LXR linux/drivers/gpu/drm/amd/amdgpu/athub_v2

   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_1.h"
  26
  27#include "athub/athub_2_1_0_offset.h"
  28#include "athub/athub_2_1_0_sh_mask.h"
  29
  30#include "soc15_common.h"
  31
  32static void
  33athub_v2_1_update_medium_grain_clock_gating(struct amdgpu_device *adev,
  34                                            bool enable)
  35{
  36        uint32_t def, data;
  37
  38        def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  39
  40        if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
  41                data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  42        else
  43                data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
  44
  45        if (def != data)
  46                WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  47}
  48
  49static void
  50athub_v2_1_update_medium_grain_light_sleep(struct amdgpu_device *adev,
  51                                           bool enable)
  52{
  53        uint32_t def, data;
  54
  55        def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  56
  57        if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
  58            (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS))
  59                data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  60        else
  61                data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
  62
  63        if(def != data)
  64                WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
  65}
  66
  67int athub_v2_1_set_clockgating(struct amdgpu_device *adev,
  68                               enum amd_clockgating_state state)
  69{
  70        if (amdgpu_sriov_vf(adev))
  71                return 0;
  72
  73        switch (adev->ip_versions[ATHUB_HWIP][0]) {
  74        case IP_VERSION(2, 1, 0):
  75        case IP_VERSION(2, 1, 1):
  76        case IP_VERSION(2, 1, 2):
  77                athub_v2_1_update_medium_grain_clock_gating(adev, state == AMD_CG_STATE_GATE);
  78                athub_v2_1_update_medium_grain_light_sleep(adev, state == AMD_CG_STATE_GATE);
  79                break;
  80        default:
  81                break;
  82        }
  83
  84        return 0;
  85}
  86
  87void athub_v2_1_get_clockgating(struct amdgpu_device *adev, u32 *flags)
  88{
  89        int data;
  90
  91        /* AMD_CG_SUPPORT_ATHUB_MGCG */
  92        data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
  93        if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
  94                *flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
  95
  96        /* AMD_CG_SUPPORT_ATHUB_LS */
  97        if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
  98                *flags |= AMD_CG_SUPPORT_ATHUB_LS;
  99}
 100