2 * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved.
3 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
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/kthread.h>
45 #include <linux/completion.h>
46 #include <rdma/ib_pack.h>
47 #include <rdma/ib_user_verbs.h>
48 #include <rdma/rdma_vt.h>
53 struct qib_verbs_txreq;
55 #define QIB_MAX_RDMA_ATOMIC 16
56 #define QIB_GUIDS_PER_PORT 5
58 #define QPN_MAX (1 << 24)
59 #define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
62 * Increment this value if any changes that break userspace ABI
63 * compatibility are made.
65 #define QIB_UVERBS_ABI_VERSION 2
68 * Define an ib_cq_notify value that is not valid so we know when CQ
69 * notifications are armed.
71 #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
73 #define IB_SEQ_NAK (3 << 29)
75 /* AETH NAK opcode values */
76 #define IB_RNR_NAK 0x20
77 #define IB_NAK_PSN_ERROR 0x60
78 #define IB_NAK_INVALID_REQUEST 0x61
79 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
80 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
81 #define IB_NAK_INVALID_RD_REQUEST 0x64
83 /* Flags for checking QP state (see ib_qib_state_ops[]) */
84 #define QIB_POST_SEND_OK 0x01
85 #define QIB_POST_RECV_OK 0x02
86 #define QIB_PROCESS_RECV_OK 0x04
87 #define QIB_PROCESS_SEND_OK 0x08
88 #define QIB_PROCESS_NEXT_SEND_OK 0x10
89 #define QIB_FLUSH_SEND 0x20
90 #define QIB_FLUSH_RECV 0x40
91 #define QIB_PROCESS_OR_FLUSH_SEND \
92 (QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND)
94 /* IB Performance Manager status values */
95 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
96 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
97 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
99 /* Mandatory IB performance counter select values. */
100 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
101 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
102 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
103 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
104 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
106 #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0)
108 #define IB_BTH_REQ_ACK (1 << 31)
109 #define IB_BTH_SOLICITED (1 << 23)
110 #define IB_BTH_MIG_REQ (1 << 22)
112 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */
113 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26)
115 #define IB_GRH_VERSION 6
116 #define IB_GRH_VERSION_MASK 0xF
117 #define IB_GRH_VERSION_SHIFT 28
118 #define IB_GRH_TCLASS_MASK 0xFF
119 #define IB_GRH_TCLASS_SHIFT 20
120 #define IB_GRH_FLOW_MASK 0xFFFFF
121 #define IB_GRH_FLOW_SHIFT 0
122 #define IB_GRH_NEXT_HDR 0x1B
124 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
126 /* Values for set/get portinfo VLCap OperationalVLs */
128 #define IB_VL_VL0_1 2
129 #define IB_VL_VL0_3 3
130 #define IB_VL_VL0_7 4
131 #define IB_VL_VL0_14 5
133 static inline int qib_num_vls(int vls)
156 struct ib_atomic_eth {
157 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
163 struct qib_other_headers {
176 __be32 atomic_ack_eth[2];
180 struct ib_atomic_eth atomic_eth;
185 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
186 * long (72 w/ imm_data). Only the first 56 bytes of the IB header
187 * will be in the eager header buffer. The remaining 12 or 16 bytes
188 * are in the data buffer.
190 struct qib_ib_header {
195 struct qib_other_headers oth;
197 struct qib_other_headers oth;
201 struct qib_pio_header {
203 struct qib_ib_header hdr;
207 * There is one struct qib_mcast for each multicast GID.
208 * All attached QPs are then stored as a list of
209 * struct qib_mcast_qp.
211 struct qib_mcast_qp {
212 struct list_head list;
217 struct rb_node rb_node;
219 struct list_head qp_list;
220 wait_queue_head_t wait;
225 /* Protection domain */
228 int user; /* non-zero if created from user space */
234 struct ib_ah_attr attr;
239 * This structure is used by qib_mmap() to validate an offset
240 * when an mmap() request is made. The vm_area_struct then uses
241 * this as its vm_private_data.
