[for-next,v2,08/13] RDMA/rxe: Extend rxe_qp.c to support xrc qps

Message ID	20220929170836.17838-9-rpearsonhpe@gmail.com (mailing list archive)
State	Changes Requested
Delegated to:	Jason Gunthorpe
Headers	show Return-Path: <linux-rdma-owner@kernel.org> From: Bob Pearson <rpearsonhpe@gmail.com> To: jgg@nvidia.com, zyjzyj2000@gmail.com, linux-rdma@vger.kernel.org Cc: Bob Pearson <rpearsonhpe@gmail.com> Subject: [PATCH for-next v2 08/13] RDMA/rxe: Extend rxe_qp.c to support xrc qps Date: Thu, 29 Sep 2022 12:08:32 -0500 Message-Id: <20220929170836.17838-9-rpearsonhpe@gmail.com> In-Reply-To: <20220929170836.17838-1-rpearsonhpe@gmail.com> References: <20220929170836.17838-1-rpearsonhpe@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Implement the xrc transport \| expand [for-next,v2,00/13] Implement the xrc transport [for-next,v2,01/13] RDMA/rxe: Replace START->FIRST, END->LAST [for-next,v2,02/13] RDMA/rxe: Move next_opcode() to rxe_opcode.c [for-next,v2,03/13] RDMA: Add xrc opcodes to ib_pack.h [for-next,v2,04/13] RDMA/rxe: Extend opcodes and headers to support xrc [for-next,v2,05/13] RDMA/rxe: Add xrc opcodes to next_opcode() [for-next,v2,06/13] RDMA/rxe: Implement open_xrcd and close_xrcd [for-next,v2,07/13] RDMA/rxe: Extend srq verbs to support xrcd [for-next,v2,08/13] RDMA/rxe: Extend rxe_qp.c to support xrc qps [for-next,v2,09/13] RDMA/rxe: Extend rxe_recv.c to support xrc [for-next,v2,10/13] RDMA/rxe: Extend rxe_comp.c to support xrc qps [for-next,v2,11/13] RDMA/rxe: Extend rxe_req.c to support xrc qps [for-next,v2,12/13] RDMA/rxe: Extend rxe_net.c to support xrc qps [for-next,v2,13/13] RDMA/rxe: Extend rxe_resp.c to support xrc qps

diff --git a/drivers/infiniband/sw/rxe/rxe_av.c b/drivers/infiniband/sw/rxe/rxe_av.c index 3b05314ca739..c8f3ec53aa79 100644 --- a/drivers/infiniband/sw/rxe/rxe_av.c +++ b/drivers/infiniband/sw/rxe/rxe_av.c @@ -110,7 +110,8 @@ struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt, struct rxe_ah **ahp) if (!pkt || !pkt->qp) return NULL; - if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC) + if (qp_type(pkt->qp) == IB_QPT_RC || qp_type(pkt->qp) == IB_QPT_UC || + qp_type(pkt->qp) == IB_QPT_XRC_INI) return &pkt->qp->pri_av; if (!pkt->wqe) diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h index a806737168d0..1eba6384b6a4 100644 --- a/drivers/infiniband/sw/rxe/rxe_loc.h +++ b/drivers/infiniband/sw/rxe/rxe_loc.h @@ -103,11 +103,12 @@ const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num); int next_opcode(struct rxe_qp *qp, struct rxe_send_wqe *wqe, u32 opcode); /* rxe_qp.c */ -int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init); -int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, +int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp *ibqp, + struct ib_qp_init_attr *init); +int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_init_attr *init, struct rxe_create_qp_resp __user *uresp, - struct ib_pd *ibpd, struct ib_udata *udata); + struct ib_udata *udata); int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init); int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_attr *attr, int mask); diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c index a62bab88415c..5782f8aa2213 100644 --- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -56,34 +56,45 @@ static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap, return -EINVAL; } -int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init) +int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp *ibqp, + struct ib_qp_init_attr *init) { + struct ib_pd *ibpd = ibqp->pd; struct ib_qp_cap *cap = &init->cap; struct rxe_port *port; int port_num = init->port_num; + if (init->create_flags) + return -EOPNOTSUPP; + switch (init->qp_type) { case IB_QPT_GSI: case IB_QPT_RC: case IB_QPT_UC: case IB_QPT_UD: + if (!ibpd || !init->recv_cq || !init->send_cq) + return -EINVAL; + break; + case IB_QPT_XRC_INI: + if (!init->send_cq) + return -EINVAL; + break; + case IB_QPT_XRC_TGT: + if (!init->xrcd) + return -EINVAL; break; default: return -EOPNOTSUPP; } - if (!init->recv_cq || !init->send_cq) { - pr_debug("missing cq\n"); - goto err1; + if (init->qp_type != IB_QPT_XRC_TGT) { + if (rxe_qp_chk_cap(rxe, cap, !!(init->srq || init->xrcd))) + goto err1; } - if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) - goto err1; - if (init->qp_type == IB_QPT_GSI) { if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) { pr_debug("invalid port = %d\n", port_num); - goto err1; } port = &rxe->port; @@ -148,49 +159,83 @@ static void cleanup_rd_atomic_resources(struct rxe_qp *qp) static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_init_attr *init) { - struct rxe_port *port; - u32 qpn; - + qp->ibqp.qp_type = init->qp_type; qp->sq_sig_type = init->sq_sig_type; qp->attr.path_mtu = 1; qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); - qpn = qp->elem.index; - port = &rxe->port; - switch (init->qp_type) { case IB_QPT_GSI: qp->ibqp.qp_num = 1; - port->qp_gsi_index = qpn; + rxe->port.qp_gsi_index = qp->elem.index; qp->attr.port_num = init->port_num; break; default: - qp->ibqp.qp_num = qpn; + qp->ibqp.qp_num = qp->elem.index; break; } spin_lock_init(&qp->state_lock); - spin_lock_init(&qp->req.task.state_lock); - spin_lock_init(&qp->resp.task.state_lock); - spin_lock_init(&qp->comp.task.state_lock); - - spin_lock_init(&qp->sq.sq_lock); - spin_lock_init(&qp->rq.producer_lock); - spin_lock_init(&qp->rq.consumer_lock); - atomic_set(&qp->ssn, 0); atomic_set(&qp->skb_out, 0); } +static int rxe_prepare_send_queue(struct rxe_dev *rxe, struct rxe_qp *qp, + struct ib_qp_init_attr *init, struct ib_udata *udata, + struct rxe_create_qp_resp __user *uresp) +{ + struct rxe_queue *q; + int wqe_size; + int err; + + qp->sq.max_wr = init->cap.max_send_wr; + + wqe_size = init->cap.max_send_sge*sizeof(struct ib_sge); + wqe_size = max_t(int, wqe_size, init->cap.max_inline_data); + + qp->sq.max_sge = wqe_size/sizeof(struct ib_sge); + qp->sq.max_inline = wqe_size; + wqe_size += sizeof(struct rxe_send_wqe); + + q = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size, + QUEUE_TYPE_FROM_CLIENT); + if (!q) + return -ENOMEM; + + err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, + q->buf, q->buf_size, &q->ip); + + if (err) { + vfree(q->buf); + kfree(q); + return err; + } + + init->cap.max_send_sge = qp->sq.max_sge; + init->cap.max_inline_data = qp->sq.max_inline; + + qp->sq.queue = q; + + return 0; +} + static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_init_attr *init, struct ib_udata *udata, struct rxe_create_qp_resp __user *uresp) { int err; - int wqe_size; - enum queue_type type; + + err = rxe_prepare_send_queue(rxe, qp, init, udata, uresp); + if (err) + return err; + + spin_lock_init(&qp->sq.sq_lock); + spin_lock_init(&qp->req.task.state_lock); + spin_lock_init(&qp->comp.task.state_lock); + + skb_queue_head_init(&qp->resp_pkts); err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); if (err < 0) @@ -205,32 +250,6 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, * (0xc000 - 0xffff). */ qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); - qp->sq.max_wr = init->cap.max_send_wr; - - /* These caps are limited by rxe_qp_chk_cap() done by the caller */ - wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), - init->cap.max_inline_data); - qp->sq.max_sge = init->cap.max_send_sge = - wqe_size / sizeof(struct ib_sge); - qp->sq.max_inline = init->cap.max_inline_data = wqe_size; - wqe_size += sizeof(struct rxe_send_wqe); - - type = QUEUE_TYPE_FROM_CLIENT; - qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, - wqe_size, type); - if (!qp->sq.queue) - return -ENOMEM; - - err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, - qp->sq.queue->buf, qp->sq.queue->buf_size, - &qp->sq.queue->ip); - - if (err) { - vfree(qp->sq.queue->buf); - kfree(qp->sq.queue); - qp->sq.queue = NULL; - return err; - } qp->req.wqe_index = queue_get_producer(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT); @@ -240,57 +259,71 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, qp->req.opcode = -1; qp->comp.opcode = -1; - skb_queue_head_init(&qp->req_pkts); - rxe_init_task(&qp->req.task, qp, rxe_requester, "req"); rxe_init_task(&qp->comp.task, qp, rxe_completer, "comp"); qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ - if (init->qp_type == IB_QPT_RC) { + if (init->qp_type == IB_QPT_RC || init->qp_type == IB_QPT_XRC_INI) { timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); timer_setup(&qp->retrans_timer, retransmit_timer, 0); } return 0; } +static int rxe_prepare_recv_queue(struct rxe_dev *rxe, struct rxe_qp *qp, + struct ib_qp_init_attr *init, struct ib_udata *udata, + struct rxe_create_qp_resp __user *uresp) +{ + struct rxe_queue *q; + int wqe_size; + int err; + + qp->rq.max_wr = init->cap.max_recv_wr; + qp->rq.max_sge = init->cap.max_recv_sge; + + wqe_size = sizeof(struct rxe_recv_wqe) + + qp->rq.max_sge*sizeof(struct ib_sge); + + q = rxe_queue_init(rxe, &qp->rq.max_wr, wqe_size, + QUEUE_TYPE_FROM_CLIENT); + if (!q) + return -ENOMEM; + + err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, + q->buf, q->buf_size, &q->ip); + + if (err) { + vfree(q->buf); + kfree(q); + return err; + } + + qp->rq.queue = q; + + return 0; +} + static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_init_attr *init, struct ib_udata *udata, struct rxe_create_qp_resp __user *uresp) { int err; - int wqe_size; - enum queue_type type; - if (!qp->srq) { - qp->rq.max_wr = init->cap.max_recv_wr; - qp->rq.max_sge = init->cap.max_recv_sge; - - wqe_size = rcv_wqe_size(qp->rq.max_sge); - - pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", - qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); - - type = QUEUE_TYPE_FROM_CLIENT; - qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, - wqe_size, type); - if (!qp->rq.queue) - return -ENOMEM; - - err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, - qp->rq.queue->buf, qp->rq.queue->buf_size, - &qp->rq.queue->ip); - if (err) { - vfree(qp->rq.queue->buf); - kfree(qp->rq.queue); - qp->rq.queue = NULL; + if (!qp->srq && qp_type(qp) != IB_QPT_XRC_TGT) { + err = rxe_prepare_recv_queue(rxe, qp, init, udata, uresp); + if (err) return