| /* |
| * 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/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 bool modparam_nohwcrypt; |
| module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444); |
| MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload."); |
| |
| int modparam_noht; |
| module_param_named(noht, modparam_noht, int, 0444); |
| 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; |
| |
| /* Set "disable hw crypto offload" whenever the module parameter |
| * nohwcrypt is true or if the firmware does not support it. |
| */ |
| ar->disable_offload = modparam_nohwcrypt | |
| ar->fw.disable_offload_fw; |
| ar->rx_software_decryption = ar->disable_offload; |
| |
| 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_queue_delayed_work(ar->hw, &ar->stat_work, |
| round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); |
| |
| 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->stat_work); |
| 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_INIT_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 = -EIO; |
| |
| ar->usedkeys = 0; |
| ar->filter_state = 0; |
| carl9170_cancel_worker(ar); |
| |
| mutex_lock(&ar->mutex); |
| if (!ar->force_usb_reset) { |
| 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->force_usb_reset) { |
| 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) |
| ar->force_usb_reset = true; |
| |
| ieee80211_queue_work(ar->hw, &ar->restart_work); |
| |
| /* |
| * 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); |
| |
| /* We have to fall back to software crypto, whenever |
| * the user choose to participates in an IBSS. HW |
| * offload for IBSS RSN is not supported by this driver. |
| * |
| * NOTE: If the previous main interface has already |
| * disabled hw crypto offload, we have to keep this |
| * previous disable_offload setting as it was. |
| * Altough ideally, we should notify mac80211 and tell |
| * it to forget about any HW crypto offload for now. |
| */ |
| ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) && |
| (vif->type != NL80211_IFTYPE_AP)); |
| |
| /* The driver used to have P2P GO+CLIENT support, |
| * but since this was dropped and we don't know if |
| * there are any gremlins lurking in the shadows, |
| * so best we keep HW offload disabled for P2P. |
| */ |
| ar->disable_offload |= vif->p2p; |
| |
| ar->rx_software_decryption = ar->disable_offload; |
| |
| 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, *old_main = NULL; |
| 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; |
| } |
| |
| /* Because the AR9170 HW's MAC doesn't provide full support for |
| * multiple, independent interfaces [of different operation modes]. |
| * We have to select ONE main interface [main mode of HW], but we |
| * can have multiple slaves [AKA: entry in the ACK-table]. |
| * |
| * The first (from HEAD/TOP) interface in the ar->vif_list is |
| * always the main intf. All following intfs in this list |
| * are considered to be slave intfs. |
| */ |
| 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_MESH_POINT: |
| case NL80211_IFTYPE_AP: |
| if ((vif->type == NL80211_IFTYPE_STATION) || |
| (vif->type == NL80211_IFTYPE_AP) || |
| (vif->type == NL80211_IFTYPE_MESH_POINT)) |
| 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++; |
| if (old_main) { |
| /* We end up in here, if the main interface is being replaced. |
| * Put the new main interface at the HEAD of the list and the |
| * previous inteface will automatically become second in line. |
| */ |
| list_add_rcu(&vif_priv->list, &ar->vif_list); |
| } else { |
| /* Add new inteface. If the list is empty, it will become the |
| * main inteface, otherwise it will be slave. |
| */ |
| list_add_tail_rcu(&vif_priv->list, &ar->vif_list); |
| } |
| rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif); |
| |
| init: |
| main_vif = carl9170_get_main_vif(ar); |
| |
| if (main_vif == vif) { |
| rcu_assign_pointer(ar->beacon_iter, vif_priv); |
| rcu_read_unlock(); |
