Current Path : /sys/dev/pcn/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/pcn/if_pcn.c |
/*- * Copyright (c) 2000 Berkeley Software Design, Inc. * Copyright (c) 1997, 1998, 1999, 2000 * Bill Paul <wpaul@osd.bsdi.com>. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD * 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 <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/dev/pcn/if_pcn.c 229093 2011-12-31 14:12:12Z hselasky $"); /* * AMD Am79c972 fast ethernet PCI NIC driver. Datasheets are available * from http://www.amd.com. * * The AMD PCnet/PCI controllers are more advanced and functional * versions of the venerable 7990 LANCE. The PCnet/PCI chips retain * backwards compatibility with the LANCE and thus can be made * to work with older LANCE drivers. This is in fact how the * PCnet/PCI chips were supported in FreeBSD originally. The trouble * is that the PCnet/PCI devices offer several performance enhancements * which can't be exploited in LANCE compatibility mode. Chief among * these enhancements is the ability to perform PCI DMA operations * using 32-bit addressing (which eliminates the need for ISA * bounce-buffering), and special receive buffer alignment (which * allows the receive handler to pass packets to the upper protocol * layers without copying on both the x86 and alpha platforms). */ #include <sys/param.h> #include <sys/systm.h> #include <sys/sockio.h> #include <sys/mbuf.h> #include <sys/malloc.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/socket.h> #include <net/if.h> #include <net/if_arp.h> #include <net/ethernet.h> #include <net/if_dl.h> #include <net/if_media.h> #include <net/if_types.h> #include <net/bpf.h> #include <vm/vm.h> /* for vtophys */ #include <vm/pmap.h> /* for vtophys */ #include <machine/bus.h> #include <machine/resource.h> #include <sys/bus.h> #include <sys/rman.h> #include <dev/mii/mii.h> #include <dev/mii/miivar.h> #include <dev/pci/pcireg.h> #include <dev/pci/pcivar.h> #define PCN_USEIOSPACE #include <dev/pcn/if_pcnreg.h> MODULE_DEPEND(pcn, pci, 1, 1, 1); MODULE_DEPEND(pcn, ether, 1, 1, 1); MODULE_DEPEND(pcn, miibus, 1, 1, 1); /* "device miibus" required. See GENERIC if you get errors here. */ #include "miibus_if.h" /* * Various supported device vendors/types and their names. */ static const struct pcn_type pcn_devs[] = { { PCN_VENDORID, PCN_DEVICEID_PCNET, "AMD PCnet/PCI 10/100BaseTX" }, { PCN_VENDORID, PCN_DEVICEID_HOME, "AMD PCnet/Home HomePNA" }, { 0, 0, NULL } }; static const struct pcn_chipid { u_int32_t id; const char *name; } pcn_chipid[] = { { Am79C971, "Am79C971" }, { Am79C972, "Am79C972" }, { Am79C973, "Am79C973" }, { Am79C978, "Am79C978" }, { Am79C975, "Am79C975" }, { Am79C976, "Am79C976" }, { 0, NULL }, }; static const char *pcn_chipid_name(u_int32_t); static u_int32_t pcn_chip_id(device_t); static const struct pcn_type *pcn_match(u_int16_t, u_int16_t); static u_int32_t pcn_csr_read(struct pcn_softc *, int); static u_int16_t pcn_csr_read16(struct pcn_softc *, int); static u_int16_t pcn_bcr_read16(struct pcn_softc *, int); static void pcn_csr_write(struct pcn_softc *, int, int); static u_int32_t pcn_bcr_read(struct pcn_softc *, int); static void pcn_bcr_write(struct pcn_softc *, int, int); static int pcn_probe(device_t); static int pcn_attach(device_t); static int pcn_detach(device_t); static int pcn_newbuf(struct pcn_softc *, int, struct mbuf *); static int pcn_encap(struct pcn_softc *, struct mbuf *, u_int32_t *); static void pcn_rxeof(struct pcn_softc *); static void pcn_txeof(struct pcn_softc *); static void pcn_intr(void *); static void pcn_tick(void *); static void pcn_start(struct ifnet *); static void pcn_start_locked(struct ifnet *); static int pcn_ioctl(struct ifnet *, u_long, caddr_t); static void pcn_init(void *); static void pcn_init_locked(struct pcn_softc *); static void pcn_stop(struct pcn_softc *); static void pcn_watchdog(struct pcn_softc *); static int pcn_shutdown(device_t); static int pcn_ifmedia_upd(struct ifnet *); static void pcn_ifmedia_sts(struct ifnet *, struct ifmediareq *); static int pcn_miibus_readreg(device_t, int, int); static int