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      1 /*	$NetBSD: amdgpu_vega20_powertune.c,v 1.2 2021/12/18 23:45:26 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2018 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  */
     25 
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: amdgpu_vega20_powertune.c,v 1.2 2021/12/18 23:45:26 riastradh Exp $");
     28 
     29 #include "hwmgr.h"
     30 #include "vega20_hwmgr.h"
     31 #include "vega20_powertune.h"
     32 #include "vega20_smumgr.h"
     33 #include "vega20_ppsmc.h"
     34 #include "vega20_inc.h"
     35 #include "pp_debug.h"
     36 
     37 int vega20_set_power_limit(struct pp_hwmgr *hwmgr, uint32_t n)
     38 {
     39 	struct vega20_hwmgr *data =
     40 			(struct vega20_hwmgr *)(hwmgr->backend);
     41 
     42 	if (data->smu_features[GNLD_PPT].enabled)
     43 		return smum_send_msg_to_smc_with_parameter(hwmgr,
     44 				PPSMC_MSG_SetPptLimit, n);
     45 
     46 	return 0;
     47 }
     48 
     49 int vega20_validate_power_level_request(struct pp_hwmgr *hwmgr,
     50 		uint32_t tdp_percentage_adjustment, uint32_t tdp_absolute_value_adjustment)
     51 {
     52 	return (tdp_percentage_adjustment > hwmgr->platform_descriptor.TDPLimit) ? -1 : 0;
     53 }
     54 
     55 static int vega20_set_overdrive_target_percentage(struct pp_hwmgr *hwmgr,
     56 		uint32_t adjust_percent)
     57 {
     58 	return smum_send_msg_to_smc_with_parameter(hwmgr,
     59 			PPSMC_MSG_OverDriveSetPercentage, adjust_percent);
     60 }
     61 
     62 int vega20_power_control_set_level(struct pp_hwmgr *hwmgr)
     63 {
     64 	int adjust_percent, result = 0;
     65 
     66 	if (PP_CAP(PHM_PlatformCaps_PowerContainment)) {
     67 		adjust_percent =
     68 				hwmgr->platform_descriptor.TDPAdjustmentPolarity ?
     69 				hwmgr->platform_descriptor.TDPAdjustment :
     70 				(-1 * hwmgr->platform_descriptor.TDPAdjustment);
     71 		result = vega20_set_overdrive_target_percentage(hwmgr,
     72 				(uint32_t)adjust_percent);
     73 	}
     74 	return result;
     75 }
     76