1 /*
2 * Copyright(c) 2015 - 2018 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef HFI1_VERBS_H
49 #define HFI1_VERBS_H
50
51 #include <linux/types.h>
52 #include <linux/seqlock.h>
53 #include <linux/kernel.h>
54 #include <linux/interrupt.h>
55 #include <linux/kref.h>
56 #include <linux/workqueue.h>
57 #include <linux/kthread.h>
58 #include <linux/completion.h>
59 #include <linux/slab.h>
60 #include <rdma/ib_pack.h>
61 #include <rdma/ib_user_verbs.h>
62 #include <rdma/ib_mad.h>
63 #include <rdma/ib_hdrs.h>
64 #include <rdma/rdma_vt.h>
65 #include <rdma/rdmavt_qp.h>
66 #include <rdma/rdmavt_cq.h>
67
68 struct hfi1_ctxtdata;
69 struct hfi1_pportdata;
70 struct hfi1_devdata;
71 struct hfi1_packet;
72
73 #include "iowait.h"
74 #include "tid_rdma.h"
75 #include "opfn.h"
76
77 #define HFI1_MAX_RDMA_ATOMIC 16
78
79 /*
80 * Increment this value if any changes that break userspace ABI
81 * compatibility are made.
82 */
83 #define HFI1_UVERBS_ABI_VERSION 2
84
85 /* IB Performance Manager status values */
86 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
87 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
88 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
89
90 /* Mandatory IB performance counter select values. */
91 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
92 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
93 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
94 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
95 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
96
97 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
98
99 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
100 #define OPA_BTH_MIG_REQ BIT(31)
101
102 #define RC_OP(x) IB_OPCODE_RC_##x
103 #define UC_OP(x) IB_OPCODE_UC_##x
104
105 /* flags passed by hfi1_ib_rcv() */
106 enum {
107 HFI1_HAS_GRH = (1 << 0),
108 };
109
110 #define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
111 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
112 #define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
113 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
114
115 /* 24Bits for qpn, upper 8Bits reserved */
116 struct opa_16b_mgmt {
117 __be32 dest_qpn;
118 __be32 src_qpn;
119 };
120
121 struct hfi1_16b_header {
122 u32 lrh[4];
123 union {
124 struct {
125 struct ib_grh grh;
126 struct ib_other_headers oth;
127 } l;
128 struct ib_other_headers oth;
129 struct opa_16b_mgmt mgmt;
130 } u;
131 } __packed;
132
133 struct hfi1_opa_header {
134 union {
135 struct ib_header ibh; /* 9B header */
136 struct hfi1_16b_header opah; /* 16B header */
137 };
138 u8 hdr_type; /* 9B or 16B */
139 } __packed;
140
141 struct hfi1_ahg_info {
142 u32 ahgdesc[2];
143 u16 tx_flags;
144 u8 ahgcount;
145 u8 ahgidx;
146 };
147
148 struct hfi1_sdma_header {
149 __le64 pbc;
150 struct hfi1_opa_header hdr;
151 } __packed;
152
153 /*
154 * hfi1 specific data structures that will be hidden from rvt after the queue
155 * pair is made common
156 */
157 struct hfi1_qp_priv {
158 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
159 struct sdma_engine *s_sde; /* current sde */
160 struct send_context *s_sendcontext; /* current sendcontext */
161 struct hfi1_ctxtdata *rcd; /* QP's receive context */
162 struct page **pages; /* for TID page scan */
163 u32 tid_enqueue; /* saved when tid waited */
164 u8 s_sc; /* SC[0..4] for next packet */
165 struct iowait s_iowait;
166 struct timer_list s_tid_timer; /* for timing tid wait */
167 struct timer_list s_tid_retry_timer; /* for timing tid ack */
168 struct list_head tid_wait; /* for queueing tid space */
169 struct hfi1_opfn_data opfn;
170 struct tid_flow_state flow_state;
171 struct tid_rdma_qp_params tid_rdma;
172 struct rvt_qp *owner;
173 u16 s_running_pkt_size;
174 u8 hdr_type; /* 9B or 16B */
175 struct rvt_sge_state tid_ss; /* SGE state pointer for 2nd leg */
176 atomic_t n_requests; /* # of TID RDMA requests in the */
177 /* queue */
178 atomic_t n_tid_requests; /* # of sent TID RDMA requests */
179 unsigned long tid_timer_timeout_jiffies;
180 unsigned long tid_retry_timeout_jiffies;
181
182 /* variables for the TID RDMA SE state machine */
183 u8 s_state;
184 u8 s_retry;
185 u8 rnr_nak_state; /* RNR NAK state */
186 u8 s_nak_state;
187 u32 s_nak_psn;
188 u32 s_flags;
189 u32 s_tid_cur;
190 u32 s_tid_head;
191 u32 s_tid_tail;
192 u32 r_tid_head; /* Most recently added TID RDMA request */
193 u32 r_tid_tail; /* the last completed TID RDMA request */
194 u32 r_tid_ack; /* the TID RDMA request to be ACK'ed */
195 u32 r_tid_alloc; /* Request for which we are allocating resources */
196 u32 pending_tid_w_segs; /* Num of pending tid write segments */
197 u32 pending_tid_w_resp; /* Num of pending tid write responses */
198 u32 alloc_w_segs; /* Number of segments for which write */
199 /* resources have been allocated for this QP */
200
201 /* For TID RDMA READ */
202 u32 tid_r_reqs; /* Num of tid reads requested */
203 u32 tid_r_comp; /* Num of tid reads completed */
204 u32 pending_tid_r_segs; /* Num of pending tid read segments */
205 u16 pkts_ps; /* packets per segment */
206 u8 timeout_shift; /* account for number of packets per segment */
207
208 u32 r_next_psn_kdeth;
209 u32 r_next_psn_kdeth_save;
210 u32 s_resync_psn;
211 u8 sync_pt; /* Set when QP reaches sync point */
212 u8 resync;
213 };
214
215 #define HFI1_QP_WQE_INVALID ((u32)-1)
216
217 struct hfi1_swqe_priv {
218 struct tid_rdma_request tid_req;
219 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */
220 };
221
222 struct hfi1_ack_priv {
223 struct rvt_sge_state ss; /* used for TID WRITE RESP */
224 struct tid_rdma_request tid_req;
225 };
226
227 /*
228 * This structure is used to hold commonly lookedup and computed values during
229 * the send engine progress.
