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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
46struct smc_wr_buf {
47 u8 raw[SMC_WR_BUF_SIZE];
48};
49
50#define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)
51
52enum smc_wr_reg_state {
53 POSTED,
54 CONFIRMED,
55 FAILED
56};
57
58struct smc_rdma_sge {
59 struct ib_sge wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE];
60};
61
62#define SMC_MAX_RDMA_WRITES 2
63
64
65
66struct smc_rdma_sges {
67 struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES];
68};
69
70struct smc_rdma_wr {
71
72
73 struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES];
74};
75
76#define SMC_LGR_ID_SIZE 4
77
78struct smc_link {
79 struct smc_ib_device *smcibdev;
80 u8 ibport;
81 struct ib_pd *roce_pd;
82
83
84 struct ib_qp *roce_qp;
85 struct ib_qp_attr qp_attr;
86
87 struct smc_wr_buf *wr_tx_bufs;
88 struct ib_send_wr *wr_tx_ibs;
89 struct ib_sge *wr_tx_sges;
90 struct smc_rdma_sges *wr_tx_rdma_sges;
91 struct smc_rdma_wr *wr_tx_rdmas;
92 struct smc_wr_tx_pend *wr_tx_pends;
93 struct completion *wr_tx_compl;
94
95 dma_addr_t wr_tx_dma_addr;
96 atomic_long_t wr_tx_id;
97 unsigned long *wr_tx_mask;
98 u32 wr_tx_cnt;
99 wait_queue_head_t wr_tx_wait;
100 atomic_t wr_tx_refcnt;
101
102 struct smc_wr_buf *wr_rx_bufs;
103 struct ib_recv_wr *wr_rx_ibs;
104 struct ib_sge *wr_rx_sges;
105
106 dma_addr_t wr_rx_dma_addr;
107 u64 wr_rx_id;
108 u32 wr_rx_cnt;
109 unsigned long wr_rx_tstamp;
110
111 struct ib_reg_wr wr_reg;
112 wait_queue_head_t wr_reg_wait;
113 atomic_t wr_reg_refcnt;
114 enum smc_wr_reg_state wr_reg_state;
115
116 u8 gid[SMC_GID_SIZE];
117 u8 sgid_index;
118 u32 peer_qpn;
119 enum ib_mtu path_mtu;
120 enum ib_mtu peer_mtu;
121 u32 psn_initial;
122 u32 peer_psn;
123 u8 peer_mac[ETH_ALEN];
124 u8 peer_gid[SMC_GID_SIZE];
125 u8 link_id;
126 u8 link_uid[SMC_LGR_ID_SIZE];
127 u8 peer_link_uid[SMC_LGR_ID_SIZE];
128 u8 link_idx;
129 u8 link_is_asym;
130 struct smc_link_group *lgr;
131 struct work_struct link_down_wrk;
132 char ibname[IB_DEVICE_NAME_MAX];
133 int ndev_ifidx;
134
135 enum smc_link_state state;
136 struct delayed_work llc_testlink_wrk;
137 struct completion llc_testlink_resp;
138 int llc_testlink_time;
139 atomic_t conn_cnt;
140};
141
142
143
144
145#define SMC_LINKS_PER_LGR_MAX 3
146#define SMC_SINGLE_LINK 0
147
148
149struct smc_buf_desc {
150 struct list_head list;
151 void *cpu_addr;
152 struct page *pages;
153 int len;
154 u32 used;
155 union {
156 struct {
157 struct sg_table sgt[SMC_LINKS_PER_LGR_MAX];
158
159 struct ib_mr *mr_rx[SMC_LINKS_PER_LGR_MAX];
160
161
162
163 u32 order;
164
165 u8 is_conf_rkey;
166
167 u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX];
168
169 u8 is_map_ib[SMC_LINKS_PER_LGR_MAX];
170
171 u8 is_reg_err;
172
173 };
174 struct {
175 unsigned short sba_idx;
176
177 u64 token;
178
179 dma_addr_t dma_addr;
180
181 };
182 };
183};
184
185struct smc_rtoken {
186 u64 dma_addr;
187 u32 rkey;
188};
189
190#define SMC_BUF_MIN_SIZE 16384
191#define SMC_RMBE_SIZES 16
192
193
194
195
196
197struct smcd_dev;
198
199enum smc_lgr_type {
200 SMC_LGR_NONE,
201 SMC_LGR_SINGLE,
202 SMC_LGR_SYMMETRIC,
203 SMC_LGR_ASYMMETRIC_PEER,
204 SMC_LGR_ASYMMETRIC_LOCAL,
205};
206
207enum smc_llc_flowtype {
208 SMC_LLC_FLOW_NONE = 0,
209 SMC_LLC_FLOW_ADD_LINK = 2,
210 SMC_LLC_FLOW_DEL_LINK = 4,
211 SMC_LLC_FLOW_RKEY = 6,
212};
213
214struct smc_llc_qentry;
215
216struct smc_llc_flow {
217 enum smc_llc_flowtype type;
218 struct smc_llc_qentry *qentry;
219};
220
221struct smc_link_group {
222 struct list_head list;
