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 #ifdef NEW_PCIB
68 mptable_pci_host_res_init(dev);
69 #endif
70 device_add_child(dev, "pci", -1);
71 return (bus_generic_attach(dev));
72 }
73
74 #ifdef NEW_PCIB
75 static int
mptable_is_isa_range(rman_res_t start,rman_res_t end)76 mptable_is_isa_range(rman_res_t start, rman_res_t end)
77 {
78
79 if (end >= 0x10000)
80 return (0);
81 if ((start & 0xfc00) != (end & 0xfc00))
82 return (0);
83 start &= ~0xfc00;
84 end &= ~0xfc00;
85 return (start >= 0x100 && end <= 0x3ff);
86 }
87
88 static int
mptable_is_vga_range(rman_res_t start,rman_res_t end)89 mptable_is_vga_range(rman_res_t start, rman_res_t end)
90 {
91 if (end >= 0x10000)
92 return (0);
93 if ((start & 0xfc00) != (end & 0xfc00))
94 return (0);
95 start &= ~0xfc00;
96 end &= ~0xfc00;
97 return (pci_is_vga_ioport_range(start, end));
98 }
99
100 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)101 mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
102 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
103 {
104 struct mptable_hostb_softc *sc;
105
106 #ifdef PCI_RES_BUS
107 if (type == PCI_RES_BUS)
108 return (pci_domain_alloc_bus(0, child, rid, start, end, count,
109 flags));
110 #endif
111 sc = device_get_softc(dev);
112 if (type == SYS_RES_IOPORT && start + count - 1 == end) {
113 if (mptable_is_isa_range(start, end)) {
114 switch (sc->sc_decodes_isa_io) {
115 case -1:
116 return (NULL);
117 case 1:
118 return (bus_generic_alloc_resource(dev, child,
119 type, rid, start, end, count, flags));
120 default:
121 break;
122 }
123 }
124 if (mptable_is_vga_range(start, end)) {
125 switch (sc->sc_decodes_vga_io) {
126 case -1:
127 return (NULL);
128 case 1:
129 return (bus_generic_alloc_resource(dev, child,
130 type, rid, start, end, count, flags));
131 default:
132 break;
133 }
134 }
135 }
136 start = hostb_alloc_start(type, start, end, count);
137 return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start,
138 end, count, flags));
139 }
140
141 static int
mptable_hostb_adjust_resource(device_t dev,device_t child,struct resource * r,rman_res_t start,rman_res_t end)142 mptable_hostb_adjust_resource(device_t dev, device_t child,
143 struct resource *r, rman_res_t start, rman_res_t end)
144 {
145 struct mptable_hostb_softc *sc;
146
147 #ifdef PCI_RES_BUS
148 if (rman_get_type(r) == PCI_RES_BUS)
149 return (pci_domain_adjust_bus(0, child, r, start, end));
150 #endif
151 sc = device_get_softc(dev);
152 return (pcib_host_res_adjust(&sc->sc_host_res, child, r, start, end));
153 }
154 #endif
155
156 static device_method_t mptable_hostb_methods[] = {
157 /* Device interface */
158 DEVMETHOD(device_probe, mptable_hostb_probe),
159 DEVMETHOD(device_attach, mptable_hostb_attach),
160 DEVMETHOD(device_shutdown, bus_generic_shutdown),
161 DEVMETHOD(device_suspend, bus_generic_suspend),
162 DEVMETHOD(device_resume, bus_generic_resume),
163
164 /* Bus interface */
165 DEVMETHOD(bus_read_ivar, legacy_pcib_read_ivar),
166 DEVMETHOD(bus_write_ivar, legacy_pcib_write_ivar),
167 #ifdef NEW_PCIB
168 DEVMETHOD(bus_alloc_resource, mptable_hostb_alloc_resource),
169 DEVMETHOD(bus_adjust_resource, mptable_hostb_adjust_resource),
170 #else
171 DEVMETHOD(bus_alloc_resource, legacy_pcib_alloc_resource),
172 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
173 #endif
174 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
175 DEVMETHOD(bus_release_resource, legacy_pcib_release_resource),
176 DEVMETHOD(bus_activate_resource, legacy_pcib_activate_resource),
177 DEVMETHOD(bus_deactivate_resource, legacy_pcib_deactivate_resource),
178 #else
179 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
180 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
181 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
182 #endif
183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
185
186 /* pcib interface */
187 DEVMETHOD(pcib_maxslots, legacy_pcib_maxslots),
188 DEVMETHOD(pcib_read_config, legacy_pcib_read_config),
189 DEVMETHOD(pcib_write_config, legacy_pcib_write_config),
190 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
191 DEVMETHOD(pcib_alloc_msi, legacy_pcib_alloc_msi),
192 DEVMETHOD(pcib_release_msi, pcib_release_msi),
193 DEVMETHOD(pcib_alloc_msix, legacy_pcib_alloc_msix),
194 DEVMETHOD(pcib_release_msix, pcib_release_msix),
195 DEVMETHOD(pcib_map_msi, legacy_pcib_map_msi),
196
197 DEVMETHOD_END
198 };
199
200 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods,
201 sizeof(struct mptable_hostb_softc));
202 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, 0, 0);
203
204 /* PCI to PCI bridge driver. */
205
206 static int
mptable_pcib_probe(device_t dev)207 mptable_pcib_probe(device_t dev)
208 {
209 int bus;
210
211 if ((pci_get_class(dev) != PCIC_BRIDGE) ||
212 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
213 return (ENXIO);
214 bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
215 if (bus == 0)
216 return (ENXIO);
217 if (mptable_pci_probe_table(bus) != 0)
218 return (ENXIO);
219 device_set_desc(dev, "MPTable PCI-PCI bridge");
220 return (-1000);
221 }
222
223 static device_method_t mptable_pcib_pci_methods[] = {
224 /* Device interface */
225 DEVMETHOD(device_probe, mptable_pcib_probe),
226
227 /* pcib interface */
228 DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
229 {0, 0}
230 };
231
232 DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
233 sizeof(struct pcib_softc), pcib_driver);
234 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, 0, 0);
235