#include <net/mac80211.h>
#include <linux/etherdevice.h>
+#include <linux/sched.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-sta.h"
-#define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
-#define IWL_STA_UCODE_ACTIVE BIT(1) /* ucode entry is active */
-
u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
{
int i;
addr, priv->num_stations);
out:
+ /*
+ * It may be possible that more commands interacting with stations
+ * arrive before we completed processing the adding of
+ * station
+ */
+ if (ret != IWL_INVALID_STATION &&
+ (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
+ ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
+ (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
+ IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
+ ret);
+ ret = IWL_INVALID_STATION;
+ }
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
EXPORT_SYMBOL(iwl_find_station);
-int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
-{
- if (priv->iw_mode == NL80211_IFTYPE_STATION) {
- return IWL_AP_ID;
- } else {
- u8 *da = ieee80211_get_DA(hdr);
- return iwl_find_station(priv, da);
- }
-}
-EXPORT_SYMBOL(iwl_get_ra_sta_id);
-
/* priv->sta_lock must be held */
static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
{
sta_id);
break;
case ADD_STA_MODIFY_NON_EXIST_STA:
- IWL_ERR(priv, "Attempting to modify non-existing station %d \n",
+ IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
sta_id);
break;
default:
priv->stations[sta_id].sta.mode ==
STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
addsta->sta.addr);
-
- /*
- * Determine if we wanted to modify or add a station,
- * if adding a station succeeded we have some more initialization
- * to do when using station notification. TODO
- */
-
spin_unlock_irqrestore(&priv->sta_lock, flags);
}
.flags = flags,
.data = data,
};
+ u8 sta_id __maybe_unused = sta->sta.sta_id;
+
+ IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
+ sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
if (flags & CMD_ASYNC)
cmd.callback = iwl_add_sta_callback;
}
/**
- * iwl_add_station - Add station to tables in driver and device
+ * iwl_prep_station - Prepare station information for addition
+ *
+ * should be called with sta_lock held
*/
-u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap, u8 flags,
- struct ieee80211_sta_ht_cap *ht_info)
+static u8 iwl_prep_station(struct iwl_priv *priv, const u8 *addr,
+ bool is_ap,
+ struct ieee80211_sta_ht_cap *ht_info)
{
struct iwl_station_entry *station;
- unsigned long flags_spin;
int i;
- int sta_id = IWL_INVALID_STATION;
+ u8 sta_id = IWL_INVALID_STATION;
u16 rate;
- spin_lock_irqsave(&priv->sta_lock, flags_spin);
if (is_ap)
sta_id = IWL_AP_ID;
else if (is_broadcast_ether_addr(addr))
sta_id = i;
}
- /* These two conditions have the same outcome, but keep them separate
- since they have different meanings */
- if (unlikely(sta_id == IWL_INVALID_STATION)) {
- spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ /*
+ * 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 &&
+ if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
+ (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
!compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
- spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ 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",
/* Turn on both antennas for the station... */
station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
+ return sta_id;
+
+}
+
+#define STA_WAIT_TIMEOUT (HZ/2)
+
+/**
+ * iwl_add_station_common -
+ */
+int iwl_add_station_common(struct iwl_priv *priv, const u8 *addr,
+ bool is_ap,
+ struct ieee80211_sta_ht_cap *ht_info,
+ u8 *sta_id_r)
+{
+ struct iwl_station_entry *station;
+ unsigned long flags_spin;
+ int ret = 0;
+ u8 sta_id;
+
+ *sta_id_r = 0;
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ sta_id = iwl_prep_station(priv, addr, is_ap, ht_info);
+ if (sta_id == IWL_INVALID_STATION) {
+ IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
+ addr);
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ 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_irqrestore(&priv->sta_lock, flags_spin);
+ 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_irqrestore(&priv->sta_lock, flags_spin);
+ return -EEXIST;
+ }
+
+ priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
+ station = &priv->stations[sta_id];
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
/* Add station to device's station table */
- iwl_send_add_sta(priv, &station->sta, flags);
- return sta_id;
+ ret = iwl_send_add_sta(priv, &station->sta, CMD_SYNC);
+ if (ret) {
+ IWL_ERR(priv, "Adding station %pM failed.\n", station->sta.sta.addr);
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
+ priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ }
+ *sta_id_r = sta_id;
+ return ret;
+}
+EXPORT_SYMBOL(iwl_add_station_common);
+
+static struct iwl_link_quality_cmd *iwl_sta_alloc_lq(struct iwl_priv *priv,
+ u8 sta_id)
+{
+ int i, r;
+ struct iwl_link_quality_cmd *link_cmd;
