diff options
Diffstat (limited to 'src/dpdk_lib18/librte_power/rte_power_acpi_cpufreq.c')
| -rwxr-xr-x | src/dpdk_lib18/librte_power/rte_power_acpi_cpufreq.c | 545 |
1 files changed, 0 insertions, 545 deletions
diff --git a/src/dpdk_lib18/librte_power/rte_power_acpi_cpufreq.c b/src/dpdk_lib18/librte_power/rte_power_acpi_cpufreq.c deleted file mode 100755 index a56c9b59..00000000 --- a/src/dpdk_lib18/librte_power/rte_power_acpi_cpufreq.c +++ /dev/null @@ -1,545 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <stdio.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <signal.h> -#include <limits.h> - -#include <rte_memcpy.h> -#include <rte_atomic.h> - -#include "rte_power_acpi_cpufreq.h" -#include "rte_power_common.h" - -#ifdef RTE_LIBRTE_POWER_DEBUG -#define POWER_DEBUG_TRACE(fmt, args...) do { \ - RTE_LOG(ERR, POWER, "%s: " fmt, __func__, ## args); \ -} while (0) -#else -#define POWER_DEBUG_TRACE(fmt, args...) -#endif - -#define FOPEN_OR_ERR_RET(f, retval) do { \ - if ((f) == NULL) { \ - RTE_LOG(ERR, POWER, "File not openned\n"); \ - return retval; \ - } \ -} while (0) - -#define FOPS_OR_NULL_GOTO(ret, label) do { \ - if ((ret) == NULL) { \ - RTE_LOG(ERR, POWER, "fgets returns nothing\n"); \ - goto label; \ - } \ -} while (0) - -#define FOPS_OR_ERR_GOTO(ret, label) do { \ - if ((ret) < 0) { \ - RTE_LOG(ERR, POWER, "File operations failed\n"); \ - goto label; \ - } \ -} while (0) - -#define STR_SIZE 1024 -#define POWER_CONVERT_TO_DECIMAL 10 - -#define POWER_GOVERNOR_USERSPACE "userspace" -#define POWER_SYSFILE_GOVERNOR \ - "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_governor" -#define POWER_SYSFILE_AVAIL_FREQ \ - "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_available_frequencies" -#define POWER_SYSFILE_SETSPEED \ - "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_setspeed" - -enum power_state { - POWER_IDLE = 0, - POWER_ONGOING, - POWER_USED, - POWER_UNKNOWN -}; - -/** - * Power info per lcore. - */ -struct rte_power_info { - unsigned lcore_id; /**< Logical core id */ - uint32_t freqs[RTE_MAX_LCORE_FREQS]; /**< Frequency array */ - uint32_t nb_freqs; /**< number of available freqs */ - FILE *f; /**< FD of scaling_setspeed */ - char governor_ori[32]; /**< Original governor name */ - uint32_t curr_idx; /**< Freq index in freqs array */ - volatile uint32_t state; /**< Power in use state */ -} __rte_cache_aligned; - -static struct rte_power_info lcore_power_info[RTE_MAX_LCORE]; - -/** - * It is to set specific freq for specific logical core, according to the index - * of supported frequencies. - */ -static int -set_freq_internal(struct rte_power_info *pi, uint32_t idx) -{ - if (idx >= RTE_MAX_LCORE_FREQS || idx >= pi->nb_freqs) { - RTE_LOG(ERR, POWER, "Invalid frequency index %u, which " - "should be less than %u\n", idx, pi->nb_freqs); - return -1; - } - - /* Check if it is the same as current */ - if (idx == pi->curr_idx) - return 0; - - POWER_DEBUG_TRACE("Freqency[%u] %u to be set for lcore %u\n", - idx, pi->freqs[idx], pi->lcore_id); - if (fseek(pi->f, 0, SEEK_SET) < 0) { - RTE_LOG(ERR, POWER, "Fail to set file position indicator to 0 " - "for setting frequency for lcore %u\n", pi->lcore_id); - return -1; - } - if (fprintf(pi->f, "%u", pi->freqs[idx]) < 0) { - RTE_LOG(ERR, POWER, "Fail to write new frequency for " - "lcore %u\n", pi->lcore_id); - return -1; - } - fflush(pi->f); - pi->curr_idx = idx; - - return 1; -} - -/** - * It is to check the current scaling governor by reading sys file, and then - * set it into 'userspace' if it is not by writing the sys file. The original - * governor will be saved for rolling back. - */ -static int -power_set_governor_userspace(struct rte_power_info *pi) -{ - FILE *f; - int ret = -1; - char buf[BUFSIZ]; - char fullpath[PATH_MAX]; - char *s; - int val; - - snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR, - pi->lcore_id); - f = fopen(fullpath, "rw+"); - FOPEN_OR_ERR_RET(f, ret); - - s = fgets(buf, sizeof(buf), f); - FOPS_OR_NULL_GOTO(s, out); - - /* Check if current governor is userspace */ - if (strncmp(buf, POWER_GOVERNOR_USERSPACE, - sizeof(POWER_GOVERNOR_USERSPACE)) == 0) { - ret = 0; - POWER_DEBUG_TRACE("Power management