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Commit fe8ee9ad authored by Christian Lamparter's avatar Christian Lamparter Committed by John W. Linville
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carl9170: mac80211 glue and command interface 

Signed-off-by: default avatarChristian Lamparter <chunkeey@googlemail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 743e015d
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drivers/net/wireless/ath/carl9170/carl9170.h 0 → 100644
View file @ fe8ee9ad
/*
* 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 */
drivers/net/wireless/ath/carl9170/cmd.c 0 → 100644
View file @ fe8ee9ad
/*
* Atheros CARL9170 driver
*
* Basic HW register/memory/command access functions
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
*
* 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 "carl9170.h"
#include "cmd.h"
int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
{
__le32 buf[2] = {
cpu_to_le32(reg),
cpu_to_le32(val),
};
int err;
err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, sizeof(buf),
(u8 *) buf, 0, NULL);
if (err) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "writing reg %#x "
"(val %#x) failed (%d)\n", reg, val, err);
}
}
return err;
}
int carl9170_read_mreg(struct ar9170 *ar, const int nregs,
const u32 *regs, u32 *out)
{
int i, err;
__le32 *offs, *res;
/* abuse "out" for the register offsets, must be same length */
offs = (__le32 *)out;
for (i = 0; i < nregs; i++)
offs[i] = cpu_to_le32(regs[i]);
/* also use the same buffer for the input */
res = (__le32 *)out;
err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
4 * nregs, (u8 *)offs,
4 * nregs, (u8 *)res);
if (err) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n",
err);
}
return err;
}
/* convert result to cpu endian */
for (i = 0; i < nregs; i++)
out[i] = le32_to_cpu(res[i]);
return 0;
}
int carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
{
return carl9170_read_mreg(ar, 1, &reg, val);
}
int carl9170_echo_test(struct ar9170 *ar, const u32 v)
{
u32 echores;
int err;
err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO,
4, (u8 *)&v,
4, (u8 *)&echores);
if (err)
return err;
if (v != echores) {
wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores);
return -EINVAL;
}
return 0;
}
struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
const enum carl9170_cmd_oids cmd, const unsigned int len)
{
struct carl9170_cmd *tmp;
tmp = kzalloc(sizeof(struct carl9170_cmd_head) + len, GFP_ATOMIC);
if (tmp) {
tmp->hdr.cmd = cmd;
tmp->hdr.len = len;
}
return tmp;
}
int carl9170_reboot(struct ar9170 *ar)
{
struct carl9170_cmd *cmd;
int err;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_REBOOT_ASYNC, 0);
if (!cmd)
return -ENOMEM;
err = __carl9170_exec_cmd(ar, (struct carl9170_cmd *)cmd, true);
return err;
}
int carl9170_mac_reset(struct ar9170 *ar)
{
return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST,
0, NULL, 0, NULL);
}
int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
const u32 mode, const u32 addr, const u32 len)
{
struct carl9170_cmd *cmd;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_BCN_CTRL_ASYNC,
sizeof(struct carl9170_bcn_ctrl_cmd));
if (!cmd)
return -ENOMEM;
cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id);
cmd->bcn_ctrl.mode = cpu_to_le32(mode);
cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr);
cmd->bcn_ctrl.bcn_len = cpu_to_le32(len);
return __carl9170_exec_cmd(ar, cmd, true);
}
int carl9170_powersave(struct ar9170 *ar, const bool ps)
{
struct carl9170_cmd *cmd;
u32 state;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_PSM_ASYNC,
sizeof(struct carl9170_psm));
if (!cmd)
return -ENOMEM;
if (ps) {
/* Sleep until next TBTT */
state = CARL9170_PSM_SLEEP | 1;
} else {
/* wake up immediately */
state = 1;
}
cmd->psm.state = cpu_to_le32(state);
return __carl9170_exec_cmd(ar, cmd, true);
}
drivers/net/wireless/ath/carl9170/cmd.h 0 → 100644
View file @ fe8ee9ad
/*
* Atheros CARL9170 driver
*
* Basic HW register/memory/command access functions
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
* Copyright 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 __CMD_H
#define __CMD_H
#include "carl9170.h"
/* basic HW access */
int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val);
int carl9170_read_reg(struct ar9170 *ar, const u32 reg, u32 *val);
int carl9170_read_mreg(struct ar9170 *ar, const int nregs,
const u32 *regs, u32 *out);
int carl9170_echo_test(struct ar9170 *ar, u32 v);
int carl9170_reboot(struct ar9170 *ar);
int carl9170_mac_reset(struct ar9170 *ar);
int carl9170_powersave(struct ar9170 *ar, const bool power_on);
int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
const u32 mode, const u32 addr, const u32 len);
static inline int carl9170_flush_cab(struct ar9170 *ar,
const unsigned int vif_id)
{
return carl9170_bcn_ctrl(ar, vif_id, CARL9170_BCN_CTRL_DRAIN, 0, 0);
}
struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
const enum carl9170_cmd_oids cmd, const unsigned int len);
/*
* Macros to facilitate writing multiple registers in a single
* write-combining USB command. Note that when the first group
* fails the whole thing will fail without any others attempted,
* but you won't know which write in the group failed.
