palacios/src/palacios/vmm_dev_mgr.c

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <palacios/vmm_dev_mgr.h>
  21 #include <palacios/vm_guest.h>
  22 #include <palacios/vmm.h>
  23 #include <palacios/vmm_decoder.h>
  24
  25
  26 #ifndef CONFIG_DEBUG_DEV_MGR
  27 #undef PrintDebug
  28 #define PrintDebug(fmt, args...)
  29 #endif
  30
  31
  32 static struct hashtable * master_dev_table = NULL;
  33
  34 static uint_t dev_hash_fn(addr_t key) {
  35     char * name = (char *)key;
  36     return v3_hash_buffer((uchar_t *)name, strlen(name));
  37 }
  38
  39 static int dev_eq_fn(addr_t key1, addr_t key2) {
  40     char * name1 = (char *)key1;
  41     char * name2 = (char *)key2;
  42
  43     return (strcmp(name1, name2) == 0);
  44 }
  45
  46
  47 int v3_init_devices() {
  48     extern struct v3_device_info __start__v3_devices[];
  49     extern struct v3_device_info __stop__v3_devices[];
  50     struct v3_device_info * tmp_dev =  __start__v3_devices;
  51     int i = 0;
  52
  53 #ifdef CONFIG_DEBUG_DEV_MGR
  54     {
  55         int num_devices = (__stop__v3_devices - __start__v3_devices) / sizeof(struct v3_device_info);
  56         PrintDebug("%d Virtual devices registered with Palacios\n", num_devices);
  57     }
  58 #endif
  59
  60     PrintDebug("Start addres=%p, Stop address=%p\n", __start__v3_devices, __stop__v3_devices);
  61
  62     master_dev_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
  63
  64
  65
  66     while (tmp_dev != __stop__v3_devices) {
  67         PrintDebug("Device: %s\n", tmp_dev->name);
  68
  69         if (v3_htable_search(master_dev_table, (addr_t)(tmp_dev->name))) {
  70             PrintError("Multiple instance of device (%s)\n", tmp_dev->name);
  71             return -1;
  72         }
  73
  74         if (v3_htable_insert(master_dev_table,
  75                              (addr_t)(tmp_dev->name),
  76                              (addr_t)(tmp_dev->init)) == 0) {
  77             PrintError("Could not add device %s to master list\n", tmp_dev->name);
  78             return -1;
  79         }
  80
  81         tmp_dev = &(__start__v3_devices[++i]);
  82     }
  83
  84
  85     return 0;
  86 }
  87
  88
  89 int v3_init_dev_mgr(struct v3_vm_info * vm) {
  90     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
  91
  92     INIT_LIST_HEAD(&(mgr->dev_list));
  93     mgr->num_devs = 0;
  94
  95     mgr->dev_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
  96
  97     INIT_LIST_HEAD(&(mgr->blk_list));
  98     INIT_LIST_HEAD(&(mgr->net_list));
  99     INIT_LIST_HEAD(&(mgr->char_list));
 100     INIT_LIST_HEAD(&(mgr->console_list));
 101
 102     mgr->blk_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 103     mgr->net_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 104     mgr->char_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 105     mgr->console_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 106
 107     return 0;
 108 }
 109
 110
 111 int v3_dev_mgr_deinit(struct v3_vm_info * vm) {
 112     struct vm_device * dev;
 113     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 114     struct vm_device * tmp;
 115
 116     list_for_each_entry_safe(dev, tmp, &(mgr->dev_list), dev_link) {
 117         v3_detach_device(dev);
 118     }
 119
 120     v3_free_htable(mgr->blk_table, 0, 0);
 121     v3_free_htable(mgr->net_table, 0, 0);
 122     v3_free_htable(mgr->char_table, 0, 0);
 123     v3_free_htable(mgr->console_table, 0, 0);
 124
 125     v3_free_htable(mgr->dev_table, 0, 0);
 126
 127     return 0;
 128 }
 129
 130
 131
 132 int v3_create_device(struct v3_vm_info * vm, const char * dev_name, v3_cfg_tree_t * cfg) {
 133     int (*dev_init)(struct v3_vm_info * vm, void * cfg_data);
 134
 135     dev_init = (void *)v3_htable_search(master_dev_table, (addr_t)dev_name);
