Until all functionality is moved over to rdmavt drivers still need to
access a number of fields in data structures that are predominantly
meant to be used by rdmavt. Once these rdmavt_<ibta_object>.h header
files are no longer being touched by drivers their content should be
moved to rdmavt/<ibta_object>.h. While here move a couple #defines
over to more general IB verbs header files because they fit better.
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
---
drivers/infiniband/sw/rdmavt/ah.c | 4
include/rdma/ib_verbs.h | 1
include/rdma/rdma_vt.h | 309 -------------------------------------
include/rdma/rdmavt_mr.h | 133 ++++++++++++++++
include/rdma/rdmavt_qp.h | 265 ++++++++++++++++++++++++++++++++
5 files changed, 404 insertions(+), 308 deletions(-)
create mode 100644 include/rdma/rdmavt_mr.h
create mode 100644 include/rdma/rdmavt_qp.h
diff --git a/drivers/infiniband/sw/rdmavt/ah.c b/drivers/infiniband/sw/rdmavt/ah.c
index 982c2ae..70376c2 100644
--- a/drivers/infiniband/sw/rdmavt/ah.c
+++ b/drivers/infiniband/sw/rdmavt/ah.c
@@ -81,8 +81,8 @@ int rvt_check_ah(struct ib_device *ibdev,
if (link != IB_LINK_LAYER_ETHERNET) {
if (ah_attr->dlid == 0)
return -EINVAL;
- if (ah_attr->dlid >= RVT_MULTICAST_LID_BASE &&
- ah_attr->dlid != RVT_PERMISSIVE_LID &&
+ if (ah_attr->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) &&
+ ah_attr->dlid != be16_to_cpu(IB_LID_PERMISSIVE) &&
!(ah_attr->ah_flags & IB_AH_GRH))
return -EINVAL;
}
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 9a68a19..c8c7be0 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -524,6 +524,7 @@ enum {
};
#define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF)
+#define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000)
enum ib_ah_flags {
IB_AH_GRH = 1
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h
index f75e7c7..ac5222c 100644
--- a/include/rdma/rdma_vt.h
+++ b/include/rdma/rdma_vt.h
@@ -58,10 +58,9 @@
#include <linux/spinlock.h>
#include <linux/list.h>
-#include "ib_verbs.h"
-
-#define RVT_MULTICAST_LID_BASE 0xC000
-#define RVT_PERMISSIVE_LID 0xFFFF
+#include <rdma/ib_verbs.h>
+#include <rdma/rdmavt_mr.h>
+#include <rdma/rdmavt_qp.h>
/*
* For some of the IBTA objects there will likely be some
@@ -73,297 +72,6 @@
#define RVT_FLAG_QP_INIT_DRIVER BIT(2)
#define RVT_FLAG_CQ_INIT_DRIVER BIT(3)
-/*
- * For Memory Regions. This stuff should probably be moved into rdmavt/mr.h once
- * drivers no longer need access to the MR directly.
- */
-
-/*
- * A segment is a linear region of low physical memory.
- * Used by the verbs layer.
- */
-struct rvt_seg {
- void *vaddr;
- size_t length;
-};
-
-/* The number of rvt_segs that fit in a page. */
-#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg))
-
-struct rvt_segarray {
- struct rvt_seg segs[RVT_SEGSZ];
-};
-
-struct rvt_mregion {
- struct ib_pd *pd; /* shares refcnt of ibmr.pd */
- u64 user_base; /* User's address for this region */
- u64 iova; /* IB start address of this region */
- size_t length;
- u32 lkey;
- u32 offset; /* offset (bytes) to start of region */
- int access_flags;
- u32 max_segs; /* number of rvt_segs in all the arrays */
- u32 mapsz; /* size of the map array */
- u8 page_shift; /* 0 - non unform/non powerof2 sizes */
- u8 lkey_published; /* in global table */
- struct completion comp; /* complete when refcount goes to zero */
- atomic_t refcount;
- struct rvt_segarray *map[0]; /* the segments */
-};
-
-#define RVT_MAX_LKEY_TABLE_BITS 23
-
-struct rvt_lkey_table {
- spinlock_t lock; /* protect changes in this struct */
- u32 next; /* next unused index (speeds search) */
- u32 gen; /* generation count */
- u32 max; /* size of the table */
- struct rvt_mregion __rcu **table;
-};
-
-/* End Memmory Region */
-
-/*
- * Things needed for the Queue Pair definition. Like the MR stuff above the
- * following should probably get moved to qp.h once drivers stop trying to make
- * and manipulate thier own QPs. For the few instnaces where a driver may need
- * to look into a queue pair there should be a pointer to a driver priavte data
- * structure that they can look at.
- */
-
-/*
- * These keep track of the copy progress within a memory region.
