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diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.h b/drivers/infiniband/hw/cxgb3/iwch_cm.h
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1/*
2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
3 * Copyright (c) 2006 Open Grid Computing, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33#ifndef _IWCH_CM_H_
34#define _IWCH_CM_H_
35
36#include <linux/inet.h>
37#include <linux/wait.h>
38#include <linux/spinlock.h>
39#include <linux/kref.h>
40
41#include <rdma/ib_verbs.h>
42#include <rdma/iw_cm.h>
43
44#include "cxgb3_offload.h"
45#include "iwch_provider.h"
46
47#define MPA_KEY_REQ "MPA ID Req Frame"
48#define MPA_KEY_REP "MPA ID Rep Frame"
49
50#define MPA_MAX_PRIVATE_DATA 256
51#define MPA_REV 0 /* XXX - amso1100 uses rev 0 ! */
52#define MPA_REJECT 0x20
53#define MPA_CRC 0x40
54#define MPA_MARKERS 0x80
55#define MPA_FLAGS_MASK 0xE0
56
57#define put_ep(ep) { \
58 PDBG("put_ep (via %s:%u) ep %p refcnt %d\n", __FUNCTION__, __LINE__, \
59 ep, atomic_read(&((ep)->kref.refcount))); \
60 kref_put(&((ep)->kref), __free_ep); \
61}
62
63#define get_ep(ep) { \
64 PDBG("get_ep (via %s:%u) ep %p, refcnt %d\n", __FUNCTION__, __LINE__, \
65 ep, atomic_read(&((ep)->kref.refcount))); \
66 kref_get(&((ep)->kref)); \
67}
68
69struct mpa_message {
70 u8 key[16];
71 u8 flags;
72 u8 revision;
73 __be16 private_data_size;
74 u8 private_data[0];
75};
76
77struct terminate_message {
78 u8 layer_etype;
79 u8 ecode;
80 __be16 hdrct_rsvd;
81 u8 len_hdrs[0];
82};
83
84#define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
85
86enum iwch_layers_types {
87 LAYER_RDMAP = 0x00,
88 LAYER_DDP = 0x10,
89 LAYER_MPA = 0x20,
90 RDMAP_LOCAL_CATA = 0x00,
91 RDMAP_REMOTE_PROT = 0x01,
92 RDMAP_REMOTE_OP = 0x02,
93 DDP_LOCAL_CATA = 0x00,
94 DDP_TAGGED_ERR = 0x01,
95 DDP_UNTAGGED_ERR = 0x02,
96 DDP_LLP = 0x03
97};
98
99enum iwch_rdma_ecodes {
100 RDMAP_INV_STAG = 0x00,
101 RDMAP_BASE_BOUNDS = 0x01,
102 RDMAP_ACC_VIOL = 0x02,
103 RDMAP_STAG_NOT_ASSOC = 0x03,
104 RDMAP_TO_WRAP = 0x04,
105 RDMAP_INV_VERS = 0x05,
106 RDMAP_INV_OPCODE = 0x06,
107 RDMAP_STREAM_CATA = 0x07,
108 RDMAP_GLOBAL_CATA = 0x08,
109 RDMAP_CANT_INV_STAG = 0x09,
110 RDMAP_UNSPECIFIED = 0xff
111};
112
113enum iwch_ddp_ecodes {
114 DDPT_INV_STAG = 0x00,
115 DDPT_BASE_BOUNDS = 0x01,
116 DDPT_STAG_NOT_ASSOC = 0x02,
117 DDPT_TO_WRAP = 0x03,
118 DDPT_INV_VERS = 0x04,
119 DDPU_INV_QN = 0x01,
120 DDPU_INV_MSN_NOBUF = 0x02,
121 DDPU_INV_MSN_RANGE = 0x03,
122 DDPU_INV_MO = 0x04,
123 DDPU_MSG_TOOBIG = 0x05,
124 DDPU_INV_VERS = 0x06
125};
126
127enum iwch_mpa_ecodes {
128 MPA_CRC_ERR = 0x02,
129 MPA_MARKER_ERR = 0x03
130};
131
132enum iwch_ep_state {
133 IDLE = 0,
134 LISTEN,
135 CONNECTING,
136 MPA_REQ_WAIT,
137 MPA_REQ_SENT,
138 MPA_REQ_RCVD,
139 MPA_REP_SENT,
140 FPDU_MODE,
141 ABORTING,
142 CLOSING,
143 MORIBUND,
144 DEAD,
145};
146
147struct iwch_ep_common {
148 struct iw_cm_id *cm_id;
149 struct iwch_qp *qp;
150 struct t3cdev *tdev;
151 enum iwch_ep_state state;
152 struct kref kref;
153 spinlock_t lock;
154 struct sockaddr_in local_addr;
155 struct sockaddr_in remote_addr;
156 wait_queue_head_t waitq;
157 int rpl_done;
158 int rpl_err;
159};
160
161struct iwch_listen_ep {
162 struct iwch_ep_common com;
163 unsigned int stid;
164 int backlog;
165};
166
167struct iwch_ep {
168 struct iwch_ep_common com;
169 struct iwch_ep *parent_ep;
170 struct timer_list timer;
171 unsigned int atid;
172 u32 hwtid;
173 u32 snd_seq;
174 struct l2t_entry *l2t;
175 struct dst_entry *dst;
176 struct sk_buff *mpa_skb;
177 struct iwch_mpa_attributes mpa_attr;
178 unsigned int mpa_pkt_len;
179 u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
180 u8 tos;
181 u16 emss;
182 u16 plen;
183 u32 ird;
184 u32 ord;
185};
186
187static inline struct iwch_ep *to_ep(struct iw_cm_id *cm_id)
188{
189 return cm_id->provider_data;
190}
191
192static inline struct iwch_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
193{
194 return cm_id->provider_data;
195}
196
197static inline int compute_wscale(int win)
198{
199 int wscale = 0;
200
201 while (wscale < 14 && (65535<<wscale) < win)
202 wscale++;
203 return wscale;
204}
205
206/* CM prototypes */
207
208int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
209int iwch_create_listen(struct iw_cm_id *cm_id, int backlog);
210int iwch_destroy_listen(struct iw_cm_id *cm_id);
211int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
212int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
213int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp);
214int iwch_quiesce_tid(struct iwch_ep *ep);
215int iwch_resume_tid(struct iwch_ep *ep);
216void __free_ep(struct kref *kref);
217void iwch_rearp(struct iwch_ep *ep);
218int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t);
219
220int __init iwch_cm_init(void);
221void __exit iwch_cm_term(void);
222
223#endif /* _IWCH_CM_H_ */
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