2 * Copyright (c) 2016 Netflix, Inc.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/ioccom.h>
41 #include "nvmecontrol.h"
43 _Static_assert(sizeof(struct nvme_power_state) == 256 / NBBY,
44 "nvme_power_state size wrong");
47 "power [-l] [-p new-state [-w workload-hint]] <controller id>\n"
50 power_list_one(int i, struct nvme_power_state *nps)
52 int mpower, apower, ipower;
53 uint8_t mps, nops, aps, apw;
55 mps = (nps->mps_nops >> NVME_PWR_ST_MPS_SHIFT) &
57 nops = (nps->mps_nops >> NVME_PWR_ST_NOPS_SHIFT) &
58 NVME_PWR_ST_NOPS_MASK;
59 apw = (nps->apw_aps >> NVME_PWR_ST_APW_SHIFT) &
61 aps = (nps->apw_aps >> NVME_PWR_ST_APS_SHIFT) &
73 printf("%2d: %2d.%04dW%c %3d.%03dms %3d.%03dms %2d %2d %2d %2d %2d.%04dW %2d.%04dW %d\n",
74 i, mpower / 10000, mpower % 10000,
75 nops ? '*' : ' ', nps->enlat / 1000, nps->enlat % 1000,
76 nps->exlat / 1000, nps->exlat % 1000, nps->rrt, nps->rrl,
77 nps->rwt, nps->rwl, ipower / 10000, ipower % 10000,
78 apower / 10000, apower % 10000, apw);
82 power_list(struct nvme_controller_data *cdata)
86 printf("\nPower States Supported: %d\n\n", cdata->npss + 1);
87 printf(" # Max pwr Enter Lat Exit Lat RT RL WT WL Idle Pwr Act Pwr Workloadd\n");
88 printf("-- -------- --------- --------- -- -- -- -- -------- -------- --\n");
89 for (i = 0; i <= cdata->npss; i++)
90 power_list_one(i, &cdata->power_state[i]);
94 power_set(int fd, int power_val, int workload, int perm)
96 struct nvme_pt_command pt;
99 p = perm ? (1u << 31) : 0;
100 memset(&pt, 0, sizeof(pt));
101 pt.cmd.opc = NVME_OPC_SET_FEATURES;
102 pt.cmd.cdw10 = htole32(NVME_FEAT_POWER_MANAGEMENT | p);
103 pt.cmd.cdw11 = htole32(power_val | (workload << 5));
105 if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
106 err(1, "set feature power mgmt request failed");
108 if (nvme_completion_is_error(&pt.cpl))
109 errx(1, "set feature power mgmt request returned error");
115 struct nvme_pt_command pt;
117 memset(&pt, 0, sizeof(pt));
118 pt.cmd.opc = NVME_OPC_GET_FEATURES;
119 pt.cmd.cdw10 = htole32(NVME_FEAT_POWER_MANAGEMENT);
121 if (ioctl(fd, NVME_PASSTHROUGH_CMD, &pt) < 0)
122 err(1, "set feature power mgmt request failed");
124 if (nvme_completion_is_error(&pt.cpl))
125 errx(1, "set feature power mgmt request returned error");
127 printf("Current Power Mode is %d\n", pt.cpl.cdw0);
131 power(const struct nvme_function *nf, int argc, char *argv[])
133 struct nvme_controller_data cdata;
134 int ch, listflag = 0, powerflag = 0, power_val = 0, fd;
138 while ((ch = getopt(argc, argv, "lp:w:")) != -1) {
145 power_val = strtol(optarg, &end, 0);
147 fprintf(stderr, "Invalid power state number: %s\n", optarg);
152 workload = strtol(optarg, &end, 0);
154 fprintf(stderr, "Invalid workload hint: %s\n", optarg);
163 /* Check that a controller was specified. */
167 if (listflag && powerflag) {
168 fprintf(stderr, "Can't set power and list power states\n");
172 open_dev(argv[optind], &fd, 1, 1);
173 read_controller_data(fd, &cdata);
181 power_set(fd, power_val, workload, 0);
191 NVME_COMMAND(top, power, power, POWER_USAGE);