2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/dma-mapping.h>
37 #include "rxe_queue.h"
39 static int rxe_query_device(struct ib_device *dev,
40 struct ib_device_attr *attr,
43 struct rxe_dev *rxe = to_rdev(dev);
45 if (uhw->inlen || uhw->outlen)
52 static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed,
56 *active_width = IB_WIDTH_1X;
57 *active_speed = IB_SPEED_SDR;
58 } else if (speed <= 10000) {
59 *active_width = IB_WIDTH_1X;
60 *active_speed = IB_SPEED_FDR10;
61 } else if (speed <= 20000) {
62 *active_width = IB_WIDTH_4X;
63 *active_speed = IB_SPEED_DDR;
64 } else if (speed <= 30000) {
65 *active_width = IB_WIDTH_4X;
66 *active_speed = IB_SPEED_QDR;
67 } else if (speed <= 40000) {
68 *active_width = IB_WIDTH_4X;
69 *active_speed = IB_SPEED_FDR10;
71 *active_width = IB_WIDTH_4X;
72 *active_speed = IB_SPEED_EDR;
76 static int rxe_query_port(struct ib_device *dev,
77 u8 port_num, struct ib_port_attr *attr)
79 struct rxe_dev *rxe = to_rdev(dev);
80 struct rxe_port *port;
83 if (unlikely(port_num != 1)) {
84 pr_warn("invalid port_number %d\n", port_num);
90 /* *attr being zeroed by the caller, avoid zeroing it here */
93 mutex_lock(&rxe->usdev_lock);
94 if (rxe->ndev->ethtool_ops->get_link_ksettings) {
95 struct ethtool_link_ksettings ks;
97 rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks);
98 speed = ks.base.speed;
99 } else if (rxe->ndev->ethtool_ops->get_settings) {
100 struct ethtool_cmd cmd;
102 rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd);
105 pr_warn("%s speed is unknown, defaulting to 1000\n",
109 rxe_eth_speed_to_ib_speed(speed, &attr->active_speed,
110 &attr->active_width);
111 mutex_unlock(&rxe->usdev_lock);
119 static int rxe_query_gid(struct ib_device *device,
120 u8 port_num, int index, union ib_gid *gid)
124 if (index > RXE_PORT_GID_TBL_LEN)
127 ret = ib_get_cached_gid(device, port_num, index, gid, NULL);
128 if (ret == -EAGAIN) {
129 memcpy(gid, &zgid, sizeof(*gid));
136 static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int
137 index, const union ib_gid *gid,
138 const struct ib_gid_attr *attr, void **context)
140 if (index >= RXE_PORT_GID_TBL_LEN)
145 static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int
146 index, void **context)
148 if (index >= RXE_PORT_GID_TBL_LEN)
153 static struct net_device *rxe_get_netdev(struct ib_device *device,
156 struct rxe_dev *rxe = to_rdev(device);
166 static int rxe_query_pkey(struct ib_device *device,
167 u8 port_num, u16 index, u16 *pkey)
169 struct rxe_dev *rxe = to_rdev(device);
170 struct rxe_port *port;
172 if (unlikely(port_num != 1)) {
173 dev_warn(device->dev.parent, "invalid port_num = %d\n",
180 if (unlikely(index >= port->attr.pkey_tbl_len)) {
181 dev_warn(device->dev.parent, "invalid index = %d\n",
186 *pkey = port->pkey_tbl[index];
193 static int rxe_modify_device(struct ib_device *dev,
194 int mask, struct ib_device_modify *attr)
196 struct rxe_dev *rxe = to_rdev(dev);
198 if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
199 rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
201 if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
202 memcpy(rxe->ib_dev.node_desc,
203 attr->node_desc, sizeof(rxe->ib_dev.node_desc));
209 static int rxe_modify_port(struct ib_device *dev,
210 u8 port_num, int mask, struct ib_port_modify *attr)
212 struct rxe_dev *rxe = to_rdev(dev);
213 struct rxe_port *port;
215 if (unlikely(port_num != 1)) {
216 pr_warn("invalid port_num = %d\n", port_num);
222 port->attr.port_cap_flags |= attr->set_port_cap_mask;
223 port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
225 if (mask & IB_PORT_RESET_QKEY_CNTR)
226 port->attr.qkey_viol_cntr = 0;
234 static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
237 struct rxe_dev *rxe = to_rdev(dev);
239 return rxe_link_layer(rxe, port_num);
242 static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev,
243 struct ib_udata *udata)
245 struct rxe_dev *rxe = to_rdev(dev);
246 struct rxe_ucontext *uc;
248 uc = rxe_alloc(&rxe->uc_pool);
249 return uc ? &uc->ibuc : ERR_PTR(-ENOMEM);
