drivers/staging/ozwpan/ozeltbuf.h

   1 /* -----------------------------------------------------------------------------
   2  * Copyright (c) 2011 Ozmo Inc
   3  * Released under the GNU General Public License Version 2 (GPLv2).
   4  * -----------------------------------------------------------------------------
   5  */
   6 #ifndef _OZELTBUF_H
   7 #define _OZELTBUF_H
   8
   9 #include "ozprotocol.h"
  10
  11 /*-----------------------------------------------------------------------------
  12  */
  13 struct oz_pd;
  14 typedef void (*oz_elt_callback_t)(struct oz_pd *pd, long context);
  15
  16 struct oz_elt_stream {
  17         struct list_head link;
  18         struct list_head elt_list;
  19         atomic_t ref_count;
  20         unsigned buf_count;
  21         unsigned max_buf_count;
  22         u8 frame_number;
  23         u8 id;
  24 };
  25
  26 #define OZ_MAX_ELT_PAYLOAD      255
  27 struct oz_elt_info {
  28         struct list_head link;
  29         struct list_head link_order;
  30         u8 flags;
  31         u8 app_id;
  32         oz_elt_callback_t callback;
  33         long context;
  34         struct oz_elt_stream *stream;
  35         u8 data[sizeof(struct oz_elt) + OZ_MAX_ELT_PAYLOAD];
  36         int length;
  37         unsigned magic;
  38 };
  39 /* Flags values */
  40 #define OZ_EI_F_MARKED          0x1
  41
  42 struct oz_elt_buf {
  43         spinlock_t lock;
  44         struct list_head stream_list;
  45         struct list_head order_list;
  46         struct list_head isoc_list;
  47         struct list_head *elt_pool;
  48         int free_elts;
  49         int max_free_elts;
  50         u8 tx_seq_num[OZ_NB_APPS];
  51 };
  52
  53 int oz_elt_buf_init(struct oz_elt_buf *buf);
  54 void oz_elt_buf_term(struct oz_elt_buf *buf);
  55 struct oz_elt_info *oz_elt_info_alloc(struct oz_elt_buf *buf);
  56 void oz_elt_info_free(struct oz_elt_buf *buf, struct oz_elt_info *ei);
  57 void oz_elt_info_free_chain(struct oz_elt_buf *buf, struct list_head *list);
  58 int oz_elt_stream_create(struct oz_elt_buf *buf, u8 id, int max_buf_count);
  59 int oz_elt_stream_delete(struct oz_elt_buf *buf, u8 id);
  60 void oz_elt_stream_get(struct oz_elt_stream *st);
  61 void oz_elt_stream_put(struct oz_elt_stream *st);
  62 int oz_queue_elt_info(struct oz_elt_buf *buf, u8 isoc, u8 id,
  63                 struct oz_elt_info *ei);
  64 int oz_select_elts_for_tx(struct oz_elt_buf *buf, u8 isoc, unsigned *len,
  65                 unsigned max_len, struct list_head *list);
  66 int oz_are_elts_available(struct oz_elt_buf *buf);
  67 void oz_trim_elt_pool(struct oz_elt_buf *buf);
  68
  69 #endif /* _OZELTBUF_H */
  70