- * Used by the verbs layer.
- */
-struct rvt_sge {
- struct rvt_mregion *mr;
- void *vaddr; /* kernel virtual address of segment */
- u32 sge_length; /* length of the SGE */
- u32 length; /* remaining length of the segment */
- u16 m; /* current index: mr->map[m] */
- u16 n; /* current index: mr->map[m]->segs[n] */
-};
-
-/*
- * 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;
-};
-
-#define RVT_MAX_RDMA_ATOMIC 16
-
-/*
- * This structure holds the information that the send tasklet needs
- * to send a RDMA read response or atomic operation.
- */
-struct rvt_ack_entry {
- u8 opcode;
- u8 sent;
- u32 psn;
- u32 lpsn;
- union {
- struct rvt_sge rdma_sge;
- u64 atomic_data;
- };
-};
-
-struct rvt_sge_state {
- struct rvt_sge *sg_list; /* next SGE to be used if any */
- struct rvt_sge sge; /* progress state for the current SGE */
- u32 total_len;
- u8 num_sge;
-};
-
-/*
- * Variables prefixed with s_ are for the requester (sender).
- * Variables prefixed with r_ are for the responder (receiver).
- * Variables prefixed with ack_ are for responder replies.
- *
- * 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 ib_ah_attr remote_ah_attr;
- struct ib_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 */
-
- enum ib_mtu path_mtu;
- int srate_mbps; /* s_srate (below) converted to Mbit/s */
- u32 remote_qpn;
- u32 pmtu; /* decoded from path_mtu */
- u32 qkey; /* QKEY for this QP (for UD or RD) */
- u32 s_size; /* send work queue size */
- u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
- u32 s_ahgpsn; /* set to the psn in the copy of the header */
-
- 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[RVT_MAX_RDMA_ATOMIC + 1]
- ____cacheline_aligned_in_smp;
- struct rvt_sge_state s_rdma_read_sge;
-
- spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
- 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_psn; /* expected rcv packet sequence number */
- 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[] */
-
- 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 */
-
- spinlock_t s_lock ____cacheline_aligned_in_smp;
- struct rvt_sge_state *s_cur_sge;
- u32 s_flags;
- struct rvt_swqe *s_wqe;
- struct rvt_sge_state s_sge; /* current send request data */
- struct rvt_mregion *s_rdma_mr;
- struct sdma_engine *s_sde; /* current sde */
- u32 s_cur_size; /* size of send packet in bytes */
- u32 s_len; /* total length of s_sge */
- u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
- u32 s_next_psn; /* PSN for next request */
- 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_head; /* new entries added here */
- 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_ssn; /* SSN of tail entry */
- u32 s_lsn; /* limit sequence number (credit) */
- u16 s_hdrwords; /* size of s_hdr in 32 bit words */
- u16 s_rdma_ack_cnt;
- 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;
-
- /*
- * 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;
-};
-
-/* End QP section */
-
struct rvt_ibport {
struct rvt_qp __rcu *qp[2];
struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
@@ -560,17 +268,6 @@ static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
return container_of(ibdev, struct rvt_dev_info, ibdev);
}
-static inline void rvt_put_mr(struct rvt_mregion *mr)
-{
- if (unlikely(atomic_dec_and_test(&mr->refcount)))
- complete(&mr->comp);
-}
-
-static inline void rvt_get_mr(struct rvt_mregion *mr)
-{
- atomic_inc(&mr->refcount);
-}
-
static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
{
return container_of(ibsrq, struct rvt_srq, ibsrq);
diff --git a/include/rdma/rdmavt_mr.h b/include/rdma/rdmavt_mr.h
new file mode 100644
index 0000000..22d0324
--- /dev/null
+++ b/include/rdma/rdmavt_mr.h
@@ -0,0 +1,133 @@
+#ifndef DEF_RDMAVT_INCMR_H
+#define DEF_RDMAVT_INCMR_H
+
+/*
+ *
+ * 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
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * For Memory Regions. This stuff should probably be moved into rdmavt/mr.h once
+ * drivers no longer need access to the MR directly.
+ */
+
+/*
+ * A segment is a linear region of low physical memory.
+ * Used by the verbs layer.
