src/rm_services.c

   1 /**
   2  *   @file  rm_services.c
   3  *
   4  *   @brief
   5  *      This is the Resource Manager services source.
   6  *
   7  *  \par
   8  *  ============================================================================
   9  *  @n   (C) Copyright 2012-2013, Texas Instruments, Inc.
  10  *
  11  *  Redistribution and use in source and binary forms, with or without
  12  *  modification, are permitted provided that the following conditions
  13  *  are met:
  14  *
  15  *    Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  *
  18  *    Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the
  21  *    distribution.
  22  *
  23  *    Neither the name of Texas Instruments Incorporated nor the names of
  24  *    its contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  30  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  32  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  33  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  34  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  35  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  36  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  37  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38  *
  39  *  \par
  40 */
  41
  42 /* Standard includes */
  43 #include <string.h>
  44
  45 /* RM external API includes */
  46 #include <ti/drv/rm/rm.h>
  47 #include <ti/drv/rm/rm_services.h>
  48
  49 /* RM internal API includes */
  50 #include <ti/drv/rm/include/rm_loc.h>
  51
  52 /* RM OSAL layer */
  53 #include <rm_osal.h>
  54
  55 /**********************************************************************
  56  ********************** Internal Functions ****************************
  57  **********************************************************************/
  58
  59 /* FUNCTION PURPOSE: Internal Callback to unblock RM instance
  60  ***********************************************************************
  61  * DESCRIPTION: Internal callback function executed when the result
  62  *              of a service request has been received from a remote
  63  *              instance.  The original service request did not specify
  64  *              a callback function so the Rm_serviceHandler is blocked
  65  *              waiting for the response.  This function unblocks the
  66  *              Rm_serviceHandler to return the response to the
  67  *              application.
  68  */
  69 void rmServiceInternalCallback(Rm_Handle rmHandle)
  70 {
  71     Rm_Inst *rmInst = (Rm_Inst *)rmHandle;
  72
  73     /* Unblock so Rm_serviceHandler can provide response to application */
  74     Rm_osalTaskUnblock(rmInst->blockHandle);
  75 }
  76
  77 /**********************************************************************
  78  ********************** Application visible APIs **********************
  79  **********************************************************************/
  80
  81 /* FUNCTION PURPOSE: Handles application component service requests
  82  ***********************************************************************
  83  * DESCRIPTION: Receives service requests from application components
  84  *              and routes them to the transaction processor.  If
  85  *              the service can be handled immediately the response
  86  *              will be provided in the service response.  If the
  87  *              service requires a blocking operation the handler
  88  *              will provide a service ID back to the application.
  89  *              The response will be sent at a later time via the
  90  *              application supplied callback function.
  91  */
  92 void Rm_serviceHandler (void *rmHandle, const Rm_ServiceReqInfo *serviceRequest,
  93                         Rm_ServiceRespInfo *serviceResponse)
  94 {
  95     Rm_Inst        *rmInst = (Rm_Inst *)rmHandle;
  96     char           *instanceName;
  97     Rm_Transaction *transaction;
  98     void           *key;
  99
 100     RM_SS_INST_INV_ENTER_CS(key);
 101     RM_SC_INST_INV_ENTER_CS(key);
 102
 103     if (rmInst->isLocked) {
 104         serviceResponse->serviceState = RM_SERVICE_DENIED_RM_INSTANCE_LOCKED;
 105         return;
 106     }
 107
 108     if (serviceRequest->type >= Rm_service_LAST) {
 109         serviceResponse->serviceState = RM_ERROR_INVALID_SERVICE_TYPE;
 110         return;
 111     }
 112
 113     /* Copy location of instance name to local variable in case Shared Client needs to
 114      * transfer control to a shared server */
 115     instanceName = rmInst->instName;
 116     if (rmInst->instType == Rm_instType_SHARED_CLIENT) {
 117         /* Transfer control to shared server instance */
 118         rmInst = rmInst->u.sharedClient.sharedServerHandle;
 119     }
 120
 121     transaction = rmTransactionQueueAdd(rmInst);
 122     if (transaction) {
 123         transaction->type = serviceRequest->type;
 124         strncpy(transaction->serviceSrcInstName, instanceName, RM_NAME_MAX_CHARS);
 125         transaction->u.callback.serviceCallback = serviceRequest->callback.serviceCallback;
 126         transaction->state = RM_SERVICE_PROCESSING;
 127         if (serviceRequest->resourceName) {
 128             strncpy(transaction->resourceInfo.name, serviceRequest->resourceName, RM_NAME_MAX_CHARS);
 129         }
 130         transaction->resourceInfo.base = serviceRequest->resourceBase;
 131         transaction->resourceInfo.length = serviceRequest->resourceLength;
 132         transaction->resourceInfo.alignment = serviceRequest->resourceAlignment;
