| 1 | /* |
| 2 | * QEMU sPAPR VIO code |
| 3 | * |
| 4 | * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> |
| 5 | * Based on the s390 virtio bus code: |
| 6 | * Copyright (c) 2009 Alexander Graf <agraf@suse.de> |
| 7 | * |
| 8 | * This library is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This library is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #include "qemu/osdep.h" |
| 23 | #include "qemu/error-report.h" |
| 24 | #include "qapi/error.h" |
| 25 | #include "qapi/visitor.h" |
| 26 | #include "qemu/log.h" |
| 27 | #include "hw/core/loader.h" |
| 28 | #include "elf.h" |
| 29 | #include "hw/core/sysbus.h" |
| 30 | #include "system/kvm.h" |
| 31 | #include "system/device_tree.h" |
| 32 | #include "kvm_ppc.h" |
| 33 | #include "migration/vmstate.h" |
| 34 | |
| 35 | #include "hw/ppc/spapr.h" |
| 36 | #include "hw/ppc/spapr_vio.h" |
| 37 | #include "hw/ppc/fdt.h" |
| 38 | #include "trace.h" |
| 39 | |
| 40 | #include <libfdt.h> |
| 41 | |
| 42 | #define SPAPR_VIO_REG_BASE 0x71000000 |
| 43 | |
| 44 | static char *spapr_vio_get_dev_name(DeviceState *qdev) |
| 45 | { |
| 46 | SpaprVioDevice *dev = VIO_SPAPR_DEVICE(qdev); |
| 47 | SpaprVioDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 48 | |
| 49 | /* Device tree style name device@reg */ |
| 50 | return g_strdup_printf("%s@%x", pc->dt_name, dev->reg); |
| 51 | } |
| 52 | |
| 53 | static void spapr_vio_bus_class_init(ObjectClass *klass, const void *data) |
| 54 | { |
| 55 | BusClass *k = BUS_CLASS(klass); |
| 56 | |
| 57 | k->get_dev_path = spapr_vio_get_dev_name; |
| 58 | k->get_fw_dev_path = spapr_vio_get_dev_name; |
| 59 | } |
| 60 | |
| 61 | static const TypeInfo spapr_vio_bus_info = { |
| 62 | .name = TYPE_SPAPR_VIO_BUS, |
| 63 | .parent = TYPE_BUS, |
| 64 | .class_init = spapr_vio_bus_class_init, |
| 65 | .instance_size = sizeof(SpaprVioBus), |
| 66 | }; |
| 67 | |
| 68 | SpaprVioDevice *spapr_vio_find_by_reg(SpaprVioBus *bus, uint32_t reg) |
| 69 | { |
| 70 | BusChild *kid; |
| 71 | SpaprVioDevice *dev = NULL; |
| 72 | |
| 73 | QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| 74 | dev = (SpaprVioDevice *)kid->child; |
| 75 | if (dev->reg == reg) { |
| 76 | return dev; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | return NULL; |
| 81 | } |
| 82 | |
| 83 | static int vio_make_devnode(SpaprVioDevice *dev, |
| 84 | void *fdt) |
| 85 | { |
| 86 | SpaprVioDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 87 | int vdevice_off, node_off, ret; |
| 88 | char *dt_name; |
| 89 | const char *dt_compatible; |
| 90 | |
| 91 | vdevice_off = fdt_path_offset(fdt, "/vdevice"); |
| 92 | if (vdevice_off < 0) { |
| 93 | return vdevice_off; |
| 94 | } |
| 95 | |
| 96 | dt_name = spapr_vio_get_dev_name(DEVICE(dev)); |
| 97 | node_off = fdt_add_subnode(fdt, vdevice_off, dt_name); |
| 98 | g_free(dt_name); |
| 99 | if (node_off < 0) { |
| 100 | return node_off; |
| 101 | } |
| 102 | |
| 103 | ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg); |
| 104 | if (ret < 0) { |
| 105 | return ret; |
| 106 | } |
| 107 | |
| 108 | if (pc->dt_type) { |
| 109 | ret = fdt_setprop_string(fdt, node_off, "device_type", |
| 110 | pc->dt_type); |
| 111 | if (ret < 0) { |
| 112 | return ret; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | if (pc->get_dt_compatible) { |
| 117 | dt_compatible = pc->get_dt_compatible(dev); |
