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12#ifndef _SMC_CORE_H
13#define _SMC_CORE_H
14
15#include <linux/atomic.h>
16#include <linux/smc.h>
17#include <linux/pci.h>
18#include <rdma/ib_verbs.h>
19#include <net/genetlink.h>
20
21#include "smc.h"
22#include "smc_ib.h"
23
24#define SMC_RMBS_PER_LGR_MAX 255
25
26struct smc_lgr_list {
27 struct list_head list;
28 spinlock_t lock;
29 u32 num;
30};
31
32enum smc_lgr_role {
33 SMC_CLNT,
34 SMC_SERV
35};
36
37enum smc_link_state {
38 SMC_LNK_UNUSED,
39 SMC_LNK_INACTIVE,
40 SMC_LNK_ACTIVATING,
41 SMC_LNK_ACTIVE,
42};
43
44#define SMC_WR_BUF_SIZE 48
45#define SMC_WR_BUF_V2_SIZE 8192
46
47struct smc_wr_buf {
48 u8 raw[SMC_WR_BUF_SIZE];
49};
50
51struct smc_wr_v2_buf {
52 u8 raw[SMC_WR_BUF_V2_SIZE];
53};
54
55#define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)
56
57enum smc_wr_reg_state {
58 POSTED,
59 CONFIRMED,
60 FAILED
61};
62
63struct smc_rdma_sge {
64 struct ib_sge wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE];
65};
66
67#define SMC_MAX_RDMA_WRITES 2
68
69
70
71struct smc_rdma_sges {
72 struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES];
73};
74
75struct smc_rdma_wr {
76
77
78 struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES];
79};
80
81#define SMC_LGR_ID_SIZE 4
82
83struct smc_link {
84 struct smc_ib_device *smcibdev;
85 u8 ibport;
86 struct ib_pd *roce_pd;
87
88
89 struct ib_qp *roce_qp;
90 struct ib_qp_attr qp_attr;
91
92 struct smc_wr_buf *wr_tx_bufs;
93 struct ib_send_wr *wr_tx_ibs;
94 struct ib_sge *wr_tx_sges;
95 struct smc_rdma_sges *wr_tx_rdma_sges;
96 struct smc_rdma_wr *wr_tx_rdmas;
97 struct smc_wr_tx_pend *wr_tx_pends;
98 struct completion *wr_tx_compl;
99
100 struct ib_send_wr *wr_tx_v2_ib;
101 struct ib_sge *wr_tx_v2_sge;
102 struct smc_wr_tx_pend *wr_tx_v2_pend;
103 dma_addr_t wr_tx_dma_addr;
104 dma_addr_t wr_tx_v2_dma_addr;
105 atomic_long_t wr_tx_id;
106 unsigned long *wr_tx_mask;
107 u32 wr_tx_cnt;
108 wait_queue_head_t wr_tx_wait;
109 atomic_t wr_tx_refcnt;
110
111 struct smc_wr_buf *wr_rx_bufs;
112 struct ib_recv_wr *wr_rx_ibs;
113 struct ib_sge *wr_rx_sges;
114
115 dma_addr_t wr_rx_dma_addr;
116 dma_addr_t wr_rx_v2_dma_addr;
117 u64 wr_rx_id;
118 u32 wr_rx_cnt;
119 unsigned long wr_rx_tstamp;
120
121 struct ib_reg_wr wr_reg;
122 wait_queue_head_t wr_reg_wait;
123 atomic_t wr_reg_refcnt;
124 enum smc_wr_reg_state wr_reg_state;
125
126 u8 gid[SMC_GID_SIZE];
127 u8 sgid_index;
128 u32 peer_qpn;
129 enum ib_mtu path_mtu;
130 enum ib_mtu peer_mtu;
131 u32 psn_initial;
132 u32 peer_psn;
133 u8 peer_mac[ETH_ALEN];
134 u8 peer_gid[SMC_GID_SIZE];
135 u8 link_id;
136 u8 link_uid[SMC_LGR_ID_SIZE];
137 u8 peer_link_uid[SMC_LGR_ID_SIZE];
138 u8 link_idx;
139 u8 link_is_asym;
140 u8 clearing : 1;
141 refcount_t refcnt;
142 struct smc_link_group *lgr;
143 struct work_struct link_down_wrk;
144 char ibname[IB_DEVICE_NAME_MAX];
145 int ndev_ifidx;
146
147 enum smc_link_state state;
148 struct delayed_work llc_testlink_wrk;
149 struct completion llc_testlink_resp;
150 int llc_testlink_time;
151 atomic_t conn_cnt;
152};
153
154
155
156
157#define SMC_LINKS_PER_LGR_MAX 3
158#define SMC_SINGLE_LINK 0
159
160
161struct smc_buf_desc {
162 struct list_head list;
163 void *cpu_addr;
