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("$FreeBSD$"); 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 static int vdevice_probe(device_t); 45 static int vdevice_attach(device_t); 46 static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev, 47 device_t child); 48 static int vdevice_print_child(device_t dev, device_t child); 49 static struct resource_list *vdevice_get_resource_list (device_t, device_t); 50 51 /* 52 * VDevice devinfo 53 */ 54 struct vdevice_devinfo { 55 struct ofw_bus_devinfo mdi_obdinfo; 56 struct resource_list mdi_resources; 57 }; 58 59 static device_method_t vdevice_methods[] = { 60 /* Device interface */ 61 DEVMETHOD(device_probe, vdevice_probe), 62 DEVMETHOD(device_attach, vdevice_attach), 63 64 /* Bus interface */ 65 DEVMETHOD(bus_add_child, bus_generic_add_child), 66 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 67 DEVMETHOD(bus_print_child, vdevice_print_child), 68 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 69 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 70 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 71 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 72 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 73 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 74 DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list), 75 76 /* ofw_bus interface */ 77 DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo), 78 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 79 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 80 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 81 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 82 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 83 84 DEVMETHOD_END 85 }; 86 87 static driver_t vdevice_driver = { 88 "vdevice", 89 vdevice_methods, 90 0 91 }; 92 93 static devclass_t vdevice_devclass; 94 95 DRIVER_MODULE(vdevice, nexus, vdevice_driver, vdevice_devclass, 0, 0); 96 97 static int 98 vdevice_probe(device_t dev) 99 { 100 const char *name; 101 102 name = ofw_bus_get_name(dev); 103 104 if (name == NULL || strcmp(name, "vdevice") != 0) 105 return (ENXIO); 106 107 if (!ofw_bus_is_compatible(dev, "IBM,vdevice")) 108 return (ENXIO); 109 110 device_set_desc(dev, "POWER Hypervisor Virtual Device Root"); 111 112 return (0); 113 } 114 115 static int 116 vdevice_attach(device_t dev) 117 { 118 phandle_t root, child; 119 device_t cdev; 120 int icells, i, nintr, *intr; 121 phandle_t iparent; 122 struct vdevice_devinfo *dinfo; 123 124 root = ofw_bus_get_node(dev); 125 126 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 127 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 128 129 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, 130 child) != 0) { 131 free(dinfo, M_DEVBUF); 132 continue; 133 } 134 resource_list_init(&dinfo->mdi_resources); 135 136 if (OF_searchprop(child, "#interrupt-cells", &icells, 137 sizeof(icells)) <= 0) 138 icells = 2; 139 if (OF_getprop(child, "interrupt-parent", &iparent, 140 sizeof(iparent)) <= 0) 141 iparent = -1; 142 nintr = OF_getprop_alloc(child, "interrupts", sizeof(*intr), 143 (void **)&intr); 144 if (nintr > 0) { 145 for (i = 0; i < nintr; i += icells) { 146 u_int irq = intr[i]; 147 if (iparent != -1) 148 irq = MAP_IRQ(iparent, intr[i]); 149 150 resource_list_add(&dinfo->mdi_resources, 151 SYS_RES_IRQ, i, irq, irq, i); 152 } 153 } 154 155 cdev = device_add_child(dev, NULL, -1); 156 if (cdev == NULL) { 157 device_printf(dev, "<%s>: device_add_child failed\n", 158 dinfo->mdi_obdinfo.obd_name); 159 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo); 160 free(dinfo, M_DEVBUF); 161 continue; 162 } 163 device_set_ivars(cdev, dinfo); 164 } 165 166 return (bus_generic_attach(dev)); 167 } 168 169 static const struct ofw_bus_devinfo * 170 vdevice_get_devinfo(device_t dev, device_t child) 171 { 172 return (device_get_ivars(child)); 173 } 174 175 static int 176 vdevice_print_child(device_t dev, device_t child) 177 { 178 struct vdevice_devinfo *dinfo; 179 struct resource_list *rl; 180 int retval = 0; 181 182 dinfo = device_get_ivars(child); 183 rl = &dinfo->mdi_resources; 184 185 retval += bus_print_child_header(dev, child); 186 187 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 188 189 retval += bus_print_child_footer(dev, child); 190 191 return (retval); 192 } 193 194 static struct resource_list * 195 vdevice_get_resource_list (device_t dev, device_t child) 196 { 197 struct vdevice_devinfo *dinfo; 198 199 dinfo = device_get_ivars(child); 200 return (&dinfo->mdi_resources); 201 } 202 203