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linux/drivers/net/wireless/ath/carl9170/carl9170.h
Ronald Wahl 671796dd96 carl9170: fix sending URBs with wrong type when using full-speed 
The driver assumes that endpoint 4 is always an interrupt endpoint.
Unfortunately the type differs between high-speed and full-speed
configurations while in the former case it is indeed an interrupt
endpoint this is not true for the latter case - here it is a bulk
endpoint. When sending URBs with the wrong type the kernel will
generate a warning message including backtrace. In this specific
case there will be a huge amount of warnings which can bring the system
to freeze.

To fix this we are now sending URBs to endpoint 4 using the type
found in the endpoint descriptor.

A side note: The carl9170 firmware currently specifies endpoint 4 as
interrupt endpoint even in the full-speed configuration but this has
no relevance because before this firmware is loaded the endpoint type
is as described above and after the firmware is running the stick is not
reenumerated and so the old descriptor is used.

Signed-off-by: Ronald Wahl <ronald.wahl@raritan.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2014-08-11 14:43:51 -04:00

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/*
* 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 <linux/hw_random.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
#include <linux/usb.h>
#ifdef CONFIG_CARL9170_LEDS
#include <linux/leds.h>
#endif /* CONFIG_CARL9170_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)
static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 };
#define CARL9170_MAX_RX_BUFFER_SIZE 8192
enum carl9170_device_state {
CARL9170_UNKNOWN_STATE,
CARL9170_STOPPED,
CARL9170_IDLE,
CARL9170_STARTED,
};
#define WME_BA_BMP_SIZE 64
#define CARL9170_TX_USER_RATE_TRIES 3
#define TID_TO_WME_AC(_tid) \
((((_tid) == 0) || ((_tid) == 3)) ? IEEE80211_AC_BE : \
(((_tid) == 1) || ((_tid) == 2)) ? IEEE80211_AC_BK : \
(((_tid) == 4) || ((_tid) == 5)) ? IEEE80211_AC_VI : \
IEEE80211_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;
struct ieee80211_sta *sta;
struct ieee80211_vif *vif;
};
#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_STAT_WORK 30000
#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 enormous 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 __rcu *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_UNRESPONSIVE_DEVICE,
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;
bool usb_ep_cmd_is_bulk;
/* 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;
bool rx_filter;
bool hw_counters;
unsigned int mem_blocks;
unsigned int mem_block_size;
unsigned int rx_size;
unsigned int tx_seq_table;
bool ba_filter;
bool disable_offload_fw;
} fw;
/* interface configuration combinations */
struct ieee80211_iface_limit if_comb_limits[1];
struct ieee80211_iface_combination if_combs[1];
/* reset / stuck frames/queue detection */
struct work_struct restart_work;
struct work_struct ping_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;
bool force_usb_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 __rcu *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;
unsigned int rx_filter_caps;
bool sniffer_enabled;
/* MAC */
enum carl9170_erp_modes erp_mode;
/* PHY */
struct ieee80211_channel *channel;
unsigned int num_channels;
int noise[4];
unsigned int chan_fail;
unsigned int total_chan_fail;
u8 heavy_clip;
u8 ht_settings;
struct {
u64 active; /* usec */
u64 cca; /* usec */
u64 tx_time; /* usec */
u64 rx_total;
u64 rx_overrun;
} tally;
struct delayed_work stat_work;
struct survey_info *survey;
/* 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 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 __rcu *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;
u32 ampdu_ref;
/* FIFO for collecting outstanding BlockAckRequest */
struct list_head bar_list[__AR9170_NUM_TXQ];
spinlock_t bar_list_lock[__AR9170_NUM_TXQ];
#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;
#ifdef CONFIG_CARL9170_HWRNG
# define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN
struct {
struct hwrng rng;
bool initialized;
char name[30 + 1];
u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)];
unsigned int cache_idx;
} rng;
#endif /* CONFIG_CARL9170_HWRNG */
};
enum carl9170_ps_off_override_reasons {
PS_OFF_VIF = BIT(0),
PS_OFF_BCN = BIT(1),
};
struct carl9170_bar_list_entry {
struct list_head list;
struct rcu_head head;
struct sk_buff *skb;
};
struct carl9170_ba_stats {
u8 ampdu_len;
u8 ampdu_ack_len;
bool clear;
bool req;
};
struct carl9170_sta_info {
bool ht_sta;
bool sleeping;
atomic_t pending_frames;
unsigned int ampdu_max_len;
struct carl9170_sta_tid __rcu *agg[IEEE80211_NUM_TIDS];
struct carl9170_ba_stats stats[IEEE80211_NUM_TIDS];
};
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_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);
int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel);
/* 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 */
void carl9170_op_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
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);
int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
/* 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);
int carl9170_get_noisefloor(struct ar9170 *ar);
/* FW */
int carl9170_parse_firmware(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 */
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