pcn_miibus_writereg(device_t, int, int, int); static void pcn_miibus_statchg(device_t); static void pcn_setfilt(struct ifnet *); static void pcn_setmulti(struct pcn_softc *); static void pcn_reset(struct pcn_softc *); static int pcn_list_rx_init(struct pcn_softc *); static int pcn_list_tx_init(struct pcn_softc *); #ifdef PCN_USEIOSPACE #define PCN_RES SYS_RES_IOPORT #define PCN_RID PCN_PCI_LOIO #else #define PCN_RES SYS_RES_MEMORY #define PCN_RID PCN_PCI_LOMEM #endif static device_method_t pcn_methods[] = { /* Device interface */ DEVMETHOD(device_probe, pcn_probe), DEVMETHOD(device_attach, pcn_attach), DEVMETHOD(device_detach, pcn_detach), DEVMETHOD(device_shutdown, pcn_shutdown), /* MII interface */ DEVMETHOD(miibus_readreg, pcn_miibus_readreg), DEVMETHOD(miibus_writereg, pcn_miibus_writereg), DEVMETHOD(miibus_statchg, pcn_miibus_statchg), DEVMETHOD_END }; static driver_t pcn_driver = { "pcn", pcn_methods, sizeof(struct pcn_softc) }; static devclass_t pcn_devclass; DRIVER_MODULE(pcn, pci, pcn_driver, pcn_devclass, 0, 0); DRIVER_MODULE(miibus, pcn, miibus_driver, miibus_devclass, 0, 0); #define PCN_CSR_SETBIT(sc, reg, x) \ pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) | (x)) #define PCN_CSR_CLRBIT(sc, reg, x) \ pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) & ~(x)) #define PCN_BCR_SETBIT(sc, reg, x) \ pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) | (x)) #define PCN_BCR_CLRBIT(sc, reg, x) \ pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) & ~(x)) static u_int32_t pcn_csr_read(sc, reg) struct pcn_softc *sc; int reg; { CSR_WRITE_4(sc, PCN_IO32_RAP, reg); return(CSR_READ_4(sc, PCN_IO32_RDP)); } static u_int16_t pcn_csr_read16(sc, reg) struct pcn_softc *sc; int reg; { CSR_WRITE_2(sc, PCN_IO16_RAP, reg); return(CSR_READ_2(sc, PCN_IO16_RDP)); } static void pcn_csr_write(sc, reg, val) struct pcn_softc *sc; int reg; int val; { CSR_WRITE_4(sc, PCN_IO32_RAP, reg); CSR_WRITE_4(sc, PCN_IO32_RDP, val); return; } static u_int32_t pcn_bcr_read(sc, reg) struct pcn_softc *sc; int reg; { CSR_WRITE_4(sc, PCN_IO32_RAP, reg); return(CSR_READ_4(sc, PCN_IO32_BDP)); } static u_int16_t pcn_bcr_read16(sc, reg) struct pcn_softc *sc; int reg; { CSR_WRITE_2(sc, PCN_IO16_RAP, reg); return(CSR_READ_2(sc, PCN_IO16_BDP)); } static void pcn_bcr_write(sc, reg, val) struct pcn_softc *sc; int reg; int val; { CSR_WRITE_4(sc, PCN_IO32_RAP, reg); CSR_WRITE_4(sc, PCN_IO32_BDP, val); return; } static int pcn_miibus_readreg(dev, phy, reg) device_t dev; int phy, reg; { struct pcn_softc *sc; int val; sc = device_get_softc(dev); /* * At least Am79C971 with DP83840A wedge when isolating the * external PHY so we can't allow multiple external PHYs. * There are cards that use Am79C971 with both the internal * and an external PHY though. * For internal PHYs it doesn't really matter whether we can * isolate the remaining internal and the external ones in * the PHY drivers as the internal PHYs have to be enabled * individually in PCN_BCR_PHYSEL, PCN_CSR_MODE, etc. * With Am79C97{3,5,8} we don't support switching beetween * the internal and external PHYs, yet, so we can't allow * multiple PHYs with these either. * Am79C97{2,6} actually only support external PHYs (not * connectable internal ones respond at the usual addresses, * which don't hurt if we let them show up on the bus) and * isolating them works. */ if (((sc->pcn_type == Am79C971 && phy != PCN_PHYAD_10BT) || sc->pcn_type == Am79C973 || sc->pcn_type == Am79C975 || sc->pcn_type == Am79C978) && sc->pcn_extphyaddr != -1 && phy != sc->pcn_extphyaddr) return(0); pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); val = pcn_bcr_read(sc, PCN_BCR_MIIDATA) & 0xFFFF; if (val == 0xFFFF) return(0); if (((sc->pcn_type == Am79C971 && phy != PCN_PHYAD_10BT) || sc->pcn_type == Am79C973 || sc->pcn_type == Am79C975 || sc->pcn_type == Am79C978) && sc->pcn_extphyaddr == -1) sc->pcn_extphyaddr = phy; return(val); } static int pcn_miibus_writereg(dev, phy, reg, data) device_t dev; int phy, reg, data; { struct pcn_softc *sc; sc = device_get_softc(dev); pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5)); pcn_bcr_write(sc, PCN_BCR_MIIDATA, data); return(0); } static