1 /* 2 * QEMU sPAPR IOMMU (TCE) code 3 * 4 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include "hw/hw.h" 20 #include "sysemu/kvm.h" 21 #include "hw/qdev.h" 22 #include "kvm_ppc.h" 23 #include "sysemu/dma.h" 24 #include "exec/address-spaces.h" 25 #include "trace.h" 26 27 #include "hw/ppc/spapr.h" 28 29 #include <libfdt.h> 30 31 enum sPAPRTCEAccess { 32 SPAPR_TCE_FAULT = 0, 33 SPAPR_TCE_RO = 1, 34 SPAPR_TCE_WO = 2, 35 SPAPR_TCE_RW = 3, 36 }; 37 38 static QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables; 39 40 static sPAPRTCETable *spapr_tce_find_by_liobn(uint32_t liobn) 41 { 42 sPAPRTCETable *tcet; 43 44 if (liobn & 0xFFFFFFFF00000000ULL) { 45 hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n", 46 liobn); 47 return NULL; 48 } 49 50 QLIST_FOREACH(tcet, &spapr_tce_tables, list) { 51 if (tcet->liobn == liobn) { 52 return tcet; 53 } 54 } 55 56 return NULL; 57 } 58 59 static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr) 60 { 61 sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu); 62 uint64_t tce; 63 IOMMUTLBEntry ret = { 64 .target_as = &address_space_memory, 65 .iova = 0, 66 .translated_addr = 0, 67 .addr_mask = ~(hwaddr)0, 68 .perm = IOMMU_NONE, 69 }; 70 71 if (tcet->bypass) { 72 ret.perm = IOMMU_RW; 73 } else if (addr < tcet->window_size) { 74 /* Check if we are in bound */ 75 tce = tcet->table[addr >> SPAPR_TCE_PAGE_SHIFT]; 76 ret.iova = addr & ~SPAPR_TCE_PAGE_MASK; 77 ret.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK; 78 ret.addr_mask = SPAPR_TCE_PAGE_MASK; 79 ret.perm = tce; 80 } 81 trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm, 82 ret.addr_mask); 83 84 return ret; 85 } 86 87 static int spapr_tce_table_pre_load(void *opaque) 88 { 89 sPAPRTCETable *tcet = SPAPR_TCE_TABLE(opaque); 90 91 tcet->nb_table = tcet->window_size >> SPAPR_TCE_PAGE_SHIFT; 92 93 return 0; 94 } 95 96 static const VMStateDescription vmstate_spapr_tce_table = { 97 .name = "spapr_iommu", 98 .version_id = 1, 99 .minimum_version_id = 1, 100 .pre_load = spapr_tce_table_pre_load, 101 .fields = (VMStateField[]) { 102 /* Sanity check */ 103 VMSTATE_UINT32_EQUAL(liobn, sPAPRTCETable), 104 VMSTATE_UINT32_EQUAL(window_size, sPAPRTCETable), 105 106 /* IOMMU state */ 107 VMSTATE_BOOL(bypass, sPAPRTCETable), 108 VMSTATE_VARRAY_UINT32(table, sPAPRTCETable, nb_table, 0, vmstate_info_uint64, uint64_t), 109 110 VMSTATE_END_OF_LIST() 111 }, 112 }; 113 114 static MemoryRegionIOMMUOps spapr_iommu_ops = { 115 .translate = spapr_tce_translate_iommu, 116 }; 117 118 static int spapr_tce_table_realize(DeviceState *dev) 119 { 120 sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); 121 122 if (kvm_enabled()) { 123 tcet->table = kvmppc_create_spapr_tce(tcet->liobn, 124 tcet->window_size, 125 &tcet->fd); 126 } 127 128 if (!tcet->table) { 129 size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) 130 * sizeof(uint64_t); 131 tcet->table = g_malloc0(table_size); 132 } 133 tcet->nb_table = tcet->window_size >> SPAPR_TCE_PAGE_SHIFT; 134 135 trace_spapr_iommu_new_table(tcet->liobn, tcet, tcet->table, tcet->fd); 136 137 memory_region_init_iommu(&tcet->iommu, OBJECT(dev), &spapr_iommu_ops, 138 "iommu-spapr", ram_size); 139 140 QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list); 141 142 vmstate_register(DEVICE(tcet), tcet->liobn, &vmstate_spapr_tce_table, 143 tcet); 144 145 return 0; 146 } 147 148 sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn, size_t window_size) 149 { 150 sPAPRTCETable *tcet; 151 152 if (spapr_tce_find_by_liobn(liobn)) { 153 fprintf(stderr, "Attempted to create TCE