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p9_fbc_utils.C
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p9_fbc_utils.C
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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9/procedures/hwp/nest/p9_fbc_utils.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2017 */
/* [+] 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 p9_fbc_utils.C
/// @brief Fabric library functions/constants (FAPI2)
///
/// The functions in this file provide:
/// - Information about the instantaneous state of the fabric
/// - Means to restart the fabric after a checkstop condition
/// - Determination of the chip's base address in the real address map
///
/// @author Joe McGill <jmcgill@us.ibm.com>
/// @author Christy Graves <clgraves@us.ibm.com>
///
//
// *HWP HWP Owner: Joe McGill <jmcgill@us.ibm.com>
// *HWP FW Owner: Thi Tran <thi@us.ibm.com>
// *HWP Team: Nest
// *HWP Level: 2
// *HWP Consumed by: SBE,HB,FSP
//
//------------------------------------------------------------------------------
// Includes
//------------------------------------------------------------------------------
#include <p9_fbc_utils.H>
#include <p9_misc_scom_addresses.H>
//------------------------------------------------------------------------------
// Constant definitions
//------------------------------------------------------------------------------
// ADU PMisc Register field/bit definitions
const uint32_t ALTD_SND_MODE_DISABLE_CHECKSTOP_BIT = 19;
const uint32_t ALTD_SND_MODE_MANUAL_CLR_PB_STOP_BIT = 21;
const uint32_t ALTD_SND_MODE_PB_STOP_BIT = 22;
// FBC Mode Register field/bit definitions
const uint32_t PU_FBC_MODE_PB_INITIALIZED_BIT = 0;
// FBC base address determination constants
// system ID (large system)
const uint8_t FABRIC_ADDR_LS_SYSTEM_ID_START_BIT = 8;
const uint8_t FABRIC_ADDR_LS_SYSTEM_ID_END_BIT = 12;
// group ID (large system)
const uint8_t FABRIC_ADDR_LS_GROUP_ID_START_BIT = 15;
const uint8_t FABRIC_ADDR_LS_GROUP_ID_END_BIT = 18;
// chip ID (large system)
const uint8_t FABRIC_ADDR_LS_CHIP_ID_START_BIT = 19;
const uint8_t FABRIC_ADDR_LS_CHIP_ID_END_BIT = 21;
// msel bits (large & small system)
const uint8_t FABRIC_ADDR_MSEL_START_BIT = 13;
const uint8_t FABRIC_ADDR_MSEL_END_BIT = 14;
//------------------------------------------------------------------------------
// Function definitions
//------------------------------------------------------------------------------
fapi2::ReturnCode p9_fbc_utils_get_fbc_state(
const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_target,
bool& o_is_initialized,
bool& o_is_running)
{
FAPI_DBG("Start");
// TODO: HW328175
// fapi2::buffer<uint64_t> l_fbc_mode_data;
// FAPI_TRY(fapi2::getScom(i_target, PU_FBC_MODE_REG, l_fbc_mode_data),
// "Error reading FBC Mode Register");
// // fabric is initialized if PB_INITIALIZED bit is one/set
// o_is_initialized = l_fbc_mode_data.getBit<PU_FBC_MODE_PB_INITIALIZED_BIT>();
// currently, sampling FBC init from PB Mode register is unreliable
// as init can drop perodically at runtime (based on legacy sleep backoff)
// until this issue is fixed, just return true to caller
o_is_initialized = true;
// read ADU PMisc Mode Register state
fapi2::buffer<uint64_t> l_pmisc_mode_data;
FAPI_TRY(fapi2::getScom(i_target, PU_SND_MODE_REG, l_pmisc_mode_data),
"Error reading ADU PMisc Mode register");
// fabric is running if FBC_STOP bit is zero/clear
o_is_running = !(l_pmisc_mode_data.getBit<ALTD_SND_MODE_PB_STOP_BIT>());
fapi_try_exit:
FAPI_DBG("End");
return fapi2::current_err;
}
fapi2::ReturnCode p9_fbc_utils_override_fbc_stop(
const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_target)
{
FAPI_DBG("Start");
// read ADU PMisc Mode Register state
fapi2::buffer<uint64_t> l_pmisc_mode_data;
FAPI_TRY(fapi2::getScom(i_target, PU_SND_MODE_REG, l_pmisc_mode_data),
"Error reading ADU PMisc Mode register");
// set bit to disable checkstop forwarding and write back
l_pmisc_mode_data.setBit<ALTD_SND_MODE_DISABLE_CHECKSTOP_BIT>();
