b75d5a0ef9
resource allocation on x86 platforms: - Add a new helper API that Host-PCI bridge drivers can use to restrict resource allocation requests to a set of address ranges for different resource types. - For the ACPI Host-PCI bridge driver, use Producer address range resources in _CRS to enumerate valid address ranges for a given Host-PCI bridge. This can be disabled by including "hostres" in the debug.acpi.disabled tunable. - For the MPTable Host-PCI bridge driver, use entries in the extended MPTable to determine the valid address ranges for a given Host-PCI bridge. This required adding code to parse extended table entries. Similar to the new PCI-PCI bridge driver, these changes are only enabled if the NEW_PCIB kernel option is enabled (which is enabled by default on amd64 and i386). Approved by: re (kib)
1419 lines
39 KiB
C
1419 lines
39 KiB
C
/*-
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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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__FBSDID("$FreeBSD$");
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/*
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* PCI:PCI bridge support.
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*/
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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/malloc.h>
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#include <sys/module.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 <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 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, bus_generic_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_print_child, bus_generic_print_child),
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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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/* pcib interface */
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DEVMETHOD(pcib_maxslots, pcib_maxslots),
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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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{ 0, 0 }
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};
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static devclass_t pcib_devclass;
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DEFINE_CLASS_0(pcib, pcib_driver, pcib_methods, sizeof(struct pcib_softc));
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DRIVER_MODULE(pcib, pci, pcib_driver, pcib_devclass, 0, 0);
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#ifdef NEW_PCIB
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/*
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* XXX Todo:
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* - properly handle the ISA enable bit. If it is set, we should change
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* the behavior of the I/O window resource and rman to not allocate the
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* blocked ranges (upper 768 bytes of each 1K in the first 64k of the
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* I/O port address space).
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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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switch (type) {
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case SYS_RES_IOPORT:
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return (rman_is_region_manager(r, &sc->io.rman));
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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 (1);
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return (rman_is_region_manager(r, &sc->mem.rman));
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}
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return (0);
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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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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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char buf[64];
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int error, rid;
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if (max_address != (u_long)max_address)
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max_address = ~0ul;
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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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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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rid = w->reg;
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w->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 (w->res == NULL) {
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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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error = rman_manage_region(&w->rman, rman_get_start(w->res),
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rman_get_end(w->res));
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if (error)
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panic("Failed to initialize rman with resource");
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}
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/*
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* Initialize I/O windows.
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*/
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static void
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pcib_probe_windows(struct pcib_softc *sc)
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{
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pci_addr_t max;
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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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/* Determine if the I/O port window is implemented. */
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val = pci_read_config(dev, PCIR_IOBASEL_1, 1);
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if (val == 0) {
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/*
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* If 'val' is zero, then only 16-bits of I/O space
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* are supported.
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*/
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pci_write_config(dev, PCIR_IOBASEL_1, 0xff, 1);
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if (pci_read_config(dev, PCIR_IOBASEL_1, 1) != 0) {
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sc->io.valid = 1;
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pci_write_config(dev, PCIR_IOBASEL_1, 0, 1);
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}
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} else
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sc->io.valid = 1;
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/* Read the existing I/O port window. */
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if (sc->io.valid) {
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sc->io.reg = PCIR_IOBASEL_1;
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sc->io.step = 12;
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sc->io.mask = WIN_IO;
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sc->io.name = "I/O port";
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if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) {
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sc->io.base = PCI_PPBIOBASE(
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pci_read_config(dev, PCIR_IOBASEH_1, 2), val);
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sc->io.limit = PCI_PPBIOLIMIT(
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pci_read_config(dev, PCIR_IOLIMITH_1, 2),
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pci_read_config(dev, PCIR_IOLIMITL_1, 1));
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max = 0xffffffff;
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} else {
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sc->io.base = PCI_PPBIOBASE(0, val);
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sc->io.limit = PCI_PPBIOLIMIT(0,
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pci_read_config(dev, PCIR_IOLIMITL_1, 1));
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max = 0xffff;
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}
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pcib_alloc_window(sc, &sc->io, SYS_RES_IOPORT, 0, max);
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}
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/* Read the existing memory window. */
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sc->mem.valid = 1;
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sc->mem.reg = PCIR_MEMBASE_1;
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sc->mem.step = 20;
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sc->mem.mask = WIN_MEM;
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sc->mem.name = "memory";
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sc->mem.base = PCI_PPBMEMBASE(0,
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pci_read_config(dev, PCIR_MEMBASE_1, 2));
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sc->mem.limit = PCI_PPBMEMLIMIT(0,
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pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
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pcib_alloc_window(sc, &sc->mem, SYS_RES_MEMORY, 0, 0xffffffff);
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/* Determine if the prefetchable memory window is implemented. */
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val = pci_read_config(dev, PCIR_PMBASEL_1, 2);
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if (val == 0) {
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/*
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* If 'val' is zero, then only 32-bits of memory space
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* are supported.
