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IB/{hfi1, qib, rdmavt}: Move logic to allocate receive WQE into rdmavt

Browse Source 
Moving receive-side WQE allocation logic into rdmavt will allow
further code reuse between qib and hfi1 drivers.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Brian Welty 2018-05-02 06:44:03 -07:00 committed by Doug Ledford
parent 5d18ee67d4
commit 832369fa64
12 changed files with 170 additions and 324 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/infiniband/hw/hfi1/rc.c
View File

@ -2123,7 +2123,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
/* OK, process the packet. */
switch (opcode) {
case OP(SEND_FIRST):
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -2149,7 +2149,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE):
/* consume RWQE */
ret = hfi1_rvt_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -2159,7 +2159,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
case OP(SEND_ONLY):
case OP(SEND_ONLY_WITH_IMMEDIATE):
case OP(SEND_ONLY_WITH_INVALIDATE):
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -2271,7 +2271,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
goto send_middle;
else if (opcode == OP(RDMA_WRITE_ONLY))
goto no_immediate_data;
ret = hfi1_rvt_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto nack_op_err;
if (!ret) {

154
drivers/infiniband/hw/hfi1/ruc.c
View File

@ -53,156 +53,6 @@
#include "verbs_txreq.h"
#include "trace.h"
/*
* Validate a RWQE and fill in the SGE state.
* Return 1 if OK.
*/
static int init_sge(struct rvt_qp *qp, struct rvt_rwqe *wqe)
{
int i, j, ret;
struct ib_wc wc;
struct rvt_lkey_table *rkt;
struct rvt_pd *pd;
struct rvt_sge_state *ss;
rkt = &to_idev(qp->ibqp.device)->rdi.lkey_table;
pd = ibpd_to_rvtpd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd);
ss = &qp->r_sge;
ss->sg_list = qp->r_sg_list;
qp->r_len = 0;
for (i = j = 0; i < wqe->num_sge; i++) {
if (wqe->sg_list[i].length == 0)
continue;
/* Check LKEY */
ret = rvt_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge,
NULL, &wqe->sg_list[i],
IB_ACCESS_LOCAL_WRITE);
if (unlikely(ret <= 0))
goto bad_lkey;
qp->r_len += wqe->sg_list[i].length;
j++;
}
ss->num_sge = j;
ss->total_len = qp->r_len;
ret = 1;
goto bail;
bad_lkey:
while (j) {
struct rvt_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge;
rvt_put_mr(sge->mr);
}
ss->num_sge = 0;
memset(&wc, 0, sizeof(wc));
wc.wr_id = wqe->wr_id;
wc.status = IB_WC_LOC_PROT_ERR;
wc.opcode = IB_WC_RECV;
wc.qp = &qp->ibqp;
/* Signal solicited completion event. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1);
ret = 0;
bail:
return ret;
}
/**
* hfi1_rvt_get_rwqe - copy the next RWQE into the QP's RWQE
* @qp: the QP
* @wr_id_only: update qp->r_wr_id only, not qp->r_sge
*
* Return -1 if there is a local error, 0 if no RWQE is available,
* otherwise return 1.
*
* Can be called from interrupt level.
*/
int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only)
{
unsigned long flags;
struct rvt_rq *rq;
struct rvt_rwq *wq;
struct rvt_srq *srq;
struct rvt_rwqe *wqe;
void (*handler)(struct ib_event *, void *);
u32 tail;
int ret;
if (qp->ibqp.srq) {
srq = ibsrq_to_rvtsrq(qp->ibqp.srq);
handler = srq->ibsrq.event_handler;
rq = &srq->rq;
} else {
srq = NULL;
handler = NULL;
rq = &qp->r_rq;
}
spin_lock_irqsave(&rq->lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) {
ret = 0;
goto unlock;
}
wq = rq->wq;
tail = wq->tail;
/* Validate tail before using it since it is user writable. */
if (tail >= rq->size)
tail = 0;
if (unlikely(tail == wq->head)) {
ret = 0;
goto unlock;
}
/* Make sure entry is read after head index is read. */
smp_rmb();
wqe = rvt_get_rwqe_ptr(rq, tail);
/*
* Even though we update the tail index in memory, the verbs
* consumer is not supposed to post more entries until a
* completion is generated.
*/
if (++tail >= rq->size)
tail = 0;
wq->tail = tail;
if (!wr_id_only && !init_sge(qp, wqe)) {
ret = -1;
goto unlock;
}
qp->r_wr_id = wqe->wr_id;
ret = 1;
set_bit(RVT_R_WRID_VALID, &qp->r_aflags);
if (handler) {
u32 n;
/*
* Validate head pointer value and compute
* the number of remaining WQEs.
*/
n = wq->head;
if (n >= rq->size)
n = 0;
if (n < tail)
n += rq->size - tail;
else
n -= tail;
if (n < srq->limit) {
struct ib_event ev;
srq->limit = 0;
spin_unlock_irqrestore(&rq->lock, flags);
ev.device = qp->ibqp.device;
ev.element.srq = qp->ibqp.srq;
ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
handler(&ev, srq->ibsrq.srq_context);
goto bail;
}
}
unlock:
spin_unlock_irqrestore(&rq->lock, flags);
bail:
return ret;
}
static int gid_ok(union ib_gid *gid, __be64 gid_prefix, __be64 id)
{
return (gid->global.interface_id == id &&
@ -423,7 +273,7 @@ static void ruc_loopback(struct rvt_qp *sqp)
/* FALLTHROUGH */
case IB_WR_SEND:
send:
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto op_err;
if (!ret)
@ -435,7 +285,7 @@ static void ruc_loopback(struct rvt_qp *sqp)
goto inv_err;
wc.wc_flags = IB_WC_WITH_IMM;
wc.ex.imm_data = wqe->wr.ex.imm_data;
ret = hfi1_rvt_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto op_err;
if (!ret)

