/* $OpenBSD: if_cpsw.c,v 1.7 2013/09/12 00:14:57 dlg Exp $ */ /* $NetBSD: if_cpsw.c,v 1.3 2013/04/17 14:36:34 bouyer Exp $ */ /* * Copyright (c) 2013 Jonathan A. Kollasch * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 2012 Damjan Marion * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include #include #include #include #include #define CPSW_TXFRAGS 16 #define OMAP2SCM_MAC_ID0_LO 0x630 #define OMAP2SCM_MAC_ID0_HI 0x634 #define CPSW_CPPI_RAM_SIZE (0x2000) #define CPSW_CPPI_RAM_TXDESCS_SIZE (CPSW_CPPI_RAM_SIZE/2) #define CPSW_CPPI_RAM_RXDESCS_SIZE \ (CPSW_CPPI_RAM_SIZE - CPSW_CPPI_RAM_TXDESCS_SIZE) #define CPSW_CPPI_RAM_TXDESCS_BASE (CPSW_CPPI_RAM_OFFSET + 0x0000) #define CPSW_CPPI_RAM_RXDESCS_BASE \ (CPSW_CPPI_RAM_OFFSET + CPSW_CPPI_RAM_TXDESCS_SIZE) #define CPSW_NTXDESCS (CPSW_CPPI_RAM_TXDESCS_SIZE/sizeof(struct cpsw_cpdma_bd)) #define CPSW_NRXDESCS (CPSW_CPPI_RAM_RXDESCS_SIZE/sizeof(struct cpsw_cpdma_bd)) #define CPSW_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN) #define TXDESC_NEXT(x) cpsw_txdesc_adjust((x), 1) #define TXDESC_PREV(x) cpsw_txdesc_adjust((x), -1) #define RXDESC_NEXT(x) cpsw_rxdesc_adjust((x), 1) #define RXDESC_PREV(x) cpsw_rxdesc_adjust((x), -1) /* __BIT(n): nth bit, where __BIT(0) == 0x1. */ #define __BIT(__n) \ (((uint32_t)(__n) >= NBBY * sizeof(uint32_t)) ? 0 : ((uint32_t)1 << (uint32_t)(__n))) /* __BITS(m, n): bits m through n, m < n. */ #define __BITS(__m, __n) \ ((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1)) /* find least significant bit that is set */ #define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask)) #define __PRIuBIT PRIuMAX #define __PRIuBITS __PRIuBIT #define __PRIxBIT PRIxMAX #define __PRIxBITS __PRIxBIT #define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask)) struct cpsw_ring_data { bus_dmamap_t tx_dm[CPSW_NTXDESCS]; struct mbuf *tx_mb[CPSW_NTXDESCS]; bus_dmamap_t rx_dm[CPSW_NRXDESCS]; struct mbuf *rx_mb[CPSW_NRXDESCS]; }; struct cpsw_softc { struct device sc_dev; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; bus_dma_tag_t sc_bdt; bus_space_handle_t sc_bsh_txdescs; bus_space_handle_t sc_bsh_rxdescs; bus_addr_t sc_txdescs_pa; bus_addr_t sc_rxdescs_pa; struct arpcom sc_ac; struct mii_data sc_mii; void *sc_ih; struct cpsw_ring_data *sc_rdp; volatile u_int sc_txnext; volatile u_int sc_txhead; volatile u_int sc_rxhead; void *sc_rxthih; void *sc_rxih; void *sc_txih; void *sc_miscih; void *sc_txpad; bus_dmamap_t sc_txpad_dm; #define sc_txpad_pa sc_txpad_dm->dm_segs[0].ds_addr volatile bool sc_txrun; volatile bool sc_rxrun; volatile bool sc_txeoq; volatile bool sc_rxeoq; struct timeout sc_tick; }; #define DEVNAME(_sc) ((_sc)->sc_dev.dv_xname) void cpsw_get_mac_addr(struct cpsw_softc *); void cpsw_attach(struct device *, struct device *, void *); void cpsw_start(struct ifnet *); int cpsw_ioctl(struct ifnet *, u_long, caddr_t); void cpsw_watchdog(struct ifnet *); int cpsw_init(struct ifnet *); void cpsw_stop(struct ifnet *); int cpsw_mii_readreg(struct device *, int, int); void cpsw_mii_writereg(struct device *, int, int, int); void cpsw_mii_statchg(struct device *); void cpsw_tick(void *); int cpsw_new_rxbuf(struct cpsw_softc * const, const u_int); int cpsw_mediachange(struct ifnet *); void cpsw_mediastatus(struct ifnet *, struct ifmediareq *); int cpsw_rxthintr(void *); int cpsw_rxintr(void *); int cpsw_txintr(void *); int cpsw_miscintr(void *); struct cfattach cpsw_ca = { sizeof(struct cpsw_softc), NULL, cpsw_attach }; struct cfdriver cpsw_cd = { NULL, "cpsw", DV_IFNET }; /* * * Return the number of bytes in the mbuf chain, m. * */ static __inline u_int m_length(const struct mbuf *m) { const struct mbuf *m0; u_int pktlen; if ((m->m_flags & M_PKTHDR) != 0) return m->m_pkthdr.len; pktlen = 0; for (m0 = m; m0 != NULL; m0 = m0->m_next) pktlen += m0->m_len; return pktlen; } static inline u_int cpsw_txdesc_adjust(u_int x, int y) { return (((x) + y) & (CPSW_NTXDESCS - 1)); } static inline u_int cpsw_rxdesc_adjust(u_int x, int y) { return (((x) + y) & (CPSW_NRXDESCS - 1)); } static inline uint32_t cpsw_read_4(struct cpsw_softc * const sc, bus_size_t const offset) { return bus_space_read_4(sc->sc_bst, sc->sc_bsh, offset); } static inline void cpsw_write_4(struct cpsw_softc * const sc, bus_size_t const offset, uint32_t const value) { bus_space_write_4(sc->sc_bst, sc->sc_bsh, offset, value); } static inline void cpsw_set_txdesc_next(struct cpsw_softc * const sc, const u_int i, uint32_t n) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i + 0; bus_space_write_4(sc->sc_bst, sc->sc_bsh_txdescs, o, n); } static inline void cpsw_set_rxdesc_next(struct cpsw_softc * const sc, const u_int i, uint32_t n) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i + 0; bus_space_write_4(sc->sc_bst, sc->sc_bsh_rxdescs, o, n); } static inline void cpsw_get_txdesc(struct cpsw_softc * const sc, const u_int i, struct cpsw_cpdma_bd * const bdp) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i; uint32_t * const dp = bdp->word; const bus_size_t c = nitems(bdp->word); bus_space_read_region_4(sc->sc_bst, sc->sc_bsh_txdescs, o, dp, c); } static inline void cpsw_set_txdesc(struct cpsw_softc * const sc, const u_int i, struct cpsw_cpdma_bd * const bdp) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i; uint32_t * const dp = bdp->word; const bus_size_t c = nitems(bdp->word); bus_space_write_region_4(sc->sc_bst, sc->sc_bsh_txdescs, o, dp, c); } static inline void cpsw_get_rxdesc(struct cpsw_softc * const sc, const u_int i, struct cpsw_cpdma_bd * const bdp) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i; uint32_t * const dp = bdp->word; const bus_size_t c = nitems(bdp->word); bus_space_read_region_4(sc->sc_bst, sc->sc_bsh_rxdescs, o, dp, c); } static inline void cpsw_set_rxdesc(struct cpsw_softc * const sc, const u_int i, struct cpsw_cpdma_bd * const bdp) { const bus_size_t o = sizeof(struct cpsw_cpdma_bd) * i; uint32_t * const dp = bdp->word; const bus_size_t c = nitems(bdp->word); bus_space_write_region_4(sc->sc_bst, sc->sc_bsh_rxdescs, o, dp, c); } static inline bus_addr_t cpsw_txdesc_paddr(struct cpsw_softc * const sc, u_int x) { KASSERT(x < CPSW_NTXDESCS); return sc->sc_txdescs_pa + sizeof(struct cpsw_cpdma_bd) * x; } static inline bus_addr_t cpsw_rxdesc_paddr(struct cpsw_softc * const sc, u_int x) { KASSERT(x < CPSW_NRXDESCS); return sc->sc_rxdescs_pa + sizeof(struct cpsw_cpdma_bd) * x; } void cpsw_get_mac_addr(struct cpsw_softc *sc) { struct arpcom *ac = &sc->sc_ac; u_int32_t mac_lo = 0, mac_hi = 0; sitara_cm_reg_read_4(OMAP2SCM_MAC_ID0_LO, &mac_lo); sitara_cm_reg_read_4(OMAP2SCM_MAC_ID0_HI, &mac_hi); if ((mac_lo == 0) && (mac_hi == 0)) { CPSW_PRINTF(sc, "%s(%d): Invalid Ethernet address!