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 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 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 * 168 vdevice_get_devinfo(device_t dev, device_t child) 169 { 170 return (device_get_ivars(child)); 171 } 172 173 static int 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 * 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 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