243 struct qib_mmap_info {
244 struct list_head pending_mmaps;
245 struct ib_ucontext *context;
253 * This structure is used to contain the head pointer, tail pointer,
254 * and completion queue entries as a single memory allocation so
255 * it can be mmap'ed into user space.
258 u32 head; /* index of next entry to fill */
259 u32 tail; /* index of next ib_poll_cq() entry */
261 /* these are actually size ibcq.cqe + 1 */
262 struct ib_uverbs_wc uqueue[0];
263 struct ib_wc kqueue[0];
268 * The completion queue structure.
272 struct kthread_work comptask;
273 struct qib_devdata *dd;
274 spinlock_t lock; /* protect changes in this struct */
277 struct qib_cq_wc *queue;
278 struct qib_mmap_info *ip;
282 * A segment is a linear region of low physical memory.
283 * XXX Maybe we should use phys addr here and kmap()/kunmap().
284 * Used by the verbs layer.
291 /* The number of qib_segs that fit in a page. */
292 #define QIB_SEGSZ (PAGE_SIZE / sizeof(struct qib_seg))
294 struct qib_segarray {
295 struct qib_seg segs[QIB_SEGSZ];
299 struct ib_pd *pd; /* shares refcnt of ibmr.pd */
300 u64 user_base; /* User's address for this region */
301 u64 iova; /* IB start address of this region */
304 u32 offset; /* offset (bytes) to start of region */
306 u32 max_segs; /* number of qib_segs in all the arrays */
307 u32 mapsz; /* size of the map array */
308 u8 page_shift; /* 0 - non unform/non powerof2 sizes */
309 u8 lkey_published; /* in global table */
310 struct completion comp; /* complete when refcount goes to zero */
311 struct rcu_head list;
313 struct qib_segarray *map[0]; /* the segments */
317 * These keep track of the copy progress within a memory region.
318 * Used by the verbs layer.
321 struct qib_mregion *mr;
322 void *vaddr; /* kernel virtual address of segment */
323 u32 sge_length; /* length of the SGE */
324 u32 length; /* remaining length of the segment */
325 u16 m; /* current index: mr->map[m] */
326 u16 n; /* current index: mr->map[m]->segs[n] */
332 struct ib_umem *umem;
335 struct qib_mregion mr; /* must be last */
339 * Send work request queue entry.
340 * The size of the sg_list is determined when the QP is created and stored
345 struct ib_send_wr wr; /* don't use wr.sg_list */
346 struct ib_ud_wr ud_wr;
347 struct ib_reg_wr reg_wr;
348 struct ib_rdma_wr rdma_wr;
349 struct ib_atomic_wr atomic_wr;
351 u32 psn; /* first packet sequence number */
352 u32 lpsn; /* last packet sequence number */
353 u32 ssn; /* send sequence number */
354 u32 length; /* total length of data in sg_list */
355 struct qib_sge sg_list[0];
359 * Receive work request queue entry.
360 * The size of the sg_list is determined when the QP (or SRQ) is created
361 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
366 struct ib_sge sg_list[0];
370 * This structure is used to contain the head pointer, tail pointer,
371 * and receive work queue entries as a single memory allocation so
372 * it can be mmap'ed into user space.
373 * Note that the wq array elements are variable size so you can't
374 * just index into the array to get the N'th element;
375 * use get_rwqe_ptr() instead.
378 u32 head; /* new work requests posted to the head */
379 u32 tail; /* receives pull requests from here. */
380 struct qib_rwqe wq[0];
385 u32 size; /* size of RWQE array */
387 spinlock_t lock /* protect changes in this struct */
388 ____cacheline_aligned_in_smp;
394 struct qib_mmap_info *ip;
395 /* send signal when number of RWQEs < limit */
399 struct qib_sge_state {
400 struct qib_sge *sg_list; /* next SGE to be used if any */
401 struct qib_sge sge; /* progress state for the current SGE */
407 * This structure holds the information that the send tasklet needs
408 * to send a RDMA read response or atomic operation.
410 struct qib_ack_entry {
416 struct qib_sge rdma_sge;
422 * Variables prefixed with s_ are for the requester (sender).
423 * Variables prefixed with r_ are for the responder (receiver).
