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Set maximum read byte count to 2048 for PCI-X BCM5703/5704 devices.

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For PCI-X BCM5704, set maximum outstanding split transactions to 0.
Same as Linux tg3 and FreeBSD (part of FreeBSD r204978).
This commit is contained in:
msaitoh 2013-10-28 05:37:24 +00:00
parent 27d21cc6e9
commit 66aec3e6de
1 changed files with 16 additions and 3 deletions
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19
sys/dev/pci/if_bge.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_bge.c,v 1.259 2013/09/12 21:11:37 martin Exp $ */
/* $NetBSD: if_bge.c,v 1.260 2013/10/28 05:37:24 msaitoh Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
@ -79,7 +79,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.259 2013/09/12 21:11:37 martin Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.260 2013/10/28 05:37:24 msaitoh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -4166,10 +4166,23 @@ bge_reset(struct bge_softc *sc)
pci_conf_write(sc->sc_pc, sc->sc_pcitag, BGE_PCI_CACHESZ, cachesize);
pci_conf_write(sc->sc_pc, sc->sc_pcitag, BGE_PCI_CMD, command);
/* Step 11: disable PCI-X Relaxed Ordering. */
/* 57xx step 11: disable PCI-X Relaxed Ordering. */
if (sc->bge_flags & BGE_PCIX) {
reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, sc->bge_pcixcap
+ PCIX_CMD);
/* Set max memory read byte count to 2K */
if (BGE_ASICREV(sc->bge_chipid) == BGE_ASICREV_BCM5703) {
reg &= ~PCIX_CMD_BYTECNT_MASK;
reg |= PCIX_CMD_BCNT_2048;
} else if (BGE_ASICREV(sc->bge_chipid) == BGE_ASICREV_BCM5704){
/*
* For 5704, set max outstanding split transaction
* field to 0 (0 means it supports 1 request)
*/
reg &= ~(PCIX_CMD_SPLTRANS_MASK
| PCIX_CMD_BYTECNT_MASK);
reg |= PCIX_CMD_BCNT_2048;
}
pci_conf_write(sc->sc_pc, sc->sc_pcitag, sc->bge_pcixcap
+ PCIX_CMD, reg & ~PCIX_CMD_RELAXED_ORDER);
}