mptable_pci.c revision 221393 
1/*-
2 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
32 * interrupts from PCI devices to I/O APICs.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sys/x86/x86/mptable_pci.c 221393 2011-05-03 17:37:24Z jhb $");
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/rman.h>
44
45#include <dev/pci/pcireg.h>
46#include <dev/pci/pcivar.h>
47#include <dev/pci/pcib_private.h>
48#include <x86/mptable.h>
49#include <machine/legacyvar.h>
50#include <machine/pci_cfgreg.h>
51
52#include "pcib_if.h"
53
54/* Host to PCI bridge driver. */
55
56static int
57mptable_hostb_probe(device_t dev)
58{
59
60	if (pci_cfgregopen() == 0)
61		return (ENXIO);
62	if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
63		return (ENXIO);
64	device_set_desc(dev, "MPTable Host-PCI bridge");
65	return (0);
66}
67
68static int
69mptable_hostb_attach(device_t dev)
70{
71
72	device_add_child(dev, "pci", pcib_get_bus(dev));
73	return (bus_generic_attach(dev));
74}
75
76/* Pass MSI requests up to the nexus. */
77static int
78mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
79    int *irqs)
80{
81	device_t bus;
82
83	bus = device_get_parent(pcib);
84	return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
85	    irqs));
86}
87
88static int
89mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
90{
91	device_t bus;
92
93	bus = device_get_parent(pcib);
94	return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
95}
96
97static int
98mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
99    uint32_t *data)
100{
101	device_t bus;
102
103	bus = device_get_parent(pcib);
104	return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
105}
106
107static device_method_t mptable_hostb_methods[] = {
108	/* Device interface */
109	DEVMETHOD(device_probe,		mptable_hostb_probe),
110	DEVMETHOD(device_attach,	mptable_hostb_attach),
111	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
112	DEVMETHOD(device_suspend,	bus_generic_suspend),
113	DEVMETHOD(device_resume,	bus_generic_resume),
114
115	/* Bus interface */
116	DEVMETHOD(bus_print_child,	bus_generic_print_child),
117	DEVMETHOD(bus_read_ivar,	legacy_pcib_read_ivar),
118	DEVMETHOD(bus_write_ivar,	legacy_pcib_write_ivar),
119	DEVMETHOD(bus_alloc_resource,	legacy_pcib_alloc_resource),
120	DEVMETHOD(bus_adjust_resource,	bus_generic_adjust_resource),
121	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
122	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
123	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
124	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
125	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
126
127	/* pcib interface */
128	DEVMETHOD(pcib_maxslots,	legacy_pcib_maxslots),
129	DEVMETHOD(pcib_read_config,	legacy_pcib_read_config),
130	DEVMETHOD(pcib_write_config,	legacy_pcib_write_config),
131	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
132	DEVMETHOD(pcib_alloc_msi,	mptable_hostb_alloc_msi),
133	DEVMETHOD(pcib_release_msi,	pcib_release_msi),
134	DEVMETHOD(pcib_alloc_msix,	mptable_hostb_alloc_msix),
135	DEVMETHOD(pcib_release_msix,	pcib_release_msix),
136	DEVMETHOD(pcib_map_msi,		mptable_hostb_map_msi),
137
138	{ 0, 0 }
139};
140
141static devclass_t hostb_devclass;
142
143DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1);
144DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
145
146/* PCI to PCI bridge driver. */
147
148static int
149mptable_pcib_probe(device_t dev)
150{
151	int bus;
152
153	if ((pci_get_class(dev) != PCIC_BRIDGE) ||
154	    (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
155		return (ENXIO);
156	bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
157	if (bus == 0)
158		return (ENXIO);
159	if (mptable_pci_probe_table(bus) != 0)
160		return (ENXIO);
161	device_set_desc(dev, "MPTable PCI-PCI bridge");
162	return (-1000);
163}
164
165static device_method_t mptable_pcib_pci_methods[] = {
166	/* Device interface */
167	DEVMETHOD(device_probe,		mptable_pcib_probe),
168
169	/* pcib interface */
170	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
171
172	{0, 0}
173};
174
175static devclass_t pcib_devclass;
176
177DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
178    sizeof(struct pcib_softc), pcib_driver);
179DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);
180