Author: adrian
Date: Wed Oct 28 05:11:06 2015
New Revision: 290090
URL: https://svnweb.freebsd.org/changeset/base/290090
Log:
Add some debugging code (under ARGE_DEBUG) that counts each interrupt source.
This should make it easier to track down interrupt storms from arge.
Tested:
* AP135 (QCA955x) SoC - defaults to ARGE_DEBUG enabled
* Carambola2 (AR9331 SoC) - defaults to ARGE_DEBUG disabled
Modified:
head/sys/mips/atheros/if_arge.c
head/sys/mips/atheros/if_argevar.h
Modified: head/sys/mips/atheros/if_arge.c
==============================================================================
--- head/sys/mips/atheros/if_arge.c Wed Oct 28 03:43:24 2015
(r290089)
+++ head/sys/mips/atheros/if_arge.c Wed Oct 28 05:11:06 2015
(r290090)
@@ -277,6 +277,28 @@ arge_probe(device_t dev)
return (BUS_PROBE_NOWILDCARD);
}
+#ifdef ARGE_DEBUG
+static void
+arge_attach_intr_sysctl(device_t dev, struct sysctl_oid_list *parent)
+{
+ struct arge_softc *sc = device_get_softc(dev);
+ struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
+ struct sysctl_oid *tree = device_get_sysctl_tree(dev);
+ struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree);
+ char sn[8];
+ int i;
+
+ tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "intr",
+ CTLFLAG_RD, NULL, "Interrupt statistics");
+ child = SYSCTL_CHILDREN(tree);
+ for (i = 0; i < 32; i++) {
+ snprintf(sn, sizeof(sn), "%d", i);
+ SYSCTL_ADD_UINT(ctx, child, OID_AUTO, sn, CTLFLAG_RD,
+ &sc->intr_stats.count[i], 0, "");
+ }
+}
+#endif
+
static void
arge_attach_sysctl(device_t dev)
{
@@ -288,6 +310,7 @@ arge_attach_sysctl(device_t dev)
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"debug", CTLFLAG_RW, &sc->arge_debug, 0,
"arge interface debugging flags");
+ arge_attach_intr_sysctl(dev, SYSCTL_CHILDREN(tree));
#endif
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
@@ -2440,6 +2463,9 @@ arge_intr(void *arg)
struct arge_softc *sc = arg;
uint32_t status;
struct ifnet *ifp = sc->arge_ifp;
+#ifdef ARGE_DEBUG
+ int i;
+#endif
status = ARGE_READ(sc, AR71XX_DMA_INTR_STATUS);
status |= sc->arge_intr_status;
@@ -2456,6 +2482,14 @@ arge_intr(void *arg)
return;
}
+#ifdef ARGE_DEBUG
+ for (i = 0; i < 32; i++) {
+ if (status & (1 << i)) {
+ sc->intr_stats.count[1 << i]++;
+ }
+ }
+#endif
+
if (status & DMA_INTR_RX_BUS_ERROR) {
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_BUS_ERROR);
device_printf(sc->arge_dev, "RX bus error");
Modified: head/sys/mips/atheros/if_argevar.h
==============================================================================
--- head/sys/mips/atheros/if_argevar.h Wed Oct 28 03:43:24 2015
(r290089)
+++ head/sys/mips/atheros/if_argevar.h Wed Oct 28 05:11:06 2015
(r290090)
@@ -214,6 +214,9 @@ struct arge_softc {
uint32_t intr_stray2;
uint32_t intr_ok;
} stats;
+ struct {
+ uint32_t count[32];
+ } intr_stats;
};
#endif /* __IF_ARGEVAR_H__ */
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