drivers/gpu/drm/amd/amdgpu/athub_v2_0.c

   1 /*
   2  * Copyright 2019 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
  24 #include "amdgpu.h"
  25 #include "athub_v2_0.h"
  26
  27 #include "athub/athub_2_0_0_offset.h"
  28 #include "athub/athub_2_0_0_sh_mask.h"
  29 #include "athub/athub_2_0_0_default.h"
  30 #include "navi10_enum.h"
  31
  32 #include "soc15_common.h"
  33
  34 static void
  35 athub_v2_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
  36                                             bool enable)
  37 {
  38         uint32_t def, data;
  39
  40         def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  41
  42         if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
  43                 data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  44         else
  45                 data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  46
  47         if (def != data)
  48                 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  49 }
  50
  51 static void
  52 athub_v2_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
  53                                            bool enable)
  54 {
  55         uint32_t def, data;
  56
  57         def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  58
  59         if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
  60             (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS))
  61                 data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  62         else
  63                 data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  64
  65         if (def != data)
  66                 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  67 }
  68
  69 int athub_v2_0_set_clockgating(struct amdgpu_device *adev,
  70                                enum amd_clockgating_state state)
  71 {
  72         if (amdgpu_sriov_vf(adev))
  73                 return 0;
  74
  75         switch (adev->asic_type) {
  76         case CHIP_NAVI10:
  77         case CHIP_NAVI14:
  78         case CHIP_NAVI12:
  79                 athub_v2_0_update_medium_grain_clock_gating(adev,
  80                                 state == AMD_CG_STATE_GATE ? true : false);
  81                 athub_v2_0_update_medium_grain_light_sleep(adev,
  82                                 state == AMD_CG_STATE_GATE ? true : false);
  83                 break;
  84         default:
  85                 break;
  86         }
  87
  88         return 0;
  89 }
  90
  91 void athub_v2_0_get_clockgating(struct amdgpu_device *adev, u32 *flags)
  92 {
  93         int data;
  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 }