xref: /linux/drivers/net/fddi/skfp/h/sba.h (revision 75bf465f0bc33e9b776a46d6a1b9b990f5fb7c37)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /******************************************************************************
3  *
4  *	(C)Copyright 1998,1999 SysKonnect,
5  *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
6  *
7  *	The information in this file is provided "AS IS" without warranty.
8  *
9  ******************************************************************************/
10 
11 /*
12  * Synchronous Bandwidth Allocation (SBA) structs
13  */
14 
15 #ifndef _SBA_
16 #define _SBA_
17 
18 #include "mbuf.h"
19 #include "sba_def.h"
20 
21 #ifdef	SBA
22 
23 /* Timer Cell Template */
24 struct timer_cell {
25 	struct timer_cell	*next_ptr ;
26 	struct timer_cell	*prev_ptr ;
27 	u_long			start_time ;
28 	struct s_sba_node_vars	*node_var ;
29 } ;
30 
31 /*
32  * Node variables
33  */
34 struct s_sba_node_vars {
35 	u_char			change_resp_flag ;
36 	u_char			report_resp_flag ;
37 	u_char			change_req_flag ;
38 	u_char			report_req_flag ;
39 	long			change_amount ;
40 	long			node_overhead ;
41 	long			node_payload ;
42 	u_long			node_status ;
43 	u_char			deallocate_status ;
44 	u_char			timer_state ;
45 	u_short			report_cnt ;
46 	long			lastrep_req_tranid ;
47 	struct fddi_addr	mac_address ;
48 	struct s_sba_sessions 	*node_sessions ;
49 	struct timer_cell	timer ;
50 } ;
51 
52 /*
53  * Session variables
54  */
55 struct s_sba_sessions {
56 	u_long			deallocate_status ;
57 	long			session_overhead ;
58 	u_long			min_segment_size ;
59 	long			session_payload ;
60 	u_long			session_status ;
61 	u_long			sba_category ;
62 	long			lastchg_req_tranid ;
63 	u_short			session_id ;
64 	u_char			class ;
65 	u_char			fddi2 ;
66 	u_long			max_t_neg ;
67 	struct s_sba_sessions	*next_session ;
68 } ;
69 
70 struct s_sba {
71 
72 	struct s_sba_node_vars	node[MAX_NODES] ;
73 	struct s_sba_sessions	session[MAX_SESSIONS] ;
74 
75 	struct s_sba_sessions	*free_session ;	/* points to the first */
76 						/* free session */
77 
78 	struct timer_cell	*tail_timer ;	/* points to the last timer cell */
79 
80 	/*
81 	 * variables for allocation actions
82 	 */
83 	long	total_payload ;		/* Total Payload */
84 	long	total_overhead ;	/* Total Overhead */
85 	long	sba_allocatable ;	/* allocatable sync bandwidth */
86 
87 	/*
88 	 * RAF message receive parameters
89 	 */
90 	long		msg_path_index ;	/* Path Type */
91 	long		msg_sba_pl_req ;	/* Payload Request */
92 	long		msg_sba_ov_req ;	/* Overhead Request */
93 	long		msg_mib_pl ;		/* Current Payload for this Path */
94 	long		msg_mib_ov ;		/* Current Overhead for this Path*/
95 	long		msg_category ;		/* Category of the Allocation */
96 	u_long		msg_max_t_neg ;		/* longest T_Neg acceptable */
97 	u_long		msg_min_seg_siz ;	/* minimum segement size */
98 	struct smt_header	*sm ;		/* points to the rec message */
99 	struct fddi_addr	*msg_alloc_addr ;	/* Allocation Address */
100 
101 	/*
102 	 * SBA variables
103 	 */
104 	u_long	sba_t_neg ;		/* holds the last T_NEG */
105 	long	sba_max_alloc ;		/* the parsed value of SBAAvailable */
106 
107 	/*
108 	 * SBA state machine variables
109 	 */
110 	short	sba_next_state ;	/* the next state of the SBA */
111 	char	sba_command ;		/* holds the execuded SBA cmd */
112 	u_char	sba_available ;		/* parsed value after possible check */
113 } ;
114 
115 #endif	/* SBA */
116 
117 	/*
118 	 * variables for the End Station Support
119 	 */
120 struct s_ess {
121 
122 	/*
123 	 * flags and counters
124 	 */
125 	u_char	sync_bw_available ;	/* is set if sync bw is allocated */
126 	u_char	local_sba_active ;	/* set when a local sba is available */
127 	char	raf_act_timer_poll ;	/* activate the timer to send allc req */
128 	char	timer_count ;		/* counts every timer function call */
129 
130 	SMbuf	*sba_reply_pend ;	/* local reply for the sba is pending */
131 
132 	/*
133 	 * variables for the ess bandwidth control
134 	 */
135 	long	sync_bw ;		/* holds the allocaed sync bw */
136 	u_long	alloc_trans_id ;	/* trans id of the last alloc req */
137 } ;
138 #endif
139