252 static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
254 struct rxe_ucontext *uc = to_ruc(ibuc);
260 static int rxe_port_immutable(struct ib_device *dev, u8 port_num,
261 struct ib_port_immutable *immutable)
264 struct ib_port_attr attr;
266 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
268 err = ib_query_port(dev, port_num, &attr);
272 immutable->pkey_tbl_len = attr.pkey_tbl_len;
273 immutable->gid_tbl_len = attr.gid_tbl_len;
274 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
279 static struct ib_pd *rxe_alloc_pd(struct ib_device *dev,
280 struct ib_ucontext *context,
281 struct ib_udata *udata)
283 struct rxe_dev *rxe = to_rdev(dev);
286 pd = rxe_alloc(&rxe->pd_pool);
287 return pd ? &pd->ibpd : ERR_PTR(-ENOMEM);
290 static int rxe_dealloc_pd(struct ib_pd *ibpd)
292 struct rxe_pd *pd = to_rpd(ibpd);
298 static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr,
303 struct ib_gid_attr sgid_attr;
305 err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num,
306 attr->grh.sgid_index, &sgid,
309 pr_err("Failed to query sgid. err = %d\n", err);
313 err = rxe_av_from_attr(rxe, attr->port_num, av, attr);
315 err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid);
318 dev_put(sgid_attr.ndev);
322 static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr,
323 struct ib_udata *udata)
327 struct rxe_dev *rxe = to_rdev(ibpd->device);
328 struct rxe_pd *pd = to_rpd(ibpd);
331 err = rxe_av_chk_attr(rxe, attr);
335 ah = rxe_alloc(&rxe->ah_pool);
344 err = rxe_init_av(rxe, attr, &ah->av);
357 static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
360 struct rxe_dev *rxe = to_rdev(ibah->device);
361 struct rxe_ah *ah = to_rah(ibah);
363 err = rxe_av_chk_attr(rxe, attr);
367 err = rxe_init_av(rxe, attr, &ah->av);
374 static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
376 struct rxe_dev *rxe = to_rdev(ibah->device);
377 struct rxe_ah *ah = to_rah(ibah);
379 rxe_av_to_attr(rxe, &ah->av, attr);
383 static int rxe_destroy_ah(struct ib_ah *ibah)
385 struct rxe_ah *ah = to_rah(ibah);
387 rxe_drop_ref(ah->pd);
392 static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr)
397 struct rxe_recv_wqe *recv_wqe;
398 int num_sge = ibwr->num_sge;
400 if (unlikely(queue_full(rq->queue))) {
405 if (unlikely(num_sge > rq->max_sge)) {
411 for (i = 0; i < num_sge; i++)
412 length += ibwr->sg_list[i].length;
414 recv_wqe = producer_addr(rq->queue);
415 recv_wqe->wr_id = ibwr->wr_id;
416 recv_wqe->num_sge = num_sge;
418 memcpy(recv_wqe->dma.sge, ibwr->sg_list,
419 num_sge * sizeof(struct ib_sge));
421 recv_wqe->dma.length = length;
422 recv_wqe->dma.resid = length;
423 recv_wqe->dma.num_sge = num_sge;
424 recv_wqe->dma.cur_sge = 0;
425 recv_wqe->dma.sge_offset = 0;
427 /* make sure all changes to the work queue are written before we
428 * update the producer pointer
432 advance_producer(rq->queue);
439 static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd,
440 struct ib_srq_init_attr *init,
441 struct ib_udata *udata)
444 struct rxe_dev *rxe = to_rdev(ibpd->device);
445 struct rxe_pd *pd = to_rpd(ibpd);
447 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
449 err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK);
453 srq = rxe_alloc(&rxe->srq_pool);
463 err = rxe_srq_from_init(rxe, srq, init, context, udata);
477 static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
478 enum ib_srq_attr_mask mask,
479 struct ib_udata *udata)
482 struct rxe_srq *srq = to_rsrq(ibsrq);
483 struct rxe_dev *rxe = to_rdev(ibsrq->device);
485 err = rxe_srq_chk_attr(rxe, srq, attr, mask);
489 err = rxe_srq_from_attr(rxe, srq, attr, mask, udata);
499 static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
501 struct rxe_srq *srq = to_rsrq(ibsrq);
506 attr->max_wr = srq->rq.queue->buf->index_mask;
507 attr->max_sge = srq->rq.max_sge;
508 attr->srq_limit = srq->limit;
512 static int rxe_destroy_srq(struct ib_srq *ibsrq)
514 struct rxe_srq *srq = to_rsrq(ibsrq);
517 rxe_queue_cleanup(srq->rq.queue);
519 rxe_drop_ref(srq->pd);
526 static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
