ad4f426ef6
could get an interrupt after we free the ifp, and the interrupt handler depended on the ifp being still alive, this could, in theory, cause a crash. Eliminate this possibility by moving the if_free to after the bus_teardown_intr() call.
503 lines
13 KiB
C
503 lines
13 KiB
C
/* $NetBSD: if_en_pci.c,v 1.1 1996/06/22 02:00:31 chuck Exp $ */
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/*-
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* Copyright (c) 1996 Charles D. Cranor and Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor and
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* Washington University.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* i f _ e n _ p c i . c
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*
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* author: Chuck Cranor <chuck@ccrc.wustl.edu>
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* started: spring, 1996.
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*
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* FreeBSD PCI glue for the eni155p card.
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* thanks to Matt Thomas for figuring out FreeBSD vs NetBSD vs etc.. diffs.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/condvar.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <vm/uma.h>
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#include <net/if.h>
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#include <net/if_atm.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/utopia/utopia.h>
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#include <dev/en/midwayreg.h>
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#include <dev/en/midwayvar.h>
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MODULE_DEPEND(en, pci, 1, 1, 1);
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MODULE_DEPEND(en, atm, 1, 1, 1);
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MODULE_DEPEND(en, utopia, 1, 1, 1);
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/*
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* local structures
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*/
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struct en_pci_softc {
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/* bus independent stuff */
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struct en_softc esc; /* includes "device" structure */
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/* freebsd newbus glue */
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struct resource *res; /* resource descriptor for registers */
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struct resource *irq; /* resource descriptor for interrupt */
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void *ih; /* interrupt handle */
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};
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static void eni_get_macaddr(device_t, struct en_pci_softc *);
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static void adp_get_macaddr(struct en_pci_softc *);
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/*
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* address of config base memory address register in PCI config space
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* (this is card specific)
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*/
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#define PCI_CBMA 0x10
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/*
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* tonga (pci bridge). ENI cards only!
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*/
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#define EN_TONGA 0x60 /* PCI config addr of tonga reg */
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#define TONGA_SWAP_DMA 0x80 /* endian swap control */
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#define TONGA_SWAP_BYTE 0x40
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#define TONGA_SWAP_WORD 0x20
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#define TONGA_READ_MULT 0x00
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#define TONGA_READ_MEM 0x04
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#define TONGA_READ_IVAN 0x08
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#define TONGA_READ_KEN 0x0C
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/*
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* adaptec pci bridge. ADP cards only!
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*/
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#define ADP_PCIREG 0x050040 /* PCI control register */
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#define ADP_PCIREG_RESET 0x1 /* reset card */
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#define ADP_PCIREG_IENABLE 0x2 /* interrupt enable */
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#define ADP_PCIREG_SWAP_WORD 0x4 /* swap byte on slave access */
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#define ADP_PCIREG_SWAP_DMA 0x8 /* swap byte on DMA */
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#define PCI_VENDOR_EFFICIENTNETS 0x111a /* Efficent Networks */
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#define PCI_PRODUCT_EFFICIENTNETS_ENI155PF 0x0000 /* ENI-155P ATM */
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#define PCI_PRODUCT_EFFICIENTNETS_ENI155PA 0x0002 /* ENI-155P ATM */
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#define PCI_VENDOR_ADP 0x9004 /* adaptec */
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#define PCI_PRODUCT_ADP_AIC5900 0x5900
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#define PCI_PRODUCT_ADP_AIC5905 0x5905
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#define PCI_VENDOR(x) ((x) & 0xFFFF)
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#define PCI_CHIPID(x) (((x) >> 16) & 0xFFFF)
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/*
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* bus specific reset function [ADP only!]