| |
| if (old_main) { |
| struct carl9170_vif_info *old_main_priv = |
| (void *) old_main->drv_priv; |
| /* downgrade old main intf to slave intf. |
| * NOTE: We are no longer under rcu_read_lock. |
| * But we are still holding ar->mutex, so the |
| * vif data [id, addr] is safe. |
| */ |
| err = carl9170_mod_virtual_mac(ar, old_main_priv->id, |
| old_main->addr); |
| if (err) |
| goto 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_INIT_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_INIT_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_update_survey(struct ar9170 *ar, bool flush, bool noise) |
| { |
| int err; |
| |
| if (noise) { |
| err = carl9170_get_noisefloor(ar); |
| if (err) |
| return err; |
| } |
| |
| if (ar->fw.hw_counters) { |
| err = carl9170_collect_tally(ar); |
| if (err) |
| return err; |
| } |
| |
| if (flush) |
| memset(&ar->tally, 0, sizeof(ar->tally)); |
| |
| return 0; |
| } |
| |
| static void carl9170_stat_work(struct work_struct *work) |
| { |
| struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work); |
| int err; |
| |
| mutex_lock(&ar->mutex); |
| err = carl9170_update_survey(ar, false, true); |
| mutex_unlock(&ar->mutex); |
| |
| if (err) |
| return; |
| |
| ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, |
| round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); |
| } |
| |
| 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_SMPS) { |
| /* TODO */ |
| err = 0; |
| } |
| |
| if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { |
| enum nl80211_channel_type channel_type = |
| cfg80211_get_chandef_type(&hw->conf.chandef); |
| |
| /* adjust slot time for 5 GHz */ |
| err = carl9170_set_slot_time(ar); |
| if (err) |
| goto out; |
| |
| err = carl9170_update_survey(ar, true, false); |
| if (err) |
| goto out; |
| |
| err = carl9170_set_channel(ar, hw->conf.chandef.chan, |
| channel_type); |
| if (err) |
| goto out; |
| |
| err = carl9170_update_survey(ar, false, true); |
| 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; |
| } |
| |
| if (changed & IEEE80211_CONF_CHANGE_POWER) { |
| err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan); |
| 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) { |
| ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS); |
| |
| WARN_ON(carl9170_set_operating_mode(ar)); |
| } |
| |
| if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) { |
| u32 rx_filter = 0; |
| |
| if (!ar->fw.ba_filter) |
| rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; |
| |
| 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)) { |
| 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. |
| */ |
| |
| if (changed & BSS_CHANGED_BSSID) { |
| memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); |
| err = carl9170_set_operating_mode(ar); |
| if (err) |
| goto out; |
| } |
| |
| if (changed & BSS_CHANGED_ASSOC) { |
| ar->common.curaid = bss_conf->aid; |
| err = carl9170_set_beacon_timers(ar); |
| if (err) |
| goto out; |
| } |
| |
| if (changed & BSS_CHANGED_ERP_SLOT) { |
| err = carl9170_set_slot_time(ar); |
| if (err) |
| goto out; |
| } |
| |
| if (changed & BSS_CHANGED_BASIC_RATES) { |
| err = carl9170_set_mac_rates(ar); |
| if (err) |
| goto out; |
| } |
| |
| out: |
| WARN_ON_ONCE(err && IS_STARTED(ar)); |
| mutex_unlock(&ar->mutex); |
| } |
| |
| static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct ar9170 *ar = hw->priv; |
| struct carl9170_tsf_rsp tsf; |
| int err; |
| |
| mutex_lock(&ar->mutex); |
| err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF, |
| 0, NULL, sizeof(tsf), &tsf); |
| mutex_unlock(&ar->mutex); |
| if (WARN_ON(err)) |
| return 0; |
| |
| return le64_to_cpu(tsf.tsf_64); |
| } |
| |
| static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, |
| struct ieee80211_key_conf *key) |
| { |
| struct ar9170 *ar = hw->priv; |
| int err = 0, i; |
| u8 ktype; |
| |
| if (ar->disable_offload || !vif) |
| return -EOPNOTSUPP; |
| |
| /* Fall back to software encryption whenever the driver is connected |