\n", __FILE__, __LINE__); } else { ac->ac_enaddr[0] = (mac_hi >> 0) & 0xff; ac->ac_enaddr[1] = (mac_hi >> 8) & 0xff; ac->ac_enaddr[2] = (mac_hi >> 16) & 0xff; ac->ac_enaddr[3] = (mac_hi >> 24) & 0xff; ac->ac_enaddr[4] = (mac_lo >> 0) & 0xff; ac->ac_enaddr[5] = (mac_lo >> 8) & 0xff; } } void cpsw_attach(struct device *parent, struct device *self, void *aux) { struct cpsw_softc *sc = (struct cpsw_softc *)self; struct omap_attach_args *oa = aux; struct arpcom * const ac = &sc->sc_ac; struct ifnet * const ifp = &ac->ac_if; int error; u_int i; timeout_set(&sc->sc_tick, cpsw_tick, sc); cpsw_get_mac_addr(sc); sc->sc_rxthih = arm_intr_establish(oa->oa_dev->irq[0] + CPSW_INTROFF_RXTH, IPL_NET, cpsw_rxthintr, sc, DEVNAME(sc)); sc->sc_rxih = arm_intr_establish(oa->oa_dev->irq[0] + CPSW_INTROFF_RX, IPL_NET, cpsw_rxintr, sc, DEVNAME(sc)); sc->sc_txih = arm_intr_establish(oa->oa_dev->irq[0] + CPSW_INTROFF_TX, IPL_NET, cpsw_txintr, sc, DEVNAME(sc)); sc->sc_miscih = arm_intr_establish(oa->oa_dev->irq[0] + CPSW_INTROFF_MISC, IPL_NET, cpsw_miscintr, sc, DEVNAME(sc)); sc->sc_bst = oa->oa_iot; sc->sc_bdt = oa->oa_dmat; error = bus_space_map(sc->sc_bst, oa->oa_dev->mem[0].addr, oa->oa_dev->mem[0].size, 0, &sc->sc_bsh); if (error) { printf("can't map registers: %d\n", error); return; } sc->sc_txdescs_pa = oa->oa_dev->mem[0].addr + CPSW_CPPI_RAM_TXDESCS_BASE; error = bus_space_subregion(sc->sc_bst, sc->sc_bsh, CPSW_CPPI_RAM_TXDESCS_BASE, CPSW_CPPI_RAM_TXDESCS_SIZE, &sc->sc_bsh_txdescs); if (error) { printf("can't subregion tx ring SRAM: %d\n", error); return; } printf(" txdescs at %p", (void *)sc->sc_bsh_txdescs); sc->sc_rxdescs_pa = oa->oa_dev->mem[0].addr + CPSW_CPPI_RAM_RXDESCS_BASE; error = bus_space_subregion(sc->sc_bst, sc->sc_bsh, CPSW_CPPI_RAM_RXDESCS_BASE, CPSW_CPPI_RAM_RXDESCS_SIZE, &sc->sc_bsh_rxdescs); if (error) { printf("can't subregion rx ring SRAM: %d\n", error); return; } printf(" rxdescs at %p", (void *)sc->sc_bsh_rxdescs); sc->sc_rdp = malloc(sizeof(*sc->sc_rdp), M_TEMP, M_WAITOK); KASSERT(sc->sc_rdp != NULL); for (i = 0; i < CPSW_NTXDESCS; i++) { if ((error = bus_dmamap_create(sc->sc_bdt, MCLBYTES, CPSW_TXFRAGS, MCLBYTES, 0, 0, &sc->sc_rdp->tx_dm[i])) != 0) { printf("unable to create tx DMA map: %d\n", error); } sc->sc_rdp->tx_mb[i] = NULL; } for (i = 0; i < CPSW_NRXDESCS; i++) { if ((error = bus_dmamap_create(sc->sc_bdt, MCLBYTES, 1, MCLBYTES, 0, 0, &sc->sc_rdp->rx_dm[i])) != 0) { printf("unable to create rx DMA map: %d\n", error); } sc->sc_rdp->rx_mb[i] = NULL; } /* XXX Not sure if this is the correct way to do this. orig below. sc->sc_txpad = kmem_zalloc(ETHER_MIN_LEN, KM_SLEEP); */ sc->sc_txpad = malloc(ETHER_MIN_LEN, M_TEMP, M_WAITOK); KASSERT(sc->sc_txpad != NULL); bus_dmamap_create(sc->sc_bdt, ETHER_MIN_LEN, 1, ETHER_MIN_LEN, 0, BUS_DMA_WAITOK, &sc->sc_txpad_dm); bus_dmamap_load(sc->sc_bdt, sc->sc_txpad_dm, sc->sc_txpad, ETHER_MIN_LEN, NULL, BUS_DMA_WAITOK|BUS_DMA_WRITE); bus_dmamap_sync(sc->sc_bdt, sc->sc_txpad_dm, 0, ETHER_MIN_LEN, BUS_DMASYNC_PREWRITE); printf(", address %s\n", ether_sprintf(ac->ac_enaddr)); ifp->if_softc = sc; ifp->if_capabilities = 0; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_start = cpsw_start; ifp->if_ioctl = cpsw_ioctl; ifp->if_watchdog = cpsw_watchdog; IFQ_SET_MAXLEN(&ifp->if_snd, CPSW_NTXDESCS - 1); IFQ_SET_READY(&ifp->if_snd); memcpy(ifp->if_xname, DEVNAME(sc), IFNAMSIZ); cpsw_stop(ifp); sc->sc_mii.mii_ifp = ifp; sc->sc_mii.mii_readreg = cpsw_mii_readreg; sc->sc_mii.mii_writereg = cpsw_mii_writereg; sc->sc_mii.mii_statchg = cpsw_mii_statchg; ifmedia_init(&sc->sc_mii.mii_media, 0, cpsw_mediachange, cpsw_mediastatus); mii_attach(self, &sc->sc_mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0); if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) { printf("no PHY found!