748 lines
20 KiB
C
748 lines
20 KiB
C
/*-
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2000, BSDi
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* Copyright (c) 2004, John Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.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/sysctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_param.h>
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#include <machine/md_var.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <machine/pci_cfgreg.h>
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#include <machine/segments.h>
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#include <machine/pc/bios.h>
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#define NUM_ISA_INTERRUPTS 16
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/*
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* A link device. Loosely based on the ACPI PCI link device. This doesn't
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* try to support priorities for different ISA interrupts.
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*/
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struct pci_link {
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TAILQ_ENTRY(pci_link) pl_links;
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uint8_t pl_id;
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uint8_t pl_irq;
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uint16_t pl_irqmask;
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int pl_references;
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int pl_routed;
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};
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struct pci_link_lookup {
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struct pci_link **pci_link_ptr;
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int bus;
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int device;
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int pin;
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};
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struct pci_dev_lookup {
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uint8_t link;
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int bus;
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int device;
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int pin;
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};
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typedef void pir_entry_handler(struct PIR_entry *entry,
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struct PIR_intpin* intpin, void *arg);
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static void pci_print_irqmask(u_int16_t irqs);
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static int pci_pir_biosroute(int bus, int device, int func, int pin,
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int irq);
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static int pci_pir_choose_irq(struct pci_link *pci_link, int irqmask);
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static void pci_pir_create_links(struct PIR_entry *entry,
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struct PIR_intpin *intpin, void *arg);
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static void pci_pir_dump_links(void);
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static struct pci_link *pci_pir_find_link(uint8_t link_id);
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static void pci_pir_find_link_handler(struct PIR_entry *entry,
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struct PIR_intpin *intpin, void *arg);
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static void pci_pir_initial_irqs(struct PIR_entry *entry,
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struct PIR_intpin *intpin, void *arg);
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static void pci_pir_parse(void);
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static uint8_t pci_pir_search_irq(int bus, int device, int pin);
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static int pci_pir_valid_irq(struct pci_link *pci_link, int irq);
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static void pci_pir_walk_table(pir_entry_handler *handler, void *arg);
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static MALLOC_DEFINE(M_PIR, "$PIR", "$PIR structures");
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static struct PIR_table *pci_route_table;
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static device_t pir_device;
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static int pci_route_count, pir_bios_irqs, pir_parsed;
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static TAILQ_HEAD(, pci_link) pci_links;
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static int pir_interrupt_weight[NUM_ISA_INTERRUPTS];
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/* sysctl vars */
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SYSCTL_DECL(_hw_pci);
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/* XXX this likely should live in a header file */
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#ifdef PC98
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/* IRQs 3, 5, 7, 9, 10, 11, 12, 13 */
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#define PCI_IRQ_OVERRIDE_MASK 0x3e68
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#else
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/* IRQs 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15 */
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#define PCI_IRQ_OVERRIDE_MASK 0xdef8
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#endif
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static uint32_t pci_irq_override_mask = PCI_IRQ_OVERRIDE_MASK;
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SYSCTL_INT(_hw_pci, OID_AUTO, irq_override_mask, CTLFLAG_RDTUN,
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&pci_irq_override_mask, PCI_IRQ_OVERRIDE_MASK,
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"Mask of allowed irqs to try to route when it has no good clue about\n"
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"which irqs it should use.");
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/*
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* Look for the interrupt routing table.
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*
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* We use PCI BIOS's PIR table if it's available. $PIR is the standard way
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* to do this. Sadly, some machines are not standards conforming and have
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* _PIR instead. We shrug and cope by looking for both.
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*/
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void
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pci_pir_open(void)
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{
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struct PIR_table *pt;
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uint32_t sigaddr;
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int i;
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uint8_t ck, *cv;
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/* Don't try if we've already found a table. */
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if (pci_route_table != NULL)
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return;
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/* Look for $PIR and then _PIR. */
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sigaddr = bios_sigsearch(0, "$PIR", 4, 16, 0);
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if (sigaddr == 0)
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sigaddr = bios_sigsearch(0, "_PIR", 4, 16, 0);
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if (sigaddr == 0)
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return;
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/* If we found something, check the checksum and length. */
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/* XXX - Use pmap_mapdev()? */
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pt = (struct PIR_table *)(uintptr_t)BIOS_PADDRTOVADDR(sigaddr);
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if (pt->pt_header.ph_length <= sizeof(struct PIR_header))
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return;
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for (cv = (u_int8_t *)pt, ck = 0, i = 0;
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i < (pt->pt_header.ph_length); i++)
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ck += cv[i];
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if (ck != 0)
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return;
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/* Ok, we've got a valid table. */
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pci_route_table = pt;
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pci_route_count = (pt->pt_header.ph_length -
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sizeof(struct PIR_header)) /
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sizeof(struct PIR_entry);
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}
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/*
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* Find the pci_link structure for a given link ID.
