diff options
| author | ryo <ryo@NetBSD.org> | 2022-08-24 19:22:37 +0000 |
|---|---|---|
| committer | ryo <ryo@NetBSD.org> | 2022-08-24 19:22:37 +0000 |
| commit | 3b5eb7d178666bf02895d525cd5ea6f7913c8a44 (patch) | |
| tree | 9353119c3f6aa779d3e9a420848f5acb80d44bd5 /sys/dev/ic | |
| parent | 17f546fd57576c29eb9e035ed8dae6363a192330 (diff) | |
jumboframe support for eqos(4)
Tested up to mtu=9000. Hardware may allow up to mtu=16364
(frame length=16382), but this has not been tested.
- Separate calls to eqos_setup_rxdesc() from eqos_setup_rxbuf().
if m_getcl() fails, discard the packets received at that time
and reuse for the next buffer.
- Restore m_adj(m, ETHER_ALIGN) with limited conditions.
Only if MCLBYTES is greater than 2050, so it is not normally aligned.
Diffstat (limited to 'sys/dev/ic')
| -rw-r--r-- | sys/dev/ic/dwc_eqos.c | 158 | ||||
| -rw-r--r-- | sys/dev/ic/dwc_eqos_var.h | 7 |
2 files changed, 135 insertions, 30 deletions
diff --git a/sys/dev/ic/dwc_eqos.c b/sys/dev/ic/dwc_eqos.c index a41bc051af3..04f41b27927 100644 --- a/sys/dev/ic/dwc_eqos.c +++ b/sys/dev/ic/dwc_eqos.c @@ -1,4 +1,4 @@ -/* $NetBSD: dwc_eqos.c,v 1.12 2022/08/24 19:21:41 ryo Exp $ */ +/* $NetBSD: dwc_eqos.c,v 1.13 2022/08/24 19:22:37 ryo Exp $ */ /*- * Copyright (c) 2022 Jared McNeill <jmcneill@invisible.ca> @@ -33,7 +33,7 @@ #include "opt_net_mpsafe.h" #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: dwc_eqos.c,v 1.12 2022/08/24 19:21:41 ryo Exp $"); +__KERNEL_RCSID(0, "$NetBSD: dwc_eqos.c,v 1.13 2022/08/24 19:22:37 ryo Exp $"); #include <sys/param.h> #include <sys/bus.h> @@ -59,7 +59,10 @@ __KERNEL_RCSID(0, "$NetBSD: dwc_eqos.c,v 1.12 2022/08/24 19:21:41 ryo Exp $"); #include <dev/ic/dwc_eqos_reg.h> #include <dev/ic/dwc_eqos_var.h> -CTASSERT(MCLBYTES == 2048); +#define EQOS_MAX_MTU 9000 /* up to 16364? but not tested */ +#define EQOS_TXDMA_SIZE (EQOS_MAX_MTU + ETHER_HDR_LEN + ETHER_CRC_LEN) +#define EQOS_RXDMA_SIZE 2048 /* Fixed value by hardware */ +CTASSERT(MCLBYTES >= EQOS_RXDMA_SIZE); #ifdef EQOS_DEBUG unsigned int eqos_debug; @@ -365,6 +368,10 @@ eqos_setup_rxbuf(struct eqos_softc *sc, int index, struct mbuf *m) { int error; +#if MCLBYTES >= (EQOS_RXDMA_SIZE + ETHER_ALIGN) + m_adj(m, ETHER_ALIGN); +#endif + error = bus_dmamap_load_mbuf(sc->sc_dmat, sc->sc_rx.buf_map[index].map, m, BUS_DMA_READ | BUS_DMA_NOWAIT); if (error != 0) @@ -375,8 +382,6 @@ eqos_setup_rxbuf(struct eqos_softc *sc, int index, struct mbuf *m) BUS_DMASYNC_PREREAD); sc->sc_rx.buf_map[index].mbuf = m; - eqos_setup_rxdesc(sc, index, - sc->sc_rx.buf_map[index].map->dm_segs[0].ds_addr); return 0; } @@ -524,6 +529,12 @@ eqos_init_rings(struct eqos_softc *sc, int qid) { sc->sc_tx.cur = sc->sc_tx.next = sc->sc_tx.queued = 0; + sc->sc_rx_discarding = false; + if (sc->sc_rx_receiving_m != NULL) + m_freem(sc->sc_rx_receiving_m); + sc->sc_rx_receiving_m = NULL; + sc->sc_rx_receiving_m_last = NULL; + WR4(sc, GMAC_DMA_CHAN0_TX_BASE_ADDR_HI, (uint32_t)(sc->sc_tx.desc_ring_paddr >> 32)); WR4(sc, GMAC_DMA_CHAN0_TX_BASE_ADDR, @@ -737,9 +748,15 @@ static void eqos_rxintr(struct eqos_softc *sc, int qid) { struct ifnet *ifp = &sc->sc_ec.ec_if; - int error, index, len, pkts = 0; - struct mbuf *m, *m0; + int error, index, pkts = 0; + struct mbuf *m, *m0, *new_m, *mprev; uint32_t tdes3; + bool discarding; + + /* restore jumboframe context */ + discarding = sc->sc_rx_discarding; + m0 = sc->sc_rx_receiving_m; + mprev = sc->sc_rx_receiving_m_last; for (index = sc->sc_rx.cur; ; index = RX_NEXT(index)) { eqos_dma_sync(sc, sc->sc_rx.desc_map, @@ -751,33 +768,100 @@ eqos_rxintr(struct eqos_softc *sc, int qid) break; } + /* now discarding untill the last packet */ + if (discarding) + goto rx_next; + + if ((tdes3 & EQOS_TDES3_RX_CTXT) != 0) + goto rx_next; /* ignore receive context descriptor */ + + /* error packet? */ + if ((tdes3 & (EQOS_TDES3_RX_CE | EQOS_TDES3_RX_RWT | + EQOS_TDES3_RX_OE | EQOS_TDES3_RX_RE | + EQOS_TDES3_RX_DE)) != 0) { +#ifdef EQOS_DEBUG + char buf[128]; + snprintb(buf, sizeof(buf), + "\177\020" + "b\x1e" "CTXT\0" /* 30 */ + "b\x18" "CE\0" /* 24 */ + "b\x17" "GP\0" /* 23 */ + "b\x16" "WDT\0" /* 22 */ + "b\x15" "OE\0" /* 21 */ + "b\x14" "RE\0" /* 20 */ + "b\x13" "DE\0" /* 19 */ + "b\x0f" "ES\0" /* 15 */ + "\0", tdes3); + DPRINTF(EDEB_NOTE, "rxdesc[%d].tdes3=%s\n", index, buf); +#endif + if_statinc(ifp, if_ierrors); + if (m0 != NULL) { + m_freem(m0); + m0 = mprev = NULL; + } + discarding = true; + goto rx_next; + } + bus_dmamap_sync(sc->sc_dmat, sc->sc_rx.buf_map[index].map, 0, sc->sc_rx.buf_map[index].map->dm_mapsize, BUS_DMASYNC_POSTREAD); - bus_dmamap_unload(sc->sc_dmat, - sc->sc_rx.buf_map[index].map); - - len = tdes3 & EQOS_TDES3_RX_LENGTH_MASK; - if (len != 0) { - m = sc->sc_rx.buf_map[index].mbuf; - m_set_rcvif(m, ifp); - m->m_flags |= M_HASFCS; - m->m_pkthdr.len = len; - m->m_len = len; - m->m_nextpkt = NULL; - - if_percpuq_enqueue(ifp->if_percpuq, m); - ++pkts; + m = sc->sc_rx.buf_map[index].mbuf; + new_m = eqos_alloc_mbufcl(sc); + if (new_m == NULL) { + /* + * cannot allocate new mbuf. discard this received + * packet, and reuse the mbuf for next. + */ + if_statinc(ifp, if_ierrors); + if (m0 != NULL) { + /* also discard the halfway jumbo packet */ + m_freem(m0); + m0 = mprev = NULL; + } + discarding = true; + goto rx_next; } + error = eqos_setup_rxbuf(sc, index, new_m); + if (error) + panic("%s: %s: unable to load RX mbuf. error=%d", + device_xname(sc->sc_dev), __func__, error); - if ((m0 = eqos_alloc_mbufcl(sc)) != NULL) { - error = eqos_setup_rxbuf(sc, index, m0); - if (error != 0) { - /* XXX hole in RX ring */ - } + if (m0 == NULL) { + m0 = m; } else { - if_statinc(ifp, if_ierrors); + if (m->m_flags & M_PKTHDR) + m_remove_pkthdr(m); + mprev->m_next = m; + } + mprev = m; + + if ((tdes3 & EQOS_TDES3_RX_LD) == 0) { + /* to be continued in the next segment */ + m->m_len = EQOS_RXDMA_SIZE; + } else { + /* last segment */ + uint32_t totallen = tdes3 & EQOS_TDES3_RX_LENGTH_MASK; + uint32_t mlen = totallen % EQOS_RXDMA_SIZE; + if (mlen == 0) + mlen = EQOS_RXDMA_SIZE; + m->m_len = mlen; + m0->m_pkthdr.len = totallen; + m_set_rcvif(m0, ifp); + m0->m_flags |= M_HASFCS; + m0->m_nextpkt = NULL; + if_percpuq_enqueue(ifp->if_percpuq, m0); + m0 = mprev = NULL; + + ++pkts; } + + rx_next: + if (discarding && (tdes3 & EQOS_TDES3_RX_LD) != 0) + discarding = false; + + eqos_setup_rxdesc(sc, index, + sc->sc_rx.buf_map[index].map->dm_segs[0].ds_addr); eqos_dma_sync(sc, sc->sc_rx.desc_map, index, index + 1, RX_DESC_COUNT, BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); @@ -786,6 +870,10 @@ eqos_rxintr(struct eqos_softc *sc, int qid) (uint32_t)sc->sc_rx.desc_ring_paddr + DESC_OFF(sc->sc_rx.cur)); } + /* save jumboframe context */ + sc->sc_rx_discarding = discarding; + sc->sc_rx_receiving_m = m0; + sc->sc_rx_receiving_m_last = mprev; sc->sc_rx.cur = index; @@ -1053,6 +1141,7 @@ static int eqos_ioctl(struct ifnet *ifp, u_long cmd, void *data) { struct eqos_softc *sc = ifp->if_softc; + struct ifreq *ifr = (struct ifreq *)data; int error, s; #ifndef EQOS_MPSAFE @@ -1060,6 +1149,14 @@ eqos_ioctl(struct ifnet *ifp, u_long cmd, void *data) #endif switch (cmd) { + case SIOCSIFMTU: + if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > EQOS_MAX_MTU) { + error = EINVAL; + } else { + ifp->if_mtu = ifr->ifr_mtu; + error = 0; /* no need ENETRESET */ + } + break; default: #ifdef EQOS_MPSAFE s = splnet(); @@ -1196,7 +1293,7 @@ eqos_setup_dma(struct eqos_softc *sc, int qid) sc->sc_tx.queued = TX_DESC_COUNT; for (i = 0; i < TX_DESC_COUNT; i++) { - error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, + error = bus_dmamap_create(sc->sc_dmat, EQOS_TXDMA_SIZE, TX_MAX_SEGS, MCLBYTES, 0, BUS_DMA_WAITOK, &sc->sc_tx.buf_map[i].map); if (error != 0) { @@ -1250,6 +1347,8 @@ eqos_setup_dma(struct eqos_softc *sc, int qid) device_printf(sc->sc_dev, "cannot create RX buffer\n"); return error; } + eqos_setup_rxdesc(sc, i, + sc->sc_rx.buf_map[i].map->dm_segs[0].ds_addr); } bus_dmamap_sync(sc->sc_dmat, sc->sc_rx.desc_map, 0, sc->sc_rx.desc_map->dm_mapsize, @@ -1369,8 +1468,9 @@ eqos_attach(struct eqos_softc *sc) IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); IFQ_SET_READY(&ifp->if_snd); - /* 802.1Q VLAN-sized frames are supported */ + /* 802.1Q VLAN-sized frames, and jumbo frame are supported */ sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU; + sc->sc_ec.ec_capabilities |= ETHERCAP_JUMBO_MTU; /* Attach MII driver */ sc->sc_ec.ec_mii = mii; diff --git a/sys/dev/ic/dwc_eqos_var.h b/sys/dev/ic/dwc_eqos_var.h index ed529ab0d09..9834e83e290 100644 --- a/sys/dev/ic/dwc_eqos_var.h +++ b/sys/dev/ic/dwc_eqos_var.h @@ -1,4 +1,4 @@ -/* $NetBSD: dwc_eqos_var.h,v 1.3 2022/01/09 00:36:28 mrg Exp $ */ +/* $NetBSD: dwc_eqos_var.h,v 1.4 2022/08/24 19:22:37 ryo Exp $ */ /*- * Copyright (c) 2022 Jared McNeill <jmcneill@invisible.ca> @@ -71,6 +71,11 @@ struct eqos_softc { struct eqos_ring sc_tx; struct eqos_ring sc_rx; + /* receiving context for jumbo frame */ + bool sc_rx_discarding; + struct mbuf *sc_rx_receiving_m; + struct mbuf *sc_rx_receiving_m_last; + krndsource_t sc_rndsource; /* Indents indicate groups within evcnt. */ |
