forked from sutajiokousagi/linux
/
main.c
1842 lines (1492 loc) · 42.2 KB
/
main.c
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/*
* Atheros CARL9170 driver
*
* mac80211 interaction code
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
* Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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; see the file COPYING. If not, see
* http://www.gnu.org/licenses/.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* Copyright (c) 2007-2008 Atheros Communications, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/random.h>
#include <net/mac80211.h>
#include <net/cfg80211.h>
#include "hw.h"
#include "carl9170.h"
#include "cmd.h"
static int modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
int modparam_noht;
module_param_named(noht, modparam_noht, int, S_IRUGO);
MODULE_PARM_DESC(noht, "Disable MPDU aggregation.");
#define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
.bitrate = (_bitrate), \
.flags = (_flags), \
.hw_value = (_hw_rate) | (_txpidx) << 4, \
}
struct ieee80211_rate __carl9170_ratetable[] = {
RATE(10, 0, 0, 0),
RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(60, 0xb, 0, 0),
RATE(90, 0xf, 0, 0),
RATE(120, 0xa, 0, 0),
RATE(180, 0xe, 0, 0),
RATE(240, 0x9, 0, 0),
RATE(360, 0xd, 1, 0),
RATE(480, 0x8, 2, 0),
RATE(540, 0xc, 3, 0),
};
#undef RATE
#define carl9170_g_ratetable (__carl9170_ratetable + 0)
#define carl9170_g_ratetable_size 12
#define carl9170_a_ratetable (__carl9170_ratetable + 4)
#define carl9170_a_ratetable_size 8
/*
* NB: The hw_value is used as an index into the carl9170_phy_freq_params
* array in phy.c so that we don't have to do frequency lookups!
*/
#define CHAN(_freq, _idx) { \
.center_freq = (_freq), \
.hw_value = (_idx), \
.max_power = 18, /* XXX */ \
}
static struct ieee80211_channel carl9170_2ghz_chantable[] = {
CHAN(2412, 0),
CHAN(2417, 1),
CHAN(2422, 2),
CHAN(2427, 3),
CHAN(2432, 4),
CHAN(2437, 5),
CHAN(2442, 6),
CHAN(2447, 7),
CHAN(2452, 8),
CHAN(2457, 9),
CHAN(2462, 10),
CHAN(2467, 11),
CHAN(2472, 12),
CHAN(2484, 13),
};
static struct ieee80211_channel carl9170_5ghz_chantable[] = {
CHAN(4920, 14),
CHAN(4940, 15),
CHAN(4960, 16),
CHAN(4980, 17),
CHAN(5040, 18),
CHAN(5060, 19),
CHAN(5080, 20),
CHAN(5180, 21),
CHAN(5200, 22),
CHAN(5220, 23),
CHAN(5240, 24),
CHAN(5260, 25),
CHAN(5280, 26),
CHAN(5300, 27),
CHAN(5320, 28),
CHAN(5500, 29),
CHAN(5520, 30),
CHAN(5540, 31),
CHAN(5560, 32),
CHAN(5580, 33),
CHAN(5600, 34),
CHAN(5620, 35),
CHAN(5640, 36),
CHAN(5660, 37),
CHAN(5680, 38),
CHAN(5700, 39),
CHAN(5745, 40),
CHAN(5765, 41),
CHAN(5785, 42),
CHAN(5805, 43),
CHAN(5825, 44),
CHAN(5170, 45),
CHAN(5190, 46),
CHAN(5210, 47),
CHAN(5230, 48),
};
#undef CHAN
#define CARL9170_HT_CAP \
{ \
.ht_supported = true, \
.cap = IEEE80211_HT_CAP_MAX_AMSDU | \
IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
IEEE80211_HT_CAP_SGI_40 | \
IEEE80211_HT_CAP_DSSSCCK40 | \
IEEE80211_HT_CAP_SM_PS, \
.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \
.ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \
.mcs = { \
.rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \
.rx_highest = cpu_to_le16(300), \
.tx_params = IEEE80211_HT_MCS_TX_DEFINED, \
}, \
}
static struct ieee80211_supported_band carl9170_band_2GHz = {
.channels = carl9170_2ghz_chantable,
.n_channels = ARRAY_SIZE(carl9170_2ghz_chantable),
.bitrates = carl9170_g_ratetable,
.n_bitrates = carl9170_g_ratetable_size,
.ht_cap = CARL9170_HT_CAP,
};
static struct ieee80211_supported_band carl9170_band_5GHz = {
.channels = carl9170_5ghz_chantable,
