From a52be00b7f7e336eb3883b40cdc6cf73571f0c4e Mon Sep 17 00:00:00 2001
From: np <np@FreeBSD.org>
Date: Thu, 29 Aug 2013 06:26:22 +0000
Subject: Merge r254386 from user/np/cxl_tuning.  Add an INET|INET6 check
 missing in said revision.

r254386:
Flush inactive LRO entries periodically.
---
 sys/dev/cxgbe/adapter.h |  1 +
 sys/dev/cxgbe/t4_main.c |  4 ++++
 sys/dev/cxgbe/t4_sge.c  | 12 ++++++++++++
 3 files changed, 17 insertions(+)

diff --git a/sys/dev/cxgbe/adapter.h b/sys/dev/cxgbe/adapter.h
index f121ec8..ba956c4 100644
--- a/sys/dev/cxgbe/adapter.h
+++ b/sys/dev/cxgbe/adapter.h
@@ -559,6 +559,7 @@ struct adapter {
 	bus_dma_tag_t dmat;	/* Parent DMA tag */
 
 	struct sge sge;
+	int lro_timeout;
 
 	struct taskqueue *tq[NCHAN];	/* taskqueues that flush data out */
 	struct port_info *port[MAX_NPORTS];
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index f2d1986..d905cd5 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -4229,6 +4229,10 @@ t4_sysctls(struct adapter *sc)
 
 	t4_sge_sysctls(sc, ctx, children);
 
+	sc->lro_timeout = 100;
+	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "lro_timeout", CTLFLAG_RW,
+	    &sc->lro_timeout, 0, "lro inactive-flush timeout (in us)");
+
 #ifdef SBUF_DRAIN
 	/*
 	 * dev.t4nex.X.misc.  Marked CTLFLAG_SKIP to avoid information overload.
diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c
index c5aeff9..34bd27a 100644
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/malloc.h>
 #include <sys/queue.h>
 #include <sys/taskqueue.h>
+#include <sys/time.h>
 #include <sys/sysctl.h>
 #include <sys/smp.h>
 #include <net/bpf.h>
@@ -1006,6 +1007,9 @@ service_iq(struct sge_iq *iq, int budget)
 	uint32_t lq;
 	struct mbuf *m0;
 	STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql);
+#if defined(INET) || defined(INET6)
+	const struct timeval lro_timeout = {0, sc->lro_timeout};
+#endif
 
 	limit = budget ? budget : iq->qsize / 8;
 
@@ -1111,6 +1115,14 @@ service_iq(struct sge_iq *iq, int budget)
 				    V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
 				ndescs = 0;
 
+#if defined(INET) || defined(INET6)
+				if (iq->flags & IQ_LRO_ENABLED &&
+				    sc->lro_timeout != 0) {
+					tcp_lro_flush_inactive(&rxq->lro,
+					    &lro_timeout);
+				}
+#endif
+
 				if (fl_bufs_used > 0) {
 					FL_LOCK(fl);
 					fl->needed += fl_bufs_used;
-- 
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