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*/
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pci_write_config(dev, PCIR_PMBASEL_1, 0xffff, 2);
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if (pci_read_config(dev, PCIR_PMBASEL_1, 2) != 0) {
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sc->pmem.valid = 1;
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pci_write_config(dev, PCIR_PMBASEL_1, 0, 2);
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}
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} else
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sc->pmem.valid = 1;
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/* Read the existing prefetchable memory window. */
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if (sc->pmem.valid) {
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sc->pmem.reg = PCIR_PMBASEL_1;
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sc->pmem.step = 20;
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sc->pmem.mask = WIN_PMEM;
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sc->pmem.name = "prefetch";
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if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) {
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sc->pmem.base = PCI_PPBMEMBASE(
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pci_read_config(dev, PCIR_PMBASEH_1, 4), val);
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sc->pmem.limit = PCI_PPBMEMLIMIT(
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pci_read_config(dev, PCIR_PMLIMITH_1, 4),
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pci_read_config(dev, PCIR_PMLIMITL_1, 2));
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max = 0xffffffffffffffff;
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} else {
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sc->pmem.base = PCI_PPBMEMBASE(0, val);
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sc->pmem.limit = PCI_PPBMEMLIMIT(0,
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pci_read_config(dev, PCIR_PMLIMITL_1, 2));
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max = 0xffffffff;
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}
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pcib_alloc_window(sc, &sc->pmem, SYS_RES_MEMORY,
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RF_PREFETCHABLE, max);
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}
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}
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#else
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/*
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* Is the prefetch window open (eg, can we allocate memory in it?)
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*/
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static int
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pcib_is_prefetch_open(struct pcib_softc *sc)
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{
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return (sc->pmembase > 0 && sc->pmembase < sc->pmemlimit);
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}
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/*
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* Is the nonprefetch window open (eg, can we allocate memory in it?)
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*/
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static int
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pcib_is_nonprefetch_open(struct pcib_softc *sc)
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{
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return (sc->membase > 0 && sc->membase < sc->memlimit);
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}
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|
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/*
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* Is the io window open (eg, can we allocate ports in it?)
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*/
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static int
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pcib_is_io_open(struct pcib_softc *sc)
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{
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return (sc->iobase > 0 && sc->iobase < sc->iolimit);
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}
|
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|
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/*
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* Get current I/O decode.
|
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*/
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static void
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pcib_get_io_decode(struct pcib_softc *sc)
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{
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device_t dev;
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uint32_t iolow;
|
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dev = sc->dev;
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iolow = pci_read_config(dev, PCIR_IOBASEL_1, 1);
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if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
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sc->iobase = PCI_PPBIOBASE(
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pci_read_config(dev, PCIR_IOBASEH_1, 2), iolow);
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else
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sc->iobase = PCI_PPBIOBASE(0, iolow);
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iolow = pci_read_config(dev, PCIR_IOLIMITL_1, 1);
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if ((iolow & PCIM_BRIO_MASK) == PCIM_BRIO_32)
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sc->iolimit = PCI_PPBIOLIMIT(
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pci_read_config(dev, PCIR_IOLIMITH_1, 2), iolow);
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else
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sc->iolimit = PCI_PPBIOLIMIT(0, iolow);
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}
|
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|
|
/*
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* Get current memory decode.
