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feat(oran_fhlib_5g): BFP compression and decompression for Arm targets

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The fronthaul library ships with BFP compression for AVX512 enabled targets.
This commit adds BFP compression for Arm targets by using the ArmRAL library.
This commit is contained in:
Romain Beurdouche
2025-04-04 13:25:53 +00:00
parent 047e80f070
commit 54fd8ed9df
5 changed files with 330 additions and 6 deletions
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cmake_targets/tools/MODULES/Findarmral.cmake
+123
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@@ -0,0 +1,123 @@
#
# Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The OpenAirInterface Software Alliance licenses this file to You under
# the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
#
# 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.
# ------------------------------------------------------------------------------
# For more information about the OpenAirInterface (OAI) Software Alliance:
# contact@openairinterface.org
#
# FindArmral
# -------
#
# Finds the armral library.
# the version is currently hardcoded to 25.01
#
# Optional options
# ^^^^^^^^^^^^^^^^
#
# ``armral_LOCATION``
# The location of the library.
#
# Imported Targets
# ^^^^^^^^^^^^^^^^
#
# This module provides the following imported targets, if found:
#
# ``armral``
# The armral library
#
# Result Variables
# ^^^^^^^^^^^^^^^^
#
# This will define the following variables:
#
# ``armral_FOUND``
# True if the system has the armral library.
# ``armral_VERSION``
# The version of the armral library which was found.
# ``armral_INCLUDE_DIRS``
# Include directories needed to use armral.
# ``armral_LIBRARIES``
# Libraries needed to link to armral.
#
# Cache Variables
# ^^^^^^^^^^^^^^^
#
# The following cache variables may also be set:
#
# ``armral_INCLUDE_DIR``
# The directory containing ``armral.h``.
# ``armral_LIBRARY``
# The path to the armral library.
option(armral_LOCATION "directory of ArmRAL library" "")
if (NOT armral_LOCATION)
set(armral_LOCATION "/usr/local")
endif()
if (NOT EXISTS ${armral_LOCATION})
message(FATAL_ERROR "no such directory: ${armral_LOCATION}")
endif()
find_path(armral_INCLUDE_DIR
NAMES
armral.h
HINTS ${armral_LOCATION}
PATH_SUFFIXES include
NO_DEFAULT_PATH
)
if (NOT armral_INCLUDE_DIR)
message(FATAL_ERROR "could not detect armral header at ${armral_LOCATION}/include")
endif()
find_library(armral_LIBRARY
NAMES armral
HINTS ${armral_LOCATION}
PATH_SUFFIXES lib build
NO_DEFAULT_PATH
)
if (NOT armral_LIBRARY)
message(FATAL_ERROR "could not detect armral build artifacts at neither ${armral_LOCATION}/lib nor ${armral_LOCATION}/build")
endif()
# No way to retrieve the version from header or library
set(armral_VERSION 25.01)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(armral
FOUND_VAR armral_FOUND
REQUIRED_VARS
armral_LIBRARY
armral_INCLUDE_DIR
VERSION_VAR armral_VERSION
)
if(armral_FOUND)
set(armral_LIBRARIES ${armral_LIBRARY})
set(armral_INCLUDE_DIRS ${armral_INCLUDE_DIR})
endif()
if(armral_FOUND AND NOT TARGET armral)
add_library(armral UNKNOWN IMPORTED)
set_target_properties(armral PROPERTIES
IMPORTED_LOCATION "${armral_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${armral_INCLUDE_DIRS}"
)
endif()
mark_as_advanced(
