3 files changed, 12 insertions, 0 deletions

diff --git a/sys/dev/cxgbe/adapter.h b/sys/dev/cxgbe/adapter.h
index 806f1faea0a3..e8eeb3333ac0 100644
--- a/sys/dev/cxgbe/adapter.h
+++ b/sys/dev/cxgbe/adapter.h
@@ -895,6 +895,8 @@ struct adapter {
 	const char *last_op;
 	const void *last_op_thr;
 	int last_op_flags;
+
+	int swintr;
 };
 
 #define ADAPTER_LOCK(sc)		mtx_lock(&(sc)->sc_lock)
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index e3c0c5fe2755..99c287a689ee 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -6031,6 +6031,9 @@ t4_sysctls(struct adapter *sc)
 	    CTLTYPE_STRING | CTLFLAG_RD, sc, INTR_CPUS,
 	    sysctl_cpus, "A", "preferred CPUs for interrupts");
 
+	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "swintr", CTLFLAG_RW,
+	    &sc->swintr, 0, "software triggered interrupts");
+
 	/*
 	 * 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 df7e3f43a8b9..f69d0b4b9a06 100644
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -1394,11 +1394,18 @@ void
 t4_intr_err(void *arg)
 {
 	struct adapter *sc = arg;
+	uint32_t v;
 	const bool verbose = (sc->debug_flags & DF_VERBOSE_SLOWINTR) != 0;
 
 	if (sc->flags & ADAP_ERR)
 		return;
 
+	v = t4_read_reg(sc, MYPF_REG(A_PL_PF_INT_CAUSE));
+	if (v & F_PFSW) {
+		sc->swintr++;
+		t4_write_reg(sc, MYPF_REG(A_PL_PF_INT_CAUSE), v);
+	}
+
 	t4_slow_intr_handler(sc, verbose);
 }