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*/
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static struct pci_link *
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pci_pir_find_link(uint8_t link_id)
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{
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struct pci_link *pci_link;
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TAILQ_FOREACH(pci_link, &pci_links, pl_links) {
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if (pci_link->pl_id == link_id)
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return (pci_link);
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}
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return (NULL);
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}
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/*
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* Find the link device associated with a PCI device in the table.
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*/
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static void
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pci_pir_find_link_handler(struct PIR_entry *entry, struct PIR_intpin *intpin,
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void *arg)
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{
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struct pci_link_lookup *lookup;
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lookup = (struct pci_link_lookup *)arg;
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if (entry->pe_bus == lookup->bus &&
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entry->pe_device == lookup->device &&
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intpin - entry->pe_intpin == lookup->pin)
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*lookup->pci_link_ptr = pci_pir_find_link(intpin->link);
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}
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/*
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* Check to see if a possible IRQ setting is valid.
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*/
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static int
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pci_pir_valid_irq(struct pci_link *pci_link, int irq)
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{
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if (!PCI_INTERRUPT_VALID(irq))
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return (0);
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return (pci_link->pl_irqmask & (1 << irq));
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}
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/*
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* Walk the $PIR executing the worker function for each valid intpin entry
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* in the table. The handler is passed a pointer to both the entry and
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* the intpin in the entry.
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*/
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static void
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pci_pir_walk_table(pir_entry_handler *handler, void *arg)
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{
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struct PIR_entry *entry;
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struct PIR_intpin *intpin;
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int i, pin;
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entry = &pci_route_table->pt_entry[0];
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for (i = 0; i < pci_route_count; i++, entry++) {
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intpin = &entry->pe_intpin[0];
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for (pin = 0; pin < 4; pin++, intpin++)
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if (intpin->link != 0)
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handler(entry, intpin, arg);
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}
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}
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static void
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pci_pir_create_links(struct PIR_entry *entry, struct PIR_intpin *intpin,
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void *arg)
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{
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struct pci_link *pci_link;
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pci_link = pci_pir_find_link(intpin->link);
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if (pci_link != NULL) {
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pci_link->pl_references++;
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if (intpin->irqs != pci_link->pl_irqmask) {
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if (bootverbose)
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printf(
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"$PIR: Entry %d.%d.INT%c has different mask for link %#x, merging\n",
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entry->pe_bus, entry->pe_device,
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(intpin - entry->pe_intpin) + 'A',
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pci_link->pl_id);
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pci_link->pl_irqmask &= intpin->irqs;
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}
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} else {
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pci_link = malloc(sizeof(struct pci_link), M_PIR, M_WAITOK);
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pci_link->pl_id = intpin->link;
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pci_link->pl_irqmask = intpin->irqs;
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pci_link->pl_irq = PCI_INVALID_IRQ;
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pci_link->pl_references = 1;
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pci_link->pl_routed = 0;
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TAILQ_INSERT_TAIL(&pci_links, pci_link, pl_links);
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}
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}
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/*
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* Look to see if any of the function on the PCI device at bus/device have
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* an interrupt routed to intpin 'pin' by the BIOS.
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*/
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static uint8_t
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pci_pir_search_irq(int bus, int device, int pin)
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{
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uint32_t value;
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uint8_t func, maxfunc;
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/* See if we have a valid device at function 0. */
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value = pci_cfgregread(bus, device, 0, PCIR_HDRTYPE, 1);
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if ((value & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
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return (PCI_INVALID_IRQ);
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if (value & PCIM_MFDEV)
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maxfunc = PCI_FUNCMAX;
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else
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maxfunc = 0;
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/* Scan all possible functions at this device. */
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for (func = 0; func <= maxfunc; func++) {
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value = pci_cfgregread(bus, device, func, PCIR_DEVVENDOR, 4);
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if (value == 0xffffffff)
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continue;
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value = pci_cfgregread(bus, device, func, PCIR_INTPIN, 1);
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/*
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* See if it uses the pin in question. Note that the passed
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* in pin uses 0 for A, .. 3 for D whereas the intpin
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* register uses 0 for no interrupt, 1 for A, .. 4 for D.