4
drivers/infiniband/hw/hfi1/uc.c
View File

@ -397,7 +397,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) {
qp->r_sge = qp->s_rdma_read_sge;
} else {
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto op_err;
if (!ret)
@ -542,7 +542,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) {
rvt_put_ss(&qp->s_rdma_read_sge);
} else {
ret = hfi1_rvt_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto op_err;
if (!ret)

4
drivers/infiniband/hw/hfi1/ud.c
View File

@ -163,7 +163,7 @@ static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe)
} else {
int ret;
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0) {
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
goto bail_unlock;
@ -974,7 +974,7 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
} else {
int ret;
ret = hfi1_rvt_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0) {
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
return;

2
drivers/infiniband/hw/hfi1/verbs.h
View File

@ -328,8 +328,6 @@ void hfi1_ud_rcv(struct hfi1_packet *packet);
int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
void hfi1_migrate_qp(struct rvt_qp *qp);
int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,

8
drivers/infiniband/hw/qib/qib_rc.c
View File

@ -1828,7 +1828,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
/* OK, process the packet. */
switch (opcode) {
case OP(SEND_FIRST):
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -1849,7 +1849,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE):
/* consume RWQE */
ret = qib_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -1858,7 +1858,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
case OP(SEND_ONLY):
case OP(SEND_ONLY_WITH_IMMEDIATE):
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto nack_op_err;
if (!ret)
@ -1949,7 +1949,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
goto send_middle;
else if (opcode == OP(RDMA_WRITE_ONLY))
goto no_immediate_data;
ret = qib_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto nack_op_err;
if (!ret) {

