--- /dev/null
+/*
+ * Atheros CARL9170 driver
+ *
+ * Driver specific definitions
+ *
+ * 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.
+ */
+#ifndef __CARL9170_H
+#define __CARL9170_H
+
+#include <linux/kernel.h>
+#include <linux/firmware.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <net/cfg80211.h>
+#include <net/mac80211.h>
+#include <linux/usb.h>
+#ifdef CONFIG_CARL9170_LEDS
+#include <linux/leds.h>
+#endif /* CONFIG_CARL170_LEDS */
+#ifdef CONFIG_CARL9170_WPC
+#include <linux/input.h>
+#endif /* CONFIG_CARL9170_WPC */
+#include "eeprom.h"
+#include "wlan.h"
+#include "hw.h"
+#include "fwdesc.h"
+#include "fwcmd.h"
+#include "../regd.h"
+
+#ifdef CONFIG_CARL9170_DEBUGFS
+#include "debug.h"
+#endif /* CONFIG_CARL9170_DEBUGFS */
+
+#define CARL9170FW_NAME "carl9170-1.fw"
+
+#define PAYLOAD_MAX (CARL9170_MAX_CMD_LEN / 4 - 1)
+
+enum carl9170_rf_init_mode {
+ CARL9170_RFI_NONE,
+ CARL9170_RFI_WARM,
+ CARL9170_RFI_COLD,
+};
+
+#define CARL9170_MAX_RX_BUFFER_SIZE 8192
+
+enum carl9170_device_state {
+ CARL9170_UNKNOWN_STATE,
+ CARL9170_STOPPED,
+ CARL9170_IDLE,
+ CARL9170_STARTED,
+};
+
+#define CARL9170_NUM_TID 16
+#define WME_BA_BMP_SIZE 64
+#define CARL9170_TX_USER_RATE_TRIES 3
+
+#define WME_AC_BE 2
+#define WME_AC_BK 3
+#define WME_AC_VI 1
+#define WME_AC_VO 0
+
+#define TID_TO_WME_AC(_tid) \
+ ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
+ (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
+ (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
+ WME_AC_VO)
+
+#define SEQ_DIFF(_start, _seq) \
+ (((_start) - (_seq)) & 0x0fff)
+#define SEQ_PREV(_seq) \
+ (((_seq) - 1) & 0x0fff)
+#define SEQ_NEXT(_seq) \
+ (((_seq) + 1) & 0x0fff)
+#define BAW_WITHIN(_start, _bawsz, _seqno) \
+ ((((_seqno) - (_start)) & 0xfff) < (_bawsz))
+
+enum carl9170_tid_state {
+ CARL9170_TID_STATE_INVALID,
+ CARL9170_TID_STATE_KILLED,
+ CARL9170_TID_STATE_SHUTDOWN,
+ CARL9170_TID_STATE_SUSPEND,
+ CARL9170_TID_STATE_PROGRESS,
+ CARL9170_TID_STATE_IDLE,
+ CARL9170_TID_STATE_XMIT,
+};
+
+#define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE)
+#define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS))
+#define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE))
+
+struct carl9170_sta_tid {
+ /* must be the first entry! */
+ struct list_head list;
+
+ /* temporary list for RCU unlink procedure */
+ struct list_head tmp_list;
+
+ /* lock for the following data structures */
+ spinlock_t lock;
+
+ unsigned int counter;
+ enum carl9170_tid_state state;
+ u8 tid; /* TID number ( 0 - 15 ) */
+ u16 max; /* max. AMPDU size */
+
+ u16 snx; /* awaiting _next_ frame */
+ u16 hsn; /* highest _queued_ sequence */
+ u16 bsn; /* base of the tx/agg bitmap */
+ unsigned long bitmap[CARL9170_BAW_SIZE];
+
+ /* Preaggregation reorder queue */
+ struct sk_buff_head queue;
+};
+
+#define CARL9170_QUEUE_TIMEOUT 256
+#define CARL9170_BUMP_QUEUE 1000
+#define CARL9170_TX_TIMEOUT 2500
+#define CARL9170_JANITOR_DELAY 128
+#define CARL9170_QUEUE_STUCK_TIMEOUT 5500
+
+#define CARL9170_NUM_TX_AGG_MAX 30
+
+/*
+ * Tradeoff between stability/latency and speed.