| * to more than one network. |
| * |
| * This is very unfortunate, because some machines cannot handle |
| * the high througput speed in 802.11n networks. |
| */ |
| |
| if (!is_main_vif(ar, vif)) { |
| mutex_lock(&ar->mutex); |
| goto err_softw; |
| } |
| |
| /* |
| * While the hardware supports *catch-all* key, for offloading |
| * group-key en-/de-cryption. The way of how the hardware |
| * decides which keyId maps to which key, remains a mystery... |
| */ |
| if ((vif->type != NL80211_IFTYPE_STATION && |
| vif->type != NL80211_IFTYPE_ADHOC) && |
| !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) |
| return -EOPNOTSUPP; |
| |
| switch (key->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| ktype = AR9170_ENC_ALG_WEP64; |
| break; |
| case WLAN_CIPHER_SUITE_WEP104: |
| ktype = AR9170_ENC_ALG_WEP128; |
| break; |
| case WLAN_CIPHER_SUITE_TKIP: |
| ktype = AR9170_ENC_ALG_TKIP; |
| break; |
| case WLAN_CIPHER_SUITE_CCMP: |
| ktype = AR9170_ENC_ALG_AESCCMP; |
| key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| mutex_lock(&ar->mutex); |
| if (cmd == SET_KEY) { |
| if (!IS_STARTED(ar)) { |
| err = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { |
| sta = NULL; |
| |
| i = 64 + key->keyidx; |
| } else { |
| for (i = 0; i < 64; i++) |
| if (!(ar->usedkeys & BIT(i))) |
| break; |
| if (i == 64) |
| goto err_softw; |
| } |
| |
| key->hw_key_idx = i; |
| |
| err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL, |
| ktype, 0, key->key, |
| min_t(u8, 16, key->keylen)); |
| if (err) |
| goto out; |
| |
| if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
| err = carl9170_upload_key(ar, i, sta ? sta->addr : |
| NULL, ktype, 1, |
| key->key + 16, 16); |
| if (err) |
| goto out; |
| |
| /* |
| * hardware is not capable generating MMIC |
| * of fragmented frames! |
| */ |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; |
| } |
| |
| if (i < 64) |
| ar->usedkeys |= BIT(i); |
| |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; |
| } else { |
| if (!IS_STARTED(ar)) { |
| /* The device is gone... together with the key ;-) */ |
| err = 0; |
| goto out; |
| } |
| |
| if (key->hw_key_idx < 64) { |
| ar->usedkeys &= ~BIT(key->hw_key_idx); |
| } else { |
| err = carl9170_upload_key(ar, key->hw_key_idx, NULL, |
| AR9170_ENC_ALG_NONE, 0, |
| NULL, 0); |
| if (err) |
| goto out; |
| |
| if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
| err = carl9170_upload_key(ar, key->hw_key_idx, |
| NULL, |
| AR9170_ENC_ALG_NONE, |
| 1, NULL, 0); |
| if (err) |
| goto out; |
| } |
| |
| } |
| |
| err = carl9170_disable_key(ar, key->hw_key_idx); |
| if (err) |
| goto out; |
| } |
| |
| out: |
| mutex_unlock(&ar->mutex); |
| return err; |
| |
| err_softw: |
| if (!ar->rx_software_decryption) { |
| ar->rx_software_decryption = true; |
| carl9170_set_operating_mode(ar); |
| } |
| mutex_unlock(&ar->mutex); |
| return -ENOSPC; |
| } |
| |
| static int carl9170_op_sta_add(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta) |
| { |
| struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
| unsigned int i; |
| |
| atomic_set(&sta_info->pending_frames, 0); |
| |
| if (sta->ht_cap.ht_supported) { |
| if (sta->ht_cap.ampdu_density > 6) { |
| /* |
| * HW does support 16us AMPDU density. |
| * No HT-Xmit for station. |
| */ |
| |
| return 0; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) |
| RCU_INIT_POINTER(sta_info->agg[i], NULL); |
| |
| sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); |
| sta_info->ht_sta = true; |
| } |
| |
| return 0; |
| } |
| |
| static int carl9170_op_sta_remove(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta) |
| { |
| struct ar9170 *ar = hw->priv; |
| struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
| unsigned int i; |
| bool cleanup = false; |
| |
| if (sta->ht_cap.ht_supported) { |
| |
| sta_info->ht_sta = false; |
| |
| rcu_read_lock(); |
| for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) { |
