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 #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 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 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 * 162 vdevice_get_devinfo(device_t dev, device_t child) 163 { 164 return (device_get_ivars(child)); 165 } 166 167 static int 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 * 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 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