2 * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
4 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 #include <linux/types.h>
39 #include <linux/spinlock.h>
40 #include <linux/kernel.h>
41 #include <linux/interrupt.h>
42 #include <linux/kref.h>
43 #include <linux/workqueue.h>
44 #include <linux/completion.h>
45 #include <rdma/ib_pack.h>
46 #include <rdma/ib_user_verbs.h>
51 struct qib_verbs_txreq;
53 #define QIB_MAX_RDMA_ATOMIC 16
54 #define QIB_GUIDS_PER_PORT 5
56 #define QPN_MAX (1 << 24)
57 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
60 * Increment this value if any changes that break userspace ABI
61 * compatibility are made.
63 #define QIB_UVERBS_ABI_VERSION 2
66 * Define an ib_cq_notify value that is not valid so we know when CQ
67 * notifications are armed.
69 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
71 #define IB_SEQ_NAK (3 << 29)
73 /* AETH NAK opcode values */
74 #define IB_RNR_NAK 0x20
75 #define IB_NAK_PSN_ERROR 0x60
76 #define IB_NAK_INVALID_REQUEST 0x61
77 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
78 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
79 #define IB_NAK_INVALID_RD_REQUEST 0x64
81 /* Flags for checking QP state (see ib_qib_state_ops[]) */
82 #define QIB_POST_SEND_OK 0x01
83 #define QIB_POST_RECV_OK 0x02
84 #define QIB_PROCESS_RECV_OK 0x04
85 #define QIB_PROCESS_SEND_OK 0x08
86 #define QIB_PROCESS_NEXT_SEND_OK 0x10
87 #define QIB_FLUSH_SEND 0x20
88 #define QIB_FLUSH_RECV 0x40
89 #define QIB_PROCESS_OR_FLUSH_SEND \
90 (QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND)
92 /* IB Performance Manager status values */
93 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
94 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
95 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
97 /* Mandatory IB performance counter select values. */
98 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
99 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
100 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
101 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
102 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
104 #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0)
106 #define IB_BTH_REQ_ACK (1 << 31)
107 #define IB_BTH_SOLICITED (1 << 23)
108 #define IB_BTH_MIG_REQ (1 << 22)
110 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */
111 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26)
113 #define IB_GRH_VERSION 6
114 #define IB_GRH_VERSION_MASK 0xF
115 #define IB_GRH_VERSION_SHIFT 28
116 #define IB_GRH_TCLASS_MASK 0xFF
117 #define IB_GRH_TCLASS_SHIFT 20
118 #define IB_GRH_FLOW_MASK 0xFFFFF
119 #define IB_GRH_FLOW_SHIFT 0
120 #define IB_GRH_NEXT_HDR 0x1B
122 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
124 /* Values for set/get portinfo VLCap OperationalVLs */
126 #define IB_VL_VL0_1 2
127 #define IB_VL_VL0_3 3
128 #define IB_VL_VL0_7 4
129 #define IB_VL_VL0_14 5
131 static inline int qib_num_vls(int vls)
152 } __attribute__ ((packed));
154 struct ib_atomic_eth {
155 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
159 } __attribute__ ((packed));
161 struct qib_other_headers {
174 __be32 atomic_ack_eth[2];
178 struct ib_atomic_eth atomic_eth;
180 } __attribute__ ((packed));
183 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
184 * long (72 w/ imm_data). Only the first 56 bytes of the IB header
185 * will be in the eager header buffer. The remaining 12 or 16 bytes
186 * are in the data buffer.
188 struct qib_ib_header {
193 struct qib_other_headers oth;
195 struct qib_other_headers oth;
197 } __attribute__ ((packed));
199 struct qib_pio_header {
201 struct qib_ib_header hdr;
202 } __attribute__ ((packed));
205 * There is one struct qib_mcast for each multicast GID.
206 * All attached QPs are then stored as a list of
207 * struct qib_mcast_qp.
