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 #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, ofw_bus_gen_child_pnpinfo), 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 DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, 0, 0); 105 106 static int 107 vdevice_probe(device_t dev) 108 { 109 const char *name; 110 111 name = ofw_bus_get_name(dev); 112 113 if (name == NULL || strcmp(name, "vdevice") != 0) 114 return (ENXIO); 115 116 if (!ofw_bus_is_compatible(dev, "IBM,vdevice")) 117 return (ENXIO); 118 119 device_set_desc(dev, "POWER Hypervisor Virtual Device Root"); 120 121 return (0); 122 } 123 124 static int 125 vdevice_attach(device_t dev) 126 { 127 phandle_t root, child; 128 device_t cdev; 129 struct vdevice_devinfo *dinfo; 130 131 root = ofw_bus_get_node(dev); 132 133 /* The XICP (root PIC) will handle all our interrupts */ 134 powerpc_register_pic(root_pic, OF_xref_from_node(root), 135 1 << 24 /* 24-bit XIRR field */, 1 /* Number of IPIs */, FALSE); 136 137 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 138 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 139 140 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, 141 child) != 0) { 142 free(dinfo, M_DEVBUF); 143 continue; 144 } 145 resource_list_init(&dinfo->mdi_resources); 146 147 ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources, NULL); 148 149 cdev = device_add_child(dev, NULL, -1); 150 if (cdev == NULL) { 151 device_printf(dev, "<%s>: device_add_child failed\n", 152 dinfo->mdi_obdinfo.obd_name); 153 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo); 154 free(dinfo, M_DEVBUF); 155 continue; 156 } 157 device_set_ivars(cdev, dinfo); 158 } 159 160 return (bus_generic_attach(dev)); 161 } 162 163 static const struct ofw_bus_devinfo * 164 vdevice_get_devinfo(device_t dev, device_t child) 165 { 166 return (device_get_ivars(child)); 167 } 168 169 static int 170 vdevice_print_child(device_t dev, device_t child) 171 { 172 struct vdevice_devinfo *dinfo; 173 struct resource_list *rl; 174 int retval = 0; 175 176 dinfo = device_get_ivars(child); 177 rl = &dinfo->mdi_resources; 178 179 retval += bus_print_child_header(dev, child); 180 181 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 182 183 retval += bus_print_child_footer(dev, child); 184 185 return (retval); 186 } 187 188 static struct resource_list * 189 vdevice_get_resource_list (device_t dev, device_t child) 190 { 191 struct vdevice_devinfo *dinfo; 192 193 dinfo = device_get_ivars(child); 194 return (&dinfo->mdi_resources); 195 } 196 197 static bus_dma_tag_t 198 vdevice_get_dma_tag(device_t dev, device_t child) 199 { 200 struct vdevice_devinfo *dinfo; 201 while (child != NULL && device_get_parent(child) != dev) 202 child = device_get_parent(child); 203 dinfo = device_get_ivars(child); 204 205 if (dinfo->mdi_dma_tag == NULL) { 206 bus_dma_tag_create(bus_get_dma_tag(dev), 207 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 208 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED, 209 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag); 210 phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag); 211 } 212 213 return (dinfo->mdi_dma_tag); 214 } 215