\n"); ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_MANUAL, 0, NULL); ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_MANUAL); } else { ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO); } if_attach(ifp); ether_ifattach(ifp); return; } int cpsw_mediachange(struct ifnet *ifp) { struct cpsw_softc *sc = ifp->if_softc; if (LIST_FIRST(&sc->sc_mii.mii_phys)) mii_mediachg(&sc->sc_mii); return (0); } void cpsw_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) { struct cpsw_softc *sc = ifp->if_softc; if (LIST_FIRST(&sc->sc_mii.mii_phys)) { mii_pollstat(&sc->sc_mii); ifmr->ifm_active = sc->sc_mii.mii_media_active; ifmr->ifm_status = sc->sc_mii.mii_media_status; } } void cpsw_start(struct ifnet *ifp) { struct cpsw_softc * const sc = ifp->if_softc; struct cpsw_ring_data * const rdp = sc->sc_rdp; struct cpsw_cpdma_bd bd; uint32_t * const dw = bd.word; struct mbuf *m; bus_dmamap_t dm; u_int sopi; /* Start of Packet Index */ u_int eopi = ~0; u_int seg; u_int txfree; int txstart = -1; int error; bool pad; u_int mlen; if (__predict_false((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)) { return; } if (sc->sc_txnext >= sc->sc_txhead) txfree = CPSW_NTXDESCS - 1 + sc->sc_txhead - sc->sc_txnext; else txfree = sc->sc_txhead - sc->sc_txnext - 1; while (txfree > 0) { IFQ_POLL(&ifp->if_snd, m); if (m == NULL) break; dm = rdp->tx_dm[sc->sc_txnext]; error = bus_dmamap_load_mbuf(sc->sc_bdt, dm, m, BUS_DMA_NOWAIT); if (error == EFBIG) { printf("won't fit\n"); IFQ_DEQUEUE(&ifp->if_snd, m); m_freem(m); ifp->if_oerrors++; continue; } else if (error != 0) { printf("error\n"); break; } if (dm->dm_nsegs + 1 >= txfree) { ifp->if_flags |= IFF_OACTIVE; bus_dmamap_unload(sc->sc_bdt, dm); break; } mlen = m_length(m); pad = mlen < CPSW_PAD_LEN; KASSERT(rdp->tx_mb[sc->sc_txnext] == NULL); rdp->tx_mb[sc->sc_txnext] = m; IFQ_DEQUEUE(&ifp->if_snd, m); bus_dmamap_sync(sc->sc_bdt, dm, 0, dm->dm_mapsize, BUS_DMASYNC_PREWRITE); if (txstart == -1) txstart = sc->sc_txnext; sopi = eopi = sc->sc_txnext; for (seg = 0; seg < dm->dm_nsegs; seg++) { dw[0] = cpsw_txdesc_paddr(sc, TXDESC_NEXT(sc->sc_txnext)); dw[1] = dm->dm_segs[seg].ds_addr; dw[2] = dm->dm_segs[seg].ds_len; dw[3] = 0; if (seg == 0) dw[3] |= CPDMA_BD_SOP | CPDMA_BD_OWNER | MAX(mlen, CPSW_PAD_LEN); if (seg == dm->dm_nsegs - 1 && !pad) dw[3] |= CPDMA_BD_EOP; cpsw_set_txdesc(sc, sc->sc_txnext, &bd); txfree--; eopi = sc->sc_txnext; sc->sc_txnext = TXDESC_NEXT(sc->sc_txnext); } if (pad) { dw[0] = cpsw_txdesc_paddr(sc, TXDESC_NEXT(sc->sc_txnext)); dw[1] = sc->sc_txpad_pa; dw[2] = CPSW_PAD_LEN - mlen; dw[3] = CPDMA_BD_EOP; cpsw_set_txdesc(sc, sc->sc_txnext, &bd); txfree--; eopi = sc->sc_txnext; sc->sc_txnext = TXDESC_NEXT(sc->sc_txnext); } #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT); #endif } if (txstart >= 0) { ifp->if_timer = 5; /* terminate the new chain */ KASSERT(eopi == TXDESC_PREV(sc->sc_txnext)); cpsw_set_txdesc_next(sc, TXDESC_PREV(sc->sc_txnext), 0); /* link the new chain on */ cpsw_set_txdesc_next(sc, TXDESC_PREV(txstart), cpsw_txdesc_paddr(sc, txstart)); if (sc->sc_txeoq) { /* kick the dma engine */ sc->sc_txeoq = false; cpsw_write_4(sc, CPSW_CPDMA_TX_HDP(0), cpsw_txdesc_paddr(sc, txstart)); } } } int cpsw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct cpsw_softc *sc = ifp->if_softc; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s = splnet(); int error = 0; switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; #ifdef INET if (ifa->ifa_addr->sa_family == AF_INET) arp_ifinit(&sc->sc_ac, ifa); #endif case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { if (ifp->if_flags & IFF_RUNNING) error = ENETRESET; else cpsw_init(ifp); } else { if (ifp->if_flags & IFF_RUNNING) cpsw_stop(ifp); } break; case SIOCSIFMEDIA: ifr->ifr_media &= ~IFM_ETH_FMASK; /* FALLTHROUGH */ case SIOCGIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd); break; default: error = ether_ioctl(ifp, &sc->sc_ac, cmd, data); break; } if (error == ENETRESET) { if (ifp->if_flags & IFF_RUNNING) cpsw_init(ifp); error = 0; } splx(s); return error; } void cpsw_watchdog(struct ifnet *ifp) { printf("device timeout\n"); ifp->if_oerrors++; cpsw_init(ifp); cpsw_start(ifp); } static int cpsw_mii_wait(struct cpsw_softc * const sc, int reg) { u_int tries; for(tries = 0; tries < 1000; tries++) { if ((cpsw_read_4(sc, reg) & __BIT(31)) == 0) return 0; delay(1); } return ETIMEDOUT; } int cpsw_mii_readreg(struct device *dev, int phy, int reg) { struct cpsw_softc * const sc = (struct cpsw_softc *)dev; uint32_t v; if (cpsw_mii_wait(sc, MDIOUSERACCESS0) != 0) return 0; cpsw_write_4(sc, MDIOUSERACCESS0, (1 << 31) | ((reg & 0x1F) << 21) | ((phy & 0x1F) << 16)); if (cpsw_mii_wait(sc, MDIOUSERACCESS0) != 0) return 0; v = cpsw_read_4(sc, MDIOUSERACCESS0); if (v & __BIT(29)) return v & 0xffff; else return 0; } void cpsw_mii_writereg(struct device *dev, int phy, int reg, int val) { struct cpsw_softc * const sc = (struct cpsw_softc *)dev; uint32_t v; KASSERT((val & 0xffff0000UL) == 0); if (cpsw_mii_wait(sc, MDIOUSERACCESS0) != 0) goto out; cpsw_write_4(sc, MDIOUSERACCESS0, (1 << 31) | (1 << 30) | ((reg & 0x1F) << 21) | ((phy & 0x1F) << 16) | val); if (cpsw_mii_wait(sc, MDIOUSERACCESS0) != 0) goto out; v = cpsw_read_4(sc, MDIOUSERACCESS0); if ((v & __BIT(29)) == 0) out: printf("%s error\n", __func__); } void cpsw_mii_statchg(struct device *self) { return; } int cpsw_new_rxbuf(struct cpsw_softc * const sc, const u_int i) { struct cpsw_ring_data * const rdp = sc->sc_rdp; const u_int h = RXDESC_PREV(i); struct cpsw_cpdma_bd bd; uint32_t * const dw = bd.word; struct mbuf *m; int error = ENOBUFS; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) { goto reuse; } MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); goto reuse; } /* We have a new buffer, prepare it for the ring. */ if (rdp->rx_mb[i] != NULL) bus_dmamap_unload(sc->sc_bdt, rdp->rx_dm[i]); m->m_len = m->m_pkthdr.len = MCLBYTES; rdp->rx_mb[i] = m; error = bus_dmamap_load_mbuf(sc->sc_bdt, rdp->rx_dm[i], rdp->rx_mb[i], BUS_DMA_READ|BUS_DMA_NOWAIT); if (error) { printf("can't load rx DMA map %d: %d\n", i, error); } bus_dmamap_sync(sc->sc_bdt, rdp->rx_dm[i], 0, rdp->rx_dm[i]->dm_mapsize, BUS_DMASYNC_PREREAD); error = 0; reuse: /* (re-)setup the descriptor */ dw[0] = 0; dw[1] = rdp->rx_dm[i]->dm_segs[0].ds_addr; dw[2] = MIN(0x7ff, rdp->rx_dm[i]->dm_segs[0].ds_len); dw[3] = CPDMA_BD_OWNER; cpsw_set_rxdesc(sc, i, &bd); /* and link onto ring */ cpsw_set_rxdesc_next(sc, h, cpsw_rxdesc_paddr(sc, i)); return error; } int cpsw_init(struct ifnet *ifp) { struct cpsw_softc * const sc = ifp->if_softc; struct arpcom *ac = &sc->sc_ac; struct mii_data * const mii = &sc->sc_mii; int i; cpsw_stop(ifp); sc->sc_txnext = 0; sc->sc_txhead = 0; /* Reset wrapper */ cpsw_write_4(sc, CPSW_WR_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_WR_SOFT_RESET) & 1); /* Reset SS */ cpsw_write_4(sc, CPSW_SS_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_SS_SOFT_RESET) & 1); /* Clear table (30) and enable ALE(31) and set passthrough (4) */ cpsw_write_4(sc, CPSW_ALE_CONTROL, (3 << 30) | 0x10); /* Reset