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