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 <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/12.0/sys/arm64/cavium/thunder_pcie_pem_fdt.c 315421 2017-03-16 17:49:37Z andrew $");
30
31 #include "opt_platform.h"
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/pcivar.h>
50 #include <dev/pci/pcireg.h>
51 #include <dev/pci/pcib_private.h>
52 #include <dev/pci/pci_host_generic.h>
53
54 #include <machine/intr.h>
55
56 #include "thunder_pcie_common.h"
57 #include "thunder_pcie_pem.h"
58
59 #include "pcib_if.h"
60
61 static int thunder_pem_fdt_probe(device_t);
62 static int thunder_pem_fdt_alloc_msix(device_t, device_t, int *);
63 static int thunder_pem_fdt_release_msix(device_t, device_t, int);
64 static int thunder_pem_fdt_alloc_msi(device_t, device_t, int, int, int *);
65 static int thunder_pem_fdt_release_msi(device_t, device_t, int, int *);
66 static int thunder_pem_fdt_map_msi(device_t, device_t, int, uint64_t *,
67 uint32_t *);
68 static int thunder_pem_fdt_get_id(device_t, device_t, enum pci_id_type,
69 uintptr_t *);
70
71 static device_method_t thunder_pem_fdt_methods[] = {
72 /* Device interface */
73 DEVMETHOD(device_probe, thunder_pem_fdt_probe),
74
75 /* pcib interface */
76 DEVMETHOD(pcib_alloc_msix, thunder_pem_fdt_alloc_msix),
77 DEVMETHOD(pcib_release_msix, thunder_pem_fdt_release_msix),
78 DEVMETHOD(pcib_alloc_msi, thunder_pem_fdt_alloc_msi),
79 DEVMETHOD(pcib_release_msi, thunder_pem_fdt_release_msi),
80 DEVMETHOD(pcib_map_msi, thunder_pem_fdt_map_msi),
81 DEVMETHOD(pcib_get_id, thunder_pem_fdt_get_id),
82
83 /* End */
84 DEVMETHOD_END
85 };
86
87 DEFINE_CLASS_1(pcib, thunder_pem_fdt_driver, thunder_pem_fdt_methods,
88 sizeof(struct thunder_pem_softc), thunder_pem_driver);
89
90 static devclass_t thunder_pem_fdt_devclass;
91
92 DRIVER_MODULE(thunder_pem, simplebus, thunder_pem_fdt_driver,
93 thunder_pem_fdt_devclass, 0, 0);
94 DRIVER_MODULE(thunder_pem, ofwbus, thunder_pem_fdt_driver,
95 thunder_pem_fdt_devclass, 0, 0);
96
97 static int
98 thunder_pem_fdt_probe(device_t dev)
99 {
100
101 if (!ofw_bus_status_okay(dev))
102 return (ENXIO);
103
104 if (ofw_bus_is_compatible(dev, "cavium,pci-host-thunder-pem")) {
105 device_set_desc(dev, THUNDER_PEM_DESC);
106 return (BUS_PROBE_DEFAULT);
107 }
108
109 return (ENXIO);
110 }
111
112 static int
113 thunder_pem_fdt_alloc_msi(device_t pci, device_t child, int count, int maxcount,
114 int *irqs)
115 {
116 phandle_t msi_parent;
117 int err;
118
119 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
120 &msi_parent, NULL);
121 if (err != 0)
122 return (err);
123 return (intr_alloc_msi(pci, child, msi_parent, count, maxcount,
124 irqs));
125 }
126
127 static int
128 thunder_pem_fdt_release_msi(device_t pci, device_t child, int count, int *irqs)
129 {
130 phandle_t msi_parent;
131 int err;
132
133 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
134 &msi_parent, NULL);
135 if (err != 0)
136 return (err);
137 return (intr_release_msi(pci, child, msi_parent, count, irqs));
138 }
139
140 static int
141 thunder_pem_fdt_alloc_msix(device_t pci, device_t child, int *irq)
142 {
143 phandle_t msi_parent;
144 int err;
145
146 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
147 &msi_parent, NULL);
148 if (err != 0)
149 return (err);
150 return (intr_alloc_msix(pci, child, msi_parent, irq));
151 }
152
153 static int
154 thunder_pem_fdt_release_msix(device_t pci, device_t child, int irq)
155 {
156 phandle_t msi_parent;
157 int err;
158
159 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
160 &msi_parent, NULL);
161 if (err != 0)
162 return (err);
163 return (intr_release_msix(pci, child, msi_parent, irq));
164 }
165
166 static int
167 thunder_pem_fdt_map_msi(device_t pci, device_t child, int irq, uint64_t *addr,
168 uint32_t *data)
169 {
170 phandle_t msi_parent;
171 int err;
172
173 err = ofw_bus_msimap(ofw_bus_get_node(pci), pci_get_rid(child),
174 &msi_parent, NULL);
175 if (err != 0)
176 return (err);
177 return (intr_map_msi(pci, child, msi_parent, irq, addr, data));
178 }
179
180 static int
181 thunder_pem_fdt_get_id(device_t dev, device_t child, enum pci_id_type type,
182 uintptr_t *id)
183 {
184 phandle_t node;
185 int err;
186 uint32_t rid;
187 uint16_t pci_rid;
188
189 if (type != PCI_ID_MSI)
190 return (pcib_get_id(dev, child, type, id));
191
192 node = ofw_bus_get_node(dev);
193 pci_rid = pci_get_rid(child);
194
195 err = ofw_bus_msimap(node, pci_rid, NULL, &rid);
196 if (err != 0)
197 return (err);
198 *id = rid;
199
200 return (0);
201 }
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