diff options
| -rw-r--r-- | sys/dev/sis/if_sis.c | 86 | ||||
| -rw-r--r-- | sys/dev/sis/if_sisreg.h | 5 |
2 files changed, 81 insertions, 10 deletions
diff --git a/sys/dev/sis/if_sis.c b/sys/dev/sis/if_sis.c index ee12a9c..ceff6b8 100644 --- a/sys/dev/sis/if_sis.c +++ b/sys/dev/sis/if_sis.c @@ -73,6 +73,7 @@ __FBSDID("$FreeBSD$"); #include <sys/module.h> #include <sys/socket.h> #include <sys/sockio.h> +#include <sys/sysctl.h> #include <net/if.h> #include <net/if_arp.h> @@ -150,6 +151,7 @@ static int sis_rxeof(struct sis_softc *); static void sis_start(struct ifnet *); static void sis_startl(struct ifnet *); static void sis_stop(struct sis_softc *); +static void sis_add_sysctls(struct sis_softc *); static void sis_watchdog(struct sis_softc *); @@ -710,24 +712,24 @@ sis_miibus_statchg(device_t dev) (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) return; - sc->sis_link = 0; + sc->sis_flags &= ~SIS_FLAG_LINK; if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == (IFM_ACTIVE | IFM_AVALID)) { switch (IFM_SUBTYPE(mii->mii_media_active)) { case IFM_10_T: - sc->sis_link++; CSR_WRITE_4(sc, SIS_TX_CFG, SIS_TXCFG_10); + sc->sis_flags |= SIS_FLAG_LINK; break; case IFM_100_TX: - sc->sis_link++; CSR_WRITE_4(sc, SIS_TX_CFG, SIS_TXCFG_100); + sc->sis_flags |= SIS_FLAG_LINK; break; default: break; } } - if (sc->sis_link == 0) { + if ((sc->sis_flags & SIS_FLAG_LINK) == 0) { /* * Stopping MACs seem to reset SIS_TX_LISTPTR and * SIS_RX_LISTPTR which in turn requires resetting @@ -1122,6 +1124,8 @@ sis_attach(device_t dev) break; } + sis_add_sysctls(sc); + /* Allocate DMA'able memory. */ if ((error = sis_dma_alloc(sc)) != 0) goto fail; @@ -1698,7 +1702,7 @@ sis_tick(void *xsc) mii = device_get_softc(sc->sis_miibus); mii_tick(mii); sis_watchdog(sc); - if (sc->sis_link == 0) + if ((sc->sis_flags & SIS_FLAG_LINK) == 0) sis_miibus_statchg(sc->sis_dev); callout_reset(&sc->sis_stat_ch, hz, sis_tick, sc); } @@ -1829,9 +1833,41 @@ sis_encap(struct sis_softc *sc, struct mbuf **m_head) bus_dma_segment_t segs[SIS_MAXTXSEGS]; bus_dmamap_t map; int error, i, frag, nsegs, prod; + int padlen; prod = sc->sis_tx_prod; txd = &sc->sis_txdesc[prod]; + if ((sc->sis_flags & SIS_FLAG_MANUAL_PAD) != 0 && + (*m_head)->m_pkthdr.len < SIS_MIN_FRAMELEN) { + m = *m_head; + padlen = SIS_MIN_FRAMELEN - m->m_pkthdr.len; + if (M_WRITABLE(m) == 0) { + /* Get a writable copy. */ + m = m_dup(*m_head, M_DONTWAIT); + m_freem(*m_head); + if (m == NULL) { + *m_head = NULL; + return (ENOBUFS); + } + *m_head = m; + } + if (m->m_next != NULL || M_TRAILINGSPACE(m) < padlen) { + m = m_defrag(m, M_DONTWAIT); + if (m == NULL) { + m_freem(*m_head); + *m_head = NULL; + return (ENOBUFS); + } + } + /* + * Manually pad short frames, and zero the pad space + * to avoid leaking data. + */ + bzero(mtod(m, char *) + m->m_pkthdr.len, padlen); + m->m_pkthdr.len += padlen; + m->m_len = m->m_pkthdr.len; + *m_head = m; + } error = bus_dmamap_load_mbuf_sg(sc->sis_tx_tag, txd->tx_dmamap, *m_head, segs, &nsegs, 0); if (error == EFBIG) { @@ -1918,7 +1954,7 @@ sis_startl(struct ifnet *ifp) SIS_LOCK_ASSERT(sc); if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != - IFF_DRV_RUNNING || sc->sis_link == 0) + IFF_DRV_RUNNING || (sc->sis_flags & SIS_FLAG_LINK) == 0) return; for (queued = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && @@ -2025,6 +2061,13 @@ sis_initl(struct sis_softc *sc) return; } + if (sc->sis_type == SIS_TYPE_83815 || sc->sis_type == SIS_TYPE_83816) { + if (sc->sis_manual_pad != 0) + sc->sis_flags |= SIS_FLAG_MANUAL_PAD; + else + sc->sis_flags &= ~SIS_FLAG_MANUAL_PAD; + } + /* * Short Cable Receive Errors (MP21.E) * also: Page 78 of the DP83815 data sheet (september 2002 version) @@ -2125,7 +2168,7 @@ sis_initl(struct sis_softc *sc) /* Clear MAC disable. */ SIS_CLRBIT(sc, SIS_CSR, SIS_CSR_TX_DISABLE | SIS_CSR_RX_DISABLE); - sc->sis_link = 0; + sc->sis_flags &= ~SIS_FLAG_LINK; mii_mediachg(mii); ifp->if_drv_flags |= IFF_DRV_RUNNING; @@ -2148,7 +2191,6 @@ sis_ifmedia_upd(struct ifnet *ifp) SIS_LOCK(sc); mii = device_get_softc(sc->sis_miibus); - sc->sis_link = 0; if (mii->mii_instance) { struct mii_softc *miisc; LIST_FOREACH(miisc, &mii->mii_phys, mii_list) @@ -2304,7 +2346,7 @@ sis_stop(struct sis_softc *sc) CSR_WRITE_4(sc, SIS_TX_LISTPTR, 0); CSR_WRITE_4(sc, SIS_RX_LISTPTR, 0); - sc->sis_link = 0; + sc->sis_flags &= ~SIS_FLAG_LINK; /* * Free data in the RX lists. @@ -2351,6 +2393,32 @@ sis_shutdown(device_t dev) return (0); } +static void +sis_add_sysctls(struct sis_softc *sc) +{ + struct sysctl_ctx_list *ctx; + struct sysctl_oid_list *children; + char tn[32]; + int unit; + + ctx = device_get_sysctl_ctx(sc->sis_dev); + children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->sis_dev)); + + unit = device_get_unit(sc->sis_dev); + /* + * Unlike most other controllers, NS DP83815/DP83816 controllers + * seem to pad with 0xFF when it encounter short frames. According + * to RFC 1042 the pad bytes should be 0x00. Turning this tunable + * on will have driver pad manully but it's disabled by default + * because it will consume extra CPU cycles for short frames. + */ + sc->sis_manual_pad = 0; + snprintf(tn, sizeof(tn), "dev.sis.%d.manual_pad", unit); + TUNABLE_INT_FETCH(tn, &sc->sis_manual_pad); + SYSCTL_ADD_INT(ctx, children, OID_AUTO, "manual_pad", + CTLFLAG_RW, &sc->sis_manual_pad, 0, "Manually pad short frames"); +} + static device_method_t sis_methods[] = { /* Device interface */ DEVMETHOD(device_probe, sis_probe), diff --git a/sys/dev/sis/if_sisreg.h b/sys/dev/sis/if_sisreg.h index 5bcdcae..42181a1 100644 --- a/sys/dev/sis/if_sisreg.h +++ b/sys/dev/sis/if_sisreg.h @@ -449,7 +449,10 @@ struct sis_softc { device_t sis_miibus; uint8_t sis_type; uint8_t sis_rev; - uint8_t sis_link; + uint32_t sis_flags; +#define SIS_FLAG_MANUAL_PAD 0x0800 +#define SIS_FLAG_LINK 0x8000 + int sis_manual_pad; uint32_t sis_srr; struct sis_desc *sis_rx_list; struct sis_desc *sis_tx_list; |