armral_INCLUDE_DIR
armral_LIBRARY
)
radio/fhi_72/CMakeLists.txt
+5
View File
@@ -32,6 +32,11 @@ add_compile_options(-Wno-packed-not-aligned)
set_target_properties(oran_fhlib_5g PROPERTIES COMPILE_FLAGS "-fvisibility=hidden -march=native")
target_link_libraries(oran_fhlib_5g PRIVATE xran::xran ${dpdk_LINK_LIBRARIES} ${T_LIB} pthread dl rt m numa)
target_include_directories(oran_fhlib_5g PRIVATE ${dpdk_INCLUDE_DIRS})
if (CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
find_package(armral REQUIRED)
target_sources(oran_fhlib_5g PRIVATE armral_bfp_compression.c)
target_link_libraries(oran_fhlib_5g PRIVATE armral)
endif()
add_boolean_option(OAI_FHI72_USE_POLLING OFF "Enable polling in FHI72 driver" ON)
radio/fhi_72/armral_bfp_compression.c
+116
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@@ -0,0 +1,116 @@
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
*
* 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.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file radio/fhi_72/armral_bfp_compression.c
* \brief BFP compression for the O-RAN 7.2 FrontHaul Interface for Arm systems using the Arm RAN Acceleration Library
* \author Romain Beurdouche
* \date 2025
* \company EURECOM
* \email romain.beurdouche@eurecom.fr
* \note ArmRAL available at https://git.gitlab.arm.com/networking/ral.git
* \warning
*/
#include "armral.h"
#include <rte_branch_prediction.h>
#include "armral_bfp_compression.h"
#include "common/utils/LOG/log.h"
/**
* The function operates on a fixed block size of one Physical Resource Block
* (PRB). Each block consists of 12 16-bit complex resource elements. Each block
* taken as input is compressed into 24 samples with a common unsigned scaling factor.
*
* @param[in] iq_width Width in bits of compressed samples.
* @param[in] n_prb The number of input resource blocks.
* @param[in] src Points to the input complex samples sequence.
* @param[out] dst Points to the output compressed data.
*/
void armral_bfp_compression(uint32_t iq_width, uint32_t n_prb, int16_t *src, int8_t *dst)
{
armral_status ret = ARMRAL_ARGUMENT_ERROR;
switch (iq_width) {
case 8:
ret = armral_block_float_compr_8bit(n_prb, (armral_cmplx_int16_t *)src, (armral_compressed_data_8bit *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_compr_8bit returned an error: %d\n", (int)ret);
}
break;
case 9:
ret = armral_block_float_compr_9bit(n_prb, (armral_cmplx_int16_t *)src, (armral_compressed_data_9bit *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_compr_9bit returned an error: %d\n", (int)ret);
}
break;
case 14:
ret = armral_block_float_compr_14bit(n_prb, (armral_cmplx_int16_t *)src, (armral_compressed_data_14bit *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_compr_14bit returned an error: %d\n", (int)ret);
}
break;
default:
LOG_E(HW, "Unsupported IQ width in BFP compression: %d\n", iq_width);
}
}
/**
* The function operates on a fixed block size of one Physical Resource Block
* (PRB). Each block consists of 12 compressed complex resource elements.
* Each block taken as input is expanded into 12 16-bit complex samples.
*
* @param[in] iq_width Width in bits of compressed samples.
* @param[in] n_prb The number of input resource blocks.
* @param[in] src Points to the input compressed data.
* @param[out] dst Points to the output complex samples sequence.