223 struct rb_root conns_all;
224 rwlock_t conns_lock;
225 unsigned int conns_num;
226 unsigned short vlan_id;
227
228 struct list_head sndbufs[SMC_RMBE_SIZES];
229 struct mutex sndbufs_lock;
230 struct list_head rmbs[SMC_RMBE_SIZES];
231 struct mutex rmbs_lock;
232
233 u8 id[SMC_LGR_ID_SIZE];
234 struct delayed_work free_work;
235 struct work_struct terminate_work;
236 struct workqueue_struct *tx_wq;
237 u8 sync_err : 1;
238 u8 terminating : 1;
239 u8 freeing : 1;
240
241 bool is_smcd;
242 u8 smc_version;
243 u8 negotiated_eid[SMC_MAX_EID_LEN];
244 u8 peer_os;
245 u8 peer_smc_release;
246 u8 peer_hostname[SMC_MAX_HOSTNAME_LEN];
247 union {
248 struct {
249 enum smc_lgr_role role;
250
251 struct smc_link lnk[SMC_LINKS_PER_LGR_MAX];
252
253 char peer_systemid[SMC_SYSTEMID_LEN];
254
255 struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX]
256 [SMC_LINKS_PER_LGR_MAX];
257
258 DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
259
260 u8 next_link_id;
261 enum smc_lgr_type type;
262
263 u8 pnet_id[SMC_MAX_PNETID_LEN + 1];
264
265 struct list_head llc_event_q;
266
267 spinlock_t llc_event_q_lock;
268
269 struct mutex llc_conf_mutex;
270
271 struct work_struct llc_add_link_work;
272 struct work_struct llc_del_link_work;
273 struct work_struct llc_event_work;
274
275 wait_queue_head_t llc_flow_waiter;
276
277 wait_queue_head_t llc_msg_waiter;
278
279 struct smc_llc_flow llc_flow_lcl;
280
281 struct smc_llc_flow llc_flow_rmt;
282
283 struct smc_llc_qentry *delayed_event;
284
285 spinlock_t llc_flow_lock;
286
287 int llc_testlink_time;
288
289 u32 llc_termination_rsn;
290
291 };
292 struct {
293 u64 peer_gid;
294
295 struct smcd_dev *smcd;
296
297 u8 peer_shutdown : 1;
298
299 };
300 };
301};
302
303struct smc_clc_msg_local;
304
305struct smc_init_info {
306 u8 is_smcd;
307 u8 smc_type_v1;
308 u8 smc_type_v2;
309 u8 first_contact_peer;
310 u8 first_contact_local;
311 unsigned short vlan_id;
312 u32 rc;
313
314 struct smc_clc_msg_local *ib_lcl;
315 struct smc_ib_device *ib_dev;
316 u8 ib_gid[SMC_GID_SIZE];
317 u8 ib_port;
318 u32 ib_clcqpn;
319
320 u64 ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
321 struct smcd_dev *ism_dev[SMC_MAX_ISM_DEVS + 1];
322 u16 ism_chid[SMC_MAX_ISM_DEVS + 1];
323 u8 ism_offered_cnt;
324 u8 ism_selected;
325 u8 smcd_version;
326};
327
328
329
330
331
332
333
334
335static inline struct smc_connection *smc_lgr_find_conn(
336 u32 token, struct smc_link_group *lgr)
337{
338 struct smc_connection *res = NULL;
339 struct rb_node *node;
340
341 node = lgr->conns_all.rb_node;
342 while (node) {
343 struct smc_connection *cur = rb_entry(node,
344 struct smc_connection, alert_node);
345
346 if (cur->alert_token_local > token) {
347 node = node->rb_left;
348 } else {
349 if (cur->alert_token_local < token) {
350 node = node->rb_right;
351 } else {
352 res = cur;
353 break;
354 }
355 }
356 }
357
358 return res;
359}
360
361
362static inline bool smc_link_usable(struct smc_link *lnk)
363{
364 if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE)
365 return false;
366 return true;
367}
368
369static inline bool smc_link_active(struct smc_link *lnk)
370{
371 return lnk->state == SMC_LNK_ACTIVE;
372}
373
374static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
375{
376 sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
377 be16_to_cpu(((__be16 *)gid_raw)[0]),
378 be16_to_cpu(((__be16 *)gid_raw)[1]),
379 be16_to_cpu(((__be16 *)gid_raw)[2]),
380 be16_to_cpu(((__be16 *)gid_raw)[3]),
381 be16_to_cpu(((__be16 *)gid_raw)[4]),
382 be16_to_cpu(((__be16 *)gid_raw)[5]),
