2 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
3 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
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>
44 #include "ipath_layer.h"
45 #include "verbs_debug.h"
47 #define QPN_MAX (1 << 24)
48 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
51 * Increment this value if any changes that break userspace ABI
52 * compatibility are made.
54 #define IPATH_UVERBS_ABI_VERSION 2
57 * Define an ib_cq_notify value that is not valid so we know when CQ
58 * notifications are armed.
60 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
62 #define IB_RNR_NAK 0x20
63 #define IB_NAK_PSN_ERROR 0x60
64 #define IB_NAK_INVALID_REQUEST 0x61
65 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
66 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
67 #define IB_NAK_INVALID_RD_REQUEST 0x64
69 #define IPATH_POST_SEND_OK 0x01
70 #define IPATH_POST_RECV_OK 0x02
71 #define IPATH_PROCESS_RECV_OK 0x04
72 #define IPATH_PROCESS_SEND_OK 0x08
74 /* IB Performance Manager status values */
75 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
76 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
77 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
79 /* Mandatory IB performance counter select values. */
80 #define IB_PMA_PORT_XMIT_DATA __constant_htons(0x0001)
81 #define IB_PMA_PORT_RCV_DATA __constant_htons(0x0002)
82 #define IB_PMA_PORT_XMIT_PKTS __constant_htons(0x0003)
83 #define IB_PMA_PORT_RCV_PKTS __constant_htons(0x0004)
84 #define IB_PMA_PORT_XMIT_WAIT __constant_htons(0x0005)
90 } __attribute__ ((packed));
92 struct ib_atomic_eth {
97 } __attribute__ ((packed));
99 struct ipath_other_headers {
112 __be64 atomic_ack_eth;
116 struct ib_atomic_eth atomic_eth;
118 } __attribute__ ((packed));
121 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
122 * long (72 w/ imm_data). Only the first 56 bytes of the IB header
123 * will be in the eager header buffer. The remaining 12 or 16 bytes
124 * are in the data buffer.
126 struct ipath_ib_header {
131 struct ipath_other_headers oth;
133 struct ipath_other_headers oth;
135 } __attribute__ ((packed));
138 * There is one struct ipath_mcast for each multicast GID.
139 * All attached QPs are then stored as a list of
140 * struct ipath_mcast_qp.
142 struct ipath_mcast_qp {
143 struct list_head list;
148 struct rb_node rb_node;
150 struct list_head qp_list;
151 wait_queue_head_t wait;
159 struct ipath_mregion mr; /* must be last */
162 /* Fast memory region */
166 struct ipath_mregion mr; /* must be last */
169 /* Protection domain */
172 int user; /* non-zero if created from user space */
178 struct ib_ah_attr attr;
182 * This structure is used by ipath_mmap() to validate an offset
183 * when an mmap() request is made. The vm_area_struct then uses
184 * this as its vm_private_data.
186 struct ipath_mmap_info {
187 struct ipath_mmap_info *next;
188 struct ib_ucontext *context;
196 * This structure is used to contain the head pointer, tail pointer,
197 * and completion queue entries as a single memory allocation so
198 * it can be mmap'ed into user space.
201 u32 head; /* index of next entry to fill */
202 u32 tail; /* index of next ib_poll_cq() entry */
203 struct ib_wc queue[1]; /* this is actually size ibcq.cqe + 1 */
207 * The completion queue structure.
211 struct tasklet_struct comptask;
215 struct ipath_cq_wc *queue;
216 struct ipath_mmap_info *ip;
220 * Send work request queue entry.
221 * The size of the sg_list is determined when the QP is created and stored
225 struct ib_send_wr wr; /* don't use wr.sg_list */
226 u32 psn; /* first packet sequence number */
227 u32 lpsn; /* last packet sequence number */
228 u32 ssn; /* send sequence number */
229 u32 length; /* total length of data in sg_list */
230 struct ipath_sge sg_list[0];
234 * Receive work request queue entry.
235 * The size of the sg_list is determined when the QP (or SRQ) is created
236 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
241 struct ib_sge sg_list[0];
245 * This structure is used to contain the head pointer, tail pointer,
246 * and receive work queue entries as a single memory allocation so
247 * it can be mmap'ed into user space.
248 * Note that the wq array elements are variable size so you can't
249 * just index into the array to get the N'th element;
250 * use get_rwqe_ptr() instead.
253 u32 head; /* new work requests posted to the head */
254 u32 tail; /* receives pull requests from here. */
255 struct ipath_rwqe wq[0];
259 struct ipath_rwq *wq;
261 u32 size; /* size of RWQE array */
268 struct ipath_mmap_info *ip;
269 /* send signal when number of RWQEs < limit */
274 * Variables prefixed with s_ are for the requester (sender).
275 * Variables prefixed with r_ are for the responder (receiver).