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*/
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if (value != pin + 1)
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continue;
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value = pci_cfgregread(bus, device, func, PCIR_INTLINE, 1);
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if (bootverbose)
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printf(
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"$PIR: Found matching pin for %d.%d.INT%c at func %d: %d\n",
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bus, device, pin + 'A', func, value);
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if (value != PCI_INVALID_IRQ)
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return (value);
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}
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return (PCI_INVALID_IRQ);
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}
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/*
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* Try to initialize IRQ based on this device's IRQ.
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*/
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static void
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pci_pir_initial_irqs(struct PIR_entry *entry, struct PIR_intpin *intpin,
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void *arg)
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{
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struct pci_link *pci_link;
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uint8_t irq, pin;
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pin = intpin - entry->pe_intpin;
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pci_link = pci_pir_find_link(intpin->link);
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irq = pci_pir_search_irq(entry->pe_bus, entry->pe_device, pin);
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if (irq == PCI_INVALID_IRQ || irq == pci_link->pl_irq)
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return;
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/* Don't trust any BIOS IRQs greater than 15. */
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if (irq >= NUM_ISA_INTERRUPTS) {
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printf(
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"$PIR: Ignoring invalid BIOS IRQ %d from %d.%d.INT%c for link %#x\n",
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irq, entry->pe_bus, entry->pe_device, pin + 'A',
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pci_link->pl_id);
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return;
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}
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/*
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* If we don't have an IRQ for this link yet, then we trust the
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* BIOS, even if it seems invalid from the $PIR entries.
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*/
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if (pci_link->pl_irq == PCI_INVALID_IRQ) {
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if (!pci_pir_valid_irq(pci_link, irq))
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printf(
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"$PIR: Using invalid BIOS IRQ %d from %d.%d.INT%c for link %#x\n",
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irq, entry->pe_bus, entry->pe_device, pin + 'A',
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pci_link->pl_id);
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pci_link->pl_irq = irq;
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pci_link->pl_routed = 1;
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return;
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}
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/*
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* We have an IRQ and it doesn't match the current IRQ for this
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* link. If the new IRQ is invalid, then warn about it and ignore
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* it. If the old IRQ is invalid and the new IRQ is valid, then
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* prefer the new IRQ instead. If both IRQs are valid, then just
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* use the first one. Note that if we ever get into this situation
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* we are having to guess which setting the BIOS actually routed.
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* Perhaps we should just give up instead.
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*/
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if (!pci_pir_valid_irq(pci_link, irq)) {
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printf(
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"$PIR: BIOS IRQ %d for %d.%d.INT%c is not valid for link %#x\n",
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irq, entry->pe_bus, entry->pe_device, pin + 'A',
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pci_link->pl_id);
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} else if (!pci_pir_valid_irq(pci_link, pci_link->pl_irq)) {
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printf(
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"$PIR: Preferring valid BIOS IRQ %d from %d.%d.INT%c for link %#x to IRQ %d\n",
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irq, entry->pe_bus, entry->pe_device, pin + 'A',
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pci_link->pl_id, pci_link->pl_irq);
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pci_link->pl_irq = irq;
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pci_link->pl_routed = 1;
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} else
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printf(
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"$PIR: BIOS IRQ %d for %d.%d.INT%c does not match link %#x irq %d\n",
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irq, entry->pe_bus, entry->pe_device, pin + 'A',
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pci_link->pl_id, pci_link->pl_irq);
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}
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/*
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* Parse $PIR to enumerate link devices and attempt to determine their
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* initial state. This could perhaps be cleaner if we had drivers for the
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* various interrupt routers as they could read the initial IRQ for each
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* link.
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*/
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static void
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pci_pir_parse(void)
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{
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char tunable_buffer[64];
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struct pci_link *pci_link;
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int i, irq;
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/* Only parse once. */
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if (pir_parsed)
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return;
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pir_parsed = 1;
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/* Enumerate link devices. */
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TAILQ_INIT(&pci_links);
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pci_pir_walk_table(pci_pir_create_links, NULL);
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if (bootverbose) {
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printf("$PIR: Links after initial probe:\n");
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pci_pir_dump_links();
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}
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/*
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* Check to see if the BIOS has already routed any of the links by
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* checking each device connected to each link to see if it has a
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* valid IRQ.