and init Sliver port 1 and 2 */ for (i = 0; i < 2; i++) { /* Reset */ cpsw_write_4(sc, CPSW_SL_SOFT_RESET(i), 1); while(cpsw_read_4(sc, CPSW_SL_SOFT_RESET(i)) & 1); /* Set Slave Mapping */ cpsw_write_4(sc, CPSW_SL_RX_PRI_MAP(i), 0x76543210); cpsw_write_4(sc, CPSW_PORT_P_TX_PRI_MAP(i+1), 0x33221100); cpsw_write_4(sc, CPSW_SL_RX_MAXLEN(i), 0x5f2); /* Set MAC Address */ cpsw_write_4(sc, CPSW_PORT_P_SA_HI(i+1), ac->ac_enaddr[0] | (ac->ac_enaddr[1] << 8) | (ac->ac_enaddr[2] << 16) | (ac->ac_enaddr[3] << 24)); cpsw_write_4(sc, CPSW_PORT_P_SA_LO(i+1), ac->ac_enaddr[4] | (ac->ac_enaddr[5] << 8)); /* Set MACCONTROL for ports 0,1: FULLDUPLEX(1), GMII_EN(5), IFCTL_A(15), IFCTL_B(16) FIXME */ cpsw_write_4(sc, CPSW_SL_MACCONTROL(i), 1 | (1<<5) | (1<<15) | (1<<16)); /* Set ALE port to forwarding(3) */ cpsw_write_4(sc, CPSW_ALE_PORTCTL(i+1), 3); } /* Set Host Port Mapping */ cpsw_write_4(sc, CPSW_PORT_P0_CPDMA_TX_PRI_MAP, 0x76543210); cpsw_write_4(sc, CPSW_PORT_P0_CPDMA_RX_CH_MAP, 0); /* Set ALE port to forwarding(3) */ cpsw_write_4(sc, CPSW_ALE_PORTCTL(0), 3); cpsw_write_4(sc, CPSW_SS_PTYPE, 0); cpsw_write_4(sc, CPSW_SS_STAT_PORT_EN, 7); cpsw_write_4(sc, CPSW_CPDMA_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_CPDMA_SOFT_RESET) & 1); for (i = 0; i < 8; i++) { cpsw_write_4(sc, CPSW_CPDMA_TX_HDP(i), 0); cpsw_write_4(sc, CPSW_CPDMA_RX_HDP(i), 0); cpsw_write_4(sc, CPSW_CPDMA_TX_CP(i), 0); cpsw_write_4(sc, CPSW_CPDMA_RX_CP(i), 0); } bus_space_set_region_4(sc->sc_bst, sc->sc_bsh_txdescs, 0, 0, CPSW_CPPI_RAM_TXDESCS_SIZE/4); sc->sc_txhead = 0; sc->sc_txnext = 0; cpsw_write_4(sc, CPSW_CPDMA_RX_FREEBUFFER(0), 0); bus_space_set_region_4(sc->sc_bst, sc->sc_bsh_rxdescs, 0, 0, CPSW_CPPI_RAM_RXDESCS_SIZE/4); /* Initialize RX Buffer Descriptors */ cpsw_set_rxdesc_next(sc, RXDESC_PREV(0), 0); for (i = 0; i < CPSW_NRXDESCS; i++) { cpsw_new_rxbuf(sc, i); } sc->sc_rxhead = 0; /* align layer 3 header to 32-bit */ cpsw_write_4(sc, CPSW_CPDMA_RX_BUFFER_OFFSET, ETHER_ALIGN); /* Clear all interrupt Masks */ cpsw_write_4(sc, CPSW_CPDMA_RX_INTMASK_CLEAR, 0xFFFFFFFF); cpsw_write_4(sc, CPSW_CPDMA_TX_INTMASK_CLEAR, 0xFFFFFFFF); /* Enable TX & RX DMA */ cpsw_write_4(sc, CPSW_CPDMA_TX_CONTROL, 1); cpsw_write_4(sc, CPSW_CPDMA_RX_CONTROL, 1); /* Enable TX and RX interrupt receive for core 0 */ cpsw_write_4(sc, CPSW_WR_C_TX_EN(0), 1); cpsw_write_4(sc, CPSW_WR_C_RX_EN(0), 1); cpsw_write_4(sc, CPSW_WR_C_MISC_EN(0), 0x1F); /* Enable host Error Interrupt */ cpsw_write_4(sc, CPSW_CPDMA_DMA_INTMASK_SET, 2); /* Enable interrupts for TX and RX Channel 0 */ cpsw_write_4(sc, CPSW_CPDMA_TX_INTMASK_SET, 1); cpsw_write_4(sc, CPSW_CPDMA_RX_INTMASK_SET, 1); /* Ack stalled irqs */ cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RXTH); cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RX); cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_TX); cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_MISC); /* Initialze MDIO - ENABLE, PREAMBLE=0, FAULTENB, CLKDIV=0xFF */ /* TODO Calculate MDCLK=CLK/(CLKDIV+1) */ cpsw_write_4(sc, MDIOCONTROL, (1<<30) | (1<<18) | 0xFF); mii_mediachg(mii); /* Write channel 0 RX HDP */ cpsw_write_4(sc, CPSW_CPDMA_RX_HDP(0), cpsw_rxdesc_paddr(sc, 0)); sc->sc_rxrun = true; sc->sc_rxeoq = false; sc->sc_txrun = true; sc->sc_txeoq = true; ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; timeout_add_sec(&sc->sc_tick, 1); return 0; } void cpsw_stop(struct ifnet *ifp) { struct cpsw_softc * const sc = ifp->if_softc; struct cpsw_ring_data * const rdp = sc->sc_rdp; u_int