forked from Minki/linux
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
/*
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* Atheros AR9170 driver
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*
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* Driver specific definitions
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*
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, see
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* http://www.gnu.org/licenses/.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* Copyright (c) 2007-2008 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __AR9170_H
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#define __AR9170_H
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#include <linux/completion.h>
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#include <linux/spinlock.h>
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#include <net/cfg80211.h>
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#include <net/mac80211.h>
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#ifdef CONFIG_AR9170_LEDS
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#include <linux/leds.h>
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#endif /* CONFIG_AR9170_LEDS */
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#include "eeprom.h"
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#include "hw.h"
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#include "../regd.h"
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#define PAYLOAD_MAX (AR9170_MAX_CMD_LEN/4 - 1)
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enum ar9170_bw {
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AR9170_BW_20,
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AR9170_BW_40_BELOW,
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AR9170_BW_40_ABOVE,
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__AR9170_NUM_BW,
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};
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static inline enum ar9170_bw nl80211_to_ar9170(enum nl80211_channel_type type)
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{
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switch (type) {
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case NL80211_CHAN_NO_HT:
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case NL80211_CHAN_HT20:
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return AR9170_BW_20;
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case NL80211_CHAN_HT40MINUS:
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return AR9170_BW_40_BELOW;
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case NL80211_CHAN_HT40PLUS:
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return AR9170_BW_40_ABOVE;
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default:
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BUG();
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}
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}
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enum ar9170_rf_init_mode {
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AR9170_RFI_NONE,
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AR9170_RFI_WARM,
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AR9170_RFI_COLD,
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};
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#define AR9170_MAX_RX_BUFFER_SIZE 8192
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#ifdef CONFIG_AR9170_LEDS
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struct ar9170;
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struct ar9170_led {
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struct ar9170 *ar;
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struct led_classdev l;
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char name[32];
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unsigned int toggled;
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bool last_state;
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bool registered;
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};
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#endif /* CONFIG_AR9170_LEDS */
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enum ar9170_device_state {
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AR9170_UNKNOWN_STATE,
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AR9170_STOPPED,
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AR9170_IDLE,
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AR9170_STARTED,
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};
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struct ar9170_rxstream_mpdu_merge {
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struct ar9170_rx_head plcp;
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bool has_plcp;
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};
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struct ar9170_tx_queue_stats {
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unsigned int len;
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unsigned int limit;
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unsigned int count;
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};
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#define AR9170_QUEUE_TIMEOUT 64
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#define AR9170_TX_TIMEOUT 8
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#define AR9170_JANITOR_DELAY 128
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#define AR9170_TX_INVALID_RATE 0xffffffff
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#define AR9170_NUM_TX_LIMIT_HARD AR9170_TXQ_DEPTH
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#define AR9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH - 10)
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struct ar9170 {
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struct ieee80211_hw *hw;
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struct ath_common common;
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struct mutex mutex;
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enum ar9170_device_state state;
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bool registered;
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unsigned long bad_hw_nagger;
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int (*open)(struct ar9170 *);
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void (*stop)(struct ar9170 *);
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int (*tx)(struct ar9170 *, struct sk_buff *);
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int (*exec_cmd)(struct ar9170 *, enum ar9170_cmd, u32 ,
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void *, u32 , void *);
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void (*callback_cmd)(struct ar9170 *, u32 , void *);
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int (*flush)(struct ar9170 *);
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/* interface mode settings */
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struct ieee80211_vif *vif;
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/* beaconing */
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struct sk_buff *beacon;
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struct work_struct beacon_work;
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bool enable_beacon;
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/* cryptographic engine */
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u64 usedkeys;
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bool rx_software_decryption;
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bool disable_offload;
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/* filter settings */
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u64 cur_mc_hash;
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u32 cur_filter;
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unsigned int filter_state;
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bool sniffer_enabled;
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/* PHY */
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struct ieee80211_channel *channel;
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int noise[4];
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/* power calibration data */
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u8 power_5G_leg[4];
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u8 power_2G_cck[4];
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u8 power_2G_ofdm[4];
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u8 power_5G_ht20[8];
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u8 power_5G_ht40[8];
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u8 power_2G_ht20[8];
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u8 power_2G_ht40[8];
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u8 phy_heavy_clip;
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#ifdef CONFIG_AR9170_LEDS
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struct delayed_work led_work;
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struct ar9170_led leds[AR9170_NUM_LEDS];
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#endif /* CONFIG_AR9170_LEDS */
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/* qos queue settings */
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spinlock_t tx_stats_lock;
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struct ar9170_tx_queue_stats tx_stats[5];
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struct ieee80211_tx_queue_params edcf[5];
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spinlock_t cmdlock;
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__le32 cmdbuf[PAYLOAD_MAX + 1];
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/* MAC statistics */
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struct ieee80211_low_level_stats stats;
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/* EEPROM */
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struct ar9170_eeprom eeprom;
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/* tx queues - as seen by hw - */
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struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
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struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
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struct delayed_work tx_janitor;
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/* rxstream mpdu merge */
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struct ar9170_rxstream_mpdu_merge rx_mpdu;
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struct sk_buff *rx_failover;
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int rx_failover_missing;
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/* (cached) HW A-MPDU settings */
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u8 global_ampdu_density;
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u8 global_ampdu_factor;
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};
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struct ar9170_tx_info {
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unsigned long timeout;
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};
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#define IS_STARTED(a) (((struct ar9170 *)a)->state >= AR9170_STARTED)
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#define IS_ACCEPTING_CMD(a) (((struct ar9170 *)a)->state >= AR9170_IDLE)
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/* exported interface */
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void *ar9170_alloc(size_t priv_size);
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int ar9170_register(struct ar9170 *ar, struct device *pdev);
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void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb);
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void ar9170_unregister(struct ar9170 *ar);
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void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
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void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
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int ar9170_nag_limiter(struct ar9170 *ar);
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/* MAC */
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int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
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int ar9170_init_mac(struct ar9170 *ar);
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int ar9170_set_qos(struct ar9170 *ar);
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int ar9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
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int ar9170_update_frame_filter(struct ar9170 *ar, const u32 filter);
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int ar9170_set_operating_mode(struct ar9170 *ar);
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int ar9170_set_beacon_timers(struct ar9170 *ar);
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int ar9170_set_dyn_sifs_ack(struct ar9170 *ar);
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int ar9170_set_slot_time(struct ar9170 *ar);
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int ar9170_set_basic_rates(struct ar9170 *ar);
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int ar9170_set_hwretry_limit(struct ar9170 *ar, u32 max_retry);
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int ar9170_update_beacon(struct ar9170 *ar);
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void ar9170_new_beacon(struct work_struct *work);
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int ar9170_upload_key(struct ar9170 *ar, u8 id, const u8 *mac, u8 ktype,
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u8 keyidx, u8 *keydata, int keylen);
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int ar9170_disable_key(struct ar9170 *ar, u8 id);
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/* LEDs */
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#ifdef CONFIG_AR9170_LEDS
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int ar9170_register_leds(struct ar9170 *ar);
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void ar9170_unregister_leds(struct ar9170 *ar);
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#endif /* CONFIG_AR9170_LEDS */
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int ar9170_init_leds(struct ar9170 *ar);
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int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state);
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/* PHY / RF */
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int ar9170_init_phy(struct ar9170 *ar, enum ieee80211_band band);
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int ar9170_init_rf(struct ar9170 *ar);
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int ar9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
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enum ar9170_rf_init_mode rfi, enum ar9170_bw bw);
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#endif /* __AR9170_H */
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