527 struct ib_recv_wr **bad_wr)
531 struct rxe_srq *srq = to_rsrq(ibsrq);
533 spin_lock_irqsave(&srq->rq.producer_lock, flags);
536 err = post_one_recv(&srq->rq, wr);
542 spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
550 static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd,
551 struct ib_qp_init_attr *init,
552 struct ib_udata *udata)
555 struct rxe_dev *rxe = to_rdev(ibpd->device);
556 struct rxe_pd *pd = to_rpd(ibpd);
559 err = rxe_qp_chk_init(rxe, init);
563 qp = rxe_alloc(&rxe->qp_pool);
579 err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd);
593 static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
594 int mask, struct ib_udata *udata)
597 struct rxe_dev *rxe = to_rdev(ibqp->device);
598 struct rxe_qp *qp = to_rqp(ibqp);
600 err = rxe_qp_chk_attr(rxe, qp, attr, mask);
604 err = rxe_qp_from_attr(qp, attr, mask, udata);
614 static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
615 int mask, struct ib_qp_init_attr *init)
617 struct rxe_qp *qp = to_rqp(ibqp);
619 rxe_qp_to_init(qp, init);
620 rxe_qp_to_attr(qp, attr, mask);
625 static int rxe_destroy_qp(struct ib_qp *ibqp)
627 struct rxe_qp *qp = to_rqp(ibqp);
635 static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr,
636 unsigned int mask, unsigned int length)
638 int num_sge = ibwr->num_sge;
639 struct rxe_sq *sq = &qp->sq;
641 if (unlikely(num_sge > sq->max_sge))
644 if (unlikely(mask & WR_ATOMIC_MASK)) {
648 if (atomic_wr(ibwr)->remote_addr & 0x7)
652 if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
653 (length > sq->max_inline)))
662 static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
663 struct ib_send_wr *ibwr)
665 wr->wr_id = ibwr->wr_id;
666 wr->num_sge = ibwr->num_sge;
667 wr->opcode = ibwr->opcode;
668 wr->send_flags = ibwr->send_flags;
670 if (qp_type(qp) == IB_QPT_UD ||
671 qp_type(qp) == IB_QPT_SMI ||
672 qp_type(qp) == IB_QPT_GSI) {
673 wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
674 wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
675 if (qp_type(qp) == IB_QPT_GSI)
676 wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
677 if (wr->opcode == IB_WR_SEND_WITH_IMM)
678 wr->ex.imm_data = ibwr->ex.imm_data;
680 switch (wr->opcode) {
681 case IB_WR_RDMA_WRITE_WITH_IMM:
682 wr->ex.imm_data = ibwr->ex.imm_data;
683 case IB_WR_RDMA_READ:
684 case IB_WR_RDMA_WRITE:
685 wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
686 wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey;
688 case IB_WR_SEND_WITH_IMM:
689 wr->ex.imm_data = ibwr->ex.imm_data;
691 case IB_WR_SEND_WITH_INV:
692 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
694 case IB_WR_ATOMIC_CMP_AND_SWP:
695 case IB_WR_ATOMIC_FETCH_AND_ADD:
696 wr->wr.atomic.remote_addr =
697 atomic_wr(ibwr)->remote_addr;
698 wr->wr.atomic.compare_add =
699 atomic_wr(ibwr)->compare_add;
700 wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
701 wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
703 case IB_WR_LOCAL_INV:
704 wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
707 wr->wr.reg.mr = reg_wr(ibwr)->mr;
708 wr->wr.reg.key = reg_wr(ibwr)->key;
709 wr->wr.reg.access = reg_wr(ibwr)->access;
717 static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr,
718 unsigned int mask, unsigned int length,
719 struct rxe_send_wqe *wqe)
721 int num_sge = ibwr->num_sge;
726 init_send_wr(qp, &wqe->wr, ibwr);
728 if (qp_type(qp) == IB_QPT_UD ||
729 qp_type(qp) == IB_QPT_SMI ||
730 qp_type(qp) == IB_QPT_GSI)
731 memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av));
733 if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) {
734 p = wqe->dma.inline_data;
737 for (i = 0; i < num_sge; i++, sge++) {
738 if (qp->is_user && copy_from_user(p, (__user void *)
739 (uintptr_t)sge->addr, sge->length))
742 else if (!qp->is_user)
743 memcpy(p, (void *)(uintptr_t)sge->addr,
748 } else if (mask & WR_REG_MASK) {
750 wqe->state = wqe_state_posted;
753 memcpy(wqe->dma.sge, ibwr->sg_list,
754 num_sge * sizeof(struct ib_sge));
756 wqe->iova = (mask & WR_ATOMIC_MASK) ?
