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Glenn Streiff3c2d7742008-02-04 20:20:45 -08001/*
2 * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#ifndef NES_CM_H
35#define NES_CM_H
36
37#define QUEUE_EVENTS
38
39#define NES_MANAGE_APBVT_DEL 0
40#define NES_MANAGE_APBVT_ADD 1
41
42/* IETF MPA -- defines, enums, structs */
43#define IEFT_MPA_KEY_REQ "MPA ID Req Frame"
44#define IEFT_MPA_KEY_REP "MPA ID Rep Frame"
45#define IETF_MPA_KEY_SIZE 16
46#define IETF_MPA_VERSION 1
47
48enum ietf_mpa_flags {
49 IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */
50 IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */
51 IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */
52};
53
54struct ietf_mpa_frame {
55 u8 key[IETF_MPA_KEY_SIZE];
56 u8 flags;
57 u8 rev;
58 __be16 priv_data_len;
59 u8 priv_data[0];
60};
61
62#define ietf_mpa_req_resp_frame ietf_mpa_frame
63
64struct nes_v4_quad {
65 u32 rsvd0;
66 __le32 DstIpAdrIndex; /* Only most significant 5 bits are valid */
67 __be32 SrcIpadr;
68 __be16 TcpPorts[2]; /* src is low, dest is high */
69};
70
71struct nes_cm_node;
72enum nes_timer_type {
73 NES_TIMER_TYPE_SEND,
74 NES_TIMER_TYPE_RECV,
75 NES_TIMER_NODE_CLEANUP,
76 NES_TIMER_TYPE_CLOSE,
77};
78
Faisal Latif183ecfa2008-11-21 20:50:46 -060079#define NES_PASSIVE_STATE_INDICATED 0
80#define NES_DO_NOT_SEND_RESET_EVENT 1
81#define NES_SEND_RESET_EVENT 2
82
Glenn Streiff3c2d7742008-02-04 20:20:45 -080083#define MAX_NES_IFS 4
84
85#define SET_ACK 1
86#define SET_SYN 2
87#define SET_FIN 4
88#define SET_RST 8
89
Faisal Latif6492cdf2008-07-24 20:50:45 -070090#define TCP_OPTIONS_PADDING 3
91
Glenn Streiff3c2d7742008-02-04 20:20:45 -080092struct option_base {
93 u8 optionnum;
94 u8 length;
95};
96
97enum option_numbers {
98 OPTION_NUMBER_END,
99 OPTION_NUMBER_NONE,
100 OPTION_NUMBER_MSS,
101 OPTION_NUMBER_WINDOW_SCALE,
102 OPTION_NUMBER_SACK_PERM,
103 OPTION_NUMBER_SACK,
104 OPTION_NUMBER_WRITE0 = 0xbc
105};
106
107struct option_mss {
108 u8 optionnum;
109 u8 length;
110 __be16 mss;
111};
112
113struct option_windowscale {
114 u8 optionnum;
115 u8 length;
116 u8 shiftcount;
117};
118
119union all_known_options {
120 char as_end;
121 struct option_base as_base;
122 struct option_mss as_mss;
123 struct option_windowscale as_windowscale;
124};
125
126struct nes_timer_entry {
127 struct list_head list;
128 unsigned long timetosend; /* jiffies */
129 struct sk_buff *skb;
130 u32 type;
131 u32 retrycount;
132 u32 retranscount;
133 u32 context;
134 u32 seq_num;
135 u32 send_retrans;
136 int close_when_complete;
137 struct net_device *netdev;
138};
139
140#define NES_DEFAULT_RETRYS 64
141#define NES_DEFAULT_RETRANS 8
142#ifdef CONFIG_INFINIBAND_NES_DEBUG
143#define NES_RETRY_TIMEOUT (1000*HZ/1000)
144#else
145#define NES_RETRY_TIMEOUT (3000*HZ/1000)
146#endif
147#define NES_SHORT_TIME (10)
148#define NES_LONG_TIME (2000*HZ/1000)
149
150#define NES_CM_HASHTABLE_SIZE 1024
151#define NES_CM_TCP_TIMER_INTERVAL 3000
152#define NES_CM_DEFAULT_MTU 1540
153#define NES_CM_DEFAULT_FRAME_CNT 10
154#define NES_CM_THREAD_STACK_SIZE 256
155#define NES_CM_DEFAULT_RCV_WND 64240 // before we know that window scaling is allowed
156#define NES_CM_DEFAULT_RCV_WND_SCALED 256960 // after we know that window scaling is allowed
157#define NES_CM_DEFAULT_RCV_WND_SCALE 2
158#define NES_CM_DEFAULT_FREE_PKTS 0x000A
159#define NES_CM_FREE_PKT_LO_WATERMARK 2
160
161#define NES_CM_DEFAULT_MSS 536
162
163#define NES_CM_DEF_SEQ 0x159bf75f
164#define NES_CM_DEF_LOCAL_ID 0x3b47
165
166#define NES_CM_DEF_SEQ2 0x18ed5740
167#define NES_CM_DEF_LOCAL_ID2 0xb807
Faisal Latife1890622008-12-24 20:30:04 -0800168#define MAX_CM_BUFFER 512
169
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800170
171typedef u32 nes_addr_t;
172
