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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
26struct hfi1_ctxtdata;
27struct hfi1_pportdata;
28struct hfi1_devdata;
29struct 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() */
64enum {
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 */
74struct opa_16b_mgmt {
75 __be32 dest_qpn;
76 __be32 src_qpn;
77};
78
79struct 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
91struct 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
99struct hfi1_ahg_info {
100 u32 ahgdesc[2];
101 u16 tx_flags;
102 u8 ahgcount;
103 u8 ahgidx;
104};
105
106struct 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 */
115struct 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
175struct hfi1_swqe_priv {
176 struct tid_rdma_request tid_req;
177 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */
178};
179
180struct 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 */
189struct iowait_work;
190struct 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
207struct hfi1_opcode_stats {
208 u64 n_packets; /* number of packets */
209 u64 n_bytes; /* total number of bytes */
210};
211
212struct hfi1_opcode_stats_perctx {
213 struct hfi1_opcode_stats stats[256];
214};
215
216static 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
226struct 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
235struct 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
265static 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
273static 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 */
284void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
285 u32 qp1, u32 qp2, u32 lid1, u32 lid2);
286void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num);
287void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
288void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
289int 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 */
312static 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 */
320static inline u32 mask_psn(u32 a)
321{
322 return a & PSN_MASK;
323}
324
325/*
326 * Return delta between two PSNs
327 */
328static inline u32 delta_psn(u32 a, u32 b)
329{
330 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
331}
332
333static 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
338static 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 */
347static 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
353static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)
354{
355 return __full_flow_psn(&flow->flow_state, psn);
356}
357
358struct verbs_txreq;
359void hfi1_put_txreq(struct verbs_txreq *tx);
360
361int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
362
363void hfi1_cnp_rcv(struct hfi1_packet *packet);
364
365void hfi1_uc_rcv(struct hfi1_packet *packet);
366
367void hfi1_rc_rcv(struct hfi1_packet *packet);
368
369void hfi1_rc_hdrerr(
370 struct hfi1_ctxtdata *rcd,
371 struct hfi1_packet *packet,
372 struct rvt_qp *qp);
373
374u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
375
376void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);
377void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
378
379void hfi1_ud_rcv(struct hfi1_packet *packet);
380
381int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
382
383void hfi1_migrate_qp(struct rvt_qp *qp);
384
385int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
386 int attr_mask, struct ib_udata *udata);
387
388void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
389 int attr_mask, struct ib_udata *udata);
390void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
391int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
392 bool *call_send);
393
394int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
395
396u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
397 const struct ib_global_route *grh, u32 hwords, u32 nwords);
398
399void 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
403bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
404 bool tid);
405
406void _hfi1_do_send(struct work_struct *work);
407
408void hfi1_do_send_from_rvt(struct rvt_qp *qp);
409
410void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
411
412void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
413
414int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
415
416int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
417
418int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
419
420int hfi1_register_ib_device(struct hfi1_devdata *);
421
422void hfi1_unregister_ib_device(struct hfi1_devdata *);
423
424void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);
425
426void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);
427
428void hfi1_ib_rcv(struct hfi1_packet *packet);
429
430void hfi1_16B_rcv(struct hfi1_packet *packet);
431
432unsigned hfi1_get_npkeys(struct hfi1_devdata *);
433
434int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
435 u64 pbc);
436
437int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
438 u64 pbc);
439
440static 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
445void hfi1_wait_kmem(struct rvt_qp *qp);
446
447static 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
455extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
456
457extern const u8 hdr_len_by_opcode[];
458
459extern const int ib_rvt_state_ops[];
460
461extern __be64 ib_hfi1_sys_image_guid; /* in network order */
462
463extern unsigned int hfi1_max_cqes;
464
465extern unsigned int hfi1_max_cqs;
466
467extern unsigned int hfi1_max_qp_wrs;
468
469extern unsigned int hfi1_max_qps;
470
471extern unsigned int hfi1_max_sges;
472
473extern unsigned int hfi1_max_mcast_grps;
474
475extern unsigned int hfi1_max_mcast_qp_attached;
476
477extern unsigned int hfi1_max_srqs;
478
479extern unsigned int hfi1_max_srq_sges;
480
481extern unsigned int hfi1_max_srq_wrs;
482
483extern unsigned short piothreshold;
484
485extern const u32 ib_hfi1_rnr_table[];
486
487#endif /* HFI1_VERBS_H */
1/*
2 * Copyright(c) 2015, 2016 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
68struct hfi1_ctxtdata;
69struct hfi1_pportdata;
70struct hfi1_devdata;
71struct hfi1_packet;
72
73#include "iowait.h"
74
75#define HFI1_MAX_RDMA_ATOMIC 16
76
77/*
78 * Increment this value if any changes that break userspace ABI
79 * compatibility are made.