|
|
*/
|
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static void
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pcib_get_mem_decode(struct pcib_softc *sc)
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{
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device_t dev;
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pci_addr_t pmemlow;
|
|
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dev = sc->dev;
|
|
|
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sc->membase = PCI_PPBMEMBASE(0,
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pci_read_config(dev, PCIR_MEMBASE_1, 2));
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sc->memlimit = PCI_PPBMEMLIMIT(0,
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pci_read_config(dev, PCIR_MEMLIMIT_1, 2));
|
|
|
|
pmemlow = pci_read_config(dev, PCIR_PMBASEL_1, 2);
|
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if ((pmemlow & PCIM_BRPM_MASK) == PCIM_BRPM_64)
|
|
sc->pmembase = PCI_PPBMEMBASE(
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pci_read_config(dev, PCIR_PMBASEH_1, 4), pmemlow);
|
|
else
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|
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(
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pci_read_config(dev, PCIR_PMLIMITH_1, 4), pmemlow);
|
|
else
|
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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)
|
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pci_write_config(dev, PCIR_IOBASEH_1, iohi, 2);
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|
pci_write_config(dev, PCIR_IOBASEL_1, sc->iobase >> 8, 1);
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|
|
|
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
|
|
|
|
/*
|
|
* Get current bridge configuration.
|
|
*/
|
|
static void
|
|
pcib_cfg_save(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
|
|
dev = sc->dev;
|
|
|
|
sc->command = pci_read_config(dev, PCIR_COMMAND, 2);
|
|
sc->pribus = pci_read_config(dev, PCIR_PRIBUS_1, 1);
|
|
sc->secbus = pci_read_config(dev, PCIR_SECBUS_1, 1);
|
|
sc->subbus = pci_read_config(dev, PCIR_SUBBUS_1, 1);
|
|
sc->bridgectl = pci_read_config(dev, PCIR_BRIDGECTL_1, 2);
|
|
sc->seclat = pci_read_config(dev, PCIR_SECLAT_1, 1);
|
|
#ifndef NEW_PCIB
|
|
if (sc->command & PCIM_CMD_PORTEN)
|
|
pcib_get_io_decode(sc);
|
|
if (sc->command & PCIM_CMD_MEMEN)
|
|
pcib_get_mem_decode(sc);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Restore previous bridge configuration.
|
|
*/
|
|
static void
|
|
pcib_cfg_restore(struct pcib_softc *sc)
|
|
{
|
|
device_t dev;
|
|
|
|
dev = sc->dev;
|
|
|
|
pci_write_config(dev, PCIR_COMMAND, sc->command, 2);
|
|
pci_write_config(dev, PCIR_PRIBUS_1, sc->pribus, 1);
|
|
pci_write_config(dev, PCIR_SECBUS_1, sc->secbus, 1);
|
|
pci_write_config(dev, PCIR_SUBBUS_1, sc->subbus, 1);
|
|
pci_write_config(dev, PCIR_BRIDGECTL_1, sc->bridgectl, 2);
|
|
pci_write_config(dev, PCIR_SECLAT_1, sc->seclat, 1);
|
|
#ifdef NEW_PCIB
|
|
pcib_write_windows(sc, WIN_IO | WIN_MEM | WIN_PMEM);
|
|
#else
|
|
if (sc->command & PCIM_CMD_PORTEN)
|
|
pcib_set_io_decode(sc);
|
|
if (sc->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;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
|
|
/*
|
|
* Get current bridge configuration.
|
|
*/
|
|
sc->domain = pci_get_domain(dev);
|
|
sc->secstat = pci_read_config(dev, PCIR_SECSTAT_1, 2);
|
|
pcib_cfg_save(sc);
|
|
|
|
/*
|
|
* 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->secbus, 0, "Secondary bus number");
|
|
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
|
|
CTLFLAG_RD, &sc->subbus, 0, "Subordinate bus number");
|
|
|
|
/*
|
|
* Quirk handling.
|
|
*/
|
|
switch (pci_get_devid(dev)) {
|
|
case 0x12258086: /* Intel 82454KX/GX (Orion) */
|
|
{
|
|
uint8_t supbus;
|
|
|
|
supbus = pci_read_config(dev, 0x41, 1);
|
|
if (supbus != 0xff) {
|
|
sc->secbus = supbus + 1;
|
|
sc->subbus = supbus + 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* 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's also a Toshiba bridge that behaves this
|
|
* way.