| struct carl9170_sta_tid *tid_info; |
| |
| tid_info = rcu_dereference(sta_info->agg[i]); |
| RCU_INIT_POINTER(sta_info->agg[i], NULL); |
| |
| if (!tid_info) |
| continue; |
| |
| spin_lock_bh(&ar->tx_ampdu_list_lock); |
| if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) |
| tid_info->state = CARL9170_TID_STATE_SHUTDOWN; |
| spin_unlock_bh(&ar->tx_ampdu_list_lock); |
| cleanup = true; |
| } |
| rcu_read_unlock(); |
| |
| if (cleanup) |
| carl9170_ampdu_gc(ar); |
| } |
| |
| return 0; |
| } |
| |
| static int carl9170_op_conf_tx(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, u16 queue, |
| const struct ieee80211_tx_queue_params *param) |
| { |
| struct ar9170 *ar = hw->priv; |
| int ret; |
| |
| mutex_lock(&ar->mutex); |
| memcpy(&ar->edcf[ar9170_qmap(queue)], param, sizeof(*param)); |
| ret = carl9170_set_qos(ar); |
| mutex_unlock(&ar->mutex); |
| return ret; |
| } |
| |
| static void carl9170_ampdu_work(struct work_struct *work) |
| { |
| struct ar9170 *ar = container_of(work, struct ar9170, |
| ampdu_work); |
| |
| if (!IS_STARTED(ar)) |
| return; |
| |
| mutex_lock(&ar->mutex); |
| carl9170_ampdu_gc(ar); |
| mutex_unlock(&ar->mutex); |
| } |
| |
| static int carl9170_op_ampdu_action(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_ampdu_params *params) |
| { |
| struct ieee80211_sta *sta = params->sta; |
| enum ieee80211_ampdu_mlme_action action = params->action; |
| u16 tid = params->tid; |
| u16 *ssn = ¶ms->ssn; |
| struct ar9170 *ar = hw->priv; |
| struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
| struct carl9170_sta_tid *tid_info; |
| |
| if (modparam_noht) |
| return -EOPNOTSUPP; |
| |
| switch (action) { |
| case IEEE80211_AMPDU_TX_START: |
| if (!sta_info->ht_sta) |
| return -EOPNOTSUPP; |
| |
| tid_info = kzalloc(sizeof(struct carl9170_sta_tid), |
| GFP_ATOMIC); |
| if (!tid_info) |
| return -ENOMEM; |
| |
| tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn); |
| tid_info->state = CARL9170_TID_STATE_PROGRESS; |
| tid_info->tid = tid; |
| tid_info->max = sta_info->ampdu_max_len; |
| tid_info->sta = sta; |
| tid_info->vif = vif; |
| |
| INIT_LIST_HEAD(&tid_info->list); |
| INIT_LIST_HEAD(&tid_info->tmp_list); |
| skb_queue_head_init(&tid_info->queue); |
| spin_lock_init(&tid_info->lock); |
| |
| spin_lock_bh(&ar->tx_ampdu_list_lock); |
| ar->tx_ampdu_list_len++; |
| list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list); |
| rcu_assign_pointer(sta_info->agg[tid], tid_info); |
| spin_unlock_bh(&ar->tx_ampdu_list_lock); |
| |
| return IEEE80211_AMPDU_TX_START_IMMEDIATE; |
| |
| case IEEE80211_AMPDU_TX_STOP_CONT: |
| case IEEE80211_AMPDU_TX_STOP_FLUSH: |
| case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: |
| rcu_read_lock(); |
| tid_info = rcu_dereference(sta_info->agg[tid]); |
| if (tid_info) { |
| spin_lock_bh(&ar->tx_ampdu_list_lock); |
| if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) |
| tid_info->state = CARL9170_TID_STATE_SHUTDOWN; |
| spin_unlock_bh(&ar->tx_ampdu_list_lock); |
| } |
| |
| RCU_INIT_POINTER(sta_info->agg[tid], NULL); |
| rcu_read_unlock(); |
| |
| ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
| ieee80211_queue_work(ar->hw, &ar->ampdu_work); |
| break; |
| |
| case IEEE80211_AMPDU_TX_OPERATIONAL: |
| rcu_read_lock(); |
| tid_info = rcu_dereference(sta_info->agg[tid]); |
| |
| sta_info->stats[tid].clear = true; |
| sta_info->stats[tid].req = false; |
| |
| if (tid_info) { |
| bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE); |
| tid_info->state = CARL9170_TID_STATE_IDLE; |
| } |
| rcu_read_unlock(); |
| |
| if (WARN_ON_ONCE(!tid_info)) |
| return -EFAULT; |
| |
| break; |
| |
| case IEEE80211_AMPDU_RX_START: |
| case IEEE80211_AMPDU_RX_STOP: |
| /* Handled by hardware */ |
| break; |
| |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_CARL9170_WPC |
| static int carl9170_register_wps_button(struct ar9170 *ar) |
| { |
| struct input_dev *input; |
| int err; |
| |
| if (!(ar->features & CARL9170_WPS_BUTTON)) |