173#define nes_cm_tsa_context nes_qp_context
174
175struct nes_qp;
176
177/* cm node transition states */
178enum nes_cm_node_state {
179 NES_CM_STATE_UNKNOWN,
180 NES_CM_STATE_INITED,
181 NES_CM_STATE_LISTENING,
182 NES_CM_STATE_SYN_RCVD,
183 NES_CM_STATE_SYN_SENT,
184 NES_CM_STATE_ONE_SIDE_ESTABLISHED,
185 NES_CM_STATE_ESTABLISHED,
186 NES_CM_STATE_ACCEPTING,
187 NES_CM_STATE_MPAREQ_SENT,
Faisal Latif6492cdf2008-07-24 20:50:45 -0700188 NES_CM_STATE_MPAREQ_RCVD,
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800189 NES_CM_STATE_TSA,
190 NES_CM_STATE_FIN_WAIT1,
191 NES_CM_STATE_FIN_WAIT2,
192 NES_CM_STATE_CLOSE_WAIT,
193 NES_CM_STATE_TIME_WAIT,
194 NES_CM_STATE_LAST_ACK,
195 NES_CM_STATE_CLOSING,
196 NES_CM_STATE_CLOSED
197};
198
Faisal Latif6492cdf2008-07-24 20:50:45 -0700199enum nes_tcpip_pkt_type {
200 NES_PKT_TYPE_UNKNOWN,
201 NES_PKT_TYPE_SYN,
202 NES_PKT_TYPE_SYNACK,
203 NES_PKT_TYPE_ACK,
204 NES_PKT_TYPE_FIN,
205 NES_PKT_TYPE_RST
206};
207
208
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800209/* type of nes connection */
210enum nes_cm_conn_type {
211 NES_CM_IWARP_CONN_TYPE,
212};
213
214/* CM context params */
215struct nes_cm_tcp_context {
216 u8 client;
217
218 u32 loc_seq_num;
219 u32 loc_ack_num;
220 u32 rem_ack_num;
221 u32 rcv_nxt;
222
223 u32 loc_id;
224 u32 rem_id;
225
226 u32 snd_wnd;
227 u32 max_snd_wnd;
228
229 u32 rcv_wnd;
230 u32 mss;
231 u8 snd_wscale;
232 u8 rcv_wscale;
233
234 struct nes_cm_tsa_context tsa_cntxt;
235 struct timeval sent_ts;
236};
237
238
239enum nes_cm_listener_state {
240 NES_CM_LISTENER_PASSIVE_STATE=1,
241 NES_CM_LISTENER_ACTIVE_STATE=2,
242 NES_CM_LISTENER_EITHER_STATE=3
243};
244
245struct nes_cm_listener {
246 struct list_head list;
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800247 struct nes_cm_core *cm_core;
248 u8 loc_mac[ETH_ALEN];
249 nes_addr_t loc_addr;
250 u16 loc_port;
251 struct iw_cm_id *cm_id;
252 enum nes_cm_conn_type conn_type;
253 atomic_t ref_count;
254 struct nes_vnic *nesvnic;
255 atomic_t pend_accepts_cnt;
256 int backlog;
257 enum nes_cm_listener_state listener_state;
258 u32 reused_node;
259};
260
261/* per connection node and node state information */
262struct nes_cm_node {
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800263 nes_addr_t loc_addr, rem_addr;
264 u16 loc_port, rem_port;
265
266 u8 loc_mac[ETH_ALEN];
267 u8 rem_mac[ETH_ALEN];
268
269 enum nes_cm_node_state state;
270 struct nes_cm_tcp_context tcp_cntxt;
271 struct nes_cm_core *cm_core;
272 struct sk_buff_head resend_list;
273 atomic_t ref_count;
274 struct net_device *netdev;
275
276 struct nes_cm_node *loopbackpartner;
Faisal Latif6492cdf2008-07-24 20:50:45 -0700277
278 struct nes_timer_entry *send_entry;
279
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800280 spinlock_t retrans_list_lock;
281 struct list_head recv_list;
282 spinlock_t recv_list_lock;
283
284 int send_write0;
285 union {
286 struct ietf_mpa_frame mpa_frame;
287 u8 mpa_frame_buf[NES_CM_DEFAULT_MTU];
288 };
289 u16 mpa_frame_size;
290 struct iw_cm_id *cm_id;
291 struct list_head list;
292 int accelerated;
293 struct nes_cm_listener *listener;
294 enum nes_cm_conn_type conn_type;
295 struct nes_vnic *nesvnic;
296 int apbvt_set;
297 int accept_pend;
Faisal Latif6492cdf2008-07-24 20:50:45 -0700298 int freed;
Faisal Latif879e5bd2008-11-21 20:50:41 -0600299 struct list_head timer_entry;
300 struct list_head reset_entry;
Faisal Latif6492cdf2008-07-24 20:50:45 -0700301 struct nes_qp *nesqp;
Faisal Latif183ecfa2008-11-21 20:50:46 -0600302 atomic_t passive_state;
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800303};
304
305/* structure for client or CM to fill when making CM api calls. */
306/* - only need to set relevant data, based on op. */
307struct nes_cm_info {
308 union {
