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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / atm / lec.h
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1 /*
2 * Lan Emulation client header file
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
7 #ifndef _LEC_H_
8 #define _LEC_H_
10 #include <linux/atmdev.h>
11 #include <linux/netdevice.h>
12 #include <linux/atmlec.h>
14 #define LEC_HEADER_LEN 16
16 struct lecdatahdr_8023 {
17 __be16 le_header;
18 unsigned char h_dest[ETH_ALEN];
19 unsigned char h_source[ETH_ALEN];
20 __be16 h_type;
23 struct lecdatahdr_8025 {
24 __be16 le_header;
25 unsigned char ac_pad;
26 unsigned char fc;
27 unsigned char h_dest[ETH_ALEN];
28 unsigned char h_source[ETH_ALEN];
31 #define LEC_MINIMUM_8023_SIZE 62
32 #define LEC_MINIMUM_8025_SIZE 16
35 * Operations that LANE2 capable device can do. Two first functions
36 * are used to make the device do things. See spec 3.1.3 and 3.1.4.
38 * The third function is intended for the MPOA component sitting on
39 * top of the LANE device. The MPOA component assigns it's own function
40 * to (*associate_indicator)() and the LANE device will use that
41 * function to tell about TLVs it sees floating through.
44 struct lane2_ops {
45 int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force,
46 u8 **tlvs, u32 *sizeoftlvs);
47 int (*associate_req) (struct net_device *dev, const u8 *lan_dst,
48 const u8 *tlvs, u32 sizeoftlvs);
49 void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr,
50 const u8 *tlvs, u32 sizeoftlvs);
54 * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType
55 * frames.
57 * 1. Dix Ethernet EtherType frames encoded by placing EtherType
58 * field in h_type field. Data follows immediatelly after header.
59 * 2. LLC Data frames whose total length, including LLC field and data,
60 * but not padding required to meet the minimum data frame length,
61 * is less than 1536(0x0600) MUST be encoded by placing that length
62 * in the h_type field. The LLC field follows header immediatelly.
63 * 3. LLC data frames longer than this maximum MUST be encoded by placing
64 * the value 0 in the h_type field.
68 /* Hash table size */
69 #define LEC_ARP_TABLE_SIZE 16
71 struct lec_priv {
72 unsigned short lecid; /* Lecid of this client */
73 struct hlist_head lec_arp_empty_ones;
74 /* Used for storing VCC's that don't have a MAC address attached yet */
75 struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE];
76 /* Actual LE ARP table */
77 struct hlist_head lec_no_forward;
79 * Used for storing VCC's (and forward packets from) which are to
80 * age out by not using them to forward packets.
81 * This is because to some LE clients there will be 2 VCCs. Only
82 * one of them gets used.
84 struct hlist_head mcast_fwds;
86 * With LANEv2 it is possible that BUS (or a special multicast server)
87 * establishes multiple Multicast Forward VCCs to us. This list
88 * collects all those VCCs. LANEv1 client has only one item in this
89 * list. These entries are not aged out.
91 spinlock_t lec_arp_lock;
92 struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
93 struct atm_vcc *lecd;
94 struct delayed_work lec_arp_work; /* C10 */
95 unsigned int maximum_unknown_frame_count;
97 * Within the period of time defined by this variable, the client will send
98 * no more than C10 frames to BUS for a given unicast destination. (C11)
100 unsigned long max_unknown_frame_time;
102 * If no traffic has been sent in this vcc for this period of time,
103 * vcc will be torn down (C12)
105 unsigned long vcc_timeout_period;
107 * An LE Client MUST not retry an LE_ARP_REQUEST for a
108 * given frame's LAN Destination more than maximum retry count times,
109 * after the first LEC_ARP_REQUEST (C13)
111 unsigned short max_retry_count;
113 * Max time the client will maintain an entry in its arp cache in
114 * absence of a verification of that relationship (C17)
116 unsigned long aging_time;
118 * Max time the client will maintain an entry in cache when
119 * topology change flag is true (C18)
121 unsigned long forward_delay_time; /* Topology change flag (C19) */
122 int topology_change;
124 * Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE
125 * cycle to take (C20)
127 unsigned long arp_response_time;
129 * Time limit ot wait to receive an LE_FLUSH_RESPONSE after the
130 * LE_FLUSH_REQUEST has been sent before taking recover action. (C21)
132 unsigned long flush_timeout;
133 /* The time since sending a frame to the bus after which the
134 * LE Client may assume that the frame has been either discarded or
135 * delivered to the recipient (C22)
137 unsigned long path_switching_delay;
139 u8 *tlvs; /* LANE2: TLVs are new */
140 u32 sizeoftlvs; /* The size of the tlv array in bytes */
141 int lane_version; /* LANE2 */
142 int itfnum; /* e.g. 2 for lec2, 5 for lec5 */
143 struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */
144 int is_proxy; /* bridge between ATM and Ethernet */
145 int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */
148 struct lec_vcc_priv {
149 void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb);
150 int xoff;
153 #define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back))
155 #endif /* _LEC_H_ */