drivers/infiniband/core/uverbs_std_types_qp.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/core/uverbs_std_types_qp.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/core/uverbs_std_types_qp.c
Extension
.c
Size
11050 bytes
Lines
386
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!IS_ERR(rwq_ind_tbl)) {
			if (cap.max_recv_wr || cap.max_recv_sge ||
			    uverbs_attr_is_valid(attrs,
				UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE) ||
			    uverbs_attr_is_valid(attrs,
					UVERBS_ATTR_CREATE_QP_SRQ_HANDLE))
				return -EINVAL;

			/* send_cq is optional */
			if (cap.max_send_wr) {
				send_cq = uverbs_attr_get_obj(attrs,
					UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE);
				if (IS_ERR(send_cq))
					return PTR_ERR(send_cq);
			}
			attr.rwq_ind_tbl = rwq_ind_tbl;
		} else {
			send_cq = uverbs_attr_get_obj(attrs,
					UVERBS_ATTR_CREATE_QP_SEND_CQ_HANDLE);
			if (IS_ERR(send_cq))
				return PTR_ERR(send_cq);

			if (attr.qp_type != IB_QPT_XRC_INI) {
				recv_cq = uverbs_attr_get_obj(attrs,
					UVERBS_ATTR_CREATE_QP_RECV_CQ_HANDLE);
				if (IS_ERR(recv_cq))
					return PTR_ERR(recv_cq);
			}
		}

		device = pd->device;
		break;
	default:
		return -EINVAL;
	}

	ret = uverbs_get_flags32(&attr.create_flags, attrs,
			 UVERBS_ATTR_CREATE_QP_FLAGS,
			 IB_UVERBS_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
			 IB_UVERBS_QP_CREATE_SCATTER_FCS |
			 IB_UVERBS_QP_CREATE_CVLAN_STRIPPING |
			 IB_UVERBS_QP_CREATE_PCI_WRITE_END_PADDING |
			 IB_UVERBS_QP_CREATE_SQ_SIG_ALL);
	if (ret)
		return ret;

	ret = check_creation_flags(attr.qp_type, attr.create_flags);
	if (ret)
		return ret;

	if (uverbs_attr_is_valid(attrs,
			UVERBS_ATTR_CREATE_QP_SOURCE_QPN)) {
		ret = uverbs_copy_from(&attr.source_qpn, attrs,
				       UVERBS_ATTR_CREATE_QP_SOURCE_QPN);
		if (ret)
			return ret;
		attr.create_flags |= IB_QP_CREATE_SOURCE_QPN;
	}

	srq = uverbs_attr_get_obj(attrs,
				  UVERBS_ATTR_CREATE_QP_SRQ_HANDLE);
	if (!IS_ERR(srq)) {
		if ((srq->srq_type == IB_SRQT_XRC &&
			attr.qp_type != IB_QPT_XRC_TGT) ||
		    (srq->srq_type != IB_SRQT_XRC &&
			attr.qp_type == IB_QPT_XRC_TGT))
			return -EINVAL;
		attr.srq = srq;
	}

	obj->uevent.event_file = ib_uverbs_get_async_event(attrs,
					UVERBS_ATTR_CREATE_QP_EVENT_FD);
	INIT_LIST_HEAD(&obj->uevent.event_list);
	INIT_LIST_HEAD(&obj->mcast_list);
	obj->uevent.uobject.user_handle = user_handle;
	attr.event_handler = ib_uverbs_qp_event_handler;
	attr.send_cq = send_cq;
	attr.recv_cq = recv_cq;
	attr.xrcd = xrcd;
	if (attr.create_flags & IB_UVERBS_QP_CREATE_SQ_SIG_ALL) {
		/* This creation bit is uverbs one, need to mask before
		 * calling drivers. It was added to prevent an extra user attr
		 * only for that when using ioctl.
		 */
		attr.create_flags &= ~IB_UVERBS_QP_CREATE_SQ_SIG_ALL;
		attr.sq_sig_type = IB_SIGNAL_ALL_WR;
	} else {
		attr.sq_sig_type = IB_SIGNAL_REQ_WR;
	}

Annotation

Implementation Notes