424 * Variables prefixed with ack_ are for responder replies.
426 * Common variables are protected by both r_rq.lock and s_lock in that order
427 * which only happens in modify_qp() or changing the QP 'state'.
431 /* read mostly fields above and below */
432 struct ib_ah_attr remote_ah_attr;
433 struct ib_ah_attr alt_ah_attr;
434 struct qib_qp __rcu *next; /* link list for QPN hash table */
435 struct qib_swqe *s_wq; /* send work queue */
436 struct qib_mmap_info *ip;
437 struct qib_ib_header *s_hdr; /* next packet header to send */
438 unsigned long timeout_jiffies; /* computed from timeout */
440 enum ib_mtu path_mtu;
442 u32 pmtu; /* decoded from path_mtu */
443 u32 qkey; /* QKEY for this QP (for UD or RD) */
444 u32 s_size; /* send work queue size */
445 u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
447 u8 state; /* QP state */
449 u8 alt_timeout; /* Alternate path timeout for this QP */
450 u8 timeout; /* Timeout for this QP */
454 u8 s_pkey_index; /* PKEY index to use */
455 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
456 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
457 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
458 u8 s_retry_cnt; /* number of times to retry */
460 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
461 u8 s_max_sge; /* size of s_wq->sg_list */
464 /* start of read/write fields */
466 atomic_t refcount ____cacheline_aligned_in_smp;
467 wait_queue_head_t wait;
470 struct qib_ack_entry s_ack_queue[QIB_MAX_RDMA_ATOMIC + 1]
471 ____cacheline_aligned_in_smp;
472 struct qib_sge_state s_rdma_read_sge;
474 spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
475 unsigned long r_aflags;
476 u64 r_wr_id; /* ID for current receive WQE */
477 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
478 u32 r_len; /* total length of r_sge */
479 u32 r_rcv_len; /* receive data len processed */
480 u32 r_psn; /* expected rcv packet sequence number */
481 u32 r_msn; /* message sequence number */
483 u8 r_state; /* opcode of last packet received */
485 u8 r_head_ack_queue; /* index into s_ack_queue[] */
487 struct list_head rspwait; /* link for waititing to respond */
489 struct qib_sge_state r_sge; /* current receive data */
490 struct qib_rq r_rq; /* receive work queue */
492 spinlock_t s_lock ____cacheline_aligned_in_smp;
493 struct qib_sge_state *s_cur_sge;
495 struct qib_verbs_txreq *s_tx;
496 struct qib_swqe *s_wqe;
497 struct qib_sge_state s_sge; /* current send request data */
498 struct qib_mregion *s_rdma_mr;
500 u32 s_cur_size; /* size of send packet in bytes */
501 u32 s_len; /* total length of s_sge */
502 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
503 u32 s_next_psn; /* PSN for next request */
504 u32 s_last_psn; /* last response PSN processed */
505 u32 s_sending_psn; /* lowest PSN that is being sent */
506 u32 s_sending_hpsn; /* highest PSN that is being sent */
507 u32 s_psn; /* current packet sequence number */
508 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
509 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
510 u32 s_head; /* new entries added here */
511 u32 s_tail; /* next entry to process */
512 u32 s_cur; /* current work queue entry */
513 u32 s_acked; /* last un-ACK'ed entry */
514 u32 s_last; /* last completed entry */
515 u32 s_ssn; /* SSN of tail entry */
516 u32 s_lsn; /* limit sequence number (credit) */
517 u16 s_hdrwords; /* size of s_hdr in 32 bit words */
519 u8 s_state; /* opcode of last packet sent */
520 u8 s_ack_state; /* opcode of packet to ACK */
521 u8 s_nak_state; /* non-zero if NAK is pending */
522 u8 r_nak_state; /* non-zero if NAK is pending */
523 u8 s_retry; /* requester retry counter */
524 u8 s_rnr_retry; /* requester RNR retry counter */
525 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
526 u8 s_tail_ack_queue; /* index into s_ack_queue[] */
528 struct qib_sge_state s_ack_rdma_sge;
529 struct timer_list s_timer;
530 struct list_head iowait; /* link for wait PIO buf */
532 struct work_struct s_work;
534 wait_queue_head_t wait_dma;
536 struct qib_sge r_sg_list[0] /* verified SGEs */
537 ____cacheline_aligned_in_smp;
541 * Atomic bit definitions for r_aflags.
