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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/kernel/blockmsghdlr.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <kernel/blockmsghdlr.H>
#include <kernel/block.H>
#include <kernel/pagemgr.H>
#include <kernel/basesegment.H>
MessageHandler::HandleResult BlockReadMsgHdlr::handleResponse(
msg_sys_types_t i_type, void* i_key, task_t* i_task, int i_rc)
{
if (i_rc != 0)
{
// Indicate nothing specific has been done for this response. Request
// default behavior of resume/kill task based on rc.
return UNHANDLED_RC;
}
else
{
// Call the function that attaches PTE and sets the
// sPTE entry to present while updating permissions
// on the sPTE entry of the physical addr.
iv_block->attachSPTE(i_key);
return SUCCESS;
}
}
MessageHandler::HandleResult BlockWriteMsgHdlr::handleResponse(
msg_sys_types_t i_type, void* i_key, task_t* i_task, int i_rc)
{
//Default to indicate nothing specific has been done for this response.
MessageHandler::HandleResult l_result = UNHANDLED_RC;
if (i_rc != 0)
{
//Request default behavior of resume/kill task based on rc.
return l_result;
}
//Find the virtual address to page address mapping to know which page
//address to release since only the virtual address is available on the msg
PageAddrNode* l_paNode = iv_va2paList.find(i_key);
if (l_paNode)
{
l_result = SUCCESS;
//Complete page removal and remove list entry
PageManager::freePage(reinterpret_cast<void*>(l_paNode->pageAddr));
iv_va2paList.erase(l_paNode);
delete l_paNode;
}
//Not handling a response from kernel
if (i_task != NULL)
{
//Find the task's msg count to know how many messages were sent
//to remove pages and whether to continue deferring the task or not
TaskMsgNode* l_tmNode = iv_msgGrpList.find(i_task);
if (l_tmNode)
{
//Last message for the given task
if (l_tmNode->msgCount == 1)
{
l_result = SUCCESS;
iv_msgGrpList.erase(l_tmNode);
delete l_tmNode;
}
else
{
l_result = CONTINUE_DEFER;
l_tmNode->msgCount--;
}
}
}
return l_result;
}
void BlockWriteMsgHdlr::incMsgCount(task_t* i_task)
{
TaskMsgNode* l_tmNode = iv_msgGrpList.find(i_task);
if (l_tmNode == NULL)
{
//Add task to list and set message count to 1
l_tmNode = new TaskMsgNode();
l_tmNode->key = i_task;
l_tmNode->msgCount = 0;
iv_msgGrpList.insert(l_tmNode);
}
l_tmNode->msgCount++;
}
void BlockWriteMsgHdlr::addVirtAddr(void* i_vaddr,uint64_t i_pgAddr)
{
PageAddrNode* l_paNode = new PageAddrNode();
l_paNode->key = i_vaddr;
l_paNode->pageAddr = i_pgAddr;
iv_va2paList.insert(l_paNode);
}
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