.n_channels = ARRAY_SIZE(carl9170_5ghz_chantable),
.bitrates = carl9170_a_ratetable,
.n_bitrates = carl9170_a_ratetable_size,
.ht_cap = CARL9170_HT_CAP,
};
static void carl9170_ampdu_gc(struct ar9170 *ar)
{
struct carl9170_sta_tid *tid_info;
LIST_HEAD(tid_gc);
rcu_read_lock();
list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
spin_lock_bh(&ar->tx_ampdu_list_lock);
if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) {
tid_info->state = CARL9170_TID_STATE_KILLED;
list_del_rcu(&tid_info->list);
ar->tx_ampdu_list_len--;
list_add_tail(&tid_info->tmp_list, &tid_gc);
}
spin_unlock_bh(&ar->tx_ampdu_list_lock);
}
rcu_assign_pointer(ar->tx_ampdu_iter, tid_info);
rcu_read_unlock();
synchronize_rcu();
while (!list_empty(&tid_gc)) {
struct sk_buff *skb;
tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid,
tmp_list);
while ((skb = __skb_dequeue(&tid_info->queue)))
carl9170_tx_status(ar, skb, false);
list_del_init(&tid_info->tmp_list);
kfree(tid_info);
}
}
static void carl9170_flush(struct ar9170 *ar, bool drop_queued)
{
if (drop_queued) {
int i;
/*
* We can only drop frames which have not been uploaded
* to the device yet.
*/
for (i = 0; i < ar->hw->queues; i++) {
struct sk_buff *skb;
while ((skb = skb_dequeue(&ar->tx_pending[i]))) {
struct ieee80211_tx_info *info;
info = IEEE80211_SKB_CB(skb);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
atomic_dec(&ar->tx_ampdu_upload);
carl9170_tx_status(ar, skb, false);
}
}
}
/* Wait for all other outstanding frames to timeout. */
if (atomic_read(&ar->tx_total_queued))
WARN_ON(wait_for_completion_timeout(&ar->tx_flush, HZ) == 0);
}
static void carl9170_flush_ba(struct ar9170 *ar)
{
struct sk_buff_head free;
struct carl9170_sta_tid *tid_info;
struct sk_buff *skb;
__skb_queue_head_init(&free);
rcu_read_lock();
spin_lock_bh(&ar->tx_ampdu_list_lock);
list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
if (tid_info->state > CARL9170_TID_STATE_SUSPEND) {
tid_info->state = CARL9170_TID_STATE_SUSPEND;
spin_lock(&tid_info->lock);
while ((skb = __skb_dequeue(&tid_info->queue)))
__skb_queue_tail(&free, skb);
spin_unlock(&tid_info->lock);
}
}
spin_unlock_bh(&ar->tx_ampdu_list_lock);
rcu_read_unlock();
while ((skb = __skb_dequeue(&free)))
carl9170_tx_status(ar, skb, false);
}
static void carl9170_zap_queues(struct ar9170 *ar)
{
struct carl9170_vif_info *cvif;
unsigned int i;
carl9170_ampdu_gc(ar);
carl9170_flush_ba(ar);
carl9170_flush(ar, true);
for (i = 0; i < ar->hw->queues; i++) {
spin_lock_bh(&ar->tx_status[i].lock);
while (!skb_queue_empty(&ar->tx_status[i])) {
struct sk_buff *skb;
skb = skb_peek(&ar->tx_status[i]);
carl9170_tx_get_skb(skb);
spin_unlock_bh(&ar->tx_status[i].lock);
carl9170_tx_drop(ar, skb);
spin_lock_bh(&ar->tx_status[i].lock);
carl9170_tx_put_skb(skb);
}
spin_unlock_bh(&ar->tx_status[i].lock);
}
BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1);
BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT);
BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS);
/* reinitialize queues statistics */
memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
for (i = 0; i < ar->hw->queues; i++)
ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD;
for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++)
ar->mem_bitmap[i] = 0;
rcu_read_lock();
list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
spin_lock_bh(&ar->beacon_lock);
dev_kfree_skb_any(cvif->beacon);
cvif->beacon = NULL;
spin_unlock_bh(&ar->beacon_lock);
}
rcu_read_unlock();
atomic_set(&ar->tx_ampdu_upload, 0);
atomic_set(&ar->tx_ampdu_scheduler, 0);
atomic_set(&ar->tx_total_pending, 0);