+ *
+ * AR9170_TXQ_DEPTH is devised by dividing the amount of available
+ * tx buffers with the size of a full ethernet frame + overhead.
+ *
+ * Naturally: The higher the limit, the faster the device CAN send.
+ * However, even a slight over-commitment at the wrong time and the
+ * hardware is doomed to send all already-queued frames at suboptimal
+ * rates. This in turn leads to an enourmous amount of unsuccessful
+ * retries => Latency goes up, whereas the throughput goes down. CRASH!
+ */
+#define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2)
+#define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH)
+
+struct carl9170_tx_queue_stats {
+ unsigned int count;
+ unsigned int limit;
+ unsigned int len;
+};
+
+struct carl9170_vif {
+ unsigned int id;
+ struct ieee80211_vif *vif;
+};
+
+struct carl9170_vif_info {
+ struct list_head list;
+ bool active;
+ unsigned int id;
+ struct sk_buff *beacon;
+ bool enable_beacon;
+};
+
+#define AR9170_NUM_RX_URBS 16
+#define AR9170_NUM_RX_URBS_MUL 2
+#define AR9170_NUM_TX_URBS 8
+#define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS)
+
+enum carl9170_device_features {
+ CARL9170_WPS_BUTTON = BIT(0),
+ CARL9170_ONE_LED = BIT(1),
+};
+
+#ifdef CONFIG_CARL9170_LEDS
+struct ar9170;
+
+struct carl9170_led {
+ struct ar9170 *ar;
+ struct led_classdev l;
+ char name[32];
+ unsigned int toggled;
+ bool last_state;
+ bool registered;
+};
+#endif /* CONFIG_CARL9170_LEDS */
+
+enum carl9170_restart_reasons {
+ CARL9170_RR_NO_REASON = 0,
+ CARL9170_RR_FATAL_FIRMWARE_ERROR,
+ CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS,
+ CARL9170_RR_WATCHDOG,
+ CARL9170_RR_STUCK_TX,
+ CARL9170_RR_SLOW_SYSTEM,
+ CARL9170_RR_COMMAND_TIMEOUT,
+ CARL9170_RR_TOO_MANY_PHY_ERRORS,
+ CARL9170_RR_LOST_RSP,
+ CARL9170_RR_INVALID_RSP,
+ CARL9170_RR_USER_REQUEST,
+
+ __CARL9170_RR_LAST,
+};
+
+enum carl9170_erp_modes {
+ CARL9170_ERP_INVALID,
+ CARL9170_ERP_AUTO,
+ CARL9170_ERP_MAC80211,
+ CARL9170_ERP_OFF,
+ CARL9170_ERP_CTS,
+ CARL9170_ERP_RTS,
+ __CARL9170_ERP_NUM,
+};
+
+struct ar9170 {
+ struct ath_common common;
+ struct ieee80211_hw *hw;
+ struct mutex mutex;
+ enum carl9170_device_state state;
+ spinlock_t state_lock;
+ enum carl9170_restart_reasons last_reason;
+ bool registered;
+
+ /* USB */
+ struct usb_device *udev;
+ struct usb_interface *intf;
+ struct usb_anchor rx_anch;
+ struct usb_anchor rx_work;
+ struct usb_anchor rx_pool;
+ struct usb_anchor tx_wait;
+ struct usb_anchor tx_anch;
+ struct usb_anchor tx_cmd;
+ struct usb_anchor tx_err;
+ struct tasklet_struct usb_tasklet;
+ atomic_t tx_cmd_urbs;
+ atomic_t tx_anch_urbs;
+ atomic_t rx_anch_urbs;
+ atomic_t rx_work_urbs;
+ atomic_t rx_pool_urbs;
+ kernel_ulong_t features;
+
+ /* firmware settings */
+ struct completion fw_load_wait;
+ struct completion fw_boot_wait;
+ struct {
+ const struct carl9170fw_desc_head *desc;
+ const struct firmware *fw;
+ unsigned int offset;
+ unsigned int address;
+ unsigned int cmd_bufs;
+ unsigned int api_version;
+ unsigned int vif_num;
+ unsigned int err_counter;
+ unsigned int bug_counter;
+ u32 beacon_addr;
+ unsigned int beacon_max_len;
+ bool rx_stream;
+ bool tx_stream;
+ unsigned int mem_blocks;
+ unsigned int mem_block_size;
+ unsigned int rx_size;
+ } fw;
+
+ /* reset / stuck frames/queue detection */
+ struct work_struct restart_work;
+ unsigned int restart_counter;
