3036 lines
80 KiB
C
3036 lines
80 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
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* Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2000 BSDi
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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. 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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/*
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* PCI:PCI bridge support.
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*/
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#include "opt_pci.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/pciio.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/taskqueue.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/pci/pci_private.h>
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#include <dev/pci/pcib_private.h>
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#include "pcib_if.h"
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static int pcib_probe(device_t dev);
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static int pcib_suspend(device_t dev);
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static int pcib_resume(device_t dev);
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static int pcib_power_for_sleep(device_t pcib, device_t dev,
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int *pstate);
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static int pcib_ari_get_id(device_t pcib, device_t dev,
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enum pci_id_type type, uintptr_t *id);
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static uint32_t pcib_read_config(device_t dev, u_int b, u_int s,
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u_int f, u_int reg, int width);
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static void pcib_write_config(device_t dev, u_int b, u_int s,
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u_int f, u_int reg, uint32_t val, int width);
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static int pcib_ari_maxslots(device_t dev);
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static int pcib_ari_maxfuncs(device_t dev);
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static int pcib_try_enable_ari(device_t pcib, device_t dev);
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static int pcib_ari_enabled(device_t pcib);
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static void pcib_ari_decode_rid(device_t pcib, uint16_t rid,
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int *bus, int *slot, int *func);
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#ifdef PCI_HP
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static void pcib_pcie_ab_timeout(void *arg, int pending);
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static void pcib_pcie_cc_timeout(void *arg, int pending);
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static void pcib_pcie_dll_timeout(void *arg, int pending);
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#endif
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static int pcib_request_feature_default(device_t pcib, device_t dev,
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enum pci_feature feature);
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static int pcib_reset_child(device_t dev, device_t child, int flags);
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static device_method_t pcib_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, pcib_probe),
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DEVMETHOD(device_attach, pcib_attach),
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DEVMETHOD(device_detach, pcib_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, pcib_suspend),
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DEVMETHOD(device_resume, pcib_resume),
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/* Bus interface */
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DEVMETHOD(bus_child_present, pcib_child_present),
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DEVMETHOD(bus_read_ivar, pcib_read_ivar),
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DEVMETHOD(bus_write_ivar, pcib_write_ivar),
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DEVMETHOD(bus_alloc_resource, pcib_alloc_resource),
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#ifdef NEW_PCIB
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DEVMETHOD(bus_adjust_resource, pcib_adjust_resource),
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DEVMETHOD(bus_release_resource, pcib_release_resource),
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#else
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DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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#endif
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_reset_child, pcib_reset_child),
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/* pcib interface */
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DEVMETHOD(pcib_maxslots, pcib_ari_maxslots),
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DEVMETHOD(pcib_maxfuncs, pcib_ari_maxfuncs),
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DEVMETHOD(pcib_read_config, pcib_read_config),
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DEVMETHOD(pcib_write_config, pcib_write_config),
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DEVMETHOD(pcib_route_interrupt, pcib_route_interrupt),
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DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi),
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DEVMETHOD(pcib_release_msi, pcib_release_msi),
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DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix),
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DEVMETHOD(pcib_release_msix, pcib_release_msix),
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DEVMETHOD(pcib_map_msi, pcib_map_msi),
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DEVMETHOD(pcib_power_for_sleep, pcib_power_for_sleep),
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DEVMETHOD(pcib_get_id, pcib_ari_get_id),
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DEVMETHOD(pcib_try_enable_ari, pcib_try_enable_ari),
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DEVMETHOD(pcib_ari_enabled, pcib_ari_enabled),
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DEVMETHOD(pcib_decode_rid, pcib_ari_decode_rid),
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DEVMETHOD(pcib_request_feature, pcib_request_feature_default),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(pcib, pcib_driver, pcib_methods, sizeof(struct pcib_softc));
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EARLY_DRIVER_MODULE(pcib, pci, pcib_driver, NULL, NULL, BUS_PASS_BUS);
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#if defined(NEW_PCIB) || defined(PCI_HP)
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SYSCTL_DECL(_hw_pci);
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#endif
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#ifdef NEW_PCIB
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static int pci_clear_pcib;
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SYSCTL_INT(_hw_pci, OID_AUTO, clear_pcib, CTLFLAG_RDTUN, &pci_clear_pcib, 0,
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"Clear firmware-assigned resources for PCI-PCI bridge I/O windows.");
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/*
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* Get the corresponding window if this resource from a child device was
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* sub-allocated from one of our window resource managers.
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*/
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static struct pcib_window *
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pcib_get_resource_window(struct pcib_softc *sc, int type, struct resource *r)
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{
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switch (type) {
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case SYS_RES_IOPORT:
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if (rman_is_region_manager(r, &sc->io.rman))
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return (&sc->io);
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break;
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case SYS_RES_MEMORY:
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/* Prefetchable resources may live in either memory rman. */
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if (rman_get_flags(r) & RF_PREFETCHABLE &&
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rman_is_region_manager(r, &sc->pmem.rman))
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return (&sc->pmem);
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if (rman_is_region_manager(r, &sc->mem.rman))
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return (&sc->mem);
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break;
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}
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return (NULL);
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}
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/*
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* Is a resource from a child device sub-allocated from one of our
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* resource managers?
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*/
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static int
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pcib_is_resource_managed(struct pcib_softc *sc, int type, struct resource *r)
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{
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#ifdef PCI_RES_BUS
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if (type == PCI_RES_BUS)
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return (rman_is_region_manager(r, &sc->bus.rman));
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#endif
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return (pcib_get_resource_window(sc, type, r) != NULL);
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}
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static int
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pcib_is_window_open(struct pcib_window *pw)
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{
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return (pw->valid && pw->base < pw->limit);
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}
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/*
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* XXX: If RF_ACTIVE did not also imply allocating a bus space tag and
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* handle for the resource, we could pass RF_ACTIVE up to the PCI bus
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* when allocating the resource windows and rely on the PCI bus driver
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* to do this for us.
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*/
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static void
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pcib_activate_window(struct pcib_softc *sc, int type)
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{
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PCI_ENABLE_IO(device_get_parent(sc->dev), sc->dev, type);
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}
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static void
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pcib_write_windows(struct pcib_softc *sc, int mask)
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{
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device_t dev;
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uint32_t val;
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dev = sc->dev;
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if (sc->io.valid && mask & WIN_IO) {
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val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
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if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
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pci_write_config(dev, PCIR_IOBASEH_1,
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sc->io.base >> 16, 2);
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pci_write_config(dev, PCIR_IOLIMITH_1,
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sc->io.limit >> 16, 2);
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}
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pci_write_config(dev, PCIR_IOBASEL_1, sc->io.base >> 8, 1);
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pci_write_config(dev, PCIR_IOLIMITL_1, sc->io.limit >> 8, 1);
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}
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if (mask & WIN_MEM) {
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pci_write_config(dev, PCIR_MEMBASE_1, sc->mem.base >> 16, 2);
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pci_write_config(dev, PCIR_MEMLIMIT_1, sc->mem.limit >> 16, 2);
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}
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if (sc->pmem.valid && mask & WIN_PMEM) {
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val = pci_read_config(dev, PCIR_PMBASEL_1, 2);
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if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) {
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pci_write_config(dev, PCIR_PMBASEH_1,
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sc->pmem.base >> 32, 4);
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pci_write_config(dev, PCIR_PMLIMITH_1,
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sc->pmem.limit >> 32, 4);
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}
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pci_write_config(dev, PCIR_PMBASEL_1, sc->pmem.base >> 16, 2);
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pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmem.limit >> 16, 2);
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}
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}
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/*
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* This is used to reject I/O port allocations that conflict with an
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* ISA alias range.
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*/
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static int
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pcib_is_isa_range(struct pcib_softc *sc, rman_res_t start, rman_res_t end,
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rman_res_t count)
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{
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rman_res_t next_alias;
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if (!(sc->bridgectl & PCIB_BCR_ISA_ENABLE))
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return (0);
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/* Only check fixed ranges for overlap. */
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if (start + count - 1 != end)
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return (0);
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/* ISA aliases are only in the lower 64KB of I/O space. */
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if (start >= 65536)
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return (0);
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/* Check for overlap with 0x000 - 0x0ff as a special case. */
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if (start < 0x100)
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goto alias;
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/*
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* If the start address is an alias, the range is an alias.
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* Otherwise, compute the start of the next alias range and
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* check if it is before the end of the candidate range.
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*/
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if ((start & 0x300) != 0)
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goto alias;
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next_alias = (start & ~0x3fful) | 0x100;
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if (next_alias <= end)
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goto alias;
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return (0);
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alias:
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if (bootverbose)
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device_printf(sc->dev,
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"I/O range %#jx-%#jx overlaps with an ISA alias\n", start,
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end);
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return (1);
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}
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static void
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pcib_add_window_resources(struct pcib_window *w, struct resource **res,
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int count)
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{
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struct resource **newarray;
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int error, i;
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newarray = malloc(sizeof(struct resource *) * (w->count + count),
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M_DEVBUF, M_WAITOK);
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if (w->res != NULL)
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bcopy(w->res, newarray, sizeof(struct resource *) * w->count);
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bcopy(res, newarray + w->count, sizeof(struct resource *) * count);
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free(w->res, M_DEVBUF);
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w->res = newarray;
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w->count += count;
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for (i = 0; i < count; i++) {
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error = rman_manage_region(&w->rman, rman_get_start(res[i]),
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rman_get_end(res[i]));
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if (error)
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panic("Failed to add resource to rman");
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}
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}
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typedef void (nonisa_callback)(rman_res_t start, rman_res_t end, void *arg);
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static void
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pcib_walk_nonisa_ranges(rman_res_t start, rman_res_t end, nonisa_callback *cb,
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void *arg)
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{
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rman_res_t next_end;
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/*
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* If start is within an ISA alias range, move up to the start
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* of the next non-alias range. As a special case, addresses
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* in the range 0x000 - 0x0ff should also be skipped since
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* those are used for various system I/O devices in ISA
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* systems.
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*/
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if (start <= 65535) {
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if (start < 0x100 || (start & 0x300) != 0) {
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start &= ~0x3ff;
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start += 0x400;
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}
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}
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/* ISA aliases are only in the lower 64KB of I/O space. */
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while (start <= MIN(end, 65535)) {
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next_end = MIN(start | 0xff, end);
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cb(start, next_end, arg);
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start += 0x400;
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}
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if (start <= end)
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cb(start, end, arg);
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}
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static void
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count_ranges(rman_res_t start, rman_res_t end, void *arg)
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{
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int *countp;
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countp = arg;
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(*countp)++;
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}
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struct alloc_state {
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struct resource **res;
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struct pcib_softc *sc;
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int count, error;
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};
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static void
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alloc_ranges(rman_res_t start, rman_res_t end, void *arg)
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{
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struct alloc_state *as;
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struct pcib_window *w;
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int rid;
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as = arg;
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if (as->error != 0)
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return;
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w = &as->sc->io;
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rid = w->reg;
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if (bootverbose)
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device_printf(as->sc->dev,
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"allocating non-ISA range %#jx-%#jx\n", start, end);
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as->res[as->count] = bus_alloc_resource(as->sc->dev, SYS_RES_IOPORT,
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&rid, start, end, end - start + 1, 0);
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if (as->res[as->count] == NULL)
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as->error = ENXIO;
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else
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as->count++;
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}
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static int
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pcib_alloc_nonisa_ranges(struct pcib_softc *sc, rman_res_t start, rman_res_t end)
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{
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struct alloc_state as;
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int i, new_count;
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/* First, see how many ranges we need. */
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new_count = 0;
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pcib_walk_nonisa_ranges(start, end, count_ranges, &new_count);
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/* Second, allocate the ranges. */
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as.res = malloc(sizeof(struct resource *) * new_count, M_DEVBUF,
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M_WAITOK);
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as.sc = sc;
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as.count = 0;
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as.error = 0;
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pcib_walk_nonisa_ranges(start, end, alloc_ranges, &as);
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if (as.error != 0) {
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for (i = 0; i < as.count; i++)
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bus_release_resource(sc->dev, SYS_RES_IOPORT,
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sc->io.reg, as.res[i]);
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free(as.res, M_DEVBUF);
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return (as.error);
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}
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KASSERT(as.count == new_count, ("%s: count mismatch", __func__));
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|
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/* Third, add the ranges to the window. */
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pcib_add_window_resources(&sc->io, as.res, as.count);
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free(as.res, M_DEVBUF);
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return (0);
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}
|
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|
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static void
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pcib_alloc_window(struct pcib_softc *sc, struct pcib_window *w, int type,
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int flags, pci_addr_t max_address)
|
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{
|
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struct resource *res;
|
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char buf[64];
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int error, rid;
|
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|
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if (max_address != (rman_res_t)max_address)
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max_address = ~0;
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w->rman.rm_start = 0;
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w->rman.rm_end = max_address;
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w->rman.rm_type = RMAN_ARRAY;
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snprintf(buf, sizeof(buf), "%s %s window",
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device_get_nameunit(sc->dev), w->name);
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w->rman.rm_descr = strdup(buf, M_DEVBUF);
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error = rman_init(&w->rman);
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if (error)
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panic("Failed to initialize %s %s rman",
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device_get_nameunit(sc->dev), w->name);
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if (!pcib_is_window_open(w))
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return;
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|
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if (w->base > max_address || w->limit > max_address) {
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device_printf(sc->dev,
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"initial %s window has too many bits, ignoring\n", w->name);
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return;
|
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}
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if (type == SYS_RES_IOPORT && sc->bridgectl & PCIB_BCR_ISA_ENABLE)
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(void)pcib_alloc_nonisa_ranges(sc, w->base, w->limit);
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else {
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rid = w->reg;
|
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res = bus_alloc_resource(sc->dev, type, &rid, w->base, w->limit,
|
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w->limit - w->base + 1, flags);
|
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if (res != NULL)
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pcib_add_window_resources(w, &res, 1);
|
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}
|
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if (w->res == NULL) {
|
|
device_printf(sc->dev,
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"failed to allocate initial %s window: %#jx-%#jx\n",
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w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
|
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w->base = max_address;
|
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w->limit = 0;
|
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pcib_write_windows(sc, w->mask);
|
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return;
|
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}
|
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pcib_activate_window(sc, type);
|
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}
|
|
|
|
/*
|
|
* Initialize I/O windows.