 136
 137     if (dev_init == NULL) {
 138         PrintError("Could not find device %s in master device table\n", dev_name);
 139         return -1;
 140     }
 141
 142
 143     if (dev_init(vm, cfg) == -1) {
 144         PrintError("Could not initialize Device %s\n", dev_name);
 145         return -1;
 146     }
 147
 148     return 0;
 149 }
 150
 151
 152 void v3_free_device(struct vm_device * dev) {
 153     V3_Free(dev);
 154 }
 155
 156
 157
 158 struct vm_device * v3_find_dev(struct v3_vm_info * vm, const char * dev_name) {
 159     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 160
 161     if (!dev_name) {
 162         return NULL;
 163     }
 164
 165     return (struct vm_device *)v3_htable_search(mgr->dev_table, (addr_t)dev_name);
 166 }
 167
 168
 169 /****************************************************************/
 170 /* The remaining functions are called by the devices themselves */
 171 /****************************************************************/
 172
 173 struct dev_io_hook {
 174     uint16_t port;
 175
 176     struct list_head node;
 177
 178 };
 179
 180 /* IO HOOKS */
 181 int v3_dev_hook_io(struct vm_device * dev, uint16_t port,
 182                    int (*read)(struct guest_info * core, uint16_t port, void * dst, uint_t length, void * priv_data),
 183                    int (*write)(struct guest_info * core, uint16_t port, void * src, uint_t length, void * priv_data)) {
 184     struct dev_io_hook * io_hook = NULL;
 185     int ret = 0;
 186
 187    ret = v3_hook_io_port(dev->vm, port,
 188                          (int (*)(struct guest_info * core, ushort_t, void *, uint_t, void *))read,
 189                          (int (*)(struct guest_info * core, ushort_t, void *, uint_t, void *))write,
 190                          (void *)dev->private_data);
 191
 192    if (ret == -1) {
 193        return -1;
 194    }
 195
 196    io_hook = V3_Malloc(sizeof(struct dev_io_hook));
 197
 198    if (io_hook == NULL) {
 199        PrintError("Could not allocate io hook dev state\n");
 200        return -1;
 201    }
 202
 203    io_hook->port = port;
 204    list_add(&(io_hook->node), &(dev->io_hooks));
 205
 206    return 0;
 207 }
 208
 209
 210 int v3_dev_unhook_io(struct vm_device * dev, uint16_t port) {
 211     struct dev_io_hook * io_hook = NULL;
 212     struct dev_io_hook * tmp;
 213
 214     list_for_each_entry_safe(io_hook, tmp, &(dev->io_hooks), node) {
 215         if (io_hook->port == port) {
 216
 217             list_del(&(io_hook->node));
 218             V3_Free(io_hook);
 219
 220             return v3_unhook_io_port(dev->vm, port);
 221         }
 222     }
 223
 224     return -1;
 225 }
 226
 227
 228
 229 int v3_detach_device(struct vm_device * dev) {
 230     struct vmm_dev_mgr * mgr = &(dev->vm->dev_mgr);
 231
 232     if (dev->ops->free) {
 233         dev->ops->free(dev);
 234     } else {
 235         PrintError("Error: %s free() not implemented\n",  dev->name);
 236     }
 237
 238     list_del(&(dev->dev_link));
 239     mgr->num_devs--;
 240
 241     dev->vm = NULL;
 242
 243     v3_free_device(dev);
 244     return -1;
 245 }
 246
 247
 248 struct vm_device * v3_allocate_device(char * name,
 249                                       struct v3_device_ops * ops,
 250                                       void * private_data) {
 251     struct vm_device * dev = NULL;
 252
 253     dev = (struct vm_device*)V3_Malloc(sizeof(struct vm_device));
 254
 255     INIT_LIST_HEAD(&(dev->io_hooks));
 256
 257     strncpy(dev->name, name, 32);
 258     dev->ops = ops;
 259     dev->private_data = private_data;
 260
 261     dev->vm = NULL;
 262
 263     return dev;
 264 }
 265
 266
 267 int v3_attach_device(struct v3_vm_info * vm, struct vm_device * dev ) {