543 #define QIB_R_WRID_VALID 0
544 #define QIB_R_REWIND_SGE 1
547 * Bit definitions for r_flags.
549 #define QIB_R_REUSE_SGE 0x01
550 #define QIB_R_RDMAR_SEQ 0x02
551 #define QIB_R_RSP_NAK 0x04
552 #define QIB_R_RSP_SEND 0x08
553 #define QIB_R_COMM_EST 0x10
556 * Bit definitions for s_flags.
558 * QIB_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
559 * QIB_S_BUSY - send tasklet is processing the QP
560 * QIB_S_TIMER - the RC retry timer is active
561 * QIB_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
562 * QIB_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
563 * before processing the next SWQE
564 * QIB_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
565 * before processing the next SWQE
566 * QIB_S_WAIT_RNR - waiting for RNR timeout
567 * QIB_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
568 * QIB_S_WAIT_DMA - waiting for send DMA queue to drain before generating
569 * next send completion entry not via send DMA
570 * QIB_S_WAIT_PIO - waiting for a send buffer to be available
571 * QIB_S_WAIT_TX - waiting for a struct qib_verbs_txreq to be available
572 * QIB_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
573 * QIB_S_WAIT_KMEM - waiting for kernel memory to be available
574 * QIB_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
575 * QIB_S_WAIT_ACK - waiting for an ACK packet before sending more requests
576 * QIB_S_SEND_ONE - send one packet, request ACK, then wait for ACK
578 #define QIB_S_SIGNAL_REQ_WR 0x0001
579 #define QIB_S_BUSY 0x0002
580 #define QIB_S_TIMER 0x0004
581 #define QIB_S_RESP_PENDING 0x0008
582 #define QIB_S_ACK_PENDING 0x0010
583 #define QIB_S_WAIT_FENCE 0x0020
584 #define QIB_S_WAIT_RDMAR 0x0040
585 #define QIB_S_WAIT_RNR 0x0080
586 #define QIB_S_WAIT_SSN_CREDIT 0x0100
587 #define QIB_S_WAIT_DMA 0x0200
588 #define QIB_S_WAIT_PIO 0x0400
589 #define QIB_S_WAIT_TX 0x0800
590 #define QIB_S_WAIT_DMA_DESC 0x1000
591 #define QIB_S_WAIT_KMEM 0x2000
592 #define QIB_S_WAIT_PSN 0x4000
593 #define QIB_S_WAIT_ACK 0x8000
594 #define QIB_S_SEND_ONE 0x10000
595 #define QIB_S_UNLIMITED_CREDIT 0x20000
598 * Wait flags that would prevent any packet type from being sent.
600 #define QIB_S_ANY_WAIT_IO (QIB_S_WAIT_PIO | QIB_S_WAIT_TX | \
601 QIB_S_WAIT_DMA_DESC | QIB_S_WAIT_KMEM)
604 * Wait flags that would prevent send work requests from making progress.
606 #define QIB_S_ANY_WAIT_SEND (QIB_S_WAIT_FENCE | QIB_S_WAIT_RDMAR | \
607 QIB_S_WAIT_RNR | QIB_S_WAIT_SSN_CREDIT | QIB_S_WAIT_DMA | \
608 QIB_S_WAIT_PSN | QIB_S_WAIT_ACK)
610 #define QIB_S_ANY_WAIT (QIB_S_ANY_WAIT_IO | QIB_S_ANY_WAIT_SEND)
612 #define QIB_PSN_CREDIT 16
615 * Since struct qib_swqe is not a fixed size, we can't simply index into
616 * struct qib_qp.s_wq. This function does the array index computation.
