xref: /OK3568_Linux_fs/kernel/drivers/gpu/drm/i915/selftests/librapl.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: MIT
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * Copyright © 2020 Intel Corporation
4*4882a593Smuzhiyun  */
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #include <asm/msr.h>
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #include "librapl.h"
9*4882a593Smuzhiyun 
librapl_energy_uJ(void)10*4882a593Smuzhiyun u64 librapl_energy_uJ(void)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun 	unsigned long long power;
13*4882a593Smuzhiyun 	u32 units;
14*4882a593Smuzhiyun 
15*4882a593Smuzhiyun 	if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power))
16*4882a593Smuzhiyun 		return 0;
17*4882a593Smuzhiyun 
18*4882a593Smuzhiyun 	units = (power & 0x1f00) >> 8;
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun 	if (rdmsrl_safe(MSR_PP1_ENERGY_STATUS, &power))
21*4882a593Smuzhiyun 		return 0;
22*4882a593Smuzhiyun 
23*4882a593Smuzhiyun 	return (1000000 * power) >> units; /* convert to uJ */
24*4882a593Smuzhiyun }
25