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->console_list));
 100
 101     mgr->blk_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 102     mgr->net_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 103     mgr->console_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 104
 105     return 0;
 106 }
 107
 108
 109 int v3_dev_mgr_deinit(struct v3_vm_info * vm) {
 110     struct vm_device * dev;
 111     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 112     struct vm_device * tmp;
 113
 114     list_for_each_entry_safe(dev, tmp, &(mgr->dev_list), dev_link) {
 115         v3_detach_device(dev);
 116         v3_free_device(dev);
 117     }
 118
 119
 120     /* TODO: Clear hash tables */
 121
 122     return 0;
 123 }
 124
 125 /*
 126 int v3_init_core_dev_mgr(struct v3_vm_info * vm) {
 127     struct v3_core_dev_mgr * mgr = &(vm->core_dev_mgr);
 128
 129     INIT_LIST_HEAD(&(mgr->dev_list));
 130     mgr->dev_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 131
 132     return 0;
 133 }
 134
 135 int v3_core_dev_mgr_deinit(struct v3_vm_info * vm) {
 136     struct vm_device * dev;
 137     struct v3_core_dev_mgr * mgr = &(vm->core_dev_mgr);
 138     struct vm_device * tmp;
 139
 140     list_for_each_entry_safe(dev, tmp, &(mgr->dev_list), dev_link) {
 141         v3_detach_device(dev);
 142         v3_free_device(dev);
 143     }
 144
 145     // TODO: Clear hash tables
 146
 147 }
 148 */
 149
 150
 151 int v3_create_device(struct v3_vm_info * vm, const char * dev_name, v3_cfg_tree_t * cfg) {
 152     int (*dev_init)(struct v3_vm_info * vm, void * cfg_data);
 153
 154     dev_init = (void *)v3_htable_search(master_dev_table, (addr_t)dev_name);
 155
 156     if (dev_init == NULL) {
 157         PrintError("Could not find device %s in master device table\n", dev_name);
 158         return -1;
 159     }
 160
 161
 162     if (dev_init(vm, cfg) == -1) {
 163         PrintError("Could not initialize Device %s\n", dev_name);
 164         return -1;
 165     }
 166
 167     return 0;
 168 }
 169
 170
 171 void v3_free_device(struct vm_device * dev) {
 172     V3_Free(dev);
 173 }
 174
 175
 176
 177 struct vm_device * v3_find_dev(struct v3_vm_info * vm, const char * dev_name) {
 178     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 179
 180     if (!dev_name) {
 181         return NULL;
 182     }
 183
 184     return (struct vm_device *)v3_htable_search(mgr->dev_table, (addr_t)dev_name);
 185 }
 186
 187
 188 /****************************************************************/
 189 /* The remaining functions are called by the devices themselves */
 190 /****************************************************************/
 191
 192 /* IO HOOKS */
 193 int v3_dev_hook_io(struct vm_device * dev, uint16_t port,
 194                    int (*read)(struct guest_info * core, uint16_t port, void * dst, uint_t length, struct vm_device * dev),
 195                    int (*write)(struct guest_info * core, uint16_t port, void * src, uint_t length, struct vm_device * dev)) {
 196     return v3_hook_io_port(dev->vm, port,
 197                            (int (*)(struct guest_info * core, ushort_t, void *, uint_t, void *))read,
 198                            (int (*)(struct guest_info * core, ushort_t, void *, uint_t, void *))write,
 199                            (void *)dev);
 200 }
 201
 202
 203 int v3_dev_unhook_io(struct vm_device * dev, uint16_t port) {
 204     return v3_unhook_io_port(dev->vm, port);
 205 }
 206
 207
 208
 209 int v3_detach_device(struct vm_device * dev) {
 210     struct vmm_dev_mgr * mgr = &(dev->vm->dev_mgr);
 211
 212     dev->ops->free(dev);
 213
 214     list_del(&(dev->dev_link));
 215     mgr->num_devs--;
 216
 217     dev->vm = NULL;
 218
 219     return -1;
 220 }
 221
 222
 223 struct vm_device * v3_allocate_device(char * name,
 224                                       struct v3_device_ops * ops,
 225                                       void * private_data) {
 226     struct vm_device * dev = NULL;
 227
 228     dev = (struct vm_device*)V3_Malloc(sizeof(struct vm_device));
 229
 230     strncpy(dev->name, name, 32);
 231     dev->ops = ops;
 232     dev->private_data = private_data;
 233
 234     dev->vm = NULL;
 235
 236     return dev;
 237 }
 238
 239
 240 int v3_attach_device(struct v3_vm_info * vm, struct vm_device * dev ) {
 241     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 242
 243     dev->vm = vm;
 244
 245     list_add(&(dev->dev_link), &(mgr->dev_list));
 246     mgr->num_devs++;
 247
 248
 249     v3_htable_insert(mgr->dev_table, (addr_t)(dev->name), (addr_t)dev);
 250
 251     return 0;
 252 }
 253
 254
 255
 256 void v3_print_dev_mgr(struct v3_vm_info * vm) {
