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 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/types.h>
35 #include <sys/sysctl.h>
36 #include <sys/kernel.h>
37 #include <sys/rman.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/endian.h>
41 #include <sys/cpuset.h>
42
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
46
47 #include <dev/pci/pcireg.h>
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pci_host_generic.h>
50 #include <dev/pci/pci_host_generic_fdt.h>
51 #include <dev/pci/pcib_private.h>
52
53 #include "thunder_pcie_common.h"
54
55 #include "pcib_if.h"
56
57 #ifdef THUNDERX_PASS_1_1_ERRATA
58 static struct resource * thunder_pcie_fdt_alloc_resource(device_t, device_t,
59 int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
60 #endif
61 static int thunder_pcie_fdt_attach(device_t);
62 static int thunder_pcie_fdt_probe(device_t);
63 static int thunder_pcie_fdt_get_id(device_t, device_t, enum pci_id_type,
64 uintptr_t *);
65
66 static device_method_t thunder_pcie_fdt_methods[] = {
67 /* Device interface */
68 DEVMETHOD(device_probe, thunder_pcie_fdt_probe),
69 DEVMETHOD(device_attach, thunder_pcie_fdt_attach),
70 #ifdef THUNDERX_PASS_1_1_ERRATA
71 DEVMETHOD(bus_alloc_resource, thunder_pcie_fdt_alloc_resource),
72 #endif
73
74 /* pcib interface */
75 DEVMETHOD(pcib_get_id, thunder_pcie_fdt_get_id),
76
77 /* End */
78 DEVMETHOD_END
79 };
80
81 DEFINE_CLASS_1(pcib, thunder_pcie_fdt_driver, thunder_pcie_fdt_methods,
82 sizeof(struct generic_pcie_fdt_softc), generic_pcie_fdt_driver);
83
84 static devclass_t thunder_pcie_fdt_devclass;
85
86 DRIVER_MODULE(thunder_pcib, simplebus, thunder_pcie_fdt_driver,
87 thunder_pcie_fdt_devclass, 0, 0);
88 DRIVER_MODULE(thunder_pcib, ofwbus, thunder_pcie_fdt_driver,
89 thunder_pcie_fdt_devclass, 0, 0);
90
91 static int
thunder_pcie_fdt_probe(device_t dev)92 thunder_pcie_fdt_probe(device_t dev)
93 {
94
95 /* Check if we're running on Cavium ThunderX */
96 if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
97 CPU_IMPL_CAVIUM, CPU_PART_THUNDERX, 0, 0))
98 return (ENXIO);
99
100 if (!ofw_bus_status_okay(dev))
101 return (ENXIO);
102
103 if (ofw_bus_is_compatible(dev, "pci-host-ecam-generic") ||
104 ofw_bus_is_compatible(dev, "cavium,thunder-pcie") ||
105 ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-ecam")) {
106 device_set_desc(dev, "Cavium Integrated PCI/PCI-E Controller");
107 return (BUS_PROBE_DEFAULT);
108 }
109
110 return (ENXIO);
111 }
112
113 static int
thunder_pcie_fdt_attach(device_t dev)114 thunder_pcie_fdt_attach(device_t dev)
115 {
116 struct generic_pcie_fdt_softc *sc;
117
118 sc = device_get_softc(dev);
119 thunder_pcie_identify_ecam(dev, &sc->base.ecam);
120 sc->base.coherent = 1;
121
122 return (pci_host_generic_attach(dev));
123 }
124
125 static int
thunder_pcie_fdt_get_id(device_t pci,device_t child,enum pci_id_type type,uintptr_t * id)126 thunder_pcie_fdt_get_id(device_t pci, device_t child, enum pci_id_type type,
127 uintptr_t *id)
128 {
129 phandle_t node;
130 int bsf;
131
132 if (type != PCI_ID_MSI)
133 return (pcib_get_id(pci, child, type, id));
134
135 node = ofw_bus_get_node(pci);
136 if (OF_hasprop(node, "msi-map"))
137 return (generic_pcie_get_id(pci, child, type, id));
138
139 bsf = pci_get_rid(child);
140 *id = (pci_get_domain(child) << PCI_RID_DOMAIN_SHIFT) | bsf;
141
142 return (0);
143 }
144
145 #ifdef THUNDERX_PASS_1_1_ERRATA
146 static struct resource *
thunder_pcie_fdt_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)147 thunder_pcie_fdt_alloc_resource(device_t dev, device_t child, int type, int *rid,
148 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
149 {
150
151 if ((int)ofw_bus_get_node(child) > 0)
152 return (pci_host_generic_alloc_resource(dev, child,
153 type, rid, start, end, count, flags));
154
155 return (thunder_pcie_alloc_resource(dev, child,
156 type, rid, start, end, count, flags));
157 }
158 #endif
159