1 /*
2 * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
3 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #ifndef IPATH_VERBS_H
35 #define IPATH_VERBS_H
36
37 #include <linux/types.h>
38 #include <linux/spinlock.h>
39 #include <linux/kernel.h>
40 #include <linux/interrupt.h>
41 #include <linux/kref.h>
42 #include <rdma/ib_pack.h>
43 #include <rdma/ib_user_verbs.h>
44
45 #include "ipath_kernel.h"
46
47 #define IPATH_MAX_RDMA_ATOMIC 4
48
49 #define QPN_MAX (1 << 24)
50 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
51
52 /*
53 * Increment this value if any changes that break userspace ABI
54 * compatibility are made.
55 */
56 #define IPATH_UVERBS_ABI_VERSION 2
57
58 /*
59 * Define an ib_cq_notify value that is not valid so we know when CQ
60 * notifications are armed.
61 */
62 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
63
64 /* AETH NAK opcode values */
65 #define IB_RNR_NAK 0x20
66 #define IB_NAK_PSN_ERROR 0x60
67 #define IB_NAK_INVALID_REQUEST 0x61
68 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
69 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
70 #define IB_NAK_INVALID_RD_REQUEST 0x64
71
72 /* Flags for checking QP state (see ib_ipath_state_ops[]) */
73 #define IPATH_POST_SEND_OK 0x01
74 #define IPATH_POST_RECV_OK 0x02
75 #define IPATH_PROCESS_RECV_OK 0x04
76 #define IPATH_PROCESS_SEND_OK 0x08
77 #define IPATH_PROCESS_NEXT_SEND_OK 0x10
78 #define IPATH_FLUSH_SEND 0x20
79 #define IPATH_FLUSH_RECV 0x40
80 #define IPATH_PROCESS_OR_FLUSH_SEND \
81 (IPATH_PROCESS_SEND_OK | IPATH_FLUSH_SEND)
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 struct ib_reth {
96 __be64 vaddr;
97 __be32 rkey;
98 __be32 length;
99 } __attribute__ ((packed));
100
101 struct ib_atomic_eth {
102 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
103 __be32 rkey;
104 __be64 swap_data;
105 __be64 compare_data;
106 } __attribute__ ((packed));
107
108 struct ipath_other_headers {
109 __be32 bth[3];
110 union {
111 struct {
112 __be32 deth[2];
113 __be32 imm_data;
114 } ud;
115 struct {
116 struct ib_reth reth;
117 __be32 imm_data;
118 } rc;
119 struct {
120 __be32 aeth;
121 __be32 atomic_ack_eth[2];
122 } at;
123 __be32 imm_data;
124 __be32 aeth;
125 struct ib_atomic_eth atomic_eth;
126 } u;
127 } __attribute__ ((packed));
128
129 /*
130 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
131 * long (72 w/ imm_data). Only the first 56 bytes of the IB header
132 * will be in the eager header buffer. The remaining 12 or 16 bytes
133 * are in the data buffer.
134 */
135 struct ipath_ib_header {
136 __be16 lrh[4];
137 union {
138 struct {
139 struct ib_grh grh;
140 struct ipath_other_headers oth;
141 } l;
142 struct ipath_other_headers oth;
143 } u;
144 } __attribute__ ((packed));
145
146 struct ipath_pio_header {
147 __le32 pbc[2];
148 struct ipath_ib_header hdr;
149 } __attribute__ ((packed));
150
151 /*
152 * There is one struct ipath_mcast for each multicast GID.
153 * All attached QPs are then stored as a list of
154 * struct ipath_mcast_qp.
155 */
156 struct ipath_mcast_qp {
157 struct list_head list;
158 struct ipath_qp *qp;
159 };
160
161 struct ipath_mcast {
162 struct rb_node rb_node;
163 union ib_gid mgid;
164 struct list_head qp_list;
165 wait_queue_head_t wait;
166 atomic_t refcount;
167 int n_attached;
168 };
169
170 /* Protection domain */
171 struct ipath_pd {
172 struct ib_pd ibpd;
173 int user; /* non-zero if created from user space */
174 };
175
176 /* Address Handle */
177 struct ipath_ah {
178 struct ib_ah ibah;
179 struct ib_ah_attr attr;
180 };
181
182 /*
183 * This structure is used by ipath_mmap() to validate an offset
184 * when an mmap() request is made. The vm_area_struct then uses
185 * this as its vm_private_data.
