Commit 7bd54c86 authored by Linas Vepstas's avatar Linas Vepstas Committed by Jeff Garzik
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[PATCH] spidernet: poor network performance 



Correct a problem seen on later kernels running the NetPIPE application.
Specifically, NetPIPE would begin running very slowly at the 1533 packet
size.  It was determined that Spidernet slowed with an idle DMA engine.

Signed-off-by: default avatarJames K Lewis <jklewis@us.ibm.com>
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 9c434f5e

drivers/net/spider_net.c

+1 −1
Original line number Diff line number Diff line
@@ -1633,7 +1633,7 @@ spider_net_enable_card(struct spider_net_card *card) 
			     SPIDER_NET_INT2_MASK_VALUE);



	spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,

			     SPIDER_NET_GDTBSTA | SPIDER_NET_GDTDCEIDIS);

			     SPIDER_NET_GDTBSTA);

}



/**

drivers/net/spider_net.h

+4 −4
Original line number Diff line number Diff line
@@ -24,7 +24,7 @@ 
#ifndef _SPIDER_NET_H

#define _SPIDER_NET_H



#define VERSION "1.5 A"

#define VERSION "1.6 A"



#include "sungem_phy.h"
@@ -217,8 +217,7 @@ extern char spider_net_driver_name[]; 
#define SPIDER_NET_GDTBSTA             0x00000300

#define SPIDER_NET_GDTDCEIDIS          0x00000002

#define SPIDER_NET_DMA_TX_VALUE        SPIDER_NET_TX_DMA_EN | \

                                       SPIDER_NET_GDTBSTA | \

                                       SPIDER_NET_GDTDCEIDIS

                                       SPIDER_NET_GDTBSTA



#define SPIDER_NET_DMA_TX_FEND_VALUE	0x00030003
@@ -328,7 +327,8 @@ enum spider_net_int2_status { 
	SPIDER_NET_GRISPDNGINT

};



#define SPIDER_NET_TXINT	( (1 << SPIDER_NET_GDTFDCINT) )

#define SPIDER_NET_TXINT	( (1 << SPIDER_NET_GDTFDCINT) | \

                             (1 << SPIDER_NET_GDTDCEINT) )



/* We rely on flagged descriptor interrupts */

#define SPIDER_NET_RXINT	( (1 << SPIDER_NET_GDAFDCINT) )

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