hw/fw_cfg.c

   1 /*
   2  * QEMU Firmware configuration device emulation
   3  *
   4  * Copyright (c) 2008 Gleb Natapov
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "sysemu.h"
  26 #include "isa.h"
  27 #include "fw_cfg.h"
  28 #include "sysbus.h"
  29 #include "qemu-error.h"
  30
  31 /* debug firmware config */
  32 //#define DEBUG_FW_CFG
  33
  34 #ifdef DEBUG_FW_CFG
  35 #define FW_CFG_DPRINTF(fmt, ...)                        \
  36     do { printf("FW_CFG: " fmt , ## __VA_ARGS__); } while (0)
  37 #else
  38 #define FW_CFG_DPRINTF(fmt, ...)
  39 #endif
  40
  41 #define FW_CFG_SIZE 2
  42 #define FW_CFG_DATA_SIZE 1
  43
  44 typedef struct FWCfgEntry {
  45     uint32_t len;
  46     uint8_t *data;
  47     void *callback_opaque;
  48     FWCfgCallback callback;
  49 } FWCfgEntry;
  50
  51 struct FWCfgState {
  52     SysBusDevice busdev;
  53     MemoryRegion ctl_iomem, data_iomem, comb_iomem;
  54     uint32_t ctl_iobase, data_iobase;
  55     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
  56     FWCfgFiles *files;
  57     uint16_t cur_entry;
  58     uint32_t cur_offset;
  59     Notifier machine_ready;
  60 };
  61
  62 #define JPG_FILE 0
  63 #define BMP_FILE 1
  64
  65 static char *read_splashfile(char *filename, int *file_sizep, int *file_typep)
  66 {
  67     GError *err = NULL;
  68     gboolean res;
  69     gchar *content;
  70     int file_type = -1;
  71     unsigned int filehead = 0;
  72     int bmp_bpp;
  73
  74     res = g_file_get_contents(filename, &content, (gsize *)file_sizep, &err);
  75     if (res == FALSE) {
  76         error_report("failed to read splash file '%s'", filename);
  77         g_error_free(err);
  78         return NULL;
  79     }
  80
  81     /* check file size */
  82     if (*file_sizep < 30) {
  83         goto error;
  84     }
  85
  86     /* check magic ID */
  87     filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff;
  88     if (filehead == 0xd8ff) {
  89         file_type = JPG_FILE;
  90     } else if (filehead == 0x4d42) {
  91         file_type = BMP_FILE;
  92     } else {
  93         goto error;
  94     }
  95
  96     /* check BMP bpp */
  97     if (file_type == BMP_FILE) {
  98         bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff;
  99         if (bmp_bpp != 24) {
 100             goto error;
 101         }
 102     }
 103
 104     /* return values */
 105     *file_typep = file_type;
 106
 107     return content;
 108
 109 error:
 110     error_report("splash file '%s' format not recognized; must be JPEG "
 111                  "or 24 bit BMP", filename);
 112     g_free(content);
 113     return NULL;
 114 }
 115
 116 static void fw_cfg_bootsplash(FWCfgState *s)
 117 {
 118     int boot_splash_time = -1;
 119     const char *boot_splash_filename = NULL;
 120     char *p;
 121     char *filename, *file_data;
 122     int file_size;
 123     int file_type = -1;
 124     const char *temp;
 125
 126     /* get user configuration */
 127     QemuOptsList *plist = qemu_find_opts("boot-opts");
 128     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 129     if (opts != NULL) {
 130         temp = qemu_opt_get(opts, "splash");
 131         if (temp != NULL) {
 132             boot_splash_filename = temp;
 133         }
 134         temp = qemu_opt_get(opts, "splash-time");
 135         if (temp != NULL) {
 136             p = (char *)temp;
 137             boot_splash_time = strtol(p, (char **)&p, 10);
 138         }
 139     }
 140
 141     /* insert splash time if user configurated */
 142     if (boot_splash_time >= 0) {
 143         /* validate the input */
 144         if (boot_splash_time > 0xffff) {
 145             error_report("splash time is big than 65535, force it to 65535.");
 146             boot_splash_time = 0xffff;
 147         }
 148         /* use little endian format */
 149         qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
 150         qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
 151         fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
 152     }
 153
 154     /* insert splash file if user configurated */
 155     if (boot_splash_filename != NULL) {
 156         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
 157         if (filename == NULL) {
 158             error_report("failed to find file '%s'.", boot_splash_filename);
 159             return;
 160         }
 161
 162         /* loading file data */
 163         file_data = read_splashfile(filename, &file_size, &file_type);
 164         if (file_data == NULL) {
 165             g_free(filename);
 166             return;
 167         }
 168         if (boot_splash_filedata != NULL) {
 169             g_free(boot_splash_filedata);
 170         }
 171         boot_splash_filedata = (uint8_t *)file_data;
 172         boot_splash_filedata_size = file_size;
 173
 174         /* insert data */
 175         if (file_type == JPG_FILE) {
 176             fw_cfg_add_file(s, "bootsplash.jpg",
