Commit e8717a47 authored by Eliezer Tamir's avatar Eliezer Tamir Committed by David S. Miller
Browse files

[BNX2X]: Prevent PCI queue overflow 



Limit traffic through an internal queue to prevent overflow.

Signed-off-by: default avatarEliezer Tamir <eliezert@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 228241eb

drivers/net/bnx2x_init.h

+8 −4
Original line number Diff line number Diff line 
/* 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);

}