KernelLand/Modules/Interfaces/UDI/management_agent.c

   1 /*
   2  * Acess2 UDI Layer
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * management_agent.c
   6  * - Managment Agent
   7  */
   8 #define DEBUG   1
   9 #include <udi.h>
  10 #include <acess.h>
  11 #include <udi_internal.h>
  12 #include <udi_internal_ma.h>
  13
  14 // === CONSTANTS ===
  15
  16 // === PROTOTYPES ===
  17
  18 // === GLOBALS ===
  19 tUDI_DriverInstance     *gpUDI_ActiveInstances;
  20
  21 // === CODE ===
  22 tUDI_DriverInstance *UDI_MA_CreateInstance(tUDI_DriverModule *DriverModule,
  23         tUDI_DriverInstance *ParentInstance, tUDI_ChildBinding *ChildBinding)
  24 {
  25         tUDI_DriverInstance     *inst = NEW_wA(tUDI_DriverInstance, Regions, DriverModule->nRegions);
  26         udi_primary_init_t      *pri_init = DriverModule->InitInfo->primary_init_info;
  27         inst->Module = DriverModule;
  28         inst->Regions[0] = UDI_MA_InitRegion(inst, 0, 0, pri_init->rdata_size);
  29         udi_secondary_init_t    *sec_init = DriverModule->InitInfo->secondary_init_list;
  30         if( sec_init )
  31         {
  32                 for( int i = 0; sec_init[i].region_idx; i ++ )
  33                 {
  34                         inst->Regions[1+i] = UDI_MA_InitRegion(inst, i,
  35                                 sec_init[i].region_idx, sec_init[i].rdata_size);
  36                 }
  37         }
  38
  39         if( ParentInstance ) {
  40                 ASSERT(ChildBinding);
  41                 ChildBinding->BoundInstance = inst;
  42         }
  43         inst->Parent = ParentInstance;
  44         inst->ParentChildBinding = ChildBinding;
  45
  46         inst->ManagementChannel = UDI_CreateChannel_Blank(&cMetaLang_Management);
  47         UDI_BindChannel_Raw(inst->ManagementChannel, true,
  48                 inst, 0, 0, inst->Regions[0]->InitContext, pri_init->mgmt_ops);
  49 //      UDI_BindChannel_Raw(inst->ManagementChannel, false,
  50 //              NULL, 1, inst, &cUDI_MgmtOpsList);      // TODO: ops list for management agent?
  51
  52         for( int i = 0; i < DriverModule->nRegions; i ++ )
  53                 Log("Rgn %i: %p", i, inst->Regions[i]);
  54
  55         inst->CurState = UDI_MASTATE_USAGEIND;
  56         // Next State: _SECBIND
  57
  58         // Add to global list of active instances
  59         inst->Next = gpUDI_ActiveInstances;
  60         gpUDI_ActiveInstances = inst;
  61
  62         // Send usage indication
  63         udi_usage_cb_t *cb = (void*)udi_cb_alloc_internal_v(&cMetaLang_Management, UDI_MGMT_USAGE_CB_NUM,
  64                 0, pri_init->mgmt_scratch_requirement, inst->ManagementChannel
  65                 );
  66         UDI_GCB(cb)->initiator_context = inst;
  67         udi_usage_ind(cb, UDI_RESOURCES_NORMAL);
  68         // udi_usage_res causes next state transition
  69
  70         return inst;
  71 }
  72
  73 tUDI_DriverRegion *UDI_MA_InitRegion(tUDI_DriverInstance *Inst,
  74         udi_ubit16_t Index, udi_ubit16_t Type, size_t RDataSize)
  75 {
  76 //      ASSERTCR( RDataSize, <=, UDI_MIN_ALLOC_LIMIT, NULL );
  77         ASSERTCR( RDataSize, >=, sizeof(udi_init_context_t), NULL );