 177                     boot_splash_filedata, boot_splash_filedata_size);
 178         } else {
 179             fw_cfg_add_file(s, "bootsplash.bmp",
 180                     boot_splash_filedata, boot_splash_filedata_size);
 181         }
 182         g_free(filename);
 183     }
 184 }
 185
 186 static void fw_cfg_reboot(FWCfgState *s)
 187 {
 188     int reboot_timeout = -1;
 189     char *p;
 190     const char *temp;
 191
 192     /* get user configuration */
 193     QemuOptsList *plist = qemu_find_opts("boot-opts");
 194     QemuOpts *opts = QTAILQ_FIRST(&plist->head);
 195     if (opts != NULL) {
 196         temp = qemu_opt_get(opts, "reboot-timeout");
 197         if (temp != NULL) {
 198             p = (char *)temp;
 199             reboot_timeout = strtol(p, (char **)&p, 10);
 200         }
 201     }
 202     /* validate the input */
 203     if (reboot_timeout > 0xffff) {
 204         error_report("reboot timeout is larger than 65535, force it to 65535.");
 205         reboot_timeout = 0xffff;
 206     }
 207     fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
 208 }
 209
 210 static void fw_cfg_write(FWCfgState *s, uint8_t value)
 211 {
 212     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 213     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 214
 215     FW_CFG_DPRINTF("write %d\n", value);
 216
 217     if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
 218         s->cur_offset < e->len) {
 219         e->data[s->cur_offset++] = value;
 220         if (s->cur_offset == e->len) {
 221             e->callback(e->callback_opaque, e->data);
 222             s->cur_offset = 0;
 223         }
 224     }
 225 }
 226
 227 static int fw_cfg_select(FWCfgState *s, uint16_t key)
 228 {
 229     int ret;
 230
 231     s->cur_offset = 0;
 232     if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
 233         s->cur_entry = FW_CFG_INVALID;
 234         ret = 0;
 235     } else {
 236         s->cur_entry = key;
 237         ret = 1;
 238     }
 239
 240     FW_CFG_DPRINTF("select key %d (%sfound)\n", key, ret ? "" : "not ");
 241
 242     return ret;
 243 }
 244
 245 static uint8_t fw_cfg_read(FWCfgState *s)
 246 {
 247     int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
 248     FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK];
 249     uint8_t ret;
 250
 251     if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
 252         ret = 0;
 253     else
 254         ret = e->data[s->cur_offset++];
 255
 256     FW_CFG_DPRINTF("read %d\n", ret);
 257
 258     return ret;
 259 }
 260
 261 static uint64_t fw_cfg_data_mem_read(void *opaque, target_phys_addr_t addr,
 262                                      unsigned size)
 263 {
 264     return fw_cfg_read(opaque);
 265 }
 266
 267 static void fw_cfg_data_mem_write(void *opaque, target_phys_addr_t addr,
 268                                   uint64_t value, unsigned size)
 269 {
 270     fw_cfg_write(opaque, (uint8_t)value);
 271 }
 272
 273 static void fw_cfg_ctl_mem_write(void *opaque, target_phys_addr_t addr,
 274                                  uint64_t value, unsigned size)
 275 {
 276     fw_cfg_select(opaque, (uint16_t)value);
 277 }
 278
 279 static bool fw_cfg_ctl_mem_valid(void *opaque, target_phys_addr_t addr,
 280                                  unsigned size, bool is_write)
 281 {
 282     return is_write && size == 2;
 283 }
 284
 285 static uint64_t fw_cfg_comb_read(void *opaque, target_phys_addr_t addr,
 286                                  unsigned size)
 287 {
 288     return fw_cfg_read(opaque);
 289 }
 290
 291 static void fw_cfg_comb_write(void *opaque, target_phys_addr_t addr,
 292                               uint64_t value, unsigned size)
 293 {
 294     switch (size) {
 295     case 1:
 296         fw_cfg_write(opaque, (uint8_t)value);
 297         break;
 298     case 2:
 299         fw_cfg_select(opaque, (uint16_t)value);
 300         break;
 301     }
 302 }
 303
 304 static bool fw_cfg_comb_valid(void *opaque, target_phys_addr_t addr,
 305                                   unsigned size, bool is_write)
 306 {
 307     return (size == 1) || (is_write && size == 2);
 308 }
 309
 310 static const MemoryRegionOps fw_cfg_ctl_mem_ops = {
 311     .write = fw_cfg_ctl_mem_write,
 312     .endianness = DEVICE_NATIVE_ENDIAN,
 313     .valid.accepts = fw_cfg_ctl_mem_valid,
 314 };
 315
 316 static const MemoryRegionOps fw_cfg_data_mem_ops = {
 317     .read = fw_cfg_data_mem_read,
 318     .write = fw_cfg_data_mem_write,
 319     .endianness = DEVICE_NATIVE_ENDIAN,
 320     .valid = {
 321         .min_access_size = 1,
 322         .max_access_size = 1,
 323     },
 324 };
 325
 326 static const MemoryRegionOps fw_cfg_comb_mem_ops = {
 327     .read = fw_cfg_comb_read,
 328     .write = fw_cfg_comb_write,
 329     .endianness = DEVICE_NATIVE_ENDIAN,
 330     .valid.accepts = fw_cfg_comb_valid,
 331 };
 332
 333 static void fw_cfg_reset(DeviceState *d)
 334 {
 335     FWCfgState *s = DO_UPCAST(FWCfgState, busdev.qdev, d);
 336
 337     fw_cfg_select(s, 0);