*/
#define carl9170_regwrite_begin(ar) \
do { \
int __nreg = 0, __err = 0; \
struct ar9170 *__ar = ar;
#define carl9170_regwrite(r, v) do { \
__ar->cmd_buf[2 * __nreg + 1] = cpu_to_le32(r); \
__ar->cmd_buf[2 * __nreg + 2] = cpu_to_le32(v); \
__nreg++; \
if ((__nreg >= PAYLOAD_MAX/2)) { \
if (IS_ACCEPTING_CMD(__ar)) \
__err = carl9170_exec_cmd(__ar, \
CARL9170_CMD_WREG, 8 * __nreg, \
(u8 *) &__ar->cmd_buf[1], 0, NULL); \
else \
goto __regwrite_out; \
\
__nreg = 0; \
if (__err) \
goto __regwrite_out; \
} \
} while (0)
#define carl9170_regwrite_finish() \
__regwrite_out : \
if (__err == 0 && __nreg) { \
if (IS_ACCEPTING_CMD(__ar)) \
__err = carl9170_exec_cmd(__ar, \
CARL9170_CMD_WREG, 8 * __nreg, \
(u8 *) &__ar->cmd_buf[1], 0, NULL); \
__nreg = 0; \
}
#define carl9170_regwrite_result() \
__err; \
} while (0);
#define carl9170_async_get_buf() \
do { \
__cmd = carl9170_cmd_buf(__carl, CARL9170_CMD_WREG_ASYNC, \
CARL9170_MAX_CMD_PAYLOAD_LEN); \
if (__cmd == NULL) { \
__err = -ENOMEM; \
goto __async_regwrite_out; \
} \
} while (0);
#define carl9170_async_regwrite_begin(carl) \
do { \
int __nreg = 0, __err = 0; \
struct ar9170 *__carl = carl; \
struct carl9170_cmd *__cmd; \
carl9170_async_get_buf(); \
#define carl9170_async_regwrite(r, v) do { \
__cmd->wreg.regs[__nreg].addr = cpu_to_le32(r); \
__cmd->wreg.regs[__nreg].val = cpu_to_le32(v); \
__nreg++; \
if ((__nreg >= PAYLOAD_MAX/2)) { \
if (IS_ACCEPTING_CMD(__carl)) { \
__cmd->hdr.len = 8 * __nreg; \
__err = __carl9170_exec_cmd(__carl, __cmd, true);\
__cmd = NULL; \
carl9170_async_get_buf(); \
} else { \
goto __async_regwrite_out; \
} \
__nreg = 0; \
if (__err) \
goto __async_regwrite_out; \
} \
} while (0)
#define carl9170_async_regwrite_finish() \
__async_regwrite_out : \
if (__err == 0 && __nreg) { \
__cmd->hdr.len = 8 * __nreg; \
if (IS_ACCEPTING_CMD(__carl)) \
__err = __carl9170_exec_cmd(__carl, __cmd, true);\
__nreg = 0; \
}
#define carl9170_async_regwrite_result() \
__err; \
} while (0);
#endif /* __CMD_H */
drivers/net/wireless/ath/carl9170/led.c 0 → 100644
View file @ fe8ee9ad
/*
* Atheros CARL9170 driver
*
* LED handling
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
* Copyright 2009, 2010, Christian Lamparer <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 "carl9170.h"
#include "cmd.h"
int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state)
{
return carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_DATA, led_state);
}
int carl9170_led_init(struct ar9170 *ar)
{
int err;
/* disable LEDs */
/* GPIO [0/1 mode: output, 2/3: input] */
err = carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
if (err)
goto out;
/* GPIO 0/1 value: off */
err = carl9170_led_set_state(ar, 0);
out:
return err;
}
#ifdef CONFIG_CARL9170_LEDS
static void carl9170_led_update(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
int i, tmp = 300, blink_delay = 1000;