void pcn_miibus_statchg(dev) device_t dev; { struct pcn_softc *sc; struct mii_data *mii; sc = device_get_softc(dev); mii = device_get_softc(sc->pcn_miibus); if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) { PCN_BCR_SETBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); } else { PCN_BCR_CLRBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN); } return; } static void pcn_setmulti(sc) struct pcn_softc *sc; { struct ifnet *ifp; struct ifmultiaddr *ifma; u_int32_t h, i; u_int16_t hashes[4] = { 0, 0, 0, 0 }; ifp = sc->pcn_ifp; PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { for (i = 0; i < 4; i++) pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0xFFFF); PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); return; } /* first, zot all the existing hash bits */ for (i = 0; i < 4; i++) pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0); /* now program new ones */ if_maddr_rlock(ifp); TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; h = ether_crc32_le(LLADDR((struct sockaddr_dl *) ifma->ifma_addr), ETHER_ADDR_LEN) >> 26; hashes[h >> 4] |= 1 << (h & 0xF); } if_maddr_runlock(ifp); for (i = 0; i < 4; i++) pcn_csr_write(sc, PCN_CSR_MAR0 + i, hashes[i]); PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); return; } static void pcn_reset(sc) struct pcn_softc *sc; { /* * Issue a reset by reading from the RESET register. * Note that we don't know if the chip is operating in * 16-bit or 32-bit mode at this point, so we attempt * to reset the chip both ways. If one fails, the other * will succeed. */ CSR_READ_2(sc, PCN_IO16_RESET); CSR_READ_4(sc, PCN_IO32_RESET); /* Wait a little while for the chip to get its brains in order. */ DELAY(1000); /* Select 32-bit (DWIO) mode */ CSR_WRITE_4(sc, PCN_IO32_RDP, 0); /* Select software style 3. */ pcn_bcr_write(sc, PCN_BCR_SSTYLE, PCN_SWSTYLE_PCNETPCI_BURST); return; } static const char * pcn_chipid_name(u_int32_t id) { const struct pcn_chipid *p; p = pcn_chipid; while (p->name) { if (id == p->id) return (p->name); p++; } return ("Unknown"); } static u_int32_t pcn_chip_id(device_t dev) { struct pcn_softc *sc; u_int32_t chip_id; sc = device_get_softc(dev); /* * Note: we can *NOT* put the chip into * 32-bit mode yet. The le(4) driver will only * work in 16-bit mode, and once the chip * goes into 32-bit mode, the only way to * get it out again is with a hardware reset. * So if pcn_probe() is called before the * le(4) driver's probe routine, the chip will * be locked into 32-bit operation and the * le(4) driver will be unable to attach to it. * Note II: if the chip happens to already * be in 32-bit mode, we still need to check * the chip ID, but first we have to detect * 32-bit mode using only 16-bit operations. * The safest way to do this is to read the * PCI subsystem ID from BCR23/24 and compare * that with the value read from PCI config * space. */ chip_id = pcn_bcr_read16(sc, PCN_BCR_PCISUBSYSID); chip_id <<= 16; chip_id |= pcn_bcr_read16(sc, PCN_BCR_PCISUBVENID); /* * Note III: the test for 0x10001000 is a hack to * pacify VMware, who's pseudo-PCnet interface is * broken. Reading the subsystem register from PCI * config space yields 0x00000000 while reading the * same value from I/O space yields 0x10001000. It's * not supposed to be that way. */ if (chip_id == pci_read_config(dev, PCIR_SUBVEND_0, 4) || chip_id == 0x10001000) { /* We're in 16-bit mode. */ chip_id = pcn_csr_read16(sc, PCN_CSR_CHIPID1); chip_id <<= 16; chip_id |= pcn_csr_read16(sc, PCN_CSR_CHIPID0); } else { /* We're in 32-bit mode. */ chip_id = pcn_csr_read(sc, PCN_CSR_CHIPID1); chip_id <<= 16; chip_id |= pcn_csr_read(sc, PCN_CSR_CHIPID0); } return (chip_id); } static const struct pcn_type * pcn_match(u_int16_t vid, u_int16_t did) { const struct pcn_type *t; t = pcn_devs; while (t->pcn_name != NULL) { if ((vid == t->pcn_vid) && (did == t->pcn_did)) return (t); t++; } return (NULL); } /* * Probe for an AMD chip. Check the PCI vendor and device * IDs against our list and return a device name if we find a match. */ static int pcn_probe(dev) device_t dev; { const struct pcn_type *t; struct pcn_softc *sc; int