1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
2 /*
3 * Copyright(c) 2015 - 2018 Intel Corporation.
4 */
5
6 #ifndef HFI1_VERBS_H
7 #define HFI1_VERBS_H
8
9 #include <linux/types.h>
10 #include <linux/seqlock.h>
11 #include <linux/kernel.h>
12 #include <linux/interrupt.h>
13 #include <linux/kref.h>
14 #include <linux/workqueue.h>
15 #include <linux/kthread.h>
16 #include <linux/completion.h>
17 #include <linux/slab.h>
18 #include <rdma/ib_pack.h>
19 #include <rdma/ib_user_verbs.h>
20 #include <rdma/ib_mad.h>
21 #include <rdma/ib_hdrs.h>
22 #include <rdma/rdma_vt.h>
23 #include <rdma/rdmavt_qp.h>
24 #include <rdma/rdmavt_cq.h>
25
26 struct hfi1_ctxtdata;
27 struct hfi1_pportdata;
28 struct hfi1_devdata;
29 struct hfi1_packet;
30
31 #include "iowait.h"
32 #include "tid_rdma.h"
33 #include "opfn.h"
34
35 #define HFI1_MAX_RDMA_ATOMIC 16
36
37 /*
38 * Increment this value if any changes that break userspace ABI
39 * compatibility are made.
40 */
41 #define HFI1_UVERBS_ABI_VERSION 2
42
43 /* IB Performance Manager status values */
44 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
45 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
46 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
47
48 /* Mandatory IB performance counter select values. */
49 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
50 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
51 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
52 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
53 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
54
55 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
56
57 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
58 #define OPA_BTH_MIG_REQ BIT(31)
59
60 #define RC_OP(x) IB_OPCODE_RC_##x
61 #define UC_OP(x) IB_OPCODE_UC_##x
62
63 /* flags passed by hfi1_ib_rcv() */
64 enum {
65 HFI1_HAS_GRH = (1 << 0),
66 };
67
68 #define LRH_16B_BYTES (sizeof_field(struct hfi1_16b_header, lrh))
69 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
70 #define LRH_9B_BYTES (sizeof_field(struct ib_header, lrh))
71 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
72
73 /* 24Bits for qpn, upper 8Bits reserved */
74 struct opa_16b_mgmt {
75 __be32 dest_qpn;
76 __be32 src_qpn;
77 };
78
79 struct hfi1_16b_header {
80 u32 lrh[4];
81 union {
82 struct {
83 struct ib_grh grh;
84 struct ib_other_headers oth;
85 } l;
86 struct ib_other_headers oth;
87 struct opa_16b_mgmt mgmt;
88 } u;
89 } __packed;
90
91 struct hfi1_opa_header {
92 union {
93 struct ib_header ibh; /* 9B header */
94 struct hfi1_16b_header opah; /* 16B header */
95 };
96 u8 hdr_type; /* 9B or 16B */
97 } __packed;
98
99 struct hfi1_ahg_info {
100 u32 ahgdesc[2];
101 u16 tx_flags;
102 u8 ahgcount;
103 u8 ahgidx;
104 };
105
106 struct hfi1_sdma_header {
107 __le64 pbc;
108 struct hfi1_opa_header hdr;
109 } __packed;
110
111 /*
112 * hfi1 specific data structures that will be hidden from rvt after the queue
113 * pair is made common
114 */
115 struct hfi1_qp_priv {
116 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
117 struct sdma_engine *s_sde; /* current sde */
118 struct send_context *s_sendcontext; /* current sendcontext */
119 struct hfi1_ctxtdata *rcd; /* QP's receive context */
120 struct page **pages; /* for TID page scan */
121 u32 tid_enqueue; /* saved when tid waited */
122 u8 s_sc; /* SC[0..4] for next packet */
123 struct iowait s_iowait;
124 struct timer_list s_tid_timer; /* for timing tid wait */
125 struct timer_list s_tid_retry_timer; /* for timing tid ack */
126 struct list_head tid_wait; /* for queueing tid space */
127 struct hfi1_opfn_data opfn;
128 struct tid_flow_state flow_state;
129 struct tid_rdma_qp_params tid_rdma;
130 struct rvt_qp *owner;
131 u16 s_running_pkt_size;
132 u8 hdr_type; /* 9B or 16B */
133 struct rvt_sge_state tid_ss; /* SGE state pointer for 2nd leg */
134 atomic_t n_requests; /* # of TID RDMA requests in the */
135 /* queue */
136 atomic_t n_tid_requests; /* # of sent TID RDMA requests */
137 unsigned long tid_timer_timeout_jiffies;
138 unsigned long tid_retry_timeout_jiffies;
139
140 /* variables for the TID RDMA SE state machine */
141 u8 s_state;
142 u8 s_retry;
143 u8 rnr_nak_state; /* RNR NAK state */
144 u8 s_nak_state;
145 u32 s_nak_psn;
146 u32 s_flags;
147 u32 s_tid_cur;
148 u32 s_tid_head;
149 u32 s_tid_tail;
150 u32 r_tid_head; /* Most recently added TID RDMA request */
151 u32 r_tid_tail; /* the last completed TID RDMA request */
152 u32 r_tid_ack; /* the TID RDMA request to be ACK'ed */