| 118 | } else { |
| 119 | dt_compatible = pc->dt_compatible; |
| 120 | } |
| 121 | |
| 122 | if (dt_compatible) { |
| 123 | ret = fdt_setprop_string(fdt, node_off, "compatible", |
| 124 | dt_compatible); |
| 125 | if (ret < 0) { |
| 126 | return ret; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | if (dev->irq) { |
| 131 | uint32_t ints_prop[2]; |
| 132 | |
| 133 | spapr_dt_irq(ints_prop, dev->irq, false); |
| 134 | ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop, |
| 135 | sizeof(ints_prop)); |
| 136 | if (ret < 0) { |
| 137 | return ret; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet); |
| 142 | if (ret < 0) { |
| 143 | return ret; |
| 144 | } |
| 145 | |
| 146 | if (pc->devnode) { |
| 147 | ret = (pc->devnode)(dev, fdt, node_off); |
| 148 | if (ret < 0) { |
| 149 | return ret; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return node_off; |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * CRQ handling |
| 158 | */ |
| 159 | static target_ulong h_reg_crq(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 160 | target_ulong opcode, target_ulong *args) |
| 161 | { |
| 162 | target_ulong reg = args[0]; |
| 163 | target_ulong queue_addr = args[1]; |
| 164 | target_ulong queue_len = args[2]; |
| 165 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 166 | |
| 167 | if (!dev) { |
| 168 | hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 169 | return H_PARAMETER; |
| 170 | } |
| 171 | |
| 172 | /* We can't grok a queue size bigger than 256M for now */ |
| 173 | if (queue_len < 0x1000 || queue_len > 0x10000000) { |
| 174 | hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx |
| 175 | ")\n", queue_len); |
| 176 | return H_PARAMETER; |
| 177 | } |
| 178 | |
| 179 | /* Check queue alignment */ |
| 180 | if (queue_addr & 0xfff) { |
| 181 | hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr); |
| 182 | return H_PARAMETER; |
| 183 | } |
| 184 | |
| 185 | /* Check if device supports CRQs */ |
| 186 | if (!dev->crq.SendFunc) { |
| 187 | hcall_dprintf("Device does not support CRQ\n"); |
| 188 | return H_NOT_FOUND; |
| 189 | } |
| 190 | |
| 191 | /* Already a queue ? */ |
| 192 | if (dev->crq.qsize) { |
| 193 | hcall_dprintf("CRQ already registered\n"); |
| 194 | return H_RESOURCE; |
| 195 | } |
| 196 | dev->crq.qladdr = queue_addr; |
| 197 | dev->crq.qsize = queue_len; |
| 198 | dev->crq.qnext = 0; |
| 199 | |
| 200 | trace_spapr_vio_h_reg_crq(reg, queue_addr, queue_len); |
| 201 | return H_SUCCESS; |
| 202 | } |
| 203 | |
| 204 | static target_ulong free_crq(SpaprVioDevice *dev) |
| 205 | { |
| 206 | dev->crq.qladdr = 0; |
| 207 | dev->crq.qsize = 0; |
| 208 | dev->crq.qnext = 0; |
| 209 | |
| 210 | trace_spapr_vio_free_crq(dev->reg); |
| 211 | |
| 212 | return H_SUCCESS; |
| 213 | } |
| 214 | |
| 215 | static target_ulong h_free_crq(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 216 | target_ulong opcode, target_ulong *args) |
| 217 | { |
| 218 | target_ulong reg = args[0]; |
| 219 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 220 | |
| 221 | if (!dev) { |
| 222 | hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 223 | return H_PARAMETER; |
| 224 | } |
| 225 | |
| 226 | return free_crq(dev); |
| 227 | } |
| 228 | |
| 229 | static target_ulong h_send_crq(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 230 | target_ulong opcode, target_ulong *args) |
