwl_link_quality_cmd));
if (memcmp(&lq, &zero_lq, sizeof(lq)))
send_lq = true;
}
spin_unlock_bh(&priv->sta_lock);
ret = iwl_send_add_sta(priv, &sta_cmd, 0);
if (ret) {
spin_lock_bh(&priv->sta_lock);
IWL_ERR(priv, "Adding station %pM failed.\n",
priv->stations[i].sta.sta.addr);
priv->stations[i].used &=
~IWL_STA_DRIVER_ACTIVE;
priv->stations[i].used &=
~IWL_STA_UCODE_INPROGRESS;
continue;
}
/*
* Rate scaling has already been initialized, send
* current LQ command
*/
if (send_lq)
iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
spin_lock_bh(&priv->sta_lock);
priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
}
}
spin_unlock_bh(&priv->sta_lock);
if (!found)
IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
"no stations to be restored.\n");
else
IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
"complete.\n");
}
int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
{
int i;
for (i = 0; i < priv->sta_key_max_num; i++)
if (!test_and_set_bit(i, &priv->ucode_key_table))
return i;
return WEP_INVALID_OFFSET;
}
void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
{
int i;
spin_lock_bh(&priv->sta_lock);
for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
if (!(priv->stations[i].used & IWL_STA_BCAST))
continue;
priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
priv->num_stations--;
if (WARN_ON(priv->num_stations < 0))
priv->num_stations = 0;
kfree(priv->stations[i].lq);
priv->stations[i].lq = NULL;
}
spin_unlock_bh(&priv->sta_lock);
}
#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_dump_lq_cmd(struct iwl_priv *priv,
struct iwl_link_quality_cmd *lq)
{
int i;
IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
lq->general_params.single_stream_ant_msk,
lq->general_params.dual_stream_ant_msk);
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
i, lq->rs_table[i].rate_n_flags);
}
#else
static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
struct iwl_link_quality_cmd *lq)
{
}
#endif
/*
* is_lq_table_valid() - Test one aspect of LQ cmd for validity
*
* It sometimes happens when a HT rate has been in use and we
* loose connectivity with AP then mac80211 will first tell us that the
* current channel is not HT anymore before removing the station. In such a
* scenario the RXON flags will be updated to indicate we are not
* communicating HT anymore, but the LQ command may still contain HT rates.
* Test for this to prevent driver from sending LQ command between the time
* RXON flags are updated and when LQ command is updated.
*/
static bool is_lq_table_valid(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct iwl_link_quality_cmd *lq)
{
int i;
if (ctx->ht.enabled)
return true;
IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
ctx->active.channel);
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
RATE_MCS_HT_MSK) {
IWL_DEBUG_INFO(priv,
"index %d of LQ expects HT channel\n",
i);
return false;
}
}
return true;
}
/*
* iwl_send_lq_cmd() - Send link quality command
* @init: This command is sent as part of station initialization right
* after station has been added.
*
* The link quality command is sent as the last step of station creation.
* This is the special case in which init is set and we call a callback in
* this case to clear the state indicating that station creation is in
* progress.
*/
int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
struct iwl_link_quality_cmd *lq, u8 flags, bool init)
{
int ret = 0;
struct iwl_host_cmd cmd = {
.id = REPLY_TX_LINK_QUALITY_CMD,
.len = { sizeof(struct iwl_link_quality_cmd), },
.flags = flags,
.data = { lq, },
};
if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
return -EINVAL;
spin_lock_bh(&priv->sta_lock);
if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
spin_unlock_bh(&priv->sta_lock);
iwl_dump_lq_cmd(priv, lq);
if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
return -EINVAL;
if (is_lq_table_valid(priv, ctx, lq))
ret = iwl_dvm_send_cmd(priv, &cmd);
else
ret = -EINVAL;
if (cmd.flags & CMD_ASYNC)
return ret;
if (init) {
IWL_DEBUG_INFO(priv, "init LQ command complete, "
"clearing sta addition status for sta %d\n",
lq->sta_id);
spin_lock_bh(&priv->sta_lock);
priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
spin_unlock_bh(&priv->sta_lock);
}
return ret;
}
static struct iwl_link_quality_cmd *
iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
u8 sta_id)
{
struct iwl_link_quality_cmd *link_cmd;
link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
if (!link_cmd) {
IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
return NULL;
}
iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
return link_cmd;
}
/*
* iwlagn_add_bssid_station - Add the special IBSS BSSID station
*
* Function sleeps.
*/
int iwlagn_add_bssid_station(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
const u8 *addr, u8 *sta_id_r)
{
int ret;
u8 sta_id;
struct iwl_link_quality_cmd *link_cmd;
if (sta_id_r)
*sta_id_r = IWL_INVALID_STATION;
ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
if (ret) {
IWL_ERR(priv, "Unable to add station %pM\n", addr);
return ret;
}
if (sta_id_r)
*sta_id_r = sta_id;
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].used |= IWL_STA_LOCAL;
spin_unlock_bh(&priv->sta_lock);
/* Set up default rate scaling table in device's station table */
link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
if (!link_cmd) {
IWL_ERR(priv,
"Unable to initialize rate scaling for station %pM.\n",
addr);
return -ENOMEM;
}
ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
if (ret)
IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].lq = link_cmd;
spin_unlock_bh(&priv->sta_lock);
return 0;
}
/*
* static WEP keys
*
* For each context, the device has a table of 4 static WEP keys
* (one for each key index) that is updated with the following
* commands.
