Author: np
Date: Thu Aug 31 20:33:22 2017
New Revision: 323069
URL: https://svnweb.freebsd.org/changeset/base/323069
Log:
cxgbe/t4_tom: Add a knob to select the congestion control algorigthm
used by the TOE hardware for fully offloaded connections. The knob
affects new connections only.
MFC after: 2 weeks
Sponsored by: Chelsio Communications
Modified:
head/sys/dev/cxgbe/offload.h
head/sys/dev/cxgbe/t4_main.c
head/sys/dev/cxgbe/tom/t4_connect.c
head/sys/dev/cxgbe/tom/t4_listen.c
Modified: head/sys/dev/cxgbe/offload.h
==============================================================================
--- head/sys/dev/cxgbe/offload.h Thu Aug 31 20:16:28 2017
(r323068)
+++ head/sys/dev/cxgbe/offload.h Thu Aug 31 20:33:22 2017
(r323069)
@@ -144,6 +144,7 @@ struct uld_info {
};
struct tom_tunables {
+ int cong_algorithm;
int sndbuf;
int ddp;
int rx_coalesce;
Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c Thu Aug 31 20:16:28 2017
(r323068)
+++ head/sys/dev/cxgbe/t4_main.c Thu Aug 31 20:33:22 2017
(r323069)
@@ -5416,6 +5416,12 @@ t4_sysctls(struct adapter *sc)
NULL, "TOE parameters");
children = SYSCTL_CHILDREN(oid);
+ sc->tt.cong_algorithm = -1;
+ SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_algorithm",
+ CTLFLAG_RW, &sc->tt.cong_algorithm, 0, "congestion control "
+ "(-1 = default, 0 = reno, 1 = tahoe, 2 = newreno, "
+ "3 = highspeed)");
+
sc->tt.sndbuf = 256 * 1024;
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "sndbuf", CTLFLAG_RW,
&sc->tt.sndbuf, 0, "max hardware send buffer size");
Modified: head/sys/dev/cxgbe/tom/t4_connect.c
==============================================================================
--- head/sys/dev/cxgbe/tom/t4_connect.c Thu Aug 31 20:16:28 2017
(r323068)
+++ head/sys/dev/cxgbe/tom/t4_connect.c Thu Aug 31 20:33:22 2017
(r323069)
@@ -259,6 +259,9 @@ calc_opt2a(struct socket *so, struct toepcb *toep)
if (sc->tt.rx_coalesce)
opt2 |= V_RX_COALESCE(M_RX_COALESCE);
+ if (sc->tt.cong_algorithm != -1)
+ opt2 |= V_CONG_CNTRL(sc->tt.cong_algorithm & M_CONG_CNTRL);
+
#ifdef USE_DDP_RX_FLOW_CONTROL
if (toep->ulp_mode == ULP_MODE_TCPDDP)
opt2 |= F_RX_FC_VALID | F_RX_FC_DDP;
Modified: head/sys/dev/cxgbe/tom/t4_listen.c
==============================================================================
--- head/sys/dev/cxgbe/tom/t4_listen.c Thu Aug 31 20:16:28 2017
(r323068)
+++ head/sys/dev/cxgbe/tom/t4_listen.c Thu Aug 31 20:33:22 2017
(r323069)
@@ -1047,6 +1047,9 @@ calc_opt2p(struct adapter *sc, struct port_info *pi, i
if (sc->tt.rx_coalesce)
opt2 |= V_RX_COALESCE(M_RX_COALESCE);
+ if (sc->tt.cong_algorithm != -1)
+ opt2 |= V_CONG_CNTRL(sc->tt.cong_algorithm & M_CONG_CNTRL);
+
#ifdef USE_DDP_RX_FLOW_CONTROL
if (ulp_mode == ULP_MODE_TCPDDP)
opt2 |= F_RX_FC_VALID | F_RX_FC_DDP;
_______________________________________________
svn-src-head@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