154
drivers/infiniband/hw/qib/qib_ruc.c
View File

@ -37,156 +37,6 @@
#include "qib.h"
#include "qib_mad.h"
/*
* Validate a RWQE and fill in the SGE state.
* Return 1 if OK.
*/
static int qib_init_sge(struct rvt_qp *qp, struct rvt_rwqe *wqe)
{
int i, j, ret;
struct ib_wc wc;
struct rvt_lkey_table *rkt;
struct rvt_pd *pd;
struct rvt_sge_state *ss;
rkt = &to_idev(qp->ibqp.device)->rdi.lkey_table;
pd = ibpd_to_rvtpd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd);
ss = &qp->r_sge;
ss->sg_list = qp->r_sg_list;
qp->r_len = 0;
for (i = j = 0; i < wqe->num_sge; i++) {
if (wqe->sg_list[i].length == 0)
continue;
/* Check LKEY */
ret = rvt_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge,
NULL, &wqe->sg_list[i],
IB_ACCESS_LOCAL_WRITE);
if (unlikely(ret <= 0))
goto bad_lkey;
qp->r_len += wqe->sg_list[i].length;
j++;
}
ss->num_sge = j;
ss->total_len = qp->r_len;
ret = 1;
goto bail;
bad_lkey:
while (j) {
struct rvt_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge;
rvt_put_mr(sge->mr);
}
ss->num_sge = 0;
memset(&wc, 0, sizeof(wc));
wc.wr_id = wqe->wr_id;
wc.status = IB_WC_LOC_PROT_ERR;
wc.opcode = IB_WC_RECV;
wc.qp = &qp->ibqp;
/* Signal solicited completion event. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1);
ret = 0;
bail:
return ret;
}
/**
* qib_get_rwqe - copy the next RWQE into the QP's RWQE
* @qp: the QP
* @wr_id_only: update qp->r_wr_id only, not qp->r_sge
*
* Return -1 if there is a local error, 0 if no RWQE is available,
* otherwise return 1.
*
* Can be called from interrupt level.
*/
int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only)
{
unsigned long flags;
struct rvt_rq *rq;
struct rvt_rwq *wq;
struct rvt_srq *srq;
struct rvt_rwqe *wqe;
void (*handler)(struct ib_event *, void *);
u32 tail;
int ret;
if (qp->ibqp.srq) {
srq = ibsrq_to_rvtsrq(qp->ibqp.srq);
handler = srq->ibsrq.event_handler;
rq = &srq->rq;
} else {
srq = NULL;
handler = NULL;
rq = &qp->r_rq;
}
spin_lock_irqsave(&rq->lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) {
ret = 0;
goto unlock;
}
wq = rq->wq;
tail = wq->tail;
/* Validate tail before using it since it is user writable. */
if (tail >= rq->size)
tail = 0;
if (unlikely(tail == wq->head)) {
ret = 0;
goto unlock;
}
/* Make sure entry is read after head index is read. */
smp_rmb();
wqe = rvt_get_rwqe_ptr(rq, tail);
/*
* Even though we update the tail index in memory, the verbs
* consumer is not supposed to post more entries until a
* completion is generated.
*/
if (++tail >= rq->size)
tail = 0;
wq->tail = tail;
if (!wr_id_only && !qib_init_sge(qp, wqe)) {
ret = -1;
goto unlock;
}
qp->r_wr_id = wqe->wr_id;
ret = 1;
set_bit(RVT_R_WRID_VALID, &qp->r_aflags);
if (handler) {
u32 n;
/*
* Validate head pointer value and compute
* the number of remaining WQEs.
*/
n = wq->head;
if (n >= rq->size)
n = 0;
if (n < tail)
n += rq->size - tail;
else
n -= tail;
if (n < srq->limit) {
struct ib_event ev;
srq->limit = 0;
spin_unlock_irqrestore(&rq->lock, flags);
ev.device = qp->ibqp.device;
ev.element.srq = qp->ibqp.srq;
ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
handler(&ev, srq->ibsrq.srq_context);
goto bail;
}
}
unlock:
spin_unlock_irqrestore(&rq->lock, flags);
bail:
return ret;
}
/*
* Switch to alternate path.
* The QP s_lock should be held and interrupts disabled.
@ -419,7 +269,7 @@ static void qib_ruc_loopback(struct rvt_qp *sqp)
wc.ex.imm_data = wqe->wr.ex.imm_data;
/* FALLTHROUGH */
case IB_WR_SEND:
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto op_err;
if (!ret)
@ -431,7 +281,7 @@ static void qib_ruc_loopback(struct rvt_qp *sqp)
goto inv_err;
wc.wc_flags = IB_WC_WITH_IMM;
wc.ex.imm_data = wqe->wr.ex.imm_data;
ret = qib_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto op_err;
if (!ret)

4
drivers/infiniband/hw/qib/qib_uc.c
View File

@ -335,7 +335,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags))
qp->r_sge = qp->s_rdma_read_sge;
else {
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0)
goto op_err;
if (!ret)
@ -471,7 +471,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags))
rvt_put_ss(&qp->s_rdma_read_sge);
else {
ret = qib_get_rwqe(qp, 1);
ret = rvt_get_rwqe(qp, true);
if (ret < 0)
goto op_err;
if (!ret)

4
drivers/infiniband/hw/qib/qib_ud.c
View File

@ -139,7 +139,7 @@ static void qib_ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe)
else {
int ret;
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0) {
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
goto bail_unlock;
@ -534,7 +534,7 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
else {
int ret;
ret = qib_get_rwqe(qp, 0);
ret = rvt_get_rwqe(qp, false);
if (ret < 0) {
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
return;

2
drivers/infiniband/hw/qib/qib_verbs.h
View File

@ -321,8 +321,6 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
void mr_rcu_callback(struct rcu_head *list);
int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only);
void qib_migrate_qp(struct rvt_qp *qp);
int qib_ruc_check_hdr(struct qib_ibport *ibp, struct ib_header *hdr,

