From 7286b2518ec8e4398b512ce95def9166a7af2e4a Mon Sep 17 00:00:00 2001 From: Deepak S Date: Thu, 13 Jul 2017 21:26:50 -0700 Subject: Adding PROX(Packet pROcessing eXecution engine) VNF to sampleVNF JIRA: SAMPLEVNF-55 PROX is a DPDK-based application implementing Telco use-cases such as a simplified BRAS/BNG, light-weight AFTR... It also allows configuring finer grained network functions like QoS, Routing, load-balancing... (We are moving PROX version v039 to sampleVNF https://01.org/intel-data-plane-performance-demonstrators/prox-overview) Change-Id: Ia3cb02cf0e49ac5596e922c197ff7e010293d033 Signed-off-by: Deepak S --- VNFs/DPPD-PROX/msr.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 VNFs/DPPD-PROX/msr.c (limited to 'VNFs/DPPD-PROX/msr.c') diff --git a/VNFs/DPPD-PROX/msr.c b/VNFs/DPPD-PROX/msr.c new file mode 100644 index 00000000..194d4c75 --- /dev/null +++ b/VNFs/DPPD-PROX/msr.c @@ -0,0 +1,80 @@ +/* +// Copyright (c) 2010-2017 Intel Corporation +// +// 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. +*/ + +#include +#include +#include +#include +#include + +#include "msr.h" +#include "log.h" + +int msr_fd[RTE_MAX_LCORE]; +int n_msr_fd; +int msr_init(void) +{ + char msr_path[1024]; + + if (n_msr_fd) { + return 0; + } + + for (uint32_t i = 0; i < sizeof(msr_fd)/sizeof(*msr_fd); ++i, n_msr_fd = i) { + snprintf(msr_path, sizeof(msr_path), "/dev/cpu/%u/msr", i); + msr_fd[i] = open(msr_path, O_RDWR); + if (msr_fd[i] < 0) { + return i == 0? -1 : 0; + } + } + + return 0; +} + +void msr_cleanup(void) +{ + for (int i = 0; i < n_msr_fd; ++i) { + close(msr_fd[i]); + } + + n_msr_fd = 0; +} + +int msr_read(uint64_t *ret, int lcore_id, off_t offset) +{ + if (lcore_id > n_msr_fd) { + return -1; + } + + if (0 > pread(msr_fd[lcore_id], ret, sizeof(uint64_t), offset)) { + return -1; + } + + return 0; +} + +int msr_write(int lcore_id, uint64_t val, off_t offset) +{ + if (lcore_id > n_msr_fd) { + return -1; + } + + if (sizeof(uint64_t) != pwrite(msr_fd[lcore_id], &val, sizeof(uint64_t), offset)) { + return -1; + } + plog_dbg("\t\tmsr_write(core %d, offset %x, val %lx)\n", lcore_id, (int)offset, val); + return 0; +} -- cgit 1.2.3-korg