IB/hfi1: Add a function to build TID RDMA WRITE DATA packet (539e1908) · Commits · 戴 / test

drivers/infiniband/hw/hfi1/tid_rdma.c

+62 −0

Original line number	Diff line number	Diff line
		@@ -3943,3 +3943,65 @@ ack_done:
		if (is_fecn)
		hfi1_send_rc_ack(packet, is_fecn);
		}

		bool hfi1_build_tid_rdma_packet(struct rvt_swqe *wqe,
		struct ib_other_headers *ohdr,
		u32 bth1, u32 bth2, u32 *len)
		{
		struct tid_rdma_request *req = wqe_to_tid_req(wqe);
		struct tid_rdma_flow *flow = &req->flows[req->clear_tail];
		struct tid_rdma_params *remote;
		struct rvt_qp *qp = req->qp;
		struct hfi1_qp_priv *qpriv = qp->priv;
		u32 tidentry = flow->tid_entry[flow->tid_idx];
		u32 tidlen = EXP_TID_GET(tidentry, LEN) << PAGE_SHIFT;
		struct tid_rdma_write_data *wd = &ohdr->u.tid_rdma.w_data;
		u32 next_offset, om = KDETH_OM_LARGE;
		bool last_pkt;

		if (!tidlen) {
		hfi1_trdma_send_complete(qp, wqe, IB_WC_REM_INV_RD_REQ_ERR);
		rvt_error_qp(qp, IB_WC_REM_INV_RD_REQ_ERR);
		}

		*len = min_t(u32, qp->pmtu, tidlen - flow->tid_offset);
		flow->sent += *len;
		next_offset = flow->tid_offset + *len;
		last_pkt = (flow->tid_idx == (flow->tidcnt - 1) &&
		next_offset >= tidlen) \|\| (flow->sent >= flow->length);

		rcu_read_lock();
		remote = rcu_dereference(qpriv->tid_rdma.remote);
		KDETH_RESET(wd->kdeth0, KVER, 0x1);
		KDETH_SET(wd->kdeth0, SH, !last_pkt);
		KDETH_SET(wd->kdeth0, INTR, !!(!last_pkt && remote->urg));
		KDETH_SET(wd->kdeth0, TIDCTRL, EXP_TID_GET(tidentry, CTRL));
		KDETH_SET(wd->kdeth0, TID, EXP_TID_GET(tidentry, IDX));
		KDETH_SET(wd->kdeth0, OM, om == KDETH_OM_LARGE);
		KDETH_SET(wd->kdeth0, OFFSET, flow->tid_offset / om);
		KDETH_RESET(wd->kdeth1, JKEY, remote->jkey);
		wd->verbs_qp = cpu_to_be32(qp->remote_qpn);
		rcu_read_unlock();

		*bth1 = flow->tid_qpn;
		*bth2 = mask_psn(((flow->flow_state.spsn + flow->pkt++) &
		HFI1_KDETH_BTH_SEQ_MASK) \|
		(flow->flow_state.generation <<
		HFI1_KDETH_BTH_SEQ_SHIFT));
		if (last_pkt) {
		/* PSNs are zero-based, so +1 to count number of packets */
		if (flow->flow_state.lpsn + 1 +
		rvt_div_round_up_mtu(qp, req->seg_len) >
		MAX_TID_FLOW_PSN)
		req->state = TID_REQUEST_SYNC;
		*bth2 \|= IB_BTH_REQ_ACK;
		}

		if (next_offset >= tidlen) {
		flow->tid_offset = 0;
		flow->tid_idx++;
		} else {
		flow->tid_offset = next_offset;
		}
		return last_pkt;
		}

drivers/infiniband/hw/hfi1/tid_rdma.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -275,4 +275,8 @@ void hfi1_del_tid_reap_timer(struct rvt_qp *qp);

		void hfi1_rc_rcv_tid_rdma_write_resp(struct hfi1_packet *packet);

		bool hfi1_build_tid_rdma_packet(struct rvt_swqe *wqe,
		struct ib_other_headers *ohdr,
		u32 bth1, u32 bth2, u32 *len);

		#endif /* HFI1_TID_RDMA_H */

Admin message