netdev - [PATCH 2.6.25 9/12][BNX2X]: Prevent PCI queue overflow

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Message-ID: <1204115099.8232.364.camel@lb-tlvb-eliezer.il.broadcom.com>
Date:	Wed, 27 Feb 2008 14:24:59 +0200
From:	"Eliezer Tamir" <eliezert@...adcom.com>
To:	davem@...emloft.net, jeff@...zik.org,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 2.6.25 9/12][BNX2X]: Prevent PCI queue overflow

[BNX2X]: Prevent PCI queue overflow

Limit traffic through an internal queue to prevent overflow.

Signed-off-by: Eliezer Tamir <eliezert@...adcom.com>
---
 drivers/net/bnx2x_init.h |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bnx2x_init.h b/drivers/net/bnx2x_init.h
index 04f93bf..dcaecc5 100644
--- a/drivers/net/bnx2x_init.h
+++ b/drivers/net/bnx2x_init.h
@@ -1,6 +1,6 @@
 /* bnx2x_init.h: Broadcom Everest network driver.
  *
- * Copyright (c) 2007 Broadcom Corporation
+ * Copyright (c) 2007-2008 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -409,7 +409,7 @@ static void bnx2x_init_pxp(struct bnx2x *bp)
 
 	pci_read_config_word(bp->pdev,
 			     bp->pcie_cap + PCI_EXP_DEVCTL, (u16 *)&val);
-	DP(NETIF_MSG_HW, "read 0x%x from devctl\n", val);
+	DP(NETIF_MSG_HW, "read 0x%x from devctl\n", (u16)val);
 	w_order = ((val & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
 	r_order = ((val & PCI_EXP_DEVCTL_READRQ) >> 12);
 
@@ -472,10 +472,14 @@ static void bnx2x_init_pxp(struct bnx2x *bp)
 	REG_WR(bp, PXP2_REG_PSWRQ_BW_WR, val);
 
 	REG_WR(bp, PXP2_REG_RQ_WR_MBS0, w_order);
-	REG_WR(bp, PXP2_REG_RQ_WR_MBS0 + 8, w_order);
+	REG_WR(bp, PXP2_REG_RQ_WR_MBS1, w_order);
 	REG_WR(bp, PXP2_REG_RQ_RD_MBS0, r_order);
-	REG_WR(bp, PXP2_REG_RQ_RD_MBS0 + 8, r_order);
+	REG_WR(bp, PXP2_REG_RQ_RD_MBS1, r_order);
 
+	if (r_order == MAX_RD_ORD)
+		REG_WR(bp, PXP2_REG_RQ_PDR_LIMIT, 0xe00);
+
+	REG_WR(bp, PXP2_REG_WR_USDMDP_TH, (0x18 << w_order));
 	REG_WR(bp, PXP2_REG_WR_DMAE_TH, (128 << w_order)/16);
 }
 
-- 
1.5.3.2




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