|
|
*/
|
|
case 0x124b8086: /* Intel 82380FB Mobile */
|
|
case 0x060513d7: /* Toshiba ???? */
|
|
sc->flags |= PCIB_SUBTRACTIVE;
|
|
break;
|
|
|
|
/* Compaq R3000 BIOS sets wrong subordinate bus number. */
|
|
case 0x00dd10de:
|
|
{
|
|
char *cp;
|
|
|
|
if ((cp = getenv("smbios.planar.maker")) == NULL)
|
|
break;
|
|
if (strncmp(cp, "Compal", 6) != 0) {
|
|
freeenv(cp);
|
|
break;
|
|
}
|
|
freeenv(cp);
|
|
if ((cp = getenv("smbios.planar.product")) == NULL)
|
|
break;
|
|
if (strncmp(cp, "08A0", 4) != 0) {
|
|
freeenv(cp);
|
|
break;
|
|
}
|
|
freeenv(cp);
|
|
if (sc->subbus < 0xa) {
|
|
pci_write_config(dev, PCIR_SUBBUS_1, 0xa, 1);
|
|
sc->subbus = pci_read_config(dev, PCIR_SUBBUS_1, 1);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pci_msi_device_blacklisted(dev))
|
|
sc->flags |= PCIB_DISABLE_MSI;
|
|
|
|
/*
|
|
* 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 NEW_PCIB
|
|
pcib_probe_windows(sc);
|
|
#endif
|
|
if (bootverbose) {
|
|
device_printf(dev, " domain %d\n", sc->domain);
|
|
device_printf(dev, " secondary bus %d\n", sc->secbus);
|
|
device_printf(dev, " subordinate bus %d\n", sc->subbus);
|
|
#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
|
|
else
|
|
device_printf(dev, " no prefetched decode\n");
|
|
if (sc->flags & PCIB_SUBTRACTIVE)
|
|
device_printf(dev, " Subtractively decoded bridge.\n");
|
|
}
|
|
|
|
/*
|
|
* XXX If the secondary bus number is zero, we should assign a bus number
|
|
* since the BIOS hasn't, then initialise the bridge. A simple
|
|
* bus_alloc_resource with the a couple of busses seems like the right
|
|
* approach, but we don't know what busses the BIOS might have already
|
|
* assigned to other bridges on this bus that probe later than we do.
|
|
*
|
|
* If the subordinate bus number is less than the secondary bus number,
|
|
* we should pick a better value. One sensible alternative would be to
|
|
* pick 255; the only tradeoff here is that configuration transactions
|
|
* would be more widely routed than absolutely necessary. We could
|
|
* then do a walk of the tree later and fix it.
|
|
*/
|
|
}
|
|
|
|
int
|
|
pcib_attach(device_t dev)
|
|
{
|
|
struct pcib_softc *sc;
|
|
device_t child;
|
|
|
|
pcib_attach_common(dev);
|
|
sc = device_get_softc(dev);
|
|
if (sc->secbus != 0) {
|
|
child = device_add_child(dev, "pci", sc->secbus);
|
|
if (child != NULL)
|
|
return(bus_generic_attach(dev));
|
|
}
|
|
|
|
/* no secondary bus; we should have fixed this */
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
pcib_suspend(device_t dev)
|
|
{
|
|
device_t pcib;
|
|
int dstate, error;
|
|
|
|
pcib_cfg_save(device_get_softc(dev));
|
|
error = bus_generic_suspend(dev);
|
|
if (error == 0 && pci_do_power_suspend) {
|
|
dstate = PCI_POWERSTATE_D3;
|
|
pcib = device_get_parent(device_get_parent(dev));
|
|
if (PCIB_POWER_FOR_SLEEP(pcib, dev, &dstate) == 0)
|
|
pci_set_powerstate(dev, dstate);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
pcib_resume(device_t dev)
|
|
{
|
|
device_t pcib;
|
|
|
|
if (pci_do_power_resume) {
|
|
pcib = device_get_parent(device_get_parent(dev));
|
|
if (PCIB_POWER_FOR_SLEEP(pcib, dev, NULL) == 0)
|
|
pci_set_powerstate(dev, PCI_POWERSTATE_D0);
|
|
}
|
|
pcib_cfg_restore(device_get_softc(dev));
|
|
return (bus_generic_resume(dev));
|
|
}
|
|
|
|
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->secbus;
|
|
return(0);
|
|
}
|
|
return(ENOENT);
|
|
}
|
|
|
|
int
|
|
pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
|
|
{
|
|
struct pcib_softc *sc = device_get_softc(dev);
|
|
|
|
switch (which) {
|
|
case PCIB_IVAR_DOMAIN:
|
|
return(EINVAL);
|
|
case PCIB_IVAR_BUS:
|
|
sc->secbus = value;
|
|
return(0);
|
|
}
|
|
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, u_long start, u_long end, u_long 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 (%#lx-%#lx) 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);
|
|
}
|
|
|
|
/*
|
|
* Attempt to grow a window to make room for a given resource request.