757 atomic_wr(ibwr)->remote_addr :
758 rdma_wr(ibwr)->remote_addr;
760 wqe->dma.length = length;
761 wqe->dma.resid = length;
762 wqe->dma.num_sge = num_sge;
763 wqe->dma.cur_sge = 0;
764 wqe->dma.sge_offset = 0;
765 wqe->state = wqe_state_posted;
766 wqe->ssn = atomic_add_return(1, &qp->ssn);
771 static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr,
772 unsigned int mask, u32 length)
775 struct rxe_sq *sq = &qp->sq;
776 struct rxe_send_wqe *send_wqe;
779 err = validate_send_wr(qp, ibwr, mask, length);
783 spin_lock_irqsave(&qp->sq.sq_lock, flags);
785 if (unlikely(queue_full(sq->queue))) {
790 send_wqe = producer_addr(sq->queue);
792 err = init_send_wqe(qp, ibwr, mask, length, send_wqe);
797 * make sure all changes to the work queue are
798 * written before we update the producer pointer
802 advance_producer(sq->queue);
803 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
808 spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
812 static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
813 struct ib_send_wr **bad_wr)
817 unsigned int length = 0;
822 mask = wr_opcode_mask(wr->opcode, qp);
823 if (unlikely(!mask)) {
829 if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
830 !(mask & WR_INLINE_MASK))) {
837 for (i = 0; i < wr->num_sge; i++)
838 length += wr->sg_list[i].length;
840 err = post_one_send(qp, wr, mask, length);
850 * Must sched in case of GSI QP because ib_send_mad() hold irq lock,
851 * and the requester call ip_local_out_sk() that takes spin_lock_bh.
853 must_sched = (qp_type(qp) == IB_QPT_GSI) ||
854 (queue_count(qp->sq.queue) > 1);
856 rxe_run_task(&qp->req.task, must_sched);
861 static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
862 struct ib_send_wr **bad_wr)
864 struct rxe_qp *qp = to_rqp(ibqp);
866 if (unlikely(!qp->valid)) {
871 if (unlikely(qp->req.state < QP_STATE_READY)) {
877 /* Utilize process context to do protocol processing */
878 rxe_run_task(&qp->req.task, 0);
881 return rxe_post_send_kernel(qp, wr, bad_wr);
884 static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
885 struct ib_recv_wr **bad_wr)
888 struct rxe_qp *qp = to_rqp(ibqp);
889 struct rxe_rq *rq = &qp->rq;
892 if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
898 if (unlikely(qp->srq)) {
904 spin_lock_irqsave(&rq->producer_lock, flags);
907 err = post_one_recv(rq, wr);
915 spin_unlock_irqrestore(&rq->producer_lock, flags);
921 static struct ib_cq *rxe_create_cq(struct ib_device *dev,
922 const struct ib_cq_init_attr *attr,
923 struct ib_ucontext *context,
924 struct ib_udata *udata)
927 struct rxe_dev *rxe = to_rdev(dev);
931 return ERR_PTR(-EINVAL);
933 err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata);
937 cq = rxe_alloc(&rxe->cq_pool);
943 err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector,
956 static int rxe_destroy_cq(struct ib_cq *ibcq)
958 struct rxe_cq *cq = to_rcq(ibcq);
964 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
967 struct rxe_cq *cq = to_rcq(ibcq);
968 struct rxe_dev *rxe = to_rdev(ibcq->device);
970 err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata);
974 err = rxe_cq_resize_queue(cq, cqe, udata);
984 static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
987 struct rxe_cq *cq = to_rcq(ibcq);
991 spin_lock_irqsave(&cq->cq_lock, flags);
992 for (i = 0; i < num_entries; i++) {
993 cqe = queue_head(cq->queue);
997 memcpy(wc++, &cqe->ibwc, sizeof(*wc));
998 advance_consumer(cq->queue);
1000 spin_unlock_irqrestore(&cq->cq_lock, flags);
1005 static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
1007 struct rxe_cq *cq = to_rcq(ibcq);
1008 int count = queue_count(cq->queue);
1010 return (count > wc_cnt) ? wc_cnt : count;
1013 static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
1015 struct rxe_cq *cq = to_rcq(ibcq);
1016 unsigned long irq_flags;
1019 spin_lock_irqsave(&cq->cq_lock, irq_flags);