 257     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 258     struct vm_device * dev;
 259
 260     V3_Print("%d devices registered with manager\n", mgr->num_devs);
 261
 262     list_for_each_entry(dev, &(mgr->dev_list), dev_link) {
 263         V3_Print("Device: %s\n", dev->name);
 264     }
 265
 266     return;
 267 }
 268
 269
 270
 271
 272 struct blk_frontend {
 273     int (*connect)(struct v3_vm_info * vm,
 274                     void * frontend_data,
 275                     struct v3_dev_blk_ops * ops,
 276                     v3_cfg_tree_t * cfg,
 277                     void * priv_data);
 278
 279
 280     struct list_head blk_node;
 281
 282     void * priv_data;
 283 };
 284
 285
 286
 287 int v3_dev_add_blk_frontend(struct v3_vm_info * vm,
 288                             char * name,
 289                             int (*connect)(struct v3_vm_info * vm,
 290                                             void * frontend_data,
 291                                             struct v3_dev_blk_ops * ops,
 292                                             v3_cfg_tree_t * cfg,
 293                                             void * priv_data),
 294                             void * priv_data) {
 295
 296     struct blk_frontend * frontend = NULL;
 297
 298     frontend = (struct blk_frontend *)V3_Malloc(sizeof(struct blk_frontend));
 299     memset(frontend, 0, sizeof(struct blk_frontend));
 300
 301     frontend->connect = connect;
 302     frontend->priv_data = priv_data;
 303
 304     list_add(&(frontend->blk_node), &(vm->dev_mgr.blk_list));
 305     v3_htable_insert(vm->dev_mgr.blk_table, (addr_t)(name), (addr_t)frontend);
 306
 307     return 0;
 308 }
 309
 310 int v3_dev_connect_blk(struct v3_vm_info * vm,
 311                        char * frontend_name,
 312                        struct v3_dev_blk_ops * ops,
 313                        v3_cfg_tree_t * cfg,
 314                        void * private_data) {
 315
 316     struct blk_frontend * frontend = NULL;
 317
 318     frontend = (struct blk_frontend *)v3_htable_search(vm->dev_mgr.blk_table,
 319                                                        (addr_t)frontend_name);
 320
 321     if (frontend == NULL) {
 322         PrintError("Could not find frontend blk device %s\n", frontend_name);
 323         return 0;
 324     }
 325
 326     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 327         PrintError("Error connecting to block frontend %s\n", frontend_name);
 328         return -1;
 329     }
 330
 331     return 0;
 332 }
 333
 334
 335
 336 struct net_frontend {
 337     int (*connect)(struct v3_vm_info * vm,
 338                     void * frontend_data,
 339                     struct v3_dev_net_ops * ops,
 340                     v3_cfg_tree_t * cfg,
 341                     void * priv_data);
 342
 343
 344     struct list_head net_node;
 345
 346     void * priv_data;
 347 };
 348
 349
 350 int v3_dev_add_net_frontend(struct v3_vm_info * vm,
 351                             char * name,
 352                             int (*connect)(struct v3_vm_info * vm,
 353                                             void * frontend_data,
 354                                             struct v3_dev_net_ops * ops,
 355                                             v3_cfg_tree_t * cfg,
 356                                             void * private_data),
 357                             void * priv_data)
 358 {
 359     struct net_frontend * frontend = NULL;
 360
 361     frontend = (struct net_frontend *)V3_Malloc(sizeof(struct net_frontend));
 362     memset(frontend, 0, sizeof(struct net_frontend));
 363
 364     frontend->connect = connect;
 365     frontend->priv_data = priv_data;
 366
 367     list_add(&(frontend->net_node), &(vm->dev_mgr.net_list));
 368     v3_htable_insert(vm->dev_mgr.net_table, (addr_t)(name), (addr_t)frontend);
 369
 370     return 0;
 371 }
 372
 373
 374 int v3_dev_connect_net(struct v3_vm_info * vm,
 375                        char * frontend_name,
 376                        struct v3_dev_net_ops * ops,
 377                        v3_cfg_tree_t * cfg,
 378                        void * private_data)
 379 {
 380     struct net_frontend * frontend = NULL;
 381
 382     frontend = (struct net_frontend *)v3_htable_search(vm->dev_mgr.net_table,
 383                                                        (addr_t)frontend_name);
 384
 385     if (frontend == NULL) {
 386         PrintError("Could not find frontend net device %s\n", frontend_name);
 387         return 0;
 388     }
 389
 390     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 391         PrintError("Error connecting to net frontend %s\n", frontend_name);
 392         return -1;
 393     }
 394
 395     return 0;
 396 }
 397