atomic_set(&ar->tx_total_queued, 0);
atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
}
#define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
do { \
queue.aifs = ai_fs; \
queue.cw_min = cwmin; \
queue.cw_max = cwmax; \
queue.txop = _txop; \
} while (0)
static int carl9170_op_start(struct ieee80211_hw *hw)
{
struct ar9170 *ar = hw->priv;
int err, i;
mutex_lock(&ar->mutex);
carl9170_zap_queues(ar);
/* reset QoS defaults */
CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47);
CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94);
CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0);
CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0);
CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0);
ar->current_factor = ar->current_density = -1;
/* "The first key is unique." */
ar->usedkeys = 1;
ar->filter_state = 0;
ar->ps.last_action = jiffies;
ar->ps.last_slept = jiffies;
ar->erp_mode = CARL9170_ERP_AUTO;
ar->rx_software_decryption = false;
ar->disable_offload = false;
for (i = 0; i < ar->hw->queues; i++) {
ar->queue_stop_timeout[i] = jiffies;
ar->max_queue_stop_timeout[i] = 0;
}
atomic_set(&ar->mem_allocs, 0);
err = carl9170_usb_open(ar);
if (err)
goto out;
err = carl9170_init_mac(ar);
if (err)
goto out;
err = carl9170_set_qos(ar);
if (err)
goto out;
if (ar->fw.rx_filter) {
err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA |
CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD);
if (err)
goto out;
}
err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
AR9170_DMA_TRIGGER_RXQ);
if (err)
goto out;
/* Clear key-cache */
for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) {
err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
0, NULL, 0);
if (err)
goto out;
err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
1, NULL, 0);
if (err)
goto out;
if (i < AR9170_CAM_MAX_USER) {
err = carl9170_disable_key(ar, i);
if (err)
goto out;
}
}
carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
ieee80211_wake_queues(ar->hw);
err = 0;
out:
mutex_unlock(&ar->mutex);
return err;
}
static void carl9170_cancel_worker(struct ar9170 *ar)
{
cancel_delayed_work_sync(&ar->tx_janitor);
#ifdef CONFIG_CARL9170_LEDS
cancel_delayed_work_sync(&ar->led_work);
#endif /* CONFIG_CARL9170_LEDS */
cancel_work_sync(&ar->ps_work);
cancel_work_sync(&ar->ping_work);
cancel_work_sync(&ar->ampdu_work);
}
static void carl9170_op_stop(struct ieee80211_hw *hw)
{
struct ar9170 *ar = hw->priv;
carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
ieee80211_stop_queues(ar->hw);
mutex_lock(&ar->mutex);
if (IS_ACCEPTING_CMD(ar)) {
rcu_assign_pointer(ar->beacon_iter, NULL);
carl9170_led_set_state(ar, 0);
/* stop DMA */
carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
carl9170_usb_stop(ar);
}
carl9170_zap_queues(ar);
mutex_unlock(&ar->mutex);
carl9170_cancel_worker(ar);
}
static void carl9170_restart_work(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170,
restart_work);
int err;
ar->usedkeys = 0;
ar->filter_state = 0;
carl9170_cancel_worker(ar);
mutex_lock(&ar->mutex);
err = carl9170_usb_restart(ar);
if (net_ratelimit()) {
if (err) {
dev_err(&ar->udev->dev, "Failed to restart device "
" (%d).\n", err);
} else {
dev_info(&ar->udev->dev, "device restarted "
"successfully.\n");
}
}
carl9170_zap_queues(ar);
mutex_unlock(&ar->mutex);
if (!err) {
ar->restart_counter++;
atomic_set(&ar->pending_restarts, 0);
ieee80211_restart_hw(ar->hw);
} else {
/*
* The reset was unsuccessful and the device seems to
* be dead. But there's still one option: a low-level
* usb subsystem reset...
