1 /* SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB */
2 /* Copyright (c) 2015 - 2021 Intel Corporation */
3 #ifndef IRDMA_CM_H
4 #define IRDMA_CM_H
5
6 #define IRDMA_MPA_REQUEST_ACCEPT 1
7 #define IRDMA_MPA_REQUEST_REJECT 2
8
9 /* IETF MPA -- defines */
10 #define IEFT_MPA_KEY_REQ "MPA ID Req Frame"
11 #define IEFT_MPA_KEY_REP "MPA ID Rep Frame"
12 #define IETF_MPA_KEY_SIZE 16
13 #define IETF_MPA_VER 1
14 #define IETF_MAX_PRIV_DATA_LEN 512
15 #define IETF_MPA_FRAME_SIZE 20
16 #define IETF_RTR_MSG_SIZE 4
17 #define IETF_MPA_V2_FLAG 0x10
18 #define SNDMARKER_SEQNMASK 0x000001ff
19 #define IRDMA_MAX_IETF_SIZE 32
20
21 /* IETF RTR MSG Fields */
22 #define IETF_PEER_TO_PEER 0x8000
23 #define IETF_FLPDU_ZERO_LEN 0x4000
24 #define IETF_RDMA0_WRITE 0x8000
25 #define IETF_RDMA0_READ 0x4000
26 #define IETF_NO_IRD_ORD 0x3fff
27
28 #define MAX_PORTS 65536
29
30 #define IRDMA_PASSIVE_STATE_INDICATED 0
31 #define IRDMA_DO_NOT_SEND_RESET_EVENT 1
32 #define IRDMA_SEND_RESET_EVENT 2
33
34 #define MAX_IRDMA_IFS 4
35
36 #define SET_ACK 1
37 #define SET_SYN 2
38 #define SET_FIN 4
39 #define SET_RST 8
40
41 #define TCP_OPTIONS_PADDING 3
42
43 #define IRDMA_DEFAULT_RETRYS 64
44 #define IRDMA_DEFAULT_RETRANS 32
45 #define IRDMA_DEFAULT_TTL 0x40
46 #define IRDMA_DEFAULT_RTT_VAR 6
47 #define IRDMA_DEFAULT_SS_THRESH 0x3fffffff
48 #define IRDMA_DEFAULT_REXMIT_THRESH 8
49
50 #define IRDMA_RETRY_TIMEOUT HZ
51 #define IRDMA_SHORT_TIME 10
52 #define IRDMA_LONG_TIME (2 * HZ)
53 #define IRDMA_MAX_TIMEOUT ((unsigned long)(12 * HZ))
54
55 #define IRDMA_CM_HASHTABLE_SIZE 1024
56 #define IRDMA_CM_TCP_TIMER_INTERVAL 3000
57 #define IRDMA_CM_DEFAULT_MTU 1540
58 #define IRDMA_CM_DEFAULT_FRAME_CNT 10
59 #define IRDMA_CM_THREAD_STACK_SIZE 256
60 #define IRDMA_CM_DEFAULT_RCV_WND 64240
61 #define IRDMA_CM_DEFAULT_RCV_WND_SCALED 0x3FFFC
62 #define IRDMA_CM_DEFAULT_RCV_WND_SCALE 2
63 #define IRDMA_CM_DEFAULT_FREE_PKTS 10
64 #define IRDMA_CM_FREE_PKT_LO_WATERMARK 2
65 #define IRDMA_CM_DEFAULT_MSS 536
66 #define IRDMA_CM_DEFAULT_MPA_VER 2
67 #define IRDMA_CM_DEFAULT_SEQ 0x159bf75f
68 #define IRDMA_CM_DEFAULT_LOCAL_ID 0x3b47
69 #define IRDMA_CM_DEFAULT_SEQ2 0x18ed5740
70 #define IRDMA_CM_DEFAULT_LOCAL_ID2 0xb807
71 #define IRDMA_MAX_CM_BUF (IRDMA_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN)
72
73 enum ietf_mpa_flags {
74 IETF_MPA_FLAGS_REJECT = 0x20,
75 IETF_MPA_FLAGS_CRC = 0x40,
76 IETF_MPA_FLAGS_MARKERS = 0x80,
77 };
78
79 enum irdma_timer_type {
80 IRDMA_TIMER_TYPE_SEND,
81 IRDMA_TIMER_TYPE_CLOSE,
82 };
83
84 enum option_nums {
85 OPTION_NUM_EOL,
86 OPTION_NUM_NONE,
87 OPTION_NUM_MSS,
88 OPTION_NUM_WINDOW_SCALE,
89 OPTION_NUM_SACK_PERM,
90 OPTION_NUM_SACK,
91 OPTION_NUM_WRITE0 = 0xbc,
92 };
93
94 /* cm node transition states */
95 enum irdma_cm_node_state {
96 IRDMA_CM_STATE_UNKNOWN,
97 IRDMA_CM_STATE_INITED,