| 231 | { |
| 232 | target_ulong reg = args[0]; |
| 233 | target_ulong msg_hi = args[1]; |
| 234 | target_ulong msg_lo = args[2]; |
| 235 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 236 | uint64_t crq_mangle[2]; |
| 237 | |
| 238 | if (!dev) { |
| 239 | hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 240 | return H_PARAMETER; |
| 241 | } |
| 242 | crq_mangle[0] = cpu_to_be64(msg_hi); |
| 243 | crq_mangle[1] = cpu_to_be64(msg_lo); |
| 244 | |
| 245 | if (dev->crq.SendFunc) { |
| 246 | return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle); |
| 247 | } |
| 248 | |
| 249 | return H_HARDWARE; |
| 250 | } |
| 251 | |
| 252 | static target_ulong h_enable_crq(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 253 | target_ulong opcode, target_ulong *args) |
| 254 | { |
| 255 | target_ulong reg = args[0]; |
| 256 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 257 | |
| 258 | if (!dev) { |
| 259 | hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg); |
| 260 | return H_PARAMETER; |
| 261 | } |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | /* Returns negative error, 0 success, or positive: queue full */ |
| 267 | int spapr_vio_send_crq(SpaprVioDevice *dev, uint8_t *crq) |
| 268 | { |
| 269 | int rc; |
| 270 | uint8_t byte; |
| 271 | |
| 272 | if (!dev->crq.qsize) { |
| 273 | error_report("spapr_vio_send_creq on uninitialized queue"); |
| 274 | return -1; |
| 275 | } |
| 276 | |
| 277 | /* Maybe do a fast path for KVM just writing to the pages */ |
| 278 | rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1); |
| 279 | if (rc) { |
| 280 | return rc; |
| 281 | } |
| 282 | if (byte != 0) { |
| 283 | return 1; |
| 284 | } |
| 285 | |
| 286 | rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8, |
| 287 | &crq[8], 8); |
| 288 | if (rc) { |
| 289 | return rc; |
| 290 | } |
| 291 | |
| 292 | kvmppc_eieio(); |
| 293 | |
| 294 | rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8); |
| 295 | if (rc) { |
| 296 | return rc; |
| 297 | } |
| 298 | |
| 299 | dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize; |
| 300 | |
| 301 | if (dev->signal_state & 1) { |
| 302 | spapr_vio_irq_pulse(dev); |
| 303 | } |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | /* "quiesce" handling */ |
| 309 | |
| 310 | static void spapr_vio_quiesce_one(SpaprVioDevice *dev) |
| 311 | { |
| 312 | if (dev->tcet) { |
| 313 | device_cold_reset(DEVICE(dev->tcet)); |
| 314 | } |
| 315 | free_crq(dev); |
| 316 | } |
| 317 | |
| 318 | void spapr_vio_set_bypass(SpaprVioDevice *dev, bool bypass) |
| 319 | { |
| 320 | if (!dev->tcet) { |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | memory_region_set_enabled(&dev->mrbypass, bypass); |
| 325 | memory_region_set_enabled(spapr_tce_get_iommu(dev->tcet), !bypass); |
| 326 | |
| 327 | dev->tcet->bypass = bypass; |
| 328 | } |
| 329 | |
| 330 | static void rtas_set_tce_bypass(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 331 | uint32_t token, |
| 332 | uint32_t nargs, target_ulong args, |
| 333 | uint32_t nret, target_ulong rets) |
| 334 | { |
| 335 | SpaprVioBus *bus = spapr->vio_bus; |
| 336 | SpaprVioDevice *dev; |
| 337 | uint32_t unit, enable; |
| 338 | |
| 339 | if (nargs != 2) { |
| 340 | rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); |
| 341 | return; |
| 342 | } |