| return 0; |
| |
| input = input_allocate_device(); |
| if (!input) |
| return -ENOMEM; |
| |
| snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button", |
| wiphy_name(ar->hw->wiphy)); |
| |
| snprintf(ar->wps.phys, sizeof(ar->wps.phys), |
| "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy)); |
| |
| input->name = ar->wps.name; |
| input->phys = ar->wps.phys; |
| input->id.bustype = BUS_USB; |
| input->dev.parent = &ar->hw->wiphy->dev; |
| |
| input_set_capability(input, EV_KEY, KEY_WPS_BUTTON); |
| |
| err = input_register_device(input); |
| if (err) { |
| input_free_device(input); |
| return err; |
| } |
| |
| ar->wps.pbc = input; |
| return 0; |
| } |
| #endif /* CONFIG_CARL9170_WPC */ |
| |
| #ifdef CONFIG_CARL9170_HWRNG |
| static int carl9170_rng_get(struct ar9170 *ar) |
| { |
| |
| #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32)) |
| #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN) |
| |
| static const __le32 rng_load[RW] = { |
| [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)}; |
| |
| u32 buf[RW]; |
| |
| unsigned int i, off = 0, transfer, count; |
| int err; |
| |
| BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN); |
| |
| if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized) |
| return -EAGAIN; |
| |
| count = ARRAY_SIZE(ar->rng.cache); |
| while (count) { |
| err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, |
| RB, (u8 *) rng_load, |
| RB, (u8 *) buf); |
| if (err) |
| return err; |
| |
| transfer = min_t(unsigned int, count, RW); |
| for (i = 0; i < transfer; i++) |
| ar->rng.cache[off + i] = buf[i]; |
| |
| off += transfer; |
| count -= transfer; |
| } |
| |
| ar->rng.cache_idx = 0; |
| |
| #undef RW |
| #undef RB |
| return 0; |
| } |
| |
| static int carl9170_rng_read(struct hwrng *rng, u32 *data) |
| { |
| struct ar9170 *ar = (struct ar9170 *)rng->priv; |
| int ret = -EIO; |
| |
| mutex_lock(&ar->mutex); |
| if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) { |
| ret = carl9170_rng_get(ar); |
| if (ret) { |
| mutex_unlock(&ar->mutex); |
| return ret; |
| } |
| } |
| |
| *data = ar->rng.cache[ar->rng.cache_idx++]; |
| mutex_unlock(&ar->mutex); |
| |
| return sizeof(u16); |
| } |
| |
| static void carl9170_unregister_hwrng(struct ar9170 *ar) |
| { |
| if (ar->rng.initialized) { |
| hwrng_unregister(&ar->rng.rng); |
| ar->rng.initialized = false; |
| } |
| } |
| |
| static int carl9170_register_hwrng(struct ar9170 *ar) |
| { |
| int err; |
| |
| snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name), |
| "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy)); |
| ar->rng.rng.name = ar->rng.name; |
| ar->rng.rng.data_read = carl9170_rng_read; |
| ar->rng.rng.priv = (unsigned long)ar; |
| |
| if (WARN_ON(ar->rng.initialized)) |
| return -EALREADY; |
| |
| err = hwrng_register(&ar->rng.rng); |
| if (err) { |
| dev_err(&ar->udev->dev, "Failed to register the random " |
| "number generator (%d)\n", err); |
| return err; |
| } |
| |
| ar->rng.initialized = true; |
| |
| err = carl9170_rng_get(ar); |
| if (err) { |
| carl9170_unregister_hwrng(ar); |
| return err; |
| } |
| |
| return 0; |
| } |
| #endif /* CONFIG_CARL9170_HWRNG */ |
| |
| static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, |
| struct survey_info *survey) |
| { |
| struct ar9170 *ar = hw->priv; |
| struct ieee80211_channel *chan; |
| struct ieee80211_supported_band *band; |
| int err, b, i; |
| |
| chan = ar->channel; |
| if (!chan) |
| return -ENODEV; |
| |
| if (idx == chan->hw_value) { |
| mutex_lock(&ar->mutex); |
| err = carl9170_update_survey(ar, false, true); |
| mutex_unlock(&ar->mutex); |
| if (err) |
| return err; |
| } |
| |
| for (b = 0; b < NUM_NL80211_BANDS; b++) { |
| band = ar->hw->wiphy->bands[b]; |
| |
| if (!band) |
| continue; |
| |
| for (i = 0; i < band->n_channels; i++) { |
| if (band->channels[i].hw_value == idx) { |
| chan = &band->channels[i]; |
| goto found; |
| } |
| } |
| } |
| return -ENOENT; |
| |
| found: |