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*/
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static void
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adp_busreset(void *v)
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{
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struct en_softc *sc = (struct en_softc *)v;
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uint32_t dummy;
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bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG,
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ADP_PCIREG_RESET);
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DELAY(1000); /* let it reset */
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dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
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bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG,
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(ADP_PCIREG_SWAP_DMA | ADP_PCIREG_IENABLE));
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dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
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if ((dummy & (ADP_PCIREG_SWAP_WORD | ADP_PCIREG_SWAP_DMA)) !=
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ADP_PCIREG_SWAP_DMA)
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if_printf(sc->ifp, "adp_busreset: Adaptec ATM did "
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"NOT reset!\n");
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}
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/***********************************************************************/
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/*
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* autoconfig stuff
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*/
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static int
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en_pci_probe(device_t dev)
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{
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switch (pci_get_vendor(dev)) {
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case PCI_VENDOR_EFFICIENTNETS:
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switch (pci_get_device(dev)) {
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case PCI_PRODUCT_EFFICIENTNETS_ENI155PF:
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case PCI_PRODUCT_EFFICIENTNETS_ENI155PA:
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device_set_desc(dev, "Efficient Networks ENI-155p");
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return (BUS_PROBE_DEFAULT);
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}
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break;
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case PCI_VENDOR_ADP:
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switch (pci_get_device(dev)) {
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case PCI_PRODUCT_ADP_AIC5900:
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case PCI_PRODUCT_ADP_AIC5905:
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device_set_desc(dev, "Adaptec 155 ATM");
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return (BUS_PROBE_DEFAULT);
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}
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break;
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}
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return (ENXIO);
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}
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static int
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en_pci_attach(device_t dev)
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{
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struct en_softc *sc;
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struct en_pci_softc *scp;
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u_long val;
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int rid, error = 0;
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sc = device_get_softc(dev);
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scp = (struct en_pci_softc *)sc;
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sc->ifp = if_alloc(IFT_ATM);
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if (sc->ifp == NULL) {
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device_printf(dev, "can not if_alloc()\n");
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error = ENOSPC;
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goto fail;
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}
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if_initname(sc->ifp, device_get_name(dev),
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device_get_unit(dev));
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/*
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* Enable bus mastering.
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*/
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val = pci_read_config(dev, PCIR_COMMAND, 2);
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val |= (PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN);
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pci_write_config(dev, PCIR_COMMAND, val, 2);
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/*
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* Map control/status registers.
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*/
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rid = PCI_CBMA;
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scp->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (scp->res == NULL) {
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device_printf(dev, "could not map memory\n");
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if_free(sc->ifp);
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error = ENXIO;
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goto fail;
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}
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sc->dev = dev;
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sc->en_memt = rman_get_bustag(scp->res);
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sc->en_base = rman_get_bushandle(scp->res);
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/*
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* Allocate our interrupt.
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*/
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rid = 0;
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scp->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (scp->irq == NULL) {
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device_printf(dev, "could not map interrupt\n");
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bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
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if_free(sc->ifp);
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error = ENXIO;
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goto fail;
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}
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sc->ipl = 1; /* XXX (required to enable interrupt on midway) */
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/* figure out if we are an adaptec card or not */
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sc->is_adaptec = (pci_get_vendor(dev) == PCI_VENDOR_ADP) ? 1 : 0;
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/*
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* set up pci bridge
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*/
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if (sc->is_adaptec) {
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adp_get_macaddr(scp);
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sc->en_busreset = adp_busreset;
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adp_busreset(sc);
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} else {
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eni_get_macaddr(dev, scp);
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sc->en_busreset = NULL;
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pci_write_config(dev, EN_TONGA, TONGA_SWAP_DMA | TONGA_READ_IVAN, 4);
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}
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/*
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* Common attach stuff
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*/
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if ((error = en_attach(sc)) != 0) {
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device_printf(dev, "attach failed\n");
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bus_teardown_intr(dev, scp->irq, scp->ih);
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bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
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bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
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if_free(sc->ifp);
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goto fail;
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}
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/*
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* Do the interrupt SETUP last just before returning
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*/
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error = bus_setup_intr(dev, scp->irq, INTR_TYPE_NET,
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en_intr, sc, &scp->ih);
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if (error) {
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en_reset(sc);
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atm_ifdetach(sc->ifp);
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if_free(sc->ifp);
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device_printf(dev, "could not setup irq\n");
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bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
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bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
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en_destroy(sc);
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if_free(sc->ifp);
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goto fail;
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}
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return (0);
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fail:
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return (error);
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}
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/*
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* Detach the adapter
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*/
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static int
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en_pci_detach(device_t dev)
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{
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struct en_softc *sc = device_get_softc(dev);
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struct en_pci_softc *scp = (struct en_pci_softc *)sc;
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/*
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* Stop DMA and drop transmit queue.
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*/
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if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING)) {
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if_printf(sc->ifp, "still running\n");
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sc->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
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}
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/*
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* Close down routes etc.
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*/
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en_reset(sc);
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atm_ifdetach(sc->ifp);
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/*
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* Deallocate resources.