618 static inline struct qib_swqe *get_swqe_ptr(struct qib_qp *qp,
621 return (struct qib_swqe *)((char *)qp->s_wq +
622 (sizeof(struct qib_swqe) +
624 sizeof(struct qib_sge)) * n);
628 * Since struct qib_rwqe is not a fixed size, we can't simply index into
629 * struct qib_rwq.wq. This function does the array index computation.
631 static inline struct qib_rwqe *get_rwqe_ptr(struct qib_rq *rq, unsigned n)
633 return (struct qib_rwqe *)
634 ((char *) rq->wq->wq +
635 (sizeof(struct qib_rwqe) +
636 rq->max_sge * sizeof(struct ib_sge)) * n);
640 * QPN-map pages start out as NULL, they get allocated upon
641 * first use and are never deallocated. This way,
642 * large bitmaps are not allocated unless large numbers of QPs are used.
648 struct qib_qpn_table {
649 spinlock_t lock; /* protect changes in this struct */
650 unsigned flags; /* flags for QP0/1 allocated for each port */
651 u32 last; /* last QP number allocated */
652 u32 nmaps; /* size of the map table */
655 /* bit map of free QP numbers other than 0/1 */
656 struct qpn_map map[QPNMAP_ENTRIES];
659 #define MAX_LKEY_TABLE_BITS 23
661 struct qib_lkey_table {
662 spinlock_t lock; /* protect changes in this struct */
663 u32 next; /* next unused index (speeds search) */
664 u32 gen; /* generation count */
665 u32 max; /* size of the table */
666 struct qib_mregion __rcu **table;
669 struct qib_opcode_stats {
670 u64 n_packets; /* number of packets */
671 u64 n_bytes; /* total number of bytes */
674 struct qib_opcode_stats_perctx {
675 struct qib_opcode_stats stats[128];
678 struct qib_pma_counters {
679 u64 n_unicast_xmit; /* total unicast packets sent */
680 u64 n_unicast_rcv; /* total unicast packets received */
681 u64 n_multicast_xmit; /* total multicast packets sent */
682 u64 n_multicast_rcv; /* total multicast packets received */
686 struct qib_qp __rcu *qp0;
687 struct qib_qp __rcu *qp1;
688 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
689 struct qib_ah *sm_ah;
690 struct qib_ah *smi_ah;
691 struct rb_root mcast_tree;
692 spinlock_t lock; /* protect changes in this struct */
694 /* non-zero when timer is set */
695 unsigned long mkey_lease_timeout;
696 unsigned long trap_timeout;
697 __be64 gid_prefix; /* in network order */
699 __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */
700 u64 tid; /* TID for traps */
701 struct qib_pma_counters __percpu *pmastats;
702 u64 z_unicast_xmit; /* starting count for PMA */
703 u64 z_unicast_rcv; /* starting count for PMA */
704 u64 z_multicast_xmit; /* starting count for PMA */
705 u64 z_multicast_rcv; /* starting count for PMA */
706 u64 z_symbol_error_counter; /* starting count for PMA */
707 u64 z_link_error_recovery_counter; /* starting count for PMA */
708 u64 z_link_downed_counter; /* starting count for PMA */
709 u64 z_port_rcv_errors; /* starting count for PMA */
710 u64 z_port_rcv_remphys_errors; /* starting count for PMA */
711 u64 z_port_xmit_discards; /* starting count for PMA */
712 u64 z_port_xmit_data; /* starting count for PMA */
713 u64 z_port_rcv_data; /* starting count for PMA */
714 u64 z_port_xmit_packets; /* starting count for PMA */
715 u64 z_port_rcv_packets; /* starting count for PMA */
716 u32 z_local_link_integrity_errors; /* starting count for PMA */
717 u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */
718 u32 z_vl15_dropped; /* starting count for PMA */
722 u32 n_rc_delayed_comp;
736 u32 pma_sample_start;
737 u32 pma_sample_interval;
738 __be16 pma_counter_select[5];
743 u16 mkey_lease_period;
756 struct rvt_dev_info rdi;
757 struct list_head pending_mmaps;
758 spinlock_t mmap_offset_lock; /* protect mmap_offset */
760 struct qib_mregion __rcu *dma_mr;
762 /* QP numbers are shared by all IB ports */
763 struct qib_qpn_table qpn_table;
764 struct qib_lkey_table lk_table;
765 struct list_head piowait; /* list for wait PIO buf */
