Author: np
Date: Thu Mar 28 21:22:28 2019
New Revision: 345660
URL: https://svnweb.freebsd.org/changeset/base/345660
Log:
cxgbe(4): Count and clear interrupts generated at the software's request.
An interrupt can be requested by setting the F_SWINT bit in PL_PF_CTL.
MFC after: 1 week
Sponsored by: Chelsio Communications
Modified:
head/sys/dev/cxgbe/adapter.h
head/sys/dev/cxgbe/t4_main.c
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/adapter.h
==============================================================================
--- head/sys/dev/cxgbe/adapter.h Thu Mar 28 21:00:54 2019
(r345659)
+++ head/sys/dev/cxgbe/adapter.h Thu Mar 28 21:22:28 2019
(r345660)
@@ -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)
Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c Thu Mar 28 21:00:54 2019
(r345659)
+++ head/sys/dev/cxgbe/t4_main.c Thu Mar 28 21:22:28 2019
(r345660)
@@ -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.
*/
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Thu Mar 28 21:00:54 2019 (r345659)
+++ head/sys/dev/cxgbe/t4_sge.c Thu Mar 28 21:22:28 2019 (r345660)
@@ -1394,10 +1394,17 @@ 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);
}
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