1 /*
2 * Copyright (C) 2016 Cavium Inc.
3 * All rights reserved.
4 *
5 * Developed by Semihalf.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 #include "opt_platform.h"
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/11.1/sys/arm64/cavium/thunder_pcie_fdt.c 301031 2016-05-31 09:15:21Z andrew $");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/types.h>
37 #include <sys/sysctl.h>
38 #include <sys/kernel.h>
39 #include <sys/rman.h>
40 #include <sys/module.h>
41 #include <sys/bus.h>
42 #include <sys/endian.h>
43 #include <sys/cpuset.h>
44
45 #include <dev/ofw/openfirm.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
48
49 #include <dev/pci/pcireg.h>
50 #include <dev/pci/pcivar.h>
51 #include <dev/pci/pci_host_generic.h>
52 #include <dev/pci/pcib_private.h>
53
54 #include "thunder_pcie_common.h"
55
56 #include "pcib_if.h"
57
58 #ifdef THUNDERX_PASS_1_1_ERRATA
59 static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
60 int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
61 #endif
62 static int thunder_pcie_fdt_attach(device_t);
63 static int thunder_pcie_fdt_probe(device_t);
64 static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
65 uintptr_t *);
66
67 static device_method_t thunder_pcie_fdt_methods[] = {
68 /* Device interface */
69 DEVMETHOD(device_probe, thunder_pcie_fdt_probe),
70 DEVMETHOD(device_attach, thunder_pcie_fdt_attach),
71 #ifdef THUNDERX_PASS_1_1_ERRATA
72 DEVMETHOD(bus_alloc_resource, thunder_pcie_fdt_alloc_resource),
73 #endif
74
75 /* pcib interface */
76 DEVMETHOD(pcib_get_id, thunder_pcie_fdt_get_id),
77
78 /* End */
79 DEVMETHOD_END
80 };
81
82 DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
83 sizeof(struct generic_pcie_softc), generic_pcie_driver);
84
85 static devclass_t thunder_pcie_fdt_devclass;
86
87 DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver,
88 thunder_pcie_fdt_devclass, 0, 0);
89 DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver,
90 thunder_pcie_fdt_devclass, 0, 0);
91
92
93 static int
94 thunder_pcie_fdt_probe(device_t dev)
95 {
96
97 /* Check if we're running on Cavium ThunderX */
98 if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
99 CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0))
100 return (ENXIO);
101
102 if (!ofw_bus_status_okay(dev))
103 return (ENXIO);
104
105 if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
106 ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
107 ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
108 device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
109 return (BUS_PROBE_DEFAULT);
110 }
111
112 return (ENXIO);
113 }
114
115 static int
116 thunder_pcie_fdt_attach(device_t dev)
117 {
118 struct generic_pcie_softc *sc;
119
120 sc = device_get_softc(dev);
121 thunder_pcie_identify_ecam(dev, &sc->ecam);
122 sc->coherent = 1;
123
124 return (pci_host_generic_attach(dev));
125 }
126
127 static int
128 thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
129 uintptr_t *id)
130 {
131 phandle_t node;
132 int bsf;
133
134 if (type != PCI_ID_MSI)
135 return (pcib_get_id(pci, child, type, id));
136
137 node = ofw_bus_get_node(pci);
138 if (OF_hasprop(node, "msi-map"))
139 return (generic_pcie_get_id(pci, child, type, id));
140
141 bsf = pci_get_rid(child);
142 *id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
143
144 return (0);
145 }
146
147 #ifdef THUNDERX_PASS_1_1_ERRATA
148 static struct resource *
149 thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type, int *rid,
150 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
151 {
152
153 if ((int)ofw_bus_get_node(child) > 0)
154 return (pci_host_generic_alloc_resource(dev, child,
155 type, rid, start, end, count, flags));
156
157 return (thunder_pcie_alloc_resource(dev, child,
158 type, rid, start, end, count, flags));
159 }
160 #endif
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