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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/fapi2/plat_mmio_access.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2018 */
/* [+] 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 */
/**
* @file plat_mmio_access.C
*
* @brief Implements FAPI mmio functions at the platform layer.
*/
#include <stdint.h>
#include <errl/errlentry.H>
#include <devicefw/userif.H>
#include <return_code.H>
#include <target.H>
#include <target_types.H>
#include <plat_utils.H>
#include <attribute_service.H>
#include <hwpf_fapi2_reasoncodes.H>
#include <fapi2/plat_mmio_access.H>
namespace fapi2
{
//------------------------------------------------------------------------------
// HW Communication Functions to be implemented at the platform layer.
//------------------------------------------------------------------------------
/// @brief Platform-level implementation of getMMIO()
/// Reads data via MMIO from the target
ReturnCode platGetMMIO( const Target<TARGET_TYPE_ALL>& i_target,
const uint64_t i_mmioAddr,
const size_t i_transSize,
std::vector<uint8_t>& o_data )
{
ReturnCode l_rc;
errlHndl_t l_err = nullptr;
FAPI_DBG(ENTER_MRK "platGetMMIO");
// Note: Trace is placed here in plat code because PPE doesn't support
// trace in common fapi2_mmio_access.H
bool l_traceit = platIsScanTraceEnabled();
// Grab the name of the target
TARGETING::ATTR_FAPI_NAME_type l_targName = {0};
fapi2::toString(i_target, l_targName, sizeof(l_targName));
size_t l_get_size = o_data.size();
// create a temporary buffer for read data
uint8_t * l_data_read = new uint8_t[ l_get_size ];
do
{
// Extract the component pointer
TARGETING::Target * l_target = nullptr;
l_err = fapi2::platAttrSvc::getTargetingTarget(i_target, l_target);
if ( l_err )
{
FAPI_ERR( "platGetMMIO: Error from getTargetingTarget on %s",
l_targName );
break; //return with error
}
// call MMIO driver
l_err = DeviceFW::deviceRead(l_target,
l_data_read,
l_get_size,
DEVICE_MMIO_ADDRESS(i_mmioAddr, i_transSize));
if (l_traceit)
{
// Only trace the first 8 bytes of data read
// (don't want to overflow trace buffer)
uint64_t l_traceDataRead = 0;
if (l_get_size >= sizeof(l_traceDataRead))
{
memcpy(&l_traceDataRead, l_data_read, sizeof(l_traceDataRead));
}
else if (l_get_size > 0)
{
memcpy(&l_traceDataRead, l_data_read, l_get_size);
}
FAPI_SCAN("TRACE : getMMIO : %s %d - %d %.16llX",
l_targName,
o_data.size(),
l_get_size,
l_traceDataRead);
}
} while(0);
if (l_err)
{
l_rc.setPlatDataPtr(reinterpret_cast<void *> (l_err));
}
else
{
// read was successful so copy data into o_data
o_data.clear();
o_data.insert( o_data.end(),
&l_data_read[0],
&l_data_read[l_get_size] );
}
delete [] l_data_read;
FAPI_DBG(EXIT_MRK "platGetMMIO");
return l_rc;
}
/// @brief Platform-level implementation of putMMIO()
/// Writes data via MMIO to the target
ReturnCode platPutMMIO( const Target<TARGET_TYPE_ALL>& i_target,
const uint64_t i_mmioAddr,
const size_t i_transSize,
const std::vector<uint8_t>& i_data )
{
ReturnCode l_rc;
errlHndl_t l_err = nullptr;
uint8_t * l_writeDataPtr;
FAPI_DBG(ENTER_MRK "platPutMMIO");
// Note: Trace is placed here in plat code because PPE doesn't support
// trace in common fapi2_mmio_access.H
bool l_traceit = platIsScanTraceEnabled();
// Grab the name of the target
TARGETING::ATTR_FAPI_NAME_type l_targName = {0};
fapi2::toString(i_target, l_targName, sizeof(l_targName));
do {
// Extract the component pointer
TARGETING::Target * l_target = nullptr;
l_err = fapi2::platAttrSvc::getTargetingTarget(i_target, l_target);
if (l_err)
{
FAPI_ERR( "platPutMMIO: Error from getTargetingTarget on %s",
l_targName );
break; //return with error
}
//copy data from const vector to data ptr
l_writeDataPtr = new uint8_t[ i_data.size() ];
std::copy(i_data.begin(), i_data.end(), l_writeDataPtr);
size_t l_dataSize = i_data.size();
// call MMIO driver
l_err = DeviceFW::deviceWrite(l_target,
l_writeDataPtr,
l_dataSize,
DEVICE_MMIO_ADDRESS(i_mmioAddr, i_transSize));
if (l_traceit)
{
// trace the first 8 bytes of written data
// (avoid trace buffer overflow)
uint64_t traceWriteData = 0;
if (l_dataSize > sizeof(traceWriteData))
{
// copy what will fit into traceWriteData variable
memcpy(&traceWriteData, l_writeDataPtr, sizeof(traceWriteData));
}
else
{
memcpy(&traceWriteData, l_writeDataPtr, l_dataSize);
}
FAPI_SCAN( "TRACE : putMMIO : %s : %d %.16llX",
l_targName,
l_dataSize,
traceWriteData );
}
delete [] l_writeDataPtr;
} while (0);
if (l_err)
{
l_rc.setPlatDataPtr(reinterpret_cast<void *> (l_err));
}
FAPI_DBG(EXIT_MRK "platPutMMIO");
return l_rc;
}
} // End namespace
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