98 IRDMA_CM_STATE_LISTENING,
99 IRDMA_CM_STATE_SYN_RCVD,
100 IRDMA_CM_STATE_SYN_SENT,
101 IRDMA_CM_STATE_ONE_SIDE_ESTABLISHED,
102 IRDMA_CM_STATE_ESTABLISHED,
103 IRDMA_CM_STATE_ACCEPTING,
104 IRDMA_CM_STATE_MPAREQ_SENT,
105 IRDMA_CM_STATE_MPAREQ_RCVD,
106 IRDMA_CM_STATE_MPAREJ_RCVD,
107 IRDMA_CM_STATE_OFFLOADED,
108 IRDMA_CM_STATE_FIN_WAIT1,
109 IRDMA_CM_STATE_FIN_WAIT2,
110 IRDMA_CM_STATE_CLOSE_WAIT,
111 IRDMA_CM_STATE_TIME_WAIT,
112 IRDMA_CM_STATE_LAST_ACK,
113 IRDMA_CM_STATE_CLOSING,
114 IRDMA_CM_STATE_LISTENER_DESTROYED,
115 IRDMA_CM_STATE_CLOSED,
116 };
117
118 enum mpa_frame_ver {
119 IETF_MPA_V1 = 1,
120 IETF_MPA_V2 = 2,
121 };
122
123 enum mpa_frame_key {
124 MPA_KEY_REQUEST,
125 MPA_KEY_REPLY,
126 };
127
128 enum send_rdma0 {
129 SEND_RDMA_READ_ZERO = 1,
130 SEND_RDMA_WRITE_ZERO = 2,
131 };
132
133 enum irdma_tcpip_pkt_type {
134 IRDMA_PKT_TYPE_UNKNOWN,
135 IRDMA_PKT_TYPE_SYN,
136 IRDMA_PKT_TYPE_SYNACK,
137 IRDMA_PKT_TYPE_ACK,
138 IRDMA_PKT_TYPE_FIN,
139 IRDMA_PKT_TYPE_RST,
140 };
141
142 enum irdma_cm_listener_state {
143 IRDMA_CM_LISTENER_PASSIVE_STATE = 1,
144 IRDMA_CM_LISTENER_ACTIVE_STATE = 2,
145 IRDMA_CM_LISTENER_EITHER_STATE = 3,
146 };
147
148 /* CM event codes */
149 enum irdma_cm_event_type {
150 IRDMA_CM_EVENT_UNKNOWN,
151 IRDMA_CM_EVENT_ESTABLISHED,
152 IRDMA_CM_EVENT_MPA_REQ,
153 IRDMA_CM_EVENT_MPA_CONNECT,
154 IRDMA_CM_EVENT_MPA_ACCEPT,
155 IRDMA_CM_EVENT_MPA_REJECT,
156 IRDMA_CM_EVENT_MPA_ESTABLISHED,
157 IRDMA_CM_EVENT_CONNECTED,
158 IRDMA_CM_EVENT_RESET,
159 IRDMA_CM_EVENT_ABORTED,
160 };
161
162 struct ietf_mpa_v1 {
163 u8 key[IETF_MPA_KEY_SIZE];
164 u8 flags;
165 u8 rev;
166 __be16 priv_data_len;
167 u8 priv_data[];
168 };
169
170 struct ietf_rtr_msg {
171 __be16 ctrl_ird;
172 __be16 ctrl_ord;
173 };
174
175 struct ietf_mpa_v2 {
176 u8 key[IETF_MPA_KEY_SIZE];
177 u8 flags;
178 u8 rev;
179 __be16 priv_data_len;
180 struct ietf_rtr_msg rtr_msg;
181 u8 priv_data[];
182 };
183
184 struct option_base {
185 u8 optionnum;
186 u8 len;
187 };
188
189 struct option_mss {
190 u8 optionnum;
191 u8 len;
192 __be16 mss;
193 };
194
195 struct option_windowscale {
196 u8 optionnum;
197 u8 len;
198 u8 shiftcount;
199 };
200
201 union all_known_options {
202 char eol;
203 struct option_base base;
204 struct option_mss mss;
205 struct option_windowscale windowscale;
206 };
207
208 struct irdma_timer_entry {
209 struct list_head list;
210 unsigned long timetosend; /* jiffies */
211 struct irdma_puda_buf *sqbuf;
212 u32 type;
213 u32 retrycount;
214 u32 retranscount;
215 u32 context;
216 u32 send_retrans;
217 int close_when_complete;
218 };
219
220 /* CM context params */
221 struct irdma_cm_tcp_context {
222 u8 client;
223 u32 loc_seq_num;
224 u32 loc_ack_num;
225 u32 rem_ack_num;
226 u32 rcv_nxt;
227 u32 loc_id;
228 u32 rem_id;
229 u32 snd_wnd;
230 u32 max_snd_wnd;