164 struct page *pages;
165 int len;
166 u32 used;
167 union {
168 struct {
169 struct sg_table sgt[SMC_LINKS_PER_LGR_MAX];
170
171 struct ib_mr *mr_rx[SMC_LINKS_PER_LGR_MAX];
172
173
174
175 u32 order;
176
177 u8 is_conf_rkey;
178
179 u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX];
180
181 u8 is_map_ib[SMC_LINKS_PER_LGR_MAX];
182
183 u8 is_reg_err;
184
185 };
186 struct {
187 unsigned short sba_idx;
188
189 u64 token;
190
191 dma_addr_t dma_addr;
192
193 };
194 };
195};
196
197struct smc_rtoken {
198 u64 dma_addr;
199 u32 rkey;
200};
201
202#define SMC_BUF_MIN_SIZE 16384
203#define SMC_RMBE_SIZES 16
204
205
206
207
208
209struct smcd_dev;
210
211enum smc_lgr_type {
212 SMC_LGR_NONE,
213 SMC_LGR_SINGLE,
214 SMC_LGR_SYMMETRIC,
215 SMC_LGR_ASYMMETRIC_PEER,
216 SMC_LGR_ASYMMETRIC_LOCAL,
217};
218
219enum smc_llc_flowtype {
220 SMC_LLC_FLOW_NONE = 0,
221 SMC_LLC_FLOW_ADD_LINK = 2,
222 SMC_LLC_FLOW_DEL_LINK = 4,
223 SMC_LLC_FLOW_REQ_ADD_LINK = 5,
224 SMC_LLC_FLOW_RKEY = 6,
225};
226
227struct smc_llc_qentry;
228
229struct smc_llc_flow {
230 enum smc_llc_flowtype type;
231 struct smc_llc_qentry *qentry;
232};
233
234struct smc_link_group {
235 struct list_head list;
236 struct rb_root conns_all;
237 rwlock_t conns_lock;
238 unsigned int conns_num;
239 unsigned short vlan_id;
240
241 struct list_head sndbufs[SMC_RMBE_SIZES];
242 struct mutex sndbufs_lock;
243 struct list_head rmbs[SMC_RMBE_SIZES];
244 struct mutex rmbs_lock;
245
246 u8 id[SMC_LGR_ID_SIZE];
247 struct delayed_work free_work;
248 struct work_struct terminate_work;
249 struct workqueue_struct *tx_wq;
250 u8 sync_err : 1;
251 u8 terminating : 1;
252 u8 freeing : 1;
253
254 refcount_t refcnt;
255 bool is_smcd;
256 u8 smc_version;
257 u8 negotiated_eid[SMC_MAX_EID_LEN];
258 u8 peer_os;
259 u8 peer_smc_release;
260 u8 peer_hostname[SMC_MAX_HOSTNAME_LEN];
261 union {
262 struct {
263 enum smc_lgr_role role;
264
265 struct smc_link lnk[SMC_LINKS_PER_LGR_MAX];
266
267 struct smc_wr_v2_buf *wr_rx_buf_v2;
268
269 struct smc_wr_v2_buf *wr_tx_buf_v2;
270
271 char peer_systemid[SMC_SYSTEMID_LEN];
272
273 struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX]
274 [SMC_LINKS_PER_LGR_MAX];
275
276 DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
277
278 u8 next_link_id;
279 enum smc_lgr_type type;
280
281 u8 pnet_id[SMC_MAX_PNETID_LEN + 1];
282
283 struct list_head llc_event_q;
284
285 spinlock_t llc_event_q_lock;
286
287 struct mutex llc_conf_mutex;
288
289 struct work_struct llc_add_link_work;
290 struct work_struct llc_del_link_work;
291 struct work_struct llc_event_work;
292
293 wait_queue_head_t llc_flow_waiter;
294
295 wait_queue_head_t llc_msg_waiter;
296
297 struct smc_llc_flow llc_flow_lcl;
298
299 struct smc_llc_flow llc_flow_rmt;
300
301 struct smc_llc_qentry *delayed_event;
302
303 spinlock_t llc_flow_lock;
304
305 int llc_testlink_time;
306
307 u32 llc_termination_rsn;
308
309 u8 nexthop_mac[ETH_ALEN];
310 u8 uses_gateway;
311 __be32 saddr;
312
313 struct net *net;
314 };
315 struct {
316 u64 peer_gid;
317
318 struct smcd_dev *smcd;
319
320 u8 peer_shutdown : 1;
321
322 };
323 };
324};
325
326struct smc_clc_msg_local;
327
328#define GID_LIST_SIZE 2
329
330struct smc_gidlist {
331 u8 len;