*/
static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
bool send_if_empty)
{
int i, not_empty = 0;
u8 buff[sizeof(struct iwl_wep_cmd) +
sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
size_t cmd_size = sizeof(struct iwl_wep_cmd);
struct iwl_host_cmd cmd = {
.id = ctx->wep_key_cmd,
.data = { wep_cmd, },
};
might_sleep();
memset(wep_cmd, 0, cmd_size +
(sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
for (i = 0; i < WEP_KEYS_MAX ; i++) {
wep_cmd->key[i].key_index = i;
if (ctx->wep_keys[i].key_size) {
wep_cmd->key[i].key_offset = i;
not_empty = 1;
} else {
wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
}
wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
ctx->wep_keys[i].key_size);
}
wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
wep_cmd->num_keys = WEP_KEYS_MAX;
cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
cmd.len[0] = cmd_size;
if (not_empty || send_if_empty)
return iwl_dvm_send_cmd(priv, &cmd);
else
return 0;
}
int iwl_restore_default_wep_keys(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
lockdep_assert_held(&priv->mutex);
return iwl_send_static_wepkey_cmd(priv, ctx, false);
}
int iwl_remove_default_wep_key(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_key_conf *keyconf)
{
int ret;
lockdep_assert_held(&priv->mutex);
IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
keyconf->keyidx);
memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_WEP(priv,
"Not sending REPLY_WEPKEY command due to RFKILL.\n");
/* but keys in device are clear anyway so return success */
return 0;
}
ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
keyconf->keyidx, ret);
return ret;
}
int iwl_set_default_wep_key(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_key_conf *keyconf)
{
int ret;
lockdep_assert_held(&priv->mutex);
if (keyconf->keylen != WEP_KEY_LEN_128 &&
keyconf->keylen != WEP_KEY_LEN_64) {
IWL_DEBUG_WEP(priv,
"Bad WEP key length %d\n", keyconf->keylen);
return -EINVAL;
}
keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
keyconf->keylen);
ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
keyconf->keylen, keyconf->keyidx, ret);
return ret;
}
/*
* dynamic (per-station) keys
*
* The dynamic keys are a little more complicated. The device has
* a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
* These are linked to stations by a table that contains an index
* into the key table for each station/key index/{mcast,unicast},
* i.e. it's basically an array of pointers like this:
* key_offset_t key_mapping[NUM_STATIONS][4][2];
* (it really works differently, but you can think of it as such)
*
* The key uploading and linking happens in the same command, the
* add station command with STA_MODIFY_KEY_MASK.
*/
static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
if (sta)
return iwl_sta_id(sta);
/*
* The device expects GTKs for station interfaces to be
* installed as GTKs for the AP station. If we have no
* station ID, then use the ap_sta_id in that case.
*/
if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
return vif_priv->ctx->ap_sta_id;
return IWL_INVALID_STATION;
}
static int iwlagn_send_sta_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
u32 cmd_flags)
{
__le16 key_flags;
struct iwl_addsta_cmd sta_cmd;
size_t to_copy;
int i;
spin_lock_bh(&priv->sta_lock);
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
spin_unlock_bh(&priv->sta_lock);
key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
key_flags |= STA_KEY_FLG_CCMP;
memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
break;
case WLAN_CIPHER_SUITE_TKIP:
key_flags |= STA_KEY_FLG_TKIP;
sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
for (i = 0; i < 5; i++)
sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
/* keyconf may contain MIC rx/tx keys which iwl does not use */
to_copy = min_t(size_t, sizeof(sta_cmd.key.key), keyconf->keylen);
memcpy(sta_cmd.key.key, keyconf->key, to_copy);
break;
case WLAN_CIPHER_SUITE_WEP104:
key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
fallthrough;
case WLAN_CIPHER_SUITE_WEP40:
key_flags |= STA_KEY_FLG_WEP;
memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
break;
default:
WARN_ON(1);
return -EINVAL;
}
if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
key_flags |= STA_KEY_MULTICAST_MSK;
/* key pointer (offset) */
sta_cmd.key.key_offset = keyconf->hw_key_idx;
sta_cmd.key.key_flags = key_flags;
sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
}
void iwl_update_tkip_key(struct iwl_priv *priv,
struct ieee80211_vif *vif,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
{
u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
if (sta_id == IWL_INVALID_STATION)
return;
if (iwl_scan_cancel(priv)) {
/* cancel scan failed, just live w/ bad key and rely
briefly on SW decryption */
return;
}
iwlagn_send_sta_key(priv, keyconf, sta_id,
iv32, phase1key, CMD_ASYNC);
}
int iwl_remove_dynamic_key(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta)
{
struct iwl_addsta_cmd sta_cmd;
u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
__le16 key_flags;
/* if station isn't there, neither is the key */
if (sta_id == IWL_INVALID_STATION)
return -ENOENT;