*/
carl9170_usb_reset(ar);
}
}
void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
{
carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
/*
* Sometimes, an error can trigger several different reset events.
* By ignoring these *surplus* reset events, the device won't be
* killed again, right after it has recovered.
*/
if (atomic_inc_return(&ar->pending_restarts) > 1) {
dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
return;
}
ieee80211_stop_queues(ar->hw);
dev_err(&ar->udev->dev, "restart device (%d)\n", r);
if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
!WARN_ON(r >= __CARL9170_RR_LAST))
ar->last_reason = r;
if (!ar->registered)
return;
if (IS_ACCEPTING_CMD(ar) && !ar->needs_full_reset)
ieee80211_queue_work(ar->hw, &ar->restart_work);
else
carl9170_usb_reset(ar);
/*
* At this point, the device instance might have vanished/disabled.
* So, don't put any code which access the ar9170 struct
* without proper protection.
*/
}
static void carl9170_ping_work(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
int err;
if (!IS_STARTED(ar))
return;
mutex_lock(&ar->mutex);
err = carl9170_echo_test(ar, 0xdeadbeef);
if (err)
carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
mutex_unlock(&ar->mutex);
}
static int carl9170_init_interface(struct ar9170 *ar,
struct ieee80211_vif *vif)
{
struct ath_common *common = &ar->common;
int err;
if (!vif) {
WARN_ON_ONCE(IS_STARTED(ar));
return 0;
}
memcpy(common->macaddr, vif->addr, ETH_ALEN);
if (modparam_nohwcrypt ||
((vif->type != NL80211_IFTYPE_STATION) &&
(vif->type != NL80211_IFTYPE_AP))) {
ar->rx_software_decryption = true;
ar->disable_offload = true;
}
err = carl9170_set_operating_mode(ar);
return err;
}
static int carl9170_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
struct ieee80211_vif *main_vif;
struct ar9170 *ar = hw->priv;
int vif_id = -1, err = 0;
mutex_lock(&ar->mutex);
rcu_read_lock();
if (vif_priv->active) {
/*
* Skip the interface structure initialization,
* if the vif survived the _restart call.