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*/
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pci_pir_walk_table(pci_pir_initial_irqs, NULL);
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if (bootverbose) {
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printf("$PIR: Links after initial IRQ discovery:\n");
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pci_pir_dump_links();
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}
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/*
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* Allow the user to override the IRQ for a given link device. We
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* allow invalid IRQs to be specified but warn about them. An IRQ
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* of 255 or 0 clears any preset IRQ.
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*/
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i = 0;
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TAILQ_FOREACH(pci_link, &pci_links, pl_links) {
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snprintf(tunable_buffer, sizeof(tunable_buffer),
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"hw.pci.link.%#x.irq", pci_link->pl_id);
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if (getenv_int(tunable_buffer, &irq) == 0)
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continue;
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if (irq == 0)
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irq = PCI_INVALID_IRQ;
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if (irq != PCI_INVALID_IRQ &&
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!pci_pir_valid_irq(pci_link, irq) && bootverbose)
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printf(
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"$PIR: Warning, IRQ %d for link %#x is not listed as valid\n",
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irq, pci_link->pl_id);
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pci_link->pl_routed = 0;
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pci_link->pl_irq = irq;
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i = 1;
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}
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if (bootverbose && i) {
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printf("$PIR: Links after tunable overrides:\n");
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pci_pir_dump_links();
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}
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/*
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* Build initial interrupt weights as well as bitmap of "known-good"
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* IRQs that the BIOS has already used for PCI link devices.
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*/
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TAILQ_FOREACH(pci_link, &pci_links, pl_links) {
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if (!PCI_INTERRUPT_VALID(pci_link->pl_irq))
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continue;
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pir_bios_irqs |= 1 << pci_link->pl_irq;
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pir_interrupt_weight[pci_link->pl_irq] +=
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pci_link->pl_references;
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}
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if (bootverbose) {
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printf("$PIR: IRQs used by BIOS: ");
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pci_print_irqmask(pir_bios_irqs);
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printf("\n");
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printf("$PIR: Interrupt Weights:\n[ ");
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for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
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printf(" %3d", i);
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printf(" ]\n[ ");
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for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
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printf(" %3d", pir_interrupt_weight[i]);
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printf(" ]\n");
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}
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}
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|
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/*
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* Use the PCI BIOS to route an interrupt for a given device.
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*
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* Input:
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* AX = PCIBIOS_ROUTE_INTERRUPT
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* BH = bus
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* BL = device [7:3] / function [2:0]
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* CH = IRQ
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* CL = Interrupt Pin (0x0A = A, ... 0x0D = D)
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*/
|
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static int
|
|
pci_pir_biosroute(int bus, int device, int func, int pin, int irq)
|
|
{
|
|
struct bios_regs args;
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|
|
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args.eax = PCIBIOS_ROUTE_INTERRUPT;
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args.ebx = (bus << 8) | (device << 3) | func;
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args.ecx = (irq << 8) | (0xa + pin);
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return (bios32(&args, PCIbios.ventry, GSEL(GCODE_SEL, SEL_KPL)));
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}
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|
|
|
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/*
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* Route a PCI interrupt using a link device from the $PIR.
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|
*/
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int
|
|
pci_pir_route_interrupt(int bus, int device, int func, int pin)
|
|
{
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struct pci_link_lookup lookup;
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struct pci_link *pci_link;
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int error, irq;
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|
|
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if (pci_route_table == NULL)
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return (PCI_INVALID_IRQ);
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|
|
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/* Lookup link device for this PCI device/pin. */
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pci_link = NULL;
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lookup.bus = bus;
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lookup.device = device;
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lookup.pin = pin - 1;
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lookup.pci_link_ptr = &pci_link;
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pci_pir_walk_table(pci_pir_find_link_handler, &lookup);
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if (pci_link == NULL) {
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printf("$PIR: No matching entry for %d.%d.INT%c\n", bus,
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device, pin - 1 + 'A');
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return (PCI_INVALID_IRQ);
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}
|
|
|
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/*
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* Pick a new interrupt if we don't have one already. We look
|
|
* for an interrupt from several different sets. First, if
|
|
* this link only has one valid IRQ, use that. Second, we
|
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* check the set of PCI only interrupts from the $PIR. Third,
|
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* we check the set of known-good interrupts that the BIOS has
|
|
* already used. Lastly, we check the "all possible valid
|
|
* IRQs" set.