*/
void armral_bfp_decompression(uint32_t iq_width, uint32_t n_prb, int8_t *src, int16_t *dst)
{
armral_status ret = ARMRAL_ARGUMENT_ERROR;
switch (iq_width) {
case 8:
ret = armral_block_float_decompr_8bit(n_prb, (armral_compressed_data_8bit *)src, (armral_cmplx_int16_t *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_decompr_8bit returned an error: %d\n", (int)ret);
}
break;
case 9:
ret = armral_block_float_decompr_9bit(n_prb, (armral_compressed_data_9bit *)src, (armral_cmplx_int16_t *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_decompr_9bit returned an error: %d\n", (int)ret);
}
break;
case 14:
ret = armral_block_float_decompr_14bit(n_prb, (armral_compressed_data_14bit *)src, (armral_cmplx_int16_t *)dst, NULL);
if (unlikely(ret != ARMRAL_SUCCESS)) {
LOG_E(HW, "armral_block_scaling_decompr_14bit returned an error: %d\n", (int)ret);
}
break;
default:
LOG_E(HW, "Unsupported IQ width in BFP decompression: %d\n", iq_width);
}
}
radio/fhi_72/armral_bfp_compression.h
+59
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@@ -0,0 +1,59 @@
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
*
* 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.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file radio/fhi_72/armral_bfp_compression.h
* \brief BFP compression for the O-RAN 7.2 FrontHaul Interface for Arm systems using the Arm RAN Acceleration Library
* \author Romain Beurdouche
* \date 2025
* \company EURECOM
* \email romain.beurdouche@eurecom.fr
* \note ArmRAL available at https://git.gitlab.arm.com/networking/ral.git
* \warning
*/
#ifndef __ARMRAL_BFP_COMPRESSION_H__
#define __ARMRAL_BFP_COMPRESSION_H__
/**
* The function operates on a fixed block size of one Physical Resource Block
* (PRB). Each block consists of 12 16-bit complex resource elements. Each block
* taken as input is compressed into 24 samples with a common unsigned scaling factor.
*
* @param[in] iq_width Width in bits of compressed samples.
* @param[in] n_prb The number of input resource blocks.
* @param[in] src Points to the input complex samples sequence.
* @param[out] dst Points to the output compressed data.
*/
void armral_bfp_compression(uint32_t iq_width, uint32_t n_prb, int16_t *src, int8_t *dst);
/**
* The function operates on a fixed block size of one Physical Resource Block
* (PRB). Each block consists of 12 compressed complex resource elements.
* Each block taken as input is expanded into 12 16-bit complex samples.
*
* @param[in] iq_width Width in bits of compressed samples.
* @param[in] n_prb The number of input resource blocks.
* @param[in] src Points to the input compressed data.
* @param[out] dst Points to the output complex samples sequence.
*/
void armral_bfp_decompression(uint32_t iq_width, uint32_t n_prb, int8_t *src, int16_t *dst);
#endif
radio/fhi_72/oaioran.c
+27 -6
View File
@@ -24,6 +24,7 @@
#include <stdlib.h>
#include "xran_fh_o_du.h"
#include "xran_compression.h"
#include "armral_bfp_compression.h"
#if defined(__arm__) || defined(__aarch64__)
#else
@@ -215,12 +216,14 @@ static int read_prach_data(ru_info_t *ru, int frame, int slot)
}
}
} else if (ru_conf->compMeth_PRACH == XRAN_COMPMETHOD_BLKFLOAT) {
struct xranlib_decompress_request bfp_decom_req = {};
struct xranlib_decompress_response bfp_decom_rsp = {};
int16_t local_dst[12 * 2 * N_SC_PER_PRB] __attribute__((aligned(64)));
#if defined(__i386__) || defined(__x86_64__)
struct xranlib_decompress_request bfp_decom_req = {};
