1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 /*
29 * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
30 * interrupts from PCI devices to I/O APICs.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bus.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/rman.h>
39
40 #include <dev/pci/pcireg.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/pci/pcib_private.h>
43 #include <x86/mptable.h>
44 #include <x86/legacyvar.h>
45 #include <machine/pci_cfgreg.h>
46
47 #include "pcib_if.h"
48
49 /* Host to PCI bridge driver. */
50
51 static int
mptable_hostb_probe(device_t dev)52 mptable_hostb_probe(device_t dev)
53 {
54
55 if (pci_cfgregopen() == 0)
56 return (ENXIO);
57 if (mptable_pci_probe_table(legacy_get_pcibus(dev)) != 0)
58 return (ENXIO);
59 device_set_desc(dev, "MPTable Host-PCI bridge");
60 return (0);
61 }
62
63 static int
mptable_hostb_attach(device_t dev)64 mptable_hostb_attach(device_t dev)
65 {
66
67 mptable_pci_host_res_init(dev);
68 device_add_child(dev, "pci", DEVICE_UNIT_ANY);
69 bus_attach_children(dev);
70 return (0);
71 }
72
73 static int
mptable_is_isa_range(rman_res_t start,rman_res_t end)74 mptable_is_isa_range(rman_res_t start, rman_res_t end)
75 {
76
77 if (end >= 0x10000)
78 return (0);
79 if ((start & 0xfc00) != (end & 0xfc00))
80 return (0);
81 start &= ~0xfc00;
82 end &= ~0xfc00;
83 return (start >= 0x100 && end <= 0x3ff);
84 }
85
86 static int
mptable_is_vga_range(rman_res_t start,rman_res_t end)87 mptable_is_vga_range(rman_res_t start, rman_res_t end)
88 {
89 if (end >= 0x10000)
90 return (0);
91 if ((start & 0xfc00) != (end & 0xfc00))
92 return (0);
93 start &= ~0xfc00;
94 end &= ~0xfc00;
95 return (pci_is_vga_ioport_range(start, end));
96 }
97
98 static struct resource *
mptable_hostb_alloc_resource(device_t dev,device_t child,int type,int * rid,rman_res_t start,rman_res_t end,rman_res_t count,u_int flags)99 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
100 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
101 {
102 struct mptable_hostb_softc *sc;
103
104 if (type == PCI_RES_BUS)
105 return (pci_domain_alloc_bus(0, child, rid, start, end, count,
106 flags));
107 sc = device_get_softc(dev);
108 if (type == SYS_RES_IOPORT && start + count - 1 == end) {
109 if (mptable_is_isa_range(start, end)) {
110 switch (sc->sc_decodes_isa_io) {
111 case -1:
112 return (NULL);
113 case 1:
114 return (bus_generic_alloc_resource(dev, child,
115 type, rid, start, end, count, flags));
116 default:
117 break;
118 }
119 }
120 if (mptable_is_vga_range(start, end)) {
121 switch (sc->sc_decodes_vga_io) {
122 case -1:
123 return (NULL);
124 case 1:
125 return (bus_generic_alloc_resource(dev, child,
126 type, rid, start, end, count, flags));
127 default:
128 break;
129 }
130 }
131 }
132 start = hostb_alloc_start(type, start, end, count);
133 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start,
134 end, count, flags));
135 }
136
137 static int
mptable_hostb_adjust_resource(device_t dev,device_t child,struct resource * r,rman_res_t start,rman_res_t end)138 mptable_hostb_adjust_resource(device_t dev, device_t child,
139 struct resource *r, rman_res_t start, rman_res_t end)
140 {
141 struct mptable_hostb_softc *sc;
142
143 if (rman_get_type(r) == PCI_RES_BUS)
144 return (pci_domain_adjust_bus(0, child, r, start, end));
145 sc = device_get_softc(dev);
146 return (pcib_host_res_adjust(&sc->sc_host_res, child, r, start, end));
147 }
148
149 static device_method_t mptable_hostb_methods[] = {
150 /* Device interface */
151 DEVMETHOD(device_probe, mptable_hostb_probe),
152 DEVMETHOD(device_attach, mptable_hostb_attach),
153 DEVMETHOD(device_shutdown, bus_generic_shutdown),
154 DEVMETHOD(device_suspend, bus_generic_suspend),
155 DEVMETHOD(device_resume, bus_generic_resume),
156
157 /* Bus interface */
158 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar),
159 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar),
160 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource),
161 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource),
162 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource),
163 DEVMETHOD(bus_activate_resource, legacy_pcib_activate_resource),
164 DEVMETHOD(bus_deactivate_resource, legacy_pcib_deactivate_resource),
165 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
166 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
167
168 /* pcib interface */
169 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots),
170 DEVMETHOD(pcib_read_config, legacy_pcib_read_config),
171 DEVMETHOD(pcib_write_config, legacy_pcib_write_config),
172 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
173 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi),
174 DEVMETHOD(pcib_release_msi, pcib_release_msi),
175 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix),
176 DEVMETHOD(pcib_release_msix, pcib_release_msix),
177 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi),
178
179 DEVMETHOD_END
180 };
181
182 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods,
183 sizeof(struct mptable_hostb_softc));
184 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, 0, 0);
185
186 /* PCI to PCI bridge driver. */
187
188 static int
mptable_pcib_probe(device_t dev)189 mptable_pcib_probe(device_t dev)
190 {
191 int bus;
192
193 if ((pci_get_class(dev) != PCIC_BRIDGE) ||
194 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
195 return (ENXIO);
196 bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
197 if (bus == 0)
198 return (ENXIO);
199 if (mptable_pci_probe_table(bus) != 0)
200 return (ENXIO);
201 device_set_desc(dev, "MPTable PCI-PCI bridge");
202 return (-1000);
203 }
204
205 static device_method_t mptable_pcib_pci_methods[] = {
206 /* Device interface */
207 DEVMETHOD(device_probe, mptable_pcib_probe),
208
209 /* pcib interface */
210 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
211 {0, 0}
212 };
213
214 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
215 sizeof(struct pcib_softc), pcib_driver);
216 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, 0, 0);
217