|
|
*/
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if (!PCI_INTERRUPT_VALID(pci_link->pl_irq)) {
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if (pci_link->pl_irqmask != 0 && powerof2(pci_link->pl_irqmask))
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irq = ffs(pci_link->pl_irqmask) - 1;
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else
|
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irq = pci_pir_choose_irq(pci_link,
|
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pci_route_table->pt_header.ph_pci_irqs);
|
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if (!PCI_INTERRUPT_VALID(irq))
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irq = pci_pir_choose_irq(pci_link, pir_bios_irqs);
|
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if (!PCI_INTERRUPT_VALID(irq))
|
|
irq = pci_pir_choose_irq(pci_link,
|
|
pci_irq_override_mask);
|
|
if (!PCI_INTERRUPT_VALID(irq)) {
|
|
if (bootverbose)
|
|
printf(
|
|
"$PIR: Failed to route interrupt for %d:%d INT%c\n",
|
|
bus, device, pin - 1 + 'A');
|
|
return (PCI_INVALID_IRQ);
|
|
}
|
|
pci_link->pl_irq = irq;
|
|
}
|
|
|
|
/* Ask the BIOS to route this IRQ if we haven't done so already. */
|
|
if (!pci_link->pl_routed) {
|
|
error = pci_pir_biosroute(bus, device, func, pin - 1,
|
|
pci_link->pl_irq);
|
|
|
|
/* Ignore errors when routing a unique interrupt. */
|
|
if (error && !powerof2(pci_link->pl_irqmask)) {
|
|
printf("$PIR: ROUTE_INTERRUPT failed.\n");
|
|
return (PCI_INVALID_IRQ);
|
|
}
|
|
pci_link->pl_routed = 1;
|
|
|
|
/* Ensure the interrupt is set to level/low trigger. */
|
|
KASSERT(pir_device != NULL, ("missing pir device"));
|
|
BUS_CONFIG_INTR(pir_device, pci_link->pl_irq,
|
|
INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
|
|
}
|
|
if (bootverbose)
|
|
printf("$PIR: %d:%d INT%c routed to irq %d\n", bus, device,
|
|
pin - 1 + 'A', pci_link->pl_irq);
|
|
return (pci_link->pl_irq);
|
|
}
|
|
|
|
/*
|
|
* Try to pick an interrupt for the specified link from the interrupts
|
|
* set in the mask.
|
|
*/
|
|
static int
|
|
pci_pir_choose_irq(struct pci_link *pci_link, int irqmask)
|
|
{
|
|
int i, irq, realmask;
|
|
|
|
/* XXX: Need to have a #define of known bad IRQs to also mask out? */
|
|
realmask = pci_link->pl_irqmask & irqmask;
|
|
if (realmask == 0)
|
|
return (PCI_INVALID_IRQ);
|
|
|
|
/* Find IRQ with lowest weight. */
|
|
irq = PCI_INVALID_IRQ;
|
|
for (i = 0; i < NUM_ISA_INTERRUPTS; i++) {
|
|
if (!(realmask & 1 << i))
|
|
continue;
|
|
if (irq == PCI_INVALID_IRQ ||
|
|
pir_interrupt_weight[i] < pir_interrupt_weight[irq])
|
|
irq = i;
|
|
}
|
|
if (bootverbose && PCI_INTERRUPT_VALID(irq)) {
|
|
printf("$PIR: Found IRQ %d for link %#x from ", irq,
|
|
pci_link->pl_id);
|
|
pci_print_irqmask(realmask);
|
|
printf("\n");
|
|
}
|
|
return (irq);
|
|
}
|
|
|
|
static void
|
|
pci_print_irqmask(u_int16_t irqs)
|
|
{
|
|
int i, first;
|
|
|
|
if (irqs == 0) {
|
|
printf("none");
|
|
return;
|
|
}
|
|
first = 1;
|
|
for (i = 0; i < 16; i++, irqs >>= 1)
|
|
if (irqs & 1) {
|
|
if (!first)
|
|
printf(" ");
|
|
else
|
|
first = 0;
|
|
printf("%d", i);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Display link devices.
