75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * CDDL HEADER START
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * The contents of this file are subject to the terms of the
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Common Development and Distribution License (the "License").
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * You may not use this file except in compliance with the License.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * or http://www.opensolaris.org/os/licensing.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * See the License for the specific language governing permissions
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * and limitations under the License.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * When distributing Covered Code, include this CDDL HEADER in each
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * If applicable, add the following below this CDDL HEADER, with the
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * fields enclosed by brackets "[]" replaced with your own identifying
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * information: Portions Copyright [yyyy] [name of copyright owner]
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * CDDL HEADER END
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
0db3240d392634cfff2f95fb6da34b56b8dc574fStephen Hanson * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/types.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/stat.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/sunndi.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/pci.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/pci_impl.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/pci_cfgspace.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/pci_cfgspace_impl.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/memlist.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/bootconf.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg#include <sys/psw.h>
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * pci irq routing information table
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
0db3240d392634cfff2f95fb6da34b56b8dc574fStephen Hansonint pci_irq_nroutes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstatic pci_irq_route_t *pci_irq_routes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstatic int pci_bios_get_irq_routing(pci_irq_route_t *, int, int *);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstatic void pci_get_irq_routing_table(void);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Retrieve information from the bios needed for system
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * configuration early during startup.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgvoid
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstartup_pci_bios(void)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg{
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg pci_get_irq_routing_table();
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg}
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Issue the bios get irq routing information table interrupt
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Despite the name, the information in the table is only
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * used to derive slot names for some named pci hot-plug slots.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Returns the number of irq routing table entries returned
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * by the bios, or 0 and optionally, the number of entries required.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstatic int
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgpci_bios_get_irq_routing(pci_irq_route_t *routes, int nroutes, int *nneededp)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg{
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg struct bop_regs regs;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg uchar_t *hdrp;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg uchar_t *bufp;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int i, n;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int rval = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nneededp)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *nneededp = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg /*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Set up irq routing header with the size and address
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * of some useable low-memory data addresses. Initalize
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * data area to zero, avoiding memcpy/bzero.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg hdrp = (uchar_t *)BIOS_IRQ_ROUTING_HDR;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg bufp = (uchar_t *)BIOS_IRQ_ROUTING_DATA;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg n = nroutes * sizeof (pci_irq_route_t);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (i = 0; i < n; i++)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg bufp[i] = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg ((pci_irq_route_hdr_t *)hdrp)->pir_size = n;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg ((pci_irq_route_hdr_t *)hdrp)->pir_addr = (uint32_t)(uintptr_t)bufp;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg bzero(&regs, sizeof (regs));
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg regs.eax.word.ax = (PCI_FUNCTION_ID << 8) | PCI_GET_IRQ_ROUTING;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg regs.ds = 0xf000;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg regs.es = FP_SEG((uint_t)(uintptr_t)hdrp);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg regs.edi.word.di = FP_OFF((uint_t)(uintptr_t)hdrp);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg BOP_DOINT(bootops, 0x1a, &regs);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg n = (int)(((pci_irq_route_hdr_t *)hdrp)->pir_size /
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg sizeof (pci_irq_route_t));
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if ((regs.eflags & PS_C) != 0) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nneededp)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *nneededp = n;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg } else {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg /*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Copy resulting irq routing data from low memory up to
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * the kernel address space, avoiding memcpy as usual.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (n <= nroutes) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (i = 0; i < n * sizeof (pci_irq_route_t); i++)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg ((uchar_t *)routes)[i] = bufp[i];
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg rval = n;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return (rval);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg}
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgstatic void
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgpci_get_irq_routing_table(void)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg{
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg pci_irq_route_t *routes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int n = N_PCI_IRQ_ROUTES;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int nneeded = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int nroutes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg /*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Get irq routing table information.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Allocate a buffer for an initial default number of entries.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * If the bios indicates it needs a larger buffer, try it again.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Drive on if it still won't cooperate and play nice after that.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg routes = kmem_zalloc(n * sizeof (pci_irq_route_t), KM_SLEEP);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg nroutes = pci_bios_get_irq_routing(routes, n, &nneeded);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nroutes == 0 && nneeded > n) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg kmem_free(routes, n * sizeof (pci_irq_route_t));
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nneeded > N_PCI_IRQ_ROUTES_MAX) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg cmn_err(CE_CONT,
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg "pci: unable to get IRQ routing information, "
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg "required buffer space of %d entries exceeds max\n",
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg nneeded);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg n = nneeded;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg routes = kmem_zalloc(n * sizeof (pci_irq_route_t), KM_SLEEP);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg nroutes = pci_bios_get_irq_routing(routes, n, NULL);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nroutes == 0) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg cmn_err(CE_CONT,
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg "pci: unable to get IRQ routing information, "
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg "required buffer space for %d entries\n", n);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg kmem_free(routes, n * sizeof (pci_irq_route_t));
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nroutes > 0) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg pci_irq_routes = routes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg pci_irq_nroutes = nroutes;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg}
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg/*
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Use the results of the PCI BIOS call that returned the routing tables
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * to build the 1275 slot-names property for the indicated bus.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * Results are returned in buf. Length is return value, -1 is returned on
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg * overflow and zero is returned if no data exists to build a property.
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg */
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgint
75bcd4562dc154f3737c4f78b57bb9c638d16b43jgpci_slot_names_prop(int bus, char *buf, int len)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg{
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg uchar_t dev;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg uchar_t slot[N_PCI_IRQ_ROUTES_MAX+1];
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg uint32_t mask;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg int i, nnames, plen;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg ASSERT(pci_irq_nroutes <= N_PCI_IRQ_ROUTES_MAX);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (pci_irq_nroutes == 0)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return (0);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg nnames = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg mask = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (i = 0; i < pci_irq_nroutes; i++)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg slot[i] = 0xff;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (i = 0; i < pci_irq_nroutes; i++) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (pci_irq_routes[i].pir_bus != bus)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg continue;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (pci_irq_routes[i].pir_slot != 0) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg dev = (pci_irq_routes[i].pir_dev & 0xf8) >> 3;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg slot[dev] = pci_irq_routes[i].pir_slot;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg mask |= (1 << dev);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg nnames++;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (nnames == 0)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return (0);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (len < (4 + nnames * 8))
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return (-1);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *(uint32_t *)buf = mask;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg plen = 4;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (i = 0; i < pci_irq_nroutes; i++) {
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg if (slot[i] == 0xff)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg continue;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg (void) sprintf(buf + plen, "Slot%d", slot[i]);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg plen += strlen(buf+plen) + 1;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *(buf + plen) = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg }
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg for (; plen % 4; plen++)
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg *(buf + plen) = 0;
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg return (plen);
75bcd4562dc154f3737c4f78b57bb9c638d16b43jg}