Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 711 insertions, 0 deletions

diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
new file mode 100644
index 000000000..927f6d5b6
--- /dev/null
+++ b/include/rdma/rdmavt_qp.h
@@ -0,0 +1,711 @@
+#ifndef DEF_RDMAVT_INCQP_H
+#define DEF_RDMAVT_INCQP_H
+
+/*
+ * Copyright(c) 2016 - 2018 Intel Corporation.
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  - Neither the name of Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rdma/rdma_vt.h>
+#include <rdma/ib_pack.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/rdmavt_cq.h>
+/*
+ * Atomic bit definitions for r_aflags.
+ */
+#define RVT_R_WRID_VALID        0
+#define RVT_R_REWIND_SGE        1
+
+/*
+ * Bit definitions for r_flags.
+ */
+#define RVT_R_REUSE_SGE 0x01
+#define RVT_R_RDMAR_SEQ 0x02
+#define RVT_R_RSP_NAK   0x04
+#define RVT_R_RSP_SEND  0x08
+#define RVT_R_COMM_EST  0x10
+
+/*
+ * Bit definitions for s_flags.
+ *
+ * RVT_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
+ * RVT_S_BUSY - send tasklet is processing the QP
+ * RVT_S_TIMER - the RC retry timer is active
+ * RVT_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
+ * RVT_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
+ *                         before processing the next SWQE
+ * RVT_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
+ *                         before processing the next SWQE
+ * RVT_S_WAIT_RNR - waiting for RNR timeout
+ * RVT_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
+ * RVT_S_WAIT_DMA - waiting for send DMA queue to drain before generating
+ *                  next send completion entry not via send DMA
+ * RVT_S_WAIT_PIO - waiting for a send buffer to be available
+ * RVT_S_WAIT_PIO_DRAIN - waiting for a qp to drain pio packets
+ * RVT_S_WAIT_TX - waiting for a struct verbs_txreq to be available
+ * RVT_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
+ * RVT_S_WAIT_KMEM - waiting for kernel memory to be available
+ * RVT_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
+ * RVT_S_WAIT_ACK - waiting for an ACK packet before sending more requests
+ * RVT_S_SEND_ONE - send one packet, request ACK, then wait for ACK
+ * RVT_S_ECN - a BECN was queued to the send engine
+ * RVT_S_MAX_BIT_MASK - The max bit that can be used by rdmavt
+ */
+#define RVT_S_SIGNAL_REQ_WR	0x0001
+#define RVT_S_BUSY		0x0002
+#define RVT_S_TIMER		0x0004
+#define RVT_S_RESP_PENDING	0x0008
+#define RVT_S_ACK_PENDING	0x0010
+#define RVT_S_WAIT_FENCE	0x0020
+#define RVT_S_WAIT_RDMAR	0x0040
+#define RVT_S_WAIT_RNR		0x0080
+#define RVT_S_WAIT_SSN_CREDIT	0x0100
+#define RVT_S_WAIT_DMA		0x0200
+#define RVT_S_WAIT_PIO		0x0400
+#define RVT_S_WAIT_TX		0x0800
+#define RVT_S_WAIT_DMA_DESC	0x1000
+#define RVT_S_WAIT_KMEM		0x2000
+#define RVT_S_WAIT_PSN		0x4000
+#define RVT_S_WAIT_ACK		0x8000
+#define RVT_S_SEND_ONE		0x10000
+#define RVT_S_UNLIMITED_CREDIT	0x20000
+#define RVT_S_ECN		0x40000
+#define RVT_S_MAX_BIT_MASK	0x800000
+
+/*
+ * Drivers should use s_flags starting with bit 31 down to the bit next to
+ * RVT_S_MAX_BIT_MASK
+ */
+
+/*
+ * Wait flags that would prevent any packet type from being sent.
+ */
+#define RVT_S_ANY_WAIT_IO \
+	(RVT_S_WAIT_PIO | RVT_S_WAIT_TX | \
+	 RVT_S_WAIT_DMA_DESC | RVT_S_WAIT_KMEM)
+
+/*
+ * Wait flags that would prevent send work requests from making progress.