 338 }
 339
 340 /* Save restore 32 bit int as uint16_t
 341    This is a Big hack, but it is how the old state did it.
 342    Or we broke compatibility in the state, or we can't use struct tm
 343  */
 344
 345 static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size)
 346 {
 347     uint32_t *v = pv;
 348     *v = qemu_get_be16(f);
 349     return 0;
 350 }
 351
 352 static void put_unused(QEMUFile *f, void *pv, size_t size)
 353 {
 354     fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
 355     fprintf(stderr, "This functions shouldn't be called.\n");
 356 }
 357
 358 static const VMStateInfo vmstate_hack_uint32_as_uint16 = {
 359     .name = "int32_as_uint16",
 360     .get  = get_uint32_as_uint16,
 361     .put  = put_unused,
 362 };
 363
 364 #define VMSTATE_UINT16_HACK(_f, _s, _t)                                    \
 365     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
 366
 367
 368 static bool is_version_1(void *opaque, int version_id)
 369 {
 370     return version_id == 1;
 371 }
 372
 373 static const VMStateDescription vmstate_fw_cfg = {
 374     .name = "fw_cfg",
 375     .version_id = 2,
 376     .minimum_version_id = 1,
 377     .minimum_version_id_old = 1,
 378     .fields      = (VMStateField []) {
 379         VMSTATE_UINT16(cur_entry, FWCfgState),
 380         VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1),
 381         VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
 382         VMSTATE_END_OF_LIST()
 383     }
 384 };
 385
 386 int fw_cfg_add_bytes(FWCfgState *s, uint16_t key, uint8_t *data, uint32_t len)
 387 {
 388     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 389
 390     key &= FW_CFG_ENTRY_MASK;
 391
 392     if (key >= FW_CFG_MAX_ENTRY)
 393         return 0;
 394
 395     s->entries[arch][key].data = data;
 396     s->entries[arch][key].len = len;
 397
 398     return 1;
 399 }
 400
 401 int fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
 402 {
 403     uint16_t *copy;
 404
 405     copy = g_malloc(sizeof(value));
 406     *copy = cpu_to_le16(value);
 407     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 408 }
 409
 410 int fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
 411 {
 412     uint32_t *copy;
 413
 414     copy = g_malloc(sizeof(value));
 415     *copy = cpu_to_le32(value);
 416     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 417 }
 418
 419 int fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
 420 {
 421     uint64_t *copy;
 422
 423     copy = g_malloc(sizeof(value));
 424     *copy = cpu_to_le64(value);
 425     return fw_cfg_add_bytes(s, key, (uint8_t *)copy, sizeof(value));
 426 }
 427
 428 int fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
 429                         void *callback_opaque, uint8_t *data, size_t len)
 430 {
 431     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 432
 433     if (!(key & FW_CFG_WRITE_CHANNEL))
 434         return 0;
 435
 436     key &= FW_CFG_ENTRY_MASK;
 437
 438     if (key >= FW_CFG_MAX_ENTRY || len > 65535)
 439         return 0;
 440
 441     s->entries[arch][key].data = data;
 442     s->entries[arch][key].len = len;
 443     s->entries[arch][key].callback_opaque = callback_opaque;
 444     s->entries[arch][key].callback = callback;
 445
 446     return 1;
 447 }
 448
 449 int fw_cfg_add_file(FWCfgState *s,  const char *filename, uint8_t *data,
 450                     uint32_t len)
 451 {
 452     int i, index;
 453
 454     if (!s->files) {
 455         int dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
 456         s->files = g_malloc0(dsize);
 457         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, (uint8_t*)s->files, dsize);
 458     }
 459
 460     index = be32_to_cpu(s->files->count);
 461     if (index == FW_CFG_FILE_SLOTS) {
 462         fprintf(stderr, "fw_cfg: out of file slots\n");
 463         return 0;
 464     }
 465
 466     fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len);
 467
 468     pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
 469             filename);
 470     for (i = 0; i < index; i++) {
 471         if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