| memcpy(survey, &ar->survey[idx], sizeof(*survey)); |
| |
| survey->channel = chan; |
| survey->filled = SURVEY_INFO_NOISE_DBM; |
| |
| if (ar->channel == chan) |
| survey->filled |= SURVEY_INFO_IN_USE; |
| |
| if (ar->fw.hw_counters) { |
| survey->filled |= SURVEY_INFO_TIME | |
| SURVEY_INFO_TIME_BUSY | |
| SURVEY_INFO_TIME_TX; |
| } |
| |
| return 0; |
| } |
| |
| static void carl9170_op_flush(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| u32 queues, bool drop) |
| { |
| struct ar9170 *ar = hw->priv; |
| unsigned int vid; |
| |
| mutex_lock(&ar->mutex); |
| for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num) |
| carl9170_flush_cab(ar, vid); |
| |
| carl9170_flush(ar, drop); |
| mutex_unlock(&ar->mutex); |
| } |
| |
| static int carl9170_op_get_stats(struct ieee80211_hw *hw, |
| struct ieee80211_low_level_stats *stats) |
| { |
| struct ar9170 *ar = hw->priv; |
| |
| memset(stats, 0, sizeof(*stats)); |
| stats->dot11ACKFailureCount = ar->tx_ack_failures; |
| stats->dot11FCSErrorCount = ar->tx_fcs_errors; |
| return 0; |
| } |
| |
| static void carl9170_op_sta_notify(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum sta_notify_cmd cmd, |
| struct ieee80211_sta *sta) |
| { |
| struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
| |
| switch (cmd) { |
| case STA_NOTIFY_SLEEP: |
| sta_info->sleeping = true; |
| if (atomic_read(&sta_info->pending_frames)) |
| ieee80211_sta_block_awake(hw, sta, true); |
| break; |
| |
| case STA_NOTIFY_AWAKE: |
| sta_info->sleeping = false; |
| break; |
| } |
| } |
| |
| static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw) |
| { |
| struct ar9170 *ar = hw->priv; |
| |
| return !!atomic_read(&ar->tx_total_queued); |
| } |
| |
| static const struct ieee80211_ops carl9170_ops = { |
| .start = carl9170_op_start, |
| .stop = carl9170_op_stop, |
| .tx = carl9170_op_tx, |
| .flush = carl9170_op_flush, |
| .add_interface = carl9170_op_add_interface, |
| .remove_interface = carl9170_op_remove_interface, |
| .config = carl9170_op_config, |
| .prepare_multicast = carl9170_op_prepare_multicast, |
| .configure_filter = carl9170_op_configure_filter, |
| .conf_tx = carl9170_op_conf_tx, |
| .bss_info_changed = carl9170_op_bss_info_changed, |
| .get_tsf = carl9170_op_get_tsf, |
| .set_key = carl9170_op_set_key, |
| .sta_add = carl9170_op_sta_add, |
| .sta_remove = carl9170_op_sta_remove, |
| .sta_notify = carl9170_op_sta_notify, |
| .get_survey = carl9170_op_get_survey, |
| .get_stats = carl9170_op_get_stats, |
| .ampdu_action = carl9170_op_ampdu_action, |
| .tx_frames_pending = carl9170_tx_frames_pending, |
| }; |
| |
| void *carl9170_alloc(size_t priv_size) |
| { |
| struct ieee80211_hw *hw; |
| struct ar9170 *ar; |
| struct sk_buff *skb; |
| int i; |
| |
| /* |
| * this buffer is used for rx stream reconstruction. |
| * Under heavy load this device (or the transport layer?) |
| * tends to split the streams into separate rx descriptors. |
| */ |
| |
| skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); |
| if (!skb) |
| goto err_nomem; |
| |
| hw = ieee80211_alloc_hw(priv_size, &carl9170_ops); |
| if (!hw) |
| goto err_nomem; |
| |
| ar = hw->priv; |
| ar->hw = hw; |
| ar->rx_failover = skb; |
| |
| memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head)); |
| ar->rx_has_plcp = false; |
| |
| /* |
| * Here's a hidden pitfall! |
| * |
| * All 4 AC queues work perfectly well under _legacy_ operation. |
| * However as soon as aggregation is enabled, the traffic flow |
| * gets very bumpy. Therefore we have to _switch_ to a |
| * software AC with a single HW queue. |
| */ |
| hw->queues = __AR9170_NUM_TXQ; |
| |
| mutex_init(&ar->mutex); |
| spin_lock_init(&ar->beacon_lock); |
| spin_lock_init(&ar->cmd_lock); |
| spin_lock_init(&ar->tx_stats_lock); |
| spin_lock_init(&ar->tx_ampdu_list_lock); |
| spin_lock_init(&ar->mem_lock); |
| spin_lock_init(&ar->state_lock); |
| atomic_set(&ar->pending_restarts, 0); |
| ar->vifs = 0; |