+ */
+#define RVT_S_ANY_WAIT_SEND (RVT_S_WAIT_FENCE | RVT_S_WAIT_RDMAR | \
+	RVT_S_WAIT_RNR | RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA | \
+	RVT_S_WAIT_PSN | RVT_S_WAIT_ACK)
+
+#define RVT_S_ANY_WAIT (RVT_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
+
+/* Number of bits to pay attention to in the opcode for checking qp type */
+#define RVT_OPCODE_QP_MASK 0xE0
+
+/* Flags for checking QP state (see ib_rvt_state_ops[]) */
+#define RVT_POST_SEND_OK                0x01
+#define RVT_POST_RECV_OK                0x02
+#define RVT_PROCESS_RECV_OK             0x04
+#define RVT_PROCESS_SEND_OK             0x08
+#define RVT_PROCESS_NEXT_SEND_OK        0x10
+#define RVT_FLUSH_SEND			0x20
+#define RVT_FLUSH_RECV			0x40
+#define RVT_PROCESS_OR_FLUSH_SEND \
+	(RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND)
+#define RVT_SEND_OR_FLUSH_OR_RECV_OK \
+	(RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND | RVT_PROCESS_RECV_OK)
+
+/*
+ * Internal send flags
+ */
+#define RVT_SEND_RESERVE_USED           IB_SEND_RESERVED_START
+#define RVT_SEND_COMPLETION_ONLY	(IB_SEND_RESERVED_START << 1)
+
+/*
+ * Send work request queue entry.
+ * The size of the sg_list is determined when the QP is created and stored
+ * in qp->s_max_sge.
+ */
+struct rvt_swqe {
+	union {
+		struct ib_send_wr wr;   /* don't use wr.sg_list */
+		struct ib_ud_wr ud_wr;
+		struct ib_reg_wr reg_wr;
+		struct ib_rdma_wr rdma_wr;
+		struct ib_atomic_wr atomic_wr;
+	};
+	u32 psn;                /* first packet sequence number */
+	u32 lpsn;               /* last packet sequence number */
+	u32 ssn;                /* send sequence number */
+	u32 length;             /* total length of data in sg_list */
+	struct rvt_sge sg_list[0];
+};
+
+/*
+ * Receive work request queue entry.
+ * The size of the sg_list is determined when the QP (or SRQ) is created
+ * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
+ */
+struct rvt_rwqe {
+	u64 wr_id;
+	u8 num_sge;
+	struct ib_sge sg_list[0];
+};
+
+/*
+ * This structure is used to contain the head pointer, tail pointer,
+ * and receive work queue entries as a single memory allocation so
+ * it can be mmap'ed into user space.
+ * Note that the wq array elements are variable size so you can't
+ * just index into the array to get the N'th element;
+ * use get_rwqe_ptr() instead.
+ */
+struct rvt_rwq {
+	u32 head;               /* new work requests posted to the head */
+	u32 tail;               /* receives pull requests from here. */
+	struct rvt_rwqe wq[0];
+};
+
+struct rvt_rq {
+	struct rvt_rwq *wq;
+	u32 size;               /* size of RWQE array */
+	u8 max_sge;
+	/* protect changes in this struct */
+	spinlock_t lock ____cacheline_aligned_in_smp;
+};
+
+/*
+ * This structure is used by rvt_mmap() to validate an offset
+ * when an mmap() request is made.  The vm_area_struct then uses
+ * this as its vm_private_data.
+ */
+struct rvt_mmap_info {
+	struct list_head pending_mmaps;
+	struct ib_ucontext *context;
+	void *obj;
+	__u64 offset;
+	struct kref ref;
+	unsigned size;
+};
+
+/*
+ * This structure holds the information that the send tasklet needs
+ * to send a RDMA read response or atomic operation.
+ */
+struct rvt_ack_entry {
+	struct rvt_sge rdma_sge;
+	u64 atomic_data;
+	u32 psn;
+	u32 lpsn;
+	u8 opcode;
+	u8 sent;
+};
+
+#define	RC_QP_SCALING_INTERVAL	5
+
+#define RVT_OPERATION_PRIV        0x00000001
+#define RVT_OPERATION_ATOMIC      0x00000002
+#define RVT_OPERATION_ATOMIC_SGE  0x00000004
+#define RVT_OPERATION_LOCAL       0x00000008
+#define RVT_OPERATION_USE_RESERVE 0x00000010
+
+#define RVT_OPERATION_MAX (IB_WR_RESERVED10 + 1)
+
+/**
+ * rvt_operation_params - op table entry
+ * @length - the length to copy into the swqe entry
+ * @qpt_support - a bit mask indicating QP type support
+ * @flags - RVT_OPERATION flags (see above)
+ *
+ * This supports table driven post send so that
+ * the driver can have differing an potentially
+ * different sets of operations.
