cxgb3 - SGE doorbell overflow warning

Log doorbell Fifo overflow

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/cxgb3/regs.h b/drivers/net/cxgb3/regs.h
index aa80313c922e..282427877ea9 100644
--- a/drivers/net/cxgb3/regs.h
+++ b/drivers/net/cxgb3/regs.h
@@ -172,6 +172,14 @@
 
 #define A_SG_INT_CAUSE 0x5c
 
+#define S_HIPIODRBDROPERR    11
+#define V_HIPIODRBDROPERR(x) ((x) << S_HIPIODRBDROPERR)
+#define F_HIPIODRBDROPERR    V_HIPIODRBDROPERR(1U)
+
+#define S_LOPIODRBDROPERR    10
+#define V_LOPIODRBDROPERR(x) ((x) << S_LOPIODRBDROPERR)
+#define F_LOPIODRBDROPERR    V_LOPIODRBDROPERR(1U)
+
 #define S_RSPQDISABLED    3
 #define V_RSPQDISABLED(x) ((x) << S_RSPQDISABLED)
 #define F_RSPQDISABLED    V_RSPQDISABLED(1U)
diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 069c1aca8a6b..9233bbba9e91 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -2458,6 +2458,10 @@ void t3_sge_err_intr_handler(struct adapter *adapter)
                          "(0x%x)\n", (v >> S_RSPQ0DISABLED) & 0xff);
         }
 
+        if (status & (F_HIPIODRBDROPERR | F_LOPIODRBDROPERR))
+                CH_ALERT(adapter, "SGE dropped %s priority doorbell\n",
+                         status & F_HIPIODRBDROPERR ? "high" : "lo");
+
         t3_write_reg(adapter, A_SG_INT_CAUSE, status);
         if (status & (F_RSPQCREDITOVERFOW | F_RSPQDISABLED))
                 t3_fatal_err(adapter);