209 struct qib_mcast_qp {
210 struct list_head list;
215 struct rb_node rb_node;
217 struct list_head qp_list;
218 wait_queue_head_t wait;
223 /* Protection domain */
226 int user; /* non-zero if created from user space */
232 struct ib_ah_attr attr;
237 * This structure is used by qib_mmap() to validate an offset
238 * when an mmap() request is made. The vm_area_struct then uses
239 * this as its vm_private_data.
241 struct qib_mmap_info {
242 struct list_head pending_mmaps;
243 struct ib_ucontext *context;
251 * This structure is used to contain the head pointer, tail pointer,
252 * and completion queue entries as a single memory allocation so
253 * it can be mmap'ed into user space.
256 u32 head; /* index of next entry to fill */
257 u32 tail; /* index of next ib_poll_cq() entry */
259 /* these are actually size ibcq.cqe + 1 */
260 struct ib_uverbs_wc uqueue[0];
261 struct ib_wc kqueue[0];
266 * The completion queue structure.
270 struct work_struct comptask;
271 spinlock_t lock; /* protect changes in this struct */
274 struct qib_cq_wc *queue;
275 struct qib_mmap_info *ip;
279 * A segment is a linear region of low physical memory.
280 * XXX Maybe we should use phys addr here and kmap()/kunmap().
281 * Used by the verbs layer.
288 /* The number of qib_segs that fit in a page. */
289 #define QIB_SEGSZ (PAGE_SIZE / sizeof(struct qib_seg))
291 struct qib_segarray {
292 struct qib_seg segs[QIB_SEGSZ];
296 struct ib_pd *pd; /* shares refcnt of ibmr.pd */
297 u64 user_base; /* User's address for this region */
298 u64 iova; /* IB start address of this region */
301 u32 offset; /* offset (bytes) to start of region */
303 u32 max_segs; /* number of qib_segs in all the arrays */
304 u32 mapsz; /* size of the map array */
305 u8 page_shift; /* 0 - non unform/non powerof2 sizes */
306 u8 lkey_published; /* in global table */
307 struct completion comp; /* complete when refcount goes to zero */
309 struct qib_segarray *map[0]; /* the segments */
313 * These keep track of the copy progress within a memory region.
314 * Used by the verbs layer.
317 struct qib_mregion *mr;
318 void *vaddr; /* kernel virtual address of segment */
319 u32 sge_length; /* length of the SGE */
320 u32 length; /* remaining length of the segment */
321 u16 m; /* current index: mr->map[m] */
322 u16 n; /* current index: mr->map[m]->segs[n] */
328 struct ib_umem *umem;
329 struct qib_mregion mr; /* must be last */
333 * Send work request queue entry.
334 * The size of the sg_list is determined when the QP is created and stored
338 struct ib_send_wr wr; /* don't use wr.sg_list */
339 u32 psn; /* first packet sequence number */
340 u32 lpsn; /* last packet sequence number */
341 u32 ssn; /* send sequence number */
342 u32 length; /* total length of data in sg_list */
343 struct qib_sge sg_list[0];
347 * Receive work request queue entry.
348 * The size of the sg_list is determined when the QP (or SRQ) is created
349 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
354 struct ib_sge sg_list[0];
358 * This structure is used to contain the head pointer, tail pointer,
359 * and receive work queue entries as a single memory allocation so
360 * it can be mmap'ed into user space.
361 * Note that the wq array elements are variable size so you can't
362 * just index into the array to get the N'th element;
363 * use get_rwqe_ptr() instead.
366 u32 head; /* new work requests posted to the head */
367 u32 tail; /* receives pull requests from here. */
368 struct qib_rwqe wq[0];
373 u32 size; /* size of RWQE array */
375 spinlock_t lock /* protect changes in this struct */
376 ____cacheline_aligned_in_smp;
382 struct qib_mmap_info *ip;
383 /* send signal when number of RWQEs < limit */
387 struct qib_sge_state {
388 struct qib_sge *sg_list; /* next SGE to be used if any */
389 struct qib_sge sge; /* progress state for the current SGE */
395 * This structure holds the information that the send tasklet needs
396 * to send a RDMA read response or atomic operation.
