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 
28 static u32 smuio_v9_0_get_rom_index_offset(struct amdgpu_device *adev)
29 {
30 	return SOC15_REG_OFFSET(SMUIO, 0, mmROM_INDEX);
31 }
32 
33 static u32 smuio_v9_0_get_rom_data_offset(struct amdgpu_device *adev)
34 {
35 	return SOC15_REG_OFFSET(SMUIO, 0, mmROM_DATA);
36 }
37 
38 static 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 
59 static void smuio_v9_0_get_clock_gating_state(struct amdgpu_device *adev, u32 *flags)
60 {
61 	u32 data;
62 
63 	/* CGTT_ROM_CLK_CTRL0 is not availabe 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 
72 const 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