|
|
*/
|
|
static void
|
|
pcib_probe_windows(struct pcib_softc *sc)
|
|
{
|
|
pci_addr_t max;
|
|
device_t dev;
|
|
uint32_t val;
|
|
|
|
dev = sc->dev;
|
|
|
|
if (pci_clear_pcib) {
|
|
pcib_bridge_init(dev);
|
|
}
|
|
|
|
/* Determine if the I/O port window is implemented. */
|
|
val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
|
|
if (val == 0) {
|
|
/*
|
|
* If 'val' is zero, then only 16-bits of I/O space
|
|
* are supported.
|
|
*/
|
|
pci_write_config(dev, PCIR_IOBASEL_1, 0xff, 1);
|
|
if (pci_read_config(dev, PCIR_IOBASEL_1, 1) != 0) {
|
|
sc->io.valid = 1;
|
|
pci_write_config(dev, PCIR_IOBASEL_1, 0, 1);
|
|
}
|
|
} else
|
|
sc->io.valid = 1;
|
|
|
|
/* Read the existing I/O port window. */
|
|
if (sc->io.valid) {
|
|
sc->io.reg = PCIR_IOBASEL_1;
|
|
sc->io.step = 12;
|
|
sc->io.mask = WIN_IO;
|
|
sc->io.name = "I/O port";
|
|
if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
|
|
sc->io.base = PCI_PPBIOBASE(
|
|
pci_read_config(dev, PCIR_IOBASEH_1, 2), val);
|
|
sc->io.limit = PCI_PPBIOLIMIT(
|
|
pci_read_config(dev, PCIR_IOLIMITH_1, 2),
|
|
pci_read_config(dev, PCIR_IOLIMITL_1, 1));
|
|
max = 0xffffffff;
|
|
} else {
|
|
sc->io.base = PCI_PPBIOBASE(0, val);
|
|
sc->io.limit = PCI_PPBIOLIMIT(0,
|
|
pci_read_config(dev, PCIR_IOLIMITL_1, 1));
|
|
max = 0xffff;
|
|
}
|
|
pcib_alloc_window(sc, &sc->io, SYS_RES_IOPORT, 0, max);
|
|
}
|
|
|
|
/* Read the existing memory window. */
|
|
sc->mem.valid = 1;
|
|
sc->mem.reg = PCIR_MEMBASE_1;
|
|
sc->mem.step = 20;
|
|
sc->mem.mask = WIN_MEM;
|
|
sc->mem.name = "memory";
|
|
sc->mem.base = PCI_PPBMEMBASE(0,
|
|
pci_read_config(dev, PCIR_MEMBASE_1, 2));
|
|
sc->mem.limit = PCI_PPBMEMLIMIT(0,
|
|
pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
|
|
pcib_alloc_window(sc, &sc->mem, SYS_RES_MEMORY, 0, 0xffffffff);
|
|
|
|
/* Determine if the prefetchable memory window is implemented. */
|
|
val = pci_read_config(dev, PCIR_PMBASEL_1, 2);
|
|
if (val == 0) {
|
|
/*
|
|
* If 'val' is zero, then only 32-bits of memory space
|
|
* are supported.
|
|
*/
|
|
pci_write_config(dev, PCIR_PMBASEL_1, 0xffff, 2);
|
|
if (pci_read_config(dev, PCIR_PMBASEL_1, 2) != 0) {
|
|
sc->pmem.valid = 1;
|
|
pci_write_config(dev, PCIR_PMBASEL_1, 0, 2);
|
|
}
|
|
} else
|
|
sc->pmem.valid = 1;
|
|
|
|
/* Read the existing prefetchable memory window. */
|
|
if (sc->pmem.valid) {
|
|
sc->pmem.reg = PCIR_PMBASEL_1;
|
|
sc->pmem.step = 20;
|
|
sc->pmem.mask = WIN_PMEM;
|
|
sc->pmem.name = "prefetch";
|
|
if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) {
|
|
sc->pmem.base = PCI_PPBMEMBASE(
|
|
pci_read_config(dev, PCIR_PMBASEH_1, 4), val);
|
|
sc->pmem.limit = PCI_PPBMEMLIMIT(
|
|
pci_read_config(dev, PCIR_PMLIMITH_1, 4),
|
|
pci_read_config(dev, PCIR_PMLIMITL_1, 2));
|
|
max = 0xffffffffffffffff;
|
|
} else {
|
|
sc->pmem.base = PCI_PPBMEMBASE(0, val);
|
|
sc->pmem.limit = PCI_PPBMEMLIMIT(0,
|
|
pci_read_config(dev, PCIR_PMLIMITL_1, 2));
|
|
max = 0xffffffff;
|
|
}
|
|
pcib_alloc_window(sc, &sc->pmem, SYS_RES_MEMORY,
|
|
RF_PREFETCHABLE, max);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pcib_release_window(struct pcib_softc *sc, struct pcib_window *w, int type)
|
|
{
|
|
device_t dev;
|
|
int error, i;
|
|
|
|
if (!w->valid)
|
|
return;
|
|
|
|
dev = sc->dev;
|
|
error = rman_fini(&w->rman);
|
|
if (error) {
|
|
device_printf(dev, "failed to release %s rman\n", w->name);
|
|
return;
|
|
}
|
|
free(__DECONST(char *, w->rman.rm_descr), M_DEVBUF);
|
|
|
|
for (i = 0; i < w->count; i++) {
|
|
error = bus_free_resource(dev, type, w->res[i]);
|
|
if (error)
|
|
device_printf(dev,
|
|
"failed to release %s resource: %d\n", w->name,
|
|
error);
|
|
}
|
|
free(w->res, M_DEVBUF);
|
|
}
|
|
|
|
static void
|
|
pcib_free_windows(struct pcib_softc *sc)
|
|
{
|
|
|
|
pcib_release_window(sc, &sc->pmem, SYS_RES_MEMORY);
|
|
pcib_release_window(sc, &sc->mem, SYS_RES_MEMORY);
|
|
pcib_release_window(sc, &sc->io, SYS_RES_IOPORT);
|
|
}
|
|
|
|
#ifdef PCI_RES_BUS
|
|
/*
|
|
* Allocate a suitable secondary bus for this bridge if needed and
|
|
* initialize the resource manager for the secondary bus range. Note
|
|
* that the minimum count is a desired value and this may allocate a
|
|
* smaller range.
|
|
*/
|
|
void
|
|
pcib_setup_secbus(device_t dev, struct pcib_secbus *bus, int min_count)
|
|
{
|
|
char buf[64];
|
|
int error, rid, sec_reg;
|
|
|
|
switch (pci_read_config(dev, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE) {
|
|
case PCIM_HDRTYPE_BRIDGE:
|
|
sec_reg = PCIR_SECBUS_1;
|
|
bus->sub_reg = PCIR_SUBBUS_1;
|
|
break;
|
|
case PCIM_HDRTYPE_CARDBUS:
|
|
sec_reg = PCIR_SECBUS_2;
|
|
bus->sub_reg = PCIR_SUBBUS_2;
|
|
break;
|
|
default:
|
|
panic("not a PCI bridge");
|
|
}
|
|
bus->sec = pci_read_config(dev, sec_reg, 1);
|
|
bus->sub = pci_read_config(dev, bus->sub_reg, 1);
|
|
bus->dev = dev;
|
|
bus->rman.rm_start = 0;
|
|
bus->rman.rm_end = PCI_BUSMAX;
|
|
bus->rman.rm_type = RMAN_ARRAY;
|
|
snprintf(buf, sizeof(buf), "%s bus numbers", device_get_nameunit(dev));
|
|
bus->rman.rm_descr = strdup(buf, M_DEVBUF);
|
|
error = rman_init(&bus->rman);
|
|
if (error)
|
|
panic("Failed to initialize %s bus number rman",
|
|
device_get_nameunit(dev));
|
|
|
|
/*
|
|
* Allocate a bus range. This will return an existing bus range
|
|
* if one exists, or a new bus range if one does not.
|
|
*/
|
|
rid = 0;
|
|
bus->res = bus_alloc_resource_anywhere(dev, PCI_RES_BUS, &rid,
|
|
min_count, 0);
|
|
if (bus->res == NULL) {
|
|
/*
|
|
* Fall back to just allocating a range of a single bus
|
|
* number.
|
|
*/
|
|
bus->res = bus_alloc_resource_anywhere(dev, PCI_RES_BUS, &rid,
|
|
1, 0);
|
|
} else if (rman_get_size(bus->res) < min_count)
|
|
/*
|
|
* Attempt to grow the existing range to satisfy the
|
|
* minimum desired count.
|
|
*/
|
|
(void)bus_adjust_resource(dev, PCI_RES_BUS, bus->res,
|
|
rman_get_start(bus->res), rman_get_start(bus->res) +
|
|
min_count - 1);
|
|
|
|
/*
|
|
* Add the initial resource to the rman.
|
|
*/
|
|
if (bus->res != NULL) {
|
|
error = rman_manage_region(&bus->rman, rman_get_start(bus->res),
|
|
rman_get_end(bus->res));
|
|
if (error)
|
|
panic("Failed to add resource to rman");
|
|
bus->sec = rman_get_start(bus->res);
|
|
bus->sub = rman_get_end(bus->res);
|
|
}
|
|
}
|
|
|
|
void
|
|
pcib_free_secbus(device_t dev, struct pcib_secbus *bus)
|
|
{
|
|
int error;
|
|
|
|
error = rman_fini(&bus->rman);
|
|
if (error) {
|
|
device_printf(dev, "failed to release bus number rman\n");
|
|
return;
|
|
}
|
|
free(__DECONST(char *, bus->rman.rm_descr), M_DEVBUF);
|
|
|
|
error = bus_free_resource(dev, PCI_RES_BUS, bus->res);
|
|
if (error)
|
|
device_printf(dev,
|
|
"failed to release bus numbers resource: %d\n", error);
|
|
}
|
|
|
|
static struct resource *
|
|
pcib_suballoc_bus(struct pcib_secbus *bus, device_t child, int *rid,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct resource *res;
|
|
|
|
res = rman_reserve_resource(&bus->rman, start, end, count, flags,
|
|
child);
|
|
if (res == NULL)
|
|
return (NULL);
|
|
|
|
if (bootverbose)
|
|
device_printf(bus->dev,
|
|
"allocated bus range (%ju-%ju) for rid %d of %s\n",
|
|
rman_get_start(res), rman_get_end(res), *rid,
|
|
pcib_child_name(child));
|
|
rman_set_rid(res, *rid);
|
|
return (res);
|
|
}
|
|
|
|
/*
|
|
* Attempt to grow the secondary bus range. This is much simpler than
|
|
* for I/O windows as the range can only be grown by increasing
|
|
* subbus.
|
|
*/
|
|
static int
|
|
pcib_grow_subbus(struct pcib_secbus *bus, rman_res_t new_end)
|
|
{
|
|
rman_res_t old_end;
|
|
int error;
|
|
|
|
old_end = rman_get_end(bus->res);
|
|
KASSERT(new_end > old_end, ("attempt to shrink subbus"));
|
|
error = bus_adjust_resource(bus->dev, PCI_RES_BUS, bus->res,
|
|
rman_get_start(bus->res), new_end);
|
|
if (error)
|
|
return (error);
|
|
if (bootverbose)
|
|
device_printf(bus->dev, "grew bus range to %ju-%ju\n",
|
|
rman_get_start(bus->res), rman_get_end(bus->res));
|
|
error = rman_manage_region(&bus->rman, old_end + 1,
|
|
rman_get_end(bus->res));
|
|
if (error)
|
|
panic("Failed to add resource to rman");
|
|
bus->sub = rman_get_end(bus->res);
|
|
pci_write_config(bus->dev, bus->sub_reg, bus->sub, 1);
|
|
return (0);
|
|
}
|
|
|
|
struct resource *
|
|
pcib_alloc_subbus(struct pcib_secbus *bus, device_t child, int *rid,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct resource *res;
|
|
rman_res_t start_free, end_free, new_end;
|
|
|
|
/*
|
|
* First, see if the request can be satisified by the existing
|
|
* bus range.
|
|
*/
|
|
res = pcib_suballoc_bus(bus, child, rid, start, end, count, flags);
|
|
if (res != NULL)
|
|
return (res);
|
|
|
|
/*
|
|
* Figure out a range to grow the bus range. First, find the
|
|
* first bus number after the last allocated bus in the rman and
|
|
* enforce that as a minimum starting point for the range.
|
|
*/
|
|
if (rman_last_free_region(&bus->rman, &start_free, &end_free) != 0 ||
|
|
end_free != bus->sub)
|
|
start_free = bus->sub + 1;
|
|
if (start_free < start)
|
|
start_free = start;
|
|
new_end = start_free + count - 1;
|
|
|
|
/*
|
|
* See if this new range would satisfy the request if it
|
|
* succeeds.
|
|
*/
|
|
if (new_end > end)
|
|
return (NULL);
|
|
|
|
/* Finally, attempt to grow the existing resource. */
|
|
if (bootverbose) {
|
|
device_printf(bus->dev,
|
|
"attempting to grow bus range for %ju buses\n", count);
|
|
printf("\tback candidate range: %ju-%ju\n", start_free,
|
|
new_end);
|
|
}
|
|
if (pcib_grow_subbus(bus, new_end) == 0)
|
|
return (pcib_suballoc_bus(bus, child, rid, start, end, count,
|
|
flags));
|
|
return (NULL);
|
|
}
|
|
#endif
|
|
|
|
#else
|
|
|
|
/*
|
|
* Is the prefetch window open (eg, can we allocate memory in it?)