332 u8 list[GID_LIST_SIZE][SMC_GID_SIZE];
333};
334
335struct smc_init_info_smcrv2 {
336
337 __be32 saddr;
338 struct sock *clc_sk;
339 __be32 daddr;
340
341
342 struct smc_ib_device *ib_dev_v2;
343 u8 ib_port_v2;
344 u8 ib_gid_v2[SMC_GID_SIZE];
345
346
347 u8 uses_gateway;
348 u8 nexthop_mac[ETH_ALEN];
349
350 struct smc_gidlist gidlist;
351};
352
353struct smc_init_info {
354 u8 is_smcd;
355 u8 smc_type_v1;
356 u8 smc_type_v2;
357 u8 first_contact_peer;
358 u8 first_contact_local;
359 unsigned short vlan_id;
360 u32 rc;
361 u8 negotiated_eid[SMC_MAX_EID_LEN];
362
363 u8 smcr_version;
364 u8 check_smcrv2;
365 u8 peer_gid[SMC_GID_SIZE];
366 u8 peer_mac[ETH_ALEN];
367 u8 peer_systemid[SMC_SYSTEMID_LEN];
368 struct smc_ib_device *ib_dev;
369 u8 ib_gid[SMC_GID_SIZE];
370 u8 ib_port;
371 u32 ib_clcqpn;
372 struct smc_init_info_smcrv2 smcrv2;
373
374 u64 ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
375 struct smcd_dev *ism_dev[SMC_MAX_ISM_DEVS + 1];
376 u16 ism_chid[SMC_MAX_ISM_DEVS + 1];
377 u8 ism_offered_cnt;
378 u8 ism_selected;
379 u8 smcd_version;
380};
381
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388
389static inline struct smc_connection *smc_lgr_find_conn(
390 u32 token, struct smc_link_group *lgr)
391{
392 struct smc_connection *res = NULL;
393 struct rb_node *node;
394
395 node = lgr->conns_all.rb_node;
396 while (node) {
397 struct smc_connection *cur = rb_entry(node,
398 struct smc_connection, alert_node);
399
400 if (cur->alert_token_local > token) {
401 node = node->rb_left;
402 } else {
403 if (cur->alert_token_local < token) {
404 node = node->rb_right;
405 } else {
406 res = cur;
407 break;
408 }
409 }
410 }
411
412 return res;
413}
414
415static inline bool smc_conn_lgr_valid(struct smc_connection *conn)
416{
417 return conn->lgr && conn->alert_token_local;
418}
419
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425
426
427static inline bool smc_link_usable(struct smc_link *lnk)
428{
429 if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE)
430 return false;
431 return true;
432}
433
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442
443static inline bool smc_link_sendable(struct smc_link *lnk)
444{
445 return smc_link_usable(lnk) &&
446 lnk->qp_attr.cur_qp_state == IB_QPS_RTS;
447}
448
449static inline bool smc_link_active(struct smc_link *lnk)
450{
451 return lnk->state == SMC_LNK_ACTIVE;
452}
453
454static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
455{
456 sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
457 be16_to_cpu(((__be16 *)gid_raw)[0]),
458 be16_to_cpu(((__be16 *)gid_raw)[1]),
459 be16_to_cpu(((__be16 *)gid_raw)[2]),
460 be16_to_cpu(((__be16 *)gid_raw)[3]),
461 be16_to_cpu(((__be16 *)gid_raw)[4]),
462 be16_to_cpu(((__be16 *)gid_raw)[5]),
463 be16_to_cpu(((__be16 *)gid_raw)[6]),
464 be16_to_cpu(((__be16 *)gid_raw)[7]));
465}
466
467struct smc_pci_dev {
468 __u32 pci_fid;
469 __u16 pci_pchid;
470 __u16 pci_vendor;
471 __u16 pci_device;
472 __u8 pci_id[SMC_PCI_ID_STR_LEN];
473};
474
475static inline void smc_set_pci_values(struct pci_dev *pci_dev,
476 struct smc_pci_dev *smc_dev)
477{
478 smc_dev->pci_vendor = pci_dev->vendor;
479 smc_dev->pci_device = pci_dev->device;
480 snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