struct xranlib_decompress_response bfp_decom_rsp = {};
int payload_len = (3 * ru_conf->iqWidth_PRACH + 1) * 12; // 12 = closest number of PRBs to 139 REs
bfp_decom_req.data_in = (int8_t *)src;
bfp_decom_req.numRBs = 12; // closest number of PRBs to 139 REs
bfp_decom_req.len = payload_len;
@@ -230,6 +233,11 @@ static int read_prach_data(ru_info_t *ru, int frame, int slot)
bfp_decom_rsp.data_out = (int16_t *)local_dst;
bfp_decom_rsp.len = 0;
xranlib_decompress_avx512(&bfp_decom_req, &bfp_decom_rsp);
#elif defined(__arm__) || defined(__aarch64__)
armral_bfp_decompression(ru_conf->iqWidth_PRACH, 12, (int8_t *)src, (int16_t *)local_dst);
#else
AssertFatal(1 == 0, "BFP decompression not supported on this architecture");
#endif
// note: this is hardwired for 139 point PRACH sequence, kbar=2
if (sym_idx == 0) //
for (idx = 0; idx < (139 * 2); idx++)
@@ -380,8 +388,6 @@ int xran_fh_rx_read_slot(ru_info_t *ru, int *frame, int *slot)
uint32_t idxElm = 0;
uint8_t *src = (uint8_t *)ptr;
int16_t payload_len = 0;
LOG_D(HW, "pRbMap->nPrbElm %d\n", pRbMap->nPrbElm);
for (idxElm = 0; idxElm < pRbMap->nPrbElm; idxElm++) {
@@ -412,10 +418,12 @@ int xran_fh_rx_read_slot(ru_info_t *ru, int *frame, int *slot)
memcpy((void *)dst2, (void *)local_dst, neg_len * 4);
memcpy((void *)dst1, (void *)&local_dst[neg_len], pos_len * 4);
} else if (pRbElm->compMethod == XRAN_COMPMETHOD_BLKFLOAT) {
#if defined(__i386__) || defined(__x86_64__)
struct xranlib_decompress_request bfp_decom_req = {};
struct xranlib_decompress_response bfp_decom_rsp = {};
payload_len = (3 * pRbElm->iqWidth + 1) * pRbElm->nRBSize;
int16_t payload_len = (3 * pRbElm->iqWidth + 1) * pRbElm->nRBSize;
bfp_decom_req.data_in = (int8_t *)src;
bfp_decom_req.numRBs = pRbElm->nRBSize;
bfp_decom_req.len = payload_len;
@@ -426,6 +434,11 @@ int xran_fh_rx_read_slot(ru_info_t *ru, int *frame, int *slot)
bfp_decom_rsp.len = 0;
xranlib_decompress_avx512(&bfp_decom_req, &bfp_decom_rsp);
#elif defined(__arm__) || defined(__aarch64__)
armral_bfp_decompression(pRbElm->iqWidth, pRbElm->nRBSize, (int8_t *)src, (int16_t *)local_dst);
#else
AssertFatal(1 == 0, "BFP compression not supported on this architecture");
#endif
memcpy((void *)dst2, (void *)local_dst, neg_len * 4);
memcpy((void *)dst1, (void *)&local_dst[neg_len], pos_len * 4);
outcnt++;
@@ -552,9 +565,12 @@ int xran_fh_tx_send_slot(ru_info_t *ru, int frame, int slot, uint64_t timestamp)
for (idx = 0; idx < (pos_len + neg_len) * 2; idx++)
((uint16_t *)dst16)[idx] = htons(((uint16_t *)local_src)[idx]);
} else if (p_prbMapElm->compMethod == XRAN_COMPMETHOD_BLKFLOAT) {
payload_len = (3 * p_prbMapElm->iqWidth + 1) * p_prbMapElm->nRBSize;
#if defined(__i386__) || defined(__x86_64__)
struct xranlib_compress_request bfp_com_req = {};
struct xranlib_compress_response bfp_com_rsp = {};
payload_len = (3 * p_prbMapElm->iqWidth + 1) * p_prbMapElm->nRBSize;
bfp_com_req.data_in = (int16_t *)local_src;
bfp_com_req.numRBs = p_prbMapElm->nRBSize;
bfp_com_req.len = payload_len;
@@ -565,6 +581,11 @@ int xran_fh_tx_send_slot(ru_info_t *ru, int frame, int slot, uint64_t timestamp)
bfp_com_rsp.len = 0;
xranlib_compress_avx512(&bfp_com_req, &bfp_com_rsp);
#elif defined(__arm__) || defined(__aarch64__)
armral_bfp_compression(p_prbMapElm->iqWidth, p_prbMapElm->nRBSize, (int16_t *)local_src, (int8_t *)dst);
#else
AssertFatal(1 == 0, "BFP compression not supported on this architecture");
#endif
} else {
printf("p_prbMapElm->compMethod == %d is not supported\n", p_prbMapElm->compMethod);