186 */
187 struct ipath_mmap_info {
188 struct list_head pending_mmaps;
189 struct ib_ucontext *context;
190 void *obj;
191 __u64 offset;
192 struct kref ref;
193 unsigned size;
194 };
195
196 /*
197 * This structure is used to contain the head pointer, tail pointer,
198 * and completion queue entries as a single memory allocation so
199 * it can be mmap'ed into user space.
200 */
201 struct ipath_cq_wc {
202 u32 head; /* index of next entry to fill */
203 u32 tail; /* index of next ib_poll_cq() entry */
204 union {
205 /* these are actually size ibcq.cqe + 1 */
206 struct ib_uverbs_wc uqueue[0];
207 struct ib_wc kqueue[0];
208 };
209 };
210
211 /*
212 * The completion queue structure.
213 */
214 struct ipath_cq {
215 struct ib_cq ibcq;
216 struct tasklet_struct comptask;
217 spinlock_t lock;
218 u8 notify;
219 u8 triggered;
220 struct ipath_cq_wc *queue;
221 struct ipath_mmap_info *ip;
222 };
223
224 /*
225 * A segment is a linear region of low physical memory.
226 * XXX Maybe we should use phys addr here and kmap()/kunmap().
227 * Used by the verbs layer.
228 */
229 struct ipath_seg {
230 void *vaddr;
231 size_t length;
232 };
233
234 /* The number of ipath_segs that fit in a page. */
235 #define IPATH_SEGSZ (PAGE_SIZE / sizeof (struct ipath_seg))
236
237 struct ipath_segarray {
238 struct ipath_seg segs[IPATH_SEGSZ];
239 };
240
241 struct ipath_mregion {
242 struct ib_pd *pd; /* shares refcnt of ibmr.pd */
243 u64 user_base; /* User's address for this region */
244 u64 iova; /* IB start address of this region */
245 size_t length;
246 u32 lkey;
247 u32 offset; /* offset (bytes) to start of region */
248 int access_flags;
249 u32 max_segs; /* number of ipath_segs in all the arrays */
250 u32 mapsz; /* size of the map array */
251 struct ipath_segarray *map[0]; /* the segments */
252 };
253
254 /*
255 * These keep track of the copy progress within a memory region.
256 * Used by the verbs layer.
257 */
258 struct ipath_sge {
259 struct ipath_mregion *mr;
260 void *vaddr; /* kernel virtual address of segment */
261 u32 sge_length; /* length of the SGE */
262 u32 length; /* remaining length of the segment */
263 u16 m; /* current index: mr->map[m] */
264 u16 n; /* current index: mr->map[m]->segs[n] */
265 };
266
267 /* Memory region */
268 struct ipath_mr {
269 struct ib_mr ibmr;
270 struct ib_umem *umem;
271 struct ipath_mregion mr; /* must be last */
272 };
273
274 /*
275 * Send work request queue entry.
276 * The size of the sg_list is determined when the QP is created and stored
277 * in qp->s_max_sge.
278 */
279 struct ipath_swqe {
280 union {
281 struct ib_send_wr wr; /* don't use wr.sg_list */
282 struct ib_ud_wr ud_wr;
283 struct ib_rdma_wr rdma_wr;
284 struct ib_atomic_wr atomic_wr;
285 };
286
287 u32 psn; /* first packet sequence number */
288 u32 lpsn; /* last packet sequence number */
289 u32 ssn; /* send sequence number */
290 u32 length; /* total length of data in sg_list */
291 struct ipath_sge sg_list[0];
292 };
293
294 /*
295 * Receive work request queue entry.
296 * The size of the sg_list is determined when the QP (or SRQ) is created
297 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
298 */
299 struct ipath_rwqe {
300 u64 wr_id;
301 u8 num_sge;
302 struct ib_sge sg_list[0];
303 };
304
305 /*
306 * This structure is used to contain the head pointer, tail pointer,
307 * and receive work queue entries as a single memory allocation so
308 * it can be mmap'ed into user space.