398 struct qib_ack_entry {
404 struct qib_sge rdma_sge;
410 * Variables prefixed with s_ are for the requester (sender).
411 * Variables prefixed with r_ are for the responder (receiver).
412 * Variables prefixed with ack_ are for responder replies.
414 * Common variables are protected by both r_rq.lock and s_lock in that order
415 * which only happens in modify_qp() or changing the QP 'state'.
419 /* read mostly fields above and below */
420 struct ib_ah_attr remote_ah_attr;
421 struct ib_ah_attr alt_ah_attr;
422 struct qib_qp *next; /* link list for QPN hash table */
423 struct qib_swqe *s_wq; /* send work queue */
424 struct qib_mmap_info *ip;
425 struct qib_ib_header *s_hdr; /* next packet header to send */
426 unsigned long timeout_jiffies; /* computed from timeout */
428 enum ib_mtu path_mtu;
430 u32 pmtu; /* decoded from path_mtu */
431 u32 qkey; /* QKEY for this QP (for UD or RD) */
432 u32 s_size; /* send work queue size */
433 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
435 u8 state; /* QP state */
437 u8 alt_timeout; /* Alternate path timeout for this QP */
438 u8 timeout; /* Timeout for this QP */
442 u8 s_pkey_index; /* PKEY index to use */
443 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
444 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
445 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
446 u8 s_retry_cnt; /* number of times to retry */
448 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
449 u8 s_max_sge; /* size of s_wq->sg_list */
452 /* start of read/write fields */
454 atomic_t refcount ____cacheline_aligned_in_smp;
455 wait_queue_head_t wait;
458 struct qib_ack_entry s_ack_queue[QIB_MAX_RDMA_ATOMIC + 1]
459 ____cacheline_aligned_in_smp;
460 struct qib_sge_state s_rdma_read_sge;
462 spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
463 unsigned long r_aflags;
464 u64 r_wr_id; /* ID for current receive WQE */
465 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
466 u32 r_len; /* total length of r_sge */
467 u32 r_rcv_len; /* receive data len processed */
468 u32 r_psn; /* expected rcv packet sequence number */
469 u32 r_msn; /* message sequence number */
471 u8 r_state; /* opcode of last packet received */
473 u8 r_head_ack_queue; /* index into s_ack_queue[] */
475 struct list_head rspwait; /* link for waititing to respond */
477 struct qib_sge_state r_sge; /* current receive data */
478 struct qib_rq r_rq; /* receive work queue */
480 spinlock_t s_lock ____cacheline_aligned_in_smp;
481 struct qib_sge_state *s_cur_sge;
483 struct qib_verbs_txreq *s_tx;
484 struct qib_swqe *s_wqe;
485 struct qib_sge_state s_sge; /* current send request data */
486 struct qib_mregion *s_rdma_mr;
488 u32 s_cur_size; /* size of send packet in bytes */
489 u32 s_len; /* total length of s_sge */
490 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
491 u32 s_next_psn; /* PSN for next request */
492 u32 s_last_psn; /* last response PSN processed */
493 u32 s_sending_psn; /* lowest PSN that is being sent */
494 u32 s_sending_hpsn; /* highest PSN that is being sent */
495 u32 s_psn; /* current packet sequence number */
496 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
497 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
498 u32 s_head; /* new entries added here */
499 u32 s_tail; /* next entry to process */
500 u32 s_cur; /* current work queue entry */
501 u32 s_acked; /* last un-ACK'ed entry */
502 u32 s_last; /* last completed entry */
503 u32 s_ssn; /* SSN of tail entry */
504 u32 s_lsn; /* limit sequence number (credit) */
505 u16 s_hdrwords; /* size of s_hdr in 32 bit words */
507 u8 s_state; /* opcode of last packet sent */
508 u8 s_ack_state; /* opcode of packet to ACK */
509 u8 s_nak_state; /* non-zero if NAK is pending */
510 u8 r_nak_state; /* non-zero if NAK is pending */
511 u8 s_retry; /* requester retry counter */
512 u8 s_rnr_retry; /* requester RNR retry counter */
513 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
514 u8 s_tail_ack_queue; /* index into s_ack_queue[] */
516 struct qib_sge_state s_ack_rdma_sge;
517 struct timer_list s_timer;
518 struct list_head iowait; /* link for wait PIO buf */
520 struct work_struct s_work;
522 wait_queue_head_t wait_dma;
524 struct qib_sge r_sg_list[0] /* verified SGEs */
525 ____cacheline_aligned_in_smp;
529 * Atomic bit definitions for r_aflags.
