mptable_pci.c revision 215051 
179011Sdd/*-
279011Sdd * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
31590Srgrimes * All rights reserved.
41590Srgrimes *
51590Srgrimes * Redistribution and use in source and binary forms, with or without
61590Srgrimes * 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 215051 2010-11-09 20:28:09Z attilio $");
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
44#include <dev/pci/pcireg.h>
45#include <dev/pci/pcivar.h>
46#include <dev/pci/pcib_private.h>
47#include <x86/mptable.h>
48#include <machine/legacyvar.h>
49#include <machine/pci_cfgreg.h>
50
51#include "pcib_if.h"
52
53/* Host to PCI bridge driver. */
54
55static int
56mptable_hostb_probe(device_t dev)
57{
58
59	if (pci_cfgregopen() == 0)
60		return (ENXIO);
61	if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
62		return (ENXIO);
63	device_set_desc(dev, "MPTable Host-PCI bridge");
64	return (0);
65}
66
67static int
68mptable_hostb_attach(device_t dev)
69{
70
71	device_add_child(dev, "pci", pcib_get_bus(dev));
72	return (bus_generic_attach(dev));
73}
74
75/* Pass MSI requests up to the nexus. */
76static int
77mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
78    int *irqs)
79{
80	device_t bus;
81
82	bus = device_get_parent(pcib);
83	return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
84	    irqs));
85}
86
87static int
88mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
89{
90	device_t bus;
91
92	bus = device_get_parent(pcib);
93	return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
94}
95
96static int
97mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
98    uint32_t *data)
99{
100	device_t bus;
101
102	bus = device_get_parent(pcib);
103	return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
104}
105
106static device_method_t mptable_hostb_methods[] = {
107	/* Device interface */
108	DEVMETHOD(device_probe,		mptable_hostb_probe),
109	DEVMETHOD(device_attach,	mptable_hostb_attach),
110	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
111	DEVMETHOD(device_suspend,	bus_generic_suspend),
112	DEVMETHOD(device_resume,	bus_generic_resume),
113
114	/* Bus interface */
115	DEVMETHOD(bus_print_child,	bus_generic_print_child),
116	DEVMETHOD(bus_read_ivar,	legacy_pcib_read_ivar),
117	DEVMETHOD(bus_write_ivar,	legacy_pcib_write_ivar),
118	DEVMETHOD(bus_alloc_resource,	legacy_pcib_alloc_resource),
119	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
120	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
121	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
122	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
123	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
124
125	/* pcib interface */
126	DEVMETHOD(pcib_maxslots,	legacy_pcib_maxslots),
127	DEVMETHOD(pcib_read_config,	legacy_pcib_read_config),
128	DEVMETHOD(pcib_write_config,	legacy_pcib_write_config),
129	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
130	DEVMETHOD(pcib_alloc_msi,	mptable_hostb_alloc_msi),
131	DEVMETHOD(pcib_release_msi,	pcib_release_msi),
132	DEVMETHOD(pcib_alloc_msix,	mptable_hostb_alloc_msix),
133	DEVMETHOD(pcib_release_msix,	pcib_release_msix),
134	DEVMETHOD(pcib_map_msi,		mptable_hostb_map_msi),
135
136	{ 0, 0 }
137};
138
139static devclass_t hostb_devclass;
140
141DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1);
142DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
143
144/* PCI to PCI bridge driver. */
145
146static int
147mptable_pcib_probe(device_t dev)
148{
149	int bus;
150
151	if ((pci_get_class(dev) != PCIC_BRIDGE) ||
152	    (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
153		return (ENXIO);
154	bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
155	if (bus == 0)
156		return (ENXIO);
157	if (mptable_pci_probe_table(bus) != 0)
158		return (ENXIO);
159	device_set_desc(dev, "MPTable PCI-PCI bridge");
160	return (-1000);
161}
162
163static device_method_t mptable_pcib_pci_methods[] = {
164	/* Device interface */
165	DEVMETHOD(device_probe,		mptable_pcib_probe),
166
167	/* pcib interface */
168	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
169
170	{0, 0}
171};
172
173static devclass_t pcib_devclass;
174
175DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
176    sizeof(struct pcib_softc), pcib_driver);
177DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);
178