230 */
231 struct iowait_work;
232 struct hfi1_pkt_state {
233 struct hfi1_ibdev *dev;
234 struct hfi1_ibport *ibp;
235 struct hfi1_pportdata *ppd;
236 struct verbs_txreq *s_txreq;
237 struct iowait_work *wait;
238 unsigned long flags;
239 unsigned long timeout;
240 unsigned long timeout_int;
241 int cpu;
242 u8 opcode;
243 bool in_thread;
244 bool pkts_sent;
245 };
246
247 #define HFI1_PSN_CREDIT 16
248
249 struct hfi1_opcode_stats {
250 u64 n_packets; /* number of packets */
251 u64 n_bytes; /* total number of bytes */
252 };
253
254 struct hfi1_opcode_stats_perctx {
255 struct hfi1_opcode_stats stats[256];
256 };
257
inc_opstats(u32 tlen,struct hfi1_opcode_stats * stats)258 static inline void inc_opstats(
259 u32 tlen,
260 struct hfi1_opcode_stats *stats)
261 {
262 #ifdef CONFIG_DEBUG_FS
263 stats->n_bytes += tlen;
264 stats->n_packets++;
265 #endif
266 }
267
268 struct hfi1_ibport {
269 struct rvt_qp __rcu *qp[2];
270 struct rvt_ibport rvp;
271
272 /* the first 16 entries are sl_to_vl for !OPA */
273 u8 sl_to_sc[32];
274 u8 sc_to_sl[32];
275 };
276
277 struct hfi1_ibdev {
278 struct rvt_dev_info rdi; /* Must be first */
279
280 /* QP numbers are shared by all IB ports */
281 /* protect txwait list */
282 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
283 struct list_head txwait; /* list for wait verbs_txreq */
284 struct list_head memwait; /* list for wait kernel memory */
285 struct kmem_cache *verbs_txreq_cache;
286 u64 n_txwait;
287 u64 n_kmem_wait;
288 u64 n_tidwait;
289
290 /* protect iowait lists */
291 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
292 u64 n_piowait;
293 u64 n_piodrain;
294 struct timer_list mem_timer;
295
296 #ifdef CONFIG_DEBUG_FS
297 /* per HFI debugfs */
298 struct dentry *hfi1_ibdev_dbg;
299 /* per HFI symlinks to above */
300 struct dentry *hfi1_ibdev_link;
301 #ifdef CONFIG_FAULT_INJECTION
302 struct fault *fault;
303 #endif
304 #endif
305 };
306
to_idev(struct ib_device * ibdev)307 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
308 {
309 struct rvt_dev_info *rdi;
310
311 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
312 return container_of(rdi, struct hfi1_ibdev, rdi);
313 }
314
iowait_to_qp(struct iowait * s_iowait)315 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
316 {
317 struct hfi1_qp_priv *priv;
318
319 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
320 return priv->owner;
321 }
322
323 /*
324 * This must be called with s_lock held.
325 */
326 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
327 u32 qp1, u32 qp2, u32 lid1, u32 lid2);
328 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
329 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
330 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
331 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
332 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
333 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
334 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
335 u16 *out_mad_pkey_index);
336
337 /*
338 * The PSN_MASK and PSN_SHIFT allow for
339 * 1) comparing two PSNs
340 * 2) returning the PSN with any upper bits masked
341 * 3) returning the difference between to PSNs
342 *
343 * The number of significant bits in the PSN must
344 * necessarily be at least one bit less than
345 * the container holding the PSN.
