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gerrit-public.fairphone.software / kernel / msm-4.9 / 5a9821321e0a61674fd5c4b5a9e95007d0e7e052 / . / drivers / net / wireless / cw1200 / queue.h
blob: 119f9c79c14e757342454c7720cf9a8aab6d6763 [file] [log] [blame]
Solomon Peachya910e4a2013-05-24 20:04:38 -0400[diff] [blame]1/*
2 * O(1) TX queue with built-in allocator for ST-Ericsson CW1200 drivers
3 *
4 * Copyright (c) 2010, ST-Ericsson
5 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#ifndef CW1200_QUEUE_H_INCLUDED
13#define CW1200_QUEUE_H_INCLUDED
14
15/* private */ struct cw1200_queue_item;
16
17/* extern */ struct sk_buff;
18/* extern */ struct wsm_tx;
19/* extern */ struct cw1200_common;
20/* extern */ struct ieee80211_tx_queue_stats;
21/* extern */ struct cw1200_txpriv;
22
23/* forward */ struct cw1200_queue_stats;
24
25typedef void (*cw1200_queue_skb_dtor_t)(struct cw1200_common *priv,
26 struct sk_buff *skb,
27 const struct cw1200_txpriv *txpriv);
28
29struct cw1200_queue {
30 struct cw1200_queue_stats *stats;
31 size_t capacity;
32 size_t num_queued;
33 size_t num_pending;
34 size_t num_sent;
35 struct cw1200_queue_item *pool;
36 struct list_head queue;
37 struct list_head free_pool;
38 struct list_head pending;
39 int tx_locked_cnt;
40 int *link_map_cache;
41 bool overfull;
42 spinlock_t lock; /* Protect queue entry */
43 u8 queue_id;
44 u8 generation;
45 struct timer_list gc;
46 unsigned long ttl;
47};
48
49struct cw1200_queue_stats {
50 spinlock_t lock; /* Protect stats entry */
51 int *link_map_cache;
52 int num_queued;
53 size_t map_capacity;
54 wait_queue_head_t wait_link_id_empty;
55 cw1200_queue_skb_dtor_t skb_dtor;
56 struct cw1200_common *priv;
57};
58
59struct cw1200_txpriv {
60 u8 link_id;
61 u8 raw_link_id;
62 u8 tid;
63 u8 rate_id;
64 u8 offset;
65};
66
67int cw1200_queue_stats_init(struct cw1200_queue_stats *stats,
68 size_t map_capacity,
69 cw1200_queue_skb_dtor_t skb_dtor,
70 struct cw1200_common *priv);
71int cw1200_queue_init(struct cw1200_queue *queue,
72 struct cw1200_queue_stats *stats,
73 u8 queue_id,
74 size_t capacity,
75 unsigned long ttl);
76int cw1200_queue_clear(struct cw1200_queue *queue);
77void cw1200_queue_stats_deinit(struct cw1200_queue_stats *stats);
78void cw1200_queue_deinit(struct cw1200_queue *queue);
79
80size_t cw1200_queue_get_num_queued(struct cw1200_queue *queue,
81 u32 link_id_map);
82int cw1200_queue_put(struct cw1200_queue *queue,
83 struct sk_buff *skb,
84 struct cw1200_txpriv *txpriv);
85int cw1200_queue_get(struct cw1200_queue *queue,
86 u32 link_id_map,
87 struct wsm_tx **tx,
88 struct ieee80211_tx_info **tx_info,
89 const struct cw1200_txpriv **txpriv);
90int cw1200_queue_requeue(struct cw1200_queue *queue, u32 packet_id);
91int cw1200_queue_requeue_all(struct cw1200_queue *queue);
92int cw1200_queue_remove(struct cw1200_queue *queue,
93 u32 packet_id);
94int cw1200_queue_get_skb(struct cw1200_queue *queue, u32 packet_id,
95 struct sk_buff **skb,
96 const struct cw1200_txpriv **txpriv);
97void cw1200_queue_lock(struct cw1200_queue *queue);
98void cw1200_queue_unlock(struct cw1200_queue *queue);
99bool cw1200_queue_get_xmit_timestamp(struct cw1200_queue *queue,
100 unsigned long *timestamp,
101 u32 pending_frame_id);
102
103bool cw1200_queue_stats_is_empty(struct cw1200_queue_stats *stats,
104 u32 link_id_map);
105
106static inline u8 cw1200_queue_get_queue_id(u32 packet_id)
107{
108 return (packet_id >> 16) & 0xFF;
109}
110
111static inline u8 cw1200_queue_get_generation(u32 packet_id)
112{
113 return (packet_id >> 8) & 0xFF;
114}
115
116#endif /* CW1200_QUEUE_H_INCLUDED */