rid; u_int32_t chip_id; t = pcn_match(pci_get_vendor(dev), pci_get_device(dev)); if (t == NULL) return (ENXIO); sc = device_get_softc(dev); /* * Temporarily map the I/O space so we can read the chip ID register. */ rid = PCN_RID; sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE); if (sc->pcn_res == NULL) { device_printf(dev, "couldn't map ports/memory\n"); return(ENXIO); } sc->pcn_btag = rman_get_bustag(sc->pcn_res); sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); chip_id = pcn_chip_id(dev); bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res); switch((chip_id >> 12) & PART_MASK) { case Am79C971: case Am79C972: case Am79C973: case Am79C975: case Am79C976: case Am79C978: break; default: return(ENXIO); } device_set_desc(dev, t->pcn_name); return(BUS_PROBE_DEFAULT); } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ static int pcn_attach(dev) device_t dev; { u_int32_t eaddr[2]; struct pcn_softc *sc; struct mii_data *mii; struct mii_softc *miisc; struct ifnet *ifp; int error = 0, rid; sc = device_get_softc(dev); /* Initialize our mutex. */ mtx_init(&sc->pcn_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, MTX_DEF); /* * Map control/status registers. */ pci_enable_busmaster(dev); /* Retrieve the chip ID */ sc->pcn_type = (pcn_chip_id(dev) >> 12) & PART_MASK; device_printf(dev, "Chip ID %04x (%s)\n", sc->pcn_type, pcn_chipid_name(sc->pcn_type)); rid = PCN_RID; sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE); if (sc->pcn_res == NULL) { device_printf(dev, "couldn't map ports/memory\n"); error = ENXIO; goto fail; } sc->pcn_btag = rman_get_bustag(sc->pcn_res); sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res); /* Allocate interrupt */ rid = 0; sc->pcn_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE); if (sc->pcn_irq == NULL) { device_printf(dev, "couldn't map interrupt\n"); error = ENXIO; goto fail; } /* Reset the adapter. */ pcn_reset(sc); /* * Get station address from the EEPROM. */ eaddr[0] = CSR_READ_4(sc, PCN_IO32_APROM00); eaddr[1] = CSR_READ_4(sc, PCN_IO32_APROM01); callout_init_mtx(&sc->pcn_stat_callout, &sc->pcn_mtx, 0); sc->pcn_ldata = contigmalloc(sizeof(struct pcn_list_data), M_DEVBUF, M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); if (sc->pcn_ldata == NULL) { device_printf(dev, "no memory for list buffers!\n"); error = ENXIO; goto fail; } bzero(sc->pcn_ldata, sizeof(struct pcn_list_data)); ifp = sc->pcn_ifp = if_alloc(IFT_ETHER); if (ifp == NULL) { device_printf(dev, "can not if_alloc()\n"); error = ENOSPC; goto fail; } ifp->if_softc = sc; if_initname(ifp, device_get_name(dev), device_get_unit(dev)); ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = pcn_ioctl; ifp->if_start = pcn_start; ifp->if_init = pcn_init; ifp->if_snd.ifq_maxlen = PCN_TX_LIST_CNT - 1; /* * Do MII setup. * See the comment in pcn_miibus_readreg() for why we can't * universally pass MIIF_NOISOLATE here. */ sc->pcn_extphyaddr = -1; error = mii_attach(dev, &sc->pcn_miibus, ifp, pcn_ifmedia_upd, pcn_ifmedia_sts, BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0); if (error != 0) { device_printf(dev, "attaching PHYs failed\n"); goto fail; } /* * Record the media instances of internal PHYs, which map the * built-in interfaces to the MII, so we can set the active * PHY/port based on the currently selected media. */ sc->pcn_inst_10bt = -1; mii = device_get_softc(sc->pcn_miibus); LIST_FOREACH(miisc, &mii->mii_phys, mii_list) { switch (miisc->mii_phy) { case PCN_PHYAD_10BT: sc->pcn_inst_10bt = miisc->mii_inst; break; /* * XXX deal with the Am79C97{3,5} internal 100baseT * and the Am79C978 internal HomePNA PHYs. */ } } /* * Call MI attach routine. */ ether_ifattach(ifp, (u_int8_t *) eaddr); /* Hook interrupt last to avoid having to lock softc */ error = bus_setup_intr(dev, sc->pcn_irq, INTR_TYPE_NET | INTR_MPSAFE, NULL, pcn_intr, sc, &sc->pcn_intrhand); if (error) { device_printf(dev, "couldn't set up irq\n"); ether_ifdetach(ifp); goto fail; } fail: if (error) pcn_detach(dev); return(error); } /* * Shutdown hardware and free up resources. This can be called any * time after the mutex has been initialized. It is called in both * the error case in attach and the normal detach case so it needs * to be careful about only freeing resources that have actually been * allocated. */ static int pcn_detach(dev) device_t dev; { struct pcn_softc *sc; struct ifnet *ifp; sc = device_get_softc(dev); ifp = sc->pcn_ifp; KASSERT(mtx_initialized(&sc->pcn_mtx), ("pcn mutex not initialized")); /* These should only be active if attach succeeded */ if (device_is_attached(dev)) { PCN_LOCK(sc); pcn_reset(sc); pcn_stop(sc); PCN_UNLOCK(sc); callout_drain(&sc->pcn_stat_callout); ether_ifdetach(ifp); } if (sc->pcn_miibus) device_delete_child(dev, sc->pcn_miibus); bus_generic_detach(dev); if (sc->pcn_intrhand) bus_teardown_intr(dev, sc->pcn_irq, sc->pcn_intrhand); if (sc->pcn_irq) bus_release_resource(dev, SYS_RES_IRQ, 0, sc->pcn_irq); if (sc->pcn_res) bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res); if (ifp) if_free(ifp); if (sc->pcn_ldata) { contigfree(sc->pcn_ldata, sizeof(struct pcn_list_data), M_DEVBUF); } mtx_destroy(&sc->pcn_mtx); return(0); } /* * Initialize the transmit descriptors. */ static int pcn_list_tx_init(sc) struct pcn_softc *sc; { struct pcn_list_data *ld; struct pcn_ring_data *cd; int i; cd = &sc->pcn_cdata; ld = sc->pcn_ldata; for (i = 0; i < PCN_TX_LIST_CNT; i++) { cd->pcn_tx_chain[i] = NULL; ld->pcn_tx_list[i].pcn_tbaddr = 0; ld->pcn_tx_list[i].pcn_txctl = 0; ld->pcn_tx_list[i].pcn_txstat = 0; } cd->pcn_tx_prod = cd->pcn_tx_cons = cd->pcn_tx_cnt = 0; return(0); } /* * Initialize the RX descriptors and allocate mbufs for them. */ static int pcn_list_rx_init(sc) struct pcn_softc *sc; { struct pcn_ring_data *cd; int i; cd = &sc->pcn_cdata; for (i = 0; i < PCN_RX_LIST_CNT; i++) { if (pcn_newbuf(sc, i, NULL) == ENOBUFS) return(ENOBUFS); } cd->pcn_rx_prod = 0; return(0); } /* * Initialize an RX descriptor and attach an MBUF cluster. */ static int pcn_newbuf(sc, idx, m) struct pcn_softc *sc; int idx; struct mbuf *m; { struct mbuf *m_new = NULL; struct pcn_rx_desc *c; c = &sc->pcn_ldata->pcn_rx_list[idx]; if (m == NULL) { MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) return(ENOBUFS); MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { m_freem(m_new); return(ENOBUFS); } m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; } else { m_new = m; m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; m_new->m_data = m_new->m_ext.ext_buf; } m_adj(m_new, ETHER_ALIGN); sc->pcn_cdata.pcn_rx_chain[idx] = m_new; c->pcn_rbaddr = vtophys(mtod(m_new, caddr_t)); c->pcn_bufsz = (~(PCN_RXLEN) + 1) & PCN_RXLEN_BUFSZ; c->pcn_bufsz |= PCN_RXLEN_MBO; c->pcn_rxstat = PCN_RXSTAT_STP|PCN_RXSTAT_ENP|PCN_RXSTAT_OWN; return(0); } /* * A frame has been uploaded: pass the resulting mbuf chain up to * the higher level protocols. */ static void pcn_rxeof(sc) struct pcn_softc *sc; { struct mbuf *m; struct ifnet *ifp; struct pcn_rx_desc *cur_rx; int i; PCN_LOCK_ASSERT(sc); ifp = sc->pcn_ifp; i = sc->pcn_cdata.pcn_rx_prod; while(PCN_OWN_RXDESC(&sc->pcn_ldata->pcn_rx_list[i])) { cur_rx = &sc->pcn_ldata->pcn_rx_list[i]; m = sc->pcn_cdata.pcn_rx_chain[i]; sc->pcn_cdata.pcn_rx_chain[i] = NULL; /* * If an error occurs, update stats, clear the * status word and leave the mbuf cluster in place: * it should simply get re-used next time this descriptor * comes up in the ring. */ if (cur_rx->pcn_rxstat & PCN_RXSTAT_ERR) { ifp->if_ierrors++; pcn_newbuf(sc, i, m); PCN_INC(i, PCN_RX_LIST_CNT); continue; } if (pcn_newbuf(sc, i, NULL)) { /* Ran out of mbufs; recycle this one. */ pcn_newbuf(sc, i, m); ifp->if_ierrors++; PCN_INC(i, PCN_RX_LIST_CNT); continue; } PCN_INC(i, PCN_RX_LIST_CNT); /* No errors; receive the packet. */ ifp->if_ipackets++; m->m_len = m->m_pkthdr.len = cur_rx->pcn_rxlen - ETHER_CRC_LEN; m->m_pkthdr.rcvif = ifp; PCN_UNLOCK(sc); (*ifp->if_input)(ifp, m); PCN_LOCK(sc); } sc->pcn_cdata.pcn_rx_prod = i; return; } /* * A frame was downloaded to the chip. It's safe for us to clean up * the list buffers. */ static void pcn_txeof(sc) struct pcn_softc *sc; { struct pcn_tx_desc *cur_tx = NULL; struct ifnet *ifp; u_int32_t idx; ifp = sc->pcn_ifp; /* * Go through our tx list and free mbufs for those * frames that have been transmitted. */ idx = sc->pcn_cdata.pcn_tx_cons; while (idx != sc->pcn_cdata.pcn_tx_prod) { cur_tx = &sc->pcn_ldata->pcn_tx_list[idx]; if (!PCN_OWN_TXDESC(cur_tx)) break; if (!