+ u32 rate_flags;
+
+ 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;
+ }
+ /* 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 == IEEE80211_BAND_5GHZ)
+ r = IWL_RATE_6M_INDEX;
+ else
+ r = IWL_RATE_1M_INDEX;
+
+ for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
+ rate_flags = 0;
+ if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
+ rate_flags |= RATE_MCS_CCK_MSK;
+
+ rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
+ RATE_MCS_ANT_POS;
+
+ link_cmd->rs_table[i].rate_n_flags =
+ iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
+ r = iwl_get_prev_ieee_rate(r);
+ }
+ link_cmd->general_params.single_stream_ant_msk =
+ first_antenna(priv->hw_params.valid_tx_ant);
+
+ link_cmd->general_params.dual_stream_ant_msk =
+ priv->hw_params.valid_tx_ant &
+ ~first_antenna(priv->hw_params.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->hw_params.valid_tx_ant) == 2) {
+ link_cmd->general_params.dual_stream_ant_msk =
+ priv->hw_params.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;
+
+ return link_cmd;
}
-EXPORT_SYMBOL(iwl_add_station);
-static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const u8 *addr)
+/*
+ * iwl_add_local_station - Add stations not requested by mac80211
+ *
+ * This will be either the broadcast station or the bssid station needed by
+ * ad-hoc.
+ *
+ * Function sleeps.
+ */
+int iwl_add_local_station(struct iwl_priv *priv, const u8 *addr, bool init_rs,
+ u8 *sta_id_r)
{
+ int ret;
+ u8 sta_id;
+ struct iwl_link_quality_cmd *link_cmd;
unsigned long flags;
- u8 sta_id = iwl_find_station(priv, addr);
- BUG_ON(sta_id == IWL_INVALID_STATION);
+ if (*sta_id_r)
+ *sta_id_r = IWL_INVALID_STATION;
+
+ ret = iwl_add_station_common(priv, addr, 0, NULL, &sta_id);
+ if (ret) {
+ IWL_ERR(priv, "Unable to add station %pM\n", addr);
+ return ret;
+ }
- IWL_DEBUG_ASSOC(priv, "Removed STA from Ucode: %pM\n", addr);
+ if (sta_id_r)
+ *sta_id_r = sta_id;
spin_lock_irqsave(&priv->sta_lock, flags);
+ priv->stations[sta_id].used |= IWL_STA_LOCAL;
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
- /* Ucode must be active and driver must be non active */
- if (priv->stations[sta_id].used != IWL_STA_UCODE_ACTIVE)
- IWL_ERR(priv, "removed non active STA %d\n", sta_id);
+ if (init_rs) {
+ /* Set up default rate scaling table in device's station table */
+ link_cmd = iwl_sta_alloc_lq(priv, sta_id);
+ if (!link_cmd) {
+ IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
+ addr);
+ return -ENOMEM;
+ }
- priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
+ ret = iwl_send_lq_cmd(priv, link_cmd, CMD_SYNC, true);
+ if (ret)
+ IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
- memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
- spin_unlock_irqrestore(&priv->sta_lock, flags);
+ spin_lock_irqsave(&priv->sta_lock, flags);
+ priv->stations[sta_id].lq = link_cmd;
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
+ }
+
+ return 0;
}
+EXPORT_SYMBOL(iwl_add_local_station);
-static void iwl_remove_sta_callback(struct iwl_priv *priv,
- struct iwl_device_cmd *cmd,
- struct iwl_rx_packet *pkt)
+/**
+ * iwl_sta_ucode_deactivate - deactivate ucode status for a station
+ *
+ * priv->sta_lock must be held
+ */
+static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
{
- struct iwl_rem_sta_cmd *rm_sta =
- (struct iwl_rem_sta_cmd *)cmd->cmd.payload;
- const u8 *addr = rm_sta->addr;
+ /* 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);
- if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
- IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
- pkt->hdr.flags);
- return;
- }
+ priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
- switch (pkt->u.rem_sta.status) {
- case REM_STA_SUCCESS_MSK:
- iwl_sta_ucode_deactivate(priv, addr);
- break;
- default:
- IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
- break;
- }
+ 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,
- u8 flags)
+static int iwl_send_remove_station(struct iwl_priv *priv,
+ struct iwl_station_entry *station)
{
struct iwl_rx_packet *pkt;
int ret;
+ unsigned long flags_spin;
struct iwl_rem_sta_cmd rm_sta_cmd;
struct iwl_host_cmd cmd = {
.id = REPLY_REMOVE_STA,
.len = sizeof(struct iwl_rem_sta_cmd),
- .flags = flags,
+ .flags = CMD_SYNC,
.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);
+ memcpy(&rm_sta_cmd.addr, &station->sta.sta.addr , ETH_ALEN);
+
+ cmd.flags |= CMD_WANT_SKB;
- if (flags & CMD_ASYNC)
- cmd.callback = iwl_remove_sta_callback;
- else
- cmd.flags |= CMD_WANT_SKB;
ret = iwl_send_cmd(priv, &cmd);
- if (ret || (flags & CMD_ASYNC))
+ if (ret)
return ret;
pkt = (struct iwl_rx_packet *)cmd.reply_page;
if (!ret) {
switch (pkt->u.rem_sta.status) {
case REM_STA_SUCCESS_MSK:
- iwl_sta_ucode_deactivate(priv, addr);
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ iwl_sta_ucode_deactivate(priv, station->sta.sta.sta_id);
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
break;
default:
/**
* iwl_remove_station - Remove driver's knowledge of station.
