mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 18:53:24 +00:00
f3926b49b7
This patch removes the incomplete AMPDU implementation in ar9170usb. The code in question is: * too big and complex (more than 550 SLOC.) This is enough to qualify for a new separate code file! * unbalanced quantity & quality over-engineered areas like: * xmit scheduling and queuing frames for multiple HT peers * redundant frame sorting are confronted by gaping holes: * accurate transmission feedback * firmware error-handling and device reset * HT rate control algorithm * error-prone Since its inclusion, hardly anything was done to fix any of the outlined flaws from the initial commit message. => This also indicates poor maintainability. * relies heavily on several spinlocks. As a result of this shortcomings, the code is slow and does not even support the most basic 11n requirement: HT station mode. Therefore, I request to purge my heap of **** from the kernel: "ar9170: implement transmit aggregation". The next item on the agenda is: (re-)start from scratch with an adequate design to accommodate the special requirements and features of the available frameworks and tools. Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
259 lines
7.1 KiB
C
259 lines
7.1 KiB
C
/*
|
|
* Atheros AR9170 driver
|
|
*
|
|
* Driver specific definitions
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef __AR9170_H
|
|
#define __AR9170_H
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/spinlock.h>
|
|
#include <net/cfg80211.h>
|
|
#include <net/mac80211.h>
|
|
#ifdef CONFIG_AR9170_LEDS
|
|
#include <linux/leds.h>
|
|
#endif /* CONFIG_AR9170_LEDS */
|
|
#include "eeprom.h"
|
|
#include "hw.h"
|
|
|
|
#include "../regd.h"
|
|
|
|
#define PAYLOAD_MAX (AR9170_MAX_CMD_LEN/4 - 1)
|
|
|
|
enum ar9170_bw {
|
|
AR9170_BW_20,
|
|
AR9170_BW_40_BELOW,
|
|
AR9170_BW_40_ABOVE,
|
|
|
|
__AR9170_NUM_BW,
|
|
};
|
|
|
|
static inline enum ar9170_bw nl80211_to_ar9170(enum nl80211_channel_type type)
|
|
{
|
|
switch (type) {
|
|
case NL80211_CHAN_NO_HT:
|
|
case NL80211_CHAN_HT20:
|
|
return AR9170_BW_20;
|
|
case NL80211_CHAN_HT40MINUS:
|
|
return AR9170_BW_40_BELOW;
|
|
case NL80211_CHAN_HT40PLUS:
|
|
return AR9170_BW_40_ABOVE;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
enum ar9170_rf_init_mode {
|
|
AR9170_RFI_NONE,
|
|
AR9170_RFI_WARM,
|
|
AR9170_RFI_COLD,
|
|
};
|
|
|
|
#define AR9170_MAX_RX_BUFFER_SIZE 8192
|
|
|
|
#ifdef CONFIG_AR9170_LEDS
|
|
struct ar9170;
|
|
|
|
struct ar9170_led {
|
|
struct ar9170 *ar;
|
|
struct led_classdev l;
|
|
char name[32];
|
|
unsigned int toggled;
|
|
bool last_state;
|
|
bool registered;
|
|
};
|
|
|
|
#endif /* CONFIG_AR9170_LEDS */
|
|
|
|
enum ar9170_device_state {
|
|
AR9170_UNKNOWN_STATE,
|
|
AR9170_STOPPED,
|
|
AR9170_IDLE,
|
|
AR9170_STARTED,
|
|
};
|
|
|
|
struct ar9170_rxstream_mpdu_merge {
|
|
struct ar9170_rx_head plcp;
|
|
bool has_plcp;
|
|
};
|
|
|
|
struct ar9170_tx_queue_stats {
|
|
unsigned int len;
|
|
unsigned int limit;
|
|
unsigned int count;
|
|
};
|
|
|
|
#define AR9170_QUEUE_TIMEOUT 64
|
|
#define AR9170_TX_TIMEOUT 8
|
|
#define AR9170_JANITOR_DELAY 128
|
|
#define AR9170_TX_INVALID_RATE 0xffffffff
|
|
|
|
#define AR9170_NUM_TX_LIMIT_HARD AR9170_TXQ_DEPTH
|
|
#define AR9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH - 10)
|
|
|
|
struct ar9170 {
|
|
struct ieee80211_hw *hw;
|
|
struct ath_common common;
|
|
struct mutex mutex;
|
|
enum ar9170_device_state state;
|
|
bool registered;
|
|
unsigned long bad_hw_nagger;
|
|
|
|
int (*open)(struct ar9170 *);
|
|
void (*stop)(struct ar9170 *);
|
|
int (*tx)(struct ar9170 *, struct sk_buff *);
|
|
