netdev - [PATCH 3/13] cxgb3 - SGE doorbell overflow warning

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Message-ID: <20070811062944.8058.38057.stgit@speedy5>
Date:	Fri, 10 Aug 2007 23:29:44 -0700
From:	Divy Le Ray <divy@...lsio.com>
To:	jeff@...zik.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	swise@...ngridcomputing.com
Subject: [PATCH 3/13] cxgb3 - SGE doorbell overflow warning

From: Divy Le Ray <divy@...lsio.com>

Log doorbell Fifo overflow

Signed-off-by: Divy Le Ray <divy@...lsio.com>
---

 drivers/net/cxgb3/regs.h |    8 ++++++++
 drivers/net/cxgb3/sge.c  |    4 ++++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/net/cxgb3/regs.h b/drivers/net/cxgb3/regs.h
index aa80313..2824278 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 a2cfd68..9213cda 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -2476,6 +2476,10 @@ 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);
-
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