FAPI_TRY(fapi2::putScom(i_target, PU_SND_MODE_REG, l_pmisc_mode_data),
"Error writing ADU PMisc Mode register to disable checkstop forwarding to FBC");
// set bit to manually clear stop control and write back
l_pmisc_mode_data.setBit<ALTD_SND_MODE_MANUAL_CLR_PB_STOP_BIT>();
FAPI_TRY(fapi2::putScom(i_target, PU_SND_MODE_REG, l_pmisc_mode_data),
"Error writing ADU PMisc Mode register to manually clear FBC stop control");
fapi_try_exit:
FAPI_DBG("End");
return fapi2::current_err;
}
fapi2::ReturnCode p9_fbc_utils_get_chip_base_address(
const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_target,
const p9_fbc_utils_addr_mode_t i_addr_mode,
uint64_t& o_base_address_nm0,
uint64_t& o_base_address_nm1,
uint64_t& o_base_address_m,
uint64_t& o_base_address_mmio)
{
uint32_t l_fabric_system_id = 0;
uint8_t l_fabric_group_id = 0;
uint8_t l_fabric_chip_id = 0;
uint8_t l_mirror_policy;
fapi2::buffer<uint64_t> l_base_address;
const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> FAPI_SYSTEM;
FAPI_DBG("Start");
// retreive attributes which statically determine chips position in memory map
// use effective group/chip ID attributes to program position specific address bits
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_FABRIC_SYSTEM_ID, i_target, l_fabric_system_id),
"Error from FAPI_ATTR_GET (ATTR_FABRIC_SYSTEM_ID)");
if (i_addr_mode == ABS_FBC_GRP_CHIP_IDS)
{
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_FABRIC_GROUP_ID, i_target, l_fabric_group_id),
"Error from FAPI_ATTR_GET (ATTR_FABRIC_GROUP_ID)");
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_FABRIC_CHIP_ID, i_target, l_fabric_chip_id),
"Error from FAPI_ATTR_GET (ATTR_FABRIC_CHIP_ID)");
}
else
{
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_EFF_FABRIC_GROUP_ID, i_target, l_fabric_group_id),
"Error from FAPI_ATTR_GET (ATTR_EFF_FABRIC_GROUP_ID)");
if (i_addr_mode == EFF_FBC_GRP_CHIP_IDS)
{
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_EFF_FABRIC_CHIP_ID, i_target, l_fabric_chip_id),
"Error from FAPI_ATTR_GET (ATTR_EFF_FABRIC_CHIP_ID)");
}
}
FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_MEM_MIRROR_PLACEMENT_POLICY, FAPI_SYSTEM, l_mirror_policy),
"Error from FAPI_ATTR_GET (ATTR_MEM_MIRROR_PLACEMENT_POLICY)");
// apply system ID
// occupies one field for large system map (three fields for small system map)
l_base_address.insertFromRight < FABRIC_ADDR_LS_SYSTEM_ID_START_BIT,
(FABRIC_ADDR_LS_SYSTEM_ID_END_BIT - FABRIC_ADDR_LS_SYSTEM_ID_START_BIT + 1) > (l_fabric_system_id);
// apply group ID
l_base_address.insertFromRight < FABRIC_ADDR_LS_GROUP_ID_START_BIT,
(FABRIC_ADDR_LS_GROUP_ID_END_BIT - FABRIC_ADDR_LS_GROUP_ID_START_BIT + 1) > (l_fabric_group_id);
// apply chip ID (relevant for large system map only)
l_base_address.insertFromRight < FABRIC_ADDR_LS_CHIP_ID_START_BIT,
(FABRIC_ADDR_LS_CHIP_ID_END_BIT - FABRIC_ADDR_LS_CHIP_ID_START_BIT + 1) > (l_fabric_chip_id);
// set output addresses based on application of msel
if (l_mirror_policy == fapi2::ENUM_ATTR_MEM_MIRROR_PLACEMENT_POLICY_NORMAL)
{
// nm = 0b00/01, m = 0b10, mmio = 0b11
o_base_address_nm0 = l_base_address(); // 00
l_base_address.setBit<FABRIC_ADDR_MSEL_END_BIT>();
o_base_address_nm1 = l_base_address(); // 01
l_base_address.setBit<FABRIC_ADDR_MSEL_START_BIT>();
l_base_address.clearBit<FABRIC_ADDR_MSEL_END_BIT>();
o_base_address_m = l_base_address(); // 10
l_base_address.setBit(FABRIC_ADDR_MSEL_END_BIT);
o_base_address_mmio = l_base_address(); // 11
}
else
{
// nm = 0b01/10, m = 0b00, mmio = 0b11
o_base_address_m = l_base_address(); // 00
l_base_address.setBit<FABRIC_ADDR_MSEL_END_BIT>();
o_base_address_nm0 = l_base_address(); // 01
l_base_address.setBit<FABRIC_ADDR_MSEL_START_BIT>();
l_base_address.clearBit<FABRIC_ADDR_MSEL_END_BIT>();
o_base_address_nm1 = l_base_address(); // 10
l_base_address.setBit<FABRIC_ADDR_MSEL_END_BIT>();
o_base_address_mmio = l_base_address(); // 11
}
fapi_try_exit:
FAPI_DBG("End");
return fapi2::current_err;
}