+ *
+ **/
+
+struct rvt_operation_params {
+	size_t length;
+	u32 qpt_support;
+	u32 flags;
+};
+
+/*
+ * Common variables are protected by both r_rq.lock and s_lock in that order
+ * which only happens in modify_qp() or changing the QP 'state'.
+ */
+struct rvt_qp {
+	struct ib_qp ibqp;
+	void *priv; /* Driver private data */
+	/* read mostly fields above and below */
+	struct rdma_ah_attr remote_ah_attr;
+	struct rdma_ah_attr alt_ah_attr;
+	struct rvt_qp __rcu *next;           /* link list for QPN hash table */
+	struct rvt_swqe *s_wq;  /* send work queue */
+	struct rvt_mmap_info *ip;
+
+	unsigned long timeout_jiffies;  /* computed from timeout */
+
+	int srate_mbps;		/* s_srate (below) converted to Mbit/s */
+	pid_t pid;		/* pid for user mode QPs */
+	u32 remote_qpn;
+	u32 qkey;               /* QKEY for this QP (for UD or RD) */
+	u32 s_size;             /* send work queue size */
+
+	u16 pmtu;		/* decoded from path_mtu */
+	u8 log_pmtu;		/* shift for pmtu */
+	u8 state;               /* QP state */
+	u8 allowed_ops;		/* high order bits of allowed opcodes */
+	u8 qp_access_flags;
+	u8 alt_timeout;         /* Alternate path timeout for this QP */
+	u8 timeout;             /* Timeout for this QP */
+	u8 s_srate;
+	u8 s_mig_state;
+	u8 port_num;
+	u8 s_pkey_index;        /* PKEY index to use */
+	u8 s_alt_pkey_index;    /* Alternate path PKEY index to use */
+	u8 r_max_rd_atomic;     /* max number of RDMA read/atomic to receive */
+	u8 s_max_rd_atomic;     /* max number of RDMA read/atomic to send */
+	u8 s_retry_cnt;         /* number of times to retry */
+	u8 s_rnr_retry_cnt;
+	u8 r_min_rnr_timer;     /* retry timeout value for RNR NAKs */
+	u8 s_max_sge;           /* size of s_wq->sg_list */
+	u8 s_draining;
+
+	/* start of read/write fields */
+	atomic_t refcount ____cacheline_aligned_in_smp;
+	wait_queue_head_t wait;
+
+	struct rvt_ack_entry *s_ack_queue;
+	struct rvt_sge_state s_rdma_read_sge;
+
+	spinlock_t r_lock ____cacheline_aligned_in_smp;      /* used for APM */
+	u32 r_psn;              /* expected rcv packet sequence number */
+	unsigned long r_aflags;
+	u64 r_wr_id;            /* ID for current receive WQE */
+	u32 r_ack_psn;          /* PSN for next ACK or atomic ACK */
+	u32 r_len;              /* total length of r_sge */
+	u32 r_rcv_len;          /* receive data len processed */
+	u32 r_msn;              /* message sequence number */
+
+	u8 r_state;             /* opcode of last packet received */
+	u8 r_flags;
+	u8 r_head_ack_queue;    /* index into s_ack_queue[] */
+	u8 r_adefered;          /* defered ack count */
+
+	struct list_head rspwait;       /* link for waiting to respond */
+
+	struct rvt_sge_state r_sge;     /* current receive data */
+	struct rvt_rq r_rq;             /* receive work queue */
+
+	/* post send line */
+	spinlock_t s_hlock ____cacheline_aligned_in_smp;
+	u32 s_head;             /* new entries added here */
+	u32 s_next_psn;         /* PSN for next request */
+	u32 s_avail;            /* number of entries avail */
+	u32 s_ssn;              /* SSN of tail entry */
+	atomic_t s_reserved_used; /* reserved entries in use */
+
+	spinlock_t s_lock ____cacheline_aligned_in_smp;
+	u32 s_flags;
+	struct rvt_sge_state *s_cur_sge;
+	struct rvt_swqe *s_wqe;
+	struct rvt_sge_state s_sge;     /* current send request data */
+	struct rvt_mregion *s_rdma_mr;
+	u32 s_len;              /* total length of s_sge */
+	u32 s_rdma_read_len;    /* total length of s_rdma_read_sge */
+	u32 s_last_psn;         /* last response PSN processed */