149
drivers/infiniband/sw/rdmavt/qp.c
View File

@ -1987,6 +1987,155 @@ int rvt_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
return 0;
}
/*
* Validate a RWQE and fill in the SGE state.
* Return 1 if OK.
*/
static int init_sge(struct rvt_qp *qp, struct rvt_rwqe *wqe)
{
int i, j, ret;
struct ib_wc wc;
struct rvt_lkey_table *rkt;
struct rvt_pd *pd;
struct rvt_sge_state *ss;
struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device);
rkt = &rdi->lkey_table;
pd = ibpd_to_rvtpd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd);
ss = &qp->r_sge;
ss->sg_list = qp->r_sg_list;
qp->r_len = 0;
for (i = j = 0; i < wqe->num_sge; i++) {
if (wqe->sg_list[i].length == 0)
continue;
/* Check LKEY */
ret = rvt_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge,
NULL, &wqe->sg_list[i],
IB_ACCESS_LOCAL_WRITE);
if (unlikely(ret <= 0))
goto bad_lkey;
qp->r_len += wqe->sg_list[i].length;
j++;
}
ss->num_sge = j;
ss->total_len = qp->r_len;
return 1;
bad_lkey:
while (j) {
struct rvt_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge;
rvt_put_mr(sge->mr);
}
ss->num_sge = 0;
memset(&wc, 0, sizeof(wc));
wc.wr_id = wqe->wr_id;
wc.status = IB_WC_LOC_PROT_ERR;
wc.opcode = IB_WC_RECV;
wc.qp = &qp->ibqp;
/* Signal solicited completion event. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 1);
return 0;
}
/**
* rvt_get_rwqe - copy the next RWQE into the QP's RWQE
* @qp: the QP
* @wr_id_only: update qp->r_wr_id only, not qp->r_sge
*
* Return -1 if there is a local error, 0 if no RWQE is available,
* otherwise return 1.
*
* Can be called from interrupt level.
*/
int rvt_get_rwqe(struct rvt_qp *qp, bool wr_id_only)
{
unsigned long flags;
struct rvt_rq *rq;
struct rvt_rwq *wq;
struct rvt_srq *srq;
struct rvt_rwqe *wqe;
void (*handler)(struct ib_event *, void *);
u32 tail;
int ret;
if (qp->ibqp.srq) {
srq = ibsrq_to_rvtsrq(qp->ibqp.srq);
handler = srq->ibsrq.event_handler;
rq = &srq->rq;
} else {
srq = NULL;
handler = NULL;
rq = &qp->r_rq;
}
spin_lock_irqsave(&rq->lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) {
ret = 0;
goto unlock;
}
wq = rq->wq;
tail = wq->tail;
/* Validate tail before using it since it is user writable. */
if (tail >= rq->size)
tail = 0;
if (unlikely(tail == wq->head)) {
ret = 0;
goto unlock;
}
/* Make sure entry is read after head index is read. */
smp_rmb();
wqe = rvt_get_rwqe_ptr(rq, tail);
/*
* Even though we update the tail index in memory, the verbs
* consumer is not supposed to post more entries until a
* completion is generated.
*/
if (++tail >= rq->size)
tail = 0;
wq->tail = tail;
if (!wr_id_only && !init_sge(qp, wqe)) {
ret = -1;
goto unlock;
}
qp->r_wr_id = wqe->wr_id;
ret = 1;
set_bit(RVT_R_WRID_VALID, &qp->r_aflags);
if (handler) {
u32 n;
/*
* Validate head pointer value and compute
* the number of remaining WQEs.
*/
n = wq->head;
if (n >= rq->size)
n = 0;
if (n < tail)
n += rq->size - tail;
else
n -= tail;
if (n < srq->limit) {
struct ib_event ev;
srq->limit = 0;
spin_unlock_irqrestore(&rq->lock, flags);
ev.device = qp->ibqp.device;
ev.element.srq = qp->ibqp.srq;
ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
handler(&ev, srq->ibsrq.srq_context);
goto bail;
}
}
unlock:
spin_unlock_irqrestore(&rq->lock, flags);
bail:
return ret;
}
EXPORT_SYMBOL(rvt_get_rwqe);
/**
* qp_comm_est - handle trap with QP established
* @qp: the QP

1
include/rdma/rdmavt_qp.h
View File

@ -663,6 +663,7 @@ static inline unsigned long rvt_timeout_to_jiffies(u8 timeout)
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);