1/*
2 * Copyright 2020 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 "smuio_v9_0.h"
25#include "smuio/smuio_9_0_offset.h"
26#include "smuio/smuio_9_0_sh_mask.h"
27
28static u32 smuio_v9_0_get_rom_index_offset(struct amdgpu_device *adev)
29{
30 return SOC15_REG_OFFSET(SMUIO, 0, mmROM_INDEX);
31}
32
33static u32 smuio_v9_0_get_rom_data_offset(struct amdgpu_device *adev)
34{
35 return SOC15_REG_OFFSET(SMUIO, 0, mmROM_DATA);
36}
37
38static void smuio_v9_0_update_rom_clock_gating(struct amdgpu_device *adev, bool enable)
39{
40 u32 def, data;
41
42 /* enable/disable ROM CG is not supported on APU */
43 if (adev->flags & AMD_IS_APU)
44 return;
45
46 def = data = RREG32_SOC15(SMUIO, 0, mmCGTT_ROM_CLK_CTRL0);
47
48 if (enable && (adev->cg_flags & AMD_CG_SUPPORT_ROM_MGCG))
49 data &= ~(CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
50 CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK);
51 else
52 data |= CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
53 CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK;
54
55 if (def != data)
56 WREG32_SOC15(SMUIO, 0, mmCGTT_ROM_CLK_CTRL0, data);
57}
58
59static void smuio_v9_0_get_clock_gating_state(struct amdgpu_device *adev, u64 *flags)
60{
61 u32 data;
62
63 /* CGTT_ROM_CLK_CTRL0 is not available for APUs */
64 if (adev->flags & AMD_IS_APU)
65 return;
66
67 data = RREG32_SOC15(SMUIO, 0, mmCGTT_ROM_CLK_CTRL0);
68 if (!(data & CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK))
69 *flags |= AMD_CG_SUPPORT_ROM_MGCG;
70}
71
72const struct amdgpu_smuio_funcs smuio_v9_0_funcs = {
73 .get_rom_index_offset = smuio_v9_0_get_rom_index_offset,
74 .get_rom_data_offset = smuio_v9_0_get_rom_data_offset,
75 .update_rom_clock_gating = smuio_v9_0_update_rom_clock_gating,
76 .get_clock_gating_state = smuio_v9_0_get_clock_gating_state,
77};
78

source code of linux/drivers/gpu/drm/amd/amdgpu/smuio_v9_0.c