766 struct list_head dmawait; /* list for wait DMA */
767 struct list_head txwait; /* list for wait qib_verbs_txreq */
768 struct list_head memwait; /* list for wait kernel memory */
769 struct list_head txreq_free;
770 struct timer_list mem_timer;
771 struct qib_qp __rcu **qp_table;
772 struct qib_pio_header *pio_hdrs;
773 dma_addr_t pio_hdrs_phys;
774 /* list of QPs waiting for RNR timer */
775 spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */
776 u32 qp_table_size; /* size of the hash table */
777 u32 qp_rnd; /* random bytes for hash */
783 u32 n_pds_allocated; /* number of PDs allocated for device */
784 spinlock_t n_pds_lock;
785 u32 n_ahs_allocated; /* number of AHs allocated for device */
786 spinlock_t n_ahs_lock;
787 u32 n_cqs_allocated; /* number of CQs allocated for device */
788 spinlock_t n_cqs_lock;
789 u32 n_qps_allocated; /* number of QPs allocated for device */
790 spinlock_t n_qps_lock;
791 u32 n_srqs_allocated; /* number of SRQs allocated for device */
792 spinlock_t n_srqs_lock;
793 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
794 spinlock_t n_mcast_grps_lock;
795 #ifdef CONFIG_DEBUG_FS
796 /* per HCA debugfs */
797 struct dentry *qib_ibdev_dbg;
801 struct qib_verbs_counters {
802 u64 symbol_error_counter;
803 u64 link_error_recovery_counter;
804 u64 link_downed_counter;
806 u64 port_rcv_remphys_errors;
807 u64 port_xmit_discards;
810 u64 port_xmit_packets;
811 u64 port_rcv_packets;
812 u32 local_link_integrity_errors;
813 u32 excessive_buffer_overrun_errors;
817 static inline struct qib_mr *to_imr(struct ib_mr *ibmr)
819 return container_of(ibmr, struct qib_mr, ibmr);
822 static inline struct qib_pd *to_ipd(struct ib_pd *ibpd)
824 return container_of(ibpd, struct qib_pd, ibpd);
827 static inline struct qib_ah *to_iah(struct ib_ah *ibah)
829 return container_of(ibah, struct qib_ah, ibah);
832 static inline struct qib_cq *to_icq(struct ib_cq *ibcq)
834 return container_of(ibcq, struct qib_cq, ibcq);
837 static inline struct qib_srq *to_isrq(struct ib_srq *ibsrq)
839 return container_of(ibsrq, struct qib_srq, ibsrq);
842 static inline struct qib_qp *to_iqp(struct ib_qp *ibqp)
844 return container_of(ibqp, struct qib_qp, ibqp);
847 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev)
849 struct rvt_dev_info *rdi;
851 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
852 return container_of(rdi, struct qib_ibdev, rdi);
856 * Send if not busy or waiting for I/O and either
857 * a RC response is pending or we can process send work requests.
859 static inline int qib_send_ok(struct qib_qp *qp)
861 return !(qp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT_IO)) &&
862 (qp->s_hdrwords || (qp->s_flags & QIB_S_RESP_PENDING) ||
863 !(qp->s_flags & QIB_S_ANY_WAIT_SEND));
867 * This must be called with s_lock held.
869 void qib_schedule_send(struct qib_qp *qp);
871 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
873 u16 p1 = pkey1 & 0x7FFF;
874 u16 p2 = pkey2 & 0x7FFF;
877 * Low 15 bits must be non-zero and match, and
878 * one of the two must be a full member.
880 return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0);
883 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
884 u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
885 void qib_cap_mask_chg(struct qib_ibport *ibp);
886 void qib_sys_guid_chg(struct qib_ibport *ibp);
887 void qib_node_desc_chg(struct qib_ibport *ibp);
888 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
889 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
890 const struct ib_mad_hdr *in, size_t in_mad_size,
891 struct ib_mad_hdr *out, size_t *out_mad_size,
892 u16 *out_mad_pkey_index);
893 int qib_create_agents(struct qib_ibdev *dev);
894 void qib_free_agents(struct qib_ibdev *dev);
897 * Compare the lower 24 bits of the two values.