531 #define QIB_R_WRID_VALID 0
532 #define QIB_R_REWIND_SGE 1
535 * Bit definitions for r_flags.
537 #define QIB_R_REUSE_SGE 0x01
538 #define QIB_R_RDMAR_SEQ 0x02
539 #define QIB_R_RSP_NAK 0x04
540 #define QIB_R_RSP_SEND 0x08
541 #define QIB_R_COMM_EST 0x10
544 * Bit definitions for s_flags.
546 * QIB_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
547 * QIB_S_BUSY - send tasklet is processing the QP
548 * QIB_S_TIMER - the RC retry timer is active
549 * QIB_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
550 * QIB_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
551 * before processing the next SWQE
552 * QIB_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
553 * before processing the next SWQE
554 * QIB_S_WAIT_RNR - waiting for RNR timeout
555 * QIB_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
556 * QIB_S_WAIT_DMA - waiting for send DMA queue to drain before generating
557 * next send completion entry not via send DMA
558 * QIB_S_WAIT_PIO - waiting for a send buffer to be available
559 * QIB_S_WAIT_TX - waiting for a struct qib_verbs_txreq to be available
560 * QIB_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
561 * QIB_S_WAIT_KMEM - waiting for kernel memory to be available
562 * QIB_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
563 * QIB_S_WAIT_ACK - waiting for an ACK packet before sending more requests
564 * QIB_S_SEND_ONE - send one packet, request ACK, then wait for ACK
566 #define QIB_S_SIGNAL_REQ_WR 0x0001
567 #define QIB_S_BUSY 0x0002
568 #define QIB_S_TIMER 0x0004
569 #define QIB_S_RESP_PENDING 0x0008
570 #define QIB_S_ACK_PENDING 0x0010
571 #define QIB_S_WAIT_FENCE 0x0020
572 #define QIB_S_WAIT_RDMAR 0x0040
573 #define QIB_S_WAIT_RNR 0x0080
574 #define QIB_S_WAIT_SSN_CREDIT 0x0100
575 #define QIB_S_WAIT_DMA 0x0200
576 #define QIB_S_WAIT_PIO 0x0400
577 #define QIB_S_WAIT_TX 0x0800
578 #define QIB_S_WAIT_DMA_DESC 0x1000
579 #define QIB_S_WAIT_KMEM 0x2000
580 #define QIB_S_WAIT_PSN 0x4000
581 #define QIB_S_WAIT_ACK 0x8000
582 #define QIB_S_SEND_ONE 0x10000
583 #define QIB_S_UNLIMITED_CREDIT 0x20000
586 * Wait flags that would prevent any packet type from being sent.
588 #define QIB_S_ANY_WAIT_IO (QIB_S_WAIT_PIO | QIB_S_WAIT_TX | \
589 QIB_S_WAIT_DMA_DESC | QIB_S_WAIT_KMEM)
592 * Wait flags that would prevent send work requests from making progress.