| for (i = 0; i < ar->hw->queues; i++) { |
| skb_queue_head_init(&ar->tx_status[i]); |
| skb_queue_head_init(&ar->tx_pending[i]); |
| |
| INIT_LIST_HEAD(&ar->bar_list[i]); |
| spin_lock_init(&ar->bar_list_lock[i]); |
| } |
| INIT_WORK(&ar->ps_work, carl9170_ps_work); |
| INIT_WORK(&ar->ping_work, carl9170_ping_work); |
| INIT_WORK(&ar->restart_work, carl9170_restart_work); |
| INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work); |
| INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work); |
| INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor); |
| INIT_LIST_HEAD(&ar->tx_ampdu_list); |
| rcu_assign_pointer(ar->tx_ampdu_iter, |
| (struct carl9170_sta_tid *) &ar->tx_ampdu_list); |
| |
| bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num); |
| INIT_LIST_HEAD(&ar->vif_list); |
| init_completion(&ar->tx_flush); |
| |
| /* firmware decides which modes we support */ |
| hw->wiphy->interface_modes = 0; |
| |
| ieee80211_hw_set(hw, RX_INCLUDES_FCS); |
| ieee80211_hw_set(hw, MFP_CAPABLE); |
| ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); |
| ieee80211_hw_set(hw, SUPPORTS_PS); |
| ieee80211_hw_set(hw, PS_NULLFUNC_STACK); |
| ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); |
| ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); |
| ieee80211_hw_set(hw, SIGNAL_DBM); |
| ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES); |
| |
| if (!modparam_noht) { |
| /* |
| * see the comment above, why we allow the user |
| * to disable HT by a module parameter. |
| */ |
| ieee80211_hw_set(hw, AMPDU_AGGREGATION); |
| } |
| |
| hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe); |
| hw->sta_data_size = sizeof(struct carl9170_sta_info); |
| hw->vif_data_size = sizeof(struct carl9170_vif_info); |
| |
| hw->max_rates = CARL9170_TX_MAX_RATES; |
| hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES; |
| |
| for (i = 0; i < ARRAY_SIZE(ar->noise); i++) |
| ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ |
| |
| wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); |
| |
| return ar; |
| |
| err_nomem: |
| kfree_skb(skb); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| static int carl9170_read_eeprom(struct ar9170 *ar) |
| { |
| #define RW 8 /* number of words to read at once */ |
| #define RB (sizeof(u32) * RW) |
| u8 *eeprom = (void *)&ar->eeprom; |
| __le32 offsets[RW]; |
| int i, j, err; |
| |
| BUILD_BUG_ON(sizeof(ar->eeprom) & 3); |
| |
| BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4); |
| #ifndef __CHECKER__ |
| /* don't want to handle trailing remains */ |
| BUILD_BUG_ON(sizeof(ar->eeprom) % RB); |
| #endif |
| |
| for (i = 0; i < sizeof(ar->eeprom) / RB; i++) { |
| for (j = 0; j < RW; j++) |
| offsets[j] = cpu_to_le32(AR9170_EEPROM_START + |
| RB * i + 4 * j); |
| |
| err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, |
| RB, (u8 *) &offsets, |
| RB, eeprom + RB * i); |
| if (err) |
| return err; |
| } |
| |
| #undef RW |
| #undef RB |
| return 0; |
| } |
| |
| static int carl9170_parse_eeprom(struct ar9170 *ar) |
| { |
| struct ath_regulatory *regulatory = &ar->common.regulatory; |
| unsigned int rx_streams, tx_streams, tx_params = 0; |
| int bands = 0; |
| int chans = 0; |
| |
| if (ar->eeprom.length == cpu_to_le16(0xffff)) |
| return -ENODATA; |
| |
| rx_streams = hweight8(ar->eeprom.rx_mask); |
| tx_streams = hweight8(ar->eeprom.tx_mask); |
| |
| if (rx_streams != tx_streams) { |
| tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; |
| |
| WARN_ON(!(tx_streams >= 1 && tx_streams <= |
| IEEE80211_HT_MCS_TX_MAX_STREAMS)); |
| |
| tx_params = (tx_streams - 1) << |
| IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; |
| |
| carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; |
| carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; |
| } |
| |
| if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { |
| ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = |
| &carl9170_band_2GHz; |
| chans += carl9170_band_2GHz.n_channels; |