898 * Returns an integer <, ==, or > than zero.
900 static inline int qib_cmp24(u32 a, u32 b)
902 return (((int) a) - ((int) b)) << 8;
905 struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid);
907 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
908 u64 *rwords, u64 *spkts, u64 *rpkts,
911 int qib_get_counters(struct qib_pportdata *ppd,
912 struct qib_verbs_counters *cntrs);
914 int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
916 int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
918 int qib_mcast_tree_empty(struct qib_ibport *ibp);
920 __be32 qib_compute_aeth(struct qib_qp *qp);
922 struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn);
924 struct ib_qp *qib_create_qp(struct ib_pd *ibpd,
925 struct ib_qp_init_attr *init_attr,
926 struct ib_udata *udata);
928 int qib_destroy_qp(struct ib_qp *ibqp);
930 int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err);
932 int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
933 int attr_mask, struct ib_udata *udata);
935 int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
936 int attr_mask, struct ib_qp_init_attr *init_attr);
938 unsigned qib_free_all_qps(struct qib_devdata *dd);
940 void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt);
942 void qib_free_qpn_table(struct qib_qpn_table *qpt);
944 #ifdef CONFIG_DEBUG_FS
948 struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev);
950 int qib_qp_iter_next(struct qib_qp_iter *iter);
952 void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter);
956 void qib_get_credit(struct qib_qp *qp, u32 aeth);
958 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
960 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
962 void qib_put_txreq(struct qib_verbs_txreq *tx);
964 int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr,
965 u32 hdrwords, struct qib_sge_state *ss, u32 len);
967 void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length,
970 void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release);
972 void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
973 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
975 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
976 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
978 int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
980 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
982 void qib_rc_rnr_retry(unsigned long arg);
984 void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr);
986 void qib_rc_error(struct qib_qp *qp, enum ib_wc_status err);
988 int qib_post_ud_send(struct qib_qp *qp, struct ib_send_wr *wr);
990 void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
991 int has_grh, void *data, u32 tlen, struct qib_qp *qp);
993 int qib_alloc_lkey(struct qib_mregion *mr, int dma_region);
995 void qib_free_lkey(struct qib_mregion *mr);
997 int qib_lkey_ok(struct qib_lkey_table *rkt, struct qib_pd *pd,
998 struct qib_sge *isge, struct ib_sge *sge, int acc);
1000 int qib_rkey_ok(struct qib_qp *qp, struct qib_sge *sge,
1001 u32 len, u64 vaddr, u32 rkey, int acc);
1003 int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
1004 struct ib_recv_wr **bad_wr);
1006 struct ib_srq *qib_create_srq(struct ib_pd *ibpd,
1007 struct ib_srq_init_attr *srq_init_attr,
1008 struct ib_udata *udata);
1010 int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
1011 enum ib_srq_attr_mask attr_mask,
1012 struct ib_udata *udata);
1014 int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
1016 int qib_destroy_srq(struct ib_srq *ibsrq);
1018 int qib_cq_init(struct qib_devdata *dd);
1020 void qib_cq_exit(struct qib_devdata *dd);
1022 void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig);
1024 int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
1026 struct ib_cq *qib_create_cq(struct ib_device *ibdev,
1027 const struct ib_cq_init_attr *attr,
1028 struct ib_ucontext *context,
1029 struct ib_udata *udata);
1031 int qib_destroy_cq(struct ib_cq *ibcq);
1033 int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
1035 int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