594 #define QIB_S_ANY_WAIT_SEND (QIB_S_WAIT_FENCE | QIB_S_WAIT_RDMAR | \
595 QIB_S_WAIT_RNR | QIB_S_WAIT_SSN_CREDIT | QIB_S_WAIT_DMA | \
596 QIB_S_WAIT_PSN | QIB_S_WAIT_ACK)
598 #define QIB_S_ANY_WAIT (QIB_S_ANY_WAIT_IO | QIB_S_ANY_WAIT_SEND)
600 #define QIB_PSN_CREDIT 16
603 * Since struct qib_swqe is not a fixed size, we can't simply index into
604 * struct qib_qp.s_wq. This function does the array index computation.
606 static inline struct qib_swqe *get_swqe_ptr(struct qib_qp *qp,
609 return (struct qib_swqe *)((char *)qp->s_wq +
610 (sizeof(struct qib_swqe) +
612 sizeof(struct qib_sge)) * n);
616 * Since struct qib_rwqe is not a fixed size, we can't simply index into
617 * struct qib_rwq.wq. This function does the array index computation.
619 static inline struct qib_rwqe *get_rwqe_ptr(struct qib_rq *rq, unsigned n)
621 return (struct qib_rwqe *)
622 ((char *) rq->wq->wq +
623 (sizeof(struct qib_rwqe) +
624 rq->max_sge * sizeof(struct ib_sge)) * n);
628 * QPN-map pages start out as NULL, they get allocated upon
629 * first use and are never deallocated. This way,
630 * large bitmaps are not allocated unless large numbers of QPs are used.
636 struct qib_qpn_table {
637 spinlock_t lock; /* protect changes in this struct */
638 unsigned flags; /* flags for QP0/1 allocated for each port */
639 u32 last; /* last QP number allocated */
640 u32 nmaps; /* size of the map table */
643 /* bit map of free QP numbers other than 0/1 */
644 struct qpn_map map[QPNMAP_ENTRIES];
647 struct qib_lkey_table {
648 spinlock_t lock; /* protect changes in this struct */
649 u32 next; /* next unused index (speeds search) */
650 u32 gen; /* generation count */
651 u32 max; /* size of the table */
652 struct qib_mregion **table;
655 struct qib_opcode_stats {
656 u64 n_packets; /* number of packets */
657 u64 n_bytes; /* total number of bytes */
663 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
664 struct qib_ah *sm_ah;
665 struct qib_ah *smi_ah;
666 struct rb_root mcast_tree;
667 spinlock_t lock; /* protect changes in this struct */
669 /* non-zero when timer is set */
670 unsigned long mkey_lease_timeout;
671 unsigned long trap_timeout;
672 __be64 gid_prefix; /* in network order */
674 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */
675 u64 tid; /* TID for traps */
676 u64 n_unicast_xmit; /* total unicast packets sent */
677 u64 n_unicast_rcv; /* total unicast packets received */
678 u64 n_multicast_xmit; /* total multicast packets sent */
679 u64 n_multicast_rcv; /* total multicast packets received */
680 u64 z_symbol_error_counter; /* starting count for PMA */
681 u64 z_link_error_recovery_counter; /* starting count for PMA */
682 u64 z_link_downed_counter; /* starting count for PMA */
683 u64 z_port_rcv_errors; /* starting count for PMA */
684 u64 z_port_rcv_remphys_errors; /* starting count for PMA */
685 u64 z_port_xmit_discards; /* starting count for PMA */
686 u64 z_port_xmit_data; /* starting count for PMA */
687 u64 z_port_rcv_data; /* starting count for PMA */
688 u64 z_port_xmit_packets; /* starting count for PMA */
689 u64 z_port_rcv_packets; /* starting count for PMA */
690 u32 z_local_link_integrity_errors; /* starting count for PMA */
691 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */
692 u32 z_vl15_dropped; /* starting count for PMA */
696 u32 n_rc_delayed_comp;
710 u32 pma_sample_start;
711 u32 pma_sample_interval;