+ unsigned long queue_stop_timeout[__AR9170_NUM_TXQ];
+ unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ];
+ bool needs_full_reset;
+ atomic_t pending_restarts;
+
+ /* interface mode settings */
+ struct list_head vif_list;
+ unsigned long vif_bitmap;
+ unsigned int vifs;
+ struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC];
+
+ /* beaconing */
+ spinlock_t beacon_lock;
+ unsigned int global_pretbtt;
+ unsigned int global_beacon_int;
+ struct carl9170_vif_info *beacon_iter;
+ unsigned int beacon_enabled;
+
+ /* cryptographic engine */
+ u64 usedkeys;
+ bool rx_software_decryption;
+ bool disable_offload;
+
+ /* filter settings */
+ u64 cur_mc_hash;
+ u32 cur_filter;
+ unsigned int filter_state;
+ bool sniffer_enabled;
+
+ /* MAC */
+ enum carl9170_erp_modes erp_mode;
+
+ /* PHY */
+ struct ieee80211_channel *channel;
+ int noise[6];
+ unsigned int chan_fail;
+ unsigned int total_chan_fail;
+ u8 heavy_clip;
+
+ /* power calibration data */
+ u8 power_5G_leg[4];
+ u8 power_2G_cck[4];
+ u8 power_2G_ofdm[4];
+ u8 power_5G_ht20[8];
+ u8 power_5G_ht40[8];
+ u8 power_2G_ht20[8];
+ u8 power_2G_ht40[8];
+
+#ifdef CONFIG_CARL9170_LEDS
+ /* LED */
+ struct delayed_work led_work;
+ struct carl9170_led leds[AR9170_NUM_LEDS];
+#endif /* CONFIG_CARL9170_LEDS */
+
+ /* qos queue settings */
+ spinlock_t tx_stats_lock;
+ struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ];
+ struct ieee80211_tx_queue_params edcf[5];
+ struct completion tx_flush;
+
+ /* CMD */
+ int cmd_seq;
+ int readlen;
+ u8 *readbuf;
+ spinlock_t cmd_lock;
+ struct completion cmd_wait;
+ union {
+ __le32 cmd_buf[PAYLOAD_MAX + 1];
+ struct carl9170_cmd cmd;
+ struct carl9170_rsp rsp;
+ };
+
+ /* statistics */
+ unsigned int tx_dropped;
+ unsigned int tx_ack_failures;
+ unsigned int tx_fcs_errors;
+ unsigned int tx_ampdu_timeout;
+ unsigned int rx_dropped;
+
+ /* EEPROM */
+ struct ar9170_eeprom eeprom;
+
+ /* tx queuing */
+ struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
+ struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
+ struct delayed_work tx_janitor;
+ unsigned long tx_janitor_last_run;
+ bool tx_schedule;
+
+ /* tx ampdu */
+ struct work_struct ampdu_work;
+ spinlock_t tx_ampdu_list_lock;
+ struct carl9170_sta_tid *tx_ampdu_iter;
+ struct list_head tx_ampdu_list;
+ atomic_t tx_ampdu_upload;
+ atomic_t tx_ampdu_scheduler;
+ atomic_t tx_total_pending;
+ atomic_t tx_total_queued;
+ unsigned int tx_ampdu_list_len;
+ int current_density;
+ int current_factor;
+ bool tx_ampdu_schedule;
+
+ /* internal memory management */
+ spinlock_t mem_lock;
+ unsigned long *mem_bitmap;
+ atomic_t mem_free_blocks;
+ atomic_t mem_allocs;
+
+ /* rxstream mpdu merge */
+ struct ar9170_rx_head rx_plcp;
+ bool rx_has_plcp;
+ struct sk_buff *rx_failover;
+ int rx_failover_missing;
+
+#ifdef CONFIG_CARL9170_WPC
+ struct {
+ bool pbc_state;
+ struct input_dev *pbc;
+ char name[32];
+ char phys[32];
+ } wps;
+#endif /* CONFIG_CARL9170_WPC */
+
+#ifdef CONFIG_CARL9170_DEBUGFS
+ struct carl9170_debug debug;
+ struct dentry *debug_dir;
+#endif /* CONFIG_CARL9170_DEBUGFS */
+
+ /* PSM */
+ struct work_struct ps_work;
+ struct {
+ unsigned int dtim_counter;
+ unsigned long last_beacon;
+ unsigned long last_action;
+ unsigned long last_slept;
+ unsigned int sleep_ms;
+ unsigned int off_override;
+ bool state;
+ } ps;