| 343 | unit = rtas_ld(args, 0); |
| 344 | enable = rtas_ld(args, 1); |
| 345 | dev = spapr_vio_find_by_reg(bus, unit); |
| 346 | if (!dev) { |
| 347 | rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); |
| 348 | return; |
| 349 | } |
| 350 | |
| 351 | if (!dev->tcet) { |
| 352 | rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | spapr_vio_set_bypass(dev, !!enable); |
| 357 | |
| 358 | rtas_st(rets, 0, RTAS_OUT_SUCCESS); |
| 359 | } |
| 360 | |
| 361 | static void rtas_quiesce(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 362 | uint32_t token, |
| 363 | uint32_t nargs, target_ulong args, |
| 364 | uint32_t nret, target_ulong rets) |
| 365 | { |
| 366 | SpaprVioBus *bus = spapr->vio_bus; |
| 367 | BusChild *kid; |
| 368 | SpaprVioDevice *dev = NULL; |
| 369 | |
| 370 | if (nargs != 0) { |
| 371 | rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); |
| 372 | return; |
| 373 | } |
| 374 | |
| 375 | QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| 376 | dev = (SpaprVioDevice *)kid->child; |
| 377 | spapr_vio_quiesce_one(dev); |
| 378 | } |
| 379 | |
| 380 | rtas_st(rets, 0, RTAS_OUT_SUCCESS); |
| 381 | } |
| 382 | |
| 383 | static SpaprVioDevice *reg_conflict(SpaprVioDevice *dev) |
| 384 | { |
| 385 | SpaprVioBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus); |
| 386 | BusChild *kid; |
| 387 | SpaprVioDevice *other; |
| 388 | |
| 389 | /* |
| 390 | * Check for a device other than the given one which is already |
| 391 | * using the requested address. We have to open code this because |
| 392 | * the given dev might already be in the list. |
| 393 | */ |
| 394 | QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| 395 | other = VIO_SPAPR_DEVICE(kid->child); |
| 396 | |
| 397 | if (other != dev && other->reg == dev->reg) { |
| 398 | return other; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static void spapr_vio_busdev_reset(DeviceState *qdev) |
| 406 | { |
| 407 | SpaprVioDevice *dev = VIO_SPAPR_DEVICE(qdev); |
| 408 | SpaprVioDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 409 | |
| 410 | /* Shut down the request queue and TCEs if necessary */ |
| 411 | spapr_vio_quiesce_one(dev); |
| 412 | |
| 413 | dev->signal_state = 0; |
| 414 | |
| 415 | spapr_vio_set_bypass(dev, false); |
| 416 | if (pc->reset) { |
| 417 | pc->reset(dev); |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * The register property of a VIO device is defined in libvirt using |
| 423 | * 0x1000 as a base register number plus a 0x1000 increment. For the |
| 424 | * VIO tty device, the base number is changed to 0x30000000. QEMU uses |
| 425 | * a base register number of 0x71000000 and then a simple increment. |
| 426 | * |
| 427 | * The formula below tries to compute a unique index number from the |
| 428 | * register value that will be used to define the IRQ number of the |
| 429 | * VIO device. |
| 430 | * |
| 431 | * A maximum of 256 VIO devices is covered. Collisions are possible |
| 432 | * but they will be detected when the IRQ is claimed. |
| 433 | */ |
| 434 | static inline uint32_t spapr_vio_reg_to_irq(uint32_t reg) |
| 435 | { |
| 436 | uint32_t irq; |
| 437 | |
| 438 | if (reg >= SPAPR_VIO_REG_BASE) { |
| 439 | /* |
| 440 | * VIO device register values when allocated by QEMU. For |
| 441 | * these, we simply mask the high bits to fit the overall |
| 442 | * range: [0x00 - 0xff]. |