+	u32 s_sending_psn;      /* lowest PSN that is being sent */
+	u32 s_sending_hpsn;     /* highest PSN that is being sent */
+	u32 s_psn;              /* current packet sequence number */
+	u32 s_ack_rdma_psn;     /* PSN for sending RDMA read responses */
+	u32 s_ack_psn;          /* PSN for acking sends and RDMA writes */
+	u32 s_tail;             /* next entry to process */
+	u32 s_cur;              /* current work queue entry */
+	u32 s_acked;            /* last un-ACK'ed entry */
+	u32 s_last;             /* last completed entry */
+	u32 s_lsn;              /* limit sequence number (credit) */
+	u32 s_ahgpsn;           /* set to the psn in the copy of the header */
+	u16 s_cur_size;         /* size of send packet in bytes */
+	u16 s_rdma_ack_cnt;
+	u8 s_hdrwords;         /* size of s_hdr in 32 bit words */
+	s8 s_ahgidx;
+	u8 s_state;             /* opcode of last packet sent */
+	u8 s_ack_state;         /* opcode of packet to ACK */
+	u8 s_nak_state;         /* non-zero if NAK is pending */
+	u8 r_nak_state;         /* non-zero if NAK is pending */
+	u8 s_retry;             /* requester retry counter */
+	u8 s_rnr_retry;         /* requester RNR retry counter */
+	u8 s_num_rd_atomic;     /* number of RDMA read/atomic pending */
+	u8 s_tail_ack_queue;    /* index into s_ack_queue[] */
+
+	struct rvt_sge_state s_ack_rdma_sge;
+	struct timer_list s_timer;
+	struct hrtimer s_rnr_timer;
+
+	atomic_t local_ops_pending; /* number of fast_reg/local_inv reqs */
+
+	/*
+	 * This sge list MUST be last. Do not add anything below here.
+	 */
+	struct rvt_sge r_sg_list[0] /* verified SGEs */
+		____cacheline_aligned_in_smp;
+};
+
+struct rvt_srq {
+	struct ib_srq ibsrq;
+	struct rvt_rq rq;
+	struct rvt_mmap_info *ip;
+	/* send signal when number of RWQEs < limit */
+	u32 limit;
+};
+
+#define RVT_QPN_MAX                 BIT(24)
+#define RVT_QPNMAP_ENTRIES          (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
+#define RVT_BITS_PER_PAGE           (PAGE_SIZE * BITS_PER_BYTE)
+#define RVT_BITS_PER_PAGE_MASK      (RVT_BITS_PER_PAGE - 1)
+#define RVT_QPN_MASK		    IB_QPN_MASK
+
+/*
+ * QPN-map pages start out as NULL, they get allocated upon
+ * first use and are never deallocated. This way,
+ * large bitmaps are not allocated unless large numbers of QPs are used.
+ */
+struct rvt_qpn_map {
+	void *page;
+};
+
+struct rvt_qpn_table {
+	spinlock_t lock; /* protect changes to the qp table */
+	unsigned flags;         /* flags for QP0/1 allocated for each port */
+	u32 last;               /* last QP number allocated */
+	u32 nmaps;              /* size of the map table */
+	u16 limit;
+	u8  incr;
+	/* bit map of free QP numbers other than 0/1 */
+	struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
+};
+
+struct rvt_qp_ibdev {
+	u32 qp_table_size;
+	u32 qp_table_bits;
+	struct rvt_qp __rcu **qp_table;
+	spinlock_t qpt_lock; /* qptable lock */
+	struct rvt_qpn_table qpn_table;
+};
+
+/*
+ * There is one struct rvt_mcast for each multicast GID.
+ * All attached QPs are then stored as a list of
+ * struct rvt_mcast_qp.
+ */
+struct rvt_mcast_qp {
+	struct list_head list;
+	struct rvt_qp *qp;
+};
+
+struct rvt_mcast_addr {
+	union ib_gid mgid;
+	u16 lid;
+};
+
+struct rvt_mcast {
+	struct rb_node rb_node;
+	struct rvt_mcast_addr mcast_addr;
+	struct list_head qp_list;
+	wait_queue_head_t wait;
+	atomic_t refcount;
+	int n_attached;
+};
+
+/*
+ * Since struct rvt_swqe is not a fixed size, we can't simply index into
+ * struct rvt_qp.s_wq.  This function does the array index computation.