+};
+
+enum carl9170_ps_off_override_reasons {
+ PS_OFF_VIF = BIT(0),
+ PS_OFF_BCN = BIT(1),
+ PS_OFF_5GHZ = BIT(2),
+};
+
+struct carl9170_ba_stats {
+ u8 ampdu_len;
+ u8 ampdu_ack_len;
+ bool clear;
+};
+
+struct carl9170_sta_info {
+ bool ht_sta;
+ unsigned int ampdu_max_len;
+ struct carl9170_sta_tid *agg[CARL9170_NUM_TID];
+ struct carl9170_ba_stats stats[CARL9170_NUM_TID];
+};
+
+struct carl9170_tx_info {
+ unsigned long timeout;
+ struct ar9170 *ar;
+ struct kref ref;
+};
+
+#define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s))
+#define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED))
+#define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE))
+#define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED))
+
+static inline void __carl9170_set_state(struct ar9170 *ar,
+ enum carl9170_device_state newstate)
+{
+ ar->state = newstate;
+}
+
+static inline void carl9170_set_state(struct ar9170 *ar,
+ enum carl9170_device_state newstate)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->state_lock, flags);
+ __carl9170_set_state(ar, newstate);
+ spin_unlock_irqrestore(&ar->state_lock, flags);
+}
+
+static inline void carl9170_set_state_when(struct ar9170 *ar,
+ enum carl9170_device_state min, enum carl9170_device_state newstate)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->state_lock, flags);
+ if (CHK_DEV_STATE(ar, min))
+ __carl9170_set_state(ar, newstate);
+ spin_unlock_irqrestore(&ar->state_lock, flags);
+}
+
+/* exported interface */
+void *carl9170_alloc(size_t priv_size);
+int carl9170_register(struct ar9170 *ar);
+void carl9170_unregister(struct ar9170 *ar);
+void carl9170_free(struct ar9170 *ar);
+void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r);
+void carl9170_ps_check(struct ar9170 *ar);
+
+/* USB back-end */
+int carl9170_usb_open(struct ar9170 *ar);
+void carl9170_usb_stop(struct ar9170 *ar);
+void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb);
+void carl9170_usb_handle_tx_err(struct ar9170 *ar);
+int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids,
+ u32 plen, void *payload, u32 rlen, void *resp);
+int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
+ const bool free_buf);
+int carl9170_usb_restart(struct ar9170 *ar);
+void carl9170_usb_reset(struct ar9170 *ar);
+
+/* MAC */
+int carl9170_init_mac(struct ar9170 *ar);
+int carl9170_set_qos(struct ar9170 *ar);
+int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
+int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
+ const u8 *mac);
+int carl9170_set_operating_mode(struct ar9170 *ar);
+int carl9170_set_beacon_timers(struct ar9170 *ar);
+int carl9170_set_dyn_sifs_ack(struct ar9170 *ar);
+int carl9170_set_rts_cts_rate(struct ar9170 *ar);
+int carl9170_set_ampdu_settings(struct ar9170 *ar);
+int carl9170_set_slot_time(struct ar9170 *ar);
+int carl9170_set_mac_rates(struct ar9170 *ar);
+int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry);
+int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
+int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,
+ const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen);
+int carl9170_disable_key(struct ar9170 *ar, const u8 id);
+
+/* RX */
+void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len);
+void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
+
+/* TX */
+int carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
