/******************************************************************************
*
* Copyright(c) 2003 - 2008 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.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-sta.h"
#include "iwl-helpers.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;
int start = 0;
int ret = IWL_INVALID_STATION;
unsigned long flags;
DECLARE_MAC_BUF(mac);
if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
(priv->iw_mode == IEEE80211_IF_TYPE_AP))
start = IWL_STA_ID;
if (is_broadcast_ether_addr(addr))
return priv->hw_params.bcast_sta_id;
spin_lock_irqsave(&priv->sta_lock, flags);
for (i = start; i < priv->hw_params.max_stations; i++)
if (priv->stations[i].used &&
(!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr))) {
ret = i;
goto out;
}
IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
print_mac(mac, addr), priv->num_stations);
out:
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 == IEEE80211_IF_TYPE_STA) {
return IWL_AP_ID;
} else {
u8 *da = ieee80211_get_DA(hdr);
return iwl_find_station(priv, da);
}
}
EXPORT_SYMBOL(iwl_get_ra_sta_id);
static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
{
unsigned long flags;
DECLARE_MAC_BUF(mac);
spin_lock_irqsave(&priv->sta_lock, flags);
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
IWL_ERROR("ACTIVATE a non DRIVER active station %d\n", sta_id);
priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
IWL_DEBUG_ASSOC("Added STA to Ucode: %s\n",
print_mac(mac, priv->stations[sta_id].sta.sta.addr));
spin_unlock_irqrestore(&priv->sta_lock, flags);
}
static int iwl_add_sta_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd, struct sk_buff *skb)
{
struct iwl_rx_packet *res = NULL;
u8 sta_id = cmd->cmd.addsta.sta.sta_id;
if (!skb) {
IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
return 1;
}
res = (struct iwl_rx_packet *)skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
res->hdr.flags);
return 1;
}
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
iwl_sta_ucode_activate(priv, sta_id);
/* fall through */
default:
IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
res->u.add_sta.status);
break;
}
/* We didn't cache the SKB; let the caller free it */
return 1;
}
int iwl_send_add_sta(struct iwl_priv *priv,
struct iwl_addsta_cmd *sta, u8 flags)
{
struct iwl_rx_packet *res = NULL;
int ret = 0;
u8 data[sizeof(*sta)];
struct iwl_host_cmd cmd = {
.id = REPLY_ADD_STA,
.meta.flags = flags,
.data = data,
};
if (flags & CMD_ASYNC)
cmd.meta.u.callback = iwl_add_sta_callback;
else
cmd.meta.flags |= CMD_WANT_SKB;
cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
ret = iwl_send_cmd(priv, &cmd);
if (ret || (flags & CMD_ASYNC))
return ret;
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
res->hdr.flags);
ret = -EIO;
}
if (ret == 0) {
switch (res->u.add_sta.status) {
case ADD_STA_SUCCESS_MSK:
iwl_sta_ucode_activate(priv, sta->sta.sta_id);
IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
break;
default:
ret = -EIO;
IWL_WARNING("REPLY_ADD_STA failed\n");
break;
}
}
priv->alloc_rxb_skb--;
dev_kfree_skb_any(cmd.meta.u.skb);
return ret;
}
EXPORT_SYMBOL(iwl_send_add_sta);
static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
struct ieee80211_ht_info *sta_ht_inf)
{
__le32 sta_flags;
u8 mimo_ps_mode;
if (!sta_ht_inf || !sta_ht_inf->ht_supported)
goto done;
mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
sta_flags = priv->stations[index].sta.station_flags;
sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
switch (mimo_ps_mode) {
case WLAN_HT_CAP_MIMO_PS_STATIC:
sta_flags |= STA_FLG_MIMO_DIS_MSK;
break;
case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
break;
case WLAN_HT_CAP_MIMO_PS_DISABLED:
