1 /*-
2 * Copyright (c) 2011 Nathan Whitehorn
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/10/sys/powerpc/pseries/vdevice.c 273675 2014-10-26 04:01:57Z ian $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
35 #include <sys/bus.h>
36 #include <sys/cpu.h>
37 #include <machine/bus.h>
38 #include <machine/intr_machdep.h>
39
40 #include <dev/ofw/openfirm.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43
44 #include <powerpc/pseries/plpar_iommu.h>
45
46 #include "iommu_if.h"
47
48 static int vdevice_probe(device_t);
49 static int vdevice_attach(device_t);
50 static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev,
51 device_t child);
52 static int vdevice_print_child(device_t dev, device_t child);
53 static struct resource_list *vdevice_get_resource_list(device_t, device_t);
54 static bus_dma_tag_t vdevice_get_dma_tag(device_t dev, device_t child);
55
56 /*
57 * VDevice devinfo
58 */
59 struct vdevice_devinfo {
60 struct ofw_bus_devinfo mdi_obdinfo;
61 struct resource_list mdi_resources;
62 bus_dma_tag_t mdi_dma_tag;
63 };
64
65 static device_method_t vdevice_methods[] = {
66 /* Device interface */
67 DEVMETHOD(device_probe, vdevice_probe),
68 DEVMETHOD(device_attach, vdevice_attach),
69
70 /* Bus interface */
71 DEVMETHOD(bus_add_child, bus_generic_add_child),
72 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
73 DEVMETHOD(bus_print_child, vdevice_print_child),
74 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
75 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
76 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
77 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
78 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
79 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
80 DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list),
81
82 /* ofw_bus interface */
83 DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo),
84 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
85 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
86 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
87 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
88 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
89
90 /* IOMMU interface */
91 DEVMETHOD(bus_get_dma_tag, vdevice_get_dma_tag),
92 DEVMETHOD(iommu_map, phyp_iommu_map),
93 DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
94
95 DEVMETHOD_END
96 };
97
98 static driver_t vdevice_driver = {
99 "vdevice",
100 vdevice_methods,
101 0
102 };
103
104 static devclass_t vdevice_devclass;
105
106 DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, vdevice_devclass, 0, 0);
107
108 static int
vdevice_probe(device_t dev)109 vdevice_probe(device_t dev)
110 {
111 const char *name;
112
113 name = ofw_bus_get_name(dev);
114
115 if (name == NULL || strcmp(name, "vdevice") != 0)
116 return (ENXIO);
117
118 if (!ofw_bus_is_compatible(dev, "IBM,vdevice"))
119 return (ENXIO);
120
121 device_set_desc(dev, "POWER Hypervisor Virtual Device Root");
122
123 return (0);
124 }
125
126 static int
vdevice_attach(device_t dev)127 vdevice_attach(device_t dev)
128 {
129 phandle_t root, child;
130 device_t cdev;
131 struct vdevice_devinfo *dinfo;
132
133 root = ofw_bus_get_node(dev);
134
135 for (child = OF_child(root); child != 0; child = OF_peer(child)) {
136 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
137
138 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo,
139 child) != 0) {
140 free(dinfo, M_DEVBUF);
141 continue;
142 }
143 resource_list_init(&dinfo->mdi_resources);
144
145 ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources);
146
147 cdev = device_add_child(dev, NULL, -1);
148 if (cdev == NULL) {
149 device_printf(dev, "<%s>: device_add_child failed\n",
150 dinfo->mdi_obdinfo.obd_name);
151 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
152 free(dinfo, M_DEVBUF);
153 continue;
154 }
155 device_set_ivars(cdev, dinfo);
156 }
157
158 return (bus_generic_attach(dev));
159 }
160
161 static const struct ofw_bus_devinfo *
vdevice_get_devinfo(device_t dev,device_t child)162 vdevice_get_devinfo(device_t dev, device_t child)
163 {
164 return (device_get_ivars(child));
165 }
166
167 static int
vdevice_print_child(device_t dev,device_t child)168 vdevice_print_child(device_t dev, device_t child)
169 {
170 struct vdevice_devinfo *dinfo;
171 struct resource_list *rl;
172 int retval = 0;
173
174 dinfo = device_get_ivars(child);
175 rl = &dinfo->mdi_resources;
176
177 retval += bus_print_child_header(dev, child);
178
179 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
180
181 retval += bus_print_child_footer(dev, child);
182
183 return (retval);
184 }
185
186 static struct resource_list *
vdevice_get_resource_list(device_t dev,device_t child)187 vdevice_get_resource_list (device_t dev, device_t child)
188 {
189 struct vdevice_devinfo *dinfo;
190
191 dinfo = device_get_ivars(child);
192 return (&dinfo->mdi_resources);
193 }
194
195 static bus_dma_tag_t
vdevice_get_dma_tag(device_t dev,device_t child)196 vdevice_get_dma_tag(device_t dev, device_t child)
197 {
198 struct vdevice_devinfo *dinfo;
199 while (child != NULL && device_get_parent(child) != dev)
200 child = device_get_parent(child);
201 dinfo = device_get_ivars(child);
202
203 if (dinfo->mdi_dma_tag == NULL) {
204 bus_dma_tag_create(bus_get_dma_tag(dev),
205 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
206 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
207 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag);
208 phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag);
209 }
210
211 return (dinfo->mdi_dma_tag);
212 }
213
214