 472             FW_CFG_DPRINTF("%s: skip duplicate: %s\n", __FUNCTION__,
 473                            s->files->f[index].name);
 474             return 1;
 475         }
 476     }
 477
 478     s->files->f[index].size   = cpu_to_be32(len);
 479     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
 480     FW_CFG_DPRINTF("%s: #%d: %s (%d bytes)\n", __FUNCTION__,
 481                    index, s->files->f[index].name, len);
 482
 483     s->files->count = cpu_to_be32(index+1);
 484     return 1;
 485 }
 486
 487 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
 488 {
 489     uint32_t len;
 490     FWCfgState *s = container_of(n, FWCfgState, machine_ready);
 491     char *bootindex = get_boot_devices_list(&len);
 492
 493     fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
 494 }
 495
 496 FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
 497                         target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
 498 {
 499     DeviceState *dev;
 500     SysBusDevice *d;
 501     FWCfgState *s;
 502
 503     dev = qdev_create(NULL, "fw_cfg");
 504     qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
 505     qdev_prop_set_uint32(dev, "data_iobase", data_port);
 506     qdev_init_nofail(dev);
 507     d = sysbus_from_qdev(dev);
 508
 509     s = DO_UPCAST(FWCfgState, busdev.qdev, dev);
 510
 511     if (ctl_addr) {
 512         sysbus_mmio_map(d, 0, ctl_addr);
 513     }
 514     if (data_addr) {
 515         sysbus_mmio_map(d, 1, data_addr);
 516     }
 517     fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (uint8_t *)"QEMU", 4);
 518     fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
 519     fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC));
 520     fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus);
 521     fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
 522     fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
 523     fw_cfg_bootsplash(s);
 524     fw_cfg_reboot(s);
 525
 526     s->machine_ready.notify = fw_cfg_machine_ready;
 527     qemu_add_machine_init_done_notifier(&s->machine_ready);
 528
 529     return s;
 530 }
 531
 532 static int fw_cfg_init1(SysBusDevice *dev)
 533 {
 534     FWCfgState *s = FROM_SYSBUS(FWCfgState, dev);
 535
 536     memory_region_init_io(&s->ctl_iomem, &fw_cfg_ctl_mem_ops, s,
 537                           "fwcfg.ctl", FW_CFG_SIZE);
 538     sysbus_init_mmio(dev, &s->ctl_iomem);
 539     memory_region_init_io(&s->data_iomem, &fw_cfg_data_mem_ops, s,
 540                           "fwcfg.data", FW_CFG_DATA_SIZE);
 541     sysbus_init_mmio(dev, &s->data_iomem);
 542     /* In case ctl and data overlap: */
 543     memory_region_init_io(&s->comb_iomem, &fw_cfg_comb_mem_ops, s,
 544                           "fwcfg", FW_CFG_SIZE);
 545
 546     if (s->ctl_iobase + 1 == s->data_iobase) {
 547         sysbus_add_io(dev, s->ctl_iobase, &s->comb_iomem);
 548     } else {
 549         if (s->ctl_iobase) {
 550             sysbus_add_io(dev, s->ctl_iobase, &s->ctl_iomem);
 551         }
 552         if (s->data_iobase) {
 553             sysbus_add_io(dev, s->data_iobase, &s->data_iomem);
 554         }
 555     }
 556     return 0;
 557 }
 558
 559 static Property fw_cfg_properties[] = {
 560     DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1),
 561     DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1),
 562     DEFINE_PROP_END_OF_LIST(),
 563 };
 564
 565 static void fw_cfg_class_init(ObjectClass *klass, void *data)
 566 {
 567     DeviceClass *dc = DEVICE_CLASS(klass);
 568     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 569
 570     k->init = fw_cfg_init1;
 571     dc->no_user = 1;
 572     dc->reset = fw_cfg_reset;
 573     dc->vmsd = &vmstate_fw_cfg;
 574     dc->props = fw_cfg_properties;
 575 }
 576
 577 static TypeInfo fw_cfg_info = {
 578     .name          = "fw_cfg",
 579     .parent        = TYPE_SYS_BUS_DEVICE,
 580     .instance_size = sizeof(FWCfgState),
 581     .class_init    = fw_cfg_class_init,
 582 };
 583
 584 static void fw_cfg_register_types(void)
 585 {
 586     type_register_static(&fw_cfg_info);
 587 }
 588
 589 type_init(fw_cfg_register_types)