*/
-int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
+int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
+ const u8 *addr)
{
- int sta_id = IWL_INVALID_STATION;
- int i, ret = -EINVAL;
+ struct iwl_station_entry *station;
unsigned long flags;
- spin_lock_irqsave(&priv->sta_lock, flags);
+ 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;
+ }
- if (is_ap)
- sta_id = IWL_AP_ID;
- else if (is_broadcast_ether_addr(addr))
- sta_id = priv->hw_params.bcast_sta_id;
- else
- for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
- if (priv->stations[i].used &&
- !compare_ether_addr(priv->stations[i].sta.sta.addr,
- addr)) {
- sta_id = i;
- break;
- }
+ IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
+ sta_id, addr);
- if (unlikely(sta_id == IWL_INVALID_STATION))
- goto out;
+ if (WARN_ON(sta_id == IWL_INVALID_STATION))
+ return -EINVAL;
- IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
- sta_id, addr);
+ spin_lock_irqsave(&priv->sta_lock, flags);
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
- IWL_ERR(priv, "Removing %pM but non DRIVER active\n",
+ IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
addr);
- goto out;
+ goto out_err;
}
if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
- IWL_ERR(priv, "Removing %pM but non UCODE active\n",
+ IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
addr);
- goto out;
+ goto out_err;
}
+ if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
+ kfree(priv->stations[sta_id].lq);
+ priv->stations[sta_id].lq = NULL;
+ }
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
BUG_ON(priv->num_stations < 0);
+ station = &priv->stations[sta_id];
spin_unlock_irqrestore(&priv->sta_lock, flags);
- ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
- return ret;
-out:
+ return iwl_send_remove_station(priv, station);
+out_err:
spin_unlock_irqrestore(&priv->sta_lock, flags);
- return ret;
+ return -EINVAL;
}
+EXPORT_SYMBOL_GPL(iwl_remove_station);
/**
- * iwl_clear_stations_table - Clear the driver's station table
+ * iwl_clear_ucode_stations - clear ucode station table bits
*
- * NOTE: This does not clear or otherwise alter the device's station table.