| 443 | * |
| 444 | * The nvram VIO device (reg=0x71000000) is a static device of |
| 445 | * the pseries machine and so is always allocated by QEMU. Its |
| 446 | * IRQ number is 0x0. |
| 447 | */ |
| 448 | irq = reg & 0xff; |
| 449 | |
| 450 | } else if (reg >= 0x30000000) { |
| 451 | /* |
| 452 | * VIO tty devices register values, when allocated by libvirt, |
| 453 | * are mapped in range [0xf0 - 0xff], gives us a maximum of 16 |
| 454 | * vtys. |
| 455 | */ |
| 456 | irq = 0xf0 | ((reg >> 12) & 0xf); |
| 457 | |
| 458 | } else { |
| 459 | /* |
| 460 | * Other VIO devices register values, when allocated by |
| 461 | * libvirt, should be mapped in range [0x00 - 0xef]. Conflicts |
| 462 | * will be detected when IRQ is claimed. |
| 463 | */ |
| 464 | irq = (reg >> 12) & 0xff; |
| 465 | } |
| 466 | |
| 467 | return SPAPR_IRQ_VIO | irq; |
| 468 | } |
| 469 | |
| 470 | static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp) |
| 471 | { |
| 472 | SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); |
| 473 | SpaprVioDevice *dev = (SpaprVioDevice *)qdev; |
| 474 | SpaprVioDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 475 | char *id; |
| 476 | |
| 477 | if (dev->reg != -1) { |
| 478 | /* |
| 479 | * Explicitly assigned address, just verify that no-one else |
| 480 | * is using it. other mechanism). We have to open code this |
| 481 | * rather than using spapr_vio_find_by_reg() because sdev |
| 482 | * itself is already in the list. |
| 483 | */ |
| 484 | SpaprVioDevice *other = reg_conflict(dev); |
| 485 | |
| 486 | if (other) { |
| 487 | error_setg(errp, "%s and %s devices conflict at address %#x", |
| 488 | object_get_typename(OBJECT(qdev)), |
| 489 | object_get_typename(OBJECT(&other->qdev)), |
| 490 | dev->reg); |
| 491 | return; |
| 492 | } |
| 493 | } else { |
| 494 | /* Need to assign an address */ |
| 495 | SpaprVioBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus); |
| 496 | |
| 497 | do { |
| 498 | dev->reg = bus->next_reg++; |
| 499 | } while (reg_conflict(dev)); |
| 500 | } |
| 501 | |
| 502 | /* Don't overwrite ids assigned on the command line */ |
| 503 | if (!dev->qdev.id) { |
| 504 | id = spapr_vio_get_dev_name(DEVICE(dev)); |
| 505 | dev->qdev.id = id; |
| 506 | } |
| 507 | |
| 508 | dev->irq = spapr_vio_reg_to_irq(dev->reg); |
| 509 | |
| 510 | if (spapr_irq_claim(spapr, dev->irq, false, errp) < 0) { |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | if (pc->rtce_window_size) { |
| 515 | uint32_t liobn = SPAPR_VIO_LIOBN(dev->reg); |
| 516 | |
| 517 | memory_region_init(&dev->mrroot, OBJECT(dev), "iommu-spapr-root", |
| 518 | MACHINE(spapr)->ram_size); |
| 519 | memory_region_init_alias(&dev->mrbypass, OBJECT(dev), |
| 520 | "iommu-spapr-bypass", get_system_memory(), |
| 521 | 0, MACHINE(spapr)->ram_size); |
| 522 | memory_region_add_subregion_overlap(&dev->mrroot, 0, &dev->mrbypass, 1); |
| 523 | address_space_init(&dev->as, &dev->mrroot, qdev->id); |
| 524 | |
| 525 | dev->tcet = spapr_tce_new_table(qdev, liobn); |
| 526 | spapr_tce_table_enable(dev->tcet, SPAPR_TCE_PAGE_SHIFT, 0, |
| 527 | pc->rtce_window_size >> SPAPR_TCE_PAGE_SHIFT); |
| 528 | dev->tcet->vdev = dev; |
| 529 | memory_region_add_subregion_overlap(&dev->mrroot, 0, |
| 530 | spapr_tce_get_iommu(dev->tcet), 2); |
| 531 | } |
| 532 | |
| 533 | pc->realize(dev, errp); |
| 534 | } |
