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hwpstate_amd: calculate power if P-state info comes from MSR

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Reviewed by:	markj
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D40140
This commit is contained in:
Johannes Totz 2023-06-12 12:00:15 -04:00 committed by Mark Johnston
parent 2c0cd59345
commit e74dd9577f
1 changed files with 28 additions and 4 deletions
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32
sys/x86/cpufreq/hwpstate_amd.c
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@ -85,6 +85,8 @@ __FBSDID("$FreeBSD$");
#define AMD_10H_11H_CUR_DID(msr) (((msr) >> 6) & 0x07)
#define AMD_10H_11H_CUR_FID(msr) ((msr) & 0x3F)
#define AMD_17H_CUR_IDIV(msr) (((msr) >> 30) & 0x03)
#define AMD_17H_CUR_IDD(msr) (((msr) >> 22) & 0xFF)
#define AMD_17H_CUR_VID(msr) (((msr) >> 14) & 0xFF)
#define AMD_17H_CUR_DID(msr) (((msr) >> 8) & 0x3F)
#define AMD_17H_CUR_FID(msr) ((msr) & 0xFF)
@ -446,6 +448,9 @@ hwpstate_get_info_from_msr(device_t dev)
did = AMD_10H_11H_CUR_DID(msr);
fid = AMD_10H_11H_CUR_FID(msr);
hwpstate_set[i].volts = CPUFREQ_VAL_UNKNOWN;
hwpstate_set[i].power = CPUFREQ_VAL_UNKNOWN;
hwpstate_set[i].lat = CPUFREQ_VAL_UNKNOWN;
/* Convert fid/did to frequency. */
switch (family) {
case 0x11:
@ -466,6 +471,29 @@ hwpstate_get_info_from_msr(device_t dev)
}
fid = AMD_17H_CUR_FID(msr);
hwpstate_set[i].freq = (200 * fid) / did;
/* Vid step is 6.25mV, so scale by 100. */
hwpstate_set[i].volts =
(155000 - (625 * AMD_17H_CUR_VID(msr))) / 100;
/*
* Calculate current first.
* This equation is mentioned in
* "BKDG for AMD Family 15h Models 70h-7fh Processors",
* section 2.5.2.1.6.
*/
hwpstate_set[i].power = AMD_17H_CUR_IDD(msr) * 1000;
switch (AMD_17H_CUR_IDIV(msr)) {
case 3: /* divide by 1000 */
hwpstate_set[i].power /= 10;
case 2: /* divide by 100 */
hwpstate_set[i].power /= 10;
case 1: /* divide by 10 */
hwpstate_set[i].power /= 10;
case 0: /* divide by 1 */
;
}
hwpstate_set[i].power *= hwpstate_set[i].volts;
/* Milli amps * milli volts to milli watts. */
hwpstate_set[i].power /= 1000;
break;
default:
HWPSTATE_DEBUG(dev, "get_info_from_msr: %s family"
@ -475,10 +503,6 @@ hwpstate_get_info_from_msr(device_t dev)
return (ENXIO);
}
hwpstate_set[i].pstate_id = i;
/* There was volts calculation, but deleted it. */
hwpstate_set[i].volts = CPUFREQ_VAL_UNKNOWN;
hwpstate_set[i].power = CPUFREQ_VAL_UNKNOWN;
hwpstate_set[i].lat = CPUFREQ_VAL_UNKNOWN;
}
return (0);
}