net/smc/smc_ib.c

47 static int smc_ib_modify_qp_init(struct smc_link *lnk)
54 	qp_attr.port_num = lnk->ibport;
57 	return ib_modify_qp(lnk->roce_qp, &qp_attr,
62 static int smc_ib_modify_qp_rtr(struct smc_link *lnk)
72 	qp_attr.path_mtu = min(lnk->path_mtu, lnk->peer_mtu);
74 	rdma_ah_set_port_num(&qp_attr.ah_attr, lnk->ibport);
75 	if (lnk->lgr->smc_version == SMC_V2 && lnk->lgr->uses_gateway)
77 	rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, lnk->sgid_index, hop_lim, 0);
78 	rdma_ah_set_dgid_raw(&qp_attr.ah_attr, lnk->peer_gid);
79 	if (lnk->lgr->smc_version == SMC_V2 && lnk->lgr->uses_gateway)
80 		memcpy(&qp_attr.ah_attr.roce.dmac, lnk->lgr->nexthop_mac,
81 		       sizeof(lnk->lgr->nexthop_mac));
83 		memcpy(&qp_attr.ah_attr.roce.dmac, lnk->peer_mac,
84 		       sizeof(lnk->peer_mac));
85 	qp_attr.dest_qp_num = lnk->peer_qpn;
86 	qp_attr.rq_psn = lnk->peer_psn; /* starting receive packet seq # */
92 	return ib_modify_qp(lnk->roce_qp, &qp_attr, qp_attr_mask);
95 int smc_ib_modify_qp_rts(struct smc_link *lnk)
104 	qp_attr.sq_psn = lnk->psn_initial;	/* starting send packet seq # */
108 	return ib_modify_qp(lnk->roce_qp, &qp_attr,
114 int smc_ib_modify_qp_error(struct smc_link *lnk)
120 	return ib_modify_qp(lnk->roce_qp, &qp_attr, IB_QP_STATE);
123 int smc_ib_ready_link(struct smc_link *lnk)
125 	struct smc_link_group *lgr = smc_get_lgr(lnk);
128 	rc = smc_ib_modify_qp_init(lnk);
132 	rc = smc_ib_modify_qp_rtr(lnk);
135 	smc_wr_remember_qp_attr(lnk);
136 	rc = ib_req_notify_cq(lnk->smcibdev->roce_cq_recv,
140 	rc = smc_wr_rx_post_init(lnk);
143 	smc_wr_remember_qp_attr(lnk);
146 		rc = smc_ib_modify_qp_rts(lnk);
149 		smc_wr_remember_qp_attr(lnk);
346 			if (lgr->lnk[i].state == SMC_LNK_UNUSED ||
347 			    lgr->lnk[i].smcibdev != smcibdev)
349 			if (!smc_ib_check_link_gid(lgr->lnk[i].gid,
451 void smc_ib_dealloc_protection_domain(struct smc_link *lnk)
453 	if (lnk->roce_pd)
454 		ib_dealloc_pd(lnk->roce_pd);
455 	lnk->roce_pd = NULL;
458 int smc_ib_create_protection_domain(struct smc_link *lnk)
462 	lnk->roce_pd = ib_alloc_pd(lnk->smcibdev->ibdev, 0);
463 	rc = PTR_ERR_OR_ZERO(lnk->roce_pd);
464 	if (IS_ERR(lnk->roce_pd))
465 		lnk->roce_pd = NULL;
481 			if (lgr->lnk[i].state == SMC_LNK_UNUSED ||
482 			    lgr->lnk[i].smcibdev != smcibdev)
636 	struct smc_link *lnk = (struct smc_link *)priv;
637 	struct smc_ib_device *smcibdev = lnk->smcibdev;
655 void smc_ib_destroy_queue_pair(struct smc_link *lnk)
657 	if (lnk->roce_qp)
658 		ib_destroy_qp(lnk->roce_qp);
659 	lnk->roce_qp = NULL;
663 int smc_ib_create_queue_pair(struct smc_link *lnk)
665 	int sges_per_buf = (lnk->lgr->smc_version == SMC_V2) ? 2 : 1;
668 		.qp_context = lnk,
669 		.send_cq = lnk->smcibdev->roce_cq_send,
670 		.recv_cq = lnk->smcibdev->roce_cq_recv,
687 	lnk->roce_qp = ib_create_qp(lnk->roce_pd, &qp_attr);
688 	rc = PTR_ERR_OR_ZERO(lnk->roce_qp);
689 	if (IS_ERR(lnk->roce_qp))
690 		lnk->roce_qp = NULL;
692 		smc_wr_remember_qp_attr(lnk);
739 bool smc_ib_is_sg_need_sync(struct smc_link *lnk,
747 	for_each_sg(buf_slot->sgt[lnk->link_idx].sgl, sg,
748 		    buf_slot->sgt[lnk->link_idx].nents, i) {
751 		if (dma_need_sync(lnk->smcibdev->ibdev->dma_device,
763 void smc_ib_sync_sg_for_cpu(struct smc_link *lnk,
770 	if (!(buf_slot->is_dma_need_sync & (1U << lnk->link_idx)))
774 	for_each_sg(buf_slot->sgt[lnk->link_idx].sgl, sg,
775 		    buf_slot->sgt[lnk->link_idx].nents, i) {
778 		ib_dma_sync_single_for_cpu(lnk->smcibdev->ibdev,
786 void smc_ib_sync_sg_for_device(struct smc_link *lnk,
793 	if (!(buf_slot->is_dma_need_sync & (1U << lnk->link_idx)))
797 	for_each_sg(buf_slot->sgt[lnk->link_idx].sgl, sg,
798 		    buf_slot->sgt[lnk->link_idx].nents, i) {
801 		ib_dma_sync_single_for_device(lnk->smcibdev->ibdev,
809 int smc_ib_buf_map_sg(struct smc_link *lnk,
815 	mapped_nents = ib_dma_map_sg(lnk->smcibdev->ibdev,
816 				     buf_slot->sgt[lnk->link_idx].sgl,
817 				     buf_slot->sgt[lnk->link_idx].orig_nents,
825 void smc_ib_buf_unmap_sg(struct smc_link *lnk,
829 	if (!buf_slot->sgt[lnk->link_idx].sgl->dma_address)
832 	ib_dma_unmap_sg(lnk->smcibdev->ibdev,
833 			buf_slot->sgt[lnk->link_idx].sgl,
834 			buf_slot->sgt[lnk->link_idx].orig_nents,
836 	buf_slot->sgt[lnk->link_idx].sgl->dma_address = 0;