+ */
+struct rvt_seg {
+ void *vaddr;
+ size_t length;
+};
+
+/* The number of rvt_segs that fit in a page. */
+#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg))
+
+struct rvt_segarray {
+ struct rvt_seg segs[RVT_SEGSZ];
+};
+
+struct rvt_mregion {
+ struct ib_pd *pd; /* shares refcnt of ibmr.pd */
+ u64 user_base; /* User's address for this region */
+ u64 iova; /* IB start address of this region */
+ size_t length;
+ u32 lkey;
+ u32 offset; /* offset (bytes) to start of region */
+ int access_flags;
+ u32 max_segs; /* number of rvt_segs in all the arrays */
+ u32 mapsz; /* size of the map array */
+ u8 page_shift; /* 0 - non unform/non powerof2 sizes */
+ u8 lkey_published; /* in global table */
+ struct completion comp; /* complete when refcount goes to zero */
+ atomic_t refcount;
+ struct rvt_segarray *map[0]; /* the segments */
+};
+
+#define RVT_MAX_LKEY_TABLE_BITS 23
+
+struct rvt_lkey_table {
+ spinlock_t lock; /* protect changes in this struct */
+ u32 next; /* next unused index (speeds search) */
+ u32 gen; /* generation count */
+ u32 max; /* size of the table */
+ struct rvt_mregion __rcu **table;
+};
+
+/*
+ * These keep track of the copy progress within a memory region.
+ * Used by the verbs layer.
+ */
+struct rvt_sge {
+ struct rvt_mregion *mr;
+ void *vaddr; /* kernel virtual address of segment */
+ u32 sge_length; /* length of the SGE */
+ u32 length; /* remaining length of the segment */
+ u16 m; /* current index: mr->map[m] */
+ u16 n; /* current index: mr->map[m]->segs[n] */
+};
+
+struct rvt_sge_state {
+ struct rvt_sge *sg_list; /* next SGE to be used if any */
+ struct rvt_sge sge; /* progress state for the current SGE */
+ u32 total_len;
+ u8 num_sge;
+};
+
+static inline void rvt_put_mr(struct rvt_mregion *mr)
+{
+ if (unlikely(atomic_dec_and_test(&mr->refcount)))
+ complete(&mr->comp);
+}
+
+static inline void rvt_get_mr(struct rvt_mregion *mr)
+{
+ atomic_inc(&mr->refcount);
+}
+
+#endif /* DEF_RDMAVT_INCMRH */
diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
new file mode 100644
index 0000000..9d4444f
--- /dev/null
+++ b/include/rdma/rdmavt_qp.h
@@ -0,0 +1,265 @@
+#ifndef DEF_RDMAVT_INCQP_H
+#define DEF_RDMAVT_INCQP_H
+
+/*
+ *
+ * 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
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * 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;
+};
+
+#define RVT_MAX_RDMA_ATOMIC 16
+
+/*
+ * This structure holds the information that the send tasklet needs
+ * to send a RDMA read response or atomic operation.
+ */
+struct rvt_ack_entry {
+ u8 opcode;
+ u8 sent;
+ u32 psn;
+ u32 lpsn;
+ union {
+ struct rvt_sge rdma_sge;
+ u64 atomic_data;
+ };
+};
+
+/*
+ * Variables prefixed with s_ are for the requester (sender).
+ * Variables prefixed with r_ are for the responder (receiver).
+ * Variables prefixed with ack_ are for responder replies.
+ *
+ * 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 ib_ah_attr remote_ah_attr;
+ struct ib_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 */
+
+ enum ib_mtu path_mtu;
+ int srate_mbps; /* s_srate (below) converted to Mbit/s */
+ u32 remote_qpn;
+ u32 pmtu; /* decoded from path_mtu */
+ u32 qkey; /* QKEY for this QP (for UD or RD) */
+ u32 s_size; /* send work queue size */
+ u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
+ u32 s_ahgpsn; /* set to the psn in the copy of the header */
+
+ 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[RVT_MAX_RDMA_ATOMIC + 1]
+ ____cacheline_aligned_in_smp;
+ struct rvt_sge_state s_rdma_read_sge;
+
+ spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
+ 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_psn; /* expected rcv packet sequence number */
+ 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[] */
+
+ 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 */
+
+ spinlock_t s_lock ____cacheline_aligned_in_smp;
+ struct rvt_sge_state *s_cur_sge;
+ u32 s_flags;
+ struct rvt_swqe *s_wqe;
+ struct rvt_sge_state s_sge; /* current send request data */
+ struct rvt_mregion *s_rdma_mr;
+ struct sdma_engine *s_sde; /* current sde */
+ u32 s_cur_size; /* size of send packet in bytes */
+ u32 s_len; /* total length of s_sge */
+ u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
+ u32 s_next_psn; /* PSN for next request */
+ 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_head; /* new entries added here */
+ 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_ssn; /* SSN of tail entry */
+ u32 s_lsn; /* limit sequence number (credit) */
+ u16 s_hdrwords; /* size of s_hdr in 32 bit words */
+ u16 s_rdma_ack_cnt;
+ 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;
+
+ /*
+ * 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;
+};
+
+#endif /* DEF_RDMAVT_INCQP_H */
--
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