governor of lcore %u is " - "already userspace\n", pi->lcore_id); - goto out; - } - /* Save the original governor */ - snprintf(pi->governor_ori, sizeof(pi->governor_ori), "%s", buf); - - /* Write 'userspace' to the governor */ - val = fseek(f, 0, SEEK_SET); - FOPS_OR_ERR_GOTO(val, out); - - val = fputs(POWER_GOVERNOR_USERSPACE, f); - FOPS_OR_ERR_GOTO(val, out); - - ret = 0; - RTE_LOG(INFO, POWER, "Power management governor of lcore %u has been " - "set to user space successfully\n", pi->lcore_id); -out: - fclose(f); - - return ret; -} - -/** - * It is to get the available frequencies of the specific lcore by reading the - * sys file. - */ -static int -power_get_available_freqs(struct rte_power_info *pi) -{ - FILE *f; - int ret = -1, i, count; - char *p; - char buf[BUFSIZ]; - char fullpath[PATH_MAX]; - char *freqs[RTE_MAX_LCORE_FREQS]; - char *s; - - snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_AVAIL_FREQ, - pi->lcore_id); - f = fopen(fullpath, "r"); - FOPEN_OR_ERR_RET(f, ret); - - s = fgets(buf, sizeof(buf), f); - FOPS_OR_NULL_GOTO(s, out); - - /* Strip the line break if there is */ - p = strchr(buf, '\n'); - if (p != NULL) - *p = 0; - - /* Split string into at most RTE_MAX_LCORE_FREQS frequencies */ - count = rte_strsplit(buf, sizeof(buf), freqs, - RTE_MAX_LCORE_FREQS, ' '); - if (count <= 0) { - RTE_LOG(ERR, POWER, "No available frequency in " - ""POWER_SYSFILE_AVAIL_FREQ"\n", pi->lcore_id); - goto out; - } - if (count >= RTE_MAX_LCORE_FREQS) { - RTE_LOG(ERR, POWER, "Too many available frequencies : %d\n", - count); - goto out; - } - - /* Store the available frequncies into power context */ - for (i = 0, pi->nb_freqs = 0; i < count; i++) { - POWER_DEBUG_TRACE("Lcore %u frequency[%d]: %s\n", pi->lcore_id, - i, freqs[i]); - pi->freqs[pi->nb_freqs++] = strtoul(freqs[i], &p, - POWER_CONVERT_TO_DECIMAL); - } - - ret = 0; - POWER_DEBUG_TRACE("%d frequencie(s) of lcore %u are available\n", - count, pi->lcore_id); -out: - fclose(f); - - return ret; -} - -/** - * It is to fopen the sys file for the future setting the lcore frequency. - */ -static int -power_init_for_setting_freq(struct rte_power_info *pi) -{ - FILE *f; - char fullpath[PATH_MAX]; - char buf[BUFSIZ]; - uint32_t i, freq; - char *s; - - snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_SETSPEED, - pi->lcore_id); - f = fopen(fullpath, "rw+"); - FOPEN_OR_ERR_RET(f, -1); - - s = fgets(buf, sizeof(buf), f); - FOPS_OR_NULL_GOTO(s, out); - - freq = strtoul(buf, NULL, POWER_CONVERT_TO_DECIMAL); - for (i = 0; i < pi->nb_freqs; i++) { - if (freq == pi->freqs[i]) { - pi->curr_idx = i; - pi->f = f; - return 0; - } - } - -out: - fclose(f); - - return -1; -} - -int -rte_power_acpi_cpufreq_init(unsigned lcore_id) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n", - lcore_id, RTE_MAX_LCORE - 1U); - return -1; - } - - pi = &lcore_power_info[lcore_id]; - if (rte_atomic32_cmpset(&(pi->state), POWER_IDLE, POWER_ONGOING) - == 0) { - RTE_LOG(INFO, POWER, "Power management of lcore %u is " - "in use\n", lcore_id); - return -1; - } - - pi->lcore_id = lcore_id; - /* Check and set the governor */ - if (power_set_governor_userspace(pi) < 0) { - RTE_LOG(ERR, POWER, "Cannot set governor of lcore %u to " - "userspace\n", lcore_id); - goto fail; - } - - /* Get the available frequencies */ - if (power_get_available_freqs(pi) < 0) { - RTE_LOG(ERR, POWER, "Cannot get available frequencies of " - "lcore %u\n", lcore_id); - goto fail; - } - - /* Init for setting lcore frequency */ - if (power_init_for_setting_freq(pi) < 0) { - RTE_LOG(ERR, POWER, "Cannot init for setting frequency for " - "lcore %u\n", lcore_id); - goto fail; - } - - /* Set freq to max by default */ - if (rte_power_acpi_cpufreq_freq_max(lcore_id) < 0) { - RTE_LOG(ERR, POWER, "Cannot set frequency of lcore %u " - "to max\n", lcore_id); - goto fail; - } - - RTE_LOG(INFO, POWER, "Initialized successfully for lcore %u " - "power manamgement\n", lcore_id); - rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_USED); - - return 0; - -fail: - rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN); - - return -1; -} - -/** - * It is to check the governor and then set the original governor back if - * needed by writing the the sys file. - */ -static int -power_set_governor_original(struct rte_power_info *pi) -{ - FILE *f; - int ret = -1; - char buf[BUFSIZ]; - char fullpath[PATH_MAX]; - char *s; - int val; - - snprintf(fullpath, sizeof(fullpath), POWER_SYSFILE_GOVERNOR, - pi->lcore_id); - f = fopen(fullpath, "rw+"); - FOPEN_OR_ERR_RET(f, ret); - - s = fgets(buf, sizeof(buf), f); - FOPS_OR_NULL_GOTO(s, out); - - /* Check if the governor to be set is the same as current */ - if (strncmp(buf, pi->governor_ori, sizeof(pi->governor_ori)) == 0) { - ret = 0; - POWER_DEBUG_TRACE("Power management governor of lcore %u " - "has already been set to %s\n", - pi->lcore_id, pi->governor_ori); - goto out; - } - - /* Write back the original governor */ - val = fseek(f, 0, SEEK_SET); - FOPS_OR_ERR_GOTO(val, out); - - val = fputs(pi->governor_ori, f); - FOPS_OR_ERR_GOTO(val, out); - - ret = 0; - RTE_LOG(INFO, POWER, "Power management governor of lcore %u " - "has been set back to %s successfully\n", - pi->lcore_id, pi->governor_ori); -out: - fclose(f); - - return ret; -} - -int -rte_power_acpi_cpufreq_exit(unsigned lcore_id) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Lcore id %u can not exceeds %u\n", - lcore_id, RTE_MAX_LCORE - 1U); - return -1; - } - pi = &lcore_power_info[lcore_id]; - if (rte_atomic32_cmpset(&(pi->state), POWER_USED, POWER_ONGOING) - == 0) { - RTE_LOG(INFO, POWER, "Power management of lcore %u is " - "not used\n", lcore_id); - return -1; - } - - /* Close FD of setting freq */ - fclose(pi->f); - pi->f = NULL; - - /* Set the governor back to the original */ - if (power_set_governor_original(pi) < 0) { - RTE_LOG(ERR, POWER, "Cannot set the governor of %u back " - "to the original\n", lcore_id); - goto fail; - } - - RTE_LOG(INFO, POWER, "Power management of lcore %u has exited from " - "'userspace' mode and been set back to the " - "original\n", lcore_id); - rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_IDLE); - - return 0; - -fail: - rte_atomic32_cmpset(&(pi->state), POWER_ONGOING, POWER_UNKNOWN); - - return -1; -} - -uint32_t -rte_power_acpi_cpufreq_freqs(unsigned lcore_id, uint32_t *freqs, uint32_t num) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE || !freqs) { - RTE_LOG(ERR, POWER, "Invalid input parameter\n"); - return 0; - } - - pi = &lcore_power_info[lcore_id]; - if (num < pi->nb_freqs) { - RTE_LOG(ERR, POWER, "Buffer size is not enough\n"); - return 0; - } - rte_memcpy(freqs, pi->freqs, pi->nb_freqs * sizeof(uint32_t)); - - return pi->nb_freqs; -} - -uint32_t -rte_power_acpi_cpufreq_get_freq(unsigned lcore_id) -{ - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return RTE_POWER_INVALID_FREQ_INDEX; - } - - return lcore_power_info[lcore_id].curr_idx; -} - -int -rte_power_acpi_cpufreq_set_freq(unsigned lcore_id, uint32_t index) -{ - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return -1; - } - - return set_freq_internal(&(lcore_power_info[lcore_id]), index); -} - -int -rte_power_acpi_cpufreq_freq_down(unsigned lcore_id) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return -1; - } - - pi = &lcore_power_info[lcore_id]; - if (pi->curr_idx + 1 == pi->nb_freqs) - return 0; - - /* Frequencies in the array are from high to low. */ - return set_freq_internal(pi, pi->curr_idx + 1); -} - -int -rte_power_acpi_cpufreq_freq_up(unsigned lcore_id) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return -1; - } - - pi = &lcore_power_info[lcore_id]; - if (pi->curr_idx == 0) - return 0; - - /* Frequencies in the array are from high to low. */ - return set_freq_internal(pi, pi->curr_idx - 1); -} - -int -rte_power_acpi_cpufreq_freq_max(unsigned lcore_id) -{ - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return -1; - } - - /* Frequencies in the array are from high to low. */ - return set_freq_internal(&lcore_power_info[lcore_id], 0); -} - -int -rte_power_acpi_cpufreq_freq_min(unsigned lcore_id) -{ - struct rte_power_info *pi; - - if (lcore_id >= RTE_MAX_LCORE) { - RTE_LOG(ERR, POWER, "Invalid lcore ID\n"); - return -1; - } - - pi = &lcore_power_info[lcore_id]; - - /* Frequencies in the array are from high to low. */ - return set_freq_internal(pi, pi->nb_freqs - 1); -} |