712 __be16 pma_counter_select[5];
717 u16 mkey_lease_period;
726 struct qib_opcode_stats opstats[128];
730 struct ib_device ibdev;
731 struct list_head pending_mmaps;
732 spinlock_t mmap_offset_lock; /* protect mmap_offset */
734 struct qib_mregion *dma_mr;
736 /* QP numbers are shared by all IB ports */
737 struct qib_qpn_table qpn_table;
738 struct qib_lkey_table lk_table;
739 struct list_head piowait; /* list for wait PIO buf */
740 struct list_head dmawait; /* list for wait DMA */
741 struct list_head txwait; /* list for wait qib_verbs_txreq */
742 struct list_head memwait; /* list for wait kernel memory */
743 struct list_head txreq_free;
744 struct timer_list mem_timer;
745 struct qib_qp **qp_table;
746 struct qib_pio_header *pio_hdrs;
747 dma_addr_t pio_hdrs_phys;
748 /* list of QPs waiting for RNR timer */
749 spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */
750 u32 qp_table_size; /* size of the hash table */
751 u32 qp_rnd; /* random bytes for hash */
757 u32 n_pds_allocated; /* number of PDs allocated for device */
758 spinlock_t n_pds_lock;
759 u32 n_ahs_allocated; /* number of AHs allocated for device */
760 spinlock_t n_ahs_lock;
761 u32 n_cqs_allocated; /* number of CQs allocated for device */
762 spinlock_t n_cqs_lock;
763 u32 n_qps_allocated; /* number of QPs allocated for device */
764 spinlock_t n_qps_lock;
765 u32 n_srqs_allocated; /* number of SRQs allocated for device */
766 spinlock_t n_srqs_lock;
767 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
768 spinlock_t n_mcast_grps_lock;
771 struct qib_verbs_counters {
772 u64 symbol_error_counter;
773 u64 link_error_recovery_counter;
774 u64 link_downed_counter;
776 u64 port_rcv_remphys_errors;
777 u64 port_xmit_discards;
780 u64 port_xmit_packets;
781 u64 port_rcv_packets;
782 u32 local_link_integrity_errors;
783 u32 excessive_buffer_overrun_errors;
787 static inline struct qib_mr *to_imr(struct ib_mr *ibmr)
789 return container_of(ibmr, struct qib_mr, ibmr);
792 static inline struct qib_pd *to_ipd(struct ib_pd *ibpd)
794 return container_of(ibpd, struct qib_pd, ibpd);
797 static inline struct qib_ah *to_iah(struct ib_ah *ibah)
799 return container_of(ibah, struct qib_ah, ibah);
802 static inline struct qib_cq *to_icq(struct ib_cq *ibcq)
804 return container_of(ibcq, struct qib_cq, ibcq);
807 static inline struct qib_srq *to_isrq(struct ib_srq *ibsrq)
809 return container_of(ibsrq, struct qib_srq, ibsrq);
812 static inline struct qib_qp *to_iqp(struct ib_qp *ibqp)
814 return container_of(ibqp, struct qib_qp, ibqp);
817 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev)
819 return container_of(ibdev, struct qib_ibdev, ibdev);
823 * Send if not busy or waiting for I/O and either
824 * a RC response is pending or we can process send work requests.
826 static inline int qib_send_ok(struct qib_qp *qp)
828 return !(qp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT_IO)) &&
829 (qp->s_hdrwords || (qp->s_flags & QIB_S_RESP_PENDING) ||
830 !(qp->s_flags & QIB_S_ANY_WAIT_SEND));
833 extern struct workqueue_struct *qib_cq_wq;
836 * This must be called with s_lock held.
838 static inline void qib_schedule_send(struct qib_qp *qp)
841 queue_work(ib_wq, &qp->s_work);
844 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
846 u16 p1 = pkey1 & 0x7FFF;
847 u16 p2 = pkey2 & 0x7FFF;
850 * Low 15 bits must be non-zero and match, and
851 * one of the two must be a full member.