|
|
*/
|
|
static void
|
|
pci_pir_dump_links(void)
|
|
{
|
|
struct pci_link *pci_link;
|
|
|
|
printf("Link IRQ Rtd Ref IRQs\n");
|
|
TAILQ_FOREACH(pci_link, &pci_links, pl_links) {
|
|
printf("%#4x %3d %c %3d ", pci_link->pl_id,
|
|
pci_link->pl_irq, pci_link->pl_routed ? 'Y' : 'N',
|
|
pci_link->pl_references);
|
|
pci_print_irqmask(pci_link->pl_irqmask);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* See if any interrupts for a given PCI bus are routed in the PIR. Don't
|
|
* even bother looking if the BIOS doesn't support routing anyways. If we
|
|
* are probing a PCI-PCI bridge, then require_parse will be true and we should
|
|
* only succeed if a host-PCI bridge has already attached and parsed the PIR.
|
|
*/
|
|
int
|
|
pci_pir_probe(int bus, int require_parse)
|
|
{
|
|
int i;
|
|
|
|
if (pci_route_table == NULL || (require_parse && !pir_parsed))
|
|
return (0);
|
|
for (i = 0; i < pci_route_count; i++)
|
|
if (pci_route_table->pt_entry[i].pe_bus == bus)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The driver for the new-bus psuedo device pir0 for the $PIR table.
|
|
*/
|
|
|
|
static int
|
|
pir_probe(device_t dev)
|
|
{
|
|
char buf[64];
|
|
|
|
snprintf(buf, sizeof(buf), "PCI Interrupt Routing Table: %d Entries",
|
|
pci_route_count);
|
|
device_set_desc_copy(dev, buf);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pir_attach(device_t dev)
|
|
{
|
|
|
|
pci_pir_parse();
|
|
KASSERT(pir_device == NULL, ("Multiple pir devices"));
|
|
pir_device = dev;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
pir_resume_find_device(struct PIR_entry *entry, struct PIR_intpin *intpin,
|
|
void *arg)
|
|
{
|
|
struct pci_dev_lookup *pd;
|
|
|
|
pd = (struct pci_dev_lookup *)arg;
|
|
if (intpin->link != pd->link || pd->bus != -1)
|
|
return;
|
|
pd->bus = entry->pe_bus;
|
|
pd->device = entry->pe_device;
|
|
pd->pin = intpin - entry->pe_intpin;
|
|
}
|
|
|
|
static int
|
|
pir_resume(device_t dev)
|
|
{
|
|
struct pci_dev_lookup pd;
|
|
struct pci_link *pci_link;
|
|
int error;
|
|
|
|
/* Ask the BIOS to re-route each link that was already routed. */
|
|
TAILQ_FOREACH(pci_link, &pci_links, pl_links) {
|
|
if (!PCI_INTERRUPT_VALID(pci_link->pl_irq)) {
|
|
KASSERT(!pci_link->pl_routed,
|
|
("link %#x is routed but has invalid PCI IRQ",
|
|
pci_link->pl_id));
|
|
continue;
|
|
}
|
|
if (pci_link->pl_routed) {
|
|
pd.bus = -1;
|
|
pd.link = pci_link->pl_id;
|
|
pci_pir_walk_table(pir_resume_find_device, &pd);
|
|
KASSERT(pd.bus != -1,
|
|
("did not find matching entry for link %#x in the $PIR table",
|
|
pci_link->pl_id));
|
|
if (bootverbose)
|
|
device_printf(dev,
|
|
"Using %d.%d.INT%c to route link %#x to IRQ %d\n",
|
|
pd.bus, pd.device, pd.pin + 'A',
|
|
pci_link->pl_id, pci_link->pl_irq);
|
|
error = pci_pir_biosroute(pd.bus, pd.device, 0, pd.pin,
|
|
pci_link->pl_irq);
|
|
if (error)
|
|
device_printf(dev,
|
|
"ROUTE_INTERRUPT on resume for link %#x failed.\n",
|
|
pci_link->pl_id);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t pir_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, pir_probe),
|
|
DEVMETHOD(device_attach, pir_attach),
|
|
DEVMETHOD(device_resume, pir_resume),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t pir_driver = {
|
|
"pir",
|
|
pir_methods,
|
|
1,
|
|
};
|
|
|
|
static devclass_t pir_devclass;
|
|
|
|
DRIVER_MODULE(pir, legacy, pir_driver, pir_devclass, 0, 0);
|