1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2011 Nathan Whitehorn
5 * All rights reserved.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/malloc.h>
37 #include <sys/bus.h>
38 #include <sys/cpu.h>
39 #include <machine/bus.h>
40 #include <machine/intr_machdep.h>
41
42 #include <dev/ofw/openfirm.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45
46 #include <powerpc/pseries/plpar_iommu.h>
47
48 #include "iommu_if.h"
49
50 static int vdevice_probe(device_t);
51 static int vdevice_attach(device_t);
52 static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev,
53 device_t child);
54 static int vdevice_print_child(device_t dev, device_t child);
55 static struct resource_list *vdevice_get_resource_list(device_t, device_t);
56 static bus_dma_tag_t vdevice_get_dma_tag(device_t dev, device_t child);
57
58 /*
59 * VDevice devinfo
60 */
61 struct vdevice_devinfo {
62 struct ofw_bus_devinfo mdi_obdinfo;
63 struct resource_list mdi_resources;
64 bus_dma_tag_t mdi_dma_tag;
65 };
66
67 static device_method_t vdevice_methods[] = {
68 /* Device interface */
69 DEVMETHOD(device_probe, vdevice_probe),
70 DEVMETHOD(device_attach, vdevice_attach),
71
72 /* Bus interface */
73 DEVMETHOD(bus_add_child, bus_generic_add_child),
74 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
75 DEVMETHOD(bus_print_child, vdevice_print_child),
76 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
77 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
78 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
79 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
80 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
81 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
82 DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list),
83
84 /* ofw_bus interface */
85 DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo),
86 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
87 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
88 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
89 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
90 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
91
92 /* IOMMU interface */
93 DEVMETHOD(bus_get_dma_tag, vdevice_get_dma_tag),
94 DEVMETHOD(iommu_map, phyp_iommu_map),
95 DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
96
97 DEVMETHOD_END
98 };
99
100 static driver_t vdevice_driver = {
101 "vdevice",
102 vdevice_methods,
103 0
104 };
105
106 static devclass_t vdevice_devclass;
107
108 DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, vdevice_devclass, 0, 0);
109
110 static int
vdevice_probe(device_t dev)111 vdevice_probe(device_t dev)
112 {
113 const char *name;
114
115 name = ofw_bus_get_name(dev);
116
117 if (name == NULL || strcmp(name, "vdevice") != 0)
118 return (ENXIO);
119
120 if (!ofw_bus_is_compatible(dev, "IBM,vdevice"))
121 return (ENXIO);
122
123 device_set_desc(dev, "POWER Hypervisor Virtual Device Root");
124
125 return (0);
126 }
127
128 static int
vdevice_attach(device_t dev)129 vdevice_attach(device_t dev)
130 {
131 phandle_t root, child;
132 device_t cdev;
133 struct vdevice_devinfo *dinfo;
134
135 root = ofw_bus_get_node(dev);
136
137 /* The XICP (root PIC) will handle all our interrupts */
138 powerpc_register_pic(root_pic, OF_xref_from_node(root),
139 1 << 24 /* 24-bit XIRR field */, 1 /* Number of IPIs */, FALSE);
140
141 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
142 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
143
144 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo,
145 child) != 0) {
146 free(dinfo, M_DEVBUF);
147 continue;
148 }
149 resource_list_init(&dinfo->mdi_resources);
150
151 ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources, NULL);
152
153 cdev = device_add_child(dev, NULL, -1);
154 if (cdev == NULL) {
155 device_printf(dev, "<%s>: device_add_child failed\n",
156 dinfo->mdi_obdinfo.obd_name);
157 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
158 free(dinfo, M_DEVBUF);
159 continue;
160 }
161 device_set_ivars(cdev, dinfo);
162 }
163
164 return (bus_generic_attach(dev));
165 }
166
167 static const struct ofw_bus_devinfo *
vdevice_get_devinfo(device_t dev,device_t child)168 vdevice_get_devinfo(device_t dev, device_t child)
169 {
170 return (device_get_ivars(child));
171 }
172
173 static int
vdevice_print_child(device_t dev,device_t child)174 vdevice_print_child(device_t dev, device_t child)
175 {
176 struct vdevice_devinfo *dinfo;
177 struct resource_list *rl;
178 int retval = 0;
179
180 dinfo = device_get_ivars(child);
181 rl = &dinfo->mdi_resources;
182
183 retval += bus_print_child_header(dev, child);
184
185 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
186
187 retval += bus_print_child_footer(dev, child);
188
189 return (retval);
190 }
191
192 static struct resource_list *
vdevice_get_resource_list(device_t dev,device_t child)193 vdevice_get_resource_list (device_t dev, device_t child)
194 {
195 struct vdevice_devinfo *dinfo;
196
197 dinfo = device_get_ivars(child);
198 return (&dinfo->mdi_resources);
199 }
200
201 static bus_dma_tag_t
vdevice_get_dma_tag(device_t dev,device_t child)202 vdevice_get_dma_tag(device_t dev, device_t child)
203 {
204 struct vdevice_devinfo *dinfo;
205 while (child != NULL && device_get_parent(child) != dev)
206 child = device_get_parent(child);
207 dinfo = device_get_ivars(child);
208
209 if (dinfo->mdi_dma_tag == NULL) {
210 bus_dma_tag_create(bus_get_dma_tag(dev),
211 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
212 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
213 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag);
214 phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag);
215 }
216
217 return (dinfo->mdi_dma_tag);
218 }
219