80 */
81#define HFI1_UVERBS_ABI_VERSION 2
82
83/* IB Performance Manager status values */
84#define IB_PMA_SAMPLE_STATUS_DONE 0x00
85#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
86#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
87
88/* Mandatory IB performance counter select values. */
89#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
90#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
91#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
92#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
93#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
94
95#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
96
97#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
98
99#define RC_OP(x) IB_OPCODE_RC_##x
100#define UC_OP(x) IB_OPCODE_UC_##x
101
102/* flags passed by hfi1_ib_rcv() */
103enum {
104 HFI1_HAS_GRH = (1 << 0),
105};
106
107struct hfi1_ahg_info {
108 u32 ahgdesc[2];
109 u16 tx_flags;
110 u8 ahgcount;
111 u8 ahgidx;
112};
113
114struct hfi1_sdma_header {
115 __le64 pbc;
116 struct ib_header hdr;
117} __packed;
118
119/*
120 * hfi1 specific data structures that will be hidden from rvt after the queue
121 * pair is made common
122 */
123struct hfi1_qp_priv {
124 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
125 struct sdma_engine *s_sde; /* current sde */
126 struct send_context *s_sendcontext; /* current sendcontext */
127 u8 s_sc; /* SC[0..4] for next packet */
128 u8 r_adefered; /* number of acks defered */
129 struct iowait s_iowait;
130 struct timer_list s_rnr_timer;
131 struct rvt_qp *owner;
132};
133
134/*
135 * This structure is used to hold commonly lookedup and computed values during
136 * the send engine progress.
137 */
138struct hfi1_pkt_state {
139 struct hfi1_ibdev *dev;
140 struct hfi1_ibport *ibp;
141 struct hfi1_pportdata *ppd;
142 struct verbs_txreq *s_txreq;
143 unsigned long flags;
144};
145
146#define HFI1_PSN_CREDIT 16
147
148struct hfi1_opcode_stats {
149 u64 n_packets; /* number of packets */
150 u64 n_bytes; /* total number of bytes */
151};
152
153struct hfi1_opcode_stats_perctx {
154 struct hfi1_opcode_stats stats[256];
155};
156
157static inline void inc_opstats(
158 u32 tlen,
159 struct hfi1_opcode_stats *stats)
160{
161#ifdef CONFIG_DEBUG_FS
162 stats->n_bytes += tlen;
163 stats->n_packets++;
164#endif
165}
166
167struct hfi1_ibport {
168 struct rvt_qp __rcu *qp[2];
169 struct rvt_ibport rvp;
170
171 /* the first 16 entries are sl_to_vl for !OPA */
172 u8 sl_to_sc[32];
173 u8 sc_to_sl[32];
174};
175
176struct hfi1_ibdev {
177 struct rvt_dev_info rdi; /* Must be first */
178
179 /* QP numbers are shared by all IB ports */
180 /* protect txwait list */
181 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
182 struct list_head txwait; /* list for wait verbs_txreq */
183 struct list_head memwait; /* list for wait kernel memory */
184 struct kmem_cache *verbs_txreq_cache;
185 u64 n_txwait;
186 u64 n_kmem_wait;
187
188 /* protect iowait lists */
189 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
190 u64 n_piowait;
191 u64 n_piodrain;
192 struct timer_list mem_timer;
193
194#ifdef CONFIG_DEBUG_FS
195 /* per HFI debugfs */
196 struct dentry *hfi1_ibdev_dbg;
197 /* per HFI symlinks to above */
198 struct dentry *hfi1_ibdev_link;
199#endif
200};
201
202static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
203{
204 struct rvt_dev_info *rdi;
205
206 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
207 return container_of(rdi, struct hfi1_ibdev, rdi);
208}
209
210static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
211{
212 struct hfi1_qp_priv *priv;
213
214 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
215 return priv->owner;
216}
217
218/*
219 * Send if not busy or waiting for I/O and either
220 * a RC response is pending or we can process send work requests.
221 */
222static inline int hfi1_send_ok(struct rvt_qp *qp)
223{
224 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
225 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
226 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
227}
228
229/*
230 * This must be called with s_lock held.
231 */
232void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
233 u32 qp1, u32 qp2, u16 lid1, u16 lid2);
234void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
235void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
236void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
237int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
238 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
239 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
240 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
241 u16 *out_mad_pkey_index);
242
243/*
244 * The PSN_MASK and PSN_SHIFT allow for
245 * 1) comparing two PSNs
246 * 2) returning the PSN with any upper bits masked
247 * 3) returning the difference between to PSNs
248 *
249 * The number of significant bits in the PSN must
250 * necessarily be at least one bit less than
251 * the container holding the PSN.
252 */
253#ifndef CONFIG_HFI1_VERBS_31BIT_PSN
254#define PSN_MASK 0xFFFFFF
255#define PSN_SHIFT 8
256#else
257#define PSN_MASK 0x7FFFFFFF
258#define PSN_SHIFT 1
259#endif
260#define PSN_MODIFY_MASK 0xFFFFFF
261
262/*
263 * Compare the lower 24 bits of the msn values.
264 * Returns an integer <, ==, or > than zero.
265 */
266static inline int cmp_msn(u32 a, u32 b)
267{
268 return (((int)a) - ((int)b)) << 8;
269}
270
271/*
272 * Compare two PSNs
273 * Returns an integer <, ==, or > than zero.