309 * Note that the wq array elements are variable size so you can't
310 * just index into the array to get the N'th element;
311 * use get_rwqe_ptr() instead.
312 */
313 struct ipath_rwq {
314 u32 head; /* new work requests posted to the head */
315 u32 tail; /* receives pull requests from here. */
316 struct ipath_rwqe wq[0];
317 };
318
319 struct ipath_rq {
320 struct ipath_rwq *wq;
321 spinlock_t lock;
322 u32 size; /* size of RWQE array */
323 u8 max_sge;
324 };
325
326 struct ipath_srq {
327 struct ib_srq ibsrq;
328 struct ipath_rq rq;
329 struct ipath_mmap_info *ip;
330 /* send signal when number of RWQEs < limit */
331 u32 limit;
332 };
333
334 struct ipath_sge_state {
335 struct ipath_sge *sg_list; /* next SGE to be used if any */
336 struct ipath_sge sge; /* progress state for the current SGE */
337 u8 num_sge;
338 u8 static_rate;
339 };
340
341 /*
342 * This structure holds the information that the send tasklet needs
343 * to send a RDMA read response or atomic operation.
344 */
345 struct ipath_ack_entry {
346 u8 opcode;
347 u8 sent;
348 u32 psn;
349 union {
350 struct ipath_sge_state rdma_sge;
351 u64 atomic_data;
352 };
353 };
354
355 /*
356 * Variables prefixed with s_ are for the requester (sender).
357 * Variables prefixed with r_ are for the responder (receiver).
358 * Variables prefixed with ack_ are for responder replies.
359 *
360 * Common variables are protected by both r_rq.lock and s_lock in that order
361 * which only happens in modify_qp() or changing the QP 'state'.
362 */
363 struct ipath_qp {
364 struct ib_qp ibqp;
365 struct ipath_qp *next; /* link list for QPN hash table */
366 struct ipath_qp *timer_next; /* link list for ipath_ib_timer() */
367 struct ipath_qp *pio_next; /* link for ipath_ib_piobufavail() */
368 struct list_head piowait; /* link for wait PIO buf */
369 struct list_head timerwait; /* link for waiting for timeouts */
370 struct ib_ah_attr remote_ah_attr;
371 struct ipath_ib_header s_hdr; /* next packet header to send */
372 atomic_t refcount;
373 wait_queue_head_t wait;
374 wait_queue_head_t wait_dma;
375 struct tasklet_struct s_task;
376 struct ipath_mmap_info *ip;
377 struct ipath_sge_state *s_cur_sge;
378 struct ipath_verbs_txreq *s_tx;
379 struct ipath_sge_state s_sge; /* current send request data */
380 struct ipath_ack_entry s_ack_queue[IPATH_MAX_RDMA_ATOMIC + 1];
381 struct ipath_sge_state s_ack_rdma_sge;
382 struct ipath_sge_state s_rdma_read_sge;
383 struct ipath_sge_state r_sge; /* current receive data */
384 spinlock_t s_lock;
385 atomic_t s_dma_busy;
386 u16 s_pkt_delay;
387 u16 s_hdrwords; /* size of s_hdr in 32 bit words */
388 u32 s_cur_size; /* size of send packet in bytes */
389 u32 s_len; /* total length of s_sge */
390 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
391 u32 s_next_psn; /* PSN for next request */
392 u32 s_last_psn; /* last response PSN processed */
393 u32 s_psn; /* current packet sequence number */
394 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
395 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
396 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
397 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
398 u64 r_wr_id; /* ID for current receive WQE */
399 unsigned long r_aflags;
400 u32 r_len; /* total length of r_sge */
401 u32 r_rcv_len; /* receive data len processed */
402 u32 r_psn; /* expected rcv packet sequence number */
403 u32 r_msn; /* message sequence number */
404 u8 state; /* QP state */