  78         tUDI_DriverRegion       *rgn = NEW(tUDI_DriverRegion,+RDataSize);
  79         rgn->InitContext = (void*)(rgn+1);
  80         rgn->InitContext->region_idx = Type;
  81 //      rgn->InitContext->limits
  82         return rgn;
  83 }
  84
  85 void UDI_MA_BeginEnumeration(tUDI_DriverInstance *Inst)
  86 {
  87         udi_primary_init_t *pri_init = Inst->Module->InitInfo->primary_init_info;
  88         udi_enumerate_cb_t      *ecb = (void*)udi_cb_alloc_internal_v(
  89                 &cMetaLang_Management, UDI_MGMT_ENUMERATE_CB_NUM,
  90                 0, pri_init->mgmt_scratch_requirement, Inst->ManagementChannel);
  91         UDI_GCB(ecb)->initiator_context = Inst;
  92         ecb->child_data = malloc(pri_init->child_data_size);
  93         ecb->attr_list = NEW(udi_instance_attr_list_t, *pri_init->enumeration_attr_list_length);
  94         ecb->attr_valid_length = 0;
  95         udi_enumerate_req(ecb, UDI_ENUMERATE_START);
  96         Threads_Yield();        // Yield to allow udi_enumerate_req to run
  97 }
  98
  99 /*
 100  * Returns number of matching attributes
 101  * If an attribute differs, returns 0
 102  */
 103 int UDI_MA_CheckDeviceMatch(int nDevAttr, udi_instance_attr_list_t *DevAttrs,
 104         int nEnumAttr, udi_instance_attr_list_t *EnumAttrs)
 105 {
 106         // TODO: Ask metalangauge instead
 107         int n_matches = 0;
 108         for( int i = 0; i < nDevAttr; i ++ )
 109         {
 110                 udi_instance_attr_list_t *dev_attr = &DevAttrs[i];
 111                 udi_instance_attr_list_t *enum_attr = NULL;
 112                 for( int j = 0; j < nEnumAttr; j ++ )
 113                 {
 114                         if( strcmp(dev_attr->attr_name, EnumAttrs[j].attr_name) == 0 ) {
 115                                 enum_attr = &EnumAttrs[j];
 116                                 break;
 117                         }
 118                 }
 119                 if( enum_attr )
 120                 {
 121                         //LOG("Match = '%s' (%i %x == %i %x)",
 122                         //      dev_attr->attr_name,
 123                         //      dev_attr->attr_length, UDI_ATTR32_GET(dev_attr->attr_value),
 124                         //      enum_attr->attr_length, UDI_ATTR32_GET(enum_attr->attr_value)
 125                         //      );
 126                         if( enum_attr->attr_length != dev_attr->attr_length )
 127                                 return 0;
 128                         if( memcmp(enum_attr->attr_value, dev_attr->attr_value, dev_attr->attr_length) != 0 )
 129                                 return 0;
 130                         n_matches ++;
 131                 }
 132                 else
 133                 {
 134                         // Attribute desired is missing, error?
 135                         //LOG("attr '%s' missing", dev_attr->attr_name);
 136                 }
 137         }
 138         //LOG("n_matches = %i", n_matches);
 139         return n_matches;
 140 }
 141
 142 void UDI_MA_AddChild(udi_enumerate_cb_t *cb, udi_index_t ops_idx)
 143 {
 144         // Current side is MA, other is instance
 145         // TODO: Get region index too?