| bands++; |
| } |
| if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { |
| ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = |
| &carl9170_band_5GHz; |
| chans += carl9170_band_5GHz.n_channels; |
| bands++; |
| } |
| |
| if (!bands) |
| return -EINVAL; |
| |
| ar->survey = kcalloc(chans, sizeof(struct survey_info), GFP_KERNEL); |
| if (!ar->survey) |
| return -ENOMEM; |
| ar->num_channels = chans; |
| |
| regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
| |
| /* second part of wiphy init */ |
| SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address); |
| |
| return 0; |
| } |
| |
| static void carl9170_reg_notifier(struct wiphy *wiphy, |
| struct regulatory_request *request) |
| { |
| struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); |
| struct ar9170 *ar = hw->priv; |
| |
| ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); |
| } |
| |
| int carl9170_register(struct ar9170 *ar) |
| { |
| struct ath_regulatory *regulatory = &ar->common.regulatory; |
| int err = 0, i; |
| |
| if (WARN_ON(ar->mem_bitmap)) |
| return -EINVAL; |
| |
| ar->mem_bitmap = kcalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG), |
| sizeof(unsigned long), |
| GFP_KERNEL); |
| |
| if (!ar->mem_bitmap) |
| return -ENOMEM; |
| |
| /* try to read EEPROM, init MAC addr */ |
| err = carl9170_read_eeprom(ar); |
| if (err) |
| return err; |
| |
| err = carl9170_parse_eeprom(ar); |
| if (err) |
| return err; |
| |
| err = ath_regd_init(regulatory, ar->hw->wiphy, |
| carl9170_reg_notifier); |
| if (err) |
| return err; |
| |
| if (modparam_noht) { |
| carl9170_band_2GHz.ht_cap.ht_supported = false; |
| carl9170_band_5GHz.ht_cap.ht_supported = false; |
| } |
| |
| for (i = 0; i < ar->fw.vif_num; i++) { |
| ar->vif_priv[i].id = i; |
| ar->vif_priv[i].vif = NULL; |
| } |
| |
| err = ieee80211_register_hw(ar->hw); |
| if (err) |
| return err; |
| |
| /* mac80211 interface is now registered */ |
| ar->registered = true; |
| |
| if (!ath_is_world_regd(regulatory)) |
| regulatory_hint(ar->hw->wiphy, regulatory->alpha2); |
| |
| #ifdef CONFIG_CARL9170_DEBUGFS |
| carl9170_debugfs_register(ar); |
| #endif /* CONFIG_CARL9170_DEBUGFS */ |
| |
| err = carl9170_led_init(ar); |
| if (err) |
| goto err_unreg; |
| |
| #ifdef CONFIG_CARL9170_LEDS |
| err = carl9170_led_register(ar); |
| if (err) |
| goto err_unreg; |
| #endif /* CONFIG_CARL9170_LEDS */ |
| |
| #ifdef CONFIG_CARL9170_WPC |
| err = carl9170_register_wps_button(ar); |
| if (err) |
| goto err_unreg; |
| #endif /* CONFIG_CARL9170_WPC */ |
| |
| #ifdef CONFIG_CARL9170_HWRNG |
| err = carl9170_register_hwrng(ar); |
| if (err) |
| goto err_unreg; |
| #endif /* CONFIG_CARL9170_HWRNG */ |
| |
| dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n", |
| wiphy_name(ar->hw->wiphy)); |
| |
| return 0; |
| |
| err_unreg: |
| carl9170_unregister(ar); |
| return err; |
| } |
| |
| void carl9170_unregister(struct ar9170 *ar) |
| { |
| if (!ar->registered) |
| return; |
| |
| ar->registered = false; |
| |
| #ifdef CONFIG_CARL9170_LEDS |
| carl9170_led_unregister(ar); |
| #endif /* CONFIG_CARL9170_LEDS */ |
| |
| #ifdef CONFIG_CARL9170_DEBUGFS |
| carl9170_debugfs_unregister(ar); |
| #endif /* CONFIG_CARL9170_DEBUGFS */ |
| |
| #ifdef CONFIG_CARL9170_WPC |
| if (ar->wps.pbc) { |
| input_unregister_device(ar->wps.pbc); |
| ar->wps.pbc = NULL; |
| } |
| #endif /* CONFIG_CARL9170_WPC */ |
| |
| #ifdef CONFIG_CARL9170_HWRNG |
| carl9170_unregister_hwrng(ar); |
| #endif /* CONFIG_CARL9170_HWRNG */ |
| |
| carl9170_cancel_worker(ar); |
| cancel_work_sync(&ar->restart_work); |
| |
| ieee80211_unregister_hw(ar->hw); |
| } |
| |
| void carl9170_free(struct ar9170 *ar) |
| { |
| WARN_ON(ar->registered); |
| WARN_ON(IS_INITIALIZED(ar)); |
| |
| kfree_skb(ar->rx_failover); |
| ar->rx_failover = NULL; |
| |
| kfree(ar->mem_bitmap); |
| ar->mem_bitmap = NULL; |
| |
| kfree(ar->survey); |
| ar->survey = NULL; |
| |
| mutex_destroy(&ar->mutex); |
| |
| ieee80211_free_hw(ar->hw); |
| } |