405 u8 s_state; /* opcode of last packet sent */
406 u8 s_ack_state; /* opcode of packet to ACK */
407 u8 s_nak_state; /* non-zero if NAK is pending */
408 u8 r_state; /* opcode of last packet received */
409 u8 r_nak_state; /* non-zero if NAK is pending */
410 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
411 u8 r_flags;
412 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
413 u8 r_head_ack_queue; /* index into s_ack_queue[] */
414 u8 qp_access_flags;
415 u8 s_max_sge; /* size of s_wq->sg_list */
416 u8 s_retry_cnt; /* number of times to retry */
417 u8 s_rnr_retry_cnt;
418 u8 s_retry; /* requester retry counter */
419 u8 s_rnr_retry; /* requester RNR retry counter */
420 u8 s_pkey_index; /* PKEY index to use */
421 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
422 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
423 u8 s_tail_ack_queue; /* index into s_ack_queue[] */
424 u8 s_flags;
425 u8 s_dmult;
426 u8 s_draining;
427 u8 timeout; /* Timeout for this QP */
428 enum ib_mtu path_mtu;
429 u32 remote_qpn;
430 u32 qkey; /* QKEY for this QP (for UD or RD) */
431 u32 s_size; /* send work queue size */
432 u32 s_head; /* new entries added here */
433 u32 s_tail; /* next entry to process */
434 u32 s_cur; /* current work queue entry */
435 u32 s_last; /* last un-ACK'ed entry */
436 u32 s_ssn; /* SSN of tail entry */
437 u32 s_lsn; /* limit sequence number (credit) */
438 struct ipath_swqe *s_wq; /* send work queue */
439 struct ipath_swqe *s_wqe;
440 struct ipath_sge *r_ud_sg_list;
441 struct ipath_rq r_rq; /* receive work queue */
442 struct ipath_sge r_sg_list[0]; /* verified SGEs */
443 };
444
445 /*
446 * Atomic bit definitions for r_aflags.
447 */
448 #define IPATH_R_WRID_VALID 0
449
450 /*
451 * Bit definitions for r_flags.
452 */
453 #define IPATH_R_REUSE_SGE 0x01
454 #define IPATH_R_RDMAR_SEQ 0x02
455
456 /*
457 * Bit definitions for s_flags.
458 *
459 * IPATH_S_FENCE_PENDING - waiting for all prior RDMA read or atomic SWQEs
460 * before processing the next SWQE
461 * IPATH_S_RDMAR_PENDING - waiting for any RDMA read or atomic SWQEs
462 * before processing the next SWQE
463 * IPATH_S_WAITING - waiting for RNR timeout or send buffer available.
464 * IPATH_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
465 * IPATH_S_WAIT_DMA - waiting for send DMA queue to drain before generating
466 * next send completion entry not via send DMA.
467 */
468 #define IPATH_S_SIGNAL_REQ_WR 0x01
469 #define IPATH_S_FENCE_PENDING 0x02
470 #define IPATH_S_RDMAR_PENDING 0x04
471 #define IPATH_S_ACK_PENDING 0x08
472 #define IPATH_S_BUSY 0x10
473 #define IPATH_S_WAITING 0x20
474 #define IPATH_S_WAIT_SSN_CREDIT 0x40
475 #define IPATH_S_WAIT_DMA 0x80
476
477 #define IPATH_S_ANY_WAIT (IPATH_S_FENCE_PENDING | IPATH_S_RDMAR_PENDING | \
478 IPATH_S_WAITING | IPATH_S_WAIT_SSN_CREDIT | IPATH_S_WAIT_DMA)
479
480 #define IPATH_PSN_CREDIT 512
481
482 /*
483 * Since struct ipath_swqe is not a fixed size, we can't simply index into
484 * struct ipath_qp.s_wq. This function does the array index computation.
485 */
get_swqe_ptr(struct ipath_qp * qp,unsigned n)486 static inline struct ipath_swqe *get_swqe_ptr(struct ipath_qp *qp,
487 unsigned n)
488 {
489 return (struct ipath_swqe *)((char *)qp->s_wq +
490 (sizeof(struct ipath_swqe) +
491 qp->s_max_sge *
492 sizeof(struct ipath_sge)) * n);
493 }
494
495 /*
496 * Since struct ipath_rwqe is not a fixed size, we can't simply index into
497 * struct ipath_rwq.wq. This function does the array index computation.