 146         tUDI_DriverInstance *inst = UDI_int_ChannelGetInstance( UDI_GCB(cb), true, NULL );
 147         //LOG("inst = %p", inst);
 148
 149         // Search for existing child with same child_ID and ops
 150         for( tUDI_ChildBinding *child = inst->FirstChild; child; child = child->Next )
 151         {
 152                 if( child->ChildID == cb->child_ID && child->Ops->ops_idx == ops_idx ) {
 153                         LOG("duplicate, not creating");
 154                         return;
 155                 }
 156         }
 157
 158         // Create a new child
 159         tUDI_ChildBinding *child = NEW_wA(tUDI_ChildBinding, Attribs, cb->attr_valid_length);
 160         child->Next = NULL;
 161         child->ChildID = cb->child_ID;
 162         child->Ops = UDI_int_GetOps(inst, ops_idx);
 163         child->BoundInstance = NULL;    // currently unbound
 164         child->BindOps = NULL;
 165         child->nAttribs = cb->attr_valid_length;
 166         memcpy(child->Attribs, cb->attr_list, sizeof(cb->attr_list[0])*cb->attr_valid_length);
 167
 168         // - Locate child_bind_ops definition
 169         for( int i = 0; i < inst->Module->nChildBindOps; i ++ )
 170         {
 171                 if( inst->Module->ChildBindOps[i].ops_idx == ops_idx ) {
 172                         child->BindOps = &inst->Module->ChildBindOps[i];
 173                         break;
 174                 }
 175         }
 176         if( !child->BindOps ) {
 177                 Log_Error("UDI", "Driver '%s' doesn't have a 'child_bind_ops' for %i",
 178                         inst->Module->ModuleName, ops_idx);
 179                 free(child);
 180                 return ;
 181         }
 182
 183         child->Next = inst->FirstChild;
 184         inst->FirstChild = child;
 185
 186         // and search for a handler
 187         tUDI_MetaLang   *metalang = UDI_int_GetMetaLang(inst, child->Ops->meta_idx);
 188          int    best_level = 0;
 189         tUDI_DriverModule *best_module = NULL;
 190         for( tUDI_DriverModule *module = gpUDI_LoadedModules; module; module = module->Next )
 191         {
 192                 for( int i = 0; i < module->nDevices; i ++ )
 193                 {
 194                         if( module->Devices[i]->Metalang != metalang )
 195                                 continue ;
 196
 197                         int level = UDI_MA_CheckDeviceMatch(
 198                                 module->Devices[i]->nAttribs, module->Devices[i]->Attribs,
 199                                 child->nAttribs, child->Attribs
 200                                 );
 201                         if( level > best_level ) {
 202                                 best_level = level;
 203                                 best_module = module;
 204                         }
 205                 }
 206         }
 207         if( best_module != NULL )
 208         {
 209                 UDI_MA_CreateInstance(best_module, inst, child);
 210         }
 211 }
 212
 213 void UDI_MA_BindParents(tUDI_DriverModule *Module)
 214 {
 215         // Scan active instances for enumerated children that can be handled by this module
 216         for( int i = 0; i < Module->nDevices; i ++ )
 217         {
 218                 // TODO: Have list of unbound enumerated children
 219                 for( tUDI_DriverInstance *inst = gpUDI_ActiveInstances; inst; inst = inst->Next )
 220                 {
 221                         // Loop children
 222                         for( tUDI_ChildBinding *child = inst->FirstChild; child; child = child->Next )
 223                         {
 224                                 if( child->BoundInstance )
 225                                         continue ;
 226                                 // Check for match
 227                                 int level = UDI_MA_CheckDeviceMatch(
 228                                         Module->Devices[i]->nAttribs, Module->Devices[i]->Attribs,
 229                                         child->nAttribs, child->Attribs
 230                                         );
 231                                 // No match: Continue
 232                                 if( level == 0 )
 233                                         continue ;
 234                                 // Found a match, so create an instance (binding happens async)
 235                                 UDI_MA_CreateInstance(Module, inst, child);