i; #if 0 /* XXX find where disable comes from */ printf("%s: ifp %p disable %d\n", __func__, ifp, disable); #endif if ((ifp->if_flags & IFF_RUNNING) == 0) return; timeout_del(&sc->sc_tick); mii_down(&sc->sc_mii); cpsw_write_4(sc, CPSW_CPDMA_TX_INTMASK_CLEAR, 1); cpsw_write_4(sc, CPSW_CPDMA_RX_INTMASK_CLEAR, 1); cpsw_write_4(sc, CPSW_WR_C_TX_EN(0), 0x0); cpsw_write_4(sc, CPSW_WR_C_RX_EN(0), 0x0); cpsw_write_4(sc, CPSW_WR_C_MISC_EN(0), 0x1F); cpsw_write_4(sc, CPSW_CPDMA_TX_TEARDOWN, 0); cpsw_write_4(sc, CPSW_CPDMA_RX_TEARDOWN, 0); i = 0; while ((sc->sc_txrun || sc->sc_rxrun) && i < 10000) { delay(10); if ((sc->sc_txrun == true) && cpsw_txintr(sc) == 0) sc->sc_txrun = false; if ((sc->sc_rxrun == true) && cpsw_rxintr(sc) == 0) sc->sc_rxrun = false; i++; } /* printf("%s toredown complete in %u\n", __func__, i); */ /* Reset wrapper */ cpsw_write_4(sc, CPSW_WR_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_WR_SOFT_RESET) & 1); /* Reset SS */ cpsw_write_4(sc, CPSW_SS_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_SS_SOFT_RESET) & 1); for (i = 0; i < 2; i++) { cpsw_write_4(sc, CPSW_SL_SOFT_RESET(i), 1); while(cpsw_read_4(sc, CPSW_SL_SOFT_RESET(i)) & 1); } /* Reset CPDMA */ cpsw_write_4(sc, CPSW_CPDMA_SOFT_RESET, 1); while(cpsw_read_4(sc, CPSW_CPDMA_SOFT_RESET) & 1); /* Release any queued transmit buffers. */ for (i = 0; i < CPSW_NTXDESCS; i++) { bus_dmamap_unload(sc->sc_bdt, rdp->tx_dm[i]); m_freem(rdp->tx_mb[i]); rdp->tx_mb[i] = NULL; } ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE); ifp->if_timer = 0; /* XXX Not sure what this is doing calling disable here where is disable set? */ #if 0 if (!disable) return; #endif for (i = 0; i < CPSW_NRXDESCS; i++) { bus_dmamap_unload(sc->sc_bdt, rdp->rx_dm[i]); m_freem(rdp->rx_mb[i]); rdp->rx_mb[i] = NULL; } } int cpsw_rxthintr(void *arg) { struct cpsw_softc * const sc = arg; /* this won't deassert the interrupt though */ cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RXTH); return 1; } int cpsw_rxintr(void *arg) { struct cpsw_softc * const sc = arg; struct ifnet * const ifp = &sc->sc_ac.ac_if; struct cpsw_ring_data * const rdp = sc->sc_rdp; struct cpsw_cpdma_bd bd; const uint32_t * const dw = bd.word; bus_dmamap_t dm; struct mbuf *m; u_int i; u_int len, off; for (;;) { KASSERT(sc->sc_rxhead < CPSW_NRXDESCS); i = sc->sc_rxhead; dm = rdp->rx_dm[i]; m = rdp->rx_mb[i]; KASSERT(dm != NULL); KASSERT(m != NULL); cpsw_get_rxdesc(sc, i, &bd); if (ISSET(dw[3], CPDMA_BD_OWNER)) break; if (ISSET(dw[3], CPDMA_BD_TDOWNCMPLT)) { sc->sc_rxrun = false; return 1; } if ((dw[3] & (CPDMA_BD_SOP|CPDMA_BD_EOP)) != (CPDMA_BD_SOP|CPDMA_BD_EOP)) { /* Debugger(); */ } bus_dmamap_sync(sc->sc_bdt, dm, 0, dm->dm_mapsize, BUS_DMASYNC_POSTREAD); if (cpsw_new_rxbuf(sc, i) != 0) { /* drop current packet, reuse buffer for new */ ifp->if_ierrors++; goto next; } off = __SHIFTOUT(dw[2], (uint32_t)__BITS(26, 16)); len = __SHIFTOUT(dw[3], (uint32_t)__BITS(10, 0)); if (ISSET(dw[3], CPDMA_BD_PASSCRC)) len -= ETHER_CRC_LEN; m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = m->m_len = len; m->m_data += off; ifp->if_ipackets++; #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN); #endif ether_input_mbuf(ifp, m); next: sc->sc_rxhead = RXDESC_NEXT(sc->sc_rxhead); if (ISSET(dw[3], CPDMA_BD_EOQ)) { sc->sc_rxeoq = true; break; } else { sc->sc_rxeoq = false; } cpsw_write_4(sc, CPSW_CPDMA_RX_CP(0), cpsw_rxdesc_paddr(sc, i)); } if (sc->sc_rxeoq) { printf("rxeoq\n"); /* Debugger(); */ } cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_RX); return 