1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/rman.h>
42
43#include <dev/pci/pcireg.h>
44#include <dev/pci/pcivar.h>
45#include <dev/pci/pcib_private.h>
46#include <x86/mptable.h>
47#include <x86/legacyvar.h>
48#include <machine/pci_cfgreg.h>
49
50#include "pcib_if.h"
51
52/* Host to PCI bridge driver. */
53
54static int
55mptable_hostb_probe(device_t dev)
56{
57
58	if (pci_cfgregopen() == 0)
59		return (ENXIO);
60	if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
61		return (ENXIO);
62	device_set_desc(dev, "MPTable Host-PCI bridge");
63	return (0);
64}
65
66static int
67mptable_hostb_attach(device_t dev)
68{
69
70#ifdef NEW_PCIB
71	mptable_pci_host_res_init(dev);
72#endif
73	device_add_child(dev, "pci", -1);
74	return (bus_generic_attach(dev));
75}
76
77#ifdef NEW_PCIB
78static int
79mptable_is_isa_range(rman_res_t start, rman_res_t end)
80{
81
82	if (end >= 0x10000)
83		return (0);
84	if ((start & 0xfc00) != (end & 0xfc00))
85		return (0);
86	start &= ~0xfc00;
87	end &= ~0xfc00;
88	return (start >= 0x100 && end <= 0x3ff);
89}
90
91static int
92mptable_is_vga_range(rman_res_t start, rman_res_t end)
93{
94	if (end >= 0x10000)
95		return (0);
96	if ((start & 0xfc00) != (end & 0xfc00))
97		return (0);
98	start &= ~0xfc00;
99	end &= ~0xfc00;
100	return (pci_is_vga_ioport_range(start, end));
101}
102
103static struct resource *
104mptable_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid,
105    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
106{
107	struct mptable_hostb_softc *sc;
108
109#ifdef PCI_RES_BUS
110	if (type == PCI_RES_BUS)
111		return (pci_domain_alloc_bus(0, child, rid, start, end, count,
112		    flags));
113#endif
114	sc = device_get_softc(dev);
115	if (type == SYS_RES_IOPORT && start + count - 1 == end) {
116		if (mptable_is_isa_range(start, end)) {
117			switch (sc->sc_decodes_isa_io) {
118			case -1:
119				return (NULL);
120			case 1:
121				return (bus_generic_alloc_resource(dev, child,
122				    type, rid, start, end, count, flags));
123			default:
124				break;
125			}
126		}
127		if (mptable_is_vga_range(start, end)) {
128			switch (sc->sc_decodes_vga_io) {
129			case -1:
130				return (NULL);
131			case 1:
132				return (bus_generic_alloc_resource(dev, child,
133				    type, rid, start, end, count, flags));
134			default:
135				break;
136			}
137		}
138	}
139	start = hostb_alloc_start(type, start, end, count);
140	return (pcib_host_res_alloc(&sc->sc_host_res, child, type, rid, start,
141	    end, count, flags));
142}
143
144static int
145mptable_hostb_adjust_resource(device_t dev, device_t child, int type,
146    struct resource *r, rman_res_t start, rman_res_t end)
147{
148	struct mptable_hostb_softc *sc;
149
150#ifdef PCI_RES_BUS
151	if (type == PCI_RES_BUS)
152		return (pci_domain_adjust_bus(0, child, r, start, end));
153#endif
154	sc = device_get_softc(dev);
155	return (pcib_host_res_adjust(&sc->sc_host_res, child, type, r, start,
156	    end));
157}
158#endif
159
160static device_method_t mptable_hostb_methods[] = {
161	/* Device interface */
162	DEVMETHOD(device_probe,		mptable_hostb_probe),
163	DEVMETHOD(device_attach,	mptable_hostb_attach),
164	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
165	DEVMETHOD(device_suspend,	bus_generic_suspend),
166	DEVMETHOD(device_resume,	bus_generic_resume),
167
168	/* Bus interface */
169	DEVMETHOD(bus_read_ivar,	legacy_pcib_read_ivar),
170	DEVMETHOD(bus_write_ivar,	legacy_pcib_write_ivar),
171#ifdef NEW_PCIB
172	DEVMETHOD(bus_alloc_resource,	mptable_hostb_alloc_resource),
173	DEVMETHOD(bus_adjust_resource,	mptable_hostb_adjust_resource),
174#else
175	DEVMETHOD(bus_alloc_resource,	legacy_pcib_alloc_resource),
176	DEVMETHOD(bus_adjust_resource,	bus_generic_adjust_resource),
177#endif
178#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
179	DEVMETHOD(bus_release_resource,	legacy_pcib_release_resource),
180#else
181	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
182#endif
183	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
184	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
185	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
186	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
187
188	/* pcib interface */
189	DEVMETHOD(pcib_maxslots,	legacy_pcib_maxslots),
190	DEVMETHOD(pcib_read_config,	legacy_pcib_read_config),
191	DEVMETHOD(pcib_write_config,	legacy_pcib_write_config),
192	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
193	DEVMETHOD(pcib_alloc_msi,	legacy_pcib_alloc_msi),
194	DEVMETHOD(pcib_release_msi,	pcib_release_msi),
195	DEVMETHOD(pcib_alloc_msix,	legacy_pcib_alloc_msix),
196	DEVMETHOD(pcib_release_msix,	pcib_release_msix),
197	DEVMETHOD(pcib_map_msi,		legacy_pcib_map_msi),
198
199	DEVMETHOD_END
200};
201
202static devclass_t hostb_devclass;
203
204DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods,
205    sizeof(struct mptable_hostb_softc));
206DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
207
208/* PCI to PCI bridge driver. */
209
210static int
211mptable_pcib_probe(device_t dev)
212{
213	int bus;
214
215	if ((pci_get_class(dev) != PCIC_BRIDGE) ||
216	    (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
217		return (ENXIO);
218	bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
219	if (bus == 0)
220		return (ENXIO);
221	if (mptable_pci_probe_table(bus) != 0)
222		return (ENXIO);
223	device_set_desc(dev, "MPTable PCI-PCI bridge");
224	return (-1000);
225}
226
227static device_method_t mptable_pcib_pci_methods[] = {
228	/* Device interface */
229	DEVMETHOD(device_probe,		mptable_pcib_probe),
230
231	/* pcib interface */
232	DEVMETHOD(pcib_route_interrupt,	mptable_pci_route_interrupt),
233	{0, 0}
234};
235
236static devclass_t pcib_devclass;
237
238DEFINE_CLASS_1(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
239    sizeof(struct pcib_softc), pcib_driver);
240DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);
241