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 }; 38 /* Flags values */ 39 #define OZ_EI_F_MARKED 0x1 40 41 struct oz_elt_buf { 42 spinlock_t lock; 43 struct list_head stream_list; 44 struct list_head order_list; 45 struct list_head isoc_list; 46 u8 tx_seq_num[OZ_NB_APPS]; 47 }; 48 49 void oz_elt_buf_init(struct oz_elt_buf *buf); 50 void oz_elt_buf_term(struct oz_elt_buf *buf); 51 struct oz_elt_info *oz_elt_info_alloc(struct oz_elt_buf *buf); 52 void oz_elt_info_free(struct oz_elt_buf *buf, struct oz_elt_info *ei); 53 void oz_elt_info_free_chain(struct oz_elt_buf *buf, struct list_head *list); 54 int oz_elt_stream_create(struct oz_elt_buf *buf, u8 id, int max_buf_count); 55 int oz_elt_stream_delete(struct oz_elt_buf *buf, u8 id); 56 void oz_elt_stream_get(struct oz_elt_stream *st); 57 void oz_elt_stream_put(struct oz_elt_stream *st); 58 int oz_queue_elt_info(struct oz_elt_buf *buf, u8 isoc, u8 id, 59 struct oz_elt_info *ei); 60 int oz_select_elts_for_tx(struct oz_elt_buf *buf, u8 isoc, unsigned *len, 61 unsigned max_len, struct list_head *list); 62 int oz_are_elts_available(struct oz_elt_buf *buf); 63 64 #endif /* _OZELTBUF_H */ 65 66