 133         transaction->resourceInfo.ownerCount = RM_RESOURCE_NUM_OWNERS_INVALID;
 134         if (serviceRequest->resourceNsName) {
 135             strncpy(transaction->resourceInfo.nameServerName, serviceRequest->resourceNsName, RM_NAME_MAX_CHARS);
 136         }
 137
 138         /* Process received transaction */
 139         rmProcessRouter(rmInst, transaction);
 140
 141         memset((void *)serviceResponse, 0, sizeof(*serviceResponse));
 142
 143         if ((rmInst->instType == Rm_instType_SHARED_SERVER) &&
 144             (transaction->state == RM_SERVICE_PROCESSING)) {
 145             /* Shared Server should always return a fully processed transaction */
 146             serviceResponse->serviceState = RM_ERROR_SHARED_INSTANCE_UNFINISHED_REQ;
 147             rmTransactionQueueDelete(rmInst, transaction->localId);
 148         }
 149         else {
 150             if ((transaction->state == RM_SERVICE_PROCESSING) &&
 151                 (transaction->u.callback.serviceCallback == NULL)) {
 152                 /* Block until response is received.  Response will be received in transaction. */
 153                 Rm_osalTaskBlock(rmInst->blockHandle);
 154             }
 155
 156             serviceResponse->rmHandle = rmHandle;
 157             serviceResponse->serviceState = transaction->state;
 158             /* Owner count will only be set within RM under certain circumstances.  Most of time
 159              * it will be RM_RESOURCE_NUM_OWNERS_INVALID */
 160             serviceResponse->resourceNumOwners = transaction->resourceInfo.ownerCount;
 161             if ((serviceResponse->serviceState == RM_SERVICE_PROCESSING) ||
 162                 (serviceResponse->serviceState == RM_SERVICE_APPROVED_STATIC) ||
 163                 (serviceResponse->serviceState == RM_SERVICE_PENDING_SERVER_RESPONSE)) {
 164                 /* Service still being processed.  Static requests will have their validation responses sent once
 165                  * all transports have been established.  Provide transaction ID back to component so it can sort
 166                  * service responses received via callback function */
 167                 serviceResponse->serviceId = transaction->localId;
 168             }
 169
 170             if ((serviceResponse->serviceState == RM_SERVICE_APPROVED) ||
 171                 (serviceResponse->serviceState == RM_SERVICE_APPROVED_STATIC)) {
 172                 strncpy(serviceResponse->resourceName, transaction->resourceInfo.name, RM_NAME_MAX_CHARS);
 173                 serviceResponse->resourceBase = transaction->resourceInfo.base;
 174                 serviceResponse->resourceLength = transaction->resourceInfo.length;
 175             }
 176
 177             /* Transactions still processing not deleted from queue including static transactions which will be
 178              * verified once all transports are up */
 179             if ((serviceResponse->serviceState != RM_SERVICE_PROCESSING) &&
 180                 (serviceResponse->serviceState != RM_SERVICE_APPROVED_STATIC) &&
 181                 (serviceResponse->serviceState != RM_SERVICE_PENDING_SERVER_RESPONSE)) {
 182                 rmTransactionQueueDelete(rmInst, transaction->localId);
 183             }
 184         }
 185     }
 186     else {
 187         serviceResponse->serviceState = RM_ERROR_SERVICE_TRANS_NOT_CREATED;
 188     }
 189     RM_SS_INST_WB_EXIT_CS(key);
 190     return;
 191 }
 192
 193 /* FUNCTION PURPOSE: Opens the RM instance service handle
 194  ***********************************************************************
 195  * DESCRIPTION: Returns the service handle for an RM instance.  Only
 196  *              one service handle is opened per instance.
 197  */
 198 Rm_ServiceHandle *Rm_serviceOpenHandle(Rm_Handle rmHandle, int32_t *result)
 199 {
 200     Rm_Inst          *rmInst = (Rm_Inst *)rmHandle;
 201     Rm_ServiceHandle *serviceHandle = NULL;
 202     void             *key;
 203
 204     RM_SS_INST_INV_ENTER_CS(key);
 205
 206     *result = RM_OK;
 207
 208     serviceHandle = rmInst->serviceHandle;
 209     if (serviceHandle == NULL) {
 210         serviceHandle = Rm_osalMalloc(sizeof(*serviceHandle));
 211         if (serviceHandle) {
 212             serviceHandle->rmHandle = rmHandle;
 213             serviceHandle->Rm_serviceHandler = Rm_serviceHandler;
 214             RM_SS_OBJ_WB(serviceHandle, Rm_ServiceHandle);
 215             rmInst->serviceHandle = serviceHandle;
 216         }
 217         else {
 218             *result = RM_ERROR_SERVICE_HANDLE_MEM_ALLOC_FAILED;
 219         }
 220     }
 221     RM_SS_INST_WB_EXIT_CS(key);
 222     return (serviceHandle);
 223 }
 224
 225 /* FUNCTION PURPOSE: Closes the RM instance service handle
 226  ***********************************************************************
 227  * DESCRIPTION: Closes the service handle for an RM instance.
 228  */
 229 int32_t Rm_serviceCloseHandle(Rm_ServiceHandle *rmServiceHandle)
 230 {
 231     Rm_Inst *rmInst = (Rm_Inst *)rmServiceHandle->rmHandle;
 232     int32_t  retVal = RM_OK;
 233     void    *key;
 234
 235     RM_SS_INST_INV_ENTER_CS(key);
 236
 237     if (rmInst->serviceHandle) {
 238         Rm_osalFree((void *)rmServiceHandle, sizeof(*rmServiceHandle));
 239         rmInst->serviceHandle = NULL;
 240     }
 241     else {
 242         retVal = RM_ERROR_SERVICE_HANDLE_ALREADY_CLOSED;
 243     }
 244     RM_SS_INST_WB_EXIT_CS(key);
 245     return(retVal);
 246 }
 247