1/*- 2 * Copyright (c) 2011 NetApp, Inc. 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 NETAPP, INC ``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 NETAPP, INC 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 * $FreeBSD$ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/param.h> 33#include <sys/types.h> 34#include <sys/systm.h> 35#include <sys/bus.h> 36 37#include <dev/pci/pcivar.h> 38#include <dev/pci/pcireg.h> 39 40#include <machine/md_var.h> 41 42#include "vmm_util.h" 43#include "vmm_mem.h" 44#include "iommu.h" 45 46static boolean_t iommu_avail; 47static struct iommu_ops *ops; 48static void *host_domain; 49 50static __inline int 51IOMMU_INIT(void) 52{ 53 if (ops != NULL) 54 return ((*ops->init)()); 55 else 56 return (ENXIO); 57} 58 59static __inline void 60IOMMU_CLEANUP(void) 61{ 62 if (ops != NULL && iommu_avail) 63 (*ops->cleanup)(); 64} 65 66static __inline void * 67IOMMU_CREATE_DOMAIN(vm_paddr_t maxaddr) 68{ 69 70 if (ops != NULL && iommu_avail) 71 return ((*ops->create_domain)(maxaddr)); 72 else 73 return (NULL); 74} 75 76static __inline void 77IOMMU_DESTROY_DOMAIN(void *dom) 78{ 79 80 if (ops != NULL && iommu_avail) 81 (*ops->destroy_domain)(dom); 82} 83 84static __inline uint64_t 85IOMMU_CREATE_MAPPING(void *domain, vm_paddr_t gpa, vm_paddr_t hpa, uint64_t len) 86{ 87 88 if (ops != NULL && iommu_avail) 89 return ((*ops->create_mapping)(domain, gpa, hpa, len)); 90 else 91 return (len); /* XXX */ 92} 93 94static __inline uint64_t 95IOMMU_REMOVE_MAPPING(void *domain, vm_paddr_t gpa, uint64_t len) 96{ 97 98 if (ops != NULL && iommu_avail) 99 return ((*ops->remove_mapping)(domain, gpa, len)); 100 else 101 return (len); /* XXX */ 102} 103 104static __inline void 105IOMMU_ADD_DEVICE(void *domain, int bus, int slot, int func) 106{ 107 108 if (ops != NULL && iommu_avail) 109 (*ops->add_device)(domain, bus, slot, func); 110} 111 112static __inline void 113IOMMU_REMOVE_DEVICE(void *domain, int bus, int slot, int func) 114{ 115 116 if (ops != NULL && iommu_avail) 117 (*ops->remove_device)(domain, bus, slot, func); 118} 119 120static __inline void 121IOMMU_INVALIDATE_TLB(void *domain) 122{ 123 124 if (ops != NULL && iommu_avail) 125 (*ops->invalidate_tlb)(domain); 126} 127 128static __inline void 129IOMMU_ENABLE(void) 130{ 131 132 if (ops != NULL && iommu_avail) 133 (*ops->enable)(); 134} 135 136static __inline void 137IOMMU_DISABLE(void) 138{ 139 140 if (ops != NULL && iommu_avail) 141 (*ops->disable)(); 142} 143 144void 145iommu_init(void) 146{ 147 int error, bus, slot, func; 148 vm_paddr_t maxaddr; 149 const char *name; 150 device_t dev; 151 152 if (vmm_is_intel()) 153 ops = &iommu_ops_intel; 154 else if (vmm_is_amd()) 155 ops = &iommu_ops_amd; 156 else 157 ops = NULL; 158 159 error = IOMMU_INIT(); 160 if (error) 161 return; 162 163 iommu_avail = TRUE; 164 165 /* 166 * Create a domain for the devices owned by the host 167 */ 168 maxaddr = vmm_mem_maxaddr(); 169 host_domain = IOMMU_CREATE_DOMAIN(maxaddr); 170 if (host_domain == NULL) 171 panic("iommu_init: unable to create a host domain"); 172 173 /* 174 * Create 1:1 mappings from '0' to 'maxaddr' for devices assigned to 175 * the host 176 */ 177 iommu_create_mapping(host_domain, 0, 0, maxaddr); 178 179 for (bus = 0; bus <= PCI_BUSMAX; bus++) { 180 for (slot = 0; slot <= PCI_SLOTMAX; slot++) { 181 for (func = 0; func <= PCI_FUNCMAX; func++) { 182 dev = pci_find_dbsf(0, bus, slot, func); 183 if (dev == NULL) 184 continue; 185 186 /* skip passthrough devices */ 187 name = device_get_name(dev); 188 if (name != NULL && strcmp(name, "ppt") == 0) 189 continue; 190 191 /* everything else belongs to the host domain */ 192 iommu_add_device(host_domain, bus, slot, func); 193 } 194 } 195 } 196 IOMMU_ENABLE(); 197 198} 199 200void 201iommu_cleanup(void) 202{ 203 IOMMU_DISABLE(); 204 IOMMU_DESTROY_DOMAIN(host_domain); 205 IOMMU_CLEANUP(); 206} 207 208void * 209iommu_create_domain(vm_paddr_t maxaddr) 210{ 211 212 return (IOMMU_CREATE_DOMAIN(maxaddr)); 213} 214 215void 216iommu_destroy_domain(void *dom) 217{ 218 219 IOMMU_DESTROY_DOMAIN(dom); 220} 221 222void 223iommu_create_mapping(void *dom, vm_paddr_t gpa, vm_paddr_t hpa, size_t len) 224{ 225 uint64_t mapped, remaining; 226 227 remaining = len; 228 229 while (remaining > 0) { 230 mapped = IOMMU_CREATE_MAPPING(dom, gpa, hpa, remaining); 231 gpa += mapped; 232 hpa += mapped; 233 remaining -= mapped; 234 } 235} 236 237void 238iommu_remove_mapping(void *dom, vm_paddr_t gpa, size_t len) 239{ 240 uint64_t unmapped, remaining; 241 242 remaining = len; 243 244 while (remaining > 0) { 245 unmapped = IOMMU_REMOVE_MAPPING(dom, gpa, remaining); 246 gpa += unmapped; 247 remaining -= unmapped; 248 } 249} 250 251void * 252iommu_host_domain(void) 253{ 254 255 return (host_domain); 256} 257 258void 259iommu_add_device(void *dom, int bus, int slot, int func) 260{ 261 262 IOMMU_ADD_DEVICE(dom, bus, slot, func); 263} 264 265void 266iommu_remove_device(void *dom, int bus, int slot, int func) 267{ 268 269 IOMMU_REMOVE_DEVICE(dom, bus, slot, func); 270} 271 272void 273iommu_invalidate_tlb(void *domain) 274{ 275 276 IOMMU_INVALIDATE_TLB(domain); 277} 278