ofw_pcib_pci.c revision 265969 
1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
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#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/10/sys/powerpc/ofw/ofw_pcib_pci.c 265969 2014-05-13 18:06:26Z ian $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/module.h>
34#include <sys/bus.h>
35#include <sys/malloc.h>
36#include <sys/kernel.h>
37
38#include <dev/ofw/openfirm.h>
39#include <dev/ofw/ofw_pci.h>
40#include <dev/ofw/ofw_bus.h>
41#include <dev/ofw/ofw_bus_subr.h>
42
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcireg.h>
45#include <dev/pci/pcib_private.h>
46
47#include <machine/intr_machdep.h>
48
49#include "pcib_if.h"
50
51static int	ofw_pcib_pci_probe(device_t bus);
52static int	ofw_pcib_pci_attach(device_t bus);
53static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev);
54static int	ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev,
55		    int intpin);
56
57static device_method_t ofw_pcib_pci_methods[] = {
58	/* Device interface */
59	DEVMETHOD(device_probe,		ofw_pcib_pci_probe),
60	DEVMETHOD(device_attach,	ofw_pcib_pci_attach),
61
62	/* pcib interface */
63	DEVMETHOD(pcib_route_interrupt,	ofw_pcib_pci_route_interrupt),
64
65	/* ofw_bus interface */
66	DEVMETHOD(ofw_bus_get_node,	ofw_pcib_pci_get_node),
67
68	DEVMETHOD_END
69};
70
71static devclass_t pcib_devclass;
72
73struct ofw_pcib_softc {
74        /*
75         * This is here so that we can use pci bridge methods, too - the
76         * generic routines only need the dev, secbus and subbus members
77         * filled.
78         */
79        struct pcib_softc       ops_pcib_sc;
80	phandle_t		ops_node;
81        struct ofw_bus_iinfo    ops_iinfo;
82};
83
84DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods,
85    sizeof(struct ofw_pcib_softc), pcib_driver);
86DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0);
87
88static int
89ofw_pcib_pci_probe(device_t dev)
90{
91
92	if ((pci_get_class(dev) != PCIC_BRIDGE) ||
93	    (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) {
94		return (ENXIO);
95	}
96
97	if (ofw_bus_get_node(dev) == -1)
98		return (ENXIO);
99
100	device_set_desc(dev, "OFW PCI-PCI bridge");
101	return (0);
102}
103
104static int
105ofw_pcib_pci_attach(device_t dev)
106{
107	struct ofw_pcib_softc *sc;
108
109	sc = device_get_softc(dev);
110	sc->ops_pcib_sc.dev = dev;
111	sc->ops_node = ofw_bus_get_node(dev);
112
113	ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
114	    sizeof(cell_t));
115
116	pcib_attach_common(dev);
117
118	device_add_child(dev, "pci", -1);
119
120	return (bus_generic_attach(dev));
121}
122
123static phandle_t
124ofw_pcib_pci_get_node(device_t bridge, device_t dev)
125{
126	/* We have only one child, the PCI bus, so pass it our node */
127
128	return (ofw_bus_get_node(bridge));
129}
130
131static int
132ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin)
133{
134	struct ofw_pcib_softc *sc;
135	struct ofw_bus_iinfo *ii;
136	struct ofw_pci_register reg;
137	cell_t pintr, mintr;
138	phandle_t iparent;
139	uint8_t maskbuf[sizeof(reg) + sizeof(pintr)];
140
141	sc = device_get_softc(bridge);
142	ii = &sc->ops_iinfo;
143	if (ii->opi_imapsz > 0) {
144		pintr = intpin;
145
146		/* Fabricate imap information if this isn't an OFW device */
147		bzero(&reg, sizeof(reg));
148		reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) |
149		    (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) |
150		    (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT);
151
152		if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, &reg,
153		    sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr),
154		    &iparent, maskbuf)) {
155			/*
156			 * If we've found a mapping, return it and don't map
157			 * it again on higher levels - that causes problems
158			 * in some cases, and never seems to be required.
159			 */
160			return (ofw_bus_map_intr(dev, iparent, mintr));
161		}
162	} else if (intpin >= 1 && intpin <= 4) {
163		/*
164		 * When an interrupt map is missing, we need to do the
165		 * standard PCI swizzle and continue mapping at the parent.
166		 */
167		return (pcib_route_interrupt(bridge, dev, intpin));
168	}
169	return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent(
170	    bridge)), bridge, intpin));
171}
172
173