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