 268     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 269
 270     dev->vm = vm;
 271
 272     list_add(&(dev->dev_link), &(mgr->dev_list));
 273     mgr->num_devs++;
 274
 275
 276     v3_htable_insert(mgr->dev_table, (addr_t)(dev->name), (addr_t)dev);
 277
 278     return 0;
 279 }
 280
 281
 282
 283 void v3_print_dev_mgr(struct v3_vm_info * vm) {
 284     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 285     struct vm_device * dev;
 286
 287     V3_Print("%d devices registered with manager\n", mgr->num_devs);
 288
 289     list_for_each_entry(dev, &(mgr->dev_list), dev_link) {
 290         V3_Print("Device: %s\n", dev->name);
 291     }
 292
 293     return;
 294 }
 295
 296
 297
 298
 299 struct blk_frontend {
 300     int (*connect)(struct v3_vm_info * vm,
 301                     void * frontend_data,
 302                     struct v3_dev_blk_ops * ops,
 303                     v3_cfg_tree_t * cfg,
 304                     void * priv_data);
 305
 306
 307     struct list_head blk_node;
 308
 309     void * priv_data;
 310 };
 311
 312
 313
 314 int v3_dev_add_blk_frontend(struct v3_vm_info * vm,
 315                             char * name,
 316                             int (*connect)(struct v3_vm_info * vm,
 317                                             void * frontend_data,
 318                                             struct v3_dev_blk_ops * ops,
 319                                             v3_cfg_tree_t * cfg,
 320                                             void * priv_data),
 321                             void * priv_data) {
 322
 323     struct blk_frontend * frontend = NULL;
 324
 325     frontend = (struct blk_frontend *)V3_Malloc(sizeof(struct blk_frontend));
 326     memset(frontend, 0, sizeof(struct blk_frontend));
 327
 328     frontend->connect = connect;
 329     frontend->priv_data = priv_data;
 330
 331     list_add(&(frontend->blk_node), &(vm->dev_mgr.blk_list));
 332     v3_htable_insert(vm->dev_mgr.blk_table, (addr_t)(name), (addr_t)frontend);
 333
 334     return 0;
 335 }
 336
 337 int v3_dev_connect_blk(struct v3_vm_info * vm,
 338                        char * frontend_name,
 339                        struct v3_dev_blk_ops * ops,
 340                        v3_cfg_tree_t * cfg,
 341                        void * private_data) {
 342
 343     struct blk_frontend * frontend = NULL;
 344
 345     frontend = (struct blk_frontend *)v3_htable_search(vm->dev_mgr.blk_table,
 346                                                        (addr_t)frontend_name);
 347
 348     if (frontend == NULL) {
 349         PrintError("Could not find frontend blk device %s\n", frontend_name);
 350         return 0;
 351     }
 352
 353     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 354         PrintError("Error connecting to block frontend %s\n", frontend_name);
 355         return -1;
 356     }
 357
 358     return 0;
 359 }
 360
 361
 362
 363 struct net_frontend {
 364     int (*connect)(struct v3_vm_info * vm,
 365                     void * frontend_data,
 366                     struct v3_dev_net_ops * ops,
 367                     v3_cfg_tree_t * cfg,
 368                     void * priv_data);
 369
 370
 371     struct list_head net_node;
 372
 373     void * priv_data;
 374 };
 375
 376
 377 int v3_dev_add_net_frontend(struct v3_vm_info * vm,
 378                             char * name,
 379                             int (*connect)(struct v3_vm_info * vm,
 380                                             void * frontend_data,
 381                                             struct v3_dev_net_ops * ops,
 382                                             v3_cfg_tree_t * cfg,
 383                                             void * private_data),
 384                             void * priv_data)