+void carl9170_tx_janitor(struct work_struct *work);
+void carl9170_tx_process_status(struct ar9170 *ar,
+ const struct carl9170_rsp *cmd);
+void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+ const bool success);
+void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
+void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb);
+void carl9170_tx_scheduler(struct ar9170 *ar);
+void carl9170_tx_get_skb(struct sk_buff *skb);
+int carl9170_tx_put_skb(struct sk_buff *skb);
+
+/* LEDs */
+#ifdef CONFIG_CARL9170_LEDS
+int carl9170_led_register(struct ar9170 *ar);
+void carl9170_led_unregister(struct ar9170 *ar);
+#endif /* CONFIG_CARL9170_LEDS */
+int carl9170_led_init(struct ar9170 *ar);
+int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state);
+
+/* PHY / RF */
+int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
+ enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi);
+int carl9170_get_noisefloor(struct ar9170 *ar);
+
+/* FW */
+int carl9170_parse_firmware(struct ar9170 *ar);
+int carl9170_fw_fix_eeprom(struct ar9170 *ar);
+
+extern struct ieee80211_rate __carl9170_ratetable[];
+extern int modparam_noht;
+
+static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif)
+{
+ return container_of(carl_vif, struct ar9170,
+ vif_priv[carl_vif->id]);
+}
+
+static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb)
+{
+ return (void *)((struct _carl9170_tx_superframe *)
+ skb->data)->frame_data;
+}
+
+static inline u16 get_seq_h(struct ieee80211_hdr *hdr)
+{
+ return le16_to_cpu(hdr->seq_ctrl) >> 4;
+}
+
+static inline u16 carl9170_get_seq(struct sk_buff *skb)
+{
+ return get_seq_h(carl9170_get_hdr(skb));
+}
+
+static inline u16 get_tid_h(struct ieee80211_hdr *hdr)
+{
+ return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
+}
+
+static inline u16 carl9170_get_tid(struct sk_buff *skb)
+{
+ return get_tid_h(carl9170_get_hdr(skb));
+}
+
+static inline struct ieee80211_vif *
+carl9170_get_vif(struct carl9170_vif_info *priv)
+{
+ return container_of((void *)priv, struct ieee80211_vif, drv_priv);
+}
+
+/* Protected by ar->mutex or RCU */
+static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar)
+{
+ struct carl9170_vif_info *cvif;
+
+ list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
+ if (cvif->active)
+ return carl9170_get_vif(cvif);
+ }
+
+ return NULL;
+}
+
+static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif)
+{
+ bool ret;
+
+ rcu_read_lock();
+ ret = (carl9170_get_main_vif(ar) == vif);
+ rcu_read_unlock();
+ return ret;
+}
+
+#endif /* __CARL9170_H */
--- /dev/null
+/*
+ * 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])))
+ 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[0], 3, 15, 1023, 0); /* BEST EFFORT */
+ CARL9170_FILL_QUEUE(ar->edcf[1], 2, 7, 15, 94); /* VIDEO */
+ CARL9170_FILL_QUEUE(ar->edcf[2], 2, 3, 7, 47); /* VOICE */
+ CARL9170_FILL_QUEUE(ar->edcf[3], 7, 15, 1023, 0); /* BACKGROUND */
+ CARL9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
+
+ 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;
+
+ 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->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 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 {
+ err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
+ rcu_read_unlock();
+
+ if (err)
+ goto unlock;
+ }
+
+unlock:
+ if (err && (vif_id != -1)) {
+ 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 | FIF_FCSFAIL | FIF_PLCPFAIL |
+ FIF_OTHER_BSS | FIF_PROMISC_IN_BSS;
+
+ 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 (changed_flags & FIF_ALLMULTI && *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));
+ }
+
+ 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 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;
+
+ /*
+ * We have to fall back to software encryption, whenever
+ * the user choose to participates in an IBSS or 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))
+ 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;
+ 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;
+
+ 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 < CARL9170_NUM_TID; i++)
+ rcu_assign_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 < CARL9170_NUM_TID; i++) {
+ struct carl9170_sta_tid *tid_info;
+
+ tid_info = rcu_dereference(sta_info->agg[i]);
+ rcu_assign_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, u16 queue,
+ const struct ieee80211_tx_queue_params *param)
+{
+ struct ar9170 *ar = hw->priv;
+ int ret;
+
+ mutex_lock(&ar->mutex);
+ if (queue < ar->hw->queues) {
+ memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param));
+ ret = carl9170_set_qos(ar);
+ } else {
+ ret = -EINVAL;
+ }
+
+ 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,
+ enum ieee80211_ampdu_mlme_action action,
+ struct ieee80211_sta *sta,
+ u16 tid, u16 *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 (WARN_ON_ONCE(!sta_info->ht_sta))
+ return -EOPNOTSUPP;
+
+ rcu_read_lock();
+ if (rcu_dereference(sta_info->agg[tid])) {
+ rcu_read_unlock();
+ return -EBUSY;
+ }
+
+ tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
+ GFP_ATOMIC);
+ if (!tid_info) {
+ rcu_read_unlock();
+ 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;
+
+ 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);
+ rcu_read_unlock();
+
+ ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+ break;
+
+ case IEEE80211_AMPDU_TX_STOP:
+ 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_assign_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;
+
+ 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 */
+
+static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
+ struct survey_info *survey)
+{
+ struct ar9170 *ar = hw->priv;
+ int err;
+
+ if (idx != 0)
+ return -ENOENT;
+
+ mutex_lock(&ar->mutex);
+ err = carl9170_get_noisefloor(ar);
+ mutex_unlock(&ar->mutex);
+ if (err)
+ return err;
+
+ survey->channel = ar->channel;
+ survey->filled = SURVEY_INFO_NOISE_DBM;
+ survey->noise = ar->noise[0];
+ return 0;
+}
+
+static void carl9170_op_flush(struct ieee80211_hw *hw, 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 ar9170 *ar = hw->priv;
+ struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
+ struct sk_buff *skb;
+ struct sk_buff_head free;
+ int i;
+
+ switch (cmd) {
+ case STA_NOTIFY_SLEEP:
+ /*
+ * Since the peer is no longer listening, we have to return
+ * as many SKBs as possible back to the mac80211 stack.
+ * It will deal with the retry procedure, once the peer
+ * has become available again.
+ *
+ * NB: Ideally, the driver should return the all frames in
+ * the correct, ascending order. However, I think that this
+ * functionality should be implemented in the stack and not
+ * here...