+ * 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_stations_table(struct iwl_priv *priv)
+void iwl_clear_ucode_stations(struct iwl_priv *priv)
{
- unsigned long flags;
int i;
+ unsigned long flags_spin;
+ bool cleared = false;
- spin_lock_irqsave(&priv->sta_lock, flags);
+ IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
+
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ for (i = 0; i < priv->hw_params.max_stations; i++) {
+ 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_irqrestore(&priv->sta_lock, flags_spin);
+
+ if (!cleared)
+ IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
+}
+EXPORT_SYMBOL(iwl_clear_ucode_stations);
- if (iwl_is_alive(priv) &&
- !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
- iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
- IWL_ERR(priv, "Couldn't clear the station table\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_station_entry *station;
+ unsigned long flags_spin;
+ int i;
+ bool found = false;
+ int ret;
- priv->num_stations = 0;
- memset(priv->stations, 0, sizeof(priv->stations));
+ if (!iwl_is_ready(priv)) {
+ IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
+ return;
+ }
- /* clean ucode key table bit map */
- priv->ucode_key_table = 0;
+ IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ for (i = 0; i < priv->hw_params.max_stations; i++) {
+ 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;
+ }
+ }
- /* keep track of static keys */
- for (i = 0; i < WEP_KEYS_MAX ; i++) {
- if (priv->wep_keys[i].key_size)
- set_bit(i, &priv->ucode_key_table);
+ for (i = 0; i < priv->hw_params.max_stations; i++) {
+ if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ station = &priv->stations[i];
+ ret = iwl_send_add_sta(priv, &priv->stations[i].sta, CMD_SYNC);
+ if (ret) {
+ IWL_ERR(priv, "Adding station %pM failed.\n",
+ station->sta.sta.addr);
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
+ priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ }
+ /*
+ * Rate scaling has already been initialized, send
+ * current LQ command
+ */
+ if (station->lq)
+ iwl_send_lq_cmd(priv, station->lq, CMD_SYNC, true);
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
+ }
}
- spin_unlock_irqrestore(&priv->sta_lock, flags);
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+ 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");
}
-EXPORT_SYMBOL(iwl_clear_stations_table);
+EXPORT_SYMBOL(iwl_restore_stations);
int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
{
}
EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
-int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
+static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
{
int i, not_empty = 0;
u8 buff[sizeof(struct iwl_wep_cmd) +
struct iwl_host_cmd cmd = {
.id = REPLY_WEPKEY,
.data = wep_cmd,
- .flags = CMD_ASYNC,
+ .flags = CMD_SYNC,
};
+ might_sleep();
+
memset(wep_cmd, 0, cmd_size +
(sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
else
return 0;
}
-EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
+
+int iwl_restore_default_wep_keys(struct iwl_priv *priv)
+{
+ WARN_ON(!mutex_is_locked(&priv->mutex));
+
+ return iwl_send_static_wepkey_cmd(priv, 0);
+}
+EXPORT_SYMBOL(iwl_restore_default_wep_keys);
int iwl_remove_default_wep_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf)
{
int ret;
- unsigned long flags;
- spin_lock_irqsave(&priv->sta_lock, flags);
+ WARN_ON(!mutex_is_locked(&priv->mutex));
+
IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
keyconf->keyidx);
- if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
- IWL_ERR(priv, "index %d not used in uCode key table.\n",
- keyconf->keyidx);
-
- priv->default_wep_key--;
memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
if (iwl_is_rfkill(priv)) {
IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n");
- spin_unlock_irqrestore(&priv->sta_lock, flags);
+ /* but keys in device are clear anyway so return success */
return 0;
}
ret = iwl_send_static_wepkey_cmd(priv, 1);
IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
keyconf->keyidx, ret);
- spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
struct ieee80211_key_conf *keyconf)
{
int ret;
- unsigned long flags;
+
+ WARN_ON(!mutex_is_locked(&priv->mutex));
if (keyconf->keylen != WEP_KEY_LEN_128 &&
keyconf->keylen != WEP_KEY_LEN_64) {
keyconf->hw_key_idx = HW_KEY_DEFAULT;
priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;
- spin_lock_irqsave(&priv->sta_lock, flags);
- priv->default_wep_key++;
-
- if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
- IWL_ERR(priv, "index %d already used in uCode key table.\n",
- keyconf->keyidx);
-
priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
keyconf->keylen);
ret = iwl_send_static_wepkey_cmd(priv, 0);
IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
keyconf->keylen, keyconf->keyidx, ret);
- spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
if (iwl_is_rfkill(priv)) {
- IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled. \n");
+ IWL_DEBUG_WEP(priv, "Not sending REPLY_ADD_STA command because RFKILL enabled.\n");
spin_unlock_irqrestore(&priv->sta_lock, flags);
return 0;
}
}
#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_link_quality_cmd *lq)
+{
+ int i;
+ struct iwl_ht_config *ht_conf = &priv->current_ht_config;
+
+ if (ht_conf->is_ht)
+ return true;
+
+ IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
+ priv->active_rxon.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_link_quality_cmd *lq, u8 flags)
+ struct iwl_link_quality_cmd *lq, u8 flags, bool init)
{
+ int ret = 0;
+ unsigned long flags_spin;
+
struct iwl_host_cmd cmd = {
.id = REPLY_TX_LINK_QUALITY_CMD,
.len = sizeof(struct iwl_link_quality_cmd),
.data = lq,
};
- if ((lq->sta_id == 0xFF) &&
- (priv->iw_mode == NL80211_IFTYPE_ADHOC))
+ if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
return -EINVAL;
- if (lq->sta_id == 0xFF)
- lq->sta_id = IWL_AP_ID;
-
iwl_dump_lq_cmd(priv, lq);
+ BUG_ON(init && (cmd.flags & CMD_ASYNC));
- if (iwl_is_associated(priv) && priv->assoc_station_added)
- return iwl_send_cmd(priv, &cmd);
-
- return 0;
-}
-EXPORT_SYMBOL(iwl_send_lq_cmd);
-
-/**
- * iwl_sta_init_lq - Initialize a station's hardware rate table
- *
- * The uCode's station table contains a table of fallback rates
- * for automatic fallback during transmission.
