117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
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/*
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* O(1) TX queue with built-in allocator for ST-Ericsson CW1200 drivers
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*
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* Copyright (c) 2010, ST-Ericsson
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* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef CW1200_QUEUE_H_INCLUDED
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#define CW1200_QUEUE_H_INCLUDED
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/* private */ struct cw1200_queue_item;
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/* extern */ struct sk_buff;
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/* extern */ struct wsm_tx;
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/* extern */ struct cw1200_common;
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/* extern */ struct ieee80211_tx_queue_stats;
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/* extern */ struct cw1200_txpriv;
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/* forward */ struct cw1200_queue_stats;
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typedef void (*cw1200_queue_skb_dtor_t)(struct cw1200_common *priv,
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struct sk_buff *skb,
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const struct cw1200_txpriv *txpriv);
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struct cw1200_queue {
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struct cw1200_queue_stats *stats;
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size_t capacity;
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size_t num_queued;
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size_t num_pending;
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size_t num_sent;
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struct cw1200_queue_item *pool;
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struct list_head queue;
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struct list_head free_pool;
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struct list_head pending;
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int tx_locked_cnt;
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int *link_map_cache;
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bool overfull;
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spinlock_t lock; /* Protect queue entry */
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u8 queue_id;
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u8 generation;
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struct timer_list gc;
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unsigned long ttl;
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};
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struct cw1200_queue_stats {
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spinlock_t lock; /* Protect stats entry */
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int *link_map_cache;
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int num_queued;
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size_t map_capacity;
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wait_queue_head_t wait_link_id_empty;
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cw1200_queue_skb_dtor_t skb_dtor;
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struct cw1200_common *priv;
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};
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struct cw1200_txpriv {
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u8 link_id;
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u8 raw_link_id;
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u8 tid;
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u8 rate_id;
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u8 offset;
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};
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int cw1200_queue_stats_init(struct cw1200_queue_stats *stats,
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size_t map_capacity,
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cw1200_queue_skb_dtor_t skb_dtor,
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struct cw1200_common *priv);
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int cw1200_queue_init(struct cw1200_queue *queue,
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struct cw1200_queue_stats *stats,
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u8 queue_id,
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size_t capacity,
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unsigned long ttl);
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int cw1200_queue_clear(struct cw1200_queue *queue);
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void cw1200_queue_stats_deinit(struct cw1200_queue_stats *stats);
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void cw1200_queue_deinit(struct cw1200_queue *queue);
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size_t cw1200_queue_get_num_queued(struct cw1200_queue *queue,
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u32 link_id_map);
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int cw1200_queue_put(struct cw1200_queue *queue,
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struct sk_buff *skb,
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struct cw1200_txpriv *txpriv);
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int cw1200_queue_get(struct cw1200_queue *queue,
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u32 link_id_map,
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struct wsm_tx **tx,
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struct ieee80211_tx_info **tx_info,
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const struct cw1200_txpriv **txpriv);
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int cw1200_queue_requeue(struct cw1200_queue *queue, u32 packet_id);
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int cw1200_queue_requeue_all(struct cw1200_queue *queue);
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int cw1200_queue_remove(struct cw1200_queue *queue,
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u32 packet_id);
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int cw1200_queue_get_skb(struct cw1200_queue *queue, u32 packet_id,
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struct sk_buff **skb,
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const struct cw1200_txpriv **txpriv);
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void cw1200_queue_lock(struct cw1200_queue *queue);
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void cw1200_queue_unlock(struct cw1200_queue *queue);
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bool cw1200_queue_get_xmit_timestamp(struct cw1200_queue *queue,
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unsigned long *timestamp,
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u32 pending_frame_id);
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bool cw1200_queue_stats_is_empty(struct cw1200_queue_stats *stats,
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u32 link_id_map);
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static inline u8 cw1200_queue_get_queue_id(u32 packet_id)
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{
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return (packet_id >> 16) & 0xFF;
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}
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static inline u8 cw1200_queue_get_generation(u32 packet_id)
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{
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return (packet_id >> 8) & 0xFF;
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}
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#endif /* CW1200_QUEUE_H_INCLUDED */
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