1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
5 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
6 * Copyright (c) 2000 BSDi
7 * Copyright (c) 2001 - 2003 Thomas Moestl <tmm@FreeBSD.org>
8 * Copyright (c) 2009 by Marius Strobl <marius@FreeBSD.org>
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: stable/12/sys/sparc64/pci/ofw_pcib.c 326262 2017-11-27 15:10:39Z pfg $");
39
40 #include "opt_ofw_pci.h"
41
42 #include <sys/param.h>
43 #include <sys/bus.h>
44 #include <sys/kernel.h>
45 #include <sys/libkern.h>
46 #include <sys/module.h>
47 #include <sys/rman.h>
48
49 #include <dev/ofw/ofw_bus.h>
50 #include <dev/ofw/openfirm.h>
51
52 #include <dev/pci/pcireg.h>
53 #include <dev/pci/pcivar.h>
54 #include <dev/pci/pcib_private.h>
55
56 #include "pcib_if.h"
57
58 #include <sparc64/pci/ofw_pci.h>
59 #include <sparc64/pci/ofw_pcib_subr.h>
60
61 #define PCI_DEVID_ALI_M5249 0x524910b9
62 #define PCI_VENDOR_PLX 0x10b5
63
64 static device_probe_t ofw_pcib_probe;
65 static device_attach_t ofw_pcib_attach;
66 static ofw_pci_setup_device_t ofw_pcib_setup_device;
67
68 static device_method_t ofw_pcib_methods[] = {
69 /* Device interface */
70 DEVMETHOD(device_probe, ofw_pcib_probe),
71 DEVMETHOD(device_attach, ofw_pcib_attach),
72
73 /* Bus interface */
74
75 /* pcib interface */
76 DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
77 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
78
79 /* ofw_bus interface */
80 DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node),
81 DEVMETHOD(ofw_pci_setup_device, ofw_pcib_setup_device),
82
83 DEVMETHOD_END
84 };
85
86 static devclass_t pcib_devclass;
87
88 DEFINE_CLASS_1(pcib, ofw_pcib_driver, ofw_pcib_methods,
89 sizeof(struct ofw_pcib_gen_softc), pcib_driver);
90 EARLY_DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_driver, pcib_devclass, NULL, NULL,
91 BUS_PASS_BUS);
92 MODULE_DEPEND(ofw_pcib, pci, 1, 1, 1);
93
94 static int
ofw_pcib_probe(device_t dev)95 ofw_pcib_probe(device_t dev)
96 {
97 char desc[sizeof("OFW PCIe-PCIe bridge")];
98 const char *dtype, *pbdtype;
99
100 #define ISDTYPE(dtype, type) \
101 (((dtype) != NULL) && strcmp((dtype), (type)) == 0)
102
103 if ((pci_get_class(dev) == PCIC_BRIDGE) &&
104 (pci_get_subclass(dev) == PCIS_BRIDGE_PCI) &&
105 ofw_bus_get_node(dev) != 0) {
106 dtype = ofw_bus_get_type(dev);
107 pbdtype = ofw_bus_get_type(device_get_parent(
108 device_get_parent(dev)));
109 snprintf(desc, sizeof(desc), "OFW PCI%s-PCI%s bridge",
110 ISDTYPE(pbdtype, OFW_TYPE_PCIE) ? "e" : "",
111 ISDTYPE(dtype, OFW_TYPE_PCIE) ? "e" : "");
112 device_set_desc_copy(dev, desc);
113 return (BUS_PROBE_DEFAULT);
114 }
115
116 #undef ISDTYPE
117
118 return (ENXIO);
119 }
120
121 static int
ofw_pcib_attach(device_t dev)122 ofw_pcib_attach(device_t dev)
123 {
124 struct ofw_pcib_gen_softc *sc;
125
126 sc = device_get_softc(dev);
127
128 switch (pci_get_devid(dev)) {
129 /*
130 * The ALi M5249 found in Fire-based machines by definition must me
131 * subtractive as they have a ISA bridge on their secondary side but
132 * don't indicate this in the class code although the ISA I/O range
133 * isn't included in their bridge decode.
134 */
135 case PCI_DEVID_ALI_M5249:
136 sc->ops_pcib_sc.flags |= PCIB_SUBTRACTIVE;
137 break;
138 }
139
140 switch (pci_get_vendor(dev)) {
141 /*
142 * Concurrently write the primary and secondary bus numbers in order
143 * to work around a bug in PLX PEX 8114 causing the internal shadow
144 * copies of these not to be updated when setting them bytewise.
145 */
146 case PCI_VENDOR_PLX:
147 pci_write_config(dev, PCIR_PRIBUS_1,
148 pci_read_config(dev, PCIR_SECBUS_1, 1) << 8 |
149 pci_read_config(dev, PCIR_PRIBUS_1, 1), 2);
150 break;
151 }
152
153 ofw_pcib_gen_setup(dev);
154 pcib_attach_common(dev);
155 return (pcib_attach_child(dev));
156 }
157
158 static void
ofw_pcib_setup_device(device_t bus,device_t child)159 ofw_pcib_setup_device(device_t bus, device_t child)
160 {
161 int i;
162 uint16_t reg;
163
164 switch (pci_get_vendor(bus)) {
165 /*
166 * For PLX PEX 8532 issue 64 TLPs to the child from the downstream
167 * port to the child device in order to work around a hardware bug.
168 */
169 case PCI_VENDOR_PLX:
170 for (i = 0, reg = 0; i < 64; i++)
171 reg |= pci_get_devid(child);
172 break;
173 }
174
175 OFW_PCI_SETUP_DEVICE(device_get_parent(bus), child);
176 }
177