- *
- * NOTE: This sets up a default set of values. These will be replaced later
- * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
- * rc80211_simple.
- *
- * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
- * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
- * which requires station table entry to exist).
- */
-static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
-{
- int i, r;
- struct iwl_link_quality_cmd link_cmd = {
- .reserved1 = 0,
- };
- u32 rate_flags;
-
- /* 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 (is_ap)
- r = IWL_RATE_54M_INDEX;
- else if (priv->band == IEEE80211_BAND_5GHZ)
- r = IWL_RATE_6M_INDEX;
+ if (is_lq_table_valid(priv, lq))
+ ret = iwl_send_cmd(priv, &cmd);
else
- r = IWL_RATE_1M_INDEX;
-
- for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
- rate_flags = 0;
- if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
- rate_flags |= RATE_MCS_CCK_MSK;
+ ret = -EINVAL;
- rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
- RATE_MCS_ANT_POS;
+ if (cmd.flags & CMD_ASYNC)
+ return ret;
- link_cmd.rs_table[i].rate_n_flags =
- iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
- r = iwl_get_prev_ieee_rate(r);
+ if (init) {
+ IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
+ lq->sta_id);
+ spin_lock_irqsave(&priv->sta_lock, flags_spin);
+ priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
+ spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
}
-
- link_cmd.general_params.single_stream_ant_msk =
- first_antenna(priv->hw_params.valid_tx_ant);
- link_cmd.general_params.dual_stream_ant_msk = 3;
- 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);
-
- /* Update the rate scaling for control frame Tx to AP */
- link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
-
- iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
- sizeof(link_cmd), &link_cmd, NULL);
+ return ret;
}
+EXPORT_SYMBOL(iwl_send_lq_cmd);
/**
- * iwl_rxon_add_station - add station into station table.
+ * iwl_alloc_bcast_station - add broadcast station into driver's station table.
*
- * there is only one AP station with id= IWL_AP_ID
- * NOTE: mutex must be held before calling this function
+ * 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 iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
+int iwl_alloc_bcast_station(struct iwl_priv *priv, bool init_lq)
{
- struct ieee80211_sta *sta;
- struct ieee80211_sta_ht_cap ht_config;
- struct ieee80211_sta_ht_cap *cur_ht_config = NULL;
+ struct iwl_link_quality_cmd *link_cmd;
+ unsigned long flags;
u8 sta_id;
- /*
- * Set HT capabilities. It is ok to set this struct even if not using
- * HT config: the priv->current_ht_config.is_ht flag will just be false
- */
- rcu_read_lock();
- sta = ieee80211_find_sta(priv->vif, addr);
- if (sta) {
- memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
- cur_ht_config = &ht_config;
- }
- rcu_read_unlock();
-
- /* Add station to device's station table */
- sta_id = iwl_add_station(priv, addr, is_ap, CMD_SYNC, cur_ht_config);
-
- /* Set up default rate scaling table in device's station table */
- iwl_sta_init_lq(priv, addr, is_ap);
-
- return sta_id;
-}
-EXPORT_SYMBOL(iwl_rxon_add_station);
-
-/**
- * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
- *
- * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
- * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
- * which requires station table entry to exist).