|
|
* The 'step' parameter is log_2 of the desired I/O window's alignment.
|
|
*/
|
|
static int
|
|
pcib_grow_window(struct pcib_softc *sc, struct pcib_window *w, int type,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
u_long align, start_free, end_free, front, back;
|
|
int error, rid;
|
|
|
|
/*
|
|
* Clamp the desired resource range to the maximum address
|
|
* this window supports. Reject impossible requests.
|
|
*/
|
|
if (!w->valid)
|
|
return (EINVAL);
|
|
if (end > w->rman.rm_end)
|
|
end = w->rman.rm_end;
|
|
if (start + count - 1 > end || start + count < start)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* If there is no resource at all, just try to allocate enough
|
|
* aligned space for this resource.
|
|
*/
|
|
if (w->res == NULL) {
|
|
if (RF_ALIGNMENT(flags) < w->step) {
|
|
flags &= ~RF_ALIGNMENT_MASK;
|
|
flags |= RF_ALIGNMENT_LOG2(w->step);
|
|
}
|
|
start &= ~((1ul << w->step) - 1);
|
|
end |= ((1ul << w->step) - 1);
|
|
count = roundup2(count, 1ul << w->step);
|
|
rid = w->reg;
|
|
w->res = bus_alloc_resource(sc->dev, type, &rid, start, end,
|
|
count, flags & ~RF_ACTIVE);
|
|
if (w->res == NULL) {
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"failed to allocate initial %s window (%#lx-%#lx,%#lx)\n",
|
|
w->name, start, end, count);
|
|
return (ENXIO);
|
|
}
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"allocated initial %s window of %#lx-%#lx\n",
|
|
w->name, rman_get_start(w->res),
|
|
rman_get_end(w->res));
|
|
error = rman_manage_region(&w->rman, rman_get_start(w->res),
|
|
rman_get_end(w->res));
|
|
if (error) {
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"failed to add initial %s window to rman\n",
|
|
w->name);
|
|
bus_release_resource(sc->dev, type, w->reg, w->res);
|
|
w->res = NULL;
|
|
return (error);
|
|
}
|
|
pcib_activate_window(sc, type);
|
|
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.
