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/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, ofw_bus_gen_child_pnpinfo), 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 DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, 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 /* The XICP (root PIC) will handle all our interrupts */ 136 powerpc_register_pic(root_pic, OF_xref_from_node(root), 137 1 << 24 /* 24-bit XIRR field */, 1 /* Number of IPIs */, FALSE); 138 139 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 140 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 141 142 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, 143 child) != 0) { 144 free(dinfo, M_DEVBUF); 145 continue; 146 } 147 resource_list_init(&dinfo->mdi_resources); 148 149 ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources, NULL); 150 151 cdev = device_add_child(dev, NULL, -1); 152 if (cdev == NULL) { 153 device_printf(dev, "<%s>: device_add_child failed\n", 154 dinfo->mdi_obdinfo.obd_name); 155 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo); 156 free(dinfo, M_DEVBUF); 157 continue; 158 } 159 device_set_ivars(cdev, dinfo); 160 } 161 162 return (bus_generic_attach(dev)); 163 } 164 165 static const struct ofw_bus_devinfo * 166 vdevice_get_devinfo(device_t dev, device_t child) 167 { 168 return (device_get_ivars(child)); 169 } 170 171 static int 172 vdevice_print_child(device_t dev, device_t child) 173 { 174 struct vdevice_devinfo *dinfo; 175 struct resource_list *rl; 176 int retval = 0; 177 178 dinfo = device_get_ivars(child); 179 rl = &dinfo->mdi_resources; 180 181 retval += bus_print_child_header(dev, child); 182 183 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 184 185 retval += bus_print_child_footer(dev, child); 186 187 return (retval); 188 } 189 190 static struct resource_list * 191 vdevice_get_resource_list (device_t dev, device_t child) 192 { 193 struct vdevice_devinfo *dinfo; 194 195 dinfo = device_get_ivars(child); 196 return (&dinfo->mdi_resources); 197 } 198 199 static bus_dma_tag_t 200 vdevice_get_dma_tag(device_t dev, device_t child) 201 { 202 struct vdevice_devinfo *dinfo; 203 while (child != NULL && device_get_parent(child) != dev) 204 child = device_get_parent(child); 205 dinfo = device_get_ivars(child); 206 207 if (dinfo->mdi_dma_tag == NULL) { 208 bus_dma_tag_create(bus_get_dma_tag(dev), 209 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 210 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED, 211 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag); 212 phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag); 213 } 214 215 return (dinfo->mdi_dma_tag); 216 } 217