498 */
get_rwqe_ptr(struct ipath_rq * rq,unsigned n)499 static inline struct ipath_rwqe *get_rwqe_ptr(struct ipath_rq *rq,
500 unsigned n)
501 {
502 return (struct ipath_rwqe *)
503 ((char *) rq->wq->wq +
504 (sizeof(struct ipath_rwqe) +
505 rq->max_sge * sizeof(struct ib_sge)) * n);
506 }
507
508 /*
509 * QPN-map pages start out as NULL, they get allocated upon
510 * first use and are never deallocated. This way,
511 * large bitmaps are not allocated unless large numbers of QPs are used.
512 */
513 struct qpn_map {
514 atomic_t n_free;
515 void *page;
516 };
517
518 struct ipath_qp_table {
519 spinlock_t lock;
520 u32 last; /* last QP number allocated */
521 u32 max; /* size of the hash table */
522 u32 nmaps; /* size of the map table */
523 struct ipath_qp **table;
524 /* bit map of free numbers */
525 struct qpn_map map[QPNMAP_ENTRIES];
526 };
527
528 struct ipath_lkey_table {
529 spinlock_t lock;
530 u32 next; /* next unused index (speeds search) */
531 u32 gen; /* generation count */
532 u32 max; /* size of the table */
533 struct ipath_mregion **table;
534 };
535
536 struct ipath_opcode_stats {
537 u64 n_packets; /* number of packets */
538 u64 n_bytes; /* total number of bytes */
539 };
540
541 struct ipath_ibdev {
542 struct ib_device ibdev;
543 struct ipath_devdata *dd;
544 struct list_head pending_mmaps;
545 spinlock_t mmap_offset_lock;
546 u32 mmap_offset;
547 int ib_unit; /* This is the device number */
548 u16 sm_lid; /* in host order */
549 u8 sm_sl;
550 u8 mkeyprot;
551 /* non-zero when timer is set */
552 unsigned long mkey_lease_timeout;
553
554 /* The following fields are really per port. */
555 struct ipath_qp_table qp_table;
556 struct ipath_lkey_table lk_table;
557 struct list_head pending[3]; /* FIFO of QPs waiting for ACKs */
558 struct list_head piowait; /* list for wait PIO buf */
559 struct list_head txreq_free;
560 void *txreq_bufs;
561 /* list of QPs waiting for RNR timer */
562 struct list_head rnrwait;
563 spinlock_t pending_lock;
564 __be64 sys_image_guid; /* in network order */
565 __be64 gid_prefix; /* in network order */
566 __be64 mkey;
567
568 u32 n_pds_allocated; /* number of PDs allocated for device */
569 spinlock_t n_pds_lock;
570 u32 n_ahs_allocated; /* number of AHs allocated for device */
571 spinlock_t n_ahs_lock;
572 u32 n_cqs_allocated; /* number of CQs allocated for device */
573 spinlock_t n_cqs_lock;
574 u32 n_qps_allocated; /* number of QPs allocated for device */
575 spinlock_t n_qps_lock;
576 u32 n_srqs_allocated; /* number of SRQs allocated for device */
577 spinlock_t n_srqs_lock;
578 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
579 spinlock_t n_mcast_grps_lock;
580
581 u64 ipath_sword; /* total dwords sent (sample result) */
582 u64 ipath_rword; /* total dwords received (sample result) */
583 u64 ipath_spkts; /* total packets sent (sample result) */
584 u64 ipath_rpkts; /* total packets received (sample result) */
585 /* # of ticks no data sent (sample result) */
586 u64 ipath_xmit_wait;
587 u64 rcv_errors; /* # of packets with SW detected rcv errs */
588 u64 n_unicast_xmit; /* total unicast packets sent */
589 u64 n_unicast_rcv; /* total unicast packets received */
590 u64 n_multicast_xmit; /* total multicast packets sent */
591 u64 n_multicast_rcv; /* total multicast packets received */