|
|
*
|
|
* 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 (%#lx-%#lx,%#lx)\n",
|
|
w->name, start, end, count);
|
|
align = 1ul << RF_ALIGNMENT(flags);
|
|
if (start < rman_get_start(w->res)) {
|
|
if (rman_first_free_region(&w->rman, &start_free, &end_free) !=
|
|
0 || start_free != rman_get_start(w->res))
|
|
end_free = rman_get_start(w->res) - 1;
|
|
if (end_free > end)
|
|
end_free = end;
|
|
|
|
/* 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: %#lx-%#lx\n",
|
|
front, end_free);
|
|
front &= (1ul << w->step) - 1;
|
|
front = rman_get_start(w->res) - front;
|
|
} else
|
|
front = 0;
|
|
} else
|
|
front = 0;
|
|
if (end > rman_get_end(w->res)) {
|
|
if (rman_last_free_region(&w->rman, &start_free, &end_free) !=
|
|
0 || end_free != rman_get_end(w->res))
|
|
start_free = rman_get_end(w->res) + 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: %#lx-%#lx\n",
|
|
start_free, back);
|
|
back = roundup2(back + 1, 1ul << w->step) - 1;
|
|
back -= rman_get_end(w->res);
|
|
} 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 = bus_adjust_resource(sc->dev, type, w->res,
|
|
rman_get_start(w->res) - front,
|
|
rman_get_end(w->res));
|
|
if (error == 0)
|
|
break;
|
|
front = 0;
|
|
} else {
|
|
error = bus_adjust_resource(sc->dev, type, w->res,
|
|
rman_get_start(w->res),
|
|
rman_get_end(w->res) + back);
|
|
if (error == 0)
|
|
break;
|
|
back = 0;
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
return (error);
|
|
if (bootverbose)
|
|
device_printf(sc->dev, "grew %s window to %#lx-%#lx\n",
|
|
w->name, rman_get_start(w->res), rman_get_end(w->res));
|
|
|
|
/* Add the newly allocated region to the resource manager. */
|
|
if (w->base != rman_get_start(w->res)) {
|
|
KASSERT(w->limit == rman_get_end(w->res), ("both ends moved"));
|
|
error = rman_manage_region(&w->rman, rman_get_start(w->res),
|
|
w->base - 1);
|
|
} else {
|
|
KASSERT(w->limit != rman_get_end(w->res),
|
|
("neither end moved"));
|
|
error = rman_manage_region(&w->rman, w->limit + 1,
|
|
rman_get_end(w->res));
|
|
}
|
|
if (error) {
|
|
if (bootverbose)
|
|
device_printf(sc->dev,
|
|
"failed to expand %s resource manager\n", w->name);
|
|
bus_adjust_resource(sc->dev, type, w->res, w->base, w->limit);
|
|
return (error);
|
|
}
|
|
|
|
updatewin:
|
|
/* Save the new window. */
|
|
w->base = rman_get_start(w->res);
|
|
w->limit = rman_get_end(w->res);
|
|
KASSERT((w->base & ((1ul << w->step) - 1)) == 0,
|
|
("start address is not aligned"));
|
|
KASSERT((w->limit & ((1ul << w->step) - 1)) == (1ul << w->step) - 1,
|
|
("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,
|
|
u_long start, u_long end, u_long 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) {
|
|
case SYS_RES_IOPORT:
|
|
r = pcib_suballoc_resource(sc, &sc->io, child, type, rid, start,
|
|
end, count, flags);
|
|
if (r != NULL)
|
|
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)
|
|
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,
|
|
u_long start, u_long end)
|
|
{
|
|
struct pcib_softc *sc;
|
|
|
|
sc = device_get_softc(bus);
|
|
if (pcib_is_resource_managed(sc, type, r))
|
|
return (rman_adjust_resource(r, start, end));
|
|
return (bus_generic_adjust_resource(bus, child, type, 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,
|
|
u_long start, u_long end, u_long 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 (%lx) < start (%lx)\n",
|
|
end, start);
|
|
start = 0;
|
|
end = 0;
|
|
ok = 0;
|
|
}
|
|
if (!ok) {
|
|
device_printf(dev, "%s%srequested unsupported I/O "
|
|
"range 0x%lx-0x%lx (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%lx-0x%lx: 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 (%lx) < start (%lx)\n",
|
|
end, start);
|
|
start = 0;
|
|
end = 0;
|
|
ok = 0;
|
|
}
|
|
if (!ok && bootverbose)
|
|
device_printf(dev,
|
|
"%s%srequested unsupported memory range %#lx-%#lx "
|
|
"(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%lx-0x%lx: 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
|
|
|
|
/*
|
|
* PCIB interface.
|
|
*/
|
|
int
|
|
pcib_maxslots(device_t dev)
|
|
{
|
|
return(PCI_SLOTMAX);
|
|
}
|
|
|
|
/*
|
|
* Since we are a child of a PCI bus, its parent must support the pcib interface.
|
|
*/
|
|
uint32_t
|
|
pcib_read_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, int width)
|
|
{
|
|
return(PCIB_READ_CONFIG(device_get_parent(device_get_parent(dev)), b, s, f, reg, width));
|
|
}
|
|
|
|
void
|
|
pcib_write_config(device_t dev, u_int b, u_int s, u_int f, u_int reg, uint32_t val, int width)
|
|
{
|
|
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_MSI)
|
|
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));
|
|
}
|