309 struct iw_cm_id *cm_id;
310 struct net_device *netdev;
311 };
312
313 u16 loc_port;
314 u16 rem_port;
315 nes_addr_t loc_addr;
316 nes_addr_t rem_addr;
317
318 enum nes_cm_conn_type conn_type;
319 int backlog;
320};
321
322/* CM event codes */
323enum nes_cm_event_type {
324 NES_CM_EVENT_UNKNOWN,
325 NES_CM_EVENT_ESTABLISHED,
326 NES_CM_EVENT_MPA_REQ,
327 NES_CM_EVENT_MPA_CONNECT,
328 NES_CM_EVENT_MPA_ACCEPT,
329 NES_CM_EVENT_MPA_ESTABLISHED,
330 NES_CM_EVENT_CONNECTED,
331 NES_CM_EVENT_CLOSED,
332 NES_CM_EVENT_RESET,
333 NES_CM_EVENT_DROPPED_PKT,
334 NES_CM_EVENT_CLOSE_IMMED,
335 NES_CM_EVENT_CLOSE_HARD,
336 NES_CM_EVENT_CLOSE_CLEAN,
337 NES_CM_EVENT_ABORTED,
338 NES_CM_EVENT_SEND_FIRST
339};
340
341/* event to post to CM event handler */
342struct nes_cm_event {
343 enum nes_cm_event_type type;
344
345 struct nes_cm_info cm_info;
346 struct work_struct event_work;
347 struct nes_cm_node *cm_node;
348};
349
350struct nes_cm_core {
351 enum nes_cm_node_state state;
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800352
353 atomic_t listen_node_cnt;
354 struct nes_cm_node listen_list;
355 spinlock_t listen_list_lock;
356
357 u32 mtu;
358 u32 free_tx_pkt_max;
359 u32 rx_pkt_posted;
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800360 atomic_t ht_node_cnt;
361 struct list_head connected_nodes;
362 /* struct list_head hashtable[NES_CM_HASHTABLE_SIZE]; */
363 spinlock_t ht_lock;
364
365 struct timer_list tcp_timer;
366
367 struct nes_cm_ops *api;
368
369 int (*post_event)(struct nes_cm_event *event);
370 atomic_t events_posted;
371 struct workqueue_struct *event_wq;
372 struct workqueue_struct *disconn_wq;
373
374 atomic_t node_cnt;
375 u64 aborted_connects;
376 u32 options;
377
378 struct nes_cm_node *current_listen_node;
379};
380
381
382#define NES_CM_SET_PKT_SIZE (1 << 1)
383#define NES_CM_SET_FREE_PKT_Q_SIZE (1 << 2)
384
385/* CM ops/API for client interface */
386struct nes_cm_ops {
387 int (*accelerated)(struct nes_cm_core *, struct nes_cm_node *);
388 struct nes_cm_listener * (*listen)(struct nes_cm_core *, struct nes_vnic *,
389 struct nes_cm_info *);
390 int (*stop_listener)(struct nes_cm_core *, struct nes_cm_listener *);
391 struct nes_cm_node * (*connect)(struct nes_cm_core *,
Faisal Latif6492cdf2008-07-24 20:50:45 -0700392 struct nes_vnic *, u16, void *,
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800393 struct nes_cm_info *);
394 int (*close)(struct nes_cm_core *, struct nes_cm_node *);
395 int (*accept)(struct nes_cm_core *, struct ietf_mpa_frame *,
396 struct nes_cm_node *);
397 int (*reject)(struct nes_cm_core *, struct ietf_mpa_frame *,
398 struct nes_cm_node *);
Faisal Latif4a14f6a2008-11-21 20:50:49 -0600399 int (*recv_pkt)(struct nes_cm_core *, struct nes_vnic *,
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800400 struct sk_buff *);
401 int (*destroy_cm_core)(struct nes_cm_core *);
402 int (*get)(struct nes_cm_core *);
403 int (*set)(struct nes_cm_core *, u32, u32);
404};
405
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800406int schedule_nes_timer(struct nes_cm_node *, struct sk_buff *,
407 enum nes_timer_type, int, int);
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800408
409int nes_cm_disconn(struct nes_qp *);
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800410
411int nes_accept(struct iw_cm_id *, struct iw_cm_conn_param *);
412int nes_reject(struct iw_cm_id *, const void *, u8);
413int nes_connect(struct iw_cm_id *, struct iw_cm_conn_param *);
414int nes_create_listen(struct iw_cm_id *, int);
415int nes_destroy_listen(struct iw_cm_id *);
416
417int nes_cm_recv(struct sk_buff *, struct net_device *);
418int nes_cm_start(void);
419int nes_cm_stop(void);
420
Glenn Streiff3c2d7742008-02-04 20:20:45 -0800421#endif /* NES_CM_H */