*/
vif_id = vif_priv->id;
vif_priv->enable_beacon = false;
spin_lock_bh(&ar->beacon_lock);
dev_kfree_skb_any(vif_priv->beacon);
vif_priv->beacon = NULL;
spin_unlock_bh(&ar->beacon_lock);
goto init;
}
main_vif = carl9170_get_main_vif(ar);
if (main_vif) {
switch (main_vif->type) {
case NL80211_IFTYPE_STATION:
if (vif->type == NL80211_IFTYPE_STATION)
break;
err = -EBUSY;
rcu_read_unlock();
goto unlock;
case NL80211_IFTYPE_AP:
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_WDS) ||
(vif->type == NL80211_IFTYPE_AP))
break;
err = -EBUSY;
rcu_read_unlock();
goto unlock;
default:
rcu_read_unlock();
goto unlock;
}
}
vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
if (vif_id < 0) {
rcu_read_unlock();
err = -ENOSPC;
goto unlock;
}
BUG_ON(ar->vif_priv[vif_id].id != vif_id);
vif_priv->active = true;
vif_priv->id = vif_id;
vif_priv->enable_beacon = false;
ar->vifs++;
list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
init:
if (carl9170_get_main_vif(ar) == vif) {
rcu_assign_pointer(ar->beacon_iter, vif_priv);
rcu_read_unlock();
err = carl9170_init_interface(ar, vif);
if (err)
goto unlock;
} else {
rcu_read_unlock();
err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
if (err)
goto unlock;
}
if (ar->fw.tx_seq_table) {
err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
0);
if (err)
goto unlock;
}
unlock:
if (err && (vif_id >= 0)) {
vif_priv->active = false;
bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
ar->vifs--;
rcu_assign_pointer(ar->vif_priv[vif_id].vif, NULL);
list_del_rcu(&vif_priv->list);
mutex_unlock(&ar->mutex);
synchronize_rcu();
} else {
if (ar->vifs > 1)
ar->ps.off_override |= PS_OFF_VIF;
mutex_unlock(&ar->mutex);
}
return err;
}
static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
struct ieee80211_vif *main_vif;
struct ar9170 *ar = hw->priv;
unsigned int id;
mutex_lock(&ar->mutex);
if (WARN_ON_ONCE(!vif_priv->active))
goto unlock;
ar->vifs--;
rcu_read_lock();
main_vif = carl9170_get_main_vif(ar);
id = vif_priv->id;
vif_priv->active = false;
WARN_ON(vif_priv->enable_beacon);
vif_priv->enable_beacon = false;
list_del_rcu(&vif_priv->list);
rcu_assign_pointer(ar->vif_priv[id].vif, NULL);
if (vif == main_vif) {
rcu_read_unlock();
if (ar->vifs) {
WARN_ON(carl9170_init_interface(ar,
carl9170_get_main_vif(ar)));
} else {
carl9170_set_operating_mode(ar);
}
} else {
rcu_read_unlock();
WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
}
carl9170_update_beacon(ar, false);
carl9170_flush_cab(ar, id);
spin_lock_bh(&ar->beacon_lock);
dev_kfree_skb_any(vif_priv->beacon);
vif_priv->beacon = NULL;
spin_unlock_bh(&ar->beacon_lock);
bitmap_release_region(&ar->vif_bitmap, id, 0);
carl9170_set_beacon_timers(ar);
if (ar->vifs == 1)
ar->ps.off_override &= ~PS_OFF_VIF;
unlock:
mutex_unlock(&ar->mutex);
synchronize_rcu();
}
void carl9170_ps_check(struct ar9170 *ar)
{
ieee80211_queue_work(ar->hw, &ar->ps_work);
}
/* caller must hold ar->mutex */
static int carl9170_ps_update(struct ar9170 *ar)
{
bool ps = false;
int err = 0;
if (!ar->ps.off_override)
ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
if (ps != ar->ps.state) {
err = carl9170_powersave(ar, ps);
if (err)
return err;
if (ar->ps.state && !ps) {
ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
ar->ps.last_action);
}
if (ps)
ar->ps.last_slept = jiffies;
ar->ps.last_action = jiffies;
ar->ps.state = ps;
}
return 0;
}
static void carl9170_ps_work(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170,
ps_work);
mutex_lock(&ar->mutex);
if (IS_STARTED(ar))
WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
mutex_unlock(&ar->mutex);
}
static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct ar9170 *ar = hw->priv;
int err = 0;
