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