table with duplicate" 154 " LIOBN 0x%x\n", liobn); 155 return NULL; 156 } 157 158 if (!window_size) { 159 return NULL; 160 } 161 162 tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE)); 163 tcet->liobn = liobn; 164 tcet->window_size = window_size; 165 166 object_property_add_child(OBJECT(owner), "tce-table", OBJECT(tcet), NULL); 167 168 object_property_set_bool(OBJECT(tcet), true, "realized", NULL); 169 170 return tcet; 171 } 172 173 static void spapr_tce_table_finalize(Object *obj) 174 { 175 sPAPRTCETable *tcet = SPAPR_TCE_TABLE(obj); 176 177 QLIST_REMOVE(tcet, list); 178 179 if (!kvm_enabled() || 180 (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, 181 tcet->window_size) != 0)) { 182 g_free(tcet->table); 183 } 184 } 185 186 MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet) 187 { 188 return &tcet->iommu; 189 } 190 191 void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass) 192 { 193 tcet->bypass = bypass; 194 } 195 196 static void spapr_tce_reset(DeviceState *dev) 197 { 198 sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); 199 size_t table_size = (tcet->window_size >> SPAPR_TCE_PAGE_SHIFT) 200 * sizeof(uint64_t); 201 202 tcet->bypass = false; 203 memset(tcet->table, 0, table_size); 204 } 205 206 static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, 207 target_ulong tce) 208 { 209 IOMMUTLBEntry entry; 210 211 if (ioba >= tcet->window_size) { 212 hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x" 213 TARGET_FMT_lx "\n", ioba); 214 return H_PARAMETER; 215 } 216 217 tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT] = tce; 218 219 entry.target_as = &address_space_memory, 220 entry.iova = ioba & ~SPAPR_TCE_PAGE_MASK; 221 entry.translated_addr = tce & ~SPAPR_TCE_PAGE_MASK; 222 entry.addr_mask = SPAPR_TCE_PAGE_MASK; 223 entry.perm = tce; 224 memory_region_notify_iommu(&tcet->iommu, entry); 225 226 return H_SUCCESS; 227 } 228 229 static target_ulong h_put_tce_indirect(PowerPCCPU *cpu, 230 sPAPREnvironment *spapr, 231 target_ulong opcode, target_ulong *args) 232 { 233 int i; 234 target_ulong liobn = args[0]; 235 target_ulong ioba = args[1]; 236 target_ulong ioba1 = ioba; 237 target_ulong tce_list = args[2]; 238 target_ulong npages = args[3]; 239 target_ulong ret = H_PARAMETER; 240 sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); 241 CPUState *cs = CPU(cpu); 242 243 if (!tcet) { 244 return H_PARAMETER; 245 } 246 247 if (npages > 512) { 248 return H_PARAMETER; 249 } 250 251 ioba &= ~SPAPR_TCE_PAGE_MASK; 252 tce_list &= ~SPAPR_TCE_PAGE_MASK; 253 254 for (i = 0; i < npages; ++i, ioba += SPAPR_TCE_PAGE_SIZE) { 255 target_ulong tce = ldq_phys(cs->as, tce_list + 256 i * sizeof(target_ulong)); 257 ret = put_tce_emu(tcet, ioba, tce); 258 if (ret) { 259 break; 260 } 261 } 262 263 /* Trace last successful or the first problematic entry */ 264 i = i ? (i - 1) : 0; 265 trace_spapr_iommu_indirect(liobn, ioba1, tce_list, i, 266 ldq_phys(cs->as, 267 tce_list + i * sizeof(target_ulong)), 268 ret); 269 270 return ret; 271 } 272 273 static target_ulong h_stuff_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, 274 target_ulong opcode, target_ulong *args) 275 { 276 int i; 277 target_ulong liobn = args[0]; 278 target_ulong ioba = args[1]; 279 target_ulong tce_value = args[2]; 280 target_ulong npages = args[3]; 281 target_ulong ret = H_PARAMETER; 282 sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); 283 284 if (!tcet) { 285 return H_PARAMETER; 286 } 287 288 if (npages > tcet->nb_table) { 289 return H_PARAMETER; 290 } 291 292 ioba &= ~SPAPR_TCE_PAGE_MASK; 