1020 if (cq->notify != IB_CQ_NEXT_COMP)
1021 cq->notify = flags & IB_CQ_SOLICITED_MASK;
1023 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue))
1026 spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
1031 static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
1033 struct rxe_dev *rxe = to_rdev(ibpd->device);
1034 struct rxe_pd *pd = to_rpd(ibpd);
1038 mr = rxe_alloc(&rxe->mr_pool);
1048 err = rxe_mem_init_dma(rxe, pd, access, mr);
1059 return ERR_PTR(err);
1062 static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
1066 int access, struct ib_udata *udata)
1069 struct rxe_dev *rxe = to_rdev(ibpd->device);
1070 struct rxe_pd *pd = to_rpd(ibpd);
1073 mr = rxe_alloc(&rxe->mr_pool);
1083 err = rxe_mem_init_user(rxe, pd, start, length, iova,
1095 return ERR_PTR(err);
1098 static int rxe_dereg_mr(struct ib_mr *ibmr)
1100 struct rxe_mem *mr = to_rmr(ibmr);
1102 mr->state = RXE_MEM_STATE_ZOMBIE;
1103 rxe_drop_ref(mr->pd);
1109 static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd,
1110 enum ib_mr_type mr_type,
1113 struct rxe_dev *rxe = to_rdev(ibpd->device);
1114 struct rxe_pd *pd = to_rpd(ibpd);
1118 if (mr_type != IB_MR_TYPE_MEM_REG)
1119 return ERR_PTR(-EINVAL);
1121 mr = rxe_alloc(&rxe->mr_pool);
1131 err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr);
1142 return ERR_PTR(err);
1145 static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
1147 struct rxe_mem *mr = to_rmr(ibmr);
1148 struct rxe_map *map;
1149 struct rxe_phys_buf *buf;
1151 if (unlikely(mr->nbuf == mr->num_buf))
1154 map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
1155 buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
1158 buf->size = ibmr->page_size;
1164 static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
1165 int sg_nents, unsigned int *sg_offset)
1167 struct rxe_mem *mr = to_rmr(ibmr);
1172 n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
1174 mr->va = ibmr->iova;
1175 mr->iova = ibmr->iova;
1176 mr->length = ibmr->length;
1177 mr->page_shift = ilog2(ibmr->page_size);
1178 mr->page_mask = ibmr->page_size - 1;
1179 mr->offset = mr->iova & mr->page_mask;
1184 static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1187 struct rxe_dev *rxe = to_rdev(ibqp->device);
1188 struct rxe_qp *qp = to_rqp(ibqp);
1189 struct rxe_mc_grp *grp;
1191 /* takes a ref on grp if successful */
1192 err = rxe_mcast_get_grp(rxe, mgid, &grp);
1196 err = rxe_mcast_add_grp_elem(rxe, qp, grp);
1202 static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid)
1204 struct rxe_dev *rxe = to_rdev(ibqp->device);
1205 struct rxe_qp *qp = to_rqp(ibqp);
1207 return rxe_mcast_drop_grp_elem(rxe, qp, mgid);
1210 static ssize_t rxe_show_parent(struct device *device,
1211 struct device_attribute *attr, char *buf)
1213 struct rxe_dev *rxe = container_of(device, struct rxe_dev,
1216 return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1));
1219 static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL);
1221 static struct device_attribute *rxe_dev_attributes[] = {
1225 int rxe_register_device(struct rxe_dev *rxe)
1229 struct ib_device *dev = &rxe->ib_dev;
1231 strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX);
1232 strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
1234 dev->owner = THIS_MODULE;
1235 dev->node_type = RDMA_NODE_IB_CA;
1236 dev->phys_port_cnt = 1;
1237 dev->num_comp_vectors = RXE_NUM_COMP_VECTORS;
1238 dev->dev.parent = rxe_dma_device(rxe);
1239 dev->local_dma_lkey = 0;
1240 dev->node_guid = rxe_node_guid(rxe);
1241 dev->dev.dma_ops = &dma_virt_ops;
1243 dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION;
1244 dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT)
1245 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)
1246 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE)
1247 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT)
1248 | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD)