274 */
275static inline int cmp_psn(u32 a, u32 b)
276{
277 return (((int)a) - ((int)b)) << PSN_SHIFT;
278}
279
280/*
281 * Return masked PSN
282 */
283static inline u32 mask_psn(u32 a)
284{
285 return a & PSN_MASK;
286}
287
288/*
289 * Return delta between two PSNs
290 */
291static inline u32 delta_psn(u32 a, u32 b)
292{
293 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
294}
295
296struct verbs_txreq;
297void hfi1_put_txreq(struct verbs_txreq *tx);
298
299int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
300
301void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
302 int release, int copy_last);
303
304void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release);
305
306void hfi1_cnp_rcv(struct hfi1_packet *packet);
307
308void hfi1_uc_rcv(struct hfi1_packet *packet);
309
310void hfi1_rc_rcv(struct hfi1_packet *packet);
311
312void hfi1_rc_hdrerr(
313 struct hfi1_ctxtdata *rcd,
314 struct ib_header *hdr,
315 u32 rcv_flags,
316 struct rvt_qp *qp);
317
318u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
319
320struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
321
322void hfi1_rc_rnr_retry(unsigned long arg);
323void hfi1_add_rnr_timer(struct rvt_qp *qp, u32 to);
324void hfi1_rc_timeout(unsigned long arg);
325void hfi1_del_timers_sync(struct rvt_qp *qp);
326void hfi1_stop_rc_timers(struct rvt_qp *qp);
327
328void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
329
330void hfi1_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
331
332void hfi1_ud_rcv(struct hfi1_packet *packet);
333
334int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
335
336int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
337
338void hfi1_migrate_qp(struct rvt_qp *qp);
339
340int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
341 int attr_mask, struct ib_udata *udata);
342
343void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
344 int attr_mask, struct ib_udata *udata);
345
346int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
347
348extern const u32 rc_only_opcode;
349extern const u32 uc_only_opcode;
350
351static inline u8 get_opcode(struct ib_header *h)
352{
353 u16 lnh = be16_to_cpu(h->lrh[0]) & 3;
354
355 if (lnh == IB_LNH_IBA_LOCAL)
356 return be32_to_cpu(h->u.oth.bth[0]) >> 24;
357 else
358 return be32_to_cpu(h->u.l.oth.bth[0]) >> 24;
359}
360
361int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr,
362 int has_grh, struct rvt_qp *qp, u32 bth0);
363
364u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
365 struct ib_global_route *grh, u32 hwords, u32 nwords);
366
367void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
368 u32 bth0, u32 bth2, int middle,
369 struct hfi1_pkt_state *ps);
370
371void _hfi1_do_send(struct work_struct *work);
372
373void hfi1_do_send(struct rvt_qp *qp);
374
375void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
376 enum ib_wc_status status);
377
378void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn);
379
380int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
381
382int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
383
384int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
385
386int hfi1_register_ib_device(struct hfi1_devdata *);
387
388void hfi1_unregister_ib_device(struct hfi1_devdata *);
389
390void hfi1_ib_rcv(struct hfi1_packet *packet);
391
392unsigned hfi1_get_npkeys(struct hfi1_devdata *);
393
394int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
395 u64 pbc);
396
397int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
398 u64 pbc);
399
400int hfi1_wss_init(void);
401void hfi1_wss_exit(void);
402
403/* platform specific: return the lowest level cache (llc) size, in KiB */
404static inline int wss_llc_size(void)
405{
406 /* assume that the boot CPU value is universal for all CPUs */
407 return boot_cpu_data.x86_cache_size;
408}
409
410/* platform specific: cacheless copy */
411static inline void cacheless_memcpy(void *dst, void *src, size_t n)
412{
413 /*
414 * Use the only available X64 cacheless copy. Add a __user cast
415 * to quiet sparse. The src agument is already in the kernel so
416 * there are no security issues. The extra fault recovery machinery
417 * is not invoked.
418 */
419 __copy_user_nocache(dst, (void __user *)src, n, 0);
420}
421
422extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
423
424extern const u8 hdr_len_by_opcode[];
425
426extern const int ib_rvt_state_ops[];
427
428extern __be64 ib_hfi1_sys_image_guid; /* in network order */
429
430extern unsigned int hfi1_max_cqes;
431
432extern unsigned int hfi1_max_cqs;
433
434extern unsigned int hfi1_max_qp_wrs;
435
436extern unsigned int hfi1_max_qps;
437
438extern unsigned int hfi1_max_sges;
439
440extern unsigned int hfi1_max_mcast_grps;
441
442extern unsigned int hfi1_max_mcast_qp_attached;
443
444extern unsigned int hfi1_max_srqs;
445
446extern unsigned int hfi1_max_srq_sges;
447
448extern unsigned int hfi1_max_srq_wrs;
449
450extern unsigned short piothreshold;
451
452extern const u32 ib_hfi1_rnr_table[];
453
454#endif /* HFI1_VERBS_H */