+ */
+static inline struct rvt_swqe *rvt_get_swqe_ptr(struct rvt_qp *qp,
+						unsigned n)
+{
+	return (struct rvt_swqe *)((char *)qp->s_wq +
+				     (sizeof(struct rvt_swqe) +
+				      qp->s_max_sge *
+				      sizeof(struct rvt_sge)) * n);
+}
+
+/*
+ * Since struct rvt_rwqe is not a fixed size, we can't simply index into
+ * struct rvt_rwq.wq.  This function does the array index computation.
+ */
+static inline struct rvt_rwqe *rvt_get_rwqe_ptr(struct rvt_rq *rq, unsigned n)
+{
+	return (struct rvt_rwqe *)
+		((char *)rq->wq->wq +
+		 (sizeof(struct rvt_rwqe) +
+		  rq->max_sge * sizeof(struct ib_sge)) * n);
+}
+
+/**
+ * rvt_is_user_qp - return if this is user mode QP
+ * @qp - the target QP
+ */
+static inline bool rvt_is_user_qp(struct rvt_qp *qp)
+{
+	return !!qp->pid;
+}
+
+/**
+ * rvt_get_qp - get a QP reference
+ * @qp - the QP to hold
+ */
+static inline void rvt_get_qp(struct rvt_qp *qp)
+{
+	atomic_inc(&qp->refcount);
+}
+
+/**
+ * rvt_put_qp - release a QP reference
+ * @qp - the QP to release
+ */
+static inline void rvt_put_qp(struct rvt_qp *qp)
+{
+	if (qp && atomic_dec_and_test(&qp->refcount))
+		wake_up(&qp->wait);
+}
+
+/**
+ * rvt_put_swqe - drop mr refs held by swqe
+ * @wqe - the send wqe
+ *
+ * This drops any mr references held by the swqe
+ */
+static inline void rvt_put_swqe(struct rvt_swqe *wqe)
+{
+	int i;
+
+	for (i = 0; i < wqe->wr.num_sge; i++) {
+		struct rvt_sge *sge = &wqe->sg_list[i];
+
+		rvt_put_mr(sge->mr);
+	}
+}
+
+/**
+ * rvt_qp_wqe_reserve - reserve operation
+ * @qp - the rvt qp
+ * @wqe - the send wqe
+ *
+ * This routine used in post send to record
+ * a wqe relative reserved operation use.
+ */
+static inline void rvt_qp_wqe_reserve(
+	struct rvt_qp *qp,
+	struct rvt_swqe *wqe)
+{
+	atomic_inc(&qp->s_reserved_used);
+}
+
+/**
+ * rvt_qp_wqe_unreserve - clean reserved operation
+ * @qp - the rvt qp
+ * @wqe - the send wqe
+ *
+ * This decrements the reserve use count.
+ *
+ * This call MUST precede the change to
+ * s_last to insure that post send sees a stable
+ * s_avail.
+ *
+ * An smp_mp__after_atomic() is used to insure
+ * the compiler does not juggle the order of the s_last
+ * ring index and the decrementing of s_reserved_used.
+ */
+static inline void rvt_qp_wqe_unreserve(
+	struct rvt_qp *qp,
+	struct rvt_swqe *wqe)
+{
+	if (unlikely(wqe->wr.send_flags & RVT_SEND_RESERVE_USED)) {
+		atomic_dec(&qp->s_reserved_used);
+		/* insure no compiler re-order up to s_last change */
+		smp_mb__after_atomic();
+	}
+}
+
+extern const enum ib_wc_opcode ib_rvt_wc_opcode[];
+
+/**
+ * rvt_qp_swqe_complete() - insert send completion
+ * @qp - the qp
+ * @wqe - the send wqe
+ * @status - completion status
+ *
+ * Insert a send completion into the completion
+ * queue if the qp indicates it should be done.
+ *
+ * See IBTA 10.7.3.1 for info on completion
+ * control.