(cur_tx->pcn_txctl & PCN_TXCTL_ENP)) { sc->pcn_cdata.pcn_tx_cnt--; PCN_INC(idx, PCN_TX_LIST_CNT); continue; } if (cur_tx->pcn_txctl & PCN_TXCTL_ERR) { ifp->if_oerrors++; if (cur_tx->pcn_txstat & PCN_TXSTAT_EXDEF) ifp->if_collisions++; if (cur_tx->pcn_txstat & PCN_TXSTAT_RTRY) ifp->if_collisions++; } ifp->if_collisions += cur_tx->pcn_txstat & PCN_TXSTAT_TRC; ifp->if_opackets++; if (sc->pcn_cdata.pcn_tx_chain[idx] != NULL) { m_freem(sc->pcn_cdata.pcn_tx_chain[idx]); sc->pcn_cdata.pcn_tx_chain[idx] = NULL; } sc->pcn_cdata.pcn_tx_cnt--; PCN_INC(idx, PCN_TX_LIST_CNT); } if (idx != sc->pcn_cdata.pcn_tx_cons) { /* Some buffers have been freed. */ sc->pcn_cdata.pcn_tx_cons = idx; ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; } sc->pcn_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5; return; } static void pcn_tick(xsc) void *xsc; { struct pcn_softc *sc; struct mii_data *mii; struct ifnet *ifp; sc = xsc; ifp = sc->pcn_ifp; PCN_LOCK_ASSERT(sc); mii = device_get_softc(sc->pcn_miibus); mii_tick(mii); /* link just died */ if (sc->pcn_link & !(mii->mii_media_status & IFM_ACTIVE)) sc->pcn_link = 0; /* link just came up, restart */ if (!sc->pcn_link && mii->mii_media_status & IFM_ACTIVE && IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) { sc->pcn_link++; if (ifp->if_snd.ifq_head != NULL) pcn_start_locked(ifp); } if (sc->pcn_timer > 0 && --sc->pcn_timer == 0) pcn_watchdog(sc); callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc); return; } static void pcn_intr(arg) void *arg; { struct pcn_softc *sc; struct ifnet *ifp; u_int32_t status; sc = arg; ifp = sc->pcn_ifp; PCN_LOCK(sc); /* Suppress unwanted interrupts */ if (!(ifp->if_flags & IFF_UP)) { pcn_stop(sc); PCN_UNLOCK(sc); return; } CSR_WRITE_4(sc, PCN_IO32_RAP, PCN_CSR_CSR); while ((status = CSR_READ_4(sc, PCN_IO32_RDP)) & PCN_CSR_INTR) { CSR_WRITE_4(sc, PCN_IO32_RDP, status); if (status & PCN_CSR_RINT) pcn_rxeof(sc); if (status & PCN_CSR_TINT) pcn_txeof(sc); if (status & PCN_CSR_ERR) { pcn_init_locked(sc); break; } } if (ifp->if_snd.ifq_head != NULL) pcn_start_locked(ifp); PCN_UNLOCK(sc); return; } /* * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data * pointers to the fragment pointers. */ static int pcn_encap(sc, m_head, txidx) struct pcn_softc *sc; struct mbuf *m_head; u_int32_t *txidx; { struct pcn_tx_desc *f = NULL; struct mbuf *m; int frag, cur, cnt = 0; /* * Start packing the mbufs in this chain into * the fragment pointers. Stop when we run out * of fragments or hit the end of the mbuf chain. */ m = m_head; cur = frag = *txidx; for (m = m_head; m != NULL; m = m->m_next) { if (m->m_len == 0) continue; if ((PCN_TX_LIST_CNT - (sc->pcn_cdata.pcn_tx_cnt + cnt)) < 2) return(ENOBUFS); f = &sc->pcn_ldata->pcn_tx_list[frag]; f->pcn_txctl = (~(m->m_len) + 1) & PCN_TXCTL_BUFSZ; f->pcn_txctl |= PCN_TXCTL_MBO; f->pcn_tbaddr = vtophys(mtod(m, vm_offset_t)); if (cnt == 0) f->pcn_txctl |= PCN_TXCTL_STP; else f->pcn_txctl |= PCN_TXCTL_OWN; cur = frag; PCN_INC(frag, PCN_TX_LIST_CNT); cnt++; } if (m != NULL) return(ENOBUFS); sc->pcn_cdata.pcn_tx_chain[cur] = m_head; sc->pcn_ldata->pcn_tx_list[cur].pcn_txctl |= PCN_TXCTL_ENP|PCN_TXCTL_ADD_FCS|PCN_TXCTL_MORE_LTINT; sc->pcn_ldata->pcn_tx_list[*txidx].pcn_txctl |= PCN_TXCTL_OWN; sc->pcn_cdata.pcn_tx_cnt += cnt; *txidx = frag; return(0); } /* * Main transmit routine. To avoid having to do mbuf copies, we put pointers * to the mbuf data regions directly in the transmit lists. We also save a * copy of the pointers since the transmit list fragment pointers are * physical addresses. */ static void pcn_start(ifp) struct ifnet *ifp; { struct pcn_softc *sc; sc = ifp->if_softc; PCN_LOCK(sc); pcn_start_locked(ifp); PCN_UNLOCK(sc); } static void pcn_start_locked(ifp) struct ifnet *ifp; { struct pcn_softc *sc; struct mbuf *m_head = NULL; u_int32_t idx; sc = ifp->if_softc; PCN_LOCK_ASSERT(sc); if (!sc->pcn_link) return; idx = sc->pcn_cdata.pcn_tx_prod; if (ifp->if_drv_flags & IFF_DRV_OACTIVE) return; while(sc->pcn_cdata.pcn_tx_chain[idx] == NULL) { IF_DEQUEUE(&ifp->if_snd, m_head); if (m_head == NULL) break; if (pcn_encap(sc, m_head, &idx)) { IF_PREPEND(&ifp->if_snd, m_head); ifp->if_drv_flags |= IFF_DRV_OACTIVE; break; } /* * If there's a BPF listener, bounce a copy of this frame * to him. */ BPF_MTAP(ifp, m_head); } /* Transmit */ sc->pcn_cdata.pcn_tx_prod = idx; pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_TX|PCN_CSR_INTEN); /* * Set a timeout in case the chip goes out to lunch. */ sc->pcn_timer = 5; return; } static void pcn_setfilt(ifp) struct ifnet *ifp; { struct pcn_softc *sc; sc = ifp->if_softc; /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) { PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); } else { PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC); } /* Set the capture broadcast bit to capture broadcast frames. */ if (ifp->if_flags & IFF_BROADCAST) { PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); } else { PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD); } return; } static void pcn_init(xsc) void *xsc; { struct pcn_softc *sc = xsc; PCN_LOCK(sc); pcn_init_locked(sc); PCN_UNLOCK(sc); } static void pcn_init_locked(sc) struct pcn_softc *sc; { struct ifnet *ifp = sc->pcn_ifp; struct mii_data *mii = NULL; struct ifmedia_entry *ife; PCN_LOCK_ASSERT(sc); /* * Cancel pending I/O and free all RX/TX buffers. */ pcn_stop(sc); pcn_reset(sc); mii = device_get_softc(sc->pcn_miibus); ife = mii->mii_media.ifm_cur; /* Set MAC address */ pcn_csr_write(sc, PCN_CSR_PAR0, ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[0]); pcn_csr_write(sc, PCN_CSR_PAR1, ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[1]); pcn_csr_write(sc, PCN_CSR_PAR2, ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[2]); /* Init circular RX list. */ if (pcn_list_rx_init(sc) == ENOBUFS) { if_printf(ifp, "initialization failed: no " "memory for rx buffers\n"); pcn_stop(sc); return; } /* * Init tx descriptors. */ pcn_list_tx_init(sc); /* Clear PCN_MISC_ASEL so we can set the port via PCN_CSR_MODE. */ PCN_BCR_CLRBIT(sc, PCN_BCR_MISCCFG, PCN_MISC_ASEL); /* * Set up the port based on the currently selected media. * For Am79C978 we've to unconditionally set PCN_PORT_MII and * set the PHY in PCN_BCR_PHYSEL instead. */ if (sc->pcn_type != Am79C978 && IFM_INST(ife->ifm_media) == sc->pcn_inst_10bt) pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_10BASET); else pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_MII); /* Set up RX filter. */ pcn_setfilt(ifp); /* * Load the multicast filter. */ pcn_setmulti(sc); /* * Load the addresses of the RX and TX lists. */ pcn_csr_write(sc, PCN_CSR_RXADDR0, vtophys(&sc->pcn_ldata->pcn_rx_list[0]) & 0xFFFF); pcn_csr_write(sc, PCN_CSR_RXADDR1, (vtophys(&sc->pcn_ldata->pcn_rx_list[0]) >> 16) & 0xFFFF); pcn_csr_write(sc, PCN_CSR_TXADDR0, vtophys(&sc->pcn_ldata->pcn_tx_list[0]) & 0xFFFF); pcn_csr_write(sc, PCN_CSR_TXADDR1, (vtophys(&sc->pcn_ldata->pcn_tx_list[0]) >> 16) & 0xFFFF); /* Set the RX and TX ring sizes. */ pcn_csr_write(sc, PCN_CSR_RXRINGLEN, (~PCN_RX_LIST_CNT) + 1); pcn_csr_write(sc, PCN_CSR_TXRINGLEN, (~PCN_TX_LIST_CNT) + 1); /* We're not using the initialization block. */ pcn_csr_write(sc, PCN_CSR_IAB1, 0); /* Enable fast suspend mode. */ PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL2, PCN_EXTCTL2_FASTSPNDE); /* * Enable burst read and write. Also set the no underflow * bit. This will avoid transmit underruns in certain * conditions while still providing decent performance. */ PCN_BCR_SETBIT(sc, PCN_BCR_BUSCTL, PCN_BUSCTL_NOUFLOW| PCN_BUSCTL_BREAD|PCN_BUSCTL_BWRITE); /* Enable graceful recovery from underflow. */ PCN_CSR_SETBIT(sc, PCN_CSR_IMR, PCN_IMR_DXSUFLO); /* Enable auto-padding of short TX frames. */ PCN_CSR_SETBIT(sc, PCN_CSR_TFEAT, PCN_TFEAT_PAD_TX); /* Disable MII autoneg (we handle this ourselves). */ PCN_BCR_SETBIT(sc, PCN_BCR_MIICTL, PCN_MIICTL_DANAS); if (sc->pcn_type == Am79C978) /* XXX support other PHYs? */ pcn_bcr_write(sc, PCN_BCR_PHYSEL, PCN_PHYSEL_PCNET|PCN_PHY_HOMEPNA); /* Enable interrupts and start the controller running. */ pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START); mii_mediachg(mii); ifp->if_drv_flags |= IFF_DRV_RUNNING; ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc); return; } /* * Set media options. */ static int pcn_ifmedia_upd(ifp) struct ifnet *ifp; { struct pcn_softc *sc; sc = ifp->if_softc; PCN_LOCK(sc); /* * At least Am79C971 with DP83840A can wedge when switching * from the internal 10baseT PHY to the external PHY without * issuing pcn_reset(). For setting the port in PCN_CSR_MODE * the PCnet chip has to be powered down or stopped anyway * and although documented otherwise it doesn't take effect * until the next initialization. */ sc->pcn_link = 0; pcn_stop(sc); pcn_reset(sc); pcn_init_locked(sc); if (ifp->if_snd.ifq_head != NULL) pcn_start_locked(ifp); PCN_UNLOCK(sc); return(0); } /* * Report current media status. */ static void pcn_ifmedia_sts(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct pcn_softc *sc; struct mii_data *mii; sc = ifp->if_softc; mii = device_get_softc(sc->pcn_miibus); PCN_LOCK(sc); mii_pollstat(mii); ifmr->ifm_active = mii->mii_media_active; ifmr->ifm_status = mii->mii_media_status; PCN_UNLOCK(sc); return; } static int pcn_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { struct pcn_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; struct mii_data *mii = NULL; int error = 0; switch(command) { case SIOCSIFFLAGS: PCN_LOCK(sc); if (ifp->if_flags & IFF_UP) { if (ifp->if_drv_flags & IFF_DRV_RUNNING && ifp->if_flags & IFF_PROMISC && !(sc->pcn_if_flags & IFF_PROMISC)) { PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); pcn_setfilt(ifp); PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START); } else if (ifp->if_drv_flags & IFF_DRV_RUNNING && !(ifp->if_flags & IFF_PROMISC) && sc->pcn_if_flags & IFF_PROMISC) { PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); pcn_setfilt(ifp); PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND); pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START); } else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) pcn_init_locked(sc); } else { if (ifp->if_drv_flags & IFF_DRV_RUNNING) pcn_stop(sc); } sc->pcn_if_flags = ifp->if_flags; PCN_UNLOCK(sc); error = 0; break; case SIOCADDMULTI: case SIOCDELMULTI: PCN_LOCK(sc); pcn_setmulti(sc); PCN_UNLOCK(sc); error = 0; break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: mii = device_get_softc(sc->pcn_miibus); error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); break; default: error = ether_ioctl(ifp, command, data); break; } return(error); } static void pcn_watchdog(struct pcn_softc *sc) { struct ifnet *ifp; PCN_LOCK_ASSERT(sc); ifp = sc->pcn_ifp; ifp->if_oerrors++; if_printf(ifp, "watchdog timeout\n"); pcn_stop(sc); pcn_reset(sc); pcn_init_locked(sc); if (ifp->if_snd.ifq_head != NULL) pcn_start_locked(ifp); } /* * Stop the adapter and free any mbufs allocated to the * RX and TX lists. */ static void pcn_stop(struct pcn_softc *sc) { register int i; struct ifnet *ifp; PCN_LOCK_ASSERT(sc); ifp = sc->pcn_ifp; sc->pcn_timer = 0; callout_stop(&sc->pcn_stat_callout); /* Turn off interrupts */ PCN_CSR_CLRBIT(sc, PCN_CSR_CSR, PCN_CSR_INTEN); /* Stop adapter */ PCN_CSR_SETBIT(sc, PCN_CSR_CSR, PCN_CSR_STOP); sc->pcn_link = 0; /* * Free data in the RX lists. */ for (i = 0; i < PCN_RX_LIST_CNT; i++) { if (sc->pcn_cdata.pcn_rx_chain[i] != NULL) { m_freem(sc->pcn_cdata.pcn_rx_chain[i]); sc->pcn_cdata.pcn_rx_chain[i] = NULL; } } bzero((char *)&sc->pcn_ldata->pcn_rx_list, sizeof(sc->pcn_ldata->pcn_rx_list)); /* * Free the TX list buffers. */ for (i = 0; i < PCN_TX_LIST_CNT; i++) { if (sc->pcn_cdata.pcn_tx_chain[i] != NULL) { m_freem(sc->pcn_cdata.pcn_tx_chain[i]); sc->pcn_cdata.pcn_tx_chain[i] = NULL; } } bzero((char *)&sc->pcn_ldata->pcn_tx_list, sizeof(sc->pcn_ldata->pcn_tx_list)); ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); return; } /* * Stop all chip I/O so that the kernel's probe routines don't * get confused by errant DMAs when rebooting. */ static int pcn_shutdown(device_t dev) { struct pcn_softc *sc; sc = device_get_softc(dev); PCN_LOCK(sc); pcn_reset(sc); pcn_stop(sc); PCN_UNLOCK(sc); return 0; }