153 u32 r_tid_alloc; /* Request for which we are allocating resources */
154 u32 pending_tid_w_segs; /* Num of pending tid write segments */
155 u32 pending_tid_w_resp; /* Num of pending tid write responses */
156 u32 alloc_w_segs; /* Number of segments for which write */
157 /* resources have been allocated for this QP */
158
159 /* For TID RDMA READ */
160 u32 tid_r_reqs; /* Num of tid reads requested */
161 u32 tid_r_comp; /* Num of tid reads completed */
162 u32 pending_tid_r_segs; /* Num of pending tid read segments */
163 u16 pkts_ps; /* packets per segment */
164 u8 timeout_shift; /* account for number of packets per segment */
165
166 u32 r_next_psn_kdeth;
167 u32 r_next_psn_kdeth_save;
168 u32 s_resync_psn;
169 u8 sync_pt; /* Set when QP reaches sync point */
170 u8 resync;
171 };
172
173 #define HFI1_QP_WQE_INVALID ((u32)-1)
174
175 struct hfi1_swqe_priv {
176 struct tid_rdma_request tid_req;
177 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */
178 };
179
180 struct hfi1_ack_priv {
181 struct rvt_sge_state ss; /* used for TID WRITE RESP */
182 struct tid_rdma_request tid_req;
183 };
184
185 /*
186 * This structure is used to hold commonly lookedup and computed values during
187 * the send engine progress.
188 */
189 struct iowait_work;
190 struct hfi1_pkt_state {
191 struct hfi1_ibdev *dev;
192 struct hfi1_ibport *ibp;
193 struct hfi1_pportdata *ppd;
194 struct verbs_txreq *s_txreq;
195 struct iowait_work *wait;
196 unsigned long flags;
197 unsigned long timeout;
198 unsigned long timeout_int;
199 int cpu;
200 u8 opcode;
201 bool in_thread;
202 bool pkts_sent;
203 };
204
205 #define HFI1_PSN_CREDIT 16
206
207 struct hfi1_opcode_stats {
208 u64 n_packets; /* number of packets */
209 u64 n_bytes; /* total number of bytes */
210 };
211
212 struct hfi1_opcode_stats_perctx {
213 struct hfi1_opcode_stats stats[256];
214 };
215
inc_opstats(u32 tlen,struct hfi1_opcode_stats * stats)216 static inline void inc_opstats(
217 u32 tlen,
218 struct hfi1_opcode_stats *stats)
219 {
220 #ifdef CONFIG_DEBUG_FS
221 stats->n_bytes += tlen;
222 stats->n_packets++;
223 #endif
224 }
225
226 struct hfi1_ibport {
227 struct rvt_qp __rcu *qp[2];
228 struct rvt_ibport rvp;
229
230 /* the first 16 entries are sl_to_vl for !OPA */
231 u8 sl_to_sc[32];
232 u8 sc_to_sl[32];
233 };
234
235 struct hfi1_ibdev {
236 struct rvt_dev_info rdi; /* Must be first */
237
238 /* QP numbers are shared by all IB ports */
239 /* protect txwait list */
240 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
241 struct list_head txwait; /* list for wait verbs_txreq */
242 struct list_head memwait; /* list for wait kernel memory */
243 struct kmem_cache *verbs_txreq_cache;
244 u64 n_txwait;
245 u64 n_kmem_wait;
246 u64 n_tidwait;
247
248 /* protect iowait lists */
249 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
250 u64 n_piowait;
251 u64 n_piodrain;
252 struct timer_list mem_timer;
253
254 #ifdef CONFIG_DEBUG_FS
255 /* per HFI debugfs */
256 struct dentry *hfi1_ibdev_dbg;
257 /* per HFI symlinks to above */
258 struct dentry *hfi1_ibdev_link;
259 #ifdef CONFIG_FAULT_INJECTION
260 struct fault *fault;
261 #endif
262 #endif
263 };
264
to_idev(struct ib_device * ibdev)265 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
266 {
267 struct rvt_dev_info *rdi;
268
269 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
270 return container_of(rdi, struct hfi1_ibdev, rdi);
271 }
272
iowait_to_qp(struct iowait * s_iowait)273 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
274 {
275 struct hfi1_qp_priv *priv;
276
277 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
278 return priv->owner;
279 }
280
281 /*
282 * This must be called with s_lock held.
283 */
284 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
285 u32 qp1, u32 qp2, u32 lid1, u32 lid2);
286 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num);
287 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
288 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
289 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u32 port,
290 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
291 const struct ib_mad *in_mad, struct ib_mad *out_mad,
292 size_t *out_mad_size, u16 *out_mad_pkey_index);
293
294 /*
295 * The PSN_MASK and PSN_SHIFT allow for
296 * 1) comparing two PSNs
297 * 2) returning the PSN with any upper bits masked
298 * 3) returning the difference between to PSNs
299 *
300 * The number of significant bits in the PSN must
301 * necessarily be at least one bit less than
302 * the container holding the PSN.