481 pci_name(pci_dev));
482#if IS_ENABLED(CONFIG_S390)
483 {
484 struct zpci_dev *zdev;
485
486 zdev = to_zpci(pci_dev);
487 smc_dev->pci_fid = zdev->fid;
488 smc_dev->pci_pchid = zdev->pchid;
489 }
490#endif
491}
492
493struct smc_sock;
494struct smc_clc_msg_accept_confirm;
495
496void smc_lgr_cleanup_early(struct smc_link_group *lgr);
497void smc_lgr_terminate_sched(struct smc_link_group *lgr);
498void smc_lgr_hold(struct smc_link_group *lgr);
499void smc_lgr_put(struct smc_link_group *lgr);
500void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport);
501void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport);
502void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
503 unsigned short vlan);
504void smc_smcd_terminate_all(struct smcd_dev *dev);
505void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
506int smc_buf_create(struct smc_sock *smc, bool is_smcd);
507int smc_uncompress_bufsize(u8 compressed);
508int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
509 struct smc_clc_msg_accept_confirm *clc);
510int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
511int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
512void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new,
513 __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey);
514void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id,
515 __be64 nw_vaddr, __be32 nw_rkey);
516void smc_sndbuf_sync_sg_for_cpu(struct smc_connection *conn);
517void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn);
518void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn);
519void smc_rmb_sync_sg_for_device(struct smc_connection *conn);
520int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini);
521
522void smc_conn_free(struct smc_connection *conn);
523int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini);
524void smc_lgr_schedule_free_work_fast(struct smc_link_group *lgr);
525int smc_core_init(void);
526void smc_core_exit(void);
527
528int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
529 u8 link_idx, struct smc_init_info *ini);
530void smcr_link_clear(struct smc_link *lnk, bool log);
531void smcr_link_hold(struct smc_link *lnk);
532void smcr_link_put(struct smc_link *lnk);
533void smc_switch_link_and_count(struct smc_connection *conn,
534 struct smc_link *to_lnk);
535int smcr_buf_map_lgr(struct smc_link *lnk);
536int smcr_buf_reg_lgr(struct smc_link *lnk);
537void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);
538void smcr_lgr_set_type_asym(struct smc_link_group *lgr,
539 enum smc_lgr_type new_type, int asym_lnk_idx);
540int smcr_link_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc);
541struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
542 struct smc_link *from_lnk, bool is_dev_err);
543void smcr_link_down_cond(struct smc_link *lnk);
544void smcr_link_down_cond_sched(struct smc_link *lnk);
545int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
546int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
547int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
548int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
549
550static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
551{
552 return link->lgr;
553}
554#endif
555