- */
-static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
-{
- int i, r;
- struct iwl_link_quality_cmd link_cmd = {
- .reserved1 = 0,
- };
- u32 rate_flags;
+ spin_lock_irqsave(&priv->sta_lock, flags);
+ sta_id = iwl_prep_station(priv, iwl_bcast_addr, false, NULL);
+ if (sta_id == IWL_INVALID_STATION) {
+ IWL_ERR(priv, "Unable to prepare broadcast station\n");
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
- /* 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 == IEEE80211_BAND_5GHZ)
- r = IWL_RATE_6M_INDEX;
- else
- r = IWL_RATE_1M_INDEX;
+ return -EINVAL;
+ }
- for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
- rate_flags = 0;
- if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
- rate_flags |= RATE_MCS_CCK_MSK;
+ priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
+ priv->stations[sta_id].used |= IWL_STA_BCAST;
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
- rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
- RATE_MCS_ANT_POS;
+ if (init_lq) {
+ link_cmd = iwl_sta_alloc_lq(priv, sta_id);
+ if (!link_cmd) {
+ IWL_ERR(priv,
+ "Unable to initialize rate scaling for bcast station.\n");
+ return -ENOMEM;
+ }
- link_cmd.rs_table[i].rate_n_flags =
- iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
- r = iwl_get_prev_ieee_rate(r);
+ spin_lock_irqsave(&priv->sta_lock, flags);
+ priv->stations[sta_id].lq = link_cmd;
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
}
- link_cmd.general_params.single_stream_ant_msk =
- first_antenna(priv->hw_params.valid_tx_ant);
- link_cmd.general_params.dual_stream_ant_msk = 3;
- 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);
-
- /* Update the rate scaling for control frame Tx to AP */
- link_cmd.sta_id = priv->hw_params.bcast_sta_id;
-
- iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
- sizeof(link_cmd), &link_cmd, NULL);
+ return 0;
}
+EXPORT_SYMBOL_GPL(iwl_alloc_bcast_station);
-
-/**
- * iwl_add_bcast_station - add broadcast station into station table.
- */
-void iwl_add_bcast_station(struct iwl_priv *priv)
+void iwl_dealloc_bcast_station(struct iwl_priv *priv)
{
- IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
- iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
-
- /* Set up default rate scaling table in device's station table */
- iwl_sta_init_bcast_lq(priv);
-}
-EXPORT_SYMBOL(iwl_add_bcast_station);
+ unsigned long flags;
+ int i;
-/**
- * iwl3945_add_bcast_station - add broadcast station into station table.
- */
-void iwl3945_add_bcast_station(struct iwl_priv *priv)
-{
- IWL_DEBUG_INFO(priv, "Adding broadcast station to station table\n");
- iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
+ spin_lock_irqsave(&priv->sta_lock, flags);
+ for (i = 0; i < priv->hw_params.max_stations; i++) {
+ if (!(priv->stations[i].used & IWL_STA_BCAST))
+ continue;
+
+ priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
+ priv->num_stations--;
+ BUG_ON(priv->num_stations < 0);
+ kfree(priv->stations[i].lq);
+ priv->stations[i].lq = NULL;
+ }
+ spin_unlock_irqrestore(&priv->sta_lock, flags);
}
-EXPORT_SYMBOL(iwl3945_add_bcast_station);
+EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_station);
/**
* iwl_get_sta_id - Find station's index within station table
/* If we are a client station in a BSS network, use the special
* AP station entry (that's the only station we communicate with) */
case NL80211_IFTYPE_STATION:
+ /*
+ * If addition of station not complete yet, which means
+ * that rate scaling has not been initialized, then return
+ * the broadcast station.
+ */
+ if (!(priv->stations[IWL_AP_ID].used & IWL_STA_UCODE_ACTIVE))
+ return priv->hw_params.bcast_sta_id;
return IWL_AP_ID;
/* If we are an AP, then find the station, or use BCAST */
if (sta_id != IWL_INVALID_STATION)
return sta_id;
- /* Create new station table entry */
- sta_id = iwl_add_station(priv, hdr->addr1, false,
- CMD_ASYNC, NULL);
-
- if (sta_id != IWL_INVALID_STATION)
- return sta_id;
-
IWL_DEBUG_DROP(priv, "Station %pM not in station map. "
"Defaulting to broadcast...\n",
hdr->addr1);
iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
+EXPORT_SYMBOL(iwl_sta_modify_sleep_tx_count);
+
+int iwl_mac_sta_remove(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta)
+{
+ struct iwl_priv *priv = hw->priv;
+ struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
+ int ret;
+
+ IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
+ sta->addr);
+ ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
+ if (ret)
+ IWL_ERR(priv, "Error removing station %pM\n",
+ sta->addr);
+ return ret;
+}
+EXPORT_SYMBOL(iwl_mac_sta_remove);
projects / linux.git / blobdiff