|
|
*/
|
|
static int
|
|
pcib_is_prefetch_open(struct pcib_softc *sc)
|
|
{
|
|
return (sc->pmembase > 0 && sc->pmembase < sc->pmemlimit);
|
|
}
|
|
|
|
/*
|
|
* Is the nonprefetch window open (eg, can we allocate memory in it?)
|
|
*/
|
|
static int
|
|
pcib_is_nonprefetch_open(struct pcib_softc *sc)
|
|
{
|
|
return (sc->membase > 0 && sc->membase < sc->memlimit);
|
|
}
|
|
|
|
/*
|
|
* Is the io window open (eg, can we allocate ports in it?)
|
|
*/
|
|
static int
|
|
pcib_is_io_open(struct pcib_softc *sc)
|
|
{
|
|
return (sc->iobase > 0 && sc->iobase < sc->iolimit);
|
|
}
|
|
|
|
/*
|
|
* Get current I/O decode.
|
|
*/
|
|
static void
|
|
pcib_get_io_decode(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
uint32_t iolow;
|
|
|
|
dev = sc->dev;
|
|
|
|
iolow = pci_read_config(dev, PCIR_IOBASEL_1, 1);
|
|
if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
|
|
sc->iobase = PCI_PPBIOBASE(
|
|
pci_read_config(dev, PCIR_IOBASEH_1, 2), iolow);
|
|
else
|
|
sc->iobase = PCI_PPBIOBASE(0, iolow);
|
|
|
|
iolow = pci_read_config(dev, PCIR_IOLIMITL_1, 1);
|
|
if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
|
|
sc->iolimit = PCI_PPBIOLIMIT(
|
|
pci_read_config(dev, PCIR_IOLIMITH_1, 2), iolow);
|
|
else
|
|
sc->iolimit = PCI_PPBIOLIMIT(0, iolow);
|
|
}
|
|
|
|
/*
|
|
* Get current memory decode.
|
|
*/
|
|
static void
|
|
pcib_get_mem_decode(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
pci_addr_t pmemlow;
|
|
|
|
dev = sc->dev;
|
|
|
|
sc->membase = PCI_PPBMEMBASE(0,
|
|
pci_read_config(dev, PCIR_MEMBASE_1, 2));
|
|
sc->memlimit = PCI_PPBMEMLIMIT(0,
|
|
pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
|
|
|
|
pmemlow = pci_read_config(dev, PCIR_PMBASEL_1, 2);
|
|
if ((pmemlow & PCIM_BRPM_MASK) == PCIM_BRPM_64)
|
|
sc->pmembase = PCI_PPBMEMBASE(
|
|
pci_read_config(dev, PCIR_PMBASEH_1, 4), pmemlow);
|
|
else
|
|
sc->pmembase = PCI_PPBMEMBASE(0, pmemlow);
|
|
|
|
pmemlow = pci_read_config(dev, PCIR_PMLIMITL_1, 2);
|
|
if ((pmemlow & PCIM_BRPM_MASK) == PCIM_BRPM_64)
|
|
sc->pmemlimit = PCI_PPBMEMLIMIT(
|
|
pci_read_config(dev, PCIR_PMLIMITH_1, 4), pmemlow);
|
|
else
|
|
sc->pmemlimit = PCI_PPBMEMLIMIT(0, pmemlow);
|
|
}
|
|
|
|
/*
|
|
* Restore previous I/O decode.
|
|
*/
|
|
static void
|
|
pcib_set_io_decode(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
uint32_t iohi;
|
|
|
|
dev = sc->dev;
|
|
|
|
iohi = sc->iobase >> 16;
|
|
if (iohi > 0)
|
|
pci_write_config(dev, PCIR_IOBASEH_1, iohi, 2);
|
|
pci_write_config(dev, PCIR_IOBASEL_1, sc->iobase >> 8, 1);
|
|
|
|
iohi = sc->iolimit >> 16;
|
|
if (iohi > 0)
|
|
pci_write_config(dev, PCIR_IOLIMITH_1, iohi, 2);
|
|
pci_write_config(dev, PCIR_IOLIMITL_1, sc->iolimit >> 8, 1);
|
|
}
|
|
|
|
/*
|
|
* Restore previous memory decode.
|
|
*/
|
|
static void
|
|
pcib_set_mem_decode(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
pci_addr_t pmemhi;
|
|
|
|
dev = sc->dev;
|
|
|
|
pci_write_config(dev, PCIR_MEMBASE_1, sc->membase >> 16, 2);
|
|
pci_write_config(dev, PCIR_MEMLIMIT_1, sc->memlimit >> 16, 2);
|
|
|
|
pmemhi = sc->pmembase >> 32;
|
|
if (pmemhi > 0)
|
|
pci_write_config(dev, PCIR_PMBASEH_1, pmemhi, 4);
|
|
pci_write_config(dev, PCIR_PMBASEL_1, sc->pmembase >> 16, 2);
|
|
|
|
pmemhi = sc->pmemlimit >> 32;
|
|
if (pmemhi > 0)
|
|
pci_write_config(dev, PCIR_PMLIMITH_1, pmemhi, 4);
|
|
pci_write_config(dev, PCIR_PMLIMITL_1, sc->pmemlimit >> 16, 2);
|
|
}
|
|
#endif
|
|
|
|
#ifdef PCI_HP
|
|
/*
|
|
* PCI-express HotPlug support.
|
|
*/
|
|
static int pci_enable_pcie_hp = 1;
|
|
SYSCTL_INT(_hw_pci, OID_AUTO, enable_pcie_hp, CTLFLAG_RDTUN,
|
|
&pci_enable_pcie_hp, 0,
|
|
"Enable support for native PCI-express HotPlug.");
|
|
|
|
TASKQUEUE_DEFINE_THREAD(pci_hp);
|
|
|
|
static void
|
|
pcib_probe_hotplug(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
uint32_t link_cap;
|
|
uint16_t link_sta, slot_sta;
|
|
|
|
if (!pci_enable_pcie_hp)
|
|
return;
|
|
|
|
dev = sc->dev;
|
|
if (pci_find_cap(dev, PCIY_EXPRESS, NULL) != 0)
|
|
return;
|
|
|
|
if (!(pcie_read_config(dev, PCIER_FLAGS, 2) & PCIEM_FLAGS_SLOT))
|
|
return;
|
|
|
|
sc->pcie_slot_cap = pcie_read_config(dev, PCIER_SLOT_CAP, 4);
|
|
|
|
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_HPC) == 0)
|
|
return;
|
|
link_cap = pcie_read_config(dev, PCIER_LINK_CAP, 4);
|
|
if ((link_cap & PCIEM_LINK_CAP_DL_ACTIVE) == 0)
|
|
return;
|
|
|
|
/*
|
|
* Some devices report that they have an MRL when they actually
|
|
* do not. Since they always report that the MRL is open, child
|
|
* devices would be ignored. Try to detect these devices and
|
|
* ignore their claim of HotPlug support.
|
|
*
|
|
* If there is an open MRL but the Data Link Layer is active,
|
|
* the MRL is not real.
|
|
*/
|
|
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_MRLSP) != 0) {
|
|
link_sta = pcie_read_config(dev, PCIER_LINK_STA, 2);
|
|
slot_sta = pcie_read_config(dev, PCIER_SLOT_STA, 2);
|
|
if ((slot_sta & PCIEM_SLOT_STA_MRLSS) != 0 &&
|
|
(link_sta & PCIEM_LINK_STA_DL_ACTIVE) != 0) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that we're sure we want to do hot plug, ask the
|
|
* firmware, if any, if that's OK.
|
|
*/
|
|
if (pcib_request_feature(dev, PCI_FEATURE_HP) != 0) {
|
|
if (bootverbose)
|
|
device_printf(dev, "Unable to activate hot plug feature.\n");
|
|
return;
|
|
}
|
|
|
|
sc->flags |= PCIB_HOTPLUG;
|
|
}
|
|
|
|
/*
|
|
* Send a HotPlug command to the slot control register. If this slot
|
|
* uses command completion interrupts and a previous command is still
|
|
* in progress, then the command is dropped. Once the previous
|
|
* command completes or times out, pcib_pcie_hotplug_update() will be
|
|
* invoked to post a new command based on the slot's state at that
|
|
* time.
|
|
*/
|
|
static void
|
|
pcib_pcie_hotplug_command(struct pcib_softc *sc, uint16_t val, uint16_t mask)
|
|
{
|
|
device_t dev;
|
|
uint16_t ctl, new;
|
|
|
|
dev = sc->dev;
|
|
|
|
if (sc->flags & PCIB_HOTPLUG_CMD_PENDING)
|
|
return;
|
|
|
|
ctl = pcie_read_config(dev, PCIER_SLOT_CTL, 2);
|
|
new = (ctl & ~mask) | val;
|
|
if (new == ctl)
|
|
return;
|
|
if (bootverbose)
|
|
device_printf(dev, "HotPlug command: %04x -> %04x\n", ctl, new);
|
|
pcie_write_config(dev, PCIER_SLOT_CTL, new, 2);
|
|
if (!(sc->pcie_slot_cap & PCIEM_SLOT_CAP_NCCS) &&
|
|
(ctl & new) & PCIEM_SLOT_CTL_CCIE) {
|
|
sc->flags |= PCIB_HOTPLUG_CMD_PENDING;
|
|
if (!cold)
|
|
taskqueue_enqueue_timeout(taskqueue_pci_hp,
|
|
&sc->pcie_cc_task, hz);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_hotplug_command_completed(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
|
|
dev = sc->dev;
|
|
|
|
if (bootverbose)
|
|
device_printf(dev, "Command Completed\n");
|
|
if (!(sc->flags & PCIB_HOTPLUG_CMD_PENDING))
|
|
return;
|
|
taskqueue_cancel_timeout(taskqueue_pci_hp, &sc->pcie_cc_task, NULL);
|
|
sc->flags &= ~PCIB_HOTPLUG_CMD_PENDING;
|
|
wakeup(sc);
|
|
}
|
|
|
|
/*
|
|
* Returns true if a card is fully inserted from the user's
|
|
* perspective. It may not yet be ready for access, but the driver
|
|
* can now start enabling access if necessary.
|
|
*/
|
|
static bool
|
|
pcib_hotplug_inserted(struct pcib_softc *sc)
|
|
{
|
|
|
|
/* Pretend the card isn't present if a detach is forced. */
|
|
if (sc->flags & PCIB_DETACHING)
|
|
return (false);
|
|
|
|
/* Card must be present in the slot. */
|
|
if ((sc->pcie_slot_sta & PCIEM_SLOT_STA_PDS) == 0)
|
|
return (false);
|
|
|
|
/* A power fault implicitly turns off power to the slot. */
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_PFD)
|
|
return (false);
|
|
|
|
/* If the MRL is disengaged, the slot is powered off. */
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_MRLSP &&
|
|
(sc->pcie_slot_sta & PCIEM_SLOT_STA_MRLSS) != 0)
|
|
return (false);
|
|
|
|
return (true);
|
|
}
|
|
|
|
/*
|
|
* Returns -1 if the card is fully inserted, powered, and ready for
|
|
* access. Otherwise, returns 0.
|
|
*/
|
|
static int
|
|
pcib_hotplug_present(struct pcib_softc *sc)
|
|
{
|
|
|
|
/* Card must be inserted. */
|
|
if (!pcib_hotplug_inserted(sc))
|
|
return (0);
|
|
|
|
/* Require the Data Link Layer to be active. */
|
|
if (!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE))
|
|
return (0);
|
|
|
|
return (-1);
|
|
}
|
|
|
|
static int pci_enable_pcie_ei = 0;
|
|
SYSCTL_INT(_hw_pci, OID_AUTO, enable_pcie_ei, CTLFLAG_RWTUN,
|
|
&pci_enable_pcie_ei, 0,
|
|
"Enable support for PCI-express Electromechanical Interlock.");
|
|
|
|
static void
|
|
pcib_pcie_hotplug_update(struct pcib_softc *sc, uint16_t val, uint16_t mask,
|
|
bool schedule_task)
|
|
{
|
|
bool card_inserted, ei_engaged;
|
|
|
|
/* Clear DETACHING if Presence Detect has cleared. */
|
|
if ((sc->pcie_slot_sta & (PCIEM_SLOT_STA_PDC | PCIEM_SLOT_STA_PDS)) ==
|
|
PCIEM_SLOT_STA_PDC)
|
|
sc->flags &= ~PCIB_DETACHING;
|
|
|
|
card_inserted = pcib_hotplug_inserted(sc);
|
|
|
|
/* Turn the power indicator on if a card is inserted. */
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_PIP) {
|
|
mask |= PCIEM_SLOT_CTL_PIC;
|
|
if (card_inserted)
|
|
val |= PCIEM_SLOT_CTL_PI_ON;
|
|
else if (sc->flags & PCIB_DETACH_PENDING)
|
|
val |= PCIEM_SLOT_CTL_PI_BLINK;
|
|
else
|
|
val |= PCIEM_SLOT_CTL_PI_OFF;
|
|
}
|
|
|
|
/* Turn the power on via the Power Controller if a card is inserted. */
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_PCP) {
|
|
mask |= PCIEM_SLOT_CTL_PCC;
|
|
if (card_inserted)
|
|
val |= PCIEM_SLOT_CTL_PC_ON;
|
|
else
|
|
val |= PCIEM_SLOT_CTL_PC_OFF;
|
|
}
|
|
|
|
/*
|
|
* If a card is inserted, enable the Electromechanical
|
|
* Interlock. If a card is not inserted (or we are in the
|
|
* process of detaching), disable the Electromechanical
|
|
* Interlock.
|
|
*/
|
|
if ((sc->pcie_slot_cap & PCIEM_SLOT_CAP_EIP) &&
|
|
pci_enable_pcie_ei) {
|
|
mask |= PCIEM_SLOT_CTL_EIC;
|
|
ei_engaged = (sc->pcie_slot_sta & PCIEM_SLOT_STA_EIS) != 0;
|
|
if (card_inserted != ei_engaged)
|
|
val |= PCIEM_SLOT_CTL_EIC;
|
|
}
|
|
|
|
/*
|
|
* Start a timer to see if the Data Link Layer times out.