u32 led_val = 0;
bool rerun = false;
if (!IS_ACCEPTING_CMD(ar))
return;
mutex_lock(&ar->mutex);
for (i = 0; i < AR9170_NUM_LEDS; i++) {
if (ar->leds[i].registered) {
if (ar->leds[i].last_state ||
ar->leds[i].toggled) {
if (ar->leds[i].toggled)
tmp = 70 + 200 / (ar->leds[i].toggled);
if (tmp < blink_delay)
blink_delay = tmp;
led_val |= 1 << i;
ar->leds[i].toggled = 0;
rerun = true;
}
}
}
carl9170_led_set_state(ar, led_val);
mutex_unlock(&ar->mutex);
if (!rerun)
return;
ieee80211_queue_delayed_work(ar->hw,
&ar->led_work,
msecs_to_jiffies(blink_delay));
}
static void carl9170_led_set_brightness(struct led_classdev *led,
enum led_brightness brightness)
{
struct carl9170_led *arl = container_of(led, struct carl9170_led, l);
struct ar9170 *ar = arl->ar;
if (!arl->registered)
return;
if (arl->last_state != !!brightness) {
arl->toggled++;
arl->last_state = !!brightness;
}
if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
ieee80211_queue_delayed_work(ar->hw, &ar->led_work, HZ/10);
}
static int carl9170_led_register_led(struct ar9170 *ar, int i, char *name,
char *trigger)
{
int err;
snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
"carl9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
ar->leds[i].ar = ar;
ar->leds[i].l.name = ar->leds[i].name;
ar->leds[i].l.brightness_set = carl9170_led_set_brightness;
ar->leds[i].l.brightness = 0;
ar->leds[i].l.default_trigger = trigger;
err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
&ar->leds[i].l);
if (err) {
wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n",
ar->leds[i].name, err);
} else {
ar->leds[i].registered = true;
}
return err;
}
void carl9170_led_unregister(struct ar9170 *ar)
{
int i;
for (i = 0; i < AR9170_NUM_LEDS; i++)
if (ar->leds[i].registered) {
led_classdev_unregister(&ar->leds[i].l);
ar->leds[i].registered = false;
ar->leds[i].toggled = 0;
}
cancel_delayed_work_sync(&ar->led_work);
}
int carl9170_led_register(struct ar9170 *ar)
{
int err;
INIT_DELAYED_WORK(&ar->led_work, carl9170_led_update);
err = carl9170_led_register_led(ar, 0, "tx",
ieee80211_get_tx_led_name(ar->hw));
if (err)
goto fail;
if (ar->features & CARL9170_ONE_LED)
return 0;
err = carl9170_led_register_led(ar, 1, "assoc",
ieee80211_get_assoc_led_name(ar->hw));
if (err)
goto fail;
return 0;
fail:
carl9170_led_unregister(ar);
return err;
}
#endif /* CONFIG_CARL9170_LEDS */
drivers/net/wireless/ath/carl9170/main.c 0 → 100644
View file @ fe8ee9ad
/*
* 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);
}
drivers/net/wireless/ath/carl9170/version.h 0 → 100644
View file @ fe8ee9ad
#ifndef __CARL9170_SHARED_VERSION_H
#define __CARL9170_SHARED_VERSION_H
#define CARL9170FW_VERSION_YEAR 10
#define CARL9170FW_VERSION_MONTH 8
#define CARL9170FW_VERSION_DAY 30
#define CARL9170FW_VERSION_GIT "1.8.8.1"
#endif /* __CARL9170_SHARED_VERSION_H */
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