853 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0);
856 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
857 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
858 void qib_cap_mask_chg(struct qib_ibport *ibp);
859 void qib_sys_guid_chg(struct qib_ibport *ibp);
860 void qib_node_desc_chg(struct qib_ibport *ibp);
861 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
862 struct ib_wc *in_wc, struct ib_grh *in_grh,
863 struct ib_mad *in_mad, struct ib_mad *out_mad);
864 int qib_create_agents(struct qib_ibdev *dev);
865 void qib_free_agents(struct qib_ibdev *dev);
868 * Compare the lower 24 bits of the two values.
869 * Returns an integer <, ==, or > than zero.
871 static inline int qib_cmp24(u32 a, u32 b)
873 return (((int) a) - ((int) b)) << 8;
876 struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid);
878 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
879 u64 *rwords, u64 *spkts, u64 *rpkts,
882 int qib_get_counters(struct qib_pportdata *ppd,
883 struct qib_verbs_counters *cntrs);
885 int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
887 int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
889 int qib_mcast_tree_empty(struct qib_ibport *ibp);
891 __be32 qib_compute_aeth(struct qib_qp *qp);
893 struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn);
895 struct ib_qp *qib_create_qp(struct ib_pd *ibpd,
896 struct ib_qp_init_attr *init_attr,
897 struct ib_udata *udata);
899 int qib_destroy_qp(struct ib_qp *ibqp);
901 int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err);
903 int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
904 int attr_mask, struct ib_udata *udata);
906 int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
907 int attr_mask, struct ib_qp_init_attr *init_attr);
909 unsigned qib_free_all_qps(struct qib_devdata *dd);
911 void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt);
913 void qib_free_qpn_table(struct qib_qpn_table *qpt);
915 void qib_get_credit(struct qib_qp *qp, u32 aeth);
917 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
919 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
921 void qib_put_txreq(struct qib_verbs_txreq *tx);
923 int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr,
924 u32 hdrwords, struct qib_sge_state *ss, u32 len);
926 void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length,
929 void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release);
931 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
932 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
934 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
935 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
937 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
939 void qib_rc_rnr_retry(unsigned long arg);
941 void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr);
943 void qib_rc_error(struct qib_qp *qp, enum ib_wc_status err);
945 int qib_post_ud_send(struct qib_qp *qp, struct ib_send_wr *wr);
947 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
948 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
950 int qib_alloc_lkey(struct qib_mregion *mr, int dma_region);
952 void qib_free_lkey(struct qib_mregion *mr);
954 int qib_lkey_ok(struct qib_lkey_table *rkt, struct qib_pd *pd,
955 struct qib_sge *isge, struct ib_sge *sge, int acc);
957 int qib_rkey_ok(struct qib_qp *qp, struct qib_sge *sge,
958 u32 len, u64 vaddr, u32 rkey, int acc);
960 int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
961 struct ib_recv_wr **bad_wr);
963 struct ib_srq *qib_create_srq(struct ib_pd *ibpd,
964 struct ib_srq_init_attr *srq_init_attr,
965 struct ib_udata *udata);
967 int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
968 enum ib_srq_attr_mask attr_mask,
969 struct ib_udata *udata);
971 int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
973 int qib_destroy_srq(struct ib_srq *ibsrq);
975 void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig);
977 int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
979 struct ib_cq *qib_create_cq(struct ib_device *ibdev, int entries,
980 int comp_vector, struct ib_ucontext *context,
981 struct ib_udata *udata);
983 int qib_destroy_cq(struct ib_cq *ibcq);
985 int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
987 int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