err; - } + + spin_lock_init(&qp->rq.producer_lock); + spin_lock_init(&qp->rq.consumer_lock); } - skb_queue_head_init(&qp->resp_pkts); + spin_lock_init(&qp->resp.task.state_lock); + + skb_queue_head_init(&qp->req_pkts); rxe_init_task(&qp->resp.task, qp, rxe_responder, "resp"); @@ -303,64 +336,82 @@ static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, } /* called by the create qp verb */ -int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, +int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct ib_qp_init_attr *init, struct rxe_create_qp_resp __user *uresp, - struct ib_pd *ibpd, struct ib_udata *udata) { int err; + struct rxe_pd *pd = to_rpd(qp->ibqp.pd); struct rxe_cq *rcq = to_rcq(init->recv_cq); struct rxe_cq *scq = to_rcq(init->send_cq); - struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; + struct rxe_srq *srq = to_rsrq(init->srq); + struct rxe_xrcd *xrcd = to_rxrcd(init->xrcd); - rxe_get(pd); - rxe_get(rcq); - rxe_get(scq); - if (srq) + if (pd) { + rxe_get(pd); + qp->pd = pd; + } + if (rcq) { + rxe_get(rcq); + qp->rcq = rcq; + atomic_inc(&rcq->num_wq); + } + if (scq) { + rxe_get(scq); + qp->scq = scq; + atomic_inc(&scq->num_wq); + } + if (srq) { rxe_get(srq); - - qp->pd = pd; - qp->rcq = rcq; - qp->scq = scq; - qp->srq = srq; - - atomic_inc(&rcq->num_wq); - atomic_inc(&scq->num_wq); + qp->srq = srq; + } + if (xrcd) { + rxe_get(xrcd); + qp->xrcd = xrcd; + } rxe_qp_init_misc(rxe, qp, init); - err = rxe_qp_init_req(rxe, qp, init, udata, uresp); - if (err) - goto err1; + switch (init->qp_type) { + case IB_QPT_RC: + case IB_QPT_UC: + case IB_QPT_GSI: + case IB_QPT_UD: + err = rxe_qp_init_req(rxe, qp, init, udata, uresp); + if (err) + goto err_out; - err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); - if (err) - goto err2; + err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); + if (err) + goto err_unwind; + break; + case IB_QPT_XRC_INI: + err = rxe_qp_init_req(rxe, qp, init, udata, uresp); + if (err) + goto err_out; + break; + case IB_QPT_XRC_TGT: + err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); + if (err) + goto err_out; + break; + default: + /* not reached */ + err = -EOPNOTSUPP; + goto err_out; + }; qp->attr.qp_state = IB_QPS_RESET; qp->valid = 1; return 0; -err2: +err_unwind: rxe_queue_cleanup(qp->sq.queue); qp->sq.queue = NULL; -err1: - atomic_dec(&rcq->num_wq); - atomic_dec(&scq->num_wq); - - qp->pd = NULL; - qp->rcq = NULL; - qp->scq = NULL; - qp->srq = NULL; - - if (srq) - rxe_put(srq); - rxe_put(scq); - rxe_put(rcq); - rxe_put(pd); - +err_out: + /* rxe_qp_cleanup handles the rest */ return err; } @@ -485,7 +536,8 @@ static void rxe_qp_reset(struct rxe_qp *qp) /* stop request/comp */ if (qp->sq.queue) { - if (qp_type(qp) == IB_QPT_RC) + if (qp_type(qp) == IB_QPT_RC || + qp_type(qp) == IB_QPT_XRC_INI) rxe_disable_task(&qp->comp.task); rxe_disable_task(&qp->req.task); } @@ -529,7 +581,8 @@ static void rxe_qp_reset(struct rxe_qp *qp) rxe_enable_task(&qp->resp.task); if (qp->sq.queue) { - if (qp_type(qp) == IB_QPT_RC) + if (qp_type(qp) == IB_QPT_RC || + qp_type(qp) == IB_QPT_XRC_INI) rxe_enable_task(&qp->comp.task); rxe_enable_task(&qp->req.task); @@ -542,7 +595,8 @@ static void rxe_qp_drain(struct rxe_qp *qp) if (qp->sq.queue) { if (qp->req.state != QP_STATE_DRAINED) { qp->req.state = QP_STATE_DRAIN; - if (qp_type(qp) == IB_QPT_RC) + if (qp_type(qp) == IB_QPT_RC || + qp_type(qp) == IB_QPT_XRC_INI) rxe_run_task(&qp->comp.task, 1); else __rxe_do_task(&qp->comp.task); @@ -562,7 +616,7 @@ void