hw/hfi1/rc.c

57  * make_rc_ack - construct a response packet (ACK, NAK, or RDMA read)
61  * @ps: the xmit packet state
264 		 *    5.2 Build TID RDMA WRITE RESP packet
380  * hfi1_make_rc_req - construct a request packet (SEND, RDMA r/w, ATOMIC)
382  * @ps: the current packet state
899 		 * last packet constructed for new requests and therefore
944 		 * last packet constructed for new requests and therefore
984 		 * last packet constructed for new requests and therefore
1196 static inline void hfi1_queue_rc_ack(struct hfi1_packet *packet, bool is_fecn)
1198 	struct rvt_qp *qp = packet->qp;
1205 	ibp = rcd_to_iport(packet->rcd);
1219 static inline void hfi1_make_rc_ack_9B(struct hfi1_packet *packet,
1225 	struct rvt_qp *qp = packet->qp;
1226 	struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1272 static inline void hfi1_make_rc_ack_16B(struct hfi1_packet *packet,
1278 	struct rvt_qp *qp = packet->qp;
1279 	struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1325 typedef void (*hfi1_make_rc_ack)(struct hfi1_packet *packet,
1338  * hfi1_send_rc_ack - Construct an ACK packet and send it
1344 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn)
1346 	struct hfi1_ctxtdata *rcd = packet->rcd;
1347 	struct rvt_qp *qp = packet->qp;
1364 		hfi1_queue_rc_ack(packet, is_fecn);
1370 		hfi1_queue_rc_ack(packet, is_fecn);
1379 	hfi1_make_rc_ack_tbl[priv->hdr_type](packet, &opa_hdr, sc5, is_fecn,
1393 		hfi1_queue_rc_ack(packet, is_fecn);
1410  * @psn: the packet sequence number to restart at
1452  * @psn: the packet sequence number to restart at
1669  * send a single packet in the likely case the
1754 	 * Start timer after a packet requesting an ACK has been sent and
1777 		 * The TID RDMA ACK packet could be received before this
1922  * @psn: the packet sequence number of the TID RDMA WRITE RESP.
1937 	 * If this is the first TID RDMA WRITE RESP packet for the current
1940 	 * packet, change the s_state and advance the s_cur.
1956  * @psn: the packet sequence number of the ACK
2059 		 * ACK packet handler (see tid_rdma.c).
2129 				 * and continue with the next packet the
2152 		 * response is not a TID RDMA WRITE RESP packet, s_last_psn
2260  * We have seen an out of sequence RDMA read middle or last packet.
2295  * rc_rcv_resp - process an incoming RC response packet
2296  * @packet: data packet information
2299  * packet for the given QP.
2302 static void rc_rcv_resp(struct hfi1_packet *packet)
2304 	struct hfi1_ctxtdata *rcd = packet->rcd;
2305 	void *data = packet->payload;
2306 	u32 tlen = packet->tlen;
2307 	struct rvt_qp *qp = packet->qp;
2309 	struct ib_other_headers *ohdr = packet->ohdr;
2316 	u32 psn = ib_bth_get_psn(packet->ohdr);
2318 	u16 hdrsize = packet->hlen;
2319 	u8 opcode = packet->opcode;
2320 	u8 pad = packet->pad;
2321 	u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
2495  * rc_rcv_error - process an incoming duplicate or error RC packet
2496  * @ohdr: the other headers for this packet
2497  * @data: the packet data
2498  * @qp: the QP for this packet
2499  * @opcode: the opcode for this packet
2500  * @psn: the packet sequence number for this packet
2505  * incoming RC packet for the given QP.
2756  * hfi1_rc_rcv - process an incoming RC packet
2757  * @packet: data packet information
2759  * This is called from qp_rcv() to process an incoming RC packet
2763 void hfi1_rc_rcv(struct hfi1_packet *packet)
2765 	struct hfi1_ctxtdata *rcd = packet->rcd;
2766 	void *data = packet->payload;
2767 	u32 tlen = packet->tlen;
2768 	struct rvt_qp *qp = packet->qp;
2771 	struct ib_other_headers *ohdr = packet->ohdr;
2772 	u32 opcode = packet->opcode;
2773 	u32 hdrsize = packet->hlen;
2774 	u32 psn = ib_bth_get_psn(packet->ohdr);
2775 	u32 pad = packet->pad;
2784 	u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
2788 	if (hfi1_ruc_check_hdr(ibp, packet))
2791 	fecn = process_ecn(qp, packet);
2796 	 * packet sequence number will be for something in the send work
2797 	 * queue rather than the expected receive packet sequence number.
2802 		rc_rcv_resp(packet);
2853 	/* OK, process the packet. */
2868 		 * There will be no padding for 9B packet but 16B packets
3164 		if (packet->numpkt == 0 || fecn ||
3206 	hfi1_send_rc_ack(packet, fecn);
3211 	struct hfi1_packet *packet,
3219 	if (hfi1_ruc_check_hdr(ibp, packet))
3222 	psn = ib_bth_get_psn(packet->ohdr);
3223 	opcode = ib_bth_get_opcode(packet->ohdr);