|
|
* Note that we only start the timer if Presence Detect or MRL Sensor
|
|
* changed on this interrupt. Stop any scheduled timer if
|
|
* the Data Link Layer is active.
|
|
*/
|
|
if (card_inserted &&
|
|
!(sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE) &&
|
|
sc->pcie_slot_sta &
|
|
(PCIEM_SLOT_STA_MRLSC | PCIEM_SLOT_STA_PDC)) {
|
|
if (cold)
|
|
device_printf(sc->dev,
|
|
"Data Link Layer inactive\n");
|
|
else
|
|
taskqueue_enqueue_timeout(taskqueue_pci_hp,
|
|
&sc->pcie_dll_task, hz);
|
|
} else if (sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE)
|
|
taskqueue_cancel_timeout(taskqueue_pci_hp, &sc->pcie_dll_task,
|
|
NULL);
|
|
|
|
pcib_pcie_hotplug_command(sc, val, mask);
|
|
|
|
/*
|
|
* During attach the child "pci" device is added synchronously;
|
|
* otherwise, the task is scheduled to manage the child
|
|
* device.
|
|
*/
|
|
if (schedule_task &&
|
|
(pcib_hotplug_present(sc) != 0) != (sc->child != NULL))
|
|
taskqueue_enqueue(taskqueue_pci_hp, &sc->pcie_hp_task);
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_intr_hotplug(void *arg)
|
|
{
|
|
struct pcib_softc *sc;
|
|
device_t dev;
|
|
uint16_t old_slot_sta;
|
|
|
|
sc = arg;
|
|
dev = sc->dev;
|
|
PCIB_HP_LOCK(sc);
|
|
old_slot_sta = sc->pcie_slot_sta;
|
|
sc->pcie_slot_sta = pcie_read_config(dev, PCIER_SLOT_STA, 2);
|
|
|
|
/* Clear the events just reported. */
|
|
pcie_write_config(dev, PCIER_SLOT_STA, sc->pcie_slot_sta, 2);
|
|
|
|
if (bootverbose)
|
|
device_printf(dev, "HotPlug interrupt: %#x\n",
|
|
sc->pcie_slot_sta);
|
|
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_ABP) {
|
|
if (sc->flags & PCIB_DETACH_PENDING) {
|
|
device_printf(dev,
|
|
"Attention Button Pressed: Detach Cancelled\n");
|
|
sc->flags &= ~PCIB_DETACH_PENDING;
|
|
taskqueue_cancel_timeout(taskqueue_pci_hp,
|
|
&sc->pcie_ab_task, NULL);
|
|
} else if (old_slot_sta & PCIEM_SLOT_STA_PDS) {
|
|
/* Only initiate detach sequence if device present. */
|
|
device_printf(dev,
|
|
"Attention Button Pressed: Detaching in 5 seconds\n");
|
|
sc->flags |= PCIB_DETACH_PENDING;
|
|
taskqueue_enqueue_timeout(taskqueue_pci_hp,
|
|
&sc->pcie_ab_task, 5 * hz);
|
|
}
|
|
}
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_PFD)
|
|
device_printf(dev, "Power Fault Detected\n");
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_MRLSC)
|
|
device_printf(dev, "MRL Sensor Changed to %s\n",
|
|
sc->pcie_slot_sta & PCIEM_SLOT_STA_MRLSS ? "open" :
|
|
"closed");
|
|
if (bootverbose && sc->pcie_slot_sta & PCIEM_SLOT_STA_PDC)
|
|
device_printf(dev, "Presence Detect Changed to %s\n",
|
|
sc->pcie_slot_sta & PCIEM_SLOT_STA_PDS ? "card present" :
|
|
"empty");
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_CC)
|
|
pcib_pcie_hotplug_command_completed(sc);
|
|
if (sc->pcie_slot_sta & PCIEM_SLOT_STA_DLLSC) {
|
|
sc->pcie_link_sta = pcie_read_config(dev, PCIER_LINK_STA, 2);
|
|
if (bootverbose)
|
|
device_printf(dev,
|
|
"Data Link Layer State Changed to %s\n",
|
|
sc->pcie_link_sta & PCIEM_LINK_STA_DL_ACTIVE ?
|
|
"active" : "inactive");
|
|
}
|
|
|
|
pcib_pcie_hotplug_update(sc, 0, 0, true);
|
|
PCIB_HP_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_hotplug_task(void *context, int pending)
|
|
{
|
|
struct pcib_softc *sc;
|
|
device_t dev;
|
|
|
|
sc = context;
|
|
PCIB_HP_LOCK(sc);
|
|
dev = sc->dev;
|
|
if (pcib_hotplug_present(sc) != 0) {
|
|
if (sc->child == NULL) {
|
|
sc->child = device_add_child(dev, "pci", -1);
|
|
bus_generic_attach(dev);
|
|
}
|
|
} else {
|
|
if (sc->child != NULL) {
|
|
if (device_delete_child(dev, sc->child) == 0)
|
|
sc->child = NULL;
|
|
}
|
|
}
|
|
PCIB_HP_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_ab_timeout(void *arg, int pending)
|
|
{
|
|
struct pcib_softc *sc = arg;
|
|
|
|
PCIB_HP_LOCK(sc);
|
|
if (sc->flags & PCIB_DETACH_PENDING) {
|
|
sc->flags |= PCIB_DETACHING;
|
|
sc->flags &= ~PCIB_DETACH_PENDING;
|
|
pcib_pcie_hotplug_update(sc, 0, 0, true);
|
|
}
|
|
PCIB_HP_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_cc_timeout(void *arg, int pending)
|
|
{
|
|
struct pcib_softc *sc = arg;
|
|
device_t dev = sc->dev;
|
|
uint16_t sta;
|
|
|
|
PCIB_HP_LOCK(sc);
|
|
sta = pcie_read_config(dev, PCIER_SLOT_STA, 2);
|
|
if (!(sta & PCIEM_SLOT_STA_CC)) {
|
|
device_printf(dev, "HotPlug Command Timed Out\n");
|
|
sc->flags &= ~PCIB_HOTPLUG_CMD_PENDING;
|
|
} else {
|
|
device_printf(dev,
|
|
"Missed HotPlug interrupt waiting for Command Completion\n");
|
|
pcib_pcie_intr_hotplug(sc);
|
|
}
|
|
PCIB_HP_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
pcib_pcie_dll_timeout(void *arg, int pending)
|
|
{
|
|
struct pcib_softc *sc = arg;
|
|
device_t dev = sc->dev;
|
|
uint16_t sta;
|
|
|
|
PCIB_HP_LOCK(sc);
|
|
sta = pcie_read_config(dev, PCIER_LINK_STA, 2);
|
|
if (!(sta & PCIEM_LINK_STA_DL_ACTIVE)) {
|
|
device_printf(dev,
|
|
"Timed out waiting for Data Link Layer Active\n");
|
|
sc->flags |= PCIB_DETACHING;
|
|
pcib_pcie_hotplug_update(sc, 0, 0, true);
|
|
} else if (sta != sc->pcie_link_sta) {
|
|
device_printf(dev,
|
|
"Missed HotPlug interrupt waiting for DLL Active\n");
|
|
pcib_pcie_intr_hotplug(sc);
|
|
}
|
|
PCIB_HP_UNLOCK(sc);
|
|
}
|
|
|
|
static int
|
|
pcib_alloc_pcie_irq(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
int count, error, mem_rid, rid;
|
|
|
|
rid = -1;
|
|
dev = sc->dev;
|
|
|
|
/*
|
|
* For simplicity, only use MSI-X if there is a single message.
|
|
* To support a device with multiple messages we would have to
|
|
* use remap intr if the MSI number is not 0.
|
|
*/
|
|
count = pci_msix_count(dev);
|
|
if (count == 1) {
|
|
mem_rid = pci_msix_table_bar(dev);
|
|
sc->pcie_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
|
|
&mem_rid, RF_ACTIVE);
|
|
if (sc->pcie_mem == NULL) {
|
|
device_printf(dev,
|
|
"Failed to allocate BAR for MSI-X table\n");
|
|
} else {
|
|
error = pci_alloc_msix(dev, &count);
|
|
if (error == 0)
|
|
rid = 1;
|
|
}
|
|
}
|
|
|
|
if (rid < 0 && pci_msi_count(dev) > 0) {
|
|
count = 1;
|
|
error = pci_alloc_msi(dev, &count);
|
|
if (error == 0)
|
|
rid = 1;
|
|
}
|
|
|
|
if (rid < 0)
|
|
rid = 0;
|
|
|
|
sc->pcie_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
|
RF_ACTIVE | RF_SHAREABLE);
|
|
if (sc->pcie_irq == NULL) {
|
|
device_printf(dev,
|
|
"Failed to allocate interrupt for PCI-e events\n");
|
|
if (rid > 0)
|
|
pci_release_msi(dev);
|
|
return (ENXIO);
|
|
}
|
|
|
|
error = bus_setup_intr(dev, sc->pcie_irq, INTR_TYPE_MISC|INTR_MPSAFE,
|
|
NULL, pcib_pcie_intr_hotplug, sc, &sc->pcie_ihand);
|
|
if (error) {
|
|
device_printf(dev, "Failed to setup PCI-e interrupt handler\n");
|
|
bus_release_resource(dev, SYS_RES_IRQ, rid, sc->pcie_irq);
|
|
if (rid > 0)
|
|
pci_release_msi(dev);
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcib_release_pcie_irq(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
int error;
|
|
|
|
dev = sc->dev;
|
|
error = bus_teardown_intr(dev, sc->pcie_irq, sc->pcie_ihand);
|
|
if (error)
|
|
return (error);
|
|
error = bus_free_resource(dev, SYS_RES_IRQ, sc->pcie_irq);
|
|
if (error)
|
|
return (error);
|
|
error = pci_release_msi(dev);
|
|
if (error)
|
|
return (error);
|
|
if (sc->pcie_mem != NULL)
|
|
error = bus_free_resource(dev, SYS_RES_MEMORY, sc->pcie_mem);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
pcib_setup_hotplug(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
uint16_t mask, val;
|
|
|
|
dev = sc->dev;
|
|
TASK_INIT(&sc->pcie_hp_task, 0, pcib_pcie_hotplug_task, sc);
|
|
TIMEOUT_TASK_INIT(taskqueue_pci_hp, &sc->pcie_ab_task, 0,
|
|
pcib_pcie_ab_timeout, sc);
|
|
TIMEOUT_TASK_INIT(taskqueue_pci_hp, &sc->pcie_cc_task, 0,
|
|
pcib_pcie_cc_timeout, sc);
|
|
TIMEOUT_TASK_INIT(taskqueue_pci_hp, &sc->pcie_dll_task, 0,
|
|
pcib_pcie_dll_timeout, sc);
|
|
sc->pcie_hp_lock = bus_topo_mtx();
|
|
|
|
/* Allocate IRQ. */
|
|
if (pcib_alloc_pcie_irq(sc) != 0)
|
|
return;
|
|
|
|
sc->pcie_link_sta = pcie_read_config(dev, PCIER_LINK_STA, 2);
|
|
sc->pcie_slot_sta = pcie_read_config(dev, PCIER_SLOT_STA, 2);
|
|
|
|
/* Clear any events previously pending. */
|
|
pcie_write_config(dev, PCIER_SLOT_STA, sc->pcie_slot_sta, 2);
|
|
|
|
/* Enable HotPlug events. */
|
|
mask = PCIEM_SLOT_CTL_DLLSCE | PCIEM_SLOT_CTL_HPIE |
|
|
PCIEM_SLOT_CTL_CCIE | PCIEM_SLOT_CTL_PDCE | PCIEM_SLOT_CTL_MRLSCE |
|
|
PCIEM_SLOT_CTL_PFDE | PCIEM_SLOT_CTL_ABPE;
|
|
val = PCIEM_SLOT_CTL_DLLSCE | PCIEM_SLOT_CTL_HPIE | PCIEM_SLOT_CTL_PDCE;
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_APB)
|
|
val |= PCIEM_SLOT_CTL_ABPE;
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_PCP)
|
|
val |= PCIEM_SLOT_CTL_PFDE;
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_MRLSP)
|
|
val |= PCIEM_SLOT_CTL_MRLSCE;
|
|
if (!(sc->pcie_slot_cap & PCIEM_SLOT_CAP_NCCS))
|
|
val |= PCIEM_SLOT_CTL_CCIE;
|
|
|
|
/* Turn the attention indicator off. */
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_AIP) {
|
|
mask |= PCIEM_SLOT_CTL_AIC;
|
|
val |= PCIEM_SLOT_CTL_AI_OFF;
|
|
}
|
|
|
|
pcib_pcie_hotplug_update(sc, val, mask, false);
|
|
}
|
|
|
|
static int
|
|
pcib_detach_hotplug(struct pcib_softc *sc)
|
|
{
|
|
uint16_t mask, val;
|
|
int error;
|
|
|
|
/* Disable the card in the slot and force it to detach. */
|
|
if (sc->flags & PCIB_DETACH_PENDING) {
|
|
sc->flags &= ~PCIB_DETACH_PENDING;
|
|
taskqueue_cancel_timeout(taskqueue_pci_hp, &sc->pcie_ab_task,
|
|
NULL);
|
|
}
|
|
sc->flags |= PCIB_DETACHING;
|
|
|
|
if (sc->flags & PCIB_HOTPLUG_CMD_PENDING) {
|
|
taskqueue_cancel_timeout(taskqueue_pci_hp, &sc->pcie_cc_task,
|
|
NULL);
|
|
tsleep(sc, 0, "hpcmd", hz);
|
|
sc->flags &= ~PCIB_HOTPLUG_CMD_PENDING;
|
|
}
|
|
|
|
/* Disable HotPlug events. */
|
|
mask = PCIEM_SLOT_CTL_DLLSCE | PCIEM_SLOT_CTL_HPIE |
|
|
PCIEM_SLOT_CTL_CCIE | PCIEM_SLOT_CTL_PDCE | PCIEM_SLOT_CTL_MRLSCE |
|
|
PCIEM_SLOT_CTL_PFDE | PCIEM_SLOT_CTL_ABPE;
|
|
val = 0;
|
|
|
|
/* Turn the attention indicator off. */
|
|
if (sc->pcie_slot_cap & PCIEM_SLOT_CAP_AIP) {
|
|
mask |= PCIEM_SLOT_CTL_AIC;
|
|
val |= PCIEM_SLOT_CTL_AI_OFF;
|
|
}
|
|
|
|
pcib_pcie_hotplug_update(sc, val, mask, false);
|
|
|
|
error = pcib_release_pcie_irq(sc);
|
|
if (error)
|
|
return (error);
|
|
taskqueue_drain(taskqueue_pci_hp, &sc->pcie_hp_task);
|
|
taskqueue_drain_timeout(taskqueue_pci_hp, &sc->pcie_ab_task);
|
|
taskqueue_drain_timeout(taskqueue_pci_hp, &sc->pcie_cc_task);
|
|
taskqueue_drain_timeout(taskqueue_pci_hp, &sc->pcie_dll_task);
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Get current bridge configuration.