989 struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc);
991 struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd,
992 struct ib_phys_buf *buffer_list,
993 int num_phys_buf, int acc, u64 *iova_start);
995 struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
996 u64 virt_addr, int mr_access_flags,
997 struct ib_udata *udata);
999 int qib_dereg_mr(struct ib_mr *ibmr);
1001 struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
1003 struct ib_fast_reg_page_list *qib_alloc_fast_reg_page_list(
1004 struct ib_device *ibdev, int page_list_len);
1006 void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl);
1008 int qib_fast_reg_mr(struct qib_qp *qp, struct ib_send_wr *wr);
1010 struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1011 struct ib_fmr_attr *fmr_attr);
1013 int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
1014 int list_len, u64 iova);
1016 int qib_unmap_fmr(struct list_head *fmr_list);
1018 int qib_dealloc_fmr(struct ib_fmr *ibfmr);
1020 static inline void qib_get_mr(struct qib_mregion *mr)
1022 atomic_inc(&mr->refcount);
1025 static inline void qib_put_mr(struct qib_mregion *mr)
1027 if (unlikely(atomic_dec_and_test(&mr->refcount)))
1028 complete(&mr->comp);
1031 static inline void qib_put_ss(struct qib_sge_state *ss)
1033 while (ss->num_sge) {
1034 qib_put_mr(ss->sge.mr);
1036 ss->sge = *ss->sg_list++;
1041 void qib_release_mmap_info(struct kref *ref);
1043 struct qib_mmap_info *qib_create_mmap_info(struct qib_ibdev *dev, u32 size,
1044 struct ib_ucontext *context,
1047 void qib_update_mmap_info(struct qib_ibdev *dev, struct qib_mmap_info *ip,
1048 u32 size, void *obj);
1050 int qib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
1052 int qib_get_rwqe(struct qib_qp *qp, int wr_id_only);
1054 void qib_migrate_qp(struct qib_qp *qp);
1056 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr,
1057 int has_grh, struct qib_qp *qp, u32 bth0);
1059 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
1060 struct ib_global_route *grh, u32 hwords, u32 nwords);
1062 void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr,
1063 u32 bth0, u32 bth2);
1065 void qib_do_send(struct work_struct *work);
1067 void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe,
1068 enum ib_wc_status status);
1070 void qib_send_rc_ack(struct qib_qp *qp);
1072 int qib_make_rc_req(struct qib_qp *qp);
1074 int qib_make_uc_req(struct qib_qp *qp);
1076 int qib_make_ud_req(struct qib_qp *qp);
1078 int qib_register_ib_device(struct qib_devdata *);
1080 void qib_unregister_ib_device(struct qib_devdata *);
1082 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
1084 void qib_ib_piobufavail(struct qib_devdata *);
1086 unsigned qib_get_npkeys(struct qib_devdata *);
1088 unsigned qib_get_pkey(struct qib_ibport *, unsigned);
1090 extern const enum ib_wc_opcode ib_qib_wc_opcode[];
1093 * Below HCA-independent IB PhysPortState values, returned
1094 * by the f_ibphys_portstate() routine.
1096 #define IB_PHYSPORTSTATE_SLEEP 1
1097 #define IB_PHYSPORTSTATE_POLL 2
1098 #define IB_PHYSPORTSTATE_DISABLED 3
1099 #define IB_PHYSPORTSTATE_CFG_TRAIN 4
1100 #define IB_PHYSPORTSTATE_LINKUP 5
1101 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
1102 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
1103 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB
1104 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
1105 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
1106 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
1107 #define IB_PHYSPORTSTATE_CFG_ENH 0x10
1108 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
1110 extern const int ib_qib_state_ops[];
1112 extern __be64 ib_qib_sys_image_guid; /* in network order */
1114 extern unsigned int ib_qib_lkey_table_size;
1116 extern unsigned int ib_qib_max_cqes;
1118 extern unsigned int ib_qib_max_cqs;
1120 extern unsigned int ib_qib_max_qp_wrs;
1122 extern unsigned int ib_qib_max_qps;
1124 extern unsigned int ib_qib_max_sges;
1126 extern unsigned int ib_qib_max_mcast_grps;
1128 extern unsigned int ib_qib_max_mcast_qp_attached;
1130 extern unsigned int ib_qib_max_srqs;
1132 extern unsigned int ib_qib_max_srq_sges;
1134 extern unsigned int ib_qib_max_srq_wrs;
1136 extern const u32 ib_qib_rnr_table[];
1138 extern struct ib_dma_mapping_ops qib_dma_mapping_ops;
1140 #endif /* QIB_VERBS_H */