276 * Variables prefixed with ack_ are for responder replies.
278 * Common variables are protected by both r_rq.lock and s_lock in that order
279 * which only happens in modify_qp() or changing the QP 'state'.
283 struct ipath_qp *next; /* link list for QPN hash table */
284 struct ipath_qp *timer_next; /* link list for ipath_ib_timer() */
285 struct list_head piowait; /* link for wait PIO buf */
286 struct list_head timerwait; /* link for waiting for timeouts */
287 struct ib_ah_attr remote_ah_attr;
288 struct ipath_ib_header s_hdr; /* next packet header to send */
290 wait_queue_head_t wait;
291 struct tasklet_struct s_task;
292 struct ipath_mmap_info *ip;
293 struct ipath_sge_state *s_cur_sge;
294 struct ipath_sge_state s_sge; /* current send request data */
295 /* current RDMA read send data */
296 struct ipath_sge_state s_rdma_sge;
297 struct ipath_sge_state r_sge; /* current receive data */
299 unsigned long s_flags;
300 u32 s_hdrwords; /* size of s_hdr in 32 bit words */
301 u32 s_cur_size; /* size of send packet in bytes */
302 u32 s_len; /* total length of s_sge */
303 u32 s_rdma_len; /* total length of s_rdma_sge */
304 u32 s_next_psn; /* PSN for next request */
305 u32 s_last_psn; /* last response PSN processed */
306 u32 s_psn; /* current packet sequence number */
307 u32 s_ack_psn; /* PSN for RDMA_READ */
308 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
309 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
310 u64 r_wr_id; /* ID for current receive WQE */
311 u64 r_atomic_data; /* data for last atomic op */
312 u32 r_atomic_psn; /* PSN of last atomic op */
313 u32 r_len; /* total length of r_sge */
314 u32 r_rcv_len; /* receive data len processed */
315 u32 r_psn; /* expected rcv packet sequence number */
316 u32 r_msn; /* message sequence number */
317 u8 state; /* QP state */
318 u8 s_state; /* opcode of last packet sent */
319 u8 s_ack_state; /* opcode of packet to ACK */
320 u8 s_nak_state; /* non-zero if NAK is pending */
321 u8 r_state; /* opcode of last packet received */
322 u8 r_ack_state; /* opcode of packet to ACK */
323 u8 r_nak_state; /* non-zero if NAK is pending */
324 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
325 u8 r_reuse_sge; /* for UC receive errors */
326 u8 r_sge_inx; /* current index into sg_list */
328 u8 s_max_sge; /* size of s_wq->sg_list */
329 u8 s_retry_cnt; /* number of times to retry */
331 u8 s_retry; /* requester retry counter */
332 u8 s_rnr_retry; /* requester RNR retry counter */
333 u8 s_pkey_index; /* PKEY index to use */
334 enum ib_mtu path_mtu;
336 u32 qkey; /* QKEY for this QP (for UD or RD) */
337 u32 s_size; /* send work queue size */
338 u32 s_head; /* new entries added here */
339 u32 s_tail; /* next entry to process */
340 u32 s_cur; /* current work queue entry */
341 u32 s_last; /* last un-ACK'ed entry */
342 u32 s_ssn; /* SSN of tail entry */
343 u32 s_lsn; /* limit sequence number (credit) */
344 struct ipath_swqe *s_wq; /* send work queue */
345 struct ipath_rq r_rq; /* receive work queue */
346 struct ipath_sge r_sg_list[0]; /* verified SGEs */
350 * Bit definitions for s_flags.
352 #define IPATH_S_BUSY 0
353 #define IPATH_S_SIGNAL_REQ_WR 1
356 * Since struct ipath_swqe is not a fixed size, we can't simply index into
357 * struct ipath_qp.s_wq. This function does the array index computation.
359 static inline struct ipath_swqe *get_swqe_ptr(struct ipath_qp *qp,
362 return (struct ipath_swqe *)((char *)qp->s_wq +
363 (sizeof(struct ipath_swqe) +
365 sizeof(struct ipath_sge)) * n);
369 * Since struct ipath_rwqe is not a fixed size, we can't simply index into
370 * struct ipath_rwq.wq. This function does the array index computation.
372 static inline struct ipath_rwqe *get_rwqe_ptr(struct ipath_rq *rq,
375 return (struct ipath_rwqe *)
376 ((char *) rq->wq->wq +
377 (sizeof(struct ipath_rwqe) +
378 rq->max_sge * sizeof(struct ib_sge)) * n);
382 * QPN-map pages start out as NULL, they get allocated upon
383 * first use and are never deallocated. This way,
384 * large bitmaps are not allocated unless large numbers of QPs are used.