592 u64 z_symbol_error_counter; /* starting count for PMA */
593 u64 z_link_error_recovery_counter; /* starting count for PMA */
594 u64 z_link_downed_counter; /* starting count for PMA */
595 u64 z_port_rcv_errors; /* starting count for PMA */
596 u64 z_port_rcv_remphys_errors; /* starting count for PMA */
597 u64 z_port_xmit_discards; /* starting count for PMA */
598 u64 z_port_xmit_data; /* starting count for PMA */
599 u64 z_port_rcv_data; /* starting count for PMA */
600 u64 z_port_xmit_packets; /* starting count for PMA */
601 u64 z_port_rcv_packets; /* starting count for PMA */
602 u32 z_pkey_violations; /* starting count for PMA */
603 u32 z_local_link_integrity_errors; /* starting count for PMA */
604 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */
605 u32 z_vl15_dropped; /* starting count for PMA */
606 u32 n_rc_resends;
607 u32 n_rc_acks;
608 u32 n_rc_qacks;
609 u32 n_seq_naks;
610 u32 n_rdma_seq;
611 u32 n_rnr_naks;
612 u32 n_other_naks;
613 u32 n_timeouts;
614 u32 n_pkt_drops;
615 u32 n_vl15_dropped;
616 u32 n_wqe_errs;
617 u32 n_rdma_dup_busy;
618 u32 n_piowait;
619 u32 n_unaligned;
620 u32 port_cap_flags;
621 u32 pma_sample_start;
622 u32 pma_sample_interval;
623 __be16 pma_counter_select[5];
624 u16 pma_tag;
625 u16 qkey_violations;
626 u16 mkey_violations;
627 u16 mkey_lease_period;
628 u16 pending_index; /* which pending queue is active */
629 u8 pma_sample_status;
630 u8 subnet_timeout;
631 u8 vl_high_limit;
632 struct ipath_opcode_stats opstats[128];
633 };
634
635 struct ipath_verbs_counters {
636 u64 symbol_error_counter;
637 u64 link_error_recovery_counter;
638 u64 link_downed_counter;
639 u64 port_rcv_errors;
640 u64 port_rcv_remphys_errors;
641 u64 port_xmit_discards;
642 u64 port_xmit_data;
643 u64 port_rcv_data;
644 u64 port_xmit_packets;
645 u64 port_rcv_packets;
646 u32 local_link_integrity_errors;
647 u32 excessive_buffer_overrun_errors;
648 u32 vl15_dropped;
649 };
650
651 struct ipath_verbs_txreq {
652 struct ipath_qp *qp;
653 struct ipath_swqe *wqe;
654 u32 map_len;
655 u32 len;
656 struct ipath_sge_state *ss;
657 struct ipath_pio_header hdr;
658 struct ipath_sdma_txreq txreq;
659 };
660
to_imr(struct ib_mr * ibmr)661 static inline struct ipath_mr *to_imr(struct ib_mr *ibmr)
662 {
663 return container_of(ibmr, struct ipath_mr, ibmr);
664 }
665
to_ipd(struct ib_pd * ibpd)666 static inline struct ipath_pd *to_ipd(struct ib_pd *ibpd)
667 {
668 return container_of(ibpd, struct ipath_pd, ibpd);
669 }
670
to_iah(struct ib_ah * ibah)671 static inline struct ipath_ah *to_iah(struct ib_ah *ibah)
672 {
673 return container_of(ibah, struct ipath_ah, ibah);
674 }
675
to_icq(struct ib_cq * ibcq)676 static inline struct ipath_cq *to_icq(struct ib_cq *ibcq)
677 {
678 return container_of(ibcq, struct ipath_cq, ibcq);
679 }
680
to_isrq(struct ib_srq * ibsrq)681 static inline struct ipath_srq *to_isrq(struct ib_srq *ibsrq)
682 {
683 return container_of(ibsrq, struct ipath_srq, ibsrq);
684 }
685
to_iqp(struct ib_qp * ibqp)686 static inline struct ipath_qp *to_iqp(struct ib_qp *ibqp)
687 {
688 return container_of(ibqp, struct ipath_qp, ibqp);
689 }
690
to_idev(struct ib_device * ibdev)691 static inline struct ipath_ibdev *to_idev(struct ib_device *ibdev)
692 {
693 return container_of(ibdev, struct ipath_ibdev, ibdev);
694 }
695
696 /*
697 * This must be called with s_lock held.