mutex_lock(&ar->mutex);
if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
/* TODO */
err = 0;
}
if (changed & IEEE80211_CONF_CHANGE_PS) {
err = carl9170_ps_update(ar);
if (err)
goto out;
}
if (changed & IEEE80211_CONF_CHANGE_POWER) {
/* TODO */
err = 0;
}
if (changed & IEEE80211_CONF_CHANGE_SMPS) {
/* TODO */
err = 0;
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
/* adjust slot time for 5 GHz */
err = carl9170_set_slot_time(ar);
if (err)
goto out;
err = carl9170_set_channel(ar, hw->conf.channel,
hw->conf.channel_type, CARL9170_RFI_NONE);
if (err)
goto out;
err = carl9170_set_dyn_sifs_ack(ar);
if (err)
goto out;
err = carl9170_set_rts_cts_rate(ar);
if (err)
goto out;
}
out:
mutex_unlock(&ar->mutex);
return err;
}
static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
struct netdev_hw_addr_list *mc_list)
{
struct netdev_hw_addr *ha;
u64 mchash;
/* always get broadcast frames */
mchash = 1ULL << (0xff >> 2);
netdev_hw_addr_list_for_each(ha, mc_list)
mchash |= 1ULL << (ha->addr[5] >> 2);
return mchash;
}
static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *new_flags,
u64 multicast)
{
struct ar9170 *ar = hw->priv;
/* mask supported flags */
*new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
if (!IS_ACCEPTING_CMD(ar))
return;
mutex_lock(&ar->mutex);
ar->filter_state = *new_flags;
/*
* We can support more by setting the sniffer bit and
* then checking the error flags, later.
*/
if (*new_flags & FIF_ALLMULTI)
multicast = ~0ULL;
if (multicast != ar->cur_mc_hash)
WARN_ON(carl9170_update_multicast(ar, multicast));
if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
ar->sniffer_enabled = !!(*new_flags &
(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS));
WARN_ON(carl9170_set_operating_mode(ar));
}
if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
u32 rx_filter = 0;
if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
rx_filter |= CARL9170_RX_FILTER_BAD;
if (!(*new_flags & FIF_CONTROL))
rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
if (!(*new_flags & FIF_PSPOLL))
rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
if (!(*new_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))) {
rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
}
WARN_ON(carl9170_rx_filter(ar, rx_filter));
}
mutex_unlock(&ar->mutex);
}
static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
struct ar9170 *ar = hw->priv;
struct ath_common *common = &ar->common;
int err = 0;
struct carl9170_vif_info *vif_priv;
struct ieee80211_vif *main_vif;
mutex_lock(&ar->mutex);
vif_priv = (void *) vif->drv_priv;
main_vif = carl9170_get_main_vif(ar);
if (WARN_ON(!main_vif))
goto out;
if (changed & BSS_CHANGED_BEACON_ENABLED) {
struct carl9170_vif_info *iter;
int i = 0;
vif_priv->enable_beacon = bss_conf->enable_beacon;
rcu_read_lock();
list_for_each_entry_rcu(iter, &ar->vif_list, list) {
if (iter->active && iter->enable_beacon)
i++;
}
rcu_read_unlock();
ar->beacon_enabled = i;
}
if (changed & BSS_CHANGED_BEACON) {
err = carl9170_update_beacon(ar, false);
if (err)
goto out;
}
if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
BSS_CHANGED_BEACON_INT)) {
if (main_vif != vif) {
bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
}
/*
* Therefore a hard limit for the broadcast traffic should
* prevent false alarms.
*/
if (vif->type != NL80211_IFTYPE_STATION &&
(bss_conf->beacon_int * bss_conf->dtim_period >=
(CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
err = -EINVAL;
goto out;
}
err = carl9170_set_beacon_timers(ar);
if (err)
goto out;
}
if (changed & BSS_CHANGED_HT) {
/* TODO */
err = 0;
if (err)
goto out;
}
if (main_vif != vif)
goto out;
/*
* The following settings can only be changed by the
* master interface.
*/