break;
default:
IWL_WARNING("Invalid MIMO PS mode %d\n", mimo_ps_mode);
break;
}
sta_flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
sta_flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
sta_flags |= STA_FLG_FAT_EN_MSK;
else
sta_flags &= ~STA_FLG_FAT_EN_MSK;
priv->stations[index].sta.station_flags = sta_flags;
done:
return;
}
/**
* iwl_add_station_flags - Add station to tables in driver and device
*/
u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
u8 flags, struct ieee80211_ht_info *ht_info)
{
int i;
int sta_id = IWL_INVALID_STATION;
struct iwl_station_entry *station;
unsigned long flags_spin;
DECLARE_MAC_BUF(mac);
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 = priv->hw_params.bcast_sta_id;
else
for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
if (!compare_ether_addr(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
since they have different meanings */
if (unlikely(sta_id == IWL_INVALID_STATION)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
return sta_id;
}
if (priv->stations[sta_id].used &&
!compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
return sta_id;
}
station = &priv->stations[sta_id];
station->used = IWL_STA_DRIVER_ACTIVE;
IWL_DEBUG_ASSOC("Add STA to driver ID %d: %s\n",
sta_id, print_mac(mac, 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 = 0;
/* BCAST station and IBSS stations do not work in HT mode */
if (sta_id != priv->hw_params.bcast_sta_id &&
priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
iwl_set_ht_add_station(priv, sta_id, ht_info);
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;
}
EXPORT_SYMBOL(iwl_add_station_flags);
static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
{
unsigned long flags;
DECLARE_MAC_BUF(mac);
u8 sta_id = iwl_find_station(priv, addr);
BUG_ON(sta_id == IWL_INVALID_STATION);
IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
print_mac(mac, addr));
spin_lock_irqsave(&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_ERROR("removed non active STA %d\n", sta_id);
priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
spin_unlock_irqrestore(&priv->sta_lock, flags);
}
static int iwl_remove_sta_callback(struct iwl_priv *priv,
struct iwl_cmd *cmd, struct sk_buff *skb)
{
struct iwl_rx_packet *res = NULL;
const char *addr = cmd->cmd.rm_sta.addr;
if (!skb) {
IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
return 1;
}
res = (struct iwl_rx_packet *)skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
res->hdr.flags);
return 1;
}
switch (res->u.rem_sta.status) {
case REM_STA_SUCCESS_MSK:
iwl_sta_ucode_deactivate(priv, addr);
break;
default:
IWL_ERROR("REPLY_REMOVE_STA failed\n");
break;
}
/* We didn't cache the SKB; let the caller free it */
return 1;
}
static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
u8 flags)
{
struct iwl_rx_packet *res = NULL;
int ret;
struct iwl_rem_sta_cmd rm_sta_cmd;
struct iwl_host_cmd cmd = {
.id = REPLY_REMOVE_STA,
.len = sizeof(struct iwl_rem_sta_cmd),
.meta.flags = flags,
.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);
if (flags & CMD_ASYNC)
cmd.meta.u.callback = iwl_remove_sta_callback;
else
cmd.meta.flags |= CMD_WANT_SKB;
ret = iwl_send_cmd(priv, &cmd);
if (ret || (flags & CMD_ASYNC))
return ret;
res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
res->hdr.flags);
ret = -EIO;
}
if (!ret) {
switch (res->u.rem_sta.status) {
case REM_STA_SUCCESS_MSK:
iwl_sta_ucode_deactivate(priv, addr);
IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
break;
default:
ret = -EIO;
IWL_ERROR("REPLY_REMOVE_STA failed\n");
break;
}
}
priv->alloc_rxb_skb--;
dev_kfree_skb_any(cmd.meta.u.skb);
return ret;
}
/**
* iwl_remove_station - Remove driver's knowledge of station.