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*/
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bus_teardown_intr(dev, scp->irq, scp->ih);
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bus_release_resource(dev, SYS_RES_IRQ, 0, scp->irq);
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bus_release_resource(dev, SYS_RES_MEMORY, PCI_CBMA, scp->res);
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/*
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* Free all the driver internal resources
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*/
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en_destroy(sc);
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if_free(sc->ifp);
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return (0);
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}
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static int
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en_pci_shutdown(device_t dev)
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{
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struct en_pci_softc *psc = device_get_softc(dev);
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en_reset(&psc->esc);
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DELAY(10); /* is this necessary? */
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return (0);
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}
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/*
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* Get the MAC address from an Adaptec board. No idea how to get
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* serial number or other stuff, because I have no documentation for that
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* card.
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*/
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static void
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adp_get_macaddr(struct en_pci_softc *scp)
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{
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struct en_softc * sc = (struct en_softc *)scp;
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int lcv;
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for (lcv = 0; lcv < sizeof(IFP2IFATM(sc->ifp)->mib.esi); lcv++)
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IFP2IFATM(sc->ifp)->mib.esi[lcv] = bus_space_read_1(sc->en_memt,
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sc->en_base, MID_ADPMACOFF + lcv);
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}
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/*
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* Read station (MAC) address from serial EEPROM.
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* derived from linux drivers/atm/eni.c by Werner Almesberger, EPFL LRC.
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*/
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#define EN_PROM_MAGIC 0x0c
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#define EN_PROM_DATA 0x02
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#define EN_PROM_CLK 0x01
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#define EN_ESI 64
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#define EN_SERIAL 112
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/*
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* Read a byte from the given address in the EEPROM
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*/
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static uint8_t
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eni_get_byte(device_t dev, uint32_t *data, u_int address)
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{
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int j;
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uint8_t tmp;
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address = (address << 1) + 1;
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/* start operation */
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data &= ~EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data &= ~EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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/* send address with serial line */
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for ( j = 7 ; j >= 0 ; j --) {
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*data = ((address >> j) & 1) ? (*data | EN_PROM_DATA) :
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(*data & ~EN_PROM_DATA);
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data &= ~EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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}
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/* get ack */
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data = pci_read_config(dev, EN_TONGA, 4);
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*data &= ~EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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tmp = 0;
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for ( j = 7 ; j >= 0 ; j --) {
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tmp <<= 1;
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data = pci_read_config(dev, EN_TONGA, 4);
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if(*data & EN_PROM_DATA) tmp |= 1;
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*data &= ~EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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}
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/* get ack */
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data = pci_read_config(dev, EN_TONGA, 4);
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*data &= ~EN_PROM_CLK ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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*data |= EN_PROM_DATA ;
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pci_write_config(dev, EN_TONGA, *data, 4);
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return (tmp);
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}
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/*
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* Get MAC address and other stuff from the EEPROM
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*/
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static void
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eni_get_macaddr(device_t dev, struct en_pci_softc *scp)
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|
{
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struct en_softc * sc = (struct en_softc *)scp;
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int i;
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uint32_t data, t_data;
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t_data = pci_read_config(dev, EN_TONGA, 4) & 0xffffff00;
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data = EN_PROM_MAGIC | EN_PROM_DATA | EN_PROM_CLK;
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pci_write_config(dev, EN_TONGA, data, 4);
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for (i = 0; i < sizeof(IFP2IFATM(sc->ifp)->mib.esi); i ++)
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IFP2IFATM(sc->ifp)->mib.esi[i] = eni_get_byte(dev, &data, i + EN_ESI);
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IFP2IFATM(sc->ifp)->mib.serial = 0;
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for (i = 0; i < 4; i++) {
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IFP2IFATM(sc->ifp)->mib.serial <<= 8;
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IFP2IFATM(sc->ifp)->mib.serial |= eni_get_byte(dev, &data, i + EN_SERIAL);
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}
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/* stop operation */
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data &= ~EN_PROM_DATA;
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pci_write_config(dev, EN_TONGA, data, 4);
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data |= EN_PROM_CLK;
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pci_write_config(dev, EN_TONGA, data, 4);
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data |= EN_PROM_DATA;
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pci_write_config(dev, EN_TONGA, data, 4);
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pci_write_config(dev, EN_TONGA, t_data, 4);
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}
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/*
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* Driver infrastructure
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*/
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static device_method_t en_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, en_pci_probe),
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DEVMETHOD(device_attach, en_pci_attach),
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DEVMETHOD(device_detach, en_pci_detach),
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DEVMETHOD(device_shutdown, en_pci_shutdown),
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{ 0, 0 }
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};
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static driver_t en_driver = {
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"en",
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en_methods,
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sizeof(struct en_pci_softc),
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};
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static devclass_t en_devclass;
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DRIVER_MODULE(en, pci, en_driver, en_devclass, en_modevent, 0);
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