|
|
*/
|
|
static void
|
|
pcib_cfg_save(struct pcib_softc *sc)
|
|
{
|
|
#ifndef NEW_PCIB
|
|
device_t dev;
|
|
uint16_t command;
|
|
|
|
dev = sc->dev;
|
|
|
|
command = pci_read_config(dev, PCIR_COMMAND, 2);
|
|
if (command & PCIM_CMD_PORTEN)
|
|
pcib_get_io_decode(sc);
|
|
if (command & PCIM_CMD_MEMEN)
|
|
pcib_get_mem_decode(sc);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Restore previous bridge configuration.
|
|
*/
|
|
static void
|
|
pcib_cfg_restore(struct pcib_softc *sc)
|
|
{
|
|
#ifndef NEW_PCIB
|
|
uint16_t command;
|
|
#endif
|
|
|
|
#ifdef NEW_PCIB
|
|
pcib_write_windows(sc, WIN_IO | WIN_MEM | WIN_PMEM);
|
|
#else
|
|
command = pci_read_config(sc->dev, PCIR_COMMAND, 2);
|
|
if (command & PCIM_CMD_PORTEN)
|
|
pcib_set_io_decode(sc);
|
|
if (command & PCIM_CMD_MEMEN)
|
|
pcib_set_mem_decode(sc);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Generic device interface
|
|
*/
|
|
static int
|
|
pcib_probe(device_t dev)
|
|
{
|
|
if ((pci_get_class(dev) == PCIC_BRIDGE) &&
|
|
(pci_get_subclass(dev) == PCIS_BRIDGE_PCI)) {
|
|
device_set_desc(dev, "PCI-PCI bridge");
|
|
return(-10000);
|
|
}
|
|
return(ENXIO);
|
|
}
|
|
|
|
void
|
|
pcib_attach_common(device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
struct sysctl_ctx_list *sctx;
|
|
struct sysctl_oid *soid;
|
|
int comma;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
|
|
/*
|
|
* Get current bridge configuration.
|
|
*/
|
|
sc->domain = pci_get_domain(dev);
|
|
#if !(defined(NEW_PCIB) && defined(PCI_RES_BUS))
|
|
sc->bus.sec = pci_read_config(dev, PCIR_SECBUS_1, 1);
|
|
sc->bus.sub = pci_read_config(dev, PCIR_SUBBUS_1, 1);
|
|
#endif
|
|
sc->bridgectl = pci_read_config(dev, PCIR_BRIDGECTL_1, 2);
|
|
pcib_cfg_save(sc);
|
|
|
|
/*
|
|
* The primary bus register should always be the bus of the
|
|
* parent.
|
|
*/
|
|
sc->pribus = pci_get_bus(dev);
|
|
pci_write_config(dev, PCIR_PRIBUS_1, sc->pribus, 1);
|
|
|
|
/*
|
|
* Setup sysctl reporting nodes
|
|
*/
|
|
sctx = device_get_sysctl_ctx(dev);
|
|
soid = device_get_sysctl_tree(dev);
|
|
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "domain",
|
|
CTLFLAG_RD, &sc->domain, 0, "Domain number");
|
|
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "pribus",
|
|
CTLFLAG_RD, &sc->pribus, 0, "Primary bus number");
|
|
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "secbus",
|
|
CTLFLAG_RD, &sc->bus.sec, 0, "Secondary bus number");
|
|
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
|
|
CTLFLAG_RD, &sc->bus.sub, 0, "Subordinate bus number");
|
|
|
|
/*
|
|
* Quirk handling.
|
|
*/
|
|
switch (pci_get_devid(dev)) {
|
|
#if !(defined(NEW_PCIB) && defined(PCI_RES_BUS))
|
|
case 0x12258086: /* Intel 82454KX/GX (Orion) */
|
|
{
|
|
uint8_t supbus;
|
|
|
|
supbus = pci_read_config(dev, 0x41, 1);
|
|
if (supbus != 0xff) {
|
|
sc->bus.sec = supbus + 1;
|
|
sc->bus.sub = supbus + 1;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* The i82380FB mobile docking controller is a PCI-PCI bridge,
|
|
* and it is a subtractive bridge. However, the ProgIf is wrong
|
|
* so the normal setting of PCIB_SUBTRACTIVE bit doesn't
|
|
* happen. There are also Toshiba and Cavium ThunderX bridges
|
|
* that behave this way.
|
|
*/
|
|
case 0xa002177d: /* Cavium ThunderX */
|
|
case 0x124b8086: /* Intel 82380FB Mobile */
|
|
case 0x060513d7: /* Toshiba ???? */
|
|
sc->flags |= PCIB_SUBTRACTIVE;
|
|
break;
|
|
|
|
#if !(defined(NEW_PCIB) && defined(PCI_RES_BUS))
|
|
/* Compaq R3000 BIOS sets wrong subordinate bus number. */
|
|
case 0x00dd10de:
|
|
{
|
|
char *cp;
|
|
|
|
if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
|
|
break;
|
|
if (strncmp(cp, "Compal", 6) != 0) {
|
|
freeenv(cp);
|
|
break;
|
|
}
|
|
freeenv(cp);
|
|
if ((cp = kern_getenv("smbios.planar.product")) == NULL)
|
|
break;
|
|
if (strncmp(cp, "08A0", 4) != 0) {
|
|
freeenv(cp);
|
|
break;
|
|
}
|
|
freeenv(cp);
|
|
if (sc->bus.sub < 0xa) {
|
|
pci_write_config(dev, PCIR_SUBBUS_1, 0xa, 1);
|
|
sc->bus.sub = pci_read_config(dev, PCIR_SUBBUS_1, 1);
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (pci_msi_device_blacklisted(dev))
|
|
sc->flags |= PCIB_DISABLE_MSI;
|
|
|
|
if (pci_msix_device_blacklisted(dev))
|
|
sc->flags |= PCIB_DISABLE_MSIX;
|
|
|
|
/*
|
|
* Intel 815, 845 and other chipsets say they are PCI-PCI bridges,
|
|
* but have a ProgIF of 0x80. The 82801 family (AA, AB, BAM/CAM,
|
|
* BA/CA/DB and E) PCI bridges are HUB-PCI bridges, in Intelese.
|
|
* This means they act as if they were subtractively decoding
|
|
* bridges and pass all transactions. Mark them and real ProgIf 1
|
|
* parts as subtractive.
|
|
*/
|
|
if ((pci_get_devid(dev) & 0xff00ffff) == 0x24008086 ||
|
|
pci_read_config(dev, PCIR_PROGIF, 1) == PCIP_BRIDGE_PCI_SUBTRACTIVE)
|
|
sc->flags |= PCIB_SUBTRACTIVE;
|
|
|
|
#ifdef PCI_HP
|
|
pcib_probe_hotplug(sc);
|
|
#endif
|
|
#ifdef NEW_PCIB
|
|
#ifdef PCI_RES_BUS
|
|
pcib_setup_secbus(dev, &sc->bus, 1);
|
|
#endif
|
|
pcib_probe_windows(sc);
|
|
#endif
|
|
#ifdef PCI_HP
|
|
if (sc->flags & PCIB_HOTPLUG)
|
|
pcib_setup_hotplug(sc);
|
|
#endif
|
|
if (bootverbose) {
|
|
device_printf(dev, " domain %d\n", sc->domain);
|
|
device_printf(dev, " secondary bus %d\n", sc->bus.sec);
|
|
device_printf(dev, " subordinate bus %d\n", sc->bus.sub);
|
|
#ifdef NEW_PCIB
|
|
if (pcib_is_window_open(&sc->io))
|
|
device_printf(dev, " I/O decode 0x%jx-0x%jx\n",
|
|
(uintmax_t)sc->io.base, (uintmax_t)sc->io.limit);
|
|
if (pcib_is_window_open(&sc->mem))
|
|
device_printf(dev, " memory decode 0x%jx-0x%jx\n",
|
|
(uintmax_t)sc->mem.base, (uintmax_t)sc->mem.limit);
|
|
if (pcib_is_window_open(&sc->pmem))
|
|
device_printf(dev, " prefetched decode 0x%jx-0x%jx\n",
|
|
(uintmax_t)sc->pmem.base, (uintmax_t)sc->pmem.limit);
|
|
#else
|
|
if (pcib_is_io_open(sc))
|
|
device_printf(dev, " I/O decode 0x%x-0x%x\n",
|
|
sc->iobase, sc->iolimit);
|
|
if (pcib_is_nonprefetch_open(sc))
|
|
device_printf(dev, " memory decode 0x%jx-0x%jx\n",
|
|
(uintmax_t)sc->membase, (uintmax_t)sc->memlimit);
|
|
if (pcib_is_prefetch_open(sc))
|
|
device_printf(dev, " prefetched decode 0x%jx-0x%jx\n",
|
|
(uintmax_t)sc->pmembase, (uintmax_t)sc->pmemlimit);
|
|
#endif
|
|
if (sc->bridgectl & (PCIB_BCR_ISA_ENABLE | PCIB_BCR_VGA_ENABLE) ||
|
|
sc->flags & PCIB_SUBTRACTIVE) {
|
|
device_printf(dev, " special decode ");
|
|
comma = 0;
|
|
if (sc->bridgectl & PCIB_BCR_ISA_ENABLE) {
|
|
printf("ISA");
|
|
comma = 1;
|
|
}
|
|
if (sc->bridgectl & PCIB_BCR_VGA_ENABLE) {
|
|
printf("%sVGA", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (sc->flags & PCIB_SUBTRACTIVE)
|
|
printf("%ssubtractive", comma ? ", " : "");
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Always enable busmastering on bridges so that transactions
|
|
* initiated on the secondary bus are passed through to the
|
|
* primary bus.
|
|
*/
|
|
pci_enable_busmaster(dev);
|
|
}
|
|
|
|
#ifdef PCI_HP
|
|
static int
|
|
pcib_present(struct pcib_softc *sc)
|
|
{
|
|
|
|
if (sc->flags & PCIB_HOTPLUG)
|
|
return (pcib_hotplug_present(sc) != 0);
|
|
return (1);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
pcib_attach_child(device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (sc->bus.sec == 0) {
|
|
/* no secondary bus; we should have fixed this */
|
|
return(0);
|
|
}
|
|
|
|
#ifdef PCI_HP
|
|
if (!pcib_present(sc)) {
|
|
/* An empty HotPlug slot, so don't add a PCI bus yet. */
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
sc->child = device_add_child(dev, "pci", -1);
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
int
|
|
pcib_attach(device_t dev)
|
|
{
|
|
|
|
pcib_attach_common(dev);
|
|
return (pcib_attach_child(dev));
|
|
}
|
|
|
|
int
|
|
pcib_detach(device_t dev)
|
|
{
|
|
#if defined(PCI_HP) || defined(NEW_PCIB)
|
|
struct pcib_softc *sc;
|
|
#endif
|
|
int error;
|
|
|
|
#if defined(PCI_HP) || defined(NEW_PCIB)
|
|
sc = device_get_softc(dev);
|
|
#endif
|
|
error = bus_generic_detach(dev);
|
|
if (error)
|
|
return (error);
|
|
#ifdef PCI_HP
|
|
if (sc->flags & PCIB_HOTPLUG) {
|
|
error = pcib_detach_hotplug(sc);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
#endif
|
|
error = device_delete_children(dev);
|
|
if (error)
|
|
return (error);
|
|
#ifdef NEW_PCIB
|
|
pcib_free_windows(sc);
|
|
#ifdef PCI_RES_BUS
|
|
pcib_free_secbus(dev, &sc->bus);
|
|
#endif
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pcib_suspend(device_t dev)
|
|
{
|
|
|
|
pcib_cfg_save(device_get_softc(dev));
|
|
return (bus_generic_suspend(dev));
|
|
}
|
|
|
|
int
|
|
pcib_resume(device_t dev)
|
|
{
|
|
|
|
pcib_cfg_restore(device_get_softc(dev));
|
|
|
|
/*
|
|
* Restore the Command register only after restoring the windows.
|
|
* The bridge should not be claiming random windows.