1037 struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc);
1039 struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
1040 u64 virt_addr, int mr_access_flags,
1041 struct ib_udata *udata);
1043 int qib_dereg_mr(struct ib_mr *ibmr);
1045 struct ib_mr *qib_alloc_mr(struct ib_pd *pd,
1046 enum ib_mr_type mr_type,
1049 int qib_map_mr_sg(struct ib_mr *ibmr,
1050 struct scatterlist *sg,
1053 int qib_reg_mr(struct qib_qp *qp, struct ib_reg_wr *wr);
1055 struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1056 struct ib_fmr_attr *fmr_attr);
1058 int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
1059 int list_len, u64 iova);
1061 int qib_unmap_fmr(struct list_head *fmr_list);
1063 int qib_dealloc_fmr(struct ib_fmr *ibfmr);
1065 static inline void qib_get_mr(struct qib_mregion *mr)
1067 atomic_inc(&mr->refcount);
1070 void mr_rcu_callback(struct rcu_head *list);
1072 static inline void qib_put_mr(struct qib_mregion *mr)
1074 if (unlikely(atomic_dec_and_test(&mr->refcount)))
1075 call_rcu(&mr->list, mr_rcu_callback);
1078 static inline void qib_put_ss(struct qib_sge_state *ss)
1080 while (ss->num_sge) {
1081 qib_put_mr(ss->sge.mr);
1083 ss->sge = *ss->sg_list++;
1088 void qib_release_mmap_info(struct kref *ref);
1090 struct qib_mmap_info *qib_create_mmap_info(struct qib_ibdev *dev, u32 size,
1091 struct ib_ucontext *context,
1094 void qib_update_mmap_info(struct qib_ibdev *dev, struct qib_mmap_info *ip,
1095 u32 size, void *obj);
1097 int qib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
1099 int qib_get_rwqe(struct qib_qp *qp, int wr_id_only);
1101 void qib_migrate_qp(struct qib_qp *qp);
1103 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr,
1104 int has_grh, struct qib_qp *qp, u32 bth0);
1106 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
1107 struct ib_global_route *grh, u32 hwords, u32 nwords);
1109 void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr,
1110 u32 bth0, u32 bth2);
1112 void qib_do_send(struct work_struct *work);
1114 void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe,
1115 enum ib_wc_status status);
1117 void qib_send_rc_ack(struct qib_qp *qp);
1119 int qib_make_rc_req(struct qib_qp *qp);
1121 int qib_make_uc_req(struct qib_qp *qp);
1123 int qib_make_ud_req(struct qib_qp *qp);
1125 int qib_register_ib_device(struct qib_devdata *);
1127 void qib_unregister_ib_device(struct qib_devdata *);
1129 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
1131 void qib_ib_piobufavail(struct qib_devdata *);
1133 unsigned qib_get_npkeys(struct qib_devdata *);
1135 unsigned qib_get_pkey(struct qib_ibport *, unsigned);
1137 extern const enum ib_wc_opcode ib_qib_wc_opcode[];
1140 * Below HCA-independent IB PhysPortState values, returned
1141 * by the f_ibphys_portstate() routine.
1143 #define IB_PHYSPORTSTATE_SLEEP 1
1144 #define IB_PHYSPORTSTATE_POLL 2
1145 #define IB_PHYSPORTSTATE_DISABLED 3
1146 #define IB_PHYSPORTSTATE_CFG_TRAIN 4
1147 #define IB_PHYSPORTSTATE_LINKUP 5
1148 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
1149 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
1150 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB
1151 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
1152 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
1153 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
1154 #define IB_PHYSPORTSTATE_CFG_ENH 0x10
1155 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
1157 extern const int ib_qib_state_ops[];
1159 extern __be64 ib_qib_sys_image_guid; /* in network order */
1161 extern unsigned int ib_qib_lkey_table_size;
1163 extern unsigned int ib_qib_max_cqes;
1165 extern unsigned int ib_qib_max_cqs;
1167 extern unsigned int ib_qib_max_qp_wrs;
1169 extern unsigned int ib_qib_max_qps;
1171 extern unsigned int ib_qib_max_sges;
1173 extern unsigned int ib_qib_max_mcast_grps;
1175 extern unsigned int ib_qib_max_mcast_qp_attached;
1177 extern unsigned int ib_qib_max_srqs;
1179 extern unsigned int ib_qib_max_srq_sges;
1181 extern unsigned int ib_qib_max_srq_wrs;
1183 extern const u32 ib_qib_rnr_table[];
1185 #endif /* QIB_VERBS_H */