231 u32 rcv_wnd;
232 u32 mss;
233 u8 snd_wscale;
234 u8 rcv_wscale;
235 };
236
237 struct irdma_apbvt_entry {
238 struct hlist_node hlist;
239 u32 use_cnt;
240 u16 port;
241 };
242
243 struct irdma_cm_listener {
244 struct list_head list;
245 struct iw_cm_id *cm_id;
246 struct irdma_cm_core *cm_core;
247 struct irdma_device *iwdev;
248 struct list_head child_listen_list;
249 struct irdma_apbvt_entry *apbvt_entry;
250 enum irdma_cm_listener_state listener_state;
251 refcount_t refcnt;
252 atomic_t pend_accepts_cnt;
253 u32 loc_addr[4];
254 u32 reused_node;
255 int backlog;
256 u16 loc_port;
257 u16 vlan_id;
258 u8 loc_mac[ETH_ALEN];
259 u8 user_pri;
260 u8 tos;
261 bool qhash_set:1;
262 bool ipv4:1;
263 };
264
265 struct irdma_kmem_info {
266 void *addr;
267 u32 size;
268 };
269
270 struct irdma_mpa_priv_info {
271 const void *addr;
272 u32 size;
273 };
274
275 struct irdma_cm_node {
276 struct irdma_qp *iwqp;
277 struct irdma_device *iwdev;
278 struct irdma_sc_dev *dev;
279 struct irdma_cm_tcp_context tcp_cntxt;
280 struct irdma_cm_core *cm_core;
281 struct irdma_timer_entry *send_entry;
282 struct irdma_timer_entry *close_entry;
283 struct irdma_cm_listener *listener;
284 struct list_head timer_entry;
285 struct list_head reset_entry;
286 struct list_head teardown_entry;
287 struct irdma_apbvt_entry *apbvt_entry;
288 struct rcu_head rcu_head;
289 struct irdma_mpa_priv_info pdata;
290 struct irdma_sc_ah *ah;
291 union {
292 struct ietf_mpa_v1 mpa_frame;
293 struct ietf_mpa_v2 mpa_v2_frame;
294 };
295 struct irdma_kmem_info mpa_hdr;
296 struct iw_cm_id *cm_id;
297 struct hlist_node list;
298 struct completion establish_comp;
299 spinlock_t retrans_list_lock; /* protect CM node rexmit updates*/
300 atomic_t passive_state;
301 refcount_t refcnt;
302 enum irdma_cm_node_state state;
303 enum send_rdma0 send_rdma0_op;
304 enum mpa_frame_ver mpa_frame_rev;
305 u32 loc_addr[4], rem_addr[4];
306 u16 loc_port, rem_port;
307 int apbvt_set;
308 int accept_pend;
309 u16 vlan_id;
310 u16 ird_size;
311 u16 ord_size;
312 u16 mpav2_ird_ord;
313 u16 lsmm_size;
314 u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN];
315 u8 loc_mac[ETH_ALEN];
316 u8 rem_mac[ETH_ALEN];
317 u8 user_pri;
318 u8 tos;
319 bool ack_rcvd:1;
320 bool qhash_set:1;
321 bool ipv4:1;
322 bool snd_mark_en:1;
323 bool rcv_mark_en:1;
324 bool do_lpb:1;
325 bool accelerated:1;
326 };
327
328 /* Used by internal CM APIs to pass CM information*/
329 struct irdma_cm_info {
330 struct iw_cm_id *cm_id;
331 u16 loc_port;
332 u16 rem_port;
333 u32 loc_addr[4];
334 u32 rem_addr[4];
335 u32 qh_qpid;
336 u16 vlan_id;
337 int backlog;
338 u8 user_pri;
339 u8 tos;
340 bool ipv4;
341 };
342
343 struct irdma_cm_event {
344 enum irdma_cm_event_type type;
345 struct irdma_cm_info cm_info;
346 struct work_struct event_work;
347 struct irdma_cm_node *cm_node;