698 */
ipath_schedule_send(struct ipath_qp * qp)699 static inline void ipath_schedule_send(struct ipath_qp *qp)
700 {
701 if (qp->s_flags & IPATH_S_ANY_WAIT)
702 qp->s_flags &= ~IPATH_S_ANY_WAIT;
703 if (!(qp->s_flags & IPATH_S_BUSY))
704 tasklet_hi_schedule(&qp->s_task);
705 }
706
707 int ipath_process_mad(struct ib_device *ibdev,
708 int mad_flags,
709 u8 port_num,
710 const struct ib_wc *in_wc,
711 const struct ib_grh *in_grh,
712 const struct ib_mad_hdr *in, size_t in_mad_size,
713 struct ib_mad_hdr *out, size_t *out_mad_size,
714 u16 *out_mad_pkey_index);
715
716 /*
717 * Compare the lower 24 bits of the two values.
718 * Returns an integer <, ==, or > than zero.
719 */
ipath_cmp24(u32 a,u32 b)720 static inline int ipath_cmp24(u32 a, u32 b)
721 {
722 return (((int) a) - ((int) b)) << 8;
723 }
724
725 struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid);
726
727 int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
728 u64 *rwords, u64 *spkts, u64 *rpkts,
729 u64 *xmit_wait);
730
731 int ipath_get_counters(struct ipath_devdata *dd,
732 struct ipath_verbs_counters *cntrs);
733
734 int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
735
736 int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
737
738 int ipath_mcast_tree_empty(void);
739
740 __be32 ipath_compute_aeth(struct ipath_qp *qp);
741
742 struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn);
743
744 struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
745 struct ib_qp_init_attr *init_attr,
746 struct ib_udata *udata);
747
748 int ipath_destroy_qp(struct ib_qp *ibqp);
749
750 int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err);
751
752 int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
753 int attr_mask, struct ib_udata *udata);
754
755 int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
756 int attr_mask, struct ib_qp_init_attr *init_attr);
757
758 unsigned ipath_free_all_qps(struct ipath_qp_table *qpt);
759
760 int ipath_init_qp_table(struct ipath_ibdev *idev, int size);
761
762 void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
763
764 unsigned ipath_ib_rate_to_mult(enum ib_rate rate);
765
766 int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
767 u32 hdrwords, struct ipath_sge_state *ss, u32 len);
768
769 void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);
770
771 void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
772
773 void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
774 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
775
776 void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
777 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
778
779 void ipath_restart_rc(struct ipath_qp *qp, u32 psn);
780
781 void ipath_rc_error(struct ipath_qp *qp, enum ib_wc_status err);
782
783 int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);
784
785 void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
786 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
787
788 int ipath_alloc_lkey(struct ipath_lkey_table *rkt,
789 struct ipath_mregion *mr);
790
791 void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey);
792
793 int ipath_lkey_ok(struct ipath_qp *qp, struct ipath_sge *isge,
794 struct ib_sge *sge, int acc);
795
796 int ipath_rkey_ok(struct ipath_qp *qp, struct ipath_sge_state *ss,
797 u32 len, u64 vaddr, u32 rkey, int acc);
798
799 int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
800 struct ib_recv_wr **bad_wr);
801
802 struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
803 struct ib_srq_init_attr *srq_init_attr,
804 struct ib_udata *udata);
805
806 int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
807 enum ib_srq_attr_mask attr_mask,
808 struct ib_udata *udata);
809
810 int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
811
812 int ipath_destroy_srq(struct ib_srq *ibsrq);
813
814 void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
815
