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