391 struct ipath_qp_table {
393 u32 last; /* last QP number allocated */
394 u32 max; /* size of the hash table */
395 u32 nmaps; /* size of the map table */
396 struct ipath_qp **table;
397 /* bit map of free numbers */
398 struct qpn_map map[QPNMAP_ENTRIES];
401 struct ipath_lkey_table {
403 u32 next; /* next unused index (speeds search) */
404 u32 gen; /* generation count */
405 u32 max; /* size of the table */
406 struct ipath_mregion **table;
409 struct ipath_opcode_stats {
410 u64 n_packets; /* number of packets */
411 u64 n_bytes; /* total number of bytes */
415 struct ib_device ibdev;
416 struct list_head dev_list;
417 struct ipath_devdata *dd;
418 struct ipath_mmap_info *pending_mmaps;
419 int ib_unit; /* This is the device number */
420 u16 sm_lid; /* in host order */
422 u8 mkeyprot_resv_lmc;
423 /* non-zero when timer is set */
424 unsigned long mkey_lease_timeout;
426 /* The following fields are really per port. */
427 struct ipath_qp_table qp_table;
428 struct ipath_lkey_table lk_table;
429 struct list_head pending[3]; /* FIFO of QPs waiting for ACKs */
430 struct list_head piowait; /* list for wait PIO buf */
431 /* list of QPs waiting for RNR timer */
432 struct list_head rnrwait;
433 spinlock_t pending_lock;
434 __be64 sys_image_guid; /* in network order */
435 __be64 gid_prefix; /* in network order */
438 u32 n_pds_allocated; /* number of PDs allocated for device */
439 spinlock_t n_pds_lock;
440 u32 n_ahs_allocated; /* number of AHs allocated for device */
441 spinlock_t n_ahs_lock;
442 u32 n_cqs_allocated; /* number of CQs allocated for device */
443 spinlock_t n_cqs_lock;
444 u32 n_srqs_allocated; /* number of SRQs allocated for device */
445 spinlock_t n_srqs_lock;
446 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
447 spinlock_t n_mcast_grps_lock;
449 u64 ipath_sword; /* total dwords sent (sample result) */
450 u64 ipath_rword; /* total dwords received (sample result) */
451 u64 ipath_spkts; /* total packets sent (sample result) */
452 u64 ipath_rpkts; /* total packets received (sample result) */
453 /* # of ticks no data sent (sample result) */
455 u64 rcv_errors; /* # of packets with SW detected rcv errs */
456 u64 n_unicast_xmit; /* total unicast packets sent */
457 u64 n_unicast_rcv; /* total unicast packets received */
458 u64 n_multicast_xmit; /* total multicast packets sent */
459 u64 n_multicast_rcv; /* total multicast packets received */
460 u64 z_symbol_error_counter; /* starting count for PMA */
461 u64 z_link_error_recovery_counter; /* starting count for PMA */
462 u64 z_link_downed_counter; /* starting count for PMA */
463 u64 z_port_rcv_errors; /* starting count for PMA */
464 u64 z_port_rcv_remphys_errors; /* starting count for PMA */
465 u64 z_port_xmit_discards; /* starting count for PMA */
466 u64 z_port_xmit_data; /* starting count for PMA */
467 u64 z_port_rcv_data; /* starting count for PMA */
468 u64 z_port_xmit_packets; /* starting count for PMA */
469 u64 z_port_rcv_packets; /* starting count for PMA */
470 u32 z_pkey_violations; /* starting count for PMA */
471 u32 z_local_link_integrity_errors; /* starting count for PMA */
472 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */
488 u32 pma_sample_start;
489 u32 pma_sample_interval;
490 __be16 pma_counter_select[5];
494 u16 mkey_lease_period;
495 u16 pending_index; /* which pending queue is active */
496 u8 pma_sample_status;
498 u8 link_width_enabled;
500 struct ipath_opcode_stats opstats[128];
503 struct ipath_ucontext {
504 struct ib_ucontext ibucontext;
507 static inline struct ipath_mr *to_imr(struct ib_mr *ibmr)
509 return container_of(ibmr, struct ipath_mr, ibmr);
512 static inline struct ipath_fmr *to_ifmr(struct ib_fmr *ibfmr)
514 return container_of(ibfmr, struct ipath_fmr, ibfmr);
517 static inline struct ipath_pd *to_ipd(struct ib_pd *ibpd)
519 return container_of(ibpd, struct ipath_pd, ibpd);
522 static inline struct ipath_ah *to_iah(struct ib_ah *ibah)
524 return container_of(ibah, struct ipath_ah, ibah);
527 static inline struct ipath_cq *to_icq(struct ib_cq *ibcq)
529 return container_of(ibcq, struct ipath_cq, ibcq);
532 static inline struct ipath_srq *to_isrq(struct ib_srq *ibsrq)
534 return container_of(ibsrq, struct ipath_srq, ibsrq);
537 static inline struct ipath_qp *to_iqp(struct ib_qp *ibqp)
539 return container_of(ibqp, struct ipath_qp, ibqp);
542 static inline struct ipath_ibdev *to_idev(struct ib_device *ibdev)
544 return container_of(ibdev, struct ipath_ibdev, ibdev);
547 int ipath_process_mad(struct ib_device *ibdev,
551 struct ib_grh *in_grh,
552 struct ib_mad *in_mad, struct ib_mad *out_mad);
554 static inline struct ipath_ucontext *to_iucontext(struct ib_ucontext
557 return container_of(ibucontext, struct ipath_ucontext, ibucontext);
561 * Compare the lower 24 bits of the two values.
