The T5 allows the driver to specify the ISS. Do so; use the ISS picked

by the kernel.

MFC after:	1 day

3 files changed, 34 insertions, 8 deletions

diff --git a/sys/dev/cxgbe/common/t4_msg.h b/sys/dev/cxgbe/common/t4_msg.h
index 5988070..ef8fbe6 100644
--- a/sys/dev/cxgbe/common/t4_msg.h
+++ b/sys/dev/cxgbe/common/t4_msg.h
@@ -678,6 +678,15 @@ struct cpl_pass_accept_rpl {
 	__be64 opt0;
 };
 
+struct cpl_t5_pass_accept_rpl {
+	WR_HDR;
+	union opcode_tid ot;
+	__be32 opt2;
+	__be64 opt0;
+	__be32 iss;
+	__be32 rsvd;
+};
+
 struct cpl_act_open_req {
 	WR_HDR;
 	union opcode_tid ot;
@@ -702,7 +711,7 @@ struct cpl_t5_act_open_req {
 	__be32 local_ip;
 	__be32 peer_ip;
 	__be64 opt0;
-	__be32 rsvd;
+	__be32 iss;
 	__be32 opt2;
 	__be64 params;
 };
@@ -731,7 +740,7 @@ struct cpl_t5_act_open_req6 {
 	__be64 peer_ip_hi;
 	__be64 peer_ip_lo;
 	__be64 opt0;
-	__be32 rsvd;
+	__be32 iss;
 	__be32 opt2;
 	__be64 params;
 };
diff --git a/sys/dev/cxgbe/tom/t4_connect.c b/sys/dev/cxgbe/tom/t4_connect.c
index 69dca96..11cb4fc 100644
--- a/sys/dev/cxgbe/tom/t4_connect.c
+++ b/sys/dev/cxgbe/tom/t4_connect.c
@@ -247,8 +247,10 @@ calc_opt2a(struct socket *so, struct toepcb *toep)
 	/* RX_COALESCE is always a valid value (M_RX_COALESCE). */
 	if (is_t4(sc))
 		opt2 |= F_RX_COALESCE_VALID;
-	else
+	else {
 		opt2 |= F_T5_OPT_2_VALID;
+		opt2 |= F_CONG_CNTRL_VALID; /* OPT_2_ISS really, for T5 */
+	}
 	opt2 |= V_RX_COALESCE(M_RX_COALESCE);
 
 #ifdef USE_DDP_RX_FLOW_CONTROL
@@ -392,7 +394,7 @@ t4_connect(struct toedev *tod, struct socket *so, struct rtentry *rt,
 			struct cpl_t5_act_open_req6 *c5 = (void *)cpl;
 
 			INIT_TP_WR(c5, 0);
-			c5->rsvd = 0;
+			c5->iss = htobe32(tp->iss);
 			c5->params = select_ntuple(pi, toep->l2te);
 		}
 		OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
@@ -416,7 +418,7 @@ t4_connect(struct toedev *tod, struct socket *so, struct rtentry *rt,
 			struct cpl_t5_act_open_req *c5 = (void *)cpl;
 
 			INIT_TP_WR(c5, 0);
-			c5->rsvd = 0;
+			c5->iss = htobe32(tp->iss);
 			c5->params = select_ntuple(pi, toep->l2te);
 		}
 		OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
diff --git a/sys/dev/cxgbe/tom/t4_listen.c b/sys/dev/cxgbe/tom/t4_listen.c
index 7db4126..7259a29 100644
--- a/sys/dev/cxgbe/tom/t4_listen.c
+++ b/sys/dev/cxgbe/tom/t4_listen.c
@@ -674,6 +674,12 @@ t4_syncache_respond(struct toedev *tod, void *arg, struct mbuf *m)
 	synqe->iss = be32toh(th->th_seq);
 	synqe->ts = to.to_tsval;
 
+	if (is_t5(sc)) {
+		struct cpl_t5_pass_accept_rpl *rpl5 = wrtod(wr);
+
+		rpl5->iss = th->th_seq;
+	}
+
 	e = &sc->l2t->l2tab[synqe->l2e_idx];
 	t4_l2t_send(sc, wr, e);
 
@@ -1011,8 +1017,10 @@ calc_opt2p(struct adapter *sc, struct port_info *pi, int rxqid,
 	/* RX_COALESCE is always a valid value (0 or M_RX_COALESCE). */
 	if (is_t4(sc))
 		opt2 |= F_RX_COALESCE_VALID;
-	else
+	else {
 		opt2 |= F_T5_OPT_2_VALID;
+		opt2 |= F_CONG_CNTRL_VALID; /* OPT_2_ISS really, for T5 */
+	}
 	opt2 |= V_RX_COALESCE(M_RX_COALESCE);
 
 #ifdef USE_DDP_RX_FLOW_CONTROL
@@ -1287,7 +1295,8 @@ do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss,
 	if (synqe == NULL)
 		REJECT_PASS_ACCEPT();
 
-	wr = alloc_wrqe(sizeof(*rpl), &sc->sge.ctrlq[pi->port_id]);
+	wr = alloc_wrqe(is_t4(sc) ? sizeof(struct cpl_pass_accept_rpl) :
+	    sizeof(struct cpl_t5_pass_accept_rpl), &sc->sge.ctrlq[pi->port_id]);
 	if (wr == NULL)
 		REJECT_PASS_ACCEPT();
 	rpl = wrtod(wr);
@@ -1328,7 +1337,13 @@ do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss,
 	save_qids_in_mbuf(m, pi);
 	get_qids_from_mbuf(m, NULL, &rxqid);
 
-	INIT_TP_WR_MIT_CPL(rpl, CPL_PASS_ACCEPT_RPL, tid);
+	if (is_t4(sc))
+		INIT_TP_WR_MIT_CPL(rpl, CPL_PASS_ACCEPT_RPL, tid);
+	else {
+		struct cpl_t5_pass_accept_rpl *rpl5 = (void *)rpl;
+
+		INIT_TP_WR_MIT_CPL(rpl5, CPL_PASS_ACCEPT_RPL, tid);
+	}
 	if (sc->tt.ddp && (so->so_options & SO_NO_DDP) == 0) {
 		ulp_mode = ULP_MODE_TCPDDP;
 		synqe->flags |= TPF_SYNQE_TCPDDP;