Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / wireless / cw1200 / queue.h

diff --git a/kernel/drivers/net/wireless/cw1200/queue.h b/kernel/drivers/net/wireless/cw1200/queue.h
new file mode 100644 (file)
index 0000000..119f9c7
--- /dev/null
+++ b/kernel/drivers/net/wireless/cw1200/queue.h
@@ -0,0 +1,116 @@
+/*
+ * O(1) TX queue with built-in allocator for ST-Ericsson CW1200 drivers
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef CW1200_QUEUE_H_INCLUDED
+#define CW1200_QUEUE_H_INCLUDED
+
+/* private */ struct cw1200_queue_item;
+
+/* extern */ struct sk_buff;
+/* extern */ struct wsm_tx;
+/* extern */ struct cw1200_common;
+/* extern */ struct ieee80211_tx_queue_stats;
+/* extern */ struct cw1200_txpriv;
+
+/* forward */ struct cw1200_queue_stats;
+
+typedef void (*cw1200_queue_skb_dtor_t)(struct cw1200_common *priv,
+                                       struct sk_buff *skb,
+                                       const struct cw1200_txpriv *txpriv);
+
+struct cw1200_queue {
+       struct cw1200_queue_stats *stats;
+       size_t                  capacity;
+       size_t                  num_queued;
+       size_t                  num_pending;
+       size_t                  num_sent;
+       struct cw1200_queue_item *pool;
+       struct list_head        queue;
+       struct list_head        free_pool;
+       struct list_head        pending;
+       int                     tx_locked_cnt;
+       int                     *link_map_cache;
+       bool                    overfull;
+       spinlock_t              lock; /* Protect queue entry */
+       u8                      queue_id;
+       u8                      generation;
+       struct timer_list       gc;
+       unsigned long           ttl;
+};
+
+struct cw1200_queue_stats {
+       spinlock_t              lock; /* Protect stats entry */
+       int                     *link_map_cache;
+       int                     num_queued;
+       size_t                  map_capacity;
+       wait_queue_head_t       wait_link_id_empty;
+       cw1200_queue_skb_dtor_t skb_dtor;
+       struct cw1200_common    *priv;
+};
+
+struct cw1200_txpriv {
+       u8 link_id;
+       u8 raw_link_id;
+       u8 tid;
+       u8 rate_id;
+       u8 offset;
+};
+
+int cw1200_queue_stats_init(struct cw1200_queue_stats *stats,
+                           size_t map_capacity,
+                           cw1200_queue_skb_dtor_t skb_dtor,
+                           struct cw1200_common *priv);
+int cw1200_queue_init(struct cw1200_queue *queue,
+                     struct cw1200_queue_stats *stats,
+                     u8 queue_id,
+                     size_t capacity,
+                     unsigned long ttl);
+int cw1200_queue_clear(struct cw1200_queue *queue);
+void cw1200_queue_stats_deinit(struct cw1200_queue_stats *stats);
+void cw1200_queue_deinit(struct cw1200_queue *queue);
+
+size_t cw1200_queue_get_num_queued(struct cw1200_queue *queue,
+                                  u32 link_id_map);
+int cw1200_queue_put(struct cw1200_queue *queue,
+                    struct sk_buff *skb,
+                    struct cw1200_txpriv *txpriv);
+int cw1200_queue_get(struct cw1200_queue *queue,
+                    u32 link_id_map,
+                    struct wsm_tx **tx,
+                    struct ieee80211_tx_info **tx_info,
+                    const struct cw1200_txpriv **txpriv);
+int cw1200_queue_requeue(struct cw1200_queue *queue, u32 packet_id);
+int cw1200_queue_requeue_all(struct cw1200_queue *queue);
+int cw1200_queue_remove(struct cw1200_queue *queue,
+                       u32 packet_id);
+int cw1200_queue_get_skb(struct cw1200_queue *queue, u32 packet_id,
+                        struct sk_buff **skb,
+                        const struct cw1200_txpriv **txpriv);
+void cw1200_queue_lock(struct cw1200_queue *queue);
+void cw1200_queue_unlock(struct cw1200_queue *queue);
+bool cw1200_queue_get_xmit_timestamp(struct cw1200_queue *queue,
+                                    unsigned long *timestamp,
+                                    u32 pending_frame_id);
+
+bool cw1200_queue_stats_is_empty(struct cw1200_queue_stats *stats,
+                                u32 link_id_map);
+
+static inline u8 cw1200_queue_get_queue_id(u32 packet_id)
+{
+       return (packet_id >> 16) & 0xFF;
+}
+
+static inline u8 cw1200_queue_get_generation(u32 packet_id)
+{
+       return (packet_id >>  8) & 0xFF;
+}
+
+#endif /* CW1200_QUEUE_H_INCLUDED */