4d37f3729b
via an IBM PCI-PCI bridge (82351 or 82352 or 82353) The driver must identify if it is on a secondary PCI bus, which is created via the IBM PCI-PCI bridge. If it is, then it must initialise the IBM PCI-PCI bridge correctly. To do this, the following new functions are added. Because they use the pcici_t tag, they are considered 2.2 compatibility APIs pcici_t * pci_get_parent_from_tag(pcici_t tag); int pci_get_bus_from_tag(pcici_t tag); (The _from_tag suffix is used to prevent clashes with similarly named newbus PCI API functions) Submitted by: Anton Berezin <tobez@plab.ku.dk> Reviewed by: Doug Rabson <dfr@nlsystems.com> Reworked by: Me (roger)
286 lines
6.3 KiB
C
286 lines
6.3 KiB
C
/*
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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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 unmodified, this list of conditions, and the following
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* 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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*
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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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* $Id: pci_compat.c,v 1.28 1999/05/11 15:28:38 peter Exp $
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*
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*/
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#include "opt_bus.h"
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#include "pci.h"
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#if NPCI > 0
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/* for compatibility to FreeBSD-2.2 version of PCI code */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <sys/interrupt.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 <pci/pcireg.h>
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#include <pci/pcivar.h>
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#ifdef APIC_IO
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#include <machine/smp.h>
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#endif
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#ifdef __i386__
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#include <i386/isa/intr_machdep.h>
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#endif
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#ifdef PCI_COMPAT
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/* ------------------------------------------------------------------------- */
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u_long
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pci_conf_read(pcici_t cfg, u_long reg)
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{
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return (pci_read_config(cfg->dev, reg, 4));
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}
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void
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pci_conf_write(pcici_t cfg, u_long reg, u_long data)
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{
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pci_write_config(cfg->dev, reg, data, 4);
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}
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int
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pci_map_port(pcici_t cfg, u_long reg, pci_port_t* pa)
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{
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int rid;
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struct resource *res;
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rid = reg;
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res = bus_alloc_resource(cfg->dev, SYS_RES_IOPORT, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (res) {
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*pa = rman_get_start(res);
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return (1);
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}
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return (0);
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}
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int
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pci_map_mem(pcici_t cfg, u_long reg, vm_offset_t* va, vm_offset_t* pa)
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{
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int rid;
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struct resource *res;
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rid = reg;
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res = bus_alloc_resource(cfg->dev, SYS_RES_MEMORY, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (res) {
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*pa = rman_get_start(res);
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*va = (vm_offset_t) rman_get_virtual(res);
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return (1);
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}
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return (0);
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}
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int
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pci_map_dense(pcici_t cfg, u_long reg, vm_offset_t* va, vm_offset_t* pa)
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{
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if (pci_map_mem(cfg, reg, va, pa)){
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#ifdef __alpha__
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vm_offset_t dense;
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dense = pci_cvt_to_dense(*pa);
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if (dense) {
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*pa = dense;
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*va = ALPHA_PHYS_TO_K0SEG(*pa);
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return (1);
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}
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#endif
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#ifdef __i386__
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return(1);
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#endif
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}
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return (0);
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}
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int
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pci_map_bwx(pcici_t cfg, u_long reg, vm_offset_t* va, vm_offset_t* pa)
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{
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if (pci_map_mem(cfg, reg, va, pa)){
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#ifdef __alpha__
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vm_offset_t bwx;
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bwx = pci_cvt_to_bwx(*pa);
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if (bwx) {
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*pa = bwx;
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*va = ALPHA_PHYS_TO_K0SEG(*pa);
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return (1);
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}
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#endif
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#ifdef __i386__
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return(1);
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#endif
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}
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return (0);
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}
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int
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pci_map_int(pcici_t cfg, pci_inthand_t *handler, void *arg, intrmask_t *maskptr)
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{
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return (pci_map_int_right(cfg, handler, arg, maskptr, 0));
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}
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int
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pci_map_int_right(pcici_t cfg, pci_inthand_t *handler, void *arg,
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intrmask_t *maskptr, u_int intflags)
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{
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int error;
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#ifdef APIC_IO
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int nextpin, muxcnt;
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#endif
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if (cfg->intpin != 0) {
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int irq = cfg->intline;
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int rid = 0;
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struct resource *res;
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int flags = 0;
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int resflags = RF_SHAREABLE|RF_ACTIVE;
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void *ih;
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#ifdef INTR_FAST
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if (intflags & INTR_FAST)
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flags |= INTR_FAST;
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if (intflags & INTR_EXCL)
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resflags &= ~RF_SHAREABLE;
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#endif
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res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
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irq, irq, 1, resflags);
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if (!res) {
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printf("pci_map_int: can't allocate interrupt\n");
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return 0;
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}
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/*
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* This is ugly. Translate the mask into an interrupt type.
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*/
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if (maskptr == &tty_imask)
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flags |= INTR_TYPE_TTY;
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else if (maskptr == &bio_imask)
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flags |= INTR_TYPE_BIO;
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else if (maskptr == &net_imask)
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flags |= INTR_TYPE_NET;
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else if (maskptr == &cam_imask)
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flags |= INTR_TYPE_CAM;
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error = BUS_SETUP_INTR(device_get_parent(cfg->dev), cfg->dev,
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res, flags, handler, arg, &ih);
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if (error != 0)
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return 0;
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#ifdef NEW_BUS_PCI
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/*
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* XXX this apic stuff looks totally busted. It should
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* move to the nexus code which actually registers the
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* interrupt.
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*/
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#endif
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#ifdef APIC_IO
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nextpin = next_apic_irq(irq);
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if (nextpin < 0)
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return 1;
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/*
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* Attempt handling of some broken mp tables.
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*
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* It's OK to yell (since the mp tables are broken).
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*
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* Hanging in the boot is not OK
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*/
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muxcnt = 2;
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nextpin = next_apic_irq(nextpin);
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while (muxcnt < 5 && nextpin >= 0) {
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muxcnt++;
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nextpin = next_apic_irq(nextpin);
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}
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if (muxcnt >= 5) {
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printf("bogus MP table, more than 4 IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n");
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return 0;
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}
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printf("bogus MP table, %d IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n", muxcnt);
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nextpin = next_apic_irq(irq);
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while (nextpin >= 0) {
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rid = 0;
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res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
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nextpin, nextpin, 1,
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resflags);
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if (!res) {
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printf("pci_map_int: can't allocate extra interrupt\n");
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return 0;
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}
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error = BUS_SETUP_INTR(device_get_parent(cfg->dev),
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cfg->dev, res, flags,
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handler, arg, &ih);
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if (error != 0) {
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printf("pci_map_int: BUS_SETUP_INTR failed\n");
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return 0;
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}
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printf("Registered extra interrupt handler for int %d (in addition to int %d)\n", nextpin, irq);
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nextpin = next_apic_irq(nextpin);
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}
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#endif
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}
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return (1);
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}
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int
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pci_unmap_int(pcici_t cfg)
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{
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return (0); /* not supported, yet, since cfg doesn't know about idesc */
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}
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pcici_t
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pci_get_parent_from_tag(pcici_t tag)
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{
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return (pcici_t)pci_devlist_get_parent(tag);
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}
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int
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pci_get_bus_from_tag(pcici_t tag)
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{
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return tag->bus;
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}
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#endif /* PCI_COMPAT */
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#endif /* NPCI > 0 */
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