| 535 | |
| 536 | static target_ulong h_vio_signal(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 537 | target_ulong opcode, |
| 538 | target_ulong *args) |
| 539 | { |
| 540 | target_ulong reg = args[0]; |
| 541 | target_ulong mode = args[1]; |
| 542 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 543 | SpaprVioDeviceClass *pc; |
| 544 | |
| 545 | if (!dev) { |
| 546 | return H_PARAMETER; |
| 547 | } |
| 548 | |
| 549 | pc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 550 | |
| 551 | if (mode & ~pc->signal_mask) { |
| 552 | return H_PARAMETER; |
| 553 | } |
| 554 | |
| 555 | dev->signal_state = mode; |
| 556 | |
| 557 | return H_SUCCESS; |
| 558 | } |
| 559 | |
| 560 | SpaprVioBus *spapr_vio_bus_init(void) |
| 561 | { |
| 562 | SpaprVioBus *bus; |
| 563 | BusState *qbus; |
| 564 | DeviceState *dev; |
| 565 | |
| 566 | /* Create bridge device */ |
| 567 | dev = qdev_new(TYPE_SPAPR_VIO_BRIDGE); |
| 568 | |
| 569 | /* Create bus on bridge device */ |
| 570 | qbus = qbus_new(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio"); |
| 571 | bus = SPAPR_VIO_BUS(qbus); |
| 572 | bus->next_reg = SPAPR_VIO_REG_BASE; |
| 573 | |
| 574 | sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); |
| 575 | |
| 576 | /* hcall-vio */ |
| 577 | spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal); |
| 578 | |
| 579 | /* hcall-crq */ |
| 580 | spapr_register_hypercall(H_REG_CRQ, h_reg_crq); |
| 581 | spapr_register_hypercall(H_FREE_CRQ, h_free_crq); |
| 582 | spapr_register_hypercall(H_SEND_CRQ, h_send_crq); |
| 583 | spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq); |
| 584 | |
| 585 | /* RTAS calls */ |
| 586 | spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS, "ibm,set-tce-bypass", |
| 587 | rtas_set_tce_bypass); |
| 588 | spapr_rtas_register(RTAS_QUIESCE, "quiesce", rtas_quiesce); |
| 589 | |
| 590 | return bus; |
| 591 | } |
| 592 | |
| 593 | static void spapr_vio_bridge_class_init(ObjectClass *klass, const void *data) |
| 594 | { |
| 595 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 596 | |
| 597 | dc->fw_name = "vdevice"; |
| 598 | } |
| 599 | |
| 600 | static const TypeInfo spapr_vio_bridge_info = { |
| 601 | .name = TYPE_SPAPR_VIO_BRIDGE, |
| 602 | .parent = TYPE_SYS_BUS_DEVICE, |
| 603 | .class_init = spapr_vio_bridge_class_init, |
| 604 | }; |
| 605 | |
| 606 | const VMStateDescription vmstate_spapr_vio = { |
| 607 | .name = "spapr_vio", |
| 608 | .version_id = 1, |
| 609 | .minimum_version_id = 1, |
| 610 | .fields = (const VMStateField[]) { |
| 611 | /* Sanity check */ |
| 612 | VMSTATE_UINT32_EQUAL(reg, SpaprVioDevice), |
| 613 | VMSTATE_UINT32_EQUAL(irq, SpaprVioDevice), |
| 614 | |
| 615 | /* General VIO device state */ |
| 616 | VMSTATE_UINT64(signal_state, SpaprVioDevice), |
| 617 | VMSTATE_UINT64(crq.qladdr, SpaprVioDevice), |
| 618 | VMSTATE_UINT32(crq.qsize, SpaprVioDevice), |
| 619 | VMSTATE_UINT32(crq.qnext, SpaprVioDevice), |
| 620 | |
| 621 | VMSTATE_END_OF_LIST() |
| 622 | }, |
| 623 | }; |
| 624 | |
| 625 | static void vio_spapr_device_class_init(ObjectClass *klass, const void *data) |
| 626 | { |
| 627 | DeviceClass *k = DEVICE_CLASS(klass); |
| 628 | k->realize = spapr_vio_busdev_realize; |
| 629 | device_class_set_legacy_reset(k, spapr_vio_busdev_reset); |
| 630 | k->bus_type = TYPE_SPAPR_VIO_BUS; |
| 631 | } |
| 632 | |