1249 | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD)
1250 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ)
1251 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ)
1252 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ)
1253 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ)
1254 | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV)
1255 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP)
1256 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP)
1257 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP)
1258 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP)
1259 | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND)
1260 | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV)
1261 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ)
1262 | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ)
1263 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ)
1264 | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ)
1265 | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ)
1266 | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)
1267 | BIT_ULL(IB_USER_VERBS_CMD_REG_MR)
1268 | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR)
1269 | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH)
1270 | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH)
1271 | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH)
1272 | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH)
1273 | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST)
1274 | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST)
1277 dev->query_device = rxe_query_device;
1278 dev->modify_device = rxe_modify_device;
1279 dev->query_port = rxe_query_port;
1280 dev->modify_port = rxe_modify_port;
1281 dev->get_link_layer = rxe_get_link_layer;
1282 dev->query_gid = rxe_query_gid;
1283 dev->get_netdev = rxe_get_netdev;
1284 dev->add_gid = rxe_add_gid;
1285 dev->del_gid = rxe_del_gid;
1286 dev->query_pkey = rxe_query_pkey;
1287 dev->alloc_ucontext = rxe_alloc_ucontext;
1288 dev->dealloc_ucontext = rxe_dealloc_ucontext;
1289 dev->mmap = rxe_mmap;
1290 dev->get_port_immutable = rxe_port_immutable;
1291 dev->alloc_pd = rxe_alloc_pd;
1292 dev->dealloc_pd = rxe_dealloc_pd;
1293 dev->create_ah = rxe_create_ah;
1294 dev->modify_ah = rxe_modify_ah;
1295 dev->query_ah = rxe_query_ah;
1296 dev->destroy_ah = rxe_destroy_ah;
1297 dev->create_srq = rxe_create_srq;
1298 dev->modify_srq = rxe_modify_srq;
1299 dev->query_srq = rxe_query_srq;
1300 dev->destroy_srq = rxe_destroy_srq;
1301 dev->post_srq_recv = rxe_post_srq_recv;
1302 dev->create_qp = rxe_create_qp;
1303 dev->modify_qp = rxe_modify_qp;
1304 dev->query_qp = rxe_query_qp;
1305 dev->destroy_qp = rxe_destroy_qp;
1306 dev->post_send = rxe_post_send;
1307 dev->post_recv = rxe_post_recv;
1308 dev->create_cq = rxe_create_cq;
1309 dev->destroy_cq = rxe_destroy_cq;
1310 dev->resize_cq = rxe_resize_cq;
1311 dev->poll_cq = rxe_poll_cq;
1312 dev->peek_cq = rxe_peek_cq;
1313 dev->req_notify_cq = rxe_req_notify_cq;
1314 dev->get_dma_mr = rxe_get_dma_mr;
1315 dev->reg_user_mr = rxe_reg_user_mr;
1316 dev->dereg_mr = rxe_dereg_mr;
1317 dev->alloc_mr = rxe_alloc_mr;
1318 dev->map_mr_sg = rxe_map_mr_sg;
1319 dev->attach_mcast = rxe_attach_mcast;
1320 dev->detach_mcast = rxe_detach_mcast;
1322 err = ib_register_device(dev, NULL);
1324 pr_warn("rxe_register_device failed, err = %d\n", err);
1328 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) {
1329 err = device_create_file(&dev->dev, rxe_dev_attributes[i]);
1331 pr_warn("device_create_file failed, i = %d, err = %d\n",
1340 ib_unregister_device(dev);
1345 int rxe_unregister_device(struct rxe_dev *rxe)
1348 struct ib_device *dev = &rxe->ib_dev;
1350 for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i)
1351 device_remove_file(&dev->dev, rxe_dev_attributes[i]);
1353 ib_unregister_device(dev);