spin_lock_bh(&priv->sta_lock);
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
sta_id = IWL_INVALID_STATION;
spin_unlock_bh(&priv->sta_lock);
if (sta_id == IWL_INVALID_STATION)
return 0;
lockdep_assert_held(&priv->mutex);
ctx->key_mapping_keys--;
IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
keyconf->keyidx, sta_id);
if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
IWL_ERR(priv, "offset %d not used in uCode key table.\n",
keyconf->hw_key_idx);
key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
STA_KEY_FLG_INVALID;
if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
key_flags |= STA_KEY_MULTICAST_MSK;
sta_cmd.key.key_flags = key_flags;
sta_cmd.key.key_offset = keyconf->hw_key_idx;
sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
return iwl_send_add_sta(priv, &sta_cmd, 0);
}
int iwl_set_dynamic_key(struct iwl_priv *priv,
struct iwl_rxon_context *ctx,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta)
{
struct ieee80211_key_seq seq;
u16 p1k[5];
int ret;
u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
const u8 *addr;
if (sta_id == IWL_INVALID_STATION)
return -EINVAL;
lockdep_assert_held(&priv->mutex);
keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
return -ENOSPC;
ctx->key_mapping_keys++;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
if (sta)
addr = sta->addr;
else /* station mode case only */
addr = ctx->active.bssid_addr;
/* pre-fill phase 1 key into device cache */
ieee80211_get_key_rx_seq(keyconf, 0, &seq);
ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
seq.tkip.iv32, p1k, 0);
break;
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
0, NULL, 0);
break;
default:
IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
ret = -EINVAL;
}
if (ret) {
ctx->key_mapping_keys--;
clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
}
IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
keyconf->cipher, keyconf->keylen, keyconf->keyidx,
sta ? sta->addr : NULL, ret);
return ret;
}
/*
* iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
*
* This adds the broadcast station into the driver's station table
* and marks it driver active, so that it will be restored to the
* device at the next best time.
*/
int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct iwl_link_quality_cmd *link_cmd;
u8 sta_id;
spin_lock_bh(&priv->sta_lock);
sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Unable to prepare broadcast station\n");
spin_unlock_bh(&priv->sta_lock);
return -EINVAL;
}
priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
priv->stations[sta_id].used |= IWL_STA_BCAST;
spin_unlock_bh(&priv->sta_lock);
link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
if (!link_cmd) {
IWL_ERR(priv,
"Unable to initialize rate scaling for bcast station.\n");
return -ENOMEM;
}
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].lq = link_cmd;
spin_unlock_bh(&priv->sta_lock);
return 0;
}
/*
* iwl_update_bcast_station - update broadcast station's LQ command
*
* Only used by iwlagn. Placed here to have all bcast station management
* code together.
*/
int iwl_update_bcast_station(struct iwl_priv *priv,
struct iwl_rxon_context *ctx)
{
struct iwl_link_quality_cmd *link_cmd;
u8 sta_id = ctx->bcast_sta_id;
link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
if (!link_cmd) {
IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
return -ENOMEM;
}
spin_lock_bh(&priv->sta_lock);
if (priv->stations[sta_id].lq)
kfree(priv->stations[sta_id].lq);
else
IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
priv->stations[sta_id].lq = link_cmd;
spin_unlock_bh(&priv->sta_lock);
return 0;
}
int iwl_update_bcast_stations(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx;
int ret = 0;
for_each_context(priv, ctx) {
ret = iwl_update_bcast_station(priv, ctx);
if (ret)
break;
}
return ret;
}
/*
* iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
*/
int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
{
struct iwl_addsta_cmd sta_cmd;
lockdep_assert_held(&priv->mutex);
/* Remove "disable" flag, to enable Tx for this TID */
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, 0);
}
int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
int tid, u16 ssn)
{
int sta_id;
struct iwl_addsta_cmd sta_cmd;
lockdep_assert_held(&priv->mutex);
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION)
return -ENXIO;
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, 0);
}
int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
int tid)
{
int sta_id;
struct iwl_addsta_cmd sta_cmd;
lockdep_assert_held(&priv->mutex);
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
return -ENXIO;
}
spin_lock_bh(&priv->sta_lock);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
spin_unlock_bh(&priv->sta_lock);
return iwl_send_add_sta(priv, &sta_cmd, 0);
}
void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
{
struct iwl_addsta_cmd cmd = {
.mode = STA_CONTROL_MODIFY_MSK,
.station_flags = STA_FLG_PWR_SAVE_MSK,
.station_flags_msk = STA_FLG_PWR_SAVE_MSK,
.sta.sta_id = sta_id,
.sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
.sleep_tx_count = cpu_to_le16(cnt),
};
iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
}