+ */
+static inline void rvt_qp_swqe_complete(
+	struct rvt_qp *qp,
+	struct rvt_swqe *wqe,
+	enum ib_wc_opcode opcode,
+	enum ib_wc_status status)
+{
+	if (unlikely(wqe->wr.send_flags & RVT_SEND_RESERVE_USED))
+		return;
+	if (!(qp->s_flags & RVT_S_SIGNAL_REQ_WR) ||
+	    (wqe->wr.send_flags & IB_SEND_SIGNALED) ||
+	     status != IB_WC_SUCCESS) {
+		struct ib_wc wc;
+
+		memset(&wc, 0, sizeof(wc));
+		wc.wr_id = wqe->wr.wr_id;
+		wc.status = status;
+		wc.opcode = opcode;
+		wc.qp = &qp->ibqp;
+		wc.byte_len = wqe->length;
+		rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.send_cq), &wc,
+			     status != IB_WC_SUCCESS);
+	}
+}
+
+/*
+ * Compare the lower 24 bits of the msn values.
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int rvt_cmp_msn(u32 a, u32 b)
+{
+	return (((int)a) - ((int)b)) << 8;
+}
+
+/**
+ * rvt_compute_aeth - compute the AETH (syndrome + MSN)
+ * @qp: the queue pair to compute the AETH for
+ *
+ * Returns the AETH.
+ */
+__be32 rvt_compute_aeth(struct rvt_qp *qp);
+
+/**
+ * rvt_get_credit - flush the send work queue of a QP
+ * @qp: the qp who's send work queue to flush
+ * @aeth: the Acknowledge Extended Transport Header
+ *
+ * The QP s_lock should be held.
+ */
+void rvt_get_credit(struct rvt_qp *qp, u32 aeth);
+
+/**
+ * @qp - the qp pair
+ * @len - the length
+ *
+ * Perform a shift based mtu round up divide
+ */
+static inline u32 rvt_div_round_up_mtu(struct rvt_qp *qp, u32 len)
+{
+	return (len + qp->pmtu - 1) >> qp->log_pmtu;
+}
+
+/**
+ * @qp - the qp pair
+ * @len - the length
+ *
+ * Perform a shift based mtu divide
+ */
+static inline u32 rvt_div_mtu(struct rvt_qp *qp, u32 len)
+{
+	return len >> qp->log_pmtu;
+}
+
+/**
+ * rvt_timeout_to_jiffies - Convert a ULP timeout input into jiffies
+ * @timeout - timeout input(0 - 31).
+ *
+ * Return a timeout value in jiffies.
+ */
+static inline unsigned long rvt_timeout_to_jiffies(u8 timeout)
+{
+	if (timeout > 31)
+		timeout = 31;
+
+	return usecs_to_jiffies(1U << timeout) * 4096UL / 1000UL;
+}
+
+extern const int  ib_rvt_state_ops[];
+
+struct rvt_dev_info;
+int rvt_get_rwqe(struct rvt_qp *qp, bool wr_id_only);
+void rvt_comm_est(struct rvt_qp *qp);
+int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err);
+void rvt_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
+unsigned long rvt_rnr_tbl_to_usec(u32 index);
+enum hrtimer_restart rvt_rc_rnr_retry(struct hrtimer *t);
+void rvt_add_rnr_timer(struct rvt_qp *qp, u32 aeth);
+void rvt_del_timers_sync(struct rvt_qp *qp);
+void rvt_stop_rc_timers(struct rvt_qp *qp);
+void rvt_add_retry_timer(struct rvt_qp *qp);
+
+/**
+ * struct rvt_qp_iter - the iterator for QPs
+ * @qp - the current QP
+ *
+ * This structure defines the current iterator
+ * state for sequenced access to all QPs relative
+ * to an rvt_dev_info.
+ */
+struct rvt_qp_iter {
+	struct rvt_qp *qp;
+	/* private: backpointer */
+	struct rvt_dev_info *rdi;
+	/* private: callback routine */
+	void (*cb)(struct rvt_qp *qp, u64 v);
+	/* private: for arg to callback routine */
+	u64 v;
+	/* private: number of SMI,GSI QPs for device */
+	int specials;
+	/* private: current iterator index */
+	int n;
+};
+
+struct rvt_qp_iter *rvt_qp_iter_init(struct rvt_dev_info *rdi,
+				     u64 v,
+				     void (*cb)(struct rvt_qp *qp, u64 v));
+int rvt_qp_iter_next(struct rvt_qp_iter *iter);
+void rvt_qp_iter(struct rvt_dev_info *rdi,
+		 u64 v,
+		 void (*cb)(struct rvt_qp *qp, u64 v));
+void rvt_qp_mr_clean(struct rvt_qp *qp, u32 lkey);
+#endif          /* DEF_RDMAVT_INCQP_H */