|
|
*/
|
|
pci_write_config(dev, PCIR_COMMAND, pci_get_cmdreg(dev), 2);
|
|
return (bus_generic_resume(dev));
|
|
}
|
|
|
|
void
|
|
pcib_bridge_init(device_t dev)
|
|
{
|
|
pci_write_config(dev, PCIR_IOBASEL_1, 0xff, 1);
|
|
pci_write_config(dev, PCIR_IOBASEH_1, 0xffff, 2);
|
|
pci_write_config(dev, PCIR_IOLIMITL_1, 0, 1);
|
|
pci_write_config(dev, PCIR_IOLIMITH_1, 0, 2);
|
|
pci_write_config(dev, PCIR_MEMBASE_1, 0xffff, 2);
|
|
pci_write_config(dev, PCIR_MEMLIMIT_1, 0, 2);
|
|
pci_write_config(dev, PCIR_PMBASEL_1, 0xffff, 2);
|
|
pci_write_config(dev, PCIR_PMBASEH_1, 0xffffffff, 4);
|
|
pci_write_config(dev, PCIR_PMLIMITL_1, 0, 2);
|
|
pci_write_config(dev, PCIR_PMLIMITH_1, 0, 4);
|
|
}
|
|
|
|
int
|
|
pcib_child_present(device_t dev, device_t child)
|
|
{
|
|
#ifdef PCI_HP
|
|
struct pcib_softc *sc = device_get_softc(dev);
|
|
int retval;
|
|
|
|
retval = bus_child_present(dev);
|
|
if (retval != 0 && sc->flags & PCIB_HOTPLUG)
|
|
retval = pcib_hotplug_present(sc);
|
|
return (retval);
|
|
#else
|
|
return (bus_child_present(dev));
|
|
#endif
|
|
}
|
|
|
|
int
|
|
pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
|
|
{
|
|
struct pcib_softc *sc = device_get_softc(dev);
|
|
|
|
switch (which) {
|
|
case PCIB_IVAR_DOMAIN:
|
|
*result = sc->domain;
|
|
return(0);
|
|
case PCIB_IVAR_BUS:
|
|
*result = sc->bus.sec;
|
|
return(0);
|
|
}
|
|
return(ENOENT);
|
|
}
|
|
|
|
int
|
|
pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
|
|
{
|
|
|
|
switch (which) {
|
|
case PCIB_IVAR_DOMAIN:
|
|
return(EINVAL);
|
|
case PCIB_IVAR_BUS:
|
|
return(EINVAL);
|
|
}
|
|
return(ENOENT);
|
|
}
|
|
|
|
#ifdef NEW_PCIB
|
|
/*
|
|
* Attempt to allocate a resource from the existing resources assigned
|
|
* to a window.
|
|
*/
|
|
static struct resource *
|
|
pcib_suballoc_resource(struct pcib_softc *sc, struct pcib_window *w,
|
|
device_t child, int type, int *rid, rman_res_t start, rman_res_t end,
|
|
rman_res_t count, u_int flags)
|
|
{
|
|
struct resource *res;
|
|
|
|
if (!pcib_is_window_open(w))
|
|
return (NULL);
|
|
|
|
res = rman_reserve_resource(&w->rman, start, end, count,
|
|
flags & ~RF_ACTIVE, child);
|
|
if (res == NULL)
|
|
return (NULL);
|
|
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"allocated %s range (%#jx-%#jx) for rid %x of %s\n",
|
|
w->name, rman_get_start(res), rman_get_end(res), *rid,
|
|
pcib_child_name(child));
|
|
rman_set_rid(res, *rid);
|
|
|
|
/*
|
|
* If the resource should be active, pass that request up the
|
|
* tree. This assumes the parent drivers can handle
|
|
* activating sub-allocated resources.
|
|
*/
|
|
if (flags & RF_ACTIVE) {
|
|
if (bus_activate_resource(child, type, *rid, res) != 0) {
|
|
rman_release_resource(res);
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
return (res);
|
|
}
|
|
|
|
/* Allocate a fresh resource range for an unconfigured window. */
|
|
static int
|
|
pcib_alloc_new_window(struct pcib_softc *sc, struct pcib_window *w, int type,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct resource *res;
|
|
rman_res_t base, limit, wmask;
|
|
int rid;
|
|
|
|
/*
|
|
* If this is an I/O window on a bridge with ISA enable set
|
|
* and the start address is below 64k, then try to allocate an
|
|
* initial window of 0x1000 bytes long starting at address
|
|
* 0xf000 and walking down. Note that if the original request
|
|
* was larger than the non-aliased range size of 0x100 our
|
|
* caller would have raised the start address up to 64k
|
|
* already.
|
|
*/
|
|
if (type == SYS_RES_IOPORT && sc->bridgectl & PCIB_BCR_ISA_ENABLE &&
|
|
start < 65536) {
|
|
for (base = 0xf000; (long)base >= 0; base -= 0x1000) {
|
|
limit = base + 0xfff;
|
|
|
|
/*
|
|
* Skip ranges that wouldn't work for the
|
|
* original request. Note that the actual
|
|
* window that overlaps are the non-alias
|
|
* ranges within [base, limit], so this isn't
|
|
* quite a simple comparison.
|
|
*/
|
|
if (start + count > limit - 0x400)
|
|
continue;
|
|
if (base == 0) {
|
|
/*
|
|
* The first open region for the window at
|
|
* 0 is 0x400-0x4ff.
|
|
*/
|
|
if (end - count + 1 < 0x400)
|
|
continue;
|
|
} else {
|
|
if (end - count + 1 < base)
|
|
continue;
|
|
}
|
|
|
|
if (pcib_alloc_nonisa_ranges(sc, base, limit) == 0) {
|
|
w->base = base;
|
|
w->limit = limit;
|
|
return (0);
|
|
}
|
|
}
|
|
return (ENOSPC);
|
|
}
|
|
|
|
wmask = ((rman_res_t)1 << w->step) - 1;
|
|
if (RF_ALIGNMENT(flags) < w->step) {
|
|
flags &= ~RF_ALIGNMENT_MASK;
|
|
flags |= RF_ALIGNMENT_LOG2(w->step);
|
|
}
|
|
start &= ~wmask;
|
|
end |= wmask;
|
|
count = roundup2(count, (rman_res_t)1 << w->step);
|
|
rid = w->reg;
|
|
res = bus_alloc_resource(sc->dev, type, &rid, start, end, count,
|
|
flags & ~RF_ACTIVE);
|
|
if (res == NULL)
|
|
return (ENOSPC);
|
|
pcib_add_window_resources(w, &res, 1);
|
|
pcib_activate_window(sc, type);
|
|
w->base = rman_get_start(res);
|
|
w->limit = rman_get_end(res);
|
|
return (0);
|
|
}
|
|
|
|
/* Try to expand an existing window to the requested base and limit. */
|
|
static int
|
|
pcib_expand_window(struct pcib_softc *sc, struct pcib_window *w, int type,
|
|
rman_res_t base, rman_res_t limit)
|
|
{
|
|
struct resource *res;
|
|
int error, i, force_64k_base;
|
|
|
|
KASSERT(base <= w->base && limit >= w->limit,
|
|
("attempting to shrink window"));
|
|
|
|
/*
|
|
* XXX: pcib_grow_window() doesn't try to do this anyway and
|
|
* the error handling for all the edge cases would be tedious.
|
|
*/
|
|
KASSERT(limit == w->limit || base == w->base,
|
|
("attempting to grow both ends of a window"));
|
|
|
|
/*
|
|
* Yet more special handling for requests to expand an I/O
|
|
* window behind an ISA-enabled bridge. Since I/O windows
|
|
* have to grow in 0x1000 increments and the end of the 0xffff
|
|
* range is an alias, growing a window below 64k will always
|
|
* result in allocating new resources and never adjusting an
|
|
* existing resource.
|
|
*/
|
|
if (type == SYS_RES_IOPORT && sc->bridgectl & PCIB_BCR_ISA_ENABLE &&
|
|
(limit <= 65535 || (base <= 65535 && base != w->base))) {
|
|
KASSERT(limit == w->limit || limit <= 65535,
|
|
("attempting to grow both ends across 64k ISA alias"));
|
|
|
|
if (base != w->base)
|
|
error = pcib_alloc_nonisa_ranges(sc, base, w->base - 1);
|
|
else
|
|
error = pcib_alloc_nonisa_ranges(sc, w->limit + 1,
|
|
limit);
|
|
if (error == 0) {
|
|
w->base = base;
|
|
w->limit = limit;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Find the existing resource to adjust. Usually there is only one,
|
|
* but for an ISA-enabled bridge we might be growing the I/O window
|
|
* above 64k and need to find the existing resource that maps all
|
|
* of the area above 64k.
|
|
*/
|
|
for (i = 0; i < w->count; i++) {
|
|
if (rman_get_end(w->res[i]) == w->limit)
|
|
break;
|
|
}
|
|
KASSERT(i != w->count, ("did not find existing resource"));
|
|
res = w->res[i];
|
|
|
|
/*
|
|
* Usually the resource we found should match the window's
|
|
* existing range. The one exception is the ISA-enabled case
|
|
* mentioned above in which case the resource should start at
|
|
* 64k.
|
|
*/
|
|
if (type == SYS_RES_IOPORT && sc->bridgectl & PCIB_BCR_ISA_ENABLE &&
|
|
w->base <= 65535) {
|
|
KASSERT(rman_get_start(res) == 65536,
|
|
("existing resource mismatch"));
|
|
force_64k_base = 1;
|
|
} else {
|
|
KASSERT(w->base == rman_get_start(res),
|
|
("existing resource mismatch"));
|
|
force_64k_base = 0;
|
|
}
|
|
|
|
error = bus_adjust_resource(sc->dev, type, res, force_64k_base ?
|
|
rman_get_start(res) : base, limit);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Add the newly allocated region to the resource manager. */
|
|
if (w->base != base) {
|
|
error = rman_manage_region(&w->rman, base, w->base - 1);
|
|
w->base = base;
|
|
} else {
|
|
error = rman_manage_region(&w->rman, w->limit + 1, limit);
|
|
w->limit = limit;
|
|
}
|
|
if (error) {
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"failed to expand %s resource manager\n", w->name);
|
|
(void)bus_adjust_resource(sc->dev, type, res, force_64k_base ?
|
|
rman_get_start(res) : w->base, w->limit);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Attempt to grow a window to make room for a given resource request.
|
|
*/
|
|
static int
|
|
pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
rman_res_t align, start_free, end_free, front, back, wmask;
|
|
int error;
|
|
|
|
/*
|
|
* Clamp the desired resource range to the maximum address
|
|
* this window supports. Reject impossible requests.
|
|
*
|
|
* For I/O port requests behind a bridge with the ISA enable
|
|
* bit set, force large allocations to start above 64k.
|
|
*/
|
|
if (!w->valid)
|
|
return (EINVAL);
|
|
if (sc->bridgectl & PCIB_BCR_ISA_ENABLE && count > 0x100 &&
|
|
start < 65536)
|
|
start = 65536;
|
|
if (end > w->rman.rm_end)
|
|
end = w->rman.rm_end;
|
|
if (start + count - 1 > end || start + count < start)
|
|
return (EINVAL);
|
|
wmask = ((rman_res_t)1 << w->step) - 1;
|
|
|
|
/*
|
|
* If there is no resource at all, just try to allocate enough
|
|
* aligned space for this resource.
|
|
*/
|
|
if (w->res == NULL) {
|
|
error = pcib_alloc_new_window(sc, w, type, start, end, count,
|
|
flags);
|
|
if (error) {
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"failed to allocate initial %s window (%#jx-%#jx,%#jx)\n",
|
|
w->name, start, end, count);
|
|
return (error);
|
|
}
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"allocated initial %s window of %#jx-%#jx\n",
|
|
w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
|
|
goto updatewin;
|
|
}
|
|
|
|
/*
|
|
* See if growing the window would help. Compute the minimum
|
|
* amount of address space needed on both the front and back
|
|
* ends of the existing window to satisfy the allocation.
|
|
*
|
|
* For each end, build a candidate region adjusting for the
|
|
* required alignment, etc. If there is a free region at the
|
|
* edge of the window, grow from the inner edge of the free
|
|
* region. Otherwise grow from the window boundary.
|
|
*
|
|
* Growing an I/O window below 64k for a bridge with the ISA
|
|
* enable bit doesn't require any special magic as the step
|
|
* size of an I/O window (1k) always includes multiple
|
|
* non-alias ranges when it is grown in either direction.
|
|
*
|
|
* XXX: Special case: if w->res is completely empty and the
|
|
* request size is larger than w->res, we should find the
|
|
* optimal aligned buffer containing w->res and allocate that.
|
|
*/
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"attempting to grow %s window for (%#jx-%#jx,%#jx)\n",
|
|
w->name, start, end, count);
|
|
align = (rman_res_t)1 << RF_ALIGNMENT(flags);
|
|
if (start < w->base) {
|
|
if (rman_first_free_region(&w->rman, &start_free, &end_free) !=
|
|
0 || start_free != w->base)
|
|
end_free = w->base;
|
|
if (end_free > end)
|
|
end_free = end + 1;
|
|
|
|
/* Move end_free down until it is properly aligned. */
|
|
end_free &= ~(align - 1);
|
|
end_free--;
|
|
front = end_free - (count - 1);
|
|
|
|
/*
|
|
* The resource would now be allocated at (front,
|
|
* end_free). Ensure that fits in the (start, end)
|
|
* bounds. end_free is checked above. If 'front' is
|
|
* ok, ensure it is properly aligned for this window.
|
|
* Also check for underflow.
|
|
*/
|
|
if (front >= start && front <= end_free) {
|
|
if (bootverbose)
|
|
printf("\tfront candidate range: %#jx-%#jx\n",
|
|
front, end_free);
|
|
front &= ~wmask;
|
|
front = w->base - front;
|
|
} else
|
|
front = 0;
|
|
} else
|
|
front = 0;
|
|
if (end > w->limit) {
|
|
if (rman_last_free_region(&w->rman, &start_free, &end_free) !=
|
|
0 || end_free != w->limit)
|
|
start_free = w->limit + 1;
|
|
if (start_free < start)
|
|
start_free = start;
|
|
|
|
/* Move start_free up until it is properly aligned. */
|
|
start_free = roundup2(start_free, align);
|
|
back = start_free + count - 1;
|
|
|
|
/*
|
|
* The resource would now be allocated at (start_free,
|
|
* back). Ensure that fits in the (start, end)
|
|
* bounds. start_free is checked above. If 'back' is
|
|
* ok, ensure it is properly aligned for this window.