348 };
349
350 struct irdma_cm_core {
351 struct irdma_device *iwdev;
352 struct irdma_sc_dev *dev;
353 struct list_head listen_list;
354 DECLARE_HASHTABLE(cm_hash_tbl, 8);
355 DECLARE_HASHTABLE(apbvt_hash_tbl, 8);
356 struct timer_list tcp_timer;
357 struct workqueue_struct *event_wq;
358 spinlock_t ht_lock; /* protect CM node (active side) list */
359 spinlock_t listen_list_lock; /* protect listener list */
360 spinlock_t apbvt_lock; /*serialize apbvt add/del entries*/
361 u64 stats_nodes_created;
362 u64 stats_nodes_destroyed;
363 u64 stats_listen_created;
364 u64 stats_listen_destroyed;
365 u64 stats_listen_nodes_created;
366 u64 stats_listen_nodes_destroyed;
367 u64 stats_lpbs;
368 u64 stats_accepts;
369 u64 stats_rejects;
370 u64 stats_connect_errs;
371 u64 stats_passive_errs;
372 u64 stats_pkt_retrans;
373 u64 stats_backlog_drops;
374 struct irdma_puda_buf *(*form_cm_frame)(struct irdma_cm_node *cm_node,
375 struct irdma_kmem_info *options,
376 struct irdma_kmem_info *hdr,
377 struct irdma_mpa_priv_info *pdata,
378 u8 flags);
379 int (*cm_create_ah)(struct irdma_cm_node *cm_node, bool wait);
380 void (*cm_free_ah)(struct irdma_cm_node *cm_node);
381 };
382
383 int irdma_schedule_cm_timer(struct irdma_cm_node *cm_node,
384 struct irdma_puda_buf *sqbuf,
385 enum irdma_timer_type type, int send_retrans,
386 int close_when_complete);
387
irdma_tos2dscp(u8 tos)388 static inline u8 irdma_tos2dscp(u8 tos)
389 {
390 #define IRDMA_DSCP_VAL GENMASK(7, 2)
391 return (u8)FIELD_GET(IRDMA_DSCP_VAL, tos);
392 }
393
394 int irdma_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
395 int irdma_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
396 int irdma_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
397 int irdma_create_listen(struct iw_cm_id *cm_id, int backlog);
398 int irdma_destroy_listen(struct iw_cm_id *cm_id);
399 int irdma_add_arp(struct irdma_pci_f *rf, u32 *ip, bool ipv4, const u8 *mac);
400 void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
401 struct irdma_cm_info *nfo,
402 bool disconnect_all);
403 int irdma_cm_start(struct irdma_device *dev);
404 int irdma_cm_stop(struct irdma_device *dev);
405 bool irdma_ipv4_is_lpb(u32 loc_addr, u32 rem_addr);
406 bool irdma_ipv6_is_lpb(u32 *loc_addr, u32 *rem_addr);
407 int irdma_arp_table(struct irdma_pci_f *rf, u32 *ip_addr, bool ipv4,
408 const u8 *mac_addr, u32 action);
409 void irdma_if_notify(struct irdma_device *iwdev, struct net_device *netdev,
410 u32 *ipaddr, bool ipv4, bool ifup);
411 bool irdma_port_in_use(struct irdma_cm_core *cm_core, u16 port);
412 void irdma_send_ack(struct irdma_cm_node *cm_node);
413 void irdma_lpb_nop(struct irdma_sc_qp *qp);
414 void irdma_rem_ref_cm_node(struct irdma_cm_node *cm_node);
415 void irdma_add_conn_est_qh(struct irdma_cm_node *cm_node);
416 #endif /* IRDMA_CM_H */
417