cxgb4vf: Implement "Unhandled Interrupts" statistic

Implement "Unhandled Interrupts" statistic so we can detect when the
hardware tells us that it things we have work to do but we don't find
anything ...

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/cxgb4vf/cxgb4vf_main.c b/drivers/net/cxgb4vf/cxgb4vf_main.c
index bd73ff5b51b7402a53a6615b87c2ffc56fd4bd84..e988031f7e8645fbe60e8f123d115e9e920e45bb 100644 (file)
--- a/drivers/net/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/cxgb4vf/cxgb4vf_main.c
@@ -1790,7 +1790,7 @@ static int sge_qstats_show(struct seq_file *seq, void *v)
                  (rxq[qs].rspq.netdev
                   ? rxq[qs].rspq.netdev->name
                   : "N/A"));
-               R3("u", "RspQNullInts", rspq.unhandled_irqs);
+               R3("u", "RspQNullInts:", rspq.unhandled_irqs);
                R("RxPackets:", stats.pkts);
                R("RxCSO:", stats.rx_cso);
                R("VLANxtract:", stats.vlan_ex);
@@ -1814,14 +1814,16 @@ static int sge_qstats_show(struct seq_file *seq, void *v)
                const struct sge_rspq *evtq = &adapter->sge.fw_evtq;
 
                seq_printf(seq, "%-8s %16s\n", "QType:", "FW event queue");
-               /* no real response queue statistics available to display */
+               seq_printf(seq, "%-16s %8u\n", "RspQNullInts:",
+                          evtq->unhandled_irqs);
                seq_printf(seq, "%-16s %8u\n", "RspQ CIdx:", evtq->cidx);
                seq_printf(seq, "%-16s %8u\n", "RspQ Gen:", evtq->gen);
        } else if (r == 1) {
                const struct sge_rspq *intrq = &adapter->sge.intrq;
 
                seq_printf(seq, "%-8s %16s\n", "QType:", "Interrupt Queue");
-               /* no real response queue statistics available to display */
+               seq_printf(seq, "%-16s %8u\n", "RspQNullInts:",
+                          intrq->unhandled_irqs);
                seq_printf(seq, "%-16s %8u\n", "RspQ CIdx:", intrq->cidx);
                seq_printf(seq, "%-16s %8u\n", "RspQ Gen:", intrq->gen);
        }

diff --git a/drivers/net/cxgb4vf/sge.c b/drivers/net/cxgb4vf/sge.c
index 4bc1858dc3032af4d8836eea617f2f10c7638b3c..37c6354547c7eca2eff8387f4ab7f1bc0771c0a8 100644 (file)
--- a/drivers/net/cxgb4vf/sge.c
+++ b/drivers/net/cxgb4vf/sge.c
@@ -1772,6 +1772,9 @@ static int napi_rx_handler(struct napi_struct *napi, int budget)
        } else
                intr_params = QINTR_TIMER_IDX(SGE_TIMER_UPD_CIDX);
 
+       if (unlikely(work_done == 0))
+               rspq->unhandled_irqs++;
+
        t4_write_reg(rspq->adapter,
                     T4VF_SGE_BASE_ADDR + SGE_VF_GTS,
                     CIDXINC(work_done) |