383 be16_to_cpu(((__be16 *)gid_raw)[6]),
384 be16_to_cpu(((__be16 *)gid_raw)[7]));
385}
386
387struct smc_pci_dev {
388 __u32 pci_fid;
389 __u16 pci_pchid;
390 __u16 pci_vendor;
391 __u16 pci_device;
392 __u8 pci_id[SMC_PCI_ID_STR_LEN];
393};
394
395static inline void smc_set_pci_values(struct pci_dev *pci_dev,
396 struct smc_pci_dev *smc_dev)
397{
398 smc_dev->pci_vendor = pci_dev->vendor;
399 smc_dev->pci_device = pci_dev->device;
400 snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
401 pci_name(pci_dev));
402#if IS_ENABLED(CONFIG_S390)
403 {
404 struct zpci_dev *zdev;
405
406 zdev = to_zpci(pci_dev);
407 smc_dev->pci_fid = zdev->fid;
408 smc_dev->pci_pchid = zdev->pchid;
409 }
410#endif
411}
412
413struct smc_sock;
414struct smc_clc_msg_accept_confirm;
415
416void smc_lgr_cleanup_early(struct smc_connection *conn);
417void smc_lgr_terminate_sched(struct smc_link_group *lgr);
418void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport);
419void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport);
420void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
421 unsigned short vlan);
422void smc_smcd_terminate_all(struct smcd_dev *dev);
423void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
424int smc_buf_create(struct smc_sock *smc, bool is_smcd);
425int smc_uncompress_bufsize(u8 compressed);
426int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
427 struct smc_clc_msg_accept_confirm *clc);
428int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
429int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
430void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new,
431 __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey);
432void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id,
433 __be64 nw_vaddr, __be32 nw_rkey);
434void smc_sndbuf_sync_sg_for_cpu(struct smc_connection *conn);
435void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn);
436void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn);
437void smc_rmb_sync_sg_for_device(struct smc_connection *conn);
438int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini);
439
440void smc_conn_free(struct smc_connection *conn);
441int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini);
442void smc_lgr_schedule_free_work_fast(struct smc_link_group *lgr);
443int smc_core_init(void);
444void smc_core_exit(void);
445
446int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
447 u8 link_idx, struct smc_init_info *ini);
448void smcr_link_clear(struct smc_link *lnk, bool log);
449void smc_switch_link_and_count(struct smc_connection *conn,
450 struct smc_link *to_lnk);
451int smcr_buf_map_lgr(struct smc_link *lnk);
452int smcr_buf_reg_lgr(struct smc_link *lnk);
453void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);
454void smcr_lgr_set_type_asym(struct smc_link_group *lgr,
455 enum smc_lgr_type new_type, int asym_lnk_idx);
456int smcr_link_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc);
457struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
458 struct smc_link *from_lnk, bool is_dev_err);
459void smcr_link_down_cond(struct smc_link *lnk);
460void smcr_link_down_cond_sched(struct smc_link *lnk);
461int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
462int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
463int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
464int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
465
466static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
467{
468 return link->lgr;
469}
470#endif
471