*/
int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
int sta_id = IWL_INVALID_STATION;
int i, ret = -EINVAL;
unsigned long flags;
DECLARE_MAC_BUF(mac);
spin_lock_irqsave(&priv->sta_lock, flags);
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;
}
if (unlikely(sta_id == IWL_INVALID_STATION))
goto out;
IWL_DEBUG_ASSOC("Removing STA from driver:%d %s\n",
sta_id, print_mac(mac, addr));
if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
IWL_ERROR("Removing %s but non DRIVER active\n",
print_mac(mac, addr));
goto out;
}
if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
IWL_ERROR("Removing %s but non UCODE active\n",
print_mac(mac, addr));
goto out;
}
priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
priv->num_stations--;
BUG_ON(priv->num_stations < 0);
spin_unlock_irqrestore(&priv->sta_lock, flags);
ret = iwl_send_remove_station(priv, addr, CMD_ASYNC);
return ret;
out:
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
EXPORT_SYMBOL(iwl_remove_station);
static int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
{
int i;
for (i = 0; i < STA_KEY_MAX_NUM; i++)
if (!test_and_set_bit(i, &priv->ucode_key_table))
return i;
return -1;
}
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) +
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 = REPLY_WEPKEY,
.data = wep_cmd,
.meta.flags = CMD_ASYNC,
};
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 (priv->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 = priv->wep_keys[i].key_size;
memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
priv->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 = cmd_size;
if (not_empty || send_if_empty)
return iwl_send_cmd(priv, &cmd);
else
return 0;
}
EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);
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);
if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
IWL_ERROR("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]));
ret = iwl_send_static_wepkey_cmd(priv, 1);
IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
keyconf->keyidx, ret);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
EXPORT_SYMBOL(iwl_remove_default_wep_key);
int iwl_set_default_wep_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf)
{
int ret;
unsigned long flags;
if (keyconf->keylen != WEP_KEY_LEN_128 &&
keyconf->keylen != WEP_KEY_LEN_64) {
IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
return -EINVAL;
}
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
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_ERROR("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("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;
}
EXPORT_SYMBOL(iwl_set_default_wep_key);
static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
int ret;
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (keyconf->keylen == WEP_KEY_LEN_128)
key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
memcpy(priv->stations[sta_id].keyinfo.key,
keyconf->key, keyconf->keylen);
memcpy(&priv->stations[sta_id].sta.key.key[3],
keyconf->key, keyconf->keylen);
if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
== STA_KEY_FLG_NO_ENC)
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (sta_id == priv->hw_params.bcast_sta_id)
key_flags |= STA_KEY_MULTICAST_MSK;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
keyconf->keylen);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
keyconf->keylen);
if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
== STA_KEY_FLG_NO_ENC)
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
priv->stations[sta_id].sta.key.key_flags = key_flags;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
int ret = 0;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].keyinfo.alg = keyconf->alg;
priv->stations[sta_id].keyinfo.keylen = 16;
if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
== STA_KEY_FLG_NO_ENC)
priv->stations[sta_id].sta.key.key_offset =
iwl_get_free_ucode_key_index(priv);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
/* This copy is acutally not needed: we get the key with each TX */
memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
int iwl_remove_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
unsigned long flags;
int ret = 0;
u16 key_flags;
u8 keyidx;
priv->key_mapping_key--;
spin_lock_irqsave(&priv->sta_lock, flags);
key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
IWL_DEBUG_WEP("Remove dynamic key: idx=%d sta=%d\n",
keyconf->keyidx, sta_id);
if (keyconf->keyidx != keyidx) {
/* We need to remove a key with index different that the one
* in the uCode. This means that the key we need to remove has
* been replaced by another one with different index.
