pci_passthru.c (4d846d260e2b9a3d4d0a701462568268cbfe7a5b) pci_passthru.c (90c3a1b6629c80a7e4c3fa86d6b794596fdf06b4)
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011 NetApp, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

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59#include <err.h>
60#include <errno.h>
61#include <fcntl.h>
62#include <sysexits.h>
63#include <unistd.h>
64
65#include <machine/vmm.h>
66
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011 NetApp, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

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59#include <err.h>
60#include <errno.h>
61#include <fcntl.h>
62#include <sysexits.h>
63#include <unistd.h>
64
65#include <machine/vmm.h>
66
67#include "config.h"
68#include "debug.h"
69#include "mem.h"
70#include "pci_passthru.h"
71
72#ifndef _PATH_DEVPCI
73#define _PATH_DEVPCI "/dev/pci"
74#endif
75
76#define LEGACY_SUPPORT 1
77
78#define MSIX_TABLE_COUNT(ctrl) (((ctrl) & PCIM_MSIXCTRL_TABLE_SIZE) + 1)
79#define MSIX_CAPLEN 12
80
81#define PASSTHRU_MMIO_MAX 2
82
83static int pcifd = -1;
84
67#include "debug.h"
68#include "mem.h"
69#include "pci_passthru.h"
70
71#ifndef _PATH_DEVPCI
72#define _PATH_DEVPCI "/dev/pci"
73#endif
74
75#define LEGACY_SUPPORT 1
76
77#define MSIX_TABLE_COUNT(ctrl) (((ctrl) & PCIM_MSIXCTRL_TABLE_SIZE) + 1)
78#define MSIX_CAPLEN 12
79
80#define PASSTHRU_MMIO_MAX 2
81
82static int pcifd = -1;
83
84SET_DECLARE(passthru_dev_set, struct passthru_dev);
85
85struct passthru_softc {
86 struct pci_devinst *psc_pi;
87 /* ROM is handled like a BAR */
88 struct pcibar psc_bar[PCI_BARMAX_WITH_ROM + 1];
89 struct {
90 int capoff;
91 int msgctrl;
92 int emulated;

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851 return (true);
852}
853
854static int
855passthru_init(struct pci_devinst *pi, nvlist_t *nvl)
856{
857 int bus, slot, func, error, memflags;
858 struct passthru_softc *sc;
86struct passthru_softc {
87 struct pci_devinst *psc_pi;
88 /* ROM is handled like a BAR */
89 struct pcibar psc_bar[PCI_BARMAX_WITH_ROM + 1];
90 struct {
91 int capoff;
92 int msgctrl;
93 int emulated;

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852 return (true);
853}
854
855static int
856passthru_init(struct pci_devinst *pi, nvlist_t *nvl)
857{
858 int bus, slot, func, error, memflags;
859 struct passthru_softc *sc;
860 struct passthru_dev **devpp;
861 struct passthru_dev *devp, *dev = NULL;
859 const char *value;
860
861 sc = NULL;
862 error = 1;
863
864 memflags = vm_get_memflags(pi->pi_vmctx);
865 if (!(memflags & VM_MEM_F_WIRED)) {
866 warnx("passthru requires guest memory to be wired");

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914 if ((error = set_pcir_handler(sc, 0, PCIR_MAXLAT + 1,
915 passthru_cfgread_emulate, passthru_cfgwrite_emulate)) != 0)
916 goto done;
917
918 /* Allow access to the physical command and status register. */
919 if ((error = set_pcir_handler(sc, PCIR_COMMAND, 0x04, NULL, NULL)) != 0)
920 goto done;
921
862 const char *value;
863
864 sc = NULL;
865 error = 1;
866
867 memflags = vm_get_memflags(pi->pi_vmctx);
868 if (!(memflags & VM_MEM_F_WIRED)) {
869 warnx("passthru requires guest memory to be wired");

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917 if ((error = set_pcir_handler(sc, 0, PCIR_MAXLAT + 1,
918 passthru_cfgread_emulate, passthru_cfgwrite_emulate)) != 0)
919 goto done;
920
921 /* Allow access to the physical command and status register. */
922 if ((error = set_pcir_handler(sc, PCIR_COMMAND, 0x04, NULL, NULL)) != 0)
923 goto done;
924
925 SET_FOREACH(devpp, passthru_dev_set) {
926 devp = *devpp;
927 assert(devp->probe != NULL);
928 if (devp->probe(pi) == 0) {
929 dev = devp;
930 break;
931 }
932 }
933
934 if (dev != NULL) {
935 error = dev->init(pi, nvl);
936 if (error != 0)
937 goto done;
938 }
939
922 error = 0; /* success */
923done:
924 if (error) {
940 error = 0; /* success */
941done:
942 if (error) {
943 if (dev != NULL)
944 dev->deinit(pi);
925 free(sc);
926 vm_unassign_pptdev(pi->pi_vmctx, bus, slot, func);
927 }
928 return (error);
929}
930
931static int
932msicap_access(struct passthru_softc *sc, int coff)

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946 vm_unassign_pptdev(pi->pi_vmctx, bus, slot, func);
947 }
948 return (error);
949}
950
951static int
952msicap_access(struct passthru_softc *sc, int coff)

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