1; } void cpsw_tick(void *arg) { struct cpsw_softc *sc = arg; int s; s = splnet(); mii_tick(&sc->sc_mii); splx(s); timeout_add_sec(&sc->sc_tick, 1); } int cpsw_txintr(void *arg) { struct cpsw_softc * const sc = arg; struct ifnet * const ifp = &sc->sc_ac.ac_if; struct cpsw_ring_data * const rdp = sc->sc_rdp; struct cpsw_cpdma_bd bd; const uint32_t * const dw = bd.word; bool handled = false; uint32_t tx0_cp; u_int cpi; KASSERT(sc->sc_txrun); tx0_cp = cpsw_read_4(sc, CPSW_CPDMA_TX_CP(0)); if (tx0_cp == 0xfffffffc) { cpsw_write_4(sc, CPSW_CPDMA_TX_CP(0), 0xfffffffc); cpsw_write_4(sc, CPSW_CPDMA_TX_HDP(0), 0); sc->sc_txrun = false; return 0; } cpi = (tx0_cp - sc->sc_txdescs_pa) / sizeof(struct cpsw_cpdma_bd); for (;;) { tx0_cp = cpsw_read_4(sc, CPSW_CPDMA_TX_CP(0)); cpi = (tx0_cp - sc->sc_txdescs_pa) / sizeof(struct cpsw_cpdma_bd); KASSERT(sc->sc_txhead < CPSW_NTXDESCS); cpsw_get_txdesc(sc, sc->sc_txhead, &bd); if (dw[2] == 0) { /* Debugger(); */ } if (ISSET(dw[3], CPDMA_BD_SOP) == 0) goto next; if (ISSET(dw[3], CPDMA_BD_OWNER)) { printf("pwned %x %x %x\n", cpi, sc->sc_txhead, sc->sc_txnext); break; } if (ISSET(dw[3], CPDMA_BD_TDOWNCMPLT)) { sc->sc_txrun = false; return 1; } bus_dmamap_sync(sc->sc_bdt, rdp->tx_dm[sc->sc_txhead], 0, rdp->tx_dm[sc->sc_txhead]->dm_mapsize, BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->sc_bdt, rdp->tx_dm[sc->sc_txhead]); m_freem(rdp->tx_mb[sc->sc_txhead]); rdp->tx_mb[sc->sc_txhead] = NULL; ifp->if_opackets++; handled = true; ifp->if_flags &= ~IFF_OACTIVE; next: if (ISSET(dw[3], CPDMA_BD_EOP) && ISSET(dw[3], CPDMA_BD_EOQ)) { sc->sc_txeoq = true; } if (sc->sc_txhead == cpi) { cpsw_write_4(sc, CPSW_CPDMA_TX_CP(0), cpsw_txdesc_paddr(sc, cpi)); sc->sc_txhead = TXDESC_NEXT(sc->sc_txhead); break; } sc->sc_txhead = TXDESC_NEXT(sc->sc_txhead); if (ISSET(dw[3], CPDMA_BD_EOP) && ISSET(dw[3], CPDMA_BD_EOQ)) { sc->sc_txeoq = true; break; } } cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_TX); if ((sc->sc_txnext != sc->sc_txhead) && sc->sc_txeoq) { if (cpsw_read_4(sc, CPSW_CPDMA_TX_HDP(0)) == 0) { sc->sc_txeoq = false; cpsw_write_4(sc, CPSW_CPDMA_TX_HDP(0), cpsw_txdesc_paddr(sc, sc->sc_txhead)); } } if (handled && sc->sc_txnext == sc->sc_txhead) ifp->if_timer = 0; if (handled) cpsw_start(ifp); return handled; } int cpsw_miscintr(void *arg) { struct cpsw_softc * const sc = arg; uint32_t miscstat; uint32_t dmastat; uint32_t stat; miscstat = cpsw_read_4(sc, CPSW_WR_C_MISC_STAT(0)); printf("%s %x FIRE\n", __func__, miscstat); #define CPSW_MISC_HOST_PEND __BIT32(2) #define CPSW_MISC_STAT_PEND __BIT32(3) if (ISSET(miscstat, CPSW_MISC_HOST_PEND)) { /* Host Error */ dmastat = cpsw_read_4(sc, CPSW_CPDMA_DMA_INTSTAT_MASKED); printf("CPSW_CPDMA_DMA_INTSTAT_MASKED %x\n", dmastat); printf("rxhead %02x\n", sc->sc_rxhead); stat = cpsw_read_4(sc, CPSW_CPDMA_DMASTATUS); printf("CPSW_CPDMA_DMASTATUS %x\n", stat); stat = cpsw_read_4(sc, CPSW_CPDMA_TX_HDP(0)); printf("CPSW_CPDMA_TX0_HDP %x\n", stat); stat = cpsw_read_4(sc, CPSW_CPDMA_TX_CP(0)); printf("CPSW_CPDMA_TX0_CP %x\n", stat); stat = cpsw_read_4(sc, CPSW_CPDMA_RX_HDP(0)); printf("CPSW_CPDMA_RX0_HDP %x\n", stat); stat = cpsw_read_4(sc, CPSW_CPDMA_RX_CP(0)); printf("CPSW_CPDMA_RX0_CP %x\n", stat); /* Debugger(); */ cpsw_write_4(sc, CPSW_CPDMA_DMA_INTMASK_CLEAR, dmastat); dmastat = cpsw_read_4(sc, CPSW_CPDMA_DMA_INTSTAT_MASKED); printf("CPSW_CPDMA_DMA_INTSTAT_MASKED %x\n", dmastat); } cpsw_write_4(sc, CPSW_CPDMA_CPDMA_EOI_VECTOR, CPSW_INTROFF_MISC); return 1; }