|
|
* Also check for overflow.
|
|
*/
|
|
if (back <= end && start_free <= back) {
|
|
if (bootverbose)
|
|
printf("\tback candidate range: %#jx-%#jx\n",
|
|
start_free, back);
|
|
back |= wmask;
|
|
back -= w->limit;
|
|
} else
|
|
back = 0;
|
|
} else
|
|
back = 0;
|
|
|
|
/*
|
|
* Try to allocate the smallest needed region first.
|
|
* If that fails, fall back to the other region.
|
|
*/
|
|
error = ENOSPC;
|
|
while (front != 0 || back != 0) {
|
|
if (front != 0 && (front <= back || back == 0)) {
|
|
error = pcib_expand_window(sc, w, type, w->base - front,
|
|
w->limit);
|
|
if (error == 0)
|
|
break;
|
|
front = 0;
|
|
} else {
|
|
error = pcib_expand_window(sc, w, type, w->base,
|
|
w->limit + back);
|
|
if (error == 0)
|
|
break;
|
|
back = 0;
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
return (error);
|
|
if (bootverbose)
|
|
device_printf(sc->dev, "grew %s window to %#jx-%#jx\n",
|
|
w->name, (uintmax_t)w->base, (uintmax_t)w->limit);
|
|
|
|
updatewin:
|
|
/* Write the new window. */
|
|
KASSERT((w->base & wmask) == 0, ("start address is not aligned"));
|
|
KASSERT((w->limit & wmask) == wmask, ("end address is not aligned"));
|
|
pcib_write_windows(sc, w->mask);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We have to trap resource allocation requests and ensure that the bridge
|
|
* is set up to, or capable of handling them.
|
|
*/
|
|
struct resource *
|
|
pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct pcib_softc *sc;
|
|
struct resource *r;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
/*
|
|
* VGA resources are decoded iff the VGA enable bit is set in
|
|
* the bridge control register. VGA resources do not fall into
|
|
* the resource windows and are passed up to the parent.
|
|
*/
|
|
if ((type == SYS_RES_IOPORT && pci_is_vga_ioport_range(start, end)) ||
|
|
(type == SYS_RES_MEMORY && pci_is_vga_memory_range(start, end))) {
|
|
if (sc->bridgectl & PCIB_BCR_VGA_ENABLE)
|
|
return (bus_generic_alloc_resource(dev, child, type,
|
|
rid, start, end, count, flags));
|
|
else
|
|
return (NULL);
|
|
}
|
|
|
|
switch (type) {
|
|
#ifdef PCI_RES_BUS
|
|
case PCI_RES_BUS:
|
|
return (pcib_alloc_subbus(&sc->bus, child, rid, start, end,
|
|
count, flags));
|
|
#endif
|
|
case SYS_RES_IOPORT:
|
|
if (pcib_is_isa_range(sc, start, end, count))
|
|
return (NULL);
|
|
r = pcib_suballoc_resource(sc, &sc->io, child, type, rid, start,
|
|
end, count, flags);
|
|
if (r != NULL || (sc->flags & PCIB_SUBTRACTIVE) != 0)
|
|
break;
|
|
if (pcib_grow_window(sc, &sc->io, type, start, end, count,
|
|
flags) == 0)
|
|
r = pcib_suballoc_resource(sc, &sc->io, child, type,
|
|
rid, start, end, count, flags);
|
|
break;
|
|
case SYS_RES_MEMORY:
|
|
/*
|
|
* For prefetchable resources, prefer the prefetchable
|
|
* memory window, but fall back to the regular memory
|
|
* window if that fails. Try both windows before
|
|
* attempting to grow a window in case the firmware
|
|
* has used a range in the regular memory window to
|
|
* map a prefetchable BAR.
|
|
*/
|
|
if (flags & RF_PREFETCHABLE) {
|
|
r = pcib_suballoc_resource(sc, &sc->pmem, child, type,
|
|
rid, start, end, count, flags);
|
|
if (r != NULL)
|
|
break;
|
|
}
|
|
r = pcib_suballoc_resource(sc, &sc->mem, child, type, rid,
|
|
start, end, count, flags);
|
|
if (r != NULL || (sc->flags & PCIB_SUBTRACTIVE) != 0)
|
|
break;
|
|
if (flags & RF_PREFETCHABLE) {
|
|
if (pcib_grow_window(sc, &sc->pmem, type, start, end,
|
|
count, flags) == 0) {
|
|
r = pcib_suballoc_resource(sc, &sc->pmem, child,
|
|
type, rid, start, end, count, flags);
|
|
if (r != NULL)
|
|
break;
|
|
}
|
|
}
|
|
if (pcib_grow_window(sc, &sc->mem, type, start, end, count,
|
|
flags & ~RF_PREFETCHABLE) == 0)
|
|
r = pcib_suballoc_resource(sc, &sc->mem, child, type,
|
|
rid, start, end, count, flags);
|
|
break;
|
|
default:
|
|
return (bus_generic_alloc_resource(dev, child, type, rid,
|
|
start, end, count, flags));
|
|
}
|
|
|
|
/*
|
|
* If attempts to suballocate from the window fail but this is a
|
|
* subtractive bridge, pass the request up the tree.
|
|
*/
|
|
if (sc->flags & PCIB_SUBTRACTIVE && r == NULL)
|
|
return (bus_generic_alloc_resource(dev, child, type, rid,
|
|
start, end, count, flags));
|
|
return (r);
|
|
}
|
|
|
|
int
|
|
pcib_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
|
|
rman_res_t start, rman_res_t end)
|
|
{
|
|
struct pcib_softc *sc;
|
|
struct pcib_window *w;
|
|
rman_res_t wmask;
|
|
int error;
|
|
|
|
sc = device_get_softc(bus);
|
|
|
|
/*
|
|
* If the resource wasn't sub-allocated from one of our region
|
|
* managers then just pass the request up.
|
|
*/
|
|
if (!pcib_is_resource_managed(sc, type, r))
|
|
return (bus_generic_adjust_resource(bus, child, type, r,
|
|
start, end));
|
|
|
|
#ifdef PCI_RES_BUS
|
|
if (type == PCI_RES_BUS) {
|
|
/*
|
|
* If our bus range isn't big enough to grow the sub-allocation
|
|
* then we need to grow our bus range. Any request that would
|
|
* require us to decrease the start of our own bus range is
|
|
* invalid, we can only extend the end; ignore such requests
|
|
* and let rman_adjust_resource fail below.
|
|
*/
|
|
if (start >= sc->bus.sec && end > sc->bus.sub) {
|
|
error = pcib_grow_subbus(&sc->bus, end);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
/*
|
|
* Resource is managed and not a secondary bus number, must
|
|
* be from one of our windows.
|
|
*/
|
|
w = pcib_get_resource_window(sc, type, r);
|
|
KASSERT(w != NULL,
|
|
("%s: no window for resource (%#jx-%#jx) type %d",
|
|
__func__, rman_get_start(r), rman_get_end(r), type));
|
|
|
|
/*
|
|
* If our window isn't big enough to grow the sub-allocation
|
|
* then we need to expand the window.
|
|
*/
|
|
if (start < w->base || end > w->limit) {
|
|
wmask = ((rman_res_t)1 << w->step) - 1;
|
|
error = pcib_expand_window(sc, w, type,
|
|
MIN(start & ~wmask, w->base),
|
|
MAX(end | wmask, w->limit));
|
|
if (error != 0)
|
|
return (error);
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"grew %s window to %#jx-%#jx\n",
|
|
w->name, (uintmax_t)w->base,
|
|
(uintmax_t)w->limit);
|
|
pcib_write_windows(sc, w->mask);
|
|
}
|
|
}
|
|
|
|
return (rman_adjust_resource(r, start, end));
|
|
}
|
|
|
|
int
|
|
pcib_release_resource(device_t dev, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
struct pcib_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (pcib_is_resource_managed(sc, type, r)) {
|
|
if (rman_get_flags(r) & RF_ACTIVE) {
|
|
error = bus_deactivate_resource(child, type, rid, r);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
return (rman_release_resource(r));
|
|
}
|
|
return (bus_generic_release_resource(dev, child, type, rid, r));
|
|
}
|
|
#else
|
|
/*
|
|
* We have to trap resource allocation requests and ensure that the bridge
|
|
* is set up to, or capable of handling them.
|
|
*/
|
|
struct resource *
|
|
pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct pcib_softc *sc = device_get_softc(dev);
|
|
const char *name, *suffix;
|
|
int ok;
|
|
|
|
/*
|
|
* Fail the allocation for this range if it's not supported.
|
|
*/
|
|
name = device_get_nameunit(child);
|
|
if (name == NULL) {
|
|
name = "";
|
|
suffix = "";
|
|
} else
|
|
suffix = " ";
|
|
switch (type) {
|
|
case SYS_RES_IOPORT:
|
|
ok = 0;
|
|
if (!pcib_is_io_open(sc))
|
|
break;
|
|
ok = (start >= sc->iobase && end <= sc->iolimit);
|
|
|
|
/*
|
|
* Make sure we allow access to VGA I/O addresses when the
|
|
* bridge has the "VGA Enable" bit set.
|
|
*/
|
|
if (!ok && pci_is_vga_ioport_range(start, end))
|
|
ok = (sc->bridgectl & PCIB_BCR_VGA_ENABLE) ? 1 : 0;
|
|
|
|
if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
|
|
if (!ok) {
|
|
if (start < sc->iobase)
|
|
start = sc->iobase;
|
|
if (end > sc->iolimit)
|
|
end = sc->iolimit;
|
|
if (start < end)
|
|
ok = 1;
|
|
}
|
|
} else {
|
|
ok = 1;
|
|
#if 0
|
|
/*
|
|
* If we overlap with the subtractive range, then
|
|
* pick the upper range to use.
|
|
*/
|
|
if (start < sc->iolimit && end > sc->iobase)
|
|
start = sc->iolimit + 1;
|
|
#endif
|
|
}
|
|
if (end < start) {
|
|
device_printf(dev, "ioport: end (%jx) < start (%jx)\n",
|
|
end, start);
|
|
start = 0;
|
|
end = 0;
|
|
ok = 0;
|
|
}
|
|
if (!ok) {
|
|
device_printf(dev, "%s%srequested unsupported I/O "
|
|
"range 0x%jx-0x%jx (decoding 0x%x-0x%x)\n",
|
|
name, suffix, start, end, sc->iobase, sc->iolimit);
|
|
return (NULL);
|
|
}
|
|
if (bootverbose)
|
|
device_printf(dev,
|
|
"%s%srequested I/O range 0x%jx-0x%jx: in range\n",
|
|
name, suffix, start, end);
|
|
break;
|
|
|
|
case SYS_RES_MEMORY:
|
|
ok = 0;
|
|
if (pcib_is_nonprefetch_open(sc))
|
|
ok = ok || (start >= sc->membase && end <= sc->memlimit);
|
|
if (pcib_is_prefetch_open(sc))
|
|
ok = ok || (start >= sc->pmembase && end <= sc->pmemlimit);
|
|
|
|
/*
|
|
* Make sure we allow access to VGA memory addresses when the
|
|
* bridge has the "VGA Enable" bit set.
|
|
*/
|
|
if (!ok && pci_is_vga_memory_range(start, end))
|
|
ok = (sc->bridgectl & PCIB_BCR_VGA_ENABLE) ? 1 : 0;
|
|
|
|
if ((sc->flags & PCIB_SUBTRACTIVE) == 0) {
|
|
if (!ok) {
|
|
ok = 1;
|
|
if (flags & RF_PREFETCHABLE) {
|
|
if (pcib_is_prefetch_open(sc)) {
|
|
if (start < sc->pmembase)
|
|
start = sc->pmembase;
|
|
if (end > sc->pmemlimit)
|
|
end = sc->pmemlimit;
|
|
} else {
|
|
ok = 0;
|
|
}
|
|
} else { /* non-prefetchable */
|
|
if (pcib_is_nonprefetch_open(sc)) {
|
|
if (start < sc->membase)
|
|
start = sc->membase;
|
|
if (end > sc->memlimit)
|
|
end = sc->memlimit;
|
|
} else {
|
|
ok = 0;
|
|
}
|
|
}
|
|
}
|
|
} else if (!ok) {
|
|
ok = 1; /* subtractive bridge: always ok */
|
|
#if 0
|
|
if (pcib_is_nonprefetch_open(sc)) {
|
|
if (start < sc->memlimit && end > sc->membase)
|
|
start = sc->memlimit + 1;
|
|
}
|
|
if (pcib_is_prefetch_open(sc)) {
|
|
if (start < sc->pmemlimit && end > sc->pmembase)
|
|
start = sc->pmemlimit + 1;
|
|
}
|
|
#endif
|
|
}
|
|
if (end < start) {
|
|
device_printf(dev, "memory: end (%jx) < start (%jx)\n",
|
|
end, start);
|
|
start = 0;
|
|
end = 0;
|
|
ok = 0;
|
|
}
|
|
if (!ok && bootverbose)
|
|
device_printf(dev,
|
|
"%s%srequested unsupported memory range %#jx-%#jx "
|
|
"(decoding %#jx-%#jx, %#jx-%#jx)\n",
|
|
name, suffix, start, end,
|
|
(uintmax_t)sc->membase, (uintmax_t)sc->memlimit,
|
|
(uintmax_t)sc->pmembase, (uintmax_t)sc->pmemlimit);
|
|
if (!ok)
|
|
return (NULL);
|
|
if (bootverbose)
|
|
device_printf(dev,"%s%srequested memory range "
|
|
"0x%jx-0x%jx: good\n",
|
|
name, suffix, start, end);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
/*
|
|
* Bridge is OK decoding this resource, so pass it up.