293 294 for (i = 0; i < npages; ++i, ioba += SPAPR_TCE_PAGE_SIZE) { 295 ret = put_tce_emu(tcet, ioba, tce_value); 296 if (ret) { 297 break; 298 } 299 } 300 trace_spapr_iommu_stuff(liobn, ioba, tce_value, npages, ret); 301 302 return ret; 303 } 304 305 static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, 306 target_ulong opcode, target_ulong *args) 307 { 308 target_ulong liobn = args[0]; 309 target_ulong ioba = args[1]; 310 target_ulong tce = args[2]; 311 target_ulong ret = H_PARAMETER; 312 sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); 313 314 ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); 315 316 if (tcet) { 317 ret = put_tce_emu(tcet, ioba, tce); 318 } 319 trace_spapr_iommu_put(liobn, ioba, tce, ret); 320 321 return ret; 322 } 323 324 static target_ulong get_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, 325 target_ulong *tce) 326 { 327 if (ioba >= tcet->window_size) { 328 hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x" 329 TARGET_FMT_lx "\n", ioba); 330 return H_PARAMETER; 331 } 332 333 *tce = tcet->table[ioba >> SPAPR_TCE_PAGE_SHIFT]; 334 335 return H_SUCCESS; 336 } 337 338 static target_ulong h_get_tce(PowerPCCPU *cpu, sPAPREnvironment *spapr, 339 target_ulong opcode, target_ulong *args) 340 { 341 target_ulong liobn = args[0]; 342 target_ulong ioba = args[1]; 343 target_ulong tce = 0; 344 target_ulong ret = H_PARAMETER; 345 sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); 346 347 ioba &= ~(SPAPR_TCE_PAGE_SIZE - 1); 348 349 if (tcet) { 350 ret = get_tce_emu(tcet, ioba, &tce); 351 if (!ret) { 352 args[0] = tce; 353 } 354 } 355 trace_spapr_iommu_get(liobn, ioba, ret, tce); 356 357 return ret; 358 } 359 360 int spapr_dma_dt(void *fdt, int node_off, const char *propname, 361 uint32_t liobn, uint64_t window, uint32_t size) 362 { 363 uint32_t dma_prop[5]; 364 int ret; 365 366 dma_prop[0] = cpu_to_be32(liobn); 367 dma_prop[1] = cpu_to_be32(window >> 32); 368 dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF); 369 dma_prop[3] = 0; /* window size is 32 bits */ 370 dma_prop[4] = cpu_to_be32(size); 371 372 ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); 373 if (ret < 0) { 374 return ret; 375 } 376 377 ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); 378 if (ret < 0) { 379 return ret; 380 } 381 382 ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop)); 383 if (ret < 0) { 384 return ret; 385 } 386 387 return 0; 388 } 389 390 int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname, 391 sPAPRTCETable *tcet) 392 { 393 if (!tcet) { 394 return 0; 395 } 396 397 return spapr_dma_dt(fdt, node_off, propname, 398 tcet->liobn, 0, tcet->window_size); 399 } 400 401 static void spapr_tce_table_class_init(ObjectClass *klass, void *data) 402 { 403 DeviceClass *dc = DEVICE_CLASS(klass); 404 dc->init = spapr_tce_table_realize; 405 dc->reset = spapr_tce_reset; 406 407 QLIST_INIT(&spapr_tce_tables); 408 409 /* hcall-tce */ 410 spapr_register_hypercall(H_PUT_TCE, h_put_tce); 411 spapr_register_hypercall(H_GET_TCE, h_get_tce); 412 spapr_register_hypercall(H_PUT_TCE_INDIRECT, h_put_tce_indirect); 413 spapr_register_hypercall(H_STUFF_TCE, h_stuff_tce); 414 } 415 416 static TypeInfo spapr_tce_table_info = { 417 .name = TYPE_SPAPR_TCE_TABLE, 418 .parent = TYPE_DEVICE, 419 .instance_size = sizeof(sPAPRTCETable), 420 .class_init = spapr_tce_table_class_init, 421 .instance_finalize = spapr_tce_table_finalize, 422 }; 423 424 static void register_types(void) 425 { 426 type_register_static(&spapr_tce_table_info); 427 } 428 429 type_init(register_types); 430