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Make it possible to use 16k MTU.

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This commit is contained in:
ragge 2004-04-13 11:40:06 +00:00
parent d729cba0a7
commit ef66f543d0
1 changed files with 19 additions and 4 deletions
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23
sys/dev/pci/if_dge.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_dge.c,v 1.1 2004/03/12 13:46:52 ragge Exp $ */
/* $NetBSD: if_dge.c,v 1.2 2004/04/13 11:40:06 ragge Exp $ */
/*
* Copyright (c) 2004, SUNET, Swedish University Computer Network.
@ -74,14 +74,13 @@
*
* TODO (in no specific order):
* HW VLAN support.
* Large jumbo buffers (16k).
* TSE offloading (needs kernel changes...)
* RAIDC (receive interrupt delay adaptation)
* Use memory > 4GB.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_dge.c,v 1.1 2004/03/12 13:46:52 ragge Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_dge.c,v 1.2 2004/04/13 11:40:06 ragge Exp $");
#include "bpfilter.h"
#include "rnd.h"
@ -216,6 +215,11 @@ struct dge_control_data {
#define DGE_CDTXOFF(x) DGE_CDOFF(wcd_txdescs[(x)])
#define DGE_CDRXOFF(x) DGE_CDOFF(wcd_rxdescs[(x)])
/*
* The DGE interface have a higher max MTU size than normal jumbo frames.
*/
#define DGE_MAX_MTU 16288 /* Max MTU size for this interface */
/*
* Software state for transmit jobs.
*/
@ -616,7 +620,7 @@ dge_attach(struct device *parent, struct device *self, void *aux)
* Create the transmit buffer DMA maps.
*/
for (i = 0; i < DGE_TXQUEUELEN; i++) {
if ((error = bus_dmamap_create(sc->sc_dmat, ETHER_MAX_LEN_JUMBO,
if ((error = bus_dmamap_create(sc->sc_dmat, DGE_MAX_MTU,
DGE_NTXSEGS, MCLBYTES, 0, 0,
&sc->sc_txsoft[i].txs_dmamap)) != 0) {
aprint_error("%s: unable to create Tx DMA map %d, "
@ -1236,6 +1240,17 @@ dge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
case SIOCSIFMTU:
if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > DGE_MAX_MTU) {
error = EINVAL;
} else {
error = 0;
ifp->if_mtu = ifr->ifr_mtu;
if (ifp->if_flags & IFF_UP)
error = (*ifp->if_init)(ifp);
}
break;
case SIOCSIFFLAGS:
/* extract link flags */
if ((ifp->if_flags & IFF_LINK0) == 0 &&