/* $NetBSD: if_rtk_pci.c,v 1.4 2000/12/28 22:59:13 sommerfeld Exp $ */ /* * Copyright (c) 1997, 1998 * Bill Paul . 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. * * FreeBSD Id: if_rl.c,v 1.17 1999/06/19 20:17:37 wpaul Exp */ /* * RealTek 8129/8139 PCI NIC driver * * Supports several extremely cheap PCI 10/100 adapters based on * the RealTek chipset. Datasheets can be obtained from * www.realtek.com.tw. * * Written by Bill Paul * Electrical Engineering Department * Columbia University, New York City */ /* * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is * probably the worst PCI ethernet controller ever made, with the possible * exception of the FEAST chip made by SMC. The 8139 supports bus-master * DMA, but it has a terrible interface that nullifies any performance * gains that bus-master DMA usually offers. * * For transmission, the chip offers a series of four TX descriptor * registers. Each transmit frame must be in a contiguous buffer, aligned * on a longword (32-bit) boundary. This means we almost always have to * do mbuf copies in order to transmit a frame, except in the unlikely * case where a) the packet fits into a single mbuf, and b) the packet * is 32-bit aligned within the mbuf's data area. The presence of only * four descriptor registers means that we can never have more than four * packets queued for transmission at any one time. * * Reception is not much better. The driver has to allocate a single large * buffer area (up to 64K in size) into which the chip will DMA received * frames. Because we don't know where within this region received packets * will begin or end, we have no choice but to copy data from the buffer * area into mbufs in order to pass the packets up to the higher protocol * levels. * * It's impossible given this rotten design to really achieve decent * performance at 100Mbps, unless you happen to have a 400Mhz PII or * some equally overmuscled CPU to drive it. * * On the bright side, the 8139 does have a built-in PHY, although * rather than using an MDIO serial interface like most other NICs, the * PHY registers are directly accessible through the 8139's register * space. The 8139 supports autonegotiation, as well as a 64-bit multicast * filter. * * The 8129 chip is an older version of the 8139 that uses an external PHY * chip. The 8129 has a serial MDIO interface for accessing the MII where * the 8139 lets you directly access the on-board PHY registers. We need * to select which interface to use depending on the chip type. */ #include "opt_inet.h" #include "opt_ns.h" #include "bpfilter.h" #include "rnd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #ifdef NS #include #include #endif #if NBPFILTER > 0 #include #endif #if NRND > 0 #include #endif #include #include #include #include #include #include /* * Default to using PIO access for this driver. On SMP systems, * there appear to be problems with memory mapped mode: it looks like * doing too many memory mapped access back to back in rapid succession * can hang the bus. I'm inclined to blame this on crummy design/construction * on the part of RealTek. Memory mapped mode does appear to work on * uniprocessor systems though. */ #define RTK_USEIOSPACE #include #include struct rtk_pci_softc { struct rtk_softc sc_rtk; /* real rtk softc */ /* PCI-specific goo.*/ void *sc_ih; pci_chipset_tag_t sc_pc; /* PCI chipset */ pcitag_t sc_pcitag; /* PCI tag */ }; static const struct rtk_type rtk_pci_devs[] = { { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8129, "RealTek 8129 10/100BaseTX", RTK_8129 }, { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139, "RealTek 8139 10/100BaseTX", RTK_8139 }, { PCI_VENDOR_ACCTON, PCI_PRODUCT_ACCTON_MPX5030, "Accton MPX 5030/5038 10/100BaseTX", RTK_8139 }, { PCI_VENDOR_DELTA, PCI_PRODUCT_DELTA_8139, "Delta Electronics 8139 10/100BaseTX", RTK_8139 }, { PCI_VENDOR_ADDTRON, PCI_PRODUCT_ADDTRON_8139, "Addtron Technology 8139 10/100BaseTX", RTK_8139 }, { 0, 0, NULL, 0 } }; const struct rtk_type *rtk_pci_lookup __P((const struct pci_attach_args *)); int rtk_pci_match __P((struct device *, struct cfdata *, void *)); void rtk_pci_attach __P((struct device *, struct device *, void *)); struct cfattach rtk_pci_ca = { sizeof(struct rtk_pci_softc), rtk_pci_match, rtk_pci_attach, }; const struct rtk_type * rtk_pci_lookup(pa) const struct pci_attach_args *pa; { const struct rtk_type *t; for (t = rtk_pci_devs; t->rtk_name != NULL; t++){ if (PCI_VENDOR(pa->pa_id) == t->rtk_vid && PCI_PRODUCT(pa->pa_id) == t->rtk_did) { return (t); } } return (NULL); } int rtk_pci_match(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct pci_attach_args *pa = aux; if (rtk_pci_lookup(pa) != NULL) return (1); return (0); } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ void rtk_pci_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct rtk_pci_softc *psc = (struct rtk_pci_softc *)self; struct rtk_softc *sc = &psc->sc_rtk; pcireg_t command; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; pci_intr_handle_t ih; const char *intrstr = NULL; const struct rtk_type *t; int pmreg; psc->sc_pc = pa->pa_pc; psc->sc_pcitag = pa->pa_tag; t = rtk_pci_lookup(pa); if (t == NULL) { printf("\n"); panic("rtk_pci_attach: impossible"); } printf(": %s\n", t->rtk_name); /* * Handle power management nonsense. */ if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pmreg, 0)) { command = pci_conf_read(pc, pa->pa_tag, pmreg + 4); if (command & RTK_PSTATE_MASK) { pcireg_t iobase, membase, irq; /* Save important PCI config data. */ iobase = pci_conf_read(pc, pa->pa_tag, RTK_PCI_LOIO); membase = pci_conf_read(pc, pa->pa_tag, RTK_PCI_LOMEM); irq = pci_conf_read(pc, pa->pa_tag, PCI_PRODUCT_DELTA_8139); /* Reset the power state. */ printf("%s: chip is is in D%d power mode " "-- setting to D0\n", sc->sc_dev.dv_xname, command & RTK_PSTATE_MASK); command &= 0xFFFFFFFC; pci_conf_write(pc, pa->pa_tag, pmreg + 4, command); /* Restore PCI config data. */ pci_conf_write(pc, pa->pa_tag, RTK_PCI_LOIO, iobase); pci_conf_write(pc, pa->pa_tag, RTK_PCI_LOMEM, membase); pci_conf_write(pc, pa->pa_tag, PCI_PRODUCT_DELTA_8139, irq); } } /* * Map control/status registers. */ #ifdef RTK_USEIOSPACE if (pci_mapreg_map(pa, RTK_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0, &sc->rtk_btag, &sc->rtk_bhandle, NULL, NULL)) { printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); return; } #else if (pci_mapreg_map(pa, RTK_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0, &sc->rtk_btag, &sc->rtk_bhandle, NULL, NULL)) { printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); return; } #endif /* Allocate interrupt */ if (pci_intr_map(pa, &ih)) { printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); return; } intrstr = pci_intr_string(pc, ih); psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, rtk_intr, sc); if (psc->sc_ih == NULL) { printf("%s: couldn't establish interrupt", sc->sc_dev.dv_xname); if (intrstr != NULL) printf(" at %s", intrstr); printf("\n"); return; } sc->rtk_type = t->rtk_type; printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr); sc->sc_dmat = pa->pa_dmat; rtk_attach(sc); }