* Don't do anything and return ok
*/
spin_unlock_irqrestore(&priv->sta_lock, flags);
return 0;
}
if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
&priv->ucode_key_table))
IWL_ERROR("index %d not used in uCode key table.\n",
priv->stations[sta_id].sta.key.key_offset);
memset(&priv->stations[sta_id].keyinfo, 0,
sizeof(struct iwl_hw_key));
memset(&priv->stations[sta_id].sta.key, 0,
sizeof(struct iwl4965_keyinfo));
priv->stations[sta_id].sta.key.key_flags =
STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
EXPORT_SYMBOL(iwl_remove_dynamic_key);
int iwl_set_dynamic_key(struct iwl_priv *priv,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
int ret;
priv->key_mapping_key++;
keyconf->hw_key_idx = HW_KEY_DYNAMIC;
switch (keyconf->alg) {
case ALG_CCMP:
ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
break;
case ALG_TKIP:
ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
break;
case ALG_WEP:
ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
break;
default:
IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
ret = -EINVAL;
}
IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
keyconf->alg, keyconf->keylen, keyconf->keyidx,
sta_id, ret);
return ret;
}
EXPORT_SYMBOL(iwl_set_dynamic_key);
#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("lq station id 0x%x\n", lq->sta_id);
IWL_DEBUG_RATE("lq dta 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("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
int iwl_send_lq_cmd(struct iwl_priv *priv,
struct iwl_link_quality_cmd *lq, u8 flags)
{
struct iwl_host_cmd cmd = {
.id = REPLY_TX_LINK_QUALITY_CMD,
.len = sizeof(struct iwl_link_quality_cmd),
.meta.flags = flags,
.data = lq,
};
if ((lq->sta_id == 0xFF) &&
(priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
return -EINVAL;
if (lq->sta_id == 0xFF)
lq->sta_id = IWL_AP_ID;
iwl_dump_lq_cmd(priv, lq);
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, int is_ap)
{
int i, r;
struct iwl_link_quality_cmd link_cmd = {
.reserved1 = 0,
};
u16 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;
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;
/* Use Tx antenna B only */
rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/
link_cmd.rs_table[i].rate_n_flags =
iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
r = iwl4965_get_prev_ieee_rate(r);
}
link_cmd.general_params.single_stream_ant_msk = 2;
link_cmd.general_params.dual_stream_ant_msk = 3;
link_cmd.agg_params.agg_dis_start_th = 3;
link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
/* 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);
}
/**
* iwl_rxon_add_station - add station into station table.
*
* there is only one AP station with id= IWL_AP_ID
* NOTE: mutex must be held before calling this fnction
*/
int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
u8 sta_id;
/* Add station to device's station table */
struct ieee80211_conf *conf = &priv->hw->conf;
struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
if ((is_ap) &&
(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
(priv->iw_mode == IEEE80211_IF_TYPE_STA))
sta_id = iwl_add_station_flags(priv, addr, is_ap,
0, cur_ht_config);
else
sta_id = iwl_add_station_flags(priv, addr, is_ap,
0, NULL);
/* 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_get_sta_id - Find station's index within station table
*
* If new IBSS station, create new entry in station table
*/
int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
{
int sta_id;
u16 fc = le16_to_cpu(hdr->frame_control);
DECLARE_MAC_BUF(mac);
/* If this frame is broadcast or management, use broadcast station id */
if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
is_multicast_ether_addr(hdr->addr1))
return priv->hw_params.bcast_sta_id;
switch (priv->iw_mode) {
/* 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 IEEE80211_IF_TYPE_STA:
return IWL_AP_ID;
/* If we are an AP, then find the station, or use BCAST */
case IEEE80211_IF_TYPE_AP:
sta_id = iwl_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
return priv->hw_params.bcast_sta_id;
/* If this frame is going out to an IBSS network, find the station,
* or create a new station table entry */
case IEEE80211_IF_TYPE_IBSS:
sta_id = iwl_find_station(priv, hdr->addr1);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
/* Create new station table entry */
sta_id = iwl_add_station_flags(priv, hdr->addr1,
0, CMD_ASYNC, NULL);
if (sta_id != IWL_INVALID_STATION)
return sta_id;
IWL_DEBUG_DROP("Station %s not in station map. "
"Defaulting to broadcast...\n",
print_mac(mac, hdr->addr1));
iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
return priv->hw_params.bcast_sta_id;
default:
IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
return priv->hw_params.bcast_sta_id;
}
}
EXPORT_SYMBOL(iwl_get_sta_id);
/**
* iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
*/
void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
{
unsigned long flags;
/* Remove "disable" flag, to enable Tx for this TID */
spin_lock_irqsave(&priv->sta_lock, flags);
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;
spin_unlock_irqrestore(&priv->sta_lock, flags);
iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);