 236                         }
 237                 }
 238         }
 239 }
 240
 241 void UDI_MA_TransitionState(tUDI_DriverInstance *Inst, enum eUDI_MAState Src, enum eUDI_MAState Dst)
 242 {
 243         ASSERT(Inst);
 244         if( Inst->CurState != Src )
 245                 return ;
 246
 247         switch(Dst)
 248         {
 249         case UDI_MASTATE_USAGEIND:
 250                 ASSERT(Dst != UDI_MASTATE_USAGEIND);
 251                 break;
 252         case UDI_MASTATE_SECBIND:
 253                 Inst->CurState = UDI_MASTATE_SECBIND;
 254                 for( int i = 1; i < Inst->Module->nRegions; i ++ )
 255                 {
 256                         // TODO: Bind secondaries to primary
 257                         Log_Warning("UDI", "TODO: Bind secondary channels");
 258                         //inst->Regions[i]->PriChannel = UDI_CreateChannel_Blank(
 259                 }
 260                 //UDI_MA_TransitionState(Inst, UDI_MASTATE_SECBIND, UDI_MASTATE_PARENTBIND);
 261                 //break;
 262         case UDI_MASTATE_PARENTBIND:
 263                 Inst->CurState = UDI_MASTATE_PARENTBIND;
 264                 if( Inst->Parent )
 265                 {
 266                         tUDI_DriverModule       *Module = Inst->Module;
 267                         tUDI_ChildBinding       *parent_bind = Inst->ParentChildBinding;
 268                         // TODO: Handle multi-parent drivers
 269                         ASSERTC(Module->nParents, ==, 1);
 270
 271                         // Bind to parent
 272                         tUDI_BindOps    *parent = &Module->Parents[0];
 273                         udi_channel_t channel = UDI_CreateChannel_Blank(UDI_int_GetMetaLang(Inst, parent->meta_idx));
 274
 275                         UDI_BindChannel(channel,true,  Inst, parent->ops_idx, parent->region_idx, NULL,false,0);
 276                         UDI_BindChannel(channel,false,
 277                                 Inst->Parent, parent_bind->Ops->ops_idx, parent_bind->BindOps->region_idx,
 278                                 NULL, true, parent_bind->ChildID);
 279
 280                         udi_cb_t        *bind_cb;
 281                         if( parent->bind_cb_idx == 0 )
 282                                 bind_cb = NULL;
 283                         else {
 284                                 bind_cb = udi_cb_alloc_internal(Inst, parent->bind_cb_idx, channel);
 285                                 if( !bind_cb ) {
 286                                         Log_Warning("UDI", "Bind CB index is invalid");
 287                                         break;
 288                                 }
 289                                 UDI_int_ChannelFlip( bind_cb );
 290                         }
 291
 292                          int    n_handles = Module->InitInfo->primary_init_info->per_parent_paths;
 293                         udi_buf_path_t  handles[n_handles];
 294                         for( int i = 0; i < n_handles; i ++ ) {
 295                                 //handles[i] = udi_buf_path_alloc_internal(Inst);
 296                                 handles[i] = 0;
 297                         }
 298
 299                         udi_channel_event_cb_t *ev_cb = (void*)udi_cb_alloc_internal_v(&cMetaLang_Management,
 300                                 UDI_MGMT_CHANNEL_EVENT_CB_NUM, 0, 0, channel);
 301                         UDI_GCB(ev_cb)->initiator_context = Inst;
 302                         ev_cb->event = UDI_CHANNEL_BOUND;
 303                         ev_cb->params.parent_bound.bind_cb = bind_cb;
 304                         ev_cb->params.parent_bound.parent_ID = 1;
 305                         ev_cb->params.parent_bound.path_handles = handles;
 306
 307                         udi_channel_event_ind(ev_cb);
 308                         break;
 309                 }
 310                 //UDI_MA_TransitionState(Inst, UDI_MASTATE_PARENTBIND, UDI_MASTATE_ENUMCHILDREN);
 311                 //break;
 312         case UDI_MASTATE_ENUMCHILDREN:
 313                 Inst->CurState = UDI_MASTATE_ENUMCHILDREN;
 314                 UDI_MA_BeginEnumeration(Inst);
 315                 break;
 316         case UDI_MASTATE_ACTIVE:
 317                 Inst->CurState = UDI_MASTATE_ACTIVE;
 318                 Log_Log("UDI", "Driver instance %s %p entered active state",
 319                         Inst->Module->ModuleName, Inst);
 320                 break;
 321         }
 322 }
 323