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review.trustedfirmware.org / hafnium / third_party / linux.git / 0f672f6c0b52b7b0700b0915c72b540721af4465 / . / include / net / phonet / pep.h
blob: 27b1ab5e4e6d3c37a512ff26b17241f364ed8d6f [file] [log] [blame]
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0-only */
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]2/*
3 * File: pep.h
4 *
5 * Phonet Pipe End Point sockets definitions
6 *
7 * Copyright (C) 2008 Nokia Corporation.
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]8 */
9
10#ifndef NET_PHONET_PEP_H
11#define NET_PHONET_PEP_H
12
13struct pep_sock {
14 struct pn_sock pn_sk;
15
16 /* XXX: union-ify listening vs connected stuff ? */
17 /* Listening socket stuff: */
18 struct hlist_head hlist;
19
20 /* Connected socket stuff: */
21 struct sock *listener;
22 struct sk_buff_head ctrlreq_queue;
23#define PNPIPE_CTRLREQ_MAX 10
24 atomic_t tx_credits;
25 int ifindex;
26 u16 peer_type; /* peer type/subtype */
27 u8 pipe_handle;
28
29 u8 rx_credits;
30 u8 rx_fc; /* RX flow control */
31 u8 tx_fc; /* TX flow control */
32 u8 init_enable; /* auto-enable at creation */
33 u8 aligned;
34};
35
36static inline struct pep_sock *pep_sk(struct sock *sk)
37{
38 return (struct pep_sock *)sk;
39}
40
41extern const struct proto_ops phonet_stream_ops;
42
43/* Pipe protocol definitions */
44struct pnpipehdr {
45 u8 utid; /* transaction ID */
46 u8 message_id;
47 u8 pipe_handle;
48 union {
49 u8 state_after_connect; /* connect request */
50 u8 state_after_reset; /* reset request */
51 u8 error_code; /* any response */
52 u8 pep_type; /* status indication */
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]53 u8 data0; /* anything else */
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]54 };
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]55 u8 data[];
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]56};
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]57#define other_pep_type data[0]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]58
59static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
60{
61 return (struct pnpipehdr *)skb_transport_header(skb);
62}
63
64#define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
65
66enum {
67 PNS_PIPE_CREATE_REQ = 0x00,
68 PNS_PIPE_CREATE_RESP,
69 PNS_PIPE_REMOVE_REQ,
70 PNS_PIPE_REMOVE_RESP,
71
72 PNS_PIPE_DATA = 0x20,
73 PNS_PIPE_ALIGNED_DATA,
74
75 PNS_PEP_CONNECT_REQ = 0x40,
76 PNS_PEP_CONNECT_RESP,
77 PNS_PEP_DISCONNECT_REQ,
78 PNS_PEP_DISCONNECT_RESP,
79 PNS_PEP_RESET_REQ,
80 PNS_PEP_RESET_RESP,
81 PNS_PEP_ENABLE_REQ,
82 PNS_PEP_ENABLE_RESP,
83 PNS_PEP_CTRL_REQ,
84 PNS_PEP_CTRL_RESP,
85 PNS_PEP_DISABLE_REQ = 0x4C,
86 PNS_PEP_DISABLE_RESP,
87
88 PNS_PEP_STATUS_IND = 0x60,
89 PNS_PIPE_CREATED_IND,
90 PNS_PIPE_RESET_IND = 0x63,
91 PNS_PIPE_ENABLED_IND,
92 PNS_PIPE_REDIRECTED_IND,
93 PNS_PIPE_DISABLED_IND = 0x66,
94};
95
96#define PN_PIPE_INVALID_HANDLE 0xff
97#define PN_PEP_TYPE_COMMON 0x00
98
99/* Phonet pipe status indication */
100enum {
101 PN_PEP_IND_FLOW_CONTROL,
102 PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
103};
104
105/* Phonet pipe error codes */
106enum {
107 PN_PIPE_NO_ERROR,
108 PN_PIPE_ERR_INVALID_PARAM,
109 PN_PIPE_ERR_INVALID_HANDLE,
110 PN_PIPE_ERR_INVALID_CTRL_ID,
111 PN_PIPE_ERR_NOT_ALLOWED,
112 PN_PIPE_ERR_PEP_IN_USE,
113 PN_PIPE_ERR_OVERLOAD,
114 PN_PIPE_ERR_DEV_DISCONNECTED,
115 PN_PIPE_ERR_TIMEOUT,
116 PN_PIPE_ERR_ALL_PIPES_IN_USE,
117 PN_PIPE_ERR_GENERAL,
118 PN_PIPE_ERR_NOT_SUPPORTED,
119};
120
121/* Phonet pipe states */
122enum {
123 PN_PIPE_DISABLE,
124 PN_PIPE_ENABLE,
125};
126
127/* Phonet pipe sub-block types */
128enum {
129 PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
130 PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
131 PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
132 PN_PIPE_SB_NEGOTIATED_FC,
133 PN_PIPE_SB_REQUIRED_FC_TX,
134 PN_PIPE_SB_PREFERRED_FC_RX,
135 PN_PIPE_SB_ALIGNED_DATA,
136};
137
138/* Phonet pipe flow control models */
139enum {
140 PN_NO_FLOW_CONTROL,
141 PN_LEGACY_FLOW_CONTROL,
142 PN_ONE_CREDIT_FLOW_CONTROL,
143 PN_MULTI_CREDIT_FLOW_CONTROL,
144 PN_MAX_FLOW_CONTROL,
145};
146
147#define pn_flow_safe(fc) ((fc) >> 1)
148
149/* Phonet pipe flow control states */
150enum {
151 PEP_IND_EMPTY,
152 PEP_IND_BUSY,
153 PEP_IND_READY,
154};
155
156#endif