562 * Returns an integer <, ==, or > than zero.
564 static inline int ipath_cmp24(u32 a, u32 b)
566 return (((int) a) - ((int) b)) << 8;
569 struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid);
571 int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
573 int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
575 int ipath_mcast_tree_empty(void);
577 __be32 ipath_compute_aeth(struct ipath_qp *qp);
579 struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn);
581 struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
582 struct ib_qp_init_attr *init_attr,
583 struct ib_udata *udata);
585 int ipath_destroy_qp(struct ib_qp *ibqp);
587 int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
588 int attr_mask, struct ib_udata *udata);
590 int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
591 int attr_mask, struct ib_qp_init_attr *init_attr);
593 void ipath_free_all_qps(struct ipath_qp_table *qpt);
595 int ipath_init_qp_table(struct ipath_ibdev *idev, int size);
597 void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc);
599 void ipath_get_credit(struct ipath_qp *qp, u32 aeth);
601 void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
603 int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
604 u32 len, u64 vaddr, u32 rkey, int acc);
606 int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
607 struct ib_sge *sge, int acc);
609 void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);
611 void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);
613 int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr);
615 void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
616 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
618 void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
619 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
621 void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc);
623 int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);
625 void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
626 int has_grh, void *data, u32 tlen, struct ipath_qp *qp);
628 int ipath_alloc_lkey(struct ipath_lkey_table *rkt,
629 struct ipath_mregion *mr);
631 void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey);
633 int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
634 struct ib_sge *sge, int acc);
636 int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
637 u32 len, u64 vaddr, u32 rkey, int acc);
639 int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
640 struct ib_recv_wr **bad_wr);
642 struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
643 struct ib_srq_init_attr *srq_init_attr,
644 struct ib_udata *udata);
646 int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
647 enum ib_srq_attr_mask attr_mask,
648 struct ib_udata *udata);
650 int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
652 int ipath_destroy_srq(struct ib_srq *ibsrq);
654 void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);
656 int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
658 struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries,
659 struct ib_ucontext *context,
660 struct ib_udata *udata);
662 int ipath_destroy_cq(struct ib_cq *ibcq);
664 int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify notify);
666 int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
668 struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc);
670 struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
671 struct ib_phys_buf *buffer_list,
672 int num_phys_buf, int acc, u64 *iova_start);
674 struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
676 struct ib_udata *udata);
678 int ipath_dereg_mr(struct ib_mr *ibmr);
680 struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
681 struct ib_fmr_attr *fmr_attr);
683 int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
684 int list_len, u64 iova);
686 int ipath_unmap_fmr(struct list_head *fmr_list);
688 int ipath_dealloc_fmr(struct ib_fmr *ibfmr);
690 void ipath_release_mmap_info(struct kref *ref);
692 int ipath_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
694 void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev);
696 void ipath_insert_rnr_queue(struct ipath_qp *qp);
698 int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);
700 u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
701 struct ib_global_route *grh, u32 hwords, u32 nwords);
703 void ipath_do_ruc_send(unsigned long data);
705 u32 ipath_make_rc_ack(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
708 int ipath_make_rc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
709 u32 pmtu, u32 *bth0p, u32 *bth2p);
711 int ipath_make_uc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
712 u32 pmtu, u32 *bth0p, u32 *bth2p);
714 extern const enum ib_wc_opcode ib_ipath_wc_opcode[];
716 extern const u8 ipath_cvt_physportstate[];
718 extern const int ib_ipath_state_ops[];
720 extern unsigned int ib_ipath_lkey_table_size;
722 extern unsigned int ib_ipath_max_cqes;
724 extern unsigned int ib_ipath_max_cqs;
726 extern unsigned int ib_ipath_max_qp_wrs;
728 extern unsigned int ib_ipath_max_sges;
730 extern unsigned int ib_ipath_max_mcast_grps;
732 extern unsigned int ib_ipath_max_mcast_qp_attached;
734 extern unsigned int ib_ipath_max_srqs;
736 extern unsigned int ib_ipath_max_srq_sges;
738 extern unsigned int ib_ipath_max_srq_wrs;
740 extern const u32 ib_ipath_rnr_table[];
742 #endif /* IPATH_VERBS_H */