346 */
347 #define PSN_MASK 0x7FFFFFFF
348 #define PSN_SHIFT 1
349 #define PSN_MODIFY_MASK 0xFFFFFF
350
351 /*
352 * Compare two PSNs
353 * Returns an integer <, ==, or > than zero.
354 */
cmp_psn(u32 a,u32 b)355 static inline int cmp_psn(u32 a, u32 b)
356 {
357 return (((int)a) - ((int)b)) << PSN_SHIFT;
358 }
359
360 /*
361 * Return masked PSN
362 */
mask_psn(u32 a)363 static inline u32 mask_psn(u32 a)
364 {
365 return a & PSN_MASK;
366 }
367
368 /*
369 * Return delta between two PSNs
370 */
delta_psn(u32 a,u32 b)371 static inline u32 delta_psn(u32 a, u32 b)
372 {
373 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
374 }
375
wqe_to_tid_req(struct rvt_swqe * wqe)376 static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)
377 {
378 return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;
379 }
380
ack_to_tid_req(struct rvt_ack_entry * e)381 static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)
382 {
383 return &((struct hfi1_ack_priv *)e->priv)->tid_req;
384 }
385
386 /*
387 * Look through all the active flows for a TID RDMA request and find
388 * the one (if it exists) that contains the specified PSN.
389 */
__full_flow_psn(struct flow_state * state,u32 psn)390 static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)
391 {
392 return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |
393 (psn & HFI1_KDETH_BTH_SEQ_MASK));
394 }
395
full_flow_psn(struct tid_rdma_flow * flow,u32 psn)396 static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
397 {
398 return __full_flow_psn(&flow->flow_state, psn);
399 }
400
401 struct verbs_txreq;
402 void hfi1_put_txreq(struct verbs_txreq *tx);
403
404 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
405
406 void hfi1_cnp_rcv(struct hfi1_packet *packet);
407
408 void hfi1_uc_rcv(struct hfi1_packet *packet);
409
410 void hfi1_rc_rcv(struct hfi1_packet *packet);
411
412 void hfi1_rc_hdrerr(
413 struct hfi1_ctxtdata *rcd,
414 struct hfi1_packet *packet,
415 struct rvt_qp *qp);
416
417 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
418
419 void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);
420 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
421
422 void hfi1_ud_rcv(struct hfi1_packet *packet);
423
424 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
425
426 void hfi1_migrate_qp(struct rvt_qp *qp);
427
428 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
429 int attr_mask, struct ib_udata *udata);
430
431 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
432 int attr_mask, struct ib_udata *udata);
433 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
434 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
435 bool *call_send);
436
437 extern const u32 rc_only_opcode;
438 extern const u32 uc_only_opcode;
439
440 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
441
442 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
443 const struct ib_global_route *grh, u32 hwords, u32 nwords);
444
445 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
446 u32 bth0, u32 bth1, u32 bth2, int middle,
447 struct hfi1_pkt_state *ps);
448
449 bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
450 bool tid);
451
452 void _hfi1_do_send(struct work_struct *work);
453
454 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
455
456 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
457
458 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
459
460 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
461
462 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
463
464 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
465
466 int hfi1_register_ib_device(struct hfi1_devdata *);
467
468 void hfi1_unregister_ib_device(struct hfi1_devdata *);
469
470 void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
471
472 void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
473
474 void hfi1_ib_rcv(struct hfi1_packet *packet);
475
476 void hfi1_16B_rcv(struct hfi1_packet *packet);
477
478 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
479
480 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
481 u64 pbc);
482
483 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
484 u64 pbc);
485
opa_bth_is_migration(struct ib_other_headers * ohdr)486 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
487 {
488 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
489 }
490
491 void hfi1_wait_kmem(struct rvt_qp *qp);
492
hfi1_trdma_send_complete(struct rvt_qp * qp,struct rvt_swqe * wqe,enum ib_wc_status status)493 static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,
494 struct rvt_swqe *wqe,
495 enum ib_wc_status status)
496 {
497 trdma_clean_swqe(qp, wqe);
498 rvt_send_complete(qp, wqe, status);
499 }
500
501 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
502
503 extern const u8 hdr_len_by_opcode[];
504
505 extern const int ib_rvt_state_ops[];
506
507 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
508
509 extern unsigned int hfi1_max_cqes;
510
511 extern unsigned int hfi1_max_cqs;
512
513 extern unsigned int hfi1_max_qp_wrs;
514
515 extern unsigned int hfi1_max_qps;
516
517 extern unsigned int hfi1_max_sges;
518
519 extern unsigned int hfi1_max_mcast_grps;
520
521 extern unsigned int hfi1_max_mcast_qp_attached;
522
523 extern unsigned int hfi1_max_srqs;
524
525 extern unsigned int hfi1_max_srq_sges;
526
527 extern unsigned int hfi1_max_srq_wrs;
528
529 extern unsigned short piothreshold;
530
531 extern const u32 ib_hfi1_rnr_table[];
532
533 #endif /* HFI1_VERBS_H */
534