rxe_qp_error(struct rxe_qp *qp) /* drain work and packet queues */ rxe_run_task(&qp->resp.task, 1); - if (qp_type(qp) == IB_QPT_RC) + if (qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_XRC_INI) rxe_run_task(&qp->comp.task, 1); else __rxe_do_task(&qp->comp.task); @@ -672,7 +726,8 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); qp->req.psn = qp->attr.sq_psn; qp->comp.psn = qp->attr.sq_psn; - pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); + pr_debug("qp#%d set req psn = %d comp psn = %d\n", qp_num(qp), + qp->req.psn, qp->comp.psn); } if (mask & IB_QP_PATH_MIG_STATE) @@ -787,7 +842,7 @@ static void rxe_qp_do_cleanup(struct work_struct *work) qp->qp_timeout_jiffies = 0; rxe_cleanup_task(&qp->resp.task); - if (qp_type(qp) == IB_QPT_RC) { + if (qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_XRC_INI) { del_timer_sync(&qp->retrans_timer); del_timer_sync(&qp->rnr_nak_timer); } @@ -807,6 +862,9 @@ static void rxe_qp_do_cleanup(struct work_struct *work) if (qp->sq.queue) rxe_queue_cleanup(qp->sq.queue); + if (qp->xrcd) + rxe_put(qp->xrcd); + if (qp->srq) rxe_put(qp->srq); @@ -829,7 +887,7 @@ static void rxe_qp_do_cleanup(struct work_struct *work) if (qp->resp.mr) rxe_put(qp->resp.mr); - if (qp_type(qp) == IB_QPT_RC) + if (qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_XRC_INI) sk_dst_reset(qp->sk->sk); free_rd_atomic_resources(qp); diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index cee31b650fe0..b490f7d53d72 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -415,7 +415,6 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, { int err; struct rxe_dev *rxe = to_rdev(ibqp->device); - struct rxe_pd *pd = to_rpd(ibqp->pd); struct rxe_qp *qp = to_rqp(ibqp); struct rxe_create_qp_resp __user *uresp = NULL; @@ -423,16 +422,7 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, if (udata->outlen < sizeof(*uresp)) return -EINVAL; uresp = udata->outbuf; - } - - if (init->create_flags) - return -EOPNOTSUPP; - err = rxe_qp_chk_init(rxe, init); - if (err) - return err; - - if (udata) { if (udata->inlen) return -EINVAL; @@ -441,11 +431,15 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, qp->is_user = false; } + err = rxe_qp_chk_init(rxe, ibqp, init); + if (err) + return err; + err = rxe_add_to_pool(&rxe->qp_pool, qp); if (err) return err; - err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata); + err = rxe_qp_from_init(rxe, qp, init, uresp, udata); if (err) goto qp_init; @@ -516,6 +510,9 @@ static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr, int num_sge = ibwr->num_sge; struct rxe_sq *sq = &qp->sq; + if (unlikely(qp_type(qp) == IB_QPT_XRC_TGT)) + return -EOPNOTSUPP; + if (unlikely(num_sge > sq->max_sge)) goto err1; @@ -739,8 +736,9 @@ static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, /* Utilize process context to do protocol processing */ rxe_run_task(&qp->req.task, 0); return 0; - } else + } else { return rxe_post_send_kernel(qp, wr, bad_wr); + } } static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h index 465af1517112..582ffdecb9e9 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.h +++ b/drivers/infiniband/sw/rxe/rxe_verbs.h @@ -230,6 +230,7 @@ struct rxe_qp { struct rxe_srq *srq; struct rxe_cq *scq; struct rxe_cq *rcq; + struct rxe_xrcd *xrcd; enum ib_sig_type sq_sig_type;

[for-next,v2,08/13] RDMA/rxe: Extend rxe_qp.c to support xrc qps

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