IB/hfi1: Add functions to receive TID RDMA WRITE request

This patch adds the functions to receive TID RDMA WRITE request. The
request will be stored in the QP's s_ack_queue. This patch also adds
code to handle duplicate TID RDMA WRITE request and a function to
allocate TID resources for data receiving on the responder side.

Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/init.c

@@ -1512,6 +1512,7 @@ static int __init hfi1_mod_init(void)
 		goto bail_dev;
 	}
 
+	hfi1_compute_tid_rdma_flow_wt();
 	/*
 	 * These must be called before the driver is registered with
 	 * the PCI subsystem.

drivers/infiniband/hw/hfi1/rc.c

@@ -2411,6 +2411,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 	void *data = packet->payload;
 	u32 tlen = packet->tlen;
 	struct rvt_qp *qp = packet->qp;
+	struct hfi1_qp_priv *qpriv = qp->priv;
 	struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 	struct ib_other_headers *ohdr = packet->ohdr;
 	u32 opcode = packet->opcode;
@@ -2716,6 +2717,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 		qp->r_state = opcode;
 		qp->r_nak_state = 0;
 		qp->r_head_ack_queue = next;
+		qpriv->r_tid_alloc = qp->r_head_ack_queue;
 
 		/* Schedule the send engine. */
 		qp->s_flags |= RVT_S_RESP_PENDING;
@@ -2789,6 +2791,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 		qp->r_state = opcode;
 		qp->r_nak_state = 0;
 		qp->r_head_ack_queue = next;
+		qpriv->r_tid_alloc = qp->r_head_ack_queue;
 
 		/* Schedule the send engine. */
 		qp->s_flags |= RVT_S_RESP_PENDING;