| 633 | static const TypeInfo spapr_vio_type_info = { |
| 634 | .name = TYPE_VIO_SPAPR_DEVICE, |
| 635 | .parent = TYPE_DEVICE, |
| 636 | .instance_size = sizeof(SpaprVioDevice), |
| 637 | .abstract = true, |
| 638 | .class_size = sizeof(SpaprVioDeviceClass), |
| 639 | .class_init = vio_spapr_device_class_init, |
| 640 | }; |
| 641 | |
| 642 | static void spapr_vio_register_types(void) |
| 643 | { |
| 644 | type_register_static(&spapr_vio_bus_info); |
| 645 | type_register_static(&spapr_vio_bridge_info); |
| 646 | type_register_static(&spapr_vio_type_info); |
| 647 | } |
| 648 | |
| 649 | type_init(spapr_vio_register_types) |
| 650 | |
| 651 | static int compare_reg(const void *p1, const void *p2) |
| 652 | { |
| 653 | SpaprVioDevice const *dev1, *dev2; |
| 654 | |
| 655 | dev1 = (SpaprVioDevice *)*(DeviceState **)p1; |
| 656 | dev2 = (SpaprVioDevice *)*(DeviceState **)p2; |
| 657 | |
| 658 | if (dev1->reg < dev2->reg) { |
| 659 | return -1; |
| 660 | } |
| 661 | if (dev1->reg == dev2->reg) { |
| 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | /* dev1->reg > dev2->reg */ |
| 666 | return 1; |
| 667 | } |
| 668 | |
| 669 | void spapr_dt_vdevice(SpaprVioBus *bus, void *fdt) |
| 670 | { |
| 671 | DeviceState *qdev, **qdevs; |
| 672 | BusChild *kid; |
| 673 | int i, num, ret = 0; |
| 674 | int node; |
| 675 | |
| 676 | _FDT(node = fdt_add_subnode(fdt, 0, "vdevice")); |
| 677 | |
| 678 | _FDT(fdt_setprop_string(fdt, node, "device_type", "vdevice")); |
| 679 | _FDT(fdt_setprop_string(fdt, node, "compatible", "IBM,vdevice")); |
| 680 | _FDT(fdt_setprop_cell(fdt, node, "#address-cells", 1)); |
| 681 | _FDT(fdt_setprop_cell(fdt, node, "#size-cells", 0)); |
| 682 | _FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2)); |
| 683 | _FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0)); |
| 684 | |
| 685 | /* Count qdevs on the bus list */ |
| 686 | num = 0; |
| 687 | QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| 688 | num++; |
| 689 | } |
| 690 | |
| 691 | /* Copy out into an array of pointers */ |
| 692 | qdevs = g_new(DeviceState *, num); |
| 693 | num = 0; |
| 694 | QTAILQ_FOREACH(kid, &bus->bus.children, sibling) { |
| 695 | qdevs[num++] = kid->child; |
| 696 | } |
| 697 | |
| 698 | /* Sort the array */ |
| 699 | qsort(qdevs, num, sizeof(qdev), compare_reg); |
| 700 | |
| 701 | /* Hack alert. Give the devices to libfdt in reverse order, we happen |
| 702 | * to know that will mean they are in forward order in the tree. */ |
| 703 | for (i = num - 1; i >= 0; i--) { |
| 704 | SpaprVioDevice *dev = (SpaprVioDevice *)(qdevs[i]); |
| 705 | SpaprVioDeviceClass *vdc = VIO_SPAPR_DEVICE_GET_CLASS(dev); |
| 706 | |
| 707 | ret = vio_make_devnode(dev, fdt); |
| 708 | if (ret < 0) { |
| 709 | error_report("Couldn't create device node /vdevice/%s@%"PRIx32, |
| 710 | vdc->dt_name, dev->reg); |
| 711 | exit(1); |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | g_free(qdevs); |
| 716 | } |
| 717 | |
| 718 | gchar *spapr_vio_stdout_path(SpaprVioBus *bus) |
| 719 | { |
| 720 | SpaprVioDevice *dev; |
| 721 | g_autofree char *name = NULL; |
| 722 | |
| 723 | dev = spapr_vty_get_default(bus); |
| 724 | if (!dev) { |
| 725 | return NULL; |
| 726 | } |
| 727 | |
| 728 | name = spapr_vio_get_dev_name(DEVICE(dev)); |
| 729 | |
| 730 | return g_strdup_printf("/vdevice/%s", name); |
| 731 | } |