int (*exec_cmd)(struct ar9170 *, enum ar9170_cmd, u32 ,
|
|
void *, u32 , void *);
|
|
void (*callback_cmd)(struct ar9170 *, u32 , void *);
|
|
int (*flush)(struct ar9170 *);
|
|
|
|
/* interface mode settings */
|
|
struct ieee80211_vif *vif;
|
|
|
|
/* beaconing */
|
|
struct sk_buff *beacon;
|
|
struct work_struct beacon_work;
|
|
bool enable_beacon;
|
|
|
|
/* 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;
|
|
|
|
/* PHY */
|
|
struct ieee80211_channel *channel;
|
|
int noise[4];
|
|
|
|
/* 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];
|
|
|
|
u8 phy_heavy_clip;
|
|
|
|
#ifdef CONFIG_AR9170_LEDS
|
|
struct delayed_work led_work;
|
|
struct ar9170_led leds[AR9170_NUM_LEDS];
|
|
#endif /* CONFIG_AR9170_LEDS */
|
|
|
|
/* qos queue settings */
|
|
spinlock_t tx_stats_lock;
|
|
struct ar9170_tx_queue_stats tx_stats[5];
|
|
struct ieee80211_tx_queue_params edcf[5];
|
|
|
|
spinlock_t cmdlock;
|
|
__le32 cmdbuf[PAYLOAD_MAX + 1];
|
|
|
|
/* MAC statistics */
|
|
struct ieee80211_low_level_stats stats;
|
|
|
|
/* EEPROM */
|
|
struct ar9170_eeprom eeprom;
|
|
|
|
/* tx queues - as seen by hw - */
|
|
struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
|
|
struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
|
|
struct delayed_work tx_janitor;
|
|
|
|
/* rxstream mpdu merge */
|
|
struct ar9170_rxstream_mpdu_merge rx_mpdu;
|
|
struct sk_buff *rx_failover;
|
|
int rx_failover_missing;
|
|
|
|
/* (cached) HW A-MPDU settings */
|
|
u8 global_ampdu_density;
|
|
u8 global_ampdu_factor;
|
|
};
|
|
|
|
struct ar9170_tx_info {
|
|
unsigned long timeout;
|
|
};
|
|
|
|
#define IS_STARTED(a) (((struct ar9170 *)a)->state >= AR9170_STARTED)
|
|
#define IS_ACCEPTING_CMD(a) (((struct ar9170 *)a)->state >= AR9170_IDLE)
|
|
|
|
/* exported interface */
|
|
void *ar9170_alloc(size_t priv_size);
|
|
int ar9170_register(struct ar9170 *ar, struct device *pdev);
|
|
void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb);
|
|
void ar9170_unregister(struct ar9170 *ar);
|
|
void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
|
|
void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
|
|
int ar9170_nag_limiter(struct ar9170 *ar);
|
|
|
|
/* MAC */
|
|
int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
|
|
int ar9170_init_mac(struct ar9170 *ar);
|
|
int ar9170_set_qos(struct ar9170 *ar);
|
|
int ar9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
|
|
int ar9170_update_frame_filter(struct ar9170 *ar, const u32 filter);
|
|
int ar9170_set_operating_mode(struct ar9170 *ar);
|
|
int ar9170_set_beacon_timers(struct ar9170 *ar);
|
|
int ar9170_set_dyn_sifs_ack(struct ar9170 *ar);
|
|
int ar9170_set_slot_time(struct ar9170 *ar);
|
|
int ar9170_set_basic_rates(struct ar9170 *ar);
|
|
int ar9170_set_hwretry_limit(struct ar9170 *ar, u32 max_retry);
|
|
int ar9170_update_beacon(struct ar9170 *ar);
|
|
void ar9170_new_beacon(struct work_struct *work);
|
|
int ar9170_upload_key(struct ar9170 *ar, u8 id, const u8 *mac, u8 ktype,
|
|
u8 keyidx, u8 *keydata, int keylen);
|
|
int ar9170_disable_key(struct ar9170 *ar, u8 id);
|
|
|
|
/* LEDs */
|
|
#ifdef CONFIG_AR9170_LEDS
|
|
int ar9170_register_leds(struct ar9170 *ar);
|
|
void ar9170_unregister_leds(struct ar9170 *ar);
|
|
#endif /* CONFIG_AR9170_LEDS */
|
|
int ar9170_init_leds(struct ar9170 *ar);
|
|
int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state);
|
|
|
|
/* PHY / RF */
|
|
int ar9170_init_phy(struct ar9170 *ar, enum ieee80211_band band);
|
|
int ar9170_init_rf(struct ar9170 *ar);
|
|
int ar9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
|
|
enum ar9170_rf_init_mode rfi, enum ar9170_bw bw);
|
|
|
|
#endif /* __AR9170_H */
|