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_v13_0.h"
25 #include "smuio/smuio_13_0_2_offset.h"
26 #include "smuio/smuio_13_0_2_sh_mask.h"
27 
28 #define SMUIO_MCM_CONFIG__HOST_GPU_XGMI_MASK	0x00000001L
29 
30 static u32 smuio_v13_0_get_rom_index_offset(struct amdgpu_device *adev)
31 {
32 	return SOC15_REG_OFFSET(SMUIO, 0, regROM_INDEX);
33 }
34 
35 static u32 smuio_v13_0_get_rom_data_offset(struct amdgpu_device *adev)
36 {
37 	return SOC15_REG_OFFSET(SMUIO, 0, regROM_DATA);
38 }
39 
40 static void smuio_v13_0_update_rom_clock_gating(struct amdgpu_device *adev, bool enable)
41 {
42 	u32 def, data;
43 
44 	/* enable/disable ROM CG is not supported on APU */
45 	if (adev->flags & AMD_IS_APU)
46 		return;
47 
48 	def = data = RREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0);
49 
50 	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_ROM_MGCG))
51 		data &= ~(CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
52 			CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK);
53 	else
54 		data |= CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
55 			CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK;
56 
57 	if (def != data)
58 		WREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0, data);
59 }
60 
61 static void smuio_v13_0_get_clock_gating_state(struct amdgpu_device *adev, u32 *flags)
62 {
63 	u32 data;
64 
65 	/* CGTT_ROM_CLK_CTRL0 is not available for APU */
66 	if (adev->flags & AMD_IS_APU)
67 		return;
68 
69 	data = RREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0);
70 	if (!(data & CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK))
71 		*flags |= AMD_CG_SUPPORT_ROM_MGCG;
72 }
73 
74 /**
75  * smuio_v13_0_get_die_id - query die id from FCH.
76  *
77  * @adev: amdgpu device pointer
78  *
79  * Returns die id
80  */
81 static u32 smuio_v13_0_get_die_id(struct amdgpu_device *adev)
82 {
83 	u32 data, die_id;
84 
85 	data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
86 	die_id = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, DIE_ID);
87 
88 	return die_id;
89 }
90 
91 /**
92  * smuio_v13_0_supports_host_gpu_xgmi - detect xgmi interface between cpu and gpu/s.
93  *
94  * @adev: amdgpu device pointer
95  *
96  * Returns true on success or false otherwise.
97  */
98 static bool smuio_v13_0_is_host_gpu_xgmi_supported(struct amdgpu_device *adev)
99 {
100 	u32 data;
101 
102 	data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
103 	data = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, TOPOLOGY_ID);
104 	/* data[4:0]
105 	 * bit 0 == 0 host-gpu interface is PCIE
106 	 * bit 0 == 1 host-gpu interface is Alternate Protocal
107 	 * for AMD, this is XGMI
108 	 */
109 	data &= SMUIO_MCM_CONFIG__HOST_GPU_XGMI_MASK;
110 
111 	return data ? true : false;
112 }
113 
114 const struct amdgpu_smuio_funcs smuio_v13_0_funcs = {
115 	.get_rom_index_offset = smuio_v13_0_get_rom_index_offset,
116 	.get_rom_data_offset = smuio_v13_0_get_rom_data_offset,
117 	.get_die_id = smuio_v13_0_get_die_id,
118 	.is_host_gpu_xgmi_supported = smuio_v13_0_is_host_gpu_xgmi_supported,
119 	.update_rom_clock_gating = smuio_v13_0_update_rom_clock_gating,
120 	.get_clock_gating_state = smuio_v13_0_get_clock_gating_state,
121 };
122