303 */
304 #define PSN_MASK 0x7FFFFFFF
305 #define PSN_SHIFT 1
306 #define PSN_MODIFY_MASK 0xFFFFFF
307
308 /*
309 * Compare two PSNs
310 * Returns an integer <, ==, or > than zero.
311 */
cmp_psn(u32 a,u32 b)312 static inline int cmp_psn(u32 a, u32 b)
313 {
314 return (((int)a) - ((int)b)) << PSN_SHIFT;
315 }
316
317 /*
318 * Return masked PSN
319 */
mask_psn(u32 a)320 static inline u32 mask_psn(u32 a)
321 {
322 return a & PSN_MASK;
323 }
324
325 /*
326 * Return delta between two PSNs
327 */
delta_psn(u32 a,u32 b)328 static inline u32 delta_psn(u32 a, u32 b)
329 {
330 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
331 }
332
wqe_to_tid_req(struct rvt_swqe * wqe)333 static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
334 {
335 return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
336 }
337
ack_to_tid_req(struct rvt_ack_entry * e)338 static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
339 {
340 return &((struct hfi1_ack_priv *)e->priv)->tid_req;
341 }
342
343 /*
344 * Look through all the active flows for a TID RDMA request and find
345 * the one (if it exists) that contains the specified PSN.
346 */
__full_flow_psn(struct flow_state * state,u32 psn)347 static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
348 {
349 return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
350 (psn & HFI1_KDETH_BTH_SEQ_MASK));
351 }
352
full_flow_psn(struct tid_rdma_flow * flow,u32 psn)353 static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
354 {
355 return __full_flow_psn(&flow->flow_state, psn);
356 }
357
358 struct verbs_txreq;
359 void hfi1_put_txreq(struct verbs_txreq *tx);
360
361 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
362
363 void hfi1_cnp_rcv(struct hfi1_packet *packet);
364
365 void hfi1_uc_rcv(struct hfi1_packet *packet);
366
367 void hfi1_rc_rcv(struct hfi1_packet *packet);
368
369 void hfi1_rc_hdrerr(
370 struct hfi1_ctxtdata *rcd,
371 struct hfi1_packet *packet,
372 struct rvt_qp *qp);
373
374 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
375
376 void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);
377 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
378
379 void hfi1_ud_rcv(struct hfi1_packet *packet);
380
381 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
382
383 void hfi1_migrate_qp(struct rvt_qp *qp);
384
385 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
386 int attr_mask, struct ib_udata *udata);
387
388 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
389 int attr_mask, struct ib_udata *udata);
390 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
391 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
392 bool *call_send);
393
394 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
395
396 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
397 const struct ib_global_route *grh, u32 hwords, u32 nwords);
398
399 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
400 u32 bth0, u32 bth1, u32 bth2, int middle,
401 struct hfi1_pkt_state *ps);
402
403 bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
404 bool tid);
405
406 void _hfi1_do_send(struct work_struct *work);
407
408 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
409
410 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
411
412 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
413
414 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
415
416 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
417
418 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
419
420 int hfi1_register_ib_device(struct hfi1_devdata *);
421
422 void hfi1_unregister_ib_device(struct hfi1_devdata *);
423
424 void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
425
426 void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
427
428 void hfi1_ib_rcv(struct hfi1_packet *packet);
429
430 void hfi1_16B_rcv(struct hfi1_packet *packet);
431
432 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
433
434 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
435 u64 pbc);
436
437 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
438 u64 pbc);
439
opa_bth_is_migration(struct ib_other_headers * ohdr)440 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
441 {
442 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
443 }
444
445 void hfi1_wait_kmem(struct rvt_qp *qp);
446
hfi1_trdma_send_complete(struct rvt_qp * qp,struct rvt_swqe * wqe,enum ib_wc_status status)447 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
448 struct rvt_swqe *wqe,
449 enum ib_wc_status status)
450 {
451 trdma_clean_swqe(qp, wqe);
452 rvt_send_complete(qp, wqe, status);
453 }
454
455 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
456
457 extern const u8 hdr_len_by_opcode[];
458
459 extern const int ib_rvt_state_ops[];
460
461 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
462
463 extern unsigned int hfi1_max_cqes;
464
465 extern unsigned int hfi1_max_cqs;
466
467 extern unsigned int hfi1_max_qp_wrs;
468
469 extern unsigned int hfi1_max_qps;
470
471 extern unsigned int hfi1_max_sges;
472
473 extern unsigned int hfi1_max_mcast_grps;
474
475 extern unsigned int hfi1_max_mcast_qp_attached;
476
477 extern unsigned int hfi1_max_srqs;
478
479 extern unsigned int hfi1_max_srq_sges;
480
481 extern unsigned int hfi1_max_srq_wrs;
482
483 extern unsigned short piothreshold;
484
485 extern const u32 ib_hfi1_rnr_table[];
486
487 #endif /* HFI1_VERBS_H */
488