 385 {
 386     struct net_frontend * frontend = NULL;
 387
 388     frontend = (struct net_frontend *)V3_Malloc(sizeof(struct net_frontend));
 389     memset(frontend, 0, sizeof(struct net_frontend));
 390
 391     frontend->connect = connect;
 392     frontend->priv_data = priv_data;
 393
 394     list_add(&(frontend->net_node), &(vm->dev_mgr.net_list));
 395     v3_htable_insert(vm->dev_mgr.net_table, (addr_t)(name), (addr_t)frontend);
 396
 397     return 0;
 398 }
 399
 400
 401 int v3_dev_connect_net(struct v3_vm_info * vm,
 402                        char * frontend_name,
 403                        struct v3_dev_net_ops * ops,
 404                        v3_cfg_tree_t * cfg,
 405                        void * private_data)
 406 {
 407     struct net_frontend * frontend = NULL;
 408
 409     frontend = (struct net_frontend *)v3_htable_search(vm->dev_mgr.net_table,
 410                                                        (addr_t)frontend_name);
 411
 412     if (frontend == NULL) {
 413         PrintError("Could not find frontend net device %s\n", frontend_name);
 414         return 0;
 415     }
 416
 417     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 418         PrintError("Error connecting to net frontend %s\n", frontend_name);
 419         return -1;
 420     }
 421
 422     return 0;
 423 }
 424
 425
 426 struct char_frontend {
 427     int (*connect)(struct v3_vm_info * vm,
 428                    void * frontend_data,
 429                    struct v3_dev_char_ops * ops,
 430                    v3_cfg_tree_t * cfg,
 431                    void * priv_data,
 432                    void ** push_fn_arg);
 433
 434
 435     struct list_head char_node;
 436
 437     void * priv_data;
 438 };
 439
 440
 441
 442 int v3_dev_add_char_frontend(struct v3_vm_info * vm,
 443                              char * name,
 444                              int (*connect)(struct v3_vm_info * vm,
 445                                             void * frontend_data,
 446                                             struct v3_dev_char_ops * ops,
 447                                             v3_cfg_tree_t * cfg,
 448                                             void * private_data,
 449                                             void ** push_fn_arg),
 450                              void * priv_data)
 451 {
 452     struct char_frontend * frontend = NULL;
 453
 454     frontend = (struct char_frontend *)V3_Malloc(sizeof(struct char_frontend));
 455     memset(frontend, 0, sizeof(struct char_frontend));
 456
 457     frontend->connect = connect;
 458     frontend->priv_data = priv_data;
 459
 460     list_add(&(frontend->char_node), &(vm->dev_mgr.char_list));
 461     v3_htable_insert(vm->dev_mgr.char_table, (addr_t)(name), (addr_t)frontend);
 462
 463     return 0;
 464 }
 465
 466
 467 int v3_dev_connect_char(struct v3_vm_info * vm,
 468                         char * frontend_name,
 469                         struct v3_dev_char_ops * ops,
 470                         v3_cfg_tree_t * cfg,
 471                         void * private_data,
 472                         void ** push_fn_arg)
 473 {
 474     struct char_frontend * frontend = NULL;
 475
 476     frontend = (struct char_frontend *)v3_htable_search(vm->dev_mgr.char_table,
 477                                                         (addr_t)frontend_name);
 478
 479     if (frontend == NULL) {
 480         PrintError("Could not find frontend char device %s\n", frontend_name);
 481         return 0;
 482     }
 483
 484     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data, push_fn_arg) == -1) {
 485         PrintError("Error connecting to char frontend %s\n", frontend_name);
 486         return -1;
 487     }
 488
 489     return 0;
 490 }
 491