|
|
*/
|
|
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
|
|
count, flags));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* If ARI is enabled on this downstream port, translate the function number
|
|
* to the non-ARI slot/function. The downstream port will convert it back in
|
|
* hardware. If ARI is not enabled slot and func are not modified.
|
|
*/
|
|
static __inline void
|
|
pcib_xlate_ari(device_t pcib, int bus, int *slot, int *func)
|
|
{
|
|
struct pcib_softc *sc;
|
|
int ari_func;
|
|
|
|
sc = device_get_softc(pcib);
|
|
ari_func = *func;
|
|
|
|
if (sc->flags & PCIB_ENABLE_ARI) {
|
|
KASSERT(*slot == 0,
|
|
("Non-zero slot number with ARI enabled!"));
|
|
*slot = PCIE_ARI_SLOT(ari_func);
|
|
*func = PCIE_ARI_FUNC(ari_func);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pcib_enable_ari(struct pcib_softc *sc, uint32_t pcie_pos)
|
|
{
|
|
uint32_t ctl2;
|
|
|
|
ctl2 = pci_read_config(sc->dev, pcie_pos + PCIER_DEVICE_CTL2, 4);
|
|
ctl2 |= PCIEM_CTL2_ARI;
|
|
pci_write_config(sc->dev, pcie_pos + PCIER_DEVICE_CTL2, ctl2, 4);
|
|
|
|
sc->flags |= PCIB_ENABLE_ARI;
|
|
}
|
|
|
|
/*
|
|
* PCIB interface.
|
|
*/
|
|
int
|
|
pcib_maxslots(device_t dev)
|
|
{
|
|
#if !defined(__amd64__) && !defined(__i386__)
|
|
uint32_t pcie_pos;
|
|
uint16_t val;
|
|
|
|
/*
|
|
* If this is a PCIe rootport or downstream switch port, there's only
|
|
* one slot permitted.
|
|
*/
|
|
if (pci_find_cap(dev, PCIY_EXPRESS, &pcie_pos) == 0) {
|
|
val = pci_read_config(dev, pcie_pos + PCIER_FLAGS, 2);
|
|
val &= PCIEM_FLAGS_TYPE;
|
|
if (val == PCIEM_TYPE_ROOT_PORT ||
|
|
val == PCIEM_TYPE_DOWNSTREAM_PORT)
|
|
return (0);
|
|
}
|
|
#endif
|
|
return (PCI_SLOTMAX);
|
|
}
|
|
|
|
static int
|
|
pcib_ari_maxslots(device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (sc->flags & PCIB_ENABLE_ARI)
|
|
return (PCIE_ARI_SLOTMAX);
|
|
else
|
|
return (pcib_maxslots(dev));
|
|
}
|
|
|
|
static int
|
|
pcib_ari_maxfuncs(device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (sc->flags & PCIB_ENABLE_ARI)
|
|
return (PCIE_ARI_FUNCMAX);
|
|
else
|
|
return (PCI_FUNCMAX);
|
|
}
|
|
|
|
static void
|
|
pcib_ari_decode_rid(device_t pcib, uint16_t rid, int *bus, int *slot,
|
|
int *func)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(pcib);
|
|
|
|
*bus = PCI_RID2BUS(rid);
|
|
if (sc->flags & PCIB_ENABLE_ARI) {
|
|
*slot = PCIE_ARI_RID2SLOT(rid);
|
|
*func = PCIE_ARI_RID2FUNC(rid);
|
|
} else {
|
|
*slot = PCI_RID2SLOT(rid);
|
|
*func = PCI_RID2FUNC(rid);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Since we are a child of a PCI bus, its parent must support the pcib interface.
|
|
*/
|
|
static uint32_t
|
|
pcib_read_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, int width)
|
|
{
|
|
#ifdef PCI_HP
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (!pcib_present(sc)) {
|
|
switch (width) {
|
|
case 2:
|
|
return (0xffff);
|
|
case 1:
|
|
return (0xff);
|
|
default:
|
|
return (0xffffffff);
|
|
}
|
|
}
|
|
#endif
|
|
pcib_xlate_ari(dev, b, &s, &f);
|
|
return(PCIB_READ_CONFIG(device_get_parent(device_get_parent(dev)), b, s,
|
|
f, reg, width));
|
|
}
|
|
|
|
static void
|
|
pcib_write_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, uint32_t val, int width)
|
|
{
|
|
#ifdef PCI_HP
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (!pcib_present(sc))
|
|
return;
|
|
#endif
|
|
pcib_xlate_ari(dev, b, &s, &f);
|
|
PCIB_WRITE_CONFIG(device_get_parent(device_get_parent(dev)), b, s, f,
|
|
reg, val, width);
|
|
}
|
|
|
|
/*
|
|
* Route an interrupt across a PCI bridge.
|
|
*/
|
|
int
|
|
pcib_route_interrupt(device_t pcib, device_t dev, int pin)
|
|
{
|
|
device_t bus;
|
|
int parent_intpin;
|
|
int intnum;
|
|
|
|
/*
|
|
*
|
|
* The PCI standard defines a swizzle of the child-side device/intpin to
|
|
* the parent-side intpin as follows.
|
|
*
|
|
* device = device on child bus
|
|
* child_intpin = intpin on child bus slot (0-3)
|
|
* parent_intpin = intpin on parent bus slot (0-3)
|
|
*
|
|
* parent_intpin = (device + child_intpin) % 4
|
|
*/
|
|
parent_intpin = (pci_get_slot(dev) + (pin - 1)) % 4;
|
|
|
|
/*
|
|
* Our parent is a PCI bus. Its parent must export the pcib interface
|
|
* which includes the ability to route interrupts.
|
|
*/
|
|
bus = device_get_parent(pcib);
|
|
intnum = PCIB_ROUTE_INTERRUPT(device_get_parent(bus), pcib, parent_intpin + 1);
|
|
if (PCI_INTERRUPT_VALID(intnum) && bootverbose) {
|
|
device_printf(pcib, "slot %d INT%c is routed to irq %d\n",
|
|
pci_get_slot(dev), 'A' + pin - 1, intnum);
|
|
}
|
|
return(intnum);
|
|
}
|
|
|
|
/* Pass request to alloc MSI/MSI-X messages up to the parent bridge. */
|
|
int
|
|
pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
|
|
{
|
|
struct pcib_softc *sc = device_get_softc(pcib);
|
|
device_t bus;
|
|
|
|
if (sc->flags & PCIB_DISABLE_MSI)
|
|
return (ENXIO);
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
|
|
irqs));
|
|
}
|
|
|
|
/* Pass request to release MSI/MSI-X messages up to the parent bridge. */
|
|
int
|
|
pcib_release_msi(device_t pcib, device_t dev, int count, int *irqs)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_RELEASE_MSI(device_get_parent(bus), dev, count, irqs));
|
|
}
|
|
|
|
/* Pass request to alloc an MSI-X message up to the parent bridge. */
|
|
int
|
|
pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
|
|
{
|
|
struct pcib_softc *sc = device_get_softc(pcib);
|
|
device_t bus;
|
|
|
|
if (sc->flags & PCIB_DISABLE_MSIX)
|
|
return (ENXIO);
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
|
|
}
|
|
|
|
/* Pass request to release an MSI-X message up to the parent bridge. */
|
|
int
|
|
pcib_release_msix(device_t pcib, device_t dev, int irq)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_RELEASE_MSIX(device_get_parent(bus), dev, irq));
|
|
}
|
|
|
|
/* Pass request to map MSI/MSI-X message up to parent bridge. */
|
|
int
|
|
pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
|
|
uint32_t *data)
|
|
{
|
|
device_t bus;
|
|
int error;
|
|
|
|
bus = device_get_parent(pcib);
|
|
error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
|
|
if (error)
|
|
return (error);
|
|
|
|
pci_ht_map_msi(pcib, *addr);
|
|
return (0);
|
|
}
|
|
|
|
/* Pass request for device power state up to parent bridge. */
|
|
int
|
|
pcib_power_for_sleep(device_t pcib, device_t dev, int *pstate)
|
|
{
|
|
device_t bus;
|
|
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_POWER_FOR_SLEEP(bus, dev, pstate));
|
|
}
|
|
|
|
static int
|
|
pcib_ari_enabled(device_t pcib)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(pcib);
|
|
|
|
return ((sc->flags & PCIB_ENABLE_ARI) != 0);
|
|
}
|
|
|
|
static int
|
|
pcib_ari_get_id(device_t pcib, device_t dev, enum pci_id_type type,
|
|
uintptr_t *id)
|
|
{
|
|
struct pcib_softc *sc;
|
|
device_t bus_dev;
|
|
uint8_t bus, slot, func;
|
|
|
|
if (type != PCI_ID_RID) {
|
|
bus_dev = device_get_parent(pcib);
|
|
return (PCIB_GET_ID(device_get_parent(bus_dev), dev, type, id));
|
|
}
|
|
|
|
sc = device_get_softc(pcib);
|
|
|
|
if (sc->flags & PCIB_ENABLE_ARI) {
|
|
bus = pci_get_bus(dev);
|
|
func = pci_get_function(dev);
|
|
|
|
*id = (PCI_ARI_RID(bus, func));
|
|
} else {
|
|
bus = pci_get_bus(dev);
|
|
slot = pci_get_slot(dev);
|
|
func = pci_get_function(dev);
|
|
|
|
*id = (PCI_RID(bus, slot, func));
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check that the downstream port (pcib) and the endpoint device (dev) both
|
|
* support ARI. If so, enable it and return 0, otherwise return an error.
|
|
*/
|
|
static int
|
|
pcib_try_enable_ari(device_t pcib, device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
int error;
|
|
uint32_t cap2;
|
|
int ari_cap_off;
|
|
uint32_t ari_ver;
|
|
uint32_t pcie_pos;
|
|
|
|
sc = device_get_softc(pcib);
|
|
|
|
/*
|
|
* ARI is controlled in a register in the PCIe capability structure.
|
|
* If the downstream port does not have the PCIe capability structure
|
|
* then it does not support ARI.
|
|
*/
|
|
error = pci_find_cap(pcib, PCIY_EXPRESS, &pcie_pos);
|
|
if (error != 0)
|
|
return (ENODEV);
|
|
|
|
/* Check that the PCIe port advertises ARI support. */
|
|
cap2 = pci_read_config(pcib, pcie_pos + PCIER_DEVICE_CAP2, 4);
|
|
if (!(cap2 & PCIEM_CAP2_ARI))
|
|
return (ENODEV);
|
|
|
|
/*
|
|
* Check that the endpoint device advertises ARI support via the ARI
|
|
* extended capability structure.
|
|
*/
|
|
error = pci_find_extcap(dev, PCIZ_ARI, &ari_cap_off);
|
|
if (error != 0)
|
|
return (ENODEV);
|
|
|
|
/*
|
|
* Finally, check that the endpoint device supports the same version
|
|
* of ARI that we do.
|
|
*/
|
|
ari_ver = pci_read_config(dev, ari_cap_off, 4);
|
|
if (PCI_EXTCAP_VER(ari_ver) != PCIB_SUPPORTED_ARI_VER) {
|
|
if (bootverbose)
|
|
device_printf(pcib,
|
|
"Unsupported version of ARI (%d) detected\n",
|
|
PCI_EXTCAP_VER(ari_ver));
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
pcib_enable_ari(sc, pcie_pos);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pcib_request_feature_allow(device_t pcib, device_t dev,
|
|
enum pci_feature feature)
|
|
{
|
|
/*
|
|
* No host firmware we have to negotiate with, so we allow
|
|
* every valid feature requested.
|
|
*/
|
|
switch (feature) {
|
|
case PCI_FEATURE_AER:
|
|
case PCI_FEATURE_HP:
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pcib_request_feature(device_t dev, enum pci_feature feature)
|
|
{
|
|
|
|
/*
|
|
* Invoke PCIB_REQUEST_FEATURE of this bridge first in case
|
|
* the firmware overrides the method of PCI-PCI bridges.
|
|
*/
|
|
return (PCIB_REQUEST_FEATURE(dev, dev, feature));
|
|
}
|
|
|
|
/*
|
|
* Pass the request to use this PCI feature up the tree. Either there's a
|
|
* firmware like ACPI that's using this feature that will approve (or deny) the
|
|
* request to take it over, or the platform has no such firmware, in which case
|
|
* the request will be approved. If the request is approved, the OS is expected
|
|
* to make use of the feature or render it harmless.
|
|
*/
|
|
static int
|
|
pcib_request_feature_default(device_t pcib, device_t dev,
|
|
enum pci_feature feature)
|
|
{
|
|
device_t bus;
|
|
|
|
/*
|
|
* Our parent is necessarily a pci bus. Its parent will either be
|
|
* another pci bridge (which passes it up) or a host bridge that can
|
|
* approve or reject the request.
|
|
*/
|
|
bus = device_get_parent(pcib);
|
|
return (PCIB_REQUEST_FEATURE(device_get_parent(bus), dev, feature));
|
|
}
|
|
|
|
static int
|
|
pcib_reset_child(device_t dev, device_t child, int flags)
|
|
{
|
|
struct pci_devinfo *pdinfo;
|
|
int error;
|
|
|
|
error = 0;
|
|
if (dev == NULL || device_get_parent(child) != dev)
|
|
goto out;
|
|
error = ENXIO;
|
|
if (device_get_devclass(child) != devclass_find("pci"))
|
|
goto out;
|
|
pdinfo = device_get_ivars(dev);
|
|
if (pdinfo->cfg.pcie.pcie_location != 0 &&
|
|
(pdinfo->cfg.pcie.pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT ||
|
|
pdinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)) {
|
|
error = bus_helper_reset_prepare(child, flags);
|
|
if (error == 0) {
|
|
error = pcie_link_reset(dev,
|
|
pdinfo->cfg.pcie.pcie_location);
|
|
/* XXXKIB call _post even if error != 0 ? */
|
|
bus_helper_reset_post(child, flags);
|
|
}
|
|
}
|
|
out:
|
|
return (error);
|
|
}
|