1/*
2 * Copyright 2018 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 "soc15.h"
25#include "soc15_hw_ip.h"
26#include "soc15_common.h"
27#include "vega20_inc.h"
28#include "vega20_ppsmc.h"
29#include "vega20_baco.h"
30#include "vega20_smumgr.h"
31
32#include "amdgpu_ras.h"
33
34static const struct soc15_baco_cmd_entry clean_baco_tbl[] = {
35 {CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_6), 0, 0, 0, 0},
36 {CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_7), 0, 0, 0, 0},
37};
38
39bool vega20_baco_get_capability(struct pp_hwmgr *hwmgr)
40{
41 struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
42 uint32_t reg;
43
44 if (!phm_cap_enabled(caps: hwmgr->platform_descriptor.platformCaps, c: PHM_PlatformCaps_BACO))
45 return false;
46
47 if (((RREG32(0x17569) & 0x20000000) >> 29) == 0x1) {
48 reg = RREG32_SOC15(NBIF, 0, mmRCC_BIF_STRAP0);
49
50 if (reg & RCC_BIF_STRAP0__STRAP_PX_CAPABLE_MASK)
51 return true;
52 }
53
54 return false;
55}
56
57int vega20_baco_get_state(struct pp_hwmgr *hwmgr, enum BACO_STATE *state)
58{
59 struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
60 uint32_t reg;
61
62 reg = RREG32_SOC15(NBIF, 0, mmBACO_CNTL);
63
64 if (reg & BACO_CNTL__BACO_MODE_MASK)
65 /* gfx has already entered BACO state */
66 *state = BACO_STATE_IN;
67 else
68 *state = BACO_STATE_OUT;
69 return 0;
70}
71
72int vega20_baco_set_state(struct pp_hwmgr *hwmgr, enum BACO_STATE state)
73{
74 struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
75 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev);
76 enum BACO_STATE cur_state;
77 uint32_t data;
78
79 vega20_baco_get_state(hwmgr, state: &cur_state);
80
81 if (cur_state == state)
82 /* aisc already in the target state */
83 return 0;
84
85 if (state == BACO_STATE_IN) {
86 if (!ras || !adev->ras_enabled) {
87 data = RREG32_SOC15(THM, 0, mmTHM_BACO_CNTL);
88 data |= 0x80000000;
89 WREG32_SOC15(THM, 0, mmTHM_BACO_CNTL, data);
90
91 if (smum_send_msg_to_smc_with_parameter(hwmgr,
92 PPSMC_MSG_EnterBaco, parameter: 0, NULL))
93 return -EINVAL;
94 } else {
95 if (smum_send_msg_to_smc_with_parameter(hwmgr,
96 PPSMC_MSG_EnterBaco, parameter: 1, NULL))
97 return -EINVAL;
98 }
99
100 } else if (state == BACO_STATE_OUT) {
101 if (smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ExitBaco, NULL))
102 return -EINVAL;
103 if (!soc15_baco_program_registers(hwmgr, entry: clean_baco_tbl,
104 ARRAY_SIZE(clean_baco_tbl)))
105 return -EINVAL;
106 }
107
108 return 0;
109}
110
111int vega20_baco_apply_vdci_flush_workaround(struct pp_hwmgr *hwmgr)
112{
113 int ret = 0;
114
115 ret = vega20_set_pptable_driver_address(hwmgr);
116 if (ret)
117 return ret;
118
119 return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_BacoWorkAroundFlushVDCI, NULL);
120}
121

source code of linux/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_baco.c