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b130d07f90
shadowing a global declaration.
186 lines
4.8 KiB
C
186 lines
4.8 KiB
C
/*-
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* Copyright (c) 2016 Netflix, Inc
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/ioccom.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "nvmecontrol.h"
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_Static_assert(sizeof(struct nvme_power_state) == 256 / NBBY,
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"nvme_power_state size wrong");
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static void
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power_usage(void)
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{
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fprintf(stderr, "usage:\n");
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fprintf(stderr, POWER_USAGE);
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exit(1);
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}
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static void
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power_list_one(int i, struct nvme_power_state *nps)
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{
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int mpower, apower, ipower;
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mpower = nps->mp;
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if (nps->mps == 0)
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mpower *= 100;
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ipower = nps->idlp;
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if (nps->ips == 1)
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ipower *= 100;
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apower = nps->actp;
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if (nps->aps == 1)
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apower *= 100;
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printf("%2d: %2d.%04dW%c %3d.%03dms %3d.%03dms %2d %2d %2d %2d %2d.%04dW %2d.%04dW %d\n",
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i, mpower / 10000, mpower % 10000,
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nps->nops ? '*' : ' ', nps->enlat / 1000, nps->enlat % 1000,
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nps->exlat / 1000, nps->exlat % 1000, nps->rrt, nps->rrl,
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nps->rwt, nps->rwl, ipower / 10000, ipower % 10000,
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apower / 10000, apower % 10000, nps->apw);
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}
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static void
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power_list(struct nvme_controller_data *cdata)
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{
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int i;
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printf("\nPower States Supported: %d\n\n", cdata->npss + 1);
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printf(" # Max pwr Enter Lat Exit Lat RT RL WT WL Idle Pwr Act Pwr Workloadd\n");
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printf("-- -------- --------- --------- -- -- -- -- -------- -------- --\n");
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for (i = 0; i <= cdata->npss; i++)
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power_list_one(i, &cdata->power_state[i]);
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}
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static void
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power_set(int fd, int power_val, int workload, int perm)
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{
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struct nvme_pt_command pt;
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uint32_t p;
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p = perm ? (1u << 31) : 0;
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memset(&pt, 0, sizeof(pt));
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pt.cmd.opc = NVME_OPC_SET_FEATURES;
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pt.cmd.cdw10 = NVME_FEAT_POWER_MANAGEMENT | p;
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pt.cmd.cdw11 = power_val | (workload << 5);
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if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
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err(1, "set feature power mgmt request failed");
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if (nvme_completion_is_error(&pt.cpl))
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errx(1, "set feature power mgmt request returned error");
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}
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static void
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power_show(int fd)
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{
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struct nvme_pt_command pt;
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memset(&pt, 0, sizeof(pt));
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pt.cmd.opc = NVME_OPC_GET_FEATURES;
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pt.cmd.cdw10 = NVME_FEAT_POWER_MANAGEMENT;
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if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
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err(1, "set feature power mgmt request failed");
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if (nvme_completion_is_error(&pt.cpl))
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errx(1, "set feature power mgmt request returned error");
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printf("Current Power Mode is %d\n", pt.cpl.cdw0);
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}
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void
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power(int argc, char *argv[])
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{
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struct nvme_controller_data cdata;
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int ch, listflag = 0, powerflag = 0, power_val = 0, fd;
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int workload = 0;
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char *end;
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while ((ch = getopt(argc, argv, "lp:w:")) != -1) {
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switch ((char)ch) {
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case 'l':
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listflag = 1;
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break;
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case 'p':
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powerflag = 1;
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power_val = strtol(optarg, &end, 0);
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if (*end != '\0') {
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fprintf(stderr, "Invalid power state number: %s\n", optarg);
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power_usage();
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}
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break;
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case 'w':
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workload = strtol(optarg, &end, 0);
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if (*end != '\0') {
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fprintf(stderr, "Invalid workload hint: %s\n", optarg);
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power_usage();
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}
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break;
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default:
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power_usage();
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}
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}
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/* Check that a controller was specified. */
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if (optind >= argc)
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power_usage();
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if (listflag && powerflag) {
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fprintf(stderr, "Can't set power and list power states\n");
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power_usage();
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}
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open_dev(argv[optind], &fd, 1, 1);
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read_controller_data(fd, &cdata);
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if (listflag) {
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power_list(&cdata);
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goto out;
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}
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if (powerflag) {
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power_set(fd, power_val, workload, 0);
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goto out;
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}
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power_show(fd);
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out:
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close(fd);
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exit(0);
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}
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