816 int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
817
818 struct ib_cq *ipath_create_cq(struct ib_device *ibdev,
819 const struct ib_cq_init_attr *attr,
820 struct ib_ucontext *context,
821 struct ib_udata *udata);
822
823 int ipath_destroy_cq(struct ib_cq *ibcq);
824
825 int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
826
827 int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
828
829 struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc);
830
831 struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
832 struct ib_phys_buf *buffer_list,
833 int num_phys_buf, int acc, u64 *iova_start);
834
835 struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
836 u64 virt_addr, int mr_access_flags,
837 struct ib_udata *udata);
838
839 int ipath_dereg_mr(struct ib_mr *ibmr);
840
841 struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
842 struct ib_fmr_attr *fmr_attr);
843
844 int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
845 int list_len, u64 iova);
846
847 int ipath_unmap_fmr(struct list_head *fmr_list);
848
849 int ipath_dealloc_fmr(struct ib_fmr *ibfmr);
850
851 void ipath_release_mmap_info(struct kref *ref);
852
853 struct ipath_mmap_info *ipath_create_mmap_info(struct ipath_ibdev *dev,
854 u32 size,
855 struct ib_ucontext *context,
856 void *obj);
857
858 void ipath_update_mmap_info(struct ipath_ibdev *dev,
859 struct ipath_mmap_info *ip,
860 u32 size, void *obj);
861
862 int ipath_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
863
864 void ipath_insert_rnr_queue(struct ipath_qp *qp);
865
866 int ipath_init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
867 u32 *lengthp, struct ipath_sge_state *ss);
868
869 int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
870
871 u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
872 struct ib_global_route *grh, u32 hwords, u32 nwords);
873
874 void ipath_make_ruc_header(struct ipath_ibdev *dev, struct ipath_qp *qp,
875 struct ipath_other_headers *ohdr,
876 u32 bth0, u32 bth2);
877
878 void ipath_do_send(unsigned long data);
879
880 void ipath_send_complete(struct ipath_qp *qp, struct ipath_swqe *wqe,
881 enum ib_wc_status status);
882
883 int ipath_make_rc_req(struct ipath_qp *qp);
884
885 int ipath_make_uc_req(struct ipath_qp *qp);
886
887 int ipath_make_ud_req(struct ipath_qp *qp);
888
889 int ipath_register_ib_device(struct ipath_devdata *);
890
891 void ipath_unregister_ib_device(struct ipath_ibdev *);
892
893 void ipath_ib_rcv(struct ipath_ibdev *, void *, void *, u32);
894
895 int ipath_ib_piobufavail(struct ipath_ibdev *);
896
897 unsigned ipath_get_npkeys(struct ipath_devdata *);
898
899 u32 ipath_get_cr_errpkey(struct ipath_devdata *);
900
901 unsigned ipath_get_pkey(struct ipath_devdata *, unsigned);
902
903 extern const enum ib_wc_opcode ib_ipath_wc_opcode[];
904
905 /*
906 * Below converts HCA-specific LinkTrainingState to IB PhysPortState
907 * values.
908 */
909 extern const u8 ipath_cvt_physportstate[];
910 #define IB_PHYSPORTSTATE_SLEEP 1
911 #define IB_PHYSPORTSTATE_POLL 2
912 #define IB_PHYSPORTSTATE_DISABLED 3
913 #define IB_PHYSPORTSTATE_CFG_TRAIN 4
914 #define IB_PHYSPORTSTATE_LINKUP 5
915 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
916
917 extern const int ib_ipath_state_ops[];
918
919 extern unsigned int ib_ipath_lkey_table_size;
920
921 extern unsigned int ib_ipath_max_cqes;
922
923 extern unsigned int ib_ipath_max_cqs;
924
925 extern unsigned int ib_ipath_max_qp_wrs;
926
927 extern unsigned int ib_ipath_max_qps;
928
929 extern unsigned int ib_ipath_max_sges;
930
931 extern unsigned int ib_ipath_max_mcast_grps;
932
933 extern unsigned int ib_ipath_max_mcast_qp_attached;
934
935 extern unsigned int ib_ipath_max_srqs;
936
937 extern unsigned int ib_ipath_max_srq_sges;
938
939 extern unsigned int ib_ipath_max_srq_wrs;
940
941 extern const u32 ib_ipath_rnr_table[];
942
943 extern struct ib_dma_mapping_ops ipath_dma_mapping_ops;
944
945 #endif /* IPATH_VERBS_H */
946