drivers/gpu/drm/amd/amdgpu/athub_v1_0.c

   1 /*
   2  * Copyright 2016 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23 #include "amdgpu.h"
  24 #include "athub_v1_0.h"
  25
  26 #include "athub/athub_1_0_offset.h"
  27 #include "athub/athub_1_0_sh_mask.h"
  28 #include "vega10_enum.h"
  29
  30 #include "soc15_common.h"
  31
  32 static void athub_update_medium_grain_clock_gating(struct amdgpu_device *adev,
  33                                                    bool enable)
  34 {
  35         uint32_t def, data;
  36
  37         def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  38
  39         if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
  40                 data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  41         else
  42                 data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  43
  44         if (def != data)
  45                 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  46 }
  47
  48 static void athub_update_medium_grain_light_sleep(struct amdgpu_device *adev,
  49                                                   bool enable)
  50 {
  51         uint32_t def, data;
  52
  53         def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  54
  55         if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
  56             (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS))
  57                 data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  58         else
  59                 data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  60
  61         if(def != data)
  62                 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  63 }
  64
  65 int athub_v1_0_set_clockgating(struct amdgpu_device *adev,
  66                                enum amd_clockgating_state state)
  67 {
  68         if (amdgpu_sriov_vf(adev))
  69                 return 0;
  70
  71         switch (adev->asic_type) {
  72         case CHIP_VEGA10:
  73         case CHIP_VEGA12:
  74         case CHIP_VEGA20:
  75         case CHIP_RAVEN:
  76                 athub_update_medium_grain_clock_gating(adev,
  77                                 state == AMD_CG_STATE_GATE ? true : false);
  78                 athub_update_medium_grain_light_sleep(adev,
  79                                 state == AMD_CG_STATE_GATE ? true : false);
  80                 break;
  81         default:
  82                 break;
  83         }
  84
  85         return 0;
  86 }
  87
  88 void athub_v1_0_get_clockgating(struct amdgpu_device *adev, u32 *flags)
  89 {
  90         int data;
  91
  92         if (amdgpu_sriov_vf(adev))
  93                 *flags = 0;
  94
  95         /* AMD_CG_SUPPORT_ATHUB_MGCG */
  96         data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  97         if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
  98                 *flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
  99
 100         /* AMD_CG_SUPPORT_ATHUB_LS */
 101         if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
 102                 *flags |= AMD_CG_SUPPORT_ATHUB_LS;
 103 }