+ */
+
+ __skb_queue_head_init(&free);
+
+ if (sta->ht_cap.ht_supported) {
+ rcu_read_lock();
+ for (i = 0; i < CARL9170_NUM_TID; i++) {
+ struct carl9170_sta_tid *tid_info;
+
+ tid_info = rcu_dereference(sta_info->agg[i]);
+
+ if (!tid_info)
+ continue;
+
+ spin_lock_bh(&ar->tx_ampdu_list_lock);
+ if (tid_info->state >
+ CARL9170_TID_STATE_SUSPEND)
+ tid_info->state =
+ CARL9170_TID_STATE_SUSPEND;
+ spin_unlock_bh(&ar->tx_ampdu_list_lock);
+
+ spin_lock_bh(&tid_info->lock);
+ while ((skb = __skb_dequeue(&tid_info->queue)))
+ __skb_queue_tail(&free, skb);
+ spin_unlock_bh(&tid_info->lock);
+
+ ieee80211_stop_tx_ba_session(sta,
+ tid_info->tid);
+ }
+ rcu_read_unlock();
+ }
+
+ for (i = 0; i < ar->hw->queues; i++) {
+ spin_lock_bh(&ar->tx_pending[i].lock);
+ skb_queue_walk(&ar->tx_pending[i], skb) {
+ struct _carl9170_tx_superframe *super;
+ struct ieee80211_hdr *hdr;
+
+ super = (void *) skb->data;
+ hdr = (void *) super->frame_data;
+
+ if (compare_ether_addr(hdr->addr1, sta->addr))
+ continue;
+
+ __skb_unlink(skb, &ar->tx_pending[i]);
+ carl9170_tx_status(ar, skb, false);
+ }
+ spin_unlock_bh(&ar->tx_pending[i].lock);
+ }
+
+ while ((skb = __skb_dequeue(&free)))
+ carl9170_tx_status(ar, skb, false);
+
+ break;
+
+ case STA_NOTIFY_AWAKE:
+ if (!sta->ht_cap.ht_supported)
+ return;
+
+ rcu_read_lock();
+ for (i = 0; i < CARL9170_NUM_TID; i++) {
+ struct carl9170_sta_tid *tid_info;
+
+ tid_info = rcu_dereference(sta_info->agg[i]);
+
+ if (!tid_info)
+ continue;
+
+ if ((tid_info->state == CARL9170_TID_STATE_SUSPEND))
+ tid_info->state = CARL9170_TID_STATE_IDLE;
+ }
+ rcu_read_unlock();
+ break;
+ }
+}
+
+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,
+};
+
+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_WORK(&ar->ps_work, carl9170_ps_work);
+ INIT_WORK(&ar->restart_work, carl9170_restart_work);
+ INIT_WORK(&ar->ampdu_work, carl9170_ampdu_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);
+
+ /*
+ * Note:
+ * IBSS/ADHOC and AP mode are only enabled, if the firmware
+ * supports these modes. The code which will add the
+ * additional interface_modes is in fw.c.
+ */
+ hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+
+ hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+ IEEE80211_HW_SUPPORTS_PS |
+ IEEE80211_HW_PS_NULLFUNC_STACK |
+ IEEE80211_HW_SIGNAL_DBM;
+
+ if (!modparam_noht) {
+ /*
+ * see the comment above, why we allow the user
+ * to disable HT by a module parameter.
+ */
+ hw->flags |= IEEE80211_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 */
+
+ hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
+ 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;
+
+ 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[IEEE80211_BAND_2GHZ] =
+ &carl9170_band_2GHz;
+ bands++;
+ }
+ if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
+ ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
+ &carl9170_band_5GHz;
+ bands++;
+ }
+
+ /*
+ * I measured this, a bandswitch takes roughly
+ * 135 ms and a frequency switch about 80.
+ *
+ * FIXME: measure these values again once EEPROM settings
+ * are used, that will influence them!
+ */
+ if (bands == 2)
+ ar->hw->channel_change_time = 135 * 1000;
+ else
+ ar->hw->channel_change_time = 80 * 1000;
+
+ regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
+ regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
+
+ /* second part of wiphy init */
+ SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
+
+ return bands ? 0 : -EINVAL;
+}
+
+static int carl9170_reg_notifier(struct wiphy *wiphy,
+ struct regulatory_request *request)
+{
+ struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+ struct ar9170 *ar = hw->priv;
+
+ return 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 = kzalloc(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_fw_fix_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_CAR9L170_LEDS */
+
+#ifdef CONFIG_CARL9170_WPC
+ err = carl9170_register_wps_button(ar);
+ if (err)
+ goto err_unreg;
+#endif /* CONFIG_CARL9170_WPC */
+
+ 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 */
+
+ 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;
+
+